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asterisk/apps/app_agi.c

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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Asterisk Gateway Interface
*
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#include <sys/types.h>
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/pbx.h>
#include <asterisk/module.h>
#include <asterisk/astdb.h>
#include <math.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/time.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <asterisk/cli.h>
#include <asterisk/logger.h>
#include <asterisk/options.h>
#include <asterisk/image.h>
#include <asterisk/say.h>
#include <asterisk/app.h>
#include <asterisk/dsp.h>
#include <asterisk/musiconhold.h>
#include "../asterisk.h"
#include "../astconf.h"
#include <pthread.h>
#define MAX_ARGS 128
/* Recycle some stuff from the CLI interface */
#define fdprintf ast_cli
typedef struct agi_state {
int fd; /* FD for general output */
int audio; /* FD for audio output */
int ctrl; /* FD for input control */
} AGI;
typedef struct agi_command {
/* Null terminated list of the words of the command */
char *cmda[AST_MAX_CMD_LEN];
/* Handler for the command (channel, AGI state, # of arguments, argument list).
Returns RESULT_SHOWUSAGE for improper arguments */
int (*handler)(struct ast_channel *chan, AGI *agi, int argc, char *argv[]);
/* Summary of the command (< 60 characters) */
char *summary;
/* Detailed usage information */
char *usage;
} agi_command;
static char *tdesc = "Asterisk Gateway Interface (AGI)";
static char *app = "AGI";
static char *eapp = "EAGI";
static char *synopsis = "Executes an AGI compliant application";
static char *descrip =
" [E]AGI(command|args): Executes an Asterisk Gateway Interface compliant\n"
"program on a channel. AGI allows Asterisk to launch external programs\n"
"written in any language to control a telephony channel, play audio,\n"
"read DTMF digits, etc. by communicating with the AGI protocol on stdin\n"
"and stdout. Returns -1 on hangup or if application requested hangup, or\n"
"0 on non-hangup exit. Using 'EAGI' provides enhanced AGI, with audio\n"
"available out of band on file descriptor 3\n";
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
#define TONE_BLOCK_SIZE 200
static int launch_script(char *script, char *args, int *fds, int *efd, int *opid)
{
char tmp[256];
int pid;
int toast[2];
int fromast[2];
int audio[2];
int x;
int res;
if (script[0] != '/') {
snprintf(tmp, sizeof(tmp), "%s/%s", (char *)ast_config_AST_AGI_DIR, script);
script = tmp;
}
if (pipe(toast)) {
ast_log(LOG_WARNING, "Unable to create toast pipe: %s\n",strerror(errno));
return -1;
}
if (pipe(fromast)) {
ast_log(LOG_WARNING, "unable to create fromast pipe: %s\n", strerror(errno));
close(toast[0]);
close(toast[1]);
return -1;
}
if (efd) {
if (pipe(audio)) {
ast_log(LOG_WARNING, "unable to create audio pipe: %s\n", strerror(errno));
close(fromast[0]);
close(fromast[1]);
close(toast[0]);
close(toast[1]);
return -1;
}
res = fcntl(audio[1], F_GETFL);
if (res > -1)
res = fcntl(audio[1], F_SETFL, res | O_NONBLOCK);
if (res < 0) {
ast_log(LOG_WARNING, "unable to set audio pipe parameters: %s\n", strerror(errno));
close(fromast[0]);
close(fromast[1]);
close(toast[0]);
close(toast[1]);
close(audio[0]);
close(audio[1]);
return -1;
}
}
pid = fork();
if (pid < 0) {
ast_log(LOG_WARNING, "Failed to fork(): %s\n", strerror(errno));
return -1;
}
if (!pid) {
/* Redirect stdin and out, provide enhanced audio channel if desired */
dup2(fromast[0], STDIN_FILENO);
dup2(toast[1], STDOUT_FILENO);
if (efd) {
dup2(audio[0], STDERR_FILENO + 1);
} else {
close(STDERR_FILENO + 1);
}
/* Close everything but stdin/out/error */
for (x=STDERR_FILENO + 2;x<1024;x++)
close(x);
/* Execute script */
execl(script, script, args, (char *)NULL);
/* Can't use ast_log since FD's are closed */
fprintf(stderr, "Failed to execute '%s': %s\n", script, strerror(errno));
exit(1);
}
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Launched AGI Script %s\n", script);
fds[0] = toast[0];
fds[1] = fromast[1];
if (efd) {
*efd = audio[1];
}
/* close what we're not using in the parent */
close(toast[1]);
close(fromast[0]);
*opid = pid;
return 0;
}
static void setup_env(struct ast_channel *chan, char *request, int fd, int enhanced)
{
/* Print initial environment, with agi_request always being the first
thing */
fdprintf(fd, "agi_request: %s\n", request);
fdprintf(fd, "agi_channel: %s\n", chan->name);
fdprintf(fd, "agi_language: %s\n", chan->language);
fdprintf(fd, "agi_type: %s\n", chan->type);
fdprintf(fd, "agi_uniqueid: %s\n", chan->uniqueid);
/* ANI/DNIS */
fdprintf(fd, "agi_callerid: %s\n", chan->callerid ? chan->callerid : "unknown");
fdprintf(fd, "agi_dnid: %s\n", chan->dnid ? chan->dnid : "unknown");
fdprintf(fd, "agi_rdnis: %s\n", chan->rdnis ? chan->rdnis : "unknown");
/* Context information */
fdprintf(fd, "agi_context: %s\n", chan->context);
fdprintf(fd, "agi_extension: %s\n", chan->exten);
fdprintf(fd, "agi_priority: %d\n", chan->priority);
fdprintf(fd, "agi_enhanced: %s\n", enhanced ? "1.0" : "0.0");
/* User information */
fdprintf(fd, "agi_accountcode: %s\n", chan->accountcode ? chan->accountcode : "");
/* End with empty return */
fdprintf(fd, "\n");
}
static int handle_answer(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
res = 0;
if (chan->_state != AST_STATE_UP) {
/* Answer the chan */
res = ast_answer(chan);
}
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_waitfordigit(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
int to;
if (argc != 4)
return RESULT_SHOWUSAGE;
if (sscanf(argv[3], "%i", &to) != 1)
return RESULT_SHOWUSAGE;
res = ast_waitfordigit_full(chan, to, agi->audio, agi->ctrl);
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_sendtext(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
if (argc != 3)
return RESULT_SHOWUSAGE;
/* At the moment, the parser (perhaps broken) returns with
the last argument PLUS the newline at the end of the input
buffer. This probably needs to be fixed, but I wont do that
because other stuff may break as a result. The right way
would probably be to strip off the trailing newline before
parsing, then here, add a newline at the end of the string
before sending it to ast_sendtext --DUDE */
res = ast_sendtext(chan, argv[2]);
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_recvchar(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
if (argc != 3)
return RESULT_SHOWUSAGE;
res = ast_recvchar(chan,atoi(argv[2]));
if (res == 0) {
fdprintf(agi->fd, "200 result=%d (timeout)\n", res);
return RESULT_SUCCESS;
}
if (res > 0) {
fdprintf(agi->fd, "200 result=%d\n", res);
return RESULT_SUCCESS;
}
else {
fdprintf(agi->fd, "200 result=%d (hangup)\n", res);
return RESULT_FAILURE;
}
}
static int handle_tddmode(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res,x;
if (argc != 3)
return RESULT_SHOWUSAGE;
if (!strncasecmp(argv[2],"on",2)) x = 1; else x = 0;
if (!strncasecmp(argv[2],"mate",4)) x = 2;
if (!strncasecmp(argv[2],"tdd",3)) x = 1;
res = ast_channel_setoption(chan,AST_OPTION_TDD,&x,sizeof(char),0);
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_sendimage(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
if (argc != 3)
return RESULT_SHOWUSAGE;
res = ast_send_image(chan, argv[2]);
if (!ast_check_hangup(chan))
res = 0;
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_streamfile(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
struct ast_filestream *fs;
long sample_offset = 0;
long max_length;
if (argc < 4)
return RESULT_SHOWUSAGE;
if (argc > 5)
return RESULT_SHOWUSAGE;
if ((argc > 4) && (sscanf(argv[4], "%ld", &sample_offset) != 1))
return RESULT_SHOWUSAGE;
fs = ast_openstream(chan, argv[2], chan->language);
if(!fs){
fdprintf(agi->fd, "200 result=%d endpos=%ld\n", 0, sample_offset);
ast_log(LOG_WARNING, "Unable to open %s\n", argv[2]);
return RESULT_FAILURE;
}
ast_seekstream(fs, 0, SEEK_END);
max_length = ast_tellstream(fs);
ast_seekstream(fs, sample_offset, SEEK_SET);
res = ast_applystream(chan, fs);
res = ast_playstream(fs);
if (res) {
fdprintf(agi->fd, "200 result=%d endpos=%ld\n", res, sample_offset);
if (res >= 0)
return RESULT_SHOWUSAGE;
else
return RESULT_FAILURE;
}
res = ast_waitstream_full(chan, argv[3], agi->audio, agi->ctrl);
/* this is to check for if ast_waitstream closed the stream, we probably are at
* the end of the stream, return that amount, else check for the amount */
sample_offset = (chan->stream)?ast_tellstream(fs):max_length;
ast_stopstream(chan);
if (res == 1) {
/* Stop this command, don't print a result line, as there is a new command */
return RESULT_SUCCESS;
}
fdprintf(agi->fd, "200 result=%d endpos=%ld\n", res, sample_offset);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_saynumber(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
int num;
if (argc != 4)
return RESULT_SHOWUSAGE;
if (sscanf(argv[2], "%i", &num) != 1)
return RESULT_SHOWUSAGE;
res = ast_say_number_full(chan, num, argv[3], chan->language, agi->audio, agi->ctrl);
if (res == 1)
return RESULT_SUCCESS;
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_saydigits(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
int num;
if (argc != 4)
return RESULT_SHOWUSAGE;
if (sscanf(argv[2], "%i", &num) != 1)
return RESULT_SHOWUSAGE;
res = ast_say_digit_str_full(chan, argv[2], argv[3], chan->language, agi->audio, agi->ctrl);
if (res == 1) /* New command */
return RESULT_SUCCESS;
fdprintf(agi->fd, "200 result=%d\n", res);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_getdata(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int res;
char data[1024];
int max;
int timeout;
if (argc < 3)
return RESULT_SHOWUSAGE;
if (argc >= 4) timeout = atoi(argv[3]); else timeout = 0;
if (argc >= 5) max = atoi(argv[4]); else max = 1024;
res = ast_app_getdata_full(chan, argv[2], data, max, timeout, agi->audio, agi->ctrl);
if (res == 2) /* New command */
return RESULT_SUCCESS;
else if (res == 1)
fdprintf(agi->fd, "200 result=%s (timeout)\n", data);
else if (res < 0 )
fdprintf(agi->fd, "200 result=-1\n");
else
fdprintf(agi->fd, "200 result=%s\n", data);
if (res >= 0)
return RESULT_SUCCESS;
else
return RESULT_FAILURE;
}
static int handle_setcontext(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
if (argc != 3)
return RESULT_SHOWUSAGE;
strncpy(chan->context, argv[2], sizeof(chan->context)-1);
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static int handle_setextension(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
if (argc != 3)
return RESULT_SHOWUSAGE;
strncpy(chan->exten, argv[2], sizeof(chan->exten)-1);
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static int handle_setpriority(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int pri;
if (argc != 3)
return RESULT_SHOWUSAGE;
if (sscanf(argv[2], "%i", &pri) != 1)
return RESULT_SHOWUSAGE;
chan->priority = pri - 1;
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static int handle_recordfile(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
struct ast_filestream *fs;
struct ast_frame *f;
struct timeval tv, start;
long sample_offset = 0;
int res = 0;
int ms;
struct ast_dsp *sildet=NULL; /* silence detector dsp */
int totalsilence = 0;
int dspsilence = 0;
int silence = 0; /* amount of silence to allow */
int gotsilence = 0; /* did we timeout for silence? */
char *silencestr=NULL;
int rfmt=0;
/* XXX EAGI FIXME XXX */
if (argc < 6)
return RESULT_SHOWUSAGE;
if (sscanf(argv[5], "%i", &ms) != 1)
return RESULT_SHOWUSAGE;
if (argc > 6)
silencestr = strchr(argv[6],'s');
if ((argc > 7) && (!silencestr))
silencestr = strchr(argv[7],'s');
if ((argc > 8) && (!silencestr))
silencestr = strchr(argv[8],'s');
if (silencestr) {
if (strlen(silencestr) > 2) {
if ((silencestr[0] == 's') && (silencestr[1] == '=')) {
silencestr++;
silencestr++;
if (silencestr)
silence = atoi(silencestr);
if (silence > 0)
silence *= 1000;
}
}
}
if (silence > 0) {
rfmt = chan->readformat;
res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
if (res < 0) {
ast_log(LOG_WARNING, "Unable to set to linear mode, giving up\n");
return -1;
}
sildet = ast_dsp_new();
if (!sildet) {
ast_log(LOG_WARNING, "Unable to create silence detector :(\n");
return -1;
}
ast_dsp_set_threshold(sildet, 256);
}
/* backward compatibility, if no offset given, arg[6] would have been
* caught below and taken to be a beep, else if it is a digit then it is a
* offset */
if ((argc >6) && (sscanf(argv[6], "%ld", &sample_offset) != 1) && (!strchr(argv[6], '=')))
res = ast_streamfile(chan, "beep", chan->language);
if ((argc > 7) && (!strchr(argv[7], '=')))
res = ast_streamfile(chan, "beep", chan->language);
if (!res)
res = ast_waitstream(chan, argv[4]);
if (!res) {
fs = ast_writefile(argv[2], argv[3], NULL, O_CREAT | O_WRONLY | (sample_offset ? O_APPEND : 0), 0, 0644);
if (!fs) {
res = -1;
fdprintf(agi->fd, "200 result=%d (writefile)\n", res);
return RESULT_FAILURE;
}
chan->stream = fs;
ast_applystream(chan,fs);
/* really should have checks */
ast_seekstream(fs, sample_offset, SEEK_SET);
ast_truncstream(fs);
gettimeofday(&start, NULL);
gettimeofday(&tv, NULL);
while ((ms < 0) || (((tv.tv_sec - start.tv_sec) * 1000 + (tv.tv_usec - start.tv_usec)/1000) < ms)) {
res = ast_waitfor(chan, -1);
if (res < 0) {
ast_closestream(fs);
fdprintf(agi->fd, "200 result=%d (waitfor) endpos=%ld\n", res,sample_offset);
return RESULT_FAILURE;
}
f = ast_read(chan);
if (!f) {
fdprintf(agi->fd, "200 result=%d (hangup) endpos=%ld\n", 0, sample_offset);
ast_closestream(fs);
return RESULT_FAILURE;
}
switch(f->frametype) {
case AST_FRAME_DTMF:
if (strchr(argv[4], f->subclass)) {
/* This is an interrupting chracter */
sample_offset = ast_tellstream(fs);
fdprintf(agi->fd, "200 result=%d (dtmf) endpos=%ld\n", f->subclass, sample_offset);
ast_closestream(fs);
ast_frfree(f);
return RESULT_SUCCESS;
}
break;
case AST_FRAME_VOICE:
ast_writestream(fs, f);
/* this is a safe place to check progress since we know that fs
* is valid after a write, and it will then have our current
* location */
sample_offset = ast_tellstream(fs);
if (silence > 0) {
dspsilence = 0;
ast_dsp_silence(sildet, f, &dspsilence);
if (dspsilence) {
totalsilence = dspsilence;
} else {
totalsilence = 0;
}
if (totalsilence > silence) {
/* Ended happily with silence */
ast_frfree(f);
gotsilence = 1;
break;
}
}
break;
}
ast_frfree(f);
gettimeofday(&tv, NULL);
if (gotsilence)
break;
}
if (gotsilence) {
ast_stream_rewind(fs, silence-1000);
ast_truncstream(fs);
}
fdprintf(agi->fd, "200 result=%d (timeout) endpos=%ld\n", res, sample_offset);
ast_closestream(fs);
} else
fdprintf(agi->fd, "200 result=%d (randomerror) endpos=%ld\n", res, sample_offset);
if (silence > 0) {
res = ast_set_read_format(chan, rfmt);
if (res)
ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", chan->name);
ast_dsp_free(sildet);
}
return RESULT_SUCCESS;
}
static int handle_autohangup(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
int timeout;
if (argc != 3)
return RESULT_SHOWUSAGE;
if (sscanf(argv[2], "%d", &timeout) != 1)
return RESULT_SHOWUSAGE;
if (timeout < 0)
timeout = 0;
if (timeout)
chan->whentohangup = time(NULL) + timeout;
else
chan->whentohangup = 0;
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static int handle_hangup(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
struct ast_channel *c;
if (argc==1) {
/* no argument: hangup the current channel */
ast_softhangup(chan,AST_SOFTHANGUP_EXPLICIT);
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
} else if (argc==2) {
/* one argument: look for info on the specified channel */
c = ast_channel_walk(NULL);
while (c) {
if (strcasecmp(argv[1],c->name)==0) {
/* we have a matching channel */
ast_softhangup(c,AST_SOFTHANGUP_EXPLICIT);
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
c = ast_channel_walk(c);
}
/* if we get this far no channel name matched the argument given */
fdprintf(agi->fd, "200 result=-1\n");
return RESULT_SUCCESS;
} else {
return RESULT_SHOWUSAGE;
}
}
static int handle_exec(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int res;
struct ast_app *app;
if (argc < 2)
return RESULT_SHOWUSAGE;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "AGI Script Executing Application: (%s) Options: (%s)\n", argv[1], argv[2]);
app = pbx_findapp(argv[1]);
if (app) {
res = pbx_exec(chan, app, argv[2], 1);
} else {
ast_log(LOG_WARNING, "Could not find application (%s)\n", argv[1]);
res = -2;
}
fdprintf(agi->fd, "200 result=%d\n", res);
return res;
}
static int handle_setcallerid(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
if (argv[2])
ast_set_callerid(chan, argv[2], 0);
/* strncpy(chan->callerid, argv[2], sizeof(chan->callerid)-1);
*/ fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
static int handle_channelstatus(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
struct ast_channel *c;
if (argc==2) {
/* no argument: supply info on the current channel */
fdprintf(agi->fd, "200 result=%d\n", chan->_state);
return RESULT_SUCCESS;
} else if (argc==3) {
/* one argument: look for info on the specified channel */
c = ast_channel_walk(NULL);
while (c) {
if (strcasecmp(argv[2],c->name)==0) {
fdprintf(agi->fd, "200 result=%d\n", c->_state);
return RESULT_SUCCESS;
}
c = ast_channel_walk(c);
}
/* if we get this far no channel name matched the argument given */
fdprintf(agi->fd, "200 result=-1\n");
return RESULT_SUCCESS;
} else {
return RESULT_SHOWUSAGE;
}
}
static int handle_setvariable(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
if (argv[3])
pbx_builtin_setvar_helper(chan, argv[2], argv[3]);
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
static int handle_getvariable(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
char *tempstr;
if ((tempstr = pbx_builtin_getvar_helper(chan, argv[2])) )
fdprintf(agi->fd, "200 result=1 (%s)\n", tempstr);
else
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static int handle_verbose(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int level = 0;
char *prefix;
if (argc < 2)
return RESULT_SHOWUSAGE;
if (argv[2])
sscanf(argv[2], "%d", &level);
switch (level) {
case 4:
prefix = VERBOSE_PREFIX_4;
break;
case 3:
prefix = VERBOSE_PREFIX_3;
break;
case 2:
prefix = VERBOSE_PREFIX_2;
break;
case 1:
default:
prefix = VERBOSE_PREFIX_1;
break;
}
if (level <= option_verbose)
ast_verbose("%s %s: %s\n", prefix, chan->data, argv[1]);
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
static int handle_dbget(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int res;
char tmp[256];
if (argc != 4)
return RESULT_SHOWUSAGE;
res = ast_db_get(argv[2], argv[3], tmp, sizeof(tmp));
if (res)
fdprintf(agi->fd, "200 result=0\n");
else
fdprintf(agi->fd, "200 result=1 (%s)\n", tmp);
return RESULT_SUCCESS;
}
static int handle_dbput(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int res;
if (argc != 5)
return RESULT_SHOWUSAGE;
res = ast_db_put(argv[2], argv[3], argv[4]);
if (res)
fdprintf(agi->fd, "200 result=0\n");
else
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
static int handle_dbdel(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int res;
if (argc != 4)
return RESULT_SHOWUSAGE;
res = ast_db_del(argv[2], argv[3]);
if (res)
fdprintf(agi->fd, "200 result=0\n");
else
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
static int handle_dbdeltree(struct ast_channel *chan, AGI *agi, int argc, char **argv)
{
int res;
if ((argc < 3) || (argc > 4))
return RESULT_SHOWUSAGE;
if (argc == 4)
res = ast_db_deltree(argv[2], argv[3]);
else
res = ast_db_deltree(argv[2], NULL);
if (res)
fdprintf(agi->fd, "200 result=0\n");
else
fdprintf(agi->fd, "200 result=1\n");
return RESULT_SUCCESS;
}
static int handle_noop(struct ast_channel *chan, AGI *agi, int arg, char *argv[])
{
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static int handle_setmusic(struct ast_channel *chan, AGI *agi, int argc, char *argv[])
{
if (!strncasecmp(argv[2],"on",2)) {
if (argc > 3)
ast_moh_start(chan, argv[3]);
else
ast_moh_start(chan, NULL);
}
if (!strncasecmp(argv[2],"off",3)) {
ast_moh_stop(chan);
}
fdprintf(agi->fd, "200 result=0\n");
return RESULT_SUCCESS;
}
static char usage_setmusic[] =
" Usage: SET MUSIC ON <on|off> <class>\n"
" Enables/Disables the music on hold generator. If <class> is\n"
" not specified then the default music on hold class will be used.\n"
" Always returns 0\n";
static char usage_dbput[] =
" Usage: DATABASE PUT <family> <key> <value>\n"
" Adds or updates an entry in the Asterisk database for a\n"
" given family, key, and value.\n"
" Returns 1 if succesful, 0 otherwise\n";
static char usage_dbget[] =
" Usage: DATABASE GET <family> <key>\n"
" Retrieves an entry in the Asterisk database for a\n"
" given family and key.\n"
" Returns 0 if <key> is not set. Returns 1 if <key>\n"
" is set and returns the variable in parenthesis\n"
" example return code: 200 result=1 (testvariable)\n";
static char usage_dbdel[] =
" Usage: DATABASE DEL <family> <key>\n"
" Deletes an entry in the Asterisk database for a\n"
" given family and key.\n"
" Returns 1 if succesful, 0 otherwise\n";
static char usage_dbdeltree[] =
" Usage: DATABASE DELTREE <family> [keytree]\n"
" Deletes a family or specific keytree withing a family\n"
" in the Asterisk database.\n"
" Returns 1 if succesful, 0 otherwise\n";
static char usage_verbose[] =
" Usage: VERBOSE <message> <level>\n"
" Sends <message> to the console via verbose message system.\n"
" <level> is the the verbose level (1-4)\n"
" Always returns 1\n";
static char usage_getvariable[] =
" Usage: GET VARIABLE <variablename>\n"
" Returns 0 if <variablename> is not set. Returns 1 if <variablename>\n"
" is set and returns the variable in parenthesis\n"
" example return code: 200 result=1 (testvariable)\n";
static char usage_setvariable[] =
" Usage: SET VARIABLE <variablename> <value>\n";
static char usage_channelstatus[] =
" Usage: CHANNEL STATUS [<channelname>]\n"
" Returns the status of the specified channel.\n"
" If no channel name is given the returns the status of the\n"
" current channel.\n"
" Return values:\n"
" 0 Channel is down and available\n"
" 1 Channel is down, but reserved\n"
" 2 Channel is off hook\n"
" 3 Digits (or equivalent) have been dialed\n"
" 4 Line is ringing\n"
" 5 Remote end is ringing\n"
" 6 Line is up\n"
" 7 Line is busy\n";
static char usage_setcallerid[] =
" Usage: SET CALLERID <number>\n"
" Changes the callerid of the current channel.\n";
static char usage_exec[] =
" Usage: EXEC <application> <options>\n"
" Executes <application> with given <options>.\n"
" Returns whatever the application returns, or -2 on failure to find application\n";
static char usage_hangup[] =
" Usage: HANGUP [<channelname>]\n"
" Hangs up the specified channel.\n"
" If no channel name is given, hangs up the current channel\n";
static char usage_answer[] =
" Usage: ANSWER\n"
" Answers channel if not already in answer state. Returns -1 on\n"
" channel failure, or 0 if successful.\n";
static char usage_waitfordigit[] =
" Usage: WAIT FOR DIGIT <timeout>\n"
" Waits up to 'timeout' milliseconds for channel to receive a DTMF digit.\n"
" Returns -1 on channel failure, 0 if no digit is received in the timeout, or\n"
" the numerical value of the ascii of the digit if one is received. Use -1\n"
" for the timeout value if you desire the call to block indefinitely.\n";
static char usage_sendtext[] =
" Usage: SEND TEXT \"<text to send>\"\n"
" Sends the given text on a channel. Most channels do not support the\n"
" transmission of text. Returns 0 if text is sent, or if the channel does not\n"
" support text transmission. Returns -1 only on error/hangup. Text\n"
" consisting of greater than one word should be placed in quotes since the\n"
" command only accepts a single argument.\n";
static char usage_recvchar[] =
" Usage: RECEIVE CHAR <timeout>\n"
" Receives a character of text on a channel. Specify timeout to be the\n"
" maximum time to wait for input in milliseconds, or 0 for infinite. Most channels\n"
" do not support the reception of text. Returns the decimal value of the character\n"
" if one is received, or 0 if the channel does not support text reception. Returns\n"
" -1 only on error/hangup.\n";
static char usage_tddmode[] =
" Usage: TDD MODE <on|off>\n"
" Enable/Disable TDD transmission/reception on a channel. Returns 1 if\n"
" successful, or 0 if channel is not TDD-capable.\n";
static char usage_sendimage[] =
" Usage: SEND IMAGE <image>\n"
" Sends the given image on a channel. Most channels do not support the\n"
" transmission of images. Returns 0 if image is sent, or if the channel does not\n"
" support image transmission. Returns -1 only on error/hangup. Image names\n"
" should not include extensions.\n";
static char usage_streamfile[] =
" Usage: STREAM FILE <filename> <escape digits> [sample offset]\n"
" Send the given file, allowing playback to be interrupted by the given\n"
" digits, if any. Use double quotes for the digits if you wish none to be\n"
" permitted. If sample offset is provided then the audio will seek to sample\n"
" offset before play starts. Returns 0 if playback completes without a digit\n"
" being pressed, or the ASCII numerical value of the digit if one was pressed,\n"
" or -1 on error or if the channel was disconnected. Remember, the file\n"
" extension must not be included in the filename.\n";
static char usage_saynumber[] =
" Usage: SAY NUMBER <number> <escape digits>\n"
" Say a given number, returning early if any of the given DTMF digits\n"
" are received on the channel. Returns 0 if playback completes without a digit\n"
" being pressed, or the ASCII numerical value of the digit if one was pressed or\n"
" -1 on error/hangup.\n";
static char usage_saydigits[] =
" Usage: SAY DIGITS <number> <escape digits>\n"
" Say a given digit string, returning early if any of the given DTMF digits\n"
" are received on the channel. Returns 0 if playback completes without a digit\n"
" being pressed, or the ASCII numerical value of the digit if one was pressed or\n"
" -1 on error/hangup.\n";
static char usage_getdata[] =
" Usage: GET DATA <file to be streamed> [timeout] [max digits]\n"
" Stream the given file, and recieve DTMF data. Returns the digits recieved\n"
"from the channel at the other end.\n";
static char usage_setcontext[] =
" Usage: SET CONTEXT <desired context>\n"
" Sets the context for continuation upon exiting the application.\n";
static char usage_setextension[] =
" Usage: SET EXTENSION <new extension>\n"
" Changes the extension for continuation upon exiting the application.\n";
static char usage_setpriority[] =
" Usage: SET PRIORITY <num>\n"
" Changes the priority for continuation upon exiting the application.\n";
static char usage_recordfile[] =
" Usage: RECORD FILE <filename> <format> <escape digits> <timeout> [offset samples] [BEEP] [s=silence]\n"
" Record to a file until a given dtmf digit in the sequence is received\n"
" Returns -1 on hangup or error. The format will specify what kind of file\n"
" will be recorded. The timeout is the maximum record time in milliseconds, or\n"
" -1 for no timeout. Offset samples is optional, and if provided will seek to\n"
" the offset without exceeding the end of the file. \"silence\" is the number\n"
" of seconds of silence allowed before the function returns despite the\n"
" lack of dtmf digits or reaching timeout. Silence value must be\n"
" preceeded by \"s=\" and is optional.\n";
static char usage_autohangup[] =
" Usage: SET AUTOHANGUP <time>\n"
" Cause the channel to automatically hangup at <time> seconds in the\n"
"future. Of course it can be hungup before then as well. Setting to\n"
"0 will cause the autohangup feature to be disabled on this channel.\n";
static char usage_noop[] =
" Usage: NOOP\n"
" Does nothing.\n";
static agi_command commands[] = {
{ { "answer", NULL }, handle_answer, "Asserts answer", usage_answer },
{ { "wait", "for", "digit", NULL }, handle_waitfordigit, "Waits for a digit to be pressed", usage_waitfordigit },
{ { "send", "text", NULL }, handle_sendtext, "Sends text to channels supporting it", usage_sendtext },
{ { "receive", "char", NULL }, handle_recvchar, "Receives text from channels supporting it", usage_recvchar },
{ { "tdd", "mode", NULL }, handle_tddmode, "Sends text to channels supporting it", usage_tddmode },
{ { "stream", "file", NULL }, handle_streamfile, "Sends audio file on channel", usage_streamfile },
{ { "send", "image", NULL }, handle_sendimage, "Sends images to channels supporting it", usage_sendimage },
{ { "say", "digits", NULL }, handle_saydigits, "Says a given digit string", usage_saydigits },
{ { "say", "number", NULL }, handle_saynumber, "Says a given number", usage_saynumber },
{ { "get", "data", NULL }, handle_getdata, "Gets data on a channel", usage_getdata },
{ { "set", "context", NULL }, handle_setcontext, "Sets channel context", usage_setcontext },
{ { "set", "extension", NULL }, handle_setextension, "Changes channel extension", usage_setextension },
{ { "set", "priority", NULL }, handle_setpriority, "Prioritizes the channel", usage_setpriority },
{ { "record", "file", NULL }, handle_recordfile, "Records to a given file", usage_recordfile },
{ { "set", "autohangup", NULL }, handle_autohangup, "Autohangup channel in some time", usage_autohangup },
{ { "hangup", NULL }, handle_hangup, "Hangup the current channel", usage_hangup },
{ { "exec", NULL }, handle_exec, "Executes a given Application", usage_exec },
{ { "set", "callerid", NULL }, handle_setcallerid, "Sets callerid for the current channel", usage_setcallerid },
{ { "channel", "status", NULL }, handle_channelstatus, "Returns status of the connected channel", usage_channelstatus },
{ { "set", "variable", NULL }, handle_setvariable, "Sets a channel variable", usage_setvariable },
{ { "get", "variable", NULL }, handle_getvariable, "Gets a channel variable", usage_getvariable },
{ { "verbose", NULL }, handle_verbose, "Logs a message to the asterisk verbose log", usage_verbose },
{ { "database", "get", NULL }, handle_dbget, "Gets database value", usage_dbget },
{ { "database", "put", NULL }, handle_dbput, "Adds/updates database value", usage_dbput },
{ { "database", "del", NULL }, handle_dbdel, "Removes database key/value", usage_dbdel },
{ { "database", "deltree", NULL }, handle_dbdeltree, "Removes database keytree/value", usage_dbdeltree },
{ { "noop", NULL }, handle_noop, "Does nothing", usage_noop },
{ { "set", "music", NULL }, handle_setmusic, "Enable/Disable Music on hold generator", usage_setmusic }
};
static void join(char *s, int len, char *w[])
{
int x;
/* Join words into a string */
strcpy(s, "");
for (x=0;w[x];x++) {
if (x)
strncat(s, " ", len - strlen(s));
strncat(s, w[x], len - strlen(s));
}
}
static int help_workhorse(int fd, char *match[])
{
char fullcmd[80];
char matchstr[80];
int x;
struct agi_command *e;
if (match)
join(matchstr, sizeof(matchstr), match);
for (x=0;x<sizeof(commands)/sizeof(commands[0]);x++) {
e = &commands[x];
if (e)
join(fullcmd, sizeof(fullcmd), e->cmda);
/* Hide commands that start with '_' */
if (fullcmd[0] == '_')
continue;
if (match) {
if (strncasecmp(matchstr, fullcmd, strlen(matchstr))) {
continue;
}
}
ast_cli(fd, "%20.20s %s\n", fullcmd, e->summary);
}
return 0;
}
static agi_command *find_command(char *cmds[], int exact)
{
int x;
int y;
int match;
for (x=0;x < sizeof(commands) / sizeof(commands[0]);x++) {
/* start optimistic */
match = 1;
for (y=0;match && cmds[y]; y++) {
/* If there are no more words in the command (and we're looking for
an exact match) or there is a difference between the two words,
then this is not a match */
if (!commands[x].cmda[y] && !exact)
break;
/* don't segfault if the next part of a command doesn't exist */
if (!commands[x].cmda[y]) return NULL;
if (strcasecmp(commands[x].cmda[y], cmds[y]))
match = 0;
}
/* If more words are needed to complete the command then this is not
a candidate (unless we're looking for a really inexact answer */
if ((exact > -1) && commands[x].cmda[y])
match = 0;
if (match)
return &commands[x];
}
return NULL;
}
static int parse_args(char *s, int *max, char *argv[])
{
int x=0;
int quoted=0;
int escaped=0;
int whitespace=1;
char *cur;
cur = s;
while(*s) {
switch(*s) {
case '"':
/* If it's escaped, put a literal quote */
if (escaped)
goto normal;
else
quoted = !quoted;
if (quoted && whitespace) {
/* If we're starting a quote, coming off white space start a new word, too */
argv[x++] = cur;
whitespace=0;
}
escaped = 0;
break;
case ' ':
case '\t':
if (!quoted && !escaped) {
/* If we're not quoted, mark this as whitespace, and
end the previous argument */
whitespace = 1;
*(cur++) = '\0';
} else
/* Otherwise, just treat it as anything else */
goto normal;
break;
case '\\':
/* If we're escaped, print a literal, otherwise enable escaping */
if (escaped) {
goto normal;
} else {
escaped=1;
}
break;
default:
normal:
if (whitespace) {
if (x >= MAX_ARGS -1) {
ast_log(LOG_WARNING, "Too many arguments, truncating\n");
break;
}
/* Coming off of whitespace, start the next argument */
argv[x++] = cur;
whitespace=0;
}
*(cur++) = *s;
escaped=0;
}
s++;
}
/* Null terminate */
*(cur++) = '\0';
argv[x] = NULL;
*max = x;
return 0;
}
static int agi_handle_command(struct ast_channel *chan, AGI *agi, char *buf)
{
char *argv[MAX_ARGS];
int argc = 0;
int res;
agi_command *c;
argc = MAX_ARGS;
parse_args(buf, &argc, argv);
#if 0
{ int x;
for (x=0;x<argc;x++)
fprintf(stderr, "Got Arg%d: %s\n", x, argv[x]); }
#endif
c = find_command(argv, 0);
if (c) {
res = c->handler(chan, agi, argc, argv);
switch(res) {
case RESULT_SHOWUSAGE:
fdprintf(agi->fd, "520-Invalid command syntax. Proper usage follows:\n");
fdprintf(agi->fd, c->usage);
fdprintf(agi->fd, "520 End of proper usage.\n");
break;
case RESULT_FAILURE:
/* They've already given the failure. We've been hung up on so handle this
appropriately */
return -1;
}
} else {
fdprintf(agi->fd, "510 Invalid or unknown command\n");
}
return 0;
}
#define RETRY 3
static int run_agi(struct ast_channel *chan, char *request, AGI *agi, int pid)
{
struct ast_channel *c;
int outfd;
int ms;
int returnstatus = 0;
struct ast_frame *f;
char buf[2048];
FILE *readf;
//how many times we'll retry if ast_waitfor_nandfs will return without either channel or file descriptor in case select is interrupted by a system call (EINTR)
int retry = RETRY;
if (!(readf = fdopen(agi->ctrl, "r"))) {
ast_log(LOG_WARNING, "Unable to fdopen file descriptor\n");
kill(pid, SIGHUP);
return -1;
}
setlinebuf(readf);
setup_env(chan, request, agi->fd, (agi->audio > -1));
for (;;) {
ms = -1;
c = ast_waitfor_nandfds(&chan, 1, &agi->ctrl, 1, NULL, &outfd, &ms);
if (c) {
retry = RETRY;
/* Idle the channel until we get a command */
f = ast_read(c);
if (!f) {
ast_log(LOG_DEBUG, "%s hungup\n", chan->name);
returnstatus = -1;
break;
} else {
/* If it's voice, write it to the audio pipe */
if ((agi->audio > -1) && (f->frametype == AST_FRAME_VOICE)) {
/* Write, ignoring errors */
write(agi->audio, f->data, f->datalen);
}
ast_frfree(f);
}
} else if (outfd > -1) {
retry = RETRY;
if (!fgets(buf, sizeof(buf), readf)) {
/* Program terminated */
if (returnstatus)
returnstatus = -1;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "AGI Script %s completed, returning %d\n", request, returnstatus);
/* No need to kill the pid anymore, since they closed us */
pid = -1;
break;
}
/* get rid of trailing newline, if any */
if (*buf && buf[strlen(buf) - 1] == '\n')
buf[strlen(buf) - 1] = 0;
returnstatus |= agi_handle_command(chan, agi, buf);
/* If the handle_command returns -1, we need to stop */
if (returnstatus < 0) {
break;
}
} else {
if (--retry <= 0) {
ast_log(LOG_WARNING, "No channel, no fd?\n");
returnstatus = -1;
break;
}
}
}
/* Notify process */
if (pid > -1)
kill(pid, SIGHUP);
fclose(readf);
return returnstatus;
}
static int handle_showagi(int fd, int argc, char *argv[]) {
struct agi_command *e;
char fullcmd[80];
if ((argc < 2))
return RESULT_SHOWUSAGE;
if (argc > 2) {
e = find_command(argv + 2, 1);
if (e)
ast_cli(fd, e->usage);
else {
if (find_command(argv + 2, -1)) {
return help_workhorse(fd, argv + 1);
} else {
join(fullcmd, sizeof(fullcmd), argv+1);
ast_cli(fd, "No such command '%s'.\n", fullcmd);
}
}
} else {
return help_workhorse(fd, NULL);
}
return RESULT_SUCCESS;
}
static int handle_dumpagihtml(int fd, int argc, char *argv[]) {
struct agi_command *e;
char fullcmd[80];
char *tempstr;
int x;
FILE *htmlfile;
if ((argc < 3))
return RESULT_SHOWUSAGE;
if (!(htmlfile = fopen(argv[2], "wt"))) {
ast_cli(fd, "Could not create file '%s'\n", argv[2]);
return RESULT_SHOWUSAGE;
}
fprintf(htmlfile, "<HTML>\n<HEAD>\n<TITLE>AGI Commands</TITLE>\n</HEAD>\n");
fprintf(htmlfile, "<BODY>\n<CENTER><B><H1>AGI Commands</H1></B></CENTER>\n\n");
fprintf(htmlfile, "<TABLE BORDER=\"0\" CELLSPACING=\"10\">\n");
for (x=0;x<sizeof(commands)/sizeof(commands[0]);x++) {
char *stringp=NULL;
e = &commands[x];
if (e)
join(fullcmd, sizeof(fullcmd), e->cmda);
/* Hide commands that start with '_' */
if (fullcmd[0] == '_')
continue;
fprintf(htmlfile, "<TR><TD><TABLE BORDER=\"1\" CELLPADDING=\"5\" WIDTH=\"100%%\">\n");
fprintf(htmlfile, "<TR><TH ALIGN=\"CENTER\"><B>%s - %s</B></TD></TR>\n", fullcmd,e->summary);
stringp=e->usage;
tempstr = strsep(&stringp, "\n");
fprintf(htmlfile, "<TR><TD ALIGN=\"CENTER\">%s</TD></TR>\n", tempstr);
fprintf(htmlfile, "<TR><TD ALIGN=\"CENTER\">\n");
while ((tempstr = strsep(&stringp, "\n")) != NULL) {
fprintf(htmlfile, "%s<BR>\n",tempstr);
}
fprintf(htmlfile, "</TD></TR>\n");
fprintf(htmlfile, "</TABLE></TD></TR>\n\n");
}
fprintf(htmlfile, "</TABLE>\n</BODY>\n</HTML>\n");
fclose(htmlfile);
ast_cli(fd, "AGI HTML Commands Dumped to: %s\n", argv[2]);
return RESULT_SUCCESS;
}
static int agi_exec_full(struct ast_channel *chan, void *data, int enhanced)
{
int res=0;
struct localuser *u;
char *args,*ringy;
char tmp[256];
int fds[2];
int efd = -1;
int pid;
char *stringp=tmp;
AGI agi;
if (!data || !strlen(data)) {
ast_log(LOG_WARNING, "AGI requires an argument (script)\n");
return -1;
}
memset(&agi, 0, sizeof(agi));
strncpy(tmp, data, sizeof(tmp)-1);
strsep(&stringp, "|");
args = strsep(&stringp, "|");
ringy = strsep(&stringp,"|");
if (!args)
args = "";
LOCAL_USER_ADD(u);
#if 0
/* Answer if need be */
if (chan->_state != AST_STATE_UP) {
if (ringy) { /* if for ringing first */
/* a little ringy-dingy first */
ast_indicate(chan, AST_CONTROL_RINGING);
sleep(3);
}
if (ast_answer(chan)) {
LOCAL_USER_REMOVE(u);
return -1;
}
}
#endif
res = launch_script(tmp, args, fds, enhanced ? &efd : NULL, &pid);
if (!res) {
agi.fd = fds[1];
agi.ctrl = fds[0];
agi.audio = efd;
res = run_agi(chan, tmp, &agi, pid);
close(fds[0]);
close(fds[1]);
if (efd > -1)
close(efd);
}
LOCAL_USER_REMOVE(u);
return res;
}
static int agi_exec(struct ast_channel *chan, void *data)
{
return agi_exec_full(chan, data, 0);
}
static int eagi_exec(struct ast_channel *chan, void *data)
{
int readformat;
int res;
readformat = chan->readformat;
if (ast_set_read_format(chan, AST_FORMAT_SLINEAR)) {
ast_log(LOG_WARNING, "Unable to set channel '%s' to linear mode\n", chan->name);
return -1;
}
res = agi_exec_full(chan, data, 1);
if (!res) {
if (ast_set_read_format(chan, readformat)) {
ast_log(LOG_WARNING, "Unable to restore channel '%s' to format %s\n", chan->name, ast_getformatname(readformat));
}
}
return res;
}
static char showagi_help[] =
"Usage: show agi [topic]\n"
" When called with a topic as an argument, displays usage\n"
" information on the given command. If called without a\n"
" topic, it provides a list of AGI commands.\n";
static char dumpagihtml_help[] =
"Usage: dump agihtml <filename>\n"
" Dumps the agi command list in html format to given filename\n";
static struct ast_cli_entry showagi =
{ { "show", "agi", NULL }, handle_showagi, "Show AGI commands or specific help", showagi_help };
static struct ast_cli_entry dumpagihtml =
{ { "dump", "agihtml", NULL }, handle_dumpagihtml, "Dumps a list of agi command in html format", dumpagihtml_help };
int unload_module(void)
{
STANDARD_HANGUP_LOCALUSERS;
ast_cli_unregister(&showagi);
ast_cli_unregister(&dumpagihtml);
ast_unregister_application(eapp);
return ast_unregister_application(app);
}
int load_module(void)
{
ast_cli_register(&showagi);
ast_cli_register(&dumpagihtml);
ast_register_application(eapp, eagi_exec, synopsis, descrip);
return ast_register_application(app, agi_exec, synopsis, descrip);
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
int res;
STANDARD_USECOUNT(res);
return res;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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