res/res_pjsip/config_global.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2013, Digium, Inc.
   5  *
   6  * Mark Michelson <mmichelson@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 #include "asterisk.h"
  20
  21 #include <pjsip.h>
  22 #include <pjlib.h>
  23
  24 #include "asterisk/res_pjsip.h"
  25 #include "include/res_pjsip_private.h"
  26 #include "asterisk/sorcery.h"
  27 #include "asterisk/ast_version.h"
  28
  29 #define DEFAULT_MAX_FORWARDS 70
  30 #define DEFAULT_USERAGENT_PREFIX "Asterisk PBX"
  31 #define DEFAULT_OUTBOUND_ENDPOINT "default_outbound_endpoint"
  32
  33 static char default_useragent[128];
  34
  35 struct global_config {
  36         SORCERY_OBJECT(details);
  37         AST_DECLARE_STRING_FIELDS(
  38                 AST_STRING_FIELD(useragent);
  39                 AST_STRING_FIELD(default_outbound_endpoint);
  40                 /*! Debug logging yes|no|host */
  41                 AST_STRING_FIELD(debug);
  42         );
  43         /* Value to put in Max-Forwards header */
  44         unsigned int max_forwards;
  45 };
  46
  47 static void global_destructor(void *obj)
  48 {
  49         struct global_config *cfg = obj;
  50
  51         ast_string_field_free_memory(cfg);
  52 }
  53
  54 static void *global_alloc(const char *name)
  55 {
  56         struct global_config *cfg = ast_sorcery_generic_alloc(sizeof(*cfg), global_destructor);
  57
  58         if (!cfg || ast_string_field_init(cfg, 80)) {
  59                 return NULL;
  60         }
  61
  62         return cfg;
  63 }
  64
  65 static int global_apply(const struct ast_sorcery *sorcery, void *obj)
  66 {
  67         struct global_config *cfg = obj;
  68         char max_forwards[10];
  69
  70         snprintf(max_forwards, sizeof(max_forwards), "%u", cfg->max_forwards);
  71
  72         ast_sip_add_global_request_header("Max-Forwards", max_forwards, 1);
  73         ast_sip_add_global_request_header("User-Agent", cfg->useragent, 1);
  74         ast_sip_add_global_response_header("Server", cfg->useragent, 1);
  75         return 0;
  76 }
  77
  78 static struct global_config *get_global_cfg(void)
  79 {
  80         RAII_VAR(struct ao2_container *, globals, ast_sorcery_retrieve_by_fields(
  81                          ast_sip_get_sorcery(), "global", AST_RETRIEVE_FLAG_MULTIPLE,
  82                          NULL), ao2_cleanup);
  83
  84         if (!globals) {
  85                 return NULL;
  86         }
  87
  88         return ao2_find(globals, NULL, 0);
  89 }
  90
  91 char *ast_sip_global_default_outbound_endpoint(void)
  92 {
  93         RAII_VAR(struct global_config *, cfg, get_global_cfg(), ao2_cleanup);
  94
  95         if (!cfg) {
  96                 return NULL;
  97         }
  98
  99         return ast_strdup(cfg->default_outbound_endpoint);
 100 }
 101
 102 char *ast_sip_get_debug(void)
 103 {
 104         char *res;
 105         struct global_config *cfg = get_global_cfg();
 106
 107         if (!cfg) {
 108                 return ast_strdup("no");
 109         }
 110
 111         res = ast_strdup(cfg->debug);
 112         ao2_ref(cfg, -1);
 113
 114         return res;
 115 }
 116
 117 int ast_sip_initialize_sorcery_global(void)
 118 {
 119         struct ast_sorcery *sorcery = ast_sip_get_sorcery();
 120
 121         snprintf(default_useragent, sizeof(default_useragent), "%s %s", DEFAULT_USERAGENT_PREFIX, ast_get_version());
 122
 123         ast_sorcery_apply_default(sorcery, "global", "config", "pjsip.conf,criteria=type=global");
 124
 125         if (ast_sorcery_object_register(sorcery, "global", global_alloc, NULL, global_apply)) {
 126                 return -1;
 127         }
 128
 129         ast_sorcery_object_field_register(sorcery, "global", "type", "", OPT_NOOP_T, 0, 0);
 130         ast_sorcery_object_field_register(sorcery, "global", "max_forwards", __stringify(DEFAULT_MAX_FORWARDS),
 131                         OPT_UINT_T, 0, FLDSET(struct global_config, max_forwards));
 132         ast_sorcery_object_field_register(sorcery, "global", "user_agent", default_useragent,
 133                         OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, useragent));
 134         ast_sorcery_object_field_register(sorcery, "global", "default_outbound_endpoint", DEFAULT_OUTBOUND_ENDPOINT,
 135                         OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, default_outbound_endpoint));
 136         ast_sorcery_object_field_register(sorcery, "global", "debug", "no",
 137                         OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, debug));
 138
 139         return 0;
 140 }