pjsip_configuration.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2013, Digium, Inc.
 *
 * Matt Jordan <[email protected]>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

#include "asterisk.h"

#include <pjsip.h>
#include <pjsip_ua.h>

#include "asterisk/res_pjsip.h"
#include "include/res_pjsip_private.h"
#include "asterisk/res_pjsip_cli.h"
#include "asterisk/acl.h"
#include "asterisk/manager.h"
#include "asterisk/astobj2.h"
#include "asterisk/utils.h"
#include "asterisk/sorcery.h"
#include "asterisk/callerid.h"
#include "asterisk/test.h"
#include "asterisk/statsd.h"
#include "asterisk/pbx.h"
#include "asterisk/stream.h"
#include "asterisk/stasis.h"
#include "asterisk/security_events.h"

/*! \brief Number of buckets for persistent endpoint information */
#define PERSISTENT_BUCKETS 53

/*! \brief Persistent endpoint information */
struct sip_persistent_endpoint {
   /*! \brief Asterisk endpoint itself */
   struct ast_endpoint *endpoint;
};

/*! \brief Container for persistent endpoint information */
static struct ao2_container *persistent_endpoints;

static struct ast_sorcery *sip_sorcery;

static struct stasis_subscription *acl_change_sub;

/*! \brief Hashing function for persistent endpoint information */
static int persistent_endpoint_hash(const void *obj, const int flags)
{
   const struct sip_persistent_endpoint *persistent = obj;
   const char *id = (flags & OBJ_KEY ? obj : ast_endpoint_get_resource(persistent->endpoint));

   return ast_str_hash(id);
}

/*! \brief Comparison function for persistent endpoint information */
static int persistent_endpoint_cmp(void *obj, void *arg, int flags)
{
   const struct sip_persistent_endpoint *persistent1 = obj;
   const struct sip_persistent_endpoint *persistent2 = arg;
   const char *id = (flags & OBJ_KEY ? arg : ast_endpoint_get_resource(persistent2->endpoint));

   return !strcmp(ast_endpoint_get_resource(persistent1->endpoint), id) ? CMP_MATCH | CMP_STOP : 0;
}

static void endpoint_deleted_observer(const void *object)
{
   const struct ast_sip_endpoint *endpoint = object;

   ao2_find(persistent_endpoints, ast_endpoint_get_resource(endpoint->persistent),
      OBJ_SEARCH_KEY | OBJ_UNLINK | OBJ_NODATA);
}

static const struct ast_sorcery_observer endpoint_observers = {
   .deleted = endpoint_deleted_observer,
};

static int endpoint_acl_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   int error = 0;
   int ignore;

   if (ast_strlen_zero(var->value)) return 0;

   if (!strncmp(var->name, "contact_", 8)) {
      ast_append_acl(var->name + 8, var->value, &endpoint->contact_acl, &error, &ignore);
   } else {
      ast_append_acl(var->name, var->value, &endpoint->acl, &error, &ignore);
   }

   return error;
}

static int acl_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   struct ast_acl_list *acl_list;
   struct ast_acl *first_acl;

   if (endpoint && !ast_acl_list_is_empty(acl_list=endpoint->acl)) {
      AST_LIST_LOCK(acl_list);
      first_acl = AST_LIST_FIRST(acl_list);
      if (ast_strlen_zero(first_acl->name)) {
         *buf = "deny/permit";
      } else {
         *buf = first_acl->name;
      }
      AST_LIST_UNLOCK(acl_list);
   }

   *buf = ast_strdup(*buf);
   return 0;
}

static int contact_acl_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   struct ast_acl_list *acl_list;
   struct ast_acl *first_acl;

   if (endpoint && !ast_acl_list_is_empty(acl_list=endpoint->contact_acl)) {
      AST_LIST_LOCK(acl_list);
      first_acl = AST_LIST_FIRST(acl_list);
      if (ast_strlen_zero(first_acl->name)) {
         *buf = "deny/permit";
      } else {
         *buf = first_acl->name;
      }
      AST_LIST_UNLOCK(acl_list);
   }

   *buf = ast_strdup(*buf);
   return 0;
}

static int dtmf_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   int dtmf = ast_sip_str_to_dtmf(var->value);

   if (dtmf == -1) {
      return -1;
   }

   endpoint->dtmf = dtmf;
   return 0;
}

static int dtmf_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   char dtmf_str[20];
   int result = -1;

   result = ast_sip_dtmf_to_str(endpoint->dtmf, dtmf_str, sizeof(dtmf_str));

   if (result == 0) {
      *buf = ast_strdup(dtmf_str);
   } else {
      *buf = ast_strdup("none");
   }
   return 0;
}

static int prack_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   /* clear all */
   endpoint->extensions.flags &= ~(PJSIP_INV_SUPPORT_100REL | PJSIP_INV_REQUIRE_100REL);

   if (ast_true(var->value)) {
      endpoint->extensions.flags |= PJSIP_INV_SUPPORT_100REL;
   } else if (!strcasecmp(var->value, "required")) {
      endpoint->extensions.flags |= PJSIP_INV_REQUIRE_100REL;
   } else if (!ast_false(var->value)){
      return -1;
   }

   return 0;
}

static int prack_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   if (endpoint->extensions.flags & PJSIP_INV_REQUIRE_100REL) {
      *buf = "required";
   } else if (endpoint->extensions.flags & PJSIP_INV_SUPPORT_100REL) {
      *buf = "yes";
   } else {
      *buf = "no";
   }

   *buf = ast_strdup(*buf);
   return 0;
}

static int timers_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   /* clear all */
   endpoint->extensions.flags &= ~(PJSIP_INV_SUPPORT_TIMER | PJSIP_INV_REQUIRE_TIMER
               | PJSIP_INV_ALWAYS_USE_TIMER);

   /* set only the specified flag and let pjsip normalize if needed */
   if (ast_true(var->value)) {
      endpoint->extensions.flags |= PJSIP_INV_SUPPORT_TIMER;
   } else if (!strcasecmp(var->value, "required")) {
      endpoint->extensions.flags |= PJSIP_INV_REQUIRE_TIMER;
   } else if (!strcasecmp(var->value, "always") || !strcasecmp(var->value, "forced")) {
      endpoint->extensions.flags |= PJSIP_INV_ALWAYS_USE_TIMER;
   } else if (!ast_false(var->value)) {
      return -1;
   }

   return 0;
}

static int timers_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   if (endpoint->extensions.flags & PJSIP_INV_ALWAYS_USE_TIMER) {
      *buf = "always";
   } else if (endpoint->extensions.flags & PJSIP_INV_REQUIRE_TIMER) {
      *buf = "required";
   } else if (endpoint->extensions.flags & PJSIP_INV_SUPPORT_TIMER) {
      *buf = "yes";
   } else {
      *buf = "no";
   }

   *buf = ast_strdup(*buf);
   return 0;
}

void ast_sip_auth_vector_destroy(struct ast_sip_auth_vector *auths)
{
   int i;
   size_t size;

   if (!auths) {
      return;
   }

   size = AST_VECTOR_SIZE(auths);

   for (i = 0; i < size; ++i) {
      const char *name = AST_VECTOR_REMOVE_UNORDERED(auths, 0);
      ast_free((char *) name);
   }
   AST_VECTOR_FREE(auths);
}

int ast_sip_auth_vector_init(struct ast_sip_auth_vector *auths, const char *value)
{
   char *auth_names = ast_strdupa(value);
   char *val;

   ast_assert(auths != NULL);

   if (AST_VECTOR_SIZE(auths)) {
      ast_sip_auth_vector_destroy(auths);
   }
   if (AST_VECTOR_INIT(auths, 1)) {
      return -1;
   }

   while ((val = ast_strip(strsep(&auth_names, ",")))) {
      if (ast_strlen_zero(val)) {
         continue;
      }

      val = ast_strdup(val);
      if (!val) {
         goto failure;
      }
      if (AST_VECTOR_APPEND(auths, val)) {
         ast_free(val);

         goto failure;
      }
   }
   return 0;

failure:
   ast_sip_auth_vector_destroy(auths);
   return -1;
}

static int inbound_auth_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   return ast_sip_auth_vector_init(&endpoint->inbound_auths, var->value);
}

static int outbound_auth_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   return ast_sip_auth_vector_init(&endpoint->outbound_auths, var->value);
}

int ast_sip_auths_to_str(const struct ast_sip_auth_vector *auths, char **buf)
{
   if (!auths || !AST_VECTOR_SIZE(auths)) {
      return 0;
   }

   if (!(*buf = ast_calloc(MAX_OBJECT_FIELD, sizeof(char)))) {
      return -1;
   }

   /* I feel like accessing the vector's elem array directly is cheating...*/
   ast_join_delim(*buf, MAX_OBJECT_FIELD, auths->elems, AST_VECTOR_SIZE(auths), ',');
   return 0;
}

static int inbound_auths_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   return ast_sip_auths_to_str(&endpoint->inbound_auths, buf);
}

static int outbound_auths_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   return ast_sip_auths_to_str(&endpoint->outbound_auths, buf);
}

/*!
 * \internal
 * \brief Convert identify_by method to string.
 *
 * \param method Method value to convert to string
 *
 * \return String representation.
 */
static const char *sip_endpoint_identifier_type2str(enum ast_sip_endpoint_identifier_type method)
{
   const char *str = "<unknown>";

   switch (method) {
   case AST_SIP_ENDPOINT_IDENTIFY_BY_USERNAME:
      str = "username";
      break;
   case AST_SIP_ENDPOINT_IDENTIFY_BY_AUTH_USERNAME:
      str = "auth_username";
      break;
   case AST_SIP_ENDPOINT_IDENTIFY_BY_IP:
      str = "ip";
      break;
   case AST_SIP_ENDPOINT_IDENTIFY_BY_HEADER:
      str = "header";
      break;
   }
   return str;
}

/*!
 * \internal
 * \brief Convert string to an endpoint identifier token.
 *
 * \param str String to convert
 *
 * \retval enum ast_sip_endpoint_identifier_type token value on success.
 * \retval -1 on failure.
 */
static int sip_endpoint_identifier_str2type(const char *str)
{
   int method;

   if (!strcasecmp(str, "username")) {
      method = AST_SIP_ENDPOINT_IDENTIFY_BY_USERNAME;
   } else if (!strcasecmp(str, "auth_username")) {
      method = AST_SIP_ENDPOINT_IDENTIFY_BY_AUTH_USERNAME;
   } else if (!strcasecmp(str, "ip")) {
      method = AST_SIP_ENDPOINT_IDENTIFY_BY_IP;
   } else if (!strcasecmp(str, "header")) {
      method = AST_SIP_ENDPOINT_IDENTIFY_BY_HEADER;
   } else {
      method = -1;
   }
   return method;
}

static int ident_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   char *idents = ast_strdupa(var->value);
   char *val;
   int method;

   /*
    * If there's already something in the vector when we get here,
    * it's the default value so we need to clean it out.
    */
   if (AST_VECTOR_SIZE(&endpoint->ident_method_order)) {
      AST_VECTOR_RESET(&endpoint->ident_method_order, AST_VECTOR_ELEM_CLEANUP_NOOP);
      endpoint->ident_method = 0;
   }

   while ((val = ast_strip(strsep(&idents, ",")))) {
      if (ast_strlen_zero(val)) {
         continue;
      }

      method = sip_endpoint_identifier_str2type(val);
      if (method == -1) {
         ast_log(LOG_ERROR, "Unrecognized identification method %s specified for endpoint %s\n",
               val, ast_sorcery_object_get_id(endpoint));
         AST_VECTOR_RESET(&endpoint->ident_method_order, AST_VECTOR_ELEM_CLEANUP_NOOP);
         endpoint->ident_method = 0;
         return -1;
      }
      if (endpoint->ident_method & method) {
         /* We are already indentifying by this method.  No need to do it again. */
         continue;
      }

      endpoint->ident_method |= method;
      AST_VECTOR_APPEND(&endpoint->ident_method_order, method);
   }

   return 0;
}

static int ident_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   int methods;
   int idx;
   int buf_used = 0;
   int buf_size = MAX_OBJECT_FIELD;

   methods = AST_VECTOR_SIZE(&endpoint->ident_method_order);
   if (!methods) {
      return 0;
   }

   *buf = ast_malloc(buf_size);
   if (!*buf) {
      return -1;
   }

   for (idx = 0; idx < methods; ++idx) {
      enum ast_sip_endpoint_identifier_type method;
      const char *method_str;

      method = AST_VECTOR_GET(&endpoint->ident_method_order, idx);
      method_str = sip_endpoint_identifier_type2str(method);

      /* Should never have an "<unknown>" method string */
      ast_assert(strcmp(method_str, "<unknown>"));
      if (!strcmp(method_str, "<unknown>")) {
         continue;
      }

      buf_used += snprintf(*buf + buf_used, buf_size - buf_used, "%s%s",
         method_str, idx < methods - 1 ? "," : "");
      if (buf_size <= buf_used) {
         /* Need more room than available, truncating. */
         *(*buf + (buf_size - 1)) = '\0';
         ast_log(LOG_WARNING, "Truncated identify_by string: %s\n", *buf);
         break;
      }
   }

   return 0;
}

static int redirect_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strcasecmp(var->value, "user")) {
      endpoint->redirect_method = AST_SIP_REDIRECT_USER;
   } else if (!strcasecmp(var->value, "uri_core")) {
      endpoint->redirect_method = AST_SIP_REDIRECT_URI_CORE;
   } else if (!strcasecmp(var->value, "uri_pjsip")) {
      endpoint->redirect_method = AST_SIP_REDIRECT_URI_PJSIP;
   } else {
      ast_log(LOG_ERROR, "Unrecognized redirect method %s specified for endpoint %s\n",
         var->value, ast_sorcery_object_get_id(endpoint));
      return -1;
   }

   return 0;
}

static int direct_media_method_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strcasecmp(var->value, "invite") || !strcasecmp(var->value, "reinvite")) {
      endpoint->media.direct_media.method = AST_SIP_SESSION_REFRESH_METHOD_INVITE;
   } else if (!strcasecmp(var->value, "update")) {
      endpoint->media.direct_media.method = AST_SIP_SESSION_REFRESH_METHOD_UPDATE;
   } else {
      ast_log(LOG_NOTICE, "Unrecognized option value %s for %s on endpoint %s\n",
            var->value, var->name, ast_sorcery_object_get_id(endpoint));
      return -1;
   }
   return 0;
}

static const char *id_configuration_refresh_methods[] = {
   [AST_SIP_SESSION_REFRESH_METHOD_INVITE] = "invite",
   [AST_SIP_SESSION_REFRESH_METHOD_UPDATE] = "update"
};

static int direct_media_method_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (ARRAY_IN_BOUNDS(endpoint->id.refresh_method, id_configuration_refresh_methods)) {
      *buf = ast_strdup(id_configuration_refresh_methods[endpoint->id.refresh_method]);
   }
   return 0;
}

static int connected_line_method_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strcasecmp(var->value, "invite") || !strcasecmp(var->value, "reinvite")) {
      endpoint->id.refresh_method = AST_SIP_SESSION_REFRESH_METHOD_INVITE;
   } else if (!strcasecmp(var->value, "update")) {
      endpoint->id.refresh_method = AST_SIP_SESSION_REFRESH_METHOD_UPDATE;
   } else {
      ast_log(LOG_NOTICE, "Unrecognized option value %s for %s on endpoint %s\n",
            var->value, var->name, ast_sorcery_object_get_id(endpoint));
      return -1;
   }
   return 0;
}

static int connected_line_method_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(id_configuration_refresh_methods[endpoint->id.refresh_method]);
   return 0;
}

static int direct_media_glare_mitigation_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strcasecmp(var->value, "none")) {
      endpoint->media.direct_media.glare_mitigation = AST_SIP_DIRECT_MEDIA_GLARE_MITIGATION_NONE;
   } else if (!strcasecmp(var->value, "outgoing")) {
      endpoint->media.direct_media.glare_mitigation = AST_SIP_DIRECT_MEDIA_GLARE_MITIGATION_OUTGOING;
   } else if (!strcasecmp(var->value, "incoming")) {
      endpoint->media.direct_media.glare_mitigation = AST_SIP_DIRECT_MEDIA_GLARE_MITIGATION_INCOMING;
   } else {
      ast_log(LOG_NOTICE, "Unrecognized option value %s for %s on endpoint %s\n",
            var->value, var->name, ast_sorcery_object_get_id(endpoint));
      return -1;
   }

   return 0;
}

static const char *direct_media_glare_mitigation_map[] = {
   [AST_SIP_DIRECT_MEDIA_GLARE_MITIGATION_NONE] = "none",
   [AST_SIP_DIRECT_MEDIA_GLARE_MITIGATION_OUTGOING] = "outgoing",
   [AST_SIP_DIRECT_MEDIA_GLARE_MITIGATION_INCOMING] = "incoming"
};

static int direct_media_glare_mitigation_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (ARRAY_IN_BOUNDS(endpoint->media.direct_media.glare_mitigation, direct_media_glare_mitigation_map)) {
      *buf = ast_strdup(direct_media_glare_mitigation_map[endpoint->media.direct_media.glare_mitigation]);
   }

   return 0;
}

static int caller_id_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   char cid_name[80] = { '\0' };
   char cid_num[80] = { '\0' };

   ast_free(endpoint->id.self.name.str);
   endpoint->id.self.name.str = NULL;
   endpoint->id.self.name.valid = 0;
   ast_free(endpoint->id.self.number.str);
   endpoint->id.self.number.str = NULL;
   endpoint->id.self.number.valid = 0;

   ast_callerid_split(var->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
   if (!ast_strlen_zero(cid_name)) {
      endpoint->id.self.name.str = ast_strdup(cid_name);
      if (!endpoint->id.self.name.str) {
         return -1;
      }
      endpoint->id.self.name.valid = 1;
   }
   if (!ast_strlen_zero(cid_num)) {
      endpoint->id.self.number.str = ast_strdup(cid_num);
      if (!endpoint->id.self.number.str) {
         return -1;
      }
      endpoint->id.self.number.valid = 1;
   }
   return 0;
}

static int caller_id_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   const char *name = S_COR(endpoint->id.self.name.valid,
             endpoint->id.self.name.str, NULL);
   const char *number = S_COR(endpoint->id.self.number.valid,
               endpoint->id.self.number.str, NULL);

   /* make sure size is at least 10 - that should cover the "<unknown>"
      case as well as any additional formatting characters added in
      the name and/or number case. */
   int size = 10;
   size += name ? strlen(name) : 0;
   size += number ? strlen(number) : 0;

   if (!(*buf = ast_calloc(size + 1, sizeof(char)))) {
      return -1;
   }

   ast_callerid_merge(*buf, size + 1, name, number, NULL);
   return 0;
}

static int caller_id_privacy_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   int callingpres = ast_parse_caller_presentation(var->value);
   if (callingpres == -1 && sscanf(var->value, "%d", &callingpres) != 1) {
      return -1;
   }
   endpoint->id.self.number.presentation = callingpres;
   endpoint->id.self.name.presentation = callingpres;
   return 0;
}

static int caller_id_privacy_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   const char *presentation = ast_named_caller_presentation(
      endpoint->id.self.name.presentation);

   *buf = ast_strdup(presentation);
   return 0;
}

static int caller_id_tag_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   ast_free(endpoint->id.self.tag);
   endpoint->id.self.tag = ast_strdup(var->value);

   return endpoint->id.self.tag ? 0 : -1;
}

static int caller_id_tag_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(endpoint->id.self.tag);
   return 0;
}

static int media_encryption_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strcasecmp("no", var->value)) {
      endpoint->media.rtp.encryption = AST_SIP_MEDIA_ENCRYPT_NONE;
   } else if (!strcasecmp("sdes", var->value)) {
      endpoint->media.rtp.encryption = AST_SIP_MEDIA_ENCRYPT_SDES;
   } else if (!strcasecmp("dtls", var->value)) {
      endpoint->media.rtp.encryption = AST_SIP_MEDIA_ENCRYPT_DTLS;
      return ast_rtp_dtls_cfg_parse(&endpoint->media.rtp.dtls_cfg, "dtlsenable", "yes");
   } else {
      return -1;
   }

   return 0;
}

static const char *media_encryption_map[] = {
   [AST_SIP_MEDIA_TRANSPORT_INVALID] = "invalid",
   [AST_SIP_MEDIA_ENCRYPT_NONE] = "no",
   [AST_SIP_MEDIA_ENCRYPT_SDES] = "sdes",
   [AST_SIP_MEDIA_ENCRYPT_DTLS] = "dtls",
};

static int media_encryption_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (ARRAY_IN_BOUNDS(endpoint->media.rtp.encryption, media_encryption_map)) {
      *buf = ast_strdup(media_encryption_map[
                 endpoint->media.rtp.encryption]);
   }
   return 0;
}

static int group_handler(const struct aco_option *opt,
          struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strncmp(var->name, "call_group", 10)) {
      endpoint->pickup.callgroup = ast_get_group(var->value);
   } else if (!strncmp(var->name, "pickup_group", 12)) {
      endpoint->pickup.pickupgroup = ast_get_group(var->value);
   } else {
      return -1;
   }

   return 0;
}

static int callgroup_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   if (!(*buf = ast_calloc(MAX_OBJECT_FIELD, sizeof(char)))) {
      return -1;
   }

   ast_print_group(*buf, MAX_OBJECT_FIELD, endpoint->pickup.callgroup);
   return 0;
}

static int pickupgroup_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   if (!(*buf = ast_calloc(MAX_OBJECT_FIELD, sizeof(char)))) {
      return -1;
   }

   ast_print_group(*buf, MAX_OBJECT_FIELD, endpoint->pickup.pickupgroup);
   return 0;
}

static int named_groups_handler(const struct aco_option *opt,
            struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strncmp(var->name, "named_call_group", 16)) {
      if (ast_strlen_zero(var->value)) {
         endpoint->pickup.named_callgroups =
            ast_unref_namedgroups(endpoint->pickup.named_callgroups);
      } else if (!(endpoint->pickup.named_callgroups =
            ast_get_namedgroups(var->value))) {
         return -1;
      }
   } else if (!strncmp(var->name, "named_pickup_group", 18)) {
      if (ast_strlen_zero(var->value)) {
         endpoint->pickup.named_pickupgroups =
            ast_unref_namedgroups(endpoint->pickup.named_pickupgroups);
      } else if (!(endpoint->pickup.named_pickupgroups =
            ast_get_namedgroups(var->value))) {
         return -1;
      }
   } else {
      return -1;
   }

   return 0;
}

static int named_callgroups_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   RAII_VAR(struct ast_str *, str, ast_str_create(MAX_OBJECT_FIELD), ast_free);

   ast_print_namedgroups(&str, endpoint->pickup.named_callgroups);
   *buf = ast_strdup(ast_str_buffer(str));
   return 0;
}

static int named_pickupgroups_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   RAII_VAR(struct ast_str *, str, ast_str_create(MAX_OBJECT_FIELD), ast_free);

   ast_print_namedgroups(&str, endpoint->pickup.named_pickupgroups);
   *buf = ast_strdup(ast_str_buffer(str));
   return 0;
}

static int dtls_handler(const struct aco_option *opt,
          struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   char *name = ast_strdupa(var->name);
   char *front = NULL;
   char *back = NULL;
   char *buf = name;

   /* strip out underscores in the name */
   front = strtok_r(buf, "_", &back);
   while (front) {
      int size = strlen(front);
      ast_copy_string(buf, front, size + 1);
      buf += size;
      front = strtok_r(NULL, "_", &back);
   }

   return ast_rtp_dtls_cfg_parse(&endpoint->media.rtp.dtls_cfg, name, var->value);
}

static int dtlsverify_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(AST_YESNO(endpoint->media.rtp.dtls_cfg.verify));
   return 0;
}

static int dtlsrekey_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   return ast_asprintf(
      buf, "%u", endpoint->media.rtp.dtls_cfg.rekey) >=0 ? 0 : -1;
}

static int dtlsautogeneratecert_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(AST_YESNO(endpoint->media.rtp.dtls_cfg.ephemeral_cert));
   return 0;
}

static int dtlscertfile_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(endpoint->media.rtp.dtls_cfg.certfile);
   return 0;
}

static int dtlsprivatekey_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(endpoint->media.rtp.dtls_cfg.pvtfile);
   return 0;
}

static int dtlscipher_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(endpoint->media.rtp.dtls_cfg.cipher);
   return 0;
}

static int dtlscafile_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(endpoint->media.rtp.dtls_cfg.cafile);
   return 0;
}

static int dtlscapath_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   *buf = ast_strdup(endpoint->media.rtp.dtls_cfg.capath);
   return 0;
}

static const char *ast_rtp_dtls_setup_map[] = {
   [AST_RTP_DTLS_SETUP_ACTIVE] = "active",
   [AST_RTP_DTLS_SETUP_PASSIVE] = "passive",
   [AST_RTP_DTLS_SETUP_ACTPASS] = "actpass",
   [AST_RTP_DTLS_SETUP_HOLDCONN] = "holdconn",
};

static int dtlssetup_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (ARRAY_IN_BOUNDS(endpoint->media.rtp.dtls_cfg.default_setup, ast_rtp_dtls_setup_map)) {
      *buf = ast_strdup(ast_rtp_dtls_setup_map[endpoint->media.rtp.dtls_cfg.default_setup]);
   }
   return 0;
}

static const char *ast_rtp_dtls_fingerprint_map[] = {
   [AST_RTP_DTLS_HASH_SHA256] = "SHA-256",
   [AST_RTP_DTLS_HASH_SHA1] = "SHA-1",
};

static int dtlsfingerprint_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (ARRAY_IN_BOUNDS(endpoint->media.rtp.dtls_cfg.hash, ast_rtp_dtls_fingerprint_map)) {
      *buf = ast_strdup(ast_rtp_dtls_fingerprint_map[endpoint->media.rtp.dtls_cfg.hash]);
   }
   return 0;
}

static int t38udptl_ec_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!strcmp(var->value, "none")) {
      endpoint->media.t38.error_correction = UDPTL_ERROR_CORRECTION_NONE;
   } else if (!strcmp(var->value, "fec")) {
      endpoint->media.t38.error_correction = UDPTL_ERROR_CORRECTION_FEC;
   } else if (!strcmp(var->value, "redundancy")) {
      endpoint->media.t38.error_correction = UDPTL_ERROR_CORRECTION_REDUNDANCY;
   } else {
      return -1;
   }

   return 0;
}

static const char *ast_t38_ec_modes_map[] = {
   [UDPTL_ERROR_CORRECTION_NONE] = "none",
   [UDPTL_ERROR_CORRECTION_FEC] = "fec",
   [UDPTL_ERROR_CORRECTION_REDUNDANCY] = "redundancy"
};

static int t38udptl_ec_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (ARRAY_IN_BOUNDS(endpoint->media.t38.error_correction, ast_t38_ec_modes_map)) {
      *buf = ast_strdup(ast_t38_ec_modes_map[
                 endpoint->media.t38.error_correction]);
   }
   return 0;
}

static int tos_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   unsigned int value;

   if (ast_str2tos(var->value, &value)) {
      ast_log(LOG_ERROR, "Error configuring endpoint '%s' - Could not "
         "interpret '%s' value '%s'\n",
         ast_sorcery_object_get_id(endpoint), var->name, var->value);
      return -1;
   }

   if (!strcmp(var->name, "tos_audio")) {
      endpoint->media.tos_audio = value;
   } else if (!strcmp(var->name, "tos_video")) {
      endpoint->media.tos_video = value;
   } else {
      /* If we reach this point, someone called the tos_handler when they shouldn't have. */
      ast_assert(0);
      return -1;
   }
   return 0;
}

static int tos_audio_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   if (ast_asprintf(buf, "%u", endpoint->media.tos_audio) == -1) {
      return -1;
   }
   return 0;
}

static int tos_video_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   if (ast_asprintf(buf, "%u", endpoint->media.tos_video) == -1) {
      return -1;
   }
   return 0;
}

static int from_user_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   /* Valid non-alphanumeric characters for URI */
   char *valid_uri_marks = "-._~%!$&'()*+,;=:";
   const char *val;

   for (val = var->value; *val; val++) {
      if (!isalpha(*val) && !isdigit(*val) && !strchr(valid_uri_marks, *val)) {
         ast_log(LOG_ERROR, "Error configuring endpoint '%s' - '%s' field "
         "contains invalid character '%c'\n",
         ast_sorcery_object_get_id(endpoint), var->name, *val);
         return -1;
      }
   }

   ast_string_field_set(endpoint, fromuser, var->value);

   return 0;
}

static int from_user_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   *buf = ast_strdup(endpoint->fromuser);

   return 0;
}

static int set_var_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   struct ast_variable *new_var;
   char *name;
   char *val;

   if (ast_strlen_zero(var->value)) {
      return 0;
   }

   name = ast_strdupa(var->value);
   val = strchr(name, '=');

   if (!val) {
      return -1;
   }

   *val++ = '\0';

   if (!(new_var = ast_variable_new(name, val, ""))) {
      return -1;
   }

   if (ast_variable_list_replace(&endpoint->channel_vars, new_var)) {
      ast_variable_list_append(&endpoint->channel_vars, new_var);
   }

   return 0;
}

static int set_var_to_str(const void *obj, const intptr_t *args, char **buf)
{
   struct ast_str *str = ast_str_create(MAX_OBJECT_FIELD);
   const struct ast_sip_endpoint *endpoint = obj;
   struct ast_variable *var;

   for (var = endpoint->channel_vars; var; var = var->next) {
      ast_str_append(&str, 0, "%s=%s,", var->name, var->value);
   }

   *buf = ast_strdup(ast_str_truncate(str, -1));
   ast_free(str);
   return 0;
}

static int set_var_to_vl(const void *obj, struct ast_variable **fields)
{
   const struct ast_sip_endpoint *endpoint = obj;
   if (endpoint->channel_vars) {
      *fields = ast_variables_dup(endpoint->channel_vars);
   }
   return 0;
}

static int voicemail_extension_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   ast_free(endpoint->subscription.mwi.voicemail_extension);
   endpoint->subscription.mwi.voicemail_extension = ast_strdup(var->value);

   return endpoint->subscription.mwi.voicemail_extension ? 0 : -1;
}

static int voicemail_extension_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   *buf = ast_strdup(endpoint->subscription.mwi.voicemail_extension);

   return 0;
}

static int contact_user_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   ast_free(endpoint->contact_user);
   endpoint->contact_user = ast_strdup(var->value);

   return endpoint->contact_user ? 0 : -1;
}

static int contact_user_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   *buf = ast_strdup(endpoint->contact_user);
   if (!(*buf)) {
      return -1;
   }

   return 0;
}

static int call_offer_pref_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   struct ast_flags pref = { 0, };
   int outgoing = strcmp(var->name, "outgoing_call_offer_pref") == 0;

   int res = ast_sip_call_codec_str_to_pref(&pref, var->value, outgoing);
   if (res != 0) {
      return -1;
   }

   if (outgoing) {
      endpoint->media.outgoing_call_offer_pref = pref;
   } else {
      endpoint->media.incoming_call_offer_pref = pref;
   }

   return 0;
}

static int incoming_call_offer_pref_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   *buf = ast_strdup(ast_sip_call_codec_pref_to_str(endpoint->media.incoming_call_offer_pref));
   if (!(*buf)) {
      return -1;
   }

   return 0;
}

static int outgoing_call_offer_pref_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;

   *buf = ast_strdup(ast_sip_call_codec_pref_to_str(endpoint->media.outgoing_call_offer_pref));
   if (!(*buf)) {
      return -1;
   }

   return 0;
}

static int codec_prefs_handler(const struct aco_option *opt,
   struct ast_variable *var, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;
   struct ast_stream_codec_negotiation_prefs *option_prefs;
   struct ast_stream_codec_negotiation_prefs prefs;
   struct ast_str *error_message = ast_str_create(128);
   enum ast_stream_codec_negotiation_prefs_prefer_values default_prefer;
   enum ast_stream_codec_negotiation_prefs_operation_values default_operation;
   int res = 0;

   res = ast_stream_codec_prefs_parse(var->value, &prefs, &error_message);
   if (res < 0) {
      ast_log(LOG_ERROR, "Endpoint '%s': %s for option '%s'\n",
         ast_sorcery_object_get_id(endpoint), ast_str_buffer(error_message), var->name);
      ast_free(error_message);
      return -1;
   }
   ast_free(error_message);

   if (strcmp(var->name, "codec_prefs_incoming_offer") == 0) {
      if (prefs.operation == CODEC_NEGOTIATION_OPERATION_UNION) {
         ast_log(LOG_ERROR, "Endpoint '%s': Codec preference '%s' has invalid value '%s' for option: '%s'",
            ast_sorcery_object_get_id(endpoint),
            ast_stream_codec_param_to_str(CODEC_NEGOTIATION_PARAM_OPERATION),
            ast_stream_codec_operation_to_str(CODEC_NEGOTIATION_OPERATION_UNION),
            var->name);
         return -1;
      }
      option_prefs = &endpoint->media.codec_prefs_incoming_offer;
      default_prefer = CODEC_NEGOTIATION_PREFER_PENDING;
      default_operation = CODEC_NEGOTIATION_OPERATION_INTERSECT;
   } else if (strcmp(var->name, "codec_prefs_outgoing_offer") == 0) {
      option_prefs = &endpoint->media.codec_prefs_outgoing_offer;
      default_prefer = CODEC_NEGOTIATION_PREFER_PENDING;
      default_operation = CODEC_NEGOTIATION_OPERATION_UNION;
   } else if (strcmp(var->name, "codec_prefs_incoming_answer") == 0) {
      option_prefs = &endpoint->media.codec_prefs_incoming_answer;
      default_prefer = CODEC_NEGOTIATION_PREFER_PENDING;
      default_operation = CODEC_NEGOTIATION_OPERATION_INTERSECT;
   } else if (strcmp(var->name, "codec_prefs_outgoing_answer") == 0) {
      option_prefs = &endpoint->media.codec_prefs_outgoing_answer;
      default_prefer = CODEC_NEGOTIATION_PREFER_PENDING;
      default_operation = CODEC_NEGOTIATION_OPERATION_INTERSECT;
   } else {
      ast_log(LOG_ERROR, "Endpoint '%s': Unsupported option '%s'\n",
         ast_sorcery_object_get_id(endpoint),
         var->name);
      return -1;
   }

   if (prefs.prefer == CODEC_NEGOTIATION_PREFER_UNSPECIFIED) {
      prefs.prefer = default_prefer;
   }

   if (prefs.operation == CODEC_NEGOTIATION_OPERATION_UNSPECIFIED) {
      prefs.operation = default_operation;
   }

   if (prefs.keep == CODEC_NEGOTIATION_KEEP_UNSPECIFIED) {
      prefs.keep = CODEC_NEGOTIATION_KEEP_ALL;
   }

   if (prefs.transcode == CODEC_NEGOTIATION_TRANSCODE_UNSPECIFIED) {
      prefs.transcode = CODEC_NEGOTIATION_TRANSCODE_ALLOW;
   }

   /* Now that defaults have been applied as needed we apply the full codec
    * preference configuration to the option.
    */
   *option_prefs = prefs;

   return 0;
}

static int codec_prefs_to_str(const struct ast_stream_codec_negotiation_prefs *prefs,
   const void *obj, const intptr_t *args, char **buf)
{
   struct ast_str *codecs = ast_str_create(AST_STREAM_MAX_CODEC_PREFS_LENGTH);

   if (!codecs) {
      return -1;
   }

   *buf = ast_strdup(ast_stream_codec_prefs_to_str(prefs, &codecs));
   ast_free(codecs);

   return 0;
}

static int incoming_offer_codec_prefs_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   return codec_prefs_to_str(&endpoint->media.codec_prefs_incoming_offer, obj, args, buf);
}

static int outgoing_offer_codec_prefs_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   return codec_prefs_to_str(&endpoint->media.codec_prefs_outgoing_offer, obj, args, buf);
}

static int incoming_answer_codec_prefs_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   return codec_prefs_to_str(&endpoint->media.codec_prefs_incoming_answer, obj, args, buf);
}

static int outgoing_answer_codec_prefs_to_str(const void *obj, const intptr_t *args, char **buf)
{
   const struct ast_sip_endpoint *endpoint = obj;
   return codec_prefs_to_str(&endpoint->media.codec_prefs_outgoing_answer, obj, args, buf);
}

static void *sip_nat_hook_alloc(const char *name)
{
   return ast_sorcery_generic_alloc(sizeof(struct ast_sip_nat_hook), NULL);
}

/*! \brief Destructor function for persistent endpoint information */
static void persistent_endpoint_destroy(void *obj)
{
   struct sip_persistent_endpoint *persistent = obj;

   ast_endpoint_shutdown(persistent->endpoint);
}

static int add_to_regcontext(void *obj, void *arg, int flags)
{
   struct sip_persistent_endpoint *persistent = obj;
   const char *regcontext = arg;

   if (ast_endpoint_get_state(persistent->endpoint) == AST_ENDPOINT_ONLINE) {
      if (!ast_exists_extension(NULL, regcontext, ast_endpoint_get_resource(
            persistent->endpoint), 1, NULL)) {
         ast_add_extension(regcontext, 1, ast_endpoint_get_resource(persistent->endpoint), 1, NULL, NULL,
            "Noop", ast_strdup(ast_endpoint_get_resource(persistent->endpoint)), ast_free_ptr, "PJSIP");
      }
   }

   return 0;
}

int ast_sip_persistent_endpoint_add_to_regcontext(const char *regcontext)
{
   if (ast_strlen_zero(regcontext)) {
      return 0;
   }

   /* Make sure the regcontext exists */
   if (!ast_context_find_or_create(NULL, NULL, regcontext, "PJSIP")) {
      ast_log(LOG_ERROR, "Failed to create regcontext '%s'\n", regcontext);
      return -1;
   }

   /* Add any online endpoints */
   ao2_callback(persistent_endpoints, OBJ_NODATA, add_to_regcontext, (void *)regcontext);
   return 0;
}

int ast_sip_persistent_endpoint_update_state(const char *endpoint_name, enum ast_endpoint_state state)
{
   struct sip_persistent_endpoint *persistent;
   struct ast_json *blob;
   char *regcontext;

   persistent = ao2_find(persistent_endpoints, endpoint_name, OBJ_SEARCH_KEY);
   if (!persistent) {
      return -1;
   }

   /* If there was no state change, don't publish anything. */
   if (ast_endpoint_get_state(persistent->endpoint) == state) {
      ao2_ref(persistent, -1);
      return 0;
   }

   regcontext = ast_sip_get_regcontext();

   if (state == AST_ENDPOINT_ONLINE) {
      ast_endpoint_set_state(persistent->endpoint, AST_ENDPOINT_ONLINE);
      blob = ast_json_pack("{s: s}", "peer_status", "Reachable");

      if (!ast_strlen_zero(regcontext)) {
         if (!ast_exists_extension(NULL, regcontext, ast_endpoint_get_resource(persistent->endpoint), 1, NULL)) {
            ast_add_extension(regcontext, 1, ast_endpoint_get_resource(persistent->endpoint), 1, NULL, NULL,
               "Noop", ast_strdup(ast_endpoint_get_resource(persistent->endpoint)), ast_free_ptr, "PJSIP");
         }
      }

      ast_verb(2, "Endpoint %s is now Reachable\n", ast_endpoint_get_resource(persistent->endpoint));
   } else {
      ast_endpoint_set_state(persistent->endpoint, AST_ENDPOINT_OFFLINE);
      blob = ast_json_pack("{s: s}", "peer_status", "Unreachable");

      if (!ast_strlen_zero(regcontext)) {
         struct pbx_find_info q = { .stacklen = 0 };

         if (pbx_find_extension(NULL, NULL, &q, regcontext, ast_endpoint_get_resource(persistent->endpoint), 1, NULL, "", E_MATCH)) {
            ast_context_remove_extension(regcontext, ast_endpoint_get_resource(persistent->endpoint), 1, NULL);
         }
      }

      ast_verb(2, "Endpoint %s is now Unreachable\n", ast_endpoint_get_resource(persistent->endpoint));
   }

   ast_free(regcontext);

   ast_endpoint_blob_publish(persistent->endpoint, ast_endpoint_state_type(), blob);
   ast_json_unref(blob);
   ast_devstate_changed(AST_DEVICE_UNKNOWN, AST_DEVSTATE_CACHABLE, "PJSIP/%s", ast_endpoint_get_resource(persistent->endpoint));

   ao2_ref(persistent, -1);

   return 0;
}

void ast_sip_persistent_endpoint_publish_contact_state(const char *endpoint_name, const struct ast_sip_contact_status *contact_status)
{
   struct sip_persistent_endpoint *persistent;
   struct ast_json *blob;
   char rtt[32];

   persistent = ao2_find(persistent_endpoints, endpoint_name, OBJ_SEARCH_KEY);
   if (!persistent) {
      return;
   }

   snprintf(rtt, sizeof(rtt), "%" PRId64, contact_status->rtt);
   blob = ast_json_pack("{s: s, s: s, s: s, s: s, s: s}",
      "contact_status", ast_sip_get_contact_status_label(contact_status->status),
      "aor", contact_status->aor,
      "uri", contact_status->uri,
      "roundtrip_usec", rtt,
      "endpoint_name", ast_endpoint_get_resource(persistent->endpoint));
   if (blob) {
      ast_endpoint_blob_publish(persistent->endpoint, ast_endpoint_contact_state_type(), blob);
      ast_json_unref(blob);
   }

   ao2_ref(persistent, -1);
}

/*! \brief Internal function which finds (or creates) persistent endpoint information */
static struct ast_endpoint *persistent_endpoint_find_or_create(const struct ast_sip_endpoint *endpoint)
{
   RAII_VAR(struct sip_persistent_endpoint *, persistent, NULL, ao2_cleanup);
   SCOPED_AO2LOCK(lock, persistent_endpoints);

   persistent = ao2_find(persistent_endpoints, ast_sorcery_object_get_id(endpoint),
      OBJ_SEARCH_KEY | OBJ_NOLOCK);
   if (!persistent) {
      persistent = ao2_alloc_options(sizeof(*persistent), persistent_endpoint_destroy,
         AO2_ALLOC_OPT_LOCK_NOLOCK);
      if (!persistent) {
         return NULL;
      }

      persistent->endpoint = ast_endpoint_create("PJSIP",
         ast_sorcery_object_get_id(endpoint));
      if (!persistent->endpoint) {
         return NULL;
      }

      ast_endpoint_set_state(persistent->endpoint, AST_ENDPOINT_OFFLINE);

      ao2_link_flags(persistent_endpoints, persistent, OBJ_NOLOCK);
   }

   ao2_ref(persistent->endpoint, +1);
   return persistent->endpoint;
}

/*! \brief Callback function for when an object is finalized */
static int sip_endpoint_apply_handler(const struct ast_sorcery *sorcery, void *obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   if (!(endpoint->persistent = persistent_endpoint_find_or_create(endpoint))) {
      return -1;
   }

   if (endpoint->extensions.timer.min_se < 90) {
      ast_log(LOG_ERROR, "Session timer minimum expires time must be 90 or greater on endpoint '%s'\n",
         ast_sorcery_object_get_id(endpoint));
      return -1;
   } else if (endpoint->extensions.timer.sess_expires < endpoint->extensions.timer.min_se) {
      ast_log(LOG_ERROR, "Session timer expires must be greater than minimum session expires time on endpoint '%s'\n",
         ast_sorcery_object_get_id(endpoint));
      return -1;
   }

   if (ast_rtp_dtls_cfg_validate(&endpoint->media.rtp.dtls_cfg)) {
      return -1;
   }

   if (endpoint->preferred_codec_only) {
      if (endpoint->media.incoming_call_offer_pref.flags != (AST_SIP_CALL_CODEC_PREF_LOCAL | AST_SIP_CALL_CODEC_PREF_INTERSECT | AST_SIP_CALL_CODEC_PREF_ALL)) {
         ast_log(LOG_ERROR, "Setting both preferred_codec_only and incoming_call_offer_pref is not supported on endpoint '%s'\n",
            ast_sorcery_object_get_id(endpoint));
         return -1;
      }
      ast_clear_flag(&endpoint->media.incoming_call_offer_pref, AST_SIP_CALL_CODEC_PREF_ALL);
      ast_set_flag(&endpoint->media.incoming_call_offer_pref, AST_SIP_CALL_CODEC_PREF_FIRST);
   }

   endpoint->media.topology = ast_stream_topology_create_from_format_cap(endpoint->media.codecs);
   if (!endpoint->media.topology) {
      return -1;
   }

   endpoint->media.rtcp_mux |= endpoint->media.bundle;

   /*
    * If webrtc has been enabled then enable those attributes, and default
    * some, that are needed in order for webrtc to work.
    */
   endpoint->media.bundle |= endpoint->media.webrtc;
   endpoint->media.rtcp_mux |= endpoint->media.webrtc;
   endpoint->media.rtp.use_avpf |= endpoint->media.webrtc;
   endpoint->media.rtp.ice_support |= endpoint->media.webrtc;
   endpoint->media.rtp.use_received_transport |= endpoint->media.webrtc;

   if (endpoint->media.webrtc) {
      endpoint->media.rtp.encryption = AST_SIP_MEDIA_ENCRYPT_DTLS;
      endpoint->media.rtp.dtls_cfg.enabled = 1;
      endpoint->media.rtp.dtls_cfg.default_setup = AST_RTP_DTLS_SETUP_ACTPASS;
      endpoint->media.rtp.dtls_cfg.verify = AST_RTP_DTLS_VERIFY_FINGERPRINT;

      if (ast_strlen_zero(endpoint->media.rtp.dtls_cfg.certfile)) {
         /* If no certificate has been specified, try to automatically create one */
         endpoint->media.rtp.dtls_cfg.ephemeral_cert = 1;
      }
   }

   return 0;
}

const char *ast_sip_get_device_state(const struct ast_sip_endpoint *endpoint)
{
   char device[MAX_OBJECT_FIELD];

   snprintf(device, MAX_OBJECT_FIELD, "PJSIP/%s", ast_sorcery_object_get_id(endpoint));
   return ast_devstate2str(ast_device_state(device));
}

struct ast_endpoint_snapshot *ast_sip_get_endpoint_snapshot(
   const struct ast_sip_endpoint *endpoint)
{
   return ast_endpoint_latest_snapshot(
      ast_endpoint_get_tech(endpoint->persistent),
      ast_endpoint_get_resource(endpoint->persistent));
}

int ast_sip_for_each_channel_snapshot(
   const struct ast_endpoint_snapshot *endpoint_snapshot,
   ao2_callback_fn on_channel_snapshot, void *arg)
{
   int num, num_channels = endpoint_snapshot->num_channels;

   if (!on_channel_snapshot || !num_channels) {
      return 0;
   }

   for (num = 0; num < num_channels; ++num) {
      RAII_VAR(struct ast_channel_snapshot *, snapshot, NULL, ao2_cleanup);
      int res;

      snapshot = ast_channel_snapshot_get_latest(endpoint_snapshot->channel_ids[num]);
      if (!snapshot) {
         continue;
      }

      res = on_channel_snapshot(snapshot, arg, 0);
      if (res) {
         return -1;
      }
   }
   return 0;
}

int ast_sip_for_each_channel(
   const struct ast_sip_endpoint *endpoint,
   ao2_callback_fn on_channel_snapshot, void *arg)
{
   RAII_VAR(struct ast_endpoint_snapshot *, endpoint_snapshot, ast_sip_get_endpoint_snapshot(endpoint), ao2_cleanup);
   return ast_sip_for_each_channel_snapshot(endpoint_snapshot, on_channel_snapshot, arg);
}

static int active_channels_to_str_cb(void *object, void *arg, int flags)
{
   const struct ast_channel_snapshot *snapshot = object;
   struct ast_str **buf = arg;
   ast_str_append(buf, 0, "%s,", snapshot->base->name);
   return 0;
}

static void active_channels_to_str(const struct ast_sip_endpoint *endpoint,
               struct ast_str **str)
{

   RAII_VAR(struct ast_endpoint_snapshot *, endpoint_snapshot,
       ast_sip_get_endpoint_snapshot(endpoint), ao2_cleanup);

   if (endpoint_snapshot) {
      return;
   }

   ast_sip_for_each_channel_snapshot(endpoint_snapshot,
                 active_channels_to_str_cb, str);
   ast_str_truncate(*str, -1);
}

#define AMI_DEFAULT_STR_SIZE 512

struct ast_str *ast_sip_create_ami_event(const char *event, struct ast_sip_ami *ami)
{
   struct ast_str *buf = ast_str_create(AMI_DEFAULT_STR_SIZE);

   if (!(buf)) {
      astman_send_error_va(ami->s, ami->m, "Unable create event "
                 "for %s\n", event);
      return NULL;
   }

   ast_str_set(&buf, 0, "Event: %s\r\n", event);
   if (!ast_strlen_zero(ami->action_id)) {
      ast_str_append(&buf, 0, "ActionID: %s\r\n", ami->action_id);
   }
   return buf;
}

static void sip_sorcery_object_ami_set_type_name(const void *obj, struct ast_str **buf)
{
   ast_str_append(buf, 0, "ObjectType: %s\r\n",
             ast_sorcery_object_get_type(obj));
   ast_str_append(buf, 0, "ObjectName: %s\r\n",
             ast_sorcery_object_get_id(obj));
}

int ast_sip_sorcery_object_to_ami(const void *obj, struct ast_str **buf)
{
   RAII_VAR(struct ast_variable *, objset, ast_sorcery_objectset_create2(
          ast_sip_get_sorcery(), obj, AST_HANDLER_ONLY_STRING), ast_variables_destroy);
   struct ast_variable *i;

   if (!objset) {
      return -1;
   }

   sip_sorcery_object_ami_set_type_name(obj, buf);

   for (i = objset; i; i = i->next) {
      RAII_VAR(char *, camel, ast_to_camel_case(i->name), ast_free);
      ast_str_append(buf, 0, "%s: %s\r\n", camel, i->value);
   }

   return 0;
}

static int sip_endpoints_aors_ami(void *obj, void *arg, int flags)
{
   struct ast_sip_aor *aor = obj;
   struct ast_str **buf = arg;

   ast_str_append(buf, 0, "Contacts: ");
   ast_sip_for_each_contact(aor, ast_sip_contact_to_str, arg);
   ast_str_append(buf, 0, "\r\n");

   return 0;
}

static int sip_endpoint_to_ami(const struct ast_sip_endpoint *endpoint,
                struct ast_str **buf)
{
   if (ast_sip_sorcery_object_to_ami(endpoint, buf)) {
      return -1;
   }

   ast_str_append(buf, 0, "DeviceState: %s\r\n",
             ast_sip_get_device_state(endpoint));

   ast_str_append(buf, 0, "ActiveChannels: ");
   active_channels_to_str(endpoint, buf);
   ast_str_append(buf, 0, "\r\n");

   return 0;
}

static int format_ami_endpoint(const struct ast_sip_endpoint *endpoint,
                struct ast_sip_ami *ami)
{
   RAII_VAR(struct ast_str *, buf,
       ast_sip_create_ami_event("EndpointDetail", ami), ast_free);

   if (!buf) {
      return -1;
   }

   sip_endpoint_to_ami(endpoint, &buf);
   astman_append(ami->s, "%s\r\n", ast_str_buffer(buf));
   return 0;
}

#define AMI_SHOW_ENDPOINTS "PJSIPShowEndpoints"
#define AMI_SHOW_ENDPOINT "PJSIPShowEndpoint"

static int ami_show_endpoint(struct mansession *s, const struct message *m)
{
   struct ast_sip_ami ami = { .s = s, .m = m, .action_id = astman_get_header(m, "ActionID"),
      .count = 0, };
   RAII_VAR(struct ast_sip_endpoint *, endpoint, NULL, ao2_cleanup);
   const char *endpoint_name = astman_get_header(m, "Endpoint");
   int count = 0;

   if (ast_strlen_zero(endpoint_name)) {
      astman_send_error_va(s, m, "%s requires an endpoint name\n",
         AMI_SHOW_ENDPOINT);
      return 0;
   }

   if (!strncasecmp(endpoint_name, "pjsip/", 6)) {
      endpoint_name += 6;
   }

   if (!(endpoint = ast_sorcery_retrieve_by_id(
            ast_sip_get_sorcery(), "endpoint", endpoint_name))) {
      astman_send_error_va(s, m, "Unable to retrieve endpoint %s\n",
         endpoint_name);
      return 0;
   }

   astman_send_listack(s, m, "Following are Events for each object associated with the Endpoint",
      "start");

   /* the endpoint detail needs to always come first so apply as such */
   if (format_ami_endpoint(endpoint, &ami) ||
       ast_sip_format_endpoint_ami(endpoint, &ami, &count)) {
      astman_send_error_va(s, m, "Unable to format endpoint %s\n",
         endpoint_name);
   }

   astman_send_list_complete_start(s, m, "EndpointDetailComplete", ami.count + 1);
   astman_send_list_complete_end(s);

   return 0;
}

static int format_str_append_auth(const struct ast_sip_auth_vector *auths,
              struct ast_str **buf)
{
   char *str = NULL;
   if (ast_sip_auths_to_str(auths, &str)) {
      return -1;
   }
   ast_str_append(buf, 0, "%s", str ? str : "");
   ast_free(str);
   return 0;
}

static int format_ami_endpoints(void *obj, void *arg, int flags)
{

   struct ast_sip_endpoint *endpoint = obj;
   struct ast_sip_ami *ami = arg;
   RAII_VAR(struct ast_str *, buf,
       ast_sip_create_ami_event("EndpointList", ami), ast_free);

   if (!buf) {
      return CMP_STOP;
   }

   sip_sorcery_object_ami_set_type_name(endpoint, &buf);
   ast_str_append(&buf, 0, "Transport: %s\r\n",
             endpoint->transport);
   ast_str_append(&buf, 0, "Aor: %s\r\n",
             endpoint->aors);

   ast_str_append(&buf, 0, "Auths: ");
   format_str_append_auth(&endpoint->inbound_auths, &buf);
   ast_str_append(&buf, 0, "\r\n");

   ast_str_append(&buf, 0, "OutboundAuths: ");
   format_str_append_auth(&endpoint->outbound_auths, &buf);
   ast_str_append(&buf, 0, "\r\n");

   ast_sip_for_each_aor(endpoint->aors,
              sip_endpoints_aors_ami, &buf);

   ast_str_append(&buf, 0, "DeviceState: %s\r\n",
             ast_sip_get_device_state(endpoint));

   ast_str_append(&buf, 0, "ActiveChannels: ");
   active_channels_to_str(endpoint, &buf);
   ast_str_append(&buf, 0, "\r\n");

   astman_append(ami->s, "%s\r\n", ast_str_buffer(buf));
   return 0;
}

static int ami_show_endpoints(struct mansession *s, const struct message *m)
{
   struct ast_sip_ami ami = { .s = s, .m = m, .action_id = astman_get_header(m, "ActionID"), };
   RAII_VAR(struct ao2_container *, endpoints, NULL, ao2_cleanup);
   int num;

   endpoints = ast_sip_get_endpoints();
   if (!endpoints) {
      astman_send_error(s, m, "Could not get endpoints\n");
      return 0;
   }

   if (!(num = ao2_container_count(endpoints))) {
      astman_send_error(s, m, "No endpoints found\n");
      return 0;
   }

   astman_send_listack(s, m, "A listing of Endpoints follows, presented as EndpointList events",
      "start");

   ao2_callback(endpoints, OBJ_NODATA, format_ami_endpoints, &ami);

   astman_send_list_complete_start(s, m, "EndpointListComplete", num);
   astman_send_list_complete_end(s);
   return 0;
}

static struct ao2_container *cli_endpoint_get_container(const char *regex)
{
   RAII_VAR(struct ao2_container *, container, NULL, ao2_cleanup);
   struct ao2_container *s_container;

   container = ast_sorcery_retrieve_by_regex(sip_sorcery, "endpoint", regex);
   if (!container) {
      return NULL;
   }

   s_container = ao2_container_alloc_list(AO2_ALLOC_OPT_LOCK_NOLOCK, 0,
      (void *)ast_sorcery_object_id_sort, (void *)ast_sorcery_object_id_compare);
   if (!s_container) {
      return NULL;
   }

   if (ao2_container_dup(s_container, container, 0)) {
      ao2_ref(s_container, -1);
      return NULL;
   }

   return s_container;
}

static int cli_endpoint_iterate(void *obj, ao2_callback_fn callback, void *args)
{
   ao2_callback(obj, OBJ_NODATA, callback, args);

   return 0;
}

static void *cli_endpoint_retrieve_by_id(const char *id)
{
   return ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "endpoint", id);
}

static void cli_endpoint_print_child_header(char *type, struct ast_sip_cli_context *context)
{
   RAII_VAR(struct ast_sip_cli_formatter_entry *, formatter_entry, NULL, ao2_cleanup);

   formatter_entry = ast_sip_lookup_cli_formatter(type);
   if (formatter_entry) {
      formatter_entry->print_header(NULL, context, 0);
   }
}

static int cli_endpoint_print_header(void *obj, void *arg, int flags)
{
   struct ast_sip_cli_context *context = arg;

   ast_assert(context->output_buffer != NULL);

   ast_str_append(&context->output_buffer, 0,
         " Endpoint:  <Endpoint/CID.....................................>  <State.....>  <Channels.>\n");

   if (context->recurse) {
      context->indent_level++;
      cli_endpoint_print_child_header("auth", context);
      cli_endpoint_print_child_header("aor", context);
      cli_endpoint_print_child_header("transport", context);
      cli_endpoint_print_child_header("identify", context);
      cli_endpoint_print_child_header("channel", context);
      context->indent_level--;
   }

   return 0;
}

static void cli_endpoint_print_child_body(char *type, const void *obj, struct ast_sip_cli_context *context)
{
   RAII_VAR(struct ast_sip_cli_formatter_entry *, formatter_entry, NULL, ao2_cleanup);

   formatter_entry = ast_sip_lookup_cli_formatter(type);
   if (formatter_entry) {
      formatter_entry->iterate((void *)obj, formatter_entry->print_body, context);
   }
}

static int cli_endpoint_print_body(void *obj, void *arg, int flags)
{
   struct ast_sip_endpoint *endpoint = obj;
   RAII_VAR(struct ast_endpoint_snapshot *, endpoint_snapshot, ast_sip_get_endpoint_snapshot(endpoint), ao2_cleanup);
   struct ast_sip_cli_context *context = arg;
   const char *id = ast_sorcery_object_get_id(endpoint);
   char *print_name = NULL;
   int print_name_len;
   char *number = S_COR(endpoint->id.self.number.valid,
      endpoint->id.self.number.str, NULL);
   int indent;
   int flexwidth;

   ast_assert(context->output_buffer != NULL);

   if (number) {
      print_name_len = strlen(id) + strlen(number) + 2;
      print_name = ast_alloca(print_name_len);
      snprintf(print_name, print_name_len, "%s/%s", id, number);
   }

   indent = CLI_INDENT_TO_SPACES(context->indent_level);
   flexwidth = CLI_LAST_TABSTOP - indent - 2;

   ast_str_append(&context->output_buffer, 0, "%*s:  %-*.*s  %-12.12s  %d of %.0f\n",
      indent, "Endpoint",
      flexwidth, flexwidth, print_name ? print_name : id,
      ast_sip_get_device_state(endpoint),
      endpoint_snapshot->num_channels,
      (double) endpoint->devicestate_busy_at ? endpoint->devicestate_busy_at :
                                          INFINITY
                                          );

   if (context->recurse) {
      context->indent_level++;

      context->auth_direction = "Out";
      cli_endpoint_print_child_body("auth", &endpoint->outbound_auths, context);
      context->auth_direction = "In";
      cli_endpoint_print_child_body("auth", &endpoint->inbound_auths, context);

      cli_endpoint_print_child_body("aor", endpoint->aors, context);
      cli_endpoint_print_child_body("transport", endpoint, context);
      cli_endpoint_print_child_body("identify", endpoint, context);
      cli_endpoint_print_child_body("channel", endpoint, context);

      context->indent_level--;

      if (context->indent_level == 0) {
         ast_str_append(&context->output_buffer, 0, "\n");
      }
   }

   if (context->show_details || (context->show_details_only_level_0 && context->indent_level == 0)) {
      ast_str_append(&context->output_buffer, 0, "\n");
      ast_sip_cli_print_sorcery_objectset(endpoint, context, 0);
   }

   return 0;
}

static struct ast_cli_entry cli_commands[] = {
   AST_CLI_DEFINE(ast_sip_cli_traverse_objects, "List PJSIP Endpoints",
      .command = "pjsip list endpoints",
      .usage = "Usage: pjsip list endpoints [ like <pattern> ]\n"
            "       List the configured PJSIP endpoints\n"
            "       Optional regular expression pattern is used to filter the list.\n"),
   AST_CLI_DEFINE(ast_sip_cli_traverse_objects, "Show PJSIP Endpoints",
      .command = "pjsip show endpoints",
      .usage = "Usage: pjsip show endpoints [ like <pattern> ]\n"
            "       List(detailed) the configured PJSIP endpoints\n"
            "       Optional regular expression pattern is used to filter the list.\n"),
   AST_CLI_DEFINE(ast_sip_cli_traverse_objects, "Show PJSIP Endpoint",
      .command = "pjsip show endpoint",
      .usage = "Usage: pjsip show endpoint <id>\n"
             "       Show the configured PJSIP endpoint\n"),
};

struct ast_sip_cli_formatter_entry *channel_formatter;
struct ast_sip_cli_formatter_entry *endpoint_formatter;

static void load_all_endpoints(void)
{
   struct ao2_container *endpoints;

   endpoints = ast_sorcery_retrieve_by_fields(sip_sorcery, "endpoint", AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);
   ao2_cleanup(endpoints);
}

static void acl_change_stasis_cb(void *data, struct stasis_subscription *sub,
   struct stasis_message *message)
{
   if (stasis_message_type(message) != ast_named_acl_change_type()) {
      return;
   }

   ast_sorcery_force_reload_object(sip_sorcery, "endpoint");
}

int ast_res_pjsip_initialize_configuration(void)
{
   if (ast_manager_register_xml(AMI_SHOW_ENDPOINTS, EVENT_FLAG_SYSTEM, ami_show_endpoints) ||
       ast_manager_register_xml(AMI_SHOW_ENDPOINT, EVENT_FLAG_SYSTEM, ami_show_endpoint)) {
      return -1;
   }

   persistent_endpoints = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_MUTEX, 0,
      PERSISTENT_BUCKETS, persistent_endpoint_hash, NULL, persistent_endpoint_cmp);
   if (!persistent_endpoints) {
      return -1;
   }

   if (!(sip_sorcery = ast_sorcery_open())) {
      ast_log(LOG_ERROR, "Failed to open SIP sorcery failed to open\n");
      return -1;
   }

   ast_sip_initialize_cli();

   if (ast_sip_initialize_sorcery_auth()) {
      ast_log(LOG_ERROR, "Failed to register SIP authentication support\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }

   ast_sorcery_apply_default(sip_sorcery, "endpoint", "config", "pjsip.conf,criteria=type=endpoint");
   ast_sorcery_apply_default(sip_sorcery, "nat_hook", "memory", NULL);

   if (ast_sorcery_object_register(sip_sorcery, "endpoint", ast_sip_endpoint_alloc, NULL, sip_endpoint_apply_handler)) {
      ast_log(LOG_ERROR, "Failed to register SIP endpoint object with sorcery\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }

   if (ast_sorcery_internal_object_register(sip_sorcery, "nat_hook", sip_nat_hook_alloc, NULL, NULL)) {
      ast_log(LOG_ERROR, "Failed to register nat_hook\n");
   }

   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "type", "", OPT_NOOP_T, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "context", "default", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, context));
   ast_sorcery_object_field_register_alias(sip_sorcery, "endpoint", "disallow", "", OPT_CODEC_T, 0, FLDSET(struct ast_sip_endpoint, media.codecs));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow", "", OPT_CODEC_T, 1, FLDSET(struct ast_sip_endpoint, media.codecs));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtmf_mode", "rfc4733", dtmf_handler, dtmf_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_ipv6", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.ipv6));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_symmetric", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.symmetric));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "ice_support", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.ice_support));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "use_ptime", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.use_ptime));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "force_rport", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, nat.force_rport));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rewrite_contact", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, nat.rewrite_contact));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "transport", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, transport));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "outbound_proxy", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, outbound_proxy));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "moh_suggest", "default", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, mohsuggest));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "100rel", "yes", prack_handler, prack_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "timers", "yes", timers_handler, timers_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "timers_min_se", "90", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, extensions.timer.min_se));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "timers_sess_expires", "1800", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, extensions.timer.sess_expires));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "auth", "", inbound_auth_handler, inbound_auths_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "outbound_auth", "", outbound_auth_handler, outbound_auths_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "aors", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, aors));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "media_address", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, media.address));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "bind_rtp_to_media_address", "no", OPT_BOOL_T, 1, STRFLDSET(struct ast_sip_endpoint, media.bind_rtp_to_media_address));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "identify_by", "username,ip", ident_handler, ident_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "direct_media", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.direct_media.enabled));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "direct_media_method", "invite", direct_media_method_handler, direct_media_method_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "trust_connected_line", "yes", OPT_YESNO_T, 1, FLDSET(struct ast_sip_endpoint, id.trust_connected_line));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "send_connected_line", "yes", OPT_YESNO_T, 1, FLDSET(struct ast_sip_endpoint, id.send_connected_line));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "connected_line_method", "invite", connected_line_method_handler, connected_line_method_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "direct_media_glare_mitigation", "none", direct_media_glare_mitigation_handler, direct_media_glare_mitigation_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "disable_direct_media_on_nat", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.direct_media.disable_on_nat));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid", "", caller_id_handler, caller_id_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid_privacy", "allowed_not_screened", caller_id_privacy_handler, caller_id_privacy_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "callerid_tag", "", caller_id_tag_handler, caller_id_tag_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "trust_id_inbound", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.trust_inbound));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "trust_id_outbound", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.trust_outbound));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "send_pai", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.send_pai));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "send_rpid", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.send_rpid));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rpid_immediate", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.rpid_immediate));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "send_diversion", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.send_diversion));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "send_history_info", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, id.send_history_info));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "mailboxes", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, subscription.mwi.mailboxes));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "voicemail_extension", "", voicemail_extension_handler, voicemail_extension_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "aggregate_mwi", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, subscription.mwi.aggregate));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "mwi_subscribe_replaces_unsolicited", "no", OPT_YESNO_T, 1, FLDSET(struct ast_sip_endpoint, subscription.mwi.subscribe_replaces_unsolicited));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "media_encryption", "no", media_encryption_handler, media_encryption_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "use_avpf", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.use_avpf));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "force_avp", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.force_avp));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "media_use_received_transport", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.use_received_transport));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_keepalive", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.rtp.keepalive));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_timeout", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.rtp.timeout));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_timeout_hold", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.rtp.timeout_hold));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "one_touch_recording", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, info.recording.enabled));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "inband_progress", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, inband_progress));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "call_group", "", group_handler, callgroup_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "pickup_group", "", group_handler, pickupgroup_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "named_call_group", "", named_groups_handler, named_callgroups_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "named_pickup_group", "", named_groups_handler, named_pickupgroups_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "device_state_busy_at", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, devicestate_busy_at));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "t38_udptl", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.t38.enabled));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "t38_udptl_ec", "none", t38udptl_ec_handler, t38udptl_ec_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "t38_udptl_maxdatagram", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.t38.maxdatagram));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "fax_detect", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, faxdetect));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "fax_detect_timeout", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, faxdetect_timeout));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "t38_udptl_nat", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.t38.nat));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "t38_udptl_ipv6", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.t38.ipv6));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "tone_zone", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, zone));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "language", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, language));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "record_on_feature", "automixmon", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, info.recording.onfeature));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "record_off_feature", "automixmon", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, info.recording.offfeature));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow_transfer", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, allowtransfer));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "user_eq_phone", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, usereqphone));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "moh_passthrough", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, moh_passthrough));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "sdp_owner", "-", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, media.sdpowner));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "sdp_session", "Asterisk", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, media.sdpsession));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "tos_audio", "0", tos_handler, tos_audio_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "tos_video", "0", tos_handler, tos_video_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "cos_audio", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.cos_audio));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "cos_video", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.cos_video));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow_subscribe", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, subscription.allow));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "sub_min_expiry", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, subscription.minexpiry));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "from_user", "", from_user_handler, from_user_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "from_domain", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, fromdomain));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "mwi_from_user", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, subscription.mwi.fromuser));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_engine", "asterisk", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, media.rtp.engine));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_verify", "no", dtls_handler, dtlsverify_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_rekey", "0", dtls_handler, dtlsrekey_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_auto_generate_cert", "no", dtls_handler, dtlsautogeneratecert_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_cert_file", "", dtls_handler, dtlscertfile_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_private_key", "", dtls_handler, dtlsprivatekey_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_cipher", "", dtls_handler, dtlscipher_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_ca_file", "", dtls_handler, dtlscafile_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_ca_path", "", dtls_handler, dtlscapath_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_setup", "", dtls_handler, dtlssetup_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "dtls_fingerprint", "", dtls_handler, dtlsfingerprint_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "srtp_tag_32", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.srtp_tag_32));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "media_encryption_optimistic", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.encryption_optimistic));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "g726_non_standard", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.g726_non_standard));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "redirect_method", "user", redirect_handler, NULL, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "set_var", "", set_var_handler, set_var_to_str, set_var_to_vl, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "message_context", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, message_context));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "accountcode", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, accountcode));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "deny", "", endpoint_acl_handler, NULL, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "permit", "", endpoint_acl_handler, NULL, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "acl", "", endpoint_acl_handler, acl_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_deny", "", endpoint_acl_handler, NULL, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_permit", "", endpoint_acl_handler, NULL, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_acl", "", endpoint_acl_handler, contact_acl_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "subscribe_context", "", OPT_CHAR_ARRAY_T, 0, CHARFLDSET(struct ast_sip_endpoint, subscription.context));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_user", "", contact_user_handler, contact_user_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "preferred_codec_only", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, preferred_codec_only));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "asymmetric_rtp_codec", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, asymmetric_rtp_codec));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtcp_mux", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtcp_mux));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow_overlap", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, allow_overlap));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "refer_blind_progress", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, refer_blind_progress));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "notify_early_inuse_ringing", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, notify_early_inuse_ringing));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "max_audio_streams", "1", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.max_audio_streams));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "max_video_streams", "1", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.max_video_streams));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "bundle", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.bundle));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "webrtc", "no", OPT_YESNO_T, 1, FLDSET(struct ast_sip_endpoint, media.webrtc));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "incoming_mwi_mailbox", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, incoming_mwi_mailbox));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "follow_early_media_fork", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.follow_early_media_fork));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "accept_multiple_sdp_answers", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, media.rtp.accept_multiple_sdp_answers));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "suppress_q850_reason_headers", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, suppress_q850_reason_headers));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "ignore_183_without_sdp", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, ignore_183_without_sdp));
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "incoming_call_offer_pref", "local",
      call_offer_pref_handler, incoming_call_offer_pref_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "outgoing_call_offer_pref", "remote_merge",
      call_offer_pref_handler, outgoing_call_offer_pref_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "codec_prefs_incoming_offer",
      "prefer: pending, operation: intersect, keep: all, transcode: allow",
      codec_prefs_handler, incoming_offer_codec_prefs_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "codec_prefs_outgoing_offer",
      "prefer: pending, operation: union, keep: all, transcode: allow",
      codec_prefs_handler, outgoing_offer_codec_prefs_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "codec_prefs_incoming_answer",
      "prefer: pending, operation: intersect, keep: all",
      codec_prefs_handler, incoming_answer_codec_prefs_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "codec_prefs_outgoing_answer",
      "prefer: pending, operation: intersect, keep: all",
      codec_prefs_handler, outgoing_answer_codec_prefs_to_str, NULL, 0, 0);
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "stir_shaken", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, stir_shaken));
   ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow_unauthenticated_options", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, allow_unauthenticated_options));

   if (ast_sip_initialize_sorcery_transport()) {
      ast_log(LOG_ERROR, "Failed to register SIP transport support with sorcery\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }

   if (ast_sip_initialize_sorcery_location()) {
      ast_log(LOG_ERROR, "Failed to register SIP location support with sorcery\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }

   ast_sorcery_observer_add(sip_sorcery, "endpoint", &endpoint_observers);

   if (ast_sip_initialize_sorcery_domain_alias()) {
      ast_log(LOG_ERROR, "Failed to register SIP domain aliases support with sorcery\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }

   if (ast_sip_initialize_sorcery_global()) {
      ast_log(LOG_ERROR, "Failed to register SIP Global support\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }

   endpoint_formatter = ao2_alloc(sizeof(struct ast_sip_cli_formatter_entry), NULL);
   if (!endpoint_formatter) {
      ast_log(LOG_ERROR, "Unable to allocate memory for endpoint_formatter\n");
      ast_sorcery_unref(sip_sorcery);
      sip_sorcery = NULL;
      return -1;
   }
   endpoint_formatter->name = "endpoint";
   endpoint_formatter->print_header = cli_endpoint_print_header;
   endpoint_formatter->print_body = cli_endpoint_print_body;
   endpoint_formatter->get_container = cli_endpoint_get_container;
   endpoint_formatter->iterate = cli_endpoint_iterate;
   endpoint_formatter->retrieve_by_id = cli_endpoint_retrieve_by_id;
   endpoint_formatter->get_id = ast_sorcery_object_get_id;

   ast_sip_register_cli_formatter(endpoint_formatter);
   ast_cli_register_multiple(cli_commands, ARRAY_LEN(cli_commands));

   ast_sorcery_load(sip_sorcery);

   load_all_endpoints();

   ast_sip_location_prune_boot_contacts();

   acl_change_sub = stasis_subscribe(ast_security_topic(), acl_change_stasis_cb, NULL);
   stasis_subscription_accept_message_type(acl_change_sub, ast_named_acl_change_type());
   stasis_subscription_set_filter(acl_change_sub, STASIS_SUBSCRIPTION_FILTER_SELECTIVE);

   return 0;
}

void ast_res_pjsip_destroy_configuration(void)
{
   if (!sip_sorcery) {
      return;
   }

   acl_change_sub = stasis_unsubscribe_and_join(acl_change_sub);
   ast_sip_destroy_sorcery_global();
   ast_sip_destroy_sorcery_location();
   ast_sip_destroy_sorcery_auth();
   ast_sip_destroy_sorcery_transport();
   ast_sorcery_unref(sip_sorcery);
   sip_sorcery = NULL;
   ast_manager_unregister(AMI_SHOW_ENDPOINT);
   ast_manager_unregister(AMI_SHOW_ENDPOINTS);
   ast_cli_unregister_multiple(cli_commands, ARRAY_LEN(cli_commands));
   ast_sip_unregister_cli_formatter(endpoint_formatter);
   ast_sip_destroy_cli();
   ao2_cleanup(persistent_endpoints);
   persistent_endpoints = NULL;
}

int ast_res_pjsip_reload_configuration(void)
{
   if (sip_sorcery) {
      ast_sorcery_reload(sip_sorcery);
   }
   return 0;
}

static void subscription_configuration_destroy(struct ast_sip_endpoint_subscription_configuration *subscription)
{
   ast_string_field_free_memory(&subscription->mwi);
   ast_free(subscription->mwi.voicemail_extension);
}

static void info_configuration_destroy(struct ast_sip_endpoint_info_configuration *info)
{
   ast_string_field_free_memory(&info->recording);
}

static void media_configuration_destroy(struct ast_sip_endpoint_media_configuration *media)
{
   ast_rtp_dtls_cfg_free(&media->rtp.dtls_cfg);
   ast_string_field_free_memory(&media->rtp);
   ast_string_field_free_memory(media);
}

static void endpoint_destructor(void* obj)
{
   struct ast_sip_endpoint *endpoint = obj;

   ast_string_field_free_memory(endpoint);

   ao2_cleanup(endpoint->media.codecs);
   ast_stream_topology_free(endpoint->media.topology);
   subscription_configuration_destroy(&endpoint->subscription);
   info_configuration_destroy(&endpoint->info);
   media_configuration_destroy(&endpoint->media);
   ast_sip_auth_vector_destroy(&endpoint->inbound_auths);
   ast_sip_auth_vector_destroy(&endpoint->outbound_auths);
   ast_party_id_free(&endpoint->id.self);
   endpoint->pickup.named_callgroups = ast_unref_namedgroups(endpoint->pickup.named_callgroups);
   endpoint->pickup.named_pickupgroups = ast_unref_namedgroups(endpoint->pickup.named_pickupgroups);
   ao2_cleanup(endpoint->persistent);
   ast_variables_destroy(endpoint->channel_vars);
   AST_VECTOR_FREE(&endpoint->ident_method_order);
   ast_free(endpoint->contact_user);
   ast_free_acl_list(endpoint->contact_acl);
   ast_free_acl_list(endpoint->acl);
}

static int init_subscription_configuration(struct ast_sip_endpoint_subscription_configuration *subscription)
{
   return ast_string_field_init(&subscription->mwi, 64);
}

static int init_info_configuration(struct ast_sip_endpoint_info_configuration *info)
{
   return ast_string_field_init(&info->recording, 32);
}

static int init_media_configuration(struct ast_sip_endpoint_media_configuration *media)
{
   return ast_string_field_init(media, 64) || ast_string_field_init(&media->rtp, 32);
}

void *ast_sip_endpoint_alloc(const char *name)
{
   struct ast_sip_endpoint *endpoint = ast_sorcery_generic_alloc(sizeof(*endpoint), endpoint_destructor);
   if (!endpoint) {
      return NULL;
   }
   if (ast_string_field_init(endpoint, 64)) {
      ao2_cleanup(endpoint);
      return NULL;
   }

   if (!(endpoint->media.codecs = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
      ao2_cleanup(endpoint);
      return NULL;
   }
   if (init_subscription_configuration(&endpoint->subscription)) {
      ao2_cleanup(endpoint);
      return NULL;
   }
   if (init_info_configuration(&endpoint->info)) {
      ao2_cleanup(endpoint);
      return NULL;
   }
   if (init_media_configuration(&endpoint->media)) {
      ao2_cleanup(endpoint);
      return NULL;
   }

   ast_party_id_init(&endpoint->id.self);
   endpoint->id.self.tag = ast_strdup("");

   if (AST_VECTOR_INIT(&endpoint->ident_method_order, 1)) {
      return NULL;
   }

   return endpoint;
}

struct ao2_container *ast_sip_get_endpoints(void)
{
   struct ao2_container *endpoints;

   endpoints = ast_sorcery_retrieve_by_fields(sip_sorcery, "endpoint", AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);

   return endpoints;
}

struct ast_sip_endpoint *ast_sip_default_outbound_endpoint(void)
{
   RAII_VAR(char *, name, ast_sip_global_default_outbound_endpoint(), ast_free);
   return ast_strlen_zero(name) ? NULL : ast_sorcery_retrieve_by_id(
      sip_sorcery, "endpoint", name);
}

int ast_sip_retrieve_auths(const struct ast_sip_auth_vector *auths, struct ast_sip_auth **out)
{
   int i;

   for (i = 0; i < AST_VECTOR_SIZE(auths); ++i) {
      /* Using AST_VECTOR_GET is safe since the vector is immutable */
      const char *name = AST_VECTOR_GET(auths, i);
      out[i] = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), SIP_SORCERY_AUTH_TYPE, name);
      if (!out[i]) {
         ast_log(LOG_NOTICE, "Couldn't find auth '%s'. Cannot authenticate\n", name);
         return -1;
      }
   }

   return 0;
}

void ast_sip_cleanup_auths(struct ast_sip_auth *auths[], size_t num_auths)
{
   int i;
   for (i = 0; i < num_auths; ++i) {
      ao2_cleanup(auths[i]);
   }
}

int ast_sip_retrieve_auths_vector(const struct ast_sip_auth_vector *auth_ids,
   struct ast_sip_auth_objects_vector *auth_objects)
{
   int i;

   for (i = 0; i < AST_VECTOR_SIZE(auth_ids); ++i) {
      /* Using AST_VECTOR_GET is safe since the vector is immutable */
      const char *name = AST_VECTOR_GET(auth_ids, i);
      struct ast_sip_auth *auth_object = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), SIP_SORCERY_AUTH_TYPE, name);
      if (!auth_object) {
         ast_log(LOG_WARNING, "Auth object '%s' could not be found\n", name);
      } else {
         AST_VECTOR_APPEND(auth_objects, auth_object);
      }
   }

   return AST_VECTOR_SIZE(auth_objects) == AST_VECTOR_SIZE(auth_ids) ? 0 : -1;
}

struct ast_sorcery *ast_sip_get_sorcery(void)
{
   return sip_sorcery;
}