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 \ 112 return (
seq_geq (end_seq, tc->rcv_las)
113 &&
seq_leq (seq, tc->rcv_nxt + tc->rcv_wnd));
128 u8 opt_len, opts_len, kind;
133 data = (
const u8 *) (th + 1);
136 to->
flags &= (TCP_OPTS_FLAG_SACK_PERMITTED | TCP_OPTS_FLAG_WSCALE
139 for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
159 if (opt_len < 2 || opt_len > opts_len)
171 to->
flags |= TCP_OPTS_FLAG_MSS;
172 to->
mss = clib_net_to_host_u16 (*(
u16 *) (data + 2));
180 to->
flags |= TCP_OPTS_FLAG_WSCALE;
188 to->
flags |= TCP_OPTS_FLAG_TSTAMP;
189 if ((to->
flags & TCP_OPTS_FLAG_TSTAMP)
192 to->
tsval = clib_net_to_host_u32 (*(
u32 *) (data + 2));
193 to->
tsecr = clib_net_to_host_u32 (*(
u32 *) (data + 6));
200 to->
flags |= TCP_OPTS_FLAG_SACK_PERMITTED;
204 if ((to->
flags & TCP_OPTS_FLAG_SACK_PERMITTED) == 0 ||
tcp_syn (th))
211 to->
flags |= TCP_OPTS_FLAG_SACK;
216 b.start = clib_net_to_host_u32 (*(
u32 *) (data + 2 + 8 * j));
217 b.end = clib_net_to_host_u32 (*(
u32 *) (data + 6 + 8 * j));
259 &&
seq_leq (tc->rcv_las, seq_end))
262 tc->tsval_recent = tc->rcv_opts.tsval;
284 *error0 = TCP_ERROR_CONNECTION_CLOSED;
290 *error0 = TCP_ERROR_SEGMENT_INVALID;
296 *error0 = TCP_ERROR_OPTIONS;
302 *error0 = TCP_ERROR_PAWS;
311 tc0->tsval_recent = tc0->rcv_opts.tsval;
332 &&
vnet_buffer (b0)->tcp.seq_number == tc0->rcv_nxt - 1)
335 if (tc0->state == TCP_STATE_SYN_RCVD)
339 *error0 = TCP_ERROR_SYNS_RCVD;
345 *error0 = TCP_ERROR_SYN_ACKS_RCVD;
352 if (tc0->rcv_wnd < tc0->snd_mss
353 && tc0->rcv_nxt ==
vnet_buffer (b0)->tcp.seq_number)
361 tc0->rcv_las - tc0->rcv_wnd)
363 tc0->rcv_nxt + tc0->rcv_wnd))
366 *error0 = TCP_ERROR_RCV_WND;
387 *error0 = TCP_ERROR_RST_RCVD;
398 *error0 = TCP_ERROR_SPURIOUS_SYN;
424 *error = TCP_ERROR_ACK_INVALID;
429 tc->bytes_acked =
vnet_buffer (b)->tcp.ack_number - tc->snd_una;
431 *error = TCP_ERROR_ACK_OK;
451 err = mrtt - tc->srtt;
455 tc->srtt =
clib_max ((
int) tc->srtt + (err >> 3), 1);
456 diff = (
clib_abs (err) - (int) tc->rttvar) >> 2;
457 tc->rttvar =
clib_max ((
int) tc->rttvar + diff, 1);
463 tc->rttvar = mrtt >> 1;
467 #ifndef CLIB_MARCH_VARIANT 501 if (tc->rtt_ts &&
seq_geq (ack, tc->rtt_seq))
504 tc->mrtt_us = tc->mrtt_us + (sample - tc->mrtt_us) * 0.125;
515 mrtt =
clib_max (now - tc->rcv_opts.tsecr, 1);
543 tc->mrtt_us =
clib_max (tc->mrtt_us, 0.0001);
552 if (tc->rto_boff && mrtt > 1 *
THZ)
569 u32 *pending_deq_acked;
577 for (i = 0; i <
vec_len (pending_deq_acked); i++)
580 tc->flags &= ~TCP_CONN_DEQ_PENDING;
592 if (
seq_leq (tc->psh_seq, tc->snd_una))
593 tc->flags &= ~TCP_CONN_PSH_PENDING;
611 if (!(tc->flags & TCP_CONN_DEQ_PENDING))
614 tc->flags |= TCP_CONN_DEQ_PENDING;
616 tc->burst_acked += tc->bytes_acked + tc->sack_sb.snd_una_adv;
626 return ((
vnet_buffer (b)->tcp.ack_number == prev_snd_una)
627 &&
seq_gt (tc->snd_nxt, tc->snd_una)
629 && (prev_snd_wnd == tc->snd_wnd));
637 u32 prev_snd_wnd,
u32 prev_snd_una,
u8 * is_dack)
641 *is_dack = tc->sack_sb.last_sacked_bytes
647 #ifndef CLIB_MARCH_VARIANT 652 return hole - sb->holes;
658 return hole->end - hole->start;
709 next->prev = hole->prev;
713 sb->tail = hole->prev;
719 prev->next = hole->next;
723 sb->head = hole->next;
753 hole->prev = prev_index;
754 hole->next = prev->next;
757 next->prev = hole_index;
759 sb->tail = hole_index;
761 prev->next = hole_index;
765 sb->head = hole_index;
774 #ifndef CLIB_MARCH_VARIANT 779 u32 bytes = 0, blks = 0;
781 sb->last_lost_bytes = 0;
783 sb->sacked_bytes = 0;
788 if (
seq_gt (sb->high_sacked, left->end))
790 bytes = sb->high_sacked - left->end;
794 while ((right = left)
800 bytes += right->start - left->end;
810 sb->last_lost_bytes += left->is_lost ? 0 : left->end - left->start;
814 bytes += right->start - left->end;
816 while ((right = left));
819 sb->sacked_bytes = bytes;
830 u8 have_unsent,
u8 * can_rescue,
u8 * snd_limited)
835 while (hole &&
seq_leq (hole->end, sb->high_rxt) && hole->is_lost)
846 if (hole->is_lost &&
seq_lt (hole->start, sb->high_sacked))
859 else if (
seq_lt (hole->start, sb->high_sacked))
875 if (hole &&
seq_lt (sb->high_rxt, hole->start))
876 sb->high_rxt = hole->start;
889 snd_una =
seq_gt (snd_una, hole->start) ? snd_una : hole->start;
890 sb->cur_rxt_hole = sb->head;
892 sb->high_rxt = snd_una;
893 sb->rescue_rxt = snd_una - 1;
896 #ifndef CLIB_MARCH_VARIANT 915 sb->sacked_bytes = 0;
916 sb->last_sacked_bytes = 0;
917 sb->last_bytes_delivered = 0;
922 sb->last_lost_bytes = 0;
938 return (!hole || (
seq_geq (hole->start, tc->snd_una)
939 &&
seq_lt (hole->end, tc->snd_nxt)));
942 #ifndef CLIB_MARCH_VARIANT 948 u32 blk_index = 0, old_sacked_bytes, hole_index;
953 sb->last_sacked_bytes = 0;
954 sb->last_bytes_delivered = 0;
961 old_sacked_bytes = sb->sacked_bytes;
964 blk = tc->rcv_opts.sacks;
965 while (blk <
vec_end (tc->rcv_opts.sacks))
967 if (
seq_lt (blk->start, blk->end)
968 &&
seq_gt (blk->start, tc->snd_una)
969 &&
seq_gt (blk->start, ack)
970 &&
seq_lt (blk->start, tc->snd_nxt)
971 &&
seq_leq (blk->end, tc->snd_nxt))
976 vec_del1 (tc->rcv_opts.sacks, blk - tc->rcv_opts.sacks);
980 if (
seq_gt (ack, tc->snd_una))
982 tmp.start = tc->snd_una;
987 if (
vec_len (tc->rcv_opts.sacks) == 0)
993 for (i = 0; i <
vec_len (tc->rcv_opts.sacks); i++)
994 for (j = i + 1; j <
vec_len (tc->rcv_opts.sacks); j++)
995 if (
seq_lt (tc->rcv_opts.sacks[j].start, tc->rcv_opts.sacks[i].start))
997 tmp = tc->rcv_opts.sacks[
i];
998 tc->rcv_opts.sacks[
i] = tc->rcv_opts.sacks[j];
999 tc->rcv_opts.sacks[j] = tmp;
1006 tc->snd_una, tc->snd_nxt);
1008 tmp = tc->rcv_opts.sacks[
vec_len (tc->rcv_opts.sacks) - 1];
1009 sb->high_sacked = tmp.end;
1015 tmp = tc->rcv_opts.sacks[
vec_len (tc->rcv_opts.sacks) - 1];
1017 if (
seq_gt (tc->snd_nxt, last_hole->end))
1019 if (
seq_geq (last_hole->start, sb->high_sacked))
1021 last_hole->end = tc->snd_nxt;
1024 else if (
seq_lt (sb->high_sacked, tc->snd_nxt))
1032 if (
seq_gt (tmp.end, sb->high_sacked))
1033 sb->high_sacked = tmp.end;
1038 while (hole && blk_index < vec_len (tc->rcv_opts.sacks))
1040 blk = &tc->rcv_opts.sacks[blk_index];
1041 if (
seq_leq (blk->start, hole->start))
1044 if (
seq_geq (blk->end, hole->end))
1049 if (blk->end == ack)
1053 if (
seq_lt (ack, next_hole->start))
1054 sb->snd_una_adv = next_hole->start - ack;
1055 sb->last_bytes_delivered +=
1056 next_hole->start - hole->end;
1061 sb->snd_una_adv = sb->high_sacked - ack;
1062 sb->last_bytes_delivered += sb->high_sacked - hole->end;
1071 if (
seq_gt (blk->end, hole->start))
1073 hole->start = blk->end;
1081 if (
seq_lt (blk->end, hole->end))
1089 hole->end = blk->start;
1093 else if (
seq_lt (blk->start, hole->end))
1095 hole->end = blk->start;
1104 if (hole->start == ack + sb->snd_una_adv && hole->end == tc->snd_nxt)
1109 sb->last_sacked_bytes = sb->sacked_bytes
1110 - (old_sacked_bytes - sb->last_bytes_delivered);
1114 || sb->sacked_bytes < tc->snd_nxt -
seq_max (tc->snd_una, ack));
1115 ASSERT (sb->last_sacked_bytes + sb->lost_bytes <= tc->snd_nxt
1118 || sb->holes[sb->head].start == ack + sb->snd_una_adv);
1119 ASSERT (sb->last_lost_bytes <= sb->lost_bytes);
1136 if (
seq_lt (tc->snd_wl1, seq)
1137 || (tc->snd_wl1 == seq &&
seq_leq (tc->snd_wl2, ack)))
1139 tc->snd_wnd = snd_wnd;
1163 #ifndef CLIB_MARCH_VARIANT 1174 tc->snd_congestion = tc->snd_nxt;
1175 tc->cwnd_acc_bytes = 0;
1176 tc->snd_rxt_bytes = 0;
1177 tc->prev_ssthresh = tc->ssthresh;
1178 tc->prev_cwnd = tc->cwnd;
1179 tc->cc_algo->congestion (tc);
1180 tc->fr_occurences += 1;
1196 #ifndef CLIB_MARCH_VARIANT 1200 tc->snd_rxt_bytes = 0;
1201 tc->rcv_dupacks = 0;
1206 tc->flags &= ~TCP_CONN_FRXT_PENDING;
1215 tc->cwnd = tc->prev_cwnd;
1216 tc->ssthresh = tc->prev_ssthresh;
1217 tc->rcv_dupacks = 0;
1221 tc->snd_nxt =
seq_max (tc->snd_nxt, tc->snd_congestion);
1228 ASSERT (tc->rto_boff == 0);
1245 && tc->cwnd > tc->ssthresh + 3 * tc->snd_mss);
1273 ASSERT (tc->rto_boff == 0);
1288 tc->rcv_dupacks = 0;
1295 (
seq_leq (tc->snd_congestion, tc->snd_una - tc->bytes_acked)
1296 &&
seq_gt (tc->snd_congestion, tc->snd_una)))
1297 tc->snd_congestion = tc->snd_una - 1;
1324 if (tc->bytes_acked)
1336 ASSERT (tc->snd_una != tc->snd_nxt || 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);
1385 else if (!tc->bytes_acked
1407 if (
seq_leq (tc->snd_una, tc->snd_congestion)
1408 && ((!(tc->cwnd > tc->snd_mss
1409 && tc->bytes_acked <= 4 * tc->snd_mss))
1410 || (tc->rcv_opts.tsecr != tc->tsecr_last_ack)))
1412 tc->rcv_dupacks = 0;
1417 if (!tc->bytes_acked)
1431 if (
seq_geq (tc->snd_una, tc->snd_congestion))
1438 tc->tsecr_last_ack = tc->rcv_opts.tsecr;
1456 tc->rcv_dupacks = 0;
1469 ASSERT (tc->bytes_acked + tc->sack_sb.snd_una_adv
1470 >= tc->sack_sb.last_bytes_delivered
1471 || (tc->flags & TCP_CONN_FINSNT));
1475 if (
seq_lt (tc->snd_una, tc->sack_sb.high_rxt))
1477 rxt_delivered = tc->bytes_acked + tc->sack_sb.snd_una_adv
1478 - tc->sack_sb.last_bytes_delivered;
1479 ASSERT (tc->snd_rxt_bytes >= rxt_delivered);
1480 tc->snd_rxt_bytes -= rxt_delivered;
1485 tc->snd_rxt_bytes = 0;
1486 tc->sack_sb.high_rxt = tc->snd_una;
1492 if (tc->snd_rxt_bytes > tc->bytes_acked)
1493 tc->snd_rxt_bytes -= tc->bytes_acked;
1495 tc->snd_rxt_bytes = 0;
1513 u32 prev_snd_wnd, prev_snd_una;
1531 tc->errors.above_ack_wnd += 1;
1532 *error = TCP_ERROR_ACK_FUTURE;
1541 tc->errors.below_ack_wnd += 1;
1542 *error = TCP_ERROR_ACK_OLD;
1560 prev_snd_wnd = tc->snd_wnd;
1561 prev_snd_una = tc->snd_una;
1564 clib_net_to_host_u16 (th->window) << tc->snd_wscale);
1565 tc->bytes_acked =
vnet_buffer (b)->tcp.ack_number - tc->snd_una;
1566 tc->snd_una =
vnet_buffer (b)->tcp.ack_number + tc->sack_sb.snd_una_adv;
1569 if (tc->bytes_acked)
1575 if (tc->flags & TCP_CONN_RATE_SAMPLE)
1587 tc->dupacks_in += is_dack;
1590 *error = TCP_ERROR_ACK_OK;
1593 *error = TCP_ERROR_ACK_DUP;
1603 *error = TCP_ERROR_ACK_OK;
1620 u32 thread_index, *pending_disconnects;
1629 for (i = 0; i <
vec_len (pending_disconnects); i++)
1655 *error = TCP_ERROR_FIN_RCVD;
1658 #ifndef CLIB_MARCH_VARIANT 1663 for (i = 1; i <
vec_len (sacks); i++)
1665 if (sacks[i - 1].end == sacks[i].start)
1690 if (
seq_lt (tc->rcv_nxt, start))
1693 block->start = start;
1698 for (i = 0; i <
vec_len (tc->snd_sacks); i++)
1701 if (
seq_leq (tc->snd_sacks[i].start, tc->rcv_nxt))
1705 if (block && (
seq_geq (tc->snd_sacks[i].end, new_list[0].start)
1706 &&
seq_leq (tc->snd_sacks[i].start, new_list[0].end)))
1708 if (
seq_lt (tc->snd_sacks[i].start, new_list[0].start))
1709 new_list[0].start = tc->snd_sacks[i].start;
1710 if (
seq_lt (new_list[0].end, tc->snd_sacks[i].end))
1711 new_list[0].end = tc->snd_sacks[i].end;
1717 vec_add1 (new_list, tc->snd_sacks[i]);
1724 tc->snd_sacks_fl = tc->snd_sacks;
1725 tc->snd_sacks = new_list;
1735 for (
i = 0;
i <
vec_len (tc->snd_sacks);
i++)
1736 bytes += tc->snd_sacks[
i].end - tc->snd_sacks[
i].start;
1746 int written, error = TCP_ERROR_ENQUEUED;
1752 tc->bytes_in += written;
1754 TCP_EVT_DBG (TCP_EVT_INPUT, tc, 0, data_len, written);
1759 tc->rcv_nxt += written;
1762 else if (written > data_len)
1764 tc->rcv_nxt += written;
1765 TCP_EVT_DBG (TCP_EVT_CC_INPUT, tc, data_len, written);
1767 else if (written > 0)
1770 tc->rcv_nxt += written;
1771 error = TCP_ERROR_PARTIALLY_ENQUEUED;
1775 return TCP_ERROR_FIFO_FULL;
1809 return TCP_ERROR_FIFO_FULL;
1812 TCP_EVT_DBG (TCP_EVT_INPUT, tc, 1, data_len, data_len);
1813 tc->bytes_in += data_len;
1821 s0 =
session_get (tc->c_s_index, tc->c_thread_index);
1829 start = tc->rcv_nxt +
offset;
1837 return TCP_ERROR_ENQUEUED_OOO;
1852 || (tc->flags & TCP_CONN_SNDACK) != 0
1869 if (!(b->
flags & VLIB_BUFFER_NEXT_PRESENT))
1876 n_bytes_to_drop -= discard;
1878 while (n_bytes_to_drop);
1879 if (n_bytes_to_drop > first)
1897 u32 error, n_bytes_to_drop, n_data_bytes;
1902 tc->data_segs_in += 1;
1916 error = TCP_ERROR_SEGMENT_OLD;
1922 n_bytes_to_drop = tc->rcv_nxt -
vnet_buffer (b)->tcp.seq_number;
1923 n_data_bytes -= n_bytes_to_drop;
1927 error = TCP_ERROR_SEGMENT_OLD;
1938 tc->rcv_las + tc->rcv_wnd);
1974 s =
format (s,
"%U\n%U%U",
1989 s =
format (s,
"%d -> %d (%U)",
1990 clib_net_to_host_u16 (t->
tcp_header.dst_port),
2033 if (b0->
flags & VLIB_BUFFER_IS_TRACED)
2057 #define tcp_maybe_inc_counter(node_id, err, count) \ 2059 if (next0 != tcp_next_drop (is_ip4)) \ 2060 tcp_node_inc_counter_i (vm, tcp4_##node_id##_node.index, \ 2061 tcp6_##node_id##_node.index, is_ip4, err, \ 2064 #define tcp_inc_counter(node_id, err, count) \ 2065 tcp_node_inc_counter_i (vm, tcp4_##node_id##_node.index, \ 2066 tcp6_##node_id##_node.index, is_ip4, \ 2068 #define tcp_maybe_inc_err_counter(cnts, err) \ 2070 cnts[err] += (next0 != tcp_next_drop (is_ip4)); \ 2072 #define tcp_inc_err_counter(cnts, err, val) \ 2076 #define tcp_store_err_counters(node_id, cnts) \ 2079 for (i = 0; i < TCP_N_ERROR; i++) \ 2081 tcp_inc_counter(node_id, i, cnts[i]); \ 2091 u32 n_left_from, *from, *first_buffer;
2100 while (n_left_from > 0)
2102 u32 bi0, error0 = TCP_ERROR_ACK_OK;
2107 if (n_left_from > 1)
2125 error0 = TCP_ERROR_INVALID_CONNECTION;
2160 err_counters[TCP_ERROR_MSG_QUEUE_FULL] = errors;
2186 .name =
"tcp4-established",
2188 .vector_size =
sizeof (
u32),
2194 #define _(s,n) [TCP_ESTABLISHED_NEXT_##s] = n, 2205 .name =
"tcp6-established",
2207 .vector_size =
sizeof (
u32),
2213 #define _(s,n) [TCP_ESTABLISHED_NEXT_##s] = n, 2232 if (tc->c_lcl_port == 0 && tc->state == TCP_STATE_LISTEN)
2235 u8 is_valid = (tc->c_lcl_port == hdr->dst_port
2236 && (tc->state == TCP_STATE_LISTEN
2237 || tc->c_rmt_port == hdr->src_port));
2243 tc->c_proto, tc->c_is_ip4);
2247 if (tmp->lcl_port == hdr->dst_port
2248 && tmp->rmt_port == hdr->src_port)
2250 TCP_DBG (
"half-open is valid!");
2279 thread_index, &is_filtered);
2294 thread_index, &is_filtered);
2306 u32 n_left_from, *from, *first_buffer, errors = 0;
2313 while (n_left_from > 0)
2315 u32 bi0, ack0, seq0, error0 = TCP_ERROR_NONE;
2330 error0 = TCP_ERROR_INVALID_CONNECTION;
2340 my_thread_index, is_ip4));
2341 error0 = TCP_ERROR_SPURIOUS_SYN_ACK;
2352 || tcp0->src_port != tc0->c_rmt_port))
2354 error0 = TCP_ERROR_INVALID_CONNECTION;
2361 error0 = TCP_ERROR_SEGMENT_INVALID;
2382 if (
seq_leq (ack0, tc0->iss) ||
seq_gt (ack0, tc0->snd_nxt))
2386 error0 = TCP_ERROR_RCV_WND;
2391 if (
seq_gt (tc0->snd_una, ack0))
2393 error0 = TCP_ERROR_ACK_INVALID;
2408 error0 = TCP_ERROR_RST_RCVD;
2423 error0 = TCP_ERROR_SEGMENT_INVALID;
2430 error0 = TCP_ERROR_OPTIONS;
2436 pool_get (tm->connections[my_thread_index], new_tc0);
2438 new_tc0->c_c_index = new_tc0 - tm->connections[my_thread_index];
2439 new_tc0->c_thread_index = my_thread_index;
2441 new_tc0->irs = seq0;
2448 tc0->flags |= TCP_CONN_HALF_OPEN_DONE;
2452 new_tc0->tsval_recent = new_tc0->rcv_opts.tsval;
2457 new_tc0->snd_wscale = new_tc0->rcv_opts.wscale;
2459 new_tc0->rcv_wscale = 0;
2461 new_tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
2462 << new_tc0->snd_wscale;
2463 new_tc0->snd_wl1 = seq0;
2464 new_tc0->snd_wl2 = ack0;
2474 new_tc0->snd_una = ack0;
2475 new_tc0->state = TCP_STATE_ESTABLISHED;
2478 new_tc0->rcv_las = new_tc0->rcv_nxt;
2486 error0 = TCP_ERROR_CREATE_SESSION_FAIL;
2490 new_tc0->tx_fifo_size =
2495 error0 = TCP_ERROR_SYN_ACKS_RCVD;
2500 new_tc0->state = TCP_STATE_SYN_RCVD;
2508 error0 = TCP_ERROR_CREATE_SESSION_FAIL;
2512 new_tc0->tx_fifo_size =
2514 new_tc0->rtt_ts = 0;
2517 error0 = TCP_ERROR_SYNS_RCVD;
2526 if (error0 == TCP_ERROR_ACK_OK)
2527 error0 = TCP_ERROR_SYN_ACKS_RCVD;
2571 .name =
"tcp4-syn-sent",
2573 .vector_size =
sizeof (
u32),
2579 #define _(s,n) [TCP_SYN_SENT_NEXT_##s] = n, 2590 .name =
"tcp6-syn-sent",
2592 .vector_size =
sizeof (
u32),
2598 #define _(s,n) [TCP_SYN_SENT_NEXT_##s] = n, 2616 u32 n_left_from, *from, max_dequeue;
2621 while (n_left_from > 0)
2623 u32 bi0, error0 = TCP_ERROR_NONE;
2638 error0 = TCP_ERROR_INVALID_CONNECTION;
2650 if (tmp->state != tc0->state)
2652 if (tc0->state != TCP_STATE_CLOSED)
2663 error0 = TCP_ERROR_CONNECTION_CLOSED;
2678 case TCP_STATE_SYN_RCVD:
2681 if (tc0->rcv_nxt !=
vnet_buffer (b0)->tcp.seq_number || is_fin0)
2684 error0 = TCP_ERROR_SEGMENT_INVALID;
2704 tc0->state = TCP_STATE_ESTABLISHED;
2709 tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
2710 << tc0->rcv_opts.wscale;
2718 error0 = TCP_ERROR_MSG_QUEUE_FULL;
2722 error0 = TCP_ERROR_ACK_OK;
2724 case TCP_STATE_ESTABLISHED:
2731 case TCP_STATE_FIN_WAIT_1:
2739 if (tc0->flags & TCP_CONN_FINPNDG)
2743 if (max_dequeue <= tc0->burst_acked)
2746 else if ((tc0->flags & TCP_CONN_FINRCVD) && tc0->bytes_acked)
2751 else if (tc0->snd_una == tc0->snd_nxt)
2759 if (tc0->flags & TCP_CONN_FINRCVD)
2774 if (tc0->burst_acked > 1)
2776 tc0->burst_acked - 1);
2777 tc0->burst_acked = 0;
2780 case TCP_STATE_FIN_WAIT_2:
2786 tc0->burst_acked = 0;
2788 case TCP_STATE_CLOSE_WAIT:
2793 if (!(tc0->flags & TCP_CONN_FINPNDG))
2798 if (max_dequeue > tc0->burst_acked)
2806 case TCP_STATE_CLOSING:
2813 if (tc0->snd_una != tc0->snd_nxt)
2823 case TCP_STATE_LAST_ACK:
2832 if (is_fin0 && tc0->snd_una != tc0->snd_nxt)
2850 case TCP_STATE_TIME_WAIT:
2875 case TCP_STATE_ESTABLISHED:
2876 case TCP_STATE_FIN_WAIT_1:
2877 case TCP_STATE_FIN_WAIT_2:
2881 case TCP_STATE_CLOSE_WAIT:
2882 case TCP_STATE_CLOSING:
2883 case TCP_STATE_LAST_ACK:
2884 case TCP_STATE_TIME_WAIT:
2898 case TCP_STATE_ESTABLISHED:
2906 case TCP_STATE_SYN_RCVD:
2916 case TCP_STATE_CLOSE_WAIT:
2917 case TCP_STATE_CLOSING:
2918 case TCP_STATE_LAST_ACK:
2921 case TCP_STATE_FIN_WAIT_1:
2924 if (tc0->flags & TCP_CONN_FINPNDG)
2929 tc0->flags |= TCP_CONN_FINRCVD;
2942 case TCP_STATE_FIN_WAIT_2:
2951 case TCP_STATE_TIME_WAIT:
2958 error0 = TCP_ERROR_FIN_RCVD;
2997 .name =
"tcp4-rcv-process",
2999 .vector_size =
sizeof (
u32),
3005 #define _(s,n) [TCP_RCV_PROCESS_NEXT_##s] = n, 3016 .name =
"tcp6-rcv-process",
3018 .vector_size =
sizeof (
u32),
3024 #define _(s,n) [TCP_RCV_PROCESS_NEXT_##s] = n, 3039 u32 n_left_from, *from, n_syns = 0, *first_buffer;
3045 while (n_left_from > 0)
3055 u32 error0 = TCP_ERROR_NONE;
3097 error0 = TCP_ERROR_CREATE_EXISTS;
3103 child0->c_lcl_port = th0->dst_port;
3104 child0->c_rmt_port = th0->src_port;
3105 child0->c_is_ip4 = is_ip4;
3106 child0->state = TCP_STATE_SYN_RCVD;
3107 child0->c_fib_index = lc0->c_fib_index;
3124 error0 = TCP_ERROR_OPTIONS;
3130 child0->rcv_nxt =
vnet_buffer (b0)->tcp.seq_number + 1;
3131 child0->rcv_las = child0->rcv_nxt;
3138 child0->tsval_recent = child0->rcv_opts.tsval;
3143 child0->snd_wscale = child0->rcv_opts.wscale;
3145 child0->snd_wnd = clib_net_to_host_u16 (th0->window)
3146 << child0->snd_wscale;
3147 child0->snd_wl1 =
vnet_buffer (b0)->tcp.seq_number;
3148 child0->snd_wl2 =
vnet_buffer (b0)->tcp.ack_number;
3154 lc0->c_thread_index, 0 ))
3157 error0 = TCP_ERROR_CREATE_SESSION_FAIL;
3175 n_syns += (error0 == TCP_ERROR_NONE);
3199 .name =
"tcp4-listen",
3201 .vector_size =
sizeof (
u32),
3207 #define _(s,n) [TCP_LISTEN_NEXT_##s] = n, 3218 .name =
"tcp6-listen",
3220 .vector_size =
sizeof (
u32),
3226 #define _(s,n) [TCP_LISTEN_NEXT_##s] = n, 3234 typedef enum _tcp_input_next
3246 #define foreach_tcp4_input_next \ 3247 _ (DROP, "ip4-drop") \ 3248 _ (LISTEN, "tcp4-listen") \ 3249 _ (RCV_PROCESS, "tcp4-rcv-process") \ 3250 _ (SYN_SENT, "tcp4-syn-sent") \ 3251 _ (ESTABLISHED, "tcp4-established") \ 3252 _ (RESET, "tcp4-reset") \ 3253 _ (PUNT, "ip4-punt") 3255 #define foreach_tcp6_input_next \ 3256 _ (DROP, "ip6-drop") \ 3257 _ (LISTEN, "tcp6-listen") \ 3258 _ (RCV_PROCESS, "tcp6-rcv-process") \ 3259 _ (SYN_SENT, "tcp6-syn-sent") \ 3260 _ (ESTABLISHED, "tcp6-established") \ 3261 _ (RESET, "tcp6-reset") \ 3262 _ (PUNT, "ip6-punt") 3264 #define filter_flags (TCP_FLAG_SYN|TCP_FLAG_ACK|TCP_FLAG_RST|TCP_FLAG_FIN) 3275 for (i = 0; i < n_bufs; i++)
3277 if (bs[i]->
flags & VLIB_BUFFER_IS_TRACED)
3291 if (*error == TCP_ERROR_FILTERED || *error == TCP_ERROR_WRONG_THREAD)
3295 else if ((is_ip4 && tm->punt_unknown4) || (!is_ip4 && tm->punt_unknown6))
3298 *error = TCP_ERROR_PUNT;
3303 *error = TCP_ERROR_NO_LISTENER;
3309 u8 is_ip4,
u8 is_nolookup)
3312 int n_advance_bytes, n_data_bytes;
3323 *error = TCP_ERROR_LENGTH;
3329 n_data_bytes = clib_net_to_host_u16 (ip4->
length) - n_advance_bytes;
3334 *error = TCP_ERROR_LENGTH;
3350 *error = TCP_ERROR_LENGTH;
3358 n_advance_bytes +=
sizeof (ip6[0]);
3362 *error = TCP_ERROR_LENGTH;
3378 tcp->dst_port, tcp->src_port,
3380 thread_index, &result);
3387 tcp.connection_index,
3390 vnet_buffer (b)->tcp.seq_number = clib_net_to_host_u32 (tcp->seq_number);
3391 vnet_buffer (b)->tcp.ack_number = clib_net_to_host_u32 (tcp->ack_number);
3392 vnet_buffer (b)->tcp.data_offset = n_advance_bytes;
3398 *error = result ? TCP_ERROR_NONE + result : *error;
3412 *next = tm->dispatch_table[tc->state][
flags].next;
3413 *error = tm->dispatch_table[tc->state][
flags].error;
3423 if (*error == TCP_ERROR_DISPATCH)
3424 clib_warning (
"tcp conn %u disp error state %U flags %U",
3448 while (n_left_from >= 4)
3450 u32 error0 = TCP_ERROR_NO_LISTENER, error1 = TCP_ERROR_NO_LISTENER;
3473 vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
3474 vnet_buffer (b[1])->tcp.connection_index = tc1->c_c_index;
3484 vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
3493 vnet_buffer (b[1])->tcp.connection_index = tc1->c_c_index;
3504 while (n_left_from > 0)
3507 u32 error0 = TCP_ERROR_NO_LISTENER;
3509 if (n_left_from > 1)
3521 vnet_buffer (b[0])->tcp.connection_index = tc0->c_c_index;
3558 .name =
"tcp4-input-nolookup",
3560 .vector_size =
sizeof (
u32),
3566 #define _(s,n) [TCP_INPUT_NEXT_##s] = n, 3578 .name =
"tcp6-input-nolookup",
3580 .vector_size =
sizeof (
u32),
3586 #define _(s,n) [TCP_INPUT_NEXT_##s] = n, 3612 .name =
"tcp4-input",
3614 .vector_size =
sizeof (
u32),
3620 #define _(s,n) [TCP_INPUT_NEXT_##s] = n, 3632 .name =
"tcp6-input",
3634 .vector_size =
sizeof (
u32),
3640 #define _(s,n) [TCP_INPUT_NEXT_##s] = n, 3649 #ifndef CLIB_MARCH_VARIANT 3654 for (i = 0; i <
ARRAY_LEN (tm->dispatch_table); i++)
3655 for (j = 0; j <
ARRAY_LEN (tm->dispatch_table[i]); j++)
3658 tm->dispatch_table[
i][j].error = TCP_ERROR_DISPATCH;
3661 #define _(t,f,n,e) \ 3663 tm->dispatch_table[TCP_STATE_##t][f].next = (n); \ 3664 tm->dispatch_table[TCP_STATE_##t][f].error = (e); \ 3673 TCP_ERROR_ACK_INVALID);
3675 TCP_ERROR_SEGMENT_INVALID);
3677 TCP_ERROR_SEGMENT_INVALID);
3679 TCP_ERROR_INVALID_CONNECTION);
3682 TCP_ERROR_SEGMENT_INVALID);
3684 TCP_ERROR_SEGMENT_INVALID);
3688 TCP_ERROR_SEGMENT_INVALID);
3690 TCP_ERROR_SEGMENT_INVALID);
3692 TCP_ERROR_SEGMENT_INVALID);
3872 TCP_ERROR_CONNECTION_CLOSED);
#define tcp_in_cong_recovery(tc)
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
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.
#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)
svm_fifo_t * rx_fifo
Pointers to rx/tx buffers.
struct _tcp_main tcp_main_t
void tcp_connection_timers_reset(tcp_connection_t *tc)
Stop all connection timers.
u16 current_length
Nbytes between current data and the end of this buffer.
int session_main_flush_enqueue_events(u8 transport_proto, u32 thread_index)
Flushes queue of sessions that are to be notified of new data enqueued events.
#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)
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
struct _tcp_connection tcp_connection_t
static session_t * session_get(u32 si, u32 thread_index)
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 VLIB_NODE_FN(node)
#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)
format_function_t format_tcp_flags
#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.
#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.
vl_api_interface_index_t sw_if_index
#define VLIB_INIT_FUNCTION(x)
#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.
#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)
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.
#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 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
static void tcp_cc_rcv_cong_ack(tcp_connection_t *tc, tcp_cc_ack_t ack_type, tcp_rate_sample_t *rs)
#define vec_del1(v, i)
Delete the element at index I.
#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)
#define TCP_DBG(_fmt, _args...)
#define TCP_MAX_WND_SCALE
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_program_dupack(tcp_connection_t *tc)
void tcp_send_reset(tcp_connection_t *tc)
Build and set reset packet for connection.
#define TCP_DUPACK_THRESHOLD
static u32 tcp_tstamp(tcp_connection_t *tc)
Generate timestamp for tcp connection.
format_function_t format_tcp_state
static void tcp_cc_undo_recovery(tcp_connection_t *tc)
#define clib_warning(format, args...)
struct _transport_connection transport_connection_t
#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)
static u32 transport_max_tx_dequeue(transport_connection_t *tc)
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
#define tcp_fastrecovery_first_on(tc)
#define seq_geq(_s1, _s2)
static void transport_add_tx_event(transport_connection_t *tc)
void tcp_bt_sample_delivery_rate(tcp_connection_t *tc, tcp_rate_sample_t *rs)
Generate a delivery rate sample from recently acked bytes.
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
static uword ip6_address_is_link_local_unicast(const ip6_address_t *a)
#define tcp_fastrecovery_first_off(tc)
int session_stream_accept_notify(transport_connection_t *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)
#define vec_elt(v, i)
Get vector value at index i.
#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)
u32 next_buffer
Next buffer for this linked-list of buffers.
static u8 tcp_is_lost_fin(tcp_connection_t *tc)
static void tcp_cc_rcv_ack(tcp_connection_t *tc, tcp_rate_sample_t *rs)
static tcp_worker_ctx_t * tcp_get_worker(u32 thread_index)
void session_transport_closed_notify(transport_connection_t *tc)
Notification from transport that it is closed.
static void tcp_retransmit_timer_update(tcp_connection_t *tc)
VLIB buffer representation.
#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.
static void tcp_cc_recovered(tcp_connection_t *tc)
#define TCP_OPTION_LEN_MSS
#define tcp_disconnect_pending(tc)
void tcp_program_fastretransmit(tcp_connection_t *tc)
static u32 ooo_segment_offset_prod(svm_fifo_t *f, ooo_segment_t *s)
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)
static tcp_connection_t * tcp_connection_get(u32 conn_index, u32 thread_index)
ip4_main_t ip4_main
Global ip4 main structure.
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.
u16 flags
Copy of main node flags.
u32 session_tx_fifo_dequeue_drop(transport_connection_t *tc, u32 max_bytes)
void tcp_program_ack(tcp_connection_t *tc)
#define tcp_opts_sack_permitted(_to)
static int ip4_header_bytes(const ip4_header_t *i)
int session_stream_accept(transport_connection_t *tc, u32 listener_index, u32 thread_index, u8 notify)
Accept a stream session.
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
u32 total_length_not_including_first_buffer
Only valid for first buffer in chain.
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)
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.