Asterisk - The Open Source Telephony Project GIT-master-25686a5
config_system.c
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1/*
2 * Asterisk -- An open source telephony toolkit.
3 *
4 * Copyright (C) 2013, Digium, Inc.
5 *
6 * Mark Michelson <mmichelson@digium.com>
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#include "asterisk.h"
20
21#include <pjsip.h>
22#include <pjlib.h>
23
24#include "asterisk/res_pjsip.h"
25#include "asterisk/sorcery.h"
27#include "asterisk/threadpool.h"
28#include "asterisk/dns.h"
30
31#define TIMER_T1_MIN 100
32#define DEFAULT_TIMER_T1 500
33#define DEFAULT_TIMER_B 32000
34
37 /*! Transaction Timer T1 value */
38 unsigned int timert1;
39 /*! Transaction Timer B value */
40 unsigned int timerb;
41 /*! Should we use short forms for headers? */
42 unsigned int compactheaders;
43 struct {
44 /*! Initial number of threads in the threadpool */
46 /*! The amount by which the number of threads is incremented when necessary */
48 /*! Thread idle timeout in seconds */
50 /*! Maxumum number of threads in the threadpool */
53 /*! Nonzero to disable switching from UDP to TCP transport */
54 unsigned int disable_tcp_switch;
55 /*!
56 * Although early media is enabled in pjproject by default, it's only
57 * enabled when the To tags are different. These options allow turning
58 * on or off the feature for different tags and same tags.
59 */
62 /*! Disable the use of rport in outgoing requests */
63 unsigned int disable_rport;
64};
65
68};
69
71{
73}
74
76
77static void *system_alloc(const char *name)
78{
79 struct system_config *system = ast_sorcery_generic_alloc(sizeof(*system), NULL);
80
81 if (!system) {
82 return NULL;
83 }
84
85 return system;
86}
87
88static int system_apply(const struct ast_sorcery *sorcery, void *obj)
89{
90 struct system_config *system = obj;
91 int min_timerb;
92
93 if (system->timert1 < TIMER_T1_MIN) {
94 ast_log(LOG_WARNING, "Timer T1 setting is too low. Setting to %d\n", TIMER_T1_MIN);
95 system->timert1 = TIMER_T1_MIN;
96 }
97
98 min_timerb = 64 * system->timert1;
99
100 if (system->timerb < min_timerb) {
101 ast_log(LOG_WARNING, "Timer B setting is too low. Setting to %d\n", min_timerb);
102 system->timerb = min_timerb;
103 }
104
105 pjsip_cfg()->tsx.t1 = system->timert1;
106 pjsip_cfg()->tsx.td = system->timerb;
107
108 pjsip_cfg()->endpt.follow_early_media_fork = system->follow_early_media_fork;
109#ifdef HAVE_PJSIP_INV_ACCEPT_MULTIPLE_SDP_ANSWERS
110 pjsip_cfg()->endpt.accept_multiple_sdp_answers = system->accept_multiple_sdp_answers;
111#else
112 if (system->accept_multiple_sdp_answers) {
114 "The accept_multiple_sdp_answers flag is not supported in this version of pjproject. Ignoring\n");
115 }
116#endif
117
118 if (system->compactheaders) {
119#ifdef HAVE_PJSIP_ENDPOINT_COMPACT_FORM
120 pjsip_cfg()->endpt.use_compact_form = PJ_TRUE;
121#else
122 extern pj_bool_t pjsip_use_compact_form;
123
124 pjsip_use_compact_form = PJ_TRUE;
125#endif
126 }
127
132
133 pjsip_cfg()->endpt.disable_tcp_switch =
134 system->disable_tcp_switch ? PJ_TRUE : PJ_FALSE;
135
136 pjsip_cfg()->endpt.disable_rport = system->disable_rport ? PJ_TRUE : PJ_FALSE;
137
138 return 0;
139}
140
141static struct system_config *get_system_cfg(void)
142{
143 struct system_config *cfg;
144 struct ao2_container *systems;
147
148 if (!systems) {
149 return NULL;
150 }
151
152 cfg = ao2_find(systems, NULL, 0);
153 ao2_ref(systems, -1);
154 return cfg;
155}
156
158{
159 struct system_config *cfg = get_system_cfg();
160
161 if (!cfg) {
162 cfg = ast_sorcery_alloc(system_sorcery, "system", NULL);
163 if (!cfg) {
164 return -1;
165 }
166 }
167
168 ast_str_append(&context->output_buffer, 0, "\nSystem Settings:\n\n");
170
171 ao2_ref(cfg, -1);
172 return 0;
173}
174
176{
177 RAII_VAR(struct ao2_container *, system_configs, NULL, ao2_cleanup);
178 RAII_VAR(struct system_config *, system, NULL, ao2_cleanup);
179
181 if (!system_sorcery) {
182 ast_log(LOG_ERROR, "Failed to open SIP system sorcery\n");
183 return -1;
184 }
185
186 ast_sorcery_apply_default(system_sorcery, "system", "config", "pjsip.conf,criteria=type=system,single_object=yes,explicit_name=system");
187
189 ast_log(LOG_ERROR, "Failed to register with sorcery (is res_sorcery_config loaded?)\n");
192 return -1;
193 }
194
195 ast_sorcery_object_field_register(system_sorcery, "system", "type", "", OPT_NOOP_T, 0, 0);
200 ast_sorcery_object_field_register(system_sorcery, "system", "compact_headers", "no",
202 ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_initial_size", "0",
203 OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.initial_size));
204 ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_auto_increment", "5",
205 OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.auto_increment));
206 ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_idle_timeout", "60",
207 OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.idle_timeout));
208 ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_max_size", "50",
209 OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.max_size));
210 ast_sorcery_object_field_register(system_sorcery, "system", "disable_tcp_switch", "yes",
212 ast_sorcery_object_field_register(system_sorcery, "system", "follow_early_media_fork", "yes",
214 ast_sorcery_object_field_register(system_sorcery, "system", "accept_multiple_sdp_answers", "no",
216 ast_sorcery_object_field_register(system_sorcery, "system", "disable_rport", "no",
218
220
221 system_configs = ast_sorcery_retrieve_by_fields(system_sorcery, "system",
223
224 if (ao2_container_count(system_configs)) {
225 return 0;
226 }
227
228 /* No config present, allocate one and apply defaults */
229 system = ast_sorcery_alloc(system_sorcery, "system", NULL);
230 if (!system) {
231 ast_log(LOG_ERROR, "Unable to allocate default system config.\n");
233 return -1;
234 }
235
236 if (system_apply(system_sorcery, system)) {
237 ast_log(LOG_ERROR, "Failed to apply default system config.\n");
239 return -1;
240 }
241
242 return 0;
243}
244
246{
248}
249
251{
252 struct ao2_container *discovered_nameservers;
253 struct ao2_iterator it_nameservers;
254 char *nameserver;
255 pj_status_t status;
256 pj_dns_resolver *resolver;
257 pj_str_t nameservers[PJ_DNS_RESOLVER_MAX_NS];
258 unsigned int count = 0;
259
260 discovered_nameservers = ast_dns_get_nameservers();
261 if (!discovered_nameservers) {
262 ast_log(LOG_ERROR, "Could not retrieve local system nameservers, resorting to system resolution\n");
263 return 0;
264 }
265
266 if (!ao2_container_count(discovered_nameservers)) {
267 ast_log(LOG_ERROR, "There are no local system nameservers configured, resorting to system resolution\n");
268 ao2_ref(discovered_nameservers, -1);
269 return -1;
270 }
271
272 if (!(resolver = pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint()))) {
273 status = pjsip_endpt_create_resolver(ast_sip_get_pjsip_endpoint(), &resolver);
274 if (status != PJ_SUCCESS) {
275 ast_log(LOG_ERROR, "Could not create DNS resolver(%d), resorting to system resolution\n", status);
276 ao2_ref(discovered_nameservers, -1);
277 return 0;
278 }
279 }
280
281 it_nameservers = ao2_iterator_init(discovered_nameservers, 0);
282 while ((nameserver = ao2_iterator_next(&it_nameservers))) {
283 pj_strset2(&nameservers[count++], nameserver);
284 ao2_ref(nameserver, -1);
285
286 if (count == (PJ_DNS_RESOLVER_MAX_NS - 1)) {
287 break;
288 }
289 }
290 ao2_iterator_destroy(&it_nameservers);
291
292 status = pj_dns_resolver_set_ns(resolver, count, nameservers, NULL);
293
294 /* Since we no longer need the nameservers we can drop the list of them */
295 ao2_ref(discovered_nameservers, -1);
296
297 if (status != PJ_SUCCESS) {
298 ast_log(LOG_ERROR, "Could not set nameservers on DNS resolver in PJSIP(%d), resorting to system resolution\n",
299 status);
300 return 0;
301 }
302
303 if (!pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint())) {
304 status = pjsip_endpt_set_resolver(ast_sip_get_pjsip_endpoint(), resolver);
305 if (status != PJ_SUCCESS) {
306 ast_log(LOG_ERROR, "Could not set DNS resolver in PJSIP(%d), resorting to system resolution\n", status);
307 return 0;
308 }
309 }
310
311 return 0;
312}
313
315{
317}
jack_status_t status
Definition: app_jack.c:146
Asterisk main include file. File version handling, generic pbx functions.
#define __stringify(x)
Definition: asterisk.h:216
#define ast_log
Definition: astobj2.c:42
#define ao2_iterator_next(iter)
Definition: astobj2.h:1911
int ao2_container_count(struct ao2_container *c)
Returns the number of elements in a container.
#define ao2_cleanup(obj)
Definition: astobj2.h:1934
#define ao2_find(container, arg, flags)
Definition: astobj2.h:1736
struct ao2_iterator ao2_iterator_init(struct ao2_container *c, int flags) attribute_warn_unused_result
Create an iterator for a container.
#define ao2_ref(o, delta)
Reference/unreference an object and return the old refcount.
Definition: astobj2.h:459
void ao2_iterator_destroy(struct ao2_iterator *iter)
Destroy a container iterator.
#define FLDSET(type,...)
Convert a struct and list of fields to an argument list of field offsets.
@ OPT_UINT_T
Type for default option handler for unsigned integers.
@ OPT_NOOP_T
Type for a default handler that should do nothing.
@ OPT_BOOL_T
Type for default option handler for bools (ast_true/ast_false)
static int system_apply(const struct ast_sorcery *sorcery, void *obj)
Definition: config_system.c:88
#define DEFAULT_TIMER_B
Definition: config_system.c:33
#define DEFAULT_TIMER_T1
Definition: config_system.c:32
void ast_sip_destroy_system(void)
static struct ast_threadpool_options sip_threadpool_options
Definition: config_system.c:66
static struct system_config * get_system_cfg(void)
#define TIMER_T1_MIN
Definition: config_system.c:31
static int system_create_resolver_and_set_nameservers(void *data)
static struct ast_sorcery * system_sorcery
Definition: config_system.c:75
int sip_cli_print_system(struct ast_sip_cli_context *context)
int ast_sip_initialize_system(void)
static void * system_alloc(const char *name)
Definition: config_system.c:77
void ast_sip_initialize_dns(void)
void sip_get_threadpool_options(struct ast_threadpool_options *threadpool_options)
Definition: config_system.c:70
DNS support for Asterisk.
struct ao2_container * ast_dns_get_nameservers(void)
Retrieve the configured nameservers of the system.
Definition: dns.c:581
static const char name[]
Definition: format_mp3.c:68
int ast_sip_push_task_wait_servant(struct ast_taskprocessor *serializer, int(*sip_task)(void *), void *task_data)
Push a task to SIP servants and wait for it to complete.
Definition: res_pjsip.c:2165
#define LOG_ERROR
#define LOG_WARNING
pjsip_endpoint * ast_sip_get_pjsip_endpoint(void)
Get a pointer to the PJSIP endpoint.
Definition: res_pjsip.c:520
int ast_sip_cli_print_sorcery_objectset(void *obj, void *arg, int flags)
Prints a sorcery object's ast_variable list.
Definition: pjsip_cli.c:36
static struct ast_sorcery * sorcery
#define NULL
Definition: resample.c:96
static struct ast_threadpool * threadpool
Thread pool for observers.
Definition: sorcery.c:86
Sorcery Data Access Layer API.
#define ast_sorcery_unref(sorcery)
Decrease the reference count of a sorcery structure.
Definition: sorcery.h:1500
@ AST_RETRIEVE_FLAG_MULTIPLE
Return all matching objects.
Definition: sorcery.h:120
@ AST_RETRIEVE_FLAG_ALL
Perform no matching, return all objects.
Definition: sorcery.h:123
void ast_sorcery_load(const struct ast_sorcery *sorcery)
Inform any wizards to load persistent objects.
Definition: sorcery.c:1377
void * ast_sorcery_generic_alloc(size_t size, ao2_destructor_fn destructor)
Allocate a generic sorcery capable object.
Definition: sorcery.c:1728
#define ast_sorcery_object_register_no_reload(sorcery, type, alloc, transform, apply)
Register an object type that is not reloadable.
Definition: sorcery.h:852
#define ast_sorcery_object_field_register(sorcery, type, name, default_val, opt_type, flags,...)
Register a field within an object.
Definition: sorcery.h:955
void * ast_sorcery_alloc(const struct ast_sorcery *sorcery, const char *type, const char *id)
Allocate an object.
Definition: sorcery.c:1744
#define ast_sorcery_apply_default(sorcery, type, name, data)
Definition: sorcery.h:476
#define ast_sorcery_open()
Open a new sorcery structure.
Definition: sorcery.h:406
void * ast_sorcery_retrieve_by_fields(const struct ast_sorcery *sorcery, const char *type, unsigned int flags, struct ast_variable *fields)
Retrieve an object or multiple objects using specific fields.
Definition: sorcery.c:1897
static struct aco_type * threadpool_options[]
Definition: stasis.c:2210
int ast_str_append(struct ast_str **buf, ssize_t max_len, const char *fmt,...)
Append to a thread local dynamic string.
Definition: strings.h:1139
Generic container type.
When we need to walk through a container, we use an ao2_iterator to keep track of the current positio...
Definition: astobj2.h:1821
CLI Formatter Context passed to all formatters.
Definition: res_pjsip_cli.h:34
Full structure for sorcery.
Definition: sorcery.c:230
int idle_timeout
Time limit in seconds for idle threads.
Definition: threadpool.h:79
int max_size
Maximum number of threads a pool may have.
Definition: threadpool.h:110
int auto_increment
Number of threads to increment pool by.
Definition: threadpool.h:90
int initial_size
Number of threads the pool will start with.
Definition: threadpool.h:100
unsigned int timert1
Definition: config_system.c:38
SORCERY_OBJECT(details)
unsigned int compactheaders
Definition: config_system.c:42
struct system_config::@452 threadpool
unsigned int timerb
Definition: config_system.c:40
unsigned int disable_rport
Definition: config_system.c:63
unsigned int disable_tcp_switch
Definition: config_system.c:54
unsigned int follow_early_media_fork
Definition: config_system.c:60
unsigned int accept_multiple_sdp_answers
Definition: config_system.c:61
#define AST_THREADPOOL_OPTIONS_VERSION
Definition: threadpool.h:71
#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:941