X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Ftcp%2Ftcp_input.c;h=4695fbb1161b0140487336067fcfd57eb87f256d;hb=26dd6de91b4d36ac04154c7eb6339684db6684a0;hp=e0139a47e0ce78f7c3155d0df29e9258ce40ba6c;hpb=282a3cb7265346e1299c9401b35730b80f4b506b;p=vpp.git diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c old mode 100644 new mode 100755 index e0139a47e0c..4695fbb1161 --- a/src/vnet/tcp/tcp_input.c +++ b/src/vnet/tcp/tcp_input.c @@ -317,7 +317,7 @@ tcp_segment_validate (tcp_worker_ctx_t * wrk, tcp_connection_t * tc0, * SEG.TSval */ else if (!tcp_rst (th0)) { - tcp_program_ack (wrk, tc0); + tcp_program_ack (tc0); TCP_EVT_DBG (TCP_EVT_DUPACK_SENT, tc0, vnet_buffer (b0)->tcp); goto error; } @@ -340,7 +340,7 @@ tcp_segment_validate (tcp_worker_ctx_t * wrk, tcp_connection_t * tc0, } else { - tcp_program_ack (wrk, tc0); + tcp_program_ack (tc0); TCP_EVT_DBG (TCP_EVT_SYNACK_RCVD, tc0); *error0 = TCP_ERROR_SYN_ACKS_RCVD; } @@ -368,7 +368,7 @@ tcp_segment_validate (tcp_worker_ctx_t * wrk, tcp_connection_t * tc0, /* If not RST, send dup ack */ if (!tcp_rst (th0)) { - tcp_program_dupack (wrk, tc0); + tcp_program_dupack (tc0); TCP_EVT_DBG (TCP_EVT_DUPACK_SENT, tc0, vnet_buffer (b0)->tcp); } goto error; @@ -390,8 +390,9 @@ tcp_segment_validate (tcp_worker_ctx_t * wrk, tcp_connection_t * tc0, /* 4th: check the SYN bit (in window) */ if (PREDICT_FALSE (tcp_syn (th0))) { + /* As per RFC5961 send challenge ack instead of reset */ + tcp_program_ack (tc0); *error0 = TCP_ERROR_SPURIOUS_SYN; - tcp_send_reset (tc0); goto error; } @@ -507,7 +508,7 @@ tcp_update_rtt (tcp_connection_t * tc, u32 ack) * seq_lt (tc->snd_una, ack). This is a condition for calling update_rtt */ else if (tcp_opts_tstamp (&tc->rcv_opts) && tc->rcv_opts.tsecr) { - u32 now = tcp_time_now_w_thread (tc->c_thread_index); + u32 now = tcp_tstamp (tc); mrtt = clib_max (now - tc->rcv_opts.tsecr, 1); } @@ -774,6 +775,7 @@ scoreboard_update_bytes (tcp_connection_t * tc, sack_scoreboard_t * sb) sack_scoreboard_hole_t *left, *right; u32 bytes = 0, blks = 0; + sb->last_lost_bytes = 0; sb->lost_bytes = 0; sb->sacked_bytes = 0; left = scoreboard_last_hole (sb); @@ -802,6 +804,7 @@ scoreboard_update_bytes (tcp_connection_t * tc, sack_scoreboard_t * sb) do { sb->lost_bytes += scoreboard_hole_bytes (right); + sb->last_lost_bytes += left->is_lost ? 0 : left->end - left->start; left->is_lost = 1; left = scoreboard_prev_hole (sb, right); if (left) @@ -913,6 +916,7 @@ scoreboard_clear (sack_scoreboard_t * sb) sb->high_sacked = 0; sb->high_rxt = 0; sb->lost_bytes = 0; + sb->last_lost_bytes = 0; sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX; } #endif /* CLIB_MARCH_VARIANT */ @@ -933,13 +937,14 @@ tcp_scoreboard_is_sane_post_recovery (tcp_connection_t * tc) } #ifndef CLIB_MARCH_VARIANT + void tcp_rcv_sacks (tcp_connection_t * tc, u32 ack) { - sack_scoreboard_t *sb = &tc->sack_sb; - sack_block_t *blk, tmp; sack_scoreboard_hole_t *hole, *next_hole, *last_hole; u32 blk_index = 0, old_sacked_bytes, hole_index; + sack_scoreboard_t *sb = &tc->sack_sb; + sack_block_t *blk, tmp; int i, j; sb->last_sacked_bytes = 0; @@ -1054,7 +1059,6 @@ tcp_rcv_sacks (tcp_connection_t * tc, u32 ack) sb->last_bytes_delivered += sb->high_sacked - hole->end; } } - scoreboard_remove_hole (sb, hole); hole = next_hole; } @@ -1101,6 +1105,7 @@ tcp_rcv_sacks (tcp_connection_t * tc, u32 ack) scoreboard_update_bytes (tc, sb); sb->last_sacked_bytes = sb->sacked_bytes - (old_sacked_bytes - sb->last_bytes_delivered); + ASSERT (sb->last_sacked_bytes <= sb->sacked_bytes || tcp_in_recovery (tc)); ASSERT (sb->sacked_bytes == 0 || tcp_in_recovery (tc) || sb->sacked_bytes < tc->snd_nxt - seq_max (tc->snd_una, ack)); @@ -1108,6 +1113,8 @@ tcp_rcv_sacks (tcp_connection_t * tc, u32 ack) - seq_max (tc->snd_una, ack) || tcp_in_recovery (tc)); ASSERT (sb->head == TCP_INVALID_SACK_HOLE_INDEX || tcp_in_recovery (tc) || sb->holes[sb->head].start == ack + sb->snd_una_adv); + ASSERT (sb->last_lost_bytes <= sb->lost_bytes); + TCP_EVT_DBG (TCP_EVT_CC_SCOREBOARD, tc); } #endif /* CLIB_MARCH_VARIANT */ @@ -1184,16 +1191,15 @@ tcp_cc_recovery_exit (tcp_connection_t * tc) #ifndef CLIB_MARCH_VARIANT void -tcp_cc_fastrecovery_exit (tcp_connection_t * tc) +tcp_cc_fastrecovery_clear (tcp_connection_t * tc) { - tc->cc_algo->recovered (tc); tc->snd_rxt_bytes = 0; tc->rcv_dupacks = 0; - tc->snd_rxt_bytes = 0; tc->rtt_ts = 0; tcp_fastrecovery_off (tc); tcp_fastrecovery_first_off (tc); + tc->flags &= ~TCP_CONN_FRXT_PENDING; TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 3); } @@ -1212,8 +1218,9 @@ tcp_cc_congestion_undo (tcp_connection_t * tc) } else if (tcp_in_fastrecovery (tc)) { - tcp_cc_fastrecovery_exit (tc); + tcp_cc_fastrecovery_clear (tc); } + tcp_cc_undo_recovery (tc); ASSERT (tc->rto_boff == 0); TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 5); } @@ -1254,7 +1261,10 @@ tcp_cc_recover (tcp_connection_t * tc) if (tcp_in_recovery (tc)) tcp_cc_recovery_exit (tc); else if (tcp_in_fastrecovery (tc)) - tcp_cc_fastrecovery_exit (tc); + { + tcp_cc_recovered (tc); + tcp_cc_fastrecovery_clear (tc); + } ASSERT (tc->rto_boff == 0); ASSERT (!tcp_in_cong_recovery (tc)); @@ -1263,12 +1273,12 @@ tcp_cc_recover (tcp_connection_t * tc) } static void -tcp_cc_update (tcp_connection_t * tc, vlib_buffer_t * b) +tcp_cc_update (tcp_connection_t * tc, tcp_rate_sample_t * rs) { ASSERT (!tcp_in_cong_recovery (tc) || tcp_is_lost_fin (tc)); /* Congestion avoidance */ - tcp_cc_rcv_ack (tc); + tcp_cc_rcv_ack (tc, rs); /* If a cumulative ack, make sure dupacks is 0 */ tc->rcv_dupacks = 0; @@ -1296,84 +1306,12 @@ tcp_should_fastrecover (tcp_connection_t * tc) || tcp_should_fastrecover_sack (tc)); } -#ifndef CLIB_MARCH_VARIANT -void -tcp_program_fastretransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc) -{ - if (!(tc->flags & TCP_CONN_FRXT_PENDING)) - { - vec_add1 (wrk->pending_fast_rxt, tc->c_c_index); - tc->flags |= TCP_CONN_FRXT_PENDING; - } -} - -void -tcp_do_fastretransmits (tcp_worker_ctx_t * wrk) -{ - u32 *ongoing_fast_rxt, burst_bytes, sent_bytes, thread_index; - u32 max_burst_size, burst_size, n_segs = 0, n_segs_now; - tcp_connection_t *tc; - u64 last_cpu_time; - int i; - - if (vec_len (wrk->pending_fast_rxt) == 0 - && vec_len (wrk->postponed_fast_rxt) == 0) - return; - - thread_index = wrk->vm->thread_index; - last_cpu_time = wrk->vm->clib_time.last_cpu_time; - ongoing_fast_rxt = wrk->ongoing_fast_rxt; - vec_append (ongoing_fast_rxt, wrk->postponed_fast_rxt); - vec_append (ongoing_fast_rxt, wrk->pending_fast_rxt); - - _vec_len (wrk->postponed_fast_rxt) = 0; - _vec_len (wrk->pending_fast_rxt) = 0; - - max_burst_size = VLIB_FRAME_SIZE / vec_len (ongoing_fast_rxt); - max_burst_size = clib_max (max_burst_size, 1); - - for (i = 0; i < vec_len (ongoing_fast_rxt); i++) - { - tc = tcp_connection_get (ongoing_fast_rxt[i], thread_index); - if (!tcp_in_fastrecovery (tc)) - { - tc->flags &= ~TCP_CONN_FRXT_PENDING; - continue; - } - - if (n_segs >= VLIB_FRAME_SIZE) - { - vec_add1 (wrk->postponed_fast_rxt, ongoing_fast_rxt[i]); - continue; - } - - tc->flags &= ~TCP_CONN_FRXT_PENDING; - burst_size = clib_min (max_burst_size, VLIB_FRAME_SIZE - n_segs); - burst_bytes = transport_connection_tx_pacer_burst (&tc->connection, - last_cpu_time); - burst_size = clib_min (burst_size, burst_bytes / tc->snd_mss); - if (!burst_size) - { - tcp_program_fastretransmit (wrk, tc); - continue; - } - - n_segs_now = tcp_fast_retransmit (wrk, tc, burst_size); - sent_bytes = clib_min (n_segs_now * tc->snd_mss, burst_bytes); - transport_connection_tx_pacer_update_bytes (&tc->connection, - sent_bytes); - n_segs += n_segs_now; - } - _vec_len (ongoing_fast_rxt) = 0; - wrk->ongoing_fast_rxt = ongoing_fast_rxt; -} -#endif /* CLIB_MARCH_VARIANT */ - /** * One function to rule them all ... and in the darkness bind them */ static void -tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) +tcp_cc_handle_event (tcp_connection_t * tc, tcp_rate_sample_t * rs, + u32 is_dack) { u32 rxt_delivered; @@ -1381,7 +1319,7 @@ tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) { if (tc->bytes_acked) goto partial_ack; - tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index), tc); + tcp_program_fastretransmit (tc); return; } /* @@ -1399,7 +1337,7 @@ tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) if (tc->rcv_dupacks > TCP_DUPACK_THRESHOLD && !tc->bytes_acked) { ASSERT (tcp_in_fastrecovery (tc)); - tc->cc_algo->rcv_cong_ack (tc, TCP_CC_DUPACK); + tcp_cc_rcv_cong_ack (tc, TCP_CC_DUPACK, rs); return; } else if (tcp_should_fastrecover (tc)) @@ -1418,7 +1356,7 @@ tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) } tcp_cc_init_congestion (tc); - tc->cc_algo->rcv_cong_ack (tc, TCP_CC_DUPACK); + tcp_cc_rcv_cong_ack (tc, TCP_CC_DUPACK, rs); if (tcp_opts_sack_permitted (&tc->rcv_opts)) { @@ -1437,14 +1375,13 @@ tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) pacer_wnd = clib_max (0.1 * tc->cwnd, 2 * tc->snd_mss); tcp_connection_tx_pacer_reset (tc, pacer_wnd, 0 /* start bucket */ ); - tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index), - tc); + tcp_program_fastretransmit (tc); return; } else if (!tc->bytes_acked || (tc->bytes_acked && !tcp_in_cong_recovery (tc))) { - tc->cc_algo->rcv_cong_ack (tc, TCP_CC_DUPACK); + tcp_cc_rcv_cong_ack (tc, TCP_CC_DUPACK, rs); return; } else @@ -1499,7 +1436,7 @@ partial_ack: } /* Treat as congestion avoidance ack */ - tcp_cc_rcv_ack (tc); + tcp_cc_rcv_ack (tc, rs); return; } @@ -1517,7 +1454,7 @@ partial_ack: /* Post RTO timeout don't try anything fancy */ if (tcp_in_recovery (tc)) { - tcp_cc_rcv_ack (tc); + tcp_cc_rcv_ack (tc, rs); transport_add_tx_event (&tc->connection); return; } @@ -1548,20 +1485,18 @@ partial_ack: else { tcp_fastrecovery_first_on (tc); - /* Reuse last bytes delivered to track total bytes acked */ - tc->sack_sb.last_bytes_delivered += tc->bytes_acked; if (tc->snd_rxt_bytes > tc->bytes_acked) tc->snd_rxt_bytes -= tc->bytes_acked; else tc->snd_rxt_bytes = 0; } - tc->cc_algo->rcv_cong_ack (tc, TCP_CC_PARTIALACK); + tcp_cc_rcv_cong_ack (tc, TCP_CC_PARTIALACK, rs); /* * Since this was a partial ack, try to retransmit some more data */ - tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index), tc); + tcp_program_fastretransmit (tc); } /** @@ -1572,6 +1507,7 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b, tcp_header_t * th, u32 * error) { u32 prev_snd_wnd, prev_snd_una; + tcp_rate_sample_t rs = { 0 }; u8 is_dack; TCP_EVT_DBG (TCP_EVT_CC_STAT, tc); @@ -1601,7 +1537,7 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b, TCP_EVT_DBG (TCP_EVT_ACK_RCV_ERR, tc, 1, vnet_buffer (b)->tcp.ack_number); if (tcp_in_fastrecovery (tc) && tc->rcv_dupacks == TCP_DUPACK_THRESHOLD) - tcp_cc_handle_event (tc, 1); + tcp_cc_handle_event (tc, 0, 1); /* Don't drop yet */ return 0; } @@ -1629,6 +1565,9 @@ process_ack: tcp_update_rtt (tc, vnet_buffer (b)->tcp.ack_number); } + if (tc->flags & TCP_CONN_RATE_SAMPLE) + tcp_bt_sample_delivery_rate (tc, &rs); + TCP_EVT_DBG (TCP_EVT_ACK_RCVD, tc); /* @@ -1637,7 +1576,7 @@ process_ack: if (tcp_ack_is_cc_event (tc, b, prev_snd_wnd, prev_snd_una, &is_dack)) { - tcp_cc_handle_event (tc, is_dack); + tcp_cc_handle_event (tc, &rs, is_dack); if (!tcp_in_cong_recovery (tc)) { *error = TCP_ERROR_ACK_OK; @@ -1652,7 +1591,7 @@ process_ack: /* * Update congestion control (slow start/congestion avoidance) */ - tcp_cc_update (tc, b); + tcp_cc_update (tc, &rs); *error = TCP_ERROR_ACK_OK; return 0; } @@ -1692,9 +1631,13 @@ static void tcp_rcv_fin (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b, u32 * error) { + /* Reject out-of-order fins */ + if (vnet_buffer (b)->tcp.seq_end != tc->rcv_nxt) + return; + /* Account for the FIN and send ack */ tc->rcv_nxt += 1; - tcp_program_ack (wrk, tc); + tcp_program_ack (tc); /* Enter CLOSE-WAIT and notify session. To avoid lingering * in CLOSE-WAIT, set timer (reuse WAITCLOSE). */ tcp_connection_set_state (tc, TCP_STATE_CLOSE_WAIT); @@ -1871,7 +1814,7 @@ tcp_session_enqueue_ooo (tcp_connection_t * tc, vlib_buffer_t * b, newest = svm_fifo_newest_ooo_segment (s0->rx_fifo); if (newest) { - offset = ooo_segment_offset (s0->rx_fifo, newest); + offset = ooo_segment_offset_prod (s0->rx_fifo, newest); ASSERT (offset <= vnet_buffer (b)->tcp.seq_number - tc->rcv_nxt); start = tc->rcv_nxt + offset; end = start + ooo_segment_length (s0->rx_fifo, newest); @@ -1958,7 +1901,7 @@ tcp_segment_rcv (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, * retransmissions since we may not have any data to send */ if (seq_leq (vnet_buffer (b)->tcp.seq_end, tc->rcv_nxt)) { - tcp_program_ack (wrk, tc); + tcp_program_ack (tc); error = TCP_ERROR_SEGMENT_OLD; goto done; } @@ -1978,7 +1921,7 @@ tcp_segment_rcv (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, /* RFC2581: Enqueue and send DUPACK for fast retransmit */ error = tcp_session_enqueue_ooo (tc, b, n_data_bytes); - tcp_program_dupack (wrk, tc); + tcp_program_dupack (tc); TCP_EVT_DBG (TCP_EVT_DUPACK_SENT, tc, vnet_buffer (b)->tcp); goto done; } @@ -1995,7 +1938,7 @@ in_order: goto done; } - tcp_program_ack (wrk, tc); + tcp_program_ack (tc); done: return error; @@ -2526,9 +2469,9 @@ tcp46_syn_sent_inline (vlib_main_t * vm, vlib_node_runtime_t * node, * allocate session send reset */ if (session_stream_connect_notify (&new_tc0->connection, 0)) { - clib_warning ("connect notify fail"); tcp_send_reset_w_pkt (new_tc0, b0, my_thread_index, is_ip4); tcp_connection_cleanup (new_tc0); + error0 = TCP_ERROR_CREATE_SESSION_FAIL; goto drop; } @@ -2550,6 +2493,7 @@ tcp46_syn_sent_inline (vlib_main_t * vm, vlib_node_runtime_t * node, tcp_connection_cleanup (new_tc0); tcp_send_reset_w_pkt (tc0, b0, my_thread_index, is_ip4); TCP_EVT_DBG (TCP_EVT_RST_SENT, tc0); + error0 = TCP_ERROR_CREATE_SESSION_FAIL; goto drop; } @@ -2572,7 +2516,7 @@ tcp46_syn_sent_inline (vlib_main_t * vm, vlib_node_runtime_t * node, } else { - tcp_program_ack (wrk, new_tc0); + tcp_program_ack (new_tc0); } drop: @@ -2805,6 +2749,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, { tcp_connection_set_state (tc0, TCP_STATE_CLOSED); tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); + session_transport_closed_notify (&tc0->connection); goto drop; } @@ -2837,7 +2782,8 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, break; /* Still have outstanding tx data */ - if (transport_max_tx_dequeue (&tc0->connection)) + max_dequeue = transport_max_tx_dequeue (&tc0->connection); + if (max_dequeue > tc0->burst_acked) break; tcp_send_fin (tc0); @@ -2858,6 +2804,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, tcp_connection_timers_reset (tc0); tcp_connection_set_state (tc0, TCP_STATE_TIME_WAIT); tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, TCP_TIMEWAIT_TIME); + session_transport_closed_notify (&tc0->connection); goto drop; break; @@ -2877,6 +2824,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, } tcp_connection_set_state (tc0, TCP_STATE_CLOSED); + session_transport_closed_notify (&tc0->connection); /* Don't free the connection from the data path since * we can't ensure that we have no packets already enqueued @@ -2898,7 +2846,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (!is_fin0) goto drop; - tcp_program_ack (wrk, tc0); + tcp_program_ack (tc0); tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE, TCP_TIMEWAIT_TIME); goto drop; @@ -2938,7 +2886,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, case TCP_STATE_ESTABLISHED: /* Account for the FIN and send ack */ tc0->rcv_nxt += 1; - tcp_program_ack (wrk, tc0); + tcp_program_ack (tc0); tcp_connection_set_state (tc0, TCP_STATE_CLOSE_WAIT); tcp_program_disconnect (wrk, tc0); tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE, TCP_CLOSEWAIT_TIME); @@ -2972,7 +2920,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, else { tcp_connection_set_state (tc0, TCP_STATE_CLOSING); - tcp_program_ack (wrk, tc0); + tcp_program_ack (tc0); /* Wait for ACK for our FIN but not forever */ tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); } @@ -2983,7 +2931,8 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, tcp_connection_set_state (tc0, TCP_STATE_TIME_WAIT); tcp_connection_timers_reset (tc0); tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, TCP_TIMEWAIT_TIME); - tcp_program_ack (wrk, tc0); + tcp_program_ack (tc0); + session_transport_closed_notify (&tc0->connection); break; case TCP_STATE_TIME_WAIT: /* Remain in the TIME-WAIT state. Restart the time-wait @@ -3008,6 +2957,7 @@ tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node, thread_index); tcp_inc_counter (rcv_process, TCP_ERROR_MSG_QUEUE_FULL, errors); tcp_handle_postponed_dequeues (wrk); + tcp_handle_disconnects (wrk); vlib_buffer_free (vm, first_buffer, from_frame->n_vectors); return from_frame->n_vectors; @@ -3185,16 +3135,16 @@ tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node, tcp_connection_init_vars (child0); child0->rto = TCP_RTO_MIN; - TCP_EVT_DBG (TCP_EVT_SYN_RCVD, child0, 1); if (session_stream_accept (&child0->connection, lc0->c_s_index, - 0 /* notify */ )) + lc0->c_thread_index, 0 /* notify */ )) { tcp_connection_cleanup (child0); error0 = TCP_ERROR_CREATE_SESSION_FAIL; goto drop; } + TCP_EVT_DBG (TCP_EVT_SYN_RCVD, child0, 1); child0->tx_fifo_size = transport_tx_fifo_size (&child0->connection); tcp_send_synack (child0); tcp_timer_set (child0, TCP_TIMER_ESTABLISH, TCP_SYN_RCVD_TIME); @@ -3341,9 +3291,9 @@ tcp_input_set_error_next (tcp_main_t * tm, u16 * next, u32 * error, u8 is_ip4) } } -static inline tcp_connection_t * +always_inline tcp_connection_t * tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error, - u8 is_ip4) + u8 is_ip4, u8 is_nolookup) { u32 fib_index = vnet_buffer (b)->ip.fib_index; int n_advance_bytes, n_data_bytes; @@ -3372,10 +3322,12 @@ tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error, return 0; } - tc = session_lookup_connection_wt4 (fib_index, &ip4->dst_address, - &ip4->src_address, tcp->dst_port, - tcp->src_port, TRANSPORT_PROTO_TCP, - thread_index, &result); + if (!is_nolookup) + tc = session_lookup_connection_wt4 (fib_index, &ip4->dst_address, + &ip4->src_address, tcp->dst_port, + tcp->src_port, + TRANSPORT_PROTO_TCP, thread_index, + &result); } else { @@ -3397,20 +3349,31 @@ tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error, *error = TCP_ERROR_LENGTH; return 0; } - if (PREDICT_FALSE - (ip6_address_is_link_local_unicast (&ip6->dst_address))) + + if (!is_nolookup) { - ip4_main_t *im = &ip4_main; - fib_index = vec_elt (im->fib_index_by_sw_if_index, - vnet_buffer (b)->sw_if_index[VLIB_RX]); - } + if (PREDICT_FALSE + (ip6_address_is_link_local_unicast (&ip6->dst_address))) + { + ip4_main_t *im = &ip4_main; + fib_index = vec_elt (im->fib_index_by_sw_if_index, + vnet_buffer (b)->sw_if_index[VLIB_RX]); + } - tc = session_lookup_connection_wt6 (fib_index, &ip6->dst_address, - &ip6->src_address, tcp->dst_port, - tcp->src_port, TRANSPORT_PROTO_TCP, - thread_index, &result); + tc = session_lookup_connection_wt6 (fib_index, &ip6->dst_address, + &ip6->src_address, + tcp->dst_port, tcp->src_port, + TRANSPORT_PROTO_TCP, + thread_index, &result); + } } + if (is_nolookup) + tc = + (transport_connection_t *) tcp_connection_get (vnet_buffer (b)-> + tcp.connection_index, + thread_index); + vnet_buffer (b)->tcp.seq_number = clib_net_to_host_u32 (tcp->seq_number); vnet_buffer (b)->tcp.ack_number = clib_net_to_host_u32 (tcp->ack_number); vnet_buffer (b)->tcp.data_offset = n_advance_bytes; @@ -3452,7 +3415,7 @@ tcp_input_dispatch_buffer (tcp_main_t * tm, tcp_connection_t * tc, always_inline uword tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_ip4) + vlib_frame_t * frame, int is_ip4, u8 is_nolookup) { u32 n_left_from, *from, thread_index = vm->thread_index; tcp_main_t *tm = vnet_get_tcp_main (); @@ -3483,8 +3446,10 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, next[0] = next[1] = TCP_INPUT_NEXT_DROP; - tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4); - tc1 = tcp_input_lookup_buffer (b[1], thread_index, &error1, is_ip4); + tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4, + is_nolookup); + tc1 = tcp_input_lookup_buffer (b[1], thread_index, &error1, is_ip4, + is_nolookup); if (PREDICT_TRUE (!tc0 + !tc1 == 0)) { @@ -3534,7 +3499,8 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, } next[0] = TCP_INPUT_NEXT_DROP; - tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4); + tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4, + is_nolookup); if (PREDICT_TRUE (tc0 != 0)) { ASSERT (tcp_lookup_is_valid (tc0, tcp_buffer_hdr (b[0]))); @@ -3556,16 +3522,74 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, return frame->n_vectors; } +VLIB_NODE_FN (tcp4_input_nolookup_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ , + 1 /* is_nolookup */ ); +} + +VLIB_NODE_FN (tcp6_input_nolookup_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ , + 1 /* is_nolookup */ ); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (tcp4_input_nolookup_node) = +{ + .name = "tcp4-input-nolookup", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + .n_errors = TCP_N_ERROR, + .error_strings = tcp_error_strings, + .n_next_nodes = TCP_INPUT_N_NEXT, + .next_nodes = + { +#define _(s,n) [TCP_INPUT_NEXT_##s] = n, + foreach_tcp4_input_next +#undef _ + }, + .format_buffer = format_tcp_header, + .format_trace = format_tcp_rx_trace, +}; +/* *INDENT-ON* */ + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (tcp6_input_nolookup_node) = +{ + .name = "tcp6-input-nolookup", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + .n_errors = TCP_N_ERROR, + .error_strings = tcp_error_strings, + .n_next_nodes = TCP_INPUT_N_NEXT, + .next_nodes = + { +#define _(s,n) [TCP_INPUT_NEXT_##s] = n, + foreach_tcp6_input_next +#undef _ + }, + .format_buffer = format_tcp_header, + .format_trace = format_tcp_rx_trace, +}; +/* *INDENT-ON* */ + VLIB_NODE_FN (tcp4_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { - return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ ); + return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ , + 0 /* is_nolookup */ ); } VLIB_NODE_FN (tcp6_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { - return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ ); + return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ , + 0 /* is_nolookup */ ); } /* *INDENT-OFF* */