res/res_hep_rtcp.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2014, Digium, Inc.
   5  *
   6  * Matt Jordan <mjordan@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 /*!
  20  * \file
  21  * \brief RTCP logging with Homer
  22  *
  23  * \author Matt Jordan <mjordan@digium.com>
  24  *
  25  */
  26
  27 /*** MODULEINFO
  28         <depend>res_hep</depend>
  29         <support_level>extended</support_level>
  30  ***/
  31
  32 #include "asterisk.h"
  33
  34 ASTERISK_REGISTER_FILE()
  35
  36 #include "asterisk/res_hep.h"
  37 #include "asterisk/module.h"
  38 #include "asterisk/netsock2.h"
  39 #include "asterisk/stasis.h"
  40 #include "asterisk/rtp_engine.h"
  41 #include "asterisk/json.h"
  42 #include "asterisk/config.h"
  43
  44 static struct stasis_subscription *stasis_rtp_subscription;
  45
  46 static void rtcp_message_handler(struct stasis_message *message)
  47 {
  48
  49         RAII_VAR(struct ast_json *, json_payload, NULL, ast_json_unref);
  50         RAII_VAR(char *,  payload, NULL, ast_json_free);
  51         struct ast_json *json_blob;
  52         struct ast_json *json_channel;
  53         struct ast_json *json_rtcp;
  54         struct hepv3_capture_info *capture_info;
  55         struct ast_json *from;
  56         struct ast_json *to;
  57         struct timeval current_time = ast_tvnow();
  58
  59         json_payload = stasis_message_to_json(message, NULL);
  60         if (!json_payload) {
  61                 return;
  62         }
  63
  64         json_blob = ast_json_object_get(json_payload, "blob");
  65         if (!json_blob) {
  66                 return;
  67         }
  68
  69         json_channel = ast_json_object_get(json_payload, "channel");
  70         if (!json_channel) {
  71                 return;
  72         }
  73
  74         json_rtcp = ast_json_object_get(json_payload, "rtcp_report");
  75         if (!json_rtcp) {
  76                 return;
  77         }
  78
  79         from = ast_json_object_get(json_blob, "from");
  80         to = ast_json_object_get(json_blob, "to");
  81         if (!from || !to) {
  82                 return;
  83         }
  84
  85         payload = ast_json_dump_string(json_rtcp);
  86         if (ast_strlen_zero(payload)) {
  87                 return;
  88         }
  89
  90         capture_info = hepv3_create_capture_info(payload, strlen(payload));
  91         if (!capture_info) {
  92                 return;
  93         }
  94         ast_sockaddr_parse(&capture_info->src_addr, ast_json_string_get(from), PARSE_PORT_REQUIRE);
  95         ast_sockaddr_parse(&capture_info->dst_addr, ast_json_string_get(to), PARSE_PORT_REQUIRE);
  96
  97         capture_info->uuid = ast_strdup(ast_json_string_get(ast_json_object_get(json_channel, "name")));
  98         if (!capture_info->uuid) {
  99                 ao2_ref(capture_info, -1);
 100                 return;
 101         }
 102         capture_info->capture_time = current_time;
 103         capture_info->capture_type = HEPV3_CAPTURE_TYPE_RTCP;
 104         capture_info->zipped = 0;
 105
 106         hepv3_send_packet(capture_info);
 107 }
 108
 109 static void rtp_topic_handler(void *data, struct stasis_subscription *sub, struct stasis_message *message)
 110 {
 111         struct stasis_message_type *message_type = stasis_message_type(message);
 112
 113         if ((message_type == ast_rtp_rtcp_sent_type()) ||
 114                 (message_type == ast_rtp_rtcp_received_type())) {
 115                 rtcp_message_handler(message);
 116         }
 117 }
 118
 119 static int load_module(void)
 120 {
 121
 122         stasis_rtp_subscription = stasis_subscribe(ast_rtp_topic(),
 123                 rtp_topic_handler, NULL);
 124         if (!stasis_rtp_subscription) {
 125                 return AST_MODULE_LOAD_FAILURE;
 126         }
 127
 128         return AST_MODULE_LOAD_SUCCESS;
 129 }
 130
 131 static int unload_module(void)
 132 {
 133         if (stasis_rtp_subscription) {
 134                 stasis_rtp_subscription = stasis_unsubscribe_and_join(stasis_rtp_subscription);
 135         }
 136
 137         return 0;
 138 }
 139
 140 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "RTCP HEPv3 Logger",
 141         .load = load_module,
 142         .unload = unload_module,
 143         .load_pri = AST_MODPRI_DEFAULT,
 144 );