mirror of
https://github.com/asterisk/asterisk.git
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7e8835e0d7
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89512 65c4cc65-6c06-0410-ace0-fbb531ad65f3
364 lines
9.1 KiB
C
364 lines
9.1 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* Modified from app_zapbarge by David Troy <dave@toad.net>
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*
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* Special thanks to comphealth.com for sponsoring this
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* GPL application.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Zap Scanner
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<depend>zaptel</depend>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/zapata.h"
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/config.h"
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#include "asterisk/app.h"
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#include "asterisk/utils.h"
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#include "asterisk/cli.h"
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#include "asterisk/say.h"
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static char *app = "ZapScan";
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static char *synopsis = "Scan Zap channels to monitor calls";
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static char *descrip =
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" ZapScan([group]) allows a call center manager to monitor Zap channels in\n"
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"a convenient way. Use '#' to select the next channel and use '*' to exit\n"
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"Limit scanning to a channel GROUP by setting the option group argument.\n";
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#define CONF_SIZE 160
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static struct ast_channel *get_zap_channel_locked(int num) {
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char name[80];
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snprintf(name,sizeof(name),"Zap/%d-1",num);
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return ast_get_channel_by_name_locked(name);
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}
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static int careful_write(int fd, unsigned char *data, int len)
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{
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int res;
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while(len) {
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res = write(fd, data, len);
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if (res < 1) {
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if (errno != EAGAIN) {
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ast_log(LOG_WARNING, "Failed to write audio data to conference: %s\n", strerror(errno));
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return -1;
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} else
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return 0;
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}
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len -= res;
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data += res;
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}
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return 0;
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}
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static int conf_run(struct ast_channel *chan, int confno, int confflags)
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{
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int fd;
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struct zt_confinfo ztc;
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struct ast_frame *f;
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struct ast_channel *c;
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struct ast_frame fr;
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int outfd;
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int ms;
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int nfds;
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int res;
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int flags;
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int retryzap;
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int origfd;
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int ret = -1;
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char input[4];
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int ic=0;
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ZT_BUFFERINFO bi;
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char __buf[CONF_SIZE + AST_FRIENDLY_OFFSET];
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char *buf = __buf + AST_FRIENDLY_OFFSET;
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/* Set it into U-law mode (write) */
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if (ast_set_write_format(chan, AST_FORMAT_ULAW) < 0) {
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ast_log(LOG_WARNING, "Unable to set '%s' to write ulaw mode\n", chan->name);
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goto outrun;
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}
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/* Set it into U-law mode (read) */
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if (ast_set_read_format(chan, AST_FORMAT_ULAW) < 0) {
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ast_log(LOG_WARNING, "Unable to set '%s' to read ulaw mode\n", chan->name);
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goto outrun;
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}
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ast_indicate(chan, -1);
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retryzap = strcasecmp(chan->tech->type, "Zap");
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zapretry:
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origfd = chan->fds[0];
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if (retryzap) {
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fd = open("/dev/zap/pseudo", O_RDWR);
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if (fd < 0) {
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ast_log(LOG_WARNING, "Unable to open pseudo channel: %s\n", strerror(errno));
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goto outrun;
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}
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/* Make non-blocking */
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flags = fcntl(fd, F_GETFL);
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if (flags < 0) {
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ast_log(LOG_WARNING, "Unable to get flags: %s\n", strerror(errno));
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close(fd);
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goto outrun;
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}
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if (fcntl(fd, F_SETFL, flags | O_NONBLOCK)) {
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ast_log(LOG_WARNING, "Unable to set flags: %s\n", strerror(errno));
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close(fd);
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goto outrun;
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}
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/* Setup buffering information */
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memset(&bi, 0, sizeof(bi));
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bi.bufsize = CONF_SIZE;
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bi.txbufpolicy = ZT_POLICY_IMMEDIATE;
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bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
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bi.numbufs = 4;
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if (ioctl(fd, ZT_SET_BUFINFO, &bi)) {
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ast_log(LOG_WARNING, "Unable to set buffering information: %s\n", strerror(errno));
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close(fd);
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goto outrun;
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}
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nfds = 1;
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} else {
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/* XXX Make sure we're not running on a pseudo channel XXX */
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fd = chan->fds[0];
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nfds = 0;
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}
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memset(&ztc, 0, sizeof(ztc));
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/* Check to see if we're in a conference... */
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ztc.chan = 0;
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if (ioctl(fd, ZT_GETCONF, &ztc)) {
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ast_log(LOG_WARNING, "Error getting conference\n");
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close(fd);
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goto outrun;
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}
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if (ztc.confmode) {
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/* Whoa, already in a conference... Retry... */
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if (!retryzap) {
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ast_debug(1, "Zap channel is in a conference already, retrying with pseudo\n");
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retryzap = 1;
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goto zapretry;
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}
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}
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memset(&ztc, 0, sizeof(ztc));
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/* Add us to the conference */
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ztc.chan = 0;
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ztc.confno = confno;
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ztc.confmode = ZT_CONF_MONITORBOTH;
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if (ioctl(fd, ZT_SETCONF, &ztc)) {
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ast_log(LOG_WARNING, "Error setting conference\n");
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close(fd);
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goto outrun;
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}
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ast_debug(1, "Placed channel %s in ZAP channel %d monitor\n", chan->name, confno);
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for(;;) {
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outfd = -1;
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ms = -1;
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c = ast_waitfor_nandfds(&chan, 1, &fd, nfds, NULL, &outfd, &ms);
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if (c) {
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if (c->fds[0] != origfd) {
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if (retryzap) {
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/* Kill old pseudo */
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close(fd);
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}
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ast_debug(1, "Ooh, something swapped out under us, starting over\n");
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retryzap = 0;
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goto zapretry;
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}
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f = ast_read(c);
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if (!f)
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break;
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if(f->frametype == AST_FRAME_DTMF) {
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if(f->subclass == '#') {
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ret = 0;
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break;
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}
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else if (f->subclass == '*') {
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ret = -1;
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break;
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}
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else {
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input[ic++] = f->subclass;
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}
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if(ic == 3) {
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input[ic++] = '\0';
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ic=0;
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ret = atoi(input);
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ast_verb(3, "Zapscan: change channel to %d\n",ret);
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break;
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}
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}
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if (fd != chan->fds[0]) {
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if (f->frametype == AST_FRAME_VOICE) {
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if (f->subclass == AST_FORMAT_ULAW) {
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/* Carefully write */
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careful_write(fd, f->data, f->datalen);
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} else
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ast_log(LOG_WARNING, "Huh? Got a non-ulaw (%d) frame in the conference\n", f->subclass);
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}
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}
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ast_frfree(f);
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} else if (outfd > -1) {
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res = read(outfd, buf, CONF_SIZE);
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if (res > 0) {
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memset(&fr, 0, sizeof(fr));
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fr.frametype = AST_FRAME_VOICE;
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fr.subclass = AST_FORMAT_ULAW;
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fr.datalen = res;
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fr.samples = res;
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fr.data = buf;
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fr.offset = AST_FRIENDLY_OFFSET;
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if (ast_write(chan, &fr) < 0) {
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ast_log(LOG_WARNING, "Unable to write frame to channel: %s\n", strerror(errno));
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/* break; */
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}
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} else
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ast_log(LOG_WARNING, "Failed to read frame: %s\n", strerror(errno));
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}
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}
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if (f)
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ast_frfree(f);
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if (fd != chan->fds[0])
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close(fd);
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else {
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/* Take out of conference */
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/* Add us to the conference */
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ztc.chan = 0;
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ztc.confno = 0;
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ztc.confmode = 0;
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if (ioctl(fd, ZT_SETCONF, &ztc)) {
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ast_log(LOG_WARNING, "Error setting conference\n");
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}
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}
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outrun:
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return ret;
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}
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static int conf_exec(struct ast_channel *chan, void *data)
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{
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int res=-1;
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int confflags = 0;
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int confno = 0;
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char confstr[80] = "", *tmp = NULL;
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struct ast_channel *tempchan = NULL, *lastchan = NULL,*ichan = NULL;
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struct ast_frame *f;
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char *desired_group;
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int input=0,search_group=0;
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if (chan->_state != AST_STATE_UP)
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ast_answer(chan);
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desired_group = ast_strdupa(data);
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if(!ast_strlen_zero(desired_group)) {
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ast_verb(3, "Scanning for group %s\n", desired_group);
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search_group = 1;
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}
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for (;;) {
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if (ast_waitfor(chan, 100) < 0)
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break;
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f = ast_read(chan);
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if (!f)
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break;
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if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '*')) {
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ast_frfree(f);
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break;
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}
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ast_frfree(f);
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ichan = NULL;
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if(input) {
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ichan = get_zap_channel_locked(input);
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input = 0;
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}
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tempchan = ichan ? ichan : ast_channel_walk_locked(tempchan);
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if ( !tempchan && !lastchan )
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break;
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if (tempchan && search_group) {
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const char *mygroup;
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if((mygroup = pbx_builtin_getvar_helper(tempchan, "GROUP")) && (!strcmp(mygroup, desired_group))) {
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ast_verb(3, "Found Matching Channel %s in group %s\n", tempchan->name, desired_group);
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} else {
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ast_channel_unlock(tempchan);
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lastchan = tempchan;
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continue;
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}
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}
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if (tempchan && (!strcmp(tempchan->tech->type, "Zap")) && (tempchan != chan) ) {
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ast_verb(3, "Zap channel %s is in-use, monitoring...\n", tempchan->name);
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ast_copy_string(confstr, tempchan->name, sizeof(confstr));
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ast_channel_unlock(tempchan);
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if ((tmp = strchr(confstr,'-'))) {
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*tmp = '\0';
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}
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confno = atoi(strchr(confstr,'/') + 1);
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ast_stopstream(chan);
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ast_say_number(chan, confno, AST_DIGIT_ANY, chan->language, (char *) NULL);
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res = conf_run(chan, confno, confflags);
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if (res<0) break;
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input = res;
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} else if (tempchan)
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ast_channel_unlock(tempchan);
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lastchan = tempchan;
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}
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application(app, conf_exec, synopsis, descrip);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Scan Zap channels application");
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