app_waitforring.c File Reference

Wait for Ring Application. More...

#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"

Include dependency graph for app_waitforring.c:

Go to the source code of this file.

Functions
	AST_MODULE_INFO_STANDARD_EXTENDED (ASTERISK_GPL_KEY, "Waits until first ring after time")
static int	load_module (void)
static int	unload_module (void)
static int	waitforring_exec (struct ast_channel *chan, const char *data)

Variables
static char *	app = "WaitForRing"

Detailed Description

Wait for Ring Application.

Author

Mark Spencer marks.nosp@m.ter@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

Definition in file app_waitforring.c.

Function Documentation

AST_MODULE_INFO_STANDARD_EXTENDED()

AST_MODULE_INFO_STANDARD_EXTENDED	(	ASTERISK_GPL_KEY	,
		"Waits until first ring after time"
	)

load_module()

static int load_module ( void  )

static

Definition at line 139 of file app_waitforring.c.

{
    return ast_register_application_xml(app, waitforring_exec);
}

References app, ast_register_application_xml, and waitforring_exec().

unload_module()

static int unload_module ( void  )

static

Definition at line 134 of file app_waitforring.c.

{
    return ast_unregister_application(app);
}

References app, and ast_unregister_application().

waitforring_exec()

static int waitforring_exec ( struct ast_channel *  chan, const char *  data  )

static

Definition at line 61 of file app_waitforring.c.

{
    struct ast_frame *f;
    struct ast_silence_generator *silgen = NULL;
    int res = 0;
    double s;
    int timeout_ms;
    int ms;
    struct timeval start = ast_tvnow();
 
    if (!data || (sscanf(data, "%30lg", &s) != 1)) {
        ast_log(LOG_WARNING, "WaitForRing requires an argument (minimum seconds)\n");
        return 0;
    }
 
    if (s < 0.0) {
        ast_log(LOG_WARNING, "Invalid timeout provided for WaitForRing (%lg)\n", s);
        return 0;
    }
 
    if (ast_opt_transmit_silence) {
        silgen = ast_channel_start_silence_generator(chan);
    }
 
    timeout_ms = s * 1000.0;
    while ((ms = ast_remaining_ms(start, timeout_ms))) {
        ms = ast_waitfor(chan, ms);
        if (ms < 0) {
            res = -1;
            break;
        }
        if (ms > 0) {
            f = ast_read(chan);
            if (!f) {
                res = -1;
                break;
            }
            if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass.integer == AST_CONTROL_RING)) {
                ast_verb(3, "Got a ring but still waiting for timeout\n");
            }
            ast_frfree(f);
        }
    }
    /* Now we're really ready for the ring */
    if (!res) {
        for (;;) {
            int wait_res = ast_waitfor(chan, -1);
            if (wait_res < 0) {
                res = -1;
                break;
            } else {
                f = ast_read(chan);
                if (!f) {
                    res = -1;
                    break;
                }
                if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass.integer == AST_CONTROL_RING)) {
                    ast_verb(3, "Got a ring after the timeout\n");
                    ast_frfree(f);
                    break;
                }
                ast_frfree(f);
            }
        }
    }
 
    if (silgen) {
        ast_channel_stop_silence_generator(chan, silgen);
    }
 
    return res;
}

References ast_channel_start_silence_generator(), ast_channel_stop_silence_generator(), AST_CONTROL_RING, AST_FRAME_CONTROL, ast_frfree, ast_log, ast_opt_transmit_silence, ast_read(), ast_remaining_ms(), ast_tvnow(), ast_verb, ast_waitfor(), ast_frame::frametype, ast_frame_subclass::integer, LOG_WARNING, NULL, and ast_frame::subclass.

Referenced by load_module().

Variable Documentation

app

char* app = "WaitForRing"

static

Definition at line 59 of file app_waitforring.c.

Referenced by load_module(), and unload_module().