2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2006, Digium, Inc.
6 * Mark Spencer <markster@digium.com>
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.
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.
21 * \brief Implementation of Session Initiation Protocol
23 * \author Mark Spencer <markster@digium.com>
26 * \arg \ref AstCREDITS
28 * Implementation of RFC 3261 - without S/MIME, TCP and TLS support
29 * Configuration file \link Config_sip sip.conf \endlink
34 * \todo Better support of forking
36 * \ingroup channel_drivers
45 #include <sys/socket.h>
46 #include <sys/ioctl.h>
53 #include <sys/signal.h>
54 #include <netinet/in.h>
55 #include <netinet/in_systm.h>
56 #include <arpa/inet.h>
57 #include <netinet/ip.h>
62 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
64 #include "asterisk/lock.h"
65 #include "asterisk/channel.h"
66 #include "asterisk/config.h"
67 #include "asterisk/logger.h"
68 #include "asterisk/module.h"
69 #include "asterisk/pbx.h"
70 #include "asterisk/options.h"
71 #include "asterisk/lock.h"
72 #include "asterisk/sched.h"
73 #include "asterisk/io.h"
74 #include "asterisk/rtp.h"
75 #include "asterisk/acl.h"
76 #include "asterisk/manager.h"
77 #include "asterisk/callerid.h"
78 #include "asterisk/cli.h"
79 #include "asterisk/app.h"
80 #include "asterisk/musiconhold.h"
81 #include "asterisk/dsp.h"
82 #include "asterisk/features.h"
83 #include "asterisk/acl.h"
84 #include "asterisk/srv.h"
85 #include "asterisk/astdb.h"
86 #include "asterisk/causes.h"
87 #include "asterisk/utils.h"
88 #include "asterisk/file.h"
89 #include "asterisk/astobj.h"
90 #include "asterisk/dnsmgr.h"
91 #include "asterisk/devicestate.h"
92 #include "asterisk/linkedlists.h"
93 #include "asterisk/stringfields.h"
94 #include "asterisk/monitor.h"
97 #include "asterisk/astosp.h"
109 #define VIDEO_CODEC_MASK 0x1fc0000 /*!< Video codecs from H.261 thru AST_FORMAT_MAX_VIDEO */
110 #ifndef IPTOS_MINCOST
111 #define IPTOS_MINCOST 0x02
114 /* #define VOCAL_DATA_HACK */
116 #define DEFAULT_DEFAULT_EXPIRY 120
117 #define DEFAULT_MIN_EXPIRY 60
118 #define DEFAULT_MAX_EXPIRY 3600
119 #define DEFAULT_REGISTRATION_TIMEOUT 20
120 #define DEFAULT_MAX_FORWARDS "70"
122 /* guard limit must be larger than guard secs */
123 /* guard min must be < 1000, and should be >= 250 */
124 #define EXPIRY_GUARD_SECS 15 /*!< How long before expiry do we reregister */
125 #define EXPIRY_GUARD_LIMIT 30 /*!< Below here, we use EXPIRY_GUARD_PCT instead of
127 #define EXPIRY_GUARD_MIN 500 /*!< This is the minimum guard time applied. If
128 GUARD_PCT turns out to be lower than this, it
129 will use this time instead.
130 This is in milliseconds. */
131 #define EXPIRY_GUARD_PCT 0.20 /*!< Percentage of expires timeout to use when
132 below EXPIRY_GUARD_LIMIT */
133 #define DEFAULT_EXPIRY 900 /*!< Expire slowly */
135 static int min_expiry = DEFAULT_MIN_EXPIRY; /*!< Minimum accepted registration time */
136 static int max_expiry = DEFAULT_MAX_EXPIRY; /*!< Maximum accepted registration time */
137 static int default_expiry = DEFAULT_DEFAULT_EXPIRY;
138 static int expiry = DEFAULT_EXPIRY;
141 #define MAX(a,b) ((a) > (b) ? (a) : (b))
144 #define CALLERID_UNKNOWN "Unknown"
146 #define DEFAULT_MAXMS 2000 /*!< Qualification: Must be faster than 2 seconds by default */
147 #define DEFAULT_FREQ_OK 60 * 1000 /*!< Qualification: How often to check for the host to be up */
148 #define DEFAULT_FREQ_NOTOK 10 * 1000 /*!< Qualification: How often to check, if the host is down... */
150 #define DEFAULT_RETRANS 1000 /*!< How frequently to retransmit Default: 2 * 500 ms in RFC 3261 */
151 #define MAX_RETRANS 6 /*!< Try only 6 times for retransmissions, a total of 7 transmissions */
152 #define MAX_AUTHTRIES 3 /*!< Try authentication three times, then fail */
154 #define SIP_MAX_HEADERS 64 /*!< Max amount of SIP headers to read */
155 #define SIP_MAX_LINES 64 /*!< Max amount of lines in SIP attachment (like SDP) */
156 #define SIP_MAX_PACKET 4096 /*!< Also from RFC 3261 (2543), should sub headers tho */
159 static const char desc[] = "Session Initiation Protocol (SIP)";
160 static const char config[] = "sip.conf";
161 static const char notify_config[] = "sip_notify.conf";
162 static int usecnt = 0;
168 /* Do _NOT_ make any changes to this enum, or the array following it;
169 if you think you are doing the right thing, you are probably
170 not doing the right thing. If you think there are changes
171 needed, get someone else to review them first _before_
172 submitting a patch. If these two lists do not match properly
173 bad things will happen.
177 XMIT_CRITICAL = 2, /*!< Transmit critical SIP message reliably, with re-transmits.
178 If it fails, it's critical and will cause a teardown of the session */
179 XMIT_RELIABLE = 1, /*!< Transmit SIP message reliably, with re-transmits */
180 XMIT_UNRELIABLE = 0, /*!< Transmit SIP message without bothering with re-transmits */
183 enum subscriptiontype {
193 static const struct cfsubscription_types {
194 enum subscriptiontype type;
195 const char * const event;
196 const char * const mediatype;
197 const char * const text;
198 } subscription_types[] = {
199 { NONE, "-", "unknown", "unknown" },
200 /* IETF draft: draft-ietf-sipping-dialog-package-05.txt */
201 { DIALOG_INFO_XML, "dialog", "application/dialog-info+xml", "dialog-info+xml" },
202 { CPIM_PIDF_XML, "presence", "application/cpim-pidf+xml", "cpim-pidf+xml" }, /* RFC 3863 */
203 { PIDF_XML, "presence", "application/pidf+xml", "pidf+xml" }, /* RFC 3863 */
204 { XPIDF_XML, "presence", "application/xpidf+xml", "xpidf+xml" }, /* Pre-RFC 3863 with MS additions */
205 { MWI_NOTIFICATION, "message-summary", "application/simple-message-summary", "mwi" } /* Mailbox notification */
232 /* States for outbound registrations (with register= lines in sip.conf */
233 enum sipregistrystate {
234 REG_STATE_UNREGISTERED = 0, /*!< We are not registred */
235 REG_STATE_REGSENT, /*!< Registration request sent */
236 REG_STATE_AUTHSENT, /*!< We have tried to authenticate */
237 REG_STATE_REGISTERED, /*!< Registred and done */
238 REG_STATE_REJECTED, /*!< Registration rejected */
239 REG_STATE_TIMEOUT, /*!< Registration timed out */
240 REG_STATE_NOAUTH, /*!< We have no accepted credentials */
241 REG_STATE_FAILED, /*!< Registration failed after several tries */
245 /*! XXX Note that sip_methods[i].id == i must hold or the code breaks */
246 static const struct cfsip_methods {
248 int need_rtp; /*!< when this is the 'primary' use for a pvt structure, does it need RTP? */
251 { SIP_UNKNOWN, RTP, "-UNKNOWN-" },
252 { SIP_RESPONSE, NO_RTP, "SIP/2.0" },
253 { SIP_REGISTER, NO_RTP, "REGISTER" },
254 { SIP_OPTIONS, NO_RTP, "OPTIONS" },
255 { SIP_NOTIFY, NO_RTP, "NOTIFY" },
256 { SIP_INVITE, RTP, "INVITE" },
257 { SIP_ACK, NO_RTP, "ACK" },
258 { SIP_PRACK, NO_RTP, "PRACK" },
259 { SIP_BYE, NO_RTP, "BYE" },
260 { SIP_REFER, NO_RTP, "REFER" },
261 { SIP_SUBSCRIBE, NO_RTP, "SUBSCRIBE" },
262 { SIP_MESSAGE, NO_RTP, "MESSAGE" },
263 { SIP_UPDATE, NO_RTP, "UPDATE" },
264 { SIP_INFO, NO_RTP, "INFO" },
265 { SIP_CANCEL, NO_RTP, "CANCEL" },
266 { SIP_PUBLISH, NO_RTP, "PUBLISH" }
269 /*! \brief Structure for conversion between compressed SIP and "normal" SIP */
270 static const struct cfalias {
271 char * const fullname;
272 char * const shortname;
274 { "Content-Type", "c" },
275 { "Content-Encoding", "e" },
279 { "Content-Length", "l" },
282 { "Supported", "k" },
284 { "Referred-By", "b" },
285 { "Allow-Events", "u" },
288 { "Accept-Contact", "a" },
289 { "Reject-Contact", "j" },
290 { "Request-Disposition", "d" },
291 { "Session-Expires", "x" },
294 /*! Define SIP option tags, used in Require: and Supported: headers
295 We need to be aware of these properties in the phones to use
296 the replace: header. We should not do that without knowing
297 that the other end supports it...
298 This is nothing we can configure, we learn by the dialog
299 Supported: header on the REGISTER (peer) or the INVITE
301 We are not using many of these today, but will in the future.
302 This is documented in RFC 3261
305 #define NOT_SUPPORTED 0
307 #define SIP_OPT_REPLACES (1 << 0)
308 #define SIP_OPT_100REL (1 << 1)
309 #define SIP_OPT_TIMER (1 << 2)
310 #define SIP_OPT_EARLY_SESSION (1 << 3)
311 #define SIP_OPT_JOIN (1 << 4)
312 #define SIP_OPT_PATH (1 << 5)
313 #define SIP_OPT_PREF (1 << 6)
314 #define SIP_OPT_PRECONDITION (1 << 7)
315 #define SIP_OPT_PRIVACY (1 << 8)
316 #define SIP_OPT_SDP_ANAT (1 << 9)
317 #define SIP_OPT_SEC_AGREE (1 << 10)
318 #define SIP_OPT_EVENTLIST (1 << 11)
319 #define SIP_OPT_GRUU (1 << 12)
320 #define SIP_OPT_TARGET_DIALOG (1 << 13)
322 /*! \brief List of well-known SIP options. If we get this in a require,
323 we should check the list and answer accordingly. */
324 static const struct cfsip_options {
325 int id; /*!< Bitmap ID */
326 int supported; /*!< Supported by Asterisk ? */
327 char * const text; /*!< Text id, as in standard */
329 /* Replaces: header for transfer */
330 { SIP_OPT_REPLACES, SUPPORTED, "replaces" },
331 /* RFC3262: PRACK 100% reliability */
332 { SIP_OPT_100REL, NOT_SUPPORTED, "100rel" },
333 /* SIP Session Timers */
334 { SIP_OPT_TIMER, NOT_SUPPORTED, "timer" },
335 /* RFC3959: SIP Early session support */
336 { SIP_OPT_EARLY_SESSION, NOT_SUPPORTED, "early-session" },
337 /* SIP Join header support */
338 { SIP_OPT_JOIN, NOT_SUPPORTED, "join" },
339 /* RFC3327: Path support */
340 { SIP_OPT_PATH, NOT_SUPPORTED, "path" },
341 /* RFC3840: Callee preferences */
342 { SIP_OPT_PREF, NOT_SUPPORTED, "pref" },
343 /* RFC3312: Precondition support */
344 { SIP_OPT_PRECONDITION, NOT_SUPPORTED, "precondition" },
345 /* RFC3323: Privacy with proxies*/
346 { SIP_OPT_PRIVACY, NOT_SUPPORTED, "privacy" },
347 /* RFC4092: Usage of the SDP ANAT Semantics in the SIP */
348 { SIP_OPT_SDP_ANAT, NOT_SUPPORTED, "sdp-anat" },
349 /* RFC3329: Security agreement mechanism */
350 { SIP_OPT_SEC_AGREE, NOT_SUPPORTED, "sec_agree" },
351 /* SIMPLE events: draft-ietf-simple-event-list-07.txt */
352 { SIP_OPT_EVENTLIST, NOT_SUPPORTED, "eventlist" },
353 /* GRUU: Globally Routable User Agent URI's */
354 { SIP_OPT_GRUU, NOT_SUPPORTED, "gruu" },
355 /* Target-dialog: draft-ietf-sip-target-dialog-00.txt */
356 { SIP_OPT_TARGET_DIALOG,NOT_SUPPORTED, "target-dialog" },
360 /*! \brief SIP Methods we support */
361 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY"
363 /*! \brief SIP Extensions we support */
364 #define SUPPORTED_EXTENSIONS "replaces"
367 /* Default values, set and reset in reload_config before reading configuration */
368 /* These are default values in the source. There are other recommended values in the
369 sip.conf.sample for new installations. These may differ to keep backwards compatibility,
370 yet encouraging new behaviour on new installations
372 #define DEFAULT_SIP_PORT 5060 /*!< From RFC 3261 (former 2543) */
373 #define DEFAULT_CONTEXT "default"
374 #define DEFAULT_MUSICCLASS "default"
375 #define DEFAULT_VMEXTEN "asterisk"
376 #define DEFAULT_CALLERID "asterisk"
377 #define DEFAULT_NOTIFYMIME "application/simple-message-summary"
378 #define DEFAULT_MWITIME 10
379 #define DEFAULT_ALLOWGUEST TRUE
380 #define DEFAULT_SRVLOOKUP FALSE /*!< Recommended setting is ON */
381 #define DEFAULT_COMPACTHEADERS FALSE
382 #define DEFAULT_TOS_SIP 0 /*!< Call signalling packets should be marked as DSCP CS3, but the default is 0 to be compatible with previous versions. */
383 #define DEFAULT_TOS_AUDIO 0 /*!< Audio packets should be marked as DSCP EF (Expedited Forwarding), but the default is 0 to be compatible with previous versions. */
384 #define DEFAULT_TOS_VIDEO 0 /*!< Video packets should be marked as DSCP AF41, but the default is 0 to be compatible with previous versions. */
385 #define DEFAULT_ALLOW_EXT_DOM TRUE
386 #define DEFAULT_REALM "asterisk"
387 #define DEFAULT_NOTIFYRINGING TRUE
388 #define DEFAULT_PEDANTIC FALSE
389 #define DEFAULT_AUTOCREATEPEER FALSE
390 #define DEFAULT_QUALIFY FALSE
391 #define DEFAULT_T1MIN 100 /*!< 100 MS for minimal roundtrip time */
392 #define DEFAULT_MAX_CALL_BITRATE (384) /*!< Max bitrate for video */
393 #ifndef DEFAULT_USERAGENT
394 #define DEFAULT_USERAGENT "Asterisk PBX" /*!< Default Useragent: header unless re-defined in sip.conf */
398 /* Default setttings are used as a channel setting and as a default when
399 configuring devices */
400 static char default_context[AST_MAX_CONTEXT];
401 static char default_subscribecontext[AST_MAX_CONTEXT];
402 static char default_language[MAX_LANGUAGE];
403 static char default_callerid[AST_MAX_EXTENSION];
404 static char default_fromdomain[AST_MAX_EXTENSION];
405 static char default_notifymime[AST_MAX_EXTENSION];
406 static int default_qualify; /*!< Default Qualify= setting */
407 static char default_vmexten[AST_MAX_EXTENSION];
408 static char default_musicclass[MAX_MUSICCLASS]; /*!< Global music on hold class */
409 static int default_maxcallbitrate; /*!< Maximum bitrate for call */
410 static struct ast_codec_pref default_prefs; /*!< Default codec prefs */
412 /* Global settings only apply to the channel */
413 static int global_rtautoclear;
414 static int global_notifyringing; /*!< Send notifications on ringing */
415 static int srvlookup; /*!< SRV Lookup on or off. Default is off, RFC behavior is on */
416 static int pedanticsipchecking; /*!< Extra checking ? Default off */
417 static int autocreatepeer; /*!< Auto creation of peers at registration? Default off. */
418 static int global_relaxdtmf; /*!< Relax DTMF */
419 static int global_rtptimeout; /*!< Time out call if no RTP */
420 static int global_rtpholdtimeout;
421 static int global_rtpkeepalive; /*!< Send RTP keepalives */
422 static int global_reg_timeout;
423 static int global_regattempts_max; /*!< Registration attempts before giving up */
424 static int global_allowguest; /*!< allow unauthenticated users/peers to connect? */
425 static int global_allowsubscribe; /*!< Flag for disabling ALL subscriptions, this is FALSE only if all peers are FALSE
426 the global setting is in globals_flags[1] */
427 static int global_mwitime; /*!< Time between MWI checks for peers */
428 static int global_tos_sip; /*!< IP type of service for SIP packets */
429 static int global_tos_audio; /*!< IP type of service for audio RTP packets */
430 static int global_tos_video; /*!< IP type of service for video RTP packets */
431 static int compactheaders; /*!< send compact sip headers */
432 static int recordhistory; /*!< Record SIP history. Off by default */
433 static int dumphistory; /*!< Dump history to verbose before destroying SIP dialog */
434 static char global_realm[MAXHOSTNAMELEN]; /*!< Default realm */
435 static char global_regcontext[AST_MAX_CONTEXT]; /*!< Context for auto-extensions */
436 static char global_useragent[AST_MAX_EXTENSION]; /*!< Useragent for the SIP channel */
437 static int allow_external_domains; /*!< Accept calls to external SIP domains? */
438 static int global_callevents; /*!< Whether we send manager events or not */
439 static int global_t1min; /*!< T1 roundtrip time minimum */
441 /*! \brief Codecs that we support by default: */
442 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
443 static int noncodeccapability = AST_RTP_DTMF;
445 /* Object counters */
446 static int suserobjs = 0; /*!< Static users */
447 static int ruserobjs = 0; /*!< Realtime users */
448 static int speerobjs = 0; /*!< Statis peers */
449 static int rpeerobjs = 0; /*!< Realtime peers */
450 static int apeerobjs = 0; /*!< Autocreated peer objects */
451 static int regobjs = 0; /*!< Registry objects */
453 static struct ast_flags global_flags[2] = {{0}}; /*!< global SIP_ flags */
455 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
457 AST_MUTEX_DEFINE_STATIC(rand_lock); /*!< Lock for thread-safe random generator */
459 /*! \brief Protect the SIP dialog list (of sip_pvt's) */
460 AST_MUTEX_DEFINE_STATIC(iflock);
462 /*! \brief Protect the monitoring thread, so only one process can kill or start it, and not
463 when it's doing something critical. */
464 AST_MUTEX_DEFINE_STATIC(netlock);
466 AST_MUTEX_DEFINE_STATIC(monlock);
468 AST_MUTEX_DEFINE_STATIC(sip_reload_lock);
470 /*! \brief This is the thread for the monitor which checks for input on the channels
471 which are not currently in use. */
472 static pthread_t monitor_thread = AST_PTHREADT_NULL;
474 static int sip_reloading = FALSE; /*!< Flag for avoiding multiple reloads at the same time */
475 static enum channelreloadreason sip_reloadreason; /*!< Reason for last reload/load of configuration */
477 static struct sched_context *sched; /*!< The scheduling context */
478 static struct io_context *io; /*!< The IO context */
480 #define DEC_CALL_LIMIT 0
481 #define INC_CALL_LIMIT 1
484 /*! \brief sip_request: The data grabbed from the UDP socket */
486 char *rlPart1; /*!< SIP Method Name or "SIP/2.0" protocol version */
487 char *rlPart2; /*!< The Request URI or Response Status */
488 int len; /*!< Length */
489 int headers; /*!< # of SIP Headers */
490 int method; /*!< Method of this request */
491 char *header[SIP_MAX_HEADERS];
492 int lines; /*!< SDP Content */
493 char *line[SIP_MAX_LINES];
494 char data[SIP_MAX_PACKET];
495 int debug; /*!< Debug flag for this packet */
496 unsigned int flags; /*!< SIP_PKT Flags for this packet */
499 /*! \brief structure used in transfers */
501 struct ast_channel *chan1;
502 struct ast_channel *chan2;
503 struct sip_request req;
508 /*! \brief Parameters to the transmit_invite function */
509 struct sip_invite_param {
510 const char *distinctive_ring; /*!< Distinctive ring header */
511 const char *osptoken; /*!< OSP token for this call */
512 int addsipheaders; /*!< Add extra SIP headers */
513 const char *uri_options; /*!< URI options to add to the URI */
514 const char *vxml_url; /*!< VXML url for Cisco phones */
515 char *auth; /*!< Authentication */
516 char *authheader; /*!< Auth header */
517 enum sip_auth_type auth_type; /*!< Authentication type */
520 /*! \brief Structure to save routing information for a SIP session */
522 struct sip_route *next;
526 /*! \brief Modes for SIP domain handling in the PBX */
528 SIP_DOMAIN_AUTO, /*!< This domain is auto-configured */
529 SIP_DOMAIN_CONFIG, /*!< This domain is from configuration */
533 char domain[MAXHOSTNAMELEN]; /*!< SIP domain we are responsible for */
534 char context[AST_MAX_EXTENSION]; /*!< Incoming context for this domain */
535 enum domain_mode mode; /*!< How did we find this domain? */
536 AST_LIST_ENTRY(domain) list; /*!< List mechanics */
539 static AST_LIST_HEAD_STATIC(domain_list, domain); /*!< The SIP domain list */
542 /*! \brief sip_history: Structure for saving transactions within a SIP dialog */
544 AST_LIST_ENTRY(sip_history) list;
545 char event[0]; /* actually more, depending on needs */
548 AST_LIST_HEAD_NOLOCK(sip_history_head, sip_history); /*!< history list, entry in sip_pvt */
550 /*! \brief sip_auth: Creadentials for authentication to other SIP services */
552 char realm[AST_MAX_EXTENSION]; /*!< Realm in which these credentials are valid */
553 char username[256]; /*!< Username */
554 char secret[256]; /*!< Secret */
555 char md5secret[256]; /*!< MD5Secret */
556 struct sip_auth *next; /*!< Next auth structure in list */
559 /*--- Various flags for the flags field in the pvt structure
560 Peer only flags should be set in PAGE2 below
562 #define SIP_ALREADYGONE (1 << 0) /*!< Whether or not we've already been destroyed by our peer */
563 #define SIP_NEEDDESTROY (1 << 1) /*!< if we need to be destroyed */
564 #define SIP_NOVIDEO (1 << 2) /*!< Didn't get video in invite, don't offer */
565 #define SIP_RINGING (1 << 3) /*!< Have sent 180 ringing */
566 #define SIP_PROGRESS_SENT (1 << 4) /*!< Have sent 183 message progress */
567 #define SIP_NEEDREINVITE (1 << 5) /*!< Do we need to send another reinvite? */
568 #define SIP_PENDINGBYE (1 << 6) /*!< Need to send bye after we ack? */
569 #define SIP_GOTREFER (1 << 7) /*!< Got a refer? */
570 #define SIP_PROMISCREDIR (1 << 8) /*!< Promiscuous redirection */
571 #define SIP_TRUSTRPID (1 << 9) /*!< Trust RPID headers? */
572 #define SIP_USEREQPHONE (1 << 10) /*!< Add user=phone to numeric URI. Default off */
573 #define SIP_REALTIME (1 << 11) /*!< Flag for realtime users */
574 #define SIP_USECLIENTCODE (1 << 12) /*!< Trust X-ClientCode info message */
575 #define SIP_OUTGOING (1 << 13) /*!< Is this an outgoing call? */
576 #define SIP_FREEBIT (1 << 14) /*!< Free for session-related use */
577 #define SIP_FREEBIT3 (1 << 15) /*!< Free for session-related use */
578 #define SIP_DTMF (3 << 16) /*!< DTMF Support: four settings, uses two bits */
579 #define SIP_DTMF_RFC2833 (0 << 16) /*!< DTMF Support: RTP DTMF - "rfc2833" */
580 #define SIP_DTMF_INBAND (1 << 16) /*!< DTMF Support: Inband audio, only for ULAW/ALAW - "inband" */
581 #define SIP_DTMF_INFO (2 << 16) /*!< DTMF Support: SIP Info messages - "info" */
582 #define SIP_DTMF_AUTO (3 << 16) /*!< DTMF Support: AUTO switch between rfc2833 and in-band DTMF */
584 #define SIP_NAT (3 << 18) /*!< four settings, uses two bits */
585 #define SIP_NAT_NEVER (0 << 18) /*!< No nat support */
586 #define SIP_NAT_RFC3581 (1 << 18)
587 #define SIP_NAT_ROUTE (2 << 18)
588 #define SIP_NAT_ALWAYS (3 << 18)
589 /* re-INVITE related settings */
590 #define SIP_REINVITE (3 << 20) /*!< two bits used */
591 #define SIP_CAN_REINVITE (1 << 20) /*!< allow peers to be reinvited to send media directly p2p */
592 #define SIP_REINVITE_UPDATE (2 << 20) /*!< use UPDATE (RFC3311) when reinviting this peer */
593 /* "insecure" settings */
594 #define SIP_INSECURE_PORT (1 << 22) /*!< don't require matching port for incoming requests */
595 #define SIP_INSECURE_INVITE (1 << 23) /*!< don't require authentication for incoming INVITEs */
596 /* Sending PROGRESS in-band settings */
597 #define SIP_PROG_INBAND (3 << 24) /*!< three settings, uses two bits */
598 #define SIP_PROG_INBAND_NEVER (0 << 24)
599 #define SIP_PROG_INBAND_NO (1 << 24)
600 #define SIP_PROG_INBAND_YES (2 << 24)
601 /* Open Settlement Protocol authentication */
602 #define SIP_OSPAUTH (3 << 26) /*!< four settings, uses two bits */
603 #define SIP_OSPAUTH_NO (0 << 26)
604 #define SIP_OSPAUTH_GATEWAY (1 << 26)
605 #define SIP_OSPAUTH_PROXY (2 << 26)
606 #define SIP_OSPAUTH_EXCLUSIVE (3 << 26)
608 #define SIP_CALL_ONHOLD (1 << 28)
609 #define SIP_CALL_LIMIT (1 << 29)
610 /* Remote Party-ID Support */
611 #define SIP_SENDRPID (1 << 30)
612 /* Did this connection increment the counter of in-use calls? */
613 #define SIP_INC_COUNT (1 << 31)
615 #define SIP_FLAGS_TO_COPY \
616 (SIP_PROMISCREDIR | SIP_TRUSTRPID | SIP_SENDRPID | SIP_DTMF | SIP_REINVITE | \
617 SIP_PROG_INBAND | SIP_OSPAUTH | SIP_USECLIENTCODE | SIP_NAT | \
618 SIP_USEREQPHONE | SIP_INSECURE_PORT | SIP_INSECURE_INVITE)
620 /* a new page of flags for peers */
621 #define SIP_PAGE2_RTCACHEFRIENDS (1 << 0)
622 #define SIP_PAGE2_RTUPDATE (1 << 1)
623 #define SIP_PAGE2_RTAUTOCLEAR (1 << 2)
624 #define SIP_PAGE2_IGNOREREGEXPIRE (1 << 3)
625 #define SIP_PAGE2_RT_FROMCONTACT (1 << 4)
626 #define SIP_PAGE2_DEBUG (3 << 5)
627 #define SIP_PAGE2_DEBUG_CONFIG (1 << 5)
628 #define SIP_PAGE2_DEBUG_CONSOLE (1 << 6)
629 #define SIP_PAGE2_DYNAMIC (1 << 7) /*!< Dynamic Peers register with Asterisk */
630 #define SIP_PAGE2_SELFDESTRUCT (1 << 8) /*!< Automatic peers need to destruct themselves */
631 #define SIP_PAGE2_VIDEOSUPPORT (1 << 9)
632 #define SIP_PAGE2_ALLOWSUBSCRIBE (1 << 10) /*!< Allow subscriptions from this peer? */
633 #define SIP_PAGE2_ALLOWOVERLAP (1 << 11) /*!< Allow overlap dialing ? */
634 #define SIP_PAGE2_SUBSCRIBEMWIONLY (1 << 12) /*!< Only issue MWI notification if subscribed to */
637 #define SIP_PAGE2_FLAGS_TO_COPY \
638 (SIP_PAGE2_ALLOWSUBSCRIBE | SIP_PAGE2_ALLOWOVERLAP | SIP_PAGE2_VIDEOSUPPORT)
640 /* SIP packet flags */
641 #define SIP_PKT_DEBUG (1 << 0) /*!< Debug this packet */
642 #define SIP_PKT_WITH_TOTAG (1 << 1) /*!< This packet has a to-tag */
644 #define sipdebug ast_test_flag(&global_flags[1], SIP_PAGE2_DEBUG)
645 #define sipdebug_config ast_test_flag(&global_flags[1], SIP_PAGE2_DEBUG_CONFIG)
646 #define sipdebug_console ast_test_flag(&global_flags[1], SIP_PAGE2_DEBUG_CONSOLE)
648 /*! \brief sip_pvt: PVT structures are used for each SIP dialog, ie. a call, a registration, a subscribe */
649 static struct sip_pvt {
650 ast_mutex_t lock; /*!< Dialog private lock */
651 int method; /*!< SIP method that opened this dialog */
652 AST_DECLARE_STRING_FIELDS(
653 AST_STRING_FIELD(callid); /*!< Global CallID */
654 AST_STRING_FIELD(randdata); /*!< Random data */
655 AST_STRING_FIELD(accountcode); /*!< Account code */
656 AST_STRING_FIELD(realm); /*!< Authorization realm */
657 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
658 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
659 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
660 AST_STRING_FIELD(domain); /*!< Authorization domain */
661 AST_STRING_FIELD(refer_to); /*!< Place to store REFER-TO extension */
662 AST_STRING_FIELD(referred_by); /*!< Place to store REFERRED-BY extension */
663 AST_STRING_FIELD(refer_contact);/*!< Place to store Contact info from a REFER extension */
664 AST_STRING_FIELD(from); /*!< The From: header */
665 AST_STRING_FIELD(useragent); /*!< User agent in SIP request */
666 AST_STRING_FIELD(exten); /*!< Extension where to start */
667 AST_STRING_FIELD(context); /*!< Context for this call */
668 AST_STRING_FIELD(subscribecontext); /*!< Subscribecontext */
669 AST_STRING_FIELD(fromdomain); /*!< Domain to show in the from field */
670 AST_STRING_FIELD(fromuser); /*!< User to show in the user field */
671 AST_STRING_FIELD(fromname); /*!< Name to show in the user field */
672 AST_STRING_FIELD(tohost); /*!< Host we should put in the "to" field */
673 AST_STRING_FIELD(language); /*!< Default language for this call */
674 AST_STRING_FIELD(musicclass); /*!< Music on Hold class */
675 AST_STRING_FIELD(rdnis); /*!< Referring DNIS */
676 AST_STRING_FIELD(theirtag); /*!< Their tag */
677 AST_STRING_FIELD(username); /*!< [user] name */
678 AST_STRING_FIELD(peername); /*!< [peer] name, not set if [user] */
679 AST_STRING_FIELD(authname); /*!< Who we use for authentication */
680 AST_STRING_FIELD(uri); /*!< Original requested URI */
681 AST_STRING_FIELD(okcontacturi); /*!< URI from the 200 OK on INVITE */
682 AST_STRING_FIELD(peersecret); /*!< Password */
683 AST_STRING_FIELD(peermd5secret);
684 AST_STRING_FIELD(cid_num); /*!< Caller*ID */
685 AST_STRING_FIELD(cid_name); /*!< Caller*ID */
686 AST_STRING_FIELD(via); /*!< Via: header */
687 AST_STRING_FIELD(fullcontact); /*!< The Contact: that the UA registers with us */
688 AST_STRING_FIELD(our_contact); /*!< Our contact header */
689 AST_STRING_FIELD(rpid); /*!< Our RPID header */
690 AST_STRING_FIELD(rpid_from); /*!< Our RPID From header */
692 struct ast_codec_pref prefs; /*!< codec prefs */
693 unsigned int ocseq; /*!< Current outgoing seqno */
694 unsigned int icseq; /*!< Current incoming seqno */
695 ast_group_t callgroup; /*!< Call group */
696 ast_group_t pickupgroup; /*!< Pickup group */
697 int lastinvite; /*!< Last Cseq of invite */
698 struct ast_flags flags[2]; /*!< SIP_ flags */
699 int timer_t1; /*!< SIP timer T1, ms rtt */
700 unsigned int sipoptions; /*!< Supported SIP sipoptions on the other end */
701 int capability; /*!< Special capability (codec) */
702 int jointcapability; /*!< Supported capability at both ends (codecs ) */
703 int peercapability; /*!< Supported peer capability */
704 int prefcodec; /*!< Preferred codec (outbound only) */
705 int noncodeccapability;
706 int maxcallbitrate; /*!< Maximum Call Bitrate for Video Calls */
707 int callingpres; /*!< Calling presentation */
708 int authtries; /*!< Times we've tried to authenticate */
709 int expiry; /*!< How long we take to expire */
710 int branch; /*!< One random number */
711 char tag[11]; /*!< Another random number */
712 int sessionid; /*!< SDP Session ID */
713 int sessionversion; /*!< SDP Session Version */
714 struct sockaddr_in sa; /*!< Our peer */
715 struct sockaddr_in redirip; /*!< Where our RTP should be going if not to us */
716 struct sockaddr_in vredirip; /*!< Where our Video RTP should be going if not to us */
717 int redircodecs; /*!< Redirect codecs */
718 struct sockaddr_in recv; /*!< Received as */
719 struct in_addr ourip; /*!< Our IP */
720 struct ast_channel *owner; /*!< Who owns us */
721 struct sip_pvt *refer_call; /*!< Call we are referring */
722 struct sip_route *route; /*!< Head of linked list of routing steps (fm Record-Route) */
723 int route_persistant; /*!< Is this the "real" route? */
724 struct sip_auth *peerauth; /*!< Realm authentication */
725 int noncecount; /*!< Nonce-count */
726 char lastmsg[256]; /*!< Last Message sent/received */
727 int amaflags; /*!< AMA Flags */
728 int pendinginvite; /*!< Any pending invite */
730 int osphandle; /*!< OSP Handle for call */
731 time_t ospstart; /*!< OSP Start time */
732 unsigned int osptimelimit; /*!< OSP call duration limit */
734 struct sip_request initreq; /*!< Initial request that opened the SIP dialog */
736 int maxtime; /*!< Max time for first response */
737 int initid; /*!< Auto-congest ID if appropriate */
738 int autokillid; /*!< Auto-kill ID */
739 time_t lastrtprx; /*!< Last RTP received */
740 time_t lastrtptx; /*!< Last RTP sent */
741 int rtptimeout; /*!< RTP timeout time */
742 int rtpholdtimeout; /*!< RTP timeout when on hold */
743 int rtpkeepalive; /*!< Send RTP packets for keepalive */
744 enum subscriptiontype subscribed; /*!< Is this dialog a subscription? */
746 int laststate; /*!< Last known extension state */
749 struct ast_dsp *vad; /*!< Voice Activation Detection dsp */
751 struct sip_peer *relatedpeer; /*!< If this dialog is related to a peer, which one
752 Used in peerpoke, mwi subscriptions */
753 struct sip_registry *registry; /*!< If this is a REGISTER dialog, to which registry */
754 struct ast_rtp *rtp; /*!< RTP Session */
755 struct ast_rtp *vrtp; /*!< Video RTP session */
756 struct sip_pkt *packets; /*!< Packets scheduled for re-transmission */
757 struct sip_history_head *history; /*!< History of this SIP dialog */
758 struct ast_variable *chanvars; /*!< Channel variables to set for call */
759 struct sip_pvt *next; /*!< Next dialog in chain */
760 struct sip_invite_param *options; /*!< Options for INVITE */
763 #define FLAG_RESPONSE (1 << 0)
764 #define FLAG_FATAL (1 << 1)
766 /*! \brief sip packet - read in sipsock_read(), transmitted in send_request() */
768 struct sip_pkt *next; /*!< Next packet */
769 int retrans; /*!< Retransmission number */
770 int method; /*!< SIP method for this packet */
771 int seqno; /*!< Sequence number */
772 unsigned int flags; /*!< non-zero if this is a response packet (e.g. 200 OK) */
773 struct sip_pvt *owner; /*!< Owner AST call */
774 int retransid; /*!< Retransmission ID */
775 int timer_a; /*!< SIP timer A, retransmission timer */
776 int timer_t1; /*!< SIP Timer T1, estimated RTT or 500 ms */
777 int packetlen; /*!< Length of packet */
781 /*! \brief Structure for SIP user data. User's place calls to us */
783 /* Users who can access various contexts */
784 ASTOBJ_COMPONENTS(struct sip_user);
785 char secret[80]; /*!< Password */
786 char md5secret[80]; /*!< Password in md5 */
787 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
788 char subscribecontext[AST_MAX_CONTEXT]; /* Default context for subscriptions */
789 char cid_num[80]; /*!< Caller ID num */
790 char cid_name[80]; /*!< Caller ID name */
791 char accountcode[AST_MAX_ACCOUNT_CODE]; /* Account code */
792 char language[MAX_LANGUAGE]; /*!< Default language for this user */
793 char musicclass[MAX_MUSICCLASS];/*!< Music on Hold class */
794 char useragent[256]; /*!< User agent in SIP request */
795 struct ast_codec_pref prefs; /*!< codec prefs */
796 ast_group_t callgroup; /*!< Call group */
797 ast_group_t pickupgroup; /*!< Pickup Group */
798 unsigned int sipoptions; /*!< Supported SIP options */
799 struct ast_flags flags[2]; /*!< SIP_ flags */
800 int amaflags; /*!< AMA flags for billing */
801 int callingpres; /*!< Calling id presentation */
802 int capability; /*!< Codec capability */
803 int inUse; /*!< Number of calls in use */
804 int call_limit; /*!< Limit of concurrent calls */
805 struct ast_ha *ha; /*!< ACL setting */
806 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
807 int maxcallbitrate; /*!< Maximum Bitrate for a video call */
810 /*! \brief Structure for SIP peer data, we place calls to peers if registered or fixed IP address (host) */
812 ASTOBJ_COMPONENTS(struct sip_peer); /*!< name, refcount, objflags, object pointers */
813 /*!< peer->name is the unique name of this object */
814 char secret[80]; /*!< Password */
815 char md5secret[80]; /*!< Password in MD5 */
816 struct sip_auth *auth; /*!< Realm authentication list */
817 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
818 char subscribecontext[AST_MAX_CONTEXT]; /*!< Default context for subscriptions */
819 char username[80]; /*!< Temporary username until registration */
820 char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
821 int amaflags; /*!< AMA Flags (for billing) */
822 char tohost[MAXHOSTNAMELEN]; /*!< If not dynamic, IP address */
823 char regexten[AST_MAX_EXTENSION]; /*!< Extension to register (if regcontext is used) */
824 char fromuser[80]; /*!< From: user when calling this peer */
825 char fromdomain[MAXHOSTNAMELEN]; /*!< From: domain when calling this peer */
826 char fullcontact[256]; /*!< Contact registered with us (not in sip.conf) */
827 char cid_num[80]; /*!< Caller ID num */
828 char cid_name[80]; /*!< Caller ID name */
829 int callingpres; /*!< Calling id presentation */
830 int inUse; /*!< Number of calls in use */
831 int call_limit; /*!< Limit of concurrent calls */
832 char vmexten[AST_MAX_EXTENSION]; /*!< Dialplan extension for MWI notify message*/
833 char mailbox[AST_MAX_EXTENSION]; /*!< Mailbox setting for MWI checks */
834 char language[MAX_LANGUAGE]; /*!< Default language for prompts */
835 char musicclass[MAX_MUSICCLASS];/*!< Music on Hold class */
836 char useragent[256]; /*!< User agent in SIP request (saved from registration) */
837 struct ast_codec_pref prefs; /*!< codec prefs */
839 time_t lastmsgcheck; /*!< Last time we checked for MWI */
840 unsigned int sipoptions; /*!< Supported SIP options */
841 struct ast_flags flags[2]; /*!< SIP_ flags */
842 int expire; /*!< When to expire this peer registration */
843 int capability; /*!< Codec capability */
844 int rtptimeout; /*!< RTP timeout */
845 int rtpholdtimeout; /*!< RTP Hold Timeout */
846 int rtpkeepalive; /*!< Send RTP packets for keepalive */
847 ast_group_t callgroup; /*!< Call group */
848 ast_group_t pickupgroup; /*!< Pickup group */
849 struct ast_dnsmgr_entry *dnsmgr;/*!< DNS refresh manager for peer */
850 struct sockaddr_in addr; /*!< IP address of peer */
851 int maxcallbitrate; /*!< Maximum Bitrate for a video call */
854 struct sip_pvt *call; /*!< Call pointer */
855 int pokeexpire; /*!< When to expire poke (qualify= checking) */
856 int lastms; /*!< How long last response took (in ms), or -1 for no response */
857 int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */
858 struct timeval ps; /*!< Ping send time */
860 struct sockaddr_in defaddr; /*!< Default IP address, used until registration */
861 struct ast_ha *ha; /*!< Access control list */
862 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
863 struct sip_pvt *mwipvt; /*!< Subscription for MWI */
869 /*! \brief Registrations with other SIP proxies */
870 struct sip_registry {
871 ASTOBJ_COMPONENTS_FULL(struct sip_registry,1,1);
872 AST_DECLARE_STRING_FIELDS(
873 AST_STRING_FIELD(callid); /*!< Global Call-ID */
874 AST_STRING_FIELD(realm); /*!< Authorization realm */
875 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
876 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
877 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
878 AST_STRING_FIELD(domain); /*!< Authorization domain */
879 AST_STRING_FIELD(username); /*!< Who we are registering as */
880 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
881 AST_STRING_FIELD(hostname); /*!< Domain or host we register to */
882 AST_STRING_FIELD(secret); /*!< Password in clear text */
883 AST_STRING_FIELD(md5secret); /*!< Password in md5 */
884 AST_STRING_FIELD(contact); /*!< Contact extension */
885 AST_STRING_FIELD(random);
887 int portno; /*!< Optional port override */
888 int expire; /*!< Sched ID of expiration */
889 int regattempts; /*!< Number of attempts (since the last success) */
890 int timeout; /*!< sched id of sip_reg_timeout */
891 int refresh; /*!< How often to refresh */
892 struct sip_pvt *call; /*!< create a sip_pvt structure for each outbound "registration dialog" in progress */
893 enum sipregistrystate regstate; /*!< Registration state (see above) */
894 int callid_valid; /*!< 0 means we haven't chosen callid for this registry yet. */
895 unsigned int ocseq; /*!< Sequence number we got to for REGISTERs for this registry */
896 struct sockaddr_in us; /*!< Who the server thinks we are */
897 int noncecount; /*!< Nonce-count */
898 char lastmsg[256]; /*!< Last Message sent/received */
901 /* --- Linked lists of various objects --------*/
903 /*! \brief The user list: Users and friends */
904 static struct ast_user_list {
905 ASTOBJ_CONTAINER_COMPONENTS(struct sip_user);
908 /*! \brief The peer list: Peers and Friends */
909 static struct ast_peer_list {
910 ASTOBJ_CONTAINER_COMPONENTS(struct sip_peer);
913 /*! \brief The register list: Other SIP proxys we register with and place calls to */
914 static struct ast_register_list {
915 ASTOBJ_CONTAINER_COMPONENTS(struct sip_registry);
919 /*! \todo Move the sip_auth list to AST_LIST */
920 static struct sip_auth *authl = NULL; /*!< Authentication list for realm authentication */
923 /* --- Sockets and networking --------------*/
924 static int sipsock = -1; /*!< Main socket for SIP network communication */
925 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
926 static struct sockaddr_in externip; /*!< External IP address if we are behind NAT */
927 static char externhost[MAXHOSTNAMELEN]; /*!< External host name (possibly with dynamic DNS and DHCP */
928 static time_t externexpire = 0; /*!< Expiration counter for re-resolving external host name in dynamic DNS */
929 static int externrefresh = 10;
930 static struct ast_ha *localaddr; /*!< List of local networks, on the same side of NAT as this Asterisk */
931 static struct in_addr __ourip;
932 static struct sockaddr_in outboundproxyip;
934 static struct sockaddr_in debugaddr;
936 struct ast_config *notify_types; /*!< The list of manual NOTIFY types we know how to send */
940 /*---------------------------- Forward declarations of functions in chan_sip.c */
941 static int transmit_response(struct sip_pvt *p, char *msg, struct sip_request *req);
942 static int transmit_response_with_sdp(struct sip_pvt *p, char *msg, struct sip_request *req, enum xmittype reliable);
943 static int transmit_response_with_unsupported(struct sip_pvt *p, char *msg, struct sip_request *req, char *unsupported);
944 static int transmit_response_with_auth(struct sip_pvt *p, const char *msg, struct sip_request *req, const char *rand, enum xmittype reliable, const char *header, int stale);
945 static int transmit_request(struct sip_pvt *p, int sipmethod, int inc, enum xmittype reliable, int newbranch);
946 static int transmit_request_with_auth(struct sip_pvt *p, int sipmethod, int inc, enum xmittype reliable, int newbranch);
947 static int transmit_invite(struct sip_pvt *p, int sipmethod, int sendsdp, int init);
948 static int transmit_reinvite_with_sdp(struct sip_pvt *p);
949 static int transmit_info_with_digit(struct sip_pvt *p, char digit);
950 static int transmit_info_with_vidupdate(struct sip_pvt *p);
951 static int transmit_message_with_text(struct sip_pvt *p, const char *text);
952 static int transmit_refer(struct sip_pvt *p, const char *dest);
953 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
954 static struct sip_peer *temp_peer(const char *name);
955 static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, int sipmethod, int init);
956 static void free_old_route(struct sip_route *route);
957 static int build_reply_digest(struct sip_pvt *p, int method, char *digest, int digest_len);
958 static int update_call_counter(struct sip_pvt *fup, int event);
959 static struct sip_peer *build_peer(const char *name, struct ast_variable *v, int realtime);
960 static struct sip_user *build_user(const char *name, struct ast_variable *v, int realtime);
961 static int sip_do_reload(enum channelreloadreason reason);
962 static int expire_register(void *data);
963 static struct ast_channel *sip_request_call(const char *type, int format, void *data, int *cause);
964 static int sip_devicestate(void *data);
965 static int sip_sendtext(struct ast_channel *ast, const char *text);
966 static int sip_call(struct ast_channel *ast, char *dest, int timeout);
967 static int sip_hangup(struct ast_channel *ast);
968 static int sip_answer(struct ast_channel *ast);
969 static struct ast_frame *sip_read(struct ast_channel *ast);
970 static int sip_write(struct ast_channel *ast, struct ast_frame *frame);
971 static int sip_indicate(struct ast_channel *ast, int condition);
972 static int sip_transfer(struct ast_channel *ast, const char *dest);
973 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
974 static int sip_senddigit(struct ast_channel *ast, char digit);
975 static int clear_realm_authentication(struct sip_auth *authlist); /* Clear realm authentication list (at reload) */
976 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, char *configuration, int lineno); /* Add realm authentication in list */
977 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, const char *realm); /* Find authentication for a specific realm */
978 static int check_auth(struct sip_pvt *p, struct sip_request *req, const char *username,
979 const char *secret, const char *md5secret, int sipmethod,
980 char *uri, enum xmittype reliable, int ignore);
981 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */
982 static void append_date(struct sip_request *req); /* Append date to SIP packet */
983 static int determine_firstline_parts(struct sip_request *req);
984 static void sip_dump_history(struct sip_pvt *dialog); /* Dump history to LOG_DEBUG at end of dialog, before destroying data */
985 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
986 static int transmit_state_notify(struct sip_pvt *p, int state, int full);
987 static char *gettag(struct sip_request *req, char *header, char *tagbuf, int tagbufsize);
988 static int find_sip_method(char *msg);
989 static unsigned int parse_sip_options(struct sip_pvt *pvt, char *supported);
990 static void sip_destroy(struct sip_pvt *p);
991 static void sip_destroy_peer(struct sip_peer *peer);
992 static void sip_destroy_user(struct sip_user *user);
993 static void parse_request(struct sip_request *req);
994 static char *get_header(struct sip_request *req, const char *name);
995 static void copy_request(struct sip_request *dst,struct sip_request *src);
996 static int transmit_response_reliable(struct sip_pvt *p, char *msg, struct sip_request *req);
997 static int transmit_register(struct sip_registry *r, int sipmethod, char *auth, char *authheader);
998 static int sip_poke_peer(struct sip_peer *peer);
999 static int __sip_do_register(struct sip_registry *r);
1000 static int restart_monitor(void);
1001 static void set_peer_defaults(struct sip_peer *peer);
1002 static struct sip_peer *temp_peer(const char *name);
1003 static int sip_send_mwi_to_peer(struct sip_peer *peer);
1004 static int sip_scheddestroy(struct sip_pvt *p, int ms);
1007 /*----- RTP interface functions */
1008 static int sip_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active);
1009 static struct ast_rtp *sip_get_rtp_peer(struct ast_channel *chan);
1010 static struct ast_rtp *sip_get_vrtp_peer(struct ast_channel *chan);
1011 static int sip_get_codec(struct ast_channel *chan);
1013 /*! \brief Definition of this channel for PBX channel registration */
1014 static const struct ast_channel_tech sip_tech = {
1016 .description = "Session Initiation Protocol (SIP)",
1017 .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
1018 .properties = AST_CHAN_TP_WANTSJITTER,
1019 .requester = sip_request_call,
1020 .devicestate = sip_devicestate,
1022 .hangup = sip_hangup,
1023 .answer = sip_answer,
1026 .write_video = sip_write,
1027 .indicate = sip_indicate,
1028 .transfer = sip_transfer,
1030 .send_digit = sip_senddigit,
1031 .bridge = ast_rtp_bridge,
1032 .send_text = sip_sendtext,
1035 /*! \brief Interface structure with callbacks used to connect to RTP module */
1036 static struct ast_rtp_protocol sip_rtp = {
1038 get_rtp_info: sip_get_rtp_peer,
1039 get_vrtp_info: sip_get_vrtp_peer,
1040 set_rtp_peer: sip_set_rtp_peer,
1041 get_codec: sip_get_codec,
1046 \brief Thread-safe random number generator
1047 \return a random number
1049 This function uses a mutex lock to guarantee that no
1050 two threads will receive the same random number.
1052 static force_inline int thread_safe_rand(void)
1056 ast_mutex_lock(&rand_lock);
1058 ast_mutex_unlock(&rand_lock);
1063 /*! \brief Find SIP method from header
1064 * Strictly speaking, SIP methods are case SENSITIVE, but we don't check
1065 * following Jon Postel's rule: Be gentle in what you accept, strict with what you send */
1066 static int find_sip_method(char *msg)
1070 if (ast_strlen_zero(msg))
1073 for (i = 1; (i < (sizeof(sip_methods) / sizeof(sip_methods[0]))) && !res; i++) {
1074 if (!strcasecmp(sip_methods[i].text, msg))
1075 res = sip_methods[i].id;
1080 /*! \brief Parse supported header in incoming packet */
1081 static unsigned int parse_sip_options(struct sip_pvt *pvt, char *supported)
1085 char *temp = ast_strdupa(supported);
1087 unsigned int profile = 0;
1089 if (ast_strlen_zero(supported) )
1092 if (option_debug > 2 && sipdebug)
1093 ast_log(LOG_DEBUG, "Begin: parsing SIP \"Supported: %s\"\n", supported);
1098 if ( (sep = strchr(next, ',')) != NULL) {
1102 while (*next == ' ') /* Skip spaces */
1104 if (option_debug > 2 && sipdebug)
1105 ast_log(LOG_DEBUG, "Found SIP option: -%s-\n", next);
1106 for (i=0; (i < (sizeof(sip_options) / sizeof(sip_options[0]))) && !res; i++) {
1107 if (!strcasecmp(next, sip_options[i].text)) {
1108 profile |= sip_options[i].id;
1110 if (option_debug > 2 && sipdebug)
1111 ast_log(LOG_DEBUG, "Matched SIP option: %s\n", next);
1115 if (option_debug > 2 && sipdebug)
1116 ast_log(LOG_DEBUG, "Found no match for SIP option: %s (Please file bug report!)\n", next);
1120 pvt->sipoptions = profile;
1122 ast_log(LOG_DEBUG, "* SIP extension value: %d for call %s\n", profile, pvt->callid);
1127 /*! \brief See if we pass debug IP filter */
1128 static inline int sip_debug_test_addr(struct sockaddr_in *addr)
1132 if (debugaddr.sin_addr.s_addr) {
1133 if (((ntohs(debugaddr.sin_port) != 0)
1134 && (debugaddr.sin_port != addr->sin_port))
1135 || (debugaddr.sin_addr.s_addr != addr->sin_addr.s_addr))
1141 /*! \brief Test PVT for debugging output */
1142 static inline int sip_debug_test_pvt(struct sip_pvt *p)
1146 return sip_debug_test_addr(ast_test_flag(&p->flags[0], SIP_NAT_ROUTE) ? &p->recv : &p->sa);
1150 /*! \brief Transmit SIP message */
1151 static int __sip_xmit(struct sip_pvt *p, char *data, int len)
1154 char iabuf[INET_ADDRSTRLEN];
1156 if (ast_test_flag(&p->flags[0], SIP_NAT_ROUTE))
1157 res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->recv, sizeof(struct sockaddr_in));
1159 res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->sa, sizeof(struct sockaddr_in));
1162 ast_log(LOG_WARNING, "sip_xmit of %p (len %d) to %s:%d returned %d: %s\n", data, len, ast_inet_ntoa(iabuf, sizeof(iabuf), p->sa.sin_addr), ntohs(p->sa.sin_port), res, strerror(errno));
1168 /*! \brief Build a Via header for a request */
1169 static void build_via(struct sip_pvt *p)
1171 char iabuf[INET_ADDRSTRLEN];
1172 /* Work around buggy UNIDEN UIP200 firmware */
1173 const char *rport = ast_test_flag(&p->flags[0], SIP_NAT) & SIP_NAT_RFC3581 ? ";rport" : "";
1175 /* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
1176 ast_string_field_build(p, via, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x%s",
1177 ast_inet_ntoa(iabuf, sizeof(iabuf), p->ourip), ourport, p->branch, rport);
1180 /*! \brief NAT fix - decide which IP address to use for ASterisk server?
1181 * Only used for outbound registrations */
1182 static int ast_sip_ouraddrfor(struct in_addr *them, struct in_addr *us)
1185 * Using the localaddr structure built up with localnet statements
1186 * apply it to their address to see if we need to substitute our
1187 * externip or can get away with our internal bindaddr
1189 struct sockaddr_in theirs;
1190 theirs.sin_addr = *them;
1192 if (localaddr && externip.sin_addr.s_addr &&
1193 ast_apply_ha(localaddr, &theirs)) {
1194 if (externexpire && (time(NULL) >= externexpire)) {
1195 struct ast_hostent ahp;
1198 time(&externexpire);
1199 externexpire += externrefresh;
1200 if ((hp = ast_gethostbyname(externhost, &ahp))) {
1201 memcpy(&externip.sin_addr, hp->h_addr, sizeof(externip.sin_addr));
1203 ast_log(LOG_NOTICE, "Warning: Re-lookup of '%s' failed!\n", externhost);
1205 memcpy(us, &externip.sin_addr, sizeof(struct in_addr));
1207 char iabuf[INET_ADDRSTRLEN];
1208 ast_inet_ntoa(iabuf, sizeof(iabuf), *(struct in_addr *)&them->s_addr);
1210 ast_log(LOG_DEBUG, "Target address %s is not local, substituting externip\n", iabuf);
1212 } else if (bindaddr.sin_addr.s_addr)
1213 memcpy(us, &bindaddr.sin_addr, sizeof(struct in_addr));
1215 return ast_ouraddrfor(them, us);
1219 /*! \brief Append to SIP dialog history
1220 \return Always returns 0 */
1221 #define append_history(p, event, fmt , args... ) append_history_full(p, "%-15s " fmt, event, ## args)
1223 static int append_history_full(struct sip_pvt *p, const char *fmt, ...)
1224 __attribute__ ((format (printf, 2, 3)));
1226 /*! \brief Append to SIP dialog history with arg list */
1227 static void append_history_va(struct sip_pvt *p, const char *fmt, va_list ap)
1229 char buf[80], *c = buf; /* max history length */
1230 struct sip_history *hist;
1233 vsnprintf(buf, sizeof(buf), fmt, ap);
1234 strsep(&c, "\r\n"); /* Trim up everything after \r or \n */
1235 l = strlen(buf) + 1;
1236 if (!(hist = ast_calloc(1, sizeof(*hist) + l)))
1238 if (!p->history && !(p->history = ast_calloc(1, sizeof(*p->history)))) {
1242 memcpy(hist->event, buf, l);
1243 AST_LIST_INSERT_TAIL(p->history, hist, list);
1246 /*! \brief Append to SIP dialog history with arg list */
1247 static int append_history_full(struct sip_pvt *p, const char *fmt, ...)
1251 if (!recordhistory || !p)
1254 append_history_va(p, fmt, ap);
1260 /*! \brief Retransmit SIP message if no answer */
1261 static int retrans_pkt(void *data)
1263 struct sip_pkt *pkt=data, *prev, *cur = NULL;
1264 char iabuf[INET_ADDRSTRLEN];
1265 int reschedule = DEFAULT_RETRANS;
1268 ast_mutex_lock(&pkt->owner->lock);
1270 if (pkt->retrans < MAX_RETRANS) {
1272 if (!pkt->timer_t1) { /* Re-schedule using timer_a and timer_t1 */
1273 if (sipdebug && option_debug > 3)
1274 ast_log(LOG_DEBUG, "SIP TIMER: Not rescheduling id #%d:%s (Method %d) (No timer T1)\n", pkt->retransid, sip_methods[pkt->method].text, pkt->method);
1278 if (sipdebug && option_debug > 3)
1279 ast_log(LOG_DEBUG, "SIP TIMER: Rescheduling retransmission #%d (%d) %s - %d\n", pkt->retransid, pkt->retrans, sip_methods[pkt->method].text, pkt->method);
1283 pkt->timer_a = 2 * pkt->timer_a;
1285 /* For non-invites, a maximum of 4 secs */
1286 siptimer_a = pkt->timer_t1 * pkt->timer_a; /* Double each time */
1287 if (pkt->method != SIP_INVITE && siptimer_a > 4000)
1290 /* Reschedule re-transmit */
1291 reschedule = siptimer_a;
1292 if (option_debug > 3)
1293 ast_log(LOG_DEBUG, "** SIP timers: Rescheduling retransmission %d to %d ms (t1 %d ms (Retrans id #%d)) \n", pkt->retrans +1, siptimer_a, pkt->timer_t1, pkt->retransid);
1296 if (pkt->owner && sip_debug_test_pvt(pkt->owner)) {
1297 if (ast_test_flag(&pkt->owner->flags[0], SIP_NAT_ROUTE))
1298 ast_verbose("Retransmitting #%d (NAT) to %s:%d:\n%s\n---\n", pkt->retrans, ast_inet_ntoa(iabuf, sizeof(iabuf), pkt->owner->recv.sin_addr), ntohs(pkt->owner->recv.sin_port), pkt->data);
1300 ast_verbose("Retransmitting #%d (no NAT) to %s:%d:\n%s\n---\n", pkt->retrans, ast_inet_ntoa(iabuf, sizeof(iabuf), pkt->owner->sa.sin_addr), ntohs(pkt->owner->sa.sin_port), pkt->data);
1303 append_history(pkt->owner, "ReTx", "%d %s", reschedule, pkt->data);
1304 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen);
1305 ast_mutex_unlock(&pkt->owner->lock);
1308 /* Too many retries */
1309 if (pkt->owner && pkt->method != SIP_OPTIONS) {
1310 if (ast_test_flag(pkt, FLAG_FATAL) || sipdebug) /* Tell us if it's critical or if we're debugging */
1311 ast_log(LOG_WARNING, "Maximum retries exceeded on transmission %s for seqno %d (%s %s)\n", pkt->owner->callid, pkt->seqno, (ast_test_flag(pkt, FLAG_FATAL)) ? "Critical" : "Non-critical", (ast_test_flag(pkt, FLAG_RESPONSE)) ? "Response" : "Request");
1313 if ((pkt->method == SIP_OPTIONS) && sipdebug)
1314 ast_log(LOG_WARNING, "Cancelling retransmit of OPTIONs (call id %s) \n", pkt->owner->callid);
1316 append_history(pkt->owner, "MaxRetries", "%s", (ast_test_flag(pkt, FLAG_FATAL)) ? "(Critical)" : "(Non-critical)");
1318 pkt->retransid = -1;
1320 if (ast_test_flag(pkt, FLAG_FATAL)) {
1321 while(pkt->owner->owner && ast_mutex_trylock(&pkt->owner->owner->lock)) {
1322 ast_mutex_unlock(&pkt->owner->lock);
1324 ast_mutex_lock(&pkt->owner->lock);
1326 if (pkt->owner->owner) {
1327 ast_set_flag(&pkt->owner->flags[0], SIP_ALREADYGONE);
1328 ast_log(LOG_WARNING, "Hanging up call %s - no reply to our critical packet.\n", pkt->owner->callid);
1329 ast_queue_hangup(pkt->owner->owner);
1330 ast_mutex_unlock(&pkt->owner->owner->lock);
1332 /* If no channel owner, destroy now */
1333 ast_set_flag(&pkt->owner->flags[0], SIP_NEEDDESTROY);
1336 /* In any case, go ahead and remove the packet */
1338 cur = pkt->owner->packets;
1347 prev->next = cur->next;
1349 pkt->owner->packets = cur->next;
1350 ast_mutex_unlock(&pkt->owner->lock);
1354 ast_log(LOG_WARNING, "Weird, couldn't find packet owner!\n");
1356 ast_mutex_unlock(&pkt->owner->lock);
1360 /*! \brief Transmit packet with retransmits
1361 \return 0 on success, -1 on failure to allocate packet
1363 static int __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, char *data, int len, int fatal, int sipmethod)
1365 struct sip_pkt *pkt;
1366 int siptimer_a = DEFAULT_RETRANS;
1368 if (!(pkt = ast_calloc(1, sizeof(*pkt) + len + 1)))
1370 memcpy(pkt->data, data, len);
1371 pkt->method = sipmethod;
1372 pkt->packetlen = len;
1373 pkt->next = p->packets;
1377 pkt->data[len] = '\0';
1378 pkt->timer_t1 = p->timer_t1; /* Set SIP timer T1 */
1380 ast_set_flag(pkt, FLAG_FATAL);
1383 siptimer_a = pkt->timer_t1 * 2;
1385 /* Schedule retransmission */
1386 pkt->retransid = ast_sched_add_variable(sched, siptimer_a, retrans_pkt, pkt, 1);
1387 if (option_debug > 3 && sipdebug)
1388 ast_log(LOG_DEBUG, "*** SIP TIMER: Initalizing retransmit timer on packet: Id #%d\n", pkt->retransid);
1389 pkt->next = p->packets;
1392 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen); /* Send packet */
1393 if (sipmethod == SIP_INVITE) {
1394 /* Note this is a pending invite */
1395 p->pendinginvite = seqno;
1400 /*! \brief Kill a SIP dialog (called by scheduler) */
1401 static int __sip_autodestruct(void *data)
1403 struct sip_pvt *p = data;
1405 /* If this is a subscription, tell the phone that we got a timeout */
1406 if (p->subscribed) {
1407 p->subscribed = TIMEOUT;
1408 transmit_state_notify(p, AST_EXTENSION_DEACTIVATED, 1); /* Send last notification */
1409 p->subscribed = NONE;
1410 append_history(p, "Subscribestatus", "timeout");
1411 if (option_debug > 2)
1412 ast_log(LOG_DEBUG, "Re-scheduled destruction of SIP subsription %s\n", p->callid ? p->callid : "<unknown>");
1413 return 10000; /* Reschedule this destruction so that we know that it's gone */
1416 /* Reset schedule ID */
1420 ast_log(LOG_DEBUG, "Auto destroying call '%s'\n", p->callid);
1421 append_history(p, "AutoDestroy", "");
1423 ast_log(LOG_WARNING, "Autodestruct on dialog '%s' with owner in place (Method: %s)\n", p->callid, sip_methods[p->method].text);
1424 ast_queue_hangup(p->owner);
1431 /*! \brief Schedule destruction of SIP call */
1432 static int sip_scheddestroy(struct sip_pvt *p, int ms)
1434 if (sip_debug_test_pvt(p))
1435 ast_verbose("Scheduling destruction of SIP dialog '%s' in %d ms (Method: %s)\n", p->callid, ms, sip_methods[p->method].text);
1437 append_history(p, "SchedDestroy", "%d ms", ms);
1439 if (p->autokillid > -1)
1440 ast_sched_del(sched, p->autokillid);
1441 p->autokillid = ast_sched_add(sched, ms, __sip_autodestruct, p);
1445 /*! \brief Cancel destruction of SIP dialog */
1446 static int sip_cancel_destroy(struct sip_pvt *p)
1448 if (p->autokillid > -1)
1449 ast_sched_del(sched, p->autokillid);
1450 append_history(p, "CancelDestroy", "");
1455 /*! \brief Acknowledges receipt of a packet and stops retransmission */
1456 static int __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
1458 struct sip_pkt *cur, *prev = NULL;
1461 /* Just in case... */
1464 msg = sip_methods[sipmethod].text;
1466 ast_mutex_lock(&p->lock);
1469 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1470 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1471 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1472 if (!resp && (seqno == p->pendinginvite)) {
1473 ast_log(LOG_DEBUG, "Acked pending invite %d\n", p->pendinginvite);
1474 p->pendinginvite = 0;
1476 /* this is our baby */
1478 prev->next = cur->next;
1480 p->packets = cur->next;
1481 if (cur->retransid > -1) {
1482 if (sipdebug && option_debug > 3)
1483 ast_log(LOG_DEBUG, "** SIP TIMER: Cancelling retransmit of packet (reply received) Retransid #%d\n", cur->retransid);
1484 ast_sched_del(sched, cur->retransid);
1493 ast_mutex_unlock(&p->lock);
1495 ast_log(LOG_DEBUG, "Stopping retransmission on '%s' of %s %d: Match %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
1499 /*! \brief Pretend to ack all packets */
1500 static int __sip_pretend_ack(struct sip_pvt *p)
1502 struct sip_pkt *cur=NULL;
1505 if (cur == p->packets) {
1506 ast_log(LOG_WARNING, "Have a packet that doesn't want to give up! %s\n", sip_methods[cur->method].text);
1511 __sip_ack(p, p->packets->seqno, (ast_test_flag(p->packets, FLAG_RESPONSE)), cur->method);
1512 else { /* Unknown packet type */
1516 ast_copy_string(method, p->packets->data, sizeof(method));
1517 c = ast_skip_blanks(method); /* XXX what ? */
1519 __sip_ack(p, p->packets->seqno, (ast_test_flag(p->packets, FLAG_RESPONSE)), find_sip_method(method));
1525 /*! \brief Acks receipt of packet, keep it around (used for provisional responses) */
1526 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
1528 struct sip_pkt *cur;
1530 char *msg = sip_methods[sipmethod].text;
1534 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1535 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1536 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1537 /* this is our baby */
1538 if (cur->retransid > -1) {
1539 if (option_debug > 3 && sipdebug)
1540 ast_log(LOG_DEBUG, "*** SIP TIMER: Cancelling retransmission #%d - %s (got response)\n", cur->retransid, msg);
1541 ast_sched_del(sched, cur->retransid);
1543 cur->retransid = -1;
1550 ast_log(LOG_DEBUG, "(Provisional) Stopping retransmission (but retaining packet) on '%s' %s %d: %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
1555 /*! \brief Copy SIP request, parse it */
1556 static void parse_copy(struct sip_request *dst, struct sip_request *src)
1558 memset(dst, 0, sizeof(*dst));
1559 memcpy(dst->data, src->data, sizeof(dst->data));
1560 dst->len = src->len;
1564 /*! \brief Transmit response on SIP request*/
1565 static int send_response(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno)
1569 if (sip_debug_test_pvt(p)) {
1570 char iabuf[INET_ADDRSTRLEN];
1571 if (ast_test_flag(&p->flags[0], SIP_NAT_ROUTE))
1572 ast_verbose("%sTransmitting (NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->recv.sin_addr), ntohs(p->recv.sin_port), req->data);
1574 ast_verbose("%sTransmitting (no NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->sa.sin_addr), ntohs(p->sa.sin_port), req->data);
1576 if (recordhistory) {
1577 struct sip_request tmp;
1578 parse_copy(&tmp, req);
1579 append_history(p, reliable ? "TxRespRel" : "TxResp", "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1582 __sip_reliable_xmit(p, seqno, 1, req->data, req->len, (reliable == XMIT_CRITICAL), req->method) :
1583 __sip_xmit(p, req->data, req->len);
1589 /*! \brief Send SIP Request to the other part of the dialogue */
1590 static int send_request(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno)
1594 if (sip_debug_test_pvt(p)) {
1595 char iabuf[INET_ADDRSTRLEN];
1596 if (ast_test_flag(&p->flags[0], SIP_NAT_ROUTE))
1597 ast_verbose("%sTransmitting (NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->recv.sin_addr), ntohs(p->recv.sin_port), req->data);
1599 ast_verbose("%sTransmitting (no NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->sa.sin_addr), ntohs(p->sa.sin_port), req->data);
1601 if (recordhistory) {
1602 struct sip_request tmp;
1603 parse_copy(&tmp, req);
1604 append_history(p, reliable ? "TxReqRel" : "TxReq", "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1607 __sip_reliable_xmit(p, seqno, 0, req->data, req->len, (reliable > 1), req->method) :
1608 __sip_xmit(p, req->data, req->len);
1612 /*! \brief Pick out text in brackets from character string
1613 \return pointer to terminated stripped string
1614 \param tmp input string that will be modified */
1615 static char *get_in_brackets(char *tmp)
1619 char *first_bracket;
1620 char *second_bracket;
1625 first_quote = strchr(parse, '"');
1626 first_bracket = strchr(parse, '<');
1627 if (first_quote && first_bracket && (first_quote < first_bracket)) {
1629 for (parse = first_quote + 1; *parse; parse++) {
1630 if ((*parse == '"') && (last_char != '\\'))
1635 ast_log(LOG_WARNING, "No closing quote found in '%s'\n", tmp);
1641 if (first_bracket) {
1642 second_bracket = strchr(first_bracket + 1, '>');
1643 if (second_bracket) {
1644 *second_bracket = '\0';
1645 return first_bracket + 1;
1647 ast_log(LOG_WARNING, "No closing bracket found in '%s'\n", tmp);
1655 /*! \brief Send SIP MESSAGE text within a call
1656 Called from PBX core sendtext() application */
1657 static int sip_sendtext(struct ast_channel *ast, const char *text)
1659 struct sip_pvt *p = ast->tech_pvt;
1660 int debug = sip_debug_test_pvt(p);
1663 ast_verbose("Sending text %s on %s\n", text, ast->name);
1666 if (ast_strlen_zero(text))
1669 ast_verbose("Really sending text %s on %s\n", text, ast->name);
1670 transmit_message_with_text(p, text);
1674 /*! \brief Update peer object in realtime storage */
1675 static void realtime_update_peer(const char *peername, struct sockaddr_in *sin, const char *username, const char *fullcontact, int expirey)
1679 char regseconds[20];
1684 snprintf(regseconds, sizeof(regseconds), "%d", (int)nowtime); /* Expiration time */
1685 ast_inet_ntoa(ipaddr, sizeof(ipaddr), sin->sin_addr);
1686 snprintf(port, sizeof(port), "%d", ntohs(sin->sin_port));
1689 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, "username", username, "fullcontact", fullcontact, NULL);
1691 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, "username", username, NULL);
1694 /*! \brief Automatically add peer extension to dial plan */
1695 static void register_peer_exten(struct sip_peer *peer, int onoff)
1698 char *stringp, *ext;
1699 if (!ast_strlen_zero(global_regcontext)) {
1701 ast_copy_string(multi, S_OR(peer->regexten, peer->name), sizeof(multi));
1703 while((ext = strsep(&stringp, "&"))) {
1705 ast_add_extension(global_regcontext, 1, ext, 1, NULL, NULL, "Noop",
1706 ast_strdup(peer->name), free, "SIP");
1708 ast_context_remove_extension(global_regcontext, ext, 1, NULL);
1713 /*! \brief Destroy peer object from memory */
1714 static void sip_destroy_peer(struct sip_peer *peer)
1716 if (option_debug > 2)
1717 ast_log(LOG_DEBUG, "Destroying SIP peer %s\n", peer->name);
1719 /* Delete it, it needs to disappear */
1721 sip_destroy(peer->call);
1723 if (peer->mwipvt) { /* We have an active subscription, delete it */
1724 sip_destroy(peer->mwipvt);
1727 if (peer->chanvars) {
1728 ast_variables_destroy(peer->chanvars);
1729 peer->chanvars = NULL;
1731 if (peer->expire > -1)
1732 ast_sched_del(sched, peer->expire);
1733 if (peer->pokeexpire > -1)
1734 ast_sched_del(sched, peer->pokeexpire);
1735 register_peer_exten(peer, FALSE);
1736 ast_free_ha(peer->ha);
1737 if (ast_test_flag(&peer->flags[1], SIP_PAGE2_SELFDESTRUCT))
1739 else if (ast_test_flag(&peer->flags[0], SIP_REALTIME))
1743 clear_realm_authentication(peer->auth);
1744 peer->auth = (struct sip_auth *) NULL;
1746 ast_dnsmgr_release(peer->dnsmgr);
1750 /*! \brief Update peer data in database (if used) */
1751 static void update_peer(struct sip_peer *p, int expiry)
1753 int rtcachefriends = ast_test_flag(&p->flags[1], SIP_PAGE2_RTCACHEFRIENDS);
1754 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTUPDATE) &&
1755 (ast_test_flag(&p->flags[0], SIP_REALTIME) || rtcachefriends)) {
1756 realtime_update_peer(p->name, &p->addr, p->username, rtcachefriends ? p->fullcontact : NULL, expiry);
1761 /*! \brief realtime_peer: Get peer from realtime storage
1762 * Checks the "sippeers" realtime family from extconfig.conf
1763 * \todo Consider adding check of port address when matching here to follow the same
1764 * algorithm as for static peers. Will we break anything by adding that?
1766 static struct sip_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
1768 struct sip_peer *peer = NULL;
1769 struct ast_variable *var;
1770 struct ast_variable *tmp;
1771 char *newpeername = (char *) peername;
1774 /* First check on peer name */
1776 var = ast_load_realtime("sippeers", "name", peername, NULL);
1777 else if (sin) { /* Then check on IP address for dynamic peers */
1778 ast_inet_ntoa(iabuf, sizeof(iabuf), sin->sin_addr);
1779 var = ast_load_realtime("sippeers", "host", iabuf, NULL); /* First check for fixed IP hosts */
1781 var = ast_load_realtime("sippeers", "ipaddr", iabuf, NULL); /* Then check for registred hosts */
1789 for (tmp = var; tmp; tmp = tmp->next) {
1790 /* If this is type=user, then skip this object. */
1791 if (!strcasecmp(tmp->name, "type") &&
1792 !strcasecmp(tmp->value, "user")) {
1793 ast_variables_destroy(var);
1795 } else if (!newpeername && !strcasecmp(tmp->name, "name")) {
1796 newpeername = tmp->value;
1800 if (!newpeername) { /* Did not find peer in realtime */
1801 ast_log(LOG_WARNING, "Cannot Determine peer name ip=%s\n", iabuf);
1802 ast_variables_destroy(var);
1803 return (struct sip_peer *) NULL;
1806 /* Peer found in realtime, now build it in memory */
1807 peer = build_peer(newpeername, var, !ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS));
1809 ast_variables_destroy(var);
1810 return (struct sip_peer *) NULL;
1813 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS)) {
1815 ast_copy_flags(&peer->flags[1],&global_flags[1], SIP_PAGE2_RTAUTOCLEAR|SIP_PAGE2_RTCACHEFRIENDS);
1816 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTAUTOCLEAR)) {
1817 if (peer->expire > -1) {
1818 ast_sched_del(sched, peer->expire);
1820 peer->expire = ast_sched_add(sched, (global_rtautoclear) * 1000, expire_register, (void *)peer);
1822 ASTOBJ_CONTAINER_LINK(&peerl,peer);
1824 ast_set_flag(&peer->flags[0], SIP_REALTIME);
1826 ast_variables_destroy(var);
1831 /*! \brief Support routine for find_peer */
1832 static int sip_addrcmp(char *name, struct sockaddr_in *sin)
1834 /* We know name is the first field, so we can cast */
1835 struct sip_peer *p = (struct sip_peer *) name;
1836 return !(!inaddrcmp(&p->addr, sin) ||
1837 (ast_test_flag(&p->flags[0], SIP_INSECURE_PORT) &&
1838 (p->addr.sin_addr.s_addr == sin->sin_addr.s_addr)));
1841 /*! \brief Locate peer by name or ip address
1842 * This is used on incoming SIP message to find matching peer on ip
1843 or outgoing message to find matching peer on name */
1844 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
1846 struct sip_peer *p = NULL;
1849 p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
1851 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, name, sip_addr_hashfunc, 1, sip_addrcmp);
1853 if (!p && realtime) {
1854 p = realtime_peer(peer, sin);
1859 /*! \brief Remove user object from in-memory storage */
1860 static void sip_destroy_user(struct sip_user *user)
1862 if (option_debug > 2)
1863 ast_log(LOG_DEBUG, "Destroying user object from memory: %s\n", user->name);
1864 ast_free_ha(user->ha);
1865 if (user->chanvars) {
1866 ast_variables_destroy(user->chanvars);
1867 user->chanvars = NULL;
1869 if (ast_test_flag(&user->flags[0], SIP_REALTIME))
1876 /*! \brief Load user from realtime storage
1877 * Loads user from "sipusers" category in realtime (extconfig.conf)
1878 * Users are matched on From: user name (the domain in skipped) */
1879 static struct sip_user *realtime_user(const char *username)
1881 struct ast_variable *var;
1882 struct ast_variable *tmp;
1883 struct sip_user *user = NULL;
1885 var = ast_load_realtime("sipusers", "name", username, NULL);
1890 for (tmp = var; tmp; tmp = tmp->next) {
1891 if (!strcasecmp(tmp->name, "type") &&
1892 !strcasecmp(tmp->value, "peer")) {
1893 ast_variables_destroy(var);
1898 user = build_user(username, var, !ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS));
1900 if (!user) { /* No user found */
1901 ast_variables_destroy(var);
1905 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS)) {
1906 ast_set_flag(&user->flags[1], SIP_PAGE2_RTCACHEFRIENDS);
1908 ASTOBJ_CONTAINER_LINK(&userl,user);
1910 /* Move counter from s to r... */
1913 ast_set_flag(&user->flags[0], SIP_REALTIME);
1915 ast_variables_destroy(var);
1919 /*! \brief Locate user by name
1920 * Locates user by name (From: sip uri user name part) first
1921 * from in-memory list (static configuration) then from
1922 * realtime storage (defined in extconfig.conf) */
1923 static struct sip_user *find_user(const char *name, int realtime)
1925 struct sip_user *u = NULL;
1926 u = ASTOBJ_CONTAINER_FIND(&userl,name);
1927 if (!u && realtime) {
1928 u = realtime_user(name);
1933 /*! \brief Create address structure from peer reference */
1934 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer)
1936 if ((peer->addr.sin_addr.s_addr || peer->defaddr.sin_addr.s_addr) &&
1937 (!peer->maxms || ((peer->lastms >= 0) && (peer->lastms <= peer->maxms)))) {
1938 if (peer->addr.sin_addr.s_addr) {
1939 r->sa.sin_family = peer->addr.sin_family;
1940 r->sa.sin_addr = peer->addr.sin_addr;
1941 r->sa.sin_port = peer->addr.sin_port;
1943 r->sa.sin_family = peer->defaddr.sin_family;
1944 r->sa.sin_addr = peer->defaddr.sin_addr;
1945 r->sa.sin_port = peer->defaddr.sin_port;
1947 memcpy(&r->recv, &r->sa, sizeof(r->recv));
1952 ast_copy_flags(&r->flags[0], &peer->flags[0], SIP_FLAGS_TO_COPY);
1953 ast_copy_flags(&r->flags[1], &peer->flags[1], SIP_PAGE2_FLAGS_TO_COPY);
1954 r->capability = peer->capability;
1955 if (!ast_test_flag(&r->flags[1], SIP_PAGE2_VIDEOSUPPORT) && r->vrtp) {
1956 ast_rtp_destroy(r->vrtp);
1959 r->prefs = peer->prefs;
1962 ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", (ast_test_flag(&r->flags[0], SIP_NAT) & SIP_NAT_ROUTE));
1963 ast_rtp_setnat(r->rtp, (ast_test_flag(&r->flags[0], SIP_NAT) & SIP_NAT_ROUTE));
1967 ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", (ast_test_flag(&r->flags[0], SIP_NAT) & SIP_NAT_ROUTE));
1968 ast_rtp_setnat(r->vrtp, (ast_test_flag(&r->flags[0], SIP_NAT) & SIP_NAT_ROUTE));
1970 ast_string_field_set(r, peername, peer->username);
1971 ast_string_field_set(r, authname, peer->username);
1972 ast_string_field_set(r, username, peer->username);
1973 ast_string_field_set(r, peersecret, peer->secret);
1974 ast_string_field_set(r, peermd5secret, peer->md5secret);
1975 ast_string_field_set(r, tohost, peer->tohost);
1976 ast_string_field_set(r, fullcontact, peer->fullcontact);
1977 if (!r->initreq.headers && !ast_strlen_zero(peer->fromdomain)) {
1980 tmpcall = ast_strdupa(r->callid);
1982 c = strchr(tmpcall, '@');
1985 ast_string_field_build(r, callid, "%s@%s", tmpcall, peer->fromdomain);
1989 if (ast_strlen_zero(r->tohost)) {
1990 char iabuf[INET_ADDRSTRLEN];
1992 ast_inet_ntoa(iabuf, sizeof(iabuf), peer->addr.sin_addr.s_addr ? peer->addr.sin_addr : peer->defaddr.sin_addr);
1994 ast_string_field_set(r, tohost, iabuf);
1996 if (!ast_strlen_zero(peer->fromdomain))
1997 ast_string_field_set(r, fromdomain, peer->fromdomain);
1998 if (!ast_strlen_zero(peer->fromuser))
1999 ast_string_field_set(r, fromuser, peer->fromuser);
2000 r->maxtime = peer->maxms;
2001 r->callgroup = peer->callgroup;
2002 r->pickupgroup = peer->pickupgroup;
2003 /* Set timer T1 to RTT for this peer (if known by qualify=) */
2004 /* Minimum is settable or default to 100 ms */
2005 if (peer->maxms && peer->lastms)
2006 r->timer_t1 = peer->lastms < global_t1min ? global_t1min : peer->lastms;
2007 if ((ast_test_flag(&r->flags[0], SIP_DTMF) == SIP_DTMF_RFC2833) ||
2008 (ast_test_flag(&r->flags[0], SIP_DTMF) == SIP_DTMF_AUTO))
2009 r->noncodeccapability |= AST_RTP_DTMF;
2011 r->noncodeccapability &= ~AST_RTP_DTMF;
2012 ast_string_field_set(r, context, peer->context);
2013 r->rtptimeout = peer->rtptimeout;
2014 r->rtpholdtimeout = peer->rtpholdtimeout;
2015 r->rtpkeepalive = peer->rtpkeepalive;
2016 if (peer->call_limit)
2017 ast_set_flag(&r->flags[0], SIP_CALL_LIMIT);
2018 r->maxcallbitrate = peer->maxcallbitrate;
2023 /*! \brief create address structure from peer name
2024 * Or, if peer not found, find it in the global DNS
2025 * returns TRUE (-1) on failure, FALSE on success */
2026 static int create_addr(struct sip_pvt *dialog, const char *opeer)
2029 struct ast_hostent ahp;
2034 char host[MAXHOSTNAMELEN], *hostn;
2037 ast_copy_string(peer, opeer, sizeof(peer));
2038 port = strchr(peer, ':');
2043 dialog->sa.sin_family = AF_INET;
2044 dialog->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
2045 p = find_peer(peer, NULL, 1);
2049 if (create_addr_from_peer(dialog, p))
2050 ASTOBJ_UNREF(p, sip_destroy_peer);
2058 portno = atoi(port);
2060 portno = DEFAULT_SIP_PORT;
2062 char service[MAXHOSTNAMELEN];
2065 snprintf(service, sizeof(service), "_sip._udp.%s", peer);
2066 ret = ast_get_srv(NULL, host, sizeof(host), &tportno, service);
2072 hp = ast_gethostbyname(hostn, &ahp);
2074 ast_string_field_set(dialog, tohost, peer);
2075 memcpy(&dialog->sa.sin_addr, hp->h_addr, sizeof(dialog->sa.sin_addr));
2076 dialog->sa.sin_port = htons(portno);
2077 memcpy(&dialog->recv, &dialog->sa, sizeof(dialog->recv));
2080 ast_log(LOG_WARNING, "No such host: %s\n", peer);
2084 ASTOBJ_UNREF(p, sip_destroy_peer);
2089 /*! \brief Scheduled congestion on a call */
2090 static int auto_congest(void *nothing)
2092 struct sip_pvt *p = nothing;
2094 ast_mutex_lock(&p->lock);
2097 if (!ast_mutex_trylock(&p->owner->lock)) {
2098 ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
2099 ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
2100 ast_mutex_unlock(&p->owner->lock);
2103 ast_mutex_unlock(&p->lock);
2110 /*! \brief Initiate SIP call from PBX
2111 * used from the dial() application */
2112 static int sip_call(struct ast_channel *ast, char *dest, int timeout)
2117 const char *osphandle = NULL;
2119 struct varshead *headp;
2120 struct ast_var_t *current;
2123 if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
2124 ast_log(LOG_WARNING, "sip_call called on %s, neither down nor reserved\n", ast->name);
2128 /* Check whether there is vxml_url, distinctive ring variables */
2129 headp=&ast->varshead;
2130 AST_LIST_TRAVERSE(headp,current,entries) {
2131 /* Check whether there is a VXML_URL variable */
2132 if (!p->options->vxml_url && !strcasecmp(ast_var_name(current), "VXML_URL")) {
2133 p->options->vxml_url = ast_var_value(current);
2134 } else if (!p->options->uri_options && !strcasecmp(ast_var_name(current), "SIP_URI_OPTIONS")) {
2135 p->options->uri_options = ast_var_value(current);
2136 } else if (!p->options->distinctive_ring && !strcasecmp(ast_var_name(current), "ALERT_INFO")) {
2137 /* Check whether there is a ALERT_INFO variable */
2138 p->options->distinctive_ring = ast_var_value(current);
2139 } else if (!p->options->addsipheaders && !strncasecmp(ast_var_name(current), "SIPADDHEADER", strlen("SIPADDHEADER"))) {
2140 /* Check whether there is a variable with a name starting with SIPADDHEADER */
2141 p->options->addsipheaders = 1;
2146 else if (!p->options->osptoken && !strcasecmp(ast_var_name(current), "OSPTOKEN")) {
2147 p->options->osptoken = ast_var_value(current);
2148 } else if (!osphandle && !strcasecmp(ast_var_name(current), "OSPHANDLE")) {
2149 osphandle = ast_var_value(current);
2155 ast_set_flag(&p->flags[0], SIP_OUTGOING);
2157 if (!p->options->osptoken || !osphandle || (sscanf(osphandle, "%d", &p->osphandle) != 1)) {
2158 /* Force Disable OSP support */
2160 ast_log(LOG_DEBUG, "Disabling OSP support for this call. osptoken = %s, osphandle = %s\n", p->options->osptoken, osphandle);
2161 p->options->osptoken = NULL;
2166 ast_log(LOG_DEBUG, "Outgoing Call for %s\n", p->username);
2167 res = update_call_counter(p, INC_CALL_LIMIT);
2169 p->callingpres = ast->cid.cid_pres;
2170 p->jointcapability = p->capability;
2171 transmit_invite(p, SIP_INVITE, 1, 2);
2173 /* Initialize auto-congest time */
2174 p->initid = ast_sched_add(sched, p->maxtime * 4, auto_congest, p);
2180 /*! \brief Destroy registry object
2181 Objects created with the register= statement in static configuration */
2182 static void sip_registry_destroy(struct sip_registry *reg)
2185 if (option_debug > 2)
2186 ast_log(LOG_DEBUG, "Destroying registry entry for %s@%s\n", reg->username, reg->hostname);
2189 /* Clear registry before destroying to ensure
2190 we don't get reentered trying to grab the registry lock */
2191 reg->call->registry = NULL;
2192 if (option_debug > 2)
2193 ast_log(LOG_DEBUG, "Destroying active SIP dialog for registry %s@%s\n", reg->username, reg->hostname);
2194 sip_destroy(reg->call);
2196 if (reg->expire > -1)
2197 ast_sched_del(sched, reg->expire);
2198 if (reg->timeout > -1)
2199 ast_sched_del(sched, reg->timeout);
2200 ast_string_field_free_all(reg);
2206 /*! \brief Execute destrucion of SIP dialog structure, release memory */
2207 static void __sip_destroy(struct sip_pvt *p, int lockowner)
2209 struct sip_pvt *cur, *prev = NULL;
2212 if (sip_debug_test_pvt(p) || option_debug > 2)
2213 ast_verbose("Really destroying SIP dialog '%s' Method: %s\n", p->callid, sip_methods[p->method].text);
2215 /* Remove link from peer to subscription of MWI */
2216 if (p->relatedpeer && p->relatedpeer->mwipvt)
2217 p->relatedpeer->mwipvt = (struct sip_pvt *) NULL;
2220 sip_dump_history(p);
2225 if (p->stateid > -1)
2226 ast_extension_state_del(p->stateid, NULL);
2228 ast_sched_del(sched, p->initid);
2229 if (p->autokillid > -1)
2230 ast_sched_del(sched, p->autokillid);
2233 ast_rtp_destroy(p->rtp);
2236 ast_rtp_destroy(p->vrtp);
2239 free_old_route(p->route);
2243 if (p->registry->call == p)
2244 p->registry->call = NULL;
2245 ASTOBJ_UNREF(p->registry, sip_registry_destroy);
2248 /* Unlink us from the owner if we have one */
2251 ast_mutex_lock(&p->owner->lock);
2253 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
2254 p->owner->tech_pvt = NULL;
2256 ast_mutex_unlock(&p->owner->lock);
2260 while(!AST_LIST_EMPTY(p->history)) {
2261 struct sip_history *hist = AST_LIST_FIRST(p->history);
2262 AST_LIST_REMOVE_HEAD(p->history, list);
2273 prev->next = cur->next;
2282 ast_log(LOG_WARNING, "Trying to destroy \"%s\", not found in dialog list?!?! \n", p->callid);
2286 ast_sched_del(sched, p->initid);
2288 /* remove all current packets in this dialog */
2289 while((cp = p->packets)) {
2290 p->packets = p->packets->next;
2291 if (cp->retransid > -1) {
2292 ast_sched_del(sched, cp->retransid);
2297 ast_variables_destroy(p->chanvars);
2300 ast_mutex_destroy(&p->lock);
2302 ast_string_field_free_all(p);
2307 /*! \brief update_call_counter: Handle call_limit for SIP users
2308 * Setting a call-limit will cause calls above the limit not to be accepted.
2310 * Remember that for a type=friend, there's one limit for the user and
2311 * another for the peer, not a combined call limit.
2312 * This will cause unexpected behaviour in subscriptions, since a "friend"
2313 * is *two* devices in Asterisk, not one.
2315 * Thought: For realtime, we should propably update storage with inuse counter...
2317 * \return 0 if call is ok (no call limit, below treshold)
2318 * -1 on rejection of call
2321 static int update_call_counter(struct sip_pvt *fup, int event)
2324 int *inuse, *call_limit;
2325 int outgoing = ast_test_flag(&fup->flags[0], SIP_OUTGOING);
2326 struct sip_user *u = NULL;
2327 struct sip_peer *p = NULL;
2329 if (option_debug > 2)
2330 ast_log(LOG_DEBUG, "Updating call counter for %s call\n", outgoing ? "outgoing" : "incoming");
2331 /* Test if we need to check call limits, in order to avoid
2332 realtime lookups if we do not need it */
2333 if (!ast_test_flag(&fup->flags[0], SIP_CALL_LIMIT))
2336 ast_copy_string(name, fup->username, sizeof(name));
2338 /* Check the list of users */
2339 if (!outgoing) /* Only check users for incoming calls */
2340 u = find_user(name, 1);
2344 call_limit = &u->call_limit;
2347 /* Try to find peer */
2349 p = find_peer(fup->peername, NULL, 1);
2352 call_limit = &p->call_limit;
2353 ast_copy_string(name, fup->peername, sizeof(name));
2355 if (option_debug > 1)
2356 ast_log(LOG_DEBUG, "%s is not a local user, no call limit\n", name);
2361 /* incoming and outgoing affects the inUse counter */
2362 case DEC_CALL_LIMIT:
2364 if (ast_test_flag(&fup->flags[0], SIP_INC_COUNT))
2369 if (option_debug > 1 || sipdebug) {
2370 ast_log(LOG_DEBUG, "Call %s %s '%s' removed from call limit %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *call_limit);
2373 case INC_CALL_LIMIT:
2374 if (*call_limit > 0 ) {
2375 if (*inuse >= *call_limit) {
2376 ast_log(LOG_ERROR, "Call %s %s '%s' rejected due to usage limit of %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *call_limit);
2378 ASTOBJ_UNREF(u, sip_destroy_user);
2380 ASTOBJ_UNREF(p, sip_destroy_peer);
2385 ast_set_flag(&fup->flags[0], SIP_INC_COUNT);
2386 if (option_debug > 1 || sipdebug) {
2387 ast_log(LOG_DEBUG, "Call %s %s '%s' is %d out of %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *inuse, *call_limit);
2391 ast_log(LOG_ERROR, "update_call_counter(%s, %d) called with no event!\n", name, event);
2394 ASTOBJ_UNREF(u, sip_destroy_user);
2396 ASTOBJ_UNREF(p, sip_destroy_peer);
2400 /*! \brief Destroy SIP call structure */
2401 static void sip_destroy(struct sip_pvt *p)
2403 ast_mutex_lock(&iflock);
2404 if (option_debug > 2)
2405 ast_log(LOG_DEBUG, "Destroying SIP dialog %s\n", p->callid);
2406 __sip_destroy(p, 1);
2407 ast_mutex_unlock(&iflock);
2410 /*! \brief Convert SIP hangup causes to Asterisk hangup causes */
2411 static int hangup_sip2cause(int cause)
2413 /* Possible values taken from causes.h */
2416 case 401: /* Unauthorized */
2417 return AST_CAUSE_CALL_REJECTED;
2418 case 403: /* Not found */
2419 return AST_CAUSE_CALL_REJECTED;
2420 case 404: /* Not found */
2421 return AST_CAUSE_UNALLOCATED;
2422 case 405: /* Method not allowed */
2423 return AST_CAUSE_INTERWORKING;
2424 case 407: /* Proxy authentication required */
2425 return AST_CAUSE_CALL_REJECTED;
2426 case 408: /* No reaction */
2427 return AST_CAUSE_NO_USER_RESPONSE;
2428 case 409: /* Conflict */
2429 return AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
2430 case 410: /* Gone */
2431 return AST_CAUSE_UNALLOCATED;
2432 case 411: /* Length required */
2433 return AST_CAUSE_INTERWORKING;
2434 case 413: /* Request entity too large */
2435 return AST_CAUSE_INTERWORKING;
2436 case 414: /* Request URI too large */
2437 return AST_CAUSE_INTERWORKING;
2438 case 415: /* Unsupported media type */
2439 return AST_CAUSE_INTERWORKING;
2440 case 420: /* Bad extension */
2441 return AST_CAUSE_NO_ROUTE_DESTINATION;
2442 case 480: /* No answer */
2443 return AST_CAUSE_FAILURE;
2444 case 481: /* No answer */
2445 return AST_CAUSE_INTERWORKING;
2446 case 482: /* Loop detected */
2447 return AST_CAUSE_INTERWORKING;
2448 case 483: /* Too many hops */
2449 return AST_CAUSE_NO_ANSWER;
2450 case 484: /* Address incomplete */
2451 return AST_CAUSE_INVALID_NUMBER_FORMAT;
2452 case 485: /* Ambigous */
2453 return AST_CAUSE_UNALLOCATED;
2454 case 486: /* Busy everywhere */
2455 return AST_CAUSE_BUSY;
2456 case 487: /* Request terminated */
2457 return AST_CAUSE_INTERWORKING;
2458 case 488: /* No codecs approved */
2459 return AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
2460 case 491: /* Request pending */
2461 return AST_CAUSE_INTERWORKING;
2462 case 493: /* Undecipherable */
2463 return AST_CAUSE_INTERWORKING;
2464 case 500: /* Server internal failure */
2465 return AST_CAUSE_FAILURE;
2466 case 501: /* Call rejected */
2467 return AST_CAUSE_FACILITY_REJECTED;
2469 return AST_CAUSE_DESTINATION_OUT_OF_ORDER;
2470 case 503: /* Service unavailable */
2471 return AST_CAUSE_CONGESTION;
2472 case 504: /* Gateway timeout */
2473 return AST_CAUSE_RECOVERY_ON_TIMER_EXPIRE;
2474 case 505: /* SIP version not supported */
2475 return AST_CAUSE_INTERWORKING;
2476 case 600: /* Busy everywhere */
2477 return AST_CAUSE_USER_BUSY;
2478 case 603: /* Decline */
2479 return AST_CAUSE_CALL_REJECTED;
2480 case 604: /* Does not exist anywhere */
2481 return AST_CAUSE_UNALLOCATED;
2482 case 606: /* Not acceptable */
2483 return AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
2485 return AST_CAUSE_NORMAL;
2491 /*! \brief Convert Asterisk hangup causes to SIP codes
2493 Possible values from causes.h
2494 AST_CAUSE_NOTDEFINED AST_CAUSE_NORMAL AST_CAUSE_BUSY
2495 AST_CAUSE_FAILURE AST_CAUSE_CONGESTION AST_CAUSE_UNALLOCATED
2497 In addition to these, a lot of PRI codes is defined in causes.h
2498 ...should we take care of them too ?
2502 ISUP Cause value SIP response
2503 ---------------- ------------
2504 1 unallocated number 404 Not Found
2505 2 no route to network 404 Not found
2506 3 no route to destination 404 Not found
2507 16 normal call clearing --- (*)
2508 17 user busy 486 Busy here
2509 18 no user responding 408 Request Timeout
2510 19 no answer from the user 480 Temporarily unavailable
2511 20 subscriber absent 480 Temporarily unavailable
2512 21 call rejected 403 Forbidden (+)
2513 22 number changed (w/o diagnostic) 410 Gone
2514 22 number changed (w/ diagnostic) 301 Moved Permanently
2515 23 redirection to new destination 410 Gone
2516 26 non-selected user clearing 404 Not Found (=)
2517 27 destination out of order 502 Bad Gateway
2518 28 address incomplete 484 Address incomplete
2519 29 facility rejected 501 Not implemented
2520 31 normal unspecified 480 Temporarily unavailable
2523 static char *hangup_cause2sip(int cause)
2527 case AST_CAUSE_UNALLOCATED: /* 1 */
2528 case AST_CAUSE_NO_ROUTE_DESTINATION: /* 3 IAX2: Can't find extension in context */
2529 case AST_CAUSE_NO_ROUTE_TRANSIT_NET: /* 2 */
2530 return "404 Not Found";
2531 case AST_CAUSE_CONGESTION: /* 34 */
2532 case AST_CAUSE_SWITCH_CONGESTION: /* 42 */
2533 return "503 Service Unavailable";
2534 case AST_CAUSE_NO_USER_RESPONSE: /* 18 */
2535 return "408 Request Timeout";
2536 case AST_CAUSE_NO_ANSWER: /* 19 */
2537 return "480 Temporarily unavailable";
2538 case AST_CAUSE_CALL_REJECTED: /* 21 */
2539 return "403 Forbidden";
2540 case AST_CAUSE_NUMBER_CHANGED: /* 22 */
2542 case AST_CAUSE_NORMAL_UNSPECIFIED: /* 31 */
2543 return "480 Temporarily unavailable";
2544 case AST_CAUSE_INVALID_NUMBER_FORMAT:
2545 return "484 Address incomplete";
2546 case AST_CAUSE_USER_BUSY:
2547 return "486 Busy here";
2548 case AST_CAUSE_FAILURE:
2549 return "500 Server internal failure";
2550 case AST_CAUSE_FACILITY_REJECTED: /* 29 */
2551 return "501 Not Implemented";
2552 case AST_CAUSE_CHAN_NOT_IMPLEMENTED:
2553 return "503 Service Unavailable";
2554 /* Used in chan_iax2 */
2555 case AST_CAUSE_DESTINATION_OUT_OF_ORDER:
2556 return "502 Bad Gateway";
2557 case AST_CAUSE_BEARERCAPABILITY_NOTAVAIL: /* Can't find codec to connect to host */
2558 return "488 Not Acceptable Here";
2560 case AST_CAUSE_NOTDEFINED:
2562 ast_log(LOG_DEBUG, "AST hangup cause %d (no match found in SIP)\n", cause);
2571 /*! \brief sip_hangup: Hangup SIP call
2572 * Part of PBX interface, called from ast_hangup */
2573 static int sip_hangup(struct ast_channel *ast)
2575 struct sip_pvt *p = ast->tech_pvt;
2576 int needcancel = FALSE;
2577 struct ast_flags locflags = {0};
2580 ast_log(LOG_DEBUG, "Asked to hangup channel that was not connected\n");
2583 if (option_debug && sipdebug)
2584 ast_log(LOG_DEBUG, "Hangup call %s, SIP callid %s)\n", ast->name, p->callid);
2586 ast_mutex_lock(&p->lock);
2588 if ((p->osphandle > -1) && (ast->_state == AST_STATE_UP)) {
2589 ast_osp_terminate(p->osphandle, AST_CAUSE_NORMAL, p->ospstart, time(NULL) - p->ospstart);
2592 if (option_debug && sipdebug)
2593 ast_log(LOG_DEBUG, "update_call_counter(%s) - decrement call limit counter on hangup\n", p->username);
2594 update_call_counter(p, DEC_CALL_LIMIT);
2595 /* Determine how to disconnect */
2596 if (p->owner != ast) {
2597 ast_log(LOG_WARNING, "Huh? We aren't the owner? Can't hangup call.\n");
2598 ast_mutex_unlock(&p->lock);
2601 /* If the call is not UP, we need to send CANCEL instead of BYE */
2602 if (ast->_state != AST_STATE_UP)
2608 ast_dsp_free(p->vad);
2611 ast->tech_pvt = NULL;
2613 ast_mutex_lock(&usecnt_lock);
2615 ast_mutex_unlock(&usecnt_lock);
2616 ast_update_use_count();
2618 ast_set_flag(&locflags, SIP_NEEDDESTROY);
2620 /* Start the process if it's not already started */
2621 if (!ast_test_flag(&p->flags[0], SIP_ALREADYGONE) && !ast_strlen_zero(p->initreq.data)) {
2622 if (needcancel) { /* Outgoing call, not up */
2623 if (ast_test_flag(&p->flags[0], SIP_OUTGOING)) {
2624 /* stop retransmitting an INVITE that has not received a response */
2625 __sip_pretend_ack(p);
2627 /* Send a new request: CANCEL */
2628 transmit_request_with_auth(p, SIP_CANCEL, p->ocseq, XMIT_RELIABLE, 0);
2629 /* Actually don't destroy us yet, wait for the 487 on our original
2630 INVITE, but do set an autodestruct just in case we never get it. */
2631 ast_clear_flag(&locflags, SIP_NEEDDESTROY);
2633 sip_scheddestroy(p, 32000);
2634 if ( p->initid != -1 ) {
2635 /* channel still up - reverse dec of inUse counter
2636 only if the channel is not auto-congested */
2637 update_call_counter(p, INC_CALL_LIMIT);
2639 } else { /* Incoming call, not up */
2641 if (ast->hangupcause && ((res = hangup_cause2sip(ast->hangupcause)))) {
2642 transmit_response_reliable(p, res, &p->initreq);
2644 transmit_response_reliable(p, "603 Declined", &p->initreq);
2646 } else { /* Call is in UP state, send BYE */
2647 if (!p->pendinginvite) {
2649 transmit_request_with_auth(p, SIP_BYE, 0, XMIT_RELIABLE, 1);
2651 /* Note we will need a BYE when this all settles out
2652 but we can't send one while we have "INVITE" outstanding. */
2653 ast_set_flag(&p->flags[0], SIP_PENDINGBYE);
2654 ast_clear_flag(&p->flags[0], SIP_NEEDREINVITE);
2658 ast_copy_flags(&p->flags[0], &locflags, SIP_NEEDDESTROY);
2659 ast_mutex_unlock(&p->lock);
2663 /*! \brief Try setting codec suggested by the SIP_CODEC channel variable */
2664 static void try_suggested_sip_codec(struct sip_pvt *p)
2669 codec = pbx_builtin_getvar_helper(p->owner, "SIP_CODEC");
2673 fmt = ast_getformatbyname(codec);
2675 ast_log(LOG_NOTICE, "Changing codec to '%s' for this call because of ${SIP_CODEC) variable\n", codec);
2676 if (p->jointcapability & fmt) {
2677 p->jointcapability &= fmt;
2678 p->capability &= fmt;
2680 ast_log(LOG_NOTICE, "Ignoring ${SIP_CODEC} variable because it is not shared by both ends.\n");
2682 ast_log(LOG_NOTICE, "Ignoring ${SIP_CODEC} variable because of unrecognized/not configured codec (check allow/disallow in sip.conf): %s\n", codec);
2686 /*! \brief sip_answer: Answer SIP call , send 200 OK on Invite
2687 * Part of PBX interface */
2688 static int sip_answer(struct ast_channel *ast)
2691 struct sip_pvt *p = ast->tech_pvt;
2693 ast_mutex_lock(&p->lock);
2694 if (ast->_state != AST_STATE_UP) {
2698 try_suggested_sip_codec(p);
2700 ast_setstate(ast, AST_STATE_UP);
2702 ast_log(LOG_DEBUG, "SIP answering channel: %s\n", ast->name);
2703 res = transmit_response_with_sdp(p, "200 OK", &p->initreq, XMIT_RELIABLE);
2705 ast_mutex_unlock(&p->lock);
2709 /*! \brief Send frame to media channel (rtp) */
2710 static int sip_write(struct ast_channel *ast, struct ast_frame *frame)
2712 struct sip_pvt *p = ast->tech_pvt;
2715 switch (frame->frametype) {
2716 case AST_FRAME_VOICE:
2717 if (!(frame->subclass & ast->nativeformats)) {
2718 ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
2719 frame->subclass, ast->nativeformats, ast->readformat, ast->writeformat);
2723 ast_mutex_lock(&p->lock);
2725 /* If channel is not up, activate early media session */
2726 if ((ast->_state != AST_STATE_UP) &&
2727 !ast_test_flag(&p->flags[0], SIP_PROGRESS_SENT) &&
2728 !ast_test_flag(&p->flags[0], SIP_OUTGOING)) {
2729 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, XMIT_UNRELIABLE);
2730 ast_set_flag(&p->flags[0], SIP_PROGRESS_SENT);
2732 time(&p->lastrtptx);
2733 res = ast_rtp_write(p->rtp, frame);
2735 ast_mutex_unlock(&p->lock);
2738 case AST_FRAME_VIDEO:
2740 ast_mutex_lock(&p->lock);
2742 /* Activate video early media */
2743 if ((ast->_state != AST_STATE_UP) &&
2744 !ast_test_flag(&p->flags[0], SIP_PROGRESS_SENT) &&
2745 !ast_test_flag(&p->flags[0], SIP_OUTGOING)) {
2746 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, XMIT_UNRELIABLE);
2747 ast_set_flag(&p->flags[0], SIP_PROGRESS_SENT);
2749 time(&p->lastrtptx);
2750 res = ast_rtp_write(p->vrtp, frame);
2752 ast_mutex_unlock(&p->lock);
2755 case AST_FRAME_IMAGE:
2759 ast_log(LOG_WARNING, "Can't send %d type frames with SIP write\n", frame->frametype);
2766 /*! \brief sip_fixup: Fix up a channel: If a channel is consumed, this is called.
2767 Basically update any ->owner links */
2768 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
2770 struct sip_pvt *p = newchan->tech_pvt;
2771 ast_mutex_lock(&p->lock);
2772 if (p->owner != oldchan) {
2773 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
2774 ast_mutex_unlock(&p->lock);
2778 ast_mutex_unlock(&p->lock);
2782 /*! \brief Send DTMF character on SIP channel
2783 within one call, we're able to transmit in many methods simultaneously */
2784 static int sip_senddigit(struct ast_channel *ast, char digit)
2786 struct sip_pvt *p = ast->tech_pvt;
2789 ast_mutex_lock(&p->lock);
2790 switch (ast_test_flag(&p->flags[0], SIP_DTMF)) {
2792 transmit_info_with_digit(p, digit);
2794 case SIP_DTMF_RFC2833:
2796 ast_rtp_senddigit(p->rtp, digit);
2798 case SIP_DTMF_INBAND:
2802 ast_mutex_unlock(&p->lock);
2806 /*! \brief Transfer SIP call */
2807 static int sip_transfer(struct ast_channel *ast, const char *dest)
2809 struct sip_pvt *p = ast->tech_pvt;
2812 ast_mutex_lock(&p->lock);
2813 if (ast->_state == AST_STATE_RING)
2814 res = sip_sipredirect(p, dest);
2816 res = transmit_refer(p, dest);
2817 ast_mutex_unlock(&p->lock);
2821 /*! \brief Play indication to user
2822 * With SIP a lot of indications is sent as messages, letting the device play
2823 the indication - busy signal, congestion etc
2824 \return -1 to force ast_indicate to send indication in audio, 0 if SIP can handle the indication by sending a message
2826 static int sip_indicate(struct ast_channel *ast, int condition)
2828 struct sip_pvt *p = ast->tech_pvt;
2831 ast_mutex_lock(&p->lock);
2833 case AST_CONTROL_RINGING:
2834 if (ast->_state == AST_STATE_RING) {
2835 if (!ast_test_flag(&p->flags[0], SIP_PROGRESS_SENT) ||
2836 (ast_test_flag(&p->flags[0], SIP_PROG_INBAND) == SIP_PROG_INBAND_NEVER)) {
2837 /* Send 180 ringing if out-of-band seems reasonable */
2838 transmit_response(p, "180 Ringing", &p->initreq);
2839 ast_set_flag(&p->flags[0], SIP_RINGING);
2840 if (ast_test_flag(&p->flags[0], SIP_PROG_INBAND) != SIP_PROG_INBAND_YES)
2843 /* Well, if it's not reasonable, just send in-band */
2848 case AST_CONTROL_BUSY:
2849 if (ast->_state != AST_STATE_UP) {
2850 transmit_response(p, "486 Busy Here", &p->initreq);
2851 ast_set_flag(&p->flags[0], SIP_ALREADYGONE);
2852 ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
2857 case AST_CONTROL_CONGESTION:
2858 if (ast->_state != AST_STATE_UP) {
2859 transmit_response(p, "503 Service Unavailable", &p->initreq);
2860 ast_set_flag(&p->flags[0], SIP_ALREADYGONE);
2861 ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
2866 case AST_CONTROL_PROCEEDING:
2867 if ((ast->_state != AST_STATE_UP) &&
2868 !ast_test_flag(&p->flags[0], SIP_PROGRESS_SENT) &&
2869 !ast_test_flag(&p->flags[0], SIP_OUTGOING)) {
2870 transmit_response(p, "100 Trying", &p->initreq);
2875 case AST_CONTROL_PROGRESS:
2876 if ((ast->_state != AST_STATE_UP) &&
2877 !ast_test_flag(&p->flags[0], SIP_PROGRESS_SENT) &&
2878 !ast_test_flag(&p->flags[0], SIP_OUTGOING)) {
2879 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, XMIT_UNRELIABLE);
2880 ast_set_flag(&p->flags[0], SIP_PROGRESS_SENT);
2885 case AST_CONTROL_HOLD: /* The other part of the bridge are put on hold */
2887 ast_log(LOG_DEBUG, "Bridged channel now on hold - %s\n", p->callid);
2890 case AST_CONTROL_UNHOLD: /* The other part of the bridge are back from hold */
2892 ast_log(LOG_DEBUG, "Bridged channel is back from hold, let's talk! : %s\n", p->callid);
2895 case AST_CONTROL_VIDUPDATE: /* Request a video frame update */
2896 if (p->vrtp && !ast_test_flag(&p->flags[0], SIP_NOVIDEO)) {
2897 transmit_info_with_vidupdate(p);
2898 /* ast_rtcp_send_h261fur(p->vrtp); */
2907 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
2911 ast_mutex_unlock(&p->lock);
2917 /*! \brief Initiate a call in the SIP channel
2918 called from sip_request_call (calls from the pbx ) */
2919 static struct ast_channel *sip_new(struct sip_pvt *i, int state, const char *title)
2921 struct ast_channel *tmp;
2922 struct ast_variable *v = NULL;
2926 char iabuf[INET_ADDRSTRLEN];
2927 char peer[MAXHOSTNAMELEN];
2930 ast_mutex_unlock(&i->lock);
2931 /* Don't hold a sip pvt lock while we allocate a channel */
2932 tmp = ast_channel_alloc(1);
2933 ast_mutex_lock(&i->lock);
2935 ast_log(LOG_WARNING, "Unable to allocate SIP channel structure\n");
2938 tmp->tech = &sip_tech;
2939 /* Select our native format based on codec preference until we receive
2940 something from another device to the contrary. */
2941 if (i->jointcapability)
2942 what = i->jointcapability;
2943 else if (i->capability)
2944 what = i->capability;
2946 what = global_capability;
2947 tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
2948 fmt = ast_best_codec(tmp->nativeformats);
2951 ast_string_field_build(tmp, name, "SIP/%s-%04x", title, thread_safe_rand() & 0xffff);
2952 else if (strchr(i->fromdomain,':'))
2953 ast_string_field_build(tmp, name, "SIP/%s-%08x", strchr(i->fromdomain,':')+1, (int)(long)(i));
2955 ast_string_field_build(tmp, name, "SIP/%s-%08x", i->fromdomain, (int)(long)(i));
2957 if (ast_test_flag(&i->flags[0], SIP_DTMF) == SIP_DTMF_INBAND) {
2958 i->vad = ast_dsp_new();
2959 ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
2960 if (global_relaxdtmf)
2961 ast_dsp_digitmode(i->vad, DSP_DIGITMODE_DTMF | DSP_DIGITMODE_RELAXDTMF);
2964 tmp->fds[0] = ast_rtp_fd(i->rtp);
2965 tmp->fds[1] = ast_rtcp_fd(i->rtp);
2968 tmp->fds[2] = ast_rtp_fd(i->vrtp);
2969 tmp->fds[3] = ast_rtcp_fd(i->vrtp);
2971 if (state == AST_STATE_RING)
2973 tmp->adsicpe = AST_ADSI_UNAVAILABLE;
2974 tmp->writeformat = fmt;
2975 tmp->rawwriteformat = fmt;
2976 tmp->readformat = fmt;
2977 tmp->rawreadformat = fmt;
2980 tmp->callgroup = i->callgroup;
2981 tmp->pickupgroup = i->pickupgroup;
2982 tmp->cid.cid_pres = i->callingpres;
2983 if (!ast_strlen_zero(i->accountcode))
2984 ast_string_field_set(tmp, accountcode, i->accountcode);
2986 tmp->amaflags = i->amaflags;
2987 if (!ast_strlen_zero(i->language))
2988 ast_string_field_set(tmp, language, i->language);
2989 if (!ast_strlen_zero(i->musicclass))
2990 ast_string_field_set(tmp, musicclass, i->musicclass);
2992 ast_mutex_lock(&usecnt_lock);
2994 ast_mutex_unlock(&usecnt_lock);
2995 ast_copy_string(tmp->context, i->context, sizeof(tmp->context));
2996 ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
2997 if (!ast_strlen_zero(i->cid_num))
2998 tmp->cid.cid_num = ast_strdup(i->cid_num);
2999 if (!ast_strlen_zero(i->cid_name))
3000 tmp->cid.cid_name = ast_strdup(i->cid_name);
3001 if (!ast_strlen_zero(i->rdnis))
3002 tmp->cid.cid_rdnis = ast_strdup(i->rdnis);
3003 if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
3004 tmp->cid.cid_dnid = ast_strdup(i->exten);
3006 if (!ast_strlen_zero(i->uri)) {
3007 pbx_builtin_setvar_helper(tmp, "SIPURI", i->uri);
3009 if (!ast_strlen_zero(i->domain)) {
3010 pbx_builtin_setvar_helper(tmp, "SIPDOMAIN", i->domain);
3012 if (!ast_strlen_zero(i->useragent)) {
3013 pbx_builtin_setvar_helper(tmp, "SIPUSERAGENT", i->useragent);
3015 if (!ast_strlen_zero(i->callid)) {
3016 pbx_builtin_setvar_helper(tmp, "SIPCALLID", i->callid);
3019 snprintf(peer, sizeof(peer), "[%s]:%d", ast_inet_ntoa(iabuf, sizeof(iabuf), i->sa.sin_addr), ntohs(i->sa.sin_port));
3020 pbx_builtin_setvar_helper(tmp, "OSPPEER", peer);
3022 ast_setstate(tmp, state);
3023 if (state != AST_STATE_DOWN) {
3024 if (ast_pbx_start(tmp)) {
3025 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
3026 tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
3031 /* Set channel variables for this call from configuration */
3032 for (v = i->chanvars ; v ; v = v->next)
3033 pbx_builtin_setvar_helper(tmp,v->name,v->value);
3038 /*! \brief Reads one line of SIP message body */
3039 static char* get_sdp_by_line(char* line, char *name, int nameLen)
3041 if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
3042 return ast_skip_blanks(line + nameLen + 1);
3047 /*! \brief Gets all kind of SIP message bodies, including SDP,
3048 but the name wrongly applies _only_ sdp */
3049 static char *get_sdp(struct sip_request *req, char *name)
3052 int len = strlen(name);
3055 for (x = 0; x < req->lines; x++) {
3056 r = get_sdp_by_line(req->line[x], name, len);
3064 static void sdpLineNum_iterator_init(int* iterator)
3069 static char* get_sdp_iterate(int* iterator,
3070 struct sip_request *req, char *name)
3072 int len = strlen(name);
3075 while (*iterator < req->lines) {
3076 r = get_sdp_by_line(req->line[(*iterator)++], name, len);
3083 static char *find_alias(const char *name, char *_default)
3086 for (x=0;x<sizeof(aliases) / sizeof(aliases[0]); x++)
3087 if (!strcasecmp(aliases[x].fullname, name))
3088 return aliases[x].shortname;
3092 static char *__get_header(struct sip_request *req, const char *name, int *start)
3097 * Technically you can place arbitrary whitespace both before and after the ':' in
3098 * a header, although RFC3261 clearly says you shouldn't before, and place just
3099 * one afterwards. If you shouldn't do it, what absolute idiot decided it was
3100 * a good idea to say you can do it, and if you can do it, why in the hell would.
3101 * you say you shouldn't.
3102 * Anyways, pedanticsipchecking controls whether we allow spaces before ':',
3103 * and we always allow spaces after that for compatibility.
3105 for (pass = 0; name && pass < 2;pass++) {
3106 int x, len = strlen(name);
3107 for (x=*start; x<req->headers; x++) {
3108 if (!strncasecmp(req->header[x], name, len)) {
3109 char *r = req->header[x] + len; /* skip name */
3110 if (pedanticsipchecking)
3111 r = ast_skip_blanks(r);
3115 return ast_skip_blanks(r+1);
3119 if (pass == 0) /* Try aliases */
3120 name = find_alias(name, NULL);
3123 /* Don't return NULL, so get_header is always a valid pointer */
3127 /*! \brief Get header from SIP request */
3128 static char *get_header(struct sip_request *req, const char *name)
3131 return __get_header(req, name, &start);
3134 /*! \brief Read RTP from network */
3135 static struct ast_frame *sip_rtp_read(struct ast_channel *ast, struct sip_pvt *p)
3137 /* Retrieve audio/etc from channel. Assumes p->lock is already held. */
3138 struct ast_frame *f;
3141 /* We have no RTP allocated for this channel */
3142 return &ast_null_frame;
3147 f = ast_rtp_read(p->rtp); /* RTP Audio */
3150 f = ast_rtcp_read(p->rtp); /* RTCP Control Channel */
3153 f = ast_rtp_read(p->vrtp); /* RTP Video */
3156 f = ast_rtcp_read(p->vrtp); /* RTCP Control Channel for video */
3159 f = &ast_null_frame;
3161 /* Don't forward RFC2833 if we're not supposed to */
3162 if (f && (f->frametype == AST_FRAME_DTMF) &&
3163 (ast_test_flag(&p->flags[0], SIP_DTMF) != SIP_DTMF_RFC2833))
3164 return &ast_null_frame;
3167 /* We already hold the channel lock */
3168 if (f->frametype == AST_FRAME_VOICE) {
3169 if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
3171 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
3172 p->owner->nativeformats = (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
3173 ast_set_read_format(p->owner, p->owner->readformat);
3174 ast_set_write_format(p->owner, p->owner->writeformat);
3176 if ((ast_test_flag(&p->flags[0], SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
3177 f = ast_dsp_process(p->owner, p->vad, f);
3178 if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
3179 ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
3186 /*! \brief Read SIP RTP from channel */
3187 static struct ast_frame *sip_read(struct ast_channel *ast)
3189 struct ast_frame *fr;
3190 struct sip_pvt *p = ast->tech_pvt;
3192 ast_mutex_lock(&p->lock);
3193 fr = sip_rtp_read(ast, p);
3194 time(&p->lastrtprx);
3195 ast_mutex_unlock(&p->lock);
3200 /*! \brief Generate 32 byte random string for callid's etc */
3201 static char *generate_random_string(char *buf, size_t size)
3207 val[x] = thread_safe_rand();
3208 snprintf(buf, size, "%08x%08x%08x%08x", val[0], val[1], val[2], val[3]);
3213 /*! \brief Build SIP Call-ID value for a non-REGISTER transaction */
3214 static void build_callid_pvt(struct sip_pvt *pvt)
3216 char iabuf[INET_ADDRSTRLEN];
3219 const char *host = S_OR(pvt->fromdomain, ast_inet_ntoa(iabuf, sizeof(iabuf), pvt->ourip));
3221 ast_string_field_build(pvt, callid, "%s@%s", generate_random_string(buf, sizeof(buf)), host);
3225 /*! \brief Build SIP Call-ID value for a REGISTER transaction */
3226 static void build_callid_registry(struct sip_registry *reg, struct in_addr ourip, const char *fromdomain)
3228 char iabuf[INET_ADDRSTRLEN];
3231 const char *host = S_OR(fromdomain, ast_inet_ntoa(iabuf, sizeof(iabuf), ourip));
3233 ast_string_field_build(reg, callid, "%s@%s", generate_random_string(buf, sizeof(buf)), host);
3236 /*! \brief Make our SIP dialog tag */
3237 static void make_our_tag(char *tagbuf, size_t len)
3239 snprintf(tagbuf, len, "as%08x", thread_safe_rand());
3242 /*! \brief Allocate SIP_PVT structure and set defaults */
3243 static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *sin,
3244 int useglobal_nat, const int intended_method)
3248 if (!(p = ast_calloc(1, sizeof(*p))))
3251 if (ast_string_field_init(p, 512)) {
3256 ast_mutex_init(&p->lock);
3258 p->method = intended_method;
3261 p->subscribed = NONE;
3263 p->prefs = default_prefs; /* Set default codecs for this call */
3265 if (intended_method != SIP_OPTIONS) /* Peerpoke has it's own system */
3266 p->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
3269 p->osptimelimit = 0;
3272 memcpy(&p->sa, sin, sizeof(p->sa));
3273 if (ast_sip_ouraddrfor(&p->sa.sin_addr,&p->ourip))
3274 memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
3276 memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
3279 ast_copy_flags(&p->flags[0], &global_flags[0], SIP_FLAGS_TO_COPY);
3280 ast_copy_flags(&p->flags[1], &global_flags[1], SIP_PAGE2_FLAGS_TO_COPY);
3282 p->branch = thread_safe_rand();
3283 make_our_tag(p->tag, sizeof(p->tag));
3284 /* Start with 101 instead of 1 */
3287 if (sip_methods[intended_method].need_rtp) {
3288 p->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
3289 if (ast_test_flag(&p->flags[1], SIP_PAGE2_VIDEOSUPPORT))
3290 p->vrtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
3291 if (!p->rtp || (ast_test_flag(&p->flags[1], SIP_PAGE2_VIDEOSUPPORT) && !p->vrtp)) {
3292 ast_log(LOG_WARNING, "Unable to create RTP audio %s session: %s\n",
3293 ast_test_flag(&p->flags[1], SIP_PAGE2_VIDEOSUPPORT) ? "and video" : "", strerror(errno));
3294 ast_mutex_destroy(&p->lock);
3296 ast_variables_destroy(p->chanvars);
3302 ast_rtp_settos(p->rtp, global_tos_audio);
3304 ast_rtp_settos(p->vrtp, global_tos_video);
3305 p->rtptimeout = global_rtptimeout;
3306 p->rtpholdtimeout = global_rtpholdtimeout;
3307 p->rtpkeepalive = global_rtpkeepalive;
3308 p->maxcallbitrate = default_maxcallbitrate;
3311 if (useglobal_nat && sin) {
3312 /* Setup NAT structure according to global settings if we have an address */
3313 ast_copy_flags(&p->flags[0], &global_flags[0], SIP_NAT);
3314 memcpy(&p->recv, sin, sizeof(p->recv));
3316 ast_rtp_setnat(p->rtp, ast_test_flag(&p->flags[0], SIP_NAT_ROUTE));
3318 ast_rtp_setnat(p->vrtp, ast_test_flag(&p->flags[0], SIP_NAT_ROUTE));
3321 if (p->method != SIP_REGISTER)
3322 ast_string_field_set(p, fromdomain, default_fromdomain);
3325 build_callid_pvt(p);
3327 ast_string_field_set(p, callid, callid);
3328 /* Assign default music on hold class */
3329 ast_string_field_set(p, musicclass, default_musicclass);
3330 p->capability = global_capability;
3331 if ((ast_test_flag(&p->flags[0], SIP_DTMF) == SIP_DTMF_RFC2833) ||
3332 (ast_test_flag(&p->flags[0], SIP_DTMF) == SIP_DTMF_AUTO))
3333 p->noncodeccapability |= AST_RTP_DTMF;
3334 ast_string_field_set(p, context, default_context);
3336 /* Add to active dialog list */
3337 ast_mutex_lock(&iflock);
3340 ast_mutex_unlock(&iflock);
3342 ast_log(LOG_DEBUG, "Allocating new SIP dialog for %s - %s (%s)\n", callid ? callid : "(No Call-ID)", sip_methods[intended_method].text, p->rtp ? "With RTP" : "No RTP");
3346 /*! \brief Connect incoming SIP message to current dialog or create new dialog structure
3347 Called by handle_request, sipsock_read */
3348 static struct sip_pvt *find_call(struct sip_request *req, struct sockaddr_in *sin, const int intended_method)
3356 callid = get_header(req, "Call-ID");
3358 if (pedanticsipchecking) {
3359 /* In principle Call-ID's uniquely identify a call, but with a forking SIP proxy
3360 we need more to identify a branch - so we have to check branch, from
3361 and to tags to identify a call leg.
3362 For Asterisk to behave correctly, you need to turn on pedanticsipchecking
3365 if (gettag(req, "To", totag, sizeof(totag)))
3366 ast_set_flag(req, SIP_PKT_WITH_TOTAG); /* Used in handle_request/response */
3367 gettag(req, "From", fromtag, sizeof(fromtag));
3369 if (req->method == SIP_RESPONSE)
3375 if (option_debug > 4 )
3376 ast_log(LOG_DEBUG, "= Looking for Call ID: %s (Checking %s) --From tag %s --To-tag %s \n", callid, req->method==SIP_RESPONSE ? "To" : "From", fromtag, totag);
3379 ast_mutex_lock(&iflock);
3381 while(p) { /* In pedantic, we do not want packets with bad syntax to be connected to a PVT */
3383 if (req->method == SIP_REGISTER)
3384 found = (!strcmp(p->callid, callid));
3386 found = (!strcmp(p->callid, callid) &&
3387 (!pedanticsipchecking || !tag || ast_strlen_zero(p->theirtag) || !strcmp(p->theirtag, tag))) ;
3389 if (option_debug > 4)
3390 ast_log(LOG_DEBUG, "= %s Their Call ID: %s Their Tag %s Our tag: %s\n", found ? "Found" : "No match", p->callid, p->theirtag, p->tag);
3392 /* If we get a new request within an existing to-tag - check the to tag as well */
3393 if (pedanticsipchecking && found && req->method != SIP_RESPONSE) { /* SIP Request */
3394 if (p->tag[0] == '\0' && totag[0]) {
3395 /* We have no to tag, but they have. Wrong dialog */
3397 } else if (totag[0]) { /* Both have tags, compare them */
3398 if (strcmp(totag, p->tag)) {
3399 found = FALSE; /* This is not our packet */
3402 if (!found && option_debug > 4)
3403 ast_log(LOG_DEBUG, "= Being pedantic: This is not our match on request: Call ID: %s Ourtag <null> Totag %s Method %s\n", p->callid, totag, sip_methods[req->method].text);
3408 /* Found the call */
3409 ast_mutex_lock(&p->lock);
3410 ast_mutex_unlock(&iflock);
3415 ast_mutex_unlock(&iflock);
3416 p = sip_alloc(callid, sin, 1, intended_method);
3418 ast_mutex_lock(&p->lock);
3422 /*! \brief Parse register=> line in sip.conf and add to registry */
3423 static int sip_register(char *value, int lineno)
3425 struct sip_registry *reg;
3427 char *username=NULL, *hostname=NULL, *secret=NULL, *authuser=NULL;
3434 ast_copy_string(copy, value, sizeof(copy));
3437 hostname = strrchr(stringp, '@');
3442 if (ast_strlen_zero(username) || ast_strlen_zero(hostname)) {
3443 ast_log(LOG_WARNING, "Format for registration is user[:secret[:authuser]]@host[:port][/contact] at line %d\n", lineno);
3447 username = strsep(&stringp, ":");
3449 secret = strsep(&stringp, ":");
3451 authuser = strsep(&stringp, ":");
3454 hostname = strsep(&stringp, "/");
3456 contact = strsep(&stringp, "/");
3457 if (ast_strlen_zero(contact))
3460 hostname = strsep(&stringp, ":");
3461 porta = strsep(&stringp, ":");
3463 if (porta && !atoi(porta)) {
3464 ast_log(LOG_WARNING, "%s is not a valid port number at line %d\n", porta, lineno);
3467 if (!(reg = ast_calloc(1, sizeof(*reg)))) {
3468 ast_log(LOG_ERROR, "Out of memory. Can't allocate SIP registry entry\n");
3472 if (ast_string_field_init(reg, 256)) {
3473 ast_log(LOG_ERROR, "Out of memory. Can't allocate SIP registry strings\n");
3480 ast_string_field_set(reg, contact, contact);
3482 ast_string_field_set(reg, username, username);
3484 ast_string_field_set(reg, hostname, hostname);
3486 ast_string_field_set(reg, authuser, authuser);
3488 ast_string_field_set(reg, secret, secret);
3491 reg->refresh = default_expiry;
3492 reg->portno = porta ? atoi(porta) : 0;
3493 reg->callid_valid = FALSE;
3495 ASTOBJ_CONTAINER_LINK(®l, reg); /* Add the new registry entry to the list */
3496 ASTOBJ_UNREF(reg,sip_registry_destroy);
3500 /*! \brief Parse multiline SIP headers into one header
3501 This is enabled if pedanticsipchecking is enabled */
3502 static int lws2sws(char *msgbuf, int len)