2 * Copyright (c) 2016-2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 * @brief TCP host stack utilities
21 #include <vnet/tcp/tcp.h>
22 #include <vnet/session/session.h>
23 #include <vnet/fib/fib.h>
24 #include <vnet/dpo/load_balance.h>
25 #include <vnet/dpo/receive_dpo.h>
26 #include <vnet/ip-neighbor/ip_neighbor.h>
33 fib_protocol_t nh_proto;
34 vnet_link_t link_type;
38 } tcp_add_del_adj_args_t;
41 tcp_add_del_adj_cb (tcp_add_del_adj_args_t * args)
46 adj_nbr_add_or_lock (args->nh_proto, args->link_type, &args->ip,
51 ai = adj_nbr_find (FIB_PROTOCOL_IP6, VNET_LINK_IP6, &args->ip,
53 if (ai != ADJ_INDEX_INVALID)
59 tcp_add_del_adjacency (tcp_connection_t * tc, u8 is_add)
61 tcp_add_del_adj_args_t args = {
62 .nh_proto = FIB_PROTOCOL_IP6,
63 .link_type = VNET_LINK_IP6,
65 .sw_if_index = tc->sw_if_index,
68 vlib_rpc_call_main_thread (tcp_add_del_adj_cb, (u8 *) & args,
73 tcp_cc_init (tcp_connection_t * tc)
75 tc->cc_algo->init (tc);
79 tcp_cc_cleanup (tcp_connection_t * tc)
81 if (tc->cc_algo->cleanup)
82 tc->cc_algo->cleanup (tc);
86 tcp_cc_algo_register (tcp_cc_algorithm_type_e type,
87 const tcp_cc_algorithm_t * vft)
89 tcp_main_t *tm = vnet_get_tcp_main ();
90 vec_validate (tm->cc_algos, type);
92 tm->cc_algos[type] = *vft;
93 hash_set_mem (tm->cc_algo_by_name, vft->name, type);
97 tcp_cc_algo_get (tcp_cc_algorithm_type_e type)
99 tcp_main_t *tm = vnet_get_tcp_main ();
100 return &tm->cc_algos[type];
103 tcp_cc_algorithm_type_e
104 tcp_cc_algo_new_type (const tcp_cc_algorithm_t * vft)
106 tcp_main_t *tm = vnet_get_tcp_main ();
107 tcp_cc_algo_register (++tm->cc_last_type, vft);
108 return tm->cc_last_type;
112 tcp_connection_bind (u32 session_index, transport_endpoint_t * lcl)
114 tcp_main_t *tm = &tcp_main;
115 tcp_connection_t *listener;
118 pool_get (tm->listener_pool, listener);
119 clib_memset (listener, 0, sizeof (*listener));
121 listener->c_c_index = listener - tm->listener_pool;
122 listener->c_lcl_port = lcl->port;
124 /* If we are provided a sw_if_index, bind using one of its ips */
125 if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX)
127 if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index,
129 ip_set (&lcl->ip, iface_ip, lcl->is_ip4);
131 ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4);
132 listener->c_is_ip4 = lcl->is_ip4;
133 listener->c_proto = TRANSPORT_PROTO_TCP;
134 listener->c_s_index = session_index;
135 listener->c_fib_index = lcl->fib_index;
136 listener->state = TCP_STATE_LISTEN;
137 listener->cc_algo = tcp_cc_algo_get (tcp_cfg.cc_algo);
139 tcp_connection_timers_init (listener);
141 TCP_EVT (TCP_EVT_BIND, listener);
143 return listener->c_c_index;
147 tcp_session_bind (u32 session_index, transport_endpoint_t * tep)
149 return tcp_connection_bind (session_index, tep);
153 tcp_connection_unbind (u32 listener_index)
155 tcp_main_t *tm = vnet_get_tcp_main ();
156 tcp_connection_t *tc;
158 tc = pool_elt_at_index (tm->listener_pool, listener_index);
160 TCP_EVT (TCP_EVT_UNBIND, tc);
162 /* Poison the entry */
164 clib_memset (tc, 0xFA, sizeof (*tc));
166 pool_put_index (tm->listener_pool, listener_index);
170 tcp_session_unbind (u32 listener_index)
172 tcp_connection_unbind (listener_index);
176 static transport_connection_t *
177 tcp_session_get_listener (u32 listener_index)
179 tcp_main_t *tm = vnet_get_tcp_main ();
180 tcp_connection_t *tc;
181 tc = pool_elt_at_index (tm->listener_pool, listener_index);
182 return &tc->connection;
186 * Cleanup half-open connection
190 tcp_half_open_connection_del (tcp_connection_t * tc)
192 tcp_main_t *tm = vnet_get_tcp_main ();
193 clib_spinlock_lock_if_init (&tm->half_open_lock);
195 clib_memset (tc, 0xFA, sizeof (*tc));
196 pool_put (tm->half_open_connections, tc);
197 clib_spinlock_unlock_if_init (&tm->half_open_lock);
201 * Try to cleanup half-open connection
203 * If called from a thread that doesn't own tc, the call won't have any
206 * @param tc - connection to be cleaned up
207 * @return non-zero if cleanup failed.
210 tcp_half_open_connection_cleanup (tcp_connection_t * tc)
212 /* Make sure this is the owning thread */
213 if (tc->c_thread_index != vlib_get_thread_index ())
215 tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT_SYN);
216 tcp_half_open_connection_del (tc);
220 static tcp_connection_t *
221 tcp_half_open_connection_new (void)
223 tcp_main_t *tm = vnet_get_tcp_main ();
224 tcp_connection_t *tc = 0;
225 ASSERT (vlib_get_thread_index () == 0);
226 pool_get (tm->half_open_connections, tc);
227 clib_memset (tc, 0, sizeof (*tc));
228 tc->c_c_index = tc - tm->half_open_connections;
233 * Cleans up connection state.
238 tcp_connection_cleanup (tcp_connection_t * tc)
240 TCP_EVT (TCP_EVT_DELETE, tc);
242 /* Cleanup local endpoint if this was an active connect */
243 if (!(tc->cfg_flags & TCP_CFG_F_NO_ENDPOINT))
244 transport_endpoint_cleanup (TRANSPORT_PROTO_TCP, &tc->c_lcl_ip,
247 /* Check if connection is not yet fully established */
248 if (tc->state == TCP_STATE_SYN_SENT)
250 /* Try to remove the half-open connection. If this is not the owning
251 * thread, tc won't be removed. Retransmit or establish timers will
252 * eventually expire and call again cleanup on the right thread. */
253 if (tcp_half_open_connection_cleanup (tc))
254 tc->flags |= TCP_CONN_HALF_OPEN_DONE;
258 /* Make sure all timers are cleared */
259 tcp_connection_timers_reset (tc);
261 if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6))
262 tcp_add_del_adjacency (tc, 0);
265 vec_free (tc->snd_sacks);
266 vec_free (tc->snd_sacks_fl);
267 vec_free (tc->rcv_opts.sacks);
268 pool_free (tc->sack_sb.holes);
270 if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
273 tcp_connection_free (tc);
278 * Connection removal.
280 * This should be called only once connection enters CLOSED state. Note
281 * that it notifies the session of the removal event, so if the goal is to
282 * just remove the connection, call tcp_connection_cleanup instead.
285 tcp_connection_del (tcp_connection_t * tc)
287 session_transport_delete_notify (&tc->connection);
288 tcp_connection_cleanup (tc);
292 tcp_connection_alloc (u8 thread_index)
294 tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
295 tcp_connection_t *tc;
297 pool_get (wrk->connections, tc);
298 clib_memset (tc, 0, sizeof (*tc));
299 tc->c_c_index = tc - wrk->connections;
300 tc->c_thread_index = thread_index;
305 tcp_connection_alloc_w_base (u8 thread_index, tcp_connection_t * base)
307 tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
308 tcp_connection_t *tc;
310 pool_get (wrk->connections, tc);
311 clib_memcpy_fast (tc, base, sizeof (*tc));
312 tc->c_c_index = tc - wrk->connections;
313 tc->c_thread_index = thread_index;
318 tcp_connection_free (tcp_connection_t * tc)
320 tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index);
323 clib_memset (tc, 0xFA, sizeof (*tc));
324 pool_put (wrk->connections, tc);
327 pool_put (wrk->connections, tc);
331 * Begin connection closing procedure.
333 * If at the end the connection is not in CLOSED state, it is not removed.
334 * Instead, we rely on on TCP to advance through state machine to either
335 * 1) LAST_ACK (passive close) whereby when the last ACK is received
336 * tcp_connection_del is called. This notifies session of the delete and
338 * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers
339 * and cleanup is called.
341 * N.B. Half-close connections are not supported
344 tcp_connection_close (tcp_connection_t * tc)
346 TCP_EVT (TCP_EVT_CLOSE, tc);
348 /* Send/Program FIN if needed and switch state */
351 case TCP_STATE_SYN_SENT:
352 /* Try to cleanup. If not on the right thread, mark as half-open done.
353 * Connection will be cleaned up when establish timer pops */
354 tcp_connection_cleanup (tc);
356 case TCP_STATE_SYN_RCVD:
357 tcp_connection_timers_reset (tc);
359 tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1);
360 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.finwait1_time);
362 case TCP_STATE_ESTABLISHED:
363 /* If closing with unread data, reset the connection */
364 if (transport_max_rx_dequeue (&tc->connection))
367 tcp_connection_timers_reset (tc);
368 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
369 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.closewait_time);
370 session_transport_closed_notify (&tc->connection);
371 tcp_worker_stats_inc (tc->c_thread_index, rst_unread, 1);
374 if (!transport_max_tx_dequeue (&tc->connection))
377 tc->flags |= TCP_CONN_FINPNDG;
378 tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1);
379 /* Set a timer in case the peer stops responding. Otherwise the
380 * connection will be stuck here forever. */
381 ASSERT (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID);
382 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.finwait1_time);
384 case TCP_STATE_CLOSE_WAIT:
385 if (!transport_max_tx_dequeue (&tc->connection))
388 tcp_connection_timers_reset (tc);
389 tcp_connection_set_state (tc, TCP_STATE_LAST_ACK);
390 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.lastack_time);
393 tc->flags |= TCP_CONN_FINPNDG;
395 case TCP_STATE_FIN_WAIT_1:
396 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.finwait1_time);
398 case TCP_STATE_CLOSED:
399 tcp_connection_timers_reset (tc);
400 /* Delete connection but instead of doing it now wait until next
401 * dispatch cycle to give the session layer a chance to clear
402 * unhandled events */
403 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
406 TCP_DBG ("state: %u", tc->state);
411 tcp_session_close (u32 conn_index, u32 thread_index)
413 tcp_connection_t *tc;
414 tc = tcp_connection_get (conn_index, thread_index);
415 tcp_connection_close (tc);
419 tcp_session_cleanup (u32 conn_index, u32 thread_index)
421 tcp_connection_t *tc;
422 tc = tcp_connection_get (conn_index, thread_index);
425 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
426 tcp_connection_cleanup (tc);
430 tcp_session_reset (u32 conn_index, u32 thread_index)
432 tcp_connection_t *tc;
433 tc = tcp_connection_get (conn_index, thread_index);
434 session_transport_closed_notify (&tc->connection);
436 tcp_connection_timers_reset (tc);
437 tcp_cong_recovery_off (tc);
438 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
439 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
443 * Initialize all connection timers as invalid
446 tcp_connection_timers_init (tcp_connection_t * tc)
450 /* Set all to invalid */
451 for (i = 0; i < TCP_N_TIMERS; i++)
453 tc->timers[i] = TCP_TIMER_HANDLE_INVALID;
456 tc->rto = TCP_RTO_INIT;
460 * Stop all connection timers
463 tcp_connection_timers_reset (tcp_connection_t * tc)
466 for (i = 0; i < TCP_N_TIMERS; i++)
468 tcp_timer_reset (tc, i);
473 typedef struct ip4_tcp_hdr
479 typedef struct ip6_tcp_hdr
486 tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo,
489 const dpo_id_t *choice;
493 lb = load_balance_get (dpo->dpoi_index);
497 clib_memset (&hdr, 0, sizeof (hdr));
498 hdr.ip.protocol = IP_PROTOCOL_TCP;
499 hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32;
500 hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32;
501 hdr.tcp.src_port = tc->c_lcl_port;
502 hdr.tcp.dst_port = tc->c_rmt_port;
503 hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config);
508 clib_memset (&hdr, 0, sizeof (hdr));
509 hdr.ip.protocol = IP_PROTOCOL_TCP;
510 clib_memcpy_fast (&hdr.ip.src_address, &tc->c_lcl_ip.ip6,
511 sizeof (ip6_address_t));
512 clib_memcpy_fast (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6,
513 sizeof (ip6_address_t));
514 hdr.tcp.src_port = tc->c_lcl_port;
515 hdr.tcp.dst_port = tc->c_rmt_port;
516 hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config);
518 choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1);
519 dpo_copy (result, choice);
523 tcp_lookup_rmt_in_fib (tcp_connection_t * tc)
528 clib_memcpy_fast (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr));
529 prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
530 prefix.fp_len = tc->c_is_ip4 ? 32 : 128;
531 fib_index = fib_table_find (prefix.fp_proto, tc->c_fib_index);
532 return fib_table_lookup (fib_index, &prefix);
536 tcp_connection_stack_on_fib_entry (tcp_connection_t * tc)
538 dpo_id_t choice = DPO_INVALID;
539 u32 output_node_index;
542 fe = fib_entry_get (tc->c_rmt_fei);
543 if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE)
546 tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice);
549 tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index;
550 dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice);
554 /** Stack tcp connection on peer's fib entry.
556 * This ultimately populates the dpo the connection will use to send packets.
559 tcp_connection_fib_attach (tcp_connection_t * tc)
561 tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc);
563 ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID);
565 tcp_connection_stack_on_fib_entry (tc);
570 * Generate random iss as per rfc6528
573 tcp_generate_random_iss (tcp_connection_t * tc)
575 tcp_main_t *tm = &tcp_main;
579 tmp = (u64) tc->c_lcl_ip.ip4.as_u32 << 32 | (u64) tc->c_rmt_ip.ip4.as_u32;
581 tmp = tc->c_lcl_ip.ip6.as_u64[0] ^ tc->c_lcl_ip.ip6.as_u64[1]
582 ^ tc->c_rmt_ip.ip6.as_u64[0] ^ tc->c_rmt_ip.ip6.as_u64[1];
584 tmp ^= tm->iss_seed.first | ((u64) tc->c_lcl_port << 16 | tc->c_rmt_port);
585 tmp ^= tm->iss_seed.second;
586 tmp = clib_xxhash (tmp) + clib_cpu_time_now ();
587 return ((tmp >> 32) ^ (tmp & 0xffffffff));
591 * Initialize max segment size we're able to process.
593 * The value is constrained by the output interface's MTU and by the size
594 * of the IP and TCP headers (see RFC6691). It is also what we advertise
598 tcp_init_rcv_mss (tcp_connection_t * tc)
602 /* Already provided at connection init time */
606 ip_hdr_len = tc->c_is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
607 tc->mss = tcp_cfg.default_mtu - sizeof (tcp_header_t) - ip_hdr_len;
611 tcp_init_mss (tcp_connection_t * tc)
613 u16 default_min_mss = 536;
615 tcp_init_rcv_mss (tc);
617 /* TODO consider PMTU discovery */
618 tc->snd_mss = clib_min (tc->rcv_opts.mss, tc->mss);
620 if (tc->snd_mss < 45)
622 /* Assume that at least the min default mss works */
623 tc->snd_mss = default_min_mss;
624 tc->rcv_opts.mss = default_min_mss;
627 /* We should have enough space for 40 bytes of options */
628 ASSERT (tc->snd_mss > 45);
630 /* If we use timestamp option, account for it */
631 if (tcp_opts_tstamp (&tc->rcv_opts))
632 tc->snd_mss -= TCP_OPTION_LEN_TIMESTAMP;
636 * Initialize connection send variables.
639 tcp_init_snd_vars (tcp_connection_t * tc)
642 * We use the time to randomize iss and for setting up the initial
643 * timestamp. Make sure it's updated otherwise syn and ack in the
644 * handshake may make it look as if time has flown in the opposite
647 tcp_set_time_now (tcp_get_worker (vlib_get_thread_index ()));
649 tcp_init_rcv_mss (tc);
650 tc->iss = tcp_generate_random_iss (tc);
651 tc->snd_una = tc->iss;
652 tc->snd_nxt = tc->iss + 1;
653 tc->snd_una_max = tc->snd_nxt;
654 tc->srtt = 100; /* 100 ms */
656 if (!tcp_cfg.csum_offload)
657 tc->cfg_flags |= TCP_CFG_F_NO_CSUM_OFFLOAD;
661 tcp_enable_pacing (tcp_connection_t * tc)
664 byte_rate = tc->cwnd / (tc->srtt * TCP_TICK);
665 transport_connection_tx_pacer_init (&tc->connection, byte_rate, tc->cwnd);
666 tc->mrtt_us = (u32) ~ 0;
669 /** Initialize tcp connection variables
671 * Should be called after having received a msg from the peer, i.e., a SYN or
672 * a SYNACK, such that connection options have already been exchanged. */
674 tcp_connection_init_vars (tcp_connection_t * tc)
676 tcp_connection_timers_init (tc);
678 scoreboard_init (&tc->sack_sb);
679 if (tc->state == TCP_STATE_SYN_RCVD)
680 tcp_init_snd_vars (tc);
684 if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6))
685 tcp_add_del_adjacency (tc, 1);
687 /* tcp_connection_fib_attach (tc); */
689 if (transport_connection_is_tx_paced (&tc->connection)
690 || tcp_cfg.enable_tx_pacing)
691 tcp_enable_pacing (tc);
693 if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
696 if (!tcp_cfg.allow_tso)
697 tc->cfg_flags |= TCP_CFG_F_NO_TSO;
699 tc->start_ts = tcp_time_now_us (tc->c_thread_index);
703 tcp_alloc_custom_local_endpoint (tcp_main_t * tm, ip46_address_t * lcl_addr,
704 u16 * lcl_port, u8 is_ip4)
709 index = tm->last_v4_addr_rotor++;
710 if (tm->last_v4_addr_rotor >= vec_len (tcp_cfg.ip4_src_addrs))
711 tm->last_v4_addr_rotor = 0;
712 lcl_addr->ip4.as_u32 = tcp_cfg.ip4_src_addrs[index].as_u32;
716 index = tm->last_v6_addr_rotor++;
717 if (tm->last_v6_addr_rotor >= vec_len (tcp_cfg.ip6_src_addrs))
718 tm->last_v6_addr_rotor = 0;
719 clib_memcpy_fast (&lcl_addr->ip6, &tcp_cfg.ip6_src_addrs[index],
720 sizeof (ip6_address_t));
722 port = transport_alloc_local_port (TRANSPORT_PROTO_TCP, lcl_addr);
725 clib_warning ("Failed to allocate src port");
733 tcp_session_open (transport_endpoint_cfg_t * rmt)
735 tcp_main_t *tm = vnet_get_tcp_main ();
736 tcp_connection_t *tc;
737 ip46_address_t lcl_addr;
742 * Allocate local endpoint
744 if ((rmt->is_ip4 && vec_len (tcp_cfg.ip4_src_addrs))
745 || (!rmt->is_ip4 && vec_len (tcp_cfg.ip6_src_addrs)))
746 rv = tcp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port,
749 rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_TCP,
750 rmt, &lcl_addr, &lcl_port);
756 * Create connection and send SYN
758 clib_spinlock_lock_if_init (&tm->half_open_lock);
759 tc = tcp_half_open_connection_new ();
760 ip_copy (&tc->c_rmt_ip, &rmt->ip, rmt->is_ip4);
761 ip_copy (&tc->c_lcl_ip, &lcl_addr, rmt->is_ip4);
762 tc->c_rmt_port = rmt->port;
763 tc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
764 tc->c_is_ip4 = rmt->is_ip4;
765 tc->c_proto = TRANSPORT_PROTO_TCP;
766 tc->c_fib_index = rmt->fib_index;
767 tc->cc_algo = tcp_cc_algo_get (tcp_cfg.cc_algo);
768 /* The other connection vars will be initialized after SYN ACK */
769 tcp_connection_timers_init (tc);
772 TCP_EVT (TCP_EVT_OPEN, tc);
773 tc->state = TCP_STATE_SYN_SENT;
774 tcp_init_snd_vars (tc);
776 clib_spinlock_unlock_if_init (&tm->half_open_lock);
778 return tc->c_c_index;
781 const char *tcp_fsm_states[] = {
782 #define _(sym, str) str,
783 foreach_tcp_fsm_state
788 format_tcp_state (u8 * s, va_list * args)
790 u32 state = va_arg (*args, u32);
792 if (state < TCP_N_STATES)
793 s = format (s, "%s", tcp_fsm_states[state]);
795 s = format (s, "UNKNOWN (%d (0x%x))", state, state);
799 const char *tcp_cfg_flags_str[] = {
800 #define _(sym, str) str,
806 format_tcp_cfg_flags (u8 * s, va_list * args)
808 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
811 for (i = 0; i < TCP_CFG_N_FLAG_BITS; i++)
812 if (tc->cfg_flags & (1 << i))
814 for (i = 0; i < last; i++)
816 if (tc->cfg_flags & (1 << i))
817 s = format (s, "%s, ", tcp_cfg_flags_str[i]);
820 s = format (s, "%s", tcp_cfg_flags_str[last]);
824 const char *tcp_connection_flags_str[] = {
825 #define _(sym, str) str,
826 foreach_tcp_connection_flag
831 format_tcp_connection_flags (u8 * s, va_list * args)
833 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
836 for (i = 0; i < TCP_CONN_N_FLAG_BITS; i++)
837 if (tc->flags & (1 << i))
839 for (i = 0; i < last; i++)
841 if (tc->flags & (1 << i))
842 s = format (s, "%s, ", tcp_connection_flags_str[i]);
845 s = format (s, "%s", tcp_connection_flags_str[last]);
849 const char *tcp_conn_timers[] = {
850 #define _(sym, str) str,
856 format_tcp_timers (u8 * s, va_list * args)
858 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
861 for (i = 0; i < TCP_N_TIMERS; i++)
862 if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID)
865 for (i = 0; i < last; i++)
867 if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID)
868 s = format (s, "%s,", tcp_conn_timers[i]);
872 s = format (s, "%s", tcp_conn_timers[i]);
878 format_tcp_congestion_status (u8 * s, va_list * args)
880 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
881 if (tcp_in_recovery (tc))
882 s = format (s, "recovery");
883 else if (tcp_in_fastrecovery (tc))
884 s = format (s, "fastrecovery");
886 s = format (s, "none");
891 tcp_rcv_wnd_available (tcp_connection_t * tc)
893 return (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las);
897 format_tcp_congestion (u8 * s, va_list * args)
899 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
900 u32 indent = format_get_indent (s), prr_space = 0;
902 s = format (s, "%U ", format_tcp_congestion_status, tc);
903 s = format (s, "algo %s cwnd %u ssthresh %u bytes_acked %u\n",
904 tc->cc_algo->name, tc->cwnd, tc->ssthresh, tc->bytes_acked);
905 s = format (s, "%Ucc space %u prev_cwnd %u prev_ssthresh %u\n",
906 format_white_space, indent, tcp_available_cc_snd_space (tc),
907 tc->prev_cwnd, tc->prev_ssthresh);
908 s = format (s, "%Usnd_cong %u dupack %u limited_tx %u\n",
909 format_white_space, indent, tc->snd_congestion - tc->iss,
910 tc->rcv_dupacks, tc->limited_transmit - tc->iss);
911 s = format (s, "%Urxt_bytes %u rxt_delivered %u rxt_head %u rxt_ts %u\n",
912 format_white_space, indent, tc->snd_rxt_bytes,
913 tc->rxt_delivered, tc->rxt_head - tc->iss,
914 tcp_time_now_w_thread (tc->c_thread_index) - tc->snd_rxt_ts);
915 if (tcp_in_fastrecovery (tc))
916 prr_space = tcp_fastrecovery_prr_snd_space (tc);
917 s = format (s, "%Uprr_start %u prr_delivered %u prr space %u\n",
918 format_white_space, indent, tc->prr_start - tc->iss,
919 tc->prr_delivered, prr_space);
924 format_tcp_stats (u8 * s, va_list * args)
926 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
927 u32 indent = format_get_indent (s);
928 s = format (s, "in segs %lu dsegs %lu bytes %lu dupacks %u\n",
929 tc->segs_in, tc->data_segs_in, tc->bytes_in, tc->dupacks_in);
930 s = format (s, "%Uout segs %lu dsegs %lu bytes %lu dupacks %u\n",
931 format_white_space, indent, tc->segs_out,
932 tc->data_segs_out, tc->bytes_out, tc->dupacks_out);
933 s = format (s, "%Ufr %u tr %u rxt segs %lu bytes %lu duration %.3f\n",
934 format_white_space, indent, tc->fr_occurences,
935 tc->tr_occurences, tc->segs_retrans, tc->bytes_retrans,
936 tcp_time_now_us (tc->c_thread_index) - tc->start_ts);
937 s = format (s, "%Uerr wnd data below %u above %u ack below %u above %u",
938 format_white_space, indent, tc->errors.below_data_wnd,
939 tc->errors.above_data_wnd, tc->errors.below_ack_wnd,
940 tc->errors.above_ack_wnd);
945 format_tcp_vars (u8 * s, va_list * args)
947 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
948 s = format (s, " index: %u cfg: %U flags: %U timers: %U\n", tc->c_c_index,
949 format_tcp_cfg_flags, tc, format_tcp_connection_flags, tc,
950 format_tcp_timers, tc);
951 s = format (s, " snd_una %u snd_nxt %u snd_una_max %u",
952 tc->snd_una - tc->iss, tc->snd_nxt - tc->iss,
953 tc->snd_una_max - tc->iss);
954 s = format (s, " rcv_nxt %u rcv_las %u\n",
955 tc->rcv_nxt - tc->irs, tc->rcv_las - tc->irs);
956 s = format (s, " snd_wnd %u rcv_wnd %u rcv_wscale %u ",
957 tc->snd_wnd, tc->rcv_wnd, tc->rcv_wscale);
958 s = format (s, "snd_wl1 %u snd_wl2 %u\n", tc->snd_wl1 - tc->irs,
959 tc->snd_wl2 - tc->iss);
960 s = format (s, " flight size %u out space %u rcv_wnd_av %u",
961 tcp_flight_size (tc), tcp_available_output_snd_space (tc),
962 tcp_rcv_wnd_available (tc));
963 s = format (s, " tsval_recent %u\n", tc->tsval_recent);
964 s = format (s, " tsecr %u tsecr_last_ack %u tsval_recent_age %u",
965 tc->rcv_opts.tsecr, tc->tsecr_last_ack,
966 tcp_time_now () - tc->tsval_recent_age);
967 s = format (s, " snd_mss %u\n", tc->snd_mss);
968 s = format (s, " rto %u rto_boff %u srtt %u us %.3f rttvar %u rtt_ts %.4f",
969 tc->rto, tc->rto_boff, tc->srtt, tc->mrtt_us * 1000, tc->rttvar,
971 s = format (s, " rtt_seq %u\n", tc->rtt_seq - tc->iss);
972 s = format (s, " next_node %u opaque 0x%x fib_index %u\n",
973 tc->next_node_index, tc->next_node_opaque, tc->c_fib_index);
974 s = format (s, " cong: %U", format_tcp_congestion, tc);
976 if (tc->state >= TCP_STATE_ESTABLISHED)
978 s = format (s, " sboard: %U\n", format_tcp_scoreboard, &tc->sack_sb,
980 s = format (s, " stats: %U\n", format_tcp_stats, tc);
982 if (vec_len (tc->snd_sacks))
983 s = format (s, " sacks tx: %U\n", format_tcp_sacks, tc);
989 format_tcp_connection_id (u8 * s, va_list * args)
991 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
996 s = format (s, "[%d:%d][%s] %U:%d->%U:%d", tc->c_thread_index,
997 tc->c_s_index, "T", format_ip4_address, &tc->c_lcl_ip4,
998 clib_net_to_host_u16 (tc->c_lcl_port), format_ip4_address,
999 &tc->c_rmt_ip4, clib_net_to_host_u16 (tc->c_rmt_port));
1003 s = format (s, "[%d:%d][%s] %U:%d->%U:%d", tc->c_thread_index,
1004 tc->c_s_index, "T", format_ip6_address, &tc->c_lcl_ip6,
1005 clib_net_to_host_u16 (tc->c_lcl_port), format_ip6_address,
1006 &tc->c_rmt_ip6, clib_net_to_host_u16 (tc->c_rmt_port));
1013 format_tcp_connection (u8 * s, va_list * args)
1015 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
1016 u32 verbose = va_arg (*args, u32);
1020 s = format (s, "%-50U", format_tcp_connection_id, tc);
1023 s = format (s, "%-15U", format_tcp_state, tc->state);
1025 s = format (s, "\n%U", format_tcp_vars, tc);
1032 format_tcp_session (u8 * s, va_list * args)
1034 u32 tci = va_arg (*args, u32);
1035 u32 thread_index = va_arg (*args, u32);
1036 u32 verbose = va_arg (*args, u32);
1037 tcp_connection_t *tc;
1039 tc = tcp_connection_get (tci, thread_index);
1041 s = format (s, "%U", format_tcp_connection, tc, verbose);
1043 s = format (s, "empty\n");
1048 format_tcp_listener_session (u8 * s, va_list * args)
1050 u32 tci = va_arg (*args, u32);
1051 u32 __clib_unused thread_index = va_arg (*args, u32);
1052 u32 verbose = va_arg (*args, u32);
1053 tcp_connection_t *tc = tcp_listener_get (tci);
1054 s = format (s, "%-50U", format_tcp_connection_id, tc);
1056 s = format (s, "%-15U", format_tcp_state, tc->state);
1061 format_tcp_half_open_session (u8 * s, va_list * args)
1063 u32 tci = va_arg (*args, u32);
1064 u32 __clib_unused thread_index = va_arg (*args, u32);
1065 tcp_connection_t *tc = tcp_half_open_connection_get (tci);
1066 return format (s, "%U", format_tcp_connection_id, tc);
1070 format_tcp_sacks (u8 * s, va_list * args)
1072 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
1073 sack_block_t *sacks = tc->snd_sacks;
1074 sack_block_t *block;
1077 len = vec_len (sacks);
1078 for (i = 0; i < len - 1; i++)
1081 s = format (s, " start %u end %u\n", block->start - tc->irs,
1082 block->end - tc->irs);
1086 block = &sacks[len - 1];
1087 s = format (s, " start %u end %u", block->start - tc->irs,
1088 block->end - tc->irs);
1094 format_tcp_rcv_sacks (u8 * s, va_list * args)
1096 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
1097 sack_block_t *sacks = tc->rcv_opts.sacks;
1098 sack_block_t *block;
1101 len = vec_len (sacks);
1102 for (i = 0; i < len - 1; i++)
1105 s = format (s, " start %u end %u\n", block->start - tc->iss,
1106 block->end - tc->iss);
1110 block = &sacks[len - 1];
1111 s = format (s, " start %u end %u", block->start - tc->iss,
1112 block->end - tc->iss);
1118 format_tcp_sack_hole (u8 * s, va_list * args)
1120 sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *);
1121 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
1123 s = format (s, " [%u, %u]", hole->start - tc->iss, hole->end - tc->iss);
1125 s = format (s, " [%u, %u]", hole->start, hole->end);
1130 format_tcp_scoreboard (u8 * s, va_list * args)
1132 sack_scoreboard_t *sb = va_arg (*args, sack_scoreboard_t *);
1133 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
1134 sack_scoreboard_hole_t *hole;
1135 u32 indent = format_get_indent (s);
1137 s = format (s, "sacked %u last_sacked %u lost %u last_lost %u"
1139 sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes,
1140 sb->last_lost_bytes, sb->rxt_sacked);
1141 s = format (s, "%Ulast_delivered %u high_sacked %u is_reneging %u\n",
1142 format_white_space, indent, sb->last_bytes_delivered,
1143 sb->high_sacked - tc->iss, sb->is_reneging);
1144 s = format (s, "%Ucur_rxt_hole %u high_rxt %u rescue_rxt %u",
1145 format_white_space, indent, sb->cur_rxt_hole,
1146 sb->high_rxt - tc->iss, sb->rescue_rxt - tc->iss);
1148 hole = scoreboard_first_hole (sb);
1150 s = format (s, "\n%Uhead %u tail %u %u holes:\n%U", format_white_space,
1151 indent, sb->head, sb->tail, pool_elts (sb->holes),
1152 format_white_space, indent);
1156 s = format (s, "%U", format_tcp_sack_hole, hole, tc);
1157 hole = scoreboard_next_hole (sb, hole);
1163 static transport_connection_t *
1164 tcp_session_get_transport (u32 conn_index, u32 thread_index)
1166 tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index);
1167 if (PREDICT_FALSE (!tc))
1169 return &tc->connection;
1172 static transport_connection_t *
1173 tcp_half_open_session_get_transport (u32 conn_index)
1175 tcp_connection_t *tc = tcp_half_open_connection_get (conn_index);
1176 return &tc->connection;
1180 tcp_session_cal_goal_size (tcp_connection_t * tc)
1182 u16 goal_size = tc->snd_mss;
1184 goal_size = TCP_MAX_GSO_SZ - tc->snd_mss % TCP_MAX_GSO_SZ;
1185 goal_size = clib_min (goal_size, tc->snd_wnd / 2);
1187 return goal_size > tc->snd_mss ? goal_size : tc->snd_mss;
1191 * Compute maximum segment size for session layer.
1193 * Since the result needs to be the actual data length, it first computes
1194 * the tcp options to be used in the next burst and subtracts their
1195 * length from the connection's snd_mss.
1198 tcp_session_send_mss (transport_connection_t * trans_conn)
1200 tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
1202 /* Ensure snd_mss does accurately reflect the amount of data we can push
1203 * in a segment. This also makes sure that options are updated according to
1204 * the current state of the connection. */
1205 tcp_update_burst_snd_vars (tc);
1207 if (PREDICT_FALSE (tc->cfg_flags & TCP_CFG_F_TSO))
1208 return tcp_session_cal_goal_size (tc);
1214 tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space)
1216 if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss))
1218 return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0;
1221 /* If not snd_wnd constrained and we can't write at least a segment,
1222 * don't try at all */
1223 if (PREDICT_FALSE (snd_space < tc->snd_mss))
1224 return snd_space < tc->cwnd ? 0 : snd_space;
1226 /* round down to mss multiple */
1227 return snd_space - (snd_space % tc->snd_mss);
1231 * Compute tx window session is allowed to fill.
1233 * Takes into account available send space, snd_mss and the congestion
1234 * state of the connection. If possible, the value returned is a multiple
1237 * @param tc tcp connection
1238 * @return number of bytes session is allowed to write
1241 tcp_snd_space_inline (tcp_connection_t * tc)
1245 if (PREDICT_FALSE (tcp_in_fastrecovery (tc)
1246 || tc->state == TCP_STATE_CLOSED))
1249 snd_space = tcp_available_output_snd_space (tc);
1251 /* If we got dupacks or sacked bytes but we're not yet in recovery, try
1252 * to force the peer to send enough dupacks to start retransmitting as
1253 * per Limited Transmit (RFC3042)
1255 if (PREDICT_FALSE (tc->rcv_dupacks != 0 || tc->sack_sb.sacked_bytes))
1257 if (tc->limited_transmit != tc->snd_nxt
1258 && (seq_lt (tc->limited_transmit, tc->snd_nxt - 2 * tc->snd_mss)
1259 || seq_gt (tc->limited_transmit, tc->snd_nxt)))
1260 tc->limited_transmit = tc->snd_nxt;
1262 ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt));
1264 int snt_limited = tc->snd_nxt - tc->limited_transmit;
1265 snd_space = clib_max ((int) 2 * tc->snd_mss - snt_limited, 0);
1267 return tcp_round_snd_space (tc, snd_space);
1271 tcp_snd_space (tcp_connection_t * tc)
1273 return tcp_snd_space_inline (tc);
1277 tcp_session_send_space (transport_connection_t * trans_conn)
1279 tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
1280 return clib_min (tcp_snd_space_inline (tc),
1281 tc->snd_wnd - (tc->snd_nxt - tc->snd_una));
1285 tcp_session_tx_fifo_offset (transport_connection_t * trans_conn)
1287 tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
1289 ASSERT (seq_geq (tc->snd_nxt, tc->snd_una));
1291 /* This still works if fast retransmit is on */
1292 return (tc->snd_nxt - tc->snd_una);
1296 tcp_timer_waitclose_handler (tcp_connection_t * tc)
1300 case TCP_STATE_CLOSE_WAIT:
1301 tcp_connection_timers_reset (tc);
1302 session_transport_closed_notify (&tc->connection);
1303 /* App never returned with a close */
1304 if (!(tc->flags & TCP_CONN_FINPNDG))
1306 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
1307 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
1308 tcp_worker_stats_inc (tc->c_thread_index, to_closewait, 1);
1312 /* Send FIN either way and switch to LAST_ACK. */
1313 tcp_cong_recovery_off (tc);
1314 /* Make sure we don't try to send unsent data */
1315 tc->snd_nxt = tc->snd_una;
1317 tcp_connection_set_state (tc, TCP_STATE_LAST_ACK);
1319 /* Make sure we don't wait in LAST ACK forever */
1320 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.lastack_time);
1321 tcp_worker_stats_inc (tc->c_thread_index, to_closewait2, 1);
1323 /* Don't delete the connection yet */
1325 case TCP_STATE_FIN_WAIT_1:
1326 tcp_connection_timers_reset (tc);
1327 session_transport_closed_notify (&tc->connection);
1328 if (tc->flags & TCP_CONN_FINPNDG)
1330 /* If FIN pending, we haven't sent everything, but we did try.
1331 * Notify session layer that transport is closed. */
1332 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
1333 tcp_send_reset (tc);
1334 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
1338 /* We've sent the fin but no progress. Close the connection and
1339 * to make sure everything is flushed, setup a cleanup timer */
1340 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
1341 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
1343 tcp_worker_stats_inc (tc->c_thread_index, to_finwait1, 1);
1345 case TCP_STATE_LAST_ACK:
1346 tcp_connection_timers_reset (tc);
1347 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
1348 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
1349 session_transport_closed_notify (&tc->connection);
1350 tcp_worker_stats_inc (tc->c_thread_index, to_lastack, 1);
1352 case TCP_STATE_CLOSING:
1353 tcp_connection_timers_reset (tc);
1354 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
1355 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
1356 session_transport_closed_notify (&tc->connection);
1357 tcp_worker_stats_inc (tc->c_thread_index, to_closing, 1);
1359 case TCP_STATE_FIN_WAIT_2:
1360 tcp_send_reset (tc);
1361 tcp_connection_timers_reset (tc);
1362 tcp_connection_set_state (tc, TCP_STATE_CLOSED);
1363 session_transport_closed_notify (&tc->connection);
1364 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, tcp_cfg.cleanup_time);
1365 tcp_worker_stats_inc (tc->c_thread_index, to_finwait2, 1);
1368 tcp_connection_del (tc);
1374 static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] =
1376 tcp_timer_retransmit_handler,
1377 tcp_timer_delack_handler,
1378 tcp_timer_persist_handler,
1379 tcp_timer_waitclose_handler,
1380 tcp_timer_retransmit_syn_handler,
1385 tcp_dispatch_pending_timers (tcp_worker_ctx_t * wrk)
1387 u32 n_timers, connection_index, timer_id, thread_index, timer_handle;
1388 tcp_connection_t *tc;
1391 if (!(n_timers = clib_fifo_elts (wrk->pending_timers)))
1394 thread_index = wrk->vm->thread_index;
1395 for (i = 0; i < clib_min (n_timers, 32); i++)
1397 clib_fifo_sub1 (wrk->pending_timers, timer_handle);
1398 connection_index = timer_handle & 0x0FFFFFFF;
1399 timer_id = timer_handle >> 28;
1401 if (PREDICT_TRUE (timer_id != TCP_TIMER_RETRANSMIT_SYN))
1402 tc = tcp_connection_get (connection_index, thread_index);
1404 tc = tcp_half_open_connection_get (connection_index);
1406 if (PREDICT_FALSE (!tc))
1409 /* Skip timer if it was rearmed while pending dispatch */
1410 if (PREDICT_FALSE (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID))
1413 (*timer_expiration_handlers[timer_id]) (tc);
1418 * Flush ip lookup tx frames populated by timer pops
1421 tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk)
1423 if (wrk->ip_lookup_tx_frames[0])
1425 vlib_put_frame_to_node (wrk->vm, ip4_lookup_node.index,
1426 wrk->ip_lookup_tx_frames[0]);
1427 wrk->ip_lookup_tx_frames[0] = 0;
1429 if (wrk->ip_lookup_tx_frames[1])
1431 vlib_put_frame_to_node (wrk->vm, ip6_lookup_node.index,
1432 wrk->ip_lookup_tx_frames[1]);
1433 wrk->ip_lookup_tx_frames[1] = 0;
1438 tcp_update_time (f64 now, u8 thread_index)
1440 tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
1442 tcp_set_time_now (wrk);
1443 tw_timer_expire_timers_16t_2w_512sl (&wrk->timer_wheel, now);
1444 tcp_dispatch_pending_timers (wrk);
1445 tcp_flush_frames_to_output (wrk);
1449 tcp_session_flush_data (transport_connection_t * tconn)
1451 tcp_connection_t *tc = (tcp_connection_t *) tconn;
1452 if (tc->flags & TCP_CONN_PSH_PENDING)
1454 tc->flags |= TCP_CONN_PSH_PENDING;
1455 tc->psh_seq = tc->snd_una + transport_max_tx_dequeue (tconn) - 1;
1459 const static transport_proto_vft_t tcp_proto = {
1460 .enable = vnet_tcp_enable_disable,
1461 .start_listen = tcp_session_bind,
1462 .stop_listen = tcp_session_unbind,
1463 .push_header = tcp_session_push_header,
1464 .get_connection = tcp_session_get_transport,
1465 .get_listener = tcp_session_get_listener,
1466 .get_half_open = tcp_half_open_session_get_transport,
1467 .connect = tcp_session_open,
1468 .close = tcp_session_close,
1469 .cleanup = tcp_session_cleanup,
1470 .reset = tcp_session_reset,
1471 .send_mss = tcp_session_send_mss,
1472 .send_space = tcp_session_send_space,
1473 .update_time = tcp_update_time,
1474 .tx_fifo_offset = tcp_session_tx_fifo_offset,
1475 .flush_data = tcp_session_flush_data,
1476 .custom_tx = tcp_session_custom_tx,
1477 .format_connection = format_tcp_session,
1478 .format_listener = format_tcp_listener_session,
1479 .format_half_open = format_tcp_half_open_session,
1480 .transport_options = {
1481 .tx_type = TRANSPORT_TX_PEEK,
1482 .service_type = TRANSPORT_SERVICE_VC,
1488 tcp_connection_tx_pacer_update (tcp_connection_t * tc)
1490 if (!transport_connection_is_tx_paced (&tc->connection))
1493 f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us);
1495 transport_connection_tx_pacer_update (&tc->connection,
1496 tcp_cc_get_pacing_rate (tc),
1497 srtt * CLIB_US_TIME_FREQ);
1501 tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window,
1504 f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us);
1505 transport_connection_tx_pacer_reset (&tc->connection,
1506 tcp_cc_get_pacing_rate (tc),
1508 srtt * CLIB_US_TIME_FREQ);
1512 tcp_expired_timers_dispatch (u32 * expired_timers)
1514 u32 thread_index = vlib_get_thread_index ();
1515 u32 connection_index, timer_id, n_expired;
1516 tcp_worker_ctx_t *wrk;
1517 tcp_connection_t *tc;
1520 wrk = tcp_get_worker (thread_index);
1521 n_expired = vec_len (expired_timers);
1522 tcp_workerp_stats_inc (wrk, timer_expirations, n_expired);
1525 * Invalidate all timer handles before dispatching. This avoids dangling
1526 * index references to timer wheel pool entries that have been freed.
1528 for (i = 0; i < n_expired; i++)
1530 connection_index = expired_timers[i] & 0x0FFFFFFF;
1531 timer_id = expired_timers[i] >> 28;
1533 if (timer_id != TCP_TIMER_RETRANSMIT_SYN)
1534 tc = tcp_connection_get (connection_index, thread_index);
1536 tc = tcp_half_open_connection_get (connection_index);
1538 TCP_EVT (TCP_EVT_TIMER_POP, connection_index, timer_id);
1540 tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
1543 clib_fifo_add (wrk->pending_timers, expired_timers, n_expired);
1547 tcp_initialize_timer_wheels (tcp_main_t * tm)
1549 tw_timer_wheel_16t_2w_512sl_t *tw;
1551 foreach_vlib_main (({
1552 tw = &tm->wrk_ctx[ii].timer_wheel;
1553 tw_timer_wheel_init_16t_2w_512sl (tw, tcp_expired_timers_dispatch,
1554 TCP_TIMER_TICK, ~0);
1555 tw->last_run_time = vlib_time_now (this_vlib_main);
1561 tcp_initialize_iss_seed (tcp_main_t * tm)
1563 u32 default_seed = random_default_seed ();
1564 u64 time_now = clib_cpu_time_now ();
1566 tm->iss_seed.first = (u64) random_u32 (&default_seed) << 32;
1567 tm->iss_seed.second = random_u64 (&time_now);
1570 static clib_error_t *
1571 tcp_main_enable (vlib_main_t * vm)
1573 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1574 u32 num_threads, n_workers, prealloc_conn_per_wrk;
1575 tcp_connection_t *tc __attribute__ ((unused));
1576 tcp_main_t *tm = vnet_get_tcp_main ();
1577 tcp_worker_ctx_t *wrk;
1578 clib_error_t *error = 0;
1581 if ((error = vlib_call_init_function (vm, ip_main_init)))
1583 if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
1585 if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
1592 ip4_register_protocol (IP_PROTOCOL_TCP, tcp4_input_node.index);
1593 ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_input_node.index);
1596 * Initialize data structures
1599 num_threads = 1 /* main thread */ + vtm->n_threads;
1600 vec_validate (tm->wrk_ctx, num_threads - 1);
1601 n_workers = num_threads == 1 ? 1 : vtm->n_threads;
1602 prealloc_conn_per_wrk = tcp_cfg.preallocated_connections / n_workers;
1604 for (thread = 0; thread < num_threads; thread++)
1606 wrk = &tm->wrk_ctx[thread];
1608 vec_validate (wrk->pending_deq_acked, 255);
1609 vec_validate (wrk->pending_disconnects, 255);
1610 vec_validate (wrk->pending_resets, 255);
1611 vec_reset_length (wrk->pending_deq_acked);
1612 vec_reset_length (wrk->pending_disconnects);
1613 vec_reset_length (wrk->pending_resets);
1614 wrk->vm = vlib_mains[thread];
1617 * Preallocate connections. Assume that thread 0 won't
1618 * use preallocated threads when running multi-core
1620 if ((thread > 0 || num_threads == 1) && prealloc_conn_per_wrk)
1621 pool_init_fixed (wrk->connections, prealloc_conn_per_wrk);
1625 * Use a preallocated half-open connection pool?
1627 if (tcp_cfg.preallocated_half_open_connections)
1628 pool_init_fixed (tm->half_open_connections,
1629 tcp_cfg.preallocated_half_open_connections);
1631 /* Initialize clocks per tick for TCP timestamp. Used to compute
1632 * monotonically increasing timestamps. */
1633 tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
1634 / TCP_TSTAMP_RESOLUTION;
1636 if (num_threads > 1)
1638 clib_spinlock_init (&tm->half_open_lock);
1641 tcp_initialize_timer_wheels (tm);
1642 tcp_initialize_iss_seed (tm);
1644 tm->bytes_per_buffer = vlib_buffer_get_default_data_size (vm);
1645 tm->cc_last_type = TCP_CC_LAST;
1650 vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en)
1654 if (tcp_main.is_enabled)
1657 return tcp_main_enable (vm);
1661 tcp_main.is_enabled = 0;
1668 tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
1670 tcp_main_t *tm = &tcp_main;
1672 tm->punt_unknown4 = is_add;
1674 tm->punt_unknown6 = is_add;
1678 * Initialize default values for tcp parameters
1681 tcp_configuration_init (void)
1683 /* Initial wnd for SYN. Fifos are not allocated at that point so use some
1684 * predefined value. For SYN-ACK we still want the scale to be computed in
1686 tcp_cfg.max_rx_fifo = 32 << 20;
1687 tcp_cfg.min_rx_fifo = 4 << 10;
1689 tcp_cfg.default_mtu = 1500;
1690 tcp_cfg.initial_cwnd_multiplier = 0;
1691 tcp_cfg.enable_tx_pacing = 1;
1692 tcp_cfg.allow_tso = 0;
1693 tcp_cfg.csum_offload = 1;
1694 tcp_cfg.cc_algo = TCP_CC_NEWRENO;
1695 tcp_cfg.rwnd_min_update_ack = 1;
1697 /* Time constants defined as timer tick (100ms) multiples */
1698 tcp_cfg.delack_time = 1; /* 0.1s */
1699 tcp_cfg.closewait_time = 20; /* 2s */
1700 tcp_cfg.timewait_time = 100; /* 10s */
1701 tcp_cfg.finwait1_time = 600; /* 60s */
1702 tcp_cfg.lastack_time = 300; /* 30s */
1703 tcp_cfg.finwait2_time = 300; /* 30s */
1704 tcp_cfg.closing_time = 300; /* 30s */
1705 tcp_cfg.cleanup_time = 1; /* 0.1s */
1708 static clib_error_t *
1709 tcp_init (vlib_main_t * vm)
1711 tcp_main_t *tm = vnet_get_tcp_main ();
1712 ip_main_t *im = &ip_main;
1713 ip_protocol_info_t *pi;
1715 /* Session layer, and by implication tcp, are disabled by default */
1718 /* Register with IP for header parsing */
1719 pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP);
1721 return clib_error_return (0, "TCP protocol info AWOL");
1722 pi->format_header = format_tcp_header;
1723 pi->unformat_pg_edit = unformat_pg_tcp_header;
1725 /* Register as transport with session layer */
1726 transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto,
1727 FIB_PROTOCOL_IP4, tcp4_output_node.index);
1728 transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto,
1729 FIB_PROTOCOL_IP6, tcp6_output_node.index);
1731 tcp_api_reference ();
1732 tcp_configuration_init ();
1734 tm->cc_algo_by_name = hash_create_string (0, sizeof (uword));
1739 VLIB_INIT_FUNCTION (tcp_init);
1742 unformat_tcp_cc_algo (unformat_input_t * input, va_list * va)
1744 tcp_cc_algorithm_type_e *result = va_arg (*va, tcp_cc_algorithm_type_e *);
1745 tcp_main_t *tm = &tcp_main;
1750 if (unformat (input, "%s", &cc_algo_name)
1751 && ((p = hash_get_mem (tm->cc_algo_by_name, cc_algo_name))))
1757 vec_free (cc_algo_name);
1762 unformat_tcp_cc_algo_cfg (unformat_input_t * input, va_list * va)
1764 tcp_main_t *tm = vnet_get_tcp_main ();
1765 tcp_cc_algorithm_t *cc_alg;
1766 unformat_input_t sub_input;
1769 vec_foreach (cc_alg, tm->cc_algos)
1771 if (!unformat (input, cc_alg->name))
1774 if (cc_alg->unformat_cfg
1775 && unformat (input, "%U", unformat_vlib_cli_sub_input, &sub_input))
1777 if (cc_alg->unformat_cfg (&sub_input))
1784 static clib_error_t *
1785 tcp_config_fn (vlib_main_t * vm, unformat_input_t * input)
1787 u32 cwnd_multiplier, tmp_time;
1790 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1792 if (unformat (input, "preallocated-connections %d",
1793 &tcp_cfg.preallocated_connections))
1795 else if (unformat (input, "preallocated-half-open-connections %d",
1796 &tcp_cfg.preallocated_half_open_connections))
1798 else if (unformat (input, "buffer-fail-fraction %f",
1799 &tcp_cfg.buffer_fail_fraction))
1801 else if (unformat (input, "max-rx-fifo %U", unformat_memory_size,
1804 if (memory_size >= 0x100000000)
1806 return clib_error_return
1807 (0, "max-rx-fifo %llu (0x%llx) too large", memory_size,
1810 tcp_cfg.max_rx_fifo = memory_size;
1812 else if (unformat (input, "min-rx-fifo %U", unformat_memory_size,
1815 if (memory_size >= 0x100000000)
1817 return clib_error_return
1818 (0, "min-rx-fifo %llu (0x%llx) too large", memory_size,
1821 tcp_cfg.min_rx_fifo = memory_size;
1823 else if (unformat (input, "mtu %u", &tcp_cfg.default_mtu))
1825 else if (unformat (input, "rwnd-min-update-ack %d",
1826 &tcp_cfg.rwnd_min_update_ack))
1828 else if (unformat (input, "initial-cwnd-multiplier %u",
1830 tcp_cfg.initial_cwnd_multiplier = cwnd_multiplier;
1831 else if (unformat (input, "no-tx-pacing"))
1832 tcp_cfg.enable_tx_pacing = 0;
1833 else if (unformat (input, "tso"))
1834 tcp_cfg.allow_tso = 1;
1835 else if (unformat (input, "no-csum-offload"))
1836 tcp_cfg.csum_offload = 0;
1837 else if (unformat (input, "cc-algo %U", unformat_tcp_cc_algo,
1840 else if (unformat (input, "%U", unformat_tcp_cc_algo_cfg))
1842 else if (unformat (input, "closewait-time %u", &tmp_time))
1843 tcp_cfg.closewait_time = tmp_time / TCP_TIMER_TICK;
1844 else if (unformat (input, "timewait-time %u", &tmp_time))
1845 tcp_cfg.timewait_time = tmp_time / TCP_TIMER_TICK;
1846 else if (unformat (input, "finwait1-time %u", &tmp_time))
1847 tcp_cfg.finwait1_time = tmp_time / TCP_TIMER_TICK;
1848 else if (unformat (input, "finwait2-time %u", &tmp_time))
1849 tcp_cfg.finwait2_time = tmp_time / TCP_TIMER_TICK;
1850 else if (unformat (input, "lastack-time %u", &tmp_time))
1851 tcp_cfg.lastack_time = tmp_time / TCP_TIMER_TICK;
1852 else if (unformat (input, "closing-time %u", &tmp_time))
1853 tcp_cfg.closing_time = tmp_time / TCP_TIMER_TICK;
1854 else if (unformat (input, "cleanup-time %u", &tmp_time))
1855 tcp_cfg.cleanup_time = tmp_time / TCP_TIMER_TICK;
1857 return clib_error_return (0, "unknown input `%U'",
1858 format_unformat_error, input);
1863 VLIB_CONFIG_FUNCTION (tcp_config_fn, "tcp");
1867 * \brief Configure an ipv4 source address range
1868 * @param vm vlib_main_t pointer
1869 * @param start first ipv4 address in the source address range
1870 * @param end last ipv4 address in the source address range
1871 * @param table_id VRF / table ID, 0 for the default FIB
1872 * @return 0 if all OK, else an error indication from api_errno.h
1876 tcp_configure_v4_source_address_range (vlib_main_t * vm,
1877 ip4_address_t * start,
1878 ip4_address_t * end, u32 table_id)
1880 u32 start_host_byte_order, end_host_byte_order;
1881 fib_prefix_t prefix;
1882 fib_node_index_t fei;
1887 clib_memset (&prefix, 0, sizeof (prefix));
1889 fib_index = fib_table_find (FIB_PROTOCOL_IP4, table_id);
1891 if (fib_index == ~0)
1892 return VNET_API_ERROR_NO_SUCH_FIB;
1894 start_host_byte_order = clib_net_to_host_u32 (start->as_u32);
1895 end_host_byte_order = clib_net_to_host_u32 (end->as_u32);
1897 /* sanity check for reversed args or some such */
1898 if ((end_host_byte_order - start_host_byte_order) > (10 << 10))
1899 return VNET_API_ERROR_INVALID_ARGUMENT;
1901 /* Lookup the last address, to identify the interface involved */
1903 prefix.fp_proto = FIB_PROTOCOL_IP4;
1904 memcpy (&prefix.fp_addr.ip4, end, sizeof (ip4_address_t));
1906 fei = fib_table_lookup (fib_index, &prefix);
1908 /* Couldn't find route to destination. Bail out. */
1909 if (fei == FIB_NODE_INDEX_INVALID)
1910 return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB;
1912 sw_if_index = fib_entry_get_resolving_interface (fei);
1914 /* Configure proxy arp across the range */
1915 rv = ip4_neighbor_proxy_add (fib_index, start, end);
1920 rv = ip4_neighbor_proxy_enable (sw_if_index);
1927 dpo_id_t dpo = DPO_INVALID;
1929 vec_add1 (tcp_cfg.ip4_src_addrs, start[0]);
1931 /* Add local adjacencies for the range */
1933 receive_dpo_add_or_lock (DPO_PROTO_IP4, ~0 /* sw_if_index */ ,
1936 prefix.fp_proto = FIB_PROTOCOL_IP4;
1937 prefix.fp_addr.ip4.as_u32 = start->as_u32;
1939 fib_table_entry_special_dpo_update (fib_index,
1942 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
1945 start_host_byte_order++;
1946 start->as_u32 = clib_host_to_net_u32 (start_host_byte_order);
1948 while (start_host_byte_order <= end_host_byte_order);
1954 * \brief Configure an ipv6 source address range
1955 * @param vm vlib_main_t pointer
1956 * @param start first ipv6 address in the source address range
1957 * @param end last ipv6 address in the source address range
1958 * @param table_id VRF / table ID, 0 for the default FIB
1959 * @return 0 if all OK, else an error indication from api_errno.h
1963 tcp_configure_v6_source_address_range (vlib_main_t * vm,
1964 ip6_address_t * start,
1965 ip6_address_t * end, u32 table_id)
1967 fib_prefix_t prefix;
1969 fib_node_index_t fei;
1972 clib_memset (&prefix, 0, sizeof (prefix));
1974 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
1976 if (fib_index == ~0)
1977 return VNET_API_ERROR_NO_SUCH_FIB;
1983 dpo_id_t dpo = DPO_INVALID;
1985 /* Remember this address */
1986 vec_add1 (tcp_cfg.ip6_src_addrs, start[0]);
1988 /* Lookup the prefix, to identify the interface involved */
1989 prefix.fp_len = 128;
1990 prefix.fp_proto = FIB_PROTOCOL_IP6;
1991 memcpy (&prefix.fp_addr.ip6, start, sizeof (ip6_address_t));
1993 fei = fib_table_lookup (fib_index, &prefix);
1995 /* Couldn't find route to destination. Bail out. */
1996 if (fei == FIB_NODE_INDEX_INVALID)
1997 return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB;
1999 sw_if_index = fib_entry_get_resolving_interface (fei);
2001 if (sw_if_index == (u32) ~ 0)
2002 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2004 /* Add a proxy neighbor discovery entry for this address */
2005 ip6_neighbor_proxy_add (sw_if_index, start);
2007 /* Add a receive adjacency for this address */
2008 receive_dpo_add_or_lock (DPO_PROTO_IP6, ~0 /* sw_if_index */ ,
2011 fib_table_entry_special_dpo_update (fib_index,
2014 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
2017 /* Done with the entire range? */
2018 if (!memcmp (start, end, sizeof (start[0])))
2021 /* Increment the address. DGMS. */
2023 for (i = 15; i >= 0; i--)
2026 if (tmp.as_u8[i] != 0)
2034 static clib_error_t *
2035 tcp_src_address_fn (vlib_main_t * vm,
2036 unformat_input_t * input, vlib_cli_command_t * cmd_arg)
2038 ip4_address_t v4start, v4end;
2039 ip6_address_t v6start, v6end;
2045 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2047 if (unformat (input, "%U - %U", unformat_ip4_address, &v4start,
2048 unformat_ip4_address, &v4end))
2050 else if (unformat (input, "%U", unformat_ip4_address, &v4start))
2052 memcpy (&v4end, &v4start, sizeof (v4start));
2055 else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start,
2056 unformat_ip6_address, &v6end))
2058 else if (unformat (input, "%U", unformat_ip6_address, &v6start))
2060 memcpy (&v6end, &v6start, sizeof (v6start));
2063 else if (unformat (input, "fib-table %d", &table_id))
2069 if (!v4set && !v6set)
2070 return clib_error_return (0, "at least one v4 or v6 address required");
2074 rv = tcp_configure_v4_source_address_range (vm, &v4start, &v4end,
2081 case VNET_API_ERROR_NO_SUCH_FIB:
2082 return clib_error_return (0, "Invalid table-id %d", table_id);
2084 case VNET_API_ERROR_INVALID_ARGUMENT:
2085 return clib_error_return (0, "Invalid address range %U - %U",
2086 format_ip4_address, &v4start,
2087 format_ip4_address, &v4end);
2089 return clib_error_return (0, "error %d", rv);
2095 rv = tcp_configure_v6_source_address_range (vm, &v6start, &v6end,
2102 case VNET_API_ERROR_NO_SUCH_FIB:
2103 return clib_error_return (0, "Invalid table-id %d", table_id);
2106 return clib_error_return (0, "error %d", rv);
2114 VLIB_CLI_COMMAND (tcp_src_address_command, static) =
2116 .path = "tcp src-address",
2117 .short_help = "tcp src-address <ip-addr> [- <ip-addr>] add src address range",
2118 .function = tcp_src_address_fn,
2123 tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb)
2125 #if TCP_SCOREBOARD_TRACE
2127 scoreboard_trace_elt_t *block;
2133 s = format (s, "scoreboard trace:");
2134 vec_foreach (block, sb->trace)
2136 s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end,
2137 block->ack, block->snd_una_max, block->group);
2139 s = format (s, "\n");
2147 static clib_error_t *
2148 tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input,
2149 vlib_cli_command_t * cmd_arg)
2151 transport_connection_t *tconn = 0;
2152 tcp_connection_t *tc;
2154 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2156 if (unformat (input, "%U", unformat_transport_connection, &tconn,
2157 TRANSPORT_PROTO_TCP))
2160 return clib_error_return (0, "unknown input `%U'",
2161 format_unformat_error, input);
2164 if (!TCP_SCOREBOARD_TRACE)
2166 vlib_cli_output (vm, "scoreboard tracing not enabled");
2170 tc = tcp_get_connection_from_transport (tconn);
2171 s = tcp_scoreboard_dump_trace (s, &tc->sack_sb);
2172 vlib_cli_output (vm, "%v", s);
2177 VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) =
2179 .path = "show tcp scoreboard trace",
2180 .short_help = "show tcp scoreboard trace <connection>",
2181 .function = tcp_show_scoreboard_trace_fn,
2186 tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose)
2189 scoreboard_trace_elt_t *trace;
2190 u32 next_ack, left, group, has_new_ack = 0;
2191 tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc;
2192 sack_block_t *block;
2194 if (!TCP_SCOREBOARD_TRACE)
2196 s = format (s, "scoreboard tracing not enabled");
2203 clib_memset (dummy_tc, 0, sizeof (*dummy_tc));
2204 tcp_connection_timers_init (dummy_tc);
2205 scoreboard_init (&dummy_tc->sack_sb);
2206 dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK;
2208 #if TCP_SCOREBOARD_TRACE
2209 trace = tc->sack_sb.trace;
2210 trace_len = vec_len (tc->sack_sb.trace);
2213 for (i = 0; i < trace_len; i++)
2215 if (trace[i].ack != 0)
2217 dummy_tc->snd_una = trace[i].ack - 1448;
2218 dummy_tc->snd_una_max = trace[i].ack;
2223 while (left < trace_len)
2225 group = trace[left].group;
2226 vec_reset_length (dummy_tc->rcv_opts.sacks);
2228 while (trace[left].group == group)
2230 if (trace[left].ack != 0)
2233 s = format (s, "Adding ack %u, snd_una_max %u, segs: ",
2234 trace[left].ack, trace[left].snd_una_max);
2235 dummy_tc->snd_una_max = trace[left].snd_una_max;
2236 next_ack = trace[left].ack;
2242 s = format (s, "[%u, %u], ", trace[left].start,
2244 vec_add2 (dummy_tc->rcv_opts.sacks, block, 1);
2245 block->start = trace[left].start;
2246 block->end = trace[left].end;
2252 tcp_rcv_sacks (dummy_tc, next_ack);
2254 dummy_tc->snd_una = next_ack;
2257 s = format (s, "result: %U", format_tcp_scoreboard,
2258 &dummy_tc->sack_sb);
2261 s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb);
2266 static clib_error_t *
2267 tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input,
2268 vlib_cli_command_t * cmd_arg)
2270 transport_connection_t *tconn = 0;
2271 tcp_connection_t *tc = 0;
2273 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2275 if (unformat (input, "%U", unformat_transport_connection, &tconn,
2276 TRANSPORT_PROTO_TCP))
2279 return clib_error_return (0, "unknown input `%U'",
2280 format_unformat_error, input);
2283 if (!TCP_SCOREBOARD_TRACE)
2285 vlib_cli_output (vm, "scoreboard tracing not enabled");
2289 tc = tcp_get_connection_from_transport (tconn);
2292 vlib_cli_output (vm, "connection not found");
2295 str = tcp_scoreboard_replay (str, tc, 1);
2296 vlib_cli_output (vm, "%v", str);
2301 VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) =
2303 .path = "tcp replay scoreboard",
2304 .short_help = "tcp replay scoreboard <connection>",
2305 .function = tcp_scoreboard_trace_fn,
2309 static clib_error_t *
2310 show_tcp_punt_fn (vlib_main_t * vm, unformat_input_t * input,
2311 vlib_cli_command_t * cmd_arg)
2313 tcp_main_t *tm = vnet_get_tcp_main ();
2314 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2315 return clib_error_return (0, "unknown input `%U'", format_unformat_error,
2317 vlib_cli_output (vm, "IPv4 TCP punt: %s",
2318 tm->punt_unknown4 ? "enabled" : "disabled");
2319 vlib_cli_output (vm, "IPv6 TCP punt: %s",
2320 tm->punt_unknown6 ? "enabled" : "disabled");
2324 VLIB_CLI_COMMAND (show_tcp_punt_command, static) =
2326 .path = "show tcp punt",
2327 .short_help = "show tcp punt",
2328 .function = show_tcp_punt_fn,
2332 static clib_error_t *
2333 show_tcp_stats_fn (vlib_main_t * vm, unformat_input_t * input,
2334 vlib_cli_command_t * cmd)
2336 tcp_main_t *tm = vnet_get_tcp_main ();
2337 tcp_worker_ctx_t *wrk;
2340 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2341 return clib_error_return (0, "unknown input `%U'", format_unformat_error,
2343 for (thread = 0; thread < vec_len (tm->wrk_ctx); thread++)
2345 wrk = tcp_get_worker (thread);
2346 vlib_cli_output (vm, "Thread %u:\n", thread);
2348 if (clib_fifo_elts (wrk->pending_timers))
2349 vlib_cli_output (vm, " %lu pending timers",
2350 clib_fifo_elts (wrk->pending_timers));
2352 #define _(name,type,str) \
2353 if (wrk->stats.name) \
2354 vlib_cli_output (vm, " %lu %s", wrk->stats.name, str);
2355 foreach_tcp_wrk_stat
2363 VLIB_CLI_COMMAND (show_tcp_stats_command, static) =
2365 .path = "show tcp stats",
2366 .short_help = "show tcp stats",
2367 .function = show_tcp_stats_fn,
2371 static clib_error_t *
2372 clear_tcp_stats_fn (vlib_main_t * vm, unformat_input_t * input,
2373 vlib_cli_command_t * cmd)
2375 tcp_main_t *tm = vnet_get_tcp_main ();
2376 tcp_worker_ctx_t *wrk;
2379 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2380 return clib_error_return (0, "unknown input `%U'", format_unformat_error,
2383 for (thread = 0; thread < vec_len (tm->wrk_ctx); thread++)
2385 wrk = tcp_get_worker (thread);
2386 clib_memset (&wrk->stats, 0, sizeof (wrk->stats));
2393 VLIB_CLI_COMMAND (clear_tcp_stats_command, static) =
2395 .path = "clear tcp stats",
2396 .short_help = "clear tcp stats",
2397 .function = clear_tcp_stats_fn,
2402 * fd.io coding-style-patch-verification: ON
2405 * eval: (c-set-style "gnu")