return wnd_scale;
}
-/**
- * Update max segment size we're able to process.
- *
- * The value is constrained by our interface's MTU and IP options. It is
- * also what we advertise to our peer.
- */
-void
-tcp_update_rcv_mss (tcp_connection_t * tc)
-{
- /* TODO find our iface MTU */
- tc->mss = tcp_cfg.default_mtu - sizeof (tcp_header_t);
-}
-
/**
* TCP's initial window
*/
*/
available_space = transport_max_rx_enqueue (&tc->connection);
if (PREDICT_FALSE (available_space < tc->rcv_opts.mss))
- available_space = 0;
+ {
+ tc->rcv_wnd = 0;
+ return;
+ }
/*
* Use the above and what we know about what we've previously advertised
if (PREDICT_FALSE ((i32) available_space < observed_wnd))
{
wnd = clib_max (observed_wnd, 0);
- TCP_EVT_DBG (TCP_EVT_RCV_WND_SHRUNK, tc, observed_wnd, available_space);
+ TCP_EVT (TCP_EVT_RCV_WND_SHRUNK, tc, observed_wnd, available_space);
}
else
{
}
static int
-tcp_make_syn_options (tcp_options_t * opts, u8 wnd_scale)
+tcp_make_syn_options (tcp_connection_t * tc, tcp_options_t * opts)
{
u8 len = 0;
opts->flags |= TCP_OPTS_FLAG_MSS;
- opts->mss = tcp_cfg.default_mtu; /*XXX discover that */
+ opts->mss = tc->mss;
len += TCP_OPTION_LEN_MSS;
opts->flags |= TCP_OPTS_FLAG_WSCALE;
- opts->wscale = wnd_scale;
+ opts->wscale = tc->rcv_wscale;
len += TCP_OPTION_LEN_WINDOW_SCALE;
opts->flags |= TCP_OPTS_FLAG_TSTAMP;
case TCP_STATE_SYN_RCVD:
return tcp_make_synack_options (tc, opts);
case TCP_STATE_SYN_SENT:
- return tcp_make_syn_options (opts, tc->rcv_wscale);
+ return tcp_make_syn_options (tc, opts);
default:
clib_warning ("State not handled! %d", state);
return 0;
tcp_cc_event (tc, TCP_CC_EVT_START_TX);
}
-void
-tcp_init_mss (tcp_connection_t * tc)
-{
- u16 default_min_mss = 536;
- tcp_update_rcv_mss (tc);
-
- /* TODO cache mss and consider PMTU discovery */
- tc->snd_mss = clib_min (tc->rcv_opts.mss, tc->mss);
-
- if (tc->snd_mss < 45)
- {
- /* Assume that at least the min default mss works */
- tc->snd_mss = default_min_mss;
- tc->rcv_opts.mss = default_min_mss;
- }
-
- /* We should have enough space for 40 bytes of options */
- ASSERT (tc->snd_mss > 45);
-
- /* If we use timestamp option, account for it */
- if (tcp_opts_tstamp (&tc->rcv_opts))
- tc->snd_mss -= TCP_OPTION_LEN_TIMESTAMP;
-}
#endif /* CLIB_MARCH_VARIANT */
static void *
tcp_make_ack (tcp_connection_t * tc, vlib_buffer_t * b)
{
tcp_make_ack_i (tc, b, TCP_STATE_ESTABLISHED, TCP_FLAG_ACK);
- TCP_EVT_DBG (TCP_EVT_ACK_SENT, tc);
+ TCP_EVT (TCP_EVT_ACK_SENT, tc);
tc->rcv_las = tc->rcv_nxt;
}
/* Make and write options */
clib_memset (&snd_opts, 0, sizeof (snd_opts));
- tcp_opts_len = tcp_make_syn_options (&snd_opts, tc->rcv_wscale);
+ tcp_opts_len = tcp_make_syn_options (tc, &snd_opts);
tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,
}
tcp_enqueue_to_ip_lookup_now (wrk, b, bi, is_ip4, fib_index);
- TCP_EVT_DBG (TCP_EVT_RST_SENT, tc);
+ TCP_EVT (TCP_EVT_RST_SENT, tc);
vlib_node_increment_counter (vm, tcp_node_index (output, tc->c_is_ip4),
TCP_ERROR_RST_SENT, 1);
}
ASSERT (opts_write_len == tc->snd_opts_len);
vnet_buffer (b)->tcp.connection_index = tc->c_c_index;
tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4);
- TCP_EVT_DBG (TCP_EVT_RST_SENT, tc);
+ TCP_EVT (TCP_EVT_RST_SENT, tc);
vlib_node_increment_counter (vm, tcp_node_index (output, tc->c_is_ip4),
TCP_ERROR_RST_SENT, 1);
}
tcp_push_ip_hdr (wrk, tc, b);
tcp_enqueue_to_ip_lookup (wrk, b, bi, tc->c_is_ip4, tc->c_fib_index);
- TCP_EVT_DBG (TCP_EVT_SYN_SENT, tc);
+ TCP_EVT (TCP_EVT_SYN_SENT, tc);
}
void
tcp_init_buffer (vm, b);
tcp_make_synack (tc, b);
tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4);
- TCP_EVT_DBG (TCP_EVT_SYNACK_SENT, tc);
+ TCP_EVT (TCP_EVT_SYNACK_SENT, tc);
}
/**
tcp_init_buffer (vm, b);
tcp_make_fin (tc, b);
tcp_enqueue_to_output_now (wrk, b, bi, tc->c_is_ip4);
- TCP_EVT_DBG (TCP_EVT_FIN_SENT, tc);
+ TCP_EVT (TCP_EVT_FIN_SENT, tc);
/* Account for the FIN */
tc->snd_nxt += 1;
if (!fin_snt)
tc->bytes_out += data_len;
tc->data_segs_out += 1;
- TCP_EVT_DBG (TCP_EVT_PKTIZE, tc);
+ TCP_EVT (TCP_EVT_PKTIZE, tc);
}
u32
}
void
-tcp_program_fastretransmit (tcp_connection_t * tc)
+tcp_program_retransmit (tcp_connection_t * tc)
{
- if (!(tc->flags & TCP_CONN_FRXT_PENDING))
+ if (!(tc->flags & TCP_CONN_RXT_PENDING))
{
session_add_self_custom_tx_evt (&tc->connection, 0);
- tc->flags |= TCP_CONN_FRXT_PENDING;
+ tc->flags |= TCP_CONN_RXT_PENDING;
}
}
}
/**
- * Send Window Update ACK,
- * ensuring that it will be sent once, if RWND became non-zero,
- * after zero RWND has been advertised in ACK before
+ * Send window update ack
+ *
+ * Ensures that it will be sent only once, after a zero rwnd has been
+ * advertised in a previous ack, and only if rwnd has grown beyond a
+ * configurable value.
*/
void
tcp_send_window_update_ack (tcp_connection_t * tc)
{
- u32 win;
-
if (tcp_zero_rwnd_sent (tc))
{
- win = tcp_window_to_advertise (tc, tc->state);
- if (win > 0)
+ tcp_update_rcv_wnd (tc);
+ if (tc->rcv_wnd >= tcp_cfg.rwnd_min_update_ack * tc->snd_mss)
{
tcp_zero_rwnd_sent_off (tc);
tcp_program_ack (tc);
if (!n_bytes)
return 0;
- if (tcp_in_fastrecovery (tc))
- {
- tc->snd_rxt_bytes += n_bytes;
- if (tc->flags & TCP_CONN_RATE_SAMPLE)
- tcp_bt_track_rxt (tc, start, start + n_bytes);
- }
+ tc->snd_rxt_bytes += n_bytes;
+
+ if (tc->flags & TCP_CONN_RATE_SAMPLE)
+ tcp_bt_track_rxt (tc, start, start + n_bytes);
tc->bytes_retrans += n_bytes;
tc->segs_retrans += 1;
- TCP_EVT_DBG (TCP_EVT_CC_RTX, tc, offset, n_bytes);
+ TCP_EVT (TCP_EVT_CC_RTX, tc, offset, n_bytes);
+
return n_bytes;
}
+static void
+tcp_check_sack_reneging (tcp_connection_t * tc)
+{
+ sack_scoreboard_t *sb = &tc->sack_sb;
+ sack_scoreboard_hole_t *hole;
+
+ hole = scoreboard_first_hole (sb);
+ if (!sb->is_reneging && (!hole || hole->start == tc->snd_una))
+ return;
+
+ scoreboard_clear_reneging (sb, tc->snd_una, tc->snd_nxt);
+}
+
/**
* Reset congestion control, switch cwnd to loss window and try again.
*/
static void
tcp_cc_init_rxt_timeout (tcp_connection_t * tc)
{
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 6);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 6);
+
tc->prev_ssthresh = tc->ssthresh;
tc->prev_cwnd = tc->cwnd;
- /* Clear fast recovery state if needed */
- if (tcp_in_fastrecovery (tc))
- tcp_cc_fastrecovery_clear (tc);
+ /* If we entrered loss without fast recovery, notify cc algo of the
+ * congestion event such that it can update ssthresh and its state */
+ if (!tcp_in_fastrecovery (tc))
+ tcp_cc_congestion (tc);
- /* Let cc algo decide loss cwnd and ssthresh */
+ /* Let cc algo decide loss cwnd and ssthresh post unrecovered loss */
tcp_cc_loss (tc);
- /* Start again from the beginning */
- tc->snd_congestion = tc->snd_nxt;
- tc->rcv_dupacks = 0;
tc->rtt_ts = 0;
tc->cwnd_acc_bytes = 0;
tc->tr_occurences += 1;
- tcp_connection_tx_pacer_reset (tc, tc->cwnd, 2 * tc->snd_mss);
tcp_recovery_on (tc);
}
if (tc->state >= TCP_STATE_ESTABLISHED)
{
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 2);
/* Lost FIN, retransmit and return */
if (tc->flags & TCP_CONN_FINSNT)
return;
}
- /* Increment RTO backoff (also equal to number of retries) and go back
- * to first un-acked byte */
- tc->rto_boff += 1;
-
- /* TODO be less aggressive about clearing scoreboard */
- scoreboard_clear (&tc->sack_sb);
-
- /* First retransmit timeout */
- if (tc->rto_boff == 1)
- {
- tcp_cc_init_rxt_timeout (tc);
- /* Record timestamp. Eifel detection algorithm RFC3522 */
- tc->snd_rxt_ts = tcp_tstamp (tc);
- }
+ if (tcp_opts_sack_permitted (&tc->rcv_opts))
+ tcp_check_sack_reneging (tc);
- if (tc->flags & TCP_CONN_RATE_SAMPLE)
- tcp_bt_flush_samples (tc);
+ /* Update send congestion to make sure that rxt has data to send */
+ tc->snd_congestion = tc->snd_nxt;
- /* If we've sent beyond snd_congestion, update it */
- tc->snd_congestion = seq_max (tc->snd_nxt, tc->snd_congestion);
- tc->snd_nxt = tc->snd_una;
-
- /* Send one segment. n_bytes may be zero due to buffer shortfall */
+ /* Send the first unacked segment. If we're short on buffers, return
+ * as soon as possible */
n_bytes = tcp_prepare_retransmit_segment (wrk, tc, 0, tc->snd_mss, &b);
if (!n_bytes)
{
tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
tcp_retransmit_timer_force_update (tc);
+
+ tc->rto_boff += 1;
+ if (tc->rto_boff == 1)
+ {
+ tcp_cc_init_rxt_timeout (tc);
+ /* Record timestamp. Eifel detection algorithm RFC3522 */
+ tc->snd_rxt_ts = tcp_tstamp (tc);
+ }
+
+ if (tcp_opts_sack_permitted (&tc->rcv_opts))
+ scoreboard_init_high_rxt (&tc->sack_sb, tc->snd_una + tc->snd_mss);
+
+ tcp_program_retransmit (tc);
}
/* Retransmit SYN-ACK */
else if (tc->state == TCP_STATE_SYN_RCVD)
{
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 2);
tc->rtt_ts = 0;
b = vlib_get_buffer (vm, bi);
tcp_init_buffer (vm, b);
tcp_make_synack (tc, b);
- TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc, 1);
+ TCP_EVT (TCP_EVT_SYN_RXT, tc, 1);
/* Retransmit timer already updated, just enqueue to output */
tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4);
return;
}
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 2);
tc->rtt_ts = 0;
/* Active open establish timeout */
tcp_init_buffer (vm, b);
tcp_make_syn (tc, b);
- TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc, 0);
+ TCP_EVT (TCP_EVT_SYN_RXT, tc, 0);
/* This goes straight to ipx_lookup */
tcp_push_ip_hdr (wrk, tc, b);
|| tc->snd_nxt == tc->snd_una_max
|| tc->rto_boff > 1));
+ if (tc->flags & TCP_CONN_RATE_SAMPLE)
+ {
+ tcp_bt_check_app_limited (tc);
+ tcp_bt_track_tx (tc);
+ }
+
tcp_push_hdr_i (tc, b, tc->snd_nxt, /* compute opts */ 0,
/* burst */ 0, /* update_snd_nxt */ 1);
tc->snd_una_max = seq_max (tc->snd_nxt, tc->snd_una_max);
vlib_buffer_t *b;
u32 bi, n_bytes;
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 1);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 1);
n_bytes = tcp_prepare_retransmit_segment (wrk, tc, 0, tc->snd_mss, &b);
if (!n_bytes)
}
static int
-tcp_fast_retransmit_unsent (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
- u32 burst_size)
+tcp_transmit_unsent (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
+ u32 burst_size)
{
u32 offset, n_segs = 0, n_written, bi, available_wnd;
vlib_main_t *vm = wrk->vm;
return n_segs;
}
+/**
+ * Estimate send space using proportional rate reduction (RFC6937)
+ */
+static int
+tcp_fastrecovery_prr_snd_space (tcp_connection_t * tc)
+{
+ u32 pipe, prr_out;
+ int space;
+
+ pipe = tcp_flight_size (tc);
+ prr_out = tc->snd_rxt_bytes + (tc->snd_nxt - tc->snd_congestion);
+
+ if (pipe > tc->ssthresh)
+ {
+ space = ((int) tc->prr_delivered * ((f64) tc->ssthresh / tc->prev_cwnd))
+ - prr_out;
+ }
+ else
+ {
+ int limit = tc->prr_delivered - prr_out + tc->snd_mss;
+ space = clib_min (tc->ssthresh - pipe, limit);
+ }
+ space = clib_max (space, prr_out ? 0 : tc->snd_mss);
+ return space;
+}
+
#define scoreboard_rescue_rxt_valid(_sb, _tc) \
(seq_geq (_sb->rescue_rxt, _tc->snd_una) \
&& seq_leq (_sb->rescue_rxt, _tc->snd_congestion))
/**
- * Do fast retransmit with SACKs
+ * Do retransmit with SACKs
*/
-int
-tcp_fast_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
- u32 burst_size)
+static int
+tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
+ u32 burst_size)
{
- u32 n_written = 0, offset, max_bytes, n_segs = 0, n_segs_now;
+ u32 n_written = 0, offset, max_bytes, n_segs = 0;
sack_scoreboard_hole_t *hole;
vlib_main_t *vm = wrk->vm;
vlib_buffer_t *b = 0;
int snd_space;
u8 snd_limited = 0, can_rescue = 0;
- ASSERT (tcp_in_fastrecovery (tc));
+ ASSERT (tcp_in_cong_recovery (tc));
+
+ if (tcp_in_recovery (tc))
+ snd_space = tcp_available_cc_snd_space (tc);
+ else
+ snd_space = tcp_fastrecovery_prr_snd_space (tc);
- snd_space = tcp_available_cc_snd_space (tc);
if (snd_space < tc->snd_mss)
{
- tcp_program_fastretransmit (tc);
+ /* We're cc constrained so don't accumulate tokens */
+ transport_connection_tx_pacer_reset_bucket (&tc->connection,
+ vm->
+ clib_time.last_cpu_time);
return 0;
}
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 0);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 0);
sb = &tc->sack_sb;
hole = scoreboard_get_hole (sb, sb->cur_rxt_hole);
&snd_limited);
if (!hole)
{
+ /* We are out of lost holes to retransmit so send some new data. */
if (max_deq)
{
+ u32 n_segs_new, av_window;
+ av_window = tc->snd_wnd - (tc->snd_nxt - tc->snd_una);
+ snd_space = clib_min (snd_space, av_window);
snd_space = clib_min (max_deq, snd_space);
burst_size = clib_min (burst_size - n_segs,
snd_space / tc->snd_mss);
- n_segs_now = tcp_fast_retransmit_unsent (wrk, tc, burst_size);
- if (max_deq > n_segs_now * tc->snd_mss)
- tcp_program_fastretransmit (tc);
- n_segs += n_segs_now;
+ burst_size = clib_min (burst_size, TCP_RXT_MAX_BURST);
+ n_segs_new = tcp_transmit_unsent (wrk, tc, burst_size);
+ if (max_deq > n_segs_new * tc->snd_mss)
+ tcp_program_retransmit (tc);
+
+ n_segs += n_segs_new;
goto done;
}
- if (!can_rescue || scoreboard_rescue_rxt_valid (sb, tc))
+ if (tcp_in_recovery (tc) || !can_rescue
+ || scoreboard_rescue_rxt_valid (sb, tc))
break;
/* If rescue rxt undefined or less than snd_una then one segment of
}
if (hole)
- tcp_program_fastretransmit (tc);
+ tcp_program_retransmit (tc);
done:
+
return n_segs;
}
/**
* Fast retransmit without SACK info
*/
-int
-tcp_fast_retransmit_no_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
- u32 burst_size)
+static int
+tcp_retransmit_no_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
+ u32 burst_size)
{
u32 n_written = 0, offset = 0, bi, max_deq, n_segs_now;
vlib_main_t *vm = wrk->vm;
vlib_buffer_t *b;
ASSERT (tcp_in_fastrecovery (tc));
- TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 0);
+ TCP_EVT (TCP_EVT_CC_EVT, tc, 0);
snd_space = tcp_available_cc_snd_space (tc);
{
snd_space = clib_min (max_deq, snd_space);
burst_size = clib_min (burst_size - n_segs, snd_space / tc->snd_mss);
- n_segs_now = tcp_fast_retransmit_unsent (wrk, tc, burst_size);
+ n_segs_now = tcp_transmit_unsent (wrk, tc, burst_size);
if (max_deq > n_segs_now * tc->snd_mss)
- tcp_program_fastretransmit (tc);
+ tcp_program_retransmit (tc);
n_segs += n_segs_now;
}
/**
* Do fast retransmit
*/
-int
-tcp_fast_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
- u32 burst_size)
+static int
+tcp_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, u32 burst_size)
{
if (tcp_opts_sack_permitted (&tc->rcv_opts))
- return tcp_fast_retransmit_sack (wrk, tc, burst_size);
+ return tcp_retransmit_sack (wrk, tc, burst_size);
else
- return tcp_fast_retransmit_no_sack (wrk, tc, burst_size);
+ return tcp_retransmit_no_sack (wrk, tc, burst_size);
}
static int
}
static int
-tcp_do_fastretransmit (tcp_connection_t * tc, u32 max_burst_size)
+tcp_do_retransmit (tcp_connection_t * tc, u32 max_burst_size)
{
u32 n_segs = 0, burst_size, sent_bytes, burst_bytes;
tcp_worker_ctx_t *wrk;
burst_size = clib_min (max_burst_size, burst_bytes / tc->snd_mss);
if (!burst_size)
{
- tcp_program_fastretransmit (tc);
+ tcp_program_retransmit (tc);
return 0;
}
- n_segs = tcp_fast_retransmit (wrk, tc, burst_size);
+ n_segs = tcp_retransmit (wrk, tc, burst_size);
sent_bytes = clib_min (n_segs * tc->snd_mss, burst_bytes);
transport_connection_tx_pacer_update_bytes (&tc->connection, sent_bytes);
return n_segs;
tcp_connection_t *tc = (tcp_connection_t *) conn;
u32 n_segs = 0;
- if (tcp_in_fastrecovery (tc) && (tc->flags & TCP_CONN_FRXT_PENDING))
+ if (tcp_in_cong_recovery (tc) && (tc->flags & TCP_CONN_RXT_PENDING))
{
- tc->flags &= ~TCP_CONN_FRXT_PENDING;
- n_segs = tcp_do_fastretransmit (tc, max_burst_size);
+ tc->flags &= ~TCP_CONN_RXT_PENDING;
+ n_segs = tcp_do_retransmit (tc, max_burst_size);
max_burst_size -= n_segs;
}
tcp_header_t *th0 = 0;
th0 = vlib_buffer_get_current (b0);
- TCP_EVT_DBG (TCP_EVT_OUTPUT, tc0, th0->flags, b0->current_length);
+ TCP_EVT (TCP_EVT_OUTPUT, tc0, th0->flags, b0->current_length);
if (is_ip4)
{
vlib_buffer_push_ip4 (vm, b0, &tc0->c_lcl_ip4, &tc0->c_rmt_ip4,
b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
vnet_buffer (b0)->l3_hdr_offset = (u8 *) ih0 - b0->data;
vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
+ b0->flags |=
+ VNET_BUFFER_F_L3_HDR_OFFSET_VALID | VNET_BUFFER_F_L4_HDR_OFFSET_VALID;
th0->checksum = 0;
}
}
+always_inline void
+tcp_check_if_gso (tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)))
+ return;
+ u16 data_len =
+ b->current_length + b->total_length_not_including_first_buffer -
+ sizeof (tcp_header_t) - tc->snd_opts_len;
+
+ if (data_len > tc->snd_mss)
+ {
+ ASSERT ((b->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID) != 0);
+ ASSERT ((b->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID) != 0);
+ b->flags |= VNET_BUFFER_F_GSO;
+ vnet_buffer2 (b)->gso_l4_hdr_sz =
+ sizeof (tcp_header_t) + tc->snd_opts_len;
+ vnet_buffer2 (b)->gso_size = tc->snd_mss;
+ }
+}
+
always_inline void
tcp_output_handle_packet (tcp_connection_t * tc0, vlib_buffer_t * b0,
vlib_node_runtime_t * error_node, u16 * next0,
*next0 = tc0->next_node_index;
vnet_buffer (b0)->tcp.next_node_opaque = tc0->next_node_opaque;
}
+ else
+ {
+ *next0 = TCP_OUTPUT_NEXT_IP_LOOKUP;
+ }
vnet_buffer (b0)->sw_if_index[VLIB_TX] = tc0->c_fib_index;
vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, STORE);
}
- next[0] = next[1] = TCP_OUTPUT_NEXT_IP_LOOKUP;
-
tc0 = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
thread_index);
tc1 = tcp_connection_get (vnet_buffer (b[1])->tcp.connection_index,
thread_index);
- tcp_output_push_ip (vm, b[0], tc0, is_ip4);
- tcp_output_push_ip (vm, b[1], tc1, is_ip4);
+ if (PREDICT_TRUE (!tc0 + !tc1 == 0))
+ {
+ tcp_output_push_ip (vm, b[0], tc0, is_ip4);
+ tcp_output_push_ip (vm, b[1], tc1, is_ip4);
- tcp_output_handle_packet (tc0, b[0], error_node, &next[0], is_ip4);
- tcp_output_handle_packet (tc1, b[1], error_node, &next[1], is_ip4);
+ tcp_check_if_gso (tc0, b[0]);
+ tcp_check_if_gso (tc1, b[1]);
+
+ tcp_output_handle_packet (tc0, b[0], error_node, &next[0], is_ip4);
+ tcp_output_handle_packet (tc1, b[1], error_node, &next[1], is_ip4);
+ }
+ else
+ {
+ if (tc0 != 0)
+ {
+ tcp_output_push_ip (vm, b[0], tc0, is_ip4);
+ tcp_check_if_gso (tc0, b[0]);
+ tcp_output_handle_packet (tc0, b[0], error_node, &next[0],
+ is_ip4);
+ }
+ else
+ {
+ b[0]->error = error_node->errors[TCP_ERROR_INVALID_CONNECTION];
+ next[0] = TCP_OUTPUT_NEXT_DROP;
+ }
+ if (tc1 != 0)
+ {
+ tcp_output_push_ip (vm, b[1], tc1, is_ip4);
+ tcp_check_if_gso (tc1, b[1]);
+ tcp_output_handle_packet (tc1, b[1], error_node, &next[1],
+ is_ip4);
+ }
+ else
+ {
+ b[1]->error = error_node->errors[TCP_ERROR_INVALID_CONNECTION];
+ next[1] = TCP_OUTPUT_NEXT_DROP;
+ }
+ }
b += 2;
next += 2;
CLIB_PREFETCH (b[1]->data, 2 * CLIB_CACHE_LINE_BYTES, STORE);
}
- next[0] = TCP_OUTPUT_NEXT_IP_LOOKUP;
tc0 = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
thread_index);
- tcp_output_push_ip (vm, b[0], tc0, is_ip4);
- tcp_output_handle_packet (tc0, b[0], error_node, &next[0], is_ip4);
+ if (PREDICT_TRUE (tc0 != 0))
+ {
+ tcp_output_push_ip (vm, b[0], tc0, is_ip4);
+ tcp_check_if_gso (tc0, b[0]);
+ tcp_output_handle_packet (tc0, b[0], error_node, &next[0], is_ip4);
+ }
+ else
+ {
+ b[0]->error = error_node->errors[TCP_ERROR_INVALID_CONNECTION];
+ next[0] = TCP_OUTPUT_NEXT_DROP;
+ }
b += 1;
next += 1;
Code Review / vpp.git / blobdiff