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075a8ad21c
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6177 65c4cc65-6c06-0410-ace0-fbb531ad65f3
711 lines
17 KiB
C
Executable File
711 lines
17 KiB
C
Executable File
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* ChanSpy Listen in on any channel.
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*
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* Copyright (C) 2005 Anthony Minessale II (anthmct@yahoo.com)
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*
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* Disclaimed to Digium
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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
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.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/features.h"
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#include "asterisk/options.h"
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#include "asterisk/slinfactory.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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#define minmax(x,y) x ? (x > y) ? y : ((x < (y * -1)) ? (y * -1) : x) : 0
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static char *synopsis = "Tap into any type of asterisk channel and listen to audio";
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static char *app = "ChanSpy";
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static char *desc = " Chanspy([<scanspec>][|<options>])\n\n"
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"Valid Options:\n"
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" - q: quiet, don't announce channels beep, etc.\n"
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" - b: bridged, only spy on channels involved in a bridged call.\n"
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" - v([-4..4]): adjust the initial volume. (negative is quieter)\n"
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" - g(grp): enforce group. Match only calls where their ${SPYGROUP} is 'grp'.\n"
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" - r[(basename)]: Record session to monitor spool dir (with optional basename, default is 'chanspy')\n\n"
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"If <scanspec> is specified, only channel names *beginning* with that string will be scanned.\n"
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"('all' or an empty string are also both valid <scanspec>)\n\n"
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"While Spying:\n\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 to <scanspec>\n"
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"(e.g. run Chanspy(Agent) and dial 1234# while spying to jump to channel Agent/1234)\n\n"
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"";
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#define OPTION_QUIET (1 << 0) /* Quiet, no announcement */
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#define OPTION_BRIDGED (1 << 1) /* Only look at bridged calls */
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#define OPTION_VOLUME (1 << 2) /* Specify initial volume */
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#define OPTION_GROUP (1 << 3) /* Only look at channels in group */
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#define OPTION_RECORD (1 << 4) /* Record */
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AST_DECLARE_OPTIONS(chanspy_opts,{
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['q'] = { OPTION_QUIET },
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['b'] = { OPTION_BRIDGED },
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['v'] = { OPTION_VOLUME, 1 },
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['g'] = { OPTION_GROUP, 2 },
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['r'] = { OPTION_RECORD, 3 },
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});
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STANDARD_LOCAL_USER;
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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 volfactor;
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int fd;
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struct ast_slinfactory slinfactory[2];
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};
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/* Prototypes */
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static struct ast_channel *local_get_channel_begin_name(char *name);
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static struct ast_channel *local_channel_walk(struct ast_channel *chan);
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static void spy_release(struct ast_channel *chan, void *data);
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static void *spy_alloc(struct ast_channel *chan, void *params);
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static struct ast_frame *spy_queue_shift(struct ast_channel_spy *spy, int qnum);
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static void ast_flush_spy_queue(struct ast_channel_spy *spy);
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static int spy_generate(struct ast_channel *chan, void *data, int len, int samples);
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static void start_spying(struct ast_channel *chan, struct ast_channel *spychan, struct ast_channel_spy *spy);
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static void stop_spying(struct ast_channel *chan, struct ast_channel_spy *spy);
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static int channel_spy(struct ast_channel *chan, struct ast_channel *spyee, int *volfactor, int fd);
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static int chanspy_exec(struct ast_channel *chan, void *data);
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#if 0
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static struct ast_channel *local_get_channel_by_name(char *name)
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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_get_channel_by_name_locked(name))) {
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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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#endif
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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_release(struct ast_channel *chan, void *data)
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{
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struct chanspy_translation_helper *csth = data;
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ast_slinfactory_destroy(&csth->slinfactory[0]);
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ast_slinfactory_destroy(&csth->slinfactory[1]);
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return;
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}
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static void *spy_alloc(struct ast_channel *chan, void *params)
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{
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struct chanspy_translation_helper *csth = params;
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ast_slinfactory_init(&csth->slinfactory[0]);
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ast_slinfactory_init(&csth->slinfactory[1]);
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return params;
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}
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static struct ast_frame *spy_queue_shift(struct ast_channel_spy *spy, int qnum)
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{
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struct ast_frame *f;
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if (qnum < 0 || qnum > 1)
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return NULL;
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f = spy->queue[qnum];
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if (f) {
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spy->queue[qnum] = f->next;
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return f;
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}
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return NULL;
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}
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static void ast_flush_spy_queue(struct ast_channel_spy *spy)
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{
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struct ast_frame *f=NULL;
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int x = 0;
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ast_mutex_lock(&spy->lock);
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for(x=0;x<2;x++) {
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f = NULL;
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while((f = spy_queue_shift(spy, x)))
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ast_frfree(f);
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}
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ast_mutex_unlock(&spy->lock);
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}
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#if 0
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static int extract_audio(short *buf, size_t len, struct ast_trans_pvt *trans, struct ast_frame *fr, int *maxsamp)
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{
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struct ast_frame *f;
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int size, retlen = 0;
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if (trans) {
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if ((f = ast_translate(trans, fr, 0))) {
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size = (f->datalen > len) ? len : f->datalen;
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memcpy(buf, f->data, size);
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retlen = f->datalen;
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ast_frfree(f);
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} else {
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/* your guess is as good as mine why this will happen but it seems to only happen on iax and appears harmless */
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ast_log(LOG_DEBUG, "Failed to translate frame from %s\n", ast_getformatname(fr->subclass));
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}
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} else {
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size = (fr->datalen > len) ? len : fr->datalen;
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memcpy(buf, fr->data, size);
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retlen = fr->datalen;
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}
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if (retlen > 0 && (size = retlen / 2)) {
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if (size > *maxsamp) {
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*maxsamp = size;
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}
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}
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return retlen;
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}
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static int spy_queue_ready(struct ast_channel_spy *spy)
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{
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int res = 0;
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ast_mutex_lock(&spy->lock);
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if (spy->status == CHANSPY_RUNNING) {
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res = (spy->queue[0] && spy->queue[1]) ? 1 : 0;
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} else {
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res = (spy->queue[0] || spy->queue[1]) ? 1 : -1;
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}
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ast_mutex_unlock(&spy->lock);
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return res;
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}
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#endif
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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 frame, *f;
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int len0 = 0, len1 = 0, samp0 = 0, samp1 = 0, x, vf, maxsamp;
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short buf0[1280], buf1[1280], buf[1280];
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if (csth->spy.status == CHANSPY_DONE) {
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return -1;
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}
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ast_mutex_lock(&csth->spy.lock);
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while((f = csth->spy.queue[0])) {
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csth->spy.queue[0] = f->next;
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ast_slinfactory_feed(&csth->slinfactory[0], f);
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ast_frfree(f);
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}
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ast_mutex_unlock(&csth->spy.lock);
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ast_mutex_lock(&csth->spy.lock);
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while((f = csth->spy.queue[1])) {
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csth->spy.queue[1] = f->next;
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ast_slinfactory_feed(&csth->slinfactory[1], f);
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ast_frfree(f);
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}
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ast_mutex_unlock(&csth->spy.lock);
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if (csth->slinfactory[0].size < len || csth->slinfactory[1].size < len) {
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return 0;
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}
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if ((len0 = ast_slinfactory_read(&csth->slinfactory[0], buf0, len))) {
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samp0 = len0 / 2;
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}
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if((len1 = ast_slinfactory_read(&csth->slinfactory[1], buf1, len))) {
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samp1 = len1 / 2;
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}
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maxsamp = (samp0 > samp1) ? samp0 : samp1;
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vf = get_volfactor(csth->volfactor);
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vf = minmax(vf, 16);
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for(x=0; x < maxsamp; x++) {
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if (vf < 0) {
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if (samp0) {
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buf0[x] /= abs(vf);
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}
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if (samp1) {
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buf1[x] /= abs(vf);
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}
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} else if (vf > 0) {
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if (samp0) {
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buf0[x] *= vf;
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}
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if (samp1) {
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buf1[x] *= vf;
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}
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}
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if (samp0 && samp1) {
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if (x < samp0 && x < samp1) {
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buf[x] = buf0[x] + buf1[x];
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} else if (x < samp0) {
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buf[x] = buf0[x];
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} else if (x < samp1) {
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buf[x] = buf1[x];
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}
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} else if (x < samp0) {
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buf[x] = buf0[x];
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} else if (x < samp1) {
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buf[x] = buf1[x];
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}
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}
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memset(&frame, 0, sizeof(frame));
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frame.frametype = AST_FRAME_VOICE;
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frame.subclass = AST_FORMAT_SLINEAR;
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frame.data = buf;
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frame.samples = x;
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frame.datalen = x * 2;
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if (ast_write(chan, &frame)) {
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csth->spy.status = CHANSPY_DONE;
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return -1;
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}
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if (csth->fd) {
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write(csth->fd, buf1, len1);
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}
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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 void start_spying(struct ast_channel *chan, struct ast_channel *spychan, struct ast_channel_spy *spy)
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{
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struct ast_channel_spy *cptr=NULL;
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struct ast_channel *peer;
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ast_log(LOG_WARNING, "Attaching %s to %s\n", spychan->name, chan->name);
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ast_mutex_lock(&chan->lock);
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if (chan->spiers) {
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for(cptr=chan->spiers;cptr && cptr->next;cptr=cptr->next);
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cptr->next = spy;
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} else {
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chan->spiers = spy;
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}
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ast_mutex_unlock(&chan->lock);
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if ( 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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}
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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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struct ast_channel_spy *cptr=NULL, *prev=NULL;
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int count = 0;
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while(ast_mutex_trylock(&chan->lock)) {
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/* if its locked already it's almost surely hanging up and we are too late
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we can safely remove the head pointer if it points at us without needing a lock.
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since everybody spying will be in the same boat whomever is pointing at the head
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will surely erase it which is all we really need since it's a linked list of
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staticly declared structs that belong to each spy.
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*/
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if (chan->spiers == spy) {
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chan->spiers = NULL;
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return;
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}
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count++;
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if (count > 10) {
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return;
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}
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sched_yield();
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}
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for(cptr=chan->spiers; cptr; cptr=cptr->next) {
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if (cptr == spy) {
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if (prev) {
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prev->next = cptr->next;
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cptr->next = NULL;
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} else
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chan->spiers = NULL;
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}
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prev = cptr;
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}
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ast_mutex_unlock(&chan->lock);
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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 = 1, 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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if (chan && !ast_check_hangup(chan) && spyee && !ast_check_hangup(spyee)) {
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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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csth.spy.status = CHANSPY_RUNNING;
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ast_mutex_init(&csth.spy.lock);
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csth.volfactor = *volfactor;
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if (fd) {
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csth.fd = fd;
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}
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start_spying(spyee, chan, &csth.spy);
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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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csth.volfactor++;
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if (csth.volfactor > 4) {
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csth.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, csth.volfactor);
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}
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*volfactor = 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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ast_flush_spy_queue(&csth.spy);
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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],
|
|
peer_name[AST_NAME_STRLEN],
|
|
*args,
|
|
*ptr = NULL,
|
|
*options = NULL,
|
|
*spec = NULL,
|
|
*argv[5],
|
|
*mygroup = NULL,
|
|
*recbase = NULL;
|
|
int res = -1,
|
|
volfactor = 0,
|
|
silent = 0,
|
|
argc = 0,
|
|
bronly = 0,
|
|
chosen = 0,
|
|
count=0,
|
|
waitms = 100,
|
|
num = 0,
|
|
oldrf = 0,
|
|
oldwf = 0,
|
|
fd = 0;
|
|
struct ast_flags flags;
|
|
|
|
|
|
if (!(args = ast_strdupa((char *)data))) {
|
|
ast_log(LOG_ERROR, "Out of memory!\n");
|
|
return -1;
|
|
}
|
|
|
|
oldrf = chan->readformat;
|
|
oldwf = chan->writeformat;
|
|
if (ast_set_read_format(chan, AST_FORMAT_SLINEAR) < 0) {
|
|
ast_log(LOG_ERROR, "Could Not Set Read Format.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ast_set_write_format(chan, AST_FORMAT_SLINEAR) < 0) {
|
|
ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
|
|
return -1;
|
|
}
|
|
|
|
LOCAL_USER_ADD(u);
|
|
ast_answer(chan);
|
|
|
|
ast_set_flag(chan, AST_FLAG_SPYING); /* so nobody can spy on us while we are spying */
|
|
|
|
|
|
if ((argc = ast_separate_app_args(args, '|', argv, sizeof(argv) / sizeof(argv[0])))) {
|
|
spec = argv[0];
|
|
if ( argc > 1) {
|
|
options = argv[1];
|
|
}
|
|
if (ast_strlen_zero(spec) || !strcmp(spec, "all")) {
|
|
spec = NULL;
|
|
}
|
|
}
|
|
|
|
if (options) {
|
|
char *opts[3];
|
|
ast_parseoptions(chanspy_opts, &flags, opts, options);
|
|
if (ast_test_flag(&flags, OPTION_GROUP)) {
|
|
mygroup = opts[1];
|
|
}
|
|
if (ast_test_flag(&flags, OPTION_RECORD)) {
|
|
if (!(recbase = opts[2])) {
|
|
recbase = "chanspy";
|
|
}
|
|
}
|
|
silent = ast_test_flag(&flags, OPTION_QUIET);
|
|
bronly = ast_test_flag(&flags, OPTION_BRIDGED);
|
|
if (ast_test_flag(&flags, OPTION_VOLUME) && opts[1]) {
|
|
if (sscanf(opts[0], "%d", &volfactor) != 1)
|
|
ast_log(LOG_NOTICE, "volfactor must be a number between -4 and 4\n");
|
|
else {
|
|
volfactor = minmax(volfactor, 4);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (recbase) {
|
|
char filename[512];
|
|
snprintf(filename,sizeof(filename),"%s/%s.%ld.raw",ast_config_AST_MONITOR_DIR, recbase, time(NULL));
|
|
if ((fd = open(filename, O_CREAT | O_WRONLY, O_TRUNC)) <= 0) {
|
|
ast_log(LOG_WARNING, "Cannot open %s for recording\n", filename);
|
|
fd = 0;
|
|
}
|
|
}
|
|
|
|
for(;;) {
|
|
if (!silent) {
|
|
res = ast_streamfile(chan, "beep", chan->language);
|
|
if (!res)
|
|
res = ast_waitstream(chan, "");
|
|
if (res < 0) {
|
|
ast_clear_flag(chan, AST_FLAG_SPYING);
|
|
break;
|
|
}
|
|
}
|
|
|
|
count = 0;
|
|
res = ast_waitfordigit(chan, waitms);
|
|
if (res < 0) {
|
|
ast_clear_flag(chan, AST_FLAG_SPYING);
|
|
break;
|
|
}
|
|
|
|
peer = local_channel_walk(NULL);
|
|
prev=NULL;
|
|
while(peer) {
|
|
if (peer != chan) {
|
|
char *group = NULL;
|
|
int igrp = 1;
|
|
|
|
if (peer == prev && !chosen) {
|
|
break;
|
|
}
|
|
chosen = 0;
|
|
group = pbx_builtin_getvar_helper(peer, "SPYGROUP");
|
|
if (mygroup) {
|
|
if (!group || strcmp(mygroup, group)) {
|
|
igrp = 0;
|
|
}
|
|
}
|
|
|
|
if (igrp && (!spec || ((strlen(spec) < strlen(peer->name) &&
|
|
!strncasecmp(peer->name, spec, strlen(spec)))))) {
|
|
if (peer && (!bronly || ast_bridged_channel(peer)) &&
|
|
!ast_check_hangup(peer) && !ast_test_flag(peer, AST_FLAG_SPYING)) {
|
|
int x = 0;
|
|
|
|
strncpy(peer_name, peer->name, AST_NAME_STRLEN);
|
|
ptr = strchr(peer_name, '/');
|
|
*ptr = '\0';
|
|
ptr++;
|
|
for (x = 0 ; x < strlen(peer_name) ; x++) {
|
|
if (peer_name[x] == '/') {
|
|
break;
|
|
}
|
|
peer_name[x] = tolower(peer_name[x]);
|
|
}
|
|
|
|
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);
|
|
ALL_DONE(u, res);
|
|
}
|
|
|
|
int unload_module(void)
|
|
{
|
|
STANDARD_HANGUP_LOCALUSERS;
|
|
return ast_unregister_application(app);
|
|
}
|
|
|
|
int load_module(void)
|
|
{
|
|
return ast_register_application(app, chanspy_exec, synopsis, desc);
|
|
}
|
|
|
|
char *description(void)
|
|
{
|
|
return synopsis;
|
|
}
|
|
|
|
int usecount(void)
|
|
{
|
|
int res;
|
|
STANDARD_USECOUNT(res);
|
|
return res;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|