Asterisk - The Open Source Telephony Project  18.5.0
parking_devicestate.c
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1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2013, Digium, Inc.
5  *
6  * Jonathan Rose <[email protected]>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18 
19 /*! \file
20  *
21  * \brief Call Parking Device State Management
22  *
23  * \author Jonathan Rose <[email protected]>
24  */
25 
26 #include "asterisk.h"
27 #include "asterisk/logger.h"
28 #include "res_parking.h"
29 #include "asterisk/devicestate.h"
30 
32  char *context;
33  int exten;
34 };
35 
36 static int retrieve_parked_user_targeted(void *obj, void *arg, int flags)
37 {
38  int *target = arg;
39  struct parked_user *user = obj;
40  if (user->parking_space == *target) {
41  return CMP_MATCH;
42  }
43 
44  return 0;
45 }
46 
47 static int parking_lot_search_context_extension_inuse(void *obj, void *arg, int flags)
48 {
49  struct parking_lot *lot = obj;
50  struct parking_lot_extension_inuse_search *search = arg;
52 
53  if (strcmp(lot->cfg->parking_con, search->context)) {
54  return 0;
55  }
56 
57  if ((search->exten < lot->cfg->parking_start) || (search->exten > lot->cfg->parking_stop)) {
58  return 0;
59  }
60 
62  if (!user) {
63  return 0;
64  }
65 
66  ao2_lock(user);
67  if (user->resolution != PARK_UNSET) {
68  /* The parked user isn't in an answerable state. */
70  return 0;
71  }
73 
74  return CMP_MATCH;
75 }
76 
77 static enum ast_device_state metermaidstate(const char *data)
78 {
79  struct ao2_container *global_lots = get_parking_lot_container();
80  RAII_VAR(struct parking_lot *, lot, NULL, ao2_cleanup);
81  char *context;
82  char *exten;
83  struct parking_lot_extension_inuse_search search = {};
84 
85  context = ast_strdupa(data);
86 
87  exten = strsep(&context, "@");
88 
89  if (ast_strlen_zero(context) || ast_strlen_zero(exten)) {
90  return AST_DEVICE_INVALID;
91  }
92 
93  search.context = context;
94  if (sscanf(exten, "%d", &search.exten) != 1) {
95  return AST_DEVICE_INVALID;
96  }
97 
98  ast_debug(4, "Checking state of exten %d in context %s\n", search.exten, context);
99 
100  lot = ao2_callback(global_lots, 0, parking_lot_search_context_extension_inuse, &data);
101  if (!lot) {
102  return AST_DEVICE_NOT_INUSE;
103  }
104 
105  return AST_DEVICE_INUSE;
106 }
107 
109 {
110  ast_debug(4, "Notification of state change to metermaids %[email protected]%s\n to state '%s'\n",
111  exten, context, ast_devstate2str(state));
112 
113  ast_devstate_changed(state, AST_DEVSTATE_CACHABLE, "park:%[email protected]%s", exten, context);
114 }
115 
117 {
118  ast_devstate_prov_del("Park");
119 }
120 
122 {
123  return ast_devstate_prov_add("Park", metermaidstate);
124 }
const char * ast_devstate2str(enum ast_device_state devstate) attribute_pure
Convert device state to text string for output.
Definition: devicestate.c:237
ast_device_state
Device States.
Definition: devicestate.h:52
Asterisk main include file. File version handling, generic pbx functions.
void parking_notify_metermaids(int exten, const char *context, enum ast_device_state state)
Notify metermaids that we&#39;ve changed an extension.
Device state management.
struct ao2_container * parked_users
Definition: res_parking.h:95
#define ao2_callback(c, flags, cb_fn, arg)
Definition: astobj2.h:1716
static enum ast_device_state metermaidstate(const char *data)
int ast_devstate_prov_del(const char *label)
Remove device state provider.
Definition: devicestate.c:418
int ast_devstate_prov_add(const char *label, ast_devstate_prov_cb_type callback)
Add device state provider.
Definition: devicestate.c:391
#define ao2_unlock(a)
Definition: astobj2.h:730
#define NULL
Definition: resample.c:96
struct ao2_container * get_parking_lot_container(void)
Get a pointer to the parking lot container for purposes such as iteration.
Definition: res_parking.c:596
static int parking_lot_search_context_extension_inuse(void *obj, void *arg, int flags)
#define ast_strlen_zero(foo)
Definition: strings.h:52
void unload_parking_devstate(void)
Unregister Parking devstate handler.
#define ast_debug(level,...)
Log a DEBUG message.
Definition: logger.h:452
int ast_devstate_changed(enum ast_device_state state, enum ast_devstate_cache cachable, const char *fmt,...)
Tells Asterisk the State for Device is changed.
Definition: devicestate.c:510
const ast_string_field parking_con
Definition: res_parking.h:89
#define RAII_VAR(vartype, varname, initval, dtor)
Declare a variable that will call a destructor function when it goes out of scope.
Definition: utils.h:911
int parking_space
Definition: res_parking.h:107
#define ao2_lock(a)
Definition: astobj2.h:718
#define ast_strdupa(s)
duplicate a string in memory from the stack
Definition: astmm.h:300
structure to hold users read from users.conf
Support for logging to various files, console and syslog Configuration in file logger.conf.
char * strsep(char **str, const char *delims)
#define ao2_cleanup(obj)
Definition: astobj2.h:1958
int load_parking_devstate(void)
Register Parking devstate handler.
Call Parking Resource Internal API.
Generic container type.
static int retrieve_parked_user_targeted(void *obj, void *arg, int flags)
struct parking_lot_cfg * cfg
Definition: res_parking.h:96