X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Ftcp%2Ftcp_output.c;h=aff2d9323310bd19c183ebceba1351b2b50a40c5;hb=4e783b9c901cf90e58c3f921bb17170ab23e540a;hp=4298611205372c4389dffe197dd40571fb53323d;hpb=fd4c3fe364becc02527ed5f9088d904c7bc34a6f;p=vpp.git diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c index 42986112053..aff2d932331 100644 --- a/src/vnet/tcp/tcp_output.c +++ b/src/vnet/tcp/tcp_output.c @@ -55,12 +55,12 @@ format_tcp_tx_trace (u8 * s, va_list * args) CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); tcp_tx_trace_t *t = va_arg (*args, tcp_tx_trace_t *); + tcp_connection_t *tc = &t->tcp_connection; u32 indent = format_get_indent (s); - s = format (s, "%U\n%U%U", - format_tcp_header, &t->tcp_header, 128, - format_white_space, indent, - format_tcp_connection, &t->tcp_connection, 1); + s = format (s, "%U state %U\n%U%U", format_tcp_connection_id, tc, + format_tcp_state, tc->state, format_white_space, indent, + format_tcp_header, &t->tcp_header, 128); return s; } @@ -115,8 +115,6 @@ tcp_update_rcv_wnd (tcp_connection_t * tc) u32 available_space, wnd; i32 observed_wnd; - ASSERT (tc->rcv_opts.mss < transport_rx_fifo_size (&tc->connection)); - /* * Figure out how much space we have available */ @@ -411,7 +409,7 @@ tcp_update_burst_snd_vars (tcp_connection_t * tc) if (tc->snd_una == tc->snd_nxt) { tcp_cc_event (tc, TCP_CC_EVT_START_TX); - tcp_connection_tx_pacer_reset (tc, tc->cwnd, TRANSPORT_PACER_MIN_MSS); + tcp_connection_tx_pacer_reset (tc, tc->cwnd, TRANSPORT_PACER_MIN_BURST); } } @@ -690,78 +688,76 @@ tcp_enqueue_to_output (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, u32 bi, #endif /* CLIB_MARCH_VARIANT */ static int -tcp_make_reset_in_place (vlib_main_t * vm, vlib_buffer_t * b0, - tcp_state_t state, u8 thread_index, u8 is_ip4) +tcp_make_reset_in_place (vlib_main_t * vm, vlib_buffer_t * b, u8 is_ip4) { ip4_header_t *ih4; ip6_header_t *ih6; - tcp_header_t *th0; - ip4_address_t src_ip40, dst_ip40; - ip6_address_t src_ip60, dst_ip60; + tcp_header_t *th; + ip4_address_t src_ip4, dst_ip4; + ip6_address_t src_ip6, dst_ip6; u16 src_port, dst_port; - u32 tmp; - u32 seq, ack; + u32 tmp, len, seq, ack; u8 flags; /* Find IP and TCP headers */ - th0 = tcp_buffer_hdr (b0); + th = tcp_buffer_hdr (b); /* Save src and dst ip */ if (is_ip4) { - ih4 = vlib_buffer_get_current (b0); + ih4 = vlib_buffer_get_current (b); ASSERT ((ih4->ip_version_and_header_length & 0xF0) == 0x40); - src_ip40.as_u32 = ih4->src_address.as_u32; - dst_ip40.as_u32 = ih4->dst_address.as_u32; + src_ip4.as_u32 = ih4->src_address.as_u32; + dst_ip4.as_u32 = ih4->dst_address.as_u32; } else { - ih6 = vlib_buffer_get_current (b0); + ih6 = vlib_buffer_get_current (b); ASSERT ((ih6->ip_version_traffic_class_and_flow_label & 0xF0) == 0x60); - clib_memcpy_fast (&src_ip60, &ih6->src_address, sizeof (ip6_address_t)); - clib_memcpy_fast (&dst_ip60, &ih6->dst_address, sizeof (ip6_address_t)); + clib_memcpy_fast (&src_ip6, &ih6->src_address, sizeof (ip6_address_t)); + clib_memcpy_fast (&dst_ip6, &ih6->dst_address, sizeof (ip6_address_t)); } - src_port = th0->src_port; - dst_port = th0->dst_port; + src_port = th->src_port; + dst_port = th->dst_port; + flags = TCP_FLAG_RST; - /* Try to determine what/why we're actually resetting */ - if (state == TCP_STATE_CLOSED) + /* + * RFC 793. If the ACK bit is off, sequence number zero is used, + * + * If the ACK bit is on, + * + */ + if (tcp_ack (th)) { - if (!tcp_syn (th0)) - return -1; - - tmp = clib_net_to_host_u32 (th0->seq_number); - - /* Got a SYN for no listener. */ - flags = TCP_FLAG_RST | TCP_FLAG_ACK; - ack = clib_host_to_net_u32 (tmp + 1); - seq = 0; + seq = th->ack_number; + ack = 0; } else { - flags = TCP_FLAG_RST; - seq = th0->ack_number; - ack = 0; + flags |= TCP_FLAG_ACK; + tmp = clib_net_to_host_u32 (th->seq_number); + len = vnet_buffer (b)->tcp.data_len + tcp_is_syn (th) + tcp_is_fin (th); + ack = clib_host_to_net_u32 (tmp + len); + seq = 0; } - tcp_reuse_buffer (vm, b0); - tcp_trajectory_add_start (b0, 4); - th0 = vlib_buffer_push_tcp_net_order (b0, dst_port, src_port, seq, ack, - sizeof (tcp_header_t), flags, 0); + tcp_reuse_buffer (vm, b); + tcp_trajectory_add_start (b, 4); + th = vlib_buffer_push_tcp_net_order (b, dst_port, src_port, seq, ack, + sizeof (tcp_header_t), flags, 0); if (is_ip4) { - ih4 = vlib_buffer_push_ip4 (vm, b0, &dst_ip40, &src_ip40, + ih4 = vlib_buffer_push_ip4 (vm, b, &dst_ip4, &src_ip4, IP_PROTOCOL_TCP, 1); - th0->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ih4); + th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ih4); } else { int bogus = ~0; - ih6 = vlib_buffer_push_ip6 (vm, b0, &dst_ip60, &src_ip60, - IP_PROTOCOL_TCP); - th0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ih6, &bogus); + ih6 = vlib_buffer_push_ip6 (vm, b, &dst_ip6, &src_ip6, IP_PROTOCOL_TCP); + th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ih6, &bogus); ASSERT (!bogus); } @@ -877,7 +873,7 @@ tcp_send_reset (tcp_connection_t * tc) tc->snd_opts_len = tcp_make_options (tc, &tc->snd_opts, tc->state); tcp_hdr_opts_len = tc->snd_opts_len + sizeof (tcp_header_t); - advertise_wnd = tcp_window_to_advertise (tc, TCP_STATE_ESTABLISHED); + advertise_wnd = tc->rcv_wnd >> tc->rcv_wscale; flags = TCP_FLAG_RST; th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->snd_nxt, tc->rcv_nxt, tcp_hdr_opts_len, flags, @@ -896,26 +892,15 @@ static void tcp_push_ip_hdr (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b) { - tcp_header_t *th = vlib_buffer_get_current (b); - vlib_main_t *vm = wrk->vm; if (tc->c_is_ip4) { - ip4_header_t *ih; - ih = vlib_buffer_push_ip4 (vm, b, &tc->c_lcl_ip4, - &tc->c_rmt_ip4, IP_PROTOCOL_TCP, - tcp_csum_offload (tc)); - th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ih); + vlib_buffer_push_ip4 (wrk->vm, b, &tc->c_lcl_ip4, &tc->c_rmt_ip4, + IP_PROTOCOL_TCP, tcp_csum_offload (tc)); } else { - ip6_header_t *ih; - int bogus = ~0; - - ih = vlib_buffer_push_ip6_custom (vm, b, &tc->c_lcl_ip6, - &tc->c_rmt_ip6, IP_PROTOCOL_TCP, - tc->ipv6_flow_label); - th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ih, &bogus); - ASSERT (!bogus); + vlib_buffer_push_ip6_custom (wrk->vm, b, &tc->c_lcl_ip6, &tc->c_rmt_ip6, + IP_PROTOCOL_TCP, tc->ipv6_flow_label); } } @@ -985,32 +970,6 @@ tcp_send_synack (tcp_connection_t * tc) TCP_EVT (TCP_EVT_SYNACK_SENT, tc); } -/** - * Flush ip lookup tx frames populated by timer pops - */ -static void -tcp_flush_frame_to_ip_lookup (tcp_worker_ctx_t * wrk, u8 is_ip4) -{ - if (wrk->ip_lookup_tx_frames[!is_ip4]) - { - u32 next_index; - next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index; - vlib_put_frame_to_node (wrk->vm, next_index, - wrk->ip_lookup_tx_frames[!is_ip4]); - wrk->ip_lookup_tx_frames[!is_ip4] = 0; - } -} - -/** - * Flush v4 and v6 tcp and ip-lookup tx frames for thread index - */ -void -tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk) -{ - tcp_flush_frame_to_ip_lookup (wrk, 1); - tcp_flush_frame_to_ip_lookup (wrk, 0); -} - /** * Send FIN */ @@ -1221,13 +1180,8 @@ tcp_program_retransmit (tcp_connection_t * tc) * Sends delayed ACK when timer expires */ void -tcp_timer_delack_handler (u32 index) +tcp_timer_delack_handler (tcp_connection_t * tc) { - u32 thread_index = vlib_get_thread_index (); - tcp_connection_t *tc; - - tc = tcp_connection_get (index, thread_index); - tc->timers[TCP_TIMER_DELACK] = TCP_TIMER_HANDLE_INVALID; tcp_send_ack (tc); } @@ -1413,6 +1367,7 @@ tcp_prepare_retransmit_segment (tcp_worker_ctx_t * wrk, tc->bytes_retrans += n_bytes; tc->segs_retrans += 1; + tcp_workerp_stats_inc (wrk, rxt_segs, 1); TCP_EVT (TCP_EVT_CC_RTX, tc, offset, n_bytes); return n_bytes; @@ -1457,23 +1412,19 @@ tcp_cc_init_rxt_timeout (tcp_connection_t * tc) } void -tcp_timer_retransmit_handler (u32 tc_index) +tcp_timer_retransmit_handler (tcp_connection_t * tc) { - u32 thread_index = vlib_get_thread_index (); - tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); vlib_main_t *vm = wrk->vm; - tcp_connection_t *tc; vlib_buffer_t *b = 0; u32 bi, n_bytes; - tc = tcp_connection_get (tc_index, thread_index); + tcp_workerp_stats_inc (wrk, tr_events, 1); - /* Note: the connection may have been closed and pool_put */ - if (PREDICT_FALSE (tc == 0 || tc->state == TCP_STATE_SYN_SENT)) + /* Should be handled by a different handler */ + if (PREDICT_FALSE (tc->state == TCP_STATE_SYN_SENT)) return; - tc->timers[TCP_TIMER_RETRANSMIT] = TCP_TIMER_HANDLE_INVALID; - /* Wait-close and retransmit could pop at the same time */ if (tc->state == TCP_STATE_CLOSED) return; @@ -1518,8 +1469,10 @@ tcp_timer_retransmit_handler (u32 tc_index) tcp_send_reset (tc); tcp_connection_set_state (tc, TCP_STATE_CLOSED); session_transport_closing_notify (&tc->connection); + session_transport_closed_notify (&tc->connection); tcp_connection_timers_reset (tc); - tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.closewait_time); + tcp_program_cleanup (wrk, tc); + tcp_workerp_stats_inc (wrk, tr_abort, 1); return; } @@ -1570,7 +1523,8 @@ tcp_timer_retransmit_handler (u32 tc_index) { tcp_connection_set_state (tc, TCP_STATE_CLOSED); tcp_connection_timers_reset (tc); - tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time); + tcp_program_cleanup (wrk, tc); + tcp_workerp_stats_inc (wrk, tr_abort, 1); return; } @@ -1605,23 +1559,17 @@ tcp_timer_retransmit_handler (u32 tc_index) * SYN retransmit timer handler. Active open only. */ void -tcp_timer_retransmit_syn_handler (u32 tc_index) +tcp_timer_retransmit_syn_handler (tcp_connection_t * tc) { - u32 thread_index = vlib_get_thread_index (); - tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); vlib_main_t *vm = wrk->vm; - tcp_connection_t *tc; vlib_buffer_t *b = 0; u32 bi; - tc = tcp_half_open_connection_get (tc_index); - /* Note: the connection may have transitioned to ESTABLISHED... */ - if (PREDICT_FALSE (tc == 0 || tc->state != TCP_STATE_SYN_SENT)) + if (PREDICT_FALSE (tc->state != TCP_STATE_SYN_SENT)) return; - tc->timers[TCP_TIMER_RETRANSMIT_SYN] = TCP_TIMER_HANDLE_INVALID; - /* Half-open connection actually moved to established but we were * waiting for syn retransmit to pop to call cleanup from the right * thread. */ @@ -1674,29 +1622,20 @@ tcp_timer_retransmit_syn_handler (u32 tc_index) * */ void -tcp_timer_persist_handler (u32 index) +tcp_timer_persist_handler (tcp_connection_t * tc) { - u32 thread_index = vlib_get_thread_index (); - tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); u32 bi, max_snd_bytes, available_bytes, offset; tcp_main_t *tm = vnet_get_tcp_main (); vlib_main_t *vm = wrk->vm; - tcp_connection_t *tc; vlib_buffer_t *b; int n_bytes = 0; u8 *data; - tc = tcp_connection_get_if_valid (index, thread_index); - if (!tc) - return; - - /* Make sure timer handle is set to invalid */ - tc->timers[TCP_TIMER_PERSIST] = TCP_TIMER_HANDLE_INVALID; - /* Problem already solved or worse */ if (tc->state == TCP_STATE_CLOSED || tc->snd_wnd > tc->snd_mss || (tc->flags & TCP_CONN_FINSNT)) - return; + goto update_scheduler; available_bytes = transport_max_tx_dequeue (&tc->connection); offset = tc->snd_nxt - tc->snd_una; @@ -1710,10 +1649,7 @@ tcp_timer_persist_handler (u32 index) } if (available_bytes <= offset) - { - ASSERT (tcp_timer_is_active (tc, TCP_TIMER_RETRANSMIT)); - return; - } + goto update_scheduler; /* Increment RTO backoff */ tc->rto_boff += 1; @@ -1727,6 +1663,7 @@ tcp_timer_persist_handler (u32 index) tcp_persist_timer_set (tc); return; } + b = vlib_get_buffer (vm, bi); data = tcp_init_buffer (vm, b); @@ -1755,6 +1692,13 @@ tcp_timer_persist_handler (u32 index) /* Just sent new data, enable retransmit */ tcp_retransmit_timer_update (tc); + + return; + +update_scheduler: + + if (tcp_is_descheduled (tc)) + transport_connection_reschedule (&tc->connection); } /** @@ -1850,6 +1794,9 @@ tcp_retransmit_should_retry_head (tcp_connection_t * tc, u32 tx_adv_sack = sb->high_sacked - tc->snd_congestion; f64 rr = (f64) tc->ssthresh / tc->prev_cwnd; + if (tcp_fastrecovery_first (tc)) + return 1; + return (tx_adv_sack > (tc->snd_una - tc->prr_start) * rr); } @@ -1871,9 +1818,9 @@ static int tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, u32 burst_size) { - u8 snd_limited = 0, can_rescue = 0, reset_pacer = 0; u32 n_written = 0, offset, max_bytes, n_segs = 0; - u32 bi, max_deq, burst_bytes, sent_bytes; + u8 snd_limited = 0, can_rescue = 0; + u32 bi, max_deq, burst_bytes; sack_scoreboard_hole_t *hole; vlib_main_t *vm = wrk->vm; vlib_buffer_t *b = 0; @@ -1896,12 +1843,7 @@ tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, snd_space = tcp_fastrecovery_prr_snd_space (tc); if (snd_space < tc->snd_mss) - { - reset_pacer = burst_bytes > tc->snd_mss; - goto done; - } - - reset_pacer = snd_space < burst_bytes; + goto done; sb = &tc->sack_sb; @@ -1928,6 +1870,8 @@ tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, ASSERT (tc->rxt_delivered <= tc->snd_rxt_bytes); } + tcp_fastrecovery_first_off (tc); + TCP_EVT (TCP_EVT_CC_EVT, tc, 0); hole = scoreboard_get_hole (sb, sb->cur_rxt_hole); @@ -1946,8 +1890,10 @@ tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, u32 n_segs_new; int av_wnd; + /* Make sure we don't exceed available window and leave space + * for one more packet, to avoid zero window acks */ av_wnd = (int) tc->snd_wnd - (tc->snd_nxt - tc->snd_una); - av_wnd = clib_max (av_wnd, 0); + av_wnd = clib_max (av_wnd - tc->snd_mss, 0); snd_space = clib_min (snd_space, av_wnd); snd_space = clib_min (max_deq, snd_space); burst_size = clib_min (burst_size - n_segs, @@ -1970,16 +1916,16 @@ tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, * unSACKed sequence number SHOULD be returned, and RescueRxt set to * RecoveryPoint. HighRxt MUST NOT be updated. */ - max_bytes = clib_min (tc->snd_mss, - tc->snd_congestion - tc->snd_una); + hole = scoreboard_last_hole (sb); + max_bytes = clib_min (tc->snd_mss, hole->end - hole->start); max_bytes = clib_min (max_bytes, snd_space); - offset = tc->snd_congestion - tc->snd_una - max_bytes; - sb->rescue_rxt = tc->snd_congestion; + offset = hole->end - tc->snd_una - max_bytes; n_written = tcp_prepare_retransmit_segment (wrk, tc, offset, max_bytes, &b); if (!n_written) goto done; + sb->rescue_rxt = tc->snd_congestion; bi = vlib_get_buffer_index (vm, b); tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); n_segs += 1; @@ -2015,17 +1961,7 @@ tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, done: - if (reset_pacer) - { - transport_connection_tx_pacer_reset_bucket (&tc->connection); - } - else - { - sent_bytes = clib_min (n_segs * tc->snd_mss, burst_bytes); - transport_connection_tx_pacer_update_bytes (&tc->connection, - sent_bytes); - } - + transport_connection_tx_pacer_reset_bucket (&tc->connection, 0); return n_segs; } @@ -2134,6 +2070,7 @@ tcp_send_acks (tcp_connection_t * tc, u32 max_burst_size) if (!vec_len (tc->snd_sacks)) { tcp_send_ack (tc); + tc->dupacks_out += 1; tc->pending_dupacks = 0; return 1; } @@ -2256,16 +2193,17 @@ static void tcp46_output_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node, u32 * to_next, u32 n_bufs) { - u32 n_trace = vlib_get_trace_count (vm, node); tcp_connection_t *tc; tcp_tx_trace_t *t; vlib_buffer_t *b; tcp_header_t *th; int i; - for (i = 0; i < clib_min (n_trace, n_bufs); i++) + for (i = 0; i < n_bufs; i++) { b = vlib_get_buffer (vm, to_next[i]); + if (!(b->flags & VLIB_BUFFER_IS_TRACED)) + continue; th = vlib_buffer_get_current (b); tc = tcp_connection_get (vnet_buffer (b)->tcp.connection_index, vm->thread_index); @@ -2279,19 +2217,16 @@ always_inline void tcp_output_push_ip (vlib_main_t * vm, vlib_buffer_t * b0, tcp_connection_t * tc0, u8 is_ip4) { - u8 __clib_unused *ih0; - tcp_header_t __clib_unused *th0 = vlib_buffer_get_current (b0); - - TCP_EVT (TCP_EVT_OUTPUT, tc0, th0->flags, b0->current_length); + TCP_EVT (TCP_EVT_OUTPUT, tc0, + ((tcp_header_t *) vlib_buffer_get_current (b0))->flags, + b0->current_length); if (is_ip4) - ih0 = vlib_buffer_push_ip4 (vm, b0, &tc0->c_lcl_ip4, &tc0->c_rmt_ip4, - IP_PROTOCOL_TCP, tcp_csum_offload (tc0)); + vlib_buffer_push_ip4 (vm, b0, &tc0->c_lcl_ip4, &tc0->c_rmt_ip4, + IP_PROTOCOL_TCP, tcp_csum_offload (tc0)); else - ih0 = - vlib_buffer_push_ip6_custom (vm, b0, &tc0->c_lcl_ip6, &tc0->c_rmt_ip6, - IP_PROTOCOL_TCP, tc0->ipv6_flow_label); - + vlib_buffer_push_ip6_custom (vm, b0, &tc0->c_lcl_ip6, &tc0->c_rmt_ip6, + IP_PROTOCOL_TCP, tc0->ipv6_flow_label); } always_inline void @@ -2546,8 +2481,8 @@ static uword tcp46_send_reset_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, u8 is_ip4) { + u32 error0 = TCP_ERROR_RST_SENT, next0 = TCP_RESET_NEXT_IP_LOOKUP; 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; @@ -2562,11 +2497,10 @@ tcp46_send_reset_inline (vlib_main_t * vm, vlib_node_runtime_t * node, while (n_left_from > 0 && n_left_to_next > 0) { - u32 bi0; vlib_buffer_t *b0; tcp_tx_trace_t *t0; tcp_header_t *th0; - u32 error0 = TCP_ERROR_RST_SENT, next0 = TCP_RESET_NEXT_IP_LOOKUP; + u32 bi0; bi0 = from[0]; to_next[0] = bi0; @@ -2576,20 +2510,11 @@ tcp46_send_reset_inline (vlib_main_t * vm, vlib_node_runtime_t * node, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - - if (tcp_make_reset_in_place (vm, b0, vnet_buffer (b0)->tcp.flags, - my_thread_index, is_ip4)) - { - error0 = TCP_ERROR_LOOKUP_DROPS; - next0 = TCP_RESET_NEXT_DROP; - goto done; - } + tcp_make_reset_in_place (vm, b0, is_ip4); /* Prepare to send to IP lookup */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; - next0 = TCP_RESET_NEXT_IP_LOOKUP; - done: b0->error = node->errors[error0]; b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))