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Diffstat (limited to '1.2-netsec/devicestate.c')
-rw-r--r-- | 1.2-netsec/devicestate.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/1.2-netsec/devicestate.c b/1.2-netsec/devicestate.c deleted file mode 100644 index b19709152..000000000 --- a/1.2-netsec/devicestate.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * 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 Device state management - * - */ - -#include <sys/types.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> -#include <stdio.h> - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include "asterisk/channel.h" -#include "asterisk/utils.h" -#include "asterisk/lock.h" -#include "asterisk/linkedlists.h" -#include "asterisk/logger.h" -#include "asterisk/devicestate.h" -#include "asterisk/pbx.h" -#include "asterisk/options.h" - -static const char *devstatestring[] = { - /* 0 AST_DEVICE_UNKNOWN */ "Unknown", /* Valid, but unknown state */ - /* 1 AST_DEVICE_NOT_INUSE */ "Not in use", /* Not used */ - /* 2 AST_DEVICE IN USE */ "In use", /* In use */ - /* 3 AST_DEVICE_BUSY */ "Busy", /* Busy */ - /* 4 AST_DEVICE_INVALID */ "Invalid", /* Invalid - not known to Asterisk */ - /* 5 AST_DEVICE_UNAVAILABLE */ "Unavailable", /* Unavailable (not registred) */ - /* 6 AST_DEVICE_RINGING */ "Ringing" /* Ring, ring, ring */ -}; - -/* ast_devstate_cb: A device state watcher (callback) */ -struct devstate_cb { - void *data; - ast_devstate_cb_type callback; - AST_LIST_ENTRY(devstate_cb) list; -}; - -static AST_LIST_HEAD_STATIC(devstate_cbs, devstate_cb); - -struct state_change { - AST_LIST_ENTRY(state_change) list; - char device[1]; -}; - -static AST_LIST_HEAD_STATIC(state_changes, state_change); - -static pthread_t change_thread = AST_PTHREADT_NULL; -static ast_cond_t change_pending; - -/*--- devstate2str: Find devicestate as text message for output */ -const char *devstate2str(int devstate) -{ - return devstatestring[devstate]; -} - -/*--- ast_parse_device_state: Find out if device is active in a call or not */ -int ast_parse_device_state(const char *device) -{ - struct ast_channel *chan; - char match[AST_CHANNEL_NAME]; - int res; - - ast_copy_string(match, device, sizeof(match)-1); - strcat(match, "-"); - chan = ast_get_channel_by_name_prefix_locked(match, strlen(match)); - - if (!chan) - return AST_DEVICE_UNKNOWN; - - if (chan->_state == AST_STATE_RINGING) - res = AST_DEVICE_RINGING; - else - res = AST_DEVICE_INUSE; - - ast_mutex_unlock(&chan->lock); - - return res; -} - -/*--- ast_device_state: Check device state through channel specific function or generic function */ -int ast_device_state(const char *device) -{ - char *buf; - char *tech; - char *number; - const struct ast_channel_tech *chan_tech; - int res = 0; - - buf = ast_strdupa(device); - tech = strsep(&buf, "/"); - number = buf; - if (!number) - return AST_DEVICE_INVALID; - - chan_tech = ast_get_channel_tech(tech); - if (!chan_tech) - return AST_DEVICE_INVALID; - - if (!chan_tech->devicestate) /* Does the channel driver support device state notification? */ - return ast_parse_device_state(device); /* No, try the generic function */ - else { - res = chan_tech->devicestate(number); /* Ask the channel driver for device state */ - if (res == AST_DEVICE_UNKNOWN) { - res = ast_parse_device_state(device); - /* at this point we know the device exists, but the channel driver - could not give us a state; if there is no channel state available, - it must be 'not in use' - */ - if (res == AST_DEVICE_UNKNOWN) - res = AST_DEVICE_NOT_INUSE; - return res; - } else - return res; - } -} - -/*--- ast_devstate_add: Add device state watcher */ -int ast_devstate_add(ast_devstate_cb_type callback, void *data) -{ - struct devstate_cb *devcb; - - if (!callback) - return -1; - - devcb = calloc(1, sizeof(*devcb)); - if (!devcb) - return -1; - - devcb->data = data; - devcb->callback = callback; - - AST_LIST_LOCK(&devstate_cbs); - AST_LIST_INSERT_HEAD(&devstate_cbs, devcb, list); - AST_LIST_UNLOCK(&devstate_cbs); - - return 0; -} - -/*--- ast_devstate_del: Remove device state watcher */ -void ast_devstate_del(ast_devstate_cb_type callback, void *data) -{ - struct devstate_cb *devcb; - - AST_LIST_LOCK(&devstate_cbs); - AST_LIST_TRAVERSE_SAFE_BEGIN(&devstate_cbs, devcb, list) { - if ((devcb->callback == callback) && (devcb->data == data)) { - AST_LIST_REMOVE_CURRENT(&devstate_cbs, list); - free(devcb); - break; - } - } - AST_LIST_TRAVERSE_SAFE_END; - AST_LIST_UNLOCK(&devstate_cbs); -} - -/*--- do_state_change: Notify callback watchers of change, and notify PBX core for hint updates */ -static void do_state_change(const char *device) -{ - int state; - struct devstate_cb *devcb; - - state = ast_device_state(device); - if (option_debug > 2) - ast_log(LOG_DEBUG, "Changing state for %s - state %d (%s)\n", device, state, devstate2str(state)); - - AST_LIST_LOCK(&devstate_cbs); - AST_LIST_TRAVERSE(&devstate_cbs, devcb, list) - devcb->callback(device, state, devcb->data); - AST_LIST_UNLOCK(&devstate_cbs); - - ast_hint_state_changed(device); -} - -static int __ast_device_state_changed_literal(char *buf) -{ - char *device, *tmp; - struct state_change *change = NULL; - - device = buf; - tmp = strrchr(device, '-'); - if (tmp) - *tmp = '\0'; - if (change_thread != AST_PTHREADT_NULL) - change = calloc(1, sizeof(*change) + strlen(device)); - - if (!change) { - /* we could not allocate a change struct, or */ - /* there is no background thread, so process the change now */ - do_state_change(device); - } else { - /* queue the change */ - strcpy(change->device, device); - AST_LIST_LOCK(&state_changes); - AST_LIST_INSERT_TAIL(&state_changes, change, list); - if (AST_LIST_FIRST(&state_changes) == change) - /* the list was empty, signal the thread */ - ast_cond_signal(&change_pending); - AST_LIST_UNLOCK(&state_changes); - } - - return 1; -} - -int ast_device_state_changed_literal(const char *dev) -{ - char *buf; - buf = ast_strdupa(dev); - return __ast_device_state_changed_literal(buf); -} - -/*--- ast_device_state_changed: Accept change notification, add it to change queue */ -int ast_device_state_changed(const char *fmt, ...) -{ - char buf[AST_MAX_EXTENSION]; - va_list ap; - - va_start(ap, fmt); - vsnprintf(buf, sizeof(buf), fmt, ap); - va_end(ap); - return __ast_device_state_changed_literal(buf); -} - -/*--- do_devstate_changes: Go through the dev state change queue and update changes in the dev state thread */ -static void *do_devstate_changes(void *data) -{ - struct state_change *cur; - - AST_LIST_LOCK(&state_changes); - for(;;) { - /* the list lock will _always_ be held at this point in the loop */ - cur = AST_LIST_REMOVE_HEAD(&state_changes, list); - if (cur) { - /* we got an entry, so unlock the list while we process it */ - AST_LIST_UNLOCK(&state_changes); - do_state_change(cur->device); - free(cur); - AST_LIST_LOCK(&state_changes); - } else { - /* there was no entry, so atomically unlock the list and wait for - the condition to be signalled (returns with the lock held) */ - ast_cond_wait(&change_pending, &state_changes.lock); - } - } - - return NULL; -} - -/*--- ast_device_state_engine_init: Initialize the device state engine in separate thread */ -int ast_device_state_engine_init(void) -{ - ast_cond_init(&change_pending, NULL); - if (ast_pthread_create(&change_thread, NULL, do_devstate_changes, NULL) < 0) { - ast_log(LOG_ERROR, "Unable to start device state change thread.\n"); - return -1; - } - - return 0; -} |