https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r90432 | tilghman | 2007-12-02 03:34:23 -0600 (Sun, 02 Dec 2007) | 7 lines Clarify the return value on autoservice. Specifically, if you started autoservice and autoservice was already on, it would erroneously return an error. Reported by: adiemus Patch by: dimas (Closes issue #11433) ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@90433 65c4cc65-6c06-0410-ace0-fbb531ad65f3
221 lines
5.1 KiB
C
221 lines
5.1 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2006, 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 Automatic channel service routines
|
|
*
|
|
* \author Mark Spencer <markster@digium.com>
|
|
*/
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include <sys/time.h>
|
|
#include <signal.h>
|
|
|
|
#include "asterisk/pbx.h"
|
|
#include "asterisk/frame.h"
|
|
#include "asterisk/sched.h"
|
|
#include "asterisk/channel.h"
|
|
#include "asterisk/file.h"
|
|
#include "asterisk/translate.h"
|
|
#include "asterisk/manager.h"
|
|
#include "asterisk/chanvars.h"
|
|
#include "asterisk/linkedlists.h"
|
|
#include "asterisk/indications.h"
|
|
#include "asterisk/lock.h"
|
|
#include "asterisk/utils.h"
|
|
|
|
#define MAX_AUTOMONS 256
|
|
|
|
struct asent {
|
|
struct ast_channel *chan;
|
|
/*! This gets incremented each time autoservice gets started on the same
|
|
* channel. It will ensure that it doesn't actually get stopped until
|
|
* it gets stopped for the last time. */
|
|
unsigned int use_count;
|
|
AST_LIST_HEAD_NOLOCK(, ast_frame) dtmf_frames;
|
|
AST_LIST_ENTRY(asent) list;
|
|
};
|
|
|
|
static AST_RWLIST_HEAD_STATIC(aslist, asent);
|
|
|
|
static pthread_t asthread = AST_PTHREADT_NULL;
|
|
|
|
static void *autoservice_run(void *ign)
|
|
{
|
|
|
|
for (;;) {
|
|
struct ast_channel *mons[MAX_AUTOMONS], *chan;
|
|
struct asent *as;
|
|
int x = 0, ms = 500;
|
|
|
|
AST_RWLIST_RDLOCK(&aslist);
|
|
AST_RWLIST_TRAVERSE(&aslist, as, list) {
|
|
if (!ast_check_hangup(as->chan)) {
|
|
if (x < MAX_AUTOMONS)
|
|
mons[x++] = as->chan;
|
|
else
|
|
ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n");
|
|
}
|
|
}
|
|
AST_RWLIST_UNLOCK(&aslist);
|
|
|
|
if ((chan = ast_waitfor_n(mons, x, &ms))) {
|
|
struct ast_frame *f = ast_read(chan);
|
|
|
|
if (!f)
|
|
continue;
|
|
|
|
/* Do not add a default entry in this switch statement. Each new
|
|
* frame type should be addressed directly as to whether it should
|
|
* be queued up or not. */
|
|
switch (f->frametype) {
|
|
/* Save these frames */
|
|
case AST_FRAME_DTMF_BEGIN:
|
|
case AST_FRAME_DTMF_END:
|
|
case AST_FRAME_CONTROL:
|
|
case AST_FRAME_TEXT:
|
|
case AST_FRAME_IMAGE:
|
|
case AST_FRAME_HTML:
|
|
{
|
|
struct ast_frame *dup_f;
|
|
|
|
AST_RWLIST_WRLOCK(&aslist);
|
|
AST_RWLIST_TRAVERSE(&aslist, as, list) {
|
|
if (as->chan != chan)
|
|
continue;
|
|
if ((dup_f = ast_frdup(f)))
|
|
AST_LIST_INSERT_TAIL(&as->dtmf_frames, dup_f, frame_list);
|
|
}
|
|
AST_RWLIST_UNLOCK(&aslist);
|
|
}
|
|
|
|
/* Throw these frames away */
|
|
case AST_FRAME_VOICE:
|
|
case AST_FRAME_VIDEO:
|
|
case AST_FRAME_NULL:
|
|
case AST_FRAME_IAX:
|
|
case AST_FRAME_CNG:
|
|
case AST_FRAME_MODEM:
|
|
break;
|
|
}
|
|
|
|
if (f)
|
|
ast_frfree(f);
|
|
}
|
|
}
|
|
|
|
asthread = AST_PTHREADT_NULL;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int ast_autoservice_start(struct ast_channel *chan)
|
|
{
|
|
int res = 0;
|
|
struct asent *as;
|
|
|
|
AST_RWLIST_WRLOCK(&aslist);
|
|
|
|
/* Check if the channel already has autoservice */
|
|
AST_RWLIST_TRAVERSE(&aslist, as, list) {
|
|
if (as->chan == chan) {
|
|
as->use_count++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If not, start autoservice on channel */
|
|
if (as) {
|
|
/* Entry extist, autoservice is already handling this channel */
|
|
} else if ((as = ast_calloc(1, sizeof(*as))) == NULL) {
|
|
/* Memory allocation failed */
|
|
res = -1;
|
|
} else {
|
|
/* New entry created */
|
|
as->chan = chan;
|
|
as->use_count = 1;
|
|
AST_RWLIST_INSERT_HEAD(&aslist, as, list);
|
|
if (asthread == AST_PTHREADT_NULL) { /* need start the thread */
|
|
if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) {
|
|
ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n");
|
|
/* There will only be a single member in the list at this point,
|
|
the one we just added. */
|
|
AST_RWLIST_REMOVE(&aslist, as, list);
|
|
ast_free(as);
|
|
res = -1;
|
|
} else
|
|
pthread_kill(asthread, SIGURG);
|
|
}
|
|
}
|
|
|
|
AST_RWLIST_UNLOCK(&aslist);
|
|
|
|
return res;
|
|
}
|
|
|
|
int ast_autoservice_stop(struct ast_channel *chan)
|
|
{
|
|
int res = -1;
|
|
struct asent *as;
|
|
AST_LIST_HEAD_NOLOCK(, ast_frame) dtmf_frames;
|
|
struct ast_frame *f;
|
|
int removed = 0;
|
|
|
|
AST_LIST_HEAD_INIT_NOLOCK(&dtmf_frames);
|
|
|
|
AST_RWLIST_WRLOCK(&aslist);
|
|
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) {
|
|
if (as->chan == chan) {
|
|
AST_RWLIST_REMOVE_CURRENT(list);
|
|
as->use_count--;
|
|
if (as->use_count)
|
|
break;
|
|
AST_LIST_APPEND_LIST(&dtmf_frames, &as->dtmf_frames, frame_list);
|
|
ast_free(as);
|
|
removed = 1;
|
|
if (!ast_check_hangup(chan))
|
|
res = 0;
|
|
break;
|
|
}
|
|
}
|
|
AST_RWLIST_TRAVERSE_SAFE_END;
|
|
|
|
if (removed && asthread != AST_PTHREADT_NULL)
|
|
pthread_kill(asthread, SIGURG);
|
|
|
|
AST_RWLIST_UNLOCK(&aslist);
|
|
|
|
if (!removed)
|
|
return 0;
|
|
|
|
/* Wait for it to un-block */
|
|
while (ast_test_flag(chan, AST_FLAG_BLOCKING))
|
|
usleep(1000);
|
|
|
|
while ((f = AST_LIST_REMOVE_HEAD(&dtmf_frames, frame_list))) {
|
|
ast_queue_frame(chan, f);
|
|
ast_frfree(f);
|
|
}
|
|
|
|
return res;
|
|
}
|