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asterisk/apps/app_zapscan.c
James Golovich 687b0ebe6e Check tempchan->type in app_zapscan.c (bug 1250) 
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2465 65c4cc65-6c06-0410-ace0-fbb531ad65f3
2004-03-19 03:46:01 +00:00

319 lines
10 KiB
C
Executable File
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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Zap Scanner
*
* Copyright (C) 2003, Digium
*
* Modified from app_zapbarge by David Troy <dave@toad.net>
*
* Mark Spencer <markster@digium.com>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*
* Special thanks to comphealth.com for sponsoring this
* GPL application.
*/
#include <asterisk/lock.h>
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/pbx.h>
#include <asterisk/module.h>
#include <asterisk/config.h>
#include <asterisk/app.h>
#include <asterisk/options.h>
#include <asterisk/cli.h>
#include <asterisk/say.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <pthread.h>
#include <linux/zaptel.h>
static char *tdesc = "Scan Zap channels application";
static char *app = "ZapScan";
static char *synopsis = "Scan Zap channels to monitor calls";
static char *descrip =
" ZapScan allows a call center manager to monitor Zap channels in\n"
"a convenient way. Use '#' to select the next channel and use '*' to exit\n";
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
#define CONF_SIZE 160
static int careful_write(int fd, unsigned char *data, int len)
{
int res;
while(len) {
res = write(fd, data, len);
if (res < 1) {
if (errno != EAGAIN) {
ast_log(LOG_WARNING, "Failed to write audio data to conference: %s\n", strerror(errno));
return -1;
} else
return 0;
}
len -= res;
data += res;
}
return 0;
}
static int conf_run(struct ast_channel *chan, int confno, int confflags)
{
int fd;
struct zt_confinfo ztc;
struct ast_frame *f;
struct ast_channel *c;
struct ast_frame fr;
int outfd;
int ms;
int nfds;
int res;
int flags;
int retryzap;
int origfd;
int ret = -1;
ZT_BUFFERINFO bi;
char __buf[CONF_SIZE + AST_FRIENDLY_OFFSET];
char *buf = __buf + AST_FRIENDLY_OFFSET;
/* Set it into U-law mode (write) */
if (ast_set_write_format(chan, AST_FORMAT_ULAW) < 0) {
ast_log(LOG_WARNING, "Unable to set '%s' to write ulaw mode\n", chan->name);
goto outrun;
}
/* Set it into U-law mode (read) */
if (ast_set_read_format(chan, AST_FORMAT_ULAW) < 0) {
ast_log(LOG_WARNING, "Unable to set '%s' to read ulaw mode\n", chan->name);
goto outrun;
}
ast_indicate(chan, -1);
retryzap = strcasecmp(chan->type, "Zap");
zapretry:
origfd = chan->fds[0];
if (retryzap) {
fd = open("/dev/zap/pseudo", O_RDWR);
if (fd < 0) {
ast_log(LOG_WARNING, "Unable to open pseudo channel: %s\n", strerror(errno));
goto outrun;
}
/* Make non-blocking */
flags = fcntl(fd, F_GETFL);
if (flags < 0) {
ast_log(LOG_WARNING, "Unable to get flags: %s\n", strerror(errno));
close(fd);
goto outrun;
}
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK)) {
ast_log(LOG_WARNING, "Unable to set flags: %s\n", strerror(errno));
close(fd);
goto outrun;
}
/* Setup buffering information */
memset(&bi, 0, sizeof(bi));
bi.bufsize = CONF_SIZE;
bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
bi.numbufs = 4;
if (ioctl(fd, ZT_SET_BUFINFO, &bi)) {
ast_log(LOG_WARNING, "Unable to set buffering information: %s\n", strerror(errno));
close(fd);
goto outrun;
}
nfds = 1;
} else {
/* XXX Make sure we're not running on a pseudo channel XXX */
fd = chan->fds[0];
nfds = 0;
}
memset(&ztc, 0, sizeof(ztc));
/* Check to see if we're in a conference... */
ztc.chan = 0;
if (ioctl(fd, ZT_GETCONF, &ztc)) {
ast_log(LOG_WARNING, "Error getting conference\n");
close(fd);
goto outrun;
}
if (ztc.confmode) {
/* Whoa, already in a conference... Retry... */
if (!retryzap) {
ast_log(LOG_DEBUG, "Zap channel is in a conference already, retrying with pseudo\n");
retryzap = 1;
goto zapretry;
}
}
memset(&ztc, 0, sizeof(ztc));
/* Add us to the conference */
ztc.chan = 0;
ztc.confno = confno;
ztc.confmode = ZT_CONF_MONITORBOTH;
if (ioctl(fd, ZT_SETCONF, &ztc)) {
ast_log(LOG_WARNING, "Error setting conference\n");
close(fd);
goto outrun;
}
ast_log(LOG_DEBUG, "Placed channel %s in ZAP channel %d monitor\n", chan->name, confno);
for(;;) {
outfd = -1;
ms = -1;
c = ast_waitfor_nandfds(&chan, 1, &fd, nfds, NULL, &outfd, &ms);
if (c) {
if (c->fds[0] != origfd) {
if (retryzap) {
/* Kill old pseudo */
close(fd);
}
ast_log(LOG_DEBUG, "Ooh, something swapped out under us, starting over\n");
retryzap = 0;
goto zapretry;
}
f = ast_read(c);
if (!f)
break;
if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
ret = 0;
break;
} else if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '*')) {
ret = -1;
break;
} else if (fd != chan->fds[0]) {
if (f->frametype == AST_FRAME_VOICE) {
if (f->subclass == AST_FORMAT_ULAW) {
/* Carefully write */
careful_write(fd, f->data, f->datalen);
} else
ast_log(LOG_WARNING, "Huh? Got a non-ulaw (%d) frame in the conference\n", f->subclass);
}
}
ast_frfree(f);
} else if (outfd > -1) {
res = read(outfd, buf, CONF_SIZE);
if (res > 0) {
memset(&fr, 0, sizeof(fr));
fr.frametype = AST_FRAME_VOICE;
fr.subclass = AST_FORMAT_ULAW;
fr.datalen = res;
fr.samples = res;
fr.data = buf;
fr.offset = AST_FRIENDLY_OFFSET;
if (ast_write(chan, &fr) < 0) {
ast_log(LOG_WARNING, "Unable to write frame to channel: %s\n", strerror(errno));
/* break; */
}
} else
ast_log(LOG_WARNING, "Failed to read frame: %s\n", strerror(errno));
}
}
if (fd != chan->fds[0])
close(fd);
else {
/* Take out of conference */
/* Add us to the conference */
ztc.chan = 0;
ztc.confno = 0;
ztc.confmode = 0;
if (ioctl(fd, ZT_SETCONF, &ztc)) {
ast_log(LOG_WARNING, "Error setting conference\n");
}
}
outrun:
return ret;
}
static int conf_exec(struct ast_channel *chan, void *data)
{
int res=-1;
struct localuser *u;
int confflags = 0;
int confno = 0;
char confstr[80], *tmp;
struct ast_channel *tempchan = NULL, *lastchan = NULL;
struct ast_frame *f;
LOCAL_USER_ADD(u);
if (chan->_state != AST_STATE_UP)
ast_answer(chan);
for (;;) {
if (ast_waitfor(chan, 100) < 0)
break;
f = ast_read(chan);
if (!f)
break;
if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '*')) {
ast_frfree(f);
break;
}
ast_frfree(f);
tempchan = ast_channel_walk(tempchan);
if ( !tempchan && !lastchan )
break;
if ( tempchan && tempchan->type && (!strcmp(tempchan->type, "Zap")) && (tempchan != chan) ) {
ast_verbose(VERBOSE_PREFIX_3 "Zap channel %s is in-use, monitoring...\n", tempchan->name);
strcpy(confstr, tempchan->name);
if ((tmp = strchr(confstr,'-'))) {
*tmp = '\0';
}
confno = atoi(strchr(confstr,'/') + 1);
ast_stopstream(chan);
ast_say_number(chan, confno, AST_DIGIT_ANY, chan->language);
res = conf_run(chan, confno, confflags);
if (res<0) break;
}
lastchan = tempchan;
}
LOCAL_USER_REMOVE(u);
return res;
}
int unload_module(void)
{
STANDARD_HANGUP_LOCALUSERS;
return ast_unregister_application(app);
}
int load_module(void)
{
return ast_register_application(app, conf_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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