vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2020-05-07	misc: deprecate elftool	Damjan Marion	1	-1/+0
2019-02-19	VPP-1504: Remove JVPP	Michal Cmarada	1	-1/+0
2018-01-30	VPP-899: Run VPP under SELinux	Billy McFall	1	-0/+22

/* * 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 <vnet/sctp/sctp.h> #include <vnet/sctp/sctp_packet.h> #include <vnet/sctp/sctp_debug.h> #include <vnet/session/session.h> #include <math.h> static char *sctp_error_strings[] = { #define sctp_error(n,s) s, #include <vnet/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; } vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id; vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq; u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn); vlib_buffer_advance (b, vnet_buffer (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 (vnet_buffer (b)->sctp.data_len); ASSERT (chunk_len); /* Padding was added: see RFC 4096 section 3.3.1 */ if (vnet_buffer (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. */ vnet_buffer (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 = vnet_buffer (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 (vnet_buffer (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 (vnet_buffer (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 (vnet_buffer (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, 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 (vnet_buffer (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); vnet_buffer (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; } vnet_buffer (b0)->sctp.hdr_offset = (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0); /* Session exists */ if (PREDICT_TRUE (0 != sctp_conn)) { /* Save connection index */ vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index; vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0; vnet_buffer (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: */