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asterisk/main/app.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Convenient Application Routines
*
* \author Mark Spencer <markster@digium.com>
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <regex.h>
#include <sys/file.h> /* added this to allow to compile, sorry! */
#include "asterisk/paths.h" /* use ast_config_AST_DATA_DIR */
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/file.h"
#include "asterisk/app.h"
#include "asterisk/dsp.h"
#include "asterisk/utils.h"
#include "asterisk/lock.h"
#include "asterisk/indications.h"
#include "asterisk/linkedlists.h"
#define MAX_OTHER_FORMATS 10
static AST_RWLIST_HEAD_STATIC(groups, ast_group_info);
/*!
* \brief This function presents a dialtone and reads an extension into 'collect'
* which must be a pointer to a **pre-initialized** array of char having a
* size of 'size' suitable for writing to. It will collect no more than the smaller
* of 'maxlen' or 'size' minus the original strlen() of collect digits.
* \param chan struct.
* \param context
* \param collect
* \param size
* \param maxlen
* \param timeout timeout in seconds
*
* \return 0 if extension does not exist, 1 if extension exists
*/
int ast_app_dtget(struct ast_channel *chan, const char *context, char *collect, size_t size, int maxlen, int timeout)
{
struct ind_tone_zone_sound *ts;
int res = 0, x = 0;
if (maxlen > size)
maxlen = size;
if (!timeout && chan->pbx)
timeout = chan->pbx->dtimeout;
else if (!timeout)
timeout = 5;
if ((ts = ast_get_indication_tone(chan->zone, "dial")) && ts->data[0])
res = ast_playtones_start(chan, 0, ts->data, 0);
else
ast_log(LOG_NOTICE, "Huh....? no dial for indications?\n");
for (x = strlen(collect); x < maxlen; ) {
res = ast_waitfordigit(chan, timeout);
if (!ast_ignore_pattern(context, collect))
ast_playtones_stop(chan);
if (res < 1)
break;
if (res == '#')
break;
collect[x++] = res;
if (!ast_matchmore_extension(chan, context, collect, 1, chan->cid.cid_num))
break;
}
if (res >= 0)
res = ast_exists_extension(chan, context, collect, 1, chan->cid.cid_num) ? 1 : 0;
return res;
}
/*!
* \brief ast_app_getdata
* \param c The channel to read from
* \param prompt The file to stream to the channel
* \param s The string to read in to. Must be at least the size of your length
* \param maxlen How many digits to read (maximum)
* \param timeout set timeout to 0 for "standard" timeouts. Set timeout to -1 for
* "ludicrous time" (essentially never times out) */
int ast_app_getdata(struct ast_channel *c, const char *prompt, char *s, int maxlen, int timeout)
{
int res = 0, to, fto;
char *front, *filename;
/* XXX Merge with full version? XXX */
if (maxlen)
s[0] = '\0';
if (!prompt)
prompt = "";
filename = ast_strdupa(prompt);
while ((front = strsep(&filename, "&"))) {
if (!ast_strlen_zero(front)) {
res = ast_streamfile(c, front, c->language);
if (res)
continue;
}
if (ast_strlen_zero(filename)) {
/* set timeouts for the last prompt */
fto = c->pbx ? c->pbx->rtimeout * 1000 : 6000;
to = c->pbx ? c->pbx->dtimeout * 1000 : 2000;
if (timeout > 0)
fto = to = timeout;
if (timeout < 0)
fto = to = 1000000000;
} else {
/* there is more than one prompt, so
get rid of the long timeout between
prompts, and make it 50ms */
fto = 50;
to = c->pbx ? c->pbx->dtimeout * 1000 : 2000;
}
res = ast_readstring(c, s, maxlen, to, fto, "#");
if (!ast_strlen_zero(s))
return res;
}
return res;
}
/* The lock type used by ast_lock_path() / ast_unlock_path() */
static enum AST_LOCK_TYPE ast_lock_type = AST_LOCK_TYPE_LOCKFILE;
int ast_app_getdata_full(struct ast_channel *c, char *prompt, char *s, int maxlen, int timeout, int audiofd, int ctrlfd)
{
int res, to = 2000, fto = 6000;
if (!ast_strlen_zero(prompt)) {
res = ast_streamfile(c, prompt, c->language);
if (res < 0)
return res;
}
if (timeout > 0)
fto = to = timeout;
if (timeout < 0)
fto = to = 1000000000;
res = ast_readstring_full(c, s, maxlen, to, fto, "#", audiofd, ctrlfd);
return res;
}
static int (*ast_has_voicemail_func)(const char *mailbox, const char *folder) = NULL;
static int (*ast_inboxcount_func)(const char *mailbox, int *newmsgs, int *oldmsgs) = NULL;
static int (*ast_messagecount_func)(const char *context, const char *mailbox, const char *folder) = NULL;
void ast_install_vm_functions(int (*has_voicemail_func)(const char *mailbox, const char *folder),
int (*inboxcount_func)(const char *mailbox, int *newmsgs, int *oldmsgs),
int (*messagecount_func)(const char *context, const char *mailbox, const char *folder))
{
ast_has_voicemail_func = has_voicemail_func;
ast_inboxcount_func = inboxcount_func;
ast_messagecount_func = messagecount_func;
}
void ast_uninstall_vm_functions(void)
{
ast_has_voicemail_func = NULL;
ast_inboxcount_func = NULL;
ast_messagecount_func = NULL;
}
int ast_app_has_voicemail(const char *mailbox, const char *folder)
{
static int warned = 0;
if (ast_has_voicemail_func)
return ast_has_voicemail_func(mailbox, folder);
if (!warned) {
ast_verb(3, "Message check requested for mailbox %s/folder %s but voicemail not loaded.\n", mailbox, folder ? folder : "INBOX");
warned++;
}
return 0;
}
int ast_app_inboxcount(const char *mailbox, int *newmsgs, int *oldmsgs)
{
static int warned = 0;
if (newmsgs)
*newmsgs = 0;
if (oldmsgs)
*oldmsgs = 0;
if (ast_inboxcount_func)
return ast_inboxcount_func(mailbox, newmsgs, oldmsgs);
if (!warned) {
warned++;
ast_verb(3, "Message count requested for mailbox %s but voicemail not loaded.\n", mailbox);
}
return 0;
}
int ast_app_messagecount(const char *context, const char *mailbox, const char *folder)
{
static int warned = 0;
if (ast_messagecount_func)
return ast_messagecount_func(context, mailbox, folder);
if (!warned) {
warned++;
ast_verb(3, "Message count requested for mailbox %s@%s/%s but voicemail not loaded.\n", mailbox, context, folder);
}
return 0;
}
int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration)
{
const char *ptr;
int res = 0;
if (!between)
between = 100;
if (peer)
res = ast_autoservice_start(peer);
if (!res)
res = ast_waitfor(chan, 100);
/* ast_waitfor will return the number of remaining ms on success */
if (res < 0)
return res;
for (ptr = digits; *ptr; ptr++) {
if (*ptr == 'w') {
/* 'w' -- wait half a second */
if ((res = ast_safe_sleep(chan, 500)))
break;
} else if (strchr("0123456789*#abcdfABCDF", *ptr)) {
/* Character represents valid DTMF */
if (*ptr == 'f' || *ptr == 'F') {
/* ignore return values if not supported by channel */
ast_indicate(chan, AST_CONTROL_FLASH);
} else
ast_senddigit(chan, *ptr, duration);
/* pause between digits */
if ((res = ast_safe_sleep(chan, between)))
break;
} else
ast_log(LOG_WARNING, "Illegal DTMF character '%c' in string. (0-9*#aAbBcCdD allowed)\n", *ptr);
}
if (peer) {
/* Stop autoservice on the peer channel, but don't overwrite any error condition
that has occurred previously while acting on the primary channel */
if (ast_autoservice_stop(peer) && !res)
res = -1;
}
return res;
}
struct linear_state {
int fd;
int autoclose;
int allowoverride;
int origwfmt;
};
static void linear_release(struct ast_channel *chan, void *params)
{
struct linear_state *ls = params;
if (ls->origwfmt && ast_set_write_format(chan, ls->origwfmt))
ast_log(LOG_WARNING, "Unable to restore channel '%s' to format '%d'\n", chan->name, ls->origwfmt);
if (ls->autoclose)
close(ls->fd);
ast_free(params);
}
static int linear_generator(struct ast_channel *chan, void *data, int len, int samples)
{
short buf[2048 + AST_FRIENDLY_OFFSET / 2];
struct linear_state *ls = data;
struct ast_frame f = {
.frametype = AST_FRAME_VOICE,
.subclass = AST_FORMAT_SLINEAR,
.data = buf + AST_FRIENDLY_OFFSET / 2,
.offset = AST_FRIENDLY_OFFSET,
};
int res;
len = samples * 2;
if (len > sizeof(buf) - AST_FRIENDLY_OFFSET) {
ast_log(LOG_WARNING, "Can't generate %d bytes of data!\n" , len);
len = sizeof(buf) - AST_FRIENDLY_OFFSET;
}
res = read(ls->fd, buf + AST_FRIENDLY_OFFSET/2, len);
if (res > 0) {
f.datalen = res;
f.samples = res / 2;
ast_write(chan, &f);
if (res == len)
return 0;
}
return -1;
}
static void *linear_alloc(struct ast_channel *chan, void *params)
{
struct linear_state *ls = params;
if (!params)
return NULL;
/* In this case, params is already malloc'd */
if (ls->allowoverride)
ast_set_flag(chan, AST_FLAG_WRITE_INT);
else
ast_clear_flag(chan, AST_FLAG_WRITE_INT);
ls->origwfmt = chan->writeformat;
if (ast_set_write_format(chan, AST_FORMAT_SLINEAR)) {
ast_log(LOG_WARNING, "Unable to set '%s' to linear format (write)\n", chan->name);
ast_free(ls);
ls = params = NULL;
}
return params;
}
static struct ast_generator linearstream =
{
alloc: linear_alloc,
release: linear_release,
generate: linear_generator,
};
int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride)
{
struct linear_state *lin;
char tmpf[256];
int res = -1;
int autoclose = 0;
if (fd < 0) {
if (ast_strlen_zero(filename))
return -1;
autoclose = 1;
if (filename[0] == '/')
ast_copy_string(tmpf, filename, sizeof(tmpf));
else
snprintf(tmpf, sizeof(tmpf), "%s/%s/%s", ast_config_AST_DATA_DIR, "sounds", filename);
if ((fd = open(tmpf, O_RDONLY)) < 0) {
ast_log(LOG_WARNING, "Unable to open file '%s': %s\n", tmpf, strerror(errno));
return -1;
}
}
if ((lin = ast_calloc(1, sizeof(*lin)))) {
lin->fd = fd;
lin->allowoverride = allowoverride;
lin->autoclose = autoclose;
res = ast_activate_generator(chan, &linearstream, lin);
}
return res;
}
int ast_control_streamfile(struct ast_channel *chan, const char *file,
const char *fwd, const char *rev,
const char *stop, const char *pause,
const char *restart, int skipms, long *offsetms)
{
char *breaks = NULL;
char *end = NULL;
int blen = 2;
int res;
long pause_restart_point = 0;
long offset = 0;
if (offsetms)
offset = *offsetms * 8; /* XXX Assumes 8kHz */
if (stop)
blen += strlen(stop);
if (pause)
blen += strlen(pause);
if (restart)
blen += strlen(restart);
if (blen > 2) {
breaks = alloca(blen + 1);
breaks[0] = '\0';
if (stop)
strcat(breaks, stop);
if (pause)
strcat(breaks, pause);
if (restart)
strcat(breaks, restart);
}
if (chan->_state != AST_STATE_UP)
res = ast_answer(chan);
if (file) {
if ((end = strchr(file, ':'))) {
if (!strcasecmp(end, ":end")) {
*end = '\0';
end++;
}
}
}
for (;;) {
ast_stopstream(chan);
res = ast_streamfile(chan, file, chan->language);
if (!res) {
if (pause_restart_point) {
ast_seekstream(chan->stream, pause_restart_point, SEEK_SET);
pause_restart_point = 0;
}
else if (end || offset < 0) {
if (offset == -8)
offset = 0;
ast_verb(3, "ControlPlayback seek to offset %ld from end\n", offset);
ast_seekstream(chan->stream, offset, SEEK_END);
end = NULL;
offset = 0;
} else if (offset) {
ast_verb(3, "ControlPlayback seek to offset %ld\n", offset);
ast_seekstream(chan->stream, offset, SEEK_SET);
offset = 0;
};
res = ast_waitstream_fr(chan, breaks, fwd, rev, skipms);
}
if (res < 1)
break;
/* We go at next loop if we got the restart char */
if (restart && strchr(restart, res)) {
ast_debug(1, "we'll restart the stream here at next loop\n");
pause_restart_point = 0;
continue;
}
if (pause && strchr(pause, res)) {
pause_restart_point = ast_tellstream(chan->stream);
for (;;) {
ast_stopstream(chan);
res = ast_waitfordigit(chan, 1000);
if (!res)
continue;
else if (res == -1 || strchr(pause, res) || (stop && strchr(stop, res)))
break;
}
if (res == *pause) {
res = 0;
continue;
}
}
if (res == -1)
break;
/* if we get one of our stop chars, return it to the calling function */
if (stop && strchr(stop, res))
break;
}
if (pause_restart_point) {
offset = pause_restart_point;
} else {
if (chan->stream) {
offset = ast_tellstream(chan->stream);
} else {
offset = -8; /* indicate end of file */
}
}
if (offsetms)
*offsetms = offset / 8; /* samples --> ms ... XXX Assumes 8 kHz */
/* If we are returning a digit cast it as char */
if (res > 0 || chan->stream)
res = (char)res;
ast_stopstream(chan);
return res;
}
int ast_play_and_wait(struct ast_channel *chan, const char *fn)
{
int d = 0;
if ((d = ast_streamfile(chan, fn, chan->language)))
return d;
d = ast_waitstream(chan, AST_DIGIT_ANY);
ast_stopstream(chan);
return d;
}
static int global_silence_threshold = 128;
static int global_maxsilence = 0;
/*! Optionally play a sound file or a beep, then record audio and video from the channel.
* \param chan Channel to playback to/record from.
* \param playfile Filename of sound to play before recording begins.
* \param recordfile Filename to record to.
* \param maxtime Maximum length of recording (in milliseconds).
* \param fmt Format(s) to record message in. Multiple formats may be specified by separating them with a '|'.
* \param duration Where to store actual length of the recorded message (in milliseconds).
* \param beep Whether to play a beep before starting to record.
* \param silencethreshold
* \param maxsilence Length of silence that will end a recording (in milliseconds).
* \param path Optional filesystem path to unlock.
* \param prepend If true, prepend the recorded audio to an existing file.
* \param acceptdtmf DTMF digits that will end the recording.
* \param canceldtmf DTMF digits that will cancel the recording.
*/
static int __ast_play_and_record(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, int beep, int silencethreshold, int maxsilence, const char *path, int prepend, const char *acceptdtmf, const char *canceldtmf)
{
int d = 0;
char *fmts;
char comment[256];
int x, fmtcnt = 1, res = -1, outmsg = 0;
struct ast_filestream *others[MAX_OTHER_FORMATS];
char *sfmt[MAX_OTHER_FORMATS];
char *stringp = NULL;
time_t start, end;
struct ast_dsp *sildet = NULL; /* silence detector dsp */
int totalsilence = 0;
int rfmt = 0;
struct ast_silence_generator *silgen = NULL;
char prependfile[80];
if (silencethreshold < 0)
silencethreshold = global_silence_threshold;
if (maxsilence < 0)
maxsilence = global_maxsilence;
/* barf if no pointer passed to store duration in */
if (!duration) {
ast_log(LOG_WARNING, "Error play_and_record called without duration pointer\n");
return -1;
}
ast_debug(1, "play_and_record: %s, %s, '%s'\n", playfile ? playfile : "<None>", recordfile, fmt);
snprintf(comment, sizeof(comment), "Playing %s, Recording to: %s on %s\n", playfile ? playfile : "<None>", recordfile, chan->name);
if (playfile || beep) {
if (!beep)
d = ast_play_and_wait(chan, playfile);
if (d > -1)
d = ast_stream_and_wait(chan, "beep", "");
if (d < 0)
return -1;
}
if (prepend) {
ast_copy_string(prependfile, recordfile, sizeof(prependfile));
strncat(prependfile, "-prepend", sizeof(prependfile) - strlen(prependfile) - 1);
}
fmts = ast_strdupa(fmt);
stringp = fmts;
strsep(&stringp, "|");
ast_debug(1, "Recording Formats: sfmts=%s\n", fmts);
sfmt[0] = ast_strdupa(fmts);
while ((fmt = strsep(&stringp, "|"))) {
if (fmtcnt > MAX_OTHER_FORMATS - 1) {
ast_log(LOG_WARNING, "Please increase MAX_OTHER_FORMATS in app.c\n");
break;
}
sfmt[fmtcnt++] = ast_strdupa(fmt);
}
end = start = time(NULL); /* pre-initialize end to be same as start in case we never get into loop */
for (x = 0; x < fmtcnt; x++) {
others[x] = ast_writefile(prepend ? prependfile : recordfile, sfmt[x], comment, O_TRUNC, 0, AST_FILE_MODE);
ast_verb(3, "x=%d, open writing: %s format: %s, %p\n", x, prepend ? prependfile : recordfile, sfmt[x], others[x]);
if (!others[x])
break;
}
if (path)
ast_unlock_path(path);
if (maxsilence > 0) {
sildet = ast_dsp_new(); /* Create the silence detector */
if (!sildet) {
ast_log(LOG_WARNING, "Unable to create silence detector :(\n");
return -1;
}
ast_dsp_set_threshold(sildet, silencethreshold);
rfmt = chan->readformat;
res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
if (res < 0) {
ast_log(LOG_WARNING, "Unable to set to linear mode, giving up\n");
ast_dsp_free(sildet);
return -1;
}
}
if (!prepend) {
/* Request a video update */
ast_indicate(chan, AST_CONTROL_VIDUPDATE);
if (ast_opt_transmit_silence)
silgen = ast_channel_start_silence_generator(chan);
}
if (x == fmtcnt) {
/* Loop forever, writing the packets we read to the writer(s), until
we read a digit or get a hangup */
struct ast_frame *f;
for (;;) {
res = ast_waitfor(chan, 2000);
if (!res) {
ast_debug(1, "One waitfor failed, trying another\n");
/* Try one more time in case of masq */
res = ast_waitfor(chan, 2000);
if (!res) {
ast_log(LOG_WARNING, "No audio available on %s??\n", chan->name);
res = -1;
}
}
if (res < 0) {
f = NULL;
break;
}
f = ast_read(chan);
if (!f)
break;
if (f->frametype == AST_FRAME_VOICE) {
/* write each format */
for (x = 0; x < fmtcnt; x++) {
if (prepend && !others[x])
break;
res = ast_writestream(others[x], f);
}
/* Silence Detection */
if (maxsilence > 0) {
int dspsilence = 0;
ast_dsp_silence(sildet, f, &dspsilence);
if (dspsilence)
totalsilence = dspsilence;
else
totalsilence = 0;
if (totalsilence > maxsilence) {
/* Ended happily with silence */
ast_verb(3, "Recording automatically stopped after a silence of %d seconds\n", totalsilence/1000);
res = 'S';
outmsg = 2;
break;
}
}
/* Exit on any error */
if (res) {
ast_log(LOG_WARNING, "Error writing frame\n");
break;
}
} else if (f->frametype == AST_FRAME_VIDEO) {
/* Write only once */
ast_writestream(others[0], f);
} else if (f->frametype == AST_FRAME_DTMF) {
if (prepend) {
/* stop recording with any digit */
ast_verb(3, "User ended message by pressing %c\n", f->subclass);
res = 't';
outmsg = 2;
break;
}
if (strchr(acceptdtmf, f->subclass)) {
ast_verb(3, "User ended message by pressing %c\n", f->subclass);
res = f->subclass;
outmsg = 2;
break;
}
if (strchr(canceldtmf, f->subclass)) {
ast_verb(3, "User cancelled message by pressing %c\n", f->subclass);
res = f->subclass;
outmsg = 0;
break;
}
}
if (maxtime) {
end = time(NULL);
if (maxtime < (end - start)) {
ast_verb(3, "Took too long, cutting it short...\n");
res = 't';
outmsg = 2;
break;
}
}
ast_frfree(f);
}
if (!f) {
ast_verb(3, "User hung up\n");
res = -1;
outmsg = 1;
} else {
ast_frfree(f);
}
} else {
ast_log(LOG_WARNING, "Error creating writestream '%s', format '%s'\n", recordfile, sfmt[x]);
}
if (!prepend) {
if (silgen)
ast_channel_stop_silence_generator(chan, silgen);
}
/*!\note
* Instead of asking how much time passed (end - start), calculate the number
* of seconds of audio which actually went into the file. This fixes a
* problem where audio is stopped up on the network and never gets to us.
*
* Note that we still want to use the number of seconds passed for the max
* message, otherwise we could get a situation where this stream is never
* closed (which would create a resource leak).
*/
*duration = others[0] ? ast_tellstream(others[0]) / 8000 : 0;
if (!prepend) {
for (x = 0; x < fmtcnt; x++) {
if (!others[x])
break;
/*!\note
* If we ended with silence, trim all but the first 200ms of silence
* off the recording. However, if we ended with '#', we don't want
* to trim ANY part of the recording.
*/
if (res > 0 && totalsilence)
ast_stream_rewind(others[x], totalsilence - 200);
ast_truncstream(others[x]);
ast_closestream(others[x]);
}
}
if (prepend && outmsg) {
struct ast_filestream *realfiles[MAX_OTHER_FORMATS];
struct ast_frame *fr;
for (x = 0; x < fmtcnt; x++) {
snprintf(comment, sizeof(comment), "Opening the real file %s.%s\n", recordfile, sfmt[x]);
realfiles[x] = ast_readfile(recordfile, sfmt[x], comment, O_RDONLY, 0, 0);
if (!others[x] || !realfiles[x])
break;
/*!\note Same logic as above. */
if (totalsilence)
ast_stream_rewind(others[x], totalsilence - 200);
ast_truncstream(others[x]);
/* add the original file too */
while ((fr = ast_readframe(realfiles[x]))) {
ast_writestream(others[x], fr);
ast_frfree(fr);
}
ast_closestream(others[x]);
ast_closestream(realfiles[x]);
ast_filerename(prependfile, recordfile, sfmt[x]);
ast_verb(4, "Recording Format: sfmts=%s, prependfile %s, recordfile %s\n", sfmt[x], prependfile, recordfile);
ast_filedelete(prependfile, sfmt[x]);
}
}
if (rfmt && ast_set_read_format(chan, rfmt)) {
ast_log(LOG_WARNING, "Unable to restore format %s to channel '%s'\n", ast_getformatname(rfmt), chan->name);
}
if (outmsg == 2) {
ast_stream_and_wait(chan, "auth-thankyou", "");
}
if (sildet)
ast_dsp_free(sildet);
return res;
}
static char default_acceptdtmf[] = "#";
static char default_canceldtmf[] = "";
int ast_play_and_record_full(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, int silencethreshold, int maxsilence, const char *path, const char *acceptdtmf, const char *canceldtmf)
{
return __ast_play_and_record(chan, playfile, recordfile, maxtime, fmt, duration, 0, silencethreshold, maxsilence, path, 0, S_OR(acceptdtmf, default_acceptdtmf), S_OR(canceldtmf, default_canceldtmf));
}
int ast_play_and_record(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, int silencethreshold, int maxsilence, const char *path)
{
return __ast_play_and_record(chan, playfile, recordfile, maxtime, fmt, duration, 0, silencethreshold, maxsilence, path, 0, default_acceptdtmf, default_canceldtmf);
}
int ast_play_and_prepend(struct ast_channel *chan, char *playfile, char *recordfile, int maxtime, char *fmt, int *duration, int beep, int silencethreshold, int maxsilence)
{
return __ast_play_and_record(chan, playfile, recordfile, maxtime, fmt, duration, beep, silencethreshold, maxsilence, NULL, 1, default_acceptdtmf, default_canceldtmf);
}
/* Channel group core functions */
int ast_app_group_split_group(const char *data, char *group, int group_max, char *category, int category_max)
{
int res = 0;
char tmp[256];
char *grp = NULL, *cat = NULL;
if (!ast_strlen_zero(data)) {
ast_copy_string(tmp, data, sizeof(tmp));
grp = tmp;
cat = strchr(tmp, '@');
if (cat) {
*cat = '\0';
cat++;
}
}
if (!ast_strlen_zero(grp))
ast_copy_string(group, grp, group_max);
else
*group = '\0';
if (!ast_strlen_zero(cat))
ast_copy_string(category, cat, category_max);
return res;
}
int ast_app_group_set_channel(struct ast_channel *chan, const char *data)
{
int res = 0;
char group[80] = "", category[80] = "";
struct ast_group_info *gi = NULL;
size_t len = 0;
if (ast_app_group_split_group(data, group, sizeof(group), category, sizeof(category)))
return -1;
/* Calculate memory we will need if this is new */
len = sizeof(*gi) + strlen(group) + 1;
if (!ast_strlen_zero(category))
len += strlen(category) + 1;
AST_RWLIST_WRLOCK(&groups);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&groups, gi, list) {
if ((gi->chan == chan) && ((ast_strlen_zero(category) && ast_strlen_zero(gi->category)) || (!ast_strlen_zero(gi->category) && !strcasecmp(gi->category, category)))) {
AST_RWLIST_REMOVE_CURRENT(list);
free(gi);
break;
}
}
AST_RWLIST_TRAVERSE_SAFE_END;
if (ast_strlen_zero(group)) {
/* Enable unsetting the group */
} else if ((gi = calloc(1, len))) {
gi->chan = chan;
gi->group = (char *) gi + sizeof(*gi);
strcpy(gi->group, group);
if (!ast_strlen_zero(category)) {
gi->category = (char *) gi + sizeof(*gi) + strlen(group) + 1;
strcpy(gi->category, category);
}
AST_RWLIST_INSERT_TAIL(&groups, gi, list);
} else {
res = -1;
}
AST_RWLIST_UNLOCK(&groups);
return res;
}
int ast_app_group_get_count(const char *group, const char *category)
{
struct ast_group_info *gi = NULL;
int count = 0;
if (ast_strlen_zero(group))
return 0;
AST_RWLIST_RDLOCK(&groups);
AST_RWLIST_TRAVERSE(&groups, gi, list) {
if (!strcasecmp(gi->group, group) && (ast_strlen_zero(category) || (!ast_strlen_zero(gi->category) && !strcasecmp(gi->category, category))))
count++;
}
AST_RWLIST_UNLOCK(&groups);
return count;
}
int ast_app_group_match_get_count(const char *groupmatch, const char *category)
{
struct ast_group_info *gi = NULL;
regex_t regexbuf;
int count = 0;
if (ast_strlen_zero(groupmatch))
return 0;
/* if regex compilation fails, return zero matches */
if (regcomp(&regexbuf, groupmatch, REG_EXTENDED | REG_NOSUB))
return 0;
AST_RWLIST_RDLOCK(&groups);
AST_RWLIST_TRAVERSE(&groups, gi, list) {
if (!regexec(&regexbuf, gi->group, 0, NULL, 0) && (ast_strlen_zero(category) || (!ast_strlen_zero(gi->category) && !strcasecmp(gi->category, category))))
count++;
}
AST_RWLIST_UNLOCK(&groups);
regfree(&regexbuf);
return count;
}
int ast_app_group_update(struct ast_channel *old, struct ast_channel *new)
{
struct ast_group_info *gi = NULL;
AST_RWLIST_WRLOCK(&groups);
AST_RWLIST_TRAVERSE(&groups, gi, list) {
if (gi->chan == old)
gi->chan = new;
}
AST_RWLIST_UNLOCK(&groups);
return 0;
}
int ast_app_group_discard(struct ast_channel *chan)
{
struct ast_group_info *gi = NULL;
AST_RWLIST_WRLOCK(&groups);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&groups, gi, list) {
if (gi->chan == chan) {
AST_RWLIST_REMOVE_CURRENT(list);
ast_free(gi);
}
}
AST_RWLIST_TRAVERSE_SAFE_END;
AST_RWLIST_UNLOCK(&groups);
return 0;
}
int ast_app_group_list_wrlock(void)
{
return AST_RWLIST_WRLOCK(&groups);
}
int ast_app_group_list_rdlock(void)
{
return AST_RWLIST_RDLOCK(&groups);
}
struct ast_group_info *ast_app_group_list_head(void)
{
return AST_RWLIST_FIRST(&groups);
}
int ast_app_group_list_unlock(void)
{
return AST_RWLIST_UNLOCK(&groups);
}
unsigned int ast_app_separate_args(char *buf, char delim, char **array, int arraylen)
{
int argc;
char *scan;
int paren = 0, quote = 0;
if (!buf || !array || !arraylen)
return 0;
memset(array, 0, arraylen * sizeof(*array));
scan = buf;
for (argc = 0; *scan && (argc < arraylen - 1); argc++) {
array[argc] = scan;
for (; *scan; scan++) {
if (*scan == '(')
paren++;
else if (*scan == ')') {
if (paren)
paren--;
} else if (*scan == '"' && delim != '"') {
quote = quote ? 0 : 1;
/* Remove quote character from argument */
memmove(scan, scan + 1, strlen(scan));
scan--;
} else if (*scan == '\\') {
/* Literal character, don't parse */
memmove(scan, scan + 1, strlen(scan));
} else if ((*scan == delim) && !paren && !quote) {
*scan++ = '\0';
break;
}
}
}
if (*scan)
array[argc++] = scan;
return argc;
}
static enum AST_LOCK_RESULT ast_lock_path_lockfile(const char *path)
{
char *s;
char *fs;
int res;
int fd;
int lp = strlen(path);
time_t start;
s = alloca(lp + 10);
fs = alloca(lp + 20);
snprintf(fs, strlen(path) + 19, "%s/.lock-%08lx", path, ast_random());
fd = open(fs, O_WRONLY | O_CREAT | O_EXCL, AST_FILE_MODE);
if (fd < 0) {
ast_log(LOG_ERROR, "Unable to create lock file '%s': %s\n", path, strerror(errno));
return AST_LOCK_PATH_NOT_FOUND;
}
close(fd);
snprintf(s, strlen(path) + 9, "%s/.lock", path);
start = time(NULL);
while (((res = link(fs, s)) < 0) && (errno == EEXIST) && (time(NULL) - start < 5))
usleep(1);
unlink(fs);
if (res) {
ast_log(LOG_WARNING, "Failed to lock path '%s': %s\n", path, strerror(errno));
return AST_LOCK_TIMEOUT;
} else {
ast_debug(1, "Locked path '%s'\n", path);
return AST_LOCK_SUCCESS;
}
}
static int ast_unlock_path_lockfile(const char *path)
{
char *s;
int res;
s = alloca(strlen(path) + 10);
snprintf(s, strlen(path) + 9, "%s/%s", path, ".lock");
if ((res = unlink(s)))
ast_log(LOG_ERROR, "Could not unlock path '%s': %s\n", path, strerror(errno));
else {
ast_debug(1, "Unlocked path '%s'\n", path);
}
return res;
}
struct path_lock {
AST_LIST_ENTRY(path_lock) le;
int fd;
char *path;
};
static AST_LIST_HEAD_STATIC(path_lock_list, path_lock);
static void path_lock_destroy(struct path_lock *obj)
{
if (obj->fd >= 0)
close(obj->fd);
if (obj->path)
free(obj->path);
free(obj);
}
static enum AST_LOCK_RESULT ast_lock_path_flock(const char *path)
{
char *fs;
int res;
int fd;
time_t start;
struct path_lock *pl;
struct stat st, ost;
fs = alloca(strlen(path) + 20);
snprintf(fs, strlen(path) + 19, "%s/lock", path);
if (lstat(fs, &st) == 0) {
if ((st.st_mode & S_IFMT) == S_IFLNK) {
ast_log(LOG_WARNING, "Unable to create lock file "
"'%s': it's already a symbolic link\n",
fs);
return AST_LOCK_FAILURE;
}
if (st.st_nlink > 1) {
ast_log(LOG_WARNING, "Unable to create lock file "
"'%s': %u hard links exist\n",
fs, (unsigned int) st.st_nlink);
return AST_LOCK_FAILURE;
}
}
fd = open(fs, O_WRONLY | O_CREAT, 0600);
if (fd < 0) {
ast_log(LOG_WARNING, "Unable to create lock file '%s': %s\n",
fs, strerror(errno));
return AST_LOCK_PATH_NOT_FOUND;
}
pl = ast_calloc(1, sizeof(*pl));
if (!pl) {
/* We don't unlink the lock file here, on the possibility that
* someone else created it - better to leave a little mess
* than create a big one by destroying someone else's lock
* and causing something to be corrupted.
*/
close(fd);
return AST_LOCK_FAILURE;
}
pl->fd = fd;
pl->path = strdup(path);
time(&start);
while ((
#ifdef SOLARIS
(res = fcntl(pl->fd, F_SETLK, fcntl(pl->fd, F_GETFL) | O_NONBLOCK)) < 0) &&
#else
(res = flock(pl->fd, LOCK_EX | LOCK_NB)) < 0) &&
#endif
(errno == EWOULDBLOCK) &&
(time(NULL) - start < 5))
usleep(1000);
if (res) {
ast_log(LOG_WARNING, "Failed to lock path '%s': %s\n",
path, strerror(errno));
/* No unlinking of lock done, since we tried and failed to
* flock() it.
*/
path_lock_destroy(pl);
return AST_LOCK_TIMEOUT;
}
/* Check for the race where the file is recreated or deleted out from
* underneath us.
*/
if (lstat(fs, &st) != 0 && fstat(pl->fd, &ost) != 0 &&
st.st_dev != ost.st_dev &&
st.st_ino != ost.st_ino) {
ast_log(LOG_WARNING, "Unable to create lock file '%s': "
"file changed underneath us\n", fs);
path_lock_destroy(pl);
return AST_LOCK_FAILURE;
}
/* Success: file created, flocked, and is the one we started with */
AST_LIST_LOCK(&path_lock_list);
AST_LIST_INSERT_TAIL(&path_lock_list, pl, le);
AST_LIST_UNLOCK(&path_lock_list);
ast_debug(1, "Locked path '%s'\n", path);
return AST_LOCK_SUCCESS;
}
static int ast_unlock_path_flock(const char *path)
{
char *s;
struct path_lock *p;
s = alloca(strlen(path) + 20);
AST_LIST_LOCK(&path_lock_list);
AST_LIST_TRAVERSE_SAFE_BEGIN(&path_lock_list, p, le) {
if (!strcmp(p->path, path)) {
AST_LIST_REMOVE_CURRENT(le);
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
AST_LIST_UNLOCK(&path_lock_list);
if (p) {
snprintf(s, strlen(path) + 19, "%s/lock", path);
unlink(s);
path_lock_destroy(p);
ast_log(LOG_DEBUG, "Unlocked path '%s'\n", path);
} else
ast_log(LOG_DEBUG, "Failed to unlock path '%s': "
"lock not found\n", path);
return 0;
}
void ast_set_lock_type(enum AST_LOCK_TYPE type)
{
ast_lock_type = type;
}
enum AST_LOCK_RESULT ast_lock_path(const char *path)
{
enum AST_LOCK_RESULT r = AST_LOCK_FAILURE;
switch (ast_lock_type) {
case AST_LOCK_TYPE_LOCKFILE:
r = ast_lock_path_lockfile(path);
break;
case AST_LOCK_TYPE_FLOCK:
r = ast_lock_path_flock(path);
break;
}
return r;
}
int ast_unlock_path(const char *path)
{
int r = 0;
switch (ast_lock_type) {
case AST_LOCK_TYPE_LOCKFILE:
r = ast_unlock_path_lockfile(path);
break;
case AST_LOCK_TYPE_FLOCK:
r = ast_unlock_path_flock(path);
break;
}
return r;
}
int ast_record_review(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, const char *path)
{
int silencethreshold;
int maxsilence = 0;
int res = 0;
int cmd = 0;
int max_attempts = 3;
int attempts = 0;
int recorded = 0;
int message_exists = 0;
/* Note that urgent and private are for flagging messages as such in the future */
/* barf if no pointer passed to store duration in */
if (!duration) {
ast_log(LOG_WARNING, "Error ast_record_review called without duration pointer\n");
return -1;
}
cmd = '3'; /* Want to start by recording */
silencethreshold = ast_dsp_get_threshold_from_settings(THRESHOLD_SILENCE);
while ((cmd >= 0) && (cmd != 't')) {
switch (cmd) {
case '1':
if (!message_exists) {
/* In this case, 1 is to record a message */
cmd = '3';
break;
} else {
ast_stream_and_wait(chan, "vm-msgsaved", "");
cmd = 't';
return res;
}
case '2':
/* Review */
ast_verb(3, "Reviewing the recording\n");
cmd = ast_stream_and_wait(chan, recordfile, AST_DIGIT_ANY);
break;
case '3':
message_exists = 0;
/* Record */
if (recorded == 1)
ast_verb(3, "Re-recording\n");
else
ast_verb(3, "Recording\n");
recorded = 1;
cmd = ast_play_and_record(chan, playfile, recordfile, maxtime, fmt, duration, silencethreshold, maxsilence, path);
if (cmd == -1) {
/* User has hung up, no options to give */
return cmd;
}
if (cmd == '0') {
break;
} else if (cmd == '*') {
break;
}
else {
/* If all is well, a message exists */
message_exists = 1;
cmd = 0;
}
break;
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '*':
case '#':
cmd = ast_play_and_wait(chan, "vm-sorry");
break;
default:
if (message_exists) {
cmd = ast_play_and_wait(chan, "vm-review");
}
else {
cmd = ast_play_and_wait(chan, "vm-torerecord");
if (!cmd)
cmd = ast_waitfordigit(chan, 600);
}
if (!cmd)
cmd = ast_waitfordigit(chan, 6000);
if (!cmd) {
attempts++;
}
if (attempts > max_attempts) {
cmd = 't';
}
}
}
if (cmd == 't')
cmd = 0;
return cmd;
}
#define RES_UPONE (1 << 16)
#define RES_EXIT (1 << 17)
#define RES_REPEAT (1 << 18)
#define RES_RESTART ((1 << 19) | RES_REPEAT)
static int ast_ivr_menu_run_internal(struct ast_channel *chan, struct ast_ivr_menu *menu, void *cbdata);
static int ivr_dispatch(struct ast_channel *chan, struct ast_ivr_option *option, char *exten, void *cbdata)
{
int res;
int (*ivr_func)(struct ast_channel *, void *);
char *c;
char *n;
switch (option->action) {
case AST_ACTION_UPONE:
return RES_UPONE;
case AST_ACTION_EXIT:
return RES_EXIT | (((unsigned long)(option->adata)) & 0xffff);
case AST_ACTION_REPEAT:
return RES_REPEAT | (((unsigned long)(option->adata)) & 0xffff);
case AST_ACTION_RESTART:
return RES_RESTART ;
case AST_ACTION_NOOP:
return 0;
case AST_ACTION_BACKGROUND:
res = ast_stream_and_wait(chan, (char *)option->adata, AST_DIGIT_ANY);
if (res < 0) {
ast_log(LOG_NOTICE, "Unable to find file '%s'!\n", (char *)option->adata);
res = 0;
}
return res;
case AST_ACTION_PLAYBACK:
res = ast_stream_and_wait(chan, (char *)option->adata, "");
if (res < 0) {
ast_log(LOG_NOTICE, "Unable to find file '%s'!\n", (char *)option->adata);
res = 0;
}
return res;
case AST_ACTION_MENU:
res = ast_ivr_menu_run_internal(chan, (struct ast_ivr_menu *)option->adata, cbdata);
/* Do not pass entry errors back up, treat as though it was an "UPONE" */
if (res == -2)
res = 0;
return res;
case AST_ACTION_WAITOPTION:
res = ast_waitfordigit(chan, 1000 * (chan->pbx ? chan->pbx->rtimeout : 10));
if (!res)
return 't';
return res;
case AST_ACTION_CALLBACK:
ivr_func = option->adata;
res = ivr_func(chan, cbdata);
return res;
case AST_ACTION_TRANSFER:
res = ast_parseable_goto(chan, option->adata);
return 0;
case AST_ACTION_PLAYLIST:
case AST_ACTION_BACKLIST:
res = 0;
c = ast_strdupa(option->adata);
while ((n = strsep(&c, ";"))) {
if ((res = ast_stream_and_wait(chan, n,
(option->action == AST_ACTION_BACKLIST) ? AST_DIGIT_ANY : "")))
break;
}
ast_stopstream(chan);
return res;
default:
ast_log(LOG_NOTICE, "Unknown dispatch function %d, ignoring!\n", option->action);
return 0;
};
return -1;
}
static int option_exists(struct ast_ivr_menu *menu, char *option)
{
int x;
for (x = 0; menu->options[x].option; x++)
if (!strcasecmp(menu->options[x].option, option))
return x;
return -1;
}
static int option_matchmore(struct ast_ivr_menu *menu, char *option)
{
int x;
for (x = 0; menu->options[x].option; x++)
if ((!strncasecmp(menu->options[x].option, option, strlen(option))) &&
(menu->options[x].option[strlen(option)]))
return x;
return -1;
}
static int read_newoption(struct ast_channel *chan, struct ast_ivr_menu *menu, char *exten, int maxexten)
{
int res = 0;
int ms;
while (option_matchmore(menu, exten)) {
ms = chan->pbx ? chan->pbx->dtimeout : 5000;
if (strlen(exten) >= maxexten - 1)
break;
res = ast_waitfordigit(chan, ms);
if (res < 1)
break;
exten[strlen(exten) + 1] = '\0';
exten[strlen(exten)] = res;
}
return res > 0 ? 0 : res;
}
static int ast_ivr_menu_run_internal(struct ast_channel *chan, struct ast_ivr_menu *menu, void *cbdata)
{
/* Execute an IVR menu structure */
int res = 0;
int pos = 0;
int retries = 0;
char exten[AST_MAX_EXTENSION] = "s";
if (option_exists(menu, "s") < 0) {
strcpy(exten, "g");
if (option_exists(menu, "g") < 0) {
ast_log(LOG_WARNING, "No 's' nor 'g' extension in menu '%s'!\n", menu->title);
return -1;
}
}
while (!res) {
while (menu->options[pos].option) {
if (!strcasecmp(menu->options[pos].option, exten)) {
res = ivr_dispatch(chan, menu->options + pos, exten, cbdata);
ast_debug(1, "IVR Dispatch of '%s' (pos %d) yields %d\n", exten, pos, res);
if (res < 0)
break;
else if (res & RES_UPONE)
return 0;
else if (res & RES_EXIT)
return res;
else if (res & RES_REPEAT) {
int maxretries = res & 0xffff;
if ((res & RES_RESTART) == RES_RESTART) {
retries = 0;
} else
retries++;
if (!maxretries)
maxretries = 3;
if ((maxretries > 0) && (retries >= maxretries)) {
ast_debug(1, "Max retries %d exceeded\n", maxretries);
return -2;
} else {
if (option_exists(menu, "g") > -1)
strcpy(exten, "g");
else if (option_exists(menu, "s") > -1)
strcpy(exten, "s");
}
pos = 0;
continue;
} else if (res && strchr(AST_DIGIT_ANY, res)) {
ast_debug(1, "Got start of extension, %c\n", res);
exten[1] = '\0';
exten[0] = res;
if ((res = read_newoption(chan, menu, exten, sizeof(exten))))
break;
if (option_exists(menu, exten) < 0) {
if (option_exists(menu, "i")) {
ast_debug(1, "Invalid extension entered, going to 'i'!\n");
strcpy(exten, "i");
pos = 0;
continue;
} else {
ast_debug(1, "Aborting on invalid entry, with no 'i' option!\n");
res = -2;
break;
}
} else {
ast_debug(1, "New existing extension: %s\n", exten);
pos = 0;
continue;
}
}
}
pos++;
}
ast_debug(1, "Stopping option '%s', res is %d\n", exten, res);
pos = 0;
if (!strcasecmp(exten, "s"))
strcpy(exten, "g");
else
break;
}
return res;
}
int ast_ivr_menu_run(struct ast_channel *chan, struct ast_ivr_menu *menu, void *cbdata)
{
int res = ast_ivr_menu_run_internal(chan, menu, cbdata);
/* Hide internal coding */
return res > 0 ? 0 : res;
}
char *ast_read_textfile(const char *filename)
{
int fd, count = 0, res;
char *output = NULL;
struct stat filesize;
if (stat(filename, &filesize) == -1) {
ast_log(LOG_WARNING, "Error can't stat %s\n", filename);
return NULL;
}
count = filesize.st_size + 1;
if ((fd = open(filename, O_RDONLY)) < 0) {
ast_log(LOG_WARNING, "Cannot open file '%s' for reading: %s\n", filename, strerror(errno));
return NULL;
}
if ((output = ast_malloc(count))) {
res = read(fd, output, count - 1);
if (res == count - 1) {
output[res] = '\0';
} else {
ast_log(LOG_WARNING, "Short read of %s (%d of %d): %s\n", filename, res, count - 1, strerror(errno));
ast_free(output);
output = NULL;
}
}
close(fd);
return output;
}
int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr)
{
char *s, *arg;
int curarg, res = 0;
unsigned int argloc;
ast_clear_flag(flags, AST_FLAGS_ALL);
if (!optstr)
return 0;
s = optstr;
while (*s) {
curarg = *s++ & 0x7f; /* the array (in app.h) has 128 entries */
argloc = options[curarg].arg_index;
if (*s == '(') {
/* Has argument */
arg = ++s;
if ((s = strchr(s, ')'))) {
if (argloc)
args[argloc - 1] = arg;
*s++ = '\0';
} else {
ast_log(LOG_WARNING, "Missing closing parenthesis for argument '%c' in string '%s'\n", curarg, arg);
res = -1;
break;
}
} else if (argloc) {
args[argloc - 1] = "";
}
ast_set_flag(flags, options[curarg].flag);
}
return res;
}
/* the following function will probably only be used in app_dial, until app_dial is reorganized to
better handle the large number of options it provides. After it is, you need to get rid of this variant
-- unless, of course, someone else digs up some use for large flag fields. */
int ast_app_parse_options64(const struct ast_app_option *options, struct ast_flags64 *flags, char **args, char *optstr)
{
char *s, *arg;
int curarg, res = 0;
unsigned int argloc;
flags->flags = 0;
if (!optstr)
return 0;
s = optstr;
while (*s) {
curarg = *s++ & 0x7f; /* the array (in app.h) has 128 entries */
ast_set_flag64(flags, options[curarg].flag);
argloc = options[curarg].arg_index;
if (*s == '(') {
/* Has argument */
arg = ++s;
if ((s = strchr(s, ')'))) {
if (argloc)
args[argloc - 1] = arg;
*s++ = '\0';
} else {
ast_log(LOG_WARNING, "Missing closing parenthesis for argument '%c' in string '%s'\n", curarg, arg);
res = -1;
break;
}
} else if (argloc) {
args[argloc - 1] = NULL;
}
}
return res;
}
void ast_app_options2str64(const struct ast_app_option *options, struct ast_flags64 *flags, char *buf, size_t len)
{
unsigned int i, found = 0;
for (i = 32; i < 128 && found < len; i++) {
if (ast_test_flag64(flags, options[i].flag)) {
buf[found++] = i;
}
}
buf[found] = '\0';
}
int ast_get_encoded_char(const char *stream, char *result, size_t *consumed)
{
int i;
*consumed = 1;
*result = 0;
if (*stream == '\\') {
*consumed = 2;
switch (*(stream + 1)) {
case 'n':
*result = '\n';
break;
case 'r':
*result = '\r';
break;
case 't':
*result = '\t';
break;
case 'x':
/* Hexadecimal */
if (strchr("0123456789ABCDEFabcdef", *(stream + 2)) && *(stream + 2) != '\0') {
*consumed = 3;
if (*(stream + 2) <= '9')
*result = *(stream + 2) - '0';
else if (*(stream + 2) <= 'F')
*result = *(stream + 2) - 'A' + 10;
else
*result = *(stream + 2) - 'a' + 10;
} else {
ast_log(LOG_ERROR, "Illegal character '%c' in hexadecimal string\n", *(stream + 2));
return -1;
}
if (strchr("0123456789ABCDEFabcdef", *(stream + 3)) && *(stream + 3) != '\0') {
*consumed = 4;
*result <<= 4;
if (*(stream + 3) <= '9')
*result += *(stream + 3) - '0';
else if (*(stream + 3) <= 'F')
*result += *(stream + 3) - 'A' + 10;
else
*result += *(stream + 3) - 'a' + 10;
}
break;
case '0':
/* Octal */
*consumed = 2;
for (i = 2; ; i++) {
if (strchr("01234567", *(stream + i)) && *(stream + i) != '\0') {
(*consumed)++;
ast_debug(5, "result was %d, ", *result);
*result <<= 3;
*result += *(stream + i) - '0';
ast_debug(5, "is now %d\n", *result);
} else
break;
}
break;
default:
*result = *(stream + 1);
}
} else {
*result = *stream;
*consumed = 1;
}
return 0;
}
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