#include <vppinfra/sparse_vec.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/fib/ip6_fib.h>
-#include <vnet/tcp/tcp_packet.h>
#include <vnet/tcp/tcp.h>
+#include <vnet/tcp/tcp_inlines.h>
#include <vnet/session/session.h>
#include <math.h>
&& seq_leq (seq, tc->rcv_nxt + tc->rcv_wnd));
}
-/**
- * Parse TCP header options.
- *
- * @param th TCP header
- * @param to TCP options data structure to be populated
- * @param is_syn set if packet is syn
- * @return -1 if parsing failed
- */
-static inline int
-tcp_options_parse (tcp_header_t * th, tcp_options_t * to, u8 is_syn)
-{
- const u8 *data;
- u8 opt_len, opts_len, kind;
- int j;
- sack_block_t b;
-
- opts_len = (tcp_doff (th) << 2) - sizeof (tcp_header_t);
- data = (const u8 *) (th + 1);
-
- /* Zero out all flags but those set in SYN */
- to->flags &= (TCP_OPTS_FLAG_SACK_PERMITTED | TCP_OPTS_FLAG_WSCALE
- | TCP_OPTS_FLAG_TSTAMP | TCP_OPTS_FLAG_MSS);
-
- for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
- {
- kind = data[0];
-
- /* Get options length */
- if (kind == TCP_OPTION_EOL)
- break;
- else if (kind == TCP_OPTION_NOOP)
- {
- opt_len = 1;
- continue;
- }
- else
- {
- /* broken options */
- if (opts_len < 2)
- return -1;
- opt_len = data[1];
-
- /* weird option length */
- if (opt_len < 2 || opt_len > opts_len)
- return -1;
- }
-
- /* Parse options */
- switch (kind)
- {
- case TCP_OPTION_MSS:
- if (!is_syn)
- break;
- if ((opt_len == TCP_OPTION_LEN_MSS) && tcp_syn (th))
- {
- to->flags |= TCP_OPTS_FLAG_MSS;
- to->mss = clib_net_to_host_u16 (*(u16 *) (data + 2));
- }
- break;
- case TCP_OPTION_WINDOW_SCALE:
- if (!is_syn)
- break;
- if ((opt_len == TCP_OPTION_LEN_WINDOW_SCALE) && tcp_syn (th))
- {
- to->flags |= TCP_OPTS_FLAG_WSCALE;
- to->wscale = data[2];
- if (to->wscale > TCP_MAX_WND_SCALE)
- to->wscale = TCP_MAX_WND_SCALE;
- }
- break;
- case TCP_OPTION_TIMESTAMP:
- if (is_syn)
- to->flags |= TCP_OPTS_FLAG_TSTAMP;
- if ((to->flags & TCP_OPTS_FLAG_TSTAMP)
- && opt_len == TCP_OPTION_LEN_TIMESTAMP)
- {
- to->tsval = clib_net_to_host_u32 (*(u32 *) (data + 2));
- to->tsecr = clib_net_to_host_u32 (*(u32 *) (data + 6));
- }
- break;
- case TCP_OPTION_SACK_PERMITTED:
- if (!is_syn)
- break;
- if (opt_len == TCP_OPTION_LEN_SACK_PERMITTED && tcp_syn (th))
- to->flags |= TCP_OPTS_FLAG_SACK_PERMITTED;
- break;
- case TCP_OPTION_SACK_BLOCK:
- /* If SACK permitted was not advertised or a SYN, break */
- if ((to->flags & TCP_OPTS_FLAG_SACK_PERMITTED) == 0 || tcp_syn (th))
- break;
-
- /* If too short or not correctly formatted, break */
- if (opt_len < 10 || ((opt_len - 2) % TCP_OPTION_LEN_SACK_BLOCK))
- break;
-
- to->flags |= TCP_OPTS_FLAG_SACK;
- to->n_sack_blocks = (opt_len - 2) / TCP_OPTION_LEN_SACK_BLOCK;
- vec_reset_length (to->sacks);
- for (j = 0; j < to->n_sack_blocks; j++)
- {
- b.start = clib_net_to_host_u32 (*(u32 *) (data + 2 + 8 * j));
- b.end = clib_net_to_host_u32 (*(u32 *) (data + 6 + 8 * j));
- vec_add1 (to->sacks, b);
- }
- break;
- default:
- /* Nothing to see here */
- continue;
- }
- }
- return 0;
-}
-
/**
* RFC1323: Check against wrapped sequence numbers (PAWS). If we have
* timestamp to echo and it's less than tsval_recent, drop segment
tcp_connection_set_state (tc, TCP_STATE_CLOSED);
break;
case TCP_STATE_SYN_SENT:
- tcp_program_reset_ntf (wrk, tc);
- tcp_connection_set_state (tc, TCP_STATE_CLOSED);
+ /* Do not program ntf because the connection is half-open */
+ tcp_handle_rst (tc);
break;
case TCP_STATE_ESTABLISHED:
tcp_connection_timers_reset (tc);
- /* Set the cleanup timer, in case the session layer/app don't
- * cleanly close the connection */
- tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.closewait_time);
tcp_cong_recovery_off (tc);
tcp_program_reset_ntf (wrk, tc);
tcp_connection_set_state (tc, TCP_STATE_CLOSED);
+ tcp_program_cleanup (wrk, tc);
break;
case TCP_STATE_CLOSE_WAIT:
case TCP_STATE_FIN_WAIT_1:
case TCP_STATE_CLOSING:
case TCP_STATE_LAST_ACK:
tcp_connection_timers_reset (tc);
- tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.closewait_time);
tcp_cong_recovery_off (tc);
tcp_program_reset_ntf (wrk, tc);
/* Make sure we mark the session as closed. In some states we may
* be still trying to send data */
tcp_connection_set_state (tc, TCP_STATE_CLOSED);
+ tcp_program_cleanup (wrk, tc);
break;
case TCP_STATE_CLOSED:
case TCP_STATE_TIME_WAIT:
}
}
-#ifndef CLIB_MARCH_VARIANT
-void
-tcp_update_rto (tcp_connection_t * tc)
-{
- tc->rto = clib_min (tc->srtt + (tc->rttvar << 2), TCP_RTO_MAX);
- tc->rto = clib_max (tc->rto, TCP_RTO_MIN);
-}
-#endif /* CLIB_MARCH_VARIANT */
-
/**
* Update RTT estimate and RTO timer
*
tc->flags &= ~TCP_CONN_PSH_PENDING;
}
+ if (tcp_is_descheduled (tc))
+ tcp_reschedule (tc);
+
/* If everything has been acked, stop retransmit timer
* otherwise update. */
- tcp_retransmit_timer_update (tc);
+ tcp_retransmit_timer_update (&wrk->timer_wheel, tc);
/* Update pacer based on our new cwnd estimate */
tcp_connection_tx_pacer_update (tc);
tc->burst_acked += tc->bytes_acked;
}
-#ifndef CLIB_MARCH_VARIANT
-static u32
-scoreboard_hole_index (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- ASSERT (!pool_is_free_index (sb->holes, hole - sb->holes));
- return hole - sb->holes;
-}
-
-static u32
-scoreboard_hole_bytes (sack_scoreboard_hole_t * hole)
-{
- return hole->end - hole->start;
-}
-
-sack_scoreboard_hole_t *
-scoreboard_get_hole (sack_scoreboard_t * sb, u32 index)
-{
- if (index != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, index);
- return 0;
-}
-
-sack_scoreboard_hole_t *
-scoreboard_next_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- if (hole->next != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, hole->next);
- return 0;
-}
-
-sack_scoreboard_hole_t *
-scoreboard_prev_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- if (hole->prev != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, hole->prev);
- return 0;
-}
-
-sack_scoreboard_hole_t *
-scoreboard_first_hole (sack_scoreboard_t * sb)
-{
- if (sb->head != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, sb->head);
- return 0;
-}
-
-sack_scoreboard_hole_t *
-scoreboard_last_hole (sack_scoreboard_t * sb)
-{
- if (sb->tail != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, sb->tail);
- return 0;
-}
-
-static void
-scoreboard_remove_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- sack_scoreboard_hole_t *next, *prev;
-
- if (hole->next != TCP_INVALID_SACK_HOLE_INDEX)
- {
- next = pool_elt_at_index (sb->holes, hole->next);
- next->prev = hole->prev;
- }
- else
- {
- sb->tail = hole->prev;
- }
-
- if (hole->prev != TCP_INVALID_SACK_HOLE_INDEX)
- {
- prev = pool_elt_at_index (sb->holes, hole->prev);
- prev->next = hole->next;
- }
- else
- {
- sb->head = hole->next;
- }
-
- if (scoreboard_hole_index (sb, hole) == sb->cur_rxt_hole)
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
-
- /* Poison the entry */
- if (CLIB_DEBUG > 0)
- clib_memset (hole, 0xfe, sizeof (*hole));
-
- pool_put (sb->holes, hole);
-}
-
-static sack_scoreboard_hole_t *
-scoreboard_insert_hole (sack_scoreboard_t * sb, u32 prev_index,
- u32 start, u32 end)
-{
- sack_scoreboard_hole_t *hole, *next, *prev;
- u32 hole_index;
-
- pool_get (sb->holes, hole);
- clib_memset (hole, 0, sizeof (*hole));
-
- hole->start = start;
- hole->end = end;
- hole_index = scoreboard_hole_index (sb, hole);
-
- prev = scoreboard_get_hole (sb, prev_index);
- if (prev)
- {
- hole->prev = prev_index;
- hole->next = prev->next;
-
- if ((next = scoreboard_next_hole (sb, hole)))
- next->prev = hole_index;
- else
- sb->tail = hole_index;
-
- prev->next = hole_index;
- }
- else
- {
- sb->head = hole_index;
- hole->prev = TCP_INVALID_SACK_HOLE_INDEX;
- hole->next = TCP_INVALID_SACK_HOLE_INDEX;
- }
-
- return hole;
-}
-
-always_inline void
-scoreboard_update_sacked_rxt (sack_scoreboard_t * sb, u32 start, u32 end,
- u8 has_rxt)
-{
- if (!has_rxt || seq_geq (start, sb->high_rxt))
- return;
-
- sb->rxt_sacked +=
- seq_lt (end, sb->high_rxt) ? (end - start) : (sb->high_rxt - start);
-}
-
-always_inline void
-scoreboard_update_bytes (sack_scoreboard_t * sb, u32 ack, u32 snd_mss)
-{
- sack_scoreboard_hole_t *left, *right;
- u32 sacked = 0, blks = 0, old_sacked;
-
- old_sacked = sb->sacked_bytes;
-
- sb->last_lost_bytes = 0;
- sb->lost_bytes = 0;
- sb->sacked_bytes = 0;
-
- right = scoreboard_last_hole (sb);
- if (!right)
- {
- sb->sacked_bytes = sb->high_sacked - ack;
- sb->last_sacked_bytes = sb->sacked_bytes
- - (old_sacked - sb->last_bytes_delivered);
- return;
- }
-
- if (seq_gt (sb->high_sacked, right->end))
- {
- sacked = sb->high_sacked - right->end;
- blks = 1;
- }
-
- while (sacked < (TCP_DUPACK_THRESHOLD - 1) * snd_mss
- && blks < TCP_DUPACK_THRESHOLD)
- {
- if (right->is_lost)
- sb->lost_bytes += scoreboard_hole_bytes (right);
-
- left = scoreboard_prev_hole (sb, right);
- if (!left)
- {
- ASSERT (right->start == ack || sb->is_reneging);
- sacked += right->start - ack;
- right = 0;
- break;
- }
-
- sacked += right->start - left->end;
- blks++;
- right = left;
- }
-
- /* right is first lost */
- while (right)
- {
- sb->lost_bytes += scoreboard_hole_bytes (right);
- sb->last_lost_bytes += right->is_lost ? 0 : (right->end - right->start);
- right->is_lost = 1;
- left = scoreboard_prev_hole (sb, right);
- if (!left)
- {
- ASSERT (right->start == ack || sb->is_reneging);
- sacked += right->start - ack;
- break;
- }
- sacked += right->start - left->end;
- right = left;
- }
-
- sb->sacked_bytes = sacked;
- sb->last_sacked_bytes = sacked - (old_sacked - sb->last_bytes_delivered);
-}
-
-/**
- * Figure out the next hole to retransmit
- *
- * Follows logic proposed in RFC6675 Sec. 4, NextSeg()
- */
-sack_scoreboard_hole_t *
-scoreboard_next_rxt_hole (sack_scoreboard_t * sb,
- sack_scoreboard_hole_t * start,
- u8 have_unsent, u8 * can_rescue, u8 * snd_limited)
-{
- sack_scoreboard_hole_t *hole = 0;
-
- hole = start ? start : scoreboard_first_hole (sb);
- while (hole && seq_leq (hole->end, sb->high_rxt) && hole->is_lost)
- hole = scoreboard_next_hole (sb, hole);
-
- /* Nothing, return */
- if (!hole)
- {
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
- return 0;
- }
-
- /* Rule (1): if higher than rxt, less than high_sacked and lost */
- if (hole->is_lost && seq_lt (hole->start, sb->high_sacked))
- {
- sb->cur_rxt_hole = scoreboard_hole_index (sb, hole);
- }
- else
- {
- /* Rule (2): available unsent data */
- if (have_unsent)
- {
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
- return 0;
- }
- /* Rule (3): if hole not lost */
- else if (seq_lt (hole->start, sb->high_sacked))
- {
- /* And we didn't already retransmit it */
- if (seq_leq (hole->end, sb->high_rxt))
- {
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
- return 0;
- }
- *snd_limited = 0;
- sb->cur_rxt_hole = scoreboard_hole_index (sb, hole);
- }
- /* Rule (4): if hole beyond high_sacked */
- else
- {
- ASSERT (seq_geq (hole->start, sb->high_sacked));
- *snd_limited = 1;
- *can_rescue = 1;
- /* HighRxt MUST NOT be updated */
- return 0;
- }
- }
-
- if (hole && seq_lt (sb->high_rxt, hole->start))
- sb->high_rxt = hole->start;
-
- return hole;
-}
-
-void
-scoreboard_init_rxt (sack_scoreboard_t * sb, u32 snd_una)
-{
- sack_scoreboard_hole_t *hole;
- hole = scoreboard_first_hole (sb);
- if (hole)
- {
- snd_una = seq_gt (snd_una, hole->start) ? snd_una : hole->start;
- sb->cur_rxt_hole = sb->head;
- }
- sb->high_rxt = snd_una;
- sb->rescue_rxt = snd_una - 1;
-}
-
-void
-scoreboard_init (sack_scoreboard_t * sb)
-{
- sb->head = TCP_INVALID_SACK_HOLE_INDEX;
- sb->tail = TCP_INVALID_SACK_HOLE_INDEX;
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
-}
-
-void
-scoreboard_clear (sack_scoreboard_t * sb)
-{
- sack_scoreboard_hole_t *hole;
- while ((hole = scoreboard_first_hole (sb)))
- {
- scoreboard_remove_hole (sb, hole);
- }
- ASSERT (sb->head == sb->tail && sb->head == TCP_INVALID_SACK_HOLE_INDEX);
- ASSERT (pool_elts (sb->holes) == 0);
- sb->sacked_bytes = 0;
- sb->last_sacked_bytes = 0;
- sb->last_bytes_delivered = 0;
- sb->lost_bytes = 0;
- sb->last_lost_bytes = 0;
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
- sb->is_reneging = 0;
-}
-
-void
-scoreboard_clear_reneging (sack_scoreboard_t * sb, u32 start, u32 end)
-{
- sack_scoreboard_hole_t *last_hole;
-
- clib_warning ("sack reneging");
-
- scoreboard_clear (sb);
- last_hole = scoreboard_insert_hole (sb, TCP_INVALID_SACK_HOLE_INDEX,
- start, end);
- last_hole->is_lost = 1;
- sb->tail = scoreboard_hole_index (sb, last_hole);
- sb->high_sacked = start;
- scoreboard_init_rxt (sb, start);
-}
-
-#endif /* CLIB_MARCH_VARIANT */
-
-/**
- * Test that scoreboard is sane after recovery
- *
- * Returns 1 if scoreboard is empty or if first hole beyond
- * snd_una.
- */
-static u8
-tcp_scoreboard_is_sane_post_recovery (tcp_connection_t * tc)
-{
- sack_scoreboard_hole_t *hole;
- hole = scoreboard_first_hole (&tc->sack_sb);
- return (!hole || (seq_geq (hole->start, tc->snd_una)
- && seq_lt (hole->end, tc->snd_nxt)));
-}
-
-#ifndef CLIB_MARCH_VARIANT
-
-void
-tcp_rcv_sacks (tcp_connection_t * tc, u32 ack)
-{
- sack_scoreboard_hole_t *hole, *next_hole;
- sack_scoreboard_t *sb = &tc->sack_sb;
- sack_block_t *blk, *rcv_sacks;
- u32 blk_index = 0, i, j;
- u8 has_rxt;
-
- sb->last_sacked_bytes = 0;
- sb->last_bytes_delivered = 0;
- sb->rxt_sacked = 0;
-
- if (!tcp_opts_sack (&tc->rcv_opts) && !sb->sacked_bytes
- && sb->head == TCP_INVALID_SACK_HOLE_INDEX)
- return;
-
- has_rxt = tcp_in_cong_recovery (tc);
-
- /* Remove invalid blocks */
- blk = tc->rcv_opts.sacks;
- while (blk < vec_end (tc->rcv_opts.sacks))
- {
- if (seq_lt (blk->start, blk->end)
- && seq_gt (blk->start, tc->snd_una)
- && seq_gt (blk->start, ack)
- && seq_lt (blk->start, tc->snd_nxt)
- && seq_leq (blk->end, tc->snd_nxt))
- {
- blk++;
- continue;
- }
- vec_del1 (tc->rcv_opts.sacks, blk - tc->rcv_opts.sacks);
- }
-
- /* Add block for cumulative ack */
- if (seq_gt (ack, tc->snd_una))
- {
- vec_add2 (tc->rcv_opts.sacks, blk, 1);
- blk->start = tc->snd_una;
- blk->end = ack;
- }
-
- if (vec_len (tc->rcv_opts.sacks) == 0)
- return;
-
- tcp_scoreboard_trace_add (tc, ack);
-
- /* Make sure blocks are ordered */
- rcv_sacks = tc->rcv_opts.sacks;
- for (i = 0; i < vec_len (rcv_sacks); i++)
- for (j = i + 1; j < vec_len (rcv_sacks); j++)
- if (seq_lt (rcv_sacks[j].start, rcv_sacks[i].start))
- {
- sack_block_t tmp = rcv_sacks[i];
- rcv_sacks[i] = rcv_sacks[j];
- rcv_sacks[j] = tmp;
- }
-
- if (sb->head == TCP_INVALID_SACK_HOLE_INDEX)
- {
- /* Handle reneging as a special case */
- if (PREDICT_FALSE (sb->is_reneging))
- {
- /* No holes, only sacked bytes */
- if (seq_leq (tc->snd_nxt, sb->high_sacked))
- {
- /* No progress made so return */
- if (seq_leq (ack, tc->snd_una))
- return;
-
- /* Update sacked bytes delivered and return */
- sb->last_bytes_delivered = ack - tc->snd_una;
- sb->sacked_bytes -= sb->last_bytes_delivered;
- sb->is_reneging = seq_lt (ack, sb->high_sacked);
- return;
- }
-
- /* New hole above high sacked. Add it and process normally */
- hole = scoreboard_insert_hole (sb, TCP_INVALID_SACK_HOLE_INDEX,
- sb->high_sacked, tc->snd_nxt);
- sb->tail = scoreboard_hole_index (sb, hole);
- }
- /* Not reneging and no holes. Insert the first that covers all
- * outstanding bytes */
- else
- {
- hole = scoreboard_insert_hole (sb, TCP_INVALID_SACK_HOLE_INDEX,
- tc->snd_una, tc->snd_nxt);
- sb->tail = scoreboard_hole_index (sb, hole);
- }
- sb->high_sacked = rcv_sacks[vec_len (rcv_sacks) - 1].end;
- }
- else
- {
- /* If we have holes but snd_nxt is beyond the last hole, update
- * last hole end or add new hole after high sacked */
- hole = scoreboard_last_hole (sb);
- if (seq_gt (tc->snd_nxt, hole->end))
- {
- if (seq_geq (hole->start, sb->high_sacked))
- {
- hole->end = tc->snd_nxt;
- }
- /* New hole after high sacked block */
- else if (seq_lt (sb->high_sacked, tc->snd_nxt))
- {
- scoreboard_insert_hole (sb, sb->tail, sb->high_sacked,
- tc->snd_nxt);
- }
- }
-
- /* Keep track of max byte sacked for when the last hole
- * is acked */
- sb->high_sacked = seq_max (rcv_sacks[vec_len (rcv_sacks) - 1].end,
- sb->high_sacked);
- }
-
- /* Walk the holes with the SACK blocks */
- hole = pool_elt_at_index (sb->holes, sb->head);
-
- if (PREDICT_FALSE (sb->is_reneging))
- {
- sb->last_bytes_delivered += clib_min (hole->start - tc->snd_una,
- ack - tc->snd_una);
- sb->is_reneging = seq_lt (ack, hole->start);
- }
-
- while (hole && blk_index < vec_len (rcv_sacks))
- {
- blk = &rcv_sacks[blk_index];
- if (seq_leq (blk->start, hole->start))
- {
- /* Block covers hole. Remove hole */
- if (seq_geq (blk->end, hole->end))
- {
- next_hole = scoreboard_next_hole (sb, hole);
-
- /* If covered by ack, compute delivered bytes */
- if (blk->end == ack)
- {
- u32 sacked = next_hole ? next_hole->start : sb->high_sacked;
- if (PREDICT_FALSE (seq_lt (ack, sacked)))
- {
- sb->last_bytes_delivered += ack - hole->end;
- sb->is_reneging = 1;
- }
- else
- {
- sb->last_bytes_delivered += sacked - hole->end;
- sb->is_reneging = 0;
- }
- }
- scoreboard_update_sacked_rxt (sb, hole->start, hole->end,
- has_rxt);
- scoreboard_remove_hole (sb, hole);
- hole = next_hole;
- }
- /* Partial 'head' overlap */
- else
- {
- if (seq_gt (blk->end, hole->start))
- {
- scoreboard_update_sacked_rxt (sb, hole->start, blk->end,
- has_rxt);
- hole->start = blk->end;
- }
- blk_index++;
- }
- }
- else
- {
- /* Hole must be split */
- if (seq_lt (blk->end, hole->end))
- {
- u32 hole_index = scoreboard_hole_index (sb, hole);
- next_hole = scoreboard_insert_hole (sb, hole_index, blk->end,
- hole->end);
- /* Pool might've moved */
- hole = scoreboard_get_hole (sb, hole_index);
- hole->end = blk->start;
-
- scoreboard_update_sacked_rxt (sb, blk->start, blk->end,
- has_rxt);
-
- blk_index++;
- ASSERT (hole->next == scoreboard_hole_index (sb, next_hole));
- }
- else if (seq_lt (blk->start, hole->end))
- {
- scoreboard_update_sacked_rxt (sb, blk->start, hole->end,
- has_rxt);
- hole->end = blk->start;
- }
- hole = scoreboard_next_hole (sb, hole);
- }
- }
-
- scoreboard_update_bytes (sb, ack, tc->snd_mss);
-
- ASSERT (sb->last_sacked_bytes <= sb->sacked_bytes || tcp_in_recovery (tc));
- ASSERT (sb->sacked_bytes == 0 || tcp_in_recovery (tc)
- || sb->sacked_bytes <= tc->snd_nxt - seq_max (tc->snd_una, ack));
- ASSERT (sb->last_sacked_bytes + sb->lost_bytes <= tc->snd_nxt
- - seq_max (tc->snd_una, ack) || tcp_in_recovery (tc));
- ASSERT (sb->head == TCP_INVALID_SACK_HOLE_INDEX || tcp_in_recovery (tc)
- || sb->is_reneging || sb->holes[sb->head].start == ack);
- ASSERT (sb->last_lost_bytes <= sb->lost_bytes);
- ASSERT ((ack - tc->snd_una) + sb->last_sacked_bytes
- - sb->last_bytes_delivered >= sb->rxt_sacked);
- ASSERT ((ack - tc->snd_una) >= tc->sack_sb.last_bytes_delivered
- || (tc->flags & TCP_CONN_FINSNT));
-
- TCP_EVT (TCP_EVT_CC_SCOREBOARD, tc);
-}
-#endif /* CLIB_MARCH_VARIANT */
-
/**
* Try to update snd_wnd based on feedback received from peer.
*
/* Set persist timer if not set and we just got 0 wnd */
if (!tcp_timer_is_active (tc, TCP_TIMER_PERSIST)
&& !tcp_timer_is_active (tc, TCP_TIMER_RETRANSMIT))
- tcp_persist_timer_set (tc);
+ {
+ tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index);
+ tcp_persist_timer_set (&wrk->timer_wheel, tc);
+ }
}
else
{
- tcp_persist_timer_reset (tc);
+ if (PREDICT_FALSE (tcp_timer_is_active (tc, TCP_TIMER_PERSIST)))
+ {
+ tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index);
+ tcp_persist_timer_reset (&wrk->timer_wheel, tc);
+ }
+
+ if (PREDICT_FALSE (tcp_is_descheduled (tc)))
+ tcp_reschedule (tc);
+
if (PREDICT_FALSE (!tcp_in_recovery (tc) && tc->rto_boff > 0))
{
tc->rto_boff = 0;
ASSERT (tc->rto_boff == 0);
ASSERT (!tcp_in_cong_recovery (tc));
ASSERT (tcp_scoreboard_is_sane_post_recovery (tc));
+
return is_spurious;
}
tc->rxt_delivered += tc->sack_sb.rxt_sacked;
tc->prr_delivered += tc->bytes_acked + tc->sack_sb.last_sacked_bytes
- tc->sack_sb.last_bytes_delivered;
-
- tcp_program_retransmit (tc);
}
else
{
/* If partial ack, assume that the first un-acked segment was lost */
if (tc->bytes_acked || tc->rcv_dupacks == TCP_DUPACK_THRESHOLD)
tcp_fastrecovery_first_on (tc);
-
- tcp_program_retransmit (tc);
}
/*
return;
}
+ tcp_program_retransmit (tc);
+
/*
* Notify cc of the event
*/
* in CLOSE-WAIT, set timer (reuse WAITCLOSE). */
tcp_connection_set_state (tc, TCP_STATE_CLOSE_WAIT);
tcp_program_disconnect (wrk, tc);
- tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.closewait_time);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.closewait_time);
TCP_EVT (TCP_EVT_FIN_RCVD, tc);
*error = TCP_ERROR_FIN_RCVD;
}
-#ifndef CLIB_MARCH_VARIANT
-static u8
-tcp_sack_vector_is_sane (sack_block_t * sacks)
-{
- int i;
- for (i = 1; i < vec_len (sacks); i++)
- {
- if (sacks[i - 1].end == sacks[i].start)
- return 0;
- }
- return 1;
-}
-
-/**
- * Build SACK list as per RFC2018.
- *
- * Makes sure the first block contains the segment that generated the current
- * ACK and the following ones are the ones most recently reported in SACK
- * blocks.
- *
- * @param tc TCP connection for which the SACK list is updated
- * @param start Start sequence number of the newest SACK block
- * @param end End sequence of the newest SACK block
- */
-void
-tcp_update_sack_list (tcp_connection_t * tc, u32 start, u32 end)
-{
- sack_block_t *new_list = tc->snd_sacks_fl, *block = 0;
- int i;
-
- /* If the first segment is ooo add it to the list. Last write might've moved
- * rcv_nxt over the first segment. */
- if (seq_lt (tc->rcv_nxt, start))
- {
- vec_add2 (new_list, block, 1);
- block->start = start;
- block->end = end;
- }
-
- /* Find the blocks still worth keeping. */
- for (i = 0; i < vec_len (tc->snd_sacks); i++)
- {
- /* Discard if rcv_nxt advanced beyond current block */
- if (seq_leq (tc->snd_sacks[i].start, tc->rcv_nxt))
- continue;
-
- /* Merge or drop if segment overlapped by the new segment */
- if (block && (seq_geq (tc->snd_sacks[i].end, new_list[0].start)
- && seq_leq (tc->snd_sacks[i].start, new_list[0].end)))
- {
- if (seq_lt (tc->snd_sacks[i].start, new_list[0].start))
- new_list[0].start = tc->snd_sacks[i].start;
- if (seq_lt (new_list[0].end, tc->snd_sacks[i].end))
- new_list[0].end = tc->snd_sacks[i].end;
- continue;
- }
-
- /* Save to new SACK list if we have space. */
- if (vec_len (new_list) < TCP_MAX_SACK_BLOCKS)
- vec_add1 (new_list, tc->snd_sacks[i]);
- }
-
- ASSERT (vec_len (new_list) <= TCP_MAX_SACK_BLOCKS);
-
- /* Replace old vector with new one */
- vec_reset_length (tc->snd_sacks);
- tc->snd_sacks_fl = tc->snd_sacks;
- tc->snd_sacks = new_list;
-
- /* Segments should not 'touch' */
- ASSERT (tcp_sack_vector_is_sane (tc->snd_sacks));
-}
-
-u32
-tcp_sack_list_bytes (tcp_connection_t * tc)
-{
- u32 bytes = 0, i;
- for (i = 0; i < vec_len (tc->snd_sacks); i++)
- bytes += tc->snd_sacks[i].end - tc->snd_sacks[i].start;
- return bytes;
-}
-#endif /* CLIB_MARCH_VARIANT */
-
/** Enqueue data for delivery to application */
static int
tcp_session_enqueue_data (tcp_connection_t * tc, vlib_buffer_t * b,
}
else
{
+ /* Packet made it through for ack processing */
+ if (tc->rcv_wnd < tc->snd_mss)
+ return TCP_ERROR_ZERO_RWND;
+
return TCP_ERROR_FIFO_FULL;
}
* retransmissions since we may not have any data to send */
if (seq_leq (vnet_buffer (b)->tcp.seq_end, tc->rcv_nxt))
{
- tcp_program_ack (tc);
+ tcp_program_dupack (tc);
+ tc->errors.below_data_wnd++;
error = TCP_ERROR_SEGMENT_OLD;
goto done;
}
if (tcp_can_delack (tc))
{
if (!tcp_timer_is_active (tc, TCP_TIMER_DELACK))
- tcp_timer_set (tc, TCP_TIMER_DELACK, tcp_cfg.delack_time);
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_DELACK,
+ tcp_cfg.delack_time);
goto done;
}
new_tc0->timers[TCP_TIMER_RETRANSMIT_SYN] = TCP_TIMER_HANDLE_INVALID;
new_tc0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- /* 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_opts_tstamp (&new_tc0->rcv_opts))
{
new_tc0->tsval_recent = new_tc0->rcv_opts.tsval;
/* Notify app that we have connection. If session layer can't
* allocate session send reset */
- if (session_stream_connect_notify (&new_tc0->connection, 0))
+ if (session_stream_connect_notify (&new_tc0->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;
- goto drop;
+ goto cleanup_ho;
}
new_tc0->tx_fifo_size =
new_tc0->state = TCP_STATE_SYN_RCVD;
/* Notify app that we have connection */
- if (session_stream_connect_notify (&new_tc0->connection, 0))
+ if (session_stream_connect_notify (&new_tc0->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;
- goto drop;
+ goto cleanup_ho;
}
new_tc0->tx_fifo_size =
tcp_init_snd_vars (new_tc0);
tcp_send_synack (new_tc0);
error0 = TCP_ERROR_SYNS_RCVD;
- goto drop;
+ goto cleanup_ho;
}
if (!(new_tc0->cfg_flags & TCP_CFG_F_NO_TSO))
tcp_send_ack (new_tc0);
}
+ 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;
+
drop:
tcp_inc_counter (syn_sent, error0, 1);
/* Make sure the segment is exactly right */
if (tc0->rcv_nxt != vnet_buffer (b0)->tcp.seq_number || is_fin0)
{
- tcp_rcv_rst (wrk, tc0);
+ tcp_send_reset_w_pkt (tc0, b0, thread_index, is_ip4);
error0 = TCP_ERROR_SEGMENT_INVALID;
goto drop;
}
*/
if (tcp_rcv_ack_no_cc (tc0, b0, &error0))
{
- tcp_rcv_rst (wrk, tc0);
+ tcp_send_reset_w_pkt (tc0, b0, thread_index, is_ip4);
+ error0 = TCP_ERROR_SEGMENT_INVALID;
goto drop;
}
tc0->snd_wl2 = vnet_buffer (b0)->tcp.ack_number;
/* Reset SYN-ACK retransmit and SYN_RCV establish timers */
- tcp_retransmit_timer_reset (tc0);
+ tcp_retransmit_timer_reset (&wrk->timer_wheel, tc0);
if (session_stream_accept_notify (&tc0->connection))
{
error0 = TCP_ERROR_MSG_QUEUE_FULL;
- tcp_rcv_rst (wrk, tc0);
+ tcp_send_reset (tc0);
+ session_transport_delete_notify (&tc0->connection);
+ tcp_connection_cleanup (tc0);
goto drop;
}
error0 = TCP_ERROR_ACK_OK;
tcp_send_fin (tc0);
/* If a fin was received and data was acked extend wait */
else if ((tc0->flags & TCP_CONN_FINRCVD) && tc0->bytes_acked)
- tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE,
+ tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
tcp_cfg.closewait_time);
}
/* If FIN is ACKed */
if (tc0->flags & TCP_CONN_FINRCVD)
{
tcp_connection_set_state (tc0, TCP_STATE_CLOSED);
- tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE,
- tcp_cfg.cleanup_time);
session_transport_closed_notify (&tc0->connection);
+ tcp_program_cleanup (wrk, tc0);
goto drop;
}
tcp_connection_set_state (tc0, TCP_STATE_FIN_WAIT_2);
/* Enable waitclose because we're willing to wait for peer's
* FIN but not indefinitely. */
- tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.finwait2_time);
+ tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.finwait2_time);
/* Don't try to deq the FIN acked */
if (tc0->burst_acked > 1)
tcp_send_fin (tc0);
tcp_connection_timers_reset (tc0);
tcp_connection_set_state (tc0, TCP_STATE_LAST_ACK);
- tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.lastack_time);
+ tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.lastack_time);
break;
case TCP_STATE_CLOSING:
/* In addition to the processing for the ESTABLISHED state, if
tcp_connection_timers_reset (tc0);
tcp_connection_set_state (tc0, TCP_STATE_TIME_WAIT);
- tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.timewait_time);
+ tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.timewait_time);
session_transport_closed_notify (&tc0->connection);
goto drop;
* 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_timer_set (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
+ tcp_program_cleanup (tcp_get_worker (tc0->c_thread_index), tc0);
goto drop;
goto drop;
tcp_program_ack (tc0);
- tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.timewait_time);
+ tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.timewait_time);
goto drop;
break;
tcp_program_ack (tc0);
tcp_connection_set_state (tc0, TCP_STATE_CLOSE_WAIT);
tcp_program_disconnect (wrk, tc0);
- tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.closewait_time);
+ tcp_timer_update (&wrk->timer_wheel, tc0, 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
tc0->rcv_nxt += 1;
tcp_send_fin (tc0);
tcp_connection_set_state (tc0, TCP_STATE_LAST_ACK);
- tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.lastack_time);
+ tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.lastack_time);
break;
case TCP_STATE_CLOSE_WAIT:
case TCP_STATE_CLOSING:
* sending it. Since we already received a fin, do not wait
* for too long. */
tc0->flags |= TCP_CONN_FINRCVD;
- tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE,
+ tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
tcp_cfg.closewait_time);
}
else
tcp_connection_set_state (tc0, TCP_STATE_CLOSING);
tcp_program_ack (tc0);
/* Wait for ACK for our FIN but not forever */
- tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE,
+ tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
tcp_cfg.closing_time);
}
break;
tc0->rcv_nxt += 1;
tcp_connection_set_state (tc0, TCP_STATE_TIME_WAIT);
tcp_connection_timers_reset (tc0);
- tcp_timer_set (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.timewait_time);
+ tcp_timer_set (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.timewait_time);
tcp_program_ack (tc0);
session_transport_closed_notify (&tc0->connection);
break;
/* Remain in the TIME-WAIT state. Restart the time-wait
* timeout.
*/
- tcp_timer_update (tc0, TCP_TIMER_WAITCLOSE, tcp_cfg.timewait_time);
+ tcp_timer_update (&wrk->timer_wheel, tc0, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.timewait_time);
break;
}
error0 = TCP_ERROR_FIN_RCVD;
vlib_frame_t * from_frame, int is_ip4)
{
u32 n_left_from, *from, n_syns = 0, *first_buffer;
- u32 my_thread_index = vm->thread_index;
- tcp_connection_t *tc0;
+ u32 thread_index = vm->thread_index;
from = first_buffer = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
while (n_left_from > 0)
{
- u32 bi0;
- vlib_buffer_t *b0;
- tcp_rx_trace_t *t0;
- tcp_header_t *th0 = 0;
- tcp_connection_t *lc0;
- ip4_header_t *ip40;
- ip6_header_t *ip60;
- tcp_connection_t *child0;
- u32 error0 = TCP_ERROR_NONE;
+ u32 bi, error = TCP_ERROR_NONE;
+ tcp_connection_t *lc, *child;
+ vlib_buffer_t *b;
- bi0 = from[0];
+ bi = from[0];
from += 1;
n_left_from -= 1;
- b0 = vlib_get_buffer (vm, bi0);
-
- if (is_ip4)
- {
- ip40 = vlib_buffer_get_current (b0);
- th0 = tcp_buffer_hdr (b0);
- }
- else
- {
- ip60 = vlib_buffer_get_current (b0);
- th0 = tcp_buffer_hdr (b0);
- }
+ b = vlib_get_buffer (vm, bi);
- lc0 = tcp_listener_get (vnet_buffer (b0)->tcp.connection_index);
- if (PREDICT_FALSE (lc0 == 0))
+ lc = tcp_listener_get (vnet_buffer (b)->tcp.connection_index);
+ if (PREDICT_FALSE (lc == 0))
{
- tc0 = tcp_connection_get (vnet_buffer (b0)->tcp.connection_index,
- my_thread_index);
- if (tc0->state != TCP_STATE_TIME_WAIT)
+ tcp_connection_t *tc;
+ tc = tcp_connection_get (vnet_buffer (b)->tcp.connection_index,
+ thread_index);
+ if (tc->state != TCP_STATE_TIME_WAIT)
{
- error0 = TCP_ERROR_CREATE_EXISTS;
- goto drop;
+ error = TCP_ERROR_CREATE_EXISTS;
+ goto done;
}
- lc0 = tcp_lookup_listener (b0, tc0->c_fib_index, is_ip4);
+ lc = tcp_lookup_listener (b, tc->c_fib_index, is_ip4);
/* clean up the old session */
- tcp_connection_del (tc0);
+ tcp_connection_del (tc);
+ }
+
+ /* Make sure connection wasn't just created */
+ child = tcp_lookup_connection (lc->c_fib_index, b, thread_index,
+ is_ip4);
+ if (PREDICT_FALSE (child->state != TCP_STATE_LISTEN))
+ {
+ error = TCP_ERROR_CREATE_EXISTS;
+ goto done;
}
/* Create child session. For syn-flood protection use filter */
/* 3. check for a SYN (did that already) */
- /* Make sure connection wasn't just created */
- child0 = tcp_lookup_connection (lc0->c_fib_index, b0, my_thread_index,
- is_ip4);
- if (PREDICT_FALSE (child0->state != TCP_STATE_LISTEN))
- {
- error0 = TCP_ERROR_CREATE_EXISTS;
- goto drop;
- }
-
/* Create child session and send SYN-ACK */
- child0 = tcp_connection_alloc (my_thread_index);
- child0->c_lcl_port = th0->dst_port;
- child0->c_rmt_port = th0->src_port;
- child0->c_is_ip4 = is_ip4;
- child0->state = TCP_STATE_SYN_RCVD;
- child0->c_fib_index = lc0->c_fib_index;
- child0->cc_algo = lc0->cc_algo;
-
- if (is_ip4)
- {
- child0->c_lcl_ip4.as_u32 = ip40->dst_address.as_u32;
- child0->c_rmt_ip4.as_u32 = ip40->src_address.as_u32;
- }
- else
- {
- clib_memcpy_fast (&child0->c_lcl_ip6, &ip60->dst_address,
- sizeof (ip6_address_t));
- clib_memcpy_fast (&child0->c_rmt_ip6, &ip60->src_address,
- sizeof (ip6_address_t));
- }
+ child = tcp_connection_alloc (thread_index);
- if (tcp_options_parse (th0, &child0->rcv_opts, 1))
+ if (tcp_options_parse (tcp_buffer_hdr (b), &child->rcv_opts, 1))
{
- error0 = TCP_ERROR_OPTIONS;
- tcp_connection_free (child0);
- goto drop;
+ error = TCP_ERROR_OPTIONS;
+ tcp_connection_free (child);
+ goto done;
}
- child0->irs = vnet_buffer (b0)->tcp.seq_number;
- child0->rcv_nxt = vnet_buffer (b0)->tcp.seq_number + 1;
- child0->rcv_las = child0->rcv_nxt;
- child0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ tcp_init_w_buffer (child, b, is_ip4);
- /* RFC1323: TSval timestamps sent on {SYN} and {SYN,ACK}
- * segments are used to initialize PAWS. */
- if (tcp_opts_tstamp (&child0->rcv_opts))
+ child->state = TCP_STATE_SYN_RCVD;
+ child->c_fib_index = lc->c_fib_index;
+ child->cc_algo = lc->cc_algo;
+ tcp_connection_init_vars (child);
+ child->rto = TCP_RTO_MIN;
+
+ if (session_stream_accept (&child->connection, lc->c_s_index,
+ lc->c_thread_index, 0 /* notify */ ))
{
- child0->tsval_recent = child0->rcv_opts.tsval;
- child0->tsval_recent_age = tcp_time_now ();
+ tcp_connection_cleanup (child);
+ error = TCP_ERROR_CREATE_SESSION_FAIL;
+ goto done;
}
- if (tcp_opts_wscale (&child0->rcv_opts))
- child0->snd_wscale = child0->rcv_opts.wscale;
-
- child0->snd_wnd = clib_net_to_host_u16 (th0->window)
- << child0->snd_wscale;
- child0->snd_wl1 = vnet_buffer (b0)->tcp.seq_number;
- child0->snd_wl2 = vnet_buffer (b0)->tcp.ack_number;
-
- tcp_connection_init_vars (child0);
- child0->rto = TCP_RTO_MIN;
+ child->tx_fifo_size = transport_tx_fifo_size (&child->connection);
- if (session_stream_accept (&child0->connection, lc0->c_s_index,
- lc0->c_thread_index, 0 /* notify */ ))
- {
- tcp_connection_cleanup (child0);
- error0 = TCP_ERROR_CREATE_SESSION_FAIL;
- goto drop;
- }
+ tcp_send_synack (child);
- TCP_EVT (TCP_EVT_SYN_RCVD, child0, 1);
- child0->tx_fifo_size = transport_tx_fifo_size (&child0->connection);
- tcp_send_synack (child0);
+ TCP_EVT (TCP_EVT_SYN_RCVD, child, 1);
- drop:
+ done:
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
{
- t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- clib_memcpy_fast (&t0->tcp_header, th0, sizeof (t0->tcp_header));
- clib_memcpy_fast (&t0->tcp_connection, lc0,
- sizeof (t0->tcp_connection));
+ 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));
}
- n_syns += (error0 == TCP_ERROR_NONE);
+ n_syns += (error == TCP_ERROR_NONE);
}
tcp_inc_counter (listen, TCP_ERROR_SYNS_RCVD, n_syns);
}
}
-always_inline tcp_connection_t *
-tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error,
- u8 is_ip4, u8 is_nolookup)
-{
- u32 fib_index = vnet_buffer (b)->ip.fib_index;
- int n_advance_bytes, n_data_bytes;
- transport_connection_t *tc;
- tcp_header_t *tcp;
- u8 result = 0;
-
- if (is_ip4)
- {
- ip4_header_t *ip4 = vlib_buffer_get_current (b);
- int ip_hdr_bytes = ip4_header_bytes (ip4);
- if (PREDICT_FALSE (b->current_length < ip_hdr_bytes + sizeof (*tcp)))
- {
- *error = TCP_ERROR_LENGTH;
- return 0;
- }
- tcp = ip4_next_header (ip4);
- vnet_buffer (b)->tcp.hdr_offset = (u8 *) tcp - (u8 *) ip4;
- n_advance_bytes = (ip_hdr_bytes + tcp_header_bytes (tcp));
- n_data_bytes = clib_net_to_host_u16 (ip4->length) - n_advance_bytes;
-
- /* Length check. Checksum computed by ipx_local no need to compute again */
- if (PREDICT_FALSE (n_data_bytes < 0))
- {
- *error = TCP_ERROR_LENGTH;
- return 0;
- }
-
- if (!is_nolookup)
- tc = session_lookup_connection_wt4 (fib_index, &ip4->dst_address,
- &ip4->src_address, tcp->dst_port,
- tcp->src_port,
- TRANSPORT_PROTO_TCP, thread_index,
- &result);
- }
- else
- {
- ip6_header_t *ip6 = vlib_buffer_get_current (b);
- if (PREDICT_FALSE (b->current_length < sizeof (*ip6) + sizeof (*tcp)))
- {
- *error = TCP_ERROR_LENGTH;
- return 0;
- }
- tcp = ip6_next_header (ip6);
- vnet_buffer (b)->tcp.hdr_offset = (u8 *) tcp - (u8 *) ip6;
- n_advance_bytes = tcp_header_bytes (tcp);
- n_data_bytes = clib_net_to_host_u16 (ip6->payload_length)
- - n_advance_bytes;
- n_advance_bytes += sizeof (ip6[0]);
-
- if (PREDICT_FALSE (n_data_bytes < 0))
- {
- *error = TCP_ERROR_LENGTH;
- return 0;
- }
-
- if (!is_nolookup)
- {
- if (PREDICT_FALSE
- (ip6_address_is_link_local_unicast (&ip6->dst_address)))
- {
- ip4_main_t *im = &ip4_main;
- fib_index = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (b)->sw_if_index[VLIB_RX]);
- }
-
- tc = session_lookup_connection_wt6 (fib_index, &ip6->dst_address,
- &ip6->src_address,
- tcp->dst_port, tcp->src_port,
- TRANSPORT_PROTO_TCP,
- thread_index, &result);
- }
- }
-
- if (is_nolookup)
- tc =
- (transport_connection_t *) tcp_connection_get (vnet_buffer (b)->
- tcp.connection_index,
- thread_index);
-
- vnet_buffer (b)->tcp.seq_number = clib_net_to_host_u32 (tcp->seq_number);
- vnet_buffer (b)->tcp.ack_number = clib_net_to_host_u32 (tcp->ack_number);
- vnet_buffer (b)->tcp.data_offset = n_advance_bytes;
- vnet_buffer (b)->tcp.data_len = n_data_bytes;
- vnet_buffer (b)->tcp.seq_end = vnet_buffer (b)->tcp.seq_number
- + n_data_bytes;
- vnet_buffer (b)->tcp.flags = 0;
-
- *error = result ? TCP_ERROR_NONE + result : *error;
-
- return tcp_get_connection_from_transport (tc);
-}
-
static inline void
tcp_input_dispatch_buffer (tcp_main_t * tm, tcp_connection_t * tc,
vlib_buffer_t * b, u16 * next,
if (PREDICT_FALSE (error != TCP_ERROR_NONE))
{
- /* Overload tcp flags to store state */
- tcp_state_t state = tc->state;
- vnet_buffer (b)->tcp.flags = tc->state;
-
b->error = error_node->errors[error];
if (error == TCP_ERROR_DISPATCH)
clib_warning ("tcp conn %u disp error state %U flags %U",
- tc->c_c_index, format_tcp_state, state,
+ tc->c_c_index, format_tcp_state, tc->state,
format_tcp_flags, (int) flags);
}
}
tcp_main_t *tm = vnet_get_tcp_main ();
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 nexts[VLIB_FRAME_SIZE], *next;
- vlib_node_runtime_t *error_node;
tcp_set_time_now (tcp_get_worker (thread_index));
- error_node = vlib_node_get_runtime (vm, tcp_node_index (input, is_ip4));
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
vlib_get_buffers (vm, from, bufs, n_left_from);
vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
vnet_buffer (b[1])->tcp.connection_index = tc1->c_c_index;
- tcp_input_dispatch_buffer (tm, tc0, b[0], &next[0], error_node);
- tcp_input_dispatch_buffer (tm, tc1, b[1], &next[1], error_node);
+ tcp_input_dispatch_buffer (tm, tc0, b[0], &next[0], node);
+ tcp_input_dispatch_buffer (tm, tc1, b[1], &next[1], node);
}
else
{
{
ASSERT (tcp_lookup_is_valid (tc0, b[0], tcp_buffer_hdr (b[0])));
vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
- tcp_input_dispatch_buffer (tm, tc0, b[0], &next[0], error_node);
+ tcp_input_dispatch_buffer (tm, tc0, b[0], &next[0], node);
}
else
{
tcp_input_set_error_next (tm, &next[0], &error0, is_ip4);
- b[0]->error = error_node->errors[error0];
+ b[0]->error = node->errors[error0];
}
if (PREDICT_TRUE (tc1 != 0))
{
ASSERT (tcp_lookup_is_valid (tc1, b[1], tcp_buffer_hdr (b[1])));
vnet_buffer (b[1])->tcp.connection_index = tc1->c_c_index;
- tcp_input_dispatch_buffer (tm, tc1, b[1], &next[1], error_node);
+ tcp_input_dispatch_buffer (tm, tc1, b[1], &next[1], node);
}
else
{
tcp_input_set_error_next (tm, &next[1], &error1, is_ip4);
- b[1]->error = error_node->errors[error1];
+ b[1]->error = node->errors[error1];
}
}
{
ASSERT (tcp_lookup_is_valid (tc0, b[0], tcp_buffer_hdr (b[0])));
vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
- tcp_input_dispatch_buffer (tm, tc0, b[0], &next[0], error_node);
+ tcp_input_dispatch_buffer (tm, tc0, b[0], &next[0], node);
}
else
{
tcp_input_set_error_next (tm, &next[0], &error0, is_ip4);
- b[0]->error = error_node->errors[error0];
+ b[0]->error = node->errors[error0];
}
b += 1;
Code Review / vpp.git / blobdiff