{
ASSERT (timestamp_leq (tc->tsval_recent, tc->rcv_opts.tsval));
tc->tsval_recent = tc->rcv_opts.tsval;
- tc->tsval_recent_age = tcp_time_now_w_thread (tc->c_thread_index);
+ tc->tsval_recent_age = tcp_time_tstamp (tc->c_thread_index);
}
}
tcp_connection_cleanup (tc);
break;
case TCP_STATE_SYN_SENT:
- session_stream_connect_notify (&tc->connection, 1 /* fail */ );
+ session_stream_connect_notify (&tc->connection, SESSION_E_REFUSED);
tcp_connection_cleanup (tc);
break;
case TCP_STATE_ESTABLISHED:
break;
case TCP_STATE_SYN_SENT:
/* Do not program ntf because the connection is half-open */
+ tc->rst_state = tc->state;
tcp_handle_rst (tc);
break;
case TCP_STATE_ESTABLISHED:
/* If it just so happens that a segment updates tsval_recent for a
* segment over 24 days old, invalidate tsval_recent. */
if (timestamp_lt (tc0->tsval_recent_age + TCP_PAWS_IDLE,
- tcp_time_now_w_thread (tc0->c_thread_index)))
+ tcp_time_tstamp (tc0->c_thread_index)))
{
tc0->tsval_recent = tc0->rcv_opts.tsval;
clib_warning ("paws failed: 24-day old segment");
if (!(seq_leq (tc->snd_una, vnet_buffer (b)->tcp.ack_number)
&& seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)))
{
- if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_una_max)
+ if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)
&& seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
{
tc->snd_nxt = vnet_buffer (b)->tcp.ack_number;
/**
* Compute smoothed RTT as per VJ's '88 SIGCOMM and RFC6298
*
- * Note that although the original article, srtt and rttvar are scaled
+ * Note that although in the original article srtt and rttvar are scaled
* to minimize round-off errors, here we don't. Instead, we rely on
* better precision time measurements.
*
- * TODO support us rtt resolution
+ * A known limitation of the algorithm is that a drop in rtt results in a
+ * rttvar increase and bigger RTO.
+ *
+ * mrtt must be provided in @ref TCP_TICK multiples, i.e., in us. Note that
+ * timestamps are measured as ms ticks so they must be converted before
+ * calling this function.
*/
static void
tcp_estimate_rtt (tcp_connection_t * tc, u32 mrtt)
{
int err, diff;
- if (tc->srtt != 0)
- {
- err = mrtt - tc->srtt;
+ err = mrtt - tc->srtt;
+ tc->srtt = clib_max ((int) tc->srtt + (err >> 3), 1);
+ diff = (clib_abs (err) - (int) tc->rttvar) >> 2;
+ tc->rttvar = clib_max ((int) tc->rttvar + diff, 1);
+}
- /* XXX Drop in RTT results in RTTVAR increase and bigger RTO.
- * The increase should be bound */
- tc->srtt = clib_max ((int) tc->srtt + (err >> 3), 1);
- diff = (clib_abs (err) - (int) tc->rttvar) >> 2;
- tc->rttvar = clib_max ((int) tc->rttvar + diff, 1);
- }
- else
- {
- /* First measurement. */
- tc->srtt = mrtt;
- tc->rttvar = mrtt >> 1;
- }
+static inline void
+tcp_estimate_rtt_us (tcp_connection_t * tc, f64 mrtt)
+{
+ tc->mrtt_us = tc->mrtt_us + (mrtt - tc->mrtt_us) * 0.125;
}
/**
- * Update RTT estimate and RTO timer
+ * Update rtt estimate
*
- * Measure RTT: We have two sources of RTT measurements: TSOPT and ACK
- * timing. Middle boxes are known to fiddle with TCP options so we
- * should give higher priority to ACK timing.
+ * We have potentially three sources of rtt measurements:
*
- * This should be called only if previously sent bytes have been acked.
+ * TSOPT difference between current and echoed timestamp. It has ms
+ * precision and can be computed per ack
+ * ACK timing one sequence number is tracked per rtt with us (micro second)
+ * precision.
+ * rate sample if enabled, all outstanding bytes are tracked with us
+ * precision. Every ack and sack are a rtt sample
*
- * return 1 if valid rtt 0 otherwise
+ * Middle boxes are known to fiddle with TCP options so we give higher
+ * priority to ACK timing.
+ *
+ * For now, rate sample rtts are only used under congestion.
*/
static int
tcp_update_rtt (tcp_connection_t * tc, tcp_rate_sample_t * rs, u32 ack)
if (tcp_in_cong_recovery (tc))
{
/* Accept rtt estimates for samples that have not been retransmitted */
- if ((tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
- && !(rs->flags & TCP_BTS_IS_RXT))
- {
- mrtt = rs->rtt_time * THZ;
- goto estimate_rtt;
- }
- goto done;
+ if (!(tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
+ || (rs->flags & TCP_BTS_IS_RXT))
+ goto done;
+ if (rs->rtt_time)
+ tcp_estimate_rtt_us (tc, rs->rtt_time);
+ mrtt = rs->rtt_time * THZ;
+ goto estimate_rtt;
}
if (tc->rtt_ts && seq_geq (ack, tc->rtt_seq))
{
f64 sample = tcp_time_now_us (tc->c_thread_index) - tc->rtt_ts;
- tc->mrtt_us = tc->mrtt_us + (sample - tc->mrtt_us) * 0.125;
+ tcp_estimate_rtt_us (tc, sample);
mrtt = clib_max ((u32) (sample * THZ), 1);
/* Allow measuring of a new RTT */
tc->rtt_ts = 0;
* 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_tstamp (tc);
- mrtt = clib_max (now - tc->rcv_opts.tsecr, 1);
+ mrtt = clib_max (tcp_tstamp (tc) - tc->rcv_opts.tsecr, 1);
+ mrtt *= TCP_TSTP_TO_HZ;
}
estimate_rtt:
}
else
{
- mrtt = tcp_time_now_w_thread (thread_index) - tc->rcv_opts.tsecr;
- mrtt = clib_max (mrtt, 1);
+ mrtt = tcp_tstamp (tc) - tc->rcv_opts.tsecr;
+ mrtt = clib_max (mrtt, 1) * TCP_TSTP_TO_HZ;
/* Due to retransmits we don't know the initial mrtt */
if (tc->rto_boff && mrtt > 1 * THZ)
mrtt = 1 * THZ;
}
if (mrtt > 0 && mrtt < TCP_RTT_MAX)
- tcp_estimate_rtt (tc, mrtt);
+ {
+ /* First measurement as per RFC 6298 */
+ tc->srtt = mrtt;
+ tc->rttvar = mrtt >> 1;
+ }
tcp_update_rto (tc);
}
/* Dequeue the newly ACKed bytes */
session_tx_fifo_dequeue_drop (&tc->connection, tc->burst_acked);
- tcp_validate_txf_size (tc, tc->snd_una_max - tc->snd_una);
-
- if (PREDICT_FALSE (tc->flags & TCP_CONN_PSH_PENDING))
- {
- if (seq_leq (tc->psh_seq, tc->snd_una))
- tc->flags &= ~TCP_CONN_PSH_PENDING;
- }
+ tcp_validate_txf_size (tc, tc->snd_nxt - tc->snd_una);
if (tcp_is_descheduled (tc))
tcp_reschedule (tc);
* three segments that have left the network and should've been
* buffered at the receiver XXX */
if (!tcp_opts_sack_permitted (&tc->rcv_opts))
- tc->cwnd += 3 * tc->snd_mss;
+ tc->cwnd += TCP_DUPACK_THRESHOLD * tc->snd_mss;
tc->fr_occurences += 1;
TCP_EVT (TCP_EVT_CC_EVT, tc, 4);
return (tcp_cc_is_spurious_timeout_rxt (tc));
}
-static inline u8
-tcp_should_fastrecover_sack (tcp_connection_t * tc)
-{
- return (tc->sack_sb.lost_bytes
- || ((TCP_DUPACK_THRESHOLD - 1) * tc->snd_mss
- < tc->sack_sb.sacked_bytes));
-}
-
static inline u8
tcp_should_fastrecover (tcp_connection_t * tc, u8 has_sack)
{
return 0;
}
}
- return ((tc->rcv_dupacks == TCP_DUPACK_THRESHOLD)
- || tcp_should_fastrecover_sack (tc));
+ return tc->sack_sb.lost_bytes || tc->rcv_dupacks >= tc->sack_sb.reorder;
}
static int
{
/* We've probably entered recovery and the peer still has some
* of the data we've sent. Update snd_nxt and accept the ack */
- if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_una_max)
+ if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)
&& seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
{
tc->snd_nxt = vnet_buffer (b)->tcp.ack_number;
if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
tcp_bt_sample_delivery_rate (tc, &rs);
- if (tc->bytes_acked)
+ if (tc->bytes_acked + tc->sack_sb.last_sacked_bytes)
{
- tcp_program_dequeue (wrk, tc);
tcp_update_rtt (tc, &rs, vnet_buffer (b)->tcp.ack_number);
+ if (tc->bytes_acked)
+ tcp_program_dequeue (wrk, tc);
}
TCP_EVT (TCP_EVT_ACK_RCVD, tc);
}
/* Update SACK list if need be */
- if (tcp_opts_sack_permitted (&tc->rcv_opts))
+ if (tcp_opts_sack_permitted (&tc->rcv_opts) && vec_len (tc->snd_sacks))
{
/* Remove SACK blocks that have been delivered */
tcp_update_sack_list (tc, tc->rcv_nxt, tc->rcv_nxt);
return TCP_ERROR_ENQUEUED_OOO;
}
-/**
- * Check if ACK could be delayed. If ack can be delayed, it should return
- * true for a full frame. If we're always acking return 0.
- */
-always_inline int
-tcp_can_delack (tcp_connection_t * tc)
-{
- /* Send ack if ... */
- if (TCP_ALWAYS_ACK
- /* just sent a rcv wnd 0
- || (tc->flags & TCP_CONN_SENT_RCV_WND0) != 0 */
- /* constrained to send ack */
- || (tc->flags & TCP_CONN_SNDACK) != 0
- /* we're almost out of tx wnd */
- || tcp_available_cc_snd_space (tc) < 4 * tc->snd_mss)
- return 0;
-
- return 1;
-}
-
static int
tcp_buffer_discard_bytes (vlib_buffer_t * b, u32 n_bytes_to_drop)
{
ASSERT (n_data_bytes);
tc->data_segs_in += 1;
+ /* Make sure we don't consume trailing bytes */
+ if (PREDICT_FALSE (b->current_length > n_data_bytes))
+ b->current_length = n_data_bytes;
+
/* Handle out-of-order data */
if (PREDICT_FALSE (vnet_buffer (b)->tcp.seq_number != tc->rcv_nxt))
{
/* In order data, enqueue. Fifo figures out by itself if any out-of-order
* segments can be enqueued after fifo tail offset changes. */
error = tcp_session_enqueue_data (tc, b, n_data_bytes);
- if (tcp_can_delack (tc))
- {
- if (!tcp_timer_is_active (tc, TCP_TIMER_DELACK))
- tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_DELACK,
- tcp_cfg.delack_time);
- goto done;
- }
-
tcp_program_ack (tc);
done:
{
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;
+ tc = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
+ thread_index);
- b0 = vlib_get_buffer (vm, bi0);
- tc0 = tcp_connection_get (vnet_buffer (b0)->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)
{
return;
hw_if = vnet_get_sup_hw_interface (vnm, sw_if_idx);
- if (hw_if->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
+ if (hw_if->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO)
tc->cfg_flags |= TCP_CFG_F_TSO;
}
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;
+ u32 ack, seq, error = TCP_ERROR_NONE;
+ tcp_connection_t *tc, *new_tc;
+ tcp_header_t *tcp;
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- 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 recently but the connection was't removed
- * yet by the owning thread */
- if (PREDICT_FALSE (tc0->flags & TCP_CONN_HALF_OPEN_DONE))
+ /* Half-open completed or cancelled recently but the connection
+ * was't removed yet by the owning thread */
+ if (PREDICT_FALSE (tc->flags & TCP_CONN_HALF_OPEN_DONE))
{
- /* Make sure the connection actually exists */
- ASSERT (tcp_lookup_connection (tc0->c_fib_index, b0,
- my_thread_index, is_ip4));
- 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_now ();
+ 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;
}
- 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;
}
- 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_rcv_process_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ u32 *from, u32 n_bufs)
+{
+ u32 thread_index = vm->thread_index;
+ 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_connection_get (vnet_buffer (b)->tcp.connection_index,
+ thread_index);
+ t = vlib_add_trace (vm, node, b, sizeof (*t));
+ tcp_set_rx_trace_data (t, tc, tcp_buffer_hdr (b), b, 1);
+ }
+}
+
/**
* Handles reception for all states except LISTEN, SYN-SENT and ESTABLISHED
* as per RFC793 p. 64
*/
always_inline uword
-tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, int is_ip4)
+tcp46_rcv_process_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, int is_ip4)
{
- u32 thread_index = vm->thread_index, errors = 0, *first_buffer;
+ u32 thread_index = vm->thread_index, errors, n_left_from, *from, max_deq;
tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
- u32 n_left_from, *from, max_dequeue;
+ 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_rcv_process_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, error0 = TCP_ERROR_NONE;
- tcp_header_t *tcp0 = 0;
- tcp_connection_t *tc0;
- vlib_buffer_t *b0;
- u8 is_fin0;
+ u32 error = TCP_ERROR_NONE;
+ tcp_header_t *tcp = 0;
+ tcp_connection_t *tc;
+ u8 is_fin;
- 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);
- if (PREDICT_FALSE (tc0 == 0))
+ tc = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
+ thread_index);
+ if (PREDICT_FALSE (tc == 0))
{
- error0 = TCP_ERROR_INVALID_CONNECTION;
+ error = TCP_ERROR_INVALID_CONNECTION;
goto drop;
}
- tcp0 = tcp_buffer_hdr (b0);
- is_fin0 = tcp_is_fin (tcp0);
+ tcp = tcp_buffer_hdr (b[0]);
+ is_fin = tcp_is_fin (tcp);
if (CLIB_DEBUG)
{
- if (!(tc0->connection.flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
+ if (!(tc->connection.flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
{
tcp_connection_t *tmp;
- tmp = tcp_lookup_connection (tc0->c_fib_index, b0, thread_index,
+ tmp = tcp_lookup_connection (tc->c_fib_index, b[0], thread_index,
is_ip4);
- if (tmp->state != tc0->state)
+ if (tmp->state != tc->state)
{
- if (tc0->state != TCP_STATE_CLOSED)
+ if (tc->state != TCP_STATE_CLOSED)
clib_warning ("state changed");
goto drop;
}
/*
* Special treatment for CLOSED
*/
- if (PREDICT_FALSE (tc0->state == TCP_STATE_CLOSED))
+ if (PREDICT_FALSE (tc->state == TCP_STATE_CLOSED))
{
- error0 = TCP_ERROR_CONNECTION_CLOSED;
+ error = TCP_ERROR_CONNECTION_CLOSED;
goto drop;
}
*/
/* 1-4: check SEQ, RST, SYN */
- if (PREDICT_FALSE (tcp_segment_validate (wrk, tc0, b0, tcp0, &error0)))
+ if (PREDICT_FALSE (tcp_segment_validate (wrk, tc, b[0], tcp, &error)))
goto drop;
/* 5: check the ACK field */
- switch (tc0->state)
+ switch (tc->state)
{
case TCP_STATE_SYN_RCVD:
/* Make sure the segment is exactly right */
- if (tc0->rcv_nxt != vnet_buffer (b0)->tcp.seq_number || is_fin0)
+ if (tc->rcv_nxt != vnet_buffer (b[0])->tcp.seq_number || is_fin)
{
- tcp_send_reset_w_pkt (tc0, b0, thread_index, is_ip4);
- error0 = TCP_ERROR_SEGMENT_INVALID;
+ tcp_send_reset_w_pkt (tc, b[0], thread_index, is_ip4);
+ error = TCP_ERROR_SEGMENT_INVALID;
goto drop;
}
* <SEQ=SEG.ACK><CTL=RST>
* and send it.
*/
- if (tcp_rcv_ack_no_cc (tc0, b0, &error0))
+ if (tcp_rcv_ack_no_cc (tc, b[0], &error))
{
- tcp_send_reset_w_pkt (tc0, b0, thread_index, is_ip4);
- error0 = TCP_ERROR_SEGMENT_INVALID;
+ tcp_send_reset_w_pkt (tc, b[0], thread_index, is_ip4);
+ error = TCP_ERROR_SEGMENT_INVALID;
goto drop;
}
/* Update rtt and rto */
- tcp_estimate_initial_rtt (tc0);
- tcp_connection_tx_pacer_update (tc0);
+ tcp_estimate_initial_rtt (tc);
+ tcp_connection_tx_pacer_update (tc);
/* Switch state to ESTABLISHED */
- tc0->state = TCP_STATE_ESTABLISHED;
- TCP_EVT (TCP_EVT_STATE_CHANGE, tc0);
+ tc->state = TCP_STATE_ESTABLISHED;
+ TCP_EVT (TCP_EVT_STATE_CHANGE, tc);
- if (!(tc0->cfg_flags & TCP_CFG_F_NO_TSO))
- tcp_check_tx_offload (tc0, is_ip4);
+ if (!(tc->cfg_flags & TCP_CFG_F_NO_TSO))
+ tcp_check_tx_offload (tc, is_ip4);
/* Initialize session variables */
- tc0->snd_una = vnet_buffer (b0)->tcp.ack_number;
- tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
- << tc0->rcv_opts.wscale;
- tc0->snd_wl1 = vnet_buffer (b0)->tcp.seq_number;
- tc0->snd_wl2 = vnet_buffer (b0)->tcp.ack_number;
+ tc->snd_una = vnet_buffer (b[0])->tcp.ack_number;
+ tc->snd_wnd = clib_net_to_host_u16 (tcp->window)
+ << tc->rcv_opts.wscale;
+ tc->snd_wl1 = vnet_buffer (b[0])->tcp.seq_number;
+ tc->snd_wl2 = vnet_buffer (b[0])->tcp.ack_number;
/* Reset SYN-ACK retransmit and SYN_RCV establish timers */
- tcp_retransmit_timer_reset (&wrk->timer_wheel, tc0);
- if (session_stream_accept_notify (&tc0->connection))
+ tcp_retransmit_timer_reset (&wrk->timer_wheel, tc);
+ if (session_stream_accept_notify (&tc->connection))
{
- error0 = TCP_ERROR_MSG_QUEUE_FULL;
- tcp_send_reset (tc0);
- session_transport_delete_notify (&tc0->connection);
- tcp_connection_cleanup (tc0);
+ error = TCP_ERROR_MSG_QUEUE_FULL;
+ tcp_send_reset (tc);
+ session_transport_delete_notify (&tc->connection);
+ tcp_connection_cleanup (tc);
goto drop;
}
- error0 = TCP_ERROR_ACK_OK;
+ error = TCP_ERROR_ACK_OK;
break;
case TCP_STATE_ESTABLISHED:
/* We can get packets in established state here because they
* were enqueued before state change */
- if (tcp_rcv_ack (wrk, tc0, b0, tcp0, &error0))
+ if (tcp_rcv_ack (wrk, tc, b[0], tcp, &error))
goto drop;
break;
/* In addition to the processing for the ESTABLISHED state, if
* our FIN is now acknowledged then enter FIN-WAIT-2 and
* continue processing in that state. */
- if (tcp_rcv_ack (wrk, tc0, b0, tcp0, &error0))
+ if (tcp_rcv_ack (wrk, tc, b[0], tcp, &error))
goto drop;
/* Still have to send the FIN */
- if (tc0->flags & TCP_CONN_FINPNDG)
+ if (tc->flags & TCP_CONN_FINPNDG)
{
/* TX fifo finally drained */
- max_dequeue = transport_max_tx_dequeue (&tc0->connection);
- if (max_dequeue <= tc0->burst_acked)
- tcp_send_fin (tc0);
+ max_deq = transport_max_tx_dequeue (&tc->connection);
+ if (max_deq <= tc->burst_acked)
+ tcp_send_fin (tc);
/* If a fin was received and data was acked extend wait */
- else if ((tc0->flags & TCP_CONN_FINRCVD) && tc0->bytes_acked)
- tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ else if ((tc->flags & TCP_CONN_FINRCVD) && tc->bytes_acked)
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.closewait_time);
}
/* If FIN is ACKed */
- else if (tc0->snd_una == tc0->snd_nxt)
+ else if (tc->snd_una == tc->snd_nxt)
{
/* Stop all retransmit timers because we have nothing more
* to send. */
- tcp_connection_timers_reset (tc0);
+ tcp_connection_timers_reset (tc);
/* We already have a FIN but didn't transition to CLOSING
* because of outstanding tx data. Close the connection. */
- if (tc0->flags & TCP_CONN_FINRCVD)
+ if (tc->flags & TCP_CONN_FINRCVD)
{
- tcp_connection_set_state (tc0, TCP_STATE_CLOSED);
- session_transport_closed_notify (&tc0->connection);
- tcp_program_cleanup (wrk, tc0);
+ tcp_connection_set_state (tc, TCP_STATE_CLOSED);
+ session_transport_closed_notify (&tc->connection);
+ tcp_program_cleanup (wrk, tc);
goto drop;
}
- tcp_connection_set_state (tc0, TCP_STATE_FIN_WAIT_2);
+ tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_2);
/* Enable waitclose because we're willing to wait for peer's
* FIN but not indefinitely. */
- tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.finwait2_time);
/* Don't try to deq the FIN acked */
- if (tc0->burst_acked > 1)
- session_tx_fifo_dequeue_drop (&tc0->connection,
- tc0->burst_acked - 1);
- tc0->burst_acked = 0;
+ if (tc->burst_acked > 1)
+ session_tx_fifo_dequeue_drop (&tc->connection,
+ tc->burst_acked - 1);
+ tc->burst_acked = 0;
}
break;
case TCP_STATE_FIN_WAIT_2:
/* In addition to the processing for the ESTABLISHED state, if
* the retransmission queue is empty, the user's CLOSE can be
* acknowledged ("ok") but do not delete the TCB. */
- if (tcp_rcv_ack_no_cc (tc0, b0, &error0))
+ if (tcp_rcv_ack_no_cc (tc, b[0], &error))
goto drop;
- tc0->burst_acked = 0;
+ tc->burst_acked = 0;
break;
case TCP_STATE_CLOSE_WAIT:
/* Do the same processing as for the ESTABLISHED state. */
- if (tcp_rcv_ack (wrk, tc0, b0, tcp0, &error0))
+ if (tcp_rcv_ack (wrk, tc, b[0], tcp, &error))
goto drop;
- if (!(tc0->flags & TCP_CONN_FINPNDG))
+ if (!(tc->flags & TCP_CONN_FINPNDG))
break;
/* Still have outstanding tx data */
- max_dequeue = transport_max_tx_dequeue (&tc0->connection);
- if (max_dequeue > tc0->burst_acked)
+ max_deq = transport_max_tx_dequeue (&tc->connection);
+ if (max_deq > tc->burst_acked)
break;
- tcp_send_fin (tc0);
- tcp_connection_timers_reset (tc0);
- tcp_connection_set_state (tc0, TCP_STATE_LAST_ACK);
- tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_send_fin (tc);
+ tcp_connection_timers_reset (tc);
+ tcp_connection_set_state (tc, TCP_STATE_LAST_ACK);
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.lastack_time);
break;
case TCP_STATE_CLOSING:
/* In addition to the processing for the ESTABLISHED state, if
* the ACK acknowledges our FIN then enter the TIME-WAIT state,
* otherwise ignore the segment. */
- if (tcp_rcv_ack_no_cc (tc0, b0, &error0))
+ if (tcp_rcv_ack_no_cc (tc, b[0], &error))
goto drop;
- if (tc0->snd_una != tc0->snd_nxt)
+ if (tc->snd_una != tc->snd_nxt)
goto drop;
- tcp_connection_timers_reset (tc0);
- tcp_connection_set_state (tc0, TCP_STATE_TIME_WAIT);
- tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_connection_timers_reset (tc);
+ tcp_connection_set_state (tc, TCP_STATE_TIME_WAIT);
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.timewait_time);
- session_transport_closed_notify (&tc0->connection);
+ session_transport_closed_notify (&tc->connection);
goto drop;
break;
* acknowledgment of our FIN. If our FIN is now acknowledged,
* delete the TCB, enter the CLOSED state, and return. */
- if (tcp_rcv_ack_no_cc (tc0, b0, &error0))
+ if (tcp_rcv_ack_no_cc (tc, b[0], &error))
goto drop;
/* Apparently our ACK for the peer's FIN was lost */
- if (is_fin0 && tc0->snd_una != tc0->snd_nxt)
+ if (is_fin && tc->snd_una != tc->snd_nxt)
{
- tcp_send_fin (tc0);
+ tcp_send_fin (tc);
goto drop;
}
- tcp_connection_set_state (tc0, TCP_STATE_CLOSED);
- session_transport_closed_notify (&tc0->connection);
+ tcp_connection_set_state (tc, TCP_STATE_CLOSED);
+ session_transport_closed_notify (&tc->connection);
/* Don't free the connection from the data path since
* we can't ensure that we have no packets already enqueued
* to output. Rely instead on the waitclose timer */
- tcp_connection_timers_reset (tc0);
- tcp_program_cleanup (tcp_get_worker (tc0->c_thread_index), tc0);
+ tcp_connection_timers_reset (tc);
+ tcp_program_cleanup (tcp_get_worker (tc->c_thread_index), tc);
goto drop;
* retransmission of the remote FIN. Acknowledge it, and restart
* the 2 MSL timeout. */
- if (tcp_rcv_ack_no_cc (tc0, b0, &error0))
+ if (tcp_rcv_ack_no_cc (tc, b[0], &error))
goto drop;
- if (!is_fin0)
+ if (!is_fin)
goto drop;
- tcp_program_ack (tc0);
- tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_program_ack (tc);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.timewait_time);
goto drop;
/* 6: check the URG bit TODO */
/* 7: process the segment text */
- switch (tc0->state)
+ switch (tc->state)
{
case TCP_STATE_ESTABLISHED:
case TCP_STATE_FIN_WAIT_1:
case TCP_STATE_FIN_WAIT_2:
- 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]);
+ /* Don't accept out of order fins lower */
+ if (vnet_buffer (b[0])->tcp.seq_end != tc->rcv_nxt)
+ goto drop;
break;
case TCP_STATE_CLOSE_WAIT:
case TCP_STATE_CLOSING:
}
/* 8: check the FIN bit */
- if (!is_fin0)
+ if (!is_fin)
goto drop;
- TCP_EVT (TCP_EVT_FIN_RCVD, tc0);
+ TCP_EVT (TCP_EVT_FIN_RCVD, tc);
- switch (tc0->state)
+ switch (tc->state)
{
case TCP_STATE_ESTABLISHED:
/* Account for the FIN and send ack */
- tc0->rcv_nxt += 1;
- tcp_program_ack (tc0);
- tcp_connection_set_state (tc0, TCP_STATE_CLOSE_WAIT);
- tcp_program_disconnect (wrk, tc0);
- tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tc->rcv_nxt += 1;
+ tcp_program_ack (tc);
+ tcp_connection_set_state (tc, TCP_STATE_CLOSE_WAIT);
+ tcp_program_disconnect (wrk, tc);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.closewait_time);
break;
case TCP_STATE_SYN_RCVD:
/* Send FIN-ACK, enter LAST-ACK and because the app was not
* notified yet, set a cleanup timer instead of relying on
* disconnect notify and the implicit close call. */
- tcp_connection_timers_reset (tc0);
- tc0->rcv_nxt += 1;
- tcp_send_fin (tc0);
- tcp_connection_set_state (tc0, TCP_STATE_LAST_ACK);
- tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_connection_timers_reset (tc);
+ tc->rcv_nxt += 1;
+ tcp_send_fin (tc);
+ tcp_connection_set_state (tc, TCP_STATE_LAST_ACK);
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.lastack_time);
break;
case TCP_STATE_CLOSE_WAIT:
/* move along .. */
break;
case TCP_STATE_FIN_WAIT_1:
- tc0->rcv_nxt += 1;
+ tc->rcv_nxt += 1;
- if (tc0->flags & TCP_CONN_FINPNDG)
+ if (tc->flags & TCP_CONN_FINPNDG)
{
/* If data is outstanding, stay in FIN_WAIT_1 and try to finish
* sending it. Since we already received a fin, do not wait
* for too long. */
- tc0->flags |= TCP_CONN_FINRCVD;
- tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tc->flags |= TCP_CONN_FINRCVD;
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.closewait_time);
}
else
{
- tcp_connection_set_state (tc0, TCP_STATE_CLOSING);
- tcp_program_ack (tc0);
+ tcp_connection_set_state (tc, TCP_STATE_CLOSING);
+ tcp_program_ack (tc);
/* Wait for ACK for our FIN but not forever */
- tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.closing_time);
}
break;
case TCP_STATE_FIN_WAIT_2:
/* Got FIN, send ACK! Be more aggressive with resource cleanup */
- tc0->rcv_nxt += 1;
- tcp_connection_set_state (tc0, TCP_STATE_TIME_WAIT);
- tcp_connection_timers_reset (tc0);
- tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tc->rcv_nxt += 1;
+ tcp_connection_set_state (tc, TCP_STATE_TIME_WAIT);
+ tcp_connection_timers_reset (tc);
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.timewait_time);
- tcp_program_ack (tc0);
- session_transport_closed_notify (&tc0->connection);
+ tcp_program_ack (tc);
+ session_transport_closed_notify (&tc->connection);
break;
case TCP_STATE_TIME_WAIT:
/* Remain in the TIME-WAIT state. Restart the time-wait
* timeout.
*/
- tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
tcp_cfg.timewait_time);
break;
}
- error0 = TCP_ERROR_FIN_RCVD;
+ error = TCP_ERROR_FIN_RCVD;
drop:
- tcp_inc_counter (rcv_process, error0, 1);
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- tcp_rx_trace_t *t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- tcp_set_rx_trace_data (t0, tc0, tcp0, b0, is_ip4);
- }
+ b += 1;
+ n_left_from -= 1;
+ tcp_inc_counter (rcv_process, error, 1);
}
errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_TCP,
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);
+ vlib_buffer_free (vm, from, frame->n_vectors);
- return from_frame->n_vectors;
+ return frame->n_vectors;
}
VLIB_NODE_FN (tcp4_rcv_process_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);
-
- lc = tcp_listener_get (vnet_buffer (b)->tcp.connection_index);
- if (PREDICT_FALSE (lc == 0))
+ /* Flags initialized with connection state after lookup */
+ if (vnet_buffer (b[0])->tcp.flags == TCP_STATE_LISTEN)
+ {
+ 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)
{
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 */
+ if (!lc)
+ {
+ error = TCP_ERROR_NO_LISTENER;
+ goto done;
+ }
}
/* 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;
tcp_connection_init_vars (child);
child->rto = TCP_RTO_MIN;
+ /*
+ * This initializes elog track, must be done before synack.
+ * We also do it before possible tcp_connection_cleanup() as it
+ * generates TCP_EVT_DELETE event.
+ */
+ TCP_EVT (TCP_EVT_SYN_RCVD, child, 1);
+
if (session_stream_accept (&child->connection, lc->c_s_index,
lc->c_thread_index, 0 /* notify */ ))
{
goto done;
}
+ transport_fifos_init_ooo (&child->connection);
child->tx_fifo_size = transport_tx_fifo_size (&child->connection);
tcp_send_synack (child);
- TCP_EVT (TCP_EVT_SYN_RCVD, child, 1);
-
done:
- if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
- {
- tcp_rx_trace_t *t;
- t = vlib_add_trace (vm, node, b, sizeof (*t));
- clib_memcpy_fast (&t->tcp_header, tcp_buffer_hdr (b),
- sizeof (t->tcp_header));
- clib_memcpy_fast (&t->tcp_connection, lc,
- sizeof (t->tcp_connection));
- }
-
+ 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,
error = tm->dispatch_table[tc->state][flags].error;
tc->segs_in += 1;
+ /* Track connection state when packet was received. It helps
+ * @ref tcp46_listen_inline detect port reuse */
+ vnet_buffer (b)->tcp.flags = tc->state;
+
if (PREDICT_FALSE (error != TCP_ERROR_NONE))
{
b->error = error_node->errors[error];
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 nexts[VLIB_FRAME_SIZE], *next;
- tcp_set_time_now (tcp_get_worker (thread_index));
+ tcp_update_time_now (tcp_get_worker (thread_index));
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
/* *INDENT-ON* */
#ifndef CLIB_MARCH_VARIANT
+void
+tcp_check_gso (tcp_connection_t *tc)
+{
+ tcp_check_tx_offload (tc, tc->c_is_ip4);
+}
+
static void
tcp_dispatch_table_init (tcp_main_t * tm)
{
_(FIN_WAIT_2, TCP_FLAG_RST, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
_(FIN_WAIT_2, TCP_FLAG_RST | TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS,
TCP_ERROR_NONE);
+ _(FIN_WAIT_2, TCP_FLAG_SYN, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
_(CLOSE_WAIT, TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
_(CLOSE_WAIT, TCP_FLAG_FIN | TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS,
TCP_ERROR_NONE);
_(CLOSE_WAIT, TCP_FLAG_RST, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
_(CLOSE_WAIT, TCP_FLAG_RST | TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS,
TCP_ERROR_NONE);
+ _(CLOSE_WAIT, TCP_FLAG_SYN, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
_(LAST_ACK, 0, TCP_INPUT_NEXT_DROP, TCP_ERROR_SEGMENT_INVALID);
_(LAST_ACK, TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
_(LAST_ACK, TCP_FLAG_FIN, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
Code Review / vpp.git / blobdiff