res_hep_rtcp.c File Reference

RTCP logging with Homer. More...

#include "asterisk.h"
#include "asterisk/res_hep.h"
#include "asterisk/module.h"
#include "asterisk/netsock2.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/stasis.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/json.h"
#include "asterisk/config.h"

Include dependency graph for res_hep_rtcp.c:

Go to the source code of this file.

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
static char *	assign_uuid (struct ast_json *json_channel)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	load_module (void)
static void	rtcp_message_handler (struct stasis_message *message)
static void	rtp_topic_handler (void *data, struct stasis_subscription *sub, struct stasis_message *message)
static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "RTCP HEPv3 Logger" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_EXTENDED, .load = load_module, .unload = unload_module, .requires = "res_hep", }
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct stasis_subscription *	stasis_rtp_subscription

Detailed Description

RTCP logging with Homer.

Author

Matt Jordan mjord.nosp@m.an@d.nosp@m.igium.nosp@m..com

Definition in file res_hep_rtcp.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 191 of file res_hep_rtcp.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 191 of file res_hep_rtcp.c.

assign_uuid()

static char * assign_uuid ( struct ast_json *  json_channel )

static

Definition at line 46 of file res_hep_rtcp.c.

{
    const char *channel_name = ast_json_string_get(ast_json_object_get(json_channel, "name"));
    enum hep_uuid_type uuid_type = hepv3_get_uuid_type();
    char *uuid = NULL;
 
    if (!channel_name) {
        return NULL;
    }
 
    if (uuid_type == HEP_UUID_TYPE_CALL_ID) {
        struct ast_channel *chan = NULL;
        char buf[128];
 
        if (ast_begins_with(channel_name, "PJSIP")) {
            chan = ast_channel_get_by_name(channel_name);
 
            if (chan && !ast_func_read(chan, "CHANNEL(pjsip,call-id)", buf, sizeof(buf))) {
                uuid = ast_strdup(buf);
            }
        } else if (ast_begins_with(channel_name, "SIP")) {
            chan = ast_channel_get_by_name(channel_name);
 
            if (chan && !ast_func_read(chan, "SIP_HEADER(call-id)", buf, sizeof(buf))) {
                uuid = ast_strdup(buf);
            }
        }
 
        ast_channel_cleanup(chan);
    }
 
    /* If we couldn't get the call-id or didn't want it, just use the channel name */
    if (!uuid) {
        uuid = ast_strdup(channel_name);
    }
 
    return uuid;
}

References ast_begins_with(), ast_channel_cleanup, ast_channel_get_by_name(), ast_func_read(), ast_json_object_get(), ast_json_string_get(), ast_strdup, buf, HEP_UUID_TYPE_CALL_ID, hepv3_get_uuid_type(), NULL, and uuid().

Referenced by rtcp_message_handler().

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 191 of file res_hep_rtcp.c.

load_module()

static int load_module ( void  )

static

Definition at line 158 of file res_hep_rtcp.c.

{
    if (!hepv3_is_loaded()) {
        ast_log(AST_LOG_WARNING, "res_hep is disabled; declining module load\n");
        return AST_MODULE_LOAD_DECLINE;
    }
 
    stasis_rtp_subscription = stasis_subscribe(ast_rtp_topic(),
        rtp_topic_handler, NULL);
    if (!stasis_rtp_subscription) {
        return AST_MODULE_LOAD_DECLINE;
    }
    stasis_subscription_accept_message_type(stasis_rtp_subscription, ast_rtp_rtcp_sent_type());
    stasis_subscription_accept_message_type(stasis_rtp_subscription, ast_rtp_rtcp_received_type());
    stasis_subscription_set_filter(stasis_rtp_subscription, STASIS_SUBSCRIPTION_FILTER_SELECTIVE);
 
    return AST_MODULE_LOAD_SUCCESS;
}

References ast_log, AST_LOG_WARNING, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_rtp_rtcp_received_type(), ast_rtp_rtcp_sent_type(), ast_rtp_topic(), hepv3_is_loaded(), NULL, rtp_topic_handler(), stasis_rtp_subscription, stasis_subscribe, stasis_subscription_accept_message_type(), STASIS_SUBSCRIPTION_FILTER_SELECTIVE, and stasis_subscription_set_filter().

rtcp_message_handler()

static void rtcp_message_handler ( struct stasis_message *  message )

static

Definition at line 85 of file res_hep_rtcp.c.

{
 
    RAII_VAR(struct ast_json *, json_payload, NULL, ast_json_unref);
    RAII_VAR(char *,  payload, NULL, ast_json_free);
    struct ast_json *json_blob;
    struct ast_json *json_channel;
    struct ast_json *json_rtcp;
    struct hepv3_capture_info *capture_info;
    struct ast_json *from;
    struct ast_json *to;
    struct timeval current_time = ast_tvnow();
 
    json_payload = stasis_message_to_json(message, NULL);
    if (!json_payload) {
        return;
    }
 
    json_blob = ast_json_object_get(json_payload, "blob");
    if (!json_blob) {
        return;
    }
 
    json_channel = ast_json_object_get(json_payload, "channel");
    if (!json_channel) {
        return;
    }
 
    json_rtcp = ast_json_object_get(json_payload, "rtcp_report");
    if (!json_rtcp) {
        return;
    }
 
    from = ast_json_object_get(json_blob, "from");
    to = ast_json_object_get(json_blob, "to");
    if (!from || !to) {
        return;
    }
 
    payload = ast_json_dump_string(json_rtcp);
    if (ast_strlen_zero(payload)) {
        return;
    }
 
    capture_info = hepv3_create_capture_info(payload, strlen(payload));
    if (!capture_info) {
        return;
    }
    ast_sockaddr_parse(&capture_info->src_addr, ast_json_string_get(from), PARSE_PORT_REQUIRE);
    ast_sockaddr_parse(&capture_info->dst_addr, ast_json_string_get(to), PARSE_PORT_REQUIRE);
 
    capture_info->uuid = assign_uuid(json_channel);
    if (!capture_info->uuid) {
        ao2_ref(capture_info, -1);
        return;
    }
    capture_info->capture_time = current_time;
    capture_info->capture_type = HEPV3_CAPTURE_TYPE_RTCP;
    capture_info->zipped = 0;
 
    hepv3_send_packet(capture_info);
}

References ao2_ref, assign_uuid(), ast_json_dump_string, ast_json_free(), ast_json_object_get(), ast_json_string_get(), ast_json_unref(), ast_sockaddr_parse(), ast_strlen_zero(), ast_tvnow(), hepv3_capture_info::capture_time, hepv3_capture_info::capture_type, hepv3_capture_info::dst_addr, HEPV3_CAPTURE_TYPE_RTCP, hepv3_create_capture_info(), hepv3_send_packet(), NULL, PARSE_PORT_REQUIRE, RAII_VAR, hepv3_capture_info::src_addr, stasis_message_to_json(), hepv3_capture_info::uuid, and hepv3_capture_info::zipped.

Referenced by rtp_topic_handler().

rtp_topic_handler()

static void rtp_topic_handler ( void *  data, struct stasis_subscription *  sub, struct stasis_message *  message  )

static

Definition at line 148 of file res_hep_rtcp.c.

{
    struct stasis_message_type *message_type = stasis_message_type(message);
 
    if ((message_type == ast_rtp_rtcp_sent_type()) ||
        (message_type == ast_rtp_rtcp_received_type())) {
        rtcp_message_handler(message);
    }
}

References ast_rtp_rtcp_received_type(), ast_rtp_rtcp_sent_type(), and rtcp_message_handler().

Referenced by load_module().

unload_module()

static int unload_module ( void  )

static

Definition at line 177 of file res_hep_rtcp.c.

{
    if (stasis_rtp_subscription) {
        stasis_rtp_subscription = stasis_unsubscribe_and_join(stasis_rtp_subscription);
    }
 
    return 0;
}

References stasis_rtp_subscription, and stasis_unsubscribe_and_join().

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "RTCP HEPv3 Logger" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_EXTENDED, .load = load_module, .unload = unload_module, .requires = "res_hep", }

static

Definition at line 191 of file res_hep_rtcp.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 191 of file res_hep_rtcp.c.

stasis_rtp_subscription

struct stasis_subscription* stasis_rtp_subscription

static

Definition at line 44 of file res_hep_rtcp.c.

Referenced by load_module(), and unload_module().