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>
28 udp_connection_alloc (u32 thread_index)
30 udp_main_t *um = &udp_main;
33 pool_get_aligned_will_expand (um->connections[thread_index], will_expand,
34 CLIB_CACHE_LINE_BYTES);
36 if (PREDICT_FALSE (will_expand))
38 clib_spinlock_lock_if_init (&udp_main.peekers_write_locks
40 pool_get_aligned (udp_main.connections[thread_index], uc,
41 CLIB_CACHE_LINE_BYTES);
42 clib_spinlock_unlock_if_init (&udp_main.peekers_write_locks
47 pool_get_aligned (um->connections[thread_index], uc,
48 CLIB_CACHE_LINE_BYTES);
50 clib_memset (uc, 0, sizeof (*uc));
51 uc->c_c_index = uc - um->connections[thread_index];
52 uc->c_thread_index = thread_index;
53 uc->c_proto = TRANSPORT_PROTO_UDP;
54 clib_spinlock_init (&uc->rx_lock);
59 udp_connection_free (udp_connection_t * uc)
61 pool_put (udp_main.connections[uc->c_thread_index], uc);
63 clib_memset (uc, 0xFA, sizeof (*uc));
67 udp_connection_delete (udp_connection_t * uc)
69 if ((uc->flags & UDP_CONN_F_OWNS_PORT)
70 || !(uc->flags & UDP_CONN_F_CONNECTED))
71 udp_unregister_dst_port (vlib_get_main (),
72 clib_net_to_host_u16 (uc->c_lcl_port),
74 session_transport_delete_notify (&uc->connection);
75 udp_connection_free (uc);
79 udp_session_bind (u32 session_index, transport_endpoint_t * lcl)
81 udp_main_t *um = vnet_get_udp_main ();
82 vlib_main_t *vm = vlib_get_main ();
83 udp_connection_t *listener;
86 udp_dst_port_info_t *pi;
88 pi = udp_get_dst_port_info (um, lcl->port, lcl->is_ip4);
92 pool_get (um->listener_pool, listener);
93 clib_memset (listener, 0, sizeof (udp_connection_t));
95 listener->c_lcl_port = lcl->port;
96 listener->c_c_index = listener - um->listener_pool;
98 /* If we are provided a sw_if_index, bind using one of its ips */
99 if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX)
101 if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index,
103 ip_set (&lcl->ip, iface_ip, lcl->is_ip4);
105 ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4);
106 listener->c_is_ip4 = lcl->is_ip4;
107 listener->c_proto = TRANSPORT_PROTO_UDP;
108 listener->c_s_index = session_index;
109 listener->c_fib_index = lcl->fib_index;
110 listener->flags |= UDP_CONN_F_OWNS_PORT;
111 clib_spinlock_init (&listener->rx_lock);
113 node_index = lcl->is_ip4 ? udp4_input_node.index : udp6_input_node.index;
114 udp_register_dst_port (vm, clib_net_to_host_u16 (lcl->port), node_index,
116 return listener->c_c_index;
120 udp_session_unbind (u32 listener_index)
122 vlib_main_t *vm = vlib_get_main ();
124 udp_connection_t *listener;
125 listener = udp_listener_get (listener_index);
126 udp_unregister_dst_port (vm, clib_net_to_host_u16 (listener->c_lcl_port),
131 transport_connection_t *
132 udp_session_get_listener (u32 listener_index)
134 udp_connection_t *us;
136 us = udp_listener_get (listener_index);
137 return &us->connection;
141 udp_push_header (transport_connection_t * tc, vlib_buffer_t * b)
143 udp_connection_t *uc;
144 vlib_main_t *vm = vlib_get_main ();
146 uc = udp_get_connection_from_transport (tc);
148 vlib_buffer_push_udp (b, uc->c_lcl_port, uc->c_rmt_port, 1);
150 vlib_buffer_push_ip4 (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
155 ih = vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
157 vnet_buffer (b)->l3_hdr_offset = (u8 *) ih - b->data;
159 vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
160 vnet_buffer (b)->sw_if_index[VLIB_TX] = uc->c_fib_index;
161 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
163 if (PREDICT_FALSE (uc->flags & UDP_CONN_F_CLOSING))
165 if (!transport_max_tx_dequeue (&uc->connection))
166 udp_connection_delete (uc);
172 transport_connection_t *
173 udp_session_get (u32 connection_index, u32 thread_index)
175 udp_connection_t *uc;
176 uc = udp_connection_get (connection_index, thread_index);
178 return &uc->connection;
183 udp_session_close (u32 connection_index, u32 thread_index)
185 udp_connection_t *uc;
187 uc = udp_connection_get (connection_index, thread_index);
191 if (!transport_max_tx_dequeue (&uc->connection))
192 udp_connection_delete (uc);
194 uc->flags |= UDP_CONN_F_CLOSING;
198 udp_session_cleanup (u32 connection_index, u32 thread_index)
200 udp_connection_t *uc;
201 uc = udp_connection_get (connection_index, thread_index);
203 udp_connection_free (uc);
207 format_udp_connection_id (u8 * s, va_list * args)
209 udp_connection_t *uc = va_arg (*args, udp_connection_t *);
213 s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
214 format_ip4_address, &uc->c_lcl_ip4,
215 clib_net_to_host_u16 (uc->c_lcl_port), format_ip4_address,
216 &uc->c_rmt_ip4, clib_net_to_host_u16 (uc->c_rmt_port));
218 s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
219 format_ip6_address, &uc->c_lcl_ip6,
220 clib_net_to_host_u16 (uc->c_lcl_port), format_ip6_address,
221 &uc->c_rmt_ip6, clib_net_to_host_u16 (uc->c_rmt_port));
226 format_udp_connection (u8 * s, va_list * args)
228 udp_connection_t *uc = va_arg (*args, udp_connection_t *);
229 u32 verbose = va_arg (*args, u32);
232 s = format (s, "%-50U", format_udp_connection_id, uc);
236 s = format (s, "%-15s", "-");
238 s = format (s, "\n");
244 format_udp_session (u8 * s, va_list * args)
246 u32 uci = va_arg (*args, u32);
247 u32 thread_index = va_arg (*args, u32);
248 u32 verbose = va_arg (*args, u32);
249 udp_connection_t *uc;
251 uc = udp_connection_get (uci, thread_index);
252 return format (s, "%U", format_udp_connection, uc, verbose);
256 format_udp_half_open_session (u8 * s, va_list * args)
258 u32 __clib_unused tci = va_arg (*args, u32);
259 u32 __clib_unused thread_index = va_arg (*args, u32);
260 clib_warning ("BUG");
265 format_udp_listener_session (u8 * s, va_list * args)
267 u32 tci = va_arg (*args, u32);
268 u32 __clib_unused thread_index = va_arg (*args, u32);
269 u32 verbose = va_arg (*args, u32);
270 udp_connection_t *uc = udp_listener_get (tci);
271 return format (s, "%U", format_udp_connection, uc, verbose);
275 udp_send_mss (transport_connection_t * t)
277 /* TODO figure out MTU of output interface */
282 udp_send_space (transport_connection_t * t)
284 /* No constraint on TX window */
289 udp_open_connection (transport_endpoint_cfg_t * rmt)
291 udp_main_t *um = vnet_get_udp_main ();
292 vlib_main_t *vm = vlib_get_main ();
293 u32 thread_index = vm->thread_index;
294 udp_connection_t *uc;
295 ip46_address_t lcl_addr;
299 if (transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
303 while (udp_get_dst_port_info (um, lcl_port, rmt->is_ip4))
305 lcl_port = transport_alloc_local_port (TRANSPORT_PROTO_UDP, &lcl_addr);
308 clib_warning ("Failed to allocate src port");
313 node_index = rmt->is_ip4 ? udp4_input_node.index : udp6_input_node.index;
314 udp_register_dst_port (vm, lcl_port, node_index, 1 /* is_ipv4 */ );
316 /* We don't poll main thread if we have workers */
317 if (vlib_num_workers ())
320 uc = udp_connection_alloc (thread_index);
321 ip_copy (&uc->c_rmt_ip, &rmt->ip, rmt->is_ip4);
322 ip_copy (&uc->c_lcl_ip, &lcl_addr, rmt->is_ip4);
323 uc->c_rmt_port = rmt->port;
324 uc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
325 uc->c_is_ip4 = rmt->is_ip4;
326 uc->c_proto = TRANSPORT_PROTO_UDP;
327 uc->c_fib_index = rmt->fib_index;
328 uc->flags |= UDP_CONN_F_OWNS_PORT;
330 return uc->c_c_index;
333 transport_connection_t *
334 udp_session_get_half_open (u32 conn_index)
336 udp_connection_t *uc;
339 /* We don't poll main thread if we have workers */
340 thread_index = vlib_num_workers ()? 1 : 0;
341 uc = udp_connection_get (conn_index, thread_index);
344 return &uc->connection;
348 static const transport_proto_vft_t udp_proto = {
349 .start_listen = udp_session_bind,
350 .connect = udp_open_connection,
351 .stop_listen = udp_session_unbind,
352 .push_header = udp_push_header,
353 .get_connection = udp_session_get,
354 .get_listener = udp_session_get_listener,
355 .get_half_open = udp_session_get_half_open,
356 .close = udp_session_close,
357 .cleanup = udp_session_cleanup,
358 .send_mss = udp_send_mss,
359 .send_space = udp_send_space,
360 .format_connection = format_udp_session,
361 .format_half_open = format_udp_half_open_session,
362 .format_listener = format_udp_listener_session,
363 .transport_options = {
364 .tx_type = TRANSPORT_TX_DGRAM,
365 .service_type = TRANSPORT_SERVICE_CL,
372 udpc_connection_open (transport_endpoint_cfg_t * rmt)
374 udp_connection_t *uc;
375 /* Reproduce the logic of udp_open_connection to find the correct thread */
376 u32 thread_index = vlib_num_workers ()? 1 : vlib_get_main ()->thread_index;
378 uc_index = udp_open_connection (rmt);
379 if (uc_index == (u32) ~ 0)
381 uc = udp_connection_get (uc_index, thread_index);
382 uc->flags |= UDP_CONN_F_CONNECTED;
387 udpc_connection_listen (u32 session_index, transport_endpoint_t * lcl)
389 udp_connection_t *listener;
391 li_index = udp_session_bind (session_index, lcl);
392 if (li_index == (u32) ~ 0)
394 listener = udp_listener_get (li_index);
395 listener->flags |= UDP_CONN_F_CONNECTED;
400 static const transport_proto_vft_t udpc_proto = {
401 .start_listen = udpc_connection_listen,
402 .stop_listen = udp_session_unbind,
403 .connect = udpc_connection_open,
404 .push_header = udp_push_header,
405 .get_connection = udp_session_get,
406 .get_listener = udp_session_get_listener,
407 .get_half_open = udp_session_get_half_open,
408 .close = udp_session_close,
409 .cleanup = udp_session_cleanup,
410 .send_mss = udp_send_mss,
411 .send_space = udp_send_space,
412 .format_connection = format_udp_session,
413 .format_half_open = format_udp_half_open_session,
414 .format_listener = format_udp_listener_session,
415 .transport_options = {
416 .tx_type = TRANSPORT_TX_DGRAM,
417 .service_type = TRANSPORT_SERVICE_VC,
418 .half_open_has_fifos = 1
423 static clib_error_t *
424 udp_init (vlib_main_t * vm)
426 udp_main_t *um = vnet_get_udp_main ();
427 ip_main_t *im = &ip_main;
428 vlib_thread_main_t *tm = vlib_get_thread_main ();
430 ip_protocol_info_t *pi;
437 /* IP registration */
438 pi = ip_get_protocol_info (im, IP_PROTOCOL_UDP);
440 return clib_error_return (0, "UDP protocol info AWOL");
441 pi->format_header = format_udp_header;
442 pi->unformat_pg_edit = unformat_pg_udp_header;
444 /* Register as transport with URI */
445 transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
446 FIB_PROTOCOL_IP4, ip4_lookup_node.index);
447 transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
448 FIB_PROTOCOL_IP6, ip6_lookup_node.index);
449 transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
450 FIB_PROTOCOL_IP4, ip4_lookup_node.index);
451 transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
452 FIB_PROTOCOL_IP6, ip6_lookup_node.index);
455 * Initialize data structures
458 num_threads = 1 /* main thread */ + tm->n_threads;
459 vec_validate (um->connections, num_threads - 1);
460 vec_validate (um->connection_peekers, num_threads - 1);
461 vec_validate (um->peekers_readers_locks, num_threads - 1);
462 vec_validate (um->peekers_write_locks, num_threads - 1);
465 for (i = 0; i < num_threads; i++)
467 clib_spinlock_init (&um->peekers_readers_locks[i]);
468 clib_spinlock_init (&um->peekers_write_locks[i]);
474 VLIB_INIT_FUNCTION (udp_init) =
476 .runs_after = VLIB_INITS("ip_main_init", "ip4_lookup_init",
482 static clib_error_t *
483 show_udp_punt_fn (vlib_main_t * vm, unformat_input_t * input,
484 vlib_cli_command_t * cmd_arg)
486 udp_main_t *um = vnet_get_udp_main ();
488 clib_error_t *error = NULL;
490 if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
491 return clib_error_return (0, "unknown input `%U'", format_unformat_error,
494 udp_dst_port_info_t *port_info;
495 if (um->punt_unknown4)
497 vlib_cli_output (vm, "IPv4 UDP punt: enabled");
502 vec_foreach (port_info, um->dst_port_infos[UDP_IP4])
504 if (udp_is_valid_dst_port (port_info->dst_port, 1))
506 s = format (s, (!s) ? "%d" : ", %d", port_info->dst_port);
509 s = format (s, "%c", 0);
510 vlib_cli_output (vm, "IPV4 UDP ports punt : %s", s);
513 if (um->punt_unknown6)
515 vlib_cli_output (vm, "IPv6 UDP punt: enabled");
520 vec_foreach (port_info, um->dst_port_infos[UDP_IP6])
522 if (udp_is_valid_dst_port (port_info->dst_port, 01))
524 s = format (s, (!s) ? "%d" : ", %d", port_info->dst_port);
527 s = format (s, "%c", 0);
528 vlib_cli_output (vm, "IPV6 UDP ports punt : %s", s);
534 VLIB_CLI_COMMAND (show_tcp_punt_command, static) =
536 .path = "show udp punt",
537 .short_help = "show udp punt [ipv4|ipv6]",
538 .function = show_udp_punt_fn,
543 * fd.io coding-style-patch-verification: ON
546 * eval: (c-set-style "gnu")