2 * Copyright (c) 2016 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/ip6_neighbor.h>
32 tcp_connection_bind (u32 session_index, transport_endpoint_t * lcl)
34 tcp_main_t *tm = &tcp_main;
35 tcp_connection_t *listener;
37 pool_get (tm->listener_pool, listener);
38 memset (listener, 0, sizeof (*listener));
40 listener->c_c_index = listener - tm->listener_pool;
41 listener->c_lcl_port = lcl->port;
45 listener->c_lcl_ip4.as_u32 = lcl->ip.ip4.as_u32;
46 listener->c_is_ip4 = 1;
50 clib_memcpy (&listener->c_lcl_ip6, &lcl->ip.ip6,
51 sizeof (ip6_address_t));
54 listener->c_transport_proto = TRANSPORT_PROTO_TCP;
55 listener->c_s_index = session_index;
56 listener->state = TCP_STATE_LISTEN;
58 tcp_connection_timers_init (listener);
60 TCP_EVT_DBG (TCP_EVT_BIND, listener);
62 return listener->c_c_index;
66 tcp_session_bind (u32 session_index, transport_endpoint_t * tep)
68 return tcp_connection_bind (session_index, tep);
72 tcp_connection_unbind (u32 listener_index)
74 tcp_main_t *tm = vnet_get_tcp_main ();
77 tc = pool_elt_at_index (tm->listener_pool, listener_index);
79 TCP_EVT_DBG (TCP_EVT_UNBIND, tc);
81 /* Poison the entry */
83 memset (tc, 0xFA, sizeof (*tc));
85 pool_put_index (tm->listener_pool, listener_index);
89 tcp_session_unbind (u32 listener_index)
91 tcp_connection_unbind (listener_index);
95 transport_connection_t *
96 tcp_session_get_listener (u32 listener_index)
98 tcp_main_t *tm = vnet_get_tcp_main ();
100 tc = pool_elt_at_index (tm->listener_pool, listener_index);
101 return &tc->connection;
105 transport_endpoint_del (u32 tepi)
107 tcp_main_t *tm = vnet_get_tcp_main ();
108 clib_spinlock_lock_if_init (&tm->local_endpoints_lock);
109 pool_put_index (tm->local_endpoints, tepi);
110 clib_spinlock_unlock_if_init (&tm->local_endpoints_lock);
113 always_inline transport_endpoint_t *
114 transport_endpoint_new (void)
116 tcp_main_t *tm = vnet_get_tcp_main ();
117 transport_endpoint_t *tep;
118 pool_get (tm->local_endpoints, tep);
123 * Cleanup half-open connection
127 tcp_half_open_connection_del (tcp_connection_t * tc)
129 tcp_main_t *tm = vnet_get_tcp_main ();
130 clib_spinlock_lock_if_init (&tm->half_open_lock);
131 pool_put_index (tm->half_open_connections, tc->c_c_index);
133 memset (tc, 0xFA, sizeof (*tc));
134 clib_spinlock_unlock_if_init (&tm->half_open_lock);
138 * Try to cleanup half-open connection
140 * If called from a thread that doesn't own tc, the call won't have any
143 * @param tc - connection to be cleaned up
144 * @return non-zero if cleanup failed.
147 tcp_half_open_connection_cleanup (tcp_connection_t * tc)
149 /* Make sure this is the owning thread */
150 if (tc->c_thread_index != vlib_get_thread_index ())
152 tcp_timer_reset (tc, TCP_TIMER_ESTABLISH);
153 tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT_SYN);
154 tcp_half_open_connection_del (tc);
159 tcp_half_open_connection_new (void)
161 tcp_main_t *tm = vnet_get_tcp_main ();
162 tcp_connection_t *tc = 0;
163 ASSERT (vlib_get_thread_index () == 0);
164 pool_get (tm->half_open_connections, tc);
165 memset (tc, 0, sizeof (*tc));
166 tc->c_c_index = tc - tm->half_open_connections;
171 * Cleans up connection state.
176 tcp_connection_cleanup (tcp_connection_t * tc)
178 tcp_main_t *tm = &tcp_main;
180 transport_endpoint_t *tep;
182 /* Cleanup local endpoint if this was an active connect */
183 tepi = transport_endpoint_lookup (&tm->local_endpoints_table, &tc->c_lcl_ip,
184 clib_net_to_host_u16 (tc->c_lcl_port));
185 if (tepi != TRANSPORT_ENDPOINT_INVALID_INDEX)
187 tep = pool_elt_at_index (tm->local_endpoints, tepi);
188 transport_endpoint_table_del (&tm->local_endpoints_table, tep);
189 transport_endpoint_del (tepi);
192 /* Check if connection is not yet fully established */
193 if (tc->state == TCP_STATE_SYN_SENT)
195 /* Try to remove the half-open connection. If this is not the owning
196 * thread, tc won't be removed. Retransmit or establish timers will
197 * eventually expire and call again cleanup on the right thread. */
198 tcp_half_open_connection_cleanup (tc);
202 int thread_index = tc->c_thread_index;
204 /* Make sure all timers are cleared */
205 tcp_connection_timers_reset (tc);
207 /* Poison the entry */
209 memset (tc, 0xFA, sizeof (*tc));
210 pool_put (tm->connections[thread_index], tc);
215 * Connection removal.
217 * This should be called only once connection enters CLOSED state. Note
218 * that it notifies the session of the removal event, so if the goal is to
219 * just remove the connection, call tcp_connection_cleanup instead.
222 tcp_connection_del (tcp_connection_t * tc)
224 TCP_EVT_DBG (TCP_EVT_DELETE, tc);
225 stream_session_delete_notify (&tc->connection);
226 tcp_connection_cleanup (tc);
230 tcp_connection_new (u8 thread_index)
232 tcp_main_t *tm = vnet_get_tcp_main ();
233 tcp_connection_t *tc;
235 pool_get (tm->connections[thread_index], tc);
236 memset (tc, 0, sizeof (*tc));
237 tc->c_c_index = tc - tm->connections[thread_index];
238 tc->c_thread_index = thread_index;
242 /** Notify session that connection has been reset.
244 * Switch state to closed and wait for session to call cleanup.
247 tcp_connection_reset (tcp_connection_t * tc)
249 TCP_EVT_DBG (TCP_EVT_RST_RCVD, tc);
252 case TCP_STATE_SYN_RCVD:
253 /* Cleanup everything. App wasn't notified yet */
254 stream_session_delete_notify (&tc->connection);
255 tcp_connection_cleanup (tc);
257 case TCP_STATE_SYN_SENT:
258 stream_session_connect_notify (&tc->connection, 1 /* fail */ );
259 tcp_connection_cleanup (tc);
261 case TCP_STATE_ESTABLISHED:
262 case TCP_STATE_CLOSE_WAIT:
263 case TCP_STATE_FIN_WAIT_1:
264 case TCP_STATE_FIN_WAIT_2:
265 case TCP_STATE_CLOSING:
266 tc->state = TCP_STATE_CLOSED;
267 TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
269 /* Make sure all timers are cleared */
270 tcp_connection_timers_reset (tc);
271 stream_session_reset_notify (&tc->connection);
273 /* Wait for cleanup from session layer but not forever */
274 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME);
276 case TCP_STATE_CLOSED:
282 * Begin connection closing procedure.
284 * If at the end the connection is not in CLOSED state, it is not removed.
285 * Instead, we rely on on TCP to advance through state machine to either
286 * 1) LAST_ACK (passive close) whereby when the last ACK is received
287 * tcp_connection_del is called. This notifies session of the delete and
289 * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers
290 * and cleanup is called.
292 * N.B. Half-close connections are not supported
295 tcp_connection_close (tcp_connection_t * tc)
297 TCP_EVT_DBG (TCP_EVT_CLOSE, tc);
299 /* Send/Program FIN if needed and switch state */
302 case TCP_STATE_SYN_SENT:
303 tc->state = TCP_STATE_CLOSED;
305 case TCP_STATE_SYN_RCVD:
307 tc->state = TCP_STATE_FIN_WAIT_1;
309 case TCP_STATE_ESTABLISHED:
310 if (!stream_session_tx_fifo_max_dequeue (&tc->connection))
313 tc->flags |= TCP_CONN_FINPNDG;
314 tc->state = TCP_STATE_FIN_WAIT_1;
316 case TCP_STATE_CLOSE_WAIT:
318 tc->state = TCP_STATE_LAST_ACK;
320 case TCP_STATE_FIN_WAIT_1:
323 clib_warning ("state: %u", tc->state);
326 TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
328 /* If in CLOSED and WAITCLOSE timer is not set, delete connection now */
329 if (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID
330 && tc->state == TCP_STATE_CLOSED)
331 tcp_connection_del (tc);
335 tcp_session_close (u32 conn_index, u32 thread_index)
337 tcp_connection_t *tc;
338 tc = tcp_connection_get (conn_index, thread_index);
339 tcp_connection_close (tc);
343 tcp_session_cleanup (u32 conn_index, u32 thread_index)
345 tcp_connection_t *tc;
346 tc = tcp_connection_get (conn_index, thread_index);
348 /* Wait for the session tx events to clear */
349 tc->state = TCP_STATE_CLOSED;
350 TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
351 tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME);
355 ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4)
357 ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
358 ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
359 ip_interface_address_t *ia = 0;
364 foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
366 return ip_interface_address_get_address (lm4, ia);
373 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
376 rv = ip_interface_address_get_address (lm6, ia);
377 /* Trying to use a link-local ip6 src address is a fool's errand */
378 if (!ip6_address_is_link_local_unicast (rv))
387 #define PORT_MASK ((1 << 16)- 1)
389 * Allocate local port and add if successful add entry to local endpoint
390 * table to mark the pair as used.
393 tcp_allocate_local_port (ip46_address_t * ip)
395 tcp_main_t *tm = vnet_get_tcp_main ();
396 transport_endpoint_t *tep;
398 u16 min = 1024, max = 65535; /* XXX configurable ? */
403 /* Only support active opens from thread 0 */
404 ASSERT (vlib_get_thread_index () == 0);
406 /* Search for first free slot */
407 for (tries = 0; tries < limit; tries++)
411 /* Find a port in the specified range */
414 port = random_u32 (&tm->port_allocator_seed) & PORT_MASK;
415 if (PREDICT_TRUE (port >= min && port < max))
420 tei = transport_endpoint_lookup (&tm->local_endpoints_table, ip, port);
421 /* If not found, we're done */
422 if (tei == TRANSPORT_ENDPOINT_INVALID_INDEX)
424 clib_spinlock_lock_if_init (&tm->local_endpoints_lock);
425 tep = transport_endpoint_new ();
426 clib_memcpy (&tep->ip, ip, sizeof (*ip));
428 transport_endpoint_table_add (&tm->local_endpoints_table, tep,
429 tep - tm->local_endpoints);
430 clib_spinlock_unlock_if_init (&tm->local_endpoints_lock);
439 * Initialize all connection timers as invalid
442 tcp_connection_timers_init (tcp_connection_t * tc)
446 /* Set all to invalid */
447 for (i = 0; i < TCP_N_TIMERS; i++)
449 tc->timers[i] = TCP_TIMER_HANDLE_INVALID;
452 tc->rto = TCP_RTO_INIT;
456 * Stop all connection timers
459 tcp_connection_timers_reset (tcp_connection_t * tc)
462 for (i = 0; i < TCP_N_TIMERS; i++)
464 tcp_timer_reset (tc, i);
469 typedef struct ip4_tcp_hdr
475 typedef struct ip6_tcp_hdr
482 tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo,
485 const dpo_id_t *choice;
489 lb = load_balance_get (dpo->dpoi_index);
493 memset (&hdr, 0, sizeof (hdr));
494 hdr.ip.protocol = IP_PROTOCOL_TCP;
495 hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32;
496 hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32;
497 hdr.tcp.src_port = tc->c_lcl_port;
498 hdr.tcp.dst_port = tc->c_rmt_port;
499 hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config);
504 memset (&hdr, 0, sizeof (hdr));
505 hdr.ip.protocol = IP_PROTOCOL_TCP;
506 clib_memcpy (&hdr.ip.src_address, &tc->c_lcl_ip.ip6,
507 sizeof (ip6_address_t));
508 clib_memcpy (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6,
509 sizeof (ip6_address_t));
510 hdr.tcp.src_port = tc->c_lcl_port;
511 hdr.tcp.dst_port = tc->c_rmt_port;
512 hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config);
514 choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1);
515 dpo_copy (result, choice);
519 tcp_lookup_rmt_in_fib (tcp_connection_t * tc)
524 clib_memcpy (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr));
525 prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
526 prefix.fp_len = tc->c_is_ip4 ? 32 : 128;
527 fib_index = fib_table_find (prefix.fp_proto, tc->c_vrf);
528 return fib_table_lookup (fib_index, &prefix);
532 tcp_connection_stack_on_fib_entry (tcp_connection_t * tc)
534 dpo_id_t choice = DPO_INVALID;
535 u32 output_node_index;
538 fe = fib_entry_get (tc->c_rmt_fei);
539 if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE)
542 tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice);
545 tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index;
546 dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice);
550 /** Stack tcp connection on peer's fib entry.
552 * This ultimately populates the dpo the connection will use to send packets.
555 tcp_connection_fib_attach (tcp_connection_t * tc)
557 tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc);
559 ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID);
561 tcp_connection_stack_on_fib_entry (tc);
566 * Initialize connection send variables.
569 tcp_init_snd_vars (tcp_connection_t * tc)
573 /* Set random initial sequence */
574 time_now = tcp_time_now ();
575 tc->iss = random_u32 (&time_now);
576 tc->snd_una = tc->iss;
577 tc->snd_nxt = tc->iss + 1;
578 tc->snd_una_max = tc->snd_nxt;
581 /** Initialize tcp connection variables
583 * Should be called after having received a msg from the peer, i.e., a SYN or
584 * a SYNACK, such that connection options have already been exchanged. */
586 tcp_connection_init_vars (tcp_connection_t * tc)
588 tcp_connection_timers_init (tc);
590 scoreboard_init (&tc->sack_sb);
592 if (tc->state == TCP_STATE_SYN_RCVD)
593 tcp_init_snd_vars (tc);
595 // tcp_connection_fib_attach (tc);
599 tcp_connection_open (transport_endpoint_t * rmt)
601 tcp_main_t *tm = vnet_get_tcp_main ();
602 tcp_connection_t *tc;
604 fib_node_index_t fei;
605 u32 sw_if_index, fib_index;
606 ip46_address_t lcl_addr;
610 * Find the local address and allocate port
612 memset (&lcl_addr, 0, sizeof (lcl_addr));
614 /* Find a FIB path to the destination */
615 clib_memcpy (&prefix.fp_addr, &rmt->ip, sizeof (rmt->ip));
616 prefix.fp_proto = rmt->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
617 prefix.fp_len = rmt->is_ip4 ? 32 : 128;
619 fib_index = fib_table_find (prefix.fp_proto, rmt->vrf);
620 if (fib_index == (u32) ~ 0)
622 clib_warning ("no fib table");
626 fei = fib_table_lookup (fib_index, &prefix);
628 /* Couldn't find route to destination. Bail out. */
629 if (fei == FIB_NODE_INDEX_INVALID)
631 clib_warning ("no route to destination");
635 sw_if_index = fib_entry_get_resolving_interface (fei);
637 if (sw_if_index == (u32) ~ 0)
639 clib_warning ("no resolving interface for %U", format_ip46_address,
640 &rmt->ip, IP46_TYPE_IP4);
648 if (vec_len (tm->ip4_src_addresses))
650 index = tm->last_v4_address_rotor++;
651 if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses))
652 tm->last_v4_address_rotor = 0;
653 lcl_addr.ip4.as_u32 = tm->ip4_src_addresses[index].as_u32;
657 ip4 = ip_interface_get_first_ip (sw_if_index, 1);
658 lcl_addr.ip4.as_u32 = ip4->as_u32;
666 if (vec_len (tm->ip6_src_addresses))
668 index = tm->last_v6_address_rotor++;
669 if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses))
670 tm->last_v6_address_rotor = 0;
671 clib_memcpy (&lcl_addr.ip6, &tm->ip6_src_addresses[index],
676 ip6 = ip_interface_get_first_ip (sw_if_index, 0);
679 clib_warning ("no routable ip6 addresses on %U",
680 format_vnet_sw_if_index_name, vnet_get_main (),
685 clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6));
689 /* Allocate source port */
690 lcl_port = tcp_allocate_local_port (&lcl_addr);
693 clib_warning ("Failed to allocate src port");
698 * Create connection and send SYN
700 clib_spinlock_lock_if_init (&tm->half_open_lock);
701 tc = tcp_half_open_connection_new ();
702 clib_memcpy (&tc->c_rmt_ip, &rmt->ip, sizeof (ip46_address_t));
703 clib_memcpy (&tc->c_lcl_ip, &lcl_addr, sizeof (ip46_address_t));
704 tc->c_rmt_port = rmt->port;
705 tc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
706 tc->c_is_ip4 = rmt->is_ip4;
707 tc->c_transport_proto = TRANSPORT_PROTO_TCP;
708 tc->c_vrf = rmt->vrf;
709 /* The other connection vars will be initialized after SYN ACK */
710 tcp_connection_timers_init (tc);
712 TCP_EVT_DBG (TCP_EVT_OPEN, tc);
713 tc->state = TCP_STATE_SYN_SENT;
714 tcp_init_snd_vars (tc);
716 clib_spinlock_unlock_if_init (&tm->half_open_lock);
718 return tc->c_c_index;
722 tcp_session_open (transport_endpoint_t * tep)
724 return tcp_connection_open (tep);
727 const char *tcp_dbg_evt_str[] = {
728 #define _(sym, str) str,
733 const char *tcp_fsm_states[] = {
734 #define _(sym, str) str,
735 foreach_tcp_fsm_state
740 format_tcp_state (u8 * s, va_list * args)
742 u32 state = va_arg (*args, u32);
744 if (state < TCP_N_STATES)
745 s = format (s, "%s", tcp_fsm_states[state]);
747 s = format (s, "UNKNOWN (%d (0x%x))", state, state);
751 const char *tcp_conn_timers[] = {
752 #define _(sym, str) str,
758 format_tcp_timers (u8 * s, va_list * args)
760 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
763 for (i = 0; i < TCP_N_TIMERS; i++)
764 if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID)
768 for (i = 0; i < last; i++)
770 if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID)
771 s = format (s, "%s,", tcp_conn_timers[i]);
775 s = format (s, "%s]", tcp_conn_timers[i]);
783 format_tcp_congestion_status (u8 * s, va_list * args)
785 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
786 if (tcp_in_recovery (tc))
787 s = format (s, "recovery");
788 else if (tcp_in_fastrecovery (tc))
789 s = format (s, "fastrecovery");
791 s = format (s, "none");
796 format_tcp_vars (u8 * s, va_list * args)
798 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
799 s = format (s, " snd_una %u snd_nxt %u snd_una_max %u",
800 tc->snd_una - tc->iss, tc->snd_nxt - tc->iss,
801 tc->snd_una_max - tc->iss);
802 s = format (s, " rcv_nxt %u rcv_las %u\n",
803 tc->rcv_nxt - tc->irs, tc->rcv_las - tc->irs);
804 s = format (s, " snd_wnd %u rcv_wnd %u snd_wl1 %u snd_wl2 %u\n",
805 tc->snd_wnd, tc->rcv_wnd, tc->snd_wl1 - tc->irs,
806 tc->snd_wl2 - tc->iss);
807 s = format (s, " flight size %u send space %u rcv_wnd_av %d\n",
808 tcp_flight_size (tc), tcp_available_output_snd_space (tc),
809 tcp_rcv_wnd_available (tc));
810 s = format (s, " cong %U ", format_tcp_congestion_status, tc);
811 s = format (s, "cwnd %u ssthresh %u rtx_bytes %u bytes_acked %u\n",
812 tc->cwnd, tc->ssthresh, tc->snd_rxt_bytes, tc->bytes_acked);
813 s = format (s, " prev_ssthresh %u snd_congestion %u dupack %u",
814 tc->prev_ssthresh, tc->snd_congestion - tc->iss,
816 s = format (s, " limited_transmit %u\n", tc->limited_transmit - tc->iss);
817 s = format (s, " tsecr %u tsecr_last_ack %u\n", tc->rcv_opts.tsecr,
819 s = format (s, " rto %u rto_boff %u srtt %u rttvar %u rtt_ts %u ", tc->rto,
820 tc->rto_boff, tc->srtt, tc->rttvar, tc->rtt_ts);
821 s = format (s, "rtt_seq %u\n", tc->rtt_seq);
822 s = format (s, " tsval_recent %u tsval_recent_age %u\n", tc->tsval_recent,
823 tcp_time_now () - tc->tsval_recent_age);
824 s = format (s, " scoreboard: %U\n", format_tcp_scoreboard, &tc->sack_sb,
826 if (vec_len (tc->snd_sacks))
827 s = format (s, " sacks tx: %U\n", format_tcp_sacks, tc);
833 format_tcp_connection_id (u8 * s, va_list * args)
835 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
840 s = format (s, "[#%d][%s] %U:%d->%U:%d", tc->c_thread_index, "T",
841 format_ip4_address, &tc->c_lcl_ip4,
842 clib_net_to_host_u16 (tc->c_lcl_port), format_ip4_address,
843 &tc->c_rmt_ip4, clib_net_to_host_u16 (tc->c_rmt_port));
847 s = format (s, "[#%d][%s] %U:%d->%U:%d", tc->c_thread_index, "T",
848 format_ip6_address, &tc->c_lcl_ip6,
849 clib_net_to_host_u16 (tc->c_lcl_port), format_ip6_address,
850 &tc->c_rmt_ip6, clib_net_to_host_u16 (tc->c_rmt_port));
857 format_tcp_connection (u8 * s, va_list * args)
859 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
860 u32 verbose = va_arg (*args, u32);
864 s = format (s, "%-50U", format_tcp_connection_id, tc);
867 s = format (s, "%-15U", format_tcp_state, tc->state);
869 s = format (s, " %U\n%U", format_tcp_timers, tc, format_tcp_vars, tc);
876 format_tcp_session (u8 * s, va_list * args)
878 u32 tci = va_arg (*args, u32);
879 u32 thread_index = va_arg (*args, u32);
880 u32 verbose = va_arg (*args, u32);
881 tcp_connection_t *tc;
883 tc = tcp_connection_get (tci, thread_index);
885 s = format (s, "%U", format_tcp_connection, tc, verbose);
887 s = format (s, "empty\n");
892 format_tcp_listener_session (u8 * s, va_list * args)
894 u32 tci = va_arg (*args, u32);
895 tcp_connection_t *tc = tcp_listener_get (tci);
896 return format (s, "%U", format_tcp_connection_id, tc);
900 format_tcp_half_open_session (u8 * s, va_list * args)
902 u32 tci = va_arg (*args, u32);
903 tcp_connection_t *tc = tcp_half_open_connection_get (tci);
904 return format (s, "%U", format_tcp_connection_id, tc);
908 format_tcp_sacks (u8 * s, va_list * args)
910 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
911 sack_block_t *sacks = tc->snd_sacks;
915 len = vec_len (sacks);
916 for (i = 0; i < len - 1; i++)
919 s = format (s, " start %u end %u\n", block->start - tc->irs,
920 block->end - tc->irs);
924 block = &sacks[len - 1];
925 s = format (s, " start %u end %u", block->start - tc->irs,
926 block->end - tc->irs);
932 format_tcp_rcv_sacks (u8 * s, va_list * args)
934 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
935 sack_block_t *sacks = tc->rcv_opts.sacks;
939 len = vec_len (sacks);
940 for (i = 0; i < len - 1; i++)
943 s = format (s, " start %u end %u\n", block->start - tc->iss,
944 block->end - tc->iss);
948 block = &sacks[len - 1];
949 s = format (s, " start %u end %u", block->start - tc->iss,
950 block->end - tc->iss);
956 format_tcp_sack_hole (u8 * s, va_list * args)
958 sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *);
959 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
961 s = format (s, " [%u, %u]", hole->start - tc->iss, hole->end - tc->iss);
963 s = format (s, " [%u, %u]", hole->start, hole->end);
968 format_tcp_scoreboard (u8 * s, va_list * args)
970 sack_scoreboard_t *sb = va_arg (*args, sack_scoreboard_t *);
971 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
972 sack_scoreboard_hole_t *hole;
973 s = format (s, "sacked_bytes %u last_sacked_bytes %u lost_bytes %u\n",
974 sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes);
975 s = format (s, " last_bytes_delivered %u high_sacked %u snd_una_adv %u\n",
976 sb->last_bytes_delivered, sb->high_sacked, sb->snd_una_adv);
977 s = format (s, " cur_rxt_hole %u high_rxt %u rescue_rxt %u",
978 sb->cur_rxt_hole, sb->high_rxt, sb->rescue_rxt);
980 hole = scoreboard_first_hole (sb);
982 s = format (s, "\n head %u tail %u holes:\n", sb->head, sb->tail);
986 s = format (s, "%U", format_tcp_sack_hole, hole, tc);
987 hole = scoreboard_next_hole (sb, hole);
993 transport_connection_t *
994 tcp_session_get_transport (u32 conn_index, u32 thread_index)
996 tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index);
997 return &tc->connection;
1000 transport_connection_t *
1001 tcp_half_open_session_get_transport (u32 conn_index)
1003 tcp_connection_t *tc = tcp_half_open_connection_get (conn_index);
1004 return &tc->connection;
1008 * Compute maximum segment size for session layer.
1010 * Since the result needs to be the actual data length, it first computes
1011 * the tcp options to be used in the next burst and subtracts their
1012 * length from the connection's snd_mss.
1015 tcp_session_send_mss (transport_connection_t * trans_conn)
1017 tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
1019 /* Ensure snd_mss does accurately reflect the amount of data we can push
1020 * in a segment. This also makes sure that options are updated according to
1021 * the current state of the connection. */
1022 tcp_update_snd_mss (tc);
1028 tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space)
1030 if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss))
1032 return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0;
1035 /* If not snd_wnd constrained and we can't write at least a segment,
1036 * don't try at all */
1037 if (PREDICT_FALSE (snd_space < tc->snd_mss))
1038 return snd_space < tc->cwnd ? 0 : snd_space;
1040 /* round down to mss multiple */
1041 return snd_space - (snd_space % tc->snd_mss);
1045 * Compute tx window session is allowed to fill.
1047 * Takes into account available send space, snd_mss and the congestion
1048 * state of the connection. If possible, the value returned is a multiple
1051 * @param tc tcp connection
1052 * @return number of bytes session is allowed to write
1055 tcp_snd_space (tcp_connection_t * tc)
1057 int snd_space, snt_limited;
1059 if (PREDICT_TRUE (tcp_in_cong_recovery (tc) == 0))
1061 snd_space = tcp_available_output_snd_space (tc);
1063 /* If we haven't gotten dupacks or if we did and have gotten sacked
1064 * bytes then we can still send as per Limited Transmit (RFC3042) */
1065 if (PREDICT_FALSE (tc->rcv_dupacks != 0
1066 && (tcp_opts_sack_permitted (tc)
1067 && tc->sack_sb.last_sacked_bytes == 0)))
1069 if (tc->rcv_dupacks == 1 && tc->limited_transmit != tc->snd_nxt)
1070 tc->limited_transmit = tc->snd_nxt;
1071 ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt));
1073 snt_limited = tc->snd_nxt - tc->limited_transmit;
1074 snd_space = clib_max (2 * tc->snd_mss - snt_limited, 0);
1076 return tcp_round_snd_space (tc, snd_space);
1079 if (tcp_in_recovery (tc))
1081 tc->snd_nxt = tc->snd_una_max;
1082 snd_space = tcp_available_snd_wnd (tc) - tc->snd_rxt_bytes
1083 - (tc->snd_una_max - tc->snd_congestion);
1084 if (snd_space <= 0 || (tc->snd_una_max - tc->snd_una) >= tc->snd_wnd)
1086 return tcp_round_snd_space (tc, snd_space);
1089 /* RFC 5681: When previously unsent data is available and the new value of
1090 * cwnd and the receiver's advertised window allow, a TCP SHOULD send 1*SMSS
1091 * bytes of previously unsent data. */
1092 if (tcp_in_fastrecovery (tc) && !tcp_fastrecovery_sent_1_smss (tc))
1094 if (tcp_available_output_snd_space (tc) < tc->snd_mss)
1096 tcp_fastrecovery_1_smss_on (tc);
1104 tcp_session_send_space (transport_connection_t * trans_conn)
1106 tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
1107 return clib_min (tcp_snd_space (tc),
1108 tc->snd_wnd - (tc->snd_nxt - tc->snd_una));
1112 tcp_rcv_wnd_available (tcp_connection_t * tc)
1114 return (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las);
1118 tcp_session_tx_fifo_offset (transport_connection_t * trans_conn)
1120 tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
1122 ASSERT (seq_geq (tc->snd_nxt, tc->snd_una));
1124 /* This still works if fast retransmit is on */
1125 return (tc->snd_nxt - tc->snd_una);
1129 const static transport_proto_vft_t tcp_proto = {
1130 .bind = tcp_session_bind,
1131 .unbind = tcp_session_unbind,
1132 .push_header = tcp_push_header,
1133 .get_connection = tcp_session_get_transport,
1134 .get_listener = tcp_session_get_listener,
1135 .get_half_open = tcp_half_open_session_get_transport,
1136 .open = tcp_session_open,
1137 .close = tcp_session_close,
1138 .cleanup = tcp_session_cleanup,
1139 .send_mss = tcp_session_send_mss,
1140 .send_space = tcp_session_send_space,
1141 .tx_fifo_offset = tcp_session_tx_fifo_offset,
1142 .format_connection = format_tcp_session,
1143 .format_listener = format_tcp_listener_session,
1144 .format_half_open = format_tcp_half_open_session,
1149 tcp_timer_keep_handler (u32 conn_index)
1151 u32 thread_index = vlib_get_thread_index ();
1152 tcp_connection_t *tc;
1154 tc = tcp_connection_get (conn_index, thread_index);
1155 tc->timers[TCP_TIMER_KEEP] = TCP_TIMER_HANDLE_INVALID;
1157 tcp_connection_close (tc);
1161 tcp_timer_establish_handler (u32 conn_index)
1163 tcp_connection_t *tc;
1165 tc = tcp_half_open_connection_get (conn_index);
1168 ASSERT (tc->state == TCP_STATE_SYN_SENT);
1169 stream_session_connect_notify (&tc->connection, 1 /* fail */ );
1170 TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2);
1174 tc = tcp_connection_get (conn_index, vlib_get_thread_index ());
1175 /* note: the connection may have already disappeared */
1176 if (PREDICT_FALSE (tc == 0))
1178 TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2);
1179 ASSERT (tc->state == TCP_STATE_SYN_RCVD);
1180 /* Start cleanup. App wasn't notified yet so use delete notify as
1181 * opposed to delete to cleanup session layer state. */
1182 stream_session_delete_notify (&tc->connection);
1184 tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID;
1185 tcp_connection_cleanup (tc);
1189 tcp_timer_waitclose_handler (u32 conn_index)
1191 u32 thread_index = vlib_get_thread_index ();
1192 tcp_connection_t *tc;
1194 tc = tcp_connection_get (conn_index, thread_index);
1197 tc->timers[TCP_TIMER_WAITCLOSE] = TCP_TIMER_HANDLE_INVALID;
1199 /* Session didn't come back with a close(). Send FIN either way
1200 * and switch to LAST_ACK. */
1201 if (tc->state == TCP_STATE_CLOSE_WAIT)
1203 if (tc->flags & TCP_CONN_FINSNT)
1205 clib_warning ("FIN was sent and still in CLOSE WAIT. Weird!");
1209 tc->state = TCP_STATE_LAST_ACK;
1211 /* Make sure we don't wait in LAST ACK forever */
1212 tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME);
1214 /* Don't delete the connection yet */
1218 tcp_connection_del (tc);
1222 static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] =
1224 tcp_timer_retransmit_handler,
1225 tcp_timer_delack_handler,
1226 tcp_timer_persist_handler,
1227 tcp_timer_keep_handler,
1228 tcp_timer_waitclose_handler,
1229 tcp_timer_retransmit_syn_handler,
1230 tcp_timer_establish_handler
1235 tcp_expired_timers_dispatch (u32 * expired_timers)
1238 u32 connection_index, timer_id;
1240 for (i = 0; i < vec_len (expired_timers); i++)
1242 /* Get session index and timer id */
1243 connection_index = expired_timers[i] & 0x0FFFFFFF;
1244 timer_id = expired_timers[i] >> 28;
1246 TCP_EVT_DBG (TCP_EVT_TIMER_POP, connection_index, timer_id);
1248 /* Handle expiration */
1249 (*timer_expiration_handlers[timer_id]) (connection_index);
1254 tcp_initialize_timer_wheels (tcp_main_t * tm)
1256 tw_timer_wheel_16t_2w_512sl_t *tw;
1258 foreach_vlib_main (({
1259 tw = &tm->timer_wheels[ii];
1260 tw_timer_wheel_init_16t_2w_512sl (tw, tcp_expired_timers_dispatch,
1261 100e-3 /* timer period 100ms */ , ~0);
1262 tw->last_run_time = vlib_time_now (this_vlib_main);
1268 tcp_main_enable (vlib_main_t * vm)
1270 tcp_main_t *tm = vnet_get_tcp_main ();
1271 ip_protocol_info_t *pi;
1272 ip_main_t *im = &ip_main;
1273 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1274 clib_error_t *error = 0;
1277 tcp_connection_t *tc __attribute__ ((unused));
1278 u32 preallocated_connections_per_thread;
1280 if ((error = vlib_call_init_function (vm, ip_main_init)))
1282 if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
1284 if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
1291 /* Register with IP */
1292 pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP);
1294 return clib_error_return (0, "TCP protocol info AWOL");
1295 pi->format_header = format_tcp_header;
1296 pi->unformat_pg_edit = unformat_pg_tcp_header;
1298 ip4_register_protocol (IP_PROTOCOL_TCP, tcp4_input_node.index);
1299 ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_input_node.index);
1301 /* Register as transport with session layer */
1302 session_register_transport (TRANSPORT_PROTO_TCP, 1, &tcp_proto);
1303 session_register_transport (TRANSPORT_PROTO_TCP, 0, &tcp_proto);
1306 * Initialize data structures
1309 num_threads = 1 /* main thread */ + vtm->n_threads;
1310 vec_validate (tm->connections, num_threads - 1);
1313 * Preallocate connections. Assume that thread 0 won't
1314 * use preallocated threads when running multi-core
1316 if (num_threads == 1)
1319 preallocated_connections_per_thread = tm->preallocated_connections;
1324 preallocated_connections_per_thread =
1325 tm->preallocated_connections / (num_threads - 1);
1327 for (; thread < num_threads; thread++)
1329 if (preallocated_connections_per_thread)
1330 pool_init_fixed (tm->connections[thread],
1331 preallocated_connections_per_thread);
1335 * Use a preallocated half-open connection pool?
1337 if (tm->preallocated_half_open_connections)
1338 pool_init_fixed (tm->half_open_connections,
1339 tm->preallocated_half_open_connections);
1341 /* Initialize per worker thread tx buffers (used for control messages) */
1342 vec_validate (tm->tx_buffers, num_threads - 1);
1344 /* Initialize timer wheels */
1345 vec_validate (tm->timer_wheels, num_threads - 1);
1346 tcp_initialize_timer_wheels (tm);
1348 /* Initialize clocks per tick for TCP timestamp. Used to compute
1349 * monotonically increasing timestamps. */
1350 tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
1351 / TCP_TSTAMP_RESOLUTION;
1353 if (tm->local_endpoints_table_buckets == 0)
1354 tm->local_endpoints_table_buckets = 250000;
1355 if (tm->local_endpoints_table_memory == 0)
1356 tm->local_endpoints_table_memory = 512 << 20;
1358 clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoint table",
1359 tm->local_endpoints_table_buckets,
1360 tm->local_endpoints_table_memory);
1362 /* Initialize [port-allocator] random number seed */
1363 tm->port_allocator_seed = (u32) clib_cpu_time_now ();
1365 if (num_threads > 1)
1367 clib_spinlock_init (&tm->half_open_lock);
1368 clib_spinlock_init (&tm->local_endpoints_lock);
1371 vec_validate (tm->tx_frames[0], num_threads - 1);
1372 vec_validate (tm->tx_frames[1], num_threads - 1);
1373 vec_validate (tm->ip_lookup_tx_frames[0], num_threads - 1);
1374 vec_validate (tm->ip_lookup_tx_frames[1], num_threads - 1);
1376 tm->bytes_per_buffer = vlib_buffer_free_list_buffer_size
1377 (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
1379 vec_validate (tm->time_now, num_threads - 1);
1384 vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en)
1388 if (tcp_main.is_enabled)
1391 return tcp_main_enable (vm);
1395 tcp_main.is_enabled = 0;
1402 tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
1404 tcp_main_t *tm = &tcp_main;
1406 tm->punt_unknown4 = is_add;
1408 tm->punt_unknown6 = is_add;
1412 tcp_init (vlib_main_t * vm)
1414 tcp_main_t *tm = vnet_get_tcp_main ();
1416 tcp_api_reference ();
1420 VLIB_INIT_FUNCTION (tcp_init);
1422 static clib_error_t *
1423 tcp_config_fn (vlib_main_t * vm, unformat_input_t * input)
1425 tcp_main_t *tm = vnet_get_tcp_main ();
1428 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1431 (input, "preallocated-connections %d",
1432 &tm->preallocated_connections))
1434 else if (unformat (input, "preallocated-half-open-connections %d",
1435 &tm->preallocated_half_open_connections))
1437 else if (unformat (input, "local-endpoints-table-memory %U",
1438 unformat_memory_size, &tmp))
1440 if (tmp >= 0x100000000)
1441 return clib_error_return (0, "memory size %llx (%lld) too large",
1443 tm->local_endpoints_table_memory = tmp;
1445 else if (unformat (input, "local-endpoints-table-buckets %d",
1446 &tm->local_endpoints_table_buckets))
1451 return clib_error_return (0, "unknown input `%U'",
1452 format_unformat_error, input);
1457 VLIB_CONFIG_FUNCTION (tcp_config_fn, "tcp");
1461 * \brief Configure an ipv4 source address range
1462 * @param vm vlib_main_t pointer
1463 * @param start first ipv4 address in the source address range
1464 * @param end last ipv4 address in the source address range
1465 * @param table_id VRF / table ID, 0 for the default FIB
1466 * @return 0 if all OK, else an error indication from api_errno.h
1470 tcp_configure_v4_source_address_range (vlib_main_t * vm,
1471 ip4_address_t * start,
1472 ip4_address_t * end, u32 table_id)
1474 tcp_main_t *tm = vnet_get_tcp_main ();
1475 vnet_main_t *vnm = vnet_get_main ();
1476 u32 start_host_byte_order, end_host_byte_order;
1477 fib_prefix_t prefix;
1478 vnet_sw_interface_t *si;
1479 fib_node_index_t fei;
1483 int vnet_proxy_arp_add_del (ip4_address_t * lo_addr,
1484 ip4_address_t * hi_addr, u32 fib_index,
1487 memset (&prefix, 0, sizeof (prefix));
1489 fib_index = fib_table_find (FIB_PROTOCOL_IP4, table_id);
1491 if (fib_index == ~0)
1492 return VNET_API_ERROR_NO_SUCH_FIB;
1494 start_host_byte_order = clib_net_to_host_u32 (start->as_u32);
1495 end_host_byte_order = clib_net_to_host_u32 (end->as_u32);
1497 /* sanity check for reversed args or some such */
1498 if ((end_host_byte_order - start_host_byte_order) > (10 << 10))
1499 return VNET_API_ERROR_INVALID_ARGUMENT;
1501 /* Lookup the last address, to identify the interface involved */
1503 prefix.fp_proto = FIB_PROTOCOL_IP4;
1504 memcpy (&prefix.fp_addr.ip4, end, sizeof (ip4_address_t));
1506 fei = fib_table_lookup (fib_index, &prefix);
1508 /* Couldn't find route to destination. Bail out. */
1509 if (fei == FIB_NODE_INDEX_INVALID)
1510 return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB;
1512 sw_if_index = fib_entry_get_resolving_interface (fei);
1514 /* Enable proxy arp on the interface */
1515 si = vnet_get_sw_interface (vnm, sw_if_index);
1516 si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP;
1518 /* Configure proxy arp across the range */
1519 rv = vnet_proxy_arp_add_del (start, end, fib_index, 0 /* is_del */ );
1526 dpo_id_t dpo = DPO_INVALID;
1528 vec_add1 (tm->ip4_src_addresses, start[0]);
1530 /* Add local adjacencies for the range */
1532 receive_dpo_add_or_lock (DPO_PROTO_IP4, ~0 /* sw_if_index */ ,
1535 prefix.fp_proto = FIB_PROTOCOL_IP4;
1536 prefix.fp_addr.ip4.as_u32 = start->as_u32;
1538 fib_table_entry_special_dpo_update (fib_index,
1541 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
1544 start_host_byte_order++;
1545 start->as_u32 = clib_host_to_net_u32 (start_host_byte_order);
1547 while (start_host_byte_order <= end_host_byte_order);
1553 * \brief Configure an ipv6 source address range
1554 * @param vm vlib_main_t pointer
1555 * @param start first ipv6 address in the source address range
1556 * @param end last ipv6 address in the source address range
1557 * @param table_id VRF / table ID, 0 for the default FIB
1558 * @return 0 if all OK, else an error indication from api_errno.h
1562 tcp_configure_v6_source_address_range (vlib_main_t * vm,
1563 ip6_address_t * start,
1564 ip6_address_t * end, u32 table_id)
1566 tcp_main_t *tm = vnet_get_tcp_main ();
1567 fib_prefix_t prefix;
1569 fib_node_index_t fei;
1572 memset (&prefix, 0, sizeof (prefix));
1574 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
1576 if (fib_index == ~0)
1577 return VNET_API_ERROR_NO_SUCH_FIB;
1583 dpo_id_t dpo = DPO_INVALID;
1585 /* Remember this address */
1586 vec_add1 (tm->ip6_src_addresses, start[0]);
1588 /* Lookup the prefix, to identify the interface involved */
1589 prefix.fp_len = 128;
1590 prefix.fp_proto = FIB_PROTOCOL_IP6;
1591 memcpy (&prefix.fp_addr.ip6, start, sizeof (ip6_address_t));
1593 fei = fib_table_lookup (fib_index, &prefix);
1595 /* Couldn't find route to destination. Bail out. */
1596 if (fei == FIB_NODE_INDEX_INVALID)
1597 return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB;
1599 sw_if_index = fib_entry_get_resolving_interface (fei);
1601 if (sw_if_index == (u32) ~ 0)
1602 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
1604 /* Add a proxy neighbor discovery entry for this address */
1605 ip6_neighbor_proxy_add_del (sw_if_index, start, 0 /* is_del */ );
1607 /* Add a receive adjacency for this address */
1608 receive_dpo_add_or_lock (DPO_PROTO_IP6, ~0 /* sw_if_index */ ,
1611 fib_table_entry_special_dpo_update (fib_index,
1614 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
1617 /* Done with the entire range? */
1618 if (!memcmp (start, end, sizeof (start[0])))
1621 /* Increment the address. DGMS. */
1623 for (i = 15; i >= 0; i--)
1626 if (tmp.as_u8[i] != 0)
1634 static clib_error_t *
1635 tcp_src_address (vlib_main_t * vm,
1636 unformat_input_t * input, vlib_cli_command_t * cmd_arg)
1638 ip4_address_t v4start, v4end;
1639 ip6_address_t v6start, v6end;
1645 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1647 if (unformat (input, "%U - %U", unformat_ip4_address, &v4start,
1648 unformat_ip4_address, &v4end))
1650 else if (unformat (input, "%U", unformat_ip4_address, &v4start))
1652 memcpy (&v4end, &v4start, sizeof (v4start));
1655 else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start,
1656 unformat_ip6_address, &v6end))
1658 else if (unformat (input, "%U", unformat_ip6_address, &v6start))
1660 memcpy (&v6end, &v6start, sizeof (v6start));
1663 else if (unformat (input, "fib-table %d", &table_id))
1669 if (!v4set && !v6set)
1670 return clib_error_return (0, "at least one v4 or v6 address required");
1674 rv = tcp_configure_v4_source_address_range (vm, &v4start, &v4end,
1681 case VNET_API_ERROR_NO_SUCH_FIB:
1682 return clib_error_return (0, "Invalid table-id %d", table_id);
1684 case VNET_API_ERROR_INVALID_ARGUMENT:
1685 return clib_error_return (0, "Invalid address range %U - %U",
1686 format_ip4_address, &v4start,
1687 format_ip4_address, &v4end);
1689 return clib_error_return (0, "error %d", rv);
1695 rv = tcp_configure_v6_source_address_range (vm, &v6start, &v6end,
1702 case VNET_API_ERROR_NO_SUCH_FIB:
1703 return clib_error_return (0, "Invalid table-id %d", table_id);
1706 return clib_error_return (0, "error %d", rv);
1714 VLIB_CLI_COMMAND (tcp_src_address_command, static) =
1716 .path = "tcp src-address",
1717 .short_help = "tcp src-address <ip-addr> [- <ip-addr>] add src address range",
1718 .function = tcp_src_address,
1723 tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb)
1725 #if TCP_SCOREBOARD_TRACE
1727 scoreboard_trace_elt_t *block;
1733 s = format (s, "scoreboard trace:");
1734 vec_foreach (block, sb->trace)
1736 s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end,
1737 block->ack, block->snd_una_max, block->group);
1739 s = format (s, "\n");
1747 static clib_error_t *
1748 tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input,
1749 vlib_cli_command_t * cmd_arg)
1751 transport_connection_t *tconn = 0;
1752 tcp_connection_t *tc;
1754 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1756 if (unformat (input, "%U", unformat_transport_connection, &tconn,
1757 TRANSPORT_PROTO_TCP))
1760 return clib_error_return (0, "unknown input `%U'",
1761 format_unformat_error, input);
1764 if (!TCP_SCOREBOARD_TRACE)
1766 vlib_cli_output (vm, "scoreboard tracing not enabled");
1770 tc = tcp_get_connection_from_transport (tconn);
1771 s = tcp_scoreboard_dump_trace (s, &tc->sack_sb);
1772 vlib_cli_output (vm, "%v", s);
1777 VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) =
1779 .path = "show tcp scoreboard trace",
1780 .short_help = "show tcp scoreboard trace <connection>",
1781 .function = tcp_show_scoreboard_trace_fn,
1786 tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose)
1789 scoreboard_trace_elt_t *trace;
1790 u32 next_ack, left, group, has_new_ack = 0;
1791 tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc;
1792 sack_block_t *block;
1797 memset (dummy_tc, 0, sizeof (*dummy_tc));
1798 tcp_connection_timers_init (dummy_tc);
1799 scoreboard_init (&dummy_tc->sack_sb);
1800 dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK;
1802 #if TCP_SCOREBOARD_TRACE
1803 trace = tc->sack_sb.trace;
1804 trace_len = vec_len (tc->sack_sb.trace);
1810 for (i = 0; i < trace_len; i++)
1812 if (trace[i].ack != 0)
1814 dummy_tc->snd_una = trace[i].ack - 1448;
1815 dummy_tc->snd_una_max = trace[i].ack;
1820 while (left < trace_len)
1822 group = trace[left].group;
1823 vec_reset_length (dummy_tc->rcv_opts.sacks);
1825 while (trace[left].group == group)
1827 if (trace[left].ack != 0)
1830 s = format (s, "Adding ack %u, snd_una_max %u, segs: ",
1831 trace[left].ack, trace[left].snd_una_max);
1832 dummy_tc->snd_una_max = trace[left].snd_una_max;
1833 next_ack = trace[left].ack;
1839 s = format (s, "[%u, %u], ", trace[left].start,
1841 vec_add2 (dummy_tc->rcv_opts.sacks, block, 1);
1842 block->start = trace[left].start;
1843 block->end = trace[left].end;
1849 tcp_rcv_sacks (dummy_tc, next_ack);
1851 dummy_tc->snd_una = next_ack + dummy_tc->sack_sb.snd_una_adv;
1854 s = format (s, "result: %U", format_tcp_scoreboard,
1855 &dummy_tc->sack_sb);
1858 s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb);
1863 static clib_error_t *
1864 tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input,
1865 vlib_cli_command_t * cmd_arg)
1867 transport_connection_t *tconn = 0;
1868 tcp_connection_t *tc = 0;
1870 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1872 if (unformat (input, "%U", unformat_transport_connection, &tconn,
1873 TRANSPORT_PROTO_TCP))
1876 return clib_error_return (0, "unknown input `%U'",
1877 format_unformat_error, input);
1880 if (!TCP_SCOREBOARD_TRACE)
1882 vlib_cli_output (vm, "scoreboard tracing not enabled");
1886 tc = tcp_get_connection_from_transport (tconn);
1889 vlib_cli_output (vm, "connection not found");
1892 str = tcp_scoreboard_replay (str, tc, 1);
1893 vlib_cli_output (vm, "%v", str);
1898 VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) =
1900 .path = "tcp replay scoreboard",
1901 .short_help = "tcp replay scoreboard <connection>",
1902 .function = tcp_scoreboard_trace_fn,
1906 static clib_error_t *
1907 show_tcp_punt_fn (vlib_main_t * vm, unformat_input_t * input,
1908 vlib_cli_command_t * cmd_arg)
1910 tcp_main_t *tm = vnet_get_tcp_main ();
1911 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1912 return clib_error_return (0, "unknown input `%U'", format_unformat_error,
1914 vlib_cli_output (vm, "IPv4 TCP punt: %s",
1915 tm->punt_unknown4 ? "enabled" : "disabled");
1916 vlib_cli_output (vm, "IPv6 TCP punt: %s",
1917 tm->punt_unknown6 ? "enabled" : "disabled");
1921 VLIB_CLI_COMMAND (show_tcp_punt_command, static) =
1923 .path = "show tcp punt",
1924 .short_help = "show tcp punt",
1925 .function = show_tcp_punt_fn,
1930 * fd.io coding-style-patch-verification: ON
1933 * eval: (c-set-style "gnu")