/* *------------------------------------------------------------------ * api_shared.c - API message handling, common code for both clients * and the vlib process itself. * * * Copyright (c) 2009 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------ */ #include <stdio.h> #include <stdlib.h> #include <stddef.h> #include <string.h> #include <vppinfra/format.h> #include <vppinfra/byte_order.h> #include <vppinfra/error.h> #include <vlib/vlib.h> #include <vlib/unix/unix.h> #include <vlibapi/api.h> #include <vppinfra/elog.h> #include <vppinfra/callback.h> /* *INDENT-OFF* */ static api_main_t api_global_main = { .region_name = "/unset", .api_uid = -1, .api_gid = -1, }; /* *INDENT-ON* */ /* Please use vlibapi_get_main() to access my_api_main */ __thread api_main_t *my_api_main = &api_global_main; void vl_msg_api_set_global_main (void *am_arg) { ASSERT (am_arg); my_api_main = (api_main_t *) am_arg; } void vl_msg_api_increment_missing_client_counter (void) { api_main_t *am = vlibapi_get_main (); am->missing_clients++; } int vl_msg_api_rx_trace_enabled (api_main_t * am) { return (am->rx_trace && am->rx_trace->enabled); } int vl_msg_api_tx_trace_enabled (api_main_t * am) { return (am->tx_trace && am->tx_trace->enabled); } /* * vl_msg_api_trace */ void vl_msg_api_trace (api_main_t * am, vl_api_trace_t * tp, void *msg) { u8 **this_trace; u8 **old_trace; u8 *msg_copy; u32 length; u16 msg_id = clib_net_to_host_u16 (*((u16 *) msg)); vl_api_msg_data_t *m = vl_api_get_msg_data (am, msg_id); msgbuf_t *header = (msgbuf_t *) (((u8 *) msg) - offsetof (msgbuf_t, data)); if (!m || !m->trace_enable) return; msg_copy = 0; if (tp->nitems == 0) { clib_warning ("tp->nitems is 0"); return; } if (vec_len (tp->traces) < tp->nitems) { vec_add1 (tp->traces, 0); this_trace = tp->traces + vec_len (tp->traces) - 1; } else { tp->wrapped = 1; old_trace = tp->traces + tp->curindex++; if (tp->curindex == tp->nitems) tp->curindex = 0; /* Reuse the trace record, may save some memory allocator traffic */ msg_copy = *old_trace; vec_reset_length (msg_copy); this_trace = old_trace; } length = clib_net_to_host_u32 (header->data_len); vec_validate (msg_copy, length - 1); clib_memcpy_fast (msg_copy, msg, length); *this_trace = msg_copy; } int vl_msg_api_trace_onoff (api_main_t * am, vl_api_trace_which_t which, int onoff) { vl_api_trace_t *tp; int rv; switch (which) { case VL_API_TRACE_TX: tp = am->tx_trace; if (tp == 0) { vl_msg_api_trace_configure (am, which, 1024); tp = am->tx_trace; } break; case VL_API_TRACE_RX: tp = am->rx_trace; if (tp == 0) { vl_msg_api_trace_configure (am, which, 1024); tp = am->rx_trace; } break; default: /* duh? */ return -1; } /* Configured? */ if (tp == 0 || tp->nitems == 0) return -1; rv = tp->enabled; tp->enabled = onoff; return rv; } int vl_msg_api_trace_free (api_main_t * am, vl_api_trace_which_t which) { vl_api_trace_t *tp; int i; switch (which) { case VL_API_TRACE_TX: tp = am->tx_trace; break; case VL_API_TRACE_RX: tp = am->rx_trace; break; default: /* duh? */ return -1; } /* Configured? */ if (!tp || tp->nitems == 0) return -1; tp->curindex = 0; tp->wrapped = 0; for (i = 0; i < vec_len (tp->traces); i++) { vec_free (tp->traces[i]); } vec_free (tp->traces); return 0; } u8 * vl_api_serialize_message_table (api_main_t * am, u8 * vector) { serialize_main_t _sm, *sm = &_sm; hash_pair_t *hp; u32 nmsg = hash_elts (am->msg_index_by_name_and_crc); serialize_open_vector (sm, vector); /* serialize the count */ serialize_integer (sm, nmsg, sizeof (u32)); /* *INDENT-OFF* */ hash_foreach_pair (hp, am->msg_index_by_name_and_crc, ({ serialize_likely_small_unsigned_integer (sm, hp->value[0]); serialize_cstring (sm, (char *) hp->key); })); /* *INDENT-ON* */ return serialize_close_vector (sm); } static int vl_msg_api_trace_write_one (api_main_t *am, u8 *msg, FILE *fp) { u8 *tmpmem = 0; int tlen, slen; u32 msg_length = vec_len (msg); vec_validate (tmpmem, msg_length - 1); clib_memcpy_fast (tmpmem, msg, msg_length); u16 id = clib_net_to_host_u16 (*((u16 *) msg)); vl_api_msg_data_t *m = vl_api_get_msg_data (am, id); if (m && m->endian_handler) { m->endian_handler (tmpmem); } if (m && m->tojson_handler) { cJSON *o = m->tojson_handler (tmpmem); char *s = cJSON_Print (o); slen = strlen (s); tlen = fwrite (s, 1, slen, fp); cJSON_free (s); cJSON_Delete (o); vec_free (tmpmem); if (tlen != slen) { fformat (stderr, "writing to file error\n"); return -11; } } else fformat (stderr, " [no registered tojson fn]\n"); return 0; } #define vl_msg_fwrite(_s, _f) fwrite (_s, 1, sizeof (_s) - 1, _f) typedef struct { FILE *fp; u32 n_traces; u32 i; } vl_msg_write_json_args_t; static int vl_msg_write_json_fn (u8 *msg, void *ctx) { vl_msg_write_json_args_t *arg = ctx; FILE *fp = arg->fp; api_main_t *am = vlibapi_get_main (); int rc = vl_msg_api_trace_write_one (am, msg, fp); if (rc < 0) return rc; if (arg->i < arg->n_traces - 1) vl_msg_fwrite (",\n", fp); arg->i++; return 0; } static int vl_msg_api_trace_write_json (api_main_t *am, vl_api_trace_t *tp, FILE *fp) { vl_msg_write_json_args_t args; clib_memset (&args, 0, sizeof (args)); args.fp = fp; args.n_traces = vec_len (tp->traces); vl_msg_fwrite ("[\n", fp); int rv = vl_msg_traverse_trace (tp, vl_msg_write_json_fn, &args); if (rv < 0) return rv; vl_msg_fwrite ("]", fp); return 0; } int vl_msg_traverse_trace (vl_api_trace_t *tp, vl_msg_traverse_trace_fn fn, void *ctx) { int i; u8 *msg; int rv = 0; /* No-wrap case */ if (tp->wrapped == 0) { for (i = 0; i < vec_len (tp->traces); i++) { /*sa_ignore NO_NULL_CHK */ msg = tp->traces[i]; if (!msg) continue; rv = fn (msg, ctx); if (rv < 0) return rv; } } else { /* Wrap case: write oldest -> end of buffer */ for (i = tp->curindex; i < vec_len (tp->traces); i++) { msg = tp->traces[i]; if (!msg) continue; rv = fn (msg, ctx); if (rv < 0) return rv; } /* write beginning of buffer -> oldest-1 */ for (i = 0; i < tp->curindex; i++) { /*sa_ignore NO_NULL_CHK */ msg = tp->traces[i]; if (!msg) continue; rv = fn (msg, ctx); if (rv < 0) return rv; } } return 0; } static int vl_api_msg_write_fn (u8 *msg, void *ctx) { FILE *fp = ctx; u32 msg_length = clib_host_to_net_u32 (vec_len (msg)); if (fwrite (&msg_length, 1, sizeof (msg_length), fp) != sizeof (msg_length)) { return (-14); } if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg)) { return (-14); } return 0; } int vl_msg_api_trace_save (api_main_t *am, vl_api_trace_which_t which, FILE *fp, u8 is_json) { vl_api_trace_t *tp; vl_api_trace_file_header_t fh; switch (which) { case VL_API_TRACE_TX: tp = am->tx_trace; break; case VL_API_TRACE_RX: tp = am->rx_trace; break; default: /* duh? */ return -1; } /* Configured, data present? */ if (tp == 0 || tp->nitems == 0 || vec_len (tp->traces) == 0) return -1; /* "Dare to be stupid" check */ if (fp == 0) { return -2; } if (is_json) return vl_msg_api_trace_write_json (am, tp, fp); /* Write the file header */ fh.wrapped = tp->wrapped; fh.nitems = clib_host_to_net_u32 (vec_len (tp->traces)); u8 *m = vl_api_serialize_message_table (am, 0); fh.msgtbl_size = clib_host_to_net_u32 (vec_len (m)); if (fwrite (&fh, sizeof (fh), 1, fp) != 1) { return (-10); } /* Write the message table */ if (fwrite (m, vec_len (m), 1, fp) != 1) { return (-14); } vec_free (m); return vl_msg_traverse_trace (tp, vl_api_msg_write_fn, fp); } int vl_msg_api_trace_configure (api_main_t * am, vl_api_trace_which_t which, u32 nitems) { vl_api_trace_t *tp; int was_on = 0; switch (which) { case VL_API_TRACE_TX: tp = am->tx_trace; if (tp == 0) { vec_validate (am->tx_trace, 0); tp = am->tx_trace; } break; case VL_API_TRACE_RX: tp = am->rx_trace; if (tp == 0) { vec_validate (am->rx_trace, 0); tp = am->rx_trace; } break; default: return -1; } if (tp->enabled) { was_on = vl_msg_api_trace_onoff (am, which, 0); } if (tp->traces) { vl_msg_api_trace_free (am, which); } clib_memset (tp, 0, sizeof (*tp)); if (clib_arch_is_big_endian) { tp->endian = VL_API_BIG_ENDIAN; } else { tp->endian = VL_API_LITTLE_ENDIAN; } tp->nitems = nitems; if (was_on) { (void) vl_msg_api_trace_onoff (am, which, was_on); } return 0; } void vl_msg_api_barrier_sync (void) { } void vl_msg_api_barrier_release (void) { } always_inline void msg_handler_internal (api_main_t *am, void *the_msg, uword msg_len, int trace_it, int do_it, int free_it) { u16 id = clib_net_to_host_u16 (*((u16 *) the_msg)); vl_api_msg_data_t *m = vl_api_get_msg_data (am, id); if (PREDICT_FALSE (am->elog_trace_api_messages)) { /* *INDENT-OFF* */ ELOG_TYPE_DECLARE (e) = { .format = "api-msg: %s", .format_args = "T4", }; /* *INDENT-ON* */ struct { u32 c; } *ed; ed = ELOG_DATA (am->elog_main, e); if (m && m->name) ed->c = elog_string (am->elog_main, (char *) m->name); else ed->c = elog_string (am->elog_main, "BOGUS"); } if (m && m->handler) { if (trace_it) vl_msg_api_trace (am, am->rx_trace, the_msg); if (am->msg_print_flag) { fformat (stdout, "[%d]: %s\n", id, m->name); if (m->print_handler) m->print_handler (the_msg, stdout); else fformat (stdout, " [no registered print fn]\n"); } uword calc_size = 0; ASSERT (NULL != m->calc_size_func); if (m->calc_size_func) { calc_size = m->calc_size_func (the_msg); if (calc_size > msg_len) { clib_warning ( "Truncated message '%s' (id %u) received, calculated size " "%lu is bigger than actual size %llu, message dropped.", m->name, id, calc_size, msg_len); } } else { clib_warning ("Message '%s' (id %u) has NULL calc_size_func, cannot " "verify message size is correct", m->name, id); } /* don't process message if it's truncated, otherwise byte swaps * and stuff could corrupt memory even beyond message if it's malicious * e.g. VLA length field set to 1M elements, but VLA empty */ if (do_it && calc_size <= msg_len) { if (!m->is_mp_safe) { vl_msg_api_barrier_trace_context (am->msg_names[id]); vl_msg_api_barrier_sync (); } if (m->is_autoendian) m->endian_handler (the_msg); if (PREDICT_FALSE (vec_len (am->perf_counter_cbs) != 0)) clib_call_callbacks (am->perf_counter_cbs, am, id, 0 /* before */ ); m->handler (the_msg); if (PREDICT_FALSE (vec_len (am->perf_counter_cbs) != 0)) clib_call_callbacks (am->perf_counter_cbs, am, id, 1 /* after */ ); if (!m->is_mp_safe) vl_msg_api_barrier_release (); } } else { clib_warning ("no handler for msg id %d", id); } if (free_it) vl_msg_api_free (the_msg); if (PREDICT_FALSE (am->elog_trace_api_messages)) { /* *INDENT-OFF* */ ELOG_TYPE_DECLARE (e) = { .format = "api-msg-done(%s): %s", .format_args = "t4T4", .n_enum_strings = 2, .enum_strings = { "barrier", "mp-safe", } }; /* *INDENT-ON* */ struct { u32 barrier; u32 c; } *ed; ed = ELOG_DATA (am->elog_main, e); if (m && m->name) { ed->c = elog_string (am->elog_main, (char *) m->name); ed->barrier = !m->is_mp_safe; } else { ed->c = elog_string (am->elog_main, "BOGUS"); ed->barrier = 0; } } } void vl_msg_api_handler (void *the_msg, uword msg_len) { api_main_t *am = vlibapi_get_main (); msg_handler_internal (am, the_msg, msg_len, (am->rx_trace && am->rx_trace->enabled) /* trace_it */, 1 /* do_it */, 1 /* free_it */); } void vl_msg_api_handler_no_free (void *the_msg, uword msg_len) { api_main_t *am = vlibapi_get_main (); msg_handler_internal (am, the_msg, msg_len, (am->rx_trace && am->rx_trace->enabled) /* trace_it */, 1 /* do_it */, 0 /* free_it */); } void vl_msg_api_handler_no_trace_no_free (void *the_msg, uword msg_len) { api_main_t *am = vlibapi_get_main (); msg_handler_internal (am, the_msg, msg_len, 0 /* trace_it */, 1 /* do_it */, 0 /* free_it */); } /* * Add a trace record to the API message trace buffer, if * API message tracing is enabled. Handy for adding sufficient * data to the trace to reproduce autonomous state, as opposed to * state downloaded via control-plane API messages. Example: the NAT * application creates database entries based on packet traffic, not * control-plane messages. * */ void vl_msg_api_trace_only (void *the_msg, uword msg_len) { api_main_t *am = vlibapi_get_main (); msg_handler_internal (am, the_msg, msg_len, (am->rx_trace && am->rx_trace->enabled) /* trace_it */, 0 /* do_it */, 0 /* free_it */); } void vl_msg_api_cleanup_handler (void *the_msg) { api_main_t *am = vlibapi_get_main (); u16 id = clib_net_to_host_u16 (*((u16 *) the_msg)); vl_api_msg_data_t *m = vl_api_get_msg_data (am, id); if (PREDICT_FALSE (!m)) { clib_warning ("_vl_msg_id too large: %d\n", id); return; } if (m->cleanup_handler) m->cleanup_handler (the_msg); vl_msg_api_free (the_msg); } /* * vl_msg_api_replay_handler */ void vl_msg_api_replay_handler (void *the_msg) { api_main_t *am = vlibapi_get_main (); u16 id = clib_net_to_host_u16 (*((u16 *) the_msg)); vl_api_msg_data_t *m = vl_api_get_msg_data (am, id); if (PREDICT_FALSE (!m)) { clib_warning ("_vl_msg_id too large: %d\n", id); return; } /* do NOT trace the message... */ if (m->handler) m->handler (the_msg); /* do NOT free the message buffer... */ } u32 vl_msg_api_get_msg_length (void *msg_arg) { return vl_msg_api_get_msg_length_inline (msg_arg); } /* * vl_msg_api_socket_handler */ void vl_msg_api_socket_handler (void *the_msg, uword msg_len) { api_main_t *am = vlibapi_get_main (); msg_handler_internal (am, the_msg, msg_len, (am->rx_trace && am->rx_trace->enabled) /* trace_it */, 1 /* do_it */, 0 /* free_it */); } void vl_msg_api_config (vl_msg_api_msg_config_t * c) { api_main_t *am = vlibapi_get_main (); vl_api_msg_data_t *m; /* * This happens during the java core tests if the message * dictionary is missing newly added xxx_reply_t messages. * Should never happen, but since I shot myself in the foot once * this way, I thought I'd make it easy to debug if I ever do * it again... (;-)... */ if (c->id == 0) { if (c->name) clib_warning ("Trying to register %s with a NULL msg id!", c->name); else clib_warning ("Trying to register a NULL msg with a NULL msg id!"); clib_warning ("Did you forget to call setup_message_id_table?"); return; } vec_validate (am->msg_data, c->id); m = vl_api_get_msg_data (am, c->id); if (m->handler && m->handler != c->handler) clib_warning ("BUG: re-registering 'vl_api_%s_t_handler'." "Handler was %llx, replaced by %llx", c->name, m->handler, c->handler); m->name = c->name; m->handler = c->handler; m->cleanup_handler = c->cleanup; m->endian_handler = c->endian; m->print_handler = c->print; m->print_json_handler = c->print_json; m->tojson_handler = c->tojson; m->fromjson_handler = c->fromjson; m->calc_size_func = c->calc_size; m->bounce = c->message_bounce; m->is_mp_safe = c->is_mp_safe; m->is_autoendian = c->is_autoendian; m->trace_size = c->size; m->trace_enable = c->traced; m->replay_allowed = c->replay; if (!am->msg_id_by_name) am->msg_id_by_name = hash_create_string (0, sizeof (uword)); hash_set_mem (am->msg_id_by_name, c->name, c->id); } /* * vl_msg_api_set_handlers * preserve the old API for a while */ void vl_msg_api_set_handlers (int id, char *name, void *handler, void *cleanup, void *endian, void *print, int size, int traced, void *print_json, void *tojson, void *fromjson, void *calc_size) { vl_msg_api_msg_config_t cfg; vl_msg_api_msg_config_t *c = &cfg; clib_memset (c, 0, sizeof (*c)); c->id = id; c->name = name; c->handler = handler; c->cleanup = cleanup; c->endian = endian; c->print = print; c->traced = traced; c->replay = 1; c->message_bounce = 0; c->is_mp_safe = 0; c->is_autoendian = 0; c->tojson = tojson; c->fromjson = fromjson; c->print_json = print_json; c->calc_size = calc_size; vl_msg_api_config (c); } void vl_msg_api_clean_handlers (int msg_id) { vl_msg_api_msg_config_t cfg; vl_msg_api_msg_config_t *c = &cfg; clib_memset (c, 0, sizeof (*c)); c->id = msg_id; vl_msg_api_config (c); } void vl_msg_api_set_cleanup_handler (int msg_id, void *fp) { api_main_t *am = vlibapi_get_main (); vl_api_msg_data_t *m = vl_api_get_msg_data (am, msg_id); ASSERT (msg_id > 0); m->cleanup_handler = fp; } void vl_msg_api_queue_handler (svm_queue_t * q) { uword msg; while (!svm_queue_sub (q, (u8 *) &msg, SVM_Q_WAIT, 0)) { msgbuf_t *msgbuf = (msgbuf_t *) ((u8 *) msg - offsetof (msgbuf_t, data)); vl_msg_api_handler ((void *) msg, ntohl (msgbuf->data_len)); } } u32 vl_msg_api_max_length (void *mp) { msgbuf_t *mb; u32 data_len = ~0; /* Work out the maximum sane message length, and return it */ if (PREDICT_TRUE (mp != 0)) { mb = (msgbuf_t *) (((u8 *) mp) - offsetof (msgbuf_t, data)); data_len = clib_net_to_host_u32 (mb->data_len); } return data_len; } vl_api_trace_t * vl_msg_api_trace_get (api_main_t * am, vl_api_trace_which_t which) { switch (which) { case VL_API_TRACE_RX: return am->rx_trace; case VL_API_TRACE_TX: return am->tx_trace; default: return 0; } } void vl_noop_handler (void *mp) { } static u8 post_mortem_dump_enabled; void vl_msg_api_post_mortem_dump_enable_disable (int enable) { post_mortem_dump_enabled = enable; } void vl_msg_api_post_mortem_dump (void) { api_main_t *am = vlibapi_get_main (); FILE *fp; char filename[64]; int rv; if (post_mortem_dump_enabled == 0) return; snprintf (filename, sizeof (filename), "/tmp/api_post_mortem.%d", getpid ()); fp = fopen (filename, "w"); if (fp == NULL) { rv = write (2, "Couldn't create ", 16); rv = write (2, filename, strlen (filename)); rv = write (2, "\n", 1); return; } rv = vl_msg_api_trace_save (am, VL_API_TRACE_RX, fp, 0); fclose (fp); if (rv < 0) { rv = write (2, "Failed to save post-mortem API trace to ", 40); rv = write (2, filename, strlen (filename)); rv = write (2, "\n", 1); } } /* Layered message handling support */ void vl_msg_api_set_first_available_msg_id (u16 first_avail) { api_main_t *am = vlibapi_get_main (); am->first_available_msg_id = first_avail; } u16 vl_msg_api_get_msg_ids (const char *name, int n) { api_main_t *am = vlibapi_get_main (); u8 *name_copy; vl_api_msg_range_t *rp; uword *p; u16 rv; if (am->msg_range_by_name == 0) am->msg_range_by_name = hash_create_string (0, sizeof (uword)); name_copy = format (0, "%s%c", name, 0); p = hash_get_mem (am->msg_range_by_name, name_copy); if (p) { clib_warning ("WARNING: duplicate message range registration for '%s'", name_copy); vec_free (name_copy); return ((u16) ~ 0); } if (n < 0 || n > 1024) { clib_warning ("WARNING: bad number of message-IDs (%d) requested by '%s'", n, name_copy); vec_free (name_copy); return ((u16) ~ 0); } vec_add2 (am->msg_ranges, rp, 1); rv = rp->first_msg_id = am->first_available_msg_id; am->first_available_msg_id += n; rp->last_msg_id = am->first_available_msg_id - 1; rp->name = name_copy; hash_set_mem (am->msg_range_by_name, name_copy, rp - am->msg_ranges); return rv; } void vl_msg_api_add_msg_name_crc (api_main_t * am, const char *string, u32 id) { uword *p; if (am->msg_index_by_name_and_crc == 0) am->msg_index_by_name_and_crc = hash_create_string (0, sizeof (uword)); p = hash_get_mem (am->msg_index_by_name_and_crc, string); if (p) { clib_warning ("attempt to redefine '%s' ignored...", string); return; } hash_set_mem (am->msg_index_by_name_and_crc, string, id); } void vl_msg_api_add_version (api_main_t * am, const char *string, u32 major, u32 minor, u32 patch) { api_version_t version = {.major = major,.minor = minor,.patch = patch }; ASSERT (strlen (string) < 64); strncpy (version.name, string, 64 - 1); vec_add1 (am->api_version_list, version); } u32 vl_msg_api_get_msg_index (u8 * name_and_crc) { api_main_t *am = vlibapi_get_main (); uword *p; if (am->msg_index_by_name_and_crc) { p = hash_get_mem (am->msg_index_by_name_and_crc, name_and_crc); if (p) return p[0]; } return ~0; } void * vl_msg_push_heap_w_region (svm_region_t * vlib_rp) { pthread_mutex_lock (&vlib_rp->mutex); return svm_push_data_heap (vlib_rp); } void * vl_msg_push_heap (void) { api_main_t *am = vlibapi_get_main (); return vl_msg_push_heap_w_region (am->vlib_rp); } void vl_msg_pop_heap_w_region (svm_region_t * vlib_rp, void *oldheap) { svm_pop_heap (oldheap); pthread_mutex_unlock (&vlib_rp->mutex); } void vl_msg_pop_heap (void *oldheap) { api_main_t *am = vlibapi_get_main (); vl_msg_pop_heap_w_region (am->vlib_rp, oldheap); } /* Must be nul terminated */ int vl_api_c_string_to_api_string (const char *buf, vl_api_string_t * str) { /* copy without nul terminator */ u32 len = strlen (buf); if (len > 0) clib_memcpy_fast (str->buf, buf, len); str->length = htonl (len); return len + sizeof (u32); } /* Must NOT be nul terminated */ int vl_api_vec_to_api_string (const u8 * vec, vl_api_string_t * str) { u32 len = vec_len (vec); clib_memcpy (str->buf, vec, len); str->length = htonl (len); return len + sizeof (u32); } u32 vl_api_string_len (vl_api_string_t * astr) { return clib_net_to_host_u32 (astr->length); } u8 * vl_api_format_string (u8 * s, va_list * args) { vl_api_string_t *a = va_arg (*args, vl_api_string_t *); vec_add (s, a->buf, clib_net_to_host_u32 (a->length)); return s; } /* * Returns a new vector. Remember to free it after use. * NOT nul terminated. */ u8 * vl_api_from_api_to_new_vec (void *mp, vl_api_string_t * astr) { u8 *v = 0; if (vl_msg_api_max_length (mp) < clib_net_to_host_u32 (astr->length)) return format (0, "insane astr->length %u%c", clib_net_to_host_u32 (astr->length), 0); vec_add (v, astr->buf, clib_net_to_host_u32 (astr->length)); return v; } /* * Returns a new vector. Remember to free it after use. * Nul terminated. */ char * vl_api_from_api_to_new_c_string (vl_api_string_t * astr) { char *v = 0; if (clib_net_to_host_u32 (astr->length) > 0) { vec_add (v, astr->buf, clib_net_to_host_u32 (astr->length)); vec_add1 (v, 0); } return v; } void vl_api_set_elog_main (elog_main_t * m) { api_main_t *am = vlibapi_get_main (); am->elog_main = m; } int vl_api_set_elog_trace_api_messages (int enable) { int rv; api_main_t *am = vlibapi_get_main (); rv = am->elog_trace_api_messages; am->elog_trace_api_messages = enable; return rv; } int vl_api_get_elog_trace_api_messages (void) { api_main_t *am = vlibapi_get_main (); return am->elog_trace_api_messages; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */