git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@10241 65c4cc65-6c06-0410-ace0-fbb531ad65f3
589 lines
14 KiB
C
589 lines
14 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2005 Anthony Minessale II (anthmct@yahoo.com)
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* Copyright (C) 2005 - 2006, Digium, Inc.
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*
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* Disclaimed to Digium
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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 ChanSpy: Listen in on any channel.
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*
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* \author Anthony Minessale II <anthmct@yahoo.com>
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <ctype.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/chanspy.h"
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#include "asterisk/features.h"
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#include "asterisk/options.h"
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#include "asterisk/app.h"
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#include "asterisk/utils.h"
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#include "asterisk/say.h"
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#include "asterisk/pbx.h"
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#include "asterisk/translate.h"
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#include "asterisk/module.h"
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#include "asterisk/lock.h"
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AST_MUTEX_DEFINE_STATIC(modlock);
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#define AST_NAME_STRLEN 256
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#define ALL_DONE(u, ret) LOCAL_USER_REMOVE(u); return ret;
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#define get_volfactor(x) x ? ((x > 0) ? (1 << x) : ((1 << abs(x)) * -1)) : 0
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static const char *synopsis = "Listen to the audio of an active channel\n";
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static const char *app = "ChanSpy";
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static const char *desc =
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" ChanSpy([chanprefix][|options]): This application is used to listen to the\n"
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"audio from an active Asterisk channel. This includes the audio coming in and\n"
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"out of the channel being spied on. If the 'chanprefix' parameter is specified,\n"
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"only channels beginning with this string will be spied upon.\n"
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" While Spying, the following actions may be performed:\n"
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" - Dialing # cycles the volume level.\n"
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" - Dialing * will stop spying and look for another channel to spy on.\n"
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" - Dialing a series of digits followed by # builds a channel name to append\n"
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" to 'chanprefix'. For example, executing ChanSpy(Agent) and then dialing\n"
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" the digits '1234#' while spying will begin spying on the channel,\n"
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" 'Agent/1234'.\n"
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" Options:\n"
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" b - Only spy on channels involved in a bridged call.\n"
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" g(grp) - Match only channels where their ${SPYGROUP} variable is set to\n"
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" 'grp'.\n"
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" q - Don't play a beep when beginning to spy on a channel.\n"
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" r[(basename)] - Record the session to the monitor spool directory. An\n"
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" optional base for the filename may be specified. The\n"
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" default is 'chanspy'.\n"
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" v([value]) - Adjust the initial volume in the range from -4 to 4. A\n"
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" negative value refers to a quieter setting.\n"
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;
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static const char *chanspy_spy_type = "ChanSpy";
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enum {
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OPTION_QUIET = (1 << 0), /* Quiet, no announcement */
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OPTION_BRIDGED = (1 << 1), /* Only look at bridged calls */
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OPTION_VOLUME = (1 << 2), /* Specify initial volume */
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OPTION_GROUP = (1 << 3), /* Only look at channels in group */
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OPTION_RECORD = (1 << 4), /* Record */
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} chanspy_opt_flags;
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enum {
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OPT_ARG_VOLUME = 0,
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OPT_ARG_GROUP,
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OPT_ARG_RECORD,
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OPT_ARG_ARRAY_SIZE,
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} chanspy_opt_args;
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AST_APP_OPTIONS(chanspy_opts, {
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AST_APP_OPTION('q', OPTION_QUIET),
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AST_APP_OPTION('b', OPTION_BRIDGED),
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AST_APP_OPTION_ARG('v', OPTION_VOLUME, OPT_ARG_VOLUME),
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AST_APP_OPTION_ARG('g', OPTION_GROUP, OPT_ARG_GROUP),
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AST_APP_OPTION_ARG('r', OPTION_RECORD, OPT_ARG_RECORD),
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});
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LOCAL_USER_DECL;
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struct chanspy_translation_helper {
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/* spy data */
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struct ast_channel_spy spy;
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int fd;
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int volfactor;
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};
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static struct ast_channel *local_channel_walk(struct ast_channel *chan)
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{
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struct ast_channel *ret;
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ast_mutex_lock(&modlock);
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if ((ret = ast_channel_walk_locked(chan))) {
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ast_mutex_unlock(&ret->lock);
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}
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ast_mutex_unlock(&modlock);
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return ret;
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}
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static struct ast_channel *local_get_channel_begin_name(char *name)
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{
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struct ast_channel *chan, *ret = NULL;
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ast_mutex_lock(&modlock);
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chan = local_channel_walk(NULL);
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while (chan) {
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if (!strncmp(chan->name, name, strlen(name))) {
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ret = chan;
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break;
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}
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chan = local_channel_walk(chan);
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}
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ast_mutex_unlock(&modlock);
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return ret;
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}
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static void *spy_alloc(struct ast_channel *chan, void *data)
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{
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/* just store the data pointer in the channel structure */
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return data;
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}
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static void spy_release(struct ast_channel *chan, void *data)
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{
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/* nothing to do */
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}
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static int spy_generate(struct ast_channel *chan, void *data, int len, int samples)
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{
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struct chanspy_translation_helper *csth = data;
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struct ast_frame *f;
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if (csth->spy.status != CHANSPY_RUNNING)
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/* Channel is already gone more than likely */
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return -1;
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ast_mutex_lock(&csth->spy.lock);
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f = ast_channel_spy_read_frame(&csth->spy, samples);
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ast_mutex_unlock(&csth->spy.lock);
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if (!f)
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return 0;
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if (ast_write(chan, f)) {
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ast_frfree(f);
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return -1;
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}
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if (csth->fd)
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write(csth->fd, f->data, f->datalen);
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ast_frfree(f);
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return 0;
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}
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static struct ast_generator spygen = {
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.alloc = spy_alloc,
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.release = spy_release,
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.generate = spy_generate,
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};
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static int start_spying(struct ast_channel *chan, struct ast_channel *spychan, struct ast_channel_spy *spy)
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{
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int res;
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struct ast_channel *peer;
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ast_log(LOG_NOTICE, "Attaching %s to %s\n", spychan->name, chan->name);
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ast_mutex_lock(&chan->lock);
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res = ast_channel_spy_add(chan, spy);
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ast_mutex_unlock(&chan->lock);
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if (!res && ast_test_flag(chan, AST_FLAG_NBRIDGE) && (peer = ast_bridged_channel(chan))) {
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ast_softhangup(peer, AST_SOFTHANGUP_UNBRIDGE);
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}
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return res;
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}
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static void stop_spying(struct ast_channel *chan, struct ast_channel_spy *spy)
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{
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/* If our status has changed to DONE, then the channel we're spying on is gone....
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DON'T TOUCH IT!!! RUN AWAY!!! */
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if (spy->status == CHANSPY_DONE)
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return;
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if (!chan)
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return;
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ast_mutex_lock(&chan->lock);
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ast_channel_spy_remove(chan, spy);
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ast_mutex_unlock(&chan->lock);
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};
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/* Map 'volume' levels from -4 through +4 into
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decibel (dB) settings for channel drivers
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*/
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static signed char volfactor_map[] = {
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-24,
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-18,
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-12,
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-6,
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0,
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6,
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12,
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18,
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24,
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};
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/* attempt to set the desired gain adjustment via the channel driver;
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if successful, clear it out of the csth structure so the
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generator will not attempt to do the adjustment itself
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*/
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static void set_volume(struct ast_channel *chan, struct chanspy_translation_helper *csth)
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{
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signed char volume_adjust = volfactor_map[csth->volfactor + 4];
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if (!ast_channel_setoption(chan, AST_OPTION_TXGAIN, &volume_adjust, sizeof(volume_adjust), 0))
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csth->volfactor = 0;
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}
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static int channel_spy(struct ast_channel *chan, struct ast_channel *spyee, int *volfactor, int fd)
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{
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struct chanspy_translation_helper csth;
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int running, res = 0, x = 0;
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char inp[24];
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char *name=NULL;
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struct ast_frame *f;
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running = (chan && !ast_check_hangup(chan) && spyee && !ast_check_hangup(spyee));
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if (running) {
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memset(inp, 0, sizeof(inp));
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name = ast_strdupa(spyee->name);
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if (option_verbose >= 2)
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ast_verbose(VERBOSE_PREFIX_2 "Spying on channel %s\n", name);
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memset(&csth, 0, sizeof(csth));
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ast_set_flag(&csth.spy, CHANSPY_FORMAT_AUDIO);
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ast_set_flag(&csth.spy, CHANSPY_TRIGGER_NONE);
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ast_set_flag(&csth.spy, CHANSPY_MIXAUDIO);
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csth.spy.type = chanspy_spy_type;
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csth.spy.status = CHANSPY_RUNNING;
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csth.spy.read_queue.format = AST_FORMAT_SLINEAR;
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csth.spy.write_queue.format = AST_FORMAT_SLINEAR;
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ast_mutex_init(&csth.spy.lock);
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csth.volfactor = *volfactor;
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set_volume(chan, &csth);
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csth.spy.read_vol_adjustment = csth.volfactor;
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csth.spy.write_vol_adjustment = csth.volfactor;
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csth.fd = fd;
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if (start_spying(spyee, chan, &csth.spy))
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running = 0;
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}
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if (running) {
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running = 1;
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ast_activate_generator(chan, &spygen, &csth);
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while (csth.spy.status == CHANSPY_RUNNING &&
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chan && !ast_check_hangup(chan) &&
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spyee &&
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!ast_check_hangup(spyee) &&
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running == 1 &&
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(res = ast_waitfor(chan, -1) > -1)) {
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if ((f = ast_read(chan))) {
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res = 0;
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if (f->frametype == AST_FRAME_DTMF) {
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res = f->subclass;
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}
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ast_frfree(f);
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if (!res) {
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continue;
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}
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} else {
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break;
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}
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if (x == sizeof(inp)) {
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x = 0;
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}
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if (res < 0) {
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running = -1;
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}
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if (res == 0) {
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continue;
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} else if (res == '*') {
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running = 0;
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} else if (res == '#') {
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if (!ast_strlen_zero(inp)) {
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running = x ? atoi(inp) : -1;
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break;
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} else {
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(*volfactor)++;
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if (*volfactor > 4) {
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*volfactor = -4;
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}
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if (option_verbose > 2) {
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ast_verbose(VERBOSE_PREFIX_3 "Setting spy volume on %s to %d\n", chan->name, *volfactor);
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}
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csth.volfactor = *volfactor;
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set_volume(chan, &csth);
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csth.spy.read_vol_adjustment = csth.volfactor;
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csth.spy.write_vol_adjustment = csth.volfactor;
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}
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} else if (res >= 48 && res <= 57) {
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inp[x++] = res;
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}
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}
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ast_deactivate_generator(chan);
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stop_spying(spyee, &csth.spy);
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if (option_verbose >= 2) {
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ast_verbose(VERBOSE_PREFIX_2 "Done Spying on channel %s\n", name);
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}
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} else {
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running = 0;
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}
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ast_mutex_destroy(&csth.spy.lock);
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return running;
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}
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static int chanspy_exec(struct ast_channel *chan, void *data)
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{
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struct localuser *u;
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struct ast_channel *peer=NULL, *prev=NULL;
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char name[AST_NAME_STRLEN],
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peer_name[AST_NAME_STRLEN + 5],
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*args,
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*ptr = NULL,
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*options = NULL,
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*spec = NULL,
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*argv[5],
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*mygroup = NULL,
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*recbase = NULL;
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int res = -1,
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volfactor = 0,
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silent = 0,
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argc = 0,
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bronly = 0,
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chosen = 0,
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count=0,
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waitms = 100,
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num = 0,
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oldrf = 0,
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oldwf = 0,
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fd = 0;
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struct ast_flags flags;
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signed char zero_volume = 0;
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if (!(args = ast_strdupa(data)))
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return -1;
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LOCAL_USER_ADD(u);
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oldrf = chan->readformat;
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oldwf = chan->writeformat;
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if (ast_set_read_format(chan, AST_FORMAT_SLINEAR) < 0) {
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ast_log(LOG_ERROR, "Could Not Set Read Format.\n");
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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if (ast_set_write_format(chan, AST_FORMAT_SLINEAR) < 0) {
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ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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ast_answer(chan);
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ast_set_flag(chan, AST_FLAG_SPYING); /* so nobody can spy on us while we are spying */
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if ((argc = ast_app_separate_args(args, '|', argv, sizeof(argv) / sizeof(argv[0])))) {
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spec = argv[0];
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if ( argc > 1) {
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options = argv[1];
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}
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if (ast_strlen_zero(spec) || !strcmp(spec, "all")) {
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spec = NULL;
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}
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}
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if (options) {
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char *opts[OPT_ARG_ARRAY_SIZE];
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ast_app_parse_options(chanspy_opts, &flags, opts, options);
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if (ast_test_flag(&flags, OPTION_GROUP)) {
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mygroup = opts[1];
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}
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if (ast_test_flag(&flags, OPTION_RECORD)) {
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if (!(recbase = opts[2])) {
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recbase = "chanspy";
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}
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}
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silent = ast_test_flag(&flags, OPTION_QUIET);
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bronly = ast_test_flag(&flags, OPTION_BRIDGED);
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if (ast_test_flag(&flags, OPTION_VOLUME) && opts[1]) {
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int vol;
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if ((sscanf(opts[0], "%d", &vol) != 1) || (vol > 4) || (vol < -4))
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ast_log(LOG_NOTICE, "Volume factor must be a number between -4 and 4\n");
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else
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volfactor = vol;
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}
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}
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if (recbase) {
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char filename[512];
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snprintf(filename,sizeof(filename),"%s/%s.%d.raw",ast_config_AST_MONITOR_DIR, recbase, (int)time(NULL));
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if ((fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0644)) <= 0) {
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ast_log(LOG_WARNING, "Cannot open %s for recording\n", filename);
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fd = 0;
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}
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}
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for(;;) {
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if (!silent) {
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res = ast_streamfile(chan, "beep", chan->language);
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if (!res)
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res = ast_waitstream(chan, "");
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if (res < 0) {
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ast_clear_flag(chan, AST_FLAG_SPYING);
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break;
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}
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}
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count = 0;
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res = ast_waitfordigit(chan, waitms);
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if (res < 0) {
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ast_clear_flag(chan, AST_FLAG_SPYING);
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break;
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}
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peer = local_channel_walk(NULL);
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prev=NULL;
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while(peer) {
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if (peer != chan) {
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const char *group = NULL;
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int igrp = 1;
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if (peer == prev && !chosen) {
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break;
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}
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chosen = 0;
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group = pbx_builtin_getvar_helper(peer, "SPYGROUP");
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if (mygroup) {
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if (!group || strcmp(mygroup, group)) {
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igrp = 0;
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}
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}
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if (igrp && (!spec || ((strlen(spec) <= strlen(peer->name) &&
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!strncasecmp(peer->name, spec, strlen(spec)))))) {
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if (peer && (!bronly || ast_bridged_channel(peer)) &&
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!ast_check_hangup(peer) && !ast_test_flag(peer, AST_FLAG_SPYING)) {
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int x = 0;
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strncpy(peer_name, "spy-", 5);
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strncpy(peer_name + strlen(peer_name), peer->name, AST_NAME_STRLEN);
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ptr = strchr(peer_name, '/');
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*ptr = '\0';
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ptr++;
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for (x = 0 ; x < strlen(peer_name) ; x++) {
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if (peer_name[x] == '/') {
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break;
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}
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peer_name[x] = tolower(peer_name[x]);
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|
}
|
|
|
|
if (!silent) {
|
|
if (ast_fileexists(peer_name, NULL, NULL) != -1) {
|
|
res = ast_streamfile(chan, peer_name, chan->language);
|
|
if (!res)
|
|
res = ast_waitstream(chan, "");
|
|
if (res)
|
|
break;
|
|
} else
|
|
res = ast_say_character_str(chan, peer_name, "", chan->language);
|
|
if ((num=atoi(ptr)))
|
|
ast_say_digits(chan, atoi(ptr), "", chan->language);
|
|
}
|
|
count++;
|
|
prev = peer;
|
|
res = channel_spy(chan, peer, &volfactor, fd);
|
|
if (res == -1) {
|
|
break;
|
|
} else if (res > 1 && spec) {
|
|
snprintf(name, AST_NAME_STRLEN, "%s/%d", spec, res);
|
|
if ((peer = local_get_channel_begin_name(name))) {
|
|
chosen = 1;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((peer = local_channel_walk(peer)) == NULL) {
|
|
break;
|
|
}
|
|
}
|
|
waitms = count ? 100 : 5000;
|
|
}
|
|
|
|
|
|
if (fd > 0) {
|
|
close(fd);
|
|
}
|
|
|
|
if (oldrf && ast_set_read_format(chan, oldrf) < 0) {
|
|
ast_log(LOG_ERROR, "Could Not Set Read Format.\n");
|
|
}
|
|
|
|
if (oldwf && ast_set_write_format(chan, oldwf) < 0) {
|
|
ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
|
|
}
|
|
|
|
ast_clear_flag(chan, AST_FLAG_SPYING);
|
|
|
|
ast_channel_setoption(chan, AST_OPTION_TXGAIN, &zero_volume, sizeof(zero_volume), 0);
|
|
|
|
ALL_DONE(u, res);
|
|
}
|
|
|
|
int unload_module(void)
|
|
{
|
|
int res;
|
|
|
|
res = ast_unregister_application(app);
|
|
|
|
STANDARD_HANGUP_LOCALUSERS;
|
|
|
|
return res;
|
|
}
|
|
|
|
int load_module(void)
|
|
{
|
|
return ast_register_application(app, chanspy_exec, synopsis, desc);
|
|
}
|
|
|
|
char *description(void)
|
|
{
|
|
return (char *) synopsis;
|
|
}
|
|
|
|
int usecount(void)
|
|
{
|
|
int res;
|
|
STANDARD_USECOUNT(res);
|
|
return res;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|