res_pjsip_rfc3326.c File Reference

#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_ua.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/module.h"
#include "asterisk/causes.h"
#include "asterisk/threadpool.h"

Include dependency graph for res_pjsip_rfc3326.c:

Go to the source code of this file.

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	load_module (void)
static void	rfc3326_add_reason_header (struct ast_sip_session *session, struct pjsip_tx_data *tdata)
static int	rfc3326_incoming_request (struct ast_sip_session *session, struct pjsip_rx_data *rdata)
static void	rfc3326_incoming_response (struct ast_sip_session *session, struct pjsip_rx_data *rdata)
static void	rfc3326_outgoing_request (struct ast_sip_session *session, struct pjsip_tx_data *tdata)
static void	rfc3326_outgoing_response (struct ast_sip_session *session, struct pjsip_tx_data *tdata)
static void	rfc3326_use_reason_header (struct ast_sip_session *session, struct pjsip_rx_data *rdata)
static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "PJSIP RFC3326 Support" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND, .requires = "res_pjsip,res_pjsip_session", }
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_sip_session_supplement	rfc3326_supplement

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 187 of file res_pjsip_rfc3326.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 187 of file res_pjsip_rfc3326.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 187 of file res_pjsip_rfc3326.c.

load_module()

static int load_module ( void  )

static

Definition at line 169 of file res_pjsip_rfc3326.c.

{
    ast_sip_session_register_supplement(&rfc3326_supplement);
    return AST_MODULE_LOAD_SUCCESS;
}

References AST_MODULE_LOAD_SUCCESS, ast_sip_session_register_supplement, and rfc3326_supplement.

rfc3326_add_reason_header()

static void rfc3326_add_reason_header ( struct ast_sip_session *  session, struct pjsip_tx_data *  tdata  )

static

Definition at line 113 of file res_pjsip_rfc3326.c.

{
    char buf[20];
 
    if (ast_channel_hangupcause(session->channel) == AST_CAUSE_ANSWERED_ELSEWHERE) {
        ast_sip_add_header(tdata, "Reason", "SIP;cause=200;text=\"Call completed elsewhere\"");
    }
 
    if (session->endpoint && session->endpoint->suppress_q850_reason_headers) {
        ast_debug(1, "A Q.850 '%s'(%i) Reason header was suppressed for endpoint '%s'\n",
            ast_cause2str((ast_channel_hangupcause(session->channel) & 0x7f)),
            (ast_channel_hangupcause(session->channel) & 0x7f),
            ast_sorcery_object_get_id(session->endpoint));
    } else {
        snprintf(buf, sizeof(buf), "Q.850;cause=%i", ast_channel_hangupcause(session->channel) & 0x7f);
        ast_sip_add_header(tdata, "Reason", buf);
    }
}

References ast_cause2str(), AST_CAUSE_ANSWERED_ELSEWHERE, ast_channel_hangupcause(), ast_debug, ast_sip_add_header(), ast_sorcery_object_get_id(), buf, and session.

Referenced by rfc3326_outgoing_request(), and rfc3326_outgoing_response().

rfc3326_incoming_request()

static int rfc3326_incoming_request ( struct ast_sip_session *  session, struct pjsip_rx_data *  rdata  )

static

Definition at line 89 of file res_pjsip_rfc3326.c.

{
    if ((pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_bye_method) &&
         pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_cancel_method)) ||
        !session->channel) {
        return 0;
    }
 
    rfc3326_use_reason_header(session, rdata);
 
    return 0;
}

References rfc3326_use_reason_header(), and session.

rfc3326_incoming_response()

static void rfc3326_incoming_response ( struct ast_sip_session *  session, struct pjsip_rx_data *  rdata  )

static

Definition at line 102 of file res_pjsip_rfc3326.c.

{
    struct pjsip_status_line status = rdata->msg_info.msg->line.status;
 
    if ((status.code < 300) || !session->channel) {
        return;
    }
 
    rfc3326_use_reason_header(session, rdata);
}

References rfc3326_use_reason_header(), session, and status.

rfc3326_outgoing_request()

static void rfc3326_outgoing_request ( struct ast_sip_session *  session, struct pjsip_tx_data *  tdata  )

static

Definition at line 132 of file res_pjsip_rfc3326.c.

{
    if ((pjsip_method_cmp(&tdata->msg->line.req.method, &pjsip_bye_method)
            && pjsip_method_cmp(&tdata->msg->line.req.method, &pjsip_cancel_method))
        || !session->channel
        /*
         * The session->channel has been seen to go away on us between
         * checks so we must also be running under the call's serializer
         * thread.
         */
        || session->serializer != ast_threadpool_serializer_get_current()) {
        return;
    }
 
    rfc3326_add_reason_header(session, tdata);
}

References ast_threadpool_serializer_get_current(), rfc3326_add_reason_header(), and session.

rfc3326_outgoing_response()

static void rfc3326_outgoing_response ( struct ast_sip_session *  session, struct pjsip_tx_data *  tdata  )

static

Definition at line 149 of file res_pjsip_rfc3326.c.

{
    struct pjsip_status_line status = tdata->msg->line.status;
 
    if (status.code < 300
        || !session->channel
        || session->serializer != ast_threadpool_serializer_get_current()) {
        return;
    }
 
    rfc3326_add_reason_header(session, tdata);
}

References ast_threadpool_serializer_get_current(), rfc3326_add_reason_header(), session, and status.

rfc3326_use_reason_header()

static void rfc3326_use_reason_header ( struct ast_sip_session *  session, struct pjsip_rx_data *  rdata  )

static

Definition at line 37 of file res_pjsip_rfc3326.c.

{
    static const pj_str_t str_reason = { "Reason", 6 };
    pjsip_generic_string_hdr *header;
    char buf[128];
    char *cause;
    int code_q850 = 0, code_sip = 0;
 
    header = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_reason, NULL);
    for (; header;
        header = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_reason, header->next)) {
        int cause_q850, cause_sip;
        struct ast_control_pvt_cause_code *cause_code;
        int data_size = sizeof(*cause_code);
 
        ast_copy_pj_str(buf, &header->hvalue, sizeof(buf));
        cause = ast_skip_blanks(buf);
        cause_q850 = !strncasecmp(cause, "Q.850", 5);
        cause_sip = !strncasecmp(cause, "SIP", 3);
        if ((cause_q850 || cause_sip) && (cause = strstr(cause, "cause="))) {
            int *code = cause_q850 ? &code_q850 : &code_sip;
            if (sscanf(cause, "cause=%30d", code) != 1) {
                *code = 0;
            }
 
            /* Safe */
            /* Build and send the tech-specific cause information */
            /* size of the string making up the cause code is "SIP " + reason length */
            data_size += 4 + strlen(cause) + 1;
            cause_code = ast_alloca(data_size);
            memset(cause_code, 0, data_size);
            ast_copy_string(cause_code->chan_name, ast_channel_name(session->channel), AST_CHANNEL_NAME);
            snprintf(cause_code->code, data_size, "SIP %s", cause);
 
            cause_code->cause_extended = 1;
            if (code_q850) {
                cause_code->ast_cause = *code & 0x7;
            } else if (code_sip) {
                cause_code->ast_cause = ast_sip_hangup_sip2cause(*code);
            }
            ast_queue_control_data(session->channel, AST_CONTROL_PVT_CAUSE_CODE, cause_code, data_size);
            ast_channel_hangupcause_hash_set(session->channel, cause_code, data_size);
        }
    }
 
    if (code_q850) {
        ast_channel_hangupcause_set(session->channel, code_q850 & 0x7f);
    } else if (code_sip) {
        ast_channel_hangupcause_set(session->channel, ast_sip_hangup_sip2cause(code_sip));
    }
}

References ast_alloca, ast_control_pvt_cause_code::ast_cause, ast_channel_hangupcause_hash_set(), ast_channel_hangupcause_set(), AST_CHANNEL_NAME, ast_channel_name(), AST_CONTROL_PVT_CAUSE_CODE, ast_copy_pj_str(), ast_copy_string(), ast_queue_control_data(), ast_sip_hangup_sip2cause(), ast_skip_blanks(), buf, ast_control_pvt_cause_code::cause_extended, ast_control_pvt_cause_code::chan_name, ast_control_pvt_cause_code::code, header::next, NULL, and session.

Referenced by rfc3326_incoming_request(), and rfc3326_incoming_response().

unload_module()

static int unload_module ( void  )

static

Definition at line 175 of file res_pjsip_rfc3326.c.

{
    ast_sip_session_unregister_supplement(&rfc3326_supplement);
    return 0;
}

References ast_sip_session_unregister_supplement(), and rfc3326_supplement.

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "PJSIP RFC3326 Support" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND, .requires = "res_pjsip,res_pjsip_session", }

static

Definition at line 187 of file res_pjsip_rfc3326.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 187 of file res_pjsip_rfc3326.c.

rfc3326_supplement

struct ast_sip_session_supplement rfc3326_supplement

static

Definition at line 162 of file res_pjsip_rfc3326.c.

                                                              {
    .incoming_request = rfc3326_incoming_request,
    .incoming_response = rfc3326_incoming_response,
    .outgoing_request = rfc3326_outgoing_request,
    .outgoing_response = rfc3326_outgoing_response,
};

Referenced by load_module(), and unload_module().