diff options
Diffstat (limited to 'src/plugins/sctp')
| -rw-r--r-- | src/plugins/sctp/CMakeLists.txt | 36 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp.api | 50 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp.c | 1130 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp.h | 1019 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_api.c | 104 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_debug.h | 69 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_error.def | 52 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_format.c | 40 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_input.c | 2532 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_output.c | 1568 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_output_node.c | 397 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_packet.h | 1470 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_pg.c | 30 | ||||
| -rw-r--r-- | src/plugins/sctp/sctp_timer.h | 29 | ||||
| -rw-r--r-- | src/plugins/sctp/test/test_sctp.py | 92 |
15 files changed, 0 insertions, 8618 deletions
diff --git a/src/plugins/sctp/CMakeLists.txt b/src/plugins/sctp/CMakeLists.txt deleted file mode 100644 index 2916c62eca7..00000000000 --- a/src/plugins/sctp/CMakeLists.txt +++ /dev/null @@ -1,36 +0,0 @@ -# Copyright (c) 2019 Cisco and/or its affiliates. -# Licensed under the Apache License, Version 2.0 (the "License"); -# you may not use this file except in compliance with the License. -# You may obtain a copy of the License at: -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. - -add_vpp_plugin(sctp - SOURCES - sctp.c - sctp_api.c - sctp_pg.c - sctp_input.c - sctp_output.c - sctp_output_node.c - sctp_format.c - - API_FILES - sctp.api - - MULTIARCH_SOURCES - sctp_output_node.c - sctp_input.c - - INSTALL_HEADERS - sctp_error.def - sctp_packet.h - sctp_timer.h - sctp.h -) diff --git a/src/plugins/sctp/sctp.api b/src/plugins/sctp/sctp.api deleted file mode 100644 index 22d7d6bb5d6..00000000000 --- a/src/plugins/sctp/sctp.api +++ /dev/null @@ -1,50 +0,0 @@ -/* - * Copyright (c) 2018 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -option version = "2.0.0"; - -import "vnet/ip/ip_types.api"; - -/** \brief Configure SCTP source addresses, for active-open SCTP sessions - - SCTP src/dst ports are 16 bits - @param client_index - opaque cookie to identify the sender - @param context - sender context, to match reply w/ request - @param vrf_id - fib table / vrf id for local adjacencies - @param src_address - src address that SCTP will use for this sub-conn - @param dst_address - dst address that SCTP will use for this sub-conn -*/ -autoreply define sctp_add_src_dst_connection { - u32 client_index; - u32 context; - u32 vrf_id; - vl_api_address_t src_address; - vl_api_address_t dst_address; - }; - -autoreply define sctp_del_src_dst_connection { - u32 client_index; - u32 context; - u32 vrf_id; - vl_api_address_t src_address; - vl_api_address_t dst_address; - }; - -autoreply define sctp_config { - u32 client_index; - u32 context; - bool never_delay_sack; - bool never_bundle; - }; diff --git a/src/plugins/sctp/sctp.c b/src/plugins/sctp/sctp.c deleted file mode 100644 index 452b6bf22cc..00000000000 --- a/src/plugins/sctp/sctp.c +++ /dev/null @@ -1,1130 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <vnet/plugin/plugin.h> -#include <vpp/app/version.h> - -#include <sctp/sctp.h> -#include <sctp/sctp_debug.h> - -sctp_main_t sctp_main; - -static u32 -sctp_connection_bind (u32 session_index, transport_endpoint_t * tep) -{ - sctp_main_t *tm = &sctp_main; - sctp_connection_t *listener; - void *iface_ip; - u32 mtu = 1460; - - pool_get (tm->listener_pool, listener); - clib_memset (listener, 0, sizeof (*listener)); - - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx = - SCTP_PRIMARY_PATH_IDX; - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].c_c_index = - listener - tm->listener_pool; - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.lcl_port = tep->port; - - /* If we are provided a sw_if_index, bind using one of its IPs */ - if (ip_is_zero (&tep->ip, 1) && tep->sw_if_index != ENDPOINT_INVALID_INDEX) - { - if ((iface_ip = ip_interface_get_first_ip (tep->sw_if_index, - tep->is_ip4))) - ip_set (&tep->ip, iface_ip, tep->is_ip4); - } - ip_copy (&listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.lcl_ip, - &tep->ip, tep->is_ip4); - - if (tep->sw_if_index != ENDPOINT_INVALID_INDEX) - mtu = tep->is_ip4 ? vnet_sw_interface_get_mtu (vnet_get_main (), - tep->sw_if_index, - VNET_MTU_IP4) : - vnet_sw_interface_get_mtu (vnet_get_main (), tep->sw_if_index, - VNET_MTU_IP6); - - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU = mtu; - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.is_ip4 = tep->is_ip4; - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto = - TRANSPORT_PROTO_SCTP; - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].c_s_index = session_index; - listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.fib_index = - tep->fib_index; - listener->state = SCTP_STATE_CLOSED; - - sctp_connection_timers_init (listener); - - return listener->sub_conn[SCTP_PRIMARY_PATH_IDX].c_c_index; -} - -u32 -sctp_session_bind (u32 session_index, transport_endpoint_t * tep) -{ - return sctp_connection_bind (session_index, tep); -} - -static void -sctp_connection_unbind (u32 listener_index) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - sctp_connection_t *sctp_conn; - - sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index); - - /* Poison the entry */ - if (CLIB_DEBUG > 0) - clib_memset (sctp_conn, 0xFA, sizeof (*sctp_conn)); - - pool_put_index (tm->listener_pool, listener_index); -} - -u32 -sctp_session_unbind (u32 listener_index) -{ - sctp_connection_unbind (listener_index); - return 0; -} - -void -sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add) -{ - sctp_main_t *tm = &sctp_main; - if (is_ip4) - tm->punt_unknown4 = is_add; - else - tm->punt_unknown6 = is_add; -} - -static int -sctp_alloc_custom_local_endpoint (sctp_main_t * tm, ip46_address_t * lcl_addr, - u16 * lcl_port, u8 is_ip4) -{ - int index, port; - if (is_ip4) - { - index = tm->last_v4_address_rotor++; - if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses)) - tm->last_v4_address_rotor = 0; - lcl_addr->ip4.as_u32 = tm->ip4_src_addresses[index].as_u32; - } - else - { - index = tm->last_v6_address_rotor++; - if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses)) - tm->last_v6_address_rotor = 0; - clib_memcpy (&lcl_addr->ip6, &tm->ip6_src_addresses[index], - sizeof (ip6_address_t)); - } - port = transport_alloc_local_port (TRANSPORT_PROTO_SCTP, lcl_addr); - if (port < 1) - { - clib_warning ("Failed to allocate src port"); - return -1; - } - *lcl_port = port; - return 0; -} - -/** - * Initialize all connection timers as invalid - */ -void -sctp_connection_timers_init (sctp_connection_t * sctp_conn) -{ - int i, j; - - /* Set all to invalid */ - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - sctp_conn->sub_conn[i].RTO = SCTP_RTO_INIT; - - for (j = 0; j < SCTP_N_TIMERS; j++) - { - sctp_conn->sub_conn[i].timers[j] = SCTP_TIMER_HANDLE_INVALID; - } - } -} - -/** - * Stop all connection timers - */ -void -sctp_connection_timers_reset (sctp_connection_t * sctp_conn) -{ - int i, j; - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - for (j = 0; j < SCTP_N_TIMERS; j++) - sctp_timer_reset (sctp_conn, i, j); - } -} - -const char *sctp_fsm_states[] = { -#define _(sym, str) str, - foreach_sctp_fsm_state -#undef _ -}; - -u8 * -format_sctp_state (u8 * s, va_list * args) -{ - u32 state = va_arg (*args, u32); - - if (state < SCTP_N_STATES) - s = format (s, "%s", sctp_fsm_states[state]); - else - s = format (s, "UNKNOWN (%d (0x%x))", state, state); - return s; -} - -u8 * -format_sctp_connection_id (u8 * s, va_list * args) -{ - sctp_connection_t *sctp_conn = va_arg (*args, sctp_connection_t *); - if (!sctp_conn) - return s; - - u8 i; - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (i > 0 && sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN) - continue; - if (sctp_conn->sub_conn[i].connection.is_ip4) - { - s = format (s, "[#%d][%s] %U:%d->%U:%d", - sctp_conn->sub_conn[i].connection.thread_index, - "S", - format_ip4_address, - &sctp_conn->sub_conn[i].connection.lcl_ip.ip4, - clib_net_to_host_u16 (sctp_conn->sub_conn[i]. - connection.lcl_port), - format_ip4_address, - &sctp_conn->sub_conn[i].connection.rmt_ip.ip4, - clib_net_to_host_u16 (sctp_conn->sub_conn[i]. - connection.rmt_port)); - } - else - { - s = format (s, "[#%d][%s] %U:%d->%U:%d", - sctp_conn->sub_conn[i].connection.thread_index, - "S", - format_ip6_address, - &sctp_conn->sub_conn[i].connection.lcl_ip.ip6, - clib_net_to_host_u16 (sctp_conn->sub_conn[i]. - connection.lcl_port), - format_ip6_address, - &sctp_conn->sub_conn[i].connection.rmt_ip.ip6, - clib_net_to_host_u16 (sctp_conn->sub_conn[i]. - connection.rmt_port)); - } - } - return s; -} - -u8 * -format_sctp_connection (u8 * s, va_list * args) -{ - sctp_connection_t *sctp_conn = va_arg (*args, sctp_connection_t *); - u32 verbose = va_arg (*args, u32); - - if (!sctp_conn) - return s; - s = format (s, "%-50U", format_sctp_connection_id, sctp_conn); - if (verbose) - { - s = format (s, "%-15U", format_sctp_state, sctp_conn->state); - if (verbose > 1) - s = format (s, "\n"); - } - - return s; -} - -/** - * Initialize connection send variables. - */ -void -sctp_init_snd_vars (sctp_connection_t * sctp_conn) -{ - u32 time_now; - /* - * We use the time to randomize iss and for setting up the initial - * timestamp. Make sure it's updated otherwise syn and ack in the - * handshake may make it look as if time has flown in the opposite - * direction for us. - */ - - sctp_set_time_now (vlib_get_thread_index ()); - time_now = sctp_time_now (); - - sctp_conn->local_initial_tsn = random_u32 (&time_now); - sctp_conn->last_unacked_tsn = sctp_conn->local_initial_tsn; - sctp_conn->next_tsn = sctp_conn->local_initial_tsn + 1; - - sctp_conn->remote_initial_tsn = 0x0; - sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn; -} - -always_inline sctp_connection_t * -sctp_sub_connection_add (u8 thread_index) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - sctp_connection_t *sctp_conn = tm->connections[thread_index]; - - u8 subconn_idx = sctp_next_avail_subconn (sctp_conn); - - ASSERT (subconn_idx < MAX_SCTP_CONNECTIONS); - - sctp_conn->sub_conn[subconn_idx].connection.c_index = - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.c_index; - sctp_conn->sub_conn[subconn_idx].connection.thread_index = thread_index; - sctp_conn->sub_conn[subconn_idx].subconn_idx = subconn_idx; - - return sctp_conn; -} - -u8 -sctp_sub_connection_add_ip4 (vlib_main_t * vm, - ip4_address_t * lcl_addr, - ip4_address_t * rmt_addr) -{ - sctp_connection_t *sctp_conn = sctp_sub_connection_add (vm->thread_index); - - u8 subconn_idx = sctp_next_avail_subconn (sctp_conn); - - if (subconn_idx == MAX_SCTP_CONNECTIONS) - return SCTP_ERROR_MAX_CONNECTIONS; - - clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.lcl_ip, - &lcl_addr, sizeof (lcl_addr)); - - clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.rmt_ip, - &rmt_addr, sizeof (rmt_addr)); - - sctp_conn->forming_association_changed = 1; - - return SCTP_ERROR_NONE; -} - -u8 -sctp_sub_connection_del_ip4 (ip4_address_t * lcl_addr, - ip4_address_t * rmt_addr) -{ - sctp_main_t *sctp_main = vnet_get_sctp_main (); - - u32 thread_idx = vlib_get_thread_index (); - u8 i; - - ASSERT (thread_idx == 0); - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - sctp_connection_t *sctp_conn = sctp_main->connections[thread_idx]; - sctp_sub_connection_t *sub_conn = - &sctp_main->connections[thread_idx]->sub_conn[i]; - ip46_address_t *lcl_ip = - &sctp_main->connections[thread_idx]->sub_conn[i].connection.lcl_ip; - ip46_address_t *rmt_ip = - &sctp_main->connections[thread_idx]->sub_conn[i].connection.rmt_ip; - - if (!sub_conn->connection.is_ip4) - continue; - if (lcl_ip->ip4.as_u32 == lcl_addr->as_u32 && - rmt_ip->ip4.as_u32 == rmt_addr->as_u32) - { - sub_conn->state = SCTP_SUBCONN_STATE_DOWN; - sctp_conn->forming_association_changed = 1; - break; - } - } - return SCTP_ERROR_NONE; -} - -u8 -sctp_sub_connection_add_ip6 (vlib_main_t * vm, - ip6_address_t * lcl_addr, - ip6_address_t * rmt_addr) -{ - sctp_connection_t *sctp_conn = sctp_sub_connection_add (vm->thread_index); - - u8 subconn_idx = sctp_next_avail_subconn (sctp_conn); - - if (subconn_idx == MAX_SCTP_CONNECTIONS) - return SCTP_ERROR_MAX_CONNECTIONS; - - clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.lcl_ip, - &lcl_addr, sizeof (lcl_addr)); - - clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.rmt_ip, - &rmt_addr, sizeof (rmt_addr)); - - sctp_conn->forming_association_changed = 1; - - return SCTP_ERROR_NONE; -} - -u8 -sctp_sub_connection_del_ip6 (ip6_address_t * lcl_addr, - ip6_address_t * rmt_addr) -{ - sctp_main_t *sctp_main = vnet_get_sctp_main (); - - u32 thread_idx = vlib_get_thread_index (); - u8 i; - - ASSERT (thread_idx == 0); - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - sctp_connection_t *sctp_conn = sctp_main->connections[thread_idx]; - sctp_sub_connection_t *sub_conn = - &sctp_main->connections[thread_idx]->sub_conn[i]; - ip46_address_t *lcl_ip = - &sctp_main->connections[thread_idx]->sub_conn[i].connection.lcl_ip; - ip46_address_t *rmt_ip = - &sctp_main->connections[thread_idx]->sub_conn[i].connection.rmt_ip; - - if (!sub_conn->connection.is_ip4) - continue; - if ((lcl_ip->ip6.as_u64[0] == lcl_addr->as_u64[0] - && lcl_ip->ip6.as_u64[1] == lcl_addr->as_u64[1]) - && (rmt_ip->ip6.as_u64[0] == rmt_addr->as_u64[0] - && rmt_ip->ip6.as_u64[1] == rmt_addr->as_u64[1])) - { - sub_conn->state = SCTP_SUBCONN_STATE_DOWN; - sctp_conn->forming_association_changed = 1; - break; - } - } - return SCTP_ERROR_NONE; -} - -u8 -sctp_configure (sctp_user_configuration_t config) -{ - sctp_main_t *sctp_main = vnet_get_sctp_main (); - - u32 thread_idx = vlib_get_thread_index (); - - sctp_main->connections[thread_idx]->conn_config.never_delay_sack = - config.never_delay_sack; - sctp_main->connections[thread_idx]->conn_config.never_bundle = - config.never_bundle; - - return 0; -} - -sctp_connection_t * -sctp_connection_new (u8 thread_index) -{ - sctp_main_t *sctp_main = vnet_get_sctp_main (); - sctp_connection_t *sctp_conn; - - pool_get (sctp_main->connections[thread_index], sctp_conn); - clib_memset (sctp_conn, 0, sizeof (*sctp_conn)); - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx = - SCTP_PRIMARY_PATH_IDX; - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_c_index = - sctp_conn - sctp_main->connections[thread_index]; - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_thread_index = thread_index; - sctp_conn->local_tag = 0; - - return sctp_conn; -} - -sctp_connection_t * -sctp_half_open_connection_new (u8 thread_index) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - sctp_connection_t *sctp_conn = 0; - ASSERT (vlib_get_thread_index () == 0); - pool_get (tm->half_open_connections, sctp_conn); - clib_memset (sctp_conn, 0, sizeof (*sctp_conn)); - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_c_index = - sctp_conn - tm->half_open_connections; - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx = - SCTP_PRIMARY_PATH_IDX; - return sctp_conn; -} - -static inline int -sctp_connection_open (transport_endpoint_cfg_t * rmt) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - sctp_connection_t *sctp_conn; - ip46_address_t lcl_addr; - u16 lcl_port; - uword thread_id; - u32 mtu = 1460; - int rv; - - u8 idx = SCTP_PRIMARY_PATH_IDX; - - /* - * Allocate local endpoint - */ - if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses)) - || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses))) - rv = sctp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port, - rmt->is_ip4); - else - rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_SCTP, - rmt, &lcl_addr, &lcl_port); - - if (rv) - return -1; - - /* - * Create connection and send INIT CHUNK - */ - thread_id = vlib_get_thread_index (); - ASSERT (thread_id == 0); - - clib_spinlock_lock_if_init (&tm->half_open_lock); - sctp_conn = sctp_half_open_connection_new (thread_id); - if (rmt->peer.sw_if_index != ENDPOINT_INVALID_INDEX) - mtu = rmt->is_ip4 ? vnet_sw_interface_get_mtu (vnet_get_main (), - rmt->peer.sw_if_index, - VNET_MTU_IP4) : - vnet_sw_interface_get_mtu (vnet_get_main (), rmt->peer.sw_if_index, - VNET_MTU_IP6); - sctp_conn->sub_conn[idx].PMTU = mtu; - - transport_connection_t *trans_conn = &sctp_conn->sub_conn[idx].connection; - ip_copy (&trans_conn->rmt_ip, &rmt->ip, rmt->is_ip4); - ip_copy (&trans_conn->lcl_ip, &lcl_addr, rmt->is_ip4); - sctp_conn->sub_conn[idx].subconn_idx = idx; - trans_conn->rmt_port = rmt->port; - trans_conn->lcl_port = clib_host_to_net_u16 (lcl_port); - trans_conn->is_ip4 = rmt->is_ip4; - trans_conn->proto = TRANSPORT_PROTO_SCTP; - trans_conn->fib_index = rmt->fib_index; - - sctp_connection_timers_init (sctp_conn); - /* The other connection vars will be initialized after INIT_ACK chunk received */ - sctp_init_snd_vars (sctp_conn); - - sctp_send_init (sctp_conn); - - clib_spinlock_unlock_if_init (&tm->half_open_lock); - - return sctp_conn->sub_conn[idx].connection.c_index; -} - -/** - * Cleans up connection state. - * - * No notifications. - */ -void -sctp_connection_cleanup (sctp_connection_t * sctp_conn) -{ - sctp_main_t *tm = &sctp_main; - u8 i; - - /* Cleanup local endpoint if this was an active connect */ - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - transport_endpoint_cleanup (TRANSPORT_PROTO_SCTP, - &sctp_conn->sub_conn[i].connection.lcl_ip, - sctp_conn->sub_conn[i].connection.lcl_port); - - int thread_index = - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.thread_index; - - /* Make sure all timers are cleared */ - sctp_connection_timers_reset (sctp_conn); - - /* Poison the entry */ - if (CLIB_DEBUG > 0) - clib_memset (sctp_conn, 0xFA, sizeof (*sctp_conn)); - pool_put (tm->connections[thread_index], sctp_conn); -} - -int -sctp_session_open (transport_endpoint_cfg_t * tep) -{ - return sctp_connection_open (tep); -} - -u16 -sctp_check_outstanding_data_chunks (sctp_connection_t * sctp_conn) -{ - u8 i; - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN) - continue; - - if (sctp_conn->sub_conn[i].is_retransmitting == 1 || - sctp_conn->sub_conn[i].enqueue_state != SCTP_ERROR_ENQUEUED) - { - SCTP_DBG_OUTPUT - ("Connection %u has still DATA to be enqueued inboud / outboud", - sctp_conn->sub_conn[i].connection.c_index); - return 1; - } - - } - return 0; /* Indicates no more data to be read/sent */ -} - -void -sctp_connection_close (sctp_connection_t * sctp_conn) -{ - SCTP_DBG ("Closing connection %u...", - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.c_index); - - sctp_conn->state = SCTP_STATE_SHUTDOWN_PENDING; - - sctp_send_shutdown (sctp_conn); -} - -void -sctp_session_close (u32 conn_index, u32 thread_index) -{ - ASSERT (thread_index == 0); - - sctp_connection_t *sctp_conn = - sctp_connection_get (conn_index, thread_index); - if (sctp_conn != NULL) - sctp_connection_close (sctp_conn); -} - -void -sctp_session_cleanup (u32 conn_index, u32 thread_index) -{ - sctp_connection_t *sctp_conn = - sctp_connection_get (conn_index, thread_index); - - if (sctp_conn != NULL) - { - sctp_connection_timers_reset (sctp_conn); - /* Wait for the session tx events to clear */ - sctp_conn->state = SCTP_STATE_CLOSED; - } -} - -/** - * Compute maximum segment size for session layer. - */ -u16 -sctp_session_send_mss (transport_connection_t * trans_conn) -{ - sctp_connection_t *sctp_conn = - sctp_get_connection_from_transport (trans_conn); - - if (sctp_conn == NULL) - { - SCTP_DBG ("sctp_conn == NULL"); - return 0; - } - - update_cwnd (sctp_conn); - update_smallest_pmtu_idx (sctp_conn); - - u8 idx = sctp_data_subconn_select (sctp_conn); - return sctp_conn->sub_conn[idx].cwnd; -} - -u16 -sctp_snd_space (sctp_connection_t * sctp_conn) -{ - /* RFC 4096 Section 6.1; point (A) */ - if (sctp_conn->peer_rwnd == 0) - return 0; - - u8 idx = sctp_data_subconn_select (sctp_conn); - - u32 available_wnd = - clib_min (sctp_conn->peer_rwnd, sctp_conn->sub_conn[idx].cwnd); - int flight_size = (int) (sctp_conn->next_tsn - sctp_conn->last_unacked_tsn); - - if (available_wnd <= flight_size) - return 0; - - /* Finally, let's subtract the DATA chunk headers overhead */ - return available_wnd - - flight_size - - sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_full_hdr_t); -} - -/** - * Compute TX window session is allowed to fill. - */ -u32 -sctp_session_send_space (transport_connection_t * trans_conn) -{ - sctp_connection_t *sctp_conn = - sctp_get_connection_from_transport (trans_conn); - - return sctp_snd_space (sctp_conn); -} - -transport_connection_t * -sctp_session_get_transport (u32 conn_index, u32 thread_index) -{ - sctp_connection_t *sctp_conn = - sctp_connection_get (conn_index, thread_index); - - if (PREDICT_TRUE (sctp_conn != NULL)) - return &sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection; - - return NULL; -} - -transport_connection_t * -sctp_session_get_listener (u32 listener_index) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - sctp_connection_t *sctp_conn; - sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index); - return &sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection; -} - -u8 * -format_sctp_session (u8 * s, va_list * args) -{ - u32 tci = va_arg (*args, u32); - u32 thread_index = va_arg (*args, u32); - u32 verbose = va_arg (*args, u32); - sctp_connection_t *tc; - - tc = sctp_connection_get (tci, thread_index); - if (tc) - s = format (s, "%U", format_sctp_connection, tc, verbose); - else - s = format (s, "empty\n"); - return s; -} - -u8 * -format_sctp_listener_session (u8 * s, va_list * args) -{ - u32 tci = va_arg (*args, u32); - u32 __clib_unused thread_index = va_arg (*args, u32); - sctp_connection_t *tc = sctp_listener_get (tci); - return format (s, "%U", format_sctp_connection_id, tc); -} - -void -sctp_expired_timers_cb (u32 conn_index, u32 timer_id) -{ - sctp_connection_t *sctp_conn; - - SCTP_DBG ("%s expired", sctp_timer_to_string (timer_id)); - - sctp_conn = sctp_connection_get (conn_index, vlib_get_thread_index ()); - /* note: the connection may have already disappeared */ - if (PREDICT_FALSE (sctp_conn == 0)) - return; - - if (sctp_conn->sub_conn[conn_index].unacknowledged_hb > - SCTP_PATH_MAX_RETRANS) - { - // The remote-peer is considered to be unreachable hence shutting down - u8 i, total_subs_down = 1; - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN) - continue; - - u32 now = sctp_time_now (); - if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL)) - { - total_subs_down += 1; - sctp_conn->sub_conn[i].state = SCTP_SUBCONN_STATE_DOWN; - } - } - - if (total_subs_down == MAX_SCTP_CONNECTIONS) - { - /* Start cleanup. App wasn't notified yet so use delete notify as - * opposed to delete to cleanup session layer state. */ - session_transport_delete_notify (&sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection); - - sctp_connection_timers_reset (sctp_conn); - - sctp_connection_cleanup (sctp_conn); - } - return; - } - - switch (timer_id) - { - case SCTP_TIMER_T1_INIT: - sctp_send_init (sctp_conn); - break; - case SCTP_TIMER_T1_COOKIE: - sctp_send_cookie_echo (sctp_conn); - break; - case SCTP_TIMER_T2_SHUTDOWN: - sctp_send_shutdown (sctp_conn); - break; - case SCTP_TIMER_T3_RXTX: - sctp_timer_reset (sctp_conn, conn_index, timer_id); - sctp_conn->flags |= SCTP_CONN_RECOVERY; - sctp_data_retransmit (sctp_conn); - break; - case SCTP_TIMER_T4_HEARTBEAT: - sctp_timer_reset (sctp_conn, conn_index, timer_id); - goto heartbeat; - } - return; - -heartbeat: - sctp_send_heartbeat (sctp_conn); -} - -static void -sctp_expired_timers_dispatch (u32 * expired_timers) -{ - int i; - u32 connection_index, timer_id; - - for (i = 0; i < vec_len (expired_timers); i++) - { - /* Get session index and timer id */ - connection_index = expired_timers[i] & 0x0FFFFFFF; - timer_id = expired_timers[i] >> 28; - - SCTP_DBG ("Expired timer ID: %u", timer_id); - - /* Handle expiration */ - sctp_expired_timers_cb (connection_index, timer_id); - } -} - -void -sctp_initialize_timer_wheels (sctp_main_t * tm) -{ - tw_timer_wheel_16t_2w_512sl_t *tw; - /* *INDENT-OFF* */ - foreach_vlib_main (({ - tw = &tm->timer_wheels[ii]; - tw_timer_wheel_init_16t_2w_512sl (tw, sctp_expired_timers_dispatch, - 100e-3 /* timer period 100ms */ , ~0); - tw->last_run_time = vlib_time_now (this_vlib_main); - })); - /* *INDENT-ON* */ -} - -clib_error_t * -sctp_main_enable (vlib_main_t * vm) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - vlib_thread_main_t *vtm = vlib_get_thread_main (); - clib_error_t *error = 0; - u32 num_threads; - int thread; - sctp_connection_t *sctp_conn __attribute__ ((unused)); - u32 preallocated_connections_per_thread; - - if ((error = vlib_call_init_function (vm, ip_main_init))) - return error; - if ((error = vlib_call_init_function (vm, ip4_lookup_init))) - return error; - if ((error = vlib_call_init_function (vm, ip6_lookup_init))) - return error; - - /* - * Registrations - */ - - ip4_register_protocol (IP_PROTOCOL_SCTP, sctp4_input_node.index); - ip6_register_protocol (IP_PROTOCOL_SCTP, sctp6_input_node.index); - - /* - * Initialize data structures - */ - - num_threads = 1 /* main thread */ + vtm->n_threads; - vec_validate (tm->connections, num_threads - 1); - - /* - * Preallocate connections. Assume that thread 0 won't - * use preallocated threads when running multi-core - */ - if (num_threads == 1) - { - thread = 0; - preallocated_connections_per_thread = tm->preallocated_connections; - } - else - { - thread = 1; - preallocated_connections_per_thread = - tm->preallocated_connections / (num_threads - 1); - } - for (; thread < num_threads; thread++) - { - if (preallocated_connections_per_thread) - pool_init_fixed (tm->connections[thread], - preallocated_connections_per_thread); - } - - /* Initialize per worker thread tx buffers (used for control messages) */ - vec_validate (tm->tx_buffers, num_threads - 1); - - /* Initialize timer wheels */ - vec_validate (tm->timer_wheels, num_threads - 1); - sctp_initialize_timer_wheels (tm); - - /* Initialize clocks per tick for SCTP timestamp. Used to compute - * monotonically increasing timestamps. */ - tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock - / SCTP_TSTAMP_RESOLUTION; - - if (num_threads > 1) - { - clib_spinlock_init (&tm->half_open_lock); - } - - vec_validate (tm->tx_frames[0], num_threads - 1); - vec_validate (tm->tx_frames[1], num_threads - 1); - vec_validate (tm->ip_lookup_tx_frames[0], num_threads - 1); - vec_validate (tm->ip_lookup_tx_frames[1], num_threads - 1); - - tm->bytes_per_buffer = vlib_buffer_get_default_data_size (vm); - - vec_validate (tm->time_now, num_threads - 1); - return error; -} - -clib_error_t * -sctp_transport_enable_disable (vlib_main_t * vm, u8 is_en) -{ - if (is_en) - { - if (sctp_main.is_enabled) - return 0; - - return sctp_main_enable (vm); - } - else - { - sctp_main.is_enabled = 0; - } - - return 0; -} - -transport_connection_t * -sctp_half_open_session_get_transport (u32 conn_index) -{ - sctp_connection_t *sctp_conn = sctp_half_open_connection_get (conn_index); - return &sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection; -} - -u8 * -format_sctp_half_open (u8 * s, va_list * args) -{ - u32 tci = va_arg (*args, u32); - u32 __clib_unused thread_index = va_arg (*args, u32); - sctp_connection_t *sctp_conn = sctp_half_open_connection_get (tci); - return format (s, "%U", format_sctp_connection_id, sctp_conn); -} - -void -sctp_update_time (f64 now, u8 thread_index) -{ - sctp_set_time_now (thread_index); - tw_timer_expire_timers_16t_2w_512sl (&sctp_main.timer_wheels[thread_index], - now); - sctp_flush_frames_to_output (thread_index); -} - -/* *INDENT-OFF* */ -static const transport_proto_vft_t sctp_proto = { - .enable = sctp_transport_enable_disable, - .start_listen = sctp_session_bind, - .stop_listen = sctp_session_unbind, - .connect = sctp_session_open, - .close = sctp_session_close, - .cleanup = sctp_session_cleanup, - .push_header = sctp_push_header, - .send_mss = sctp_session_send_mss, - .send_space = sctp_session_send_space, - .update_time = sctp_update_time, - .get_connection = sctp_session_get_transport, - .get_listener = sctp_session_get_listener, - .get_half_open = sctp_half_open_session_get_transport, - .format_connection = format_sctp_session, - .format_listener = format_sctp_listener_session, - .format_half_open = format_sctp_half_open, - .transport_options = { - .tx_type = TRANSPORT_TX_DEQUEUE, - .service_type = TRANSPORT_SERVICE_VC, - }, -}; -/* *INDENT-ON* */ - -clib_error_t * -sctp_enable_disable (vlib_main_t * vm, u8 is_en) -{ - sctp_main_t *sm = vnet_get_sctp_main (); - ip_main_t *im = &ip_main; - ip_protocol_info_t *pi; - vlib_node_t *node; - - if (!sm->is_init && is_en) - { - node = vlib_get_node_by_name (vm, (u8 *) "sctp4-established"); - sm->sctp4_established_phase_node_index = node->index; - - node = vlib_get_node_by_name (vm, (u8 *) "sctp6-established"); - sm->sctp6_established_phase_node_index = node->index; - - sm->is_init = 1; - - /* Register with IP for header parsing */ - pi = ip_get_protocol_info (im, IP_PROTOCOL_SCTP); - if (pi == 0) - return clib_error_return (0, "SCTP protocol info AWOL"); - pi->format_header = format_sctp_header; - pi->unformat_pg_edit = unformat_pg_sctp_header; - - /* Register as transport with session layer */ - transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto, - FIB_PROTOCOL_IP4, sctp4_output_node.index); - transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto, - FIB_PROTOCOL_IP6, sctp6_output_node.index); - } - - sctp_transport_enable_disable (vm, is_en); - return 0; -} - -static u8 * -sctp_format_buffer_opaque_helper (const vlib_buffer_t * b, u8 * s) -{ - sctp_buffer_opaque_t *o = sctp_buffer_opaque (b); - - s = format (s, - "sctp.connection_index: %d, sctp.sid: %d, sctp.ssn: %d, " - "sctp.tsn: %d, sctp.hdr_offset: %d", - o->sctp.connection_index, - (u32) (o->sctp.sid), - (u32) (o->sctp.ssn), - (u32) (o->sctp.tsn), (u32) (o->sctp.hdr_offset)); - vec_add1 (s, '\n'); - - s = format - (s, "sctp.data_offset: %d, sctp.data_len: %d, sctp.subconn_idx: %d, " - "sctp.flags: 0x%x", - (u32) (o->sctp.data_offset), - (u32) (o->sctp.data_len), - (u32) (o->sctp.subconn_idx), (u32) (o->sctp.flags)); - vec_add1 (s, '\n'); - return s; -} - -clib_error_t * -sctp_init (vlib_main_t * vm) -{ - sctp_main_t *sm = vnet_get_sctp_main (); - - /* Session layer, and by implication SCTP, are disabled by default */ - sm->is_enabled = 0; - sm->is_init = 0; - - /* initialize binary API */ - sctp_plugin_api_hookup (vm); - - vnet_register_format_buffer_opaque_helper - (sctp_format_buffer_opaque_helper); - return 0; -} - -VLIB_INIT_FUNCTION (sctp_init); - -static clib_error_t * -show_sctp_punt_fn (vlib_main_t * vm, unformat_input_t * input, - vlib_cli_command_t * cmd_arg) -{ - sctp_main_t *tm = &sctp_main; - if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - return clib_error_return (0, "unknown input `%U'", format_unformat_error, - input); - vlib_cli_output (vm, "IPv4 UDP punt: %s", - tm->punt_unknown4 ? "enabled" : "disabled"); - vlib_cli_output (vm, "IPv6 UDP punt: %s", - tm->punt_unknown6 ? "enabled" : "disabled"); - return 0; -} -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (show_tcp_punt_command, static) = -{ - .path = "show sctp punt", - .short_help = "show sctp punt", - .function = show_sctp_punt_fn, -}; -/* *INDENT-ON* */ - -static clib_error_t * -sctp_fn (vlib_main_t * vm, unformat_input_t * input, - vlib_cli_command_t * cmd_arg) -{ - unformat_input_t _line_input, *line_input = &_line_input; - clib_error_t *error; - u8 is_en; - - if (!unformat_user (input, unformat_line_input, line_input)) - return clib_error_return (0, "expected enable | disable"); - - while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (line_input, "enable")) - is_en = 1; - else if (unformat (line_input, "disable")) - is_en = 0; - else - { - error = clib_error_return (0, "unknown input `%U'", - format_unformat_error, line_input); - unformat_free (line_input); - return error; - } - } - - unformat_free (line_input); - - return sctp_enable_disable (vm, is_en); -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (show_sctp_command, static) = -{ - .path = "sctp", - .short_help = "sctp [enable | disable]", - .function = sctp_fn, -}; - -/* *INDENT-OFF* */ -VLIB_PLUGIN_REGISTER () = -{ - .version = VPP_BUILD_VER, - .description = "Stream Control Transmission Protocol (SCTP)", - .default_disabled = 1, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp.h b/src/plugins/sctp/sctp.h deleted file mode 100644 index aa2409ecce8..00000000000 --- a/src/plugins/sctp/sctp.h +++ /dev/null @@ -1,1019 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef included_vnet_sctp_h -#define included_vnet_sctp_h - -#include <vnet/vnet.h> -#include <vnet/ip/ip.h> -#include <sctp/sctp_timer.h> -#include <sctp/sctp_packet.h> -#include <vnet/session/transport.h> -#include <vnet/session/session.h> - -/* SCTP buffer opaque definition */ -typedef struct -{ - struct - { - u32 connection_index; - u16 sid; /**< Stream ID */ - u16 ssn; /**< Stream Sequence Number */ - u32 tsn; /**< Transmission Sequence Number */ - u16 hdr_offset; /**< offset relative to ip hdr */ - u16 data_offset; /**< offset relative to ip hdr */ - u16 data_len; /**< data len */ - u8 subconn_idx; /**< index of the sub_connection being used */ - u8 flags; - } sctp; -} sctp_buffer_opaque_t; - -STATIC_ASSERT (sizeof (sctp_buffer_opaque_t) <= - STRUCT_SIZE_OF (vnet_buffer_opaque_t, unused), - "sctp_buffer_opaque_t too large for vnet_buffer_opaque_t"); - -#define sctp_buffer_opaque(b) \ - ((sctp_buffer_opaque_t *)((u8 *)((b)->opaque) + \ -STRUCT_OFFSET_OF (vnet_buffer_opaque_t, unused))) - - -/* SCTP timers */ -#define foreach_sctp_timer \ - _(T1_INIT, "T1_INIT") \ - _(T1_COOKIE, "T1_COOKIE") \ - _(T2_SHUTDOWN, "T2_SHUTDOWN") \ - _(T3_RXTX, "T3_RXTX") \ - _(T4_HEARTBEAT, "T4_HB") \ - _(T5_SHUTDOWN_GUARD, "T5_SHUTDOWN_GUARD") - -typedef enum _sctp_timers -{ -#define _(sym, str) SCTP_TIMER_##sym, - foreach_sctp_timer -#undef _ - SCTP_N_TIMERS -} sctp_timers_e; - -#define SCTP_TIMER_HANDLE_INVALID ((u32) ~0) - -always_inline char * -sctp_timer_to_string (u8 timer_id) -{ - switch (timer_id) - { - case SCTP_TIMER_T1_INIT: - return "SCTP_TIMER_T1_INIT"; - case SCTP_TIMER_T1_COOKIE: - return "SCTP_TIMER_T1_COOKIE"; - case SCTP_TIMER_T2_SHUTDOWN: - return "SCTP_TIMER_T2_SHUTDOWN"; - case SCTP_TIMER_T3_RXTX: - return "SCTP_TIMER_T3_RXTX"; - case SCTP_TIMER_T4_HEARTBEAT: - return "SCTP_TIMER_T4_HEARTBEAT"; - case SCTP_TIMER_T5_SHUTDOWN_GUARD: - return "SCTP_TIMER_T5_SHUTDOWN_GUARD"; - } - return NULL; -} - -typedef enum _sctp_error -{ -#define sctp_error(n,s) SCTP_ERROR_##n, -#include <sctp/sctp_error.def> -#undef sctp_error - SCTP_N_ERROR, -} sctp_error_t; - -#define NO_FLAG 0 - -#define IS_T_BIT_SET(var) ((var) & (1)) -#define IS_E_BIT_SET(var) ((var) & (1)) -#define IS_B_BIT_SET(var) ((var) & (1<<1)) -#define IS_U_BIT_SET(var) ((var) & (1<<2)) - -#define MAX_SCTP_CONNECTIONS 8 -#define SCTP_PRIMARY_PATH_IDX 0 - -#if (VLIB_BUFFER_TRACE_TRAJECTORY) -#define sctp_trajectory_add_start(b, start) \ -{ \ - (*vlib_buffer_trace_trajectory_cb) (b, start); \ -} -#else -#define sctp_trajectory_add_start(b, start) -#endif - -enum _sctp_subconn_state -{ - SCTP_SUBCONN_STATE_DOWN = 0, - SCTP_SUBCONN_STATE_UP, - SCTP_SUBCONN_STATE_ALLOW_HB, - SCTP_SUBCONN_AWAITING_SACK, - SCTP_SUBCONN_SACK_RECEIVED -}; - -#define SCTP_INITIAL_SSHTRESH 65535 -typedef struct _sctp_sub_connection -{ - transport_connection_t connection; /**< Common transport data. First! */ - - u8 subconn_idx; /**< This indicates the position of this sub-connection in the super-set container of connections pool */ - u32 error_count; /**< The current error count for this destination. */ - u32 error_threshold; /**< Current error threshold for this destination, - i.e. what value marks the destination down if error count reaches this value. */ - u32 cwnd; /**< Congestion control window (cwnd, in bytes), which is adjusted by - the sender based on observed network conditions. */ - u32 ssthresh; /**< Slow-start threshold (in bytes), which is used by the - sender to distinguish slow-start and congestion avoidance phases. */ - - u64 rtt_ts; /**< USED to hold the timestamp of when the packet has been sent */ - - u32 RTO; /**< The current retransmission timeout value. */ - u64 SRTT; /**< The current smoothed round-trip time. */ - f64 RTTVAR; /**< The current RTT variation. */ - - u32 partially_acked_bytes; /**< The tracking method for increase of cwnd when in - congestion avoidance mode (see Section 7.2.2).*/ - - u8 state; /**< The current state of this destination, i.e., DOWN, UP, ALLOW-HB, NO-HEARTBEAT, etc. */ - - u16 PMTU; /**< The current known path MTU. */ - - u32 timers[SCTP_N_TIMERS]; /**< A timer used by each destination. */ - - u8 RTO_pending; /**< A flag used to track if one of the DATA chunks sent to - this address is currently being used to compute an RTT. - If this flag is 0, the next DATA chunk sent to this destination - should be used to compute an RTT and this flag should be set. - Every time the RTT calculation completes (i.e., the DATA chunk is SACK'd), - clear this flag. */ - - u64 last_seen; /**< The time to which this destination was last sent a packet to. - This can be used to determine if a HEARTBEAT is needed. */ - - u64 last_data_ts; /**< Used to hold the timestamp value of last time we sent a DATA chunk */ - - u8 unacknowledged_hb; /**< Used to track how many unacknowledged heartbeats we had; - If more than SCTP_PATH_MAX_RETRANS then connection is considered unreachable. */ - - u8 is_retransmitting; /**< A flag (0 = no, 1 = yes) indicating whether the connection is retransmitting a previous packet */ - - u8 enqueue_state; /**< if set to 1 indicates that DATA is still being handled hence cannot shutdown this connection yet */ - -} sctp_sub_connection_t; - -typedef struct -{ - u32 a_rwnd; /**< Maximum segment size advertised */ - -} sctp_options_t; - -/* Useful macros to deal with the out_of_order_map (array of bit) */ -#define SET_BIT(A,k) ( A[(k/32)] |= (1 << (k%32)) ) -#define CLEAR_BIT(A,k) ( A[(k/32)] &= ~(1 << (k%32)) ) -#define TEST_BIT(A,k) ( A[(k/32)] & (1 << (k%32)) ) - -always_inline void -_bytes_swap (void *pv, size_t n) -{ - char *p = pv; - size_t lo, hi; - for (lo = 0, hi = n - 1; hi > lo; lo++, hi--) - { - char tmp = p[lo]; - p[lo] = p[hi]; - p[hi] = tmp; - } -} - -#define ENDIANESS_SWAP(x) _bytes_swap(&x, sizeof(x)); - -#define MAX_INFLIGHT_PACKETS 128 -#define MAX_ENQUEABLE_SACKS 2 - -/* This parameter indicates to the receiver how much increment in - * milliseconds the sender wishes the receiver to add to its default - * cookie life-span. - */ -#define SUGGESTED_COOKIE_LIFE_SPAN_INCREMENT 1000 - -typedef struct _sctp_user_configuration -{ - u8 never_delay_sack; - u8 never_bundle; - -} sctp_user_configuration_t; - -typedef struct _sctp_connection -{ - /** Required for pool_get_aligned */ - CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); - - sctp_sub_connection_t sub_conn[MAX_SCTP_CONNECTIONS]; /**< Common transport data. First! */ - sctp_user_configuration_t conn_config; /**< Allows tuning of some SCTP behaviors */ - - u8 state; /**< SCTP state as per sctp_state_t */ - u16 flags; /**< Chunk flag (see sctp_chunks_common_hdr_t) */ - - u32 local_tag; /**< INIT_TAG generated locally */ - u32 remote_tag; /**< INIT_TAG generated by the remote peer */ - - u32 local_initial_tsn; /**< Initial TSN generated locally */ - u32 remote_initial_tsn; /**< Initial TSN generated by the remote-peer */ - - u32 peer_cookie_life_span_increment; - - u32 overall_err_count; /**< The overall association error count. */ - u32 overall_err_treshold; /**< The threshold for this association that if the Overall Error Count - reaches will cause this association to be torn down. */ - - u8 init_retransmit_err; /**< Error counter for the INIT transmission phase */ - - u32 peer_rwnd; /**< Current calculated value of the peer's rwnd. */ - - u32 next_tsn; /**< The next TSN number to be assigned to a new DATA chunk. - This is sent in the INIT or INIT ACK chunk to the peer - and incremented each time a DATA chunk is assigned a - TSN (normally just prior to transmit or during - fragmentation). */ - - u32 last_unacked_tsn; /** < Last TSN number still unacked */ - u32 next_tsn_expected; /**< The next TSN number expected to be received. */ - - u32 last_rcvd_tsn; /**< This is the last TSN received in sequence. This value - is set initially by taking the peer's initial TSN, - received in the INIT or INIT ACK chunk, and - subtracting one from it. */ - - u32 out_of_order_map[MAX_INFLIGHT_PACKETS]; /**< An array of bits or bytes indicating which out-of-order - TSNs have been received (relative to the Last Rcvd TSN). - If no gaps exist, i.e., no out-of-order packets have been received, - this array will be set to all zero. */ - - u8 ack_state; /**< This flag indicates if the next received packet is set to be responded to with a SACK. - This is initialized to 0. When a packet is received it is incremented. - If this value reaches 2 or more, a SACK is sent and the value is reset to 0. - Note: This is used only when no DATA chunks are received out-of-order. - When DATA chunks are out-of-order, SACKs are not delayed (see Section 6). */ - - u8 smallest_PMTU_idx; /** The index of the sub-connection with the smallest PMTU discovered across all peer's transport addresses. */ - - u8 overall_sending_status; /**< 0 indicates first fragment of a user message - 1 indicates normal stream - 2 indicates last fragment of a user message */ - - u8 forming_association_changed; /**< This is a flag indicating whether the original association has been modified during - the life-span of the association itself. For instance, a new sub-connection might have been added. */ - - sctp_state_cookie_param_t cookie_param; /**< Temporary location to save cookie information; it can be used to - when timeout expires and sending again a COOKIE is require. */ - -} sctp_connection_t; - -typedef void (sctp_timer_expiration_handler) (u32 conn_index, u32 timer_id); - -sctp_connection_t *sctp_connection_new (u8 thread_index); - -u8 -sctp_sub_connection_add_ip4 (vlib_main_t * vm, - ip4_address_t * lcl_addr, - ip4_address_t * rmt_addr); - -u8 -sctp_sub_connection_add_ip6 (vlib_main_t * vm, - ip6_address_t * lcl_addr, - ip6_address_t * rmt_addr); - -u8 -sctp_sub_connection_del_ip4 (ip4_address_t * lcl_addr, - ip4_address_t * rmt_addr); - -u8 -sctp_sub_connection_del_ip6 (ip6_address_t * lcl_addr, - ip6_address_t * rmt_addr); - -u8 sctp_configure (sctp_user_configuration_t config); - -void sctp_connection_close (sctp_connection_t * sctp_conn); -void sctp_connection_cleanup (sctp_connection_t * sctp_conn); -void sctp_connection_del (sctp_connection_t * sctp_conn); - -u32 sctp_push_header (transport_connection_t * tconn, vlib_buffer_t * b); -void sctp_send_init (sctp_connection_t * sctp_conn); -void sctp_send_cookie_echo (sctp_connection_t * sctp_conn); -void sctp_send_shutdown (sctp_connection_t * sctp_conn); -void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b); -void sctp_send_shutdown_complete (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0); -void sctp_send_heartbeat (sctp_connection_t * sctp_conn); -void sctp_data_retransmit (sctp_connection_t * sctp_conn); -void sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, - u8 is_ip4); -void sctp_flush_frames_to_output (u8 thread_index); -void sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add); - -format_function_t format_sctp_state; - -u8 *format_sctp_connection_id (u8 * s, va_list * args); -u8 *format_sctp_connection (u8 * s, va_list * args); -u8 *format_sctp_scoreboard (u8 * s, va_list * args); -u8 *format_sctp_header (u8 * s, va_list * args); -u8 *format_sctp_tx_trace (u8 * s, va_list * args); -unformat_function_t unformat_pg_sctp_header; - -clib_error_t *sctp_init (vlib_main_t * vm); -void sctp_connection_timers_init (sctp_connection_t * sctp_conn); -void sctp_connection_timers_reset (sctp_connection_t * sctp_conn); -void sctp_init_snd_vars (sctp_connection_t * sctp_conn); -void sctp_init_mss (sctp_connection_t * sctp_conn); - -void sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, ip4_address_t * ip4_addr, - u8 add_ip4, ip6_address_t * ip6_addr, - u8 add_ip6); -void sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn, - u8 idx, vlib_buffer_t * b, - ip4_address_t * ip4_addr, - ip6_address_t * ip6_addr); -void sctp_prepare_abort_for_collision (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, - ip4_address_t * ip4_addr, - ip6_address_t * ip6_addr); -void sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, u8 err_cause); -void sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, u8 reuse_buffer); -void sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b); -void sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b); -void sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b); - -u16 sctp_check_outstanding_data_chunks (sctp_connection_t * sctp_conn); - -void sctp_api_reference (void); - -#define IP_PROTOCOL_SCTP 132 - -/** SSCTP FSM state definitions as per RFC4960. */ -#define foreach_sctp_fsm_state \ - _(CLOSED, "CLOSED") \ - _(COOKIE_WAIT, "COOKIE_WAIT") \ - _(COOKIE_ECHOED, "COOKIE_ECHOED") \ - _(ESTABLISHED, "ESTABLISHED") \ - _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \ - _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \ - _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \ - _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT") - -typedef enum _sctp_state -{ -#define _(sym, str) SCTP_STATE_##sym, - foreach_sctp_fsm_state -#undef _ - SCTP_N_STATES -} sctp_state_t; - -always_inline char * -sctp_state_to_string (u8 state) -{ - switch (state) - { - case SCTP_STATE_CLOSED: - return "SCTP_STATE_CLOSED"; - case SCTP_STATE_COOKIE_WAIT: - return "SCTP_STATE_COOKIE_WAIT"; - case SCTP_STATE_COOKIE_ECHOED: - return "SCTP_STATE_COOKIE_ECHOED"; - case SCTP_STATE_ESTABLISHED: - return "SCTP_STATE_ESTABLISHED"; - case SCTP_STATE_SHUTDOWN_PENDING: - return "SCTP_STATE_SHUTDOWN_PENDING"; - case SCTP_STATE_SHUTDOWN_SENT: - return "SCTP_STATE_SHUTDOWN_SENT"; - case SCTP_STATE_SHUTDOWN_RECEIVED: - return "SCTP_STATE_SHUTDOWN_RECEIVED"; - case SCTP_STATE_SHUTDOWN_ACK_SENT: - return "SCTP_STATE_SHUTDOWN_ACK_SENT"; - } - return NULL; -} - -always_inline char * -sctp_chunk_to_string (u8 type) -{ - switch (type) - { - case DATA: - return "DATA"; - case INIT: - return "INIT"; - case INIT_ACK: - return "INIT_ACK"; - case SACK: - return "SACK"; - case HEARTBEAT: - return "HEARTBEAT"; - case HEARTBEAT_ACK: - return "HEARTBEAT_ACK"; - case ABORT: - return "ABORT"; - case SHUTDOWN: - return "SHUTDOWN"; - case SHUTDOWN_ACK: - return "SHUTDOWN_ACK"; - case OPERATION_ERROR: - return "OPERATION_ERROR"; - case COOKIE_ECHO: - return "COOKIE_ECHO"; - case COOKIE_ACK: - return "COOKIE_ACK"; - case ECNE: - return "ECNE"; - case CWR: - return "CWR"; - case SHUTDOWN_COMPLETE: - return "SHUTDOWN_COMPLETE"; - } - return NULL; -} - -always_inline char * -sctp_optparam_type_to_string (u8 type) -{ - switch (type) - { - case SCTP_IPV4_ADDRESS_TYPE: - return "SCTP_IPV4_ADDRESS_TYPE"; - case SCTP_IPV6_ADDRESS_TYPE: - return "SCTP_IPV6_ADDRESS_TYPE"; - case SCTP_STATE_COOKIE_TYPE: - return "SCTP_STATE_COOKIE_TYPE"; - case SCTP_UNRECOGNIZED_TYPE: - return "SCTP_UNRECOGNIZED_TYPE"; - case SCTP_COOKIE_PRESERVATIVE_TYPE: - return "SCTP_COOKIE_PRESERVATIVE_TYPE"; - case SCTP_HOSTNAME_ADDRESS_TYPE: - return "SCTP_HOSTNAME_ADDRESS_TYPE"; - case SCTP_SUPPORTED_ADDRESS_TYPES: - return "SCTP_SUPPORTED_ADDRESS_TYPES"; - } - return NULL; -} - -#define SCTP_TICK 0.001 /**< SCTP tick period (s) */ -#define SHZ (u32) (1/SCTP_TICK) /**< SCTP tick frequency */ -#define SCTP_TSTAMP_RESOLUTION SCTP_TICK /**< Time stamp resolution */ - -/* As per RFC4960, page 83 */ -#define SCTP_RTO_INIT 3 * SHZ /* 3 seconds */ -#define SCTP_RTO_MIN 1 * SHZ /* 1 second */ -#define SCTP_RTO_MAX 60 * SHZ /* 60 seconds */ -#define SCTP_RTO_BURST 4 -#define SCTP_RTO_ALPHA 1/8 -#define SCTP_RTO_BETA 1/4 -#define SCTP_VALID_COOKIE_LIFE 60 * SHZ /* 60 seconds */ -#define SCTP_ASSOCIATION_MAX_RETRANS 10 // the overall connection -#define SCTP_PATH_MAX_RETRANS 5 // number of attempts per destination address -#define SCTP_MAX_INIT_RETRANS 8 // number of attempts -#define SCTP_HB_INTERVAL 30 * SHZ -#define SCTP_HB_MAX_BURST 1 -#define SCTP_DATA_IDLE_INTERVAL 15 * SHZ /* 15 seconds; the time-interval after which the connetion is considered IDLE */ -#define SCTP_TO_TIMER_TICK SCTP_TICK*10 /* Period for converting from SCTP_TICK */ - -#define SCTP_CONN_RECOVERY 1 << 1 -#define SCTP_FAST_RECOVERY 1 << 2 - -typedef struct _sctp_lookup_dispatch -{ - u8 next, error; -} sctp_lookup_dispatch_t; - -typedef struct _sctp_main -{ - /* Per-worker thread SCTP connection pools */ - sctp_connection_t **connections; - - /* Pool of listeners. */ - sctp_connection_t *listener_pool; - - /** Dispatch table by state and flags */ - sctp_lookup_dispatch_t dispatch_table[SCTP_N_STATES][64]; - - u8 log2_tstamp_clocks_per_tick; - f64 tstamp_ticks_per_clock; - u64 *time_now; - - /** per-worker tx buffer free lists */ - u32 **tx_buffers; - /** per-worker tx frames to SCTP 4/6 output nodes */ - vlib_frame_t **tx_frames[2]; - /** per-worker tx frames to ip 4/6 lookup nodes */ - vlib_frame_t **ip_lookup_tx_frames[2]; - - /* Per worker-thread timer wheel for connections timers */ - tw_timer_wheel_16t_2w_512sl_t *timer_wheels; - - /* Pool of half-open connections on which we've sent a SYN */ - sctp_connection_t *half_open_connections; - clib_spinlock_t half_open_lock; - - /* TODO: Congestion control algorithms registered */ - /* sctp_cc_algorithm_t *cc_algos; */ - - /* Flag that indicates if stack is on or off */ - u8 is_enabled; - u8 is_init; - - /** Number of preallocated connections */ - u32 preallocated_connections; - - /** Transport table (preallocation) size parameters */ - u32 local_endpoints_table_memory; - u32 local_endpoints_table_buckets; - - /** Vectors of src addresses. Optional unless one needs > 63K active-opens */ - ip4_address_t *ip4_src_addresses; - u32 last_v4_address_rotor; - u32 last_v6_address_rotor; - ip6_address_t *ip6_src_addresses; - - /** vlib buffer size */ - u32 bytes_per_buffer; - - u8 punt_unknown4; - u8 punt_unknown6; - - u32 sctp4_established_phase_node_index; - u32 sctp6_established_phase_node_index; - - u16 msg_id_base; -} sctp_main_t; - -extern sctp_main_t sctp_main; -extern vlib_node_registration_t sctp4_input_node; -extern vlib_node_registration_t sctp6_input_node; -extern vlib_node_registration_t sctp4_output_node; -extern vlib_node_registration_t sctp6_output_node; - -always_inline sctp_main_t * -vnet_get_sctp_main () -{ - return &sctp_main; -} - -always_inline sctp_header_t * -sctp_buffer_hdr (vlib_buffer_t * b) -{ - ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE); - return (sctp_header_t *) (b->data + b->current_data - + sctp_buffer_opaque (b)->sctp.hdr_offset); -} - -clib_error_t *vnet_sctp_enable_disable (vlib_main_t * vm, u8 is_en); -clib_error_t *sctp_plugin_api_hookup (vlib_main_t * vm); - -always_inline sctp_connection_t * -sctp_half_open_connection_get (u32 conn_index) -{ - sctp_connection_t *tc = 0; - clib_spinlock_lock_if_init (&sctp_main.half_open_lock); - if (!pool_is_free_index (sctp_main.half_open_connections, conn_index)) - tc = pool_elt_at_index (sctp_main.half_open_connections, conn_index); - tc->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx = SCTP_PRIMARY_PATH_IDX; - clib_spinlock_unlock_if_init (&sctp_main.half_open_lock); - return tc; -} - -/** - * Cleanup half-open connection - * - */ -always_inline void -sctp_half_open_connection_del (sctp_connection_t * tc) -{ - sctp_main_t *sctp_main = vnet_get_sctp_main (); - u32 index = tc->sub_conn[SCTP_PRIMARY_PATH_IDX].c_c_index; - clib_spinlock_lock_if_init (&sctp_main->half_open_lock); - if (CLIB_DEBUG) - clib_memset (tc, 0xFA, sizeof (*tc)); - pool_put_index (sctp_main->half_open_connections, index); - clib_spinlock_unlock_if_init (&sctp_main->half_open_lock); -} - -always_inline u64 -sctp_set_time_now (u32 thread_index) -{ - sctp_main.time_now[thread_index] = clib_cpu_time_now () - * sctp_main.tstamp_ticks_per_clock; - return sctp_main.time_now[thread_index]; -} - -always_inline void -sctp_timer_set (sctp_connection_t * tc, u8 conn_idx, u8 timer_id, - u32 interval) -{ - ASSERT (tc->sub_conn[conn_idx].connection.thread_index == - vlib_get_thread_index ()); - ASSERT (tc->sub_conn[conn_idx].timers[timer_id] == - SCTP_TIMER_HANDLE_INVALID); - - sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx]; - sub->timers[timer_id] = - tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index], - sub->c_c_index, timer_id, interval); -} - -always_inline void -sctp_timer_reset (sctp_connection_t * tc, u8 conn_idx, u8 timer_id) -{ - ASSERT (tc->sub_conn[conn_idx].c_thread_index == vlib_get_thread_index ()); - if (tc->sub_conn[conn_idx].timers[timer_id] == SCTP_TIMER_HANDLE_INVALID) - return; - - sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx]; - - tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index], - sub->timers[timer_id]); - sub->timers[timer_id] = SCTP_TIMER_HANDLE_INVALID; -} - -/** - * Try to cleanup half-open connection - * - * If called from a thread that doesn't own tc, the call won't have any - * effect. - * - * @param tc - connection to be cleaned up - * @return non-zero if cleanup failed. - */ -always_inline int -sctp_half_open_connection_cleanup (sctp_connection_t * tc) -{ - /* Make sure this is the owning thread */ - if (tc->sub_conn[SCTP_PRIMARY_PATH_IDX].c_thread_index != - vlib_get_thread_index ()) - return 1; - sctp_timer_reset (tc, SCTP_PRIMARY_PATH_IDX, SCTP_TIMER_T1_INIT); - sctp_half_open_connection_del (tc); - return 0; -} - -always_inline u32 -sctp_header_bytes () -{ - return sizeof (sctp_header_t); -} - -always_inline sctp_connection_t * -sctp_get_connection_from_transport (transport_connection_t * tconn) -{ - ASSERT (tconn != NULL); - - sctp_sub_connection_t *sub = (sctp_sub_connection_t *) tconn; -#if SCTP_ADV_DEBUG - if (sub == NULL) - SCTP_ADV_DBG ("sub == NULL"); - if (sub->parent == NULL) - SCTP_ADV_DBG ("sub->parent == NULL"); -#endif - if (sub->subconn_idx > 0) - return (sctp_connection_t *) sub - - (sizeof (sctp_sub_connection_t) * (sub->subconn_idx - 1)); - - return (sctp_connection_t *) sub; -} - -always_inline u64 -sctp_time_now (void) -{ - return sctp_main.time_now[vlib_get_thread_index ()]; -} - -#define ABS(x) ((x) > 0) ? (x) : -(x); - -always_inline void -sctp_calculate_rto (sctp_connection_t * sctp_conn, u8 conn_idx) -{ - /* See RFC4960, 6.3.1. RTO Calculation */ - u64 RTO = 0; - f64 RTTVAR = 0; - u64 now = sctp_time_now (); - u64 prev_ts = sctp_conn->sub_conn[conn_idx].rtt_ts; - u64 R = prev_ts - now; - - if (sctp_conn->sub_conn[conn_idx].RTO == 0) // C1: Let's initialize our RTO - { - sctp_conn->sub_conn[conn_idx].RTO = SCTP_RTO_MIN; - return; - } - - if (sctp_conn->sub_conn[conn_idx].RTO == SCTP_RTO_MIN && sctp_conn->sub_conn[conn_idx].SRTT == 0) // C2: First RTT calculation - { - sctp_conn->sub_conn[conn_idx].SRTT = R; - RTTVAR = R / 2; - - if (RTTVAR == 0) - RTTVAR = 100e-3; /* 100 ms */ - - sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR; - } - else // C3: RTT already exists; let's recalculate - { - RTTVAR = (1 - SCTP_RTO_BETA) * sctp_conn->sub_conn[conn_idx].RTTVAR + - SCTP_RTO_BETA * ABS (sctp_conn->sub_conn[conn_idx].SRTT - R); - - if (RTTVAR == 0) - RTTVAR = 100e-3; /* 100 ms */ - - sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR; - - sctp_conn->sub_conn[conn_idx].SRTT = - (1 - SCTP_RTO_ALPHA) * sctp_conn->sub_conn[conn_idx].SRTT + - SCTP_RTO_ALPHA * R; - } - - RTO = - sctp_conn->sub_conn[conn_idx].SRTT + - 4 * sctp_conn->sub_conn[conn_idx].RTTVAR; - if (RTO < SCTP_RTO_MIN) // C6 - RTO = SCTP_RTO_MIN; - - if (RTO > SCTP_RTO_MAX) // C7 - RTO = SCTP_RTO_MAX; - - sctp_conn->sub_conn[conn_idx].RTO = RTO; -} - -always_inline void -sctp_timer_update (sctp_connection_t * tc, u8 conn_idx, u8 timer_id, - u32 interval) -{ - ASSERT (tc->sub_conn[conn_idx].connection.thread_index == - vlib_get_thread_index ()); - sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx]; - - if (tc->sub_conn[conn_idx].timers[timer_id] != SCTP_TIMER_HANDLE_INVALID) - tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index], - sub->timers[timer_id]); - - tc->sub_conn[conn_idx].timers[timer_id] = - tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index], - sub->c_c_index, timer_id, interval); -} - -always_inline sctp_connection_t * -sctp_listener_get (u32 tli) -{ - return pool_elt_at_index (sctp_main.listener_pool, tli); -} - -#endif - -always_inline sctp_connection_t * -sctp_connection_get (u32 conn_index, u32 thread_index) -{ - if (PREDICT_FALSE - (pool_is_free_index (sctp_main.connections[thread_index], conn_index))) - return 0; - return pool_elt_at_index (sctp_main.connections[thread_index], conn_index); -} - -#define SELECT_MAX_RETRIES 8 - -always_inline u8 -sctp_data_subconn_select (sctp_connection_t * sctp_conn) -{ - u32 sub = SCTP_PRIMARY_PATH_IDX; - u8 i, cwnd = sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].cwnd; - for (i = 1; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN) - continue; - - if (sctp_conn->sub_conn[i].cwnd > cwnd) - { - sub = i; - cwnd = sctp_conn->sub_conn[i].cwnd; - } - } - return sub; -} - -always_inline u8 -sctp_sub_conn_id_via_ip6h (sctp_connection_t * sctp_conn, ip6_header_t * ip6h) -{ - u8 i; - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].connection.lcl_ip.ip6.as_u64[0] == - ip6h->dst_address.as_u64[0] && - sctp_conn->sub_conn[i].connection.lcl_ip.ip6.as_u64[1] == - ip6h->dst_address.as_u64[1] && - sctp_conn->sub_conn[i].connection.rmt_ip.ip6.as_u64[0] == - ip6h->src_address.as_u64[0] && - sctp_conn->sub_conn[i].connection.rmt_ip.ip6.as_u64[1] == - ip6h->src_address.as_u64[1]) - return i; - } - clib_warning ("Did not find a sub-connection; defaulting to %u", - SCTP_PRIMARY_PATH_IDX); - return SCTP_PRIMARY_PATH_IDX; -} - -always_inline u8 -sctp_sub_conn_id_via_ip4h (sctp_connection_t * sctp_conn, ip4_header_t * ip4h) -{ - u8 i; - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].connection.lcl_ip.ip4.as_u32 == - ip4h->dst_address.as_u32 - && sctp_conn->sub_conn[i].connection.rmt_ip.ip4.as_u32 == - ip4h->src_address.as_u32) - return i; - } - clib_warning ("Did not find a sub-connection; defaulting to %u", - SCTP_PRIMARY_PATH_IDX); - return SCTP_PRIMARY_PATH_IDX; -} - -/** - * Push SCTP header to buffer - * - * @param vm - vlib_main - * @param b - buffer to write the header to - * @param sp_net - source port net order - * @param dp_net - destination port net order - * @param sctp_hdr_opts_len - header and options length in bytes - * - * @return - pointer to start of SCTP header - */ -always_inline void * -vlib_buffer_push_sctp_net_order (vlib_buffer_t * b, u16 sp, u16 dp, - u8 sctp_hdr_opts_len) -{ - sctp_full_hdr_t *full_hdr; - - full_hdr = vlib_buffer_push_uninit (b, sctp_hdr_opts_len); - - full_hdr->hdr.src_port = sp; - full_hdr->hdr.dst_port = dp; - full_hdr->hdr.checksum = 0; - return full_hdr; -} - -/** - * Push SCTP header to buffer - * - * @param b - buffer to write the header to - * @param sp_net - source port net order - * @param dp_net - destination port net order - * @param sctp_hdr_opts_len - header and options length in bytes - * - * @return - pointer to start of SCTP header - */ -always_inline void * -vlib_buffer_push_sctp (vlib_buffer_t * b, u16 sp_net, u16 dp_net, - u8 sctp_hdr_opts_len) -{ - return vlib_buffer_push_sctp_net_order (b, sp_net, dp_net, - sctp_hdr_opts_len); -} - -always_inline u8 -sctp_next_avail_subconn (sctp_connection_t * sctp_conn) -{ - u8 i; - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN) - return i; - } - return MAX_SCTP_CONNECTIONS; -} - -always_inline void -update_smallest_pmtu_idx (sctp_connection_t * sctp_conn) -{ - u8 i; - u8 smallest_pmtu_index = SCTP_PRIMARY_PATH_IDX; - - for (i = 1; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].state != SCTP_SUBCONN_STATE_DOWN) - { - if (sctp_conn->sub_conn[i].PMTU < - sctp_conn->sub_conn[smallest_pmtu_index].PMTU) - smallest_pmtu_index = i; - } - } - - sctp_conn->smallest_PMTU_idx = smallest_pmtu_index; -} - -/* As per RFC4960; section 7.2.1: Slow-Start */ -always_inline void -sctp_init_cwnd (sctp_connection_t * sctp_conn) -{ - u8 i; - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - /* Section 7.2.1; point (1) */ - sctp_conn->sub_conn[i].cwnd = - clib_min (4 * sctp_conn->sub_conn[i].PMTU, - clib_max (2 * sctp_conn->sub_conn[i].PMTU, 4380)); - - /* Section 7.2.1; point (3) */ - sctp_conn->sub_conn[i].ssthresh = SCTP_INITIAL_SSHTRESH; - - /* Section 7.2.2; point (1) */ - sctp_conn->sub_conn[i].partially_acked_bytes = 0; - } -} - -always_inline u8 -sctp_in_cong_recovery (sctp_connection_t * sctp_conn, u8 idx) -{ - return 0; -} - -always_inline u8 -cwnd_fully_utilized (sctp_connection_t * sctp_conn, u8 idx) -{ - if (sctp_conn->sub_conn[idx].cwnd == 0) - return 1; - return 0; -} - -/* As per RFC4960; section 7.2.1: Slow-Start */ -always_inline void -update_cwnd (sctp_connection_t * sctp_conn) -{ - u8 i; - u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn; - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - /* Section 7.2.1; point (2) */ - if (sctp_conn->sub_conn[i].is_retransmitting) - { - sctp_conn->sub_conn[i].cwnd = 1 * sctp_conn->sub_conn[i].PMTU; - continue; - } - - /* Section 7.2.2; point (4) */ - if (sctp_conn->sub_conn[i].last_data_ts > - sctp_time_now () + SCTP_DATA_IDLE_INTERVAL) - { - sctp_conn->sub_conn[i].cwnd = - clib_max (sctp_conn->sub_conn[i].cwnd / 2, - 4 * sctp_conn->sub_conn[i].PMTU); - continue; - } - - /* Section 7.2.1; point (5) */ - if (sctp_conn->sub_conn[i].cwnd <= sctp_conn->sub_conn[i].ssthresh) - { - if (!cwnd_fully_utilized (sctp_conn, i)) - continue; - - if (sctp_in_cong_recovery (sctp_conn, i)) - continue; - - sctp_conn->sub_conn[i].cwnd = - clib_min (sctp_conn->sub_conn[i].PMTU, 1); - } - - /* Section 6.1; point (D) */ - if ((inflight + SCTP_RTO_BURST * sctp_conn->sub_conn[i].PMTU) < - sctp_conn->sub_conn[i].cwnd) - sctp_conn->sub_conn[i].cwnd = - inflight + SCTP_RTO_BURST * sctp_conn->sub_conn[i].PMTU; - } -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_api.c b/src/plugins/sctp/sctp_api.c deleted file mode 100644 index d804fcb36a4..00000000000 --- a/src/plugins/sctp/sctp_api.c +++ /dev/null @@ -1,104 +0,0 @@ -/* - *------------------------------------------------------------------ - * sctp_api.c - sctp-layer API - * - * Copyright (c) 2018 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - *------------------------------------------------------------------ - */ - -#include <vlib/vlib.h> -#include <vlibapi/api.h> -#include <vlibmemory/api.h> - -#include <vnet/ip/ip_types_api.h> -#include <vnet/format_fns.h> - -#include <sctp/sctp.h> - -#include <sctp/sctp.api_enum.h> -#include <sctp/sctp.api_types.h> - -#define REPLY_MSG_ID_BASE sctp_main.msg_id_base -#include <vlibapi/api_helper_macros.h> - -static void - vl_api_sctp_add_src_dst_connection_t_handler - (vl_api_sctp_add_src_dst_connection_t * mp) -{ - vlib_main_t *vm = vlib_get_main (); - vl_api_sctp_add_src_dst_connection_reply_t *rmp; - int rv; - ip46_address_t src, dst; - - ip_address_decode (&mp->src_address, &src); - ip_address_decode (&mp->dst_address, &dst); - - if (ip46_address_is_ip4 (&src) && ip46_address_is_ip4 (&dst)) - rv = sctp_sub_connection_add_ip4 (vm, &src.ip4, &dst.ip4); - else - rv = sctp_sub_connection_add_ip6 (vm, &src.ip6, &dst.ip6); - - REPLY_MACRO (VL_API_SCTP_ADD_SRC_DST_CONNECTION_REPLY); -} - -static void - vl_api_sctp_del_src_dst_connection_t_handler - (vl_api_sctp_del_src_dst_connection_t * mp) -{ - vl_api_sctp_del_src_dst_connection_reply_t *rmp; - int rv; - ip46_address_t src, dst; - - ip_address_decode (&mp->src_address, &src); - ip_address_decode (&mp->dst_address, &dst); - - if (ip46_address_is_ip4 (&src) && ip46_address_is_ip4 (&dst)) - rv = sctp_sub_connection_del_ip4 (&src.ip4, &dst.ip4); - else - rv = sctp_sub_connection_del_ip6 (&src.ip6, &dst.ip6); - - REPLY_MACRO (VL_API_SCTP_ADD_SRC_DST_CONNECTION_REPLY); -} - -static void -vl_api_sctp_config_t_handler (vl_api_sctp_config_t * mp) -{ - sctp_user_configuration_t config; - vl_api_sctp_config_reply_t *rmp; - int rv; - - config.never_delay_sack = mp->never_delay_sack; - config.never_bundle = mp->never_bundle; - rv = sctp_configure (config); - - REPLY_MACRO (VL_API_SCTP_CONFIG_REPLY); -} - -#include <sctp/sctp.api.c> -clib_error_t * -sctp_plugin_api_hookup (vlib_main_t * vm) -{ - /* Ask for a correctly-sized block of API message decode slots */ - sctp_main.msg_id_base = setup_message_id_table (); - - return 0; -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_debug.h b/src/plugins/sctp/sctp_debug.h deleted file mode 100644 index b0059d5fe67..00000000000 --- a/src/plugins/sctp/sctp_debug.h +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef included_sctp_debug_h__ -#define included_sctp_debug_h__ - -#include <vlib/vlib.h> - -typedef enum _sctp_dbg -{ -#define _(sym, str) SCTP_DBG_##sym, - foreach_sctp_dbg_evt -#undef _ -} sctp_dbg_e; - -#define SCTP_DEBUG_STATE_MACHINE (0) -#if SCTP_DEBUG_STATE_MACHINE -#define SCTP_DBG_STATE_MACHINE(_fmt, _args...) clib_warning (_fmt, ##_args) -#else -#define SCTP_DBG_STATE_MACHINE(_fmt, _args...) -#endif - -#define SCTP_DEBUG (0) -#if SCTP_DEBUG -#define SCTP_DBG(_fmt, _args...) clib_warning (_fmt, ##_args) -#else -#define SCTP_DBG(_fmt, _args...) -#endif - -#define SCTP_ADV_DEBUG (0) -#if SCTP_ADV_DEBUG -#define SCTP_ADV_DBG(_fmt, _args...) clib_warning (_fmt, ##_args) -#else -#define SCTP_ADV_DBG(_fmt, _args...) -#endif - -#define SCTP_DEBUG_OUTPUT (0) -#if SCTP_DEBUG_OUTPUT -#define SCTP_DBG_OUTPUT(_fmt, _args...) clib_warning (_fmt, ##_args) -#else -#define SCTP_DBG_OUTPUT(_fmt, _args...) -#endif - -#define SCTP_ADV_DEBUG_OUTPUT (0) -#if SCTP_ADV_DEBUG_OUTPUT -#define SCTP_ADV_DBG_OUTPUT(_fmt, _args...) clib_warning (_fmt, ##_args) -#else -#define SCTP_ADV_DBG_OUTPUT(_fmt, _args...) -#endif - -#define SCTP_CONN_TRACKING_DEBUG (0) -#if SCTP_CONN_TRACKING_DEBUG -#define SCTP_CONN_TRACKING_DBG(_fmt, _args...) clib_warning (_fmt, ##_args) -#else -#define SCTP_CONN_TRACKING_DBG(_fmt, _args...) -#endif - -#endif /* included_sctp_debug_h__ */ diff --git a/src/plugins/sctp/sctp_error.def b/src/plugins/sctp/sctp_error.def deleted file mode 100644 index b95b71a9417..00000000000 --- a/src/plugins/sctp/sctp_error.def +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -sctp_error (NONE, "no error") -sctp_error (WRONG_WORKER, "Wrong worker thread") -sctp_error (FILTERED, "Packets filtered") -sctp_error (PKTS_SENT, "Packets sent") -sctp_error (INVALID_CONNECTION, "Invalid connection") -sctp_error (INVALID_TAG, "Invalid verification tag") -sctp_error (INVALID_TAG_FOR_INIT, "Invalid verification tag for INIT chunk") -sctp_error (CONNECTION_CLOSED, "Connection closed") -sctp_error (ENQUEUED, "Packets pushed into rx fifo") -sctp_error (CREATE_EXISTS, "Connection already exists") -sctp_error (INITS_RCVD, "INITs received") -sctp_error (CREATE_SESSION_FAIL, "Sessions couldn't be allocated") -sctp_error (NO_LISTENER, "no listener for dst port") -sctp_error (LENGTH, "inconsistent ip/sctp lengths") -sctp_error (DISPATCH, "Dispatch error") -sctp_error (ACK_DUP, "Duplicate ACK") -sctp_error (DATA_CHUNK_VIOLATION, "DATA chunk received in invalid state") -sctp_error (INIT_CHUNK_VIOLATION, "INIT chunk received in the wrong state") -sctp_error (INIT_ACK_CHUNK_VIOLATION, "INIT_ACK chunk received in the wrong state") -sctp_error (SACK_CHUNK_VIOLATION, "SACK chunk received in invalid state") -sctp_error (HEARTBEAT_CHUNK_VIOLATION, "HEARTBEAT chunk received in invalid state") -sctp_error (HEARTBEAT_ACK_CHUNK_VIOLATION, "HEARTBEAT_ACK chunk received in invalid state") -sctp_error (ABORT_CHUNK_VIOLATION, "ABORT_CHUNK chunk received in invalid state") -sctp_error (SHUTDOWN_CHUNK_VIOLATION, "SHUTDOWN chunk received in invalid state") -sctp_error (SHUTDOWN_ACK_CHUNK_VIOLATION, "SHUTDOWN_ACK chunk received in invalid state") -sctp_error (OPERATION_ERROR_VIOLATION, "OPERATION_ERROR chunk received in invalid state") -sctp_error (COOKIE_ECHO_VIOLATION, "COOKIE_ECHO chunk received in invalid state") -sctp_error (COOKIE_ACK_VIOLATION, "COOKIE_ACK chunk received in invalid state") -sctp_error (ECNE_VIOLATION, "ECNE chunk received in invalid state") -sctp_error (CWR_VIOLATION, "CWR chunk received in invalid state") -sctp_error (SHUTDOWN_COMPLETE_VIOLATION, "SHUTDOWN_COMPLETE chunk received in invalid state") -sctp_error (FIFO_FULL, "Packets dropped for lack of rx fifo space") -sctp_error (PARTIALLY_ENQUEUED, "Packets partially pushed into rx fifo") -sctp_error (EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") -sctp_error (UNKNOWN_CHUNK, "Unrecognized / unknown chunk or chunk-state mismatch") -sctp_error (BUNDLING_VIOLATION, "Bundling not allowed") -sctp_error (PUNT, "Packets punted") -sctp_error (MAX_CONNECTIONS, "Reached max supported subconnection") diff --git a/src/plugins/sctp/sctp_format.c b/src/plugins/sctp/sctp_format.c deleted file mode 100644 index 99430c70c2c..00000000000 --- a/src/plugins/sctp/sctp_format.c +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <sctp/sctp.h> - -/* Format SCTP header. */ -u8 * -format_sctp_header (u8 * s, va_list * args) -{ - return NULL; -} - -u8 * -format_sctp_tx_trace (u8 * s, va_list * args) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - - return NULL; -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_input.c b/src/plugins/sctp/sctp_input.c deleted file mode 100644 index 7f52a2f9c32..00000000000 --- a/src/plugins/sctp/sctp_input.c +++ /dev/null @@ -1,2532 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include <vppinfra/sparse_vec.h> -#include <sctp/sctp.h> -#include <sctp/sctp_packet.h> -#include <sctp/sctp_debug.h> -#include <vnet/session/session.h> -#include <math.h> - -static char *sctp_error_strings[] = { -#define sctp_error(n,s) s, -#include <sctp/sctp_error.def> -#undef sctp_error -}; - -/* All SCTP nodes have the same outgoing arcs */ -#define foreach_sctp_state_next \ - _ (DROP4, "ip4-drop") \ - _ (DROP6, "ip6-drop") \ - _ (SCTP4_OUTPUT, "sctp4-output") \ - _ (SCTP6_OUTPUT, "sctp6-output") - -typedef enum _sctp_established_phase_next -{ -#define _(s,n) SCTP_ESTABLISHED_PHASE_NEXT_##s, - foreach_sctp_state_next -#undef _ - SCTP_ESTABLISHED_PHASE_N_NEXT, -} sctp_established_phase_next_t; - -typedef enum _sctp_rcv_phase_next -{ -#define _(s,n) SCTP_RCV_PHASE_NEXT_##s, - foreach_sctp_state_next -#undef _ - SCTP_RCV_PHASE_N_NEXT, -} sctp_rcv_phase_next_t; - -typedef enum _sctp_listen_phase_next -{ -#define _(s,n) SCTP_LISTEN_PHASE_NEXT_##s, - foreach_sctp_state_next -#undef _ - SCTP_LISTEN_PHASE_N_NEXT, -} sctp_listen_phase_next_t; - -typedef enum _sctp_shutdown_phase_next -{ -#define _(s,n) SCTP_SHUTDOWN_PHASE_NEXT_##s, - foreach_sctp_state_next -#undef _ - SCTP_SHUTDOWN_PHASE_N_NEXT, -} sctp_shutdown_phase_next_t; - -/* Generic, state independent indices */ -typedef enum _sctp_state_next -{ -#define _(s,n) SCTP_NEXT_##s, - foreach_sctp_state_next -#undef _ - SCTP_STATE_N_NEXT, -} sctp_state_next_t; - -typedef enum _sctp_input_next -{ - SCTP_INPUT_NEXT_DROP, - SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_INPUT_NEXT_RCV_PHASE, - SCTP_INPUT_NEXT_ESTABLISHED_PHASE, - SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_INPUT_NEXT_PUNT_PHASE, - SCTP_INPUT_N_NEXT -} sctp_input_next_t; - -#ifndef CLIB_MARCH_VARIANT -char * -phase_to_string (u8 phase) -{ - switch (phase) - { - case SCTP_INPUT_NEXT_DROP: - return "SCTP_INPUT_NEXT_DROP"; - case SCTP_INPUT_NEXT_LISTEN_PHASE: - return "SCTP_INPUT_NEXT_LISTEN_PHASE"; - case SCTP_INPUT_NEXT_RCV_PHASE: - return "SCTP_INPUT_NEXT_RCV_PHASE"; - case SCTP_INPUT_NEXT_ESTABLISHED_PHASE: - return "SCTP_INPUT_NEXT_ESTABLISHED_PHASE"; - case SCTP_INPUT_NEXT_SHUTDOWN_PHASE: - return "SCTP_INPUT_NEXT_SHUTDOWN_PHASE"; - case SCTP_INPUT_NEXT_PUNT_PHASE: - return "SCTP_INPUT_NEXT_PUNT_PHASE"; - } - return NULL; -} -#endif /* CLIB_MARCH_VARIANT */ - -#define foreach_sctp4_input_next \ - _ (DROP, "error-drop") \ - _ (RCV_PHASE, "sctp4-rcv") \ - _ (LISTEN_PHASE, "sctp4-listen") \ - _ (ESTABLISHED_PHASE, "sctp4-established") \ - _ (SHUTDOWN_PHASE, "sctp4-shutdown") \ - _ (PUNT_PHASE, "ip4-punt") - - -#define foreach_sctp6_input_next \ - _ (DROP, "error-drop") \ - _ (RCV_PHASE, "sctp6-rcv") \ - _ (LISTEN_PHASE, "sctp6-listen") \ - _ (ESTABLISHED_PHASE, "sctp6-established") \ - _ (SHUTDOWN_PHASE, "sctp6-shutdown") \ - _ (PUNT_PHASE, "ip6-punt") - -static u8 -sctp_lookup_is_valid (transport_connection_t * trans_conn, - sctp_header_t * sctp_hdr) -{ - sctp_connection_t *sctp_conn = - sctp_get_connection_from_transport (trans_conn); - - if (!sctp_conn) - return 1; - - u8 is_valid = (trans_conn->lcl_port == sctp_hdr->dst_port - && (sctp_conn->state == SCTP_STATE_CLOSED - || trans_conn->rmt_port == sctp_hdr->src_port)); - - return is_valid; -} - -/** - * Lookup transport connection - */ -static sctp_connection_t * -sctp_lookup_connection (u32 fib_index, vlib_buffer_t * b, u8 thread_index, - u8 is_ip4) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - sctp_header_t *sctp_hdr; - transport_connection_t *trans_conn; - sctp_connection_t *sctp_conn; - u8 is_filtered, i; - if (is_ip4) - { - ip4_header_t *ip4_hdr; - ip4_hdr = vlib_buffer_get_current (b); - sctp_hdr = ip4_next_header (ip4_hdr); - trans_conn = session_lookup_connection_wt4 (fib_index, - &ip4_hdr->dst_address, - &ip4_hdr->src_address, - sctp_hdr->dst_port, - sctp_hdr->src_port, - TRANSPORT_PROTO_SCTP, - thread_index, &is_filtered); - if (trans_conn == 0) /* Not primary connection */ - { - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if ((tm->connections[thread_index]->sub_conn[i]. - connection.lcl_ip.ip4.as_u32 == - ip4_hdr->dst_address.as_u32) - && (tm->connections[thread_index]->sub_conn[i]. - connection.rmt_ip.ip4.as_u32 == - ip4_hdr->src_address.as_u32)) - { - trans_conn = - &tm->connections[thread_index]->sub_conn[i].connection; - break; - } - } - } - ASSERT (trans_conn != 0); - ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr)); - } - else - { - ip6_header_t *ip6_hdr; - ip6_hdr = vlib_buffer_get_current (b); - sctp_hdr = ip6_next_header (ip6_hdr); - trans_conn = session_lookup_connection_wt6 (fib_index, - &ip6_hdr->dst_address, - &ip6_hdr->src_address, - sctp_hdr->dst_port, - sctp_hdr->src_port, - TRANSPORT_PROTO_SCTP, - thread_index, &is_filtered); - if (trans_conn == 0) /* Not primary connection */ - { - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if ((tm->connections[thread_index]->sub_conn[i]. - connection.lcl_ip.ip6.as_u64[0] == - ip6_hdr->dst_address.as_u64[0] - && tm->connections[thread_index]->sub_conn[i]. - connection.lcl_ip.ip6.as_u64[1] == - ip6_hdr->dst_address.as_u64[1]) - && (tm->connections[thread_index]->sub_conn[i]. - connection.rmt_ip.ip6.as_u64[0] == - ip6_hdr->src_address.as_u64[0] - && tm->connections[thread_index]-> - sub_conn[i].connection.rmt_ip.ip6.as_u64[1] == - ip6_hdr->src_address.as_u64[1])) - { - trans_conn = - &tm->connections[thread_index]->sub_conn[i].connection; - break; - } - } - } - ASSERT (trans_conn != 0); - ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr)); - } - sctp_conn = sctp_get_connection_from_transport (trans_conn); - return sctp_conn; -} - -typedef struct -{ - sctp_header_t sctp_header; - sctp_connection_t sctp_connection; -} sctp_rx_trace_t; - -#define sctp_next_output(is_ip4) (is_ip4 ? SCTP_NEXT_SCTP4_OUTPUT \ - : SCTP_NEXT_SCTP6_OUTPUT) - -#define sctp_next_drop(is_ip4) (is_ip4 ? SCTP_NEXT_DROP4 \ - : SCTP_NEXT_DROP6) - -static void -sctp_set_rx_trace_data (sctp_rx_trace_t * rx_trace, - sctp_connection_t * sctp_conn, - sctp_header_t * sctp_hdr, vlib_buffer_t * b0, - u8 is_ip4) -{ - if (sctp_conn) - { - clib_memcpy_fast (&rx_trace->sctp_connection, sctp_conn, - sizeof (rx_trace->sctp_connection)); - } - else - { - sctp_hdr = sctp_buffer_hdr (b0); - } - clib_memcpy_fast (&rx_trace->sctp_header, sctp_hdr, - sizeof (rx_trace->sctp_header)); -} - -always_inline u16 -sctp_calculate_implied_length (ip4_header_t * ip4_hdr, ip6_header_t * ip6_hdr, - int is_ip4) -{ - u16 sctp_implied_packet_length = 0; - - if (is_ip4) - sctp_implied_packet_length = - clib_net_to_host_u16 (ip4_hdr->length) - ip4_header_bytes (ip4_hdr); - else - sctp_implied_packet_length = - clib_net_to_host_u16 (ip6_hdr->payload_length) - sizeof (ip6_hdr); - - return sctp_implied_packet_length; -} - -always_inline u8 -sctp_is_bundling (u16 sctp_implied_length, - sctp_chunks_common_hdr_t * sctp_common_hdr) -{ - if (sctp_implied_length != - sizeof (sctp_header_t) + vnet_sctp_get_chunk_length (sctp_common_hdr)) - return 1; - return 0; -} - -always_inline u16 -sctp_handle_operation_err (sctp_header_t * sctp_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, u16 * next0) -{ - sctp_operation_error_t *op_err = (sctp_operation_error_t *) sctp_hdr; - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hdr->verification_tag) - { - return SCTP_ERROR_INVALID_TAG; - } - - if (clib_net_to_host_u16 (op_err->err_causes[0].param_hdr.type) == - STALE_COOKIE_ERROR) - { - if (sctp_conn->state != SCTP_STATE_COOKIE_ECHOED) - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - else - { - sctp_connection_cleanup (sctp_conn); - - session_transport_closing_notify (&sctp_conn-> - sub_conn[idx].connection); - } - } - - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_handle_init (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, vlib_buffer_t * b0, - u16 sctp_implied_length) -{ - sctp_init_chunk_t *init_chunk = (sctp_init_chunk_t *) (sctp_hdr); - ip4_address_t ip4_addr; - ip6_address_t ip6_addr; - u8 add_ip4 = 0; - u8 add_ip6 = 0; - char hostname[FQDN_MAX_LENGTH]; - - /* Check the current state of the connection - * - * The logic required by the RFC4960 Section 5.2.2 is already taken care of - * in the code below and by the "sctp_prepare_initack_chunk" function. - * However, for debugging purposes it is nice to have a message printed out - * for these corner-case scenarios. - */ - if (sctp_conn->state != SCTP_STATE_CLOSED) - { /* UNEXPECTED scenario */ - switch (sctp_conn->state) - { - case SCTP_STATE_COOKIE_WAIT: - SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state"); - sctp_prepare_initack_chunk_for_collision (sctp_conn, - SCTP_PRIMARY_PATH_IDX, - b0, &ip4_addr, &ip6_addr); - return SCTP_ERROR_NONE; - case SCTP_STATE_COOKIE_ECHOED: - case SCTP_STATE_SHUTDOWN_ACK_SENT: - SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_ECHOED state"); - if (sctp_conn->forming_association_changed == 0) - sctp_prepare_initack_chunk_for_collision (sctp_conn, - SCTP_PRIMARY_PATH_IDX, - b0, &ip4_addr, - &ip6_addr); - else - sctp_prepare_abort_for_collision (sctp_conn, - SCTP_PRIMARY_PATH_IDX, b0, - &ip4_addr, &ip6_addr); - return SCTP_ERROR_NONE; - } - } - - if (sctp_hdr->verification_tag != 0x0) - return SCTP_ERROR_INVALID_TAG_FOR_INIT; - - /* - * It is not possible to bundle any other CHUNK with the INIT chunk - */ - if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr)) - return SCTP_ERROR_BUNDLING_VIOLATION; - - /* Save the INITIATE_TAG of the remote peer for this connection: - * it MUST be used for the VERIFICATION_TAG parameter in the SCTP HEADER */ - sctp_conn->remote_tag = init_chunk->initiate_tag; - sctp_conn->remote_initial_tsn = - clib_net_to_host_u32 (init_chunk->initial_tsn); - sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn; - sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1; - SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u", - sctp_conn->remote_initial_tsn); - - sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd); - /* - * If the length specified in the INIT message is bigger than the size in bytes of our structure it means that - * optional parameters have been sent with the INIT chunk and we need to parse them. - */ - u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr); - if (length > sizeof (sctp_init_chunk_t)) - { - /* There are optional parameters in the INIT chunk */ - u16 pointer_offset = sizeof (sctp_init_chunk_t); - while (pointer_offset < length) - { - sctp_opt_params_hdr_t *opt_params_hdr = - (sctp_opt_params_hdr_t *) init_chunk + pointer_offset; - - switch (clib_net_to_host_u16 (opt_params_hdr->type)) - { - case SCTP_IPV4_ADDRESS_TYPE: - { - sctp_ipv4_addr_param_t *ipv4 = - (sctp_ipv4_addr_param_t *) opt_params_hdr; - clib_memcpy_fast (&ip4_addr, &ipv4->address, - sizeof (ip4_address_t)); - - if (sctp_sub_connection_add_ip4 (vlib_get_main (), - &sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection. - lcl_ip.ip4, - &ipv4->address) == - SCTP_ERROR_NONE) - add_ip4 = 1; - - break; - } - case SCTP_IPV6_ADDRESS_TYPE: - { - sctp_ipv6_addr_param_t *ipv6 = - (sctp_ipv6_addr_param_t *) opt_params_hdr; - clib_memcpy_fast (&ip6_addr, &ipv6->address, - sizeof (ip6_address_t)); - - if (sctp_sub_connection_add_ip6 (vlib_get_main (), - &sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection. - lcl_ip.ip6, - &ipv6->address) == - SCTP_ERROR_NONE) - add_ip6 = 1; - - break; - } - case SCTP_COOKIE_PRESERVATIVE_TYPE: - { - sctp_cookie_preservative_param_t *cookie_pres = - (sctp_cookie_preservative_param_t *) opt_params_hdr; - sctp_conn->peer_cookie_life_span_increment = - cookie_pres->life_span_inc; - break; - } - case SCTP_HOSTNAME_ADDRESS_TYPE: - { - sctp_hostname_param_t *hostname_addr = - (sctp_hostname_param_t *) opt_params_hdr; - clib_memcpy_fast (hostname, hostname_addr->hostname, - FQDN_MAX_LENGTH); - break; - } - case SCTP_SUPPORTED_ADDRESS_TYPES: - { - /* TODO */ - break; - } - } - pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length); - } - } - - /* Reuse buffer to make init-ack and send */ - sctp_prepare_initack_chunk (sctp_conn, SCTP_PRIMARY_PATH_IDX, b0, &ip4_addr, - add_ip4, &ip6_addr, add_ip6); - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_is_valid_init_ack (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, vlib_buffer_t * b0, - u16 sctp_implied_length) -{ - sctp_init_ack_chunk_t *init_ack_chunk = - (sctp_init_ack_chunk_t *) (sctp_hdr); - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag) - { - return SCTP_ERROR_INVALID_TAG; - } - - /* - * It is not possible to bundle any other CHUNK with the INIT_ACK chunk - */ - if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr)) - return SCTP_ERROR_BUNDLING_VIOLATION; - - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_handle_init_ack (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 sctp_implied_length) -{ - sctp_init_ack_chunk_t *init_ack_chunk = - (sctp_init_ack_chunk_t *) (sctp_hdr); - - char hostname[FQDN_MAX_LENGTH]; - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag) - { - return SCTP_ERROR_INVALID_TAG; - } - - /* - * It is not possible to bundle any other CHUNK with the INIT chunk - */ - if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr)) - return SCTP_ERROR_BUNDLING_VIOLATION; - - /* Stop the T1_INIT timer */ - sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_INIT); - - sctp_calculate_rto (sctp_conn, idx); - - /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */ - sctp_conn->remote_tag = init_ack_chunk->initiate_tag; - sctp_conn->remote_initial_tsn = - clib_net_to_host_u32 (init_ack_chunk->initial_tsn); - sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn; - sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1; - SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u", - sctp_conn->remote_initial_tsn); - sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd); - - u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr); - - if (length > sizeof (sctp_init_ack_chunk_t)) - /* - * There are optional parameters in the INIT ACK chunk - */ - { - u16 pointer_offset = sizeof (sctp_init_ack_chunk_t); - - while (pointer_offset < length) - { - sctp_opt_params_hdr_t *opt_params_hdr = - (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk + - pointer_offset); - - switch (clib_net_to_host_u16 (opt_params_hdr->type)) - { - case SCTP_IPV4_ADDRESS_TYPE: - { - sctp_ipv4_addr_param_t *ipv4 = - (sctp_ipv4_addr_param_t *) opt_params_hdr; - - sctp_sub_connection_add_ip4 (vlib_get_main (), - &sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection. - lcl_ip.ip4, &ipv4->address); - - break; - } - case SCTP_IPV6_ADDRESS_TYPE: - { - sctp_ipv6_addr_param_t *ipv6 = - (sctp_ipv6_addr_param_t *) opt_params_hdr; - - sctp_sub_connection_add_ip6 (vlib_get_main (), - &sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection. - lcl_ip.ip6, &ipv6->address); - - break; - } - case SCTP_STATE_COOKIE_TYPE: - { - sctp_state_cookie_param_t *state_cookie_param = - (sctp_state_cookie_param_t *) opt_params_hdr; - - clib_memcpy_fast (&(sctp_conn->cookie_param), - state_cookie_param, - sizeof (sctp_state_cookie_param_t)); - - break; - } - case SCTP_HOSTNAME_ADDRESS_TYPE: - { - sctp_hostname_param_t *hostname_addr = - (sctp_hostname_param_t *) opt_params_hdr; - clib_memcpy_fast (hostname, hostname_addr->hostname, - FQDN_MAX_LENGTH); - break; - } - case SCTP_UNRECOGNIZED_TYPE: - { - break; - } - } - u16 increment = clib_net_to_host_u16 (opt_params_hdr->length); - /* This indicates something really bad happened */ - if (increment == 0) - { - return SCTP_ERROR_INVALID_TAG; - } - pointer_offset += increment; - } - } - - sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, 1); - - /* Start the T1_COOKIE timer */ - sctp_timer_set (sctp_conn, idx, - SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO); - - return SCTP_ERROR_NONE; -} - -/** Enqueue data out-of-order for delivery to application */ -always_inline int -sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn, - vlib_buffer_t * b, u16 data_len, u8 conn_idx) -{ - int written, error = SCTP_ERROR_ENQUEUED; - - written = - session_enqueue_stream_connection (&sctp_conn-> - sub_conn[conn_idx].connection, b, 0, - 1 /* queue event */ , - 0); - - /* Update next_tsn_expected */ - if (PREDICT_TRUE (written == data_len)) - { - sctp_conn->next_tsn_expected += written; - - SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]", - sctp_conn->sub_conn[conn_idx].connection.c_index, - written, data_len); - } - /* If more data written than expected, account for out-of-order bytes. */ - else if (written > data_len) - { - sctp_conn->next_tsn_expected += written; - - SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]", - sctp_conn->sub_conn[conn_idx].connection.c_index, - written, data_len); - } - else if (written > 0) - { - /* We've written something but FIFO is probably full now */ - sctp_conn->next_tsn_expected += written; - - error = SCTP_ERROR_PARTIALLY_ENQUEUED; - - SCTP_ADV_DBG - ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)", - sctp_conn->sub_conn[conn_idx].connection.c_index, written); - } - else - { - SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)", - sctp_conn->sub_conn[conn_idx].connection.c_index); - - return SCTP_ERROR_FIFO_FULL; - } - - /* TODO: Update out_of_order_map & SACK list */ - - return error; -} - -/** Enqueue data for delivery to application */ -always_inline int -sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b, - u16 data_len, u8 conn_idx) -{ - int written, error = SCTP_ERROR_ENQUEUED; - - written = - session_enqueue_stream_connection (&sctp_conn-> - sub_conn[conn_idx].connection, b, 0, - 1 /* queue event */ , - 1); - - /* Update next_tsn_expected */ - if (PREDICT_TRUE (written == data_len)) - { - sctp_conn->next_tsn_expected += written; - - SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]", - sctp_conn->sub_conn[conn_idx].connection.c_index, - written, data_len); - } - /* If more data written than expected, account for out-of-order bytes. */ - else if (written > data_len) - { - sctp_conn->next_tsn_expected += written; - - SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]", - sctp_conn->sub_conn[conn_idx].connection.c_index, - written, data_len); - } - else if (written > 0) - { - /* We've written something but FIFO is probably full now */ - sctp_conn->next_tsn_expected += written; - - error = SCTP_ERROR_PARTIALLY_ENQUEUED; - - SCTP_ADV_DBG - ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)", - sctp_conn->sub_conn[conn_idx].connection.c_index, written); - } - else - { - SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)", - sctp_conn->sub_conn[conn_idx].connection.c_index); - - return SCTP_ERROR_FIFO_FULL; - } - - return error; -} - -always_inline u8 -sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping) -{ - if (sctp_conn->conn_config.never_delay_sack) - { - SCTP_CONN_TRACKING_DBG ("sctp_conn->conn_config.never_delay_sack = ON"); - return 0; - } - - /* Section 4.4 of the RFC4960 */ - if (sctp_conn->state == SCTP_STATE_SHUTDOWN_SENT) - { - SCTP_CONN_TRACKING_DBG ("sctp_conn->state = %s; SACK not delayable", - sctp_state_to_string (sctp_conn->state)); - return 0; - } - - if (is_gapping) - { - SCTP_CONN_TRACKING_DBG - ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u", - sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state); - return 0; - } - - sctp_conn->ack_state += 1; - if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS) - { - SCTP_CONN_TRACKING_DBG - ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u", - sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state); - return 0; - } - - return 1; -} - -always_inline void -sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn, - u8 * gapping) -{ - if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING - { - SCTP_CONN_TRACKING_DBG - ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u", - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.c_index, - sctp_conn->next_tsn_expected, tsn, - sctp_conn->next_tsn_expected - tsn); - - *gapping = 1; - } -} - -always_inline u16 -sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk, - sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b, - u16 * next0) -{ - u32 error = 0, n_data_bytes; - u8 is_gapping = 0; - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - sctp_conn->sub_conn[idx].enqueue_state = SCTP_ERROR_INVALID_TAG; - return sctp_conn->sub_conn[idx].enqueue_state; - } - - sctp_buffer_opaque (b)->sctp.sid = sctp_data_chunk->stream_id; - sctp_buffer_opaque (b)->sctp.ssn = sctp_data_chunk->stream_seq; - - u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn); - - vlib_buffer_advance (b, sctp_buffer_opaque (b)->sctp.data_offset); - u32 chunk_len = vnet_sctp_get_chunk_length (&sctp_data_chunk->chunk_hdr) - - (sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_header_t)); - - ASSERT (sctp_buffer_opaque (b)->sctp.data_len); - ASSERT (chunk_len); - - /* Padding was added: see RFC 4096 section 3.3.1 */ - if (sctp_buffer_opaque (b)->sctp.data_len > chunk_len) - { - /* Let's change the data_len to the right amount calculated here now. - * We cannot do that in the generic sctp46_input_dispatcher node since - * that is common to all CHUNKS handling. - */ - sctp_buffer_opaque (b)->sctp.data_len = chunk_len; - /* We need to change b->current_length so that downstream calls to - * session_enqueue_stream_connection (called by sctp_session_enqueue_data) - * push the correct amount of data to be enqueued. - */ - b->current_length = chunk_len; - } - n_data_bytes = sctp_buffer_opaque (b)->sctp.data_len; - - sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping); - - sctp_conn->last_rcvd_tsn = tsn; - - SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data); - - u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr); - u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr); - - if (bbit == 1 && ebit == 1) /* Unfragmented message */ - { - /* In order data, enqueue. Fifo figures out by itself if any out-of-order - * segments can be enqueued after fifo tail offset changes. */ - if (PREDICT_FALSE (is_gapping == 1)) - error = - sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx); - else - error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx); - } - else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */ - { - error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx); - } - else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */ - { - if (PREDICT_FALSE (is_gapping == 1)) - error = - sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx); - else - error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx); - } - else /* Middle piece of a fragmented user message */ - { - if (PREDICT_FALSE (is_gapping == 1)) - error = - sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx); - else - error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx); - } - sctp_conn->last_rcvd_tsn = tsn; - - SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data); - - if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping)) - { - *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4); - sctp_prepare_sack_chunk (sctp_conn, idx, b); - } - else - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - - sctp_conn->sub_conn[idx].enqueue_state = error; - - return error; -} - -always_inline u16 -sctp_handle_cookie_echo (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 * next0) -{ - u64 now = sctp_time_now (); - - sctp_cookie_echo_chunk_t *cookie_echo = - (sctp_cookie_echo_chunk_t *) sctp_hdr; - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hdr->verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - sctp_calculate_rto (sctp_conn, idx); - - u64 creation_time = - clib_net_to_host_u64 (cookie_echo->cookie.creation_time); - u64 cookie_lifespan = - clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan); - - if (now > creation_time + cookie_lifespan) - { - SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)", - now, creation_time, cookie_lifespan); - return SCTP_ERROR_COOKIE_ECHO_VIOLATION; - } - - sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0); - - /* Change state */ - sctp_conn->state = SCTP_STATE_ESTABLISHED; - sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP; - *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4); - - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT, - sctp_conn->sub_conn[idx].RTO); - - session_stream_accept_notify (&sctp_conn->sub_conn[idx].connection); - - return SCTP_ERROR_NONE; - -} - -always_inline u16 -sctp_handle_cookie_ack (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 * next0) -{ - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hdr->verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - sctp_calculate_rto (sctp_conn, idx); - - sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE); - /* Change state */ - sctp_conn->state = SCTP_STATE_ESTABLISHED; - sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP; - - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT, - sctp_conn->sub_conn[idx].RTO); - - session_stream_accept_notify (&sctp_conn->sub_conn[idx].connection); - - return SCTP_ERROR_NONE; - -} - -always_inline uword -sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip4) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - - u32 n_left_from, next_index, *from, *to_next; - u32 my_thread_index = vm->thread_index; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - sctp_header_t *sctp_hdr = 0; - sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0; - ip4_header_t *ip4_hdr = 0; - ip6_header_t *ip6_hdr = 0; - sctp_connection_t *sctp_conn, *new_sctp_conn; - u16 sctp_implied_length = 0; - u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4); - u8 idx; - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - - /* If we are in SCTP_COOKIE_WAIT_STATE then the connection - * will come from the half-open connections pool. - */ - sctp_conn = - sctp_half_open_connection_get (sctp_buffer_opaque (b0)-> - sctp.connection_index); - - if (PREDICT_FALSE (sctp_conn == 0)) - { - SCTP_ADV_DBG - ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION"); - error0 = SCTP_ERROR_INVALID_CONNECTION; - goto drop; - } - if (is_ip4) - { - ip4_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip4_next_header (ip4_hdr); - idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr); - } - else - { - ip6_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip6_next_header (ip6_hdr); - idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr); - } - - sctp_conn->sub_conn[idx].subconn_idx = idx; - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - - sctp_chunk_hdr = - (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr); - - sctp_implied_length = - sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4); - - u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr); - - switch (chunk_type) - { - case INIT_ACK: - error0 = - sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn, - b0, sctp_implied_length); - - if (error0 == SCTP_ERROR_NONE) - { - pool_get (tm->connections[my_thread_index], new_sctp_conn); - clib_memcpy_fast (new_sctp_conn, sctp_conn, - sizeof (*new_sctp_conn)); - new_sctp_conn->sub_conn[idx].c_c_index = - new_sctp_conn - tm->connections[my_thread_index]; - new_sctp_conn->sub_conn[idx].c_thread_index = - my_thread_index; - new_sctp_conn->sub_conn[idx].PMTU = - sctp_conn->sub_conn[idx].PMTU; - new_sctp_conn->sub_conn[idx].subconn_idx = idx; - - if (sctp_half_open_connection_cleanup (sctp_conn)) - { - SCTP_DBG - ("Cannot cleanup half-open connection; not the owning thread"); - } - - sctp_connection_timers_init (new_sctp_conn); - - sctp_init_cwnd (new_sctp_conn); - - error0 = - sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr, - new_sctp_conn, idx, b0, - sctp_implied_length); - - if (session_stream_connect_notify - (&new_sctp_conn->sub_conn[idx].connection, 0)) - { - SCTP_DBG - ("conn_index = %u: session_stream_connect_notify error; cleaning up connection", - new_sctp_conn->sub_conn[idx].connection.c_index); - sctp_connection_cleanup (new_sctp_conn); - goto drop; - } - next0 = sctp_next_output (is_ip4); - } - break; - - case OPERATION_ERROR: - error0 = - sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0, - &next0); - break; - - /* All UNEXPECTED scenarios (wrong chunk received per state-machine) - * are handled by the input-dispatcher function using the table-lookup - * hence we should never get to the "default" case below. - */ - default: - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = sctp_next_drop (is_ip4); - goto drop; - } - - if (error0 != SCTP_ERROR_NONE) - { - clib_warning ("error while parsing chunk"); - sctp_connection_cleanup (sctp_conn); - next0 = sctp_next_drop (is_ip4); - goto drop; - } - - drop: - b0->error = node->errors[error0]; - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - sctp_rx_trace_t *t0 = - vlib_add_trace (vm, node, b0, sizeof (*t0)); - sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4); - } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - return from_frame->n_vectors; -} - -VLIB_NODE_FN (sctp4_rcv_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ ); -} - -VLIB_NODE_FN (sctp6_init_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ ); -} - -static u8 * -format_sctp_rx_trace_short (u8 * s, va_list * args) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *); - - s = format (s, "%d -> %d (%U)", - clib_net_to_host_u16 (t->sctp_header.src_port), - clib_net_to_host_u16 (t->sctp_header.dst_port), - format_sctp_state, t->sctp_connection.state); - - return s; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp4_rcv_phase_node) = -{ - .name = "sctp4-rcv", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_RCV_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp6_init_phase_node) = -{ - .name = "sctp6-rcv", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_RCV_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -always_inline u16 -sctp_handle_shutdown (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 sctp_implied_length, - u16 * next0) -{ - sctp_shutdown_association_chunk_t *shutdown_chunk = - (sctp_shutdown_association_chunk_t *) (sctp_hdr); - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hdr->verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - /* - * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk - */ - if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr)) - return SCTP_ERROR_BUNDLING_VIOLATION; - - switch (sctp_conn->state) - { - case SCTP_STATE_ESTABLISHED: - if (sctp_check_outstanding_data_chunks (sctp_conn) == 0) - sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED; - sctp_send_shutdown_ack (sctp_conn, idx, b0); - break; - - case SCTP_STATE_SHUTDOWN_SENT: - sctp_send_shutdown_ack (sctp_conn, idx, b0); - break; - } - - *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4); - - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 sctp_implied_length, - u16 * next0) -{ - sctp_shutdown_ack_chunk_t *shutdown_ack_chunk = - (sctp_shutdown_ack_chunk_t *) (sctp_hdr); - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hdr->verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - /* - * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk - */ - if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr)) - return SCTP_ERROR_BUNDLING_VIOLATION; - - /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT - * the reception of a SHUTDOWN_ACK chunk leads to the same actions: - * - STOP T2_SHUTDOWN timer - * - SEND SHUTDOWN_COMPLETE chunk - */ - sctp_timer_reset (sctp_conn, SCTP_PRIMARY_PATH_IDX, SCTP_TIMER_T2_SHUTDOWN); - - sctp_send_shutdown_complete (sctp_conn, idx, b0); - - *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4); - - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr, - sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 sctp_implied_length, - u16 * next0) -{ - sctp_shutdown_complete_chunk_t *shutdown_complete = - (sctp_shutdown_complete_chunk_t *) (sctp_hdr); - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hdr->verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - /* - * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk - */ - if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr)) - return SCTP_ERROR_BUNDLING_VIOLATION; - - sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN); - - session_transport_closing_notify (&sctp_conn->sub_conn[idx].connection); - - sctp_conn->state = SCTP_STATE_CLOSED; - - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - - return SCTP_ERROR_NONE; -} - -always_inline uword -sctp46_shutdown_phase_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip4) -{ - u32 n_left_from, next_index, *from, *to_next; - u32 my_thread_index = vm->thread_index; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - sctp_rx_trace_t *sctp_trace; - sctp_header_t *sctp_hdr = 0; - sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0; - ip4_header_t *ip4_hdr = 0; - ip6_header_t *ip6_hdr = 0; - sctp_connection_t *sctp_conn; - u16 sctp_implied_length = 0; - u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT; - u8 idx = 0; - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - sctp_conn = - sctp_connection_get (sctp_buffer_opaque (b0)-> - sctp.connection_index, my_thread_index); - - if (PREDICT_FALSE (sctp_conn == 0)) - { - SCTP_DBG - ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION"); - error0 = SCTP_ERROR_INVALID_CONNECTION; - goto drop; - } - - if (is_ip4) - { - ip4_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip4_next_header (ip4_hdr); - idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr); - } - else - { - ip6_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip6_next_header (ip6_hdr); - idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr); - } - - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - sctp_chunk_hdr = &full_hdr->common_hdr; - - sctp_implied_length = - sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4); - - u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr); - switch (chunk_type) - { - case SHUTDOWN: - error0 = - sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn, - idx, b0, sctp_implied_length, &next0); - break; - - case SHUTDOWN_ACK: - error0 = - sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn, - idx, b0, sctp_implied_length, - &next0); - break; - - case SHUTDOWN_COMPLETE: - error0 = - sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr, - sctp_conn, idx, b0, - sctp_implied_length, &next0); - - sctp_connection_cleanup (sctp_conn); - break; - - /* - * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING - * and SHUTDOWN-SENT states (as per RFC4960 Section 6) - */ - case DATA: - error0 = - sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr, - sctp_conn, idx, b0, &next0); - break; - - case OPERATION_ERROR: - error0 = - sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0, - &next0); - break; - - case COOKIE_ECHO: /* Cookie Received While Shutting Down */ - sctp_prepare_operation_error (sctp_conn, idx, b0, - COOKIE_RECEIVED_WHILE_SHUTTING_DOWN); - error0 = SCTP_ERROR_NONE; - next0 = sctp_next_output (is_ip4); - break; - /* All UNEXPECTED scenarios (wrong chunk received per state-machine) - * are handled by the input-dispatcher function using the table-lookup - * hence we should never get to the "default" case below. - */ - default: - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = sctp_next_drop (is_ip4); - goto drop; - } - - if (error0 != SCTP_ERROR_NONE) - { - clib_warning ("error while parsing chunk"); - sctp_connection_cleanup (sctp_conn); - next0 = sctp_next_drop (is_ip4); - goto drop; - } - - drop: - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - sctp_trace = - vlib_add_trace (vm, node, b0, sizeof (*sctp_trace)); - - if (sctp_hdr != NULL) - clib_memcpy_fast (&sctp_trace->sctp_header, sctp_hdr, - sizeof (sctp_trace->sctp_header)); - - if (sctp_conn != NULL) - clib_memcpy_fast (&sctp_trace->sctp_connection, sctp_conn, - sizeof (sctp_trace->sctp_connection)); - } - - b0->error = node->errors[error0]; - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - return from_frame->n_vectors; - -} - -VLIB_NODE_FN (sctp4_shutdown_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ ); -} - -VLIB_NODE_FN (sctp6_shutdown_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ ); -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) = -{ - .name = "sctp4-shutdown", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) = -{ - .name = "sctp6-shutdown", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -always_inline u16 -sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk, - sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0, - u16 * next0) -{ - - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_SACK_RECEIVED; - - sctp_conn->sub_conn[idx].last_seen = sctp_time_now (); - - /* Section 7.2.2; point (2) */ - if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh) - sctp_conn->sub_conn[idx].partially_acked_bytes = - sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack; - - /* Section 7.2.2; point (5) */ - if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0) - sctp_conn->sub_conn[idx].partially_acked_bytes = 0; - - sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack; - - sctp_calculate_rto (sctp_conn, idx); - - sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX, - sctp_conn->sub_conn[idx].RTO); - - sctp_conn->sub_conn[idx].RTO_pending = 0; - - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 * next0) -{ - /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */ - if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag) - { - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - return SCTP_ERROR_INVALID_TAG; - } - - sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0); - - *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4); - - return SCTP_ERROR_NONE; -} - -always_inline u16 -sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk, - sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0, u16 * next0) -{ - sctp_conn->sub_conn[idx].last_seen = sctp_time_now (); - - sctp_conn->sub_conn[idx].unacknowledged_hb -= 1; - - sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT, - sctp_conn->sub_conn[idx].RTO); - - *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4); - - return SCTP_ERROR_NONE; -} - -always_inline void -sctp_node_inc_counter (vlib_main_t * vm, u32 sctp4_node, u32 sctp6_node, - u8 is_ip4, u8 evt, u8 val) -{ - if (PREDICT_TRUE (!val)) - return; - - if (is_ip4) - vlib_node_increment_counter (vm, sctp4_node, evt, val); - else - vlib_node_increment_counter (vm, sctp6_node, evt, val); -} - -always_inline uword -sctp46_listen_process_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip4) -{ - u32 n_left_from, next_index, *from, *to_next; - u32 my_thread_index = vm->thread_index; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - sctp_header_t *sctp_hdr = 0; - ip4_header_t *ip4_hdr; - ip6_header_t *ip6_hdr; - sctp_connection_t *child_conn; - sctp_connection_t *sctp_listener; - u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED; - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - sctp_listener = - sctp_listener_get (sctp_buffer_opaque (b0)-> - sctp.connection_index); - - if (is_ip4) - { - ip4_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip4_next_header (ip4_hdr); - } - else - { - ip6_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip6_next_header (ip6_hdr); - } - - child_conn = - sctp_lookup_connection (sctp_listener->sub_conn - [SCTP_PRIMARY_PATH_IDX].c_fib_index, b0, - my_thread_index, is_ip4); - - if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED)) - { - SCTP_DBG - ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s", - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX]. - connection.c_index, - sctp_state_to_string (child_conn->state)); - error0 = SCTP_ERROR_CREATE_EXISTS; - goto drop; - } - - /* Create child session and send SYN-ACK */ - child_conn = sctp_connection_new (my_thread_index); - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx = - SCTP_PRIMARY_PATH_IDX; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_port = - sctp_hdr->dst_port; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_port = - sctp_hdr->src_port; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_is_ip4 = is_ip4; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto = - sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU = - sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU; - child_conn->state = SCTP_STATE_CLOSED; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.fib_index = - sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX]. - connection.fib_index; - - if (is_ip4) - { - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip4.as_u32 = - ip4_hdr->dst_address.as_u32; - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip4.as_u32 = - ip4_hdr->src_address.as_u32; - } - else - { - clib_memcpy_fast (&child_conn-> - sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip6, - &ip6_hdr->dst_address, - sizeof (ip6_address_t)); - clib_memcpy_fast (&child_conn-> - sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip6, - &ip6_hdr->src_address, - sizeof (ip6_address_t)); - } - - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr; - - u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr); - if (chunk_type != INIT && chunk_type != DATA - && chunk_type != OPERATION_ERROR) - { - SCTP_DBG - ("conn_index = %u: chunk_type != INIT... chunk_type=%s", - child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX]. - connection.c_index, sctp_chunk_to_string (chunk_type)); - - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = sctp_next_drop (is_ip4); - goto drop; - } - - u16 sctp_implied_length = - sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4); - - switch (chunk_type) - { - case INIT: - sctp_connection_timers_init (child_conn); - - sctp_init_snd_vars (child_conn); - - sctp_init_cwnd (child_conn); - - error0 = - sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0, - sctp_implied_length); - - if (error0 == SCTP_ERROR_NONE) - { - if (session_stream_accept - (&child_conn-> - sub_conn[SCTP_PRIMARY_PATH_IDX].connection, - sctp_listener-> - sub_conn[SCTP_PRIMARY_PATH_IDX].c_s_index, - sctp_listener-> - sub_conn[SCTP_PRIMARY_PATH_IDX].c_thread_index, 0)) - { - clib_warning ("session accept fail"); - sctp_connection_cleanup (child_conn); - error0 = SCTP_ERROR_CREATE_SESSION_FAIL; - goto drop; - } - next0 = sctp_next_output (is_ip4); - } - break; - - /* Reception of a DATA chunk whilst in the CLOSED state is called - * "Out of the Blue" packet and handling of the chunk needs special treatment - * as per RFC4960 section 8.4 - */ - case DATA: - break; - - case OPERATION_ERROR: - error0 = - sctp_handle_operation_err (sctp_hdr, child_conn, - SCTP_PRIMARY_PATH_IDX, b0, &next0); - break; - } - - drop: - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - sctp_rx_trace_t *t0 = - vlib_add_trace (vm, node, b0, sizeof (*t0)); - clib_memcpy_fast (&t0->sctp_header, sctp_hdr, - sizeof (t0->sctp_header)); - clib_memcpy_fast (&t0->sctp_connection, sctp_listener, - sizeof (t0->sctp_connection)); - } - - b0->error = node->errors[error0]; - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - - } - return from_frame->n_vectors; -} - -VLIB_NODE_FN (sctp4_listen_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ ); -} - -VLIB_NODE_FN (sctp6_listen_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ ); -} - -always_inline uword -sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip4) -{ - sctp_main_t *sm = vnet_get_sctp_main (); - u32 n_left_from, next_index, *from, *to_next; - u32 my_thread_index = vm->thread_index, errors = 0; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - sctp_header_t *sctp_hdr = 0; - sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0; - ip4_header_t *ip4_hdr = 0; - ip6_header_t *ip6_hdr = 0; - sctp_connection_t *sctp_conn; - u16 error0 = SCTP_ERROR_ENQUEUED, next0 = - SCTP_ESTABLISHED_PHASE_N_NEXT; - u8 idx; - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - sctp_conn = - sctp_connection_get (sctp_buffer_opaque (b0)-> - sctp.connection_index, my_thread_index); - - if (PREDICT_FALSE (sctp_conn == 0)) - { - SCTP_DBG - ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION"); - error0 = SCTP_ERROR_INVALID_CONNECTION; - goto done; - } - if (is_ip4) - { - ip4_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip4_next_header (ip4_hdr); - idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr); - } - else - { - ip6_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip6_next_header (ip6_hdr); - idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr); - } - - sctp_conn->sub_conn[idx].subconn_idx = idx; - - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - sctp_chunk_hdr = - (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr); - - u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr); - - switch (chunk_type) - { - case COOKIE_ECHO: - error0 = - sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn, - idx, b0, &next0); - break; - - case COOKIE_ACK: - error0 = - sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn, - idx, b0, &next0); - break; - - case SACK: - error0 = - sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr, - sctp_conn, idx, b0, &next0); - break; - - case HEARTBEAT: - error0 = - sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr, - sctp_conn, idx, b0, &next0); - break; - - case HEARTBEAT_ACK: - error0 = - sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr, - sctp_conn, idx, b0, &next0); - break; - - case DATA: - error0 = - sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr, - sctp_conn, idx, b0, &next0); - break; - - case OPERATION_ERROR: - error0 = - sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0, - &next0); - break; - - /* All UNEXPECTED scenarios (wrong chunk received per state-machine) - * are handled by the input-dispatcher function using the table-lookup - * hence we should never get to the "default" case below. - */ - default: - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = sctp_next_drop (is_ip4); - goto done; - } - - done: - b0->error = node->errors[error0]; - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - sctp_rx_trace_t *t0 = - vlib_add_trace (vm, node, b0, sizeof (*t0)); - sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4); - } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_SCTP, - my_thread_index); - - sctp_node_inc_counter (vm, is_ip4, sm->sctp4_established_phase_node_index, - sm->sctp6_established_phase_node_index, - SCTP_ERROR_EVENT_FIFO_FULL, errors); - sctp_flush_frame_to_output (vm, my_thread_index, is_ip4); - - return from_frame->n_vectors; -} - -VLIB_NODE_FN (sctp4_established_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_established_phase_inline (vm, node, from_frame, - 1 /* is_ip4 */ ); -} - -VLIB_NODE_FN (sctp6_established_phase_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_established_phase_inline (vm, node, from_frame, - 0 /* is_ip4 */ ); -} - -static u8 * -format_sctp_rx_trace (u8 * s, va_list * args) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *); - u32 indent = format_get_indent (s); - - s = format (s, "%U\n%U%U", - format_sctp_header, &t->sctp_header, 128, - format_white_space, indent, - format_sctp_connection, &t->sctp_connection, 1); - - return s; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp4_listen_phase_node) = -{ - .name = "sctp4-listen", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp6_listen_phase_node) = -{ - .name = "sctp6-listen", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp4_established_phase_node) = -{ - .name = "sctp4-established", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp6_established_phase_node) = -{ - .name = "sctp6-established", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n, - foreach_sctp_state_next -#undef _ - }, - .format_trace = format_sctp_rx_trace_short, -}; -/* *INDENT-ON* */ - -/* - * This is the function executed first for the SCTP graph. - * It takes care of doing the initial message parsing and - * dispatch to the specialized function. - */ -always_inline uword -sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip4) -{ - u32 n_left_from, next_index, *from, *to_next; - u32 my_thread_index = vm->thread_index; - u8 result; - sctp_main_t *tm = vnet_get_sctp_main (); - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - next_index = node->cached_next_index; - sctp_set_time_now (my_thread_index); - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - int n_advance_bytes0, n_data_bytes0; - u32 bi0, fib_index0; - vlib_buffer_t *b0; - sctp_header_t *sctp_hdr = 0; - sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0; - sctp_connection_t *sctp_conn; - transport_connection_t *trans_conn; - ip4_header_t *ip4_hdr; - ip6_header_t *ip6_hdr; - u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP; - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - sctp_buffer_opaque (b0)->sctp.flags = 0; - fib_index0 = vnet_buffer (b0)->ip.fib_index; - - /* Checksum computed by ipx_local no need to compute again */ - - if (is_ip4) - { - ip4_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip4_next_header (ip4_hdr); - - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - sctp_chunk_hdr = &full_hdr->common_hdr; - - n_advance_bytes0 = - (ip4_header_bytes (ip4_hdr) + - sizeof (sctp_payload_data_chunk_t)); - n_data_bytes0 = - clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0; - - trans_conn = session_lookup_connection_wt4 (fib_index0, - &ip4_hdr->dst_address, - &ip4_hdr->src_address, - sctp_hdr->dst_port, - sctp_hdr->src_port, - TRANSPORT_PROTO_SCTP, - my_thread_index, - &result); - } - else - { - ip6_hdr = vlib_buffer_get_current (b0); - sctp_hdr = ip6_next_header (ip6_hdr); - - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - sctp_chunk_hdr = &full_hdr->common_hdr; - - n_advance_bytes0 = sctp_header_bytes (); - n_data_bytes0 = - clib_net_to_host_u16 (ip6_hdr->payload_length) - - n_advance_bytes0; - n_advance_bytes0 += sizeof (ip6_hdr[0]); - - trans_conn = session_lookup_connection_wt6 (fib_index0, - &ip6_hdr->dst_address, - &ip6_hdr->src_address, - sctp_hdr->dst_port, - sctp_hdr->src_port, - TRANSPORT_PROTO_SCTP, - my_thread_index, - &result); - } - - /* Length check */ - if (PREDICT_FALSE (n_advance_bytes0 < 0)) - { - error0 = SCTP_ERROR_LENGTH; - goto done; - } - - sctp_conn = sctp_get_connection_from_transport (trans_conn); - vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr); - - u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr); - if (chunk_type >= UNKNOWN) - { - clib_warning - ("Received an unrecognized chunk; sending back OPERATION_ERROR chunk"); - - sctp_prepare_operation_error (sctp_conn, SCTP_PRIMARY_PATH_IDX, - b0, UNRECOGNIZED_CHUNK_TYPE); - - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = sctp_next_output (is_ip4); - goto done; - } - - sctp_buffer_opaque (b0)->sctp.hdr_offset = - (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0); - - /* Session exists */ - if (PREDICT_TRUE (0 != sctp_conn)) - { - /* Save connection index */ - sctp_buffer_opaque (b0)->sctp.connection_index - = trans_conn->c_index; - sctp_buffer_opaque (b0)->sctp.data_offset = n_advance_bytes0; - sctp_buffer_opaque (b0)->sctp.data_len = n_data_bytes0; - - next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next; - error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error; - - SCTP_DBG_STATE_MACHINE - ("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s," - "CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s", - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX]. - connection.s_index, - sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX]. - connection.c_index, trans_conn, sctp_conn, - sctp_state_to_string (sctp_conn->state), - sctp_chunk_to_string (chunk_type), phase_to_string (next0)); - - if (chunk_type == DATA) - SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u", - n_advance_bytes0, n_data_bytes0); - - } - else - { - if (result) - { - next0 = SCTP_INPUT_NEXT_DROP; - error0 = SCTP_ERROR_NONE + result; - } - else if ((is_ip4 && tm->punt_unknown4) || - (!is_ip4 && tm->punt_unknown6)) - { - next0 = SCTP_INPUT_NEXT_PUNT_PHASE; - error0 = SCTP_ERROR_PUNT; - } - else - { - next0 = SCTP_INPUT_NEXT_DROP; - error0 = SCTP_ERROR_NO_LISTENER; - } - SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s", - phase_to_string (next0)); - sctp_conn = 0; - } - - done: - b0->error = error0 ? node->errors[error0] : 0; - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - sctp_rx_trace_t *t0 = - vlib_add_trace (vm, node, b0, sizeof (*t0)); - sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4); - } - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - return from_frame->n_vectors; -} - -VLIB_NODE_FN (sctp4_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ ); -} - -VLIB_NODE_FN (sctp6_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ ); -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp4_input_node) = -{ - .name = "sctp4-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_INPUT_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_INPUT_NEXT_##s] = n, - foreach_sctp4_input_next -#undef _ - }, - .format_buffer = format_sctp_header, - .format_trace = format_sctp_rx_trace, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp6_input_node) = -{ - .name = "sctp6-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_INPUT_N_NEXT, - .next_nodes = - { -#define _(s,n) [SCTP_INPUT_NEXT_##s] = n, - foreach_sctp6_input_next -#undef _ - }, - .format_buffer = format_sctp_header, - .format_trace = format_sctp_rx_trace, -}; -/* *INDENT-ON* */ - -#ifndef CLIB_MARCH_VARIANT -static void -sctp_dispatch_table_init (sctp_main_t * tm) -{ - int i, j; - for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++) - for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++) - { - tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP; - tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH; - } - -#define _(t,f,n,e) \ -do { \ - tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \ - tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \ -} while (0) - - /* - * SCTP STATE-MACHINE states: - * - * _(CLOSED, "CLOSED") \ - * _(COOKIE_WAIT, "COOKIE_WAIT") \ - * _(COOKIE_ECHOED, "COOKIE_ECHOED") \ - * _(ESTABLISHED, "ESTABLISHED") \ - * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \ - * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \ - * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \ - * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT") - */ - //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */ - _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); - _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */ - _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */ - _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */ - _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); - _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */ - _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */ - _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */ - _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE); - _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); - - _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */ - _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */ - _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); - _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */ - _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */ - _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */ - _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); - _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */ - _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */ - _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */ - _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */ - _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); - _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */ - _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */ - _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */ - _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */ - _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */ - _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */ - _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */ - _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */ - _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */ - _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, - SCTP_ERROR_NONE); - _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE); - _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */ - _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE); - _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, - SCTP_ERROR_NONE); - _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, - SCTP_ERROR_NONE); - _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */ - _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE); - _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */ - _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */ - _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */ - _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE); - _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */ - _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); - _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */ - _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */ - _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */ - _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE); - _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */ - _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */ - _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */ - _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */ - _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */ - _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE); - _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(SHUTDOWN_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */ - _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */ - _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */ - _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */ - _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */ - _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */ - _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */ - _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */ - _(SHUTDOWN_RECEIVED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */ - _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk */ - _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */ - _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */ - _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */ - _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */ - _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */ - _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */ - _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */ - _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */ - _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */ - _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */ - _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, - SCTP_ERROR_NONE); - _(SHUTDOWN_ACK_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, - SCTP_ERROR_NONE); - - /* TODO: Handle COOKIE ECHO when a TCB Exists */ - -#undef _ -} - -clib_error_t * -sctp_input_init (vlib_main_t * vm) -{ - clib_error_t *error = 0; - sctp_main_t *tm = vnet_get_sctp_main (); - - if ((error = vlib_call_init_function (vm, sctp_init))) - return error; - - /* Initialize dispatch table. */ - sctp_dispatch_table_init (tm); - - return error; -} - -VLIB_INIT_FUNCTION (sctp_input_init); -#endif /* CLIB_MARCH_VARIANT */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_output.c b/src/plugins/sctp/sctp_output.c deleted file mode 100644 index 955010a34b3..00000000000 --- a/src/plugins/sctp/sctp_output.c +++ /dev/null @@ -1,1568 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include <sctp/sctp.h> -#include <sctp/sctp_debug.h> -#include <vppinfra/random.h> -#include <openssl/hmac.h> - -/** - * Flush tx frame populated by retransmits and timer pops - */ -void -sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, u8 is_ip4) -{ - if (sctp_main.tx_frames[!is_ip4][thread_index]) - { - u32 next_index; - next_index = is_ip4 ? sctp4_output_node.index : sctp6_output_node.index; - vlib_put_frame_to_node (vm, next_index, - sctp_main.tx_frames[!is_ip4][thread_index]); - sctp_main.tx_frames[!is_ip4][thread_index] = 0; - } -} - -/** - * Flush ip lookup tx frames populated by timer pops - */ -always_inline void -sctp_flush_frame_to_ip_lookup (vlib_main_t * vm, u8 thread_index, u8 is_ip4) -{ - if (sctp_main.ip_lookup_tx_frames[!is_ip4][thread_index]) - { - u32 next_index; - next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index; - vlib_put_frame_to_node (vm, next_index, - sctp_main.ip_lookup_tx_frames[!is_ip4] - [thread_index]); - sctp_main.ip_lookup_tx_frames[!is_ip4][thread_index] = 0; - } -} - -/** - * Flush v4 and v6 sctp and ip-lookup tx frames for thread index - */ -void -sctp_flush_frames_to_output (u8 thread_index) -{ - vlib_main_t *vm = vlib_get_main (); - sctp_flush_frame_to_output (vm, thread_index, 1); - sctp_flush_frame_to_output (vm, thread_index, 0); - sctp_flush_frame_to_ip_lookup (vm, thread_index, 1); - sctp_flush_frame_to_ip_lookup (vm, thread_index, 0); -} - -u32 -ip4_sctp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, - ip4_header_t * ip0) -{ - ip_csum_t checksum; - u32 ip_header_length, payload_length_host_byte_order; - u32 n_this_buffer, n_bytes_left, n_ip_bytes_this_buffer; - void *data_this_buffer; - - /* Initialize checksum with ip header. */ - ip_header_length = ip4_header_bytes (ip0); - payload_length_host_byte_order = - clib_net_to_host_u16 (ip0->length) - ip_header_length; - checksum = - clib_host_to_net_u32 (payload_length_host_byte_order + - (ip0->protocol << 16)); - - if (BITS (uword) == 32) - { - checksum = - ip_csum_with_carry (checksum, - clib_mem_unaligned (&ip0->src_address, u32)); - checksum = - ip_csum_with_carry (checksum, - clib_mem_unaligned (&ip0->dst_address, u32)); - } - else - checksum = - ip_csum_with_carry (checksum, - clib_mem_unaligned (&ip0->src_address, u64)); - - n_bytes_left = n_this_buffer = payload_length_host_byte_order; - data_this_buffer = (void *) ip0 + ip_header_length; - n_ip_bytes_this_buffer = - p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data); - if (n_this_buffer + ip_header_length > n_ip_bytes_this_buffer) - { - n_this_buffer = n_ip_bytes_this_buffer > ip_header_length ? - n_ip_bytes_this_buffer - ip_header_length : 0; - } - while (1) - { - checksum = - ip_incremental_checksum (checksum, data_this_buffer, n_this_buffer); - n_bytes_left -= n_this_buffer; - if (n_bytes_left == 0) - break; - - ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT); - p0 = vlib_get_buffer (vm, p0->next_buffer); - data_this_buffer = vlib_buffer_get_current (p0); - n_this_buffer = p0->current_length; - } - - return checksum; -} - -u32 -ip6_sctp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, - ip6_header_t * ip0, int *bogus_lengthp) -{ - ip_csum_t checksum; - u16 payload_length_host_byte_order; - u32 i, n_this_buffer, n_bytes_left; - u32 headers_size = sizeof (ip0[0]); - void *data_this_buffer; - - ASSERT (bogus_lengthp); - *bogus_lengthp = 0; - - /* Initialize checksum with ip header. */ - checksum = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol); - payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length); - data_this_buffer = (void *) (ip0 + 1); - - for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++) - { - checksum = ip_csum_with_carry (checksum, - clib_mem_unaligned (&ip0-> - src_address.as_uword - [i], uword)); - checksum = - ip_csum_with_carry (checksum, - clib_mem_unaligned (&ip0->dst_address.as_uword[i], - uword)); - } - - /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) - * or UDP-Ping packets */ - if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)) - { - u32 skip_bytes; - ip6_hop_by_hop_ext_t *ext_hdr = - (ip6_hop_by_hop_ext_t *) data_this_buffer; - - /* validate really icmp6 next */ - ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_SCTP)); - - skip_bytes = 8 * (1 + ext_hdr->n_data_u64s); - data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes); - - payload_length_host_byte_order -= skip_bytes; - headers_size += skip_bytes; - } - - n_bytes_left = n_this_buffer = payload_length_host_byte_order; - if (p0 && n_this_buffer + headers_size > p0->current_length) - n_this_buffer = - p0->current_length > - headers_size ? p0->current_length - headers_size : 0; - while (1) - { - checksum = - ip_incremental_checksum (checksum, data_this_buffer, n_this_buffer); - n_bytes_left -= n_this_buffer; - if (n_bytes_left == 0) - break; - - if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT)) - { - *bogus_lengthp = 1; - return 0xfefe; - } - p0 = vlib_get_buffer (vm, p0->next_buffer); - data_this_buffer = vlib_buffer_get_current (p0); - n_this_buffer = p0->current_length; - } - - return checksum; -} - -void -sctp_push_ip_hdr (sctp_main_t * tm, sctp_sub_connection_t * sctp_sub_conn, - vlib_buffer_t * b) -{ - sctp_header_t *th = vlib_buffer_get_current (b); - vlib_main_t *vm = vlib_get_main (); - if (sctp_sub_conn->c_is_ip4) - { - ip4_header_t *ih; - ih = vlib_buffer_push_ip4 (vm, b, &sctp_sub_conn->c_lcl_ip4, - &sctp_sub_conn->c_rmt_ip4, IP_PROTOCOL_SCTP, - 1); - th->checksum = ip4_sctp_compute_checksum (vm, b, ih); - } - else - { - ip6_header_t *ih; - int bogus = ~0; - - ih = vlib_buffer_push_ip6 (vm, b, &sctp_sub_conn->c_lcl_ip6, - &sctp_sub_conn->c_rmt_ip6, IP_PROTOCOL_SCTP); - th->checksum = ip6_sctp_compute_checksum (vm, b, ih, &bogus); - ASSERT (!bogus); - } -} - -always_inline void * -sctp_reuse_buffer (vlib_main_t * vm, vlib_buffer_t * b) -{ - if (b->flags & VLIB_BUFFER_NEXT_PRESENT) - vlib_buffer_free_one (vm, b->next_buffer); - /* Zero all flags but free list index and trace flag */ - b->flags &= VLIB_BUFFER_NEXT_PRESENT - 1; - b->current_data = 0; - b->current_length = 0; - b->total_length_not_including_first_buffer = 0; - sctp_buffer_opaque (b)->sctp.flags = 0; - sctp_buffer_opaque (b)->sctp.subconn_idx = MAX_SCTP_CONNECTIONS; - - /* Leave enough space for headers */ - return vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN); -} - -always_inline void * -sctp_init_buffer (vlib_main_t * vm, vlib_buffer_t * b) -{ - ASSERT ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0); - b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - b->total_length_not_including_first_buffer = 0; - sctp_buffer_opaque (b)->sctp.flags = 0; - sctp_buffer_opaque (b)->sctp.subconn_idx = MAX_SCTP_CONNECTIONS; - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b); - /* Leave enough space for headers */ - return vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN); -} - -always_inline int -sctp_alloc_tx_buffers (sctp_main_t * tm, u8 thread_index, u32 n_free_buffers) -{ - vlib_main_t *vm = vlib_get_main (); - u32 current_length = vec_len (tm->tx_buffers[thread_index]); - u32 n_allocated; - - vec_validate (tm->tx_buffers[thread_index], - current_length + n_free_buffers - 1); - n_allocated = - vlib_buffer_alloc (vm, &tm->tx_buffers[thread_index][current_length], - n_free_buffers); - _vec_len (tm->tx_buffers[thread_index]) = current_length + n_allocated; - /* buffer shortage, report failure */ - if (vec_len (tm->tx_buffers[thread_index]) == 0) - { - clib_warning ("out of buffers"); - return -1; - } - return 0; -} - -always_inline int -sctp_get_free_buffer_index (sctp_main_t * tm, u32 * bidx) -{ - u32 *my_tx_buffers; - u32 thread_index = vlib_get_thread_index (); - if (PREDICT_FALSE (vec_len (tm->tx_buffers[thread_index]) == 0)) - { - if (sctp_alloc_tx_buffers (tm, thread_index, VLIB_FRAME_SIZE)) - return -1; - } - my_tx_buffers = tm->tx_buffers[thread_index]; - *bidx = my_tx_buffers[vec_len (my_tx_buffers) - 1]; - _vec_len (my_tx_buffers) -= 1; - return 0; -} - -always_inline void -sctp_enqueue_to_output_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, - u8 is_ip4, u8 flush) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - u32 thread_index = vlib_get_thread_index (); - u32 *to_next, next_index; - vlib_frame_t *f; - - b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - b->error = 0; - - /* Decide where to send the packet */ - next_index = is_ip4 ? sctp4_output_node.index : sctp6_output_node.index; - sctp_trajectory_add_start (b, 2); - - /* Get frame to v4/6 output node */ - f = tm->tx_frames[!is_ip4][thread_index]; - if (!f) - { - f = vlib_get_frame_to_node (vm, next_index); - ASSERT (f); - tm->tx_frames[!is_ip4][thread_index] = f; - } - to_next = vlib_frame_vector_args (f); - to_next[f->n_vectors] = bi; - f->n_vectors += 1; - if (flush || f->n_vectors == VLIB_FRAME_SIZE) - { - vlib_put_frame_to_node (vm, next_index, f); - tm->tx_frames[!is_ip4][thread_index] = 0; - } -} - -always_inline void -sctp_enqueue_to_output_now (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, - u8 is_ip4) -{ - sctp_enqueue_to_output_i (vm, b, bi, is_ip4, 1); -} - -always_inline void -sctp_enqueue_to_ip_lookup_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, - u8 is_ip4, u32 fib_index, u8 flush) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - u32 thread_index = vlib_get_thread_index (); - u32 *to_next, next_index; - vlib_frame_t *f; - - b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - b->error = 0; - - vnet_buffer (b)->sw_if_index[VLIB_TX] = fib_index; - vnet_buffer (b)->sw_if_index[VLIB_RX] = 0; - - /* Send to IP lookup */ - next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index; - if (VLIB_BUFFER_TRACE_TRAJECTORY > 0) - { - b->pre_data[0] = 2; - b->pre_data[1] = next_index; - } - - f = tm->ip_lookup_tx_frames[!is_ip4][thread_index]; - if (!f) - { - f = vlib_get_frame_to_node (vm, next_index); - ASSERT (f); - tm->ip_lookup_tx_frames[!is_ip4][thread_index] = f; - } - - to_next = vlib_frame_vector_args (f); - to_next[f->n_vectors] = bi; - f->n_vectors += 1; - if (flush || f->n_vectors == VLIB_FRAME_SIZE) - { - vlib_put_frame_to_node (vm, next_index, f); - tm->ip_lookup_tx_frames[!is_ip4][thread_index] = 0; - } -} - -always_inline void -sctp_enqueue_to_ip_lookup (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, - u8 is_ip4, u32 fib_index) -{ - sctp_enqueue_to_ip_lookup_i (vm, b, bi, is_ip4, fib_index, 0); - if (vm->thread_index == 0 && vlib_num_workers ()) - session_flush_frames_main_thread (vm); -} - -/** - * Convert buffer to INIT - */ -void -sctp_prepare_init_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - u32 random_seed = random_default_seed (); - u16 alloc_bytes = sizeof (sctp_init_chunk_t); - sctp_sub_connection_t *sub_conn = &sctp_conn->sub_conn[idx]; - - sctp_ipv4_addr_param_t *ip4_param = 0; - sctp_ipv6_addr_param_t *ip6_param = 0; - - if (sub_conn->c_is_ip4) - alloc_bytes += sizeof (sctp_ipv4_addr_param_t); - else - alloc_bytes += sizeof (sctp_ipv6_addr_param_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_init_chunk_t *init_chunk = vlib_buffer_push_uninit (b, alloc_bytes); - - u16 pointer_offset = sizeof (init_chunk); - if (sub_conn->c_is_ip4) - { - ip4_param = (sctp_ipv4_addr_param_t *) init_chunk + pointer_offset; - ip4_param->address.as_u32 = sub_conn->c_lcl_ip.ip4.as_u32; - - pointer_offset += sizeof (sctp_ipv4_addr_param_t); - } - else - { - ip6_param = (sctp_ipv6_addr_param_t *) init_chunk + pointer_offset; - ip6_param->address.as_u64[0] = sub_conn->c_lcl_ip.ip6.as_u64[0]; - ip6_param->address.as_u64[1] = sub_conn->c_lcl_ip.ip6.as_u64[1]; - - pointer_offset += sizeof (sctp_ipv6_addr_param_t); - } - - init_chunk->sctp_hdr.src_port = sub_conn->c_lcl_port; /* No need of host_to_net conversion, already in net-byte order */ - init_chunk->sctp_hdr.dst_port = sub_conn->c_rmt_port; /* No need of host_to_net conversion, already in net-byte order */ - init_chunk->sctp_hdr.checksum = 0; - /* The sender of an INIT must set the VERIFICATION_TAG to 0 as per RFC 4960 Section 8.5.1 */ - init_chunk->sctp_hdr.verification_tag = 0x0; - - vnet_sctp_set_chunk_type (&init_chunk->chunk_hdr, INIT); - vnet_sctp_set_chunk_length (&init_chunk->chunk_hdr, chunk_len); - vnet_sctp_common_hdr_params_host_to_net (&init_chunk->chunk_hdr); - - sctp_init_cwnd (sctp_conn); - - init_chunk->a_rwnd = clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd); - init_chunk->initiate_tag = clib_host_to_net_u32 (random_u32 (&random_seed)); - init_chunk->inboud_streams_count = - clib_host_to_net_u16 (INBOUND_STREAMS_COUNT); - init_chunk->outbound_streams_count = - clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT); - - init_chunk->initial_tsn = - clib_host_to_net_u32 (sctp_conn->local_initial_tsn); - SCTP_CONN_TRACKING_DBG ("sctp_conn->local_initial_tsn = %u", - sctp_conn->local_initial_tsn); - - sctp_conn->local_tag = init_chunk->initiate_tag; - - sctp_buffer_opaque (b)->sctp.connection_index = sub_conn->c_c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; - - SCTP_DBG_STATE_MACHINE ("CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), " - "CHUNK_TYPE = %s, " - "SRC_PORT = %u, DST_PORT = %u", - sub_conn->connection.c_index, - sctp_conn->state, - sctp_state_to_string (sctp_conn->state), - sctp_chunk_to_string (INIT), - init_chunk->sctp_hdr.src_port, - init_chunk->sctp_hdr.dst_port); -} - -void -sctp_compute_mac (sctp_connection_t * sctp_conn, - sctp_state_cookie_param_t * state_cookie) -{ -#if OPENSSL_VERSION_NUMBER >= 0x10100000L - HMAC_CTX *ctx; -#else - HMAC_CTX ctx; -#endif - unsigned int len = 0; - const EVP_MD *md = EVP_sha1 (); -#if OPENSSL_VERSION_NUMBER >= 0x10100000L - ctx = HMAC_CTX_new (); - HMAC_Init_ex (ctx, &state_cookie->creation_time, - sizeof (state_cookie->creation_time), md, NULL); - HMAC_Update (ctx, (const unsigned char *) &sctp_conn, sizeof (sctp_conn)); - HMAC_Final (ctx, state_cookie->mac, &len); -#else - HMAC_CTX_init (&ctx); - HMAC_Init_ex (&ctx, &state_cookie->creation_time, - sizeof (state_cookie->creation_time), md, NULL); - HMAC_Update (&ctx, (const unsigned char *) &sctp_conn, sizeof (sctp_conn)); - HMAC_Final (&ctx, state_cookie->mac, &len); - HMAC_CTX_cleanup (&ctx); -#endif - - ENDIANESS_SWAP (state_cookie->mac); -} - -void -sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - vlib_main_t *vm = vlib_get_main (); - - sctp_reuse_buffer (vm, b); - - u16 alloc_bytes = sizeof (sctp_cookie_ack_chunk_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_cookie_ack_chunk_t *cookie_ack_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - - cookie_ack_chunk->sctp_hdr.checksum = 0; - cookie_ack_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - cookie_ack_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - cookie_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - vnet_sctp_set_chunk_type (&cookie_ack_chunk->chunk_hdr, COOKIE_ACK); - vnet_sctp_set_chunk_length (&cookie_ack_chunk->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -void -sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, u8 reuse_buffer) -{ - vlib_main_t *vm = vlib_get_main (); - - if (reuse_buffer) - sctp_reuse_buffer (vm, b); - - /* The minimum size of the message is given by the sctp_init_ack_chunk_t */ - u16 alloc_bytes = sizeof (sctp_cookie_echo_chunk_t); - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - sctp_cookie_echo_chunk_t *cookie_echo_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - cookie_echo_chunk->sctp_hdr.checksum = 0; - cookie_echo_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - cookie_echo_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - cookie_echo_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - vnet_sctp_set_chunk_type (&cookie_echo_chunk->chunk_hdr, COOKIE_ECHO); - vnet_sctp_set_chunk_length (&cookie_echo_chunk->chunk_hdr, chunk_len); - clib_memcpy_fast (&(cookie_echo_chunk->cookie), &sctp_conn->cookie_param, - sizeof (sctp_state_cookie_param_t)); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - - -/* - * Send COOKIE_ECHO - */ -void -sctp_send_cookie_echo (sctp_connection_t * sctp_conn) -{ - vlib_buffer_t *b; - u32 bi; - sctp_main_t *tm = vnet_get_sctp_main (); - vlib_main_t *vm = vlib_get_main (); - - if (PREDICT_FALSE (sctp_conn->init_retransmit_err > SCTP_MAX_INIT_RETRANS)) - { - clib_warning ("Reached MAX_INIT_RETRANS times. Aborting connection."); - - session_stream_connect_notify (&sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection, 1); - - sctp_connection_timers_reset (sctp_conn); - - sctp_connection_cleanup (sctp_conn); - } - - if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi))) - return; - - b = vlib_get_buffer (vm, bi); - u8 idx = SCTP_PRIMARY_PATH_IDX; - - sctp_init_buffer (vm, b); - sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b, 0); - sctp_enqueue_to_output_now (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4); - - /* Start the T1_INIT timer */ - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT, - sctp_conn->sub_conn[idx].RTO); - - /* Change state to COOKIE_WAIT */ - sctp_conn->state = SCTP_STATE_COOKIE_WAIT; - - /* Measure RTT with this */ - sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now (); -} - - -/** - * Convert buffer to ERROR - */ -void -sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, u8 err_cause) -{ - vlib_main_t *vm = vlib_get_main (); - - sctp_reuse_buffer (vm, b); - - /* The minimum size of the message is given by the sctp_operation_error_t */ - u16 alloc_bytes = - sizeof (sctp_operation_error_t) + sizeof (sctp_err_cause_param_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_operation_error_t *err_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - - /* src_port & dst_port are already in network byte-order */ - err_chunk->sctp_hdr.checksum = 0; - err_chunk->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port; - err_chunk->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port; - /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */ - err_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag; - - err_chunk->err_causes[0].param_hdr.length = - clib_host_to_net_u16 (sizeof (err_chunk->err_causes[0].param_hdr.type) + - sizeof (err_chunk->err_causes[0].param_hdr.length)); - err_chunk->err_causes[0].param_hdr.type = clib_host_to_net_u16 (err_cause); - - vnet_sctp_set_chunk_type (&err_chunk->chunk_hdr, OPERATION_ERROR); - vnet_sctp_set_chunk_length (&err_chunk->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/** - * Convert buffer to ABORT - */ -void -sctp_prepare_abort_for_collision (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, ip4_address_t * ip4_addr, - ip6_address_t * ip6_addr) -{ - vlib_main_t *vm = vlib_get_main (); - - sctp_reuse_buffer (vm, b); - - /* The minimum size of the message is given by the sctp_abort_chunk_t */ - u16 alloc_bytes = sizeof (sctp_abort_chunk_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_abort_chunk_t *abort_chunk = vlib_buffer_push_uninit (b, alloc_bytes); - - /* src_port & dst_port are already in network byte-order */ - abort_chunk->sctp_hdr.checksum = 0; - abort_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - abort_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */ - abort_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag; - - vnet_sctp_set_chunk_type (&abort_chunk->chunk_hdr, ABORT); - vnet_sctp_set_chunk_length (&abort_chunk->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/** - * Convert buffer to INIT-ACK - */ -void -sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn, - u8 idx, vlib_buffer_t * b, - ip4_address_t * ip4_addr, - ip6_address_t * ip6_addr) -{ - vlib_main_t *vm = vlib_get_main (); - sctp_ipv4_addr_param_t *ip4_param = 0; - sctp_ipv6_addr_param_t *ip6_param = 0; - - sctp_reuse_buffer (vm, b); - - /* The minimum size of the message is given by the sctp_init_ack_chunk_t */ - u16 alloc_bytes = - sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t); - - if (PREDICT_TRUE (ip4_addr != NULL)) - { - /* Create room for variable-length fields in the INIT_ACK chunk */ - alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH; - } - if (PREDICT_TRUE (ip6_addr != NULL)) - { - /* Create room for variable-length fields in the INIT_ACK chunk */ - alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH; - } - - if (sctp_conn->sub_conn[idx].connection.is_ip4) - alloc_bytes += sizeof (sctp_ipv4_addr_param_t); - else - alloc_bytes += sizeof (sctp_ipv6_addr_param_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_init_ack_chunk_t *init_ack_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - - u16 pointer_offset = sizeof (sctp_init_ack_chunk_t); - - /* Create State Cookie parameter */ - sctp_state_cookie_param_t *state_cookie_param = - (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset); - - state_cookie_param->param_hdr.type = - clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE); - state_cookie_param->param_hdr.length = - clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t)); - state_cookie_param->creation_time = clib_host_to_net_u64 (sctp_time_now ()); - state_cookie_param->cookie_lifespan = - clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE); - - sctp_compute_mac (sctp_conn, state_cookie_param); - - pointer_offset += sizeof (sctp_state_cookie_param_t); - - if (PREDICT_TRUE (ip4_addr != NULL)) - { - sctp_ipv4_addr_param_t *ipv4_addr = - (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset; - - ipv4_addr->param_hdr.type = - clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE); - ipv4_addr->param_hdr.length = - clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH); - ipv4_addr->address.as_u32 = ip4_addr->as_u32; - - pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH; - } - if (PREDICT_TRUE (ip6_addr != NULL)) - { - sctp_ipv6_addr_param_t *ipv6_addr = - (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset; - - ipv6_addr->param_hdr.type = - clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE); - ipv6_addr->param_hdr.length = - clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH); - ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0]; - ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1]; - - pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH; - } - - if (sctp_conn->sub_conn[idx].connection.is_ip4) - { - ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset; - ip4_param->address.as_u32 = - sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32; - - pointer_offset += sizeof (sctp_ipv4_addr_param_t); - } - else - { - ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset; - ip6_param->address.as_u64[0] = - sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0]; - ip6_param->address.as_u64[1] = - sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1]; - - pointer_offset += sizeof (sctp_ipv6_addr_param_t); - } - - /* src_port & dst_port are already in network byte-order */ - init_ack_chunk->sctp_hdr.checksum = 0; - init_ack_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - init_ack_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */ - init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - init_ack_chunk->initial_tsn = - clib_host_to_net_u32 (sctp_conn->local_initial_tsn); - SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u", - init_ack_chunk->initial_tsn); - - vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK); - vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len); - - init_ack_chunk->initiate_tag = sctp_conn->local_tag; - - init_ack_chunk->a_rwnd = - clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd); - init_ack_chunk->inboud_streams_count = - clib_host_to_net_u16 (INBOUND_STREAMS_COUNT); - init_ack_chunk->outbound_streams_count = - clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/** - * Convert buffer to INIT-ACK - */ -void -sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b, ip4_address_t * ip4_addr, - u8 add_ip4, ip6_address_t * ip6_addr, u8 add_ip6) -{ - vlib_main_t *vm = vlib_get_main (); - sctp_ipv4_addr_param_t *ip4_param = 0; - sctp_ipv6_addr_param_t *ip6_param = 0; - u32 random_seed = random_default_seed (); - - sctp_reuse_buffer (vm, b); - - /* The minimum size of the message is given by the sctp_init_ack_chunk_t */ - u16 alloc_bytes = - sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t); - - if (PREDICT_FALSE (add_ip4 == 1)) - { - /* Create room for variable-length fields in the INIT_ACK chunk */ - alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH; - } - if (PREDICT_FALSE (add_ip6 == 1)) - { - /* Create room for variable-length fields in the INIT_ACK chunk */ - alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH; - } - - if (sctp_conn->sub_conn[idx].connection.is_ip4) - alloc_bytes += sizeof (sctp_ipv4_addr_param_t); - else - alloc_bytes += sizeof (sctp_ipv6_addr_param_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_init_ack_chunk_t *init_ack_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - - u16 pointer_offset = sizeof (sctp_init_ack_chunk_t); - - /* Create State Cookie parameter */ - sctp_state_cookie_param_t *state_cookie_param = - (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset); - - state_cookie_param->param_hdr.type = - clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE); - state_cookie_param->param_hdr.length = - clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t)); - state_cookie_param->creation_time = clib_host_to_net_u64 (sctp_time_now ()); - state_cookie_param->cookie_lifespan = - clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE); - - sctp_compute_mac (sctp_conn, state_cookie_param); - - pointer_offset += sizeof (sctp_state_cookie_param_t); - - if (PREDICT_TRUE (ip4_addr != NULL)) - { - sctp_ipv4_addr_param_t *ipv4_addr = - (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset; - - ipv4_addr->param_hdr.type = - clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE); - ipv4_addr->param_hdr.length = - clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH); - ipv4_addr->address.as_u32 = ip4_addr->as_u32; - - pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH; - } - if (PREDICT_TRUE (ip6_addr != NULL)) - { - sctp_ipv6_addr_param_t *ipv6_addr = - (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset; - - ipv6_addr->param_hdr.type = - clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE); - ipv6_addr->param_hdr.length = - clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH); - ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0]; - ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1]; - - pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH; - } - - if (sctp_conn->sub_conn[idx].connection.is_ip4) - { - ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset; - ip4_param->address.as_u32 = - sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32; - - pointer_offset += sizeof (sctp_ipv4_addr_param_t); - } - else - { - ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset; - ip6_param->address.as_u64[0] = - sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0]; - ip6_param->address.as_u64[1] = - sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1]; - - pointer_offset += sizeof (sctp_ipv6_addr_param_t); - } - - /* src_port & dst_port are already in network byte-order */ - init_ack_chunk->sctp_hdr.checksum = 0; - init_ack_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - init_ack_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */ - init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - init_ack_chunk->initial_tsn = - clib_host_to_net_u32 (sctp_conn->local_initial_tsn); - SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u", - init_ack_chunk->initial_tsn); - - vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK); - vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len); - - init_ack_chunk->initiate_tag = - clib_host_to_net_u32 (random_u32 (&random_seed)); - - init_ack_chunk->a_rwnd = - clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd); - init_ack_chunk->inboud_streams_count = - clib_host_to_net_u16 (INBOUND_STREAMS_COUNT); - init_ack_chunk->outbound_streams_count = - clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT); - - sctp_conn->local_tag = init_ack_chunk->initiate_tag; - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/** - * Convert buffer to SHUTDOWN - */ -void -sctp_prepare_shutdown_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_shutdown_association_chunk_t *shutdown_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - - shutdown_chunk->sctp_hdr.checksum = 0; - /* No need of host_to_net conversion, already in net-byte order */ - shutdown_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - shutdown_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - shutdown_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - vnet_sctp_set_chunk_type (&shutdown_chunk->chunk_hdr, SHUTDOWN); - vnet_sctp_set_chunk_length (&shutdown_chunk->chunk_hdr, chunk_len); - - shutdown_chunk->cumulative_tsn_ack = sctp_conn->last_rcvd_tsn; - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/* - * Send SHUTDOWN - */ -void -sctp_send_shutdown (sctp_connection_t * sctp_conn) -{ - vlib_buffer_t *b; - u32 bi; - sctp_main_t *tm = vnet_get_sctp_main (); - vlib_main_t *vm = vlib_get_main (); - - if (sctp_check_outstanding_data_chunks (sctp_conn) > 0) - return; - - if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi))) - return; - - u8 idx = SCTP_PRIMARY_PATH_IDX; - - b = vlib_get_buffer (vm, bi); - sctp_init_buffer (vm, b); - sctp_prepare_shutdown_chunk (sctp_conn, idx, b); - - sctp_enqueue_to_output_now (vm, b, bi, - sctp_conn->sub_conn[idx].connection.is_ip4); -} - -/** - * Convert buffer to SHUTDOWN_ACK - */ -void -sctp_prepare_shutdown_ack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t); - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - sctp_shutdown_ack_chunk_t *shutdown_ack_chunk = - vlib_buffer_push_uninit (b, alloc_bytes); - - shutdown_ack_chunk->sctp_hdr.checksum = 0; - /* No need of host_to_net conversion, already in net-byte order */ - shutdown_ack_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - shutdown_ack_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - shutdown_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - - vnet_sctp_set_chunk_type (&shutdown_ack_chunk->chunk_hdr, SHUTDOWN_ACK); - vnet_sctp_set_chunk_length (&shutdown_ack_chunk->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/* - * Send SHUTDOWN_ACK - */ -void -sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - vlib_main_t *vm = vlib_get_main (); - - if (sctp_check_outstanding_data_chunks (sctp_conn) > 0) - return; - - sctp_reuse_buffer (vm, b); - - sctp_prepare_shutdown_ack_chunk (sctp_conn, idx, b); -} - -/** - * Convert buffer to SACK - */ -void -sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - vlib_main_t *vm = vlib_get_main (); - - sctp_reuse_buffer (vm, b); - - u16 alloc_bytes = sizeof (sctp_selective_ack_chunk_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_selective_ack_chunk_t *sack = vlib_buffer_push_uninit (b, alloc_bytes); - - sack->sctp_hdr.checksum = 0; - sack->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port; - sack->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port; - sack->sctp_hdr.verification_tag = sctp_conn->remote_tag; - vnet_sctp_set_chunk_type (&sack->chunk_hdr, SACK); - vnet_sctp_set_chunk_length (&sack->chunk_hdr, chunk_len); - - sack->cumulative_tsn_ack = sctp_conn->next_tsn_expected; - - sctp_conn->ack_state = 0; - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/** - * Convert buffer to HEARTBEAT_ACK - */ -void -sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - vlib_main_t *vm = vlib_get_main (); - - u16 alloc_bytes = sizeof (sctp_hb_ack_chunk_t); - - sctp_reuse_buffer (vm, b); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_hb_ack_chunk_t *hb_ack = vlib_buffer_push_uninit (b, alloc_bytes); - - hb_ack->sctp_hdr.checksum = 0; - /* No need of host_to_net conversion, already in net-byte order */ - hb_ack->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port; - hb_ack->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port; - hb_ack->sctp_hdr.verification_tag = sctp_conn->remote_tag; - hb_ack->hb_info.param_hdr.type = clib_host_to_net_u16 (1); - hb_ack->hb_info.param_hdr.length = - clib_host_to_net_u16 (sizeof (hb_ack->hb_info.hb_info)); - - vnet_sctp_set_chunk_type (&hb_ack->chunk_hdr, HEARTBEAT_ACK); - vnet_sctp_set_chunk_length (&hb_ack->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -/** - * Convert buffer to HEARTBEAT - */ -void -sctp_prepare_heartbeat_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - u16 alloc_bytes = sizeof (sctp_hb_req_chunk_t); - - /* As per RFC 4960 the chunk_length value does NOT contemplate - * the size of the first header (see sctp_header_t) and any padding - */ - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - sctp_hb_req_chunk_t *hb_req = vlib_buffer_push_uninit (b, alloc_bytes); - - hb_req->sctp_hdr.checksum = 0; - /* No need of host_to_net conversion, already in net-byte order */ - hb_req->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port; - hb_req->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port; - hb_req->sctp_hdr.verification_tag = sctp_conn->remote_tag; - hb_req->hb_info.param_hdr.type = clib_host_to_net_u16 (1); - hb_req->hb_info.param_hdr.length = - clib_host_to_net_u16 (sizeof (hb_req->hb_info.hb_info)); - - vnet_sctp_set_chunk_type (&hb_req->chunk_hdr, HEARTBEAT); - vnet_sctp_set_chunk_length (&hb_req->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -void -sctp_send_heartbeat (sctp_connection_t * sctp_conn) -{ - vlib_buffer_t *b; - u32 bi; - sctp_main_t *tm = vnet_get_sctp_main (); - vlib_main_t *vm = vlib_get_main (); - - u8 i; - u64 now = sctp_time_now (); - - for (i = 0; i < MAX_SCTP_CONNECTIONS; i++) - { - if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN) - continue; - - if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL)) - { - if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi))) - return; - - b = vlib_get_buffer (vm, bi); - sctp_init_buffer (vm, b); - sctp_prepare_heartbeat_chunk (sctp_conn, i, b); - - sctp_enqueue_to_output_now (vm, b, bi, - sctp_conn->sub_conn[i]. - connection.is_ip4); - - sctp_conn->sub_conn[i].unacknowledged_hb += 1; - } - } -} - -/** - * Convert buffer to SHUTDOWN_COMPLETE - */ -void -sctp_prepare_shutdown_complete_chunk (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b) -{ - u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t); - alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes); - - u16 chunk_len = alloc_bytes - sizeof (sctp_header_t); - - sctp_shutdown_complete_chunk_t *shutdown_complete = - vlib_buffer_push_uninit (b, alloc_bytes); - - shutdown_complete->sctp_hdr.checksum = 0; - /* No need of host_to_net conversion, already in net-byte order */ - shutdown_complete->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - shutdown_complete->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - shutdown_complete->sctp_hdr.verification_tag = sctp_conn->remote_tag; - - vnet_sctp_set_chunk_type (&shutdown_complete->chunk_hdr, SHUTDOWN_COMPLETE); - vnet_sctp_set_chunk_length (&shutdown_complete->chunk_hdr, chunk_len); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -void -sctp_send_shutdown_complete (sctp_connection_t * sctp_conn, u8 idx, - vlib_buffer_t * b0) -{ - vlib_main_t *vm = vlib_get_main (); - - if (sctp_check_outstanding_data_chunks (sctp_conn) > 0) - return; - - sctp_reuse_buffer (vm, b0); - - sctp_prepare_shutdown_complete_chunk (sctp_conn, idx, b0); -} - -/* - * Send INIT - */ -void -sctp_send_init (sctp_connection_t * sctp_conn) -{ - vlib_buffer_t *b; - u32 bi; - sctp_main_t *tm = vnet_get_sctp_main (); - vlib_main_t *vm = vlib_get_main (); - - if (PREDICT_FALSE (sctp_conn->init_retransmit_err > SCTP_MAX_INIT_RETRANS)) - { - clib_warning ("Reached MAX_INIT_RETRANS times. Aborting connection."); - - session_stream_connect_notify (&sctp_conn->sub_conn - [SCTP_PRIMARY_PATH_IDX].connection, 1); - - sctp_connection_timers_reset (sctp_conn); - - sctp_connection_cleanup (sctp_conn); - - return; - } - - if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi))) - return; - - b = vlib_get_buffer (vm, bi); - u8 idx = SCTP_PRIMARY_PATH_IDX; - - sctp_init_buffer (vm, b); - sctp_prepare_init_chunk (sctp_conn, idx, b); - - sctp_push_ip_hdr (tm, &sctp_conn->sub_conn[idx], b); - sctp_enqueue_to_ip_lookup (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4, - sctp_conn->sub_conn[idx].c_fib_index); - - /* Start the T1_INIT timer */ - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT, - sctp_conn->sub_conn[idx].RTO); - - /* Change state to COOKIE_WAIT */ - sctp_conn->state = SCTP_STATE_COOKIE_WAIT; - - /* Measure RTT with this */ - sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now (); -} - -/** - * Push SCTP header and update connection variables - */ -static void -sctp_push_hdr_i (sctp_connection_t * sctp_conn, vlib_buffer_t * b, - sctp_state_t next_state) -{ - u16 data_len = b->current_length; - - if (b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID) - data_len += b->total_length_not_including_first_buffer; - - ASSERT (!b->total_length_not_including_first_buffer - || (b->flags & VLIB_BUFFER_NEXT_PRESENT) - || !(b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)); - - SCTP_ADV_DBG_OUTPUT ("b->current_length = %u, " - "b->current_data = %p " - "data_len = %u", - b->current_length, b->current_data, data_len); - - u16 data_padding = vnet_sctp_calculate_padding (b->current_length); - if (data_padding > 0) - { - u8 *p_tail = vlib_buffer_put_uninit (b, data_padding); - clib_memset_u8 (p_tail, 0, data_padding); - } - - u16 bytes_to_add = sizeof (sctp_payload_data_chunk_t); - u16 chunk_length = data_len + bytes_to_add - sizeof (sctp_header_t); - - sctp_payload_data_chunk_t *data_chunk = - vlib_buffer_push_uninit (b, bytes_to_add); - - u8 idx = sctp_data_subconn_select (sctp_conn); - SCTP_DBG_OUTPUT - ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u", - sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index, - sctp_conn->sub_conn[idx].connection.c_index, - sctp_conn->sub_conn[idx].connection.lcl_port, - sctp_conn->sub_conn[idx].connection.rmt_port); - data_chunk->sctp_hdr.checksum = 0; - data_chunk->sctp_hdr.src_port = - sctp_conn->sub_conn[idx].connection.lcl_port; - data_chunk->sctp_hdr.dst_port = - sctp_conn->sub_conn[idx].connection.rmt_port; - data_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag; - - data_chunk->tsn = clib_host_to_net_u32 (sctp_conn->next_tsn); - data_chunk->stream_id = clib_host_to_net_u16 (0); - data_chunk->stream_seq = clib_host_to_net_u16 (0); - - vnet_sctp_set_chunk_type (&data_chunk->chunk_hdr, DATA); - vnet_sctp_set_chunk_length (&data_chunk->chunk_hdr, chunk_length); - - vnet_sctp_set_bbit (&data_chunk->chunk_hdr); - vnet_sctp_set_ebit (&data_chunk->chunk_hdr); - - SCTP_ADV_DBG_OUTPUT ("POINTER_WITH_DATA = %p, DATA_OFFSET = %u", - b->data, b->current_data); - - if (sctp_conn->sub_conn[idx].state != SCTP_SUBCONN_AWAITING_SACK) - { - sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_AWAITING_SACK; - sctp_conn->last_unacked_tsn = sctp_conn->next_tsn; - } - - sctp_conn->next_tsn += data_len; - - u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn; - /* Section 7.2.2; point (3) */ - if (sctp_conn->sub_conn[idx].partially_acked_bytes >= - sctp_conn->sub_conn[idx].cwnd - && inflight >= sctp_conn->sub_conn[idx].cwnd) - { - sctp_conn->sub_conn[idx].cwnd += sctp_conn->sub_conn[idx].PMTU; - sctp_conn->sub_conn[idx].partially_acked_bytes -= - sctp_conn->sub_conn[idx].cwnd; - } - - sctp_conn->sub_conn[idx].last_data_ts = sctp_time_now (); - - sctp_buffer_opaque (b)->sctp.connection_index = - sctp_conn->sub_conn[idx].connection.c_index; - - sctp_buffer_opaque (b)->sctp.subconn_idx = idx; -} - -u32 -sctp_push_header (transport_connection_t * trans_conn, vlib_buffer_t * b) -{ - sctp_connection_t *sctp_conn = - sctp_get_connection_from_transport (trans_conn); - - SCTP_DBG_OUTPUT ("TRANS_CONN = %p, SCTP_CONN = %p, " - "S_INDEX = %u, C_INDEX = %u," - "trans_conn->LCL_PORT = %u, trans_conn->RMT_PORT = %u", - trans_conn, - sctp_conn, - trans_conn->s_index, - trans_conn->c_index, - trans_conn->lcl_port, trans_conn->rmt_port); - - sctp_push_hdr_i (sctp_conn, b, SCTP_STATE_ESTABLISHED); - - sctp_trajectory_add_start (b, 3); - - return 0; -} - -u32 -sctp_prepare_data_retransmit (sctp_connection_t * sctp_conn, - u8 idx, - u32 offset, - u32 max_deq_bytes, vlib_buffer_t ** b) -{ - sctp_main_t *tm = vnet_get_sctp_main (); - vlib_main_t *vm = vlib_get_main (); - int n_bytes = 0; - u32 bi, available_bytes, seg_size; - u8 *data; - - ASSERT (sctp_conn->state >= SCTP_STATE_ESTABLISHED); - ASSERT (max_deq_bytes != 0); - - /* - * Make sure we can retransmit something - */ - available_bytes = - transport_max_tx_dequeue (&sctp_conn->sub_conn[idx].connection); - ASSERT (available_bytes >= offset); - available_bytes -= offset; - if (!available_bytes) - return 0; - max_deq_bytes = clib_min (sctp_conn->sub_conn[idx].cwnd, max_deq_bytes); - max_deq_bytes = clib_min (available_bytes, max_deq_bytes); - - seg_size = max_deq_bytes; - - /* - * Allocate and fill in buffer(s) - */ - - if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi))) - return 0; - *b = vlib_get_buffer (vm, bi); - data = sctp_init_buffer (vm, *b); - - /* Easy case, buffer size greater than mss */ - if (PREDICT_TRUE (seg_size <= tm->bytes_per_buffer)) - { - n_bytes = - session_tx_fifo_peek_bytes (&sctp_conn->sub_conn[idx].connection, - data, offset, max_deq_bytes); - ASSERT (n_bytes == max_deq_bytes); - b[0]->current_length = n_bytes; - sctp_push_hdr_i (sctp_conn, *b, sctp_conn->state); - } - - return n_bytes; -} - -void -sctp_data_retransmit (sctp_connection_t * sctp_conn) -{ - vlib_main_t *vm = vlib_get_main (); - vlib_buffer_t *b = 0; - u32 bi, n_bytes = 0; - - u8 idx = sctp_data_subconn_select (sctp_conn); - - SCTP_DBG_OUTPUT - ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u", - sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index, - sctp_conn->sub_conn[idx].connection.c_index, - sctp_conn->sub_conn[idx].connection.lcl_port, - sctp_conn->sub_conn[idx].connection.rmt_port); - - if (sctp_conn->state >= SCTP_STATE_ESTABLISHED) - { - return; - } - - n_bytes = - sctp_prepare_data_retransmit (sctp_conn, idx, 0, - sctp_conn->sub_conn[idx].cwnd, &b); - if (n_bytes > 0) - SCTP_DBG_OUTPUT ("We have data (%u bytes) to retransmit", n_bytes); - - bi = vlib_get_buffer_index (vm, b); - - sctp_enqueue_to_output_now (vm, b, bi, - sctp_conn->sub_conn[idx].connection.is_ip4); - - return; -} - -#if SCTP_DEBUG_STATE_MACHINE -always_inline u8 -sctp_validate_output_state_machine (sctp_connection_t * sctp_conn, - u8 chunk_type) -{ - u8 result = 0; - switch (sctp_conn->state) - { - case SCTP_STATE_CLOSED: - if (chunk_type != INIT && chunk_type != INIT_ACK) - result = 1; - break; - case SCTP_STATE_ESTABLISHED: - if (chunk_type != DATA && chunk_type != HEARTBEAT && - chunk_type != HEARTBEAT_ACK && chunk_type != SACK && - chunk_type != COOKIE_ACK && chunk_type != SHUTDOWN) - result = 1; - break; - case SCTP_STATE_COOKIE_WAIT: - if (chunk_type != COOKIE_ECHO) - result = 1; - break; - case SCTP_STATE_SHUTDOWN_SENT: - if (chunk_type != SHUTDOWN_COMPLETE) - result = 1; - break; - case SCTP_STATE_SHUTDOWN_RECEIVED: - if (chunk_type != SHUTDOWN_ACK) - result = 1; - break; - } - return result; -} -#endif - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_output_node.c b/src/plugins/sctp/sctp_output_node.c deleted file mode 100644 index 7bf2e896acc..00000000000 --- a/src/plugins/sctp/sctp_output_node.c +++ /dev/null @@ -1,397 +0,0 @@ -/* - * Copyright (c) 2018 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include <sctp/sctp.h> -#include <sctp/sctp_debug.h> -#include <vppinfra/random.h> -#include <openssl/hmac.h> - -u32 -ip6_sctp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, - ip6_header_t * ip0, int *bogus_lengthp); - -u32 -ip4_sctp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, - ip4_header_t * ip0); - -#define foreach_sctp4_output_next \ - _ (DROP, "error-drop") \ - _ (IP_LOOKUP, "ip4-lookup") - -#define foreach_sctp6_output_next \ - _ (DROP, "error-drop") \ - _ (IP_LOOKUP, "ip6-lookup") - -static char *sctp_error_strings[] = { -#define sctp_error(n,s) s, -#include <sctp/sctp_error.def> -#undef sctp_error -}; - -typedef enum _sctp_output_next -{ - SCTP_OUTPUT_NEXT_DROP, - SCTP_OUTPUT_NEXT_IP_LOOKUP, - SCTP_OUTPUT_N_NEXT -} sctp_output_next_t; - -typedef struct -{ - sctp_header_t sctp_header; - sctp_connection_t sctp_connection; -} sctp_tx_trace_t; - -always_inline u8 -sctp_is_retransmitting (sctp_connection_t * sctp_conn, u8 idx) -{ - return sctp_conn->sub_conn[idx].is_retransmitting; -} - -always_inline uword -sctp46_output_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip4) -{ - u32 n_left_from, next_index, *from, *to_next; - u32 my_thread_index = vm->thread_index; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - next_index = node->cached_next_index; - sctp_set_time_now (my_thread_index); - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - sctp_header_t *sctp_hdr = 0; - sctp_connection_t *sctp_conn; - sctp_tx_trace_t *t0; - sctp_header_t *th0 = 0; - u32 error0 = SCTP_ERROR_PKTS_SENT, next0 = - SCTP_OUTPUT_NEXT_IP_LOOKUP; - -#if SCTP_DEBUG_STATE_MACHINE - u16 packet_length = 0; -#endif - - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - - sctp_conn = - sctp_connection_get (sctp_buffer_opaque (b0)-> - sctp.connection_index, my_thread_index); - - if (PREDICT_FALSE (sctp_conn == 0)) - { - error0 = SCTP_ERROR_INVALID_CONNECTION; - next0 = SCTP_OUTPUT_NEXT_DROP; - goto done; - } - - u8 idx = sctp_buffer_opaque (b0)->sctp.subconn_idx; - - th0 = vlib_buffer_get_current (b0); - - if (is_ip4) - { - ip4_header_t *iph4 = vlib_buffer_push_ip4 (vm, - b0, - &sctp_conn->sub_conn - [idx].connection. - lcl_ip.ip4, - &sctp_conn-> - sub_conn - [idx].connection. - rmt_ip.ip4, - IP_PROTOCOL_SCTP, 1); - - u32 checksum = ip4_sctp_compute_checksum (vm, b0, iph4); - - sctp_hdr = ip4_next_header (iph4); - sctp_hdr->checksum = checksum; - - vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data; - -#if SCTP_DEBUG_STATE_MACHINE - packet_length = clib_net_to_host_u16 (iph4->length); -#endif - } - else - { - ip6_header_t *iph6 = vlib_buffer_push_ip6 (vm, - b0, - &sctp_conn->sub_conn - [idx]. - connection.lcl_ip. - ip6, - &sctp_conn->sub_conn - [idx]. - connection.rmt_ip. - ip6, - IP_PROTOCOL_SCTP); - - int bogus = ~0; - u32 checksum = ip6_sctp_compute_checksum (vm, b0, iph6, &bogus); - ASSERT (!bogus); - - sctp_hdr = ip6_next_header (iph6); - sctp_hdr->checksum = checksum; - - vnet_buffer (b0)->l3_hdr_offset = (u8 *) iph6 - b0->data; - vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data; - -#if SCTP_DEBUG_STATE_MACHINE - packet_length = clib_net_to_host_u16 (iph6->payload_length); -#endif - } - - sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr; - u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr); - if (chunk_type >= UNKNOWN) - { - clib_warning - ("Trying to send an unrecognized chunk... something is really bad."); - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = SCTP_OUTPUT_NEXT_DROP; - goto done; - } - -#if SCTP_DEBUG_STATE_MACHINE - u8 is_valid = - (sctp_conn->sub_conn[idx].connection.lcl_port == - sctp_hdr->src_port - || sctp_conn->sub_conn[idx].connection.lcl_port == - sctp_hdr->dst_port) - && (sctp_conn->sub_conn[idx].connection.rmt_port == - sctp_hdr->dst_port - || sctp_conn->sub_conn[idx].connection.rmt_port == - sctp_hdr->src_port); - - if (!is_valid) - { - SCTP_DBG_STATE_MACHINE ("BUFFER IS INCORRECT: conn_index = %u, " - "packet_length = %u, " - "chunk_type = %u [%s], " - "connection.lcl_port = %u, sctp_hdr->src_port = %u, " - "connection.rmt_port = %u, sctp_hdr->dst_port = %u", - sctp_conn->sub_conn[idx]. - connection.c_index, packet_length, - chunk_type, - sctp_chunk_to_string (chunk_type), - sctp_conn->sub_conn[idx]. - connection.lcl_port, sctp_hdr->src_port, - sctp_conn->sub_conn[idx]. - connection.rmt_port, - sctp_hdr->dst_port); - - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = SCTP_OUTPUT_NEXT_DROP; - goto done; - } -#endif - SCTP_DBG_STATE_MACHINE - ("SESSION_INDEX = %u, CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), " - "CHUNK_TYPE = %s, " "SRC_PORT = %u, DST_PORT = %u", - sctp_conn->sub_conn[idx].connection.s_index, - sctp_conn->sub_conn[idx].connection.c_index, - sctp_conn->state, sctp_state_to_string (sctp_conn->state), - sctp_chunk_to_string (chunk_type), full_hdr->hdr.src_port, - full_hdr->hdr.dst_port); - - /* Let's make sure the state-machine does not send anything crazy */ -#if SCTP_DEBUG_STATE_MACHINE - if (sctp_validate_output_state_machine (sctp_conn, chunk_type) != 0) - { - SCTP_DBG_STATE_MACHINE - ("Sending the wrong chunk (%s) based on state-machine status (%s)", - sctp_chunk_to_string (chunk_type), - sctp_state_to_string (sctp_conn->state)); - - error0 = SCTP_ERROR_UNKNOWN_CHUNK; - next0 = SCTP_OUTPUT_NEXT_DROP; - goto done; - - } -#endif - - /* Karn's algorithm: RTT measurements MUST NOT be made using - * packets that were retransmitted - */ - if (!sctp_is_retransmitting (sctp_conn, idx)) - { - /* Measure RTT with this */ - if (chunk_type == DATA - && sctp_conn->sub_conn[idx].RTO_pending == 0) - { - sctp_conn->sub_conn[idx].RTO_pending = 1; - sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now (); - } - else - sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now (); - } - - /* Let's take care of TIMERS */ - switch (chunk_type) - { - case COOKIE_ECHO: - { - sctp_conn->state = SCTP_STATE_COOKIE_ECHOED; - break; - } - case DATA: - { - SCTP_ADV_DBG_OUTPUT ("PACKET_LENGTH = %u", packet_length); - - sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX, - sctp_conn->sub_conn[idx].RTO); - break; - } - case SHUTDOWN: - { - /* Start the SCTP_TIMER_T2_SHUTDOWN timer */ - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN, - sctp_conn->sub_conn[idx].RTO); - sctp_conn->state = SCTP_STATE_SHUTDOWN_SENT; - break; - } - case SHUTDOWN_ACK: - { - /* Start the SCTP_TIMER_T2_SHUTDOWN timer */ - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN, - sctp_conn->sub_conn[idx].RTO); - sctp_conn->state = SCTP_STATE_SHUTDOWN_ACK_SENT; - break; - } - case SHUTDOWN_COMPLETE: - { - sctp_conn->state = SCTP_STATE_CLOSED; - break; - } - } - - vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = - sctp_conn->sub_conn[idx].c_fib_index; - - b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - - SCTP_DBG_STATE_MACHINE - ("SESSION_INDEX = %u, CONNECTION_INDEX = %u, " "NEW_STATE = %s, " - "CHUNK_SENT = %s", sctp_conn->sub_conn[idx].connection.s_index, - sctp_conn->sub_conn[idx].connection.c_index, - sctp_state_to_string (sctp_conn->state), - sctp_chunk_to_string (chunk_type)); - - vnet_sctp_common_hdr_params_host_to_net (&full_hdr->common_hdr); - - done: - b0->error = node->errors[error0]; - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); - if (th0) - { - clib_memcpy_fast (&t0->sctp_header, th0, - sizeof (t0->sctp_header)); - } - else - { - clib_memset (&t0->sctp_header, 0, sizeof (t0->sctp_header)); - } - clib_memcpy_fast (&t0->sctp_connection, sctp_conn, - sizeof (t0->sctp_connection)); - } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - return from_frame->n_vectors; -} - -VLIB_NODE_FN (sctp4_output_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_output_inline (vm, node, from_frame, 1 /* is_ip4 */ ); -} - -VLIB_NODE_FN (sctp6_output_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return sctp46_output_inline (vm, node, from_frame, 0 /* is_ip4 */ ); -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp4_output_node) = -{ - .name = "sctp4-output", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_OUTPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [SCTP_OUTPUT_NEXT_##s] = n, - foreach_sctp4_output_next -#undef _ - }, - .format_buffer = format_sctp_header, - .format_trace = format_sctp_tx_trace, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (sctp6_output_node) = -{ - .name = "sctp6-output", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - .n_errors = SCTP_N_ERROR, - .error_strings = sctp_error_strings, - .n_next_nodes = SCTP_OUTPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [SCTP_OUTPUT_NEXT_##s] = n, - foreach_sctp6_output_next -#undef _ - }, - .format_buffer = format_sctp_header, - .format_trace = format_sctp_tx_trace, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_packet.h b/src/plugins/sctp/sctp_packet.h deleted file mode 100644 index 04995aa7ee3..00000000000 --- a/src/plugins/sctp/sctp_packet.h +++ /dev/null @@ -1,1470 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef included_vnet_sctp_packet_h -#define included_vnet_sctp_packet_h - -#include <stdbool.h> - -#include <vnet/ip/ip4_packet.h> -#include <vnet/ip/ip6_packet.h> - -/* - * As per RFC 4960 - * https://tools.ietf.org/html/rfc4960 - */ - -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Source Port Number | Destination Port Number | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Verification Tag | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Checksum | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - /* - * This is the SCTP sender's port number. It can be used by the - * receiver in combination with the source IP address, the SCTP - * destination port, and possibly the destination IP address to - * identify the association to which this packet belongs. - * The port number 0 MUST NOT be used. - */ - u16 src_port; - - /* - * This is the SCTP port number to which this packet is destined. - * The receiving host will use this port number to de-multiplex the - * SCTP packet to the correct receiving endpoint/application. - * The port number 0 MUST NOT be used. - */ - u16 dst_port; - - /* - * The receiver of this packet uses the Verification Tag to validate - * the sender of this SCTP packet. On transmit, the value of this - * Verification Tag MUST be set to the value of the Initiate Tag - * received from the peer endpoint during the association - * initialization, with the following exceptions: - * - A packet containing an INIT chunk MUST have a zero Verification - * Tag. - * - A packet containing a SHUTDOWN COMPLETE chunk with the T bit - * set MUST have the Verification Tag copied from the packet with - * the SHUTDOWN ACK chunk. - * - A packet containing an ABORT chunk may have the verification tag - * copied from the packet that caused the ABORT to be sent. - * An INIT chunk MUST be the only chunk in the SCTP packet carrying it. - */ - u32 verification_tag; - - /* - * This field contains the checksum of this SCTP packet. - * SCTP uses the CRC32c algorithm. - */ - u32 checksum; - -} sctp_header_t; - -always_inline void -vnet_set_sctp_src_port (sctp_header_t * h, u16 src_port) -{ - h->src_port = clib_host_to_net_u16 (src_port); -} - -always_inline u16 -vnet_get_sctp_src_port (sctp_header_t * h) -{ - return (clib_net_to_host_u16 (h->src_port)); -} - -always_inline void -vnet_set_sctp_dst_port (sctp_header_t * h, u16 dst_port) -{ - h->dst_port = clib_host_to_net_u16 (dst_port); -} - -always_inline u16 -vnet_get_sctp_dst_port (sctp_header_t * h) -{ - return (clib_net_to_host_u16 (h->dst_port)); -} - -always_inline void -vnet_set_sctp_verification_tag (sctp_header_t * h, u32 verification_tag) -{ - h->verification_tag = clib_host_to_net_u32 (verification_tag); -} - -always_inline u32 -vnet_get_sctp_verification_tag (sctp_header_t * h) -{ - return (clib_net_to_host_u32 (h->verification_tag)); -} - -always_inline void -vnet_set_sctp_checksum (sctp_header_t * h, u32 checksum) -{ - h->checksum = clib_host_to_net_u32 (checksum); -} - -always_inline u32 -vnet_get_sctp_checksum (sctp_header_t * h) -{ - return (clib_net_to_host_u32 (h->checksum)); -} - -/* - * Multiple chunks can be bundled into one SCTP packet up to the MTU - * size, except for the INIT, INIT ACK, and SHUTDOWN COMPLETE chunks. - * These chunks MUST NOT be bundled with any other chunk in a packet. - * - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Common Header | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Chunk #1 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | ... | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Chunk #n | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ - -typedef enum -{ - DATA = 0, - INIT, - INIT_ACK, - SACK, - HEARTBEAT, - HEARTBEAT_ACK, - ABORT, - SHUTDOWN, - SHUTDOWN_ACK, - OPERATION_ERROR, - COOKIE_ECHO, - COOKIE_ACK, - ECNE, - CWR, - SHUTDOWN_COMPLETE, - UNKNOWN -} sctp_chunk_type; - -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Chunk Type | Chunk Flags | Chunk Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - /* - * This field identifies the type of information contained in the - * Chunk Value field. It takes a value from 0 to 254. - * The value of 255 is reserved for future use as an extension field. - * - * The values of Chunk Types are defined as follows: - * ID Value Chunk Type - * ----- ---------- - * 0 - Payload Data (DATA) - * 1 - Initiation (INIT) - * 2 - Initiation Acknowledgement (INIT ACK) - * 3 - Selective Acknowledgement (SACK) - * 4 - Heartbeat Request (HEARTBEAT) - * 5 - Heartbeat Acknowledgement (HEARTBEAT ACK) - * 6 - Abort (ABORT) - * 7 - Shutdown (SHUTDOWN) - * 8 - Shutdown Acknowledgement (SHUTDOWN ACK) - * 9 - Operation Error (ERROR) - * 10 - State Cookie (COOKIE ECHO) - * 11 - Cookie Acknowledgement (COOKIE ACK) - * 12 - Reserved for Explicit Congestion Notification Echo (ECNE) - * 13 - Reserved for Congestion Window Reduced (CWR) - * 14 - Shutdown Complete (SHUTDOWN COMPLETE) - * 15 to 62 - available - * 63 - reserved for IETF-defined Chunk Extensions - * 64 to 126 - available - * 127 - reserved for IETF-defined Chunk Extensions - * 128 to 190 - available - * 191 - reserved for IETF-defined Chunk Extensions - * 192 to 254 - available - * 255 - reserved for IETF-defined Chunk Extensions - * - * Chunk Types are encoded such that the highest-order 2 bits specify - * the action that must be taken if the processing endpoint does not - * recognize the Chunk Type. - * 00 - Stop processing this SCTP packet and discard it, do not - * process any further chunks within it. - * 01 - Stop processing this SCTP packet and discard it, do not - * process any further chunks within it, and report the - * unrecognized chunk in an 'Unrecognized Chunk Type'. - * 10 - Skip this chunk and continue processing. - * 11 - Skip this chunk and continue processing, but report in an - * ERROR chunk using the 'Unrecognized Chunk Type' cause of error. - * - * Note: The ECNE and CWR chunk types are reserved for future use of - * Explicit Congestion Notification (ECN); - */ - //u8 type; - - /* - * The usage of these bits depends on the Chunk type as given by the - * Chunk Type field. Unless otherwise specified, they are set to 0 on - * transmit and are ignored on receipt. - */ - //u8 flags; - - /* - * This value represents the size of the chunk in bytes, including - * the Chunk Type, Chunk Flags, Chunk Length, and Chunk Value fields. - * Therefore, if the Chunk Value field is zero-length, the Length - * field will be set to 4. - * The Chunk Length field does not count any chunk padding. - * Chunks (including Type, Length, and Value fields) are padded out - * by the sender with all zero bytes to be a multiple of 4 bytes - * long. This padding MUST NOT be more than 3 bytes in total. The - * Chunk Length value does not include terminating padding of the - * chunk. However, it does include padding of any variable-length - * parameter except the last parameter in the chunk. The receiver - * MUST ignore the padding. - * - * Note: A robust implementation should accept the chunk whether or - * not the final padding has been included in the Chunk Length. - */ - //u16 length; - - u32 params; - -} sctp_chunks_common_hdr_t; - -typedef struct -{ - sctp_header_t hdr; - sctp_chunks_common_hdr_t common_hdr; - -} sctp_full_hdr_t; - -#define CHUNK_TYPE_MASK 0xFF000000 -#define CHUNK_TYPE_SHIFT 24 - -#define CHUNK_FLAGS_MASK 0x00FF0000 -#define CHUNK_FLAGS_SHIFT 16 - -#define CHUNK_UBIT_MASK 0x00040000 -#define CHUNK_UBIT_SHIFT 18 - -#define CHUNK_BBIT_MASK 0x00020000 -#define CHUNK_BBIT_SHIFT 17 - -#define CHUNK_EBIT_MASK 0x00010000 -#define CHUNK_EBIT_SHIFT 16 - -#define CHUNK_LENGTH_MASK 0x0000FFFF -#define CHUNK_LENGTH_SHIFT 0 - -always_inline void -vnet_sctp_common_hdr_params_host_to_net (sctp_chunks_common_hdr_t * h) -{ - h->params = clib_host_to_net_u32 (h->params); -} - -always_inline void -vnet_sctp_common_hdr_params_net_to_host (sctp_chunks_common_hdr_t * h) -{ - h->params = clib_net_to_host_u32 (h->params); -} - -always_inline void -vnet_sctp_set_ubit (sctp_chunks_common_hdr_t * h) -{ - h->params &= ~(CHUNK_UBIT_MASK); - h->params |= (1 << CHUNK_UBIT_SHIFT) & CHUNK_UBIT_MASK; -} - -always_inline u8 -vnet_sctp_get_ubit (sctp_chunks_common_hdr_t * h) -{ - return ((h->params & CHUNK_UBIT_MASK) >> CHUNK_UBIT_SHIFT); -} - -always_inline void -vnet_sctp_set_bbit (sctp_chunks_common_hdr_t * h) -{ - h->params &= ~(CHUNK_BBIT_MASK); - h->params |= (1 << CHUNK_BBIT_SHIFT) & CHUNK_BBIT_MASK; -} - -always_inline u8 -vnet_sctp_get_bbit (sctp_chunks_common_hdr_t * h) -{ - return ((h->params & CHUNK_BBIT_MASK) >> CHUNK_BBIT_SHIFT); -} - -always_inline void -vnet_sctp_set_ebit (sctp_chunks_common_hdr_t * h) -{ - h->params &= ~(CHUNK_EBIT_MASK); - h->params |= (1 << CHUNK_EBIT_SHIFT) & CHUNK_EBIT_MASK; -} - -always_inline u8 -vnet_sctp_get_ebit (sctp_chunks_common_hdr_t * h) -{ - return ((h->params & CHUNK_EBIT_MASK) >> CHUNK_EBIT_SHIFT); -} - -always_inline void -vnet_sctp_set_chunk_type (sctp_chunks_common_hdr_t * h, sctp_chunk_type t) -{ - h->params &= ~(CHUNK_TYPE_MASK); - h->params |= (t << CHUNK_TYPE_SHIFT) & CHUNK_TYPE_MASK; -} - -always_inline u8 -vnet_sctp_get_chunk_type (sctp_chunks_common_hdr_t * h) -{ - return ((h->params & CHUNK_TYPE_MASK) >> CHUNK_TYPE_SHIFT); -} - -always_inline void -vnet_sctp_set_chunk_length (sctp_chunks_common_hdr_t * h, u16 length) -{ - h->params &= ~(CHUNK_LENGTH_MASK); - h->params |= (length << CHUNK_LENGTH_SHIFT) & CHUNK_LENGTH_MASK; -} - -always_inline u16 -vnet_sctp_get_chunk_length (sctp_chunks_common_hdr_t * h) -{ - return ((h->params & CHUNK_LENGTH_MASK) >> CHUNK_LENGTH_SHIFT); -} - -/* - * Payload chunk - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 0 | Reserved|U|B|E| Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | TSN | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Stream Identifier S | Stream Sequence Number n | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Payload Protocol Identifier | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / User Data (seq n of Stream S) / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - /* - * Type (8 bits): 0 - * Flags (8 bits): - * -- Reserved (5 bits): all 0s - * -- U bit - * -- B bit - * -- E bit - * Length (16 bits): This field indicates the length of the DATA chunk in - * bytes from the beginning of the type field to the end of the User Data - * field excluding any padding. - * A DATA chunk with one byte of user data will have Length set to 17 - * (indicating 17 bytes). A DATA chunk with a User Data field of length L - * will have the Length field set to (16 + L) (indicating 16+L bytes) where - * L MUST be greater than 0. - */ - - /* - * Fragment Description Table: - * - * B E Description - * ============================================================ - * | 1 0 | First piece of a fragmented user message | - * +----------------------------------------------------------+ - * | 0 0 | Middle piece of a fragmented user message | - * +----------------------------------------------------------+ - * | 0 1 | Last piece of a fragmented user message | - * +----------------------------------------------------------+ - * | 1 1 | Unfragmented message | - * ============================================================ - */ - sctp_chunks_common_hdr_t chunk_hdr; - - /* - * This value represents the TSN for this DATA chunk. - * The valid range of TSN is from 0 to 4294967295 (2**32 - 1). - * TSN wraps back to 0 after reaching 4294967295. - */ - u32 tsn; - - /* - * Identifies the stream to which the following user data belongs. - */ - u16 stream_id; - - /* - * This value represents the Stream Sequence Number of the following user data - * within the stream S. Valid range is 0 to 65535. - * When a user message is fragmented by SCTP for transport, the same Stream - * Sequence Number MUST be carried in each of the fragments of the message. - */ - u16 stream_seq; - - /* - * This value represents an application (or upper layer) specified protocol - * identifier. This value is passed to SCTP by its upper layer and sent to its - * peer. This identifier is not used by SCTP but can be used by certain network - * entities, as well as by the peer application, to identify the type of - * information being carried in this DATA chunk. This field must be sent even - * in fragmented DATA chunks (to make sure it is available for agents in the - * middle of the network). Note that this field is NOT touched by an SCTP - * implementation; therefore, its byte order is NOT necessarily big endian. - * The upper layer is responsible for any byte order conversions to this field. - * The value 0 indicates that no application identifier is specified by the - * upper layer for this payload data. - */ - u32 payload_id; - - /* - * This is the payload user data. The implementation MUST pad the end of the - * data to a 4-byte boundary with all-zero bytes. Any padding MUST NOT be - * included in the Length field. A sender MUST never add more than 3 bytes of - * padding. - */ - u32 data[]; - -} sctp_payload_data_chunk_t; - -always_inline void -vnet_sctp_set_tsn (sctp_payload_data_chunk_t * p, u32 tsn) -{ - p->tsn = clib_host_to_net_u32 (tsn); -} - -always_inline u32 -vnet_sctp_get_tsn (sctp_payload_data_chunk_t * p) -{ - return (clib_net_to_host_u32 (p->tsn)); -} - -always_inline void -vnet_sctp_set_stream_id (sctp_payload_data_chunk_t * p, u16 stream_id) -{ - p->stream_id = clib_host_to_net_u16 (stream_id); -} - -always_inline u16 -vnet_sctp_get_stream_id (sctp_payload_data_chunk_t * p) -{ - return (clib_net_to_host_u16 (p->stream_id)); -} - -always_inline void -vnet_sctp_set_stream_seq (sctp_payload_data_chunk_t * p, u16 stream_seq) -{ - p->stream_seq = clib_host_to_net_u16 (stream_seq); -} - -always_inline u16 -vnet_sctp_get_stream_seq (sctp_payload_data_chunk_t * p) -{ - return (clib_net_to_host_u16 (p->stream_seq)); -} - -always_inline void -vnet_sctp_set_payload_id (sctp_payload_data_chunk_t * p, u32 payload_id) -{ - p->payload_id = clib_host_to_net_u32 (payload_id); -} - -always_inline u32 -vnet_sctp_get_payload_id (sctp_payload_data_chunk_t * p) -{ - return (clib_net_to_host_u32 (p->payload_id)); -} - -always_inline u16 -vnet_sctp_calculate_padding (u16 base_length) -{ - if (base_length % 4 == 0) - return 0; - - return (4 - base_length % 4); -} - -#define INBOUND_STREAMS_COUNT 1 -#define OUTBOUND_STREAMS_COUNT 1 - -/* - * INIT chunk - * - * This chunk is used to initiate an SCTP association between two - * endpoints. - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 1 | Chunk Flags | Chunk Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Initiate Tag | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Advertised Receiver Window Credit (a_rwnd) | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Number of Outbound Streams | Number of Inbound Streams | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Initial TSN | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / Optional/Variable-Length Parameters / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * - * The INIT chunk contains the following parameters. Unless otherwise - * noted, each parameter MUST only be included once in the INIT chunk. - * - * Fixed Parameters Status - * ---------------------------------------------- - * Initiate Tag Mandatory - * Advertised Receiver Window Credit Mandatory - * Number of Outbound Streams Mandatory - * Number of Inbound Streams Mandatory - * Initial TSN Mandatory - * - * Variable Parameters Status Type Value - * ------------------------------------------------------------- - * IPv4 Address (Note 1) Optional 5 - * IPv6 Address (Note 1) Optional 6 - * Cookie Preservative Optional 9 - * Reserved for ECN Capable (Note 2) Optional 32768 (0x8000) - * Host Name Address (Note 3) Optional 11 - * Supported Address Types (Note 4) Optional 12 - * - * Note 1: The INIT chunks can contain multiple addresses that can be - * IPv4 and/or IPv6 in any combination. - * - * Note 2: The ECN Capable field is reserved for future use of Explicit - * Congestion Notification. - * - * Note 3: An INIT chunk MUST NOT contain more than one Host Name Address - * parameter. Moreover, the sender of the INIT MUST NOT combine any other - * address types with the Host Name Address in the INIT. The receiver of - * INIT MUST ignore any other address types if the Host Name Address parameter - * is present in the received INIT chunk. - * - * Note 4: This parameter, when present, specifies all the address types the - * sending endpoint can support. The absence of this parameter indicates that - * the sending endpoint can support any address type. - * - * IMPLEMENTATION NOTE: If an INIT chunk is received with known parameters that - * are not optional parameters of the INIT chunk, then the receiver SHOULD - * process the INIT chunk and send back an INIT ACK. The receiver of the INIT - * chunk MAY bundle an ERROR chunk with the COOKIE ACK chunk later. - * However, restrictive implementations MAY send back an ABORT chunk in response - * to the INIT chunk. The Chunk Flags field in INIT is reserved, and all bits - * in it should be set to 0 by the sender and ignored by the receiver. - * The sequence of parameters within an INIT can be processed in any order. - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - - /* - * The receiver of the INIT (the responding end) records the value of - * the Initiate Tag parameter. - * This value MUST be placed into the Verification Tag field of every - * SCTP packet that the receiver of the INIT transmits within this association. - * The Initiate Tag is allowed to have any value except 0. - * - * If the value of the Initiate Tag in a received INIT chunk is found - * to be 0, the receiver MUST treat it as an error and close the - * association by transmitting an ABORT. - * - * The value of the INIT TAG is recommended to be random for security - * reasons. A good method is described in https://tools.ietf.org/html/rfc4086 - */ - u32 initiate_tag; - - /* - * This value represents the dedicated buffer space, in number of bytes, - * the sender of the INIT has reserved in association with this window. - * During the life of the association, this buffer space SHOULD NOT be - * lessened (i.e., dedicated buffers taken away from this association); - * however, an endpoint MAY change the value of a_rwnd it sends in SACK - * chunks. - */ - u32 a_rwnd; - - /* - * Defines the number of outbound streams the sender of this INIT chunk - * wishes to create in this association. - * The value of 0 MUST NOT be used. - * - * Note: A receiver of an INIT with the OS value set to 0 SHOULD abort - * the association. - */ - u16 outbound_streams_count; - - /* - * Defines the maximum number of streams the sender of this INIT - * chunk allows the peer end to create in this association. - * The value 0 MUST NOT be used. - * - * Note: There is no negotiation of the actual number of streams but - * instead the two endpoints will use the min(requested, offered). - * - * Note: A receiver of an INIT with the MIS value of 0 SHOULD abort - * the association. - */ - u16 inboud_streams_count; - - /* - * Defines the initial TSN that the sender will use. - * The valid range is from 0 to 4294967295. - * This field MAY be set to the value of the Initiate Tag field. - */ - u32 initial_tsn; - - /* The following field allows to have multiple optional fields which are: - * - sctp_ipv4_address - * - sctp_ipv6_address - * - sctp_cookie_preservative - * - sctp_hostname_address - * - sctp_supported_address_types - */ - u32 optional_fields[]; - -} sctp_init_chunk_t; - -/* - * INIT ACK chunk - * - * The INIT ACK chunk is used to acknowledge the initiation of an SCTP - * association. The parameter part of INIT ACK is formatted similarly to the - * INIT chunk. - * - * It uses two extra variable parameters: - * - the State Cookie and - * - the Unrecognized Parameter: - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 2 | Chunk Flags | Chunk Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Initiate Tag | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Advertised Receiver Window Credit | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Number of Outbound Streams | Number of Inbound Streams | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Initial TSN | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / Optional/Variable-Length Parameters / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef sctp_init_chunk_t sctp_init_ack_chunk_t; - -typedef struct -{ - u16 type; - u16 length; - -} sctp_opt_params_hdr_t; - -#define SHA1_OUTPUT_LENGTH 20 -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Parameter Type | Parameter Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / Parameter Value / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - unsigned char mac[SHA1_OUTPUT_LENGTH]; /* RFC 2104 */ - u64 creation_time; - u32 cookie_lifespan; - -} sctp_state_cookie_param_t; - -/* - * This chunk is used only during the initialization of an association. - * It is sent by the initiator of an association to its peer to complete - * the initialization process. This chunk MUST precede any DATA chunk - * sent within the association, but MAY be bundled with one or more DATA - * chunks in the same packet. - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 10 |Chunk Flags | Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * / Cookie / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - - sctp_state_cookie_param_t cookie; - -} sctp_cookie_echo_chunk_t; - - -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 11 |Chunk Flags | Length = 4 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - -} sctp_cookie_ack_chunk_t; - -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 14 |Chunk Flags | Length = 4 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - -} sctp_shutdown_complete_chunk_t; - -/* OPTIONAL or VARIABLE-LENGTH parameters for INIT */ -#define SCTP_IPV4_ADDRESS_TYPE 5 -#define SCTP_IPV4_ADDRESS_TYPE_LENGTH 8 -#define SCTP_IPV6_ADDRESS_TYPE 6 -#define SCTP_IPV6_ADDRESS_TYPE_LENGTH 20 -#define SCTP_STATE_COOKIE_TYPE 7 -#define SCTP_UNRECOGNIZED_TYPE 8 -#define SCTP_COOKIE_PRESERVATIVE_TYPE 9 -#define SCTP_COOKIE_PRESERVATIVE_TYPE_LENGTH 8 -#define SCTP_HOSTNAME_ADDRESS_TYPE 11 -#define SCTP_SUPPORTED_ADDRESS_TYPES 12 - -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 5 | Length = 8 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | IPv4 Address | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - /* - * Contains an IPv4 address of the sending endpoint. - * It is binary encoded. - */ - ip4_address_t address; - -} sctp_ipv4_addr_param_t; - -always_inline void -vnet_sctp_set_ipv4_address (sctp_ipv4_addr_param_t * a, ip4_address_t address) -{ - a->param_hdr.type = clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE); - a->param_hdr.length = clib_host_to_net_u16 (8); - a->address.as_u32 = clib_host_to_net_u32 (address.as_u32); -} - -always_inline u32 -vnet_sctp_get_ipv4_address (sctp_ipv4_addr_param_t * a) -{ - return (clib_net_to_host_u32 (a->address.as_u32)); -} - -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 6 | Length = 20 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | IPv6 Address | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - /* - * Contains an IPv6 address of the sending endpoint. - * It is binary encoded. - */ - ip6_address_t address; - -} sctp_ipv6_addr_param_t; - -always_inline void -vnet_sctp_set_ipv6_address (sctp_ipv6_addr_param_t * a, ip6_address_t address) -{ - a->param_hdr.type = clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE); - a->param_hdr.length = clib_host_to_net_u16 (20); - a->address.as_u64[0] = clib_host_to_net_u64 (address.as_u64[0]); - a->address.as_u64[1] = clib_host_to_net_u64 (address.as_u64[1]); -} - -always_inline ip6_address_t -vnet_sctp_get_ipv6_address (sctp_ipv6_addr_param_t * a) -{ - ip6_address_t ip6_address; - - ip6_address.as_u64[0] = clib_net_to_host_u64 (a->address.as_u64[0]); - ip6_address.as_u64[1] = clib_net_to_host_u64 (a->address.as_u64[1]); - - return ip6_address; -} - -/* - * The sender of the INIT shall use this parameter to suggest to the - * receiver of the INIT for a longer life-span of the State Cookie. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 9 | Length = 8 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Suggested Cookie Life-Span Increment (msec.) | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - /* - * This parameter indicates to the receiver how much increment in - * milliseconds the sender wishes the receiver to add to its default - * cookie life-span. - * - * This optional parameter should be added to the INIT chunk by the - * sender when it reattempts establishing an association with a peer - * to which its previous attempt of establishing the association - * failed due to a stale cookie operation error. The receiver MAY - * choose to ignore the suggested cookie life-span increase for its - * own security reasons. - */ - u32 life_span_inc; - -} sctp_cookie_preservative_param_t; - -always_inline void -vnet_sctp_set_cookie_preservative (sctp_cookie_preservative_param_t * c, - u32 life_span_inc) -{ - c->param_hdr.type = clib_host_to_net_u16 (SCTP_COOKIE_PRESERVATIVE_TYPE); - c->param_hdr.length = clib_host_to_net_u16 (8); - c->life_span_inc = clib_host_to_net_u32 (life_span_inc); -} - -always_inline u32 -vnet_sctp_get_cookie_preservative (sctp_cookie_preservative_param_t * c) -{ - return (clib_net_to_host_u32 (c->life_span_inc)); -} - -#define FQDN_MAX_LENGTH 256 - -/* - * The sender of INIT uses this parameter to pass its Host Name (in - * place of its IP addresses) to its peer. - * The peer is responsible for resolving the name. - * Using this parameter might make it more likely for the association to work - * across a NAT box. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 11 | Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * / Host Name / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - - /* - * This field contains a host name in "host name syntax" per RFC 1123 - * Section 2.1 - * - * Note: At least one null terminator is included in the Host Name - * string and must be included in the length. - */ - char hostname[FQDN_MAX_LENGTH]; - -} sctp_hostname_param_t; - -always_inline void -vnet_sctp_set_hostname_address (sctp_hostname_param_t * h, char *hostname) -{ - h->param_hdr.length = FQDN_MAX_LENGTH; - h->param_hdr.type = clib_host_to_net_u16 (SCTP_HOSTNAME_ADDRESS_TYPE); - clib_memset (h->hostname, '0', FQDN_MAX_LENGTH); - memcpy (h->hostname, hostname, FQDN_MAX_LENGTH); -} - -#define MAX_SUPPORTED_ADDRESS_TYPES 3 - -/* - * The sender of INIT uses this parameter to list all the address types - * it can support. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 12 | Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Address Type #1 | Address Type #2 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | ...... | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-++-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - u16 address_type[MAX_SUPPORTED_ADDRESS_TYPES]; - -} sctp_supported_addr_types_param_t; - -always_inline void -vnet_sctp_set_supported_address_types (sctp_supported_addr_types_param_t * s) -{ - s->param_hdr.type = clib_host_to_net_u16 (SCTP_SUPPORTED_ADDRESS_TYPES); - s->param_hdr.length = 4 /* base = type + length */ + - MAX_SUPPORTED_ADDRESS_TYPES * 4; /* each address type is 4 bytes */ - - s->address_type[0] = clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE); - s->address_type[1] = clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE); - s->address_type[2] = clib_host_to_net_u16 (SCTP_HOSTNAME_ADDRESS_TYPE); -} - -/* - * Error cause codes to be used for the sctp_error_cause.cause_code field - */ -#define INVALID_STREAM_IDENTIFIER 1 -#define MISSING_MANDATORY_PARAMETER 2 -#define STALE_COOKIE_ERROR 3 -#define OUT_OF_RESOURCE 4 -#define UNRESOLVABLE_ADDRESS 5 -#define UNRECOGNIZED_CHUNK_TYPE 6 -#define INVALID_MANDATORY_PARAMETER 7 -#define UNRECOGNIZED_PARAMETER 8 -#define NO_USER_DATA 9 -#define COOKIE_RECEIVED_WHILE_SHUTTING_DOWN 10 -#define RESTART_OF_ASSOCIATION_WITH_NEW_ADDR 11 -#define USER_INITIATED_ABORT 12 -#define PROTOCOL_VIOLATION 13 - -always_inline void -vnet_sctp_set_state_cookie (sctp_state_cookie_param_t * s) -{ - s->param_hdr.type = clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE); - - /* TODO: length & value to be populated */ -} - -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - u32 value[]; - -} sctp_unrecognized_param_t; - -always_inline void -vnet_sctp_set_unrecognized_param (sctp_unrecognized_param_t * u) -{ - u->param_hdr.type = clib_host_to_net_u16 (UNRECOGNIZED_PARAMETER); - - /* TODO: length & value to be populated */ -} - -/* - * Selective ACK (SACK) chunk - * - * This chunk is sent to the peer endpoint to acknowledge received DATA - * chunks and to inform the peer endpoint of gaps in the received - * subsequences of DATA chunks as represented by their TSNs. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 3 |Chunk Flags | Chunk Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Cumulative TSN Ack | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Advertised Receiver Window Credit (a_rwnd) | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Number of Gap Ack Blocks = N | Number of Duplicate TSNs = X | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Gap Ack Block #1 Start | Gap Ack Block #1 End | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * / / - * \ ... \ - * / / - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Gap Ack Block #N Start | Gap Ack Block #N End | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Duplicate TSN 1 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * / / - * \ ... \ - * / / - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Duplicate TSN X | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - /* - * This parameter contains the TSN of the last DATA chunk received in - * sequence before a gap. In the case where no DATA chunk has been - * received, this value is set to the peer's Initial TSN minus one. - */ - u32 cumulative_tsn_ack; - - /* - * This field indicates the updated receive buffer space in bytes of - * the sender of this SACK. - */ - u32 a_rwnd; - - /* - * Indicates the number of Gap Ack Blocks included in this SACK. - */ - u16 gap_ack_blocks_count; - - /* - * This field contains the number of duplicate TSNs the endpoint has - * received. Each duplicate TSN is listed following the Gap Ack Block - * list. - */ - u16 duplicate_tsn_count; - - /* - * Indicates the Start offset TSN for this Gap Ack Block. To calculate - * the actual TSN number the Cumulative TSN Ack is added to this offset - * number. This calculated TSN identifies the first TSN in this Gap Ack - * Block that has been received. - */ - u16 *gap_ack_block_start; - - /* - * Indicates the End offset TSN for this Gap Ack Block. To calculate - * the actual TSN number, the Cumulative TSN Ack is added to this offset - * number. This calculated TSN identifies the TSN of the last DATA chunk - * received in this Gap Ack Block. - */ - u16 *gap_ack_block_end; - - /* - * Indicates the number of times a TSN was received in duplicate since - * the last SACK was sent. Every time a receiver gets a duplicate TSN - * (before sending the SACK), it adds it to the list of duplicates. - * The duplicate count is reinitialized to zero after sending each SACK. - */ - u32 duplicate_tsn; - -} sctp_selective_ack_chunk_t; - -always_inline void -vnet_sctp_set_cumulative_tsn_ack (sctp_selective_ack_chunk_t * s, - u32 cumulative_tsn_ack) -{ - vnet_sctp_set_chunk_type (&s->chunk_hdr, SACK); - s->cumulative_tsn_ack = clib_host_to_net_u32 (cumulative_tsn_ack); -} - -always_inline u32 -vnet_sctp_get_cumulative_tsn_ack (sctp_selective_ack_chunk_t * s) -{ - return clib_net_to_host_u32 (s->cumulative_tsn_ack); -} - -always_inline void -vnet_sctp_set_arwnd (sctp_selective_ack_chunk_t * s, u32 a_rwnd) -{ - vnet_sctp_set_chunk_type (&s->chunk_hdr, SACK); - s->a_rwnd = clib_host_to_net_u32 (a_rwnd); -} - -always_inline u32 -vnet_sctp_get_arwnd (sctp_selective_ack_chunk_t * s) -{ - return clib_net_to_host_u32 (s->a_rwnd); -} - -always_inline void -vnet_sctp_set_gap_ack_blocks_count (sctp_selective_ack_chunk_t * s, - u16 gap_ack_blocks_count) -{ - vnet_sctp_set_chunk_type (&s->chunk_hdr, SACK); - s->gap_ack_blocks_count = clib_host_to_net_u16 (gap_ack_blocks_count); - - if (s->gap_ack_block_start == NULL) - s->gap_ack_block_start = - clib_mem_alloc (sizeof (u16) * gap_ack_blocks_count); - if (s->gap_ack_block_end == NULL) - s->gap_ack_block_end = - clib_mem_alloc (sizeof (u16) * gap_ack_blocks_count); -} - -always_inline u16 -vnet_sctp_get_gap_ack_blocks_count (sctp_selective_ack_chunk_t * s) -{ - return clib_net_to_host_u32 (s->gap_ack_blocks_count); -} - -always_inline void -vnet_sctp_set_duplicate_tsn_count (sctp_selective_ack_chunk_t * s, - u16 duplicate_tsn_count) -{ - vnet_sctp_set_chunk_type (&s->chunk_hdr, SACK); - s->duplicate_tsn_count = clib_host_to_net_u16 (duplicate_tsn_count); -} - -always_inline u16 -vnet_sctp_get_duplicate_tsn_count (sctp_selective_ack_chunk_t * s) -{ - return clib_net_to_host_u16 (s->duplicate_tsn_count); -} - -/* - * Heartbeat Info - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Heartbeat Info Type=1 | HB Info Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * / Sender-Specific Heartbeat Info / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_opt_params_hdr_t param_hdr; - - /* - * The Sender-Specific Heartbeat Info field should normally include - * information about the sender's current time when this HEARTBEAT - * chunk is sent and the destination transport address to which this - * HEARTBEAT is sent. - * This information is simply reflected back by the receiver in the - * HEARTBEAT ACK message. - * - * Note also that the HEARTBEAT message is both for reachability - * checking and for path verification. - * When a HEARTBEAT chunk is being used for path verification purposes, - * it MUST hold a 64-bit random nonce. - */ - u64 hb_info; - -} sctp_hb_info_param_t; - -always_inline void -vnet_sctp_set_heartbeat_info (sctp_hb_info_param_t * h, u64 hb_info, - u16 hb_info_length) -{ - h->hb_info = clib_host_to_net_u16 (1); - h->param_hdr.length = clib_host_to_net_u16 (hb_info_length); - h->hb_info = clib_host_to_net_u64 (hb_info); -} - -/* - * Heartbeat Request - * - * An endpoint should send this chunk to its peer endpoint to probe the - * reachability of a particular destination transport address defined in - * the present association. - * The parameter field contains the Heartbeat Information, which is a - * variable-length opaque data structure understood only by the sender. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 4 | Chunk Flags | Heartbeat Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / Heartbeat Information TLV (Variable-Length) / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - sctp_hb_info_param_t hb_info; - -} sctp_hb_req_chunk_t; - -always_inline void -vnet_sctp_set_hb_request_info (sctp_hb_req_chunk_t * h, - sctp_hb_info_param_t * hb_info) -{ - vnet_sctp_set_chunk_type (&h->chunk_hdr, HEARTBEAT); - memcpy (&h->hb_info, hb_info, sizeof (h->hb_info)); -} - -/* - * Heartbeat Acknowledgement - * - * An endpoint should send this chunk to its peer endpoint as a response - * to a HEARTBEAT chunk. - * A HEARTBEAT ACK is always sent to the source IP address of the IP datagram - * containing the HEARTBEAT chunk to which this ack is responding. - */ -/* - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 5 | Chunk Flags | Heartbeat Ack Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / Heartbeat Information TLV (Variable-Length) / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef sctp_hb_req_chunk_t sctp_hb_ack_chunk_t; - -always_inline void -vnet_sctp_set_hb_ack_info (sctp_hb_ack_chunk_t * h, - sctp_hb_info_param_t * hb_info) -{ - vnet_sctp_set_chunk_type (&h->chunk_hdr, HEARTBEAT_ACK); - memcpy (&h->hb_info, hb_info, sizeof (h->hb_info)); -} - -/* - * Error cause - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Cause Code | Cause Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * / Cause-Specific Information / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -*/ -typedef struct -{ - - sctp_opt_params_hdr_t param_hdr; - u64 cause_info; - -} sctp_err_cause_param_t; - - -/* - * An end-point sends this chunk to its peer end-point to notify it of - * certain error conditions. It contains one or more error causes. - * An Operation Error is not considered fatal in and of itself, but may be - * used with an ABORT chunk to report a fatal condition. It has the - * following parameters: - * - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 9 | Chunk Flags | Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / one or more Error Causes / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - sctp_err_cause_param_t err_causes[]; - -} sctp_operation_error_t; - -/* - * Abort Association (ABORT) - * - * The ABORT chunk is sent to the peer of an association to close the - * association. The ABORT chunk may contain Cause Parameters to inform - * the receiver about the reason of the abort. DATA chunks MUST NOT be - * bundled with ABORT. Control chunks (except for INIT, INIT ACK, and - * SHUTDOWN COMPLETE) MAY be bundled with an ABORT, but they MUST be - * placed before the ABORT in the SCTP packet or they will be ignored by - * the receiver. - * - * If an endpoint receives an ABORT with a format error or no TCB is - * found, it MUST silently discard it. Moreover, under any - * circumstances, an endpoint that receives an ABORT MUST NOT respond to - * that ABORT by sending an ABORT of its own. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 6 |Reserved |T| Length | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * \ \ - * / zero or more Error Causes / - * \ \ - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - sctp_err_cause_param_t err_causes[]; - -} sctp_abort_chunk_t; - -always_inline void -vnet_sctp_set_tbit (sctp_abort_chunk_t * a) -{ - vnet_sctp_set_chunk_type (&a->chunk_hdr, ABORT); - // a->chunk_hdr.flags = clib_host_to_net_u16 (1); -} - -always_inline void -vnet_sctp_unset_tbit (sctp_abort_chunk_t * a) -{ - vnet_sctp_set_chunk_type (&a->chunk_hdr, ABORT); - // a->chunk_hdr.flags = clib_host_to_net_u16 (0); -} - -/* - * Shutdown Association (SHUTDOWN) - * - * An endpoint in an association MUST use this chunk to initiate a - * graceful close of the association with its peer. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 7 | Chunk Flags | Length = 8 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Cumulative TSN Ack | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; - /* - * This parameter contains the TSN of the last chunk received in - * sequence before any gaps. - * - * Note: Since the SHUTDOWN message does not contain Gap Ack Blocks, - * it cannot be used to acknowledge TSNs received out of order. In a - * SACK, lack of Gap Ack Blocks that were previously included - * indicates that the data receiver reneged on the associated DATA - * chunks. Since SHUTDOWN does not contain Gap Ack Blocks, the - * receiver of the SHUTDOWN shouldn't interpret the lack of a Gap Ack - * Block as a renege. - */ - u32 cumulative_tsn_ack; - -} sctp_shutdown_association_chunk_t; - -always_inline void -vnet_sctp_set_tsn_last_received_chunk (sctp_shutdown_association_chunk_t * s, - u32 tsn_last_chunk) -{ - vnet_sctp_set_chunk_type (&s->chunk_hdr, SHUTDOWN); - s->cumulative_tsn_ack = clib_host_to_net_u32 (tsn_last_chunk); -} - -/* - * Shutdown Acknowledgement (SHUTDOWN ACK) - * - * This chunk MUST be used to acknowledge the receipt of the SHUTDOWN - * chunk at the completion of the shutdown process. - */ -/* - * 0 1 2 3 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Type = 8 |Chunk Flags | Length = 4 | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - */ -typedef struct -{ - sctp_header_t sctp_hdr; - sctp_chunks_common_hdr_t chunk_hdr; -} sctp_shutdown_ack_chunk_t; - -always_inline void -vnet_sctp_fill_shutdown_ack (sctp_shutdown_ack_chunk_t * s) -{ - vnet_sctp_set_chunk_type (&s->chunk_hdr, SHUTDOWN_ACK); - vnet_sctp_set_chunk_length (&s->chunk_hdr, 4); -} - -#endif /* included_vnet_sctp_packet_h */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_pg.c b/src/plugins/sctp/sctp_pg.c deleted file mode 100644 index d253330143c..00000000000 --- a/src/plugins/sctp/sctp_pg.c +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include <vnet/ip/ip.h> -#include <vnet/pg/pg.h> - -uword -unformat_pg_sctp_header (unformat_input_t * input, va_list * args) -{ - return 1; -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/sctp_timer.h b/src/plugins/sctp/sctp_timer.h deleted file mode 100644 index 259dea92e09..00000000000 --- a/src/plugins/sctp/sctp_timer.h +++ /dev/null @@ -1,29 +0,0 @@ -/* - * Copyright (c) 2017 SUSE LLC. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef included_sctp_timer_h__ -#define included_sctp_timer_h__ - -#include <vppinfra/tw_timer_16t_2w_512sl.h> -#include <vppinfra/tw_timer_16t_1w_2048sl.h> - -#endif /* included_sctp_timer_h__ */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ diff --git a/src/plugins/sctp/test/test_sctp.py b/src/plugins/sctp/test/test_sctp.py deleted file mode 100644 index 25a2aaf544e..00000000000 --- a/src/plugins/sctp/test/test_sctp.py +++ /dev/null @@ -1,92 +0,0 @@ -#!/usr/bin/env python3 - -import unittest - -from framework import VppTestCase, VppTestRunner -from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath - - -class TestSCTP(VppTestCase): - """ SCTP Test Case """ - - @classmethod - def setUpClass(cls): - cls.extra_vpp_plugin_config.append("plugin sctp_plugin.so { enable }") - super(TestSCTP, cls).setUpClass() - - @classmethod - def tearDownClass(cls): - super(TestSCTP, cls).tearDownClass() - - def setUp(self): - super(TestSCTP, self).setUp() - self.vapi.session_enable_disable(is_enabled=1) - self.vapi.cli("sctp enable") - self.create_loopback_interfaces(2) - - table_id = 0 - - for i in self.lo_interfaces: - i.admin_up() - - if table_id != 0: - tbl = VppIpTable(self, table_id) - tbl.add_vpp_config() - - i.set_table_ip4(table_id) - i.config_ip4() - table_id += 1 - - # Configure namespaces - self.vapi.app_namespace_add_del(namespace_id=b"0", - sw_if_index=self.loop0.sw_if_index) - self.vapi.app_namespace_add_del(namespace_id=b"1", - sw_if_index=self.loop1.sw_if_index) - - def tearDown(self): - for i in self.lo_interfaces: - i.unconfig_ip4() - i.set_table_ip4(0) - i.admin_down() - self.vapi.session_enable_disable(is_enabled=0) - super(TestSCTP, self).tearDown() - - def test_sctp_transfer(self): - """ SCTP echo client/server transfer """ - - # Add inter-table routes - ip_t01 = VppIpRoute(self, self.loop1.local_ip4, 32, - [VppRoutePath("0.0.0.0", - 0xffffffff, - nh_table_id=1)]) - ip_t10 = VppIpRoute(self, self.loop0.local_ip4, 32, - [VppRoutePath("0.0.0.0", - 0xffffffff, - nh_table_id=0)], table_id=1) - ip_t01.add_vpp_config() - ip_t10.add_vpp_config() - - # Start builtin server and client - uri = "sctp://" + self.loop0.local_ip4 + "/1234" - error = self.vapi.cli("test echo server appns 0 fifo-size 4 " + - "no-echo uri " + uri) - if error: - self.logger.critical(error) - self.assertNotIn("failed", error) - - error = self.vapi.cli("test echo client mbytes 10 no-return " + - " appns 1" + - " fifo-size 4" + - " no-output test-bytes syn-timeout 3" + - " test-timeout 30" + - " uri " + uri) - if error: - self.logger.critical(error) - self.assertNotIn("failed", error) - - # Delete inter-table routes - ip_t01.remove_vpp_config() - ip_t10.remove_vpp_config() - -if __name__ == '__main__': - unittest.main(testRunner=VppTestRunner) |