Remove chan_features.
authorRussell Bryant <russell@russellbryant.com>
Mon, 16 Feb 2009 17:09:24 +0000 (17:09 +0000)
committerRussell Bryant <russell@russellbryant.com>
Mon, 16 Feb 2009 17:09:24 +0000 (17:09 +0000)
Review: http://reviewboard.digium.com/r/161/

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@176100 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_features.c [deleted file]

diff --git a/channels/chan_features.c b/channels/chan_features.c
deleted file mode 100644 (file)
index 49400ad..0000000
+++ /dev/null
@@ -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");
-