blob: 493275006f701421d531fcf254e312cf1d7d8155 [file] [log] [blame]
Dave Barach68b0fb02017-02-28 15:15:56 -05001/*
Florin Corasc98ef752020-04-07 17:30:13 +00002 * Copyright (c) 2016-2020 Cisco and/or its affiliates.
Dave Barach68b0fb02017-02-28 15:15:56 -05003 * 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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15
Dave Barach68b0fb02017-02-28 15:15:56 -050016#include <vnet/udp/udp.h>
17#include <vnet/session/session.h>
18#include <vnet/dpo/load_balance.h>
Neale Rannse4031132020-10-26 13:00:06 +000019#include <vnet/ip/ip4_inlines.h>
20#include <vnet/ip/ip6_inlines.h>
Florin Corasa0396202020-04-01 00:11:16 +000021#include <vppinfra/sparse_vec.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050022
Filip Tehlar2c49ffe2019-03-06 07:16:08 -080023udp_main_t udp_main;
24
Florin Corasa0396202020-04-01 00:11:16 +000025static void
Florin Corasc8e41102022-03-18 10:27:29 -070026udp_connection_register_port (u16 lcl_port, u8 is_ip4)
Florin Corasa0396202020-04-01 00:11:16 +000027{
28 udp_main_t *um = &udp_main;
Florin Corasa0396202020-04-01 00:11:16 +000029 u16 *n;
30
Florin Corase1f20582022-11-11 11:37:36 -080031 /* Setup udp protocol -> next index sparse vector mapping. Do not setup
32 * udp_dst_port_info_t as that is used to distinguish between external
33 * and transport consumed ports */
Florin Corasa0396202020-04-01 00:11:16 +000034
Florin Corasa0396202020-04-01 00:11:16 +000035 if (is_ip4)
Florin Corase1f20582022-11-11 11:37:36 -080036 n = sparse_vec_validate (um->next_by_dst_port4, lcl_port);
Florin Corasa0396202020-04-01 00:11:16 +000037 else
Florin Corase1f20582022-11-11 11:37:36 -080038 n = sparse_vec_validate (um->next_by_dst_port6, lcl_port);
Florin Corasa0396202020-04-01 00:11:16 +000039
Florin Corase1f20582022-11-11 11:37:36 -080040 n[0] = um->local_to_input_edge[is_ip4];
Florin Coras9bc72ac2023-01-09 12:46:07 -080041
42 __atomic_add_fetch (&um->transport_ports_refcnt[is_ip4][lcl_port], 1,
43 __ATOMIC_RELAXED);
Florin Corasa0396202020-04-01 00:11:16 +000044}
45
46static void
47udp_connection_unregister_port (u16 lcl_port, u8 is_ip4)
48{
49 udp_main_t *um = &udp_main;
Florin Corase1f20582022-11-11 11:37:36 -080050 u16 *n;
Florin Corasa0396202020-04-01 00:11:16 +000051
Florin Coras9bc72ac2023-01-09 12:46:07 -080052 /* Needed because listeners are not tracked as local endpoints */
53 if (__atomic_sub_fetch (&um->transport_ports_refcnt[is_ip4][lcl_port], 1,
54 __ATOMIC_RELAXED))
55 return;
56
Florin Corase1f20582022-11-11 11:37:36 -080057 if (is_ip4)
58 n = sparse_vec_validate (um->next_by_dst_port4, lcl_port);
59 else
60 n = sparse_vec_validate (um->next_by_dst_port6, lcl_port);
Florin Corasa0396202020-04-01 00:11:16 +000061
Florin Corase1f20582022-11-11 11:37:36 -080062 n[0] = UDP_NO_NODE_SET;
Florin Corasa0396202020-04-01 00:11:16 +000063}
64
Florin Coras3cbc04b2017-10-02 00:18:51 -070065udp_connection_t *
66udp_connection_alloc (u32 thread_index)
67{
Florin Coras4c89b182022-10-24 18:59:06 -070068 udp_worker_t *wrk = udp_worker_get (thread_index);
Florin Coras3cbc04b2017-10-02 00:18:51 -070069 udp_connection_t *uc;
Florin Coras3cbc04b2017-10-02 00:18:51 -070070
Florin Coras4c89b182022-10-24 18:59:06 -070071 pool_get_aligned_safe (wrk->connections, uc, CLIB_CACHE_LINE_BYTES);
Florin Corasa2b358b2022-03-18 12:50:03 -070072
Dave Barachb7b92992018-10-17 10:38:51 -040073 clib_memset (uc, 0, sizeof (*uc));
Florin Coras4c89b182022-10-24 18:59:06 -070074 uc->c_c_index = uc - wrk->connections;
Florin Coras3cbc04b2017-10-02 00:18:51 -070075 uc->c_thread_index = thread_index;
76 uc->c_proto = TRANSPORT_PROTO_UDP;
77 return uc;
78}
79
80void
81udp_connection_free (udp_connection_t * uc)
82{
Florin Coras4c89b182022-10-24 18:59:06 -070083 udp_worker_t *wrk = udp_worker_get (uc->c_thread_index);
84
Florin Coras30fdf392020-12-02 21:14:56 -080085 clib_spinlock_free (&uc->rx_lock);
Florin Coras3cbc04b2017-10-02 00:18:51 -070086 if (CLIB_DEBUG)
Dave Barachb7b92992018-10-17 10:38:51 -040087 clib_memset (uc, 0xFA, sizeof (*uc));
Florin Coras4c89b182022-10-24 18:59:06 -070088 pool_put (wrk->connections, uc);
Florin Coras3cbc04b2017-10-02 00:18:51 -070089}
Dave Barach68b0fb02017-02-28 15:15:56 -050090
Florin Coras57a5a2d2020-04-01 23:16:11 +000091static void
92udp_connection_cleanup (udp_connection_t * uc)
93{
Florin Corase1f20582022-11-11 11:37:36 -080094 /* Unregister port from udp_local only if refcount went to zero */
95 if (!transport_release_local_endpoint (TRANSPORT_PROTO_UDP, &uc->c_lcl_ip,
96 uc->c_lcl_port))
97 udp_connection_unregister_port (uc->c_lcl_port, uc->c_is_ip4);
Florin Coras57a5a2d2020-04-01 23:16:11 +000098 udp_connection_free (uc);
99}
100
Florin Corasc7542392019-07-22 08:08:43 -0700101void
102udp_connection_delete (udp_connection_t * uc)
103{
Florin Corasc7542392019-07-22 08:08:43 -0700104 session_transport_delete_notify (&uc->connection);
Florin Coras57a5a2d2020-04-01 23:16:11 +0000105 udp_connection_cleanup (uc);
Florin Corasc7542392019-07-22 08:08:43 -0700106}
107
Florin Coras1c29dfb2022-10-24 18:46:20 -0700108static void
109udp_handle_cleanups (void *args)
110{
111 u32 thread_index = (u32) pointer_to_uword (args);
112 udp_connection_t *uc;
113 udp_worker_t *wrk;
114 u32 *uc_index;
115
116 wrk = udp_worker_get (thread_index);
117 vec_foreach (uc_index, wrk->pending_cleanups)
118 {
119 uc = udp_connection_get (*uc_index, thread_index);
120 udp_connection_delete (uc);
121 }
122 vec_reset_length (wrk->pending_cleanups);
123}
124
125static void
126udp_connection_program_cleanup (udp_connection_t *uc)
127{
128 uword thread_index = uc->c_thread_index;
129 udp_worker_t *wrk;
130
131 wrk = udp_worker_get (uc->c_thread_index);
132 vec_add1 (wrk->pending_cleanups, uc->c_c_index);
133
134 if (vec_len (wrk->pending_cleanups) == 1)
135 session_send_rpc_evt_to_thread_force (
136 thread_index, udp_handle_cleanups,
137 uword_to_pointer (thread_index, void *));
138}
139
Florin Coras57660d92020-04-04 22:45:34 +0000140static u8
141udp_connection_port_used_extern (u16 lcl_port, u8 is_ip4)
142{
143 udp_main_t *um = vnet_get_udp_main ();
144 udp_dst_port_info_t *pi;
145
146 pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
Florin Corase1f20582022-11-11 11:37:36 -0800147 return (pi && udp_is_valid_dst_port (lcl_port, is_ip4));
Florin Coras57660d92020-04-04 22:45:34 +0000148}
149
Florin Corasc98ef752020-04-07 17:30:13 +0000150static u16
151udp_default_mtu (udp_main_t * um, u8 is_ip4)
152{
153 u16 ip_hlen = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
154 return (um->default_mtu - sizeof (udp_header_t) - ip_hlen);
155}
156
157static u32
Florin Coras0bce71e2022-02-10 11:57:06 -0800158udp_session_bind (u32 session_index, transport_endpoint_cfg_t *lcl)
Dave Barach68b0fb02017-02-28 15:15:56 -0500159{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700160 udp_main_t *um = vnet_get_udp_main ();
Florin Coras87b7e3d2020-03-27 15:06:07 +0000161 transport_endpoint_cfg_t *lcl_ext;
Dave Barach68b0fb02017-02-28 15:15:56 -0500162 udp_connection_t *listener;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700163 void *iface_ip;
Dave Barach68b0fb02017-02-28 15:15:56 -0500164
Florin Corase1f20582022-11-11 11:37:36 -0800165 if (udp_connection_port_used_extern (clib_net_to_host_u16 (lcl->port),
166 lcl->is_ip4))
Florin Corasa0396202020-04-01 00:11:16 +0000167 {
168 clib_warning ("port already used");
Florin Coras57660d92020-04-04 22:45:34 +0000169 return SESSION_E_PORTINUSE;
Florin Corasa0396202020-04-01 00:11:16 +0000170 }
Florin Coras3cbc04b2017-10-02 00:18:51 -0700171
172 pool_get (um->listener_pool, listener);
Dave Barachb7b92992018-10-17 10:38:51 -0400173 clib_memset (listener, 0, sizeof (udp_connection_t));
Florin Coras3cbc04b2017-10-02 00:18:51 -0700174
Florin Coras0e495682017-09-19 22:27:18 -0700175 listener->c_lcl_port = lcl->port;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700176 listener->c_c_index = listener - um->listener_pool;
177
178 /* If we are provided a sw_if_index, bind using one of its ips */
179 if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX)
180 {
181 if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index,
182 lcl->is_ip4)))
183 ip_set (&lcl->ip, iface_ip, lcl->is_ip4);
184 }
185 ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4);
186 listener->c_is_ip4 = lcl->is_ip4;
187 listener->c_proto = TRANSPORT_PROTO_UDP;
188 listener->c_s_index = session_index;
189 listener->c_fib_index = lcl->fib_index;
Steven Luongbf12efc2022-07-25 09:29:23 -0700190 listener->mss =
191 lcl->mss ? lcl->mss : udp_default_mtu (um, listener->c_is_ip4);
Florin Coras9c4ec6f2020-04-01 02:50:13 +0000192 listener->flags |= UDP_CONN_F_OWNS_PORT | UDP_CONN_F_LISTEN;
Florin Coras87b7e3d2020-03-27 15:06:07 +0000193 lcl_ext = (transport_endpoint_cfg_t *) lcl;
194 if (lcl_ext->transport_flags & TRANSPORT_CFG_F_CONNECTED)
195 listener->flags |= UDP_CONN_F_CONNECTED;
196 else
197 listener->c_flags |= TRANSPORT_CONNECTION_F_CLESS;
Florin Coras7fb0fe12018-04-09 09:24:52 -0700198 clib_spinlock_init (&listener->rx_lock);
Florin Corasf8ee39f2022-10-18 18:37:56 -0700199 if (!um->csum_offload)
200 listener->cfg_flags |= UDP_CFG_F_NO_CSUM_OFFLOAD;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700201
Florin Corase1f20582022-11-11 11:37:36 -0800202 udp_connection_register_port (listener->c_lcl_port, lcl->is_ip4);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700203 return listener->c_c_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500204}
205
Florin Corasc98ef752020-04-07 17:30:13 +0000206static u32
Florin Coras3cbc04b2017-10-02 00:18:51 -0700207udp_session_unbind (u32 listener_index)
Dave Barach68b0fb02017-02-28 15:15:56 -0500208{
Florin Corasa0396202020-04-01 00:11:16 +0000209 udp_main_t *um = &udp_main;
Dave Barach68b0fb02017-02-28 15:15:56 -0500210 udp_connection_t *listener;
Florin Corasa0396202020-04-01 00:11:16 +0000211
Dave Barach68b0fb02017-02-28 15:15:56 -0500212 listener = udp_listener_get (listener_index);
Florin Corase1f20582022-11-11 11:37:36 -0800213 udp_connection_unregister_port (listener->c_lcl_port, listener->c_is_ip4);
Florin Coras30fdf392020-12-02 21:14:56 -0800214 clib_spinlock_free (&listener->rx_lock);
Florin Corasa0396202020-04-01 00:11:16 +0000215 pool_put (um->listener_pool, listener);
Dave Barach68b0fb02017-02-28 15:15:56 -0500216 return 0;
217}
218
Florin Corasc98ef752020-04-07 17:30:13 +0000219static transport_connection_t *
Dave Barach68b0fb02017-02-28 15:15:56 -0500220udp_session_get_listener (u32 listener_index)
221{
222 udp_connection_t *us;
223
224 us = udp_listener_get (listener_index);
225 return &us->connection;
226}
227
Florin Corasf66cc802021-04-08 19:10:07 -0700228always_inline u32
229udp_push_one_header (vlib_main_t *vm, udp_connection_t *uc, vlib_buffer_t *b)
Dave Barach68b0fb02017-02-28 15:15:56 -0500230{
Florin Corasf8ee39f2022-10-18 18:37:56 -0700231 vlib_buffer_push_udp (b, uc->c_lcl_port, uc->c_rmt_port,
232 udp_csum_offload (uc));
Florin Coras3cbc04b2017-10-02 00:18:51 -0700233 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
Florin Coras15952b22022-12-19 10:55:18 -0800234
235 /* Handle ip header now as session layer overwrite connection details for
236 * non-connected udp. */
237 if (uc->c_is_ip4)
238 vlib_buffer_push_ip4_custom (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
239 IP_PROTOCOL_UDP, udp_csum_offload (uc),
240 0 /* is_df */, uc->c_dscp);
241 else
242 vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
243 IP_PROTOCOL_UDP);
244
Florin Coras8c1be052022-10-17 11:52:34 -0700245 /* reuse tcp medatada for now */
246 vnet_buffer (b)->tcp.connection_index = uc->c_c_index;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700247
Florin Coras15952b22022-12-19 10:55:18 -0800248 /* Not connected udp session. Mark buffer for custom handling in
249 * udp_output */
250 if (PREDICT_FALSE (!(uc->flags & UDP_CONN_F_CONNECTED)))
251 vnet_buffer (b)->tcp.flags |= UDP_CONN_F_LISTEN;
252 else
253 vnet_buffer (b)->tcp.flags = 0;
254
Florin Corasf66cc802021-04-08 19:10:07 -0700255 return 0;
256}
257
258static u32
259udp_push_header (transport_connection_t *tc, vlib_buffer_t **bs, u32 n_bufs)
260{
261 vlib_main_t *vm = vlib_get_main ();
262 udp_connection_t *uc;
263
264 uc = udp_connection_from_transport (tc);
265
266 while (n_bufs >= 4)
267 {
268 vlib_prefetch_buffer_header (bs[2], STORE);
269 vlib_prefetch_buffer_header (bs[3], STORE);
270
271 udp_push_one_header (vm, uc, bs[0]);
272 udp_push_one_header (vm, uc, bs[1]);
273
274 n_bufs -= 2;
275 bs += 2;
276 }
277 while (n_bufs)
278 {
279 if (n_bufs > 1)
280 vlib_prefetch_buffer_header (bs[1], STORE);
281
282 udp_push_one_header (vm, uc, bs[0]);
283
284 n_bufs -= 1;
285 bs += 1;
286 }
287
Florin Corasc7542392019-07-22 08:08:43 -0700288 if (PREDICT_FALSE (uc->flags & UDP_CONN_F_CLOSING))
289 {
290 if (!transport_max_tx_dequeue (&uc->connection))
Florin Coras1c29dfb2022-10-24 18:46:20 -0700291 udp_connection_program_cleanup (uc);
Florin Corasc7542392019-07-22 08:08:43 -0700292 }
293
Florin Coras3cbc04b2017-10-02 00:18:51 -0700294 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500295}
296
Florin Corasc98ef752020-04-07 17:30:13 +0000297static transport_connection_t *
Florin Coras3cbc04b2017-10-02 00:18:51 -0700298udp_session_get (u32 connection_index, u32 thread_index)
Dave Barach68b0fb02017-02-28 15:15:56 -0500299{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700300 udp_connection_t *uc;
301 uc = udp_connection_get (connection_index, thread_index);
302 if (uc)
303 return &uc->connection;
304 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500305}
306
Florin Corasc98ef752020-04-07 17:30:13 +0000307static void
Florin Coras3cbc04b2017-10-02 00:18:51 -0700308udp_session_close (u32 connection_index, u32 thread_index)
Dave Barach68b0fb02017-02-28 15:15:56 -0500309{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700310 udp_connection_t *uc;
Florin Corasc7542392019-07-22 08:08:43 -0700311
Florin Coras3cbc04b2017-10-02 00:18:51 -0700312 uc = udp_connection_get (connection_index, thread_index);
Florin Coras02000442021-11-16 12:45:43 -0800313 if (!uc || (uc->flags & UDP_CONN_F_MIGRATED))
Florin Corasc7542392019-07-22 08:08:43 -0700314 return;
315
316 if (!transport_max_tx_dequeue (&uc->connection))
Florin Coras1c29dfb2022-10-24 18:46:20 -0700317 udp_connection_program_cleanup (uc);
Florin Corasc7542392019-07-22 08:08:43 -0700318 else
319 uc->flags |= UDP_CONN_F_CLOSING;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700320}
321
Florin Corasc98ef752020-04-07 17:30:13 +0000322static void
Florin Coras3cbc04b2017-10-02 00:18:51 -0700323udp_session_cleanup (u32 connection_index, u32 thread_index)
324{
325 udp_connection_t *uc;
326 uc = udp_connection_get (connection_index, thread_index);
Florin Corasd85666f2020-04-03 00:58:48 +0000327 if (!uc)
328 return;
329 if (uc->flags & UDP_CONN_F_MIGRATED)
330 udp_connection_free (uc);
331 else
Florin Coras57a5a2d2020-04-01 23:16:11 +0000332 udp_connection_cleanup (uc);
Dave Barach68b0fb02017-02-28 15:15:56 -0500333}
334
Florin Coras70f879d2020-03-13 17:54:42 +0000335static int
336udp_session_send_params (transport_connection_t * tconn,
337 transport_send_params_t * sp)
Dave Barach68b0fb02017-02-28 15:15:56 -0500338{
Florin Corasba78e232020-04-06 21:28:59 +0000339 udp_connection_t *uc;
340
Florin Corase759bb52020-04-08 01:55:39 +0000341 uc = udp_connection_from_transport (tconn);
Florin Corasba78e232020-04-06 21:28:59 +0000342
Dave Barach68b0fb02017-02-28 15:15:56 -0500343 /* No constraint on TX window */
Florin Coras70f879d2020-03-13 17:54:42 +0000344 sp->snd_space = ~0;
345 /* TODO figure out MTU of output interface */
Florin Corasba78e232020-04-06 21:28:59 +0000346 sp->snd_mss = uc->mss;
Florin Coras70f879d2020-03-13 17:54:42 +0000347 sp->tx_offset = 0;
348 sp->flags = 0;
349 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500350}
351
Florin Corasc98ef752020-04-07 17:30:13 +0000352static int
Florin Coras5665ced2018-10-25 18:03:45 -0700353udp_open_connection (transport_endpoint_cfg_t * rmt)
Dave Barach68b0fb02017-02-28 15:15:56 -0500354{
Florin Corasba78e232020-04-06 21:28:59 +0000355 udp_main_t *um = &udp_main;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700356 ip46_address_t lcl_addr;
Florin Coras57660d92020-04-04 22:45:34 +0000357 udp_connection_t *uc;
Florin Corasc8e41102022-03-18 10:27:29 -0700358 u32 thread_index;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700359 u16 lcl_port;
Florin Coras00e01d32019-10-21 16:07:46 -0700360 int rv;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700361
Florin Coras00e01d32019-10-21 16:07:46 -0700362 rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
363 &lcl_port);
364 if (rv)
Florin Coras3d6156f2023-01-30 11:18:36 -0800365 return rv;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700366
Florin Corasd921b892023-05-25 12:04:53 -0700367 if (udp_connection_port_used_extern (clib_net_to_host_u16 (lcl_port),
368 rmt->is_ip4))
Florin Coras3cbc04b2017-10-02 00:18:51 -0700369 {
Florin Corasa0396202020-04-01 00:11:16 +0000370 /* If specific source port was requested abort */
371 if (rmt->peer.port)
Florin Coras3d6156f2023-01-30 11:18:36 -0800372 {
373 transport_release_local_endpoint (TRANSPORT_PROTO_UDP, &lcl_addr,
374 lcl_port);
375 return SESSION_E_PORTINUSE;
376 }
Florin Corasa0396202020-04-01 00:11:16 +0000377
378 /* Try to find a port that's not used */
Florin Corasd921b892023-05-25 12:04:53 -0700379 while (udp_connection_port_used_extern (clib_net_to_host_u16 (lcl_port),
380 rmt->is_ip4))
Florin Coras3cbc04b2017-10-02 00:18:51 -0700381 {
Florin Coras3d6156f2023-01-30 11:18:36 -0800382 transport_release_local_endpoint (TRANSPORT_PROTO_UDP, &lcl_addr,
383 lcl_port);
384 lcl_port =
385 transport_alloc_local_port (TRANSPORT_PROTO_UDP, &lcl_addr, rmt);
Florin Corasa0396202020-04-01 00:11:16 +0000386 if (lcl_port < 1)
Florin Coras00e01d32019-10-21 16:07:46 -0700387 return SESSION_E_PORTINUSE;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700388 }
389 }
390
Florin Coras40903ac2018-06-10 14:41:23 -0700391 /* We don't poll main thread if we have workers */
Florin Corasfb50bc32021-05-18 00:28:59 -0700392 thread_index = transport_cl_thread ();
Florin Coras40903ac2018-06-10 14:41:23 -0700393
Florin Coras3cbc04b2017-10-02 00:18:51 -0700394 uc = udp_connection_alloc (thread_index);
395 ip_copy (&uc->c_rmt_ip, &rmt->ip, rmt->is_ip4);
396 ip_copy (&uc->c_lcl_ip, &lcl_addr, rmt->is_ip4);
397 uc->c_rmt_port = rmt->port;
398 uc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
399 uc->c_is_ip4 = rmt->is_ip4;
400 uc->c_proto = TRANSPORT_PROTO_UDP;
401 uc->c_fib_index = rmt->fib_index;
Filip Tehlar3ef8bf32021-10-21 14:07:31 +0000402 uc->c_dscp = rmt->dscp;
Florin Corasc98ef752020-04-07 17:30:13 +0000403 uc->mss = rmt->mss ? rmt->mss : udp_default_mtu (um, uc->c_is_ip4);
Steven Luongbf12efc2022-07-25 09:29:23 -0700404 if (rmt->peer.sw_if_index != ENDPOINT_INVALID_INDEX)
405 uc->sw_if_index = rmt->peer.sw_if_index;
Florin Corasc7542392019-07-22 08:08:43 -0700406 uc->flags |= UDP_CONN_F_OWNS_PORT;
Florin Coras87b7e3d2020-03-27 15:06:07 +0000407 if (rmt->transport_flags & TRANSPORT_CFG_F_CONNECTED)
Florin Coras0ac57822021-03-03 08:06:12 -0800408 {
409 uc->flags |= UDP_CONN_F_CONNECTED;
410 }
Florin Coras87b7e3d2020-03-27 15:06:07 +0000411 else
Florin Coras0ac57822021-03-03 08:06:12 -0800412 {
413 clib_spinlock_init (&uc->rx_lock);
414 uc->c_flags |= TRANSPORT_CONNECTION_F_CLESS;
415 }
Florin Corasf8ee39f2022-10-18 18:37:56 -0700416 if (!um->csum_offload)
417 uc->cfg_flags |= UDP_CFG_F_NO_CSUM_OFFLOAD;
Florin Coras8c1be052022-10-17 11:52:34 -0700418 uc->next_node_index = rmt->next_node_index;
419 uc->next_node_opaque = rmt->next_node_opaque;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700420
Florin Corase1f20582022-11-11 11:37:36 -0800421 udp_connection_register_port (uc->c_lcl_port, rmt->is_ip4);
422
Florin Coras3cbc04b2017-10-02 00:18:51 -0700423 return uc->c_c_index;
424}
425
Florin Corasc98ef752020-04-07 17:30:13 +0000426static transport_connection_t *
Florin Coras40903ac2018-06-10 14:41:23 -0700427udp_session_get_half_open (u32 conn_index)
Florin Coras3cbc04b2017-10-02 00:18:51 -0700428{
429 udp_connection_t *uc;
Florin Coras40903ac2018-06-10 14:41:23 -0700430 u32 thread_index;
431
432 /* We don't poll main thread if we have workers */
Florin Corasfb50bc32021-05-18 00:28:59 -0700433 thread_index = transport_cl_thread ();
Florin Coras40903ac2018-06-10 14:41:23 -0700434 uc = udp_connection_get (conn_index, thread_index);
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200435 if (!uc)
436 return 0;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700437 return &uc->connection;
Dave Barach68b0fb02017-02-28 15:15:56 -0500438}
439
Florin Corasc98ef752020-04-07 17:30:13 +0000440static u8 *
441format_udp_session (u8 * s, va_list * args)
442{
443 u32 uci = va_arg (*args, u32);
444 u32 thread_index = va_arg (*args, u32);
445 u32 verbose = va_arg (*args, u32);
446 udp_connection_t *uc;
447
448 uc = udp_connection_get (uci, thread_index);
449 return format (s, "%U", format_udp_connection, uc, verbose);
450}
451
452static u8 *
453format_udp_half_open_session (u8 * s, va_list * args)
454{
455 u32 __clib_unused tci = va_arg (*args, u32);
456 u32 __clib_unused thread_index = va_arg (*args, u32);
457 clib_warning ("BUG");
458 return 0;
459}
460
461static u8 *
462format_udp_listener_session (u8 * s, va_list * args)
463{
464 u32 tci = va_arg (*args, u32);
465 u32 __clib_unused thread_index = va_arg (*args, u32);
466 u32 verbose = va_arg (*args, u32);
467 udp_connection_t *uc = udp_listener_get (tci);
468 return format (s, "%U", format_udp_connection, uc, verbose);
469}
470
Florin Coras797562c2022-11-18 18:29:23 -0800471static void
472udp_realloc_ports_sv (u16 **ports_nh_svp)
473{
474 u16 port, port_no, *ports_nh_sv, *mc;
475 u32 *ports = 0, *nh = 0, msum, i;
476 sparse_vec_header_t *h;
477 uword sv_index, *mb;
478
479 ports_nh_sv = *ports_nh_svp;
480
481 for (port = 1; port < 65535; port++)
482 {
483 port_no = clib_host_to_net_u16 (port);
484
485 sv_index = sparse_vec_index (ports_nh_sv, port_no);
486 if (sv_index != SPARSE_VEC_INVALID_INDEX)
487 {
488 vec_add1 (ports, port_no);
489 vec_add1 (nh, ports_nh_sv[sv_index]);
490 }
491 }
492
493 sparse_vec_free (ports_nh_sv);
494
495 ports_nh_sv =
496 sparse_vec_new (/* elt bytes */ sizeof (ports_nh_sv[0]),
497 /* bits in index */ BITS (((udp_header_t *) 0)->dst_port));
498
499 vec_resize (ports_nh_sv, 65535);
500
501 for (port = 1; port < 65535; port++)
Florin Corase1f20582022-11-11 11:37:36 -0800502 ports_nh_sv[port] = UDP_NO_NODE_SET;
Florin Coras797562c2022-11-18 18:29:23 -0800503
504 for (i = 0; i < vec_len (ports); i++)
505 ports_nh_sv[ports[i]] = nh[i];
506
507 h = sparse_vec_header (ports_nh_sv);
508 vec_foreach (mb, h->is_member_bitmap)
509 *mb = (uword) ~0;
510
511 msum = 0;
512 vec_foreach (mc, h->member_counts)
513 {
514 *mc = msum;
515 msum += msum == 0 ? 63 : 64;
516 }
517
518 vec_free (ports);
519 vec_free (nh);
520
521 *ports_nh_svp = ports_nh_sv;
522}
523
524static clib_error_t *
525udp_enable_disable (vlib_main_t *vm, u8 is_en)
526{
527 udp_main_t *um = &udp_main;
528
529 /* Not ideal. The sparse vector used to map ports to next nodes assumes
530 * only a few ports are ever used. When udp transport is enabled this does
531 * not hold and, to make matters worse, ports are consumed in a random
532 * order.
533 *
534 * This can lead to a lot of slow updates to internal data structures
535 * which in turn can slow udp connection allocations until all ports are
536 * eventually consumed.
537 *
538 * Consequently, reallocate sparse vector, preallocate all ports and have
539 * them point to UDP_NO_NODE_SET. We could consider switching the sparse
540 * vector to a preallocated vector but that would increase memory
541 * consumption for vpp deployments that do not rely on host stack.
542 */
543
544 udp_realloc_ports_sv (&um->next_by_dst_port4);
545 udp_realloc_ports_sv (&um->next_by_dst_port6);
546
Florin Coras9bc72ac2023-01-09 12:46:07 -0800547 vec_validate (um->transport_ports_refcnt[0], 65535);
548 vec_validate (um->transport_ports_refcnt[1], 65535);
549
Florin Coras797562c2022-11-18 18:29:23 -0800550 return 0;
551}
552
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200553static const transport_proto_vft_t udp_proto = {
Florin Coras797562c2022-11-18 18:29:23 -0800554 .enable = udp_enable_disable,
Florin Coras1ee78302019-02-05 15:51:15 -0800555 .start_listen = udp_session_bind,
556 .connect = udp_open_connection,
557 .stop_listen = udp_session_unbind,
Dave Barach68b0fb02017-02-28 15:15:56 -0500558 .push_header = udp_push_header,
559 .get_connection = udp_session_get,
560 .get_listener = udp_session_get_listener,
Florin Coras40903ac2018-06-10 14:41:23 -0700561 .get_half_open = udp_session_get_half_open,
Dave Barach68b0fb02017-02-28 15:15:56 -0500562 .close = udp_session_close,
Florin Coras3cbc04b2017-10-02 00:18:51 -0700563 .cleanup = udp_session_cleanup,
Florin Coras70f879d2020-03-13 17:54:42 +0000564 .send_params = udp_session_send_params,
Florin Coras3cbc04b2017-10-02 00:18:51 -0700565 .format_connection = format_udp_session,
566 .format_half_open = format_udp_half_open_session,
Florin Coras371ca502018-02-21 12:07:41 -0800567 .format_listener = format_udp_listener_session,
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200568 .transport_options = {
Florin Coras07063b82020-03-13 04:44:51 +0000569 .name = "udp",
570 .short_name = "U",
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200571 .tx_type = TRANSPORT_TX_DGRAM,
572 .service_type = TRANSPORT_SERVICE_CL,
573 },
Florin Coras7fb0fe12018-04-09 09:24:52 -0700574};
Florin Coras7fb0fe12018-04-09 09:24:52 -0700575
Dave Barach68b0fb02017-02-28 15:15:56 -0500576static clib_error_t *
577udp_init (vlib_main_t * vm)
578{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700579 udp_main_t *um = vnet_get_udp_main ();
Dave Barach68b0fb02017-02-28 15:15:56 -0500580 ip_main_t *im = &ip_main;
581 vlib_thread_main_t *tm = vlib_get_thread_main ();
582 u32 num_threads;
Dave Barach68b0fb02017-02-28 15:15:56 -0500583 ip_protocol_info_t *pi;
584
Dave Barach68b0fb02017-02-28 15:15:56 -0500585 /*
586 * Registrations
587 */
588
589 /* IP registration */
590 pi = ip_get_protocol_info (im, IP_PROTOCOL_UDP);
591 if (pi == 0)
592 return clib_error_return (0, "UDP protocol info AWOL");
593 pi->format_header = format_udp_header;
594 pi->unformat_pg_edit = unformat_pg_udp_header;
595
Florin Coras8c1be052022-10-17 11:52:34 -0700596 /* Register as transport with session layer */
Florin Coras561af9b2017-12-09 10:19:43 -0800597 transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
Florin Coras8c1be052022-10-17 11:52:34 -0700598 FIB_PROTOCOL_IP4, udp4_output_node.index);
Florin Coras561af9b2017-12-09 10:19:43 -0800599 transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
Florin Coras8c1be052022-10-17 11:52:34 -0700600 FIB_PROTOCOL_IP6, udp6_output_node.index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500601
602 /*
603 * Initialize data structures
604 */
605
606 num_threads = 1 /* main thread */ + tm->n_threads;
Florin Coras1c29dfb2022-10-24 18:46:20 -0700607 vec_validate (um->wrk, num_threads - 1);
Florin Corasa0396202020-04-01 00:11:16 +0000608
609 um->local_to_input_edge[UDP_IP4] =
610 vlib_node_add_next (vm, udp4_local_node.index, udp4_input_node.index);
611 um->local_to_input_edge[UDP_IP6] =
612 vlib_node_add_next (vm, udp6_local_node.index, udp6_input_node.index);
Florin Corasba78e232020-04-06 21:28:59 +0000613
614 um->default_mtu = 1500;
Florin Corasf8ee39f2022-10-18 18:37:56 -0700615 um->csum_offload = 1;
Dave Barachf8d50682019-05-14 18:01:44 -0400616 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500617}
618
Dave Barachf8d50682019-05-14 18:01:44 -0400619/* *INDENT-OFF* */
620VLIB_INIT_FUNCTION (udp_init) =
621{
622 .runs_after = VLIB_INITS("ip_main_init", "ip4_lookup_init",
623 "ip6_lookup_init"),
624};
625/* *INDENT-ON* */
626
Dave Barach68b0fb02017-02-28 15:15:56 -0500627/*
628 * fd.io coding-style-patch-verification: ON
629 *
630 * Local Variables:
631 * eval: (c-set-style "gnu")
632 * End:
633 */