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         /* The interval at which to send keep alive messages to active connection-oriented transports */
  46         unsigned int keep_alive_interval;
  47 };
  48
  49 static void global_destructor(void *obj)
  50 {
  51         struct global_config *cfg = obj;
  52
  53         ast_string_field_free_memory(cfg);
  54 }
  55
  56 static void *global_alloc(const char *name)
  57 {
  58         struct global_config *cfg = ast_sorcery_generic_alloc(sizeof(*cfg), global_destructor);
  59
  60         if (!cfg || ast_string_field_init(cfg, 80)) {
  61                 return NULL;
  62         }
  63
  64         return cfg;
  65 }
  66
  67 static int global_apply(const struct ast_sorcery *sorcery, void *obj)
  68 {
  69         struct global_config *cfg = obj;
  70         char max_forwards[10];
  71
  72         snprintf(max_forwards, sizeof(max_forwards), "%u", cfg->max_forwards);
  73
  74         ast_sip_add_global_request_header("Max-Forwards", max_forwards, 1);
  75         ast_sip_add_global_request_header("User-Agent", cfg->useragent, 1);
  76         ast_sip_add_global_response_header("Server", cfg->useragent, 1);
  77         return 0;
  78 }
  79
  80 static struct global_config *get_global_cfg(void)
  81 {
  82         RAII_VAR(struct ao2_container *, globals, ast_sorcery_retrieve_by_fields(
  83                          ast_sip_get_sorcery(), "global", AST_RETRIEVE_FLAG_MULTIPLE,
  84                          NULL), ao2_cleanup);
  85
  86         if (!globals) {
  87                 return NULL;
  88         }
  89
  90         return ao2_find(globals, NULL, 0);
  91 }
  92
  93 char *ast_sip_global_default_outbound_endpoint(void)
  94 {
  95         RAII_VAR(struct global_config *, cfg, get_global_cfg(), ao2_cleanup);
  96
  97         if (!cfg) {
  98                 return NULL;
  99         }
 100
 101         return ast_strdup(cfg->default_outbound_endpoint);
 102 }
 103
 104 char *ast_sip_get_debug(void)
 105 {
 106         char *res;
 107         struct global_config *cfg = get_global_cfg();
 108
 109         if (!cfg) {
 110                 return ast_strdup("no");
 111         }
 112
 113         res = ast_strdup(cfg->debug);
 114         ao2_ref(cfg, -1);
 115
 116         return res;
 117 }
 118
 119 unsigned int ast_sip_get_keep_alive_interval(void)
 120 {
 121         unsigned int interval;
 122         struct global_config *cfg = get_global_cfg();
 123
 124         if (!cfg) {
 125                 return 0;
 126         }
 127
 128         interval = cfg->keep_alive_interval;
 129         ao2_ref(cfg, -1);
 130
 131         return interval;
 132 }
 133
 134 int ast_sip_initialize_sorcery_global(void)
 135 {
 136         struct ast_sorcery *sorcery = ast_sip_get_sorcery();
 137
 138         snprintf(default_useragent, sizeof(default_useragent), "%s %s", DEFAULT_USERAGENT_PREFIX, ast_get_version());
 139
 140         ast_sorcery_apply_default(sorcery, "global", "config", "pjsip.conf,criteria=type=global");
 141
 142         if (ast_sorcery_object_register(sorcery, "global", global_alloc, NULL, global_apply)) {
 143                 return -1;
 144         }
 145
 146         ast_sorcery_object_field_register(sorcery, "global", "type", "", OPT_NOOP_T, 0, 0);
 147         ast_sorcery_object_field_register(sorcery, "global", "max_forwards", __stringify(DEFAULT_MAX_FORWARDS),
 148                         OPT_UINT_T, 0, FLDSET(struct global_config, max_forwards));
 149         ast_sorcery_object_field_register(sorcery, "global", "user_agent", default_useragent,
 150                         OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, useragent));
 151         ast_sorcery_object_field_register(sorcery, "global", "default_outbound_endpoint", DEFAULT_OUTBOUND_ENDPOINT,
 152                         OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, default_outbound_endpoint));
 153         ast_sorcery_object_field_register(sorcery, "global", "debug", "no",
 154                         OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, debug));
 155         ast_sorcery_object_field_register(sorcery, "global", "keep_alive_interval", "",
 156                         OPT_UINT_T, 0, FLDSET(struct global_config, keep_alive_interval));
 157
 158         return 0;
 159 }