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Florin Coras3cbc04b2017-10-02 00:18:51 -07001/*
Florin Coras288eaab2019-02-03 15:26:14 -08002 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
Florin Coras3cbc04b2017-10-02 00:18:51 -07003 * 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
Florin Coras1ee78302019-02-05 15:51:15 -080016#include <vnet/session/transport.h>
Florin Coras3cbc04b2017-10-02 00:18:51 -070017#include <vnet/session/session.h>
18#include <vnet/fib/fib.h>
19
20/**
21 * Per-type vector of transport protocol virtual function tables
22 */
23transport_proto_vft_t *tp_vfts;
24
25/*
26 * Port allocator seed
27 */
28static u32 port_allocator_seed;
29
30/*
31 * Local endpoints table
32 */
33static transport_endpoint_table_t local_endpoints_table;
34
35/*
36 * Pool of local endpoints
37 */
38static transport_endpoint_t *local_endpoints;
39
40/*
41 * Local endpoints pool lock
42 */
43static clib_spinlock_t local_endpoints_lock;
44
Florin Coras1c710452017-10-17 00:03:13 -070045u8 *
46format_transport_proto (u8 * s, va_list * args)
47{
48 u32 transport_proto = va_arg (*args, u32);
Florin Coras07063b82020-03-13 04:44:51 +000049
50 if (tp_vfts[transport_proto].transport_options.name)
51 s = format (s, "%s", tp_vfts[transport_proto].transport_options.name);
52 else
53 s = format (s, "n/a");
54
Florin Coras1c710452017-10-17 00:03:13 -070055 return s;
56}
57
Florin Coras561af9b2017-12-09 10:19:43 -080058u8 *
59format_transport_proto_short (u8 * s, va_list * args)
60{
61 u32 transport_proto = va_arg (*args, u32);
Florin Coras07063b82020-03-13 04:44:51 +000062 char *short_name;
63
64 short_name = tp_vfts[transport_proto].transport_options.short_name;
65 if (short_name)
66 s = format (s, "%s", short_name);
67 else
68 s = format (s, "NA");
69
Florin Coras561af9b2017-12-09 10:19:43 -080070 return s;
71}
72
Florin Corasde9a8492018-10-24 22:18:58 -070073u8 *
74format_transport_connection (u8 * s, va_list * args)
75{
76 u32 transport_proto = va_arg (*args, u32);
77 u32 conn_index = va_arg (*args, u32);
78 u32 thread_index = va_arg (*args, u32);
79 u32 verbose = va_arg (*args, u32);
80 transport_proto_vft_t *tp_vft;
81 transport_connection_t *tc;
82 u32 indent;
83
84 tp_vft = transport_protocol_get_vft (transport_proto);
85 if (!tp_vft)
86 return s;
87
88 s = format (s, "%U", tp_vft->format_connection, conn_index, thread_index,
89 verbose);
90 tc = tp_vft->get_connection (conn_index, thread_index);
91 if (tc && transport_connection_is_tx_paced (tc) && verbose > 1)
92 {
93 indent = format_get_indent (s) + 1;
94 s = format (s, "%Upacer: %U\n", format_white_space, indent,
Florin Corasa8e71c82019-10-22 19:01:39 -070095 format_transport_pacer, &tc->pacer, tc->thread_index);
Florin Coras70f879d2020-03-13 17:54:42 +000096 s = format (s, "%Utransport: flags 0x%x\n", format_white_space, indent,
97 tc->flags);
Florin Corasde9a8492018-10-24 22:18:58 -070098 }
99 return s;
100}
101
102u8 *
103format_transport_listen_connection (u8 * s, va_list * args)
104{
105 u32 transport_proto = va_arg (*args, u32);
Florin Corasde9a8492018-10-24 22:18:58 -0700106 transport_proto_vft_t *tp_vft;
107
108 tp_vft = transport_protocol_get_vft (transport_proto);
109 if (!tp_vft)
110 return s;
111
Florin Coras3389dd22019-02-01 18:00:05 -0800112 s = (tp_vft->format_listener) (s, args);
Florin Corasde9a8492018-10-24 22:18:58 -0700113 return s;
114}
115
116u8 *
117format_transport_half_open_connection (u8 * s, va_list * args)
118{
119 u32 transport_proto = va_arg (*args, u32);
120 u32 listen_index = va_arg (*args, u32);
121 transport_proto_vft_t *tp_vft;
122
123 tp_vft = transport_protocol_get_vft (transport_proto);
124 if (!tp_vft)
125 return s;
126
127 s = format (s, "%U", tp_vft->format_half_open, listen_index);
128 return s;
129}
130
Florin Coras3bbbf0d2019-11-19 17:23:22 -0800131static u8
132unformat_transport_str_match (unformat_input_t * input, const char *str)
133{
134 int i;
135
136 if (strlen (str) > vec_len (input->buffer) - input->index)
137 return 0;
138
139 for (i = 0; i < strlen (str); i++)
140 {
141 if (input->buffer[i + input->index] != str[i])
142 return 0;
143 }
144 return 1;
145}
146
Florin Coras1c710452017-10-17 00:03:13 -0700147uword
148unformat_transport_proto (unformat_input_t * input, va_list * args)
149{
150 u32 *proto = va_arg (*args, u32 *);
Florin Coras07063b82020-03-13 04:44:51 +0000151 transport_proto_vft_t *tp_vft;
Florin Coras3bbbf0d2019-11-19 17:23:22 -0800152 u8 longest_match = 0, match;
Florin Coras07063b82020-03-13 04:44:51 +0000153 char *str, *str_match = 0;
154 transport_proto_t tp;
Florin Coras5bb23ec2019-08-31 09:45:13 -0700155
Florin Coras07063b82020-03-13 04:44:51 +0000156 for (tp = 0; tp < vec_len (tp_vfts); tp++)
157 {
158 tp_vft = &tp_vfts[tp];
159 str = tp_vft->transport_options.name;
160 if (!str)
161 continue;
162 if (unformat_transport_str_match (input, str))
163 {
164 match = strlen (str);
165 if (match > longest_match)
166 {
167 *proto = tp;
168 longest_match = match;
169 str_match = str;
170 }
171 }
Florin Coras5bb23ec2019-08-31 09:45:13 -0700172 }
Florin Coras07063b82020-03-13 04:44:51 +0000173 if (longest_match)
Florin Coras3bbbf0d2019-11-19 17:23:22 -0800174 {
175 unformat (input, str_match);
176 return 1;
177 }
178
179 return 0;
Florin Coras1c710452017-10-17 00:03:13 -0700180}
Florin Coras3cbc04b2017-10-02 00:18:51 -0700181
Florin Coras07063b82020-03-13 04:44:51 +0000182u8 *
183format_transport_protos (u8 * s, va_list * args)
184{
185 transport_proto_vft_t *tp_vft;
186
187 vec_foreach (tp_vft, tp_vfts)
188 s = format (s, "%s\n", tp_vft->transport_options.name);
189
190 return s;
191}
192
Florin Coras3cbc04b2017-10-02 00:18:51 -0700193u32
194transport_endpoint_lookup (transport_endpoint_table_t * ht, u8 proto,
195 ip46_address_t * ip, u16 port)
196{
197 clib_bihash_kv_24_8_t kv;
198 int rv;
199
200 kv.key[0] = ip->as_u64[0];
201 kv.key[1] = ip->as_u64[1];
202 kv.key[2] = (u64) port << 8 | (u64) proto;
203
204 rv = clib_bihash_search_inline_24_8 (ht, &kv);
205 if (rv == 0)
206 return kv.value;
207
208 return ENDPOINT_INVALID_INDEX;
209}
210
211void
212transport_endpoint_table_add (transport_endpoint_table_t * ht, u8 proto,
213 transport_endpoint_t * te, u32 value)
214{
215 clib_bihash_kv_24_8_t kv;
216
217 kv.key[0] = te->ip.as_u64[0];
218 kv.key[1] = te->ip.as_u64[1];
219 kv.key[2] = (u64) te->port << 8 | (u64) proto;
220 kv.value = value;
221
222 clib_bihash_add_del_24_8 (ht, &kv, 1);
223}
224
225void
226transport_endpoint_table_del (transport_endpoint_table_t * ht, u8 proto,
227 transport_endpoint_t * te)
228{
229 clib_bihash_kv_24_8_t kv;
230
231 kv.key[0] = te->ip.as_u64[0];
232 kv.key[1] = te->ip.as_u64[1];
233 kv.key[2] = (u64) te->port << 8 | (u64) proto;
234
235 clib_bihash_add_del_24_8 (ht, &kv, 0);
236}
237
Florin Coras3cbc04b2017-10-02 00:18:51 -0700238void
Florin Coras561af9b2017-12-09 10:19:43 -0800239transport_register_protocol (transport_proto_t transport_proto,
240 const transport_proto_vft_t * vft,
241 fib_protocol_t fib_proto, u32 output_node)
Florin Coras3cbc04b2017-10-02 00:18:51 -0700242{
Florin Coras561af9b2017-12-09 10:19:43 -0800243 u8 is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700244
Florin Coras561af9b2017-12-09 10:19:43 -0800245 vec_validate (tp_vfts, transport_proto);
246 tp_vfts[transport_proto] = *vft;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700247
Florin Coras561af9b2017-12-09 10:19:43 -0800248 session_register_transport (transport_proto, vft, is_ip4, output_node);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700249}
250
Florin Coras07063b82020-03-13 04:44:51 +0000251transport_proto_t
252transport_register_new_protocol (const transport_proto_vft_t * vft,
253 fib_protocol_t fib_proto, u32 output_node)
254{
255 transport_proto_t transport_proto;
256 u8 is_ip4;
257
258 transport_proto = session_add_transport_proto ();
259 is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
260
261 vec_validate (tp_vfts, transport_proto);
262 tp_vfts[transport_proto] = *vft;
263
264 session_register_transport (transport_proto, vft, is_ip4, output_node);
265
266 return transport_proto;
267}
268
Florin Coras3cbc04b2017-10-02 00:18:51 -0700269/**
270 * Get transport virtual function table
271 *
272 * @param type - session type (not protocol type)
273 */
274transport_proto_vft_t *
Florin Coras561af9b2017-12-09 10:19:43 -0800275transport_protocol_get_vft (transport_proto_t transport_proto)
Florin Coras3cbc04b2017-10-02 00:18:51 -0700276{
Florin Coras561af9b2017-12-09 10:19:43 -0800277 if (transport_proto >= vec_len (tp_vfts))
Florin Coras3cbc04b2017-10-02 00:18:51 -0700278 return 0;
Florin Coras561af9b2017-12-09 10:19:43 -0800279 return &tp_vfts[transport_proto];
Florin Coras3cbc04b2017-10-02 00:18:51 -0700280}
281
Nathan Skrzypczaka26349d2019-06-26 13:53:08 +0200282u8
283transport_half_open_has_fifos (transport_proto_t tp)
284{
285 return tp_vfts[tp].transport_options.half_open_has_fifos;
286}
287
Florin Coras7fb0fe12018-04-09 09:24:52 -0700288transport_service_type_t
289transport_protocol_service_type (transport_proto_t tp)
290{
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200291 return tp_vfts[tp].transport_options.service_type;
Florin Coras7fb0fe12018-04-09 09:24:52 -0700292}
293
Florin Corasf08f26d2018-05-10 13:20:47 -0700294transport_tx_fn_type_t
295transport_protocol_tx_fn_type (transport_proto_t tp)
296{
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200297 return tp_vfts[tp].transport_options.tx_type;
Florin Corasf08f26d2018-05-10 13:20:47 -0700298}
299
Florin Coras1ee78302019-02-05 15:51:15 -0800300void
301transport_cleanup (transport_proto_t tp, u32 conn_index, u8 thread_index)
Florin Coras4edc37e2019-02-04 23:01:34 -0800302{
Florin Coras1ee78302019-02-05 15:51:15 -0800303 tp_vfts[tp].cleanup (conn_index, thread_index);
Florin Coras4edc37e2019-02-04 23:01:34 -0800304}
305
Florin Coras1ee78302019-02-05 15:51:15 -0800306int
307transport_connect (transport_proto_t tp, transport_endpoint_cfg_t * tep)
Florin Coras4edc37e2019-02-04 23:01:34 -0800308{
Florin Coras1ee78302019-02-05 15:51:15 -0800309 return tp_vfts[tp].connect (tep);
310}
311
312void
313transport_close (transport_proto_t tp, u32 conn_index, u8 thread_index)
314{
315 tp_vfts[tp].close (conn_index, thread_index);
316}
317
Florin Corasdfb3b872019-08-16 17:48:44 -0700318void
319transport_reset (transport_proto_t tp, u32 conn_index, u8 thread_index)
320{
321 if (tp_vfts[tp].reset)
322 tp_vfts[tp].reset (conn_index, thread_index);
323 else
324 tp_vfts[tp].close (conn_index, thread_index);
325}
326
Florin Coras1ee78302019-02-05 15:51:15 -0800327u32
328transport_start_listen (transport_proto_t tp, u32 session_index,
329 transport_endpoint_t * tep)
330{
331 return tp_vfts[tp].start_listen (session_index, tep);
332}
333
334u32
335transport_stop_listen (transport_proto_t tp, u32 conn_index)
336{
337 return tp_vfts[tp].stop_listen (conn_index);
Florin Coras4edc37e2019-02-04 23:01:34 -0800338}
339
Florin Coras40903ac2018-06-10 14:41:23 -0700340u8
341transport_protocol_is_cl (transport_proto_t tp)
342{
Nathan Skrzypczake971bc92019-06-19 13:42:37 +0200343 return (tp_vfts[tp].transport_options.service_type == TRANSPORT_SERVICE_CL);
Florin Coras40903ac2018-06-10 14:41:23 -0700344}
345
Aloys Augustincdb71702019-04-08 17:54:39 +0200346always_inline void
347default_get_transport_endpoint (transport_connection_t * tc,
Florin Coras09d18c22019-04-24 11:10:02 -0700348 transport_endpoint_t * tep, u8 is_lcl)
Aloys Augustincdb71702019-04-08 17:54:39 +0200349{
350 if (is_lcl)
351 {
Florin Coras09d18c22019-04-24 11:10:02 -0700352 tep->port = tc->lcl_port;
353 tep->is_ip4 = tc->is_ip4;
354 clib_memcpy_fast (&tep->ip, &tc->lcl_ip, sizeof (tc->lcl_ip));
Aloys Augustincdb71702019-04-08 17:54:39 +0200355 }
356 else
357 {
Florin Coras09d18c22019-04-24 11:10:02 -0700358 tep->port = tc->rmt_port;
359 tep->is_ip4 = tc->is_ip4;
360 clib_memcpy_fast (&tep->ip, &tc->rmt_ip, sizeof (tc->rmt_ip));
Aloys Augustincdb71702019-04-08 17:54:39 +0200361 }
362}
363
364void
365transport_get_endpoint (transport_proto_t tp, u32 conn_index,
Florin Coras09d18c22019-04-24 11:10:02 -0700366 u32 thread_index, transport_endpoint_t * tep,
367 u8 is_lcl)
Aloys Augustincdb71702019-04-08 17:54:39 +0200368{
369 if (tp_vfts[tp].get_transport_endpoint)
Florin Coras09d18c22019-04-24 11:10:02 -0700370 tp_vfts[tp].get_transport_endpoint (conn_index, thread_index, tep,
371 is_lcl);
Aloys Augustincdb71702019-04-08 17:54:39 +0200372 else
373 {
374 transport_connection_t *tc;
375 tc = transport_get_connection (tp, conn_index, thread_index);
Florin Coras09d18c22019-04-24 11:10:02 -0700376 default_get_transport_endpoint (tc, tep, is_lcl);
Aloys Augustincdb71702019-04-08 17:54:39 +0200377 }
378}
379
380void
381transport_get_listener_endpoint (transport_proto_t tp, u32 conn_index,
Florin Coras09d18c22019-04-24 11:10:02 -0700382 transport_endpoint_t * tep, u8 is_lcl)
Aloys Augustincdb71702019-04-08 17:54:39 +0200383{
384 if (tp_vfts[tp].get_transport_listener_endpoint)
Florin Coras09d18c22019-04-24 11:10:02 -0700385 tp_vfts[tp].get_transport_listener_endpoint (conn_index, tep, is_lcl);
Aloys Augustincdb71702019-04-08 17:54:39 +0200386 else
387 {
388 transport_connection_t *tc;
389 tc = transport_get_listener (tp, conn_index);
Florin Coras09d18c22019-04-24 11:10:02 -0700390 default_get_transport_endpoint (tc, tep, is_lcl);
Aloys Augustincdb71702019-04-08 17:54:39 +0200391 }
392}
393
Florin Coras3cbc04b2017-10-02 00:18:51 -0700394#define PORT_MASK ((1 << 16)- 1)
395
396void
397transport_endpoint_del (u32 tepi)
398{
399 clib_spinlock_lock_if_init (&local_endpoints_lock);
400 pool_put_index (local_endpoints, tepi);
401 clib_spinlock_unlock_if_init (&local_endpoints_lock);
402}
403
404always_inline transport_endpoint_t *
405transport_endpoint_new (void)
406{
407 transport_endpoint_t *tep;
Florin Coras5665ced2018-10-25 18:03:45 -0700408 pool_get_zero (local_endpoints, tep);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700409 return tep;
410}
411
412void
413transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port)
414{
415 u32 tepi;
416 transport_endpoint_t *tep;
417
418 /* Cleanup local endpoint if this was an active connect */
419 tepi = transport_endpoint_lookup (&local_endpoints_table, proto, lcl_ip,
420 clib_net_to_host_u16 (port));
421 if (tepi != ENDPOINT_INVALID_INDEX)
422 {
423 tep = pool_elt_at_index (local_endpoints, tepi);
424 transport_endpoint_table_del (&local_endpoints_table, proto, tep);
425 transport_endpoint_del (tepi);
426 }
427}
428
Florin Coras5665ced2018-10-25 18:03:45 -0700429static void
430transport_endpoint_mark_used (u8 proto, ip46_address_t * ip, u16 port)
431{
432 transport_endpoint_t *tep;
433 clib_spinlock_lock_if_init (&local_endpoints_lock);
434 tep = transport_endpoint_new ();
Dave Barach178cf492018-11-13 16:34:13 -0500435 clib_memcpy_fast (&tep->ip, ip, sizeof (*ip));
Florin Coras5665ced2018-10-25 18:03:45 -0700436 tep->port = port;
437 transport_endpoint_table_add (&local_endpoints_table, proto, tep,
438 tep - local_endpoints);
439 clib_spinlock_unlock_if_init (&local_endpoints_lock);
440}
441
Florin Coras3cbc04b2017-10-02 00:18:51 -0700442/**
443 * Allocate local port and add if successful add entry to local endpoint
444 * table to mark the pair as used.
445 */
446int
447transport_alloc_local_port (u8 proto, ip46_address_t * ip)
448{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700449 u16 min = 1024, max = 65535; /* XXX configurable ? */
450 int tries, limit;
Florin Coras5665ced2018-10-25 18:03:45 -0700451 u32 tei;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700452
453 limit = max - min;
454
455 /* Only support active opens from thread 0 */
456 ASSERT (vlib_get_thread_index () == 0);
457
458 /* Search for first free slot */
459 for (tries = 0; tries < limit; tries++)
460 {
461 u16 port = 0;
462
463 /* Find a port in the specified range */
464 while (1)
465 {
466 port = random_u32 (&port_allocator_seed) & PORT_MASK;
467 if (PREDICT_TRUE (port >= min && port < max))
468 break;
469 }
470
471 /* Look it up. If not found, we're done */
472 tei = transport_endpoint_lookup (&local_endpoints_table, proto, ip,
473 port);
474 if (tei == ENDPOINT_INVALID_INDEX)
475 {
Florin Coras5665ced2018-10-25 18:03:45 -0700476 transport_endpoint_mark_used (proto, ip, port);
477 return port;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700478 }
479 }
480 return -1;
481}
482
Florin Coras5665ced2018-10-25 18:03:45 -0700483static clib_error_t *
484transport_get_interface_ip (u32 sw_if_index, u8 is_ip4, ip46_address_t * addr)
Florin Coras3cbc04b2017-10-02 00:18:51 -0700485{
Florin Coras5665ced2018-10-25 18:03:45 -0700486 if (is_ip4)
Florin Coras3cbc04b2017-10-02 00:18:51 -0700487 {
488 ip4_address_t *ip4;
489 ip4 = ip_interface_get_first_ip (sw_if_index, 1);
Florin Corasfc804d92018-01-26 01:27:01 -0800490 if (!ip4)
Florin Coras5665ced2018-10-25 18:03:45 -0700491 return clib_error_return (0, "no routable ip4 address on %U",
492 format_vnet_sw_if_index_name,
493 vnet_get_main (), sw_if_index);
494 addr->ip4.as_u32 = ip4->as_u32;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700495 }
496 else
497 {
498 ip6_address_t *ip6;
499 ip6 = ip_interface_get_first_ip (sw_if_index, 0);
500 if (ip6 == 0)
Florin Coras5665ced2018-10-25 18:03:45 -0700501 return clib_error_return (0, "no routable ip6 addresses on %U",
502 format_vnet_sw_if_index_name,
503 vnet_get_main (), sw_if_index);
Dave Barach178cf492018-11-13 16:34:13 -0500504 clib_memcpy_fast (&addr->ip6, ip6, sizeof (*ip6));
Florin Coras5665ced2018-10-25 18:03:45 -0700505 }
506 return 0;
507}
508
509static clib_error_t *
510transport_find_local_ip_for_remote (u32 sw_if_index,
511 transport_endpoint_t * rmt,
512 ip46_address_t * lcl_addr)
513{
514 fib_node_index_t fei;
515 fib_prefix_t prefix;
516
517 if (sw_if_index == ENDPOINT_INVALID_INDEX)
518 {
519 /* Find a FIB path to the destination */
Dave Barach178cf492018-11-13 16:34:13 -0500520 clib_memcpy_fast (&prefix.fp_addr, &rmt->ip, sizeof (rmt->ip));
Florin Coras5665ced2018-10-25 18:03:45 -0700521 prefix.fp_proto = rmt->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
522 prefix.fp_len = rmt->is_ip4 ? 32 : 128;
523
524 ASSERT (rmt->fib_index != ENDPOINT_INVALID_INDEX);
525 fei = fib_table_lookup (rmt->fib_index, &prefix);
526
527 /* Couldn't find route to destination. Bail out. */
528 if (fei == FIB_NODE_INDEX_INVALID)
529 return clib_error_return (0, "no route to %U", format_ip46_address,
530 &rmt->ip, (rmt->is_ip4 == 0) + 1);
531
532 sw_if_index = fib_entry_get_resolving_interface (fei);
533 if (sw_if_index == ENDPOINT_INVALID_INDEX)
534 return clib_error_return (0, "no resolving interface for %U",
535 format_ip46_address, &rmt->ip,
536 (rmt->is_ip4 == 0) + 1);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700537 }
538
Florin Coras5665ced2018-10-25 18:03:45 -0700539 clib_memset (lcl_addr, 0, sizeof (*lcl_addr));
540 return transport_get_interface_ip (sw_if_index, rmt->is_ip4, lcl_addr);
541}
542
543int
544transport_alloc_local_endpoint (u8 proto, transport_endpoint_cfg_t * rmt_cfg,
545 ip46_address_t * lcl_addr, u16 * lcl_port)
546{
547 transport_endpoint_t *rmt = (transport_endpoint_t *) rmt_cfg;
548 clib_error_t *error;
549 int port;
550 u32 tei;
551
552 /*
553 * Find the local address
554 */
555 if (ip_is_zero (&rmt_cfg->peer.ip, rmt_cfg->peer.is_ip4))
Florin Coras3cbc04b2017-10-02 00:18:51 -0700556 {
Florin Coras5665ced2018-10-25 18:03:45 -0700557 error = transport_find_local_ip_for_remote (rmt_cfg->peer.sw_if_index,
558 rmt, lcl_addr);
559 if (error)
Florin Corasdc2e2512018-12-03 17:47:26 -0800560 {
561 clib_error_report (error);
562 return -1;
563 }
Florin Coras3cbc04b2017-10-02 00:18:51 -0700564 }
Florin Coras5665ced2018-10-25 18:03:45 -0700565 else
566 {
567 /* Assume session layer vetted this address */
Dave Barach178cf492018-11-13 16:34:13 -0500568 clib_memcpy_fast (lcl_addr, &rmt_cfg->peer.ip,
569 sizeof (rmt_cfg->peer.ip));
Florin Coras5665ced2018-10-25 18:03:45 -0700570 }
571
572 /*
573 * Allocate source port
574 */
575 if (rmt_cfg->peer.port == 0)
576 {
577 port = transport_alloc_local_port (proto, lcl_addr);
578 if (port < 1)
579 {
580 clib_warning ("Failed to allocate src port");
581 return -1;
582 }
583 *lcl_port = port;
584 }
585 else
586 {
587 port = clib_net_to_host_u16 (rmt_cfg->peer.port);
588 tei = transport_endpoint_lookup (&local_endpoints_table, proto,
589 lcl_addr, port);
590 if (tei != ENDPOINT_INVALID_INDEX)
591 return -1;
592
593 transport_endpoint_mark_used (proto, lcl_addr, port);
594 *lcl_port = port;
595 }
596
Florin Coras3cbc04b2017-10-02 00:18:51 -0700597 return 0;
598}
599
Florin Corasa8e71c82019-10-22 19:01:39 -0700600u8 *
601format_clib_us_time (u8 * s, va_list * args)
602{
603 clib_us_time_t t = va_arg (*args, clib_us_time_t);
604 if (t < 1e3)
605 s = format (s, "%u us", t);
606 else
607 s = format (s, "%.3f s", (f64) t * CLIB_US_TIME_PERIOD);
608 return s;
609}
Florin Corasd67f1122018-05-21 17:47:40 -0700610
611u8 *
612format_transport_pacer (u8 * s, va_list * args)
613{
614 spacer_t *pacer = va_arg (*args, spacer_t *);
Florin Corasa8e71c82019-10-22 19:01:39 -0700615 u32 thread_index = va_arg (*args, int);
616 clib_us_time_t now, diff;
Florin Corasd67f1122018-05-21 17:47:40 -0700617
Florin Corasa8e71c82019-10-22 19:01:39 -0700618 now = transport_us_time_now (thread_index);
619 diff = now - pacer->last_update;
Florin Coras11e9e352019-11-13 19:09:47 -0800620 s = format (s, "rate %lu bucket %lu t/p %.3f last_update %U idle %u",
Florin Corasbe237bf2019-09-27 08:16:40 -0700621 pacer->bytes_per_sec, pacer->bucket, pacer->tokens_per_period,
Florin Coras11e9e352019-11-13 19:09:47 -0800622 format_clib_us_time, diff, pacer->idle_timeout_us);
Florin Corasd67f1122018-05-21 17:47:40 -0700623 return s;
624}
625
626static inline u32
Florin Corasa8e71c82019-10-22 19:01:39 -0700627spacer_max_burst (spacer_t * pacer, clib_us_time_t time_now)
Florin Corasd67f1122018-05-21 17:47:40 -0700628{
Florin Corasa8e71c82019-10-22 19:01:39 -0700629 u64 n_periods = (time_now - pacer->last_update);
Florin Corase55a6d72018-10-31 23:09:22 -0700630 u64 inc;
Florin Corasd67f1122018-05-21 17:47:40 -0700631
Florin Coras11e9e352019-11-13 19:09:47 -0800632 if (PREDICT_FALSE (n_periods > pacer->idle_timeout_us))
Florin Corasc31dc312019-10-06 14:06:14 -0700633 {
Florin Corasa8e71c82019-10-22 19:01:39 -0700634 pacer->last_update = time_now;
Florin Corasc31dc312019-10-06 14:06:14 -0700635 pacer->bucket = TRANSPORT_PACER_MIN_BURST;
636 return TRANSPORT_PACER_MIN_BURST;
637 }
638
Florin Coras11e9e352019-11-13 19:09:47 -0800639 if ((inc = (f32) n_periods * pacer->tokens_per_period) > 10)
Florin Corase55a6d72018-10-31 23:09:22 -0700640 {
Florin Corasa8e71c82019-10-22 19:01:39 -0700641 pacer->last_update = time_now;
Florin Coras7c8f8282019-09-15 16:28:45 -0700642 pacer->bucket = clib_min (pacer->bucket + inc, pacer->bytes_per_sec);
Florin Corase55a6d72018-10-31 23:09:22 -0700643 }
644
Florin Coras6bc6fd02019-03-27 18:55:11 -0700645 return clib_min (pacer->bucket, TRANSPORT_PACER_MAX_BURST);
Florin Corasd67f1122018-05-21 17:47:40 -0700646}
647
648static inline void
649spacer_update_bucket (spacer_t * pacer, u32 bytes)
650{
651 ASSERT (pacer->bucket >= bytes);
652 pacer->bucket -= bytes;
653}
654
655static inline void
Florin Coras11e9e352019-11-13 19:09:47 -0800656spacer_set_pace_rate (spacer_t * pacer, u64 rate_bytes_per_sec,
657 clib_us_time_t rtt)
Florin Corasd67f1122018-05-21 17:47:40 -0700658{
659 ASSERT (rate_bytes_per_sec != 0);
Florin Coras7c8f8282019-09-15 16:28:45 -0700660 pacer->bytes_per_sec = rate_bytes_per_sec;
Florin Corasa8e71c82019-10-22 19:01:39 -0700661 pacer->tokens_per_period = rate_bytes_per_sec * CLIB_US_TIME_PERIOD;
Florin Coras11e9e352019-11-13 19:09:47 -0800662 pacer->idle_timeout_us = clib_max (rtt * TRANSPORT_PACER_IDLE_FACTOR,
663 TRANSPORT_PACER_MIN_IDLE);
Florin Corasd67f1122018-05-21 17:47:40 -0700664}
665
Florin Coras52814732019-06-12 15:38:19 -0700666static inline u64
667spacer_pace_rate (spacer_t * pacer)
668{
Florin Coras7c8f8282019-09-15 16:28:45 -0700669 return pacer->bytes_per_sec;
Florin Coras52814732019-06-12 15:38:19 -0700670}
671
Florin Coras36ebcff2019-09-12 18:36:44 -0700672static inline void
Florin Corasa8e71c82019-10-22 19:01:39 -0700673spacer_reset (spacer_t * pacer, clib_us_time_t time_now, u64 bucket)
Florin Coras36ebcff2019-09-12 18:36:44 -0700674{
Florin Corasa8e71c82019-10-22 19:01:39 -0700675 pacer->last_update = time_now;
676 pacer->bucket = bucket;
Florin Coras36ebcff2019-09-12 18:36:44 -0700677}
678
Florin Corasd67f1122018-05-21 17:47:40 -0700679void
Florin Corasc44a5582018-11-01 16:30:54 -0700680transport_connection_tx_pacer_reset (transport_connection_t * tc,
Florin Coras11e9e352019-11-13 19:09:47 -0800681 u64 rate_bytes_per_sec, u32 start_bucket,
682 clib_us_time_t rtt)
Florin Corasd67f1122018-05-21 17:47:40 -0700683{
Florin Coras11e9e352019-11-13 19:09:47 -0800684 spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec, rtt);
Florin Corasa8e71c82019-10-22 19:01:39 -0700685 spacer_reset (&tc->pacer, transport_us_time_now (tc->thread_index),
686 start_bucket);
687}
688
689void
Florin Coras11e9e352019-11-13 19:09:47 -0800690transport_connection_tx_pacer_reset_bucket (transport_connection_t * tc,
691 u32 bucket)
Florin Corasa8e71c82019-10-22 19:01:39 -0700692{
Florin Coras11e9e352019-11-13 19:09:47 -0800693 spacer_reset (&tc->pacer, transport_us_time_now (tc->thread_index), bucket);
Florin Corasc44a5582018-11-01 16:30:54 -0700694}
695
696void
697transport_connection_tx_pacer_init (transport_connection_t * tc,
Florin Corasa8e71c82019-10-22 19:01:39 -0700698 u64 rate_bytes_per_sec,
Florin Corasc44a5582018-11-01 16:30:54 -0700699 u32 initial_bucket)
700{
Florin Corasc44a5582018-11-01 16:30:54 -0700701 tc->flags |= TRANSPORT_CONNECTION_F_IS_TX_PACED;
702 transport_connection_tx_pacer_reset (tc, rate_bytes_per_sec,
Florin Coras11e9e352019-11-13 19:09:47 -0800703 initial_bucket, 1e6);
Florin Corasd67f1122018-05-21 17:47:40 -0700704}
705
706void
707transport_connection_tx_pacer_update (transport_connection_t * tc,
Florin Coras11e9e352019-11-13 19:09:47 -0800708 u64 bytes_per_sec, clib_us_time_t rtt)
Florin Corasd67f1122018-05-21 17:47:40 -0700709{
Florin Coras11e9e352019-11-13 19:09:47 -0800710 spacer_set_pace_rate (&tc->pacer, bytes_per_sec, rtt);
Florin Corasd67f1122018-05-21 17:47:40 -0700711}
712
713u32
Florin Corasa8e71c82019-10-22 19:01:39 -0700714transport_connection_tx_pacer_burst (transport_connection_t * tc)
Florin Corase55a6d72018-10-31 23:09:22 -0700715{
Florin Corasa8e71c82019-10-22 19:01:39 -0700716 return spacer_max_burst (&tc->pacer,
717 transport_us_time_now (tc->thread_index));
Florin Coras36ebcff2019-09-12 18:36:44 -0700718}
719
Florin Coras52814732019-06-12 15:38:19 -0700720u64
721transport_connection_tx_pacer_rate (transport_connection_t * tc)
722{
723 return spacer_pace_rate (&tc->pacer);
724}
725
Florin Corasd67f1122018-05-21 17:47:40 -0700726void
Florin Coras00482232019-08-02 12:52:00 -0700727transport_connection_update_tx_bytes (transport_connection_t * tc, u32 bytes)
Florin Corasd67f1122018-05-21 17:47:40 -0700728{
Florin Corasd67f1122018-05-21 17:47:40 -0700729 if (transport_connection_is_tx_paced (tc))
730 spacer_update_bucket (&tc->pacer, bytes);
731}
732
733void
Florin Corase55a6d72018-10-31 23:09:22 -0700734transport_connection_tx_pacer_update_bytes (transport_connection_t * tc,
735 u32 bytes)
736{
737 spacer_update_bucket (&tc->pacer, bytes);
738}
739
740void
Florin Coras70f879d2020-03-13 17:54:42 +0000741transport_connection_reschedule (transport_connection_t * tc)
742{
743 tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED;
Florin Coras6080e0d2020-03-13 20:39:43 +0000744 transport_connection_tx_pacer_reset_bucket (tc, TRANSPORT_PACER_MIN_BURST);
Florin Coras70f879d2020-03-13 17:54:42 +0000745 if (transport_max_tx_dequeue (tc))
746 sesssion_reschedule_tx (tc);
747 else
748 {
749 session_t *s = session_get (tc->s_index, tc->thread_index);
750 svm_fifo_unset_event (s->tx_fifo);
751 if (svm_fifo_max_dequeue_cons (s->tx_fifo))
752 if (svm_fifo_set_event (s->tx_fifo))
753 sesssion_reschedule_tx (tc);
754 }
755}
756
757void
Florin Corasa8e71c82019-10-22 19:01:39 -0700758transport_update_time (clib_time_type_t time_now, u8 thread_index)
Florin Coras561af9b2017-12-09 10:19:43 -0800759{
760 transport_proto_vft_t *vft;
761 vec_foreach (vft, tp_vfts)
762 {
763 if (vft->update_time)
764 (vft->update_time) (time_now, thread_index);
765 }
766}
767
768void
769transport_enable_disable (vlib_main_t * vm, u8 is_en)
770{
771 transport_proto_vft_t *vft;
772 vec_foreach (vft, tp_vfts)
773 {
774 if (vft->enable)
775 (vft->enable) (vm, is_en);
776 }
777}
778
779void
Florin Coras3cbc04b2017-10-02 00:18:51 -0700780transport_init (void)
781{
782 vlib_thread_main_t *vtm = vlib_get_thread_main ();
Florin Coras31c99552019-03-01 13:00:58 -0800783 session_main_t *smm = vnet_get_session_main ();
Florin Coras3cbc04b2017-10-02 00:18:51 -0700784 u32 num_threads;
785
Florin Coras93e65802017-11-29 00:07:11 -0500786 if (smm->local_endpoints_table_buckets == 0)
787 smm->local_endpoints_table_buckets = 250000;
788 if (smm->local_endpoints_table_memory == 0)
789 smm->local_endpoints_table_memory = 512 << 20;
790
Florin Coras3cbc04b2017-10-02 00:18:51 -0700791 /* Initialize [port-allocator] random number seed */
792 port_allocator_seed = (u32) clib_cpu_time_now ();
793
794 clib_bihash_init_24_8 (&local_endpoints_table, "local endpoints table",
Florin Coras93e65802017-11-29 00:07:11 -0500795 smm->local_endpoints_table_buckets,
796 smm->local_endpoints_table_memory);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700797 num_threads = 1 /* main thread */ + vtm->n_threads;
798 if (num_threads > 1)
799 clib_spinlock_init (&local_endpoints_lock);
800}
801
802/*
803 * fd.io coding-style-patch-verification: ON
804 *
805 * Local Variables:
806 * eval: (c-set-style "gnu")
807 * End:
808 */