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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2007, Digium, Inc.
*
* Russell Bryant <russell@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 Manually controlled blinky lights
*
* \author Russell Bryant <russell@digium.com>
*
* \ingroup functions
*
* \note Props go out to Ahrimanes in #asterisk for requesting this at 4:30 AM
* when I couldn't sleep. :)
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <stdlib.h>
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/utils.h"
#include "asterisk/linkedlists.h"
#include "asterisk/devicestate.h"
#include "asterisk/cli.h"
struct custom_device {
int state;
AST_RWLIST_ENTRY(custom_device) entry;
char name[1];
};
static AST_RWLIST_HEAD_STATIC(custom_devices, custom_device);
static int devstate_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
{
ast_copy_string(buf, ast_devstate_str(ast_device_state(data)), len);
return 0;
}
static int devstate_write(struct ast_channel *chan, const char *cmd, char *data, const char *value)
{
struct custom_device *dev;
int len = strlen("Custom:");
if (strncasecmp(data, "Custom:", len)) {
ast_log(LOG_WARNING, "The DEVSTATE function can only be used to set 'Custom:' device state!\n");
return -1;
}
data += len;
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "DEVSTATE function called with no custom device name!\n");
return -1;
}
AST_RWLIST_WRLOCK(&custom_devices);
AST_RWLIST_TRAVERSE(&custom_devices, dev, entry) {
if (!strcasecmp(dev->name, data))
break;
}
if (!dev) {
if (!(dev = ast_calloc(1, sizeof(*dev) + strlen(data) + 1))) {
AST_RWLIST_UNLOCK(&custom_devices);
return -1;
}
strcpy(dev->name, data);
AST_RWLIST_INSERT_HEAD(&custom_devices, dev, entry);
}
dev->state = ast_devstate_val(value);
ast_device_state_changed("Custom:%s", dev->name);
AST_RWLIST_UNLOCK(&custom_devices);
return 0;
}
static enum ast_device_state custom_devstate_callback(const char *data)
{
struct custom_device *dev;
enum ast_device_state state = AST_DEVICE_UNKNOWN;
AST_RWLIST_RDLOCK(&custom_devices);
AST_RWLIST_TRAVERSE(&custom_devices, dev, entry) {
if (!strcasecmp(dev->name, data)) {
state = dev->state;
break;
}
}
AST_RWLIST_UNLOCK(&custom_devices);
return state;
}
static char *cli_funcdevstate_list(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
struct custom_device *dev;
switch (cmd) {
case CLI_INIT:
e->command = "funcdevstate list";
e->usage =
"Usage: funcdevstate list\n"
" List all custom device states that have been set by using\n"
" the DEVSTATE dialplan function.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc != e->args)
return CLI_SHOWUSAGE;
ast_cli(a->fd, "\n"
"---------------------------------------------------------------------\n"
"--- Custom Device States --------------------------------------------\n"
"---------------------------------------------------------------------\n"
"---\n");
AST_RWLIST_RDLOCK(&custom_devices);
AST_RWLIST_TRAVERSE(&custom_devices, dev, entry) {
ast_cli(a->fd, "--- Name: 'Custom:%s' State: '%s'\n"
"---\n", dev->name, ast_devstate_str(dev->state));
}
AST_RWLIST_UNLOCK(&custom_devices);
ast_cli(a->fd,
"---------------------------------------------------------------------\n"
"---------------------------------------------------------------------\n"
"\n");
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_funcdevstate[] = {
NEW_CLI(cli_funcdevstate_list, "List currently known custom device states"),
};
static struct ast_custom_function devstate_function = {
.name = "DEVSTATE",
.synopsis = "Get or Set a device state",
.syntax = "DEVSTATE(device)",
.desc =
" The DEVSTATE function can be used to retrieve the device state from any\n"
"device state provider. For example:\n"
" NoOp(SIP/mypeer has state ${DEVSTATE(SIP/mypeer)})\n"
" NoOp(Conference number 1234 has state ${DEVSTATE(MeetMe:1234)})\n"
"\n"
" The DEVSTATE function can also be used to set custom device state from\n"
"the dialplan. The \"Custom:\" prefix must be used. For example:\n"
" Set(DEVSTATE(Custom:lamp1)=BUSY)\n"
" Set(DEVSTATE(Custom:lamp2)=NOT_INUSE)\n"
"You can subscribe to the status of a custom device state using a hint in\n"
"the dialplan:\n"
" exten => 1234,hint,Custom:lamp1\n"
"\n"
" The possible values for both uses of this function are:\n"
"UNKNOWN | NOT_INUSE | INUSE | BUSY | INVALID | UNAVAILABLE | RINGING\n"
"RINGINUSE | ONHOLD\n",
.read = devstate_read,
.write = devstate_write,
};
static int unload_module(void)
{
struct custom_device *dev;
int res = 0;
res |= ast_custom_function_unregister(&devstate_function);
res |= ast_devstate_prov_del("Custom");
res |= ast_cli_unregister_multiple(cli_funcdevstate, ARRAY_LEN(cli_funcdevstate));
AST_RWLIST_WRLOCK(&custom_devices);
while ((dev = AST_RWLIST_REMOVE_HEAD(&custom_devices, entry)))
ast_free(dev);
AST_RWLIST_UNLOCK(&custom_devices);
return res;
}
static int load_module(void)
{
int res = 0;
res |= ast_custom_function_register(&devstate_function);
res |= ast_devstate_prov_add("Custom", custom_devstate_callback);
res |= ast_cli_register_multiple(cli_funcdevstate, ARRAY_LEN(cli_funcdevstate));
return res;
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Gets or sets a device state in the dialplan");
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