blob: 02b0cced3f746fb0e1351d9f2f5f37150fecdf74 [file] [log] [blame]
Dave Barach68b0fb02017-02-28 15:15:56 -05001/*
2 * Copyright (c) 2017 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:
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/**
16 * @file
17 * @brief Session and session manager
18 */
19
20#include <vnet/session/session.h>
21#include <vlibmemory/api.h>
22#include <vnet/dpo/load_balance.h>
23#include <vnet/fib/ip4_fib.h>
24#include <vnet/session/application.h>
Florin Corasa0b34a72017-03-07 01:20:52 -080025#include <vnet/tcp/tcp.h>
Florin Corase69f4952017-03-07 10:06:24 -080026#include <vnet/session/session_debug.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050027
28/**
29 * Per-type vector of transport protocol virtual function tables
30 */
31static transport_proto_vft_t *tp_vfts;
32
33session_manager_main_t session_manager_main;
34
35/*
36 * Session lookup key; (src-ip, dst-ip, src-port, dst-port, session-type)
37 * Value: (owner thread index << 32 | session_index);
38 */
Florin Coras6cf30ad2017-04-04 23:08:23 -070039void
40stream_session_table_add_for_tc (transport_connection_t * tc, u64 value)
Dave Barach68b0fb02017-02-28 15:15:56 -050041{
42 session_manager_main_t *smm = &session_manager_main;
43 session_kv4_t kv4;
44 session_kv6_t kv6;
45
Florin Coras6cf30ad2017-04-04 23:08:23 -070046 switch (tc->proto)
Dave Barach68b0fb02017-02-28 15:15:56 -050047 {
48 case SESSION_TYPE_IP4_UDP:
49 case SESSION_TYPE_IP4_TCP:
50 make_v4_ss_kv_from_tc (&kv4, tc);
51 kv4.value = value;
52 clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4, 1 /* is_add */ );
53 break;
54 case SESSION_TYPE_IP6_UDP:
55 case SESSION_TYPE_IP6_TCP:
56 make_v6_ss_kv_from_tc (&kv6, tc);
57 kv6.value = value;
58 clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6, 1 /* is_add */ );
59 break;
60 default:
61 clib_warning ("Session type not supported");
62 ASSERT (0);
63 }
64}
65
66void
67stream_session_table_add (session_manager_main_t * smm, stream_session_t * s,
68 u64 value)
69{
70 transport_connection_t *tc;
71
72 tc = tp_vfts[s->session_type].get_connection (s->connection_index,
73 s->thread_index);
Florin Coras6cf30ad2017-04-04 23:08:23 -070074 stream_session_table_add_for_tc (tc, value);
Dave Barach68b0fb02017-02-28 15:15:56 -050075}
76
77static void
Florin Coras6cf30ad2017-04-04 23:08:23 -070078stream_session_half_open_table_add (session_type_t sst,
79 transport_connection_t * tc, u64 value)
Dave Barach68b0fb02017-02-28 15:15:56 -050080{
81 session_manager_main_t *smm = &session_manager_main;
82 session_kv4_t kv4;
83 session_kv6_t kv6;
84
85 switch (sst)
86 {
87 case SESSION_TYPE_IP4_UDP:
88 case SESSION_TYPE_IP4_TCP:
89 make_v4_ss_kv_from_tc (&kv4, tc);
90 kv4.value = value;
91 clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4,
92 1 /* is_add */ );
93 break;
94 case SESSION_TYPE_IP6_UDP:
95 case SESSION_TYPE_IP6_TCP:
96 make_v6_ss_kv_from_tc (&kv6, tc);
97 kv6.value = value;
98 clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6,
99 1 /* is_add */ );
100 break;
101 default:
102 clib_warning ("Session type not supported");
103 ASSERT (0);
104 }
105}
106
Florin Coras6cf30ad2017-04-04 23:08:23 -0700107int
108stream_session_table_del_for_tc (transport_connection_t * tc)
Dave Barach68b0fb02017-02-28 15:15:56 -0500109{
Florin Coras6cf30ad2017-04-04 23:08:23 -0700110 session_manager_main_t *smm = &session_manager_main;
Dave Barach68b0fb02017-02-28 15:15:56 -0500111 session_kv4_t kv4;
112 session_kv6_t kv6;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700113 switch (tc->proto)
Dave Barach68b0fb02017-02-28 15:15:56 -0500114 {
115 case SESSION_TYPE_IP4_UDP:
116 case SESSION_TYPE_IP4_TCP:
117 make_v4_ss_kv_from_tc (&kv4, tc);
118 return clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4,
119 0 /* is_add */ );
120 break;
121 case SESSION_TYPE_IP6_UDP:
122 case SESSION_TYPE_IP6_TCP:
123 make_v6_ss_kv_from_tc (&kv6, tc);
124 return clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6,
125 0 /* is_add */ );
126 break;
127 default:
128 clib_warning ("Session type not supported");
129 ASSERT (0);
130 }
131
132 return 0;
133}
134
135static int
136stream_session_table_del (session_manager_main_t * smm, stream_session_t * s)
137{
138 transport_connection_t *ts;
139
140 ts = tp_vfts[s->session_type].get_connection (s->connection_index,
141 s->thread_index);
Florin Coras6cf30ad2017-04-04 23:08:23 -0700142 return stream_session_table_del_for_tc (ts);
Dave Barach68b0fb02017-02-28 15:15:56 -0500143}
144
145static void
146stream_session_half_open_table_del (session_manager_main_t * smm, u8 sst,
147 transport_connection_t * tc)
148{
149 session_kv4_t kv4;
150 session_kv6_t kv6;
151
152 switch (sst)
153 {
154 case SESSION_TYPE_IP4_UDP:
155 case SESSION_TYPE_IP4_TCP:
156 make_v4_ss_kv_from_tc (&kv4, tc);
157 clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4,
158 0 /* is_add */ );
159 break;
160 case SESSION_TYPE_IP6_UDP:
161 case SESSION_TYPE_IP6_TCP:
162 make_v6_ss_kv_from_tc (&kv6, tc);
163 clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6,
164 0 /* is_add */ );
165 break;
166 default:
167 clib_warning ("Session type not supported");
168 ASSERT (0);
169 }
170}
171
172stream_session_t *
173stream_session_lookup_listener4 (ip4_address_t * lcl, u16 lcl_port, u8 proto)
174{
175 session_manager_main_t *smm = &session_manager_main;
176 session_kv4_t kv4;
177 int rv;
178
179 make_v4_listener_kv (&kv4, lcl, lcl_port, proto);
180 rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
181 if (rv == 0)
182 return pool_elt_at_index (smm->listen_sessions[proto], (u32) kv4.value);
183
184 /* Zero out the lcl ip */
185 kv4.key[0] = 0;
186 rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
187 if (rv == 0)
188 return pool_elt_at_index (smm->listen_sessions[proto], kv4.value);
189
190 return 0;
191}
192
193/** Looks up a session based on the 5-tuple passed as argument.
194 *
195 * First it tries to find an established session, if this fails, it tries
196 * finding a listener session if this fails, it tries a lookup with a
197 * wildcarded local source (listener bound to all interfaces)
198 */
199stream_session_t *
200stream_session_lookup4 (ip4_address_t * lcl, ip4_address_t * rmt,
201 u16 lcl_port, u16 rmt_port, u8 proto,
202 u32 my_thread_index)
203{
204 session_manager_main_t *smm = &session_manager_main;
205 session_kv4_t kv4;
206 int rv;
207
208 /* Lookup session amongst established ones */
209 make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto);
210 rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
211 if (rv == 0)
212 return stream_session_get_tsi (kv4.value, my_thread_index);
213
214 /* If nothing is found, check if any listener is available */
215 return stream_session_lookup_listener4 (lcl, lcl_port, proto);
216}
217
218stream_session_t *
219stream_session_lookup_listener6 (ip6_address_t * lcl, u16 lcl_port, u8 proto)
220{
221 session_manager_main_t *smm = &session_manager_main;
222 session_kv6_t kv6;
223 int rv;
224
225 make_v6_listener_kv (&kv6, lcl, lcl_port, proto);
226 rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
227 if (rv == 0)
228 return pool_elt_at_index (smm->listen_sessions[proto], kv6.value);
229
230 /* Zero out the lcl ip */
231 kv6.key[0] = kv6.key[1] = 0;
232 rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
233 if (rv == 0)
234 return pool_elt_at_index (smm->listen_sessions[proto], kv6.value);
235
236 return 0;
237}
238
239/* Looks up a session based on the 5-tuple passed as argument.
240 * First it tries to find an established session, if this fails, it tries
241 * finding a listener session if this fails, it tries a lookup with a
242 * wildcarded local source (listener bound to all interfaces) */
243stream_session_t *
244stream_session_lookup6 (ip6_address_t * lcl, ip6_address_t * rmt,
245 u16 lcl_port, u16 rmt_port, u8 proto,
246 u32 my_thread_index)
247{
248 session_manager_main_t *smm = vnet_get_session_manager_main ();
249 session_kv6_t kv6;
250 int rv;
251
252 make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto);
253 rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
254 if (rv == 0)
255 return stream_session_get_tsi (kv6.value, my_thread_index);
256
257 /* If nothing is found, check if any listener is available */
258 return stream_session_lookup_listener6 (lcl, lcl_port, proto);
259}
260
261stream_session_t *
262stream_session_lookup_listener (ip46_address_t * lcl, u16 lcl_port, u8 proto)
263{
264 switch (proto)
265 {
266 case SESSION_TYPE_IP4_UDP:
267 case SESSION_TYPE_IP4_TCP:
268 return stream_session_lookup_listener4 (&lcl->ip4, lcl_port, proto);
269 break;
270 case SESSION_TYPE_IP6_UDP:
271 case SESSION_TYPE_IP6_TCP:
272 return stream_session_lookup_listener6 (&lcl->ip6, lcl_port, proto);
273 break;
274 }
275 return 0;
276}
277
278static u64
279stream_session_half_open_lookup (session_manager_main_t * smm,
280 ip46_address_t * lcl, ip46_address_t * rmt,
281 u16 lcl_port, u16 rmt_port, u8 proto)
282{
283 session_kv4_t kv4;
284 session_kv6_t kv6;
285 int rv;
286
287 switch (proto)
288 {
289 case SESSION_TYPE_IP4_UDP:
290 case SESSION_TYPE_IP4_TCP:
291 make_v4_ss_kv (&kv4, &lcl->ip4, &rmt->ip4, lcl_port, rmt_port, proto);
292 rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4);
293
294 if (rv == 0)
295 return kv4.value;
296
297 return (u64) ~ 0;
298 break;
299 case SESSION_TYPE_IP6_UDP:
300 case SESSION_TYPE_IP6_TCP:
301 make_v6_ss_kv (&kv6, &lcl->ip6, &rmt->ip6, lcl_port, rmt_port, proto);
302 rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6);
303
304 if (rv == 0)
305 return kv6.value;
306
307 return (u64) ~ 0;
308 break;
309 }
310 return 0;
311}
312
313transport_connection_t *
Florin Corase04c2992017-03-01 08:17:34 -0800314stream_session_lookup_transport4 (ip4_address_t * lcl, ip4_address_t * rmt,
Dave Barach68b0fb02017-02-28 15:15:56 -0500315 u16 lcl_port, u16 rmt_port, u8 proto,
316 u32 my_thread_index)
317{
Florin Corase04c2992017-03-01 08:17:34 -0800318 session_manager_main_t *smm = &session_manager_main;
Dave Barach68b0fb02017-02-28 15:15:56 -0500319 session_kv4_t kv4;
320 stream_session_t *s;
321 int rv;
322
323 /* Lookup session amongst established ones */
324 make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto);
325 rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
326 if (rv == 0)
327 {
328 s = stream_session_get_tsi (kv4.value, my_thread_index);
329
330 return tp_vfts[s->session_type].get_connection (s->connection_index,
331 my_thread_index);
332 }
333
334 /* If nothing is found, check if any listener is available */
335 s = stream_session_lookup_listener4 (lcl, lcl_port, proto);
336 if (s)
337 return tp_vfts[s->session_type].get_listener (s->connection_index);
338
339 /* Finally, try half-open connections */
340 rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4);
341 if (rv == 0)
342 return tp_vfts[proto].get_half_open (kv4.value & 0xFFFFFFFF);
343
344 return 0;
345}
346
347transport_connection_t *
Florin Corase04c2992017-03-01 08:17:34 -0800348stream_session_lookup_transport6 (ip6_address_t * lcl, ip6_address_t * rmt,
Dave Barach68b0fb02017-02-28 15:15:56 -0500349 u16 lcl_port, u16 rmt_port, u8 proto,
350 u32 my_thread_index)
351{
Florin Corase04c2992017-03-01 08:17:34 -0800352 session_manager_main_t *smm = &session_manager_main;
Dave Barach68b0fb02017-02-28 15:15:56 -0500353 stream_session_t *s;
354 session_kv6_t kv6;
355 int rv;
356
357 make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto);
358 rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
359 if (rv == 0)
360 {
361 s = stream_session_get_tsi (kv6.value, my_thread_index);
362
363 return tp_vfts[s->session_type].get_connection (s->connection_index,
364 my_thread_index);
365 }
366
367 /* If nothing is found, check if any listener is available */
368 s = stream_session_lookup_listener6 (lcl, lcl_port, proto);
369 if (s)
370 return tp_vfts[s->session_type].get_listener (s->connection_index);
371
372 /* Finally, try half-open connections */
373 rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6);
374 if (rv == 0)
Florin Corasd79b41e2017-03-04 05:37:52 -0800375 return tp_vfts[proto].get_half_open (kv6.value & 0xFFFFFFFF);
Dave Barach68b0fb02017-02-28 15:15:56 -0500376
377 return 0;
378}
379
Dave Barach68b0fb02017-02-28 15:15:56 -0500380int
Florin Coras6cf30ad2017-04-04 23:08:23 -0700381stream_session_create_i (segment_manager_t * sm, transport_connection_t * tc,
Dave Barach68b0fb02017-02-28 15:15:56 -0500382 stream_session_t ** ret_s)
383{
Florin Coras6cf30ad2017-04-04 23:08:23 -0700384 session_manager_main_t *smm = &session_manager_main;
Dave Barach68b0fb02017-02-28 15:15:56 -0500385 svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
386 u32 fifo_segment_index;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700387 u32 pool_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500388 stream_session_t *s;
389 u64 value;
390 u32 thread_index = tc->thread_index;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700391 int rv;
Dave Barach68b0fb02017-02-28 15:15:56 -0500392
Florin Coras6cf30ad2017-04-04 23:08:23 -0700393 if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo,
394 &server_tx_fifo,
395 &fifo_segment_index)))
Dave Barach68b0fb02017-02-28 15:15:56 -0500396 return rv;
397
Dave Barach68b0fb02017-02-28 15:15:56 -0500398 /* Create the session */
Dave Barach1015a1e2017-05-08 19:15:03 -0400399 pool_get_aligned (smm->sessions[thread_index], s, CLIB_CACHE_LINE_BYTES);
Dave Barach68b0fb02017-02-28 15:15:56 -0500400 memset (s, 0, sizeof (*s));
401
402 /* Initialize backpointers */
403 pool_index = s - smm->sessions[thread_index];
Florin Corasa5464812017-04-19 13:00:05 -0700404 server_rx_fifo->master_session_index = pool_index;
405 server_rx_fifo->master_thread_index = thread_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500406
Florin Corasa5464812017-04-19 13:00:05 -0700407 server_tx_fifo->master_session_index = pool_index;
408 server_tx_fifo->master_thread_index = thread_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500409
410 s->server_rx_fifo = server_rx_fifo;
411 s->server_tx_fifo = server_tx_fifo;
412
413 /* Initialize state machine, such as it is... */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700414 s->session_type = tc->proto;
Dave Barach68b0fb02017-02-28 15:15:56 -0500415 s->session_state = SESSION_STATE_CONNECTING;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700416 s->svm_segment_index = fifo_segment_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500417 s->thread_index = thread_index;
418 s->session_index = pool_index;
419
420 /* Attach transport to session */
421 s->connection_index = tc->c_index;
422
423 /* Attach session to transport */
424 tc->s_index = s->session_index;
425
426 /* Add to the main lookup table */
427 value = (((u64) thread_index) << 32) | (u64) s->session_index;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700428 stream_session_table_add_for_tc (tc, value);
Dave Barach68b0fb02017-02-28 15:15:56 -0500429
430 *ret_s = s;
431
432 return 0;
433}
434
Florin Corasf6d68ed2017-05-07 19:12:02 -0700435/** Enqueue buffer chain tail */
436always_inline int
437session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b,
438 u32 offset, u8 is_in_order)
439{
440 vlib_buffer_t *chain_b;
441 u32 chain_bi = b->next_buffer;
442 vlib_main_t *vm = vlib_get_main ();
443 u8 *data, len;
444 u16 written = 0;
445 int rv = 0;
446
447 do
448 {
449 chain_b = vlib_get_buffer (vm, chain_bi);
450 data = vlib_buffer_get_current (chain_b);
451 len = chain_b->current_length;
452 if (is_in_order)
453 {
454 rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data);
455 if (rv < len)
456 {
457 return (rv > 0) ? (written + rv) : written;
458 }
459 written += rv;
460 }
461 else
462 {
463 rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len,
464 data);
465 if (rv)
466 return -1;
467 offset += len;
468 }
469 }
470 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
471 ? chain_b->next_buffer : 0));
472
473 if (is_in_order)
474 return written;
475
476 return 0;
477}
478
Dave Barach68b0fb02017-02-28 15:15:56 -0500479/*
480 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
481 * event but on request can queue notification events for later delivery by
482 * calling stream_server_flush_enqueue_events().
483 *
484 * @param tc Transport connection which is to be enqueued data
Florin Corasf6d68ed2017-05-07 19:12:02 -0700485 * @param b Buffer to be enqueued
486 * @param offset Offset at which to start enqueueing if out-of-order
Dave Barach68b0fb02017-02-28 15:15:56 -0500487 * @param queue_event Flag to indicate if peer is to be notified or if event
488 * is to be queued. The former is useful when more data is
489 * enqueued and only one event is to be generated.
Florin Corasf6d68ed2017-05-07 19:12:02 -0700490 * @param is_in_order Flag to indicate if data is in order
Dave Barach68b0fb02017-02-28 15:15:56 -0500491 * @return Number of bytes enqueued or a negative value if enqueueing failed.
492 */
493int
Florin Corasf6d68ed2017-05-07 19:12:02 -0700494stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b,
495 u32 offset, u8 queue_event, u8 is_in_order)
Dave Barach68b0fb02017-02-28 15:15:56 -0500496{
497 stream_session_t *s;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700498 int enqueued = 0, rv;
Dave Barach68b0fb02017-02-28 15:15:56 -0500499
500 s = stream_session_get (tc->s_index, tc->thread_index);
501
Florin Corasf6d68ed2017-05-07 19:12:02 -0700502 if (is_in_order)
503 {
504 enqueued =
505 svm_fifo_enqueue_nowait (s->server_rx_fifo, b->current_length,
506 vlib_buffer_get_current (b));
507 if (PREDICT_FALSE
508 ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued > 0))
509 {
510 rv = session_enqueue_chain_tail (s, b, 0, 1);
511 if (rv <= 0)
512 return enqueued;
513 enqueued += rv;
514 }
515 }
516 else
517 {
518 rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset,
519 b->current_length,
520 vlib_buffer_get_current (b));
521 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
522 rv = session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
523 if (rv)
524 return -1;
525 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500526
527 if (queue_event)
528 {
529 /* Queue RX event on this fifo. Eventually these will need to be flushed
530 * by calling stream_server_flush_enqueue_events () */
531 session_manager_main_t *smm = vnet_get_session_manager_main ();
532 u32 thread_index = s->thread_index;
533 u32 my_enqueue_epoch = smm->current_enqueue_epoch[thread_index];
534
535 if (s->enqueue_epoch != my_enqueue_epoch)
536 {
537 s->enqueue_epoch = my_enqueue_epoch;
538 vec_add1 (smm->session_indices_to_enqueue_by_thread[thread_index],
539 s - smm->sessions[thread_index]);
540 }
541 }
542
Florin Corasf6d68ed2017-05-07 19:12:02 -0700543 if (is_in_order)
544 return enqueued;
545
546 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500547}
548
549/** Check if we have space in rx fifo to push more bytes */
550u8
551stream_session_no_space (transport_connection_t * tc, u32 thread_index,
552 u16 data_len)
553{
554 stream_session_t *s = stream_session_get (tc->c_index, thread_index);
555
556 if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY))
557 return 1;
558
559 if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo))
560 return 1;
561
562 return 0;
563}
564
565u32
566stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer,
567 u32 offset, u32 max_bytes)
568{
569 stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
Florin Corasa5464812017-04-19 13:00:05 -0700570 return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer);
Dave Barach68b0fb02017-02-28 15:15:56 -0500571}
572
573u32
574stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
575{
576 stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
Florin Corasa5464812017-04-19 13:00:05 -0700577 return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes);
Dave Barach68b0fb02017-02-28 15:15:56 -0500578}
579
580/**
581 * Notify session peer that new data has been enqueued.
582 *
583 * @param s Stream session for which the event is to be generated.
584 * @param block Flag to indicate if call should block if event queue is full.
585 *
586 * @return 0 on succes or negative number if failed to send notification.
587 */
588static int
589stream_session_enqueue_notify (stream_session_t * s, u8 block)
590{
591 application_t *app;
592 session_fifo_event_t evt;
593 unix_shared_memory_queue_t *q;
594 static u32 serial_number;
595
596 if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
597 return 0;
598
599 /* Get session's server */
600 app = application_get (s->app_index);
601
Florin Corasd79b41e2017-03-04 05:37:52 -0800602 /* Built-in server? Hand event to the callback... */
603 if (app->cb_fns.builtin_server_rx_callback)
Florin Coras6792ec02017-03-13 03:49:51 -0700604 return app->cb_fns.builtin_server_rx_callback (s);
Florin Corasd79b41e2017-03-04 05:37:52 -0800605
Florin Coras6792ec02017-03-13 03:49:51 -0700606 /* If no event, send one */
607 if (svm_fifo_set_event (s->server_rx_fifo))
608 {
609 /* Fabricate event */
610 evt.fifo = s->server_rx_fifo;
Florin Corasa5464812017-04-19 13:00:05 -0700611 evt.event_type = FIFO_EVENT_APP_RX;
Florin Coras6792ec02017-03-13 03:49:51 -0700612 evt.event_id = serial_number++;
Dave Barach68b0fb02017-02-28 15:15:56 -0500613
Florin Coras6792ec02017-03-13 03:49:51 -0700614 /* Add event to server's event queue */
615 q = app->event_queue;
616
617 /* Based on request block (or not) for lack of space */
618 if (block || PREDICT_TRUE (q->cursize < q->maxsize))
619 unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt,
620 0 /* do wait for mutex */ );
621 else
622 {
623 clib_warning ("fifo full");
624 return -1;
625 }
626 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500627
Florin Corase69f4952017-03-07 10:06:24 -0800628 /* *INDENT-OFF* */
Florin Coras6792ec02017-03-13 03:49:51 -0700629 SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({
Dave Barach68b0fb02017-02-28 15:15:56 -0500630 ed->data[0] = evt.event_id;
Florin Coras6792ec02017-03-13 03:49:51 -0700631 ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo);
Florin Corase69f4952017-03-07 10:06:24 -0800632 }));
633 /* *INDENT-ON* */
Dave Barach68b0fb02017-02-28 15:15:56 -0500634
635 return 0;
636}
637
638/**
639 * Flushes queue of sessions that are to be notified of new data
640 * enqueued events.
641 *
642 * @param thread_index Thread index for which the flush is to be performed.
643 * @return 0 on success or a positive number indicating the number of
644 * failures due to API queue being full.
645 */
646int
647session_manager_flush_enqueue_events (u32 thread_index)
648{
649 session_manager_main_t *smm = &session_manager_main;
650 u32 *session_indices_to_enqueue;
651 int i, errors = 0;
652
653 session_indices_to_enqueue =
654 smm->session_indices_to_enqueue_by_thread[thread_index];
655
656 for (i = 0; i < vec_len (session_indices_to_enqueue); i++)
657 {
658 stream_session_t *s0;
659
660 /* Get session */
661 s0 = stream_session_get (session_indices_to_enqueue[i], thread_index);
662 if (stream_session_enqueue_notify (s0, 0 /* don't block */ ))
663 {
664 errors++;
665 }
666 }
667
668 vec_reset_length (session_indices_to_enqueue);
669
670 smm->session_indices_to_enqueue_by_thread[thread_index] =
671 session_indices_to_enqueue;
672
673 /* Increment enqueue epoch for next round */
674 smm->current_enqueue_epoch[thread_index]++;
675
676 return errors;
677}
678
Florin Corasc28764f2017-04-26 00:08:42 -0700679/**
680 * Init fifo tail and head pointers
681 *
682 * Useful if transport uses absolute offsets for tracking ooo segments.
683 */
684void
685stream_session_init_fifos_pointers (transport_connection_t * tc,
686 u32 rx_pointer, u32 tx_pointer)
687{
688 stream_session_t *s;
689 s = stream_session_get (tc->s_index, tc->thread_index);
690 svm_fifo_init_pointers (s->server_rx_fifo, rx_pointer);
691 svm_fifo_init_pointers (s->server_tx_fifo, tx_pointer);
692}
693
Dave Barach68b0fb02017-02-28 15:15:56 -0500694void
695stream_session_connect_notify (transport_connection_t * tc, u8 sst,
696 u8 is_fail)
697{
698 session_manager_main_t *smm = &session_manager_main;
699 application_t *app;
700 stream_session_t *new_s = 0;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700701 u64 handle;
702 u32 api_context = 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500703
Florin Coras6cf30ad2017-04-04 23:08:23 -0700704 handle = stream_session_half_open_lookup (smm, &tc->lcl_ip, &tc->rmt_ip,
705 tc->lcl_port, tc->rmt_port,
706 tc->proto);
707 if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
Dave Barach68b0fb02017-02-28 15:15:56 -0500708 {
709 clib_warning ("This can't be good!");
710 return;
711 }
712
Florin Coras6cf30ad2017-04-04 23:08:23 -0700713 /* Get the app's index from the handle we stored when opening connection */
714 app = application_get (handle >> 32);
715 api_context = tc->s_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500716
717 if (!is_fail)
718 {
Florin Coras6cf30ad2017-04-04 23:08:23 -0700719 segment_manager_t *sm;
720 sm = application_get_connect_segment_manager (app);
721
722 /* Create new session (svm segments are allocated if needed) */
723 if (stream_session_create_i (sm, tc, &new_s))
Dave Barach68b0fb02017-02-28 15:15:56 -0500724 return;
725
Florin Coras6cf30ad2017-04-04 23:08:23 -0700726 new_s->app_index = app->index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500727 }
728
729 /* Notify client */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700730 app->cb_fns.session_connected_callback (app->index, api_context, new_s,
Dave Barach68b0fb02017-02-28 15:15:56 -0500731 is_fail);
732
733 /* Cleanup session lookup */
734 stream_session_half_open_table_del (smm, sst, tc);
735}
736
737void
738stream_session_accept_notify (transport_connection_t * tc)
739{
740 application_t *server;
741 stream_session_t *s;
742
743 s = stream_session_get (tc->s_index, tc->thread_index);
744 server = application_get (s->app_index);
745 server->cb_fns.session_accept_callback (s);
746}
747
748/**
749 * Notification from transport that connection is being closed.
750 *
751 * A disconnect is sent to application but state is not removed. Once
752 * disconnect is acknowledged by application, session disconnect is called.
753 * Ultimately this leads to close being called on transport (passive close).
754 */
755void
756stream_session_disconnect_notify (transport_connection_t * tc)
757{
758 application_t *server;
759 stream_session_t *s;
760
761 s = stream_session_get (tc->s_index, tc->thread_index);
762 server = application_get (s->app_index);
763 server->cb_fns.session_disconnect_callback (s);
764}
765
766/**
767 * Cleans up session and associated app if needed.
768 */
769void
770stream_session_delete (stream_session_t * s)
771{
772 session_manager_main_t *smm = vnet_get_session_manager_main ();
Dave Barach68b0fb02017-02-28 15:15:56 -0500773
Florin Corasd79b41e2017-03-04 05:37:52 -0800774 /* Delete from the main lookup table. */
775 stream_session_table_del (smm, s);
Dave Barach68b0fb02017-02-28 15:15:56 -0500776
777 /* Cleanup fifo segments */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700778 segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
779 s->server_tx_fifo);
Dave Barach68b0fb02017-02-28 15:15:56 -0500780
781 pool_put (smm->sessions[s->thread_index], s);
782}
783
784/**
785 * Notification from transport that connection is being deleted
786 *
787 * This should be called only on previously fully established sessions. For
788 * instance failed connects should call stream_session_connect_notify and
789 * indicate that the connect has failed.
790 */
791void
792stream_session_delete_notify (transport_connection_t * tc)
793{
794 stream_session_t *s;
795
Florin Corase04c2992017-03-01 08:17:34 -0800796 /* App might've been removed already */
Dave Barach68b0fb02017-02-28 15:15:56 -0500797 s = stream_session_get_if_valid (tc->s_index, tc->thread_index);
798 if (!s)
799 {
Dave Barach68b0fb02017-02-28 15:15:56 -0500800 return;
801 }
802 stream_session_delete (s);
803}
804
805/**
806 * Notify application that connection has been reset.
807 */
808void
809stream_session_reset_notify (transport_connection_t * tc)
810{
811 stream_session_t *s;
812 application_t *app;
813 s = stream_session_get (tc->s_index, tc->thread_index);
814
815 app = application_get (s->app_index);
816 app->cb_fns.session_reset_callback (s);
817}
818
819/**
820 * Accept a stream session. Optionally ping the server by callback.
821 */
822int
823stream_session_accept (transport_connection_t * tc, u32 listener_index,
824 u8 sst, u8 notify)
825{
Dave Barach68b0fb02017-02-28 15:15:56 -0500826 application_t *server;
827 stream_session_t *s, *listener;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700828 segment_manager_t *sm;
Dave Barach68b0fb02017-02-28 15:15:56 -0500829
830 int rv;
831
832 /* Find the server */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700833 listener = listen_session_get (sst, listener_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500834 server = application_get (listener->app_index);
835
Florin Coras6cf30ad2017-04-04 23:08:23 -0700836 sm = application_get_listen_segment_manager (server, listener);
837 if ((rv = stream_session_create_i (sm, tc, &s)))
Dave Barach68b0fb02017-02-28 15:15:56 -0500838 return rv;
839
Florin Coras6cf30ad2017-04-04 23:08:23 -0700840 s->app_index = server->index;
841 s->listener_index = listener_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500842
843 /* Shoulder-tap the server */
844 if (notify)
845 {
846 server->cb_fns.session_accept_callback (s);
847 }
848
849 return 0;
850}
851
Florin Coras6cf30ad2017-04-04 23:08:23 -0700852/**
853 * Ask transport to open connection to remote transport endpoint.
854 *
855 * Stores handle for matching request with reply since the call can be
856 * asynchronous. For instance, for TCP the 3-way handshake must complete
857 * before reply comes. Session is only created once connection is established.
858 *
859 * @param app_index Index of the application requesting the connect
860 * @param st Session type requested.
861 * @param tep Remote transport endpoint
862 * @param res Resulting transport connection .
863 */
Florin Corase04c2992017-03-01 08:17:34 -0800864int
Florin Coras6cf30ad2017-04-04 23:08:23 -0700865stream_session_open (u32 app_index, session_type_t st,
866 transport_endpoint_t * tep,
867 transport_connection_t ** res)
Dave Barach68b0fb02017-02-28 15:15:56 -0500868{
869 transport_connection_t *tc;
Florin Corase04c2992017-03-01 08:17:34 -0800870 int rv;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700871 u64 handle;
Dave Barach68b0fb02017-02-28 15:15:56 -0500872
Florin Coras6cf30ad2017-04-04 23:08:23 -0700873 rv = tp_vfts[st].open (&tep->ip, tep->port);
Florin Corase04c2992017-03-01 08:17:34 -0800874 if (rv < 0)
875 {
876 clib_warning ("Transport failed to open connection.");
877 return VNET_API_ERROR_SESSION_CONNECT_FAIL;
878 }
879
Florin Coras6cf30ad2017-04-04 23:08:23 -0700880 tc = tp_vfts[st].get_half_open ((u32) rv);
Dave Barach68b0fb02017-02-28 15:15:56 -0500881
Florin Coras6cf30ad2017-04-04 23:08:23 -0700882 /* Save app and tc index. The latter is needed to help establish the
883 * connection while the former is needed when the connect notify comes
884 * and we have to notify the external app */
885 handle = (((u64) app_index) << 32) | (u64) tc->c_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500886
887 /* Add to the half-open lookup table */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700888 stream_session_half_open_table_add (st, tc, handle);
Florin Corase04c2992017-03-01 08:17:34 -0800889
Florin Coras6cf30ad2017-04-04 23:08:23 -0700890 *res = tc;
891
892 return 0;
893}
894
895/**
896 * Ask transport to listen on local transport endpoint.
897 *
898 * @param s Session for which listen will be called. Note that unlike
899 * established sessions, listen sessions are not associated to a
900 * thread.
901 * @param tep Local endpoint to be listened on.
902 */
903int
904stream_session_listen (stream_session_t * s, transport_endpoint_t * tep)
905{
906 transport_connection_t *tc;
907 u32 tci;
908
909 /* Transport bind/listen */
910 tci = tp_vfts[s->session_type].bind (s->session_index, &tep->ip, tep->port);
911
912 if (tci == (u32) ~ 0)
913 return -1;
914
915 /* Attach transport to session */
916 s->connection_index = tci;
917 tc = tp_vfts[s->session_type].get_listener (tci);
918
919 /* Weird but handle it ... */
920 if (tc == 0)
921 return -1;
922
923 /* Add to the main lookup table */
924 stream_session_table_add_for_tc (tc, s->session_index);
925
926 return 0;
927}
928
929/**
930 * Ask transport to stop listening on local transport endpoint.
931 *
932 * @param s Session to stop listening on. It must be in state LISTENING.
933 */
934int
935stream_session_stop_listen (stream_session_t * s)
936{
937 transport_connection_t *tc;
938
939 if (s->session_state != SESSION_STATE_LISTENING)
940 {
941 clib_warning ("not a listening session");
942 return -1;
943 }
944
945 tc = tp_vfts[s->session_type].get_listener (s->connection_index);
946 if (!tc)
947 {
948 clib_warning ("no transport");
949 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
950 }
951
952 stream_session_table_del_for_tc (tc);
953 tp_vfts[s->session_type].unbind (s->connection_index);
Florin Corase04c2992017-03-01 08:17:34 -0800954 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500955}
956
Florin Corasa5464812017-04-19 13:00:05 -0700957void
958session_send_session_evt_to_thread (u64 session_handle,
959 fifo_event_type_t evt_type,
960 u32 thread_index)
961{
962 static u16 serial_number = 0;
963 session_fifo_event_t evt;
964 unix_shared_memory_queue_t *q;
965
966 /* Fabricate event */
967 evt.session_handle = session_handle;
968 evt.event_type = evt_type;
969 evt.event_id = serial_number++;
970
971 q = session_manager_get_vpp_event_queue (thread_index);
972
973 /* Based on request block (or not) for lack of space */
974 if (PREDICT_TRUE (q->cursize < q->maxsize))
975 unix_shared_memory_queue_add (q, (u8 *) & evt,
976 0 /* do wait for mutex */ );
977 else
978 {
979 clib_warning ("queue full");
980 return;
981 }
982}
983
Dave Barach68b0fb02017-02-28 15:15:56 -0500984/**
985 * Disconnect session and propagate to transport. This should eventually
986 * result in a delete notification that allows us to cleanup session state.
987 * Called for both active/passive disconnects.
Florin Corasa5464812017-04-19 13:00:05 -0700988 *
989 * Should be called from the session's thread.
Dave Barach68b0fb02017-02-28 15:15:56 -0500990 */
991void
992stream_session_disconnect (stream_session_t * s)
993{
Dave Barach68b0fb02017-02-28 15:15:56 -0500994 s->session_state = SESSION_STATE_CLOSED;
Florin Corasd79b41e2017-03-04 05:37:52 -0800995 tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500996}
997
998/**
999 * Cleanup transport and session state.
Florin Corasd79b41e2017-03-04 05:37:52 -08001000 *
1001 * Notify transport of the cleanup, wait for a delete notify to actually
1002 * remove the session state.
Dave Barach68b0fb02017-02-28 15:15:56 -05001003 */
1004void
1005stream_session_cleanup (stream_session_t * s)
1006{
Florin Corasd79b41e2017-03-04 05:37:52 -08001007 session_manager_main_t *smm = &session_manager_main;
1008 int rv;
1009
1010 s->session_state = SESSION_STATE_CLOSED;
1011
1012 /* Delete from the main lookup table to avoid more enqueues */
1013 rv = stream_session_table_del (smm, s);
1014 if (rv)
1015 clib_warning ("hash delete error, rv %d", rv);
1016
Dave Barach68b0fb02017-02-28 15:15:56 -05001017 tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -05001018}
1019
1020void
1021session_register_transport (u8 type, const transport_proto_vft_t * vft)
1022{
1023 session_manager_main_t *smm = vnet_get_session_manager_main ();
1024
1025 vec_validate (tp_vfts, type);
1026 tp_vfts[type] = *vft;
1027
1028 /* If an offset function is provided, then peek instead of dequeue */
Florin Corase69f4952017-03-07 10:06:24 -08001029 smm->session_tx_fns[type] =
Florin Corasd79b41e2017-03-04 05:37:52 -08001030 (vft->tx_fifo_offset) ? session_tx_fifo_peek_and_snd :
1031 session_tx_fifo_dequeue_and_snd;
Dave Barach68b0fb02017-02-28 15:15:56 -05001032}
1033
1034transport_proto_vft_t *
1035session_get_transport_vft (u8 type)
1036{
1037 if (type >= vec_len (tp_vfts))
1038 return 0;
1039 return &tp_vfts[type];
1040}
1041
Florin Corasa5464812017-04-19 13:00:05 -07001042/**
1043 * Allocate vpp event queue (once) per worker thread
1044 */
1045void
1046session_vpp_event_queue_allocate (session_manager_main_t * smm,
1047 u32 thread_index)
1048{
1049 api_main_t *am = &api_main;
1050 void *oldheap;
Dave Barach10d8cc62017-05-30 09:30:07 -04001051 u32 event_queue_length = 2048;
Florin Corasa5464812017-04-19 13:00:05 -07001052
1053 if (smm->vpp_event_queues[thread_index] == 0)
1054 {
1055 /* Allocate event fifo in the /vpe-api shared-memory segment */
1056 oldheap = svm_push_data_heap (am->vlib_rp);
1057
Dave Barach10d8cc62017-05-30 09:30:07 -04001058 if (smm->configured_event_queue_length)
1059 event_queue_length = smm->configured_event_queue_length;
1060
Florin Corasa5464812017-04-19 13:00:05 -07001061 smm->vpp_event_queues[thread_index] =
Dave Barach10d8cc62017-05-30 09:30:07 -04001062 unix_shared_memory_queue_init
1063 (event_queue_length,
1064 sizeof (session_fifo_event_t), 0 /* consumer pid */ ,
1065 0 /* (do not) send signal when queue non-empty */ );
Florin Corasa5464812017-04-19 13:00:05 -07001066
1067 svm_pop_heap (oldheap);
1068 }
1069}
1070
Dave Barach68b0fb02017-02-28 15:15:56 -05001071static clib_error_t *
Florin Corase04c2992017-03-01 08:17:34 -08001072session_manager_main_enable (vlib_main_t * vm)
Dave Barach68b0fb02017-02-28 15:15:56 -05001073{
Dave Barach68b0fb02017-02-28 15:15:56 -05001074 session_manager_main_t *smm = &session_manager_main;
Florin Corase04c2992017-03-01 08:17:34 -08001075 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1076 u32 num_threads;
Dave Barach68b0fb02017-02-28 15:15:56 -05001077 int i;
1078
Dave Barach68b0fb02017-02-28 15:15:56 -05001079 num_threads = 1 /* main thread */ + vtm->n_threads;
1080
1081 if (num_threads < 1)
1082 return clib_error_return (0, "n_thread_stacks not set");
1083
1084 /* $$$ config parameters */
1085 svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ ,
1086 20 /* timeout in seconds */ );
1087
1088 /* configure per-thread ** vectors */
1089 vec_validate (smm->sessions, num_threads - 1);
1090 vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1);
1091 vec_validate (smm->tx_buffers, num_threads - 1);
Dave Barachacd2a6a2017-05-16 17:41:34 -04001092 vec_validate (smm->pending_event_vector, num_threads - 1);
1093 vec_validate (smm->free_event_vector, num_threads - 1);
Dave Barach68b0fb02017-02-28 15:15:56 -05001094 vec_validate (smm->current_enqueue_epoch, num_threads - 1);
1095 vec_validate (smm->vpp_event_queues, num_threads - 1);
1096
Dave Barachacd2a6a2017-05-16 17:41:34 -04001097 for (i = 0; i < num_threads; i++)
1098 {
1099 vec_validate (smm->free_event_vector[i], 0);
1100 _vec_len (smm->free_event_vector[i]) = 0;
1101 vec_validate (smm->pending_event_vector[i], 0);
1102 _vec_len (smm->pending_event_vector[i]) = 0;
1103 }
1104
Florin Coras3e350af2017-03-30 02:54:28 -07001105#if SESSION_DBG
1106 vec_validate (smm->last_event_poll_by_thread, num_threads - 1);
1107#endif
1108
Florin Coras6cf30ad2017-04-04 23:08:23 -07001109 /* Allocate vpp event queues */
1110 for (i = 0; i < vec_len (smm->vpp_event_queues); i++)
1111 session_vpp_event_queue_allocate (smm, i);
1112
Dave Barach68b0fb02017-02-28 15:15:56 -05001113 /* $$$$ preallocate hack config parameter */
1114 for (i = 0; i < 200000; i++)
1115 {
1116 stream_session_t *ss;
Dave Barach259cdae2017-05-15 16:27:05 -04001117 pool_get_aligned (smm->sessions[0], ss, CLIB_CACHE_LINE_BYTES);
Dave Barach68b0fb02017-02-28 15:15:56 -05001118 memset (ss, 0, sizeof (*ss));
1119 }
1120
1121 for (i = 0; i < 200000; i++)
1122 pool_put_index (smm->sessions[0], i);
1123
1124 clib_bihash_init_16_8 (&smm->v4_session_hash, "v4 session table",
1125 200000 /* $$$$ config parameter nbuckets */ ,
1126 (64 << 20) /*$$$ config parameter table size */ );
1127 clib_bihash_init_48_8 (&smm->v6_session_hash, "v6 session table",
1128 200000 /* $$$$ config parameter nbuckets */ ,
1129 (64 << 20) /*$$$ config parameter table size */ );
1130
1131 clib_bihash_init_16_8 (&smm->v4_half_open_hash, "v4 half-open table",
1132 200000 /* $$$$ config parameter nbuckets */ ,
1133 (64 << 20) /*$$$ config parameter table size */ );
1134 clib_bihash_init_48_8 (&smm->v6_half_open_hash, "v6 half-open table",
1135 200000 /* $$$$ config parameter nbuckets */ ,
1136 (64 << 20) /*$$$ config parameter table size */ );
1137
Florin Corase04c2992017-03-01 08:17:34 -08001138 smm->is_enabled = 1;
1139
Florin Corasa0b34a72017-03-07 01:20:52 -08001140 /* Enable TCP transport */
1141 vnet_tcp_enable_disable (vm, 1);
1142
Dave Barach68b0fb02017-02-28 15:15:56 -05001143 return 0;
1144}
1145
Florin Corasa5464812017-04-19 13:00:05 -07001146void
1147session_node_enable_disable (u8 is_en)
1148{
1149 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1150 /* *INDENT-OFF* */
1151 foreach_vlib_main (({
1152 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1153 state);
1154 }));
1155 /* *INDENT-ON* */
1156}
1157
Florin Corase04c2992017-03-01 08:17:34 -08001158clib_error_t *
1159vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1160{
1161 if (is_en)
1162 {
1163 if (session_manager_main.is_enabled)
1164 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -05001165
Florin Corasa5464812017-04-19 13:00:05 -07001166 session_node_enable_disable (is_en);
Florin Corase04c2992017-03-01 08:17:34 -08001167
1168 return session_manager_main_enable (vm);
1169 }
1170 else
1171 {
1172 session_manager_main.is_enabled = 0;
Florin Corasa5464812017-04-19 13:00:05 -07001173 session_node_enable_disable (is_en);
Florin Corase04c2992017-03-01 08:17:34 -08001174 }
1175
1176 return 0;
1177}
1178
Florin Corase04c2992017-03-01 08:17:34 -08001179clib_error_t *
1180session_manager_main_init (vlib_main_t * vm)
1181{
1182 session_manager_main_t *smm = &session_manager_main;
1183
1184 smm->vlib_main = vm;
1185 smm->vnet_main = vnet_get_main ();
1186 smm->is_enabled = 0;
1187
1188 return 0;
1189}
1190
1191VLIB_INIT_FUNCTION (session_manager_main_init)
Dave Barach10d8cc62017-05-30 09:30:07 -04001192 static clib_error_t *session_config_fn (vlib_main_t * vm,
1193 unformat_input_t * input)
1194{
1195 session_manager_main_t *smm = &session_manager_main;
1196 u32 nitems;
1197
1198 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1199 {
1200 if (unformat (input, "event-queue-length %d", &nitems))
1201 {
1202 if (nitems >= 2048)
1203 smm->configured_event_queue_length = nitems;
1204 else
1205 clib_warning ("event queue length %d too small, ignored", nitems);
1206 }
1207 else
1208 return clib_error_return (0, "unknown input `%U'",
1209 format_unformat_error, input);
1210 }
1211 return 0;
1212}
1213
1214VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1215
Dave Barach68b0fb02017-02-28 15:15:56 -05001216/*
1217 * fd.io coding-style-patch-verification: ON
1218 *
1219 * Local Variables:
1220 * eval: (c-set-style "gnu")
1221 * End:
1222 */