{
u32 thread_index = vm->thread_index, errors = 0;
tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
- u32 n_left_from, *from, *first_buffer;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 err_counters[TCP_N_ERROR] = { 0 };
+ u32 n_left_from, *from;
if (node->flags & VLIB_NODE_FLAG_TRACE)
tcp_established_trace_frame (vm, node, frame, is_ip4);
- first_buffer = from = vlib_frame_vector_args (frame);
+ from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ b = bufs;
+
while (n_left_from > 0)
{
- u32 bi0, error0 = TCP_ERROR_ACK_OK;
- vlib_buffer_t *b0;
- tcp_header_t *th0;
- tcp_connection_t *tc0;
+ u32 error = TCP_ERROR_ACK_OK;
+ tcp_connection_t *tc;
+ tcp_header_t *th;
if (n_left_from > 1)
{
- vlib_buffer_t *pb;
- pb = vlib_get_buffer (vm, from[1]);
- vlib_prefetch_buffer_header (pb, LOAD);
- CLIB_PREFETCH (pb->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ vlib_prefetch_buffer_header (b[1], LOAD);
+ CLIB_PREFETCH (b[1]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
}
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- tc0 = tcp_connection_get (vnet_buffer (b0)->tcp.connection_index,
- thread_index);
+ tc = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
+ thread_index);
- if (PREDICT_FALSE (tc0 == 0))
+ if (PREDICT_FALSE (tc == 0))
{
- error0 = TCP_ERROR_INVALID_CONNECTION;
+ error = TCP_ERROR_INVALID_CONNECTION;
goto done;
}
- th0 = tcp_buffer_hdr (b0);
+ th = tcp_buffer_hdr (b[0]);
/* TODO header prediction fast path */
/* 1-4: check SEQ, RST, SYN */
- if (PREDICT_FALSE (tcp_segment_validate (wrk, tc0, b0, th0, &error0)))
+ if (PREDICT_FALSE (tcp_segment_validate (wrk, tc, b[0], th, &error)))
{
- TCP_EVT (TCP_EVT_SEG_INVALID, tc0, vnet_buffer (b0)->tcp);
+ TCP_EVT (TCP_EVT_SEG_INVALID, tc, vnet_buffer (b[0])->tcp);
goto done;
}
/* 5: check the ACK field */
- if (PREDICT_FALSE (tcp_rcv_ack (wrk, tc0, b0, th0, &error0)))
+ if (PREDICT_FALSE (tcp_rcv_ack (wrk, tc, b[0], th, &error)))
goto done;
/* 6: check the URG bit TODO */
/* 7: process the segment text */
- if (vnet_buffer (b0)->tcp.data_len)
- error0 = tcp_segment_rcv (wrk, tc0, b0);
+ if (vnet_buffer (b[0])->tcp.data_len)
+ error = tcp_segment_rcv (wrk, tc, b[0]);
/* 8: check the FIN bit */
- if (PREDICT_FALSE (tcp_is_fin (th0)))
- tcp_rcv_fin (wrk, tc0, b0, &error0);
+ if (PREDICT_FALSE (tcp_is_fin (th)))
+ tcp_rcv_fin (wrk, tc, b[0], &error);
done:
- tcp_inc_err_counter (err_counters, error0, 1);
+ tcp_inc_err_counter (err_counters, error, 1);
+
+ n_left_from -= 1;
+ b += 1;
}
errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_TCP,
tcp_store_err_counters (established, err_counters);
tcp_handle_postponed_dequeues (wrk);
tcp_handle_disconnects (wrk);
- vlib_buffer_free (vm, first_buffer, frame->n_vectors);
+ vlib_buffer_free (vm, from, frame->n_vectors);
return frame->n_vectors;
}
return 0;
}
+static void
+tcp46_syn_sent_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ u32 *from, u32 n_bufs)
+{
+ tcp_connection_t *tc = 0;
+ tcp_rx_trace_t *t;
+ vlib_buffer_t *b;
+ int i;
+
+ for (i = 0; i < n_bufs; i++)
+ {
+ b = vlib_get_buffer (vm, from[i]);
+ if (!(b->flags & VLIB_BUFFER_IS_TRACED))
+ continue;
+ tc =
+ tcp_half_open_connection_get (vnet_buffer (b)->tcp.connection_index);
+ t = vlib_add_trace (vm, node, b, sizeof (*t));
+ tcp_set_rx_trace_data (t, tc, tcp_buffer_hdr (b), b, 1);
+ }
+}
+
always_inline void
tcp_check_tx_offload (tcp_connection_t * tc, int is_ipv4)
{
}
always_inline uword
-tcp46_syn_sent_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, int is_ip4)
+tcp46_syn_sent_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, int is_ip4)
{
- u32 n_left_from, *from, *first_buffer, errors = 0;
- u32 my_thread_index = vm->thread_index;
- tcp_worker_ctx_t *wrk = tcp_get_worker (my_thread_index);
+ u32 n_left_from, *from, thread_index = vm->thread_index, errors = 0;
+ tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
- from = first_buffer = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ tcp46_syn_sent_trace_frame (vm, node, from, n_left_from);
+
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ b = bufs;
while (n_left_from > 0)
{
- u32 bi0, ack0, seq0, error0 = TCP_ERROR_NONE;
- tcp_connection_t *tc0, *new_tc0;
- tcp_header_t *tcp0 = 0;
- tcp_rx_trace_t *t0;
- vlib_buffer_t *b0;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
+ u32 ack, seq, error = TCP_ERROR_NONE;
+ tcp_connection_t *tc, *new_tc;
+ tcp_header_t *tcp;
- b0 = vlib_get_buffer (vm, bi0);
- tc0 =
- tcp_half_open_connection_get (vnet_buffer (b0)->tcp.connection_index);
- if (PREDICT_FALSE (tc0 == 0))
+ tc = tcp_half_open_connection_get (
+ vnet_buffer (b[0])->tcp.connection_index);
+ if (PREDICT_FALSE (tc == 0))
{
- error0 = TCP_ERROR_INVALID_CONNECTION;
+ error = TCP_ERROR_INVALID_CONNECTION;
goto drop;
}
/* Half-open completed or cancelled recently but the connection
* was't removed yet by the owning thread */
- if (PREDICT_FALSE (tc0->flags & TCP_CONN_HALF_OPEN_DONE))
+ if (PREDICT_FALSE (tc->flags & TCP_CONN_HALF_OPEN_DONE))
{
- error0 = TCP_ERROR_SPURIOUS_SYN_ACK;
+ error = TCP_ERROR_SPURIOUS_SYN_ACK;
goto drop;
}
- ack0 = vnet_buffer (b0)->tcp.ack_number;
- seq0 = vnet_buffer (b0)->tcp.seq_number;
- tcp0 = tcp_buffer_hdr (b0);
+ ack = vnet_buffer (b[0])->tcp.ack_number;
+ seq = vnet_buffer (b[0])->tcp.seq_number;
+ tcp = tcp_buffer_hdr (b[0]);
/* Crude check to see if the connection handle does not match
* the packet. Probably connection just switched to established */
- if (PREDICT_FALSE (tcp0->dst_port != tc0->c_lcl_port
- || tcp0->src_port != tc0->c_rmt_port))
+ if (PREDICT_FALSE (tcp->dst_port != tc->c_lcl_port ||
+ tcp->src_port != tc->c_rmt_port))
{
- error0 = TCP_ERROR_INVALID_CONNECTION;
+ error = TCP_ERROR_INVALID_CONNECTION;
goto drop;
}
- if (PREDICT_FALSE (!tcp_ack (tcp0) && !tcp_rst (tcp0)
- && !tcp_syn (tcp0)))
+ if (PREDICT_FALSE (!tcp_ack (tcp) && !tcp_rst (tcp) && !tcp_syn (tcp)))
{
- error0 = TCP_ERROR_SEGMENT_INVALID;
+ error = TCP_ERROR_SEGMENT_INVALID;
goto drop;
}
/* SYNs consume sequence numbers */
- vnet_buffer (b0)->tcp.seq_end += tcp_is_syn (tcp0);
+ vnet_buffer (b[0])->tcp.seq_end += tcp_is_syn (tcp);
/*
* 1. check the ACK bit
* and discard the segment. Return.
* If SND.UNA =< SEG.ACK =< SND.NXT then the ACK is acceptable.
*/
- if (tcp_ack (tcp0))
+ if (tcp_ack (tcp))
{
- if (seq_leq (ack0, tc0->iss) || seq_gt (ack0, tc0->snd_nxt))
+ if (seq_leq (ack, tc->iss) || seq_gt (ack, tc->snd_nxt))
{
- if (!tcp_rst (tcp0))
- tcp_send_reset_w_pkt (tc0, b0, my_thread_index, is_ip4);
- error0 = TCP_ERROR_RCV_WND;
+ if (!tcp_rst (tcp))
+ tcp_send_reset_w_pkt (tc, b[0], thread_index, is_ip4);
+ error = TCP_ERROR_RCV_WND;
goto drop;
}
/* Make sure ACK is valid */
- if (seq_gt (tc0->snd_una, ack0))
+ if (seq_gt (tc->snd_una, ack))
{
- error0 = TCP_ERROR_ACK_INVALID;
+ error = TCP_ERROR_ACK_INVALID;
goto drop;
}
}
* 2. check the RST bit
*/
- if (tcp_rst (tcp0))
+ if (tcp_rst (tcp))
{
/* If ACK is acceptable, signal client that peer is not
* willing to accept connection and drop connection*/
- if (tcp_ack (tcp0))
- tcp_rcv_rst (wrk, tc0);
- error0 = TCP_ERROR_RST_RCVD;
+ if (tcp_ack (tcp))
+ tcp_rcv_rst (wrk, tc);
+ error = TCP_ERROR_RST_RCVD;
goto drop;
}
*/
/* No SYN flag. Drop. */
- if (!tcp_syn (tcp0))
+ if (!tcp_syn (tcp))
{
- error0 = TCP_ERROR_SEGMENT_INVALID;
+ error = TCP_ERROR_SEGMENT_INVALID;
goto drop;
}
/* Parse options */
- if (tcp_options_parse (tcp0, &tc0->rcv_opts, 1))
+ if (tcp_options_parse (tcp, &tc->rcv_opts, 1))
{
- error0 = TCP_ERROR_OPTIONS;
+ error = TCP_ERROR_OPTIONS;
goto drop;
}
/* Valid SYN or SYN-ACK. Move connection from half-open pool to
* current thread pool. */
- new_tc0 = tcp_connection_alloc_w_base (my_thread_index, tc0);
- new_tc0->rcv_nxt = vnet_buffer (b0)->tcp.seq_end;
- new_tc0->irs = seq0;
- new_tc0->timers[TCP_TIMER_RETRANSMIT_SYN] = TCP_TIMER_HANDLE_INVALID;
- new_tc0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ new_tc = tcp_connection_alloc_w_base (thread_index, tc);
+ new_tc->rcv_nxt = vnet_buffer (b[0])->tcp.seq_end;
+ new_tc->irs = seq;
+ new_tc->timers[TCP_TIMER_RETRANSMIT_SYN] = TCP_TIMER_HANDLE_INVALID;
+ new_tc->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
- if (tcp_opts_tstamp (&new_tc0->rcv_opts))
+ if (tcp_opts_tstamp (&new_tc->rcv_opts))
{
- new_tc0->tsval_recent = new_tc0->rcv_opts.tsval;
- new_tc0->tsval_recent_age = tcp_time_tstamp (my_thread_index);
+ new_tc->tsval_recent = new_tc->rcv_opts.tsval;
+ new_tc->tsval_recent_age = tcp_time_tstamp (thread_index);
}
- if (tcp_opts_wscale (&new_tc0->rcv_opts))
- new_tc0->snd_wscale = new_tc0->rcv_opts.wscale;
+ if (tcp_opts_wscale (&new_tc->rcv_opts))
+ new_tc->snd_wscale = new_tc->rcv_opts.wscale;
else
- new_tc0->rcv_wscale = 0;
+ new_tc->rcv_wscale = 0;
- new_tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
- << new_tc0->snd_wscale;
- new_tc0->snd_wl1 = seq0;
- new_tc0->snd_wl2 = ack0;
+ new_tc->snd_wnd = clib_net_to_host_u16 (tcp->window)
+ << new_tc->snd_wscale;
+ new_tc->snd_wl1 = seq;
+ new_tc->snd_wl2 = ack;
- tcp_connection_init_vars (new_tc0);
+ tcp_connection_init_vars (new_tc);
/* SYN-ACK: See if we can switch to ESTABLISHED state */
- if (PREDICT_TRUE (tcp_ack (tcp0)))
+ if (PREDICT_TRUE (tcp_ack (tcp)))
{
/* Our SYN is ACKed: we have iss < ack = snd_una */
/* TODO Dequeue acknowledged segments if we support Fast Open */
- new_tc0->snd_una = ack0;
- new_tc0->state = TCP_STATE_ESTABLISHED;
+ new_tc->snd_una = ack;
+ new_tc->state = TCP_STATE_ESTABLISHED;
/* Make sure las is initialized for the wnd computation */
- new_tc0->rcv_las = new_tc0->rcv_nxt;
+ new_tc->rcv_las = new_tc->rcv_nxt;
/* Notify app that we have connection. If session layer can't
* allocate session send reset */
- if (session_stream_connect_notify (&new_tc0->connection,
+ if (session_stream_connect_notify (&new_tc->connection,
SESSION_E_NONE))
{
- tcp_send_reset_w_pkt (new_tc0, b0, my_thread_index, is_ip4);
- tcp_connection_cleanup (new_tc0);
- error0 = TCP_ERROR_CREATE_SESSION_FAIL;
+ tcp_send_reset_w_pkt (new_tc, b[0], thread_index, is_ip4);
+ tcp_connection_cleanup (new_tc);
+ error = TCP_ERROR_CREATE_SESSION_FAIL;
goto cleanup_ho;
}
- transport_fifos_init_ooo (&new_tc0->connection);
- new_tc0->tx_fifo_size =
- transport_tx_fifo_size (&new_tc0->connection);
+ transport_fifos_init_ooo (&new_tc->connection);
+ new_tc->tx_fifo_size = transport_tx_fifo_size (&new_tc->connection);
/* Update rtt with the syn-ack sample */
- tcp_estimate_initial_rtt (new_tc0);
- TCP_EVT (TCP_EVT_SYNACK_RCVD, new_tc0);
- error0 = TCP_ERROR_SYN_ACKS_RCVD;
+ tcp_estimate_initial_rtt (new_tc);
+ TCP_EVT (TCP_EVT_SYNACK_RCVD, new_tc);
+ error = TCP_ERROR_SYN_ACKS_RCVD;
}
/* SYN: Simultaneous open. Change state to SYN-RCVD and send SYN-ACK */
else
{
- new_tc0->state = TCP_STATE_SYN_RCVD;
+ new_tc->state = TCP_STATE_SYN_RCVD;
/* Notify app that we have connection */
- if (session_stream_connect_notify (&new_tc0->connection,
+ if (session_stream_connect_notify (&new_tc->connection,
SESSION_E_NONE))
{
- tcp_connection_cleanup (new_tc0);
- tcp_send_reset_w_pkt (tc0, b0, my_thread_index, is_ip4);
- TCP_EVT (TCP_EVT_RST_SENT, tc0);
- error0 = TCP_ERROR_CREATE_SESSION_FAIL;
+ tcp_connection_cleanup (new_tc);
+ tcp_send_reset_w_pkt (tc, b[0], thread_index, is_ip4);
+ TCP_EVT (TCP_EVT_RST_SENT, tc);
+ error = TCP_ERROR_CREATE_SESSION_FAIL;
goto cleanup_ho;
}
- transport_fifos_init_ooo (&new_tc0->connection);
- new_tc0->tx_fifo_size =
- transport_tx_fifo_size (&new_tc0->connection);
- new_tc0->rtt_ts = 0;
- tcp_init_snd_vars (new_tc0);
- tcp_send_synack (new_tc0);
- error0 = TCP_ERROR_SYNS_RCVD;
+ transport_fifos_init_ooo (&new_tc->connection);
+ new_tc->tx_fifo_size = transport_tx_fifo_size (&new_tc->connection);
+ new_tc->rtt_ts = 0;
+ tcp_init_snd_vars (new_tc);
+ tcp_send_synack (new_tc);
+ error = TCP_ERROR_SYNS_RCVD;
goto cleanup_ho;
}
- if (!(new_tc0->cfg_flags & TCP_CFG_F_NO_TSO))
- tcp_check_tx_offload (new_tc0, is_ip4);
+ if (!(new_tc->cfg_flags & TCP_CFG_F_NO_TSO))
+ tcp_check_tx_offload (new_tc, is_ip4);
/* Read data, if any */
- if (PREDICT_FALSE (vnet_buffer (b0)->tcp.data_len))
+ if (PREDICT_FALSE (vnet_buffer (b[0])->tcp.data_len))
{
clib_warning ("rcvd data in syn-sent");
- error0 = tcp_segment_rcv (wrk, new_tc0, b0);
- if (error0 == TCP_ERROR_ACK_OK)
- error0 = TCP_ERROR_SYN_ACKS_RCVD;
+ error = tcp_segment_rcv (wrk, new_tc, b[0]);
+ if (error == TCP_ERROR_ACK_OK)
+ error = TCP_ERROR_SYN_ACKS_RCVD;
}
else
{
/* Send ack now instead of programming it because connection was
* just established and it's not optional. */
- tcp_send_ack (new_tc0);
+ tcp_send_ack (new_tc);
}
cleanup_ho:
/* If this is not the owning thread, wait for syn retransmit to
* expire and cleanup then */
- if (tcp_half_open_connection_cleanup (tc0))
- tc0->flags |= TCP_CONN_HALF_OPEN_DONE;
+ if (tcp_half_open_connection_cleanup (tc))
+ tc->flags |= TCP_CONN_HALF_OPEN_DONE;
drop:
- tcp_inc_counter (syn_sent, error0, 1);
- if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED) && tcp0 != 0))
- {
- t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- clib_memcpy_fast (&t0->tcp_header, tcp0, sizeof (t0->tcp_header));
- clib_memcpy_fast (&t0->tcp_connection, tc0,
- sizeof (t0->tcp_connection));
- }
+ b += 1;
+ n_left_from -= 1;
+ tcp_inc_counter (syn_sent, error, 1);
}
- errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_TCP,
- my_thread_index);
+ errors =
+ session_main_flush_enqueue_events (TRANSPORT_PROTO_TCP, thread_index);
tcp_inc_counter (syn_sent, TCP_ERROR_MSG_QUEUE_FULL, errors);
- vlib_buffer_free (vm, first_buffer, from_frame->n_vectors);
+ vlib_buffer_free (vm, from, frame->n_vectors);
tcp_handle_disconnects (wrk);
- return from_frame->n_vectors;
+ return frame->n_vectors;
}
VLIB_NODE_FN (tcp4_syn_sent_node) (vlib_main_t * vm,
};
/* *INDENT-ON* */
+static void
+tcp46_listen_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ u32 *to_next, u32 n_bufs)
+{
+ tcp_connection_t *tc = 0;
+ tcp_rx_trace_t *t;
+ vlib_buffer_t *b;
+ int i;
+
+ for (i = 0; i < n_bufs; i++)
+ {
+ b = vlib_get_buffer (vm, to_next[i]);
+ if (!(b->flags & VLIB_BUFFER_IS_TRACED))
+ continue;
+ if (vnet_buffer (b)->tcp.flags == TCP_STATE_LISTEN)
+ tc = tcp_listener_get (vnet_buffer (b)->tcp.connection_index);
+ t = vlib_add_trace (vm, node, b, sizeof (*t));
+ tcp_set_rx_trace_data (t, tc, tcp_buffer_hdr (b), b, 1);
+ }
+}
+
/**
* LISTEN state processing as per RFC 793 p. 65
*/
always_inline uword
-tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, int is_ip4)
+tcp46_listen_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, int is_ip4)
{
- u32 n_left_from, *from, n_syns = 0, *first_buffer;
+ u32 n_left_from, *from, n_syns = 0;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u32 thread_index = vm->thread_index;
- from = first_buffer = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ tcp46_listen_trace_frame (vm, node, from, n_left_from);
+
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ b = bufs;
while (n_left_from > 0)
{
- u32 bi, error = TCP_ERROR_NONE;
+ u32 error = TCP_ERROR_NONE;
tcp_connection_t *lc, *child;
- vlib_buffer_t *b;
-
- bi = from[0];
- from += 1;
- n_left_from -= 1;
-
- b = vlib_get_buffer (vm, bi);
/* Flags initialized with connection state after lookup */
- if (vnet_buffer (b)->tcp.flags == TCP_STATE_LISTEN)
+ if (vnet_buffer (b[0])->tcp.flags == TCP_STATE_LISTEN)
{
- lc = tcp_listener_get (vnet_buffer (b)->tcp.connection_index);
+ lc = tcp_listener_get (vnet_buffer (b[0])->tcp.connection_index);
}
else
{
tcp_connection_t *tc;
- tc = tcp_connection_get (vnet_buffer (b)->tcp.connection_index,
+ tc = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
thread_index);
if (tc->state != TCP_STATE_TIME_WAIT)
{
- lc = 0;
error = TCP_ERROR_CREATE_EXISTS;
goto done;
}
- lc = tcp_lookup_listener (b, tc->c_fib_index, is_ip4);
+ lc = tcp_lookup_listener (b[0], tc->c_fib_index, is_ip4);
/* clean up the old session */
tcp_connection_del (tc);
/* listener was cleaned up */
}
/* Make sure connection wasn't just created */
- child = tcp_lookup_connection (lc->c_fib_index, b, thread_index,
- is_ip4);
+ child =
+ tcp_lookup_connection (lc->c_fib_index, b[0], thread_index, is_ip4);
if (PREDICT_FALSE (child->state != TCP_STATE_LISTEN))
{
error = TCP_ERROR_CREATE_EXISTS;
/* Create child session. For syn-flood protection use filter */
- /* 1. first check for an RST: handled in dispatch */
- /* if (tcp_rst (th0))
- goto drop;
- */
+ /* 1. first check for an RST: handled by input dispatch */
- /* 2. second check for an ACK: handled in dispatch */
- /* if (tcp_ack (th0))
- {
- tcp_send_reset (b0, is_ip4);
- goto drop;
- }
- */
+ /* 2. second check for an ACK: handled by input dispatch */
/* 3. check for a SYN (did that already) */
/* Create child session and send SYN-ACK */
child = tcp_connection_alloc (thread_index);
- if (tcp_options_parse (tcp_buffer_hdr (b), &child->rcv_opts, 1))
+ if (tcp_options_parse (tcp_buffer_hdr (b[0]), &child->rcv_opts, 1))
{
error = TCP_ERROR_OPTIONS;
tcp_connection_free (child);
goto done;
}
- tcp_init_w_buffer (child, b, is_ip4);
+ tcp_init_w_buffer (child, b[0], is_ip4);
child->state = TCP_STATE_SYN_RCVD;
child->c_fib_index = lc->c_fib_index;
done:
- if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
- {
- tcp_rx_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
- tcp_set_rx_trace_data (t, lc, tcp_buffer_hdr (b), b, is_ip4);
- }
-
+ b += 1;
+ n_left_from -= 1;
n_syns += (error == TCP_ERROR_NONE);
}
tcp_inc_counter (listen, TCP_ERROR_SYNS_RCVD, n_syns);
- vlib_buffer_free (vm, first_buffer, from_frame->n_vectors);
+ vlib_buffer_free (vm, from, frame->n_vectors);
- return from_frame->n_vectors;
+ return frame->n_vectors;
}
VLIB_NODE_FN (tcp4_listen_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
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