res/res_pjsip_pidf_digium_body_supplement.c

   1 /*
   2  * asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2014, Digium, Inc.
   5  *
   6  * Kevin Harwell <kharwell@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 /*** MODULEINFO
  20         <depend>pjproject</depend>
  21         <depend>res_pjsip</depend>
  22         <depend>res_pjsip_pubsub</depend>
  23         <support_level>core</support_level>
  24  ***/
  25
  26 #include "asterisk.h"
  27
  28 #include <pjsip.h>
  29 #include <pjsip_simple.h>
  30 #include <pjlib.h>
  31
  32 #include "asterisk/module.h"
  33 #include "asterisk/presencestate.h"
  34 #include "asterisk/res_pjsip.h"
  35 #include "asterisk/res_pjsip_pubsub.h"
  36 #include "asterisk/res_pjsip_presence_xml.h"
  37 #include "asterisk/res_pjsip_body_generator_types.h"
  38
  39 static int pidf_supplement_body(void *body, void *data)
  40 {
  41         struct ast_sip_exten_state_data *state_data = data;
  42         pj_xml_node *node;
  43
  44         if (ast_strlen_zero(state_data->user_agent) ||
  45             !strstr(state_data->user_agent, "digium")) {
  46                 /* not a digium phone */
  47                 return 0;
  48         }
  49
  50         if (!(node = ast_sip_presence_xml_create_node(
  51                       state_data->pool, body, "tuple"))) {
  52                 ast_log(LOG_WARNING, "Unable to create PIDF tuple\n");
  53                 return -1;
  54         }
  55
  56         ast_sip_presence_xml_create_attr(
  57                 state_data->pool, node, "id", "digium-presence");
  58
  59         if (!(node = ast_sip_presence_xml_create_node(
  60                       state_data->pool, node, "status"))) {
  61                 ast_log(LOG_WARNING, "Unable to create PIDF tuple status\n");
  62                 return -1;
  63         }
  64
  65         if (!(node = ast_sip_presence_xml_create_node(
  66                       state_data->pool, node, "digium_presence"))) {
  67                 ast_log(LOG_WARNING, "Unable to create digium presence\n");
  68                 return -1;
  69         }
  70
  71         if (!ast_strlen_zero(state_data->presence_message)) {
  72                         pj_strdup2(state_data->pool, &node->content,
  73                                    state_data->presence_message);
  74         }
  75
  76         ast_sip_presence_xml_create_attr(
  77                 state_data->pool, node, "type", ast_presence_state2str(
  78                         state_data->presence_state));
  79
  80         if (!ast_strlen_zero(state_data->presence_subtype)) {
  81                 ast_sip_presence_xml_create_attr(
  82                         state_data->pool, node, "subtype",
  83                         state_data->presence_subtype);
  84         }
  85
  86         return 0;
  87 }
  88
  89 static struct ast_sip_pubsub_body_supplement pidf_supplement = {
  90         .type = "application",
  91         .subtype = "pidf+xml",
  92         .supplement_body = pidf_supplement_body,
  93 };
  94
  95 static int load_module(void)
  96 {
  97         if (ast_sip_pubsub_register_body_supplement(&pidf_supplement)) {
  98                 return AST_MODULE_LOAD_DECLINE;
  99         }
 100         return AST_MODULE_LOAD_SUCCESS;
 101 }
 102
 103 static int unload_module(void)
 104 {
 105         ast_sip_pubsub_unregister_body_supplement(&pidf_supplement);
 106         return 0;
 107 }
 108
 109 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP PIDF Digium presence supplement",
 110                 .load = load_module,
 111                 .unload = unload_module,
 112                 .load_pri = AST_MODPRI_CHANNEL_DEPEND,
 113 );