23 #define tcp_error(n,s) s, 29 #define foreach_tcp_state_next \ 30 _ (DROP4, "ip4-drop") \ 31 _ (DROP6, "ip6-drop") \ 32 _ (TCP4_OUTPUT, "tcp4-output") \ 33 _ (TCP6_OUTPUT, "tcp6-output") 35 typedef enum _tcp_established_next
37 #define _(s,n) TCP_ESTABLISHED_NEXT_##s, 43 typedef enum _tcp_rcv_process_next
45 #define _(s,n) TCP_RCV_PROCESS_NEXT_##s, 51 typedef enum _tcp_syn_sent_next
53 #define _(s,n) TCP_SYN_SENT_NEXT_##s, 59 typedef enum _tcp_listen_next
61 #define _(s,n) TCP_LISTEN_NEXT_##s, 68 typedef enum _tcp_state_next
70 #define _(s,n) TCP_NEXT_##s, 76 #define tcp_next_output(is_ip4) (is_ip4 ? TCP_NEXT_TCP4_OUTPUT \ 77 : TCP_NEXT_TCP6_OUTPUT) 79 #define tcp_next_drop(is_ip4) (is_ip4 ? TCP_NEXT_DROP4 \ 115 return (
seq_geq (end_seq, tc->rcv_las)
116 &&
seq_leq (seq, tc->rcv_nxt + tc->rcv_wnd));
131 u8 opt_len, opts_len, kind;
136 data = (
const u8 *) (th + 1);
139 to->
flags &= (TCP_OPTS_FLAG_SACK_PERMITTED | TCP_OPTS_FLAG_WSCALE
142 for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
162 if (opt_len < 2 || opt_len > opts_len)
174 to->
flags |= TCP_OPTS_FLAG_MSS;
175 to->
mss = clib_net_to_host_u16 (*(
u16 *) (data + 2));
183 to->
flags |= TCP_OPTS_FLAG_WSCALE;
191 to->
flags |= TCP_OPTS_FLAG_TSTAMP;
192 if ((to->
flags & TCP_OPTS_FLAG_TSTAMP)
195 to->
tsval = clib_net_to_host_u32 (*(
u32 *) (data + 2));
196 to->
tsecr = clib_net_to_host_u32 (*(
u32 *) (data + 6));
203 to->
flags |= TCP_OPTS_FLAG_SACK_PERMITTED;
207 if ((to->
flags & TCP_OPTS_FLAG_SACK_PERMITTED) == 0 ||
tcp_syn (th))
214 to->
flags |= TCP_OPTS_FLAG_SACK;
219 b.start = clib_net_to_host_u32 (*(
u32 *) (data + 2 + 8 * j));
220 b.end = clib_net_to_host_u32 (*(
u32 *) (data + 6 + 8 * j));
262 &&
seq_leq (tc->rcv_las, seq_end))
265 tc->tsval_recent = tc->rcv_opts.tsval;
287 *error0 = TCP_ERROR_CONNECTION_CLOSED;
293 *error0 = TCP_ERROR_SEGMENT_INVALID;
299 *error0 = TCP_ERROR_OPTIONS;
305 *error0 = TCP_ERROR_PAWS;
314 tc0->tsval_recent = tc0->rcv_opts.tsval;
333 *error0 = TCP_ERROR_RCV_WND;
336 if (!(tc0->rcv_wnd == 0
337 && tc0->rcv_nxt ==
vnet_buffer (b0)->tcp.seq_number))
353 *error0 = TCP_ERROR_RST_RCVD;
362 *error0 =
tcp_ack (th0) ? TCP_ERROR_SYN_ACKS_RCVD : TCP_ERROR_SYNS_RCVD;
364 if (tc0->state == TCP_STATE_SYN_RCVD)
411 err = mrtt - tc->srtt;
415 tc->srtt =
clib_max ((
int) tc->srtt + (err >> 3), 1);
416 diff = (
clib_abs (err) - (int) tc->rttvar) >> 2;
417 tc->rttvar =
clib_max ((
int) tc->rttvar + diff, 1);
423 tc->rttvar = mrtt >> 1;
459 if (tc->rtt_ts &&
seq_geq (ack, tc->rtt_seq))
462 tc->mrtt_us = tc->mrtt_us + (sample - tc->mrtt_us) * 0.125;
473 mrtt =
clib_max (now - tc->rcv_opts.tsecr, 1);
523 u32 *pending_deq_acked;
531 for (i = 0; i <
vec_len (pending_deq_acked); i++)
534 tc->flags &= ~TCP_CONN_DEQ_PENDING;
546 if (
seq_leq (tc->psh_seq, tc->snd_una))
547 tc->flags &= ~TCP_CONN_PSH_PENDING;
565 if (!(tc->flags & TCP_CONN_DEQ_PENDING))
568 tc->flags |= TCP_CONN_DEQ_PENDING;
570 tc->burst_acked += tc->bytes_acked + tc->sack_sb.snd_una_adv;
580 return ((
vnet_buffer (b)->tcp.ack_number == prev_snd_una)
581 &&
seq_gt (tc->snd_una_max, tc->snd_una)
583 && (prev_snd_wnd == tc->snd_wnd));
591 u32 prev_snd_wnd,
u32 prev_snd_una,
u8 * is_dack)
595 *is_dack = tc->sack_sb.last_sacked_bytes
605 return hole - sb->holes;
611 return hole->end - hole->start;
662 next->prev = hole->prev;
666 sb->tail = hole->prev;
672 prev->next = hole->next;
676 sb->head = hole->next;
706 hole->prev = prev_index;
707 hole->next = prev->next;
710 next->prev = hole_index;
712 sb->tail = hole_index;
714 prev->next = hole_index;
718 sb->head = hole_index;
730 u32 bytes = 0, blks = 0;
733 sb->sacked_bytes = 0;
738 if (
seq_gt (sb->high_sacked, left->end))
740 bytes = sb->high_sacked - left->end;
744 while ((right = left)
750 bytes += right->start - left->end;
763 bytes += right->start - left->end;
765 while ((right = left));
768 sb->sacked_bytes = bytes;
779 u8 have_unsent,
u8 * can_rescue,
u8 * snd_limited)
784 while (hole &&
seq_leq (hole->end, sb->high_rxt) && hole->is_lost)
795 if (hole->is_lost &&
seq_lt (hole->start, sb->high_sacked))
808 else if (
seq_lt (hole->start, sb->high_sacked))
824 if (hole &&
seq_lt (sb->high_rxt, hole->start))
825 sb->high_rxt = hole->start;
837 snd_una =
seq_gt (snd_una, hole->start) ? snd_una : hole->start;
838 sb->cur_rxt_hole = sb->head;
840 sb->high_rxt = snd_una;
841 sb->rescue_rxt = snd_una - 1;
862 sb->sacked_bytes = 0;
863 sb->last_sacked_bytes = 0;
864 sb->last_bytes_delivered = 0;
883 return (!hole || (
seq_geq (hole->start, tc->snd_una)
884 &&
seq_lt (hole->end, tc->snd_una_max)));
893 u32 blk_index = 0, old_sacked_bytes, hole_index;
896 sb->last_sacked_bytes = 0;
897 sb->last_bytes_delivered = 0;
904 old_sacked_bytes = sb->sacked_bytes;
907 blk = tc->rcv_opts.sacks;
908 while (blk <
vec_end (tc->rcv_opts.sacks))
910 if (
seq_lt (blk->start, blk->end)
911 &&
seq_gt (blk->start, tc->snd_una)
912 &&
seq_gt (blk->start, ack)
913 &&
seq_lt (blk->start, tc->snd_una_max)
914 &&
seq_leq (blk->end, tc->snd_una_max))
919 vec_del1 (tc->rcv_opts.sacks, blk - tc->rcv_opts.sacks);
923 if (
seq_gt (ack, tc->snd_una))
925 tmp.start = tc->snd_una;
930 if (
vec_len (tc->rcv_opts.sacks) == 0)
936 for (i = 0; i <
vec_len (tc->rcv_opts.sacks); i++)
937 for (j = i + 1; j <
vec_len (tc->rcv_opts.sacks); j++)
938 if (
seq_lt (tc->rcv_opts.sacks[j].start, tc->rcv_opts.sacks[i].start))
940 tmp = tc->rcv_opts.sacks[
i];
941 tc->rcv_opts.sacks[
i] = tc->rcv_opts.sacks[j];
942 tc->rcv_opts.sacks[j] = tmp;
949 tc->snd_una, tc->snd_una_max);
951 tmp = tc->rcv_opts.sacks[
vec_len (tc->rcv_opts.sacks) - 1];
952 sb->high_sacked = tmp.end;
958 tmp = tc->rcv_opts.sacks[
vec_len (tc->rcv_opts.sacks) - 1];
960 if (
seq_gt (tc->snd_una_max, last_hole->end))
962 if (
seq_geq (last_hole->start, sb->high_sacked))
964 last_hole->end = tc->snd_una_max;
967 else if (
seq_lt (sb->high_sacked, tc->snd_una_max))
975 if (
seq_gt (tmp.end, sb->high_sacked))
976 sb->high_sacked = tmp.end;
981 while (hole && blk_index < vec_len (tc->rcv_opts.sacks))
983 blk = &tc->rcv_opts.sacks[blk_index];
984 if (
seq_leq (blk->start, hole->start))
987 if (
seq_geq (blk->end, hole->end))
996 if (
seq_lt (ack, next_hole->start))
997 sb->snd_una_adv = next_hole->start - ack;
998 sb->last_bytes_delivered +=
999 next_hole->start - hole->end;
1004 sb->snd_una_adv = sb->high_sacked - ack;
1005 sb->last_bytes_delivered += sb->high_sacked - hole->end;
1015 if (
seq_gt (blk->end, hole->start))
1017 hole->start = blk->end;
1025 if (
seq_lt (blk->end, hole->end))
1033 hole->end = blk->start;
1037 else if (
seq_lt (blk->start, hole->end))
1039 hole->end = blk->start;
1048 if (hole->start == ack + sb->snd_una_adv
1049 && hole->end == tc->snd_una_max)
1054 sb->last_sacked_bytes = sb->sacked_bytes
1055 - (old_sacked_bytes - sb->last_bytes_delivered);
1058 || sb->sacked_bytes < tc->snd_una_max -
seq_max (tc->snd_una, ack));
1059 ASSERT (sb->last_sacked_bytes + sb->lost_bytes <= tc->snd_una_max
1062 || sb->holes[sb->head].start == ack + sb->snd_una_adv);
1077 if (
seq_lt (tc->snd_wl1, seq)
1078 || (tc->snd_wl1 == seq &&
seq_leq (tc->snd_wl2, ack)))
1080 tc->snd_wnd = snd_wnd;
1114 tc->snd_congestion = tc->snd_una_max;
1115 tc->cwnd_acc_bytes = 0;
1116 tc->snd_rxt_bytes = 0;
1117 tc->prev_ssthresh = tc->ssthresh;
1118 tc->prev_cwnd = tc->cwnd;
1119 tc->cc_algo->congestion (tc);
1129 tc->snd_nxt = tc->snd_una_max;
1138 tc->cc_algo->recovered (tc);
1139 tc->snd_rxt_bytes = 0;
1140 tc->rcv_dupacks = 0;
1141 tc->snd_nxt = tc->snd_una_max;
1142 tc->snd_rxt_bytes = 0;
1154 tc->cwnd = tc->prev_cwnd;
1155 tc->ssthresh = tc->prev_ssthresh;
1156 tc->snd_nxt = tc->snd_una_max;
1157 tc->rcv_dupacks = 0;
1162 ASSERT (tc->rto_boff == 0);
1179 && tc->cwnd > tc->ssthresh + 3 * tc->snd_mss);
1204 ASSERT (tc->rto_boff == 0);
1219 tc->rcv_dupacks = 0;
1226 (
seq_leq (tc->snd_congestion, tc->snd_una - tc->bytes_acked)
1227 &&
seq_gt (tc->snd_congestion, tc->snd_una)))
1228 tc->snd_congestion = tc->snd_una - 1;
1247 if (!(tc->flags & TCP_CONN_FRXT_PENDING))
1250 tc->flags |= TCP_CONN_FRXT_PENDING;
1257 u32 *ongoing_fast_rxt, burst_bytes, sent_bytes, thread_index;
1258 u32 max_burst_size, burst_size, n_segs = 0, n_segs_now;
1277 max_burst_size =
clib_max (max_burst_size, 1);
1279 for (i = 0; i <
vec_len (ongoing_fast_rxt); i++)
1288 tc->flags &= ~TCP_CONN_FRXT_PENDING;
1296 burst_size =
clib_min (burst_size, burst_bytes / tc->snd_mss);
1304 sent_bytes =
clib_min (n_segs_now * tc->snd_mss, burst_bytes);
1307 n_segs += n_segs_now;
1309 _vec_len (ongoing_fast_rxt) = 0;
1323 if (tc->bytes_acked)
1335 ASSERT (tc->snd_una != tc->snd_una_max
1336 || tc->sack_sb.last_sacked_bytes);
1355 if (is_dack && tc->snd_una == tc->snd_congestion
1358 tc->rcv_dupacks = 0;
1367 tc->cwnd = tc->ssthresh;
1375 tc->cwnd = tc->ssthresh + 3 * tc->snd_mss;
1379 pacer_wnd =
clib_max (0.1 * tc->cwnd, 2 * tc->snd_mss);
1386 else if (!tc->bytes_acked
1408 if (
seq_leq (tc->snd_una, tc->snd_congestion)
1409 && ((!(tc->cwnd > tc->snd_mss
1410 && tc->bytes_acked <= 4 * tc->snd_mss))
1411 || (tc->rcv_opts.tsecr != tc->tsecr_last_ack)))
1413 tc->rcv_dupacks = 0;
1418 if (!tc->bytes_acked)
1432 if (
seq_geq (tc->snd_una, tc->snd_congestion))
1439 tc->tsecr_last_ack = tc->rcv_opts.tsecr;
1443 tc->snd_nxt = tc->snd_una_max;
1459 tc->rcv_dupacks = 0;
1472 ASSERT (tc->bytes_acked + tc->sack_sb.snd_una_adv
1473 >= tc->sack_sb.last_bytes_delivered
1474 || (tc->flags & TCP_CONN_FINSNT));
1478 if (
seq_lt (tc->snd_una, tc->sack_sb.high_rxt))
1480 rxt_delivered = tc->bytes_acked + tc->sack_sb.snd_una_adv
1481 - tc->sack_sb.last_bytes_delivered;
1482 ASSERT (tc->snd_rxt_bytes >= rxt_delivered);
1483 tc->snd_rxt_bytes -= rxt_delivered;
1488 tc->snd_rxt_bytes = 0;
1489 tc->sack_sb.high_rxt = tc->snd_una;
1496 tc->sack_sb.last_bytes_delivered += tc->bytes_acked;
1497 if (tc->snd_rxt_bytes > tc->bytes_acked)
1498 tc->snd_rxt_bytes -= tc->bytes_acked;
1500 tc->snd_rxt_bytes = 0;
1518 u32 prev_snd_wnd, prev_snd_una;
1530 tc->snd_una + tc->snd_wnd))
1533 if (
seq_gt (tc->snd_nxt, tc->snd_una_max))
1534 tc->snd_una_max = tc->snd_nxt;
1544 *error = TCP_ERROR_ACK_FUTURE;
1554 if (
seq_gt (tc->snd_nxt, tc->snd_una_max))
1555 tc->snd_una_max = tc->snd_nxt;
1563 *error = TCP_ERROR_ACK_OLD;
1579 prev_snd_wnd = tc->snd_wnd;
1580 prev_snd_una = tc->snd_una;
1583 clib_net_to_host_u16 (th->window) << tc->snd_wscale);
1584 tc->bytes_acked =
vnet_buffer (b)->tcp.ack_number - tc->snd_una;
1585 tc->snd_una =
vnet_buffer (b)->tcp.ack_number + tc->sack_sb.snd_una_adv;
1588 if (tc->bytes_acked)
1605 *error = TCP_ERROR_ACK_OK;
1608 *error = TCP_ERROR_ACK_DUP;
1618 *error = TCP_ERROR_ACK_OK;
1635 u32 thread_index, *pending_disconnects;
1644 for (i = 0; i <
vec_len (pending_disconnects); i++)
1666 *error = TCP_ERROR_FIN_RCVD;
1673 for (i = 1; i <
vec_len (sacks); i++)
1675 if (sacks[i - 1].end == sacks[i].start)
1700 if (
seq_lt (tc->rcv_nxt, start))
1703 block->start = start;
1708 for (i = 0; i <
vec_len (tc->snd_sacks); i++)
1711 if (
seq_leq (tc->snd_sacks[i].start, tc->rcv_nxt))
1715 if (block && (
seq_geq (tc->snd_sacks[i].end, new_list[0].start)
1716 &&
seq_leq (tc->snd_sacks[i].start, new_list[0].end)))
1718 if (
seq_lt (tc->snd_sacks[i].start, new_list[0].start))
1719 new_list[0].start = tc->snd_sacks[i].start;
1720 if (
seq_lt (new_list[0].end, tc->snd_sacks[i].end))
1721 new_list[0].end = tc->snd_sacks[i].end;
1728 vec_add1 (new_list, tc->snd_sacks[i]);
1740 tc->snd_sacks = new_list;
1750 for (
i = 0;
i <
vec_len (tc->snd_sacks);
i++)
1751 bytes += tc->snd_sacks[
i].end - tc->snd_sacks[
i].start;
1760 int written, error = TCP_ERROR_ENQUEUED;
1767 TCP_EVT_DBG (TCP_EVT_INPUT, tc, 0, data_len, written);
1772 tc->rcv_nxt += written;
1775 else if (written > data_len)
1777 tc->rcv_nxt += written;
1778 TCP_EVT_DBG (TCP_EVT_CC_INPUT, tc, data_len, written);
1780 else if (written > 0)
1783 tc->rcv_nxt += written;
1784 error = TCP_ERROR_PARTIALLY_ENQUEUED;
1788 return TCP_ERROR_FIFO_FULL;
1822 return TCP_ERROR_FIFO_FULL;
1825 TCP_EVT_DBG (TCP_EVT_INPUT, tc, 1, data_len, data_len);
1833 s0 =
session_get (tc->c_s_index, tc->c_thread_index);
1841 start = tc->rcv_nxt +
offset;
1849 return TCP_ERROR_ENQUEUED_OOO;
1862 || (tc->flags & TCP_CONN_SENT_RCV_WND0) != 0
1864 || (tc->flags & TCP_CONN_SNDACK) != 0
1881 if (!(b->
flags & VLIB_BUFFER_NEXT_PRESENT))
1888 n_bytes_to_drop -= discard;
1890 while (n_bytes_to_drop);
1891 if (n_bytes_to_drop > first)
1909 u32 error, n_bytes_to_drop, n_data_bytes;
1927 error = TCP_ERROR_SEGMENT_OLD;
1933 n_bytes_to_drop = tc->rcv_nxt -
vnet_buffer (b)->tcp.seq_number;
1934 n_data_bytes -= n_bytes_to_drop;
1938 error = TCP_ERROR_SEGMENT_OLD;
1983 s =
format (s,
"%U\n%U%U",
1998 s =
format (s,
"%d -> %d (%U)",
1999 clib_net_to_host_u16 (t->
tcp_header.dst_port),
2042 if (b0->
flags & VLIB_BUFFER_IS_TRACED)
2066 #define tcp_maybe_inc_counter(node_id, err, count) \ 2068 if (next0 != tcp_next_drop (is_ip4)) \ 2069 tcp_node_inc_counter_i (vm, tcp4_##node_id##_node.index, \ 2070 tcp6_##node_id##_node.index, is_ip4, err, \ 2073 #define tcp_inc_counter(node_id, err, count) \ 2074 tcp_node_inc_counter_i (vm, tcp4_##node_id##_node.index, \ 2075 tcp6_##node_id##_node.index, is_ip4, \ 2077 #define tcp_maybe_inc_err_counter(cnts, err) \ 2079 cnts[err] += (next0 != tcp_next_drop (is_ip4)); \ 2081 #define tcp_inc_err_counter(cnts, err, val) \ 2085 #define tcp_store_err_counters(node_id, cnts) \ 2088 for (i = 0; i < TCP_N_ERROR; i++) \ 2090 tcp_inc_counter(node_id, i, cnts[i]); \ 2100 u32 n_left_from, *from, *first_buffer;
2109 while (n_left_from > 0)
2111 u32 bi0, error0 = TCP_ERROR_ACK_OK;
2116 if (n_left_from > 1)
2134 error0 = TCP_ERROR_INVALID_CONNECTION;
2169 err_counters[TCP_ERROR_MSG_QUEUE_FULL] = errors;
2196 .name =
"tcp4-established",
2198 .vector_size =
sizeof (
u32),
2204 #define _(s,n) [TCP_ESTABLISHED_NEXT_##s] = n, 2218 .name =
"tcp6-established",
2220 .vector_size =
sizeof (
u32),
2226 #define _(s,n) [TCP_ESTABLISHED_NEXT_##s] = n, 2250 if (tc->c_lcl_port == 0 && tc->state == TCP_STATE_LISTEN)
2253 u8 is_valid = (tc->c_lcl_port == hdr->dst_port
2254 && (tc->state == TCP_STATE_LISTEN
2255 || tc->c_rmt_port == hdr->src_port));
2261 tc->c_proto, tc->c_is_ip4);
2265 if (tmp->lcl_port == hdr->dst_port
2266 && tmp->rmt_port == hdr->src_port)
2268 TCP_DBG (
"half-open is valid!");
2297 thread_index, &is_filtered);
2312 thread_index, &is_filtered);
2324 u32 n_left_from, *from, *first_buffer, errors = 0;
2331 while (n_left_from > 0)
2333 u32 bi0, ack0, seq0, error0 = TCP_ERROR_NONE;
2348 error0 = TCP_ERROR_INVALID_CONNECTION;
2358 my_thread_index, is_ip4));
2369 || tcp0->src_port != tc0->c_rmt_port))
2371 error0 = TCP_ERROR_INVALID_CONNECTION;
2378 error0 = TCP_ERROR_SEGMENT_INVALID;
2399 if (
seq_leq (ack0, tc0->iss) ||
seq_gt (ack0, tc0->snd_nxt))
2403 error0 = TCP_ERROR_RCV_WND;
2408 if (
seq_gt (tc0->snd_una, ack0))
2410 error0 = TCP_ERROR_ACK_INVALID;
2425 error0 = TCP_ERROR_RST_RCVD;
2441 error0 = TCP_ERROR_SEGMENT_INVALID;
2449 error0 = TCP_ERROR_OPTIONS;
2455 pool_get (tm->connections[my_thread_index], new_tc0);
2457 new_tc0->c_c_index = new_tc0 - tm->connections[my_thread_index];
2458 new_tc0->c_thread_index = my_thread_index;
2460 new_tc0->irs = seq0;
2468 tc0->flags |= TCP_CONN_HALF_OPEN_DONE;
2472 new_tc0->tsval_recent = new_tc0->rcv_opts.tsval;
2477 new_tc0->snd_wscale = new_tc0->rcv_opts.wscale;
2479 new_tc0->rcv_wscale = 0;
2481 new_tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
2482 << new_tc0->snd_wscale;
2483 new_tc0->snd_wl1 = seq0;
2484 new_tc0->snd_wl2 = ack0;
2494 new_tc0->snd_una = ack0;
2495 new_tc0->state = TCP_STATE_ESTABLISHED;
2498 new_tc0->rcv_las = new_tc0->rcv_nxt;
2510 new_tc0->tx_fifo_size =
2515 error0 = TCP_ERROR_SYN_ACKS_RCVD;
2520 new_tc0->state = TCP_STATE_SYN_RCVD;
2531 new_tc0->tx_fifo_size =
2533 new_tc0->rtt_ts = 0;
2536 error0 = TCP_ERROR_SYNS_RCVD;
2545 if (error0 == TCP_ERROR_ACK_OK)
2546 error0 = TCP_ERROR_SYN_ACKS_RCVD;
2591 .name =
"tcp4-syn-sent",
2593 .vector_size =
sizeof (
u32),
2599 #define _(s,n) [TCP_SYN_SENT_NEXT_##s] = n, 2613 .name =
"tcp6-syn-sent",
2615 .vector_size =
sizeof (
u32),
2621 #define _(s,n) [TCP_SYN_SENT_NEXT_##s] = n, 2644 u32 n_left_from, *from, max_dequeue;
2649 while (n_left_from > 0)
2651 u32 bi0, error0 = TCP_ERROR_NONE;
2666 error0 = TCP_ERROR_INVALID_CONNECTION;
2678 if (tmp->state != tc0->state)
2680 if (tc0->state != TCP_STATE_CLOSED)
2691 error0 = TCP_ERROR_CONNECTION_CLOSED;
2706 case TCP_STATE_SYN_RCVD:
2716 error0 = TCP_ERROR_ACK_INVALID;
2721 if (tc0->rcv_nxt !=
vnet_buffer (b0)->tcp.seq_number || is_fin0)
2724 error0 = TCP_ERROR_SEGMENT_INVALID;
2732 tc0->state = TCP_STATE_ESTABLISHED;
2737 tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
2738 << tc0->rcv_opts.wscale;
2747 error0 = TCP_ERROR_MSG_QUEUE_FULL;
2751 error0 = TCP_ERROR_ACK_OK;
2753 case TCP_STATE_ESTABLISHED:
2760 case TCP_STATE_FIN_WAIT_1:
2768 if (tc0->flags & TCP_CONN_FINPNDG)
2772 if (max_dequeue <= tc0->burst_acked)
2776 else if (tc0->snd_una == tc0->snd_una_max)
2787 if (tc0->burst_acked > 1)
2789 tc0->burst_acked - 1);
2790 tc0->burst_acked = 0;
2793 case TCP_STATE_FIN_WAIT_2:
2799 tc0->burst_acked = 0;
2801 case TCP_STATE_CLOSE_WAIT:
2806 if (tc0->flags & TCP_CONN_FINPNDG)
2818 case TCP_STATE_CLOSING:
2831 case TCP_STATE_LAST_ACK:
2838 error0 = TCP_ERROR_ACK_INVALID;
2841 error0 = TCP_ERROR_ACK_OK;
2844 if (is_fin0 && tc0->snd_una != tc0->snd_una_max)
2861 case TCP_STATE_TIME_WAIT:
2883 case TCP_STATE_ESTABLISHED:
2884 case TCP_STATE_FIN_WAIT_1:
2885 case TCP_STATE_FIN_WAIT_2:
2889 case TCP_STATE_CLOSE_WAIT:
2890 case TCP_STATE_CLOSING:
2891 case TCP_STATE_LAST_ACK:
2892 case TCP_STATE_TIME_WAIT:
2906 case TCP_STATE_ESTABLISHED:
2914 case TCP_STATE_SYN_RCVD:
2924 case TCP_STATE_CLOSE_WAIT:
2925 case TCP_STATE_CLOSING:
2926 case TCP_STATE_LAST_ACK:
2929 case TCP_STATE_FIN_WAIT_1:
2936 case TCP_STATE_FIN_WAIT_2:
2944 case TCP_STATE_TIME_WAIT:
2951 error0 = TCP_ERROR_FIN_RCVD;
2990 .name =
"tcp4-rcv-process",
2992 .vector_size =
sizeof (
u32),
2998 #define _(s,n) [TCP_RCV_PROCESS_NEXT_##s] = n, 3012 .name =
"tcp6-rcv-process",
3014 .vector_size =
sizeof (
u32),
3020 #define _(s,n) [TCP_RCV_PROCESS_NEXT_##s] = n, 3040 u32 n_left_from, *from, n_syns = 0, *first_buffer;
3046 while (n_left_from > 0)
3056 u32 error0 = TCP_ERROR_NONE;
3098 error0 = TCP_ERROR_CREATE_EXISTS;
3104 child0->c_lcl_port = th0->dst_port;
3105 child0->c_rmt_port = th0->src_port;
3106 child0->c_is_ip4 = is_ip4;
3107 child0->state = TCP_STATE_SYN_RCVD;
3108 child0->c_fib_index = lc0->c_fib_index;
3125 error0 = TCP_ERROR_OPTIONS;
3131 child0->rcv_nxt =
vnet_buffer (b0)->tcp.seq_number + 1;
3132 child0->rcv_las = child0->rcv_nxt;
3139 child0->tsval_recent = child0->rcv_opts.tsval;
3144 child0->snd_wscale = child0->rcv_opts.wscale;
3146 child0->snd_wnd = clib_net_to_host_u16 (th0->window)
3147 << child0->snd_wscale;
3148 child0->snd_wl1 =
vnet_buffer (b0)->tcp.seq_number;
3149 child0->snd_wl2 =
vnet_buffer (b0)->tcp.ack_number;
3159 error0 = TCP_ERROR_CREATE_SESSION_FAIL;
3177 n_syns += (error0 == TCP_ERROR_NONE);
3204 .name =
"tcp4-listen",
3206 .vector_size =
sizeof (
u32),
3212 #define _(s,n) [TCP_LISTEN_NEXT_##s] = n, 3226 .name =
"tcp6-listen",
3228 .vector_size =
sizeof (
u32),
3234 #define _(s,n) [TCP_LISTEN_NEXT_##s] = n, 3247 typedef enum _tcp_input_next
3259 #define foreach_tcp4_input_next \ 3260 _ (DROP, "ip4-drop") \ 3261 _ (LISTEN, "tcp4-listen") \ 3262 _ (RCV_PROCESS, "tcp4-rcv-process") \ 3263 _ (SYN_SENT, "tcp4-syn-sent") \ 3264 _ (ESTABLISHED, "tcp4-established") \ 3265 _ (RESET, "tcp4-reset") \ 3266 _ (PUNT, "ip4-punt") 3268 #define foreach_tcp6_input_next \ 3269 _ (DROP, "ip6-drop") \ 3270 _ (LISTEN, "tcp6-listen") \ 3271 _ (RCV_PROCESS, "tcp6-rcv-process") \ 3272 _ (SYN_SENT, "tcp6-syn-sent") \ 3273 _ (ESTABLISHED, "tcp6-established") \ 3274 _ (RESET, "tcp6-reset") \ 3275 _ (PUNT, "ip6-punt") 3277 #define filter_flags (TCP_FLAG_SYN|TCP_FLAG_ACK|TCP_FLAG_RST|TCP_FLAG_FIN) 3288 for (i = 0; i < n_bufs; i++)
3290 if (bs[i]->
flags & VLIB_BUFFER_IS_TRACED)
3304 if (*error == TCP_ERROR_FILTERED || *error == TCP_ERROR_WRONG_THREAD)
3308 else if ((is_ip4 && tm->punt_unknown4) || (!is_ip4 && tm->punt_unknown6))
3311 *error = TCP_ERROR_PUNT;
3316 *error = TCP_ERROR_NO_LISTENER;
3325 int n_advance_bytes, n_data_bytes;
3336 *error = TCP_ERROR_LENGTH;
3342 n_data_bytes = clib_net_to_host_u16 (ip4->
length) - n_advance_bytes;
3347 *error = TCP_ERROR_LENGTH;
3354 thread_index, &result);
3361 *error = TCP_ERROR_LENGTH;
3369 n_advance_bytes +=
sizeof (ip6[0]);
3373 *error = TCP_ERROR_LENGTH;
3380 thread_index, &result);
3383 vnet_buffer (b)->tcp.seq_number = clib_net_to_host_u32 (tcp->seq_number);
3384 vnet_buffer (b)->tcp.ack_number = clib_net_to_host_u32 (tcp->ack_number);
3385 vnet_buffer (b)->tcp.data_offset = n_advance_bytes;
3391 *error = result ? TCP_ERROR_NONE + result : *error;
3405 *next = tm->dispatch_table[tc->state][
flags].next;
3406 *error = tm->dispatch_table[tc->state][
flags].error;
3415 if (*error == TCP_ERROR_DISPATCH)
3416 clib_warning (
"tcp conn %u disp error state %U flags %U",
3440 while (n_left_from >= 4)
3442 u32 error0 = TCP_ERROR_NO_LISTENER, error1 = TCP_ERROR_NO_LISTENER;
3463 vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
3464 vnet_buffer (b[1])->tcp.connection_index = tc1->c_c_index;
3474 vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
3483 vnet_buffer (b[1])->tcp.connection_index = tc1->c_c_index;
3494 while (n_left_from > 0)
3497 u32 error0 = TCP_ERROR_NO_LISTENER;
3499 if (n_left_from > 1)
3510 vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
3546 .name =
"tcp4-input",
3548 .vector_size =
sizeof (
u32),
3554 #define _(s,n) [TCP_INPUT_NEXT_##s] = n, 3569 .name =
"tcp6-input",
3571 .vector_size =
sizeof (
u32),
3577 #define _(s,n) [TCP_INPUT_NEXT_##s] = n, 3592 for (i = 0; i <
ARRAY_LEN (tm->dispatch_table); i++)
3593 for (j = 0; j <
ARRAY_LEN (tm->dispatch_table[i]); j++)
3596 tm->dispatch_table[
i][j].error = TCP_ERROR_DISPATCH;
3599 #define _(t,f,n,e) \ 3601 tm->dispatch_table[TCP_STATE_##t][f].next = (n); \ 3602 tm->dispatch_table[TCP_STATE_##t][f].error = (e); \ 3611 TCP_ERROR_ACK_INVALID);
3613 TCP_ERROR_SEGMENT_INVALID);
3615 TCP_ERROR_SEGMENT_INVALID);
3617 TCP_ERROR_INVALID_CONNECTION);
3620 TCP_ERROR_SEGMENT_INVALID);
3622 TCP_ERROR_SEGMENT_INVALID);
3626 TCP_ERROR_SEGMENT_INVALID);
3628 TCP_ERROR_SEGMENT_INVALID);
3630 TCP_ERROR_SEGMENT_INVALID);
3805 TCP_ERROR_CONNECTION_CLOSED);
#define tcp_in_cong_recovery(tc)
int stream_session_accept_notify(transport_connection_t *tc)
u32 * pending_disconnects
vector of pending disconnect notifications
#define tcp_in_recovery(tc)
static f64 tcp_time_now_us(u32 thread_index)
#define TCP_OPTION_LEN_SACK_PERMITTED
#define seq_leq(_s1, _s2)
struct _sack_block sack_block_t
static void vlib_buffer_free(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Free buffers Frees the entire buffer chain for each buffer.
#define timestamp_leq(_t1, _t2)
transport_connection_t * session_lookup_connection_wt6(u32 fib_index, ip6_address_t *lcl, ip6_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 thread_index, u8 *result)
Lookup connection with ip6 and transport layer information.
struct _transport_connection transport_connection_t
#define TCP_TIMEWAIT_TIME
#define tcp_opts_tstamp(_to)
#define clib_memcpy_fast(a, b, c)
struct _sack_scoreboard sack_scoreboard_t
static tcp_connection_t * tcp_half_open_connection_get(u32 conn_index)
struct _tcp_main tcp_main_t
void tcp_connection_timers_reset(tcp_connection_t *tc)
Stop all connection timers.
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
#define tcp_recovery_off(tc)
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
#define THZ
TCP tick frequency.
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
struct _tcp_connection tcp_connection_t
static u32 tcp_available_cc_snd_space(const tcp_connection_t *tc)
Estimate of how many bytes we can still push into the network.
#define tcp_opts_sack(_to)
tcp_connection_t tcp_connection
static tcp_connection_t * tcp_get_connection_from_transport(transport_connection_t *tconn)
#define tcp_disconnect_pending_on(tc)
int session_enqueue_stream_connection(transport_connection_t *tc, vlib_buffer_t *b, u32 offset, u8 queue_event, u8 is_in_order)
u64 session_lookup_half_open_handle(transport_connection_t *tc)
static void tcp_cc_rcv_ack(tcp_connection_t *tc)
format_function_t format_tcp_flags
u32 * ongoing_fast_rxt
vector of connections now doing fast rxt
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
u8 n_sack_blocks
Number of SACKs blocks.
struct _tcp_header tcp_header_t
int tcp_half_open_connection_cleanup(tcp_connection_t *tc)
Try to cleanup half-open connection.
u32 * pending_deq_acked
vector of pending ack dequeues
struct _sack_scoreboard_hole sack_scoreboard_hole_t
u8 wscale
Window scale advertised.
u32 transport_connection_tx_pacer_burst(transport_connection_t *tc, u64 time_now)
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
#define tcp_fastrecovery_on(tc)
void session_transport_closing_notify(transport_connection_t *tc)
Notification from transport that connection is being closed.
#define TCP_TICK
TCP tick period (s)
static void tcp_connection_set_state(tcp_connection_t *tc, tcp_state_t state)
void tcp_init_snd_vars(tcp_connection_t *tc)
Initialize connection send variables.
#define VLIB_INIT_FUNCTION(x)
#define TCP_CLOSEWAIT_TIME
#define TCP_OPTION_LEN_SACK_BLOCK
transport_connection_t * session_lookup_connection_wt4(u32 fib_index, ip4_address_t *lcl, ip4_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 thread_index, u8 *result)
Lookup connection with ip4 and transport layer information.
static tcp_header_t * tcp_buffer_hdr(vlib_buffer_t *b)
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
enum _tcp_state tcp_state_t
#define TCP_ALWAYS_ACK
On/off delayed acks.
vhost_vring_state_t state
static u32 ooo_segment_length(svm_fifo_t *f, ooo_segment_t *s)
static void * ip4_next_header(ip4_header_t *i)
static u32 tcp_time_now(void)
sack_block_t * sacks
SACK blocks.
#define vec_end(v)
End (last data address) of vector.
struct _stream_session_t stream_session_t
#define vlib_call_init_function(vm, x)
#define TCP_MAX_SACK_BLOCKS
Max number of SACK blocks stored.
#define tcp_validate_txf_size(_tc, _a)
#define TCP_EVT_DBG(_evt, _args...)
#define timestamp_lt(_t1, _t2)
static void tcp_timer_set(tcp_connection_t *tc, u8 timer_id, u32 interval)
#define TCP_OPTION_LEN_WINDOW_SCALE
static void svm_fifo_newest_ooo_segment_reset(svm_fifo_t *f)
static heap_elt_t * first(heap_header_t *h)
u32 stream_session_dequeue_drop(transport_connection_t *tc, u32 max_bytes)
vlib_main_t * vm
convenience pointer to this thread's vlib main
#define TCP_INVALID_SACK_HOLE_INDEX
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
u32 * postponed_fast_rxt
vector of connections that will do fast rxt
u16 current_length
Nbytes between current data and the end of this buffer.
#define tcp_in_fastrecovery(tc)
void tcp_connection_tx_pacer_reset(tcp_connection_t *tc, u32 window, u32 start_bucket)
tcp_connection_t * tcp_connection_alloc(u8 thread_index)
static u32 ooo_segment_offset(svm_fifo_t *f, ooo_segment_t *s)
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
void tcp_connection_tx_pacer_update(tcp_connection_t *tc)
#define pool_put(P, E)
Free an object E in pool P.
#define TCP_TIMER_HANDLE_INVALID
#define vec_del1(v, i)
Delete the element at index I.
int stream_session_accept(transport_connection_t *tc, u32 listener_index, u8 notify)
Accept a stream session.
#define TCP_OPTION_LEN_TIMESTAMP
static ooo_segment_t * svm_fifo_newest_ooo_segment(svm_fifo_t *f)
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
static stream_session_t * session_get(u32 si, u32 thread_index)
#define TCP_DBG(_fmt, _args...)
#define TCP_MAX_WND_SCALE
static void tcp_timer_reset(tcp_connection_t *tc, u8 timer_id)
void tcp_connection_free(tcp_connection_t *tc)
#define VLIB_REGISTER_NODE(x,...)
#define CLIB_PREFETCH(addr, size, type)
static_always_inline void vlib_buffer_enqueue_to_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 *nexts, uword count)
void tcp_send_reset(tcp_connection_t *tc)
Build and set reset packet for connection.
#define vec_free(V)
Free vector's memory (no header).
#define TCP_DUPACK_THRESHOLD
format_function_t format_tcp_state
void tcp_program_ack(tcp_worker_ctx_t *wrk, tcp_connection_t *tc)
#define clib_warning(format, args...)
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
u16 mss
Option flags, see above.
static void * ip6_next_header(ip6_header_t *i)
void tcp_send_synack(tcp_connection_t *tc)
static void tcp_timer_update(tcp_connection_t *tc, u8 timer_id, u32 interval)
#define TCP_PAWS_IDLE
24 days
u32 session_tx_fifo_max_dequeue(transport_connection_t *tc)
#define tcp_fastrecovery_first_on(tc)
#define seq_geq(_s1, _s2)
u32 next_buffer
Next buffer for this linked-list of buffers.
static void transport_add_tx_event(transport_connection_t *tc)
#define vec_append(v1, v2)
Append v2 after v1.
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
#define tcp_fastrecovery_first_off(tc)
static vlib_main_t * vlib_get_main(void)
static u32 tcp_time_now_w_thread(u32 thread_index)
static clib_error_t * tcp_init(vlib_main_t *vm)
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
void transport_connection_tx_pacer_update_bytes(transport_connection_t *tc, u32 bytes)
u32 total_length_not_including_first_buffer
Only valid for first buffer in chain.
struct _vlib_node_registration vlib_node_registration_t
#define tcp_opts_wscale(_to)
void tcp_send_reset_w_pkt(tcp_connection_t *tc, vlib_buffer_t *pkt, u32 thread_index, u8 is_ip4)
Send reset without reusing existing buffer.
void tcp_connection_reset(tcp_connection_t *tc)
Notify session that connection has been reset.
u32 tsval
Timestamp value.
u32 tsecr
Echoed/reflected time stamp.
void tcp_send_fin(tcp_connection_t *tc)
Send FIN.
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static u8 tcp_is_lost_fin(tcp_connection_t *tc)
static tcp_worker_ctx_t * tcp_get_worker(u32 thread_index)
static void tcp_retransmit_timer_update(tcp_connection_t *tc)
#define seq_max(_s1, _s2)
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
void tcp_connection_init_vars(tcp_connection_t *tc)
Initialize tcp connection variables.
int tcp_fast_retransmit(tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
Do fast retransmit.
#define TCP_OPTION_LEN_MSS
#define tcp_disconnect_pending(tc)
struct clib_bihash_value offset
template key/value backing page structure
#define tcp_scoreboard_trace_add(_tc, _ack)
u8 * format_tcp_connection(u8 *s, va_list *args)
int session_manager_flush_enqueue_events(u8 transport_proto, u32 thread_index)
Flushes queue of sessions that are to be notified of new data enqueued events.
static tcp_connection_t * tcp_connection_get(u32 conn_index, u32 thread_index)
static int tcp_header_bytes(tcp_header_t *t)
int session_stream_connect_notify(transport_connection_t *tc, u8 is_fail)
#define tcp_disconnect_pending_off(tc)
static u32 vlib_num_workers()
void tcp_connection_cleanup(tcp_connection_t *tc)
Cleans up connection state.
u32 * pending_fast_rxt
vector of connections needing fast rxt
u16 flags
Copy of main node flags.
#define tcp_opts_sack_permitted(_to)
static int ip4_header_bytes(const ip4_header_t *i)
static_always_inline void vlib_get_buffers(vlib_main_t *vm, u32 *bi, vlib_buffer_t **b, int count)
Translate array of buffer indices into buffer pointers.
#define VLIB_NODE_FLAG_TRACE
#define CLIB_CACHE_LINE_BYTES
#define TCP_SYN_RCVD_TIME
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
static void tcp_persist_timer_set(tcp_connection_t *tc)
static tcp_main_t * vnet_get_tcp_main()
#define tcp_fastrecovery_off(tc)
static void tcp_retransmit_timer_reset(tcp_connection_t *tc)
void tcp_program_dupack(tcp_worker_ctx_t *wrk, tcp_connection_t *tc)
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
static u32 tcp_set_time_now(tcp_worker_ctx_t *wrk)
static u32 transport_tx_fifo_size(transport_connection_t *tc)
static u8 tcp_timer_is_active(tcp_connection_t *tc, tcp_timers_e timer)
transport_connection_t * session_lookup_half_open_connection(u64 handle, u8 proto, u8 is_ip4)
static tcp_connection_t * tcp_listener_get(u32 tli)
static void tcp_persist_timer_reset(tcp_connection_t *tc)
static uword pool_elts(void *v)
Number of active elements in a pool.