geneve: fix options len parsing as 32-bits words - vpp

diff options

author	Mohammed Hawari <mohammed@hawari.fr>	2021-03-31 17:26:19 +0200
committer	Damjan Marion <dmarion@me.com>	2021-04-12 16:00:25 +0000
commit	4b1bacffe34e56775d6abb1541dfcca17bd4e8ee (patch)
tree	53ca578abcff71239f53702bd121be34c08370e1 /src/plugins/avf/virtchnl.h
parent	e263685ac82454c39eee6e2a2146dd1e02d61de8 (diff)

geneve: fix options len parsing as 32-bits words

See https://tools.ietf.org/html/rfc8926 3.4. second paragraph Opt Len Change-Id: I191d835651b2fa64eeb4ec4271497cf3342554be Signed-off-by: Mohammed Hawari <mohammed@hawari.fr> Type: fix

Diffstat (limited to 'src/plugins/avf/virtchnl.h')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2016 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. */ /** * @file * @brief TCP host stack utilities */ #include <vnet/tcp/tcp.h> #include <vnet/session/session.h> #include <vnet/fib/fib.h> #include <vnet/dpo/load_balance.h> #include <vnet/dpo/receive_dpo.h> #include <vnet/ip/ip6_neighbor.h> #include <math.h> tcp_main_t tcp_main; typedef struct { fib_protocol_t nh_proto; vnet_link_t link_type; ip46_address_t ip; u32 sw_if_index; u8 is_add; } tcp_add_del_adj_args_t; static void tcp_add_del_adj_cb (tcp_add_del_adj_args_t * args) { u32 ai; if (args->is_add) { adj_nbr_add_or_lock (args->nh_proto, args->link_type, &args->ip, args->sw_if_index); } else { ai = adj_nbr_find (FIB_PROTOCOL_IP6, VNET_LINK_IP6, &args->ip, args->sw_if_index); if (ai != ADJ_INDEX_INVALID) adj_unlock (ai); } } static void tcp_add_del_adjacency (tcp_connection_t * tc, u8 is_add) { tcp_add_del_adj_args_t args = { .nh_proto = FIB_PROTOCOL_IP6, .link_type = VNET_LINK_IP6, .ip = tc->c_rmt_ip, .sw_if_index = tc->sw_if_index, .is_add = is_add }; vlib_rpc_call_main_thread (tcp_add_del_adj_cb, (u8 *) & args, sizeof (args)); } static u32 tcp_connection_bind (u32 session_index, transport_endpoint_t * lcl) { tcp_main_t *tm = &tcp_main; tcp_connection_t *listener; void *iface_ip; pool_get (tm->listener_pool, listener); memset (listener, 0, sizeof (*listener)); listener->c_c_index = listener - tm->listener_pool; listener->c_lcl_port = lcl->port; /* If we are provided a sw_if_index, bind using one of its ips */ if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX) { if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index, lcl->is_ip4))) ip_set (&lcl->ip, iface_ip, lcl->is_ip4); } ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4); listener->c_is_ip4 = lcl->is_ip4; listener->c_proto = TRANSPORT_PROTO_TCP; listener->c_s_index = session_index; listener->c_fib_index = lcl->fib_index; listener->state = TCP_STATE_LISTEN; tcp_connection_timers_init (listener); TCP_EVT_DBG (TCP_EVT_BIND, listener); return listener->c_c_index; } u32 tcp_session_bind (u32 session_index, transport_endpoint_t * tep) { return tcp_connection_bind (session_index, tep); } static void tcp_connection_unbind (u32 listener_index) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; tc = pool_elt_at_index (tm->listener_pool, listener_index); TCP_EVT_DBG (TCP_EVT_UNBIND, tc); /* Poison the entry */ if (CLIB_DEBUG > 0) memset (tc, 0xFA, sizeof (*tc)); pool_put_index (tm->listener_pool, listener_index); } u32 tcp_session_unbind (u32 listener_index) { tcp_connection_unbind (listener_index); return 0; } transport_connection_t * tcp_session_get_listener (u32 listener_index) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; tc = pool_elt_at_index (tm->listener_pool, listener_index); return &tc->connection; } /** * Cleanup half-open connection * */ void tcp_half_open_connection_del (tcp_connection_t * tc) { tcp_main_t *tm = vnet_get_tcp_main (); clib_spinlock_lock_if_init (&tm->half_open_lock); pool_put_index (tm->half_open_connections, tc->c_c_index); if (CLIB_DEBUG) memset (tc, 0xFA, sizeof (*tc)); clib_spinlock_unlock_if_init (&tm->half_open_lock); } /** * 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. */ int tcp_half_open_connection_cleanup (tcp_connection_t * tc) { /* Make sure this is the owning thread */ if (tc->c_thread_index != vlib_get_thread_index ()) return 1; tcp_timer_reset (tc, TCP_TIMER_ESTABLISH); tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT_SYN); tcp_half_open_connection_del (tc); return 0; } tcp_connection_t * tcp_half_open_connection_new (void) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc = 0; ASSERT (vlib_get_thread_index () == 0); pool_get (tm->half_open_connections, tc); memset (tc, 0, sizeof (*tc)); tc->c_c_index = tc - tm->half_open_connections; return tc; } /** * Cleans up connection state. * * No notifications. */ void tcp_connection_cleanup (tcp_connection_t * tc) { tcp_main_t *tm = &tcp_main; /* Cleanup local endpoint if this was an active connect */ transport_endpoint_cleanup (TRANSPORT_PROTO_TCP, &tc->c_lcl_ip, tc->c_lcl_port); /* Check if connection is not yet fully established */ if (tc->state == TCP_STATE_SYN_SENT) { /* Try to remove the half-open connection. If this is not the owning * thread, tc won't be removed. Retransmit or establish timers will * eventually expire and call again cleanup on the right thread. */ tcp_half_open_connection_cleanup (tc); } else { int thread_index = tc->c_thread_index; /* Make sure all timers are cleared */ tcp_connection_timers_reset (tc); if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6)) tcp_add_del_adjacency (tc, 0); /* Poison the entry */ if (CLIB_DEBUG > 0) memset (tc, 0xFA, sizeof (*tc)); pool_put (tm->connections[thread_index], tc); } } /** * Connection removal. * * This should be called only once connection enters CLOSED state. Note * that it notifies the session of the removal event, so if the goal is to * just remove the connection, call tcp_connection_cleanup instead. */ void tcp_connection_del (tcp_connection_t * tc) { TCP_EVT_DBG (TCP_EVT_DELETE, tc); stream_session_delete_notify (&tc->connection); tcp_connection_cleanup (tc); } tcp_connection_t * tcp_connection_new (u8 thread_index) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; pool_get (tm->connections[thread_index], tc); memset (tc, 0, sizeof (*tc)); tc->c_c_index = tc - tm->connections[thread_index]; tc->c_thread_index = thread_index; return tc; } /** Notify session that connection has been reset. * * Switch state to closed and wait for session to call cleanup. */ void tcp_connection_reset (tcp_connection_t * tc) { TCP_EVT_DBG (TCP_EVT_RST_RCVD, tc); switch (tc->state) { case TCP_STATE_SYN_RCVD: /* Cleanup everything. App wasn't notified yet */ stream_session_delete_notify (&tc->connection); tcp_connection_cleanup (tc); break; case TCP_STATE_SYN_SENT: session_stream_connect_notify (&tc->connection, 1 /* fail */ ); tcp_connection_cleanup (tc); break; case TCP_STATE_ESTABLISHED: stream_session_reset_notify (&tc->connection); /* fall through */ case TCP_STATE_CLOSE_WAIT: case TCP_STATE_FIN_WAIT_1: case TCP_STATE_FIN_WAIT_2: case TCP_STATE_CLOSING: tc->state = TCP_STATE_CLOSED; TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); /* Make sure all timers are cleared */ tcp_connection_timers_reset (tc); /* Wait for cleanup from session layer but not forever */ tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); break; case TCP_STATE_CLOSED: return; } } /** * Begin connection closing procedure. * * If at the end the connection is not in CLOSED state, it is not removed. * Instead, we rely on on TCP to advance through state machine to either * 1) LAST_ACK (passive close) whereby when the last ACK is received * tcp_connection_del is called. This notifies session of the delete and * calls cleanup. * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers * and cleanup is called. * * N.B. Half-close connections are not supported */ void tcp_connection_close (tcp_connection_t * tc) { TCP_EVT_DBG (TCP_EVT_CLOSE, tc); /* Send/Program FIN if needed and switch state */ switch (tc->state) { case TCP_STATE_SYN_SENT: tc->state = TCP_STATE_CLOSED; break; case TCP_STATE_SYN_RCVD: tcp_send_fin (tc); tc->state = TCP_STATE_FIN_WAIT_1; break; case TCP_STATE_ESTABLISHED: if (!stream_session_tx_fifo_max_dequeue (&tc->connection)) tcp_send_fin (tc); else tc->flags |= TCP_CONN_FINPNDG; tc->state = TCP_STATE_FIN_WAIT_1; break; case TCP_STATE_CLOSE_WAIT: tcp_send_fin (tc); tcp_connection_timers_reset (tc); tc->state = TCP_STATE_LAST_ACK; tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); break; case TCP_STATE_FIN_WAIT_1: tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); break; default: TCP_DBG ("state: %u", tc->state); } TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); /* If in CLOSED and WAITCLOSE timer is not set, delete connection now */ if (!tcp_timer_is_active (tc, TCP_TIMER_WAITCLOSE) && tc->state == TCP_STATE_CLOSED) tcp_connection_del (tc); } void tcp_session_close (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); tcp_connection_close (tc); } void tcp_session_cleanup (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); tcp_connection_timers_reset (tc); /* Wait for the session tx events to clear */ tc->state = TCP_STATE_CLOSED; TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); } /** * Initialize all connection timers as invalid */ void tcp_connection_timers_init (tcp_connection_t * tc) { int i; /* Set all to invalid */ for (i = 0; i < TCP_N_TIMERS; i++) { tc->timers[i] = TCP_TIMER_HANDLE_INVALID; } tc->rto = TCP_RTO_INIT; } /** * Stop all connection timers */ void tcp_connection_timers_reset (tcp_connection_t * tc) { int i; for (i = 0; i < TCP_N_TIMERS; i++) { tcp_timer_reset (tc, i); } } #if 0 typedef struct ip4_tcp_hdr { ip4_header_t ip; tcp_header_t tcp; } ip4_tcp_hdr_t; typedef struct ip6_tcp_hdr { ip6_header_t ip; tcp_header_t tcp; } ip6_tcp_hdr_t; static void tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo, dpo_id_t * result) { const dpo_id_t *choice; load_balance_t *lb; int hash; lb = load_balance_get (dpo->dpoi_index); if (tc->c_is_ip4) { ip4_tcp_hdr_t hdr; memset (&hdr, 0, sizeof (hdr)); hdr.ip.protocol = IP_PROTOCOL_TCP; hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32; hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32; hdr.tcp.src_port = tc->c_lcl_port; hdr.tcp.dst_port = tc->c_rmt_port; hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config); } else { ip6_tcp_hdr_t hdr; memset (&hdr, 0, sizeof (hdr)); hdr.ip.protocol = IP_PROTOCOL_TCP; clib_memcpy (&hdr.ip.src_address, &tc->c_lcl_ip.ip6, sizeof (ip6_address_t)); clib_memcpy (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6, sizeof (ip6_address_t)); hdr.tcp.src_port = tc->c_lcl_port; hdr.tcp.dst_port = tc->c_rmt_port; hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config); } choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1); dpo_copy (result, choice); } fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc) { fib_prefix_t prefix; u32 fib_index; clib_memcpy (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr)); prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; prefix.fp_len = tc->c_is_ip4 ? 32 : 128; fib_index = fib_table_find (prefix.fp_proto, tc->c_fib_index); return fib_table_lookup (fib_index, &prefix); } static int tcp_connection_stack_on_fib_entry (tcp_connection_t * tc) { dpo_id_t choice = DPO_INVALID; u32 output_node_index; fib_entry_t *fe; fe = fib_entry_get (tc->c_rmt_fei); if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE) return -1; tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice); output_node_index = tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index; dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice); return 0; } /** Stack tcp connection on peer's fib entry. * * This ultimately populates the dpo the connection will use to send packets. */ static void tcp_connection_fib_attach (tcp_connection_t * tc) { tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc); ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID); tcp_connection_stack_on_fib_entry (tc); } #endif /* 0 */ /** * Initialize connection send variables. */ void tcp_init_snd_vars (tcp_connection_t * tc) { 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. */ tcp_set_time_now (vlib_get_thread_index ()); time_now = tcp_time_now (); tc->iss = random_u32 (&time_now); tc->snd_una = tc->iss; tc->snd_nxt = tc->iss + 1; tc->snd_una_max = tc->snd_nxt; } /** Initialize tcp connection variables * * Should be called after having received a msg from the peer, i.e., a SYN or * a SYNACK, such that connection options have already been exchanged. */ void tcp_connection_init_vars (tcp_connection_t * tc) { tcp_connection_timers_init (tc); tcp_init_mss (tc); scoreboard_init (&tc->sack_sb); tcp_cc_init (tc); if (tc->state == TCP_STATE_SYN_RCVD) tcp_init_snd_vars (tc); if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6)) tcp_add_del_adjacency (tc, 1); // tcp_connection_fib_attach (tc); } static int tcp_alloc_custom_local_endpoint (tcp_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_TCP, lcl_addr); if (port < 1) { clib_warning ("Failed to allocate src port"); return -1; } *lcl_port = port; return 0; } int tcp_connection_open (transport_endpoint_t * rmt) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; ip46_address_t lcl_addr; u16 lcl_port; int rv; /* * Allocate local endpoint */ if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses)) || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses))) rv = tcp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port, rmt->is_ip4); else rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_TCP, rmt, &lcl_addr, &lcl_port); if (rv) return -1; /* * Create connection and send SYN */ clib_spinlock_lock_if_init (&tm->half_open_lock); tc = tcp_half_open_connection_new (); ip_copy (&tc->c_rmt_ip, &rmt->ip, rmt->is_ip4); ip_copy (&tc->c_lcl_ip, &lcl_addr, rmt->is_ip4); tc->c_rmt_port = rmt->port; tc->c_lcl_port = clib_host_to_net_u16 (lcl_port); tc->c_is_ip4 = rmt->is_ip4; tc->c_proto = TRANSPORT_PROTO_TCP; tc->c_fib_index = rmt->fib_index; /* The other connection vars will be initialized after SYN ACK */ tcp_connection_timers_init (tc); TCP_EVT_DBG (TCP_EVT_OPEN, tc); tc->state = TCP_STATE_SYN_SENT; tcp_init_snd_vars (tc); tcp_send_syn (tc); clib_spinlock_unlock_if_init (&tm->half_open_lock); return tc->c_c_index; } int tcp_session_open (transport_endpoint_t * tep) { return tcp_connection_open (tep); } const char *tcp_dbg_evt_str[] = { #define _(sym, str) str, foreach_tcp_dbg_evt #undef _ }; const char *tcp_fsm_states[] = { #define _(sym, str) str, foreach_tcp_fsm_state #undef _ }; u8 * format_tcp_state (u8 * s, va_list * args) { u32 state = va_arg (*args, u32); if (state < TCP_N_STATES) s = format (s, "%s", tcp_fsm_states[state]); else s = format (s, "UNKNOWN (%d (0x%x))", state, state); return s; } const char *tcp_connection_flags_str[] = { #define _(sym, str) str, foreach_tcp_connection_flag #undef _ }; u8 * format_tcp_connection_flags (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); int i, last = -1; for (i = 0; i < TCP_CONN_N_FLAG_BITS; i++) if (tc->flags & (1 << i)) last = i; for (i = 0; i < last; i++) { if (tc->flags & (1 << i)) s = format (s, "%s, ", tcp_connection_flags_str[i]); } if (last >= 0) s = format (s, "%s", tcp_connection_flags_str[last]); return s; } const char *tcp_conn_timers[] = { #define _(sym, str) str, foreach_tcp_timer #undef _ }; u8 * format_tcp_timers (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); int i, last = -1; for (i = 0; i < TCP_N_TIMERS; i++) if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID) last = i; s = format (s, "["); for (i = 0; i < last; i++) { if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID) s = format (s, "%s,", tcp_conn_timers[i]); } if (last >= 0) s = format (s, "%s]", tcp_conn_timers[i]); else s = format (s, "]"); return s; } u8 * format_tcp_congestion_status (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); if (tcp_in_recovery (tc)) s = format (s, "recovery"); else if (tcp_in_fastrecovery (tc)) s = format (s, "fastrecovery"); else s = format (s, "none"); return s; } u8 * format_tcp_vars (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); s = format (s, " flags: %U timers: %U\n", format_tcp_connection_flags, tc, format_tcp_timers, tc); s = format (s, " snd_una %u snd_nxt %u snd_una_max %u", tc->snd_una - tc->iss, tc->snd_nxt - tc->iss, tc->snd_una_max - tc->iss); s = format (s, " rcv_nxt %u rcv_las %u\n", tc->rcv_nxt - tc->irs, tc->rcv_las - tc->irs); s = format (s, " snd_wnd %u rcv_wnd %u snd_wl1 %u snd_wl2 %u\n", tc->snd_wnd, tc->rcv_wnd, tc->snd_wl1 - tc->irs, tc->snd_wl2 - tc->iss); s = format (s, " flight size %u out space %u cc space %u rcv_wnd_av %u\n", tcp_flight_size (tc), tcp_available_output_snd_space (tc), tcp_available_cc_snd_space (tc), tcp_rcv_wnd_available (tc)); s = format (s, " cong %U ", format_tcp_congestion_status, tc); s = format (s, "cwnd %u ssthresh %u rtx_bytes %u bytes_acked %u\n", tc->cwnd, tc->ssthresh, tc->snd_rxt_bytes, tc->bytes_acked); s = format (s, " prev_ssthresh %u snd_congestion %u dupack %u", tc->prev_ssthresh, tc->snd_congestion - tc->iss, tc->rcv_dupacks); s = format (s, " limited_transmit %u\n", tc->limited_transmit - tc->iss); s = format (s, " tsecr %u tsecr_last_ack %u\n", tc->rcv_opts.tsecr, tc->tsecr_last_ack); s = format (s, " rto %u rto_boff %u srtt %u rttvar %u rtt_ts %u ", tc->rto, tc->rto_boff, tc->srtt, tc->rttvar, tc->rtt_ts); s = format (s, "rtt_seq %u\n", tc->rtt_seq); s = format (s, " tsval_recent %u tsval_recent_age %u\n", tc->tsval_recent, tcp_time_now () - tc->tsval_recent_age); if (tc->state >= TCP_STATE_ESTABLISHED) s = format (s, " scoreboard: %U\n", format_tcp_scoreboard, &tc->sack_sb, tc); if (vec_len (tc->snd_sacks)) s = format (s, " sacks tx: %U\n", format_tcp_sacks, tc); return s; } u8 * format_tcp_connection_id (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); if (!tc) return s; if (tc->c_is_ip4) { s = format (s, "[#%d][%s] %U:%d->%U:%d", tc->c_thread_index, "T", format_ip4_address, &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port), format_ip4_address, &tc->c_rmt_ip4, clib_net_to_host_u16 (tc->c_rmt_port)); } else { s = format (s, "[#%d][%s] %U:%d->%U:%d", tc->c_thread_index, "T", format_ip6_address, &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port), format_ip6_address, &tc->c_rmt_ip6, clib_net_to_host_u16 (tc->c_rmt_port)); } return s; } u8 * format_tcp_connection (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); u32 verbose = va_arg (*args, u32); if (!tc) return s; s = format (s, "%-50U", format_tcp_connection_id, tc); if (verbose) { s = format (s, "%-15U", format_tcp_state, tc->state); if (verbose > 1) s = format (s, "\n%U", format_tcp_vars, tc); } return s; } u8 * format_tcp_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); tcp_connection_t *tc; tc = tcp_connection_get (tci, thread_index); if (tc) s = format (s, "%U", format_tcp_connection, tc, verbose); else s = format (s, "empty\n"); return s; } u8 * format_tcp_listener_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); tcp_connection_t *tc = tcp_listener_get (tci); return format (s, "%U", format_tcp_connection_id, tc); } u8 * format_tcp_half_open_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); tcp_connection_t *tc = tcp_half_open_connection_get (tci); return format (s, "%U", format_tcp_connection_id, tc); } u8 * format_tcp_sacks (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); sack_block_t *sacks = tc->snd_sacks; sack_block_t *block; int i, len = 0; len = vec_len (sacks); for (i = 0; i < len - 1; i++) { block = &sacks[i]; s = format (s, " start %u end %u\n", block->start - tc->irs, block->end - tc->irs); } if (len) { block = &sacks[len - 1]; s = format (s, " start %u end %u", block->start - tc->irs, block->end - tc->irs); } return s; } u8 * format_tcp_rcv_sacks (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); sack_block_t *sacks = tc->rcv_opts.sacks; sack_block_t *block; int i, len = 0; len = vec_len (sacks); for (i = 0; i < len - 1; i++) { block = &sacks[i]; s = format (s, " start %u end %u\n", block->start - tc->iss, block->end - tc->iss); } if (len) { block = &sacks[len - 1]; s = format (s, " start %u end %u", block->start - tc->iss, block->end - tc->iss); } return s; } u8 * format_tcp_sack_hole (u8 * s, va_list * args) { sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *); tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); if (tc) s = format (s, " [%u, %u]", hole->start - tc->iss, hole->end - tc->iss); else s = format (s, " [%u, %u]", hole->start, hole->end); return s; } u8 * format_tcp_scoreboard (u8 * s, va_list * args) { sack_scoreboard_t *sb = va_arg (*args, sack_scoreboard_t *); tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); sack_scoreboard_hole_t *hole; s = format (s, "sacked_bytes %u last_sacked_bytes %u lost_bytes %u\n", sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes); s = format (s, " last_bytes_delivered %u high_sacked %u snd_una_adv %u\n", sb->last_bytes_delivered, sb->high_sacked, sb->snd_una_adv); s = format (s, " cur_rxt_hole %u high_rxt %u rescue_rxt %u", sb->cur_rxt_hole, sb->high_rxt, sb->rescue_rxt); hole = scoreboard_first_hole (sb); if (hole) s = format (s, "\n head %u tail %u holes:\n", sb->head, sb->tail); while (hole) { s = format (s, "%U", format_tcp_sack_hole, hole, tc); hole = scoreboard_next_hole (sb, hole); } return s; } transport_connection_t * tcp_session_get_transport (u32 conn_index, u32 thread_index) { tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index); return &tc->connection; } transport_connection_t * tcp_half_open_session_get_transport (u32 conn_index) { tcp_connection_t *tc = tcp_half_open_connection_get (conn_index); return &tc->connection; } /** * Compute maximum segment size for session layer. * * Since the result needs to be the actual data length, it first computes * the tcp options to be used in the next burst and subtracts their * length from the connection's snd_mss. */ u16 tcp_session_send_mss (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; /* Ensure snd_mss does accurately reflect the amount of data we can push * in a segment. This also makes sure that options are updated according to * the current state of the connection. */ tcp_update_snd_mss (tc); return tc->snd_mss; } always_inline u32 tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space) { if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss)) { return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0; } /* If not snd_wnd constrained and we can't write at least a segment, * don't try at all */ if (PREDICT_FALSE (snd_space < tc->snd_mss)) return snd_space < tc->cwnd ? 0 : snd_space; /* round down to mss multiple */ return snd_space - (snd_space % tc->snd_mss); } /** * Compute tx window session is allowed to fill. * * Takes into account available send space, snd_mss and the congestion * state of the connection. If possible, the value returned is a multiple * of snd_mss. * * @param tc tcp connection * @return number of bytes session is allowed to write */ u32 tcp_snd_space (tcp_connection_t * tc) { int snd_space, snt_limited; if (PREDICT_TRUE (tcp_in_cong_recovery (tc) == 0)) { snd_space = tcp_available_output_snd_space (tc); /* If we haven't gotten dupacks or if we did and have gotten sacked * bytes then we can still send as per Limited Transmit (RFC3042) */ if (PREDICT_FALSE (tc->rcv_dupacks != 0 && (tcp_opts_sack_permitted (tc) && tc->sack_sb.last_sacked_bytes == 0))) { if (tc->rcv_dupacks == 1 && tc->limited_transmit != tc->snd_nxt) tc->limited_transmit = tc->snd_nxt; ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt)); snt_limited = tc->snd_nxt - tc->limited_transmit; snd_space = clib_max (2 * tc->snd_mss - snt_limited, 0); } return tcp_round_snd_space (tc, snd_space); } if (tcp_in_recovery (tc)) { tc->snd_nxt = tc->snd_una_max; snd_space = tcp_available_snd_wnd (tc) - tc->snd_rxt_bytes - (tc->snd_una_max - tc->snd_congestion); if (snd_space <= 0 || (tc->snd_una_max - tc->snd_una) >= tc->snd_wnd) return 0; return tcp_round_snd_space (tc, snd_space); } /* RFC 5681: When previously unsent data is available and the new value of * cwnd and the receiver's advertised window allow, a TCP SHOULD send 1*SMSS * bytes of previously unsent data. */ if (tcp_in_fastrecovery (tc) && !tcp_fastrecovery_sent_1_smss (tc)) { if (tcp_available_cc_snd_space (tc) < tc->snd_mss) return 0; tcp_fastrecovery_1_smss_on (tc); return tc->snd_mss; } return 0; } u32 tcp_session_send_space (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; return clib_min (tcp_snd_space (tc), tc->snd_wnd - (tc->snd_nxt - tc->snd_una)); } i32 tcp_rcv_wnd_available (tcp_connection_t * tc) { return (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las); } u32 tcp_session_tx_fifo_offset (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; ASSERT (seq_geq (tc->snd_nxt, tc->snd_una)); /* This still works if fast retransmit is on */ return (tc->snd_nxt - tc->snd_una); } void tcp_update_time (f64 now, u8 thread_index) { tcp_set_time_now (thread_index); tw_timer_expire_timers_16t_2w_512sl (&tcp_main.timer_wheels[thread_index], now); tcp_flush_frames_to_output (thread_index); } /* *INDENT-OFF* */ const static transport_proto_vft_t tcp_proto = { .enable = vnet_tcp_enable_disable, .bind = tcp_session_bind, .unbind = tcp_session_unbind, .push_header = tcp_push_header, .get_connection = tcp_session_get_transport, .get_listener = tcp_session_get_listener, .get_half_open = tcp_half_open_session_get_transport, .open = tcp_session_open, .close = tcp_session_close, .cleanup = tcp_session_cleanup, .send_mss = tcp_session_send_mss, .send_space = tcp_session_send_space, .update_time = tcp_update_time, .tx_fifo_offset = tcp_session_tx_fifo_offset, .format_connection = format_tcp_session, .format_listener = format_tcp_listener_session, .format_half_open = format_tcp_half_open_session, .tx_type = TRANSPORT_TX_PEEK, .service_type = TRANSPORT_SERVICE_VC, }; /* *INDENT-ON* */ void tcp_timer_keep_handler (u32 conn_index) { u32 thread_index = vlib_get_thread_index (); tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); tc->timers[TCP_TIMER_KEEP] = TCP_TIMER_HANDLE_INVALID; tcp_connection_close (tc); } void tcp_timer_establish_handler (u32 conn_index) { tcp_connection_t *tc; tc = tcp_half_open_connection_get (conn_index); if (tc) { ASSERT (tc->state == TCP_STATE_SYN_SENT); session_stream_connect_notify (&tc->connection, 1 /* fail */ ); TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2); } else { tc = tcp_connection_get (conn_index, vlib_get_thread_index ()); /* note: the connection may have already disappeared */ if (PREDICT_FALSE (tc == 0)) return; TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2); ASSERT (tc->state == TCP_STATE_SYN_RCVD); /* Start cleanup. App wasn't notified yet so use delete notify as * opposed to delete to cleanup session layer state. */ stream_session_delete_notify (&tc->connection); } tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID; tcp_connection_cleanup (tc); } void tcp_timer_waitclose_handler (u32 conn_index) { u32 thread_index = vlib_get_thread_index (); tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); if (!tc) return; tc->timers[TCP_TIMER_WAITCLOSE] = TCP_TIMER_HANDLE_INVALID; /* Session didn't come back with a close(). Send FIN either way * and switch to LAST_ACK. */ if (tc->state == TCP_STATE_CLOSE_WAIT) { if (tc->flags & TCP_CONN_FINSNT) { clib_warning ("FIN was sent and still in CLOSE WAIT. Weird!"); } tcp_send_fin (tc); tc->state = TCP_STATE_LAST_ACK; /* Make sure we don't wait in LAST ACK forever */ tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); /* Don't delete the connection yet */ return; } tcp_connection_del (tc); } /* *INDENT-OFF* */ static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] = { tcp_timer_retransmit_handler, tcp_timer_delack_handler, tcp_timer_persist_handler, tcp_timer_keep_handler, tcp_timer_waitclose_handler, tcp_timer_retransmit_syn_handler, tcp_timer_establish_handler }; /* *INDENT-ON* */ static void tcp_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; TCP_EVT_DBG (TCP_EVT_TIMER_POP, connection_index, timer_id); /* Handle expiration */ (*timer_expiration_handlers[timer_id]) (connection_index); } } void tcp_initialize_timer_wheels (tcp_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, tcp_expired_timers_dispatch, 100e-3 /* timer period 100ms */ , ~0); tw->last_run_time = vlib_time_now (this_vlib_main); })); /* *INDENT-ON* */ } clib_error_t * tcp_main_enable (vlib_main_t * vm) { tcp_main_t *tm = vnet_get_tcp_main (); vlib_thread_main_t *vtm = vlib_get_thread_main (); clib_error_t *error = 0; u32 num_threads; int thread; tcp_connection_t *tc __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_TCP, tcp4_input_node.index); ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_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); } /* * Use a preallocated half-open connection pool? */ if (tm->preallocated_half_open_connections) pool_init_fixed (tm->half_open_connections, tm->preallocated_half_open_connections); /* 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); tcp_initialize_timer_wheels (tm); /* Initialize clocks per tick for TCP timestamp. Used to compute * monotonically increasing timestamps. */ tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock / TCP_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_free_list_buffer_size (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); vec_validate (tm->time_now, num_threads - 1); return error; } clib_error_t * vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en) { if (is_en) { if (tcp_main.is_enabled) return 0; return tcp_main_enable (vm); } else { tcp_main.is_enabled = 0; } return 0; } void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add) { tcp_main_t *tm = &tcp_main; if (is_ip4) tm->punt_unknown4 = is_add; else tm->punt_unknown6 = is_add; } clib_error_t * tcp_init (vlib_main_t * vm) { tcp_main_t *tm = vnet_get_tcp_main (); ip_main_t *im = &ip_main; ip_protocol_info_t *pi; /* Session layer, and by implication tcp, are disabled by default */ tm->is_enabled = 0; /* Register with IP for header parsing */ pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP); if (pi == 0) return clib_error_return (0, "TCP protocol info AWOL"); pi->format_header = format_tcp_header; pi->unformat_pg_edit = unformat_pg_tcp_header; /* Register as transport with session layer */ transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto, FIB_PROTOCOL_IP4, tcp4_output_node.index); transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto, FIB_PROTOCOL_IP6, tcp6_output_node.index); tcp_api_reference (); return 0; } VLIB_INIT_FUNCTION (tcp_init); static clib_error_t * tcp_config_fn (vlib_main_t * vm, unformat_input_t * input) { tcp_main_t *tm = vnet_get_tcp_main (); while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "preallocated-connections %d", &tm->preallocated_connections)) ; else if (unformat (input, "preallocated-half-open-connections %d", &tm->preallocated_half_open_connections)) ; else if (unformat (input, "buffer-fail-fraction %f", &tm->buffer_fail_fraction)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } return 0; } VLIB_CONFIG_FUNCTION (tcp_config_fn, "tcp"); /** * \brief Configure an ipv4 source address range * @param vm vlib_main_t pointer * @param start first ipv4 address in the source address range * @param end last ipv4 address in the source address range * @param table_id VRF / table ID, 0 for the default FIB * @return 0 if all OK, else an error indication from api_errno.h */ int tcp_configure_v4_source_address_range (vlib_main_t * vm, ip4_address_t * start, ip4_address_t * end, u32 table_id) { tcp_main_t *tm = vnet_get_tcp_main (); vnet_main_t *vnm = vnet_get_main (); u32 start_host_byte_order, end_host_byte_order; fib_prefix_t prefix; vnet_sw_interface_t *si; fib_node_index_t fei; u32 fib_index = 0; u32 sw_if_index; int rv; int vnet_proxy_arp_add_del (ip4_address_t * lo_addr, ip4_address_t * hi_addr, u32 fib_index, int is_del); memset (&prefix, 0, sizeof (prefix)); fib_index = fib_table_find (FIB_PROTOCOL_IP4, table_id); if (fib_index == ~0) return VNET_API_ERROR_NO_SUCH_FIB; start_host_byte_order = clib_net_to_host_u32 (start->as_u32); end_host_byte_order = clib_net_to_host_u32 (end->as_u32); /* sanity check for reversed args or some such */ if ((end_host_byte_order - start_host_byte_order) > (10 << 10)) return VNET_API_ERROR_INVALID_ARGUMENT; /* Lookup the last address, to identify the interface involved */ prefix.fp_len = 32; prefix.fp_proto = FIB_PROTOCOL_IP4; memcpy (&prefix.fp_addr.ip4, end, sizeof (ip4_address_t)); fei = fib_table_lookup (fib_index, &prefix); /* Couldn't find route to destination. Bail out. */ if (fei == FIB_NODE_INDEX_INVALID) return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB; sw_if_index = fib_entry_get_resolving_interface (fei); /* Enable proxy arp on the interface */ si = vnet_get_sw_interface (vnm, sw_if_index); si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP; /* Configure proxy arp across the range */ rv = vnet_proxy_arp_add_del (start, end, fib_index, 0 /* is_del */ ); if (rv) return rv; do { dpo_id_t dpo = DPO_INVALID; vec_add1 (tm->ip4_src_addresses, start[0]); /* Add local adjacencies for the range */ receive_dpo_add_or_lock (DPO_PROTO_IP4, ~0 /* sw_if_index */ , NULL, &dpo); prefix.fp_len = 32; prefix.fp_proto = FIB_PROTOCOL_IP4; prefix.fp_addr.ip4.as_u32 = start->as_u32; fib_table_entry_special_dpo_update (fib_index, &prefix, FIB_SOURCE_API, FIB_ENTRY_FLAG_EXCLUSIVE, &dpo); dpo_reset (&dpo); start_host_byte_order++; start->as_u32 = clib_host_to_net_u32 (start_host_byte_order); } while (start_host_byte_order <= end_host_byte_order); return 0; } /** * \brief Configure an ipv6 source address range * @param vm vlib_main_t pointer * @param start first ipv6 address in the source address range * @param end last ipv6 address in the source address range * @param table_id VRF / table ID, 0 for the default FIB * @return 0 if all OK, else an error indication from api_errno.h */ int tcp_configure_v6_source_address_range (vlib_main_t * vm, ip6_address_t * start, ip6_address_t * end, u32 table_id) { tcp_main_t *tm = vnet_get_tcp_main (); fib_prefix_t prefix; u32 fib_index = 0; fib_node_index_t fei; u32 sw_if_index; memset (&prefix, 0, sizeof (prefix)); fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id); if (fib_index == ~0) return VNET_API_ERROR_NO_SUCH_FIB; while (1) { int i; ip6_address_t tmp; dpo_id_t dpo = DPO_INVALID; /* Remember this address */ vec_add1 (tm->ip6_src_addresses, start[0]); /* Lookup the prefix, to identify the interface involved */ prefix.fp_len = 128; prefix.fp_proto = FIB_PROTOCOL_IP6; memcpy (&prefix.fp_addr.ip6, start, sizeof (ip6_address_t)); fei = fib_table_lookup (fib_index, &prefix); /* Couldn't find route to destination. Bail out. */ if (fei == FIB_NODE_INDEX_INVALID) return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB; sw_if_index = fib_entry_get_resolving_interface (fei); if (sw_if_index == (u32) ~ 0) return VNET_API_ERROR_NO_MATCHING_INTERFACE; /* Add a proxy neighbor discovery entry for this address */ ip6_neighbor_proxy_add_del (sw_if_index, start, 0 /* is_del */ ); /* Add a receive adjacency for this address */ receive_dpo_add_or_lock (DPO_PROTO_IP6, ~0 /* sw_if_index */ , NULL, &dpo); fib_table_entry_special_dpo_update (fib_index, &prefix, FIB_SOURCE_API, FIB_ENTRY_FLAG_EXCLUSIVE, &dpo); dpo_reset (&dpo); /* Done with the entire range? */ if (!memcmp (start, end, sizeof (start[0]))) break; /* Increment the address. DGMS. */ tmp = start[0]; for (i = 15; i >= 0; i--) { tmp.as_u8[i] += 1; if (tmp.as_u8[i] != 0) break; } start[0] = tmp; } return 0; } static clib_error_t * tcp_src_address (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { ip4_address_t v4start, v4end; ip6_address_t v6start, v6end; u32 table_id = 0; int v4set = 0; int v6set = 0; int rv; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%U - %U", unformat_ip4_address, &v4start, unformat_ip4_address, &v4end)) v4set = 1; else if (unformat (input, "%U", unformat_ip4_address, &v4start)) { memcpy (&v4end, &v4start, sizeof (v4start)); v4set = 1; } else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start, unformat_ip6_address, &v6end)) v6set = 1; else if (unformat (input, "%U", unformat_ip6_address, &v6start)) { memcpy (&v6end, &v6start, sizeof (v6start)); v6set = 1; } else if (unformat (input, "fib-table %d", &table_id)) ; else break; } if (!v4set && !v6set) return clib_error_return (0, "at least one v4 or v6 address required"); if (v4set) { rv = tcp_configure_v4_source_address_range (vm, &v4start, &v4end, table_id); switch (rv) { case 0: break; case VNET_API_ERROR_NO_SUCH_FIB: return clib_error_return (0, "Invalid table-id %d", table_id); case VNET_API_ERROR_INVALID_ARGUMENT: return clib_error_return (0, "Invalid address range %U - %U", format_ip4_address, &v4start, format_ip4_address, &v4end); default: return clib_error_return (0, "error %d", rv); break; } } if (v6set) { rv = tcp_configure_v6_source_address_range (vm, &v6start, &v6end, table_id); switch (rv) { case 0: break; case VNET_API_ERROR_NO_SUCH_FIB: return clib_error_return (0, "Invalid table-id %d", table_id); default: return clib_error_return (0, "error %d", rv); break; } } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (tcp_src_address_command, static) = { .path = "tcp src-address", .short_help = "tcp src-address <ip-addr> [- <ip-addr>] add src address range", .function = tcp_src_address, }; /* *INDENT-ON* */ static u8 * tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb) { #if TCP_SCOREBOARD_TRACE scoreboard_trace_elt_t *block; int i = 0; if (!sb->trace) return s; s = format (s, "scoreboard trace:"); vec_foreach (block, sb->trace) { s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end, block->ack, block->snd_una_max, block->group); if ((++i % 3) == 0) s = format (s, "\n"); } return s; #else return 0; #endif } static clib_error_t * tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { transport_connection_t *tconn = 0; tcp_connection_t *tc; u8 *s = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%U", unformat_transport_connection, &tconn, TRANSPORT_PROTO_TCP)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } if (!TCP_SCOREBOARD_TRACE) { vlib_cli_output (vm, "scoreboard tracing not enabled"); return 0; } tc = tcp_get_connection_from_transport (tconn); s = tcp_scoreboard_dump_trace (s, &tc->sack_sb); vlib_cli_output (vm, "%v", s); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) = { .path = "show tcp scoreboard trace", .short_help = "show tcp scoreboard trace <connection>", .function = tcp_show_scoreboard_trace_fn, }; /* *INDENT-ON* */ u8 * tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose) { int i, trace_len; scoreboard_trace_elt_t *trace; u32 next_ack, left, group, has_new_ack = 0; tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc; sack_block_t *block; if (!tc) return s; memset (dummy_tc, 0, sizeof (*dummy_tc)); tcp_connection_timers_init (dummy_tc); scoreboard_init (&dummy_tc->sack_sb); dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK; #if TCP_SCOREBOARD_TRACE trace = tc->sack_sb.trace; trace_len = vec_len (tc->sack_sb.trace); #else trace = 0; trace_len = 0; #endif for (i = 0; i < trace_len; i++) { if (trace[i].ack != 0) { dummy_tc->snd_una = trace[i].ack - 1448; dummy_tc->snd_una_max = trace[i].ack; } } left = 0; while (left < trace_len) { group = trace[left].group; vec_reset_length (dummy_tc->rcv_opts.sacks); has_new_ack = 0; while (trace[left].group == group) { if (trace[left].ack != 0) { if (verbose) s = format (s, "Adding ack %u, snd_una_max %u, segs: ", trace[left].ack, trace[left].snd_una_max); dummy_tc->snd_una_max = trace[left].snd_una_max; next_ack = trace[left].ack; has_new_ack = 1; } else { if (verbose) s = format (s, "[%u, %u], ", trace[left].start, trace[left].end); vec_add2 (dummy_tc->rcv_opts.sacks, block, 1); block->start = trace[left].start; block->end = trace[left].end; } left++; } /* Push segments */ tcp_rcv_sacks (dummy_tc, next_ack); if (has_new_ack) dummy_tc->snd_una = next_ack + dummy_tc->sack_sb.snd_una_adv; if (verbose) s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb); } s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb); return s; } static clib_error_t * tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { transport_connection_t *tconn = 0; tcp_connection_t *tc = 0; u8 *str = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%U", unformat_transport_connection, &tconn, TRANSPORT_PROTO_TCP)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } if (!TCP_SCOREBOARD_TRACE) { vlib_cli_output (vm, "scoreboard tracing not enabled"); return 0; } tc = tcp_get_connection_from_transport (tconn); if (!tc) { vlib_cli_output (vm, "connection not found"); return 0; } str = tcp_scoreboard_replay (str, tc, 1); vlib_cli_output (vm, "%v", str); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) = { .path = "tcp replay scoreboard", .short_help = "tcp replay scoreboard <connection>", .function = tcp_scoreboard_trace_fn, }; /* *INDENT-ON* */ static clib_error_t * show_tcp_punt_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { tcp_main_t *tm = vnet_get_tcp_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 TCP punt: %s", tm->punt_unknown4 ? "enabled" : "disabled"); vlib_cli_output (vm, "IPv6 TCP punt: %s", tm->punt_unknown6 ? "enabled" : "disabled"); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (show_tcp_punt_command, static) = { .path = "show tcp punt", .short_help = "show tcp punt", .function = show_tcp_punt_fn, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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