2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
21 #include <arpa/inet.h>
25 #include <vpp-api/vapi/vapi_dbg.h>
26 #include <vpp-api/vapi/vapi.h>
27 #include <vpp-api/vapi/vapi_internal.h>
28 #include <vppinfra/types.h>
29 #include <vlibapi/api_common.h>
30 #include <vlibmemory/api_common.h>
32 /* we need to use control pings for some stuff and because we're forced to put
33 * the code in headers, we need a way to be able to grab the ids of these
34 * messages - so declare them here as extern */
35 vapi_msg_id_t vapi_msg_id_control_ping = 0;
36 vapi_msg_id_t vapi_msg_id_control_ping_reply = 0;
41 vapi_message_desc_t **msgs;
42 size_t max_len_name_with_crc;
53 static const u32 context_counter_mask = (1 << 31);
57 vapi_error_e (*cb) (vapi_ctx_t ctx, void *callback_ctx, vapi_msg_id_t id,
60 } vapi_generic_cb_with_ctx;
64 vapi_error_e (*cb) (vapi_ctx_t ctx, void *callback_ctx, void *payload);
66 } vapi_event_cb_with_ctx;
71 int requests_size; /* size of the requests array (circular queue) */
72 int requests_start; /* index of first request */
73 int requests_count; /* number of used slots */
76 vapi_generic_cb_with_ctx generic_cb;
77 vapi_event_cb_with_ctx *event_cbs;
78 u16 *vapi_msg_id_t_to_vl_msg_id;
80 vapi_msg_id_t *vl_msg_id_to_vapi_msg_t;
82 pthread_mutex_t requests_mutex;
86 vapi_gen_req_context (vapi_ctx_t ctx)
88 ++ctx->context_counter;
89 ctx->context_counter %= context_counter_mask;
90 return ctx->context_counter | context_counter_mask;
94 vapi_get_request_count (vapi_ctx_t ctx)
96 return ctx->requests_count;
100 vapi_requests_full (vapi_ctx_t ctx)
102 return (ctx->requests_count == ctx->requests_size);
106 vapi_requests_empty (vapi_ctx_t ctx)
108 return (0 == ctx->requests_count);
112 vapi_requests_end (vapi_ctx_t ctx)
114 return (ctx->requests_start + ctx->requests_count) % ctx->requests_size;
118 vapi_store_request (vapi_ctx_t ctx, u32 context, bool is_dump,
119 vapi_cb_t callback, void *callback_ctx)
121 assert (!vapi_requests_full (ctx));
122 /* if the mutex is not held, bad things will happen */
123 assert (0 != pthread_mutex_trylock (&ctx->requests_mutex));
124 const int requests_end = vapi_requests_end (ctx);
125 vapi_req_t *slot = &ctx->requests[requests_end];
126 slot->is_dump = is_dump;
127 slot->context = context;
128 slot->callback = callback;
129 slot->callback_ctx = callback_ctx;
130 VAPI_DBG ("stored@%d: context:%x (start is @%d)", requests_end, context,
131 ctx->requests_start);
132 ++ctx->requests_count;
133 assert (!vapi_requests_empty (ctx));
137 struct to_be_freed_s;
141 struct to_be_freed_s *next;
144 static struct to_be_freed_s *to_be_freed = NULL;
147 vapi_add_to_be_freed (void *v)
149 struct to_be_freed_s *prev = NULL;
150 struct to_be_freed_s *tmp;
152 while (tmp && tmp->v)
161 tmp = to_be_freed = calloc (1, sizeof (*to_be_freed));
165 tmp = prev->next = calloc (1, sizeof (*to_be_freed));
168 VAPI_DBG ("To be freed %p", v);
173 vapi_trace_free (void *v)
175 struct to_be_freed_s *tmp = to_be_freed;
176 while (tmp && tmp->v != v)
180 if (tmp && tmp->v == v)
182 VAPI_DBG ("Freed %p", v);
187 VAPI_ERR ("Trying to free untracked pointer %p", v);
193 vapi_to_be_freed_validate ()
195 struct to_be_freed_s *tmp = to_be_freed;
200 VAPI_ERR ("Unfreed msg %p!", tmp->v);
209 vapi_msg_alloc (vapi_ctx_t ctx, size_t size)
215 void *rv = vl_msg_api_alloc_or_null (size);
220 vapi_msg_free (vapi_ctx_t ctx, void *msg)
227 vapi_trace_free (msg);
229 vl_msg_api_free (msg);
233 vapi_lookup_vapi_msg_id_t (vapi_ctx_t ctx, u16 vl_msg_id)
235 if (vl_msg_id <= ctx->vl_msg_id_max)
237 return ctx->vl_msg_id_to_vapi_msg_t[vl_msg_id];
243 vapi_ctx_alloc (vapi_ctx_t * result)
245 vapi_ctx_t ctx = calloc (1, sizeof (struct vapi_ctx_s));
250 ctx->context_counter = 0;
251 ctx->vapi_msg_id_t_to_vl_msg_id =
252 malloc (__vapi_metadata.count *
253 sizeof (*ctx->vapi_msg_id_t_to_vl_msg_id));
254 if (!ctx->vapi_msg_id_t_to_vl_msg_id)
258 ctx->event_cbs = calloc (__vapi_metadata.count, sizeof (*ctx->event_cbs));
263 pthread_mutex_init (&ctx->requests_mutex, NULL);
272 vapi_ctx_free (vapi_ctx_t ctx)
274 assert (!ctx->connected);
275 free (ctx->requests);
276 free (ctx->vapi_msg_id_t_to_vl_msg_id);
277 free (ctx->event_cbs);
278 free (ctx->vl_msg_id_to_vapi_msg_t);
279 pthread_mutex_destroy (&ctx->requests_mutex);
284 vapi_is_msg_available (vapi_ctx_t ctx, vapi_msg_id_t id)
286 return vapi_lookup_vl_msg_id (ctx, id) != UINT16_MAX;
290 vapi_connect (vapi_ctx_t ctx, const char *name,
291 const char *chroot_prefix,
292 int max_outstanding_requests,
293 int response_queue_size, vapi_mode_e mode)
295 if (response_queue_size <= 0 || max_outstanding_requests <= 0)
299 ctx->requests_size = max_outstanding_requests;
300 const size_t size = ctx->requests_size * sizeof (*ctx->requests);
301 void *tmp = realloc (ctx->requests, size);
307 memset (ctx->requests, 0, size);
308 /* coverity[MISSING_LOCK] - 177211 requests_mutex is not needed here */
309 ctx->requests_start = ctx->requests_count = 0;
312 VAPI_DBG ("set memory root path `%s'", chroot_prefix);
313 vl_set_memory_root_path ((char *) chroot_prefix);
315 static char api_map[] = "/vpe-api";
316 VAPI_DBG ("client api map `%s'", api_map);
317 if ((vl_client_api_map (api_map)) < 0)
319 return VAPI_EMAP_FAIL;
321 VAPI_DBG ("connect client `%s'", name);
322 if (vl_client_connect ((char *) name, 0, response_queue_size) < 0)
324 vl_client_api_unmap ();
325 return VAPI_ECON_FAIL;
327 #if VAPI_DEBUG_CONNECT
328 VAPI_DBG ("start probing messages");
332 for (i = 0; i < __vapi_metadata.count; ++i)
334 vapi_message_desc_t *m = __vapi_metadata.msgs[i];
335 u8 scratch[m->name_with_crc_len + 1];
336 memcpy (scratch, m->name_with_crc, m->name_with_crc_len + 1);
337 u32 id = vl_api_get_msg_index (scratch);
342 VAPI_ERR ("Returned vl_msg_id `%u' > UINT16MAX `%u'!", id,
347 if (id > ctx->vl_msg_id_max)
349 vapi_msg_id_t *tmp = realloc (ctx->vl_msg_id_to_vapi_msg_t,
351 (*ctx->vl_msg_id_to_vapi_msg_t) *
358 ctx->vl_msg_id_to_vapi_msg_t = tmp;
359 ctx->vl_msg_id_max = id;
361 ctx->vl_msg_id_to_vapi_msg_t[id] = m->id;
362 ctx->vapi_msg_id_t_to_vl_msg_id[m->id] = id;
363 #if VAPI_DEBUG_CONNECT
364 VAPI_DBG ("Message `%s' has vl_msg_id `%u'", m->name_with_crc,
370 ctx->vapi_msg_id_t_to_vl_msg_id[m->id] = UINT16_MAX;
371 VAPI_DBG ("Message `%s' not available", m->name_with_crc);
374 #if VAPI_DEBUG_CONNECT
375 VAPI_DBG ("finished probing messages");
377 if (!vapi_is_msg_available (ctx, vapi_msg_id_control_ping) ||
378 !vapi_is_msg_available (ctx, vapi_msg_id_control_ping_reply))
381 ("control ping or control ping reply not available, cannot connect");
382 rv = VAPI_EINCOMPATIBLE;
386 ctx->connected = true;
389 vl_client_disconnect ();
390 vl_client_api_unmap ();
395 vapi_disconnect (vapi_ctx_t ctx)
401 vl_client_disconnect ();
402 vl_client_api_unmap ();
404 vapi_to_be_freed_validate ();
406 ctx->connected = false;
411 vapi_get_fd (vapi_ctx_t ctx, int *fd)
417 vapi_send (vapi_ctx_t ctx, void *msg)
419 vapi_error_e rv = VAPI_OK;
420 if (!ctx || !msg || !ctx->connected)
426 unix_shared_memory_queue_t *q = api_main.shmem_hdr->vl_input_queue;
428 unsigned msgid = be16toh (*(u16 *) msg);
429 if (msgid <= ctx->vl_msg_id_max)
431 vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid];
432 if (id < __vapi_metadata.count)
434 VAPI_DBG ("send msg@%p:%u[%s]", msg, msgid,
435 __vapi_metadata.msgs[id]->name);
439 VAPI_DBG ("send msg@%p:%u[UNKNOWN]", msg, msgid);
444 VAPI_DBG ("send msg@%p:%u[UNKNOWN]", msg, msgid);
447 tmp = unix_shared_memory_queue_add (q, (u8 *) & msg,
448 VAPI_MODE_BLOCKING ==
455 VAPI_DBG ("vapi_send() rv = %d", rv);
460 vapi_send2 (vapi_ctx_t ctx, void *msg1, void *msg2)
462 vapi_error_e rv = VAPI_OK;
463 if (!ctx || !msg1 || !msg2 || !ctx->connected)
468 unix_shared_memory_queue_t *q = api_main.shmem_hdr->vl_input_queue;
470 unsigned msgid1 = be16toh (*(u16 *) msg1);
471 unsigned msgid2 = be16toh (*(u16 *) msg2);
472 const char *name1 = "UNKNOWN";
473 const char *name2 = "UNKNOWN";
474 if (msgid1 <= ctx->vl_msg_id_max)
476 vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid1];
477 if (id < __vapi_metadata.count)
479 name1 = __vapi_metadata.msgs[id]->name;
482 if (msgid2 <= ctx->vl_msg_id_max)
484 vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid2];
485 if (id < __vapi_metadata.count)
487 name2 = __vapi_metadata.msgs[id]->name;
490 VAPI_DBG ("send two: %u[%s], %u[%s]", msgid1, name1, msgid2, name2);
492 int tmp = unix_shared_memory_queue_add2 (q, (u8 *) & msg1, (u8 *) & msg2,
493 VAPI_MODE_BLOCKING ==
500 VAPI_DBG ("vapi_send() rv = %d", rv);
505 vapi_recv (vapi_ctx_t ctx, void **msg, size_t * msg_size)
507 if (!ctx || !ctx->connected || !msg || !msg_size)
511 vapi_error_e rv = VAPI_OK;
512 api_main_t *am = &api_main;
515 if (am->our_pid == 0)
520 unix_shared_memory_queue_t *q = am->vl_input_queue;
521 VAPI_DBG ("doing shm queue sub");
522 int tmp = unix_shared_memory_queue_sub (q, (u8 *) & data, 0);
526 vapi_add_to_be_freed ((void *) data);
529 (msgbuf_t *) ((u8 *) data - offsetof (msgbuf_t, data));
530 if (!msgbuf->data_len)
532 vapi_msg_free (ctx, (u8 *) data);
536 *msg_size = ntohl (msgbuf->data_len);
538 unsigned msgid = be16toh (*(u16 *) * msg);
539 if (msgid <= ctx->vl_msg_id_max)
541 vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[msgid];
542 if (id < __vapi_metadata.count)
544 VAPI_DBG ("recv msg@%p:%u[%s]", *msg, msgid,
545 __vapi_metadata.msgs[id]->name);
549 VAPI_DBG ("recv msg@%p:%u[UNKNOWN]", *msg, msgid);
554 VAPI_DBG ("recv msg@%p:%u[UNKNOWN]", *msg, msgid);
566 vapi_wait (vapi_ctx_t ctx, vapi_wait_mode_e mode)
572 vapi_dispatch_response (vapi_ctx_t ctx, vapi_msg_id_t id,
573 u32 context, void *msg)
576 if (0 != (mrv = pthread_mutex_lock (&ctx->requests_mutex)))
578 VAPI_DBG ("pthread_mutex_lock() failed, rv=%d:%s", mrv, strerror (mrv));
579 return VAPI_MUTEX_FAILURE;
581 int tmp = ctx->requests_start;
582 const int requests_end = vapi_requests_end (ctx);
583 while (ctx->requests[tmp].context != context && tmp != requests_end)
586 if (tmp == ctx->requests_size)
591 VAPI_DBG ("dispatch, search from %d, %s at %d", ctx->requests_start,
592 ctx->requests[tmp].context == context ? "matched" : "stopped",
594 vapi_error_e rv = VAPI_OK;
595 if (ctx->requests[tmp].context == context)
597 while (ctx->requests_start != tmp)
599 VAPI_ERR ("No response to req with context=%u",
600 (unsigned) ctx->requests[tmp].context);
601 ctx->requests[ctx->requests_start].callback (ctx,
604 requests_start].callback_ctx,
607 memset (&ctx->requests[ctx->requests_start], 0,
608 sizeof (ctx->requests[ctx->requests_start]));
609 ++ctx->requests_start;
610 --ctx->requests_count;
611 if (ctx->requests_start == ctx->requests_size)
613 ctx->requests_start = 0;
616 // now ctx->requests_start == tmp
617 int payload_offset = vapi_get_payload_offset (id);
618 void *payload = ((u8 *) msg) + payload_offset;
620 if (ctx->requests[tmp].is_dump)
622 if (vapi_msg_id_control_ping_reply == id)
631 if (payload_offset != -1)
634 ctx->requests[tmp].callback (ctx, ctx->requests[tmp].callback_ctx,
635 VAPI_OK, is_last, payload);
639 /* this is a message without payload, so bend the callback a little
642 ((vapi_error_e (*)(vapi_ctx_t, void *, vapi_error_e, bool))
643 ctx->requests[tmp].callback) (ctx,
644 ctx->requests[tmp].callback_ctx,
649 memset (&ctx->requests[ctx->requests_start], 0,
650 sizeof (ctx->requests[ctx->requests_start]));
651 ++ctx->requests_start;
652 --ctx->requests_count;
653 if (ctx->requests_start == ctx->requests_size)
655 ctx->requests_start = 0;
658 VAPI_DBG ("after dispatch, req start = %d, end = %d, count = %d",
659 ctx->requests_start, requests_end, ctx->requests_count);
661 if (0 != (mrv = pthread_mutex_unlock (&ctx->requests_mutex)))
663 VAPI_DBG ("pthread_mutex_unlock() failed, rv=%d:%s", mrv,
665 abort (); /* this really shouldn't happen */
671 vapi_dispatch_event (vapi_ctx_t ctx, vapi_msg_id_t id, void *msg)
673 if (ctx->event_cbs[id].cb)
675 return ctx->event_cbs[id].cb (ctx, ctx->event_cbs[id].ctx, msg);
677 else if (ctx->generic_cb.cb)
679 return ctx->generic_cb.cb (ctx, ctx->generic_cb.ctx, id, msg);
684 ("No handler/generic handler for msg id %u[%s], message ignored",
685 (unsigned) id, __vapi_metadata.msgs[id]->name);
691 vapi_msg_is_with_context (vapi_msg_id_t id)
693 assert (id <= __vapi_metadata.count);
694 return __vapi_metadata.msgs[id]->has_context;
698 vapi_dispatch_one (vapi_ctx_t ctx)
700 VAPI_DBG ("vapi_dispatch_one()");
703 vapi_error_e rv = vapi_recv (ctx, &msg, &size);
706 VAPI_DBG ("vapi_recv failed with rv=%d", rv);
709 u16 vpp_id = be16toh (*(u16 *) msg);
710 if (vpp_id > ctx->vl_msg_id_max)
712 VAPI_ERR ("Unknown msg ID received, id `%u', out of range <0,%u>",
713 (unsigned) vpp_id, (unsigned) ctx->vl_msg_id_max);
714 vapi_msg_free (ctx, msg);
717 if (~0 == (unsigned) ctx->vl_msg_id_to_vapi_msg_t[vpp_id])
719 VAPI_ERR ("Unknown msg ID received, id `%u' marked as not supported",
721 vapi_msg_free (ctx, msg);
724 const vapi_msg_id_t id = ctx->vl_msg_id_to_vapi_msg_t[vpp_id];
725 const size_t expect_size = vapi_get_message_size (id);
726 if (size < expect_size)
729 ("Invalid msg received, unexpected size `%zu' < expected min `%zu'",
731 vapi_msg_free (ctx, msg);
735 vapi_get_swap_to_host_func (id) (msg);
736 if (vapi_msg_is_with_context (id))
738 context = *(u32 *) (((u8 *) msg) + vapi_get_context_offset (id));
739 /* is this a message originating from VAPI? */
740 VAPI_DBG ("dispatch, context is %x", context);
741 if (context & context_counter_mask)
743 rv = vapi_dispatch_response (ctx, id, context, msg);
747 rv = vapi_dispatch_event (ctx, id, msg);
750 vapi_msg_free (ctx, msg);
755 vapi_dispatch (vapi_ctx_t ctx)
757 vapi_error_e rv = VAPI_OK;
758 while (!vapi_requests_empty (ctx))
760 rv = vapi_dispatch_one (ctx);
770 vapi_set_event_cb (vapi_ctx_t ctx, vapi_msg_id_t id,
771 vapi_event_cb callback, void *callback_ctx)
773 vapi_event_cb_with_ctx *c = &ctx->event_cbs[id];
775 c->ctx = callback_ctx;
779 vapi_clear_event_cb (vapi_ctx_t ctx, vapi_msg_id_t id)
781 vapi_set_event_cb (ctx, id, NULL, NULL);
785 vapi_set_generic_event_cb (vapi_ctx_t ctx, vapi_generic_event_cb callback,
788 ctx->generic_cb.cb = callback;
789 ctx->generic_cb.ctx = callback_ctx;
793 vapi_clear_generic_event_cb (vapi_ctx_t ctx)
795 ctx->generic_cb.cb = NULL;
796 ctx->generic_cb.ctx = NULL;
800 vapi_lookup_vl_msg_id (vapi_ctx_t ctx, vapi_msg_id_t id)
802 assert (id < __vapi_metadata.count);
803 return ctx->vapi_msg_id_t_to_vl_msg_id[id];
807 vapi_get_client_index (vapi_ctx_t ctx)
809 return api_main.my_client_index;
813 vapi_is_nonblocking (vapi_ctx_t ctx)
815 return (VAPI_MODE_NONBLOCKING == ctx->mode);
819 vapi_get_max_request_count (vapi_ctx_t ctx)
821 return ctx->requests_size - 1;
825 vapi_get_payload_offset (vapi_msg_id_t id)
827 assert (id < __vapi_metadata.count);
828 return __vapi_metadata.msgs[id]->payload_offset;
831 void (*vapi_get_swap_to_host_func (vapi_msg_id_t id)) (void *msg)
833 assert (id < __vapi_metadata.count);
834 return __vapi_metadata.msgs[id]->swap_to_host;
837 void (*vapi_get_swap_to_be_func (vapi_msg_id_t id)) (void *msg)
839 assert (id < __vapi_metadata.count);
840 return __vapi_metadata.msgs[id]->swap_to_be;
844 vapi_get_message_size (vapi_msg_id_t id)
846 assert (id < __vapi_metadata.count);
847 return __vapi_metadata.msgs[id]->size;
851 vapi_get_context_offset (vapi_msg_id_t id)
853 assert (id < __vapi_metadata.count);
854 return __vapi_metadata.msgs[id]->context_offset;
858 vapi_register_msg (vapi_message_desc_t * msg)
861 for (i = 0; i < __vapi_metadata.count; ++i)
864 (msg->name_with_crc, __vapi_metadata.msgs[i]->name_with_crc))
866 /* this happens if somebody is linking together several objects while
867 * using the static inline headers, just fill in the already
868 * assigned id here so that all the objects are in sync */
869 msg->id = __vapi_metadata.msgs[i]->id;
873 vapi_msg_id_t id = __vapi_metadata.count;
874 ++__vapi_metadata.count;
875 __vapi_metadata.msgs =
876 realloc (__vapi_metadata.msgs,
877 sizeof (*__vapi_metadata.msgs) * __vapi_metadata.count);
878 __vapi_metadata.msgs[id] = msg;
879 size_t s = strlen (msg->name_with_crc);
880 if (s > __vapi_metadata.max_len_name_with_crc)
882 __vapi_metadata.max_len_name_with_crc = s;
889 vapi_producer_lock (vapi_ctx_t ctx)
892 if (0 != (mrv = pthread_mutex_lock (&ctx->requests_mutex)))
894 VAPI_DBG ("pthread_mutex_lock() failed, rv=%d:%s", mrv, strerror (mrv));
895 (void) mrv; /* avoid warning if the above debug is not enabled */
896 return VAPI_MUTEX_FAILURE;
902 vapi_producer_unlock (vapi_ctx_t ctx)
905 if (0 != (mrv = pthread_mutex_unlock (&ctx->requests_mutex)))
907 VAPI_DBG ("pthread_mutex_unlock() failed, rv=%d:%s", mrv,
909 (void) mrv; /* avoid warning if the above debug is not enabled */
910 return VAPI_MUTEX_FAILURE;
916 vapi_get_message_count ()
918 return __vapi_metadata.count;
922 vapi_get_msg_name (vapi_msg_id_t id)
924 return __vapi_metadata.msgs[id]->name;
928 * fd.io coding-style-patch-verification: ON
931 * eval: (c-set-style "gnu")