res/res_pjsip_pidf_eyebeam_body_supplement.c

   1 /*
   2  * asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2014, 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 /*** 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/res_pjsip.h"
  34 #include "asterisk/res_pjsip_pubsub.h"
  35 #include "asterisk/res_pjsip_presence_xml.h"
  36 #include "asterisk/res_pjsip_body_generator_types.h"
  37
  38 /*!
  39  * \internal
  40  * \brief Adds non standard elements to the xml body
  41  *
  42  * This is some code that was part of the original chan_sip implementation
  43  * that is not part of the RFC 3863 definition, but we are keeping available
  44  * for backward compatability. The original comment stated that Eyebeam
  45  * supports this format.
  46  */
  47 static void add_eyebeam(pj_pool_t *pool, pj_xml_node *node, const char *pidfstate)
  48 {
  49         static const char *XMLNS_PP = "xmlns:pp";
  50         static const char *XMLNS_PERSON = "urn:ietf:params:xml:ns:pidf:person";
  51
  52         static const char *XMLNS_ES = "xmlns:es";
  53         static const char *XMLNS_RPID_STATUS = "urn:ietf:params:xml:ns:pidf:rpid:status:rpid-status";
  54
  55         static const char *XMLNS_EP = "xmlns:ep";
  56         static const char *XMLNS_RPID_PERSON = "urn:ietf:params:xml:ns:pidf:rpid:rpid-person";
  57
  58         pj_xml_node *person = ast_sip_presence_xml_create_node(pool, node, "pp:person");
  59         pj_xml_node *status = ast_sip_presence_xml_create_node(pool, person, "status");
  60
  61         if (pidfstate[0] != '-') {
  62                 pj_xml_node *activities = ast_sip_presence_xml_create_node(pool, status, "ep:activities");
  63                 size_t str_size = sizeof("ep:") + strlen(pidfstate);
  64
  65                 activities->content.ptr = pj_pool_alloc(pool, str_size);
  66                 activities->content.slen = pj_ansi_snprintf(activities->content.ptr, str_size,
  67                                 "ep:%s", pidfstate);
  68         }
  69
  70         ast_sip_presence_xml_create_attr(pool, node, XMLNS_PP, XMLNS_PERSON);
  71         ast_sip_presence_xml_create_attr(pool, node, XMLNS_ES, XMLNS_RPID_STATUS);
  72         ast_sip_presence_xml_create_attr(pool, node, XMLNS_EP, XMLNS_RPID_PERSON);
  73 }
  74
  75 static int pidf_supplement_body(void *body, void *data)
  76 {
  77         pjpidf_pres *pres = body;
  78         struct ast_sip_exten_state_data *state_data = data;
  79         char *statestring = NULL, *pidfstate = NULL, *pidfnote = NULL;
  80         enum ast_sip_pidf_state local_state;
  81
  82         ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
  83                         &pidfstate, &pidfnote, &local_state);
  84
  85         add_eyebeam(state_data->pool, pres, pidfstate);
  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         CHECK_PJSIP_PUBSUB_MODULE_LOADED();
  98
  99         if (ast_sip_pubsub_register_body_supplement(&pidf_supplement)) {
 100                 return AST_MODULE_LOAD_DECLINE;
 101         }
 102         return AST_MODULE_LOAD_SUCCESS;
 103 }
 104
 105 static int unload_module(void)
 106 {
 107         ast_sip_pubsub_unregister_body_supplement(&pidf_supplement);
 108         return 0;
 109 }
 110
 111 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP PIDF Eyebeam supplement",
 112         .support_level = AST_MODULE_SUPPORT_CORE,
 113         .load = load_module,
 114         .unload = unload_module,
 115         .load_pri = AST_MODPRI_CHANNEL_DEPEND,
 116 );