Line data Source code
1 : /*
2 : * Copyright (c) 2017-2019 Cisco and/or its affiliates.
3 : * Licensed under the Apache License, Version 2.0 (the "License");
4 : * you may not use this file except in compliance with the License.
5 : * You may obtain a copy of the License at:
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 : #include <vnet/vnet.h>
17 : #include <vlibmemory/api.h>
18 : #include <vnet/session/application.h>
19 : #include <vnet/session/application_interface.h>
20 : #include <vnet/session/session.h>
21 :
22 : #define ECHO_SERVER_DBG (0)
23 : #define DBG(_fmt, _args...) \
24 : if (ECHO_SERVER_DBG) \
25 : clib_warning (_fmt, ##_args)
26 :
27 : typedef struct
28 : {
29 : /*
30 : * Server app parameters
31 : */
32 : svm_msg_q_t **vpp_queue;
33 : svm_queue_t *vl_input_queue; /**< Sever's event queue */
34 :
35 : u32 app_index; /**< Server app index */
36 : u32 my_client_index; /**< API client handle */
37 : u32 node_index; /**< process node index for event scheduling */
38 :
39 : /*
40 : * Config params
41 : */
42 : u8 no_echo; /**< Don't echo traffic */
43 : u32 fifo_size; /**< Fifo size */
44 : u32 rcv_buffer_size; /**< Rcv buffer size */
45 : u32 prealloc_fifos; /**< Preallocate fifos */
46 : u32 private_segment_count; /**< Number of private segments */
47 : u64 private_segment_size; /**< Size of private segments */
48 : char *server_uri; /**< Server URI */
49 : u32 tls_engine; /**< TLS engine: mbedtls/openssl */
50 : u32 ckpair_index; /**< Cert and key for tls/quic */
51 : u8 is_dgram; /**< set if transport is dgram */
52 :
53 : /*
54 : * Test state
55 : */
56 : u8 **rx_buf; /**< Per-thread RX buffer */
57 : u64 byte_index;
58 : u32 **rx_retries;
59 : u8 transport_proto;
60 : u64 listener_handle; /**< Session handle of the root listener */
61 :
62 : vlib_main_t *vlib_main;
63 : } echo_server_main_t;
64 :
65 : echo_server_main_t echo_server_main;
66 :
67 : int
68 16 : quic_echo_server_qsession_accept_callback (session_t * s)
69 : {
70 : DBG ("QSession %u accept w/opaque %d", s->session_index, s->opaque);
71 16 : return 0;
72 : }
73 :
74 : int
75 32 : quic_echo_server_session_accept_callback (session_t * s)
76 : {
77 32 : echo_server_main_t *esm = &echo_server_main;
78 32 : if (s->listener_handle == esm->listener_handle)
79 16 : return quic_echo_server_qsession_accept_callback (s);
80 : DBG ("SSESSION %u accept w/opaque %d", s->session_index, s->opaque);
81 :
82 32 : esm->vpp_queue[s->thread_index] =
83 16 : session_main_get_vpp_event_queue (s->thread_index);
84 16 : s->session_state = SESSION_STATE_READY;
85 16 : esm->byte_index = 0;
86 16 : ASSERT (vec_len (esm->rx_retries) > s->thread_index);
87 16 : vec_validate (esm->rx_retries[s->thread_index], s->session_index);
88 16 : esm->rx_retries[s->thread_index][s->session_index] = 0;
89 16 : return 0;
90 : }
91 :
92 : int
93 102 : echo_server_session_accept_callback (session_t * s)
94 : {
95 102 : echo_server_main_t *esm = &echo_server_main;
96 204 : esm->vpp_queue[s->thread_index] =
97 102 : session_main_get_vpp_event_queue (s->thread_index);
98 102 : s->session_state = SESSION_STATE_READY;
99 102 : esm->byte_index = 0;
100 102 : ASSERT (vec_len (esm->rx_retries) > s->thread_index);
101 102 : vec_validate (esm->rx_retries[s->thread_index], s->session_index);
102 102 : esm->rx_retries[s->thread_index][s->session_index] = 0;
103 102 : return 0;
104 : }
105 :
106 : void
107 117 : echo_server_session_disconnect_callback (session_t * s)
108 : {
109 117 : echo_server_main_t *esm = &echo_server_main;
110 117 : vnet_disconnect_args_t _a = { 0 }, *a = &_a;
111 :
112 117 : a->handle = session_handle (s);
113 117 : a->app_index = esm->app_index;
114 117 : vnet_disconnect_session (a);
115 117 : }
116 :
117 : void
118 0 : echo_server_session_reset_callback (session_t * s)
119 : {
120 0 : echo_server_main_t *esm = &echo_server_main;
121 0 : vnet_disconnect_args_t _a = { 0 }, *a = &_a;
122 0 : clib_warning ("Reset session %U", format_session, s, 2);
123 0 : a->handle = session_handle (s);
124 0 : a->app_index = esm->app_index;
125 0 : vnet_disconnect_session (a);
126 0 : }
127 :
128 : int
129 0 : echo_server_session_connected_callback (u32 app_index, u32 api_context,
130 : session_t * s, session_error_t err)
131 : {
132 0 : clib_warning ("called...");
133 0 : return -1;
134 : }
135 :
136 : int
137 20 : echo_server_add_segment_callback (u32 client_index, u64 segment_handle)
138 : {
139 : /* New heaps may be added */
140 20 : return 0;
141 : }
142 :
143 : int
144 0 : echo_server_redirect_connect_callback (u32 client_index, void *mp)
145 : {
146 0 : clib_warning ("called...");
147 0 : return -1;
148 : }
149 :
150 : void
151 0 : test_bytes (echo_server_main_t * esm, int actual_transfer)
152 : {
153 : int i;
154 0 : u32 my_thread_id = vlib_get_thread_index ();
155 :
156 0 : for (i = 0; i < actual_transfer; i++)
157 : {
158 0 : if (esm->rx_buf[my_thread_id][i] != ((esm->byte_index + i) & 0xff))
159 : {
160 0 : clib_warning ("at %lld expected %d got %d", esm->byte_index + i,
161 : (esm->byte_index + i) & 0xff,
162 : esm->rx_buf[my_thread_id][i]);
163 : }
164 : }
165 0 : esm->byte_index += actual_transfer;
166 0 : }
167 :
168 : /*
169 : * If no-echo, just drop the data and be done with it.
170 : */
171 : int
172 7183 : echo_server_builtin_server_rx_callback_no_echo (session_t * s)
173 : {
174 7183 : svm_fifo_t *rx_fifo = s->rx_fifo;
175 7183 : svm_fifo_dequeue_drop (rx_fifo, svm_fifo_max_dequeue_cons (rx_fifo));
176 7183 : return 0;
177 : }
178 :
179 : int
180 36278 : echo_server_rx_callback (session_t * s)
181 : {
182 : u32 n_written, max_dequeue, max_enqueue, max_transfer;
183 : int actual_transfer;
184 : svm_fifo_t *tx_fifo, *rx_fifo;
185 36278 : echo_server_main_t *esm = &echo_server_main;
186 36278 : u32 thread_index = vlib_get_thread_index ();
187 : app_session_transport_t at;
188 :
189 36278 : ASSERT (s->thread_index == thread_index);
190 :
191 36278 : rx_fifo = s->rx_fifo;
192 36278 : tx_fifo = s->tx_fifo;
193 :
194 36278 : ASSERT (rx_fifo->master_thread_index == thread_index);
195 36278 : ASSERT (tx_fifo->master_thread_index == thread_index);
196 :
197 36278 : max_enqueue = svm_fifo_max_enqueue_prod (tx_fifo);
198 36278 : if (!esm->is_dgram)
199 : {
200 36278 : max_dequeue = svm_fifo_max_dequeue_cons (rx_fifo);
201 : }
202 : else
203 : {
204 : session_dgram_pre_hdr_t ph;
205 0 : svm_fifo_peek (rx_fifo, 0, sizeof (ph), (u8 *) & ph);
206 0 : max_dequeue = ph.data_length - ph.data_offset;
207 0 : if (!esm->vpp_queue[s->thread_index])
208 : {
209 : svm_msg_q_t *mq;
210 0 : mq = session_main_get_vpp_event_queue (s->thread_index);
211 0 : esm->vpp_queue[s->thread_index] = mq;
212 : }
213 0 : max_enqueue -= sizeof (session_dgram_hdr_t);
214 : }
215 :
216 36278 : if (PREDICT_FALSE (max_dequeue == 0))
217 170 : return 0;
218 :
219 : /* Number of bytes we're going to copy */
220 36108 : max_transfer = clib_min (max_dequeue, max_enqueue);
221 :
222 : /* No space in tx fifo */
223 36108 : if (PREDICT_FALSE (max_transfer == 0))
224 : {
225 : /* XXX timeout for session that are stuck */
226 :
227 10332 : rx_event:
228 : /* Program self-tap to retry */
229 18585 : if (svm_fifo_set_event (rx_fifo))
230 : {
231 9589 : if (session_send_io_evt_to_thread (rx_fifo,
232 : SESSION_IO_EVT_BUILTIN_RX))
233 0 : clib_warning ("failed to enqueue self-tap");
234 :
235 9589 : vec_validate (esm->rx_retries[s->thread_index], s->session_index);
236 9589 : if (esm->rx_retries[thread_index][s->session_index] == 500000)
237 : {
238 0 : clib_warning ("session stuck: %U", format_session, s, 2);
239 : }
240 9589 : if (esm->rx_retries[thread_index][s->session_index] < 500001)
241 9589 : esm->rx_retries[thread_index][s->session_index]++;
242 : }
243 :
244 18585 : return 0;
245 : }
246 :
247 25776 : vec_validate (esm->rx_buf[thread_index], max_transfer);
248 25776 : if (!esm->is_dgram)
249 : {
250 25776 : actual_transfer = app_recv_stream_raw (rx_fifo,
251 25776 : esm->rx_buf[thread_index],
252 : max_transfer,
253 : 0 /* don't clear event */ ,
254 : 0 /* peek */ );
255 : }
256 : else
257 : {
258 0 : actual_transfer = app_recv_dgram_raw (rx_fifo,
259 0 : esm->rx_buf[thread_index],
260 : max_transfer, &at,
261 : 0 /* don't clear event */ ,
262 : 0 /* peek */ );
263 : }
264 25776 : ASSERT (actual_transfer == max_transfer);
265 : /* test_bytes (esm, actual_transfer); */
266 :
267 : /*
268 : * Echo back
269 : */
270 :
271 25776 : if (!esm->is_dgram)
272 : {
273 25776 : n_written = app_send_stream_raw (tx_fifo,
274 25776 : esm->vpp_queue[thread_index],
275 25776 : esm->rx_buf[thread_index],
276 : actual_transfer, SESSION_IO_EVT_TX,
277 : 1 /* do_evt */ , 0);
278 : }
279 : else
280 : {
281 0 : n_written = app_send_dgram_raw (tx_fifo, &at,
282 : esm->vpp_queue[s->thread_index],
283 : esm->rx_buf[thread_index],
284 : actual_transfer, SESSION_IO_EVT_TX,
285 : 1 /* do_evt */ , 0);
286 : }
287 :
288 25776 : if (n_written != max_transfer)
289 0 : clib_warning ("short trout! written %u read %u", n_written, max_transfer);
290 :
291 25776 : if (PREDICT_FALSE (svm_fifo_max_dequeue_cons (rx_fifo)))
292 8253 : goto rx_event;
293 :
294 17523 : return 0;
295 : }
296 :
297 : static session_cb_vft_t echo_server_session_cb_vft = {
298 : .session_accept_callback = echo_server_session_accept_callback,
299 : .session_disconnect_callback = echo_server_session_disconnect_callback,
300 : .session_connected_callback = echo_server_session_connected_callback,
301 : .add_segment_callback = echo_server_add_segment_callback,
302 : .builtin_app_rx_callback = echo_server_rx_callback,
303 : .session_reset_callback = echo_server_session_reset_callback
304 : };
305 :
306 : static int
307 6 : echo_server_attach (u8 * appns_id, u64 appns_flags, u64 appns_secret)
308 : {
309 6 : vnet_app_add_cert_key_pair_args_t _ck_pair, *ck_pair = &_ck_pair;
310 6 : echo_server_main_t *esm = &echo_server_main;
311 6 : vnet_app_attach_args_t _a, *a = &_a;
312 : u64 options[APP_OPTIONS_N_OPTIONS];
313 :
314 6 : clib_memset (a, 0, sizeof (*a));
315 6 : clib_memset (options, 0, sizeof (options));
316 :
317 6 : if (esm->no_echo)
318 1 : echo_server_session_cb_vft.builtin_app_rx_callback =
319 : echo_server_builtin_server_rx_callback_no_echo;
320 : else
321 5 : echo_server_session_cb_vft.builtin_app_rx_callback =
322 : echo_server_rx_callback;
323 6 : if (esm->transport_proto == TRANSPORT_PROTO_QUIC)
324 3 : echo_server_session_cb_vft.session_accept_callback =
325 : quic_echo_server_session_accept_callback;
326 :
327 6 : a->api_client_index = ~0;
328 6 : a->name = format (0, "echo_server");
329 6 : a->session_cb_vft = &echo_server_session_cb_vft;
330 6 : a->options = options;
331 6 : a->options[APP_OPTIONS_SEGMENT_SIZE] = esm->private_segment_size;
332 6 : a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = esm->private_segment_size;
333 6 : a->options[APP_OPTIONS_RX_FIFO_SIZE] = esm->fifo_size;
334 6 : a->options[APP_OPTIONS_TX_FIFO_SIZE] = esm->fifo_size;
335 6 : a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = esm->private_segment_count;
336 6 : a->options[APP_OPTIONS_TLS_ENGINE] = esm->tls_engine;
337 6 : a->options[APP_OPTIONS_PCT_FIRST_ALLOC] = 100;
338 6 : a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] =
339 6 : esm->prealloc_fifos ? esm->prealloc_fifos : 1;
340 :
341 6 : a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
342 6 : if (appns_id)
343 : {
344 6 : a->namespace_id = appns_id;
345 6 : a->options[APP_OPTIONS_FLAGS] |= appns_flags;
346 6 : a->options[APP_OPTIONS_NAMESPACE_SECRET] = appns_secret;
347 : }
348 :
349 6 : if (vnet_application_attach (a))
350 : {
351 0 : clib_warning ("failed to attach server");
352 0 : return -1;
353 : }
354 6 : esm->app_index = a->app_index;
355 6 : vec_free (a->name);
356 :
357 6 : clib_memset (ck_pair, 0, sizeof (*ck_pair));
358 6 : ck_pair->cert = (u8 *) test_srv_crt_rsa;
359 6 : ck_pair->key = (u8 *) test_srv_key_rsa;
360 6 : ck_pair->cert_len = test_srv_crt_rsa_len;
361 6 : ck_pair->key_len = test_srv_key_rsa_len;
362 6 : vnet_app_add_cert_key_pair (ck_pair);
363 6 : esm->ckpair_index = ck_pair->index;
364 :
365 6 : return 0;
366 : }
367 :
368 : static int
369 0 : echo_server_detach (void)
370 : {
371 0 : echo_server_main_t *esm = &echo_server_main;
372 0 : vnet_app_detach_args_t _da, *da = &_da;
373 : int rv;
374 :
375 0 : da->app_index = esm->app_index;
376 0 : da->api_client_index = ~0;
377 0 : rv = vnet_application_detach (da);
378 0 : esm->app_index = ~0;
379 0 : vnet_app_del_cert_key_pair (esm->ckpair_index);
380 0 : return rv;
381 : }
382 :
383 : static int
384 6 : echo_client_transport_needs_crypto (transport_proto_t proto)
385 : {
386 6 : return proto == TRANSPORT_PROTO_TLS || proto == TRANSPORT_PROTO_DTLS ||
387 : proto == TRANSPORT_PROTO_QUIC;
388 : }
389 :
390 : static int
391 6 : echo_server_listen ()
392 : {
393 : i32 rv;
394 6 : echo_server_main_t *esm = &echo_server_main;
395 6 : vnet_listen_args_t _args = { 0 }, *args = &_args;
396 :
397 6 : args->sep_ext.app_wrk_index = 0;
398 :
399 6 : if ((rv = parse_uri (esm->server_uri, &args->sep_ext)))
400 : {
401 0 : return -1;
402 : }
403 6 : args->app_index = esm->app_index;
404 6 : if (echo_client_transport_needs_crypto (args->sep_ext.transport_proto))
405 : {
406 3 : session_endpoint_alloc_ext_cfg (&args->sep_ext,
407 : TRANSPORT_ENDPT_EXT_CFG_CRYPTO);
408 3 : args->sep_ext.ext_cfg->crypto.ckpair_index = esm->ckpair_index;
409 : }
410 :
411 6 : if (args->sep_ext.transport_proto == TRANSPORT_PROTO_UDP)
412 : {
413 1 : args->sep_ext.transport_flags = TRANSPORT_CFG_F_CONNECTED;
414 : }
415 :
416 6 : rv = vnet_listen (args);
417 6 : esm->listener_handle = args->handle;
418 6 : if (args->sep_ext.ext_cfg)
419 3 : clib_mem_free (args->sep_ext.ext_cfg);
420 6 : return rv;
421 : }
422 :
423 : static int
424 6 : echo_server_create (vlib_main_t * vm, u8 * appns_id, u64 appns_flags,
425 : u64 appns_secret)
426 : {
427 6 : echo_server_main_t *esm = &echo_server_main;
428 6 : vlib_thread_main_t *vtm = vlib_get_thread_main ();
429 : u32 num_threads;
430 : int i;
431 :
432 6 : num_threads = 1 /* main thread */ + vtm->n_threads;
433 6 : vec_validate (echo_server_main.vpp_queue, num_threads - 1);
434 6 : vec_validate (esm->rx_buf, num_threads - 1);
435 6 : vec_validate (esm->rx_retries, num_threads - 1);
436 12 : for (i = 0; i < vec_len (esm->rx_retries); i++)
437 6 : vec_validate (esm->rx_retries[i],
438 : pool_elts (session_main.wrk[i].sessions));
439 6 : esm->rcv_buffer_size = clib_max (esm->rcv_buffer_size, esm->fifo_size);
440 12 : for (i = 0; i < num_threads; i++)
441 6 : vec_validate (esm->rx_buf[i], esm->rcv_buffer_size);
442 :
443 6 : if (echo_server_attach (appns_id, appns_flags, appns_secret))
444 : {
445 0 : clib_warning ("failed to attach server");
446 0 : return -1;
447 : }
448 6 : if (echo_server_listen ())
449 : {
450 0 : clib_warning ("failed to start listening");
451 0 : if (echo_server_detach ())
452 0 : clib_warning ("failed to detach");
453 0 : return -1;
454 : }
455 6 : return 0;
456 : }
457 :
458 : static clib_error_t *
459 6 : echo_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
460 : vlib_cli_command_t * cmd)
461 : {
462 6 : session_endpoint_cfg_t sep = SESSION_ENDPOINT_CFG_NULL;
463 6 : echo_server_main_t *esm = &echo_server_main;
464 6 : u8 server_uri_set = 0, *appns_id = 0;
465 6 : u64 appns_flags = 0, appns_secret = 0;
466 6 : char *default_uri = "tcp://0.0.0.0/1234";
467 6 : int rv, is_stop = 0;
468 6 : clib_error_t *error = 0;
469 :
470 6 : esm->no_echo = 0;
471 6 : esm->fifo_size = 64 << 10;
472 6 : esm->rcv_buffer_size = 128 << 10;
473 6 : esm->prealloc_fifos = 0;
474 6 : esm->private_segment_count = 0;
475 6 : esm->private_segment_size = 512 << 20;
476 6 : esm->tls_engine = CRYPTO_ENGINE_OPENSSL;
477 6 : vec_free (esm->server_uri);
478 :
479 26 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
480 : {
481 20 : if (unformat (input, "uri %s", &esm->server_uri))
482 6 : server_uri_set = 1;
483 14 : else if (unformat (input, "no-echo"))
484 1 : esm->no_echo = 1;
485 13 : else if (unformat (input, "fifo-size %d", &esm->fifo_size))
486 6 : esm->fifo_size <<= 10;
487 7 : else if (unformat (input, "rcv-buf-size %d", &esm->rcv_buffer_size))
488 : ;
489 7 : else if (unformat (input, "prealloc-fifos %d", &esm->prealloc_fifos))
490 : ;
491 7 : else if (unformat (input, "private-segment-count %d",
492 : &esm->private_segment_count))
493 : ;
494 7 : else if (unformat (input, "private-segment-size %U",
495 : unformat_memory_size, &esm->private_segment_size))
496 : ;
497 6 : else if (unformat (input, "appns %_%v%_", &appns_id))
498 : ;
499 0 : else if (unformat (input, "all-scope"))
500 0 : appns_flags |= (APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE
501 : | APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE);
502 0 : else if (unformat (input, "local-scope"))
503 0 : appns_flags |= APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE;
504 0 : else if (unformat (input, "global-scope"))
505 0 : appns_flags |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
506 0 : else if (unformat (input, "secret %lu", &appns_secret))
507 : ;
508 0 : else if (unformat (input, "stop"))
509 0 : is_stop = 1;
510 0 : else if (unformat (input, "tls-engine %d", &esm->tls_engine))
511 : ;
512 : else
513 : {
514 0 : error = clib_error_return (0, "failed: unknown input `%U'",
515 : format_unformat_error, input);
516 0 : goto cleanup;
517 : }
518 : }
519 :
520 6 : if (is_stop)
521 : {
522 0 : if (esm->app_index == (u32) ~ 0)
523 : {
524 0 : clib_warning ("server not running");
525 0 : error = clib_error_return (0, "failed: server not running");
526 0 : goto cleanup;
527 : }
528 0 : rv = echo_server_detach ();
529 0 : if (rv)
530 : {
531 0 : clib_warning ("failed: detach");
532 0 : error = clib_error_return (0, "failed: server detach %d", rv);
533 0 : goto cleanup;
534 : }
535 0 : goto cleanup;
536 : }
537 :
538 6 : vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ );
539 :
540 6 : if (!server_uri_set)
541 : {
542 0 : clib_warning ("No uri provided! Using default: %s", default_uri);
543 0 : esm->server_uri = (char *) format (0, "%s%c", default_uri, 0);
544 : }
545 :
546 6 : if ((rv = parse_uri ((char *) esm->server_uri, &sep)))
547 : {
548 0 : error = clib_error_return (0, "Uri parse error: %d", rv);
549 0 : goto cleanup;
550 : }
551 6 : esm->transport_proto = sep.transport_proto;
552 6 : esm->is_dgram = (sep.transport_proto == TRANSPORT_PROTO_UDP);
553 :
554 6 : rv = echo_server_create (vm, appns_id, appns_flags, appns_secret);
555 6 : if (rv)
556 : {
557 0 : vec_free (esm->server_uri);
558 0 : error = clib_error_return (0, "failed: server_create returned %d", rv);
559 0 : goto cleanup;
560 : }
561 :
562 6 : cleanup:
563 6 : vec_free (appns_id);
564 :
565 6 : return error;
566 : }
567 :
568 : /* *INDENT-OFF* */
569 203447 : VLIB_CLI_COMMAND (echo_server_create_command, static) =
570 : {
571 : .path = "test echo server",
572 : .short_help = "test echo server proto <proto> [no echo][fifo-size <mbytes>]"
573 : "[rcv-buf-size <bytes>][prealloc-fifos <count>]"
574 : "[private-segment-count <count>][private-segment-size <bytes[m|g]>]"
575 : "[uri <tcp://ip/port>]",
576 : .function = echo_server_create_command_fn,
577 : };
578 : /* *INDENT-ON* */
579 :
580 : clib_error_t *
581 559 : echo_server_main_init (vlib_main_t * vm)
582 : {
583 559 : echo_server_main_t *esm = &echo_server_main;
584 559 : esm->my_client_index = ~0;
585 559 : return 0;
586 : }
587 :
588 1119 : VLIB_INIT_FUNCTION (echo_server_main_init);
589 :
590 : /*
591 : * fd.io coding-style-patch-verification: ON
592 : *
593 : * Local Variables:
594 : * eval: (c-set-style "gnu")
595 : * End:
596 : */
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