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Remove chan_features.

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Review: http://reviewboard.digium.com/r/161/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@176100 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2009-02-16 17:09:24 +00:00
parent 8d00e7a6ed
commit 0aa256715c
1 changed files with 0 additions and 572 deletions
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572
channels/chan_features.c
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@@ -1,572 +0,0 @@
/*
* 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 feature Proxy Channel
*
* \author Mark Spencer <markster@digium.com>
*
* \note *** Experimental code ****
*
* \ingroup channel_drivers
*/
/*** MODULEINFO
<defaultenabled>no</defaultenabled>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <fcntl.h>
#include <sys/signal.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/sched.h"
#include "asterisk/io.h"
#include "asterisk/rtp.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/file.h"
#include "asterisk/cli.h"
#include "asterisk/app.h"
#include "asterisk/musiconhold.h"
#include "asterisk/manager.h"
#include "asterisk/stringfields.h"
static const char tdesc[] = "Feature Proxy Channel Driver";
#define IS_OUTBOUND(a,b) (a == b->chan ? 1 : 0)
struct feature_sub {
struct ast_channel *owner;
int inthreeway;
int pfd;
int timingfdbackup;
int alertpipebackup[2];
};
struct feature_pvt {
ast_mutex_t lock; /* Channel private lock */
char tech[AST_MAX_EXTENSION]; /* Technology to abstract */
char dest[AST_MAX_EXTENSION]; /* Destination to abstract */
struct ast_channel *subchan;
struct feature_sub subs[3]; /* Subs */
struct ast_channel *owner; /* Current Master Channel */
AST_LIST_ENTRY(feature_pvt) list; /* Next entity */
};
static AST_LIST_HEAD_STATIC(features, feature_pvt);
#define SUB_REAL 0 /* Active call */
#define SUB_CALLWAIT 1 /* Call-Waiting call on hold */
#define SUB_THREEWAY 2 /* Three-way call */
static struct ast_channel *features_request(const char *type, int format, void *data, int *cause);
static int features_digit_begin(struct ast_channel *ast, char digit);
static int features_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
static int features_call(struct ast_channel *ast, char *dest, int timeout);
static int features_hangup(struct ast_channel *ast);
static int features_answer(struct ast_channel *ast);
static struct ast_frame *features_read(struct ast_channel *ast);
static int features_write(struct ast_channel *ast, struct ast_frame *f);
static int features_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
static int features_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
static const struct ast_channel_tech features_tech = {
.type = "Feature",
.description = tdesc,
.capabilities = -1,
.requester = features_request,
.send_digit_begin = features_digit_begin,
.send_digit_end = features_digit_end,
.call = features_call,
.hangup = features_hangup,
.answer = features_answer,
.read = features_read,
.write = features_write,
.exception = features_read,
.indicate = features_indicate,
.fixup = features_fixup,
};
static inline void init_sub(struct feature_sub *sub)
{
sub->inthreeway = 0;
sub->pfd = -1;
sub->timingfdbackup = -1;
sub->alertpipebackup[0] = sub->alertpipebackup[1] = -1;
}
static inline int indexof(struct feature_pvt *p, struct ast_channel *owner, int nullok)
{
int x;
if (!owner) {
ast_log(LOG_WARNING, "indexof called on NULL owner??\n");
return -1;
}
for (x=0; x<3; x++) {
if (owner == p->subs[x].owner)
return x;
}
return -1;
}
#if 0
static void wakeup_sub(struct feature_pvt *p, int a)
{
struct ast_frame null = { AST_FRAME_NULL, };
for (;;) {
if (p->subs[a].owner) {
if (ast_mutex_trylock(&p->subs[a].owner->lock)) {
DEADLOCK_AVOIDANCE(&p->lock);
} else {
ast_queue_frame(p->subs[a].owner, &null);
ast_mutex_unlock(&p->subs[a].owner->lock);
break;
}
} else
break;
}
}
#endif
static void restore_channel(struct feature_pvt *p, int idx)
{
/* Restore timing/alertpipe */
p->subs[idx].owner->timingfd = p->subs[idx].timingfdbackup;
p->subs[idx].owner->alertpipe[0] = p->subs[idx].alertpipebackup[0];
p->subs[idx].owner->alertpipe[1] = p->subs[idx].alertpipebackup[1];
ast_channel_set_fd(p->subs[idx].owner, AST_ALERT_FD, p->subs[idx].alertpipebackup[0]);
ast_channel_set_fd(p->subs[idx].owner, AST_TIMING_FD, p->subs[idx].timingfdbackup);
}
static void update_features(struct feature_pvt *p, int idx)
{
int x;
if (p->subs[idx].owner) {
for (x=0; x<AST_MAX_FDS; x++) {
if (idx)
ast_channel_set_fd(p->subs[idx].owner, x, -1);
else
ast_channel_set_fd(p->subs[idx].owner, x, p->subchan->fds[x]);
}
if (!idx) {
/* Copy timings from master channel */
p->subs[idx].owner->timingfd = p->subchan->timingfd;
p->subs[idx].owner->alertpipe[0] = p->subchan->alertpipe[0];
p->subs[idx].owner->alertpipe[1] = p->subchan->alertpipe[1];
if (p->subs[idx].owner->nativeformats != p->subchan->readformat) {
p->subs[idx].owner->nativeformats = p->subchan->readformat;
if (p->subs[idx].owner->readformat)
ast_set_read_format(p->subs[idx].owner, p->subs[idx].owner->readformat);
if (p->subs[idx].owner->writeformat)
ast_set_write_format(p->subs[idx].owner, p->subs[idx].owner->writeformat);
}
} else{
restore_channel(p, idx);
}
}
}
#if 0
static void swap_subs(struct feature_pvt *p, int a, int b)
{
int tinthreeway;
struct ast_channel *towner;
ast_debug(1, "Swapping %d and %d\n", a, b);
towner = p->subs[a].owner;
tinthreeway = p->subs[a].inthreeway;
p->subs[a].owner = p->subs[b].owner;
p->subs[a].inthreeway = p->subs[b].inthreeway;
p->subs[b].owner = towner;
p->subs[b].inthreeway = tinthreeway;
update_features(p,a);
update_features(p,b);
wakeup_sub(p, a);
wakeup_sub(p, b);
}
#endif
static int features_answer(struct ast_channel *ast)
{
struct feature_pvt *p = ast->tech_pvt;
int res = -1;
int x;
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan)
res = ast_answer(p->subchan);
ast_mutex_unlock(&p->lock);
return res;
}
static struct ast_frame *features_read(struct ast_channel *ast)
{
struct feature_pvt *p = ast->tech_pvt;
struct ast_frame *f;
int x;
f = &ast_null_frame;
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan) {
update_features(p, x);
f = ast_read(p->subchan);
}
ast_mutex_unlock(&p->lock);
return f;
}
static int features_write(struct ast_channel *ast, struct ast_frame *f)
{
struct feature_pvt *p = ast->tech_pvt;
int res = -1;
int x;
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan)
res = ast_write(p->subchan, f);
ast_mutex_unlock(&p->lock);
return res;
}
static int features_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
struct feature_pvt *p = newchan->tech_pvt;
int x;
ast_mutex_lock(&p->lock);
if (p->owner == oldchan)
p->owner = newchan;
for (x = 0; x < 3; x++) {
if (p->subs[x].owner == oldchan)
p->subs[x].owner = newchan;
}
ast_mutex_unlock(&p->lock);
return 0;
}
static int features_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
{
struct feature_pvt *p = ast->tech_pvt;
int res = -1;
int x;
/* Queue up a frame representing the indication as a control frame */
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan)
res = ast_indicate(p->subchan, condition);
ast_mutex_unlock(&p->lock);
return res;
}
static int features_digit_begin(struct ast_channel *ast, char digit)
{
struct feature_pvt *p = ast->tech_pvt;
int res = -1;
int x;
/* Queue up a frame representing the indication as a control frame */
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan)
res = ast_senddigit_begin(p->subchan, digit);
ast_mutex_unlock(&p->lock);
return res;
}
static int features_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
{
struct feature_pvt *p = ast->tech_pvt;
int res = -1;
int x;
/* Queue up a frame representing the indication as a control frame */
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan)
res = ast_senddigit_end(p->subchan, digit, duration);
ast_mutex_unlock(&p->lock);
return res;
}
static int features_call(struct ast_channel *ast, char *dest, int timeout)
{
struct feature_pvt *p = ast->tech_pvt;
int res = -1;
int x;
char *dest2;
dest2 = strchr(dest, '/');
if (dest2) {
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (!x && p->subchan) {
p->subchan->cid.cid_num = ast_strdup(p->owner->cid.cid_num);
p->subchan->cid.cid_name = ast_strdup(p->owner->cid.cid_name);
p->subchan->cid.cid_rdnis = ast_strdup(p->owner->cid.cid_rdnis);
p->subchan->cid.cid_ani = ast_strdup(p->owner->cid.cid_ani);
p->subchan->cid.cid_pres = p->owner->cid.cid_pres;
ast_string_field_set(p->subchan, language, p->owner->language);
ast_string_field_set(p->subchan, accountcode, p->owner->accountcode);
p->subchan->cdrflags = p->owner->cdrflags;
res = ast_call(p->subchan, dest2, timeout);
update_features(p, x);
} else
ast_log(LOG_NOTICE, "Uhm yah, not quite there with the call waiting...\n");
ast_mutex_unlock(&p->lock);
}
return res;
}
static int features_hangup(struct ast_channel *ast)
{
struct feature_pvt *p = ast->tech_pvt;
int x;
ast_mutex_lock(&p->lock);
x = indexof(p, ast, 0);
if (x > -1) {
restore_channel(p, x);
p->subs[x].owner = NULL;
/* XXX Re-arrange, unconference, etc XXX */
}
ast->tech_pvt = NULL;
if (!p->subs[SUB_REAL].owner && !p->subs[SUB_CALLWAIT].owner && !p->subs[SUB_THREEWAY].owner) {
ast_mutex_unlock(&p->lock);
/* Remove from list */
AST_LIST_LOCK(&features);
AST_LIST_REMOVE(&features, p, list);
AST_LIST_UNLOCK(&features);
ast_mutex_lock(&p->lock);
/* And destroy */
if (p->subchan)
ast_hangup(p->subchan);
ast_mutex_unlock(&p->lock);
ast_mutex_destroy(&p->lock);
ast_free(p);
return 0;
}
ast_mutex_unlock(&p->lock);
return 0;
}
static struct feature_pvt *features_alloc(char *data, int format)
{
struct feature_pvt *tmp;
char *dest=NULL;
char *tech;
int x;
int status;
struct ast_channel *chan;
tech = ast_strdupa(data);
if (tech) {
dest = strchr(tech, '/');
if (dest) {
*dest = '\0';
dest++;
}
}
if (!tech || !dest) {
ast_log(LOG_NOTICE, "Format for feature channel is Feature/Tech/Dest ('%s' not valid)!\n",
data);
return NULL;
}
AST_LIST_LOCK(&features);
AST_LIST_TRAVERSE(&features, tmp, list) {
if (!strcasecmp(tmp->tech, tech) && !strcmp(tmp->dest, dest))
break;
}
AST_LIST_UNLOCK(&features);
if (!tmp) {
chan = ast_request(tech, format, dest, &status);
if (!chan) {
ast_log(LOG_NOTICE, "Unable to allocate subchannel '%s/%s'\n", tech, dest);
return NULL;
}
tmp = ast_calloc(1, sizeof(*tmp));
if (tmp) {
for (x=0;x<3;x++)
init_sub(tmp->subs + x);
ast_mutex_init(&tmp->lock);
ast_copy_string(tmp->tech, tech, sizeof(tmp->tech));
ast_copy_string(tmp->dest, dest, sizeof(tmp->dest));
tmp->subchan = chan;
AST_LIST_LOCK(&features);
AST_LIST_INSERT_HEAD(&features, tmp, list);
AST_LIST_UNLOCK(&features);
}
}
return tmp;
}
static struct ast_channel *features_new(struct feature_pvt *p, int state, int idx)
{
struct ast_channel *tmp;
int x,y;
char *b2 = 0;
if (!p->subchan) {
ast_log(LOG_WARNING, "Called upon channel with no subchan:(\n");
return NULL;
}
if (p->subs[idx].owner) {
ast_log(LOG_WARNING, "Called to put index %d already there!\n", idx);
return NULL;
}
/* figure out what you want the name to be */
for (x=1;x<4;x++) {
if (b2)
ast_free(b2);
if (asprintf(&b2, "%s/%s-%d", p->tech, p->dest, x) < 0) {
ast_log(LOG_WARNING, "Unable to create channel name: %s\n", strerror(errno));
b2 = NULL;
continue;
}
for (y=0;y<3;y++) {
if (y == idx)
continue;
if (p->subs[y].owner && !strcasecmp(p->subs[y].owner->name, b2))
break;
}
if (y >= 3)
break;
}
tmp = ast_channel_alloc(0, state, 0,0, "", "", "", 0, "Feature/%s", b2);
/* free up the name, it was copied into the channel name */
if (b2)
ast_free(b2);
if (!tmp) {
ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
return NULL;
}
tmp->tech = &features_tech;
tmp->writeformat = p->subchan->writeformat;
tmp->rawwriteformat = p->subchan->rawwriteformat;
tmp->readformat = p->subchan->readformat;
tmp->rawreadformat = p->subchan->rawreadformat;
tmp->nativeformats = p->subchan->readformat;
tmp->tech_pvt = p;
p->subs[idx].owner = tmp;
if (!p->owner)
p->owner = tmp;
ast_module_ref(ast_module_info->self);
return tmp;
}
static struct ast_channel *features_request(const char *type, int format, void *data, int *cause)
{
struct feature_pvt *p;
struct ast_channel *chan = NULL;
p = features_alloc(data, format);
if (p && !p->subs[SUB_REAL].owner)
chan = features_new(p, AST_STATE_DOWN, SUB_REAL);
if (chan)
update_features(p,SUB_REAL);
return chan;
}
static char *features_show(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
struct feature_pvt *p;
switch (cmd) {
case CLI_INIT:
e->command = "features show channels";
e->usage =
"Usage: features show channels\n"
" Provides summary information on feature channels.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc != 3)
return CLI_SHOWUSAGE;
if (AST_LIST_EMPTY(&features)) {
ast_cli(a->fd, "No feature channels in use\n");
return CLI_SUCCESS;
}
AST_LIST_LOCK(&features);
AST_LIST_TRAVERSE(&features, p, list) {
ast_mutex_lock(&p->lock);
ast_cli(a->fd, "%s -- %s/%s\n", p->owner ? p->owner->name : "<unowned>", p->tech, p->dest);
ast_mutex_unlock(&p->lock);
}
AST_LIST_UNLOCK(&features);
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_features[] = {
AST_CLI_DEFINE(features_show, "List status of feature channels"),
};
static int load_module(void)
{
/* Make sure we can register our sip channel type */
if (ast_channel_register(&features_tech)) {
ast_log(LOG_ERROR, "Unable to register channel class 'Feature'\n");
return AST_MODULE_LOAD_FAILURE;
}
ast_cli_register_multiple(cli_features, sizeof(cli_features) / sizeof(struct ast_cli_entry));
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
struct feature_pvt *p;
/* First, take us out of the channel loop */
ast_cli_unregister_multiple(cli_features, sizeof(cli_features) / sizeof(struct ast_cli_entry));
ast_channel_unregister(&features_tech);
if (!AST_LIST_LOCK(&features))
return -1;
/* Hangup all interfaces if they have an owner */
while ((p = AST_LIST_REMOVE_HEAD(&features, list))) {
if (p->owner)
ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
ast_free(p);
}
AST_LIST_UNLOCK(&features);
return 0;
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Feature Proxy Channel");