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.
17 udp state machine, etc.
20 #include <vnet/udp/udp.h>
21 #include <vnet/session/session.h>
22 #include <vnet/dpo/load_balance.h>
23 #include <vnet/fib/ip4_fib.h>
24 #include <vppinfra/sparse_vec.h>
29 udp_connection_register_port (vlib_main_t * vm, u16 lcl_port, u8 is_ip4)
31 udp_main_t *um = &udp_main;
32 udp_dst_port_info_t *pi;
35 pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
38 udp_add_dst_port (um, lcl_port, 0, is_ip4);
39 pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
40 pi->n_connections = 1;
44 pi->n_connections += 1;
45 /* Do not return. The fact that the pi is valid does not mean
49 pi->node_index = is_ip4 ? udp4_input_node.index : udp6_input_node.index;
50 pi->next_index = um->local_to_input_edge[is_ip4];
52 /* Setup udp protocol -> next index sparse vector mapping. */
54 n = sparse_vec_validate (um->next_by_dst_port4,
55 clib_host_to_net_u16 (lcl_port));
57 n = sparse_vec_validate (um->next_by_dst_port6,
58 clib_host_to_net_u16 (lcl_port));
60 n[0] = pi->next_index;
64 udp_connection_unregister_port (u16 lcl_port, u8 is_ip4)
66 udp_main_t *um = &udp_main;
67 udp_dst_port_info_t *pi;
69 pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
73 if (!pi->n_connections)
75 clib_warning ("no connections using port %u", lcl_port);
79 if (!clib_atomic_sub_fetch (&pi->n_connections, 1))
80 udp_unregister_dst_port (0, lcl_port, is_ip4);
84 udp_connection_share_port (u16 lcl_port, u8 is_ip4)
86 udp_main_t *um = &udp_main;
87 udp_dst_port_info_t *pi;
89 /* Done without a lock but the operation is atomic. Writers to pi hash
90 * table and vector should be guarded by a barrier sync */
91 pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
92 clib_atomic_fetch_add_rel (&pi->n_connections, 1);
96 udp_connection_alloc (u32 thread_index)
98 udp_main_t *um = &udp_main;
101 pool_get_aligned_will_expand (um->connections[thread_index], will_expand,
102 CLIB_CACHE_LINE_BYTES);
104 if (PREDICT_FALSE (will_expand))
106 clib_spinlock_lock_if_init (&udp_main.peekers_write_locks
108 pool_get_aligned (udp_main.connections[thread_index], uc,
109 CLIB_CACHE_LINE_BYTES);
110 clib_spinlock_unlock_if_init (&udp_main.peekers_write_locks
115 pool_get_aligned (um->connections[thread_index], uc,
116 CLIB_CACHE_LINE_BYTES);
118 clib_memset (uc, 0, sizeof (*uc));
119 uc->c_c_index = uc - um->connections[thread_index];
120 uc->c_thread_index = thread_index;
121 uc->c_proto = TRANSPORT_PROTO_UDP;
122 clib_spinlock_init (&uc->rx_lock);
127 udp_connection_free (udp_connection_t * uc)
129 u32 thread_index = uc->c_thread_index;
131 clib_memset (uc, 0xFA, sizeof (*uc));
132 pool_put (udp_main.connections[thread_index], uc);
136 udp_connection_delete (udp_connection_t * uc)
138 udp_connection_unregister_port (clib_net_to_host_u16 (uc->c_lcl_port),
140 session_transport_delete_notify (&uc->connection);
141 udp_connection_free (uc);
145 udp_session_bind (u32 session_index, transport_endpoint_t * lcl)
147 udp_main_t *um = vnet_get_udp_main ();
148 vlib_main_t *vm = vlib_get_main ();
149 transport_endpoint_cfg_t *lcl_ext;
150 udp_connection_t *listener;
151 udp_dst_port_info_t *pi;
154 pi = udp_get_dst_port_info (um, clib_net_to_host_u16 (lcl->port),
157 if (pi && !pi->n_connections)
159 clib_warning ("port already used");
163 pool_get (um->listener_pool, listener);
164 clib_memset (listener, 0, sizeof (udp_connection_t));
166 listener->c_lcl_port = lcl->port;
167 listener->c_c_index = listener - um->listener_pool;
169 /* If we are provided a sw_if_index, bind using one of its ips */
170 if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX)
172 if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index,
174 ip_set (&lcl->ip, iface_ip, lcl->is_ip4);
176 ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4);
177 listener->c_is_ip4 = lcl->is_ip4;
178 listener->c_proto = TRANSPORT_PROTO_UDP;
179 listener->c_s_index = session_index;
180 listener->c_fib_index = lcl->fib_index;
181 listener->flags |= UDP_CONN_F_OWNS_PORT;
182 lcl_ext = (transport_endpoint_cfg_t *) lcl;
183 if (lcl_ext->transport_flags & TRANSPORT_CFG_F_CONNECTED)
184 listener->flags |= UDP_CONN_F_CONNECTED;
186 listener->c_flags |= TRANSPORT_CONNECTION_F_CLESS;
187 clib_spinlock_init (&listener->rx_lock);
189 udp_connection_register_port (vm, clib_net_to_host_u16 (lcl->port),
191 return listener->c_c_index;
195 udp_session_unbind (u32 listener_index)
197 udp_main_t *um = &udp_main;
198 udp_connection_t *listener;
200 listener = udp_listener_get (listener_index);
201 udp_connection_unregister_port (clib_net_to_host_u16 (listener->c_lcl_port),
203 pool_put (um->listener_pool, listener);
207 transport_connection_t *
208 udp_session_get_listener (u32 listener_index)
210 udp_connection_t *us;
212 us = udp_listener_get (listener_index);
213 return &us->connection;
217 udp_push_header (transport_connection_t * tc, vlib_buffer_t * b)
219 udp_connection_t *uc;
220 vlib_main_t *vm = vlib_get_main ();
222 uc = udp_get_connection_from_transport (tc);
224 vlib_buffer_push_udp (b, uc->c_lcl_port, uc->c_rmt_port, 1);
226 vlib_buffer_push_ip4 (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
231 ih = vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
233 vnet_buffer (b)->l3_hdr_offset = (u8 *) ih - b->data;
235 vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
236 vnet_buffer (b)->sw_if_index[VLIB_TX] = uc->c_fib_index;
237 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
239 if (PREDICT_FALSE (uc->flags & UDP_CONN_F_CLOSING))
241 if (!transport_max_tx_dequeue (&uc->connection))
242 udp_connection_delete (uc);
248 transport_connection_t *
249 udp_session_get (u32 connection_index, u32 thread_index)
251 udp_connection_t *uc;
252 uc = udp_connection_get (connection_index, thread_index);
254 return &uc->connection;
259 udp_session_close (u32 connection_index, u32 thread_index)
261 udp_connection_t *uc;
263 uc = udp_connection_get (connection_index, thread_index);
267 if (!transport_max_tx_dequeue (&uc->connection))
268 udp_connection_delete (uc);
270 uc->flags |= UDP_CONN_F_CLOSING;
274 udp_session_cleanup (u32 connection_index, u32 thread_index)
276 udp_connection_t *uc;
277 uc = udp_connection_get (connection_index, thread_index);
279 udp_connection_free (uc);
283 format_udp_connection_id (u8 * s, va_list * args)
285 udp_connection_t *uc = va_arg (*args, udp_connection_t *);
289 s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
290 format_ip4_address, &uc->c_lcl_ip4,
291 clib_net_to_host_u16 (uc->c_lcl_port), format_ip4_address,
292 &uc->c_rmt_ip4, clib_net_to_host_u16 (uc->c_rmt_port));
294 s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
295 format_ip6_address, &uc->c_lcl_ip6,
296 clib_net_to_host_u16 (uc->c_lcl_port), format_ip6_address,
297 &uc->c_rmt_ip6, clib_net_to_host_u16 (uc->c_rmt_port));
302 format_udp_connection (u8 * s, va_list * args)
304 udp_connection_t *uc = va_arg (*args, udp_connection_t *);
305 u32 verbose = va_arg (*args, u32);
308 s = format (s, "%-50U", format_udp_connection_id, uc);
312 s = format (s, "%-15s", "-");
314 s = format (s, "\n");
320 format_udp_session (u8 * s, va_list * args)
322 u32 uci = va_arg (*args, u32);
323 u32 thread_index = va_arg (*args, u32);
324 u32 verbose = va_arg (*args, u32);
325 udp_connection_t *uc;
327 uc = udp_connection_get (uci, thread_index);
328 return format (s, "%U", format_udp_connection, uc, verbose);
332 format_udp_half_open_session (u8 * s, va_list * args)
334 u32 __clib_unused tci = va_arg (*args, u32);
335 u32 __clib_unused thread_index = va_arg (*args, u32);
336 clib_warning ("BUG");
341 format_udp_listener_session (u8 * s, va_list * args)
343 u32 tci = va_arg (*args, u32);
344 u32 __clib_unused thread_index = va_arg (*args, u32);
345 u32 verbose = va_arg (*args, u32);
346 udp_connection_t *uc = udp_listener_get (tci);
347 return format (s, "%U", format_udp_connection, uc, verbose);
351 udp_session_send_params (transport_connection_t * tconn,
352 transport_send_params_t * sp)
354 /* No constraint on TX window */
356 /* TODO figure out MTU of output interface */
364 udp_open_connection (transport_endpoint_cfg_t * rmt)
366 vlib_main_t *vm = vlib_get_main ();
367 u32 thread_index = vm->thread_index;
368 udp_connection_t *uc;
369 ip46_address_t lcl_addr;
372 if (transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
376 if (udp_is_valid_dst_port (lcl_port, rmt->is_ip4))
378 /* If specific source port was requested abort */
382 /* Try to find a port that's not used */
383 while (udp_is_valid_dst_port (lcl_port, rmt->is_ip4))
385 lcl_port = transport_alloc_local_port (TRANSPORT_PROTO_UDP,
389 clib_warning ("Failed to allocate src port");
395 udp_connection_register_port (vm, lcl_port, rmt->is_ip4);
397 /* We don't poll main thread if we have workers */
398 if (vlib_num_workers ())
401 uc = udp_connection_alloc (thread_index);
402 ip_copy (&uc->c_rmt_ip, &rmt->ip, rmt->is_ip4);
403 ip_copy (&uc->c_lcl_ip, &lcl_addr, rmt->is_ip4);
404 uc->c_rmt_port = rmt->port;
405 uc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
406 uc->c_is_ip4 = rmt->is_ip4;
407 uc->c_proto = TRANSPORT_PROTO_UDP;
408 uc->c_fib_index = rmt->fib_index;
409 uc->flags |= UDP_CONN_F_OWNS_PORT;
410 if (rmt->transport_flags & TRANSPORT_CFG_F_CONNECTED)
411 uc->flags |= UDP_CONN_F_CONNECTED;
413 uc->c_flags |= TRANSPORT_CONNECTION_F_CLESS;
415 return uc->c_c_index;
418 transport_connection_t *
419 udp_session_get_half_open (u32 conn_index)
421 udp_connection_t *uc;
424 /* We don't poll main thread if we have workers */
425 thread_index = vlib_num_workers ()? 1 : 0;
426 uc = udp_connection_get (conn_index, thread_index);
429 return &uc->connection;
433 static const transport_proto_vft_t udp_proto = {
434 .start_listen = udp_session_bind,
435 .connect = udp_open_connection,
436 .stop_listen = udp_session_unbind,
437 .push_header = udp_push_header,
438 .get_connection = udp_session_get,
439 .get_listener = udp_session_get_listener,
440 .get_half_open = udp_session_get_half_open,
441 .close = udp_session_close,
442 .cleanup = udp_session_cleanup,
443 .send_params = udp_session_send_params,
444 .format_connection = format_udp_session,
445 .format_half_open = format_udp_half_open_session,
446 .format_listener = format_udp_listener_session,
447 .transport_options = {
450 .tx_type = TRANSPORT_TX_DGRAM,
451 .service_type = TRANSPORT_SERVICE_CL,
458 udpc_connection_open (transport_endpoint_cfg_t * rmt)
460 udp_connection_t *uc;
461 /* Reproduce the logic of udp_open_connection to find the correct thread */
462 u32 thread_index = vlib_num_workers ()? 1 : vlib_get_main ()->thread_index;
464 uc_index = udp_open_connection (rmt);
465 if (uc_index == (u32) ~ 0)
467 uc = udp_connection_get (uc_index, thread_index);
468 uc->flags |= UDP_CONN_F_CONNECTED;
473 udpc_connection_listen (u32 session_index, transport_endpoint_t * lcl)
475 udp_connection_t *listener;
477 li_index = udp_session_bind (session_index, lcl);
478 if (li_index == (u32) ~ 0)
480 listener = udp_listener_get (li_index);
481 listener->flags |= UDP_CONN_F_CONNECTED;
482 /* Fake udp listener, i.e., make sure session layer adds a udp instead of
483 * udpc listener to the lookup table */
484 ((session_endpoint_cfg_t *) lcl)->transport_proto = TRANSPORT_PROTO_UDP;
489 static const transport_proto_vft_t udpc_proto = {
490 .start_listen = udpc_connection_listen,
491 .stop_listen = udp_session_unbind,
492 .connect = udpc_connection_open,
493 .push_header = udp_push_header,
494 .get_connection = udp_session_get,
495 .get_listener = udp_session_get_listener,
496 .get_half_open = udp_session_get_half_open,
497 .close = udp_session_close,
498 .cleanup = udp_session_cleanup,
499 .send_params = udp_session_send_params,
500 .format_connection = format_udp_session,
501 .format_half_open = format_udp_half_open_session,
502 .format_listener = format_udp_listener_session,
503 .transport_options = {
506 .tx_type = TRANSPORT_TX_DGRAM,
507 .service_type = TRANSPORT_SERVICE_VC,
508 .half_open_has_fifos = 1
513 static clib_error_t *
514 udp_init (vlib_main_t * vm)
516 udp_main_t *um = vnet_get_udp_main ();
517 ip_main_t *im = &ip_main;
518 vlib_thread_main_t *tm = vlib_get_thread_main ();
520 ip_protocol_info_t *pi;
527 /* IP registration */
528 pi = ip_get_protocol_info (im, IP_PROTOCOL_UDP);
530 return clib_error_return (0, "UDP protocol info AWOL");
531 pi->format_header = format_udp_header;
532 pi->unformat_pg_edit = unformat_pg_udp_header;
534 /* Register as transport with URI */
535 transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
536 FIB_PROTOCOL_IP4, ip4_lookup_node.index);
537 transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
538 FIB_PROTOCOL_IP6, ip6_lookup_node.index);
539 transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
540 FIB_PROTOCOL_IP4, ip4_lookup_node.index);
541 transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
542 FIB_PROTOCOL_IP6, ip6_lookup_node.index);
545 * Initialize data structures
548 num_threads = 1 /* main thread */ + tm->n_threads;
549 vec_validate (um->connections, num_threads - 1);
550 vec_validate (um->connection_peekers, num_threads - 1);
551 vec_validate (um->peekers_readers_locks, num_threads - 1);
552 vec_validate (um->peekers_write_locks, num_threads - 1);
555 for (i = 0; i < num_threads; i++)
557 clib_spinlock_init (&um->peekers_readers_locks[i]);
558 clib_spinlock_init (&um->peekers_write_locks[i]);
561 um->local_to_input_edge[UDP_IP4] =
562 vlib_node_add_next (vm, udp4_local_node.index, udp4_input_node.index);
563 um->local_to_input_edge[UDP_IP6] =
564 vlib_node_add_next (vm, udp6_local_node.index, udp6_input_node.index);
569 VLIB_INIT_FUNCTION (udp_init) =
571 .runs_after = VLIB_INITS("ip_main_init", "ip4_lookup_init",
577 static clib_error_t *
578 show_udp_punt_fn (vlib_main_t * vm, unformat_input_t * input,
579 vlib_cli_command_t * cmd_arg)
581 udp_main_t *um = vnet_get_udp_main ();
583 clib_error_t *error = NULL;
585 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
586 return clib_error_return (0, "unknown input `%U'", format_unformat_error,
589 udp_dst_port_info_t *port_info;
590 if (um->punt_unknown4)
592 vlib_cli_output (vm, "IPv4 UDP punt: enabled");
597 vec_foreach (port_info, um->dst_port_infos[UDP_IP4])
599 if (udp_is_valid_dst_port (port_info->dst_port, 1))
601 s = format (s, (!s) ? "%d" : ", %d", port_info->dst_port);
604 s = format (s, "%c", 0);
605 vlib_cli_output (vm, "IPV4 UDP ports punt : %s", s);
608 if (um->punt_unknown6)
610 vlib_cli_output (vm, "IPv6 UDP punt: enabled");
615 vec_foreach (port_info, um->dst_port_infos[UDP_IP6])
617 if (udp_is_valid_dst_port (port_info->dst_port, 01))
619 s = format (s, (!s) ? "%d" : ", %d", port_info->dst_port);
622 s = format (s, "%c", 0);
623 vlib_cli_output (vm, "IPV6 UDP ports punt : %s", s);
629 VLIB_CLI_COMMAND (show_tcp_punt_command, static) =
631 .path = "show udp punt",
632 .short_help = "show udp punt [ipv4|ipv6]",
633 .function = show_udp_punt_fn,
638 * fd.io coding-style-patch-verification: ON
641 * eval: (c-set-style "gnu")