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
35 * \todo VIA branch tag transaction checking
36 * \todo Transaction support
38 * \ingroup channel_drivers
40 * \par Overview of the handling of SIP sessions
41 * The SIP channel handles several types of SIP sessions, or dialogs,
42 * not all of them being "telephone calls".
43 * - Incoming calls that will be sent to the PBX core
44 * - Outgoing calls, generated by the PBX
45 * - SIP subscriptions and notifications of states and voicemail messages
46 * - SIP registrations, both inbound and outbound
47 * - SIP peer management (peerpoke, OPTIONS)
50 * In the SIP channel, there's a list of active SIP dialogs, which includes
51 * all of these when they are active. "sip show channels" in the CLI will
52 * show most of these, excluding subscriptions which are shown by
53 * "sip show subscriptions"
55 * \par incoming packets
56 * Incoming packets are received in the monitoring thread, then handled by
57 * sipsock_read(). This function parses the packet and matches an existing
58 * dialog or starts a new SIP dialog.
60 * sipsock_read sends the packet to handle_request(), that parses a bit more.
61 * if it's a response to an outbound request, it's sent to handle_response().
62 * If it is a request, handle_request sends it to one of a list of functions
63 * depending on the request type - INVITE, OPTIONS, REFER, BYE, CANCEL etc
64 * sipsock_read locks the ast_channel if it exists (an active call) and
65 * unlocks it after we have processed the SIP message.
67 * A new INVITE is sent to handle_request_invite(), that will end up
68 * starting a new channel in the PBX, the new channel after that executing
69 * in a separate channel thread. This is an incoming "call".
70 * When the call is answered, either by a bridged channel or the PBX itself
71 * the sip_answer() function is called.
73 * The actual media - Video or Audio - is mostly handled by the RTP subsystem
77 * Outbound calls are set up by the PBX through the sip_request_call()
78 * function. After that, they are activated by sip_call().
81 * The PBX issues a hangup on both incoming and outgoing calls through
82 * the sip_hangup() function
89 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
95 #include <sys/socket.h>
96 #include <sys/ioctl.h>
103 #include <sys/signal.h>
104 #include <netinet/in.h>
105 #include <netinet/in_systm.h>
106 #include <arpa/inet.h>
107 #include <netinet/ip.h>
110 #include "asterisk/lock.h"
111 #include "asterisk/channel.h"
112 #include "asterisk/config.h"
113 #include "asterisk/logger.h"
114 #include "asterisk/module.h"
115 #include "asterisk/pbx.h"
116 #include "asterisk/options.h"
117 #include "asterisk/lock.h"
118 #include "asterisk/sched.h"
119 #include "asterisk/io.h"
120 #include "asterisk/rtp.h"
121 #include "asterisk/udptl.h"
122 #include "asterisk/acl.h"
123 #include "asterisk/manager.h"
124 #include "asterisk/callerid.h"
125 #include "asterisk/cli.h"
126 #include "asterisk/app.h"
127 #include "asterisk/musiconhold.h"
128 #include "asterisk/dsp.h"
129 #include "asterisk/features.h"
130 #include "asterisk/acl.h"
131 #include "asterisk/srv.h"
132 #include "asterisk/astdb.h"
133 #include "asterisk/causes.h"
134 #include "asterisk/utils.h"
135 #include "asterisk/file.h"
136 #include "asterisk/astobj.h"
137 #include "asterisk/dnsmgr.h"
138 #include "asterisk/devicestate.h"
139 #include "asterisk/linkedlists.h"
140 #include "asterisk/stringfields.h"
141 #include "asterisk/monitor.h"
142 #include "asterisk/localtime.h"
143 #include "asterisk/abstract_jb.h"
144 #include "asterisk/compiler.h"
154 #define VIDEO_CODEC_MASK 0x1fc0000 /*!< Video codecs from H.261 thru AST_FORMAT_MAX_VIDEO */
155 #ifndef IPTOS_MINCOST
156 #define IPTOS_MINCOST 0x02
159 /* #define VOCAL_DATA_HACK */
161 #define DEFAULT_DEFAULT_EXPIRY 120
162 #define DEFAULT_MIN_EXPIRY 60
163 #define DEFAULT_MAX_EXPIRY 3600
164 #define DEFAULT_REGISTRATION_TIMEOUT 20
165 #define DEFAULT_MAX_FORWARDS "70"
167 /* guard limit must be larger than guard secs */
168 /* guard min must be < 1000, and should be >= 250 */
169 #define EXPIRY_GUARD_SECS 15 /*!< How long before expiry do we reregister */
170 #define EXPIRY_GUARD_LIMIT 30 /*!< Below here, we use EXPIRY_GUARD_PCT instead of
172 #define EXPIRY_GUARD_MIN 500 /*!< This is the minimum guard time applied. If
173 GUARD_PCT turns out to be lower than this, it
174 will use this time instead.
175 This is in milliseconds. */
176 #define EXPIRY_GUARD_PCT 0.20 /*!< Percentage of expires timeout to use when
177 below EXPIRY_GUARD_LIMIT */
178 #define DEFAULT_EXPIRY 900 /*!< Expire slowly */
180 static int min_expiry = DEFAULT_MIN_EXPIRY; /*!< Minimum accepted registration time */
181 static int max_expiry = DEFAULT_MAX_EXPIRY; /*!< Maximum accepted registration time */
182 static int default_expiry = DEFAULT_DEFAULT_EXPIRY;
183 static int expiry = DEFAULT_EXPIRY;
186 #define MAX(a,b) ((a) > (b) ? (a) : (b))
189 #define CALLERID_UNKNOWN "Unknown"
191 #define DEFAULT_MAXMS 2000 /*!< Qualification: Must be faster than 2 seconds by default */
192 #define DEFAULT_FREQ_OK 60 * 1000 /*!< Qualification: How often to check for the host to be up */
193 #define DEFAULT_FREQ_NOTOK 10 * 1000 /*!< Qualification: How often to check, if the host is down... */
195 #define DEFAULT_RETRANS 1000 /*!< How frequently to retransmit Default: 2 * 500 ms in RFC 3261 */
196 #define MAX_RETRANS 6 /*!< Try only 6 times for retransmissions, a total of 7 transmissions */
197 #define SIP_TRANS_TIMEOUT 32000 /*!< SIP request timeout (rfc 3261) 64*T1
198 \todo Use known T1 for timeout (peerpoke)
200 #define MAX_AUTHTRIES 3 /*!< Try authentication three times, then fail */
202 #define SIP_MAX_HEADERS 64 /*!< Max amount of SIP headers to read */
203 #define SIP_MAX_LINES 64 /*!< Max amount of lines in SIP attachment (like SDP) */
204 #define SIP_MAX_PACKET 4096 /*!< Also from RFC 3261 (2543), should sub headers tho */
206 #define INITIAL_CSEQ 101 /*!< our initial sip sequence number */
208 /*! \brief Global jitterbuffer configuration - by default, jb is disabled */
209 static struct ast_jb_conf default_jbconf =
213 .resync_threshold = -1,
216 static struct ast_jb_conf global_jbconf;
218 static const char tdesc[] = "Session Initiation Protocol (SIP)";
219 static const char config[] = "sip.conf";
220 static const char notify_config[] = "sip_notify.conf";
221 static int usecnt = 0;
227 /*! \brief Authorization scheme for call transfers
228 \note Not a bitfield flag, since there are plans for other modes,
229 like "only allow transfers for authenticated devices" */
231 TRANSFER_OPENFORALL, /*!< Allow all SIP transfers */
232 TRANSFER_CLOSED, /*!< Allow no SIP transfers */
241 /* Do _NOT_ make any changes to this enum, or the array following it;
242 if you think you are doing the right thing, you are probably
243 not doing the right thing. If you think there are changes
244 needed, get someone else to review them first _before_
245 submitting a patch. If these two lists do not match properly
246 bad things will happen.
250 XMIT_CRITICAL = 2, /*!< Transmit critical SIP message reliably, with re-transmits.
251 If it fails, it's critical and will cause a teardown of the session */
252 XMIT_RELIABLE = 1, /*!< Transmit SIP message reliably, with re-transmits */
253 XMIT_UNRELIABLE = 0, /*!< Transmit SIP message without bothering with re-transmits */
256 enum parse_register_result {
257 PARSE_REGISTER_FAILED,
258 PARSE_REGISTER_UPDATE,
259 PARSE_REGISTER_QUERY,
262 enum subscriptiontype {
272 static const struct cfsubscription_types {
273 enum subscriptiontype type;
274 const char * const event;
275 const char * const mediatype;
276 const char * const text;
277 } subscription_types[] = {
278 { NONE, "-", "unknown", "unknown" },
279 /* RFC 4235: SIP Dialog event package */
280 { DIALOG_INFO_XML, "dialog", "application/dialog-info+xml", "dialog-info+xml" },
281 { CPIM_PIDF_XML, "presence", "application/cpim-pidf+xml", "cpim-pidf+xml" }, /* RFC 3863 */
282 { PIDF_XML, "presence", "application/pidf+xml", "pidf+xml" }, /* RFC 3863 */
283 { XPIDF_XML, "presence", "application/xpidf+xml", "xpidf+xml" }, /* Pre-RFC 3863 with MS additions */
284 { MWI_NOTIFICATION, "message-summary", "application/simple-message-summary", "mwi" } /* RFC 3842: Mailbox notification */
287 /*! \brief SIP Request methods known by Asterisk */
289 SIP_UNKNOWN, /* Unknown response */
290 SIP_RESPONSE, /* Not request, response to outbound request */
296 SIP_PRACK, /* Not supported at all */
301 SIP_UPDATE, /* We can send UPDATE; but not accept it */
304 SIP_PUBLISH, /* Not supported at all */
307 /*! \brief Authentication types - proxy or www authentication
308 \note Endpoints, like Asterisk, should always use WWW authentication to
309 allow multiple authentications in the same call - to the proxy and
317 /*! \brief Authentication result from check_auth* functions */
318 enum check_auth_result {
320 AUTH_CHALLENGE_SENT = 1,
321 AUTH_SECRET_FAILED = -1,
322 AUTH_USERNAME_MISMATCH = -2,
325 AUTH_UNKNOWN_DOMAIN = -5,
328 /* States for outbound registrations (with register= lines in sip.conf */
329 enum sipregistrystate {
330 REG_STATE_UNREGISTERED = 0, /*!< We are not registred */
331 REG_STATE_REGSENT, /*!< Registration request sent */
332 REG_STATE_AUTHSENT, /*!< We have tried to authenticate */
333 REG_STATE_REGISTERED, /*!< Registred and done */
334 REG_STATE_REJECTED, /*!< Registration rejected */
335 REG_STATE_TIMEOUT, /*!< Registration timed out */
336 REG_STATE_NOAUTH, /*!< We have no accepted credentials */
337 REG_STATE_FAILED, /*!< Registration failed after several tries */
341 /*! XXX Note that sip_methods[i].id == i must hold or the code breaks */
342 static const struct cfsip_methods {
344 int need_rtp; /*!< when this is the 'primary' use for a pvt structure, does it need RTP? */
347 { SIP_UNKNOWN, RTP, "-UNKNOWN-" },
348 { SIP_RESPONSE, NO_RTP, "SIP/2.0" },
349 { SIP_REGISTER, NO_RTP, "REGISTER" },
350 { SIP_OPTIONS, NO_RTP, "OPTIONS" },
351 { SIP_NOTIFY, NO_RTP, "NOTIFY" },
352 { SIP_INVITE, RTP, "INVITE" },
353 { SIP_ACK, NO_RTP, "ACK" },
354 { SIP_PRACK, NO_RTP, "PRACK" },
355 { SIP_BYE, NO_RTP, "BYE" },
356 { SIP_REFER, NO_RTP, "REFER" },
357 { SIP_SUBSCRIBE, NO_RTP, "SUBSCRIBE" },
358 { SIP_MESSAGE, NO_RTP, "MESSAGE" },
359 { SIP_UPDATE, NO_RTP, "UPDATE" },
360 { SIP_INFO, NO_RTP, "INFO" },
361 { SIP_CANCEL, NO_RTP, "CANCEL" },
362 { SIP_PUBLISH, NO_RTP, "PUBLISH" }
365 /*! Define SIP option tags, used in Require: and Supported: headers
366 We need to be aware of these properties in the phones to use
367 the replace: header. We should not do that without knowing
368 that the other end supports it...
369 This is nothing we can configure, we learn by the dialog
370 Supported: header on the REGISTER (peer) or the INVITE
372 We are not using many of these today, but will in the future.
373 This is documented in RFC 3261
376 #define NOT_SUPPORTED 0
378 #define SIP_OPT_REPLACES (1 << 0)
379 #define SIP_OPT_100REL (1 << 1)
380 #define SIP_OPT_TIMER (1 << 2)
381 #define SIP_OPT_EARLY_SESSION (1 << 3)
382 #define SIP_OPT_JOIN (1 << 4)
383 #define SIP_OPT_PATH (1 << 5)
384 #define SIP_OPT_PREF (1 << 6)
385 #define SIP_OPT_PRECONDITION (1 << 7)
386 #define SIP_OPT_PRIVACY (1 << 8)
387 #define SIP_OPT_SDP_ANAT (1 << 9)
388 #define SIP_OPT_SEC_AGREE (1 << 10)
389 #define SIP_OPT_EVENTLIST (1 << 11)
390 #define SIP_OPT_GRUU (1 << 12)
391 #define SIP_OPT_TARGET_DIALOG (1 << 13)
392 #define SIP_OPT_NOREFERSUB (1 << 14)
393 #define SIP_OPT_HISTINFO (1 << 15)
394 #define SIP_OPT_RESPRIORITY (1 << 16)
396 /*! \brief List of well-known SIP options. If we get this in a require,
397 we should check the list and answer accordingly. */
398 static const struct cfsip_options {
399 int id; /*!< Bitmap ID */
400 int supported; /*!< Supported by Asterisk ? */
401 char * const text; /*!< Text id, as in standard */
402 } sip_options[] = { /* XXX used in 3 places */
403 /* RFC3891: Replaces: header for transfer */
404 { SIP_OPT_REPLACES, SUPPORTED, "replaces" },
405 /* One version of Polycom firmware has the wrong label */
406 { SIP_OPT_REPLACES, SUPPORTED, "replace" },
407 /* RFC3262: PRACK 100% reliability */
408 { SIP_OPT_100REL, NOT_SUPPORTED, "100rel" },
409 /* RFC4028: SIP Session Timers */
410 { SIP_OPT_TIMER, NOT_SUPPORTED, "timer" },
411 /* RFC3959: SIP Early session support */
412 { SIP_OPT_EARLY_SESSION, NOT_SUPPORTED, "early-session" },
413 /* RFC3911: SIP Join header support */
414 { SIP_OPT_JOIN, NOT_SUPPORTED, "join" },
415 /* RFC3327: Path support */
416 { SIP_OPT_PATH, NOT_SUPPORTED, "path" },
417 /* RFC3840: Callee preferences */
418 { SIP_OPT_PREF, NOT_SUPPORTED, "pref" },
419 /* RFC3312: Precondition support */
420 { SIP_OPT_PRECONDITION, NOT_SUPPORTED, "precondition" },
421 /* RFC3323: Privacy with proxies*/
422 { SIP_OPT_PRIVACY, NOT_SUPPORTED, "privacy" },
423 /* RFC4092: Usage of the SDP ANAT Semantics in the SIP */
424 { SIP_OPT_SDP_ANAT, NOT_SUPPORTED, "sdp-anat" },
425 /* RFC3329: Security agreement mechanism */
426 { SIP_OPT_SEC_AGREE, NOT_SUPPORTED, "sec_agree" },
427 /* SIMPLE events: draft-ietf-simple-event-list-07.txt */
428 { SIP_OPT_EVENTLIST, NOT_SUPPORTED, "eventlist" },
429 /* GRUU: Globally Routable User Agent URI's */
430 { SIP_OPT_GRUU, NOT_SUPPORTED, "gruu" },
431 /* Target-dialog: draft-ietf-sip-target-dialog-03.txt */
432 { SIP_OPT_TARGET_DIALOG,NOT_SUPPORTED, "tdialog" },
433 /* Disable the REFER subscription, RFC 4488 */
434 { SIP_OPT_NOREFERSUB, NOT_SUPPORTED, "norefersub" },
435 /* ietf-sip-history-info-06.txt */
436 { SIP_OPT_HISTINFO, NOT_SUPPORTED, "histinfo" },
437 /* ietf-sip-resource-priority-10.txt */
438 { SIP_OPT_RESPRIORITY, NOT_SUPPORTED, "resource-priority" },
442 /*! \brief SIP Methods we support */
443 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY"
445 /*! \brief SIP Extensions we support */
446 #define SUPPORTED_EXTENSIONS "replaces"
449 /* Default values, set and reset in reload_config before reading configuration */
450 /* These are default values in the source. There are other recommended values in the
451 sip.conf.sample for new installations. These may differ to keep backwards compatibility,
452 yet encouraging new behaviour on new installations
454 #define DEFAULT_SIP_PORT 5060 /*!< From RFC 3261 (former 2543) */
455 #define DEFAULT_CONTEXT "default"
456 #define DEFAULT_MOHINTERPRET "default"
457 #define DEFAULT_MOHSUGGEST ""
458 #define DEFAULT_VMEXTEN "asterisk"
459 #define DEFAULT_CALLERID "asterisk"
460 #define DEFAULT_NOTIFYMIME "application/simple-message-summary"
461 #define DEFAULT_MWITIME 10
462 #define DEFAULT_ALLOWGUEST TRUE
463 #define DEFAULT_SRVLOOKUP FALSE /*!< Recommended setting is ON */
464 #define DEFAULT_COMPACTHEADERS FALSE
465 #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. */
466 #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. */
467 #define DEFAULT_TOS_VIDEO 0 /*!< Video packets should be marked as DSCP AF41, but the default is 0 to be compatible with previous versions. */
468 #define DEFAULT_ALLOW_EXT_DOM TRUE
469 #define DEFAULT_REALM "asterisk"
470 #define DEFAULT_NOTIFYRINGING TRUE
471 #define DEFAULT_PEDANTIC FALSE
472 #define DEFAULT_AUTOCREATEPEER FALSE
473 #define DEFAULT_QUALIFY FALSE
474 #define DEFAULT_T1MIN 100 /*!< 100 MS for minimal roundtrip time */
475 #define DEFAULT_MAX_CALL_BITRATE (384) /*!< Max bitrate for video */
476 #ifndef DEFAULT_USERAGENT
477 #define DEFAULT_USERAGENT "Asterisk PBX" /*!< Default Useragent: header unless re-defined in sip.conf */
481 /* Default setttings are used as a channel setting and as a default when
482 configuring devices */
483 static char default_context[AST_MAX_CONTEXT];
484 static char default_subscribecontext[AST_MAX_CONTEXT];
485 static char default_language[MAX_LANGUAGE];
486 static char default_callerid[AST_MAX_EXTENSION];
487 static char default_fromdomain[AST_MAX_EXTENSION];
488 static char default_notifymime[AST_MAX_EXTENSION];
489 static int default_qualify; /*!< Default Qualify= setting */
490 static char default_vmexten[AST_MAX_EXTENSION];
491 static char default_mohinterpret[MAX_MUSICCLASS]; /*!< Global setting for moh class to use when put on hold */
492 static char default_mohsuggest[MAX_MUSICCLASS]; /*!< Global setting for moh class to suggest when putting
493 * a bridged channel on hold */
494 static int default_maxcallbitrate; /*!< Maximum bitrate for call */
495 static struct ast_codec_pref default_prefs; /*!< Default codec prefs */
497 /* Global settings only apply to the channel */
498 static int global_rtautoclear;
499 static int global_notifyringing; /*!< Send notifications on ringing */
500 static int global_alwaysauthreject; /*!< Send 401 Unauthorized for all failing requests */
501 static int srvlookup; /*!< SRV Lookup on or off. Default is off, RFC behavior is on */
502 static int pedanticsipchecking; /*!< Extra checking ? Default off */
503 static int autocreatepeer; /*!< Auto creation of peers at registration? Default off. */
504 static int global_relaxdtmf; /*!< Relax DTMF */
505 static int global_rtptimeout; /*!< Time out call if no RTP */
506 static int global_rtpholdtimeout;
507 static int global_rtpkeepalive; /*!< Send RTP keepalives */
508 static int global_reg_timeout;
509 static int global_regattempts_max; /*!< Registration attempts before giving up */
510 static int global_allowguest; /*!< allow unauthenticated users/peers to connect? */
511 static int global_allowsubscribe; /*!< Flag for disabling ALL subscriptions, this is FALSE only if all peers are FALSE
512 the global setting is in globals_flags[1] */
513 static int global_mwitime; /*!< Time between MWI checks for peers */
514 static unsigned int global_tos_sip; /*!< IP type of service for SIP packets */
515 static unsigned int global_tos_audio; /*!< IP type of service for audio RTP packets */
516 static unsigned int global_tos_video; /*!< IP type of service for video RTP packets */
517 static int compactheaders; /*!< send compact sip headers */
518 static int recordhistory; /*!< Record SIP history. Off by default */
519 static int dumphistory; /*!< Dump history to verbose before destroying SIP dialog */
520 static char global_realm[MAXHOSTNAMELEN]; /*!< Default realm */
521 static char global_regcontext[AST_MAX_CONTEXT]; /*!< Context for auto-extensions */
522 static char global_useragent[AST_MAX_EXTENSION]; /*!< Useragent for the SIP channel */
523 static int allow_external_domains; /*!< Accept calls to external SIP domains? */
524 static int global_callevents; /*!< Whether we send manager events or not */
525 static int global_t1min; /*!< T1 roundtrip time minimum */
526 static enum transfermodes global_allowtransfer; /*!< SIP Refer restriction scheme */
528 /*! \brief Codecs that we support by default: */
529 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
530 static int noncodeccapability = AST_RTP_DTMF;
532 /* Object counters */
533 static int suserobjs = 0; /*!< Static users */
534 static int ruserobjs = 0; /*!< Realtime users */
535 static int speerobjs = 0; /*!< Statis peers */
536 static int rpeerobjs = 0; /*!< Realtime peers */
537 static int apeerobjs = 0; /*!< Autocreated peer objects */
538 static int regobjs = 0; /*!< Registry objects */
540 static struct ast_flags global_flags[2] = {{0}}; /*!< global SIP_ flags */
542 /*! \brief Protect the SIP dialog list (of sip_pvt's) */
543 AST_MUTEX_DEFINE_STATIC(iflock);
545 /*! \brief Protect the monitoring thread, so only one process can kill or start it, and not
546 when it's doing something critical. */
547 AST_MUTEX_DEFINE_STATIC(netlock);
549 AST_MUTEX_DEFINE_STATIC(monlock);
551 AST_MUTEX_DEFINE_STATIC(sip_reload_lock);
553 /*! \brief This is the thread for the monitor which checks for input on the channels
554 which are not currently in use. */
555 static pthread_t monitor_thread = AST_PTHREADT_NULL;
557 static int sip_reloading = FALSE; /*!< Flag for avoiding multiple reloads at the same time */
558 static enum channelreloadreason sip_reloadreason; /*!< Reason for last reload/load of configuration */
560 static struct sched_context *sched; /*!< The scheduling context */
561 static struct io_context *io; /*!< The IO context */
563 #define DEC_CALL_LIMIT 0
564 #define INC_CALL_LIMIT 1
565 #define DEC_CALL_RINGING 2
566 #define INC_CALL_RINGING 3
568 /*! \brief sip_request: The data grabbed from the UDP socket */
570 char *rlPart1; /*!< SIP Method Name or "SIP/2.0" protocol version */
571 char *rlPart2; /*!< The Request URI or Response Status */
572 int len; /*!< Length */
573 int headers; /*!< # of SIP Headers */
574 int method; /*!< Method of this request */
575 int lines; /*!< Body Content */
576 unsigned int flags; /*!< SIP_PKT Flags for this packet */
577 char *header[SIP_MAX_HEADERS];
578 char *line[SIP_MAX_LINES];
579 char data[SIP_MAX_PACKET];
580 unsigned int sdp_start; /*!< the line number where the SDP begins */
581 unsigned int sdp_end; /*!< the line number where the SDP ends */
585 * A sip packet is stored into the data[] buffer, with the header followed
586 * by an empty line and the body of the message.
587 * On outgoing packets, data is accumulated in data[] with len reflecting
588 * the next available byte, headers and lines count the number of lines
589 * in both parts. There are no '\0' in data[0..len-1].
591 * On received packet, the input read from the socket is copied into data[],
592 * len is set and the string is NUL-terminated. Then a parser fills up
593 * the other fields -header[] and line[] to point to the lines of the
594 * message, rlPart1 and rlPart2 parse the first lnie as below:
596 * Requests have in the first line METHOD URI SIP/2.0
597 * rlPart1 = method; rlPart2 = uri;
598 * Responses have in the first line SIP/2.0 code description
599 * rlPart1 = SIP/2.0; rlPart2 = code + description;
603 /*! \brief structure used in transfers */
605 struct ast_channel *chan1; /*!< First channel involved */
606 struct ast_channel *chan2; /*!< Second channel involved */
607 struct sip_request req; /*!< Request that caused the transfer (REFER) */
608 int seqno; /*!< Sequence number */
613 /*! \brief Parameters to the transmit_invite function */
614 struct sip_invite_param {
615 const char *distinctive_ring; /*!< Distinctive ring header */
616 int addsipheaders; /*!< Add extra SIP headers */
617 const char *uri_options; /*!< URI options to add to the URI */
618 const char *vxml_url; /*!< VXML url for Cisco phones */
619 char *auth; /*!< Authentication */
620 char *authheader; /*!< Auth header */
621 enum sip_auth_type auth_type; /*!< Authentication type */
622 const char *replaces; /*!< Replaces header for call transfers */
623 int transfer; /*!< Flag - is this Invite part of a SIP transfer? (invite/replaces) */
626 /*! \brief Structure to save routing information for a SIP session */
628 struct sip_route *next;
632 /*! \brief Modes for SIP domain handling in the PBX */
634 SIP_DOMAIN_AUTO, /*!< This domain is auto-configured */
635 SIP_DOMAIN_CONFIG, /*!< This domain is from configuration */
639 char domain[MAXHOSTNAMELEN]; /*!< SIP domain we are responsible for */
640 char context[AST_MAX_EXTENSION]; /*!< Incoming context for this domain */
641 enum domain_mode mode; /*!< How did we find this domain? */
642 AST_LIST_ENTRY(domain) list; /*!< List mechanics */
645 static AST_LIST_HEAD_STATIC(domain_list, domain); /*!< The SIP domain list */
648 /*! \brief sip_history: Structure for saving transactions within a SIP dialog */
650 AST_LIST_ENTRY(sip_history) list;
651 char event[0]; /* actually more, depending on needs */
654 AST_LIST_HEAD_NOLOCK(sip_history_head, sip_history); /*!< history list, entry in sip_pvt */
656 /*! \brief sip_auth: Creadentials for authentication to other SIP services */
658 char realm[AST_MAX_EXTENSION]; /*!< Realm in which these credentials are valid */
659 char username[256]; /*!< Username */
660 char secret[256]; /*!< Secret */
661 char md5secret[256]; /*!< MD5Secret */
662 struct sip_auth *next; /*!< Next auth structure in list */
665 /*--- Various flags for the flags field in the pvt structure */
666 #define SIP_ALREADYGONE (1 << 0) /*!< Whether or not we've already been destroyed by our peer */
667 #define SIP_NEEDDESTROY (1 << 1) /*!< if we need to be destroyed by the monitor thread */
668 #define SIP_NOVIDEO (1 << 2) /*!< Didn't get video in invite, don't offer */
669 #define SIP_RINGING (1 << 3) /*!< Have sent 180 ringing */
670 #define SIP_PROGRESS_SENT (1 << 4) /*!< Have sent 183 message progress */
671 #define SIP_NEEDREINVITE (1 << 5) /*!< Do we need to send another reinvite? */
672 #define SIP_PENDINGBYE (1 << 6) /*!< Need to send bye after we ack? */
673 #define SIP_GOTREFER (1 << 7) /*!< Got a refer? */
674 #define SIP_PROMISCREDIR (1 << 8) /*!< Promiscuous redirection */
675 #define SIP_TRUSTRPID (1 << 9) /*!< Trust RPID headers? */
676 #define SIP_USEREQPHONE (1 << 10) /*!< Add user=phone to numeric URI. Default off */
677 #define SIP_REALTIME (1 << 11) /*!< Flag for realtime users */
678 #define SIP_USECLIENTCODE (1 << 12) /*!< Trust X-ClientCode info message */
679 #define SIP_OUTGOING (1 << 13) /*!< Is this an outgoing call? */
680 #define SIP_CAN_BYE (1 << 14) /*!< Can we send BYE on this dialog? */
681 #define SIP_DEFER_BYE_ON_TRANSFER (1 << 15) /*!< Do not hangup at first ast_hangup */
682 #define SIP_DTMF (3 << 16) /*!< DTMF Support: four settings, uses two bits */
683 #define SIP_DTMF_RFC2833 (0 << 16) /*!< DTMF Support: RTP DTMF - "rfc2833" */
684 #define SIP_DTMF_INBAND (1 << 16) /*!< DTMF Support: Inband audio, only for ULAW/ALAW - "inband" */
685 #define SIP_DTMF_INFO (2 << 16) /*!< DTMF Support: SIP Info messages - "info" */
686 #define SIP_DTMF_AUTO (3 << 16) /*!< DTMF Support: AUTO switch between rfc2833 and in-band DTMF */
688 #define SIP_NAT (3 << 18) /*!< four settings, uses two bits */
689 #define SIP_NAT_NEVER (0 << 18) /*!< No nat support */
690 #define SIP_NAT_RFC3581 (1 << 18) /*!< NAT RFC3581 */
691 #define SIP_NAT_ROUTE (2 << 18) /*!< NAT Only ROUTE */
692 #define SIP_NAT_ALWAYS (3 << 18) /*!< NAT Both ROUTE and RFC3581 */
693 /* re-INVITE related settings */
694 #define SIP_REINVITE (7 << 20) /*!< three bits used */
695 #define SIP_CAN_REINVITE (1 << 20) /*!< allow peers to be reinvited to send media directly p2p */
696 #define SIP_CAN_REINVITE_NAT (2 << 20) /*!< allow media reinvite when new peer is behind NAT */
697 #define SIP_REINVITE_UPDATE (4 << 20) /*!< use UPDATE (RFC3311) when reinviting this peer */
698 /* "insecure" settings */
699 #define SIP_INSECURE_PORT (1 << 23) /*!< don't require matching port for incoming requests */
700 #define SIP_INSECURE_INVITE (1 << 24) /*!< don't require authentication for incoming INVITEs */
701 /* Sending PROGRESS in-band settings */
702 #define SIP_PROG_INBAND (3 << 25) /*!< three settings, uses two bits */
703 #define SIP_PROG_INBAND_NEVER (0 << 25)
704 #define SIP_PROG_INBAND_NO (1 << 25)
705 #define SIP_PROG_INBAND_YES (2 << 25)
706 #define SIP_FREE_BIT (1 << 27) /*!< Undefined bit - not in use */
707 #define SIP_CALL_LIMIT (1 << 28) /*!< Call limit enforced for this call */
708 #define SIP_SENDRPID (1 << 29) /*!< Remote Party-ID Support */
709 #define SIP_INC_COUNT (1 << 30) /*!< Did this connection increment the counter of in-use calls? */
710 #define SIP_G726_NONSTANDARD (1 << 31) /*!< Use non-standard packing for G726-32 data */
712 #define SIP_FLAGS_TO_COPY \
713 (SIP_PROMISCREDIR | SIP_TRUSTRPID | SIP_SENDRPID | SIP_DTMF | SIP_REINVITE | \
714 SIP_PROG_INBAND | SIP_USECLIENTCODE | SIP_NAT | SIP_G726_NONSTANDARD | \
715 SIP_USEREQPHONE | SIP_INSECURE_PORT | SIP_INSECURE_INVITE)
717 /* a new page of flags */
719 #define SIP_PAGE2_RTCACHEFRIENDS (1 << 0)
720 #define SIP_PAGE2_RTUPDATE (1 << 1)
721 #define SIP_PAGE2_RTAUTOCLEAR (1 << 2)
722 #define SIP_PAGE2_RT_FROMCONTACT (1 << 4)
723 #define SIP_PAGE2_RTSAVE_SYSNAME (1 << 5)
724 /* Space for addition of other realtime flags in the future */
725 #define SIP_PAGE2_IGNOREREGEXPIRE (1 << 10)
726 #define SIP_PAGE2_DEBUG (3 << 11)
727 #define SIP_PAGE2_DEBUG_CONFIG (1 << 11)
728 #define SIP_PAGE2_DEBUG_CONSOLE (1 << 12)
729 #define SIP_PAGE2_DYNAMIC (1 << 13) /*!< Dynamic Peers register with Asterisk */
730 #define SIP_PAGE2_SELFDESTRUCT (1 << 14) /*!< Automatic peers need to destruct themselves */
731 #define SIP_PAGE2_VIDEOSUPPORT (1 << 15)
732 #define SIP_PAGE2_ALLOWSUBSCRIBE (1 << 16) /*!< Allow subscriptions from this peer? */
733 #define SIP_PAGE2_ALLOWOVERLAP (1 << 17) /*!< Allow overlap dialing ? */
734 #define SIP_PAGE2_SUBSCRIBEMWIONLY (1 << 18) /*!< Only issue MWI notification if subscribed to */
735 #define SIP_PAGE2_INC_RINGING (1 << 19) /*!< Did this connection increment the counter of in-use calls? */
736 #define SIP_PAGE2_T38SUPPORT (7 << 20) /*!< T38 Fax Passthrough Support */
737 #define SIP_PAGE2_T38SUPPORT_UDPTL (1 << 20) /*!< 20: T38 Fax Passthrough Support */
738 #define SIP_PAGE2_T38SUPPORT_RTP (2 << 20) /*!< 21: T38 Fax Passthrough Support */
739 #define SIP_PAGE2_T38SUPPORT_TCP (4 << 20) /*!< 22: T38 Fax Passthrough Support */
740 #define SIP_PAGE2_CALL_ONHOLD (3 << 23) /*!< Call states */
741 #define SIP_PAGE2_CALL_ONHOLD_ONEDIR (1 << 23) /*!< 23: One directional hold */
742 #define SIP_PAGE2_CALL_ONHOLD_INACTIVE (2 << 24) /*!< 24: Inactive */
744 #define SIP_PAGE2_FLAGS_TO_COPY \
745 (SIP_PAGE2_ALLOWSUBSCRIBE | SIP_PAGE2_ALLOWOVERLAP | SIP_PAGE2_VIDEOSUPPORT | SIP_PAGE2_T38SUPPORT)
747 /* SIP packet flags */
748 #define SIP_PKT_DEBUG (1 << 0) /*!< Debug this packet */
749 #define SIP_PKT_WITH_TOTAG (1 << 1) /*!< This packet has a to-tag */
750 #define SIP_PKT_IGNORE (1 << 2) /*!< This is a re-transmit, ignore it */
751 #define SIP_PKT_IGNORE_RESP (1 << 3) /*!< Resp ignore - ??? */
752 #define SIP_PKT_IGNORE_REQ (1 << 4) /*!< Req ignore - ??? */
754 /* T.38 set of flags */
755 #define T38FAX_FILL_BIT_REMOVAL (1 << 0) /*!< Default: 0 (unset)*/
756 #define T38FAX_TRANSCODING_MMR (1 << 1) /*!< Default: 0 (unset)*/
757 #define T38FAX_TRANSCODING_JBIG (1 << 2) /*!< Default: 0 (unset)*/
758 /* Rate management */
759 #define T38FAX_RATE_MANAGEMENT_TRANSFERED_TCF (0 << 3)
760 #define T38FAX_RATE_MANAGEMENT_LOCAL_TCF (1 << 3) /*!< Unset for transferredTCF (UDPTL), set for localTCF (TPKT) */
761 /* UDP Error correction */
762 #define T38FAX_UDP_EC_NONE (0 << 4) /*!< two bits, if unset NO t38UDPEC field in T38 SDP*/
763 #define T38FAX_UDP_EC_FEC (1 << 4) /*!< Set for t38UDPFEC */
764 #define T38FAX_UDP_EC_REDUNDANCY (2 << 4) /*!< Set for t38UDPRedundancy */
765 /* T38 Spec version */
766 #define T38FAX_VERSION (3 << 6) /*!< two bits, 2 values so far, up to 4 values max */
767 #define T38FAX_VERSION_0 (0 << 6) /*!< Version 0 */
768 #define T38FAX_VERSION_1 (1 << 6) /*!< Version 1 */
769 /* Maximum Fax Rate */
770 #define T38FAX_RATE_2400 (1 << 8) /*!< 2400 bps t38FaxRate */
771 #define T38FAX_RATE_4800 (1 << 9) /*!< 4800 bps t38FaxRate */
772 #define T38FAX_RATE_7200 (1 << 10) /*!< 7200 bps t38FaxRate */
773 #define T38FAX_RATE_9600 (1 << 11) /*!< 9600 bps t38FaxRate */
774 #define T38FAX_RATE_12000 (1 << 12) /*!< 12000 bps t38FaxRate */
775 #define T38FAX_RATE_14400 (1 << 13) /*!< 14400 bps t38FaxRate */
777 /*!< This is default: NO MMR and JBIG trancoding, NO fill bit removal, transferredTCF TCF, UDP FEC, Version 0 and 9600 max fax rate */
778 static int global_t38_capability = T38FAX_VERSION_0 | T38FAX_RATE_2400 | T38FAX_RATE_4800 | T38FAX_RATE_7200 | T38FAX_RATE_9600;
780 #define sipdebug ast_test_flag(&global_flags[1], SIP_PAGE2_DEBUG)
781 #define sipdebug_config ast_test_flag(&global_flags[1], SIP_PAGE2_DEBUG_CONFIG)
782 #define sipdebug_console ast_test_flag(&global_flags[1], SIP_PAGE2_DEBUG_CONSOLE)
784 /*! \brief T38 States for a call */
786 T38_DISABLED = 0, /*! Not enabled */
787 T38_LOCAL_DIRECT, /*! Offered from local */
788 T38_LOCAL_REINVITE, /*! Offered from local - REINVITE */
789 T38_PEER_DIRECT, /*! Offered from peer */
790 T38_PEER_REINVITE, /*! Offered from peer - REINVITE */
791 T38_ENABLED /*! Negotiated (enabled) */
794 /*! \brief T.38 channel settings (at some point we need to make this alloc'ed */
795 struct t38properties {
796 struct ast_flags t38support; /*!< Flag for udptl, rtp or tcp support for this session */
797 int capability; /*!< Our T38 capability */
798 int peercapability; /*!< Peers T38 capability */
799 int jointcapability; /*!< Supported T38 capability at both ends */
800 enum t38state state; /*!< T.38 state */
803 /*! \brief Parameters to know status of transfer */
805 REFER_IDLE, /*!< No REFER is in progress */
806 REFER_SENT, /*!< Sent REFER to transferee */
807 REFER_RECEIVED, /*!< Received REFER from transferer */
808 REFER_CONFIRMED, /*!< Refer confirmed with a 100 TRYING */
809 REFER_ACCEPTED, /*!< Accepted by transferee */
810 REFER_RINGING, /*!< Target Ringing */
811 REFER_200OK, /*!< Answered by transfer target */
812 REFER_FAILED, /*!< REFER declined - go on */
813 REFER_NOAUTH /*!< We had no auth for REFER */
816 static const struct c_referstatusstring {
817 enum referstatus status;
819 } referstatusstrings[] = {
820 { REFER_IDLE, "<none>" },
821 { REFER_SENT, "Request sent" },
822 { REFER_RECEIVED, "Request received" },
823 { REFER_ACCEPTED, "Accepted" },
824 { REFER_RINGING, "Target ringing" },
825 { REFER_200OK, "Done" },
826 { REFER_FAILED, "Failed" },
827 { REFER_NOAUTH, "Failed - auth failure" }
830 /*! \brief Structure to handle SIP transfers. Dynamically allocated when needed */
831 /* OEJ: Should be moved to string fields */
833 char refer_to[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO extension */
834 char refer_to_domain[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO domain */
835 char refer_to_urioption[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO uri options */
836 char refer_to_context[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO context */
837 char referred_by[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
838 char referred_by_name[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
839 char refer_contact[AST_MAX_EXTENSION]; /*!< Place to store Contact info from a REFER extension */
840 char replaces_callid[BUFSIZ]; /*!< Replace info: callid */
841 char replaces_callid_totag[BUFSIZ/2]; /*!< Replace info: to-tag */
842 char replaces_callid_fromtag[BUFSIZ/2]; /*!< Replace info: from-tag */
843 struct sip_pvt *refer_call; /*!< Call we are referring */
844 int attendedtransfer; /*!< Attended or blind transfer? */
845 int localtransfer; /*!< Transfer to local domain? */
846 enum referstatus status; /*!< REFER status */
849 /*! \brief sip_pvt: PVT structures are used for each SIP dialog, ie. a call, a registration, a subscribe */
850 static struct sip_pvt {
851 ast_mutex_t lock; /*!< Dialog private lock */
852 int method; /*!< SIP method that opened this dialog */
853 AST_DECLARE_STRING_FIELDS(
854 AST_STRING_FIELD(callid); /*!< Global CallID */
855 AST_STRING_FIELD(randdata); /*!< Random data */
856 AST_STRING_FIELD(accountcode); /*!< Account code */
857 AST_STRING_FIELD(realm); /*!< Authorization realm */
858 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
859 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
860 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
861 AST_STRING_FIELD(domain); /*!< Authorization domain */
862 AST_STRING_FIELD(from); /*!< The From: header */
863 AST_STRING_FIELD(useragent); /*!< User agent in SIP request */
864 AST_STRING_FIELD(exten); /*!< Extension where to start */
865 AST_STRING_FIELD(context); /*!< Context for this call */
866 AST_STRING_FIELD(subscribecontext); /*!< Subscribecontext */
867 AST_STRING_FIELD(subscribeuri); /*!< Subscribecontext */
868 AST_STRING_FIELD(fromdomain); /*!< Domain to show in the from field */
869 AST_STRING_FIELD(fromuser); /*!< User to show in the user field */
870 AST_STRING_FIELD(fromname); /*!< Name to show in the user field */
871 AST_STRING_FIELD(tohost); /*!< Host we should put in the "to" field */
872 AST_STRING_FIELD(language); /*!< Default language for this call */
873 AST_STRING_FIELD(mohinterpret); /*!< MOH class to use when put on hold */
874 AST_STRING_FIELD(mohsuggest); /*!< MOH class to suggest when putting a peer on hold */
875 AST_STRING_FIELD(rdnis); /*!< Referring DNIS */
876 AST_STRING_FIELD(theirtag); /*!< Their tag */
877 AST_STRING_FIELD(username); /*!< [user] name */
878 AST_STRING_FIELD(peername); /*!< [peer] name, not set if [user] */
879 AST_STRING_FIELD(authname); /*!< Who we use for authentication */
880 AST_STRING_FIELD(uri); /*!< Original requested URI */
881 AST_STRING_FIELD(okcontacturi); /*!< URI from the 200 OK on INVITE */
882 AST_STRING_FIELD(peersecret); /*!< Password */
883 AST_STRING_FIELD(peermd5secret);
884 AST_STRING_FIELD(cid_num); /*!< Caller*ID number */
885 AST_STRING_FIELD(cid_name); /*!< Caller*ID name */
886 AST_STRING_FIELD(via); /*!< Via: header */
887 AST_STRING_FIELD(fullcontact); /*!< The Contact: that the UA registers with us */
888 AST_STRING_FIELD(our_contact); /*!< Our contact header */
889 AST_STRING_FIELD(rpid); /*!< Our RPID header */
890 AST_STRING_FIELD(rpid_from); /*!< Our RPID From header */
892 unsigned int ocseq; /*!< Current outgoing seqno */
893 unsigned int icseq; /*!< Current incoming seqno */
894 ast_group_t callgroup; /*!< Call group */
895 ast_group_t pickupgroup; /*!< Pickup group */
896 int lastinvite; /*!< Last Cseq of invite */
897 struct ast_flags flags[2]; /*!< SIP_ flags */
898 int timer_t1; /*!< SIP timer T1, ms rtt */
899 unsigned int sipoptions; /*!< Supported SIP options on the other end */
900 struct ast_codec_pref prefs; /*!< codec prefs */
901 int capability; /*!< Special capability (codec) */
902 int jointcapability; /*!< Supported capability at both ends (codecs ) */
903 int peercapability; /*!< Supported peer capability */
904 int prefcodec; /*!< Preferred codec (outbound only) */
905 int noncodeccapability; /*!< DTMF RFC2833 telephony-event */
906 int redircodecs; /*!< Redirect codecs */
907 int maxcallbitrate; /*!< Maximum Call Bitrate for Video Calls */
908 struct t38properties t38; /*!< T38 settings */
909 struct sockaddr_in udptlredirip; /*!< Where our T.38 UDPTL should be going if not to us */
910 struct ast_udptl *udptl; /*!< T.38 UDPTL session */
911 int callingpres; /*!< Calling presentation */
912 int authtries; /*!< Times we've tried to authenticate */
913 int expiry; /*!< How long we take to expire */
914 long branch; /*!< The branch identifier of this session */
915 char tag[11]; /*!< Our tag for this session */
916 int sessionid; /*!< SDP Session ID */
917 int sessionversion; /*!< SDP Session Version */
918 struct sockaddr_in sa; /*!< Our peer */
919 struct sockaddr_in redirip; /*!< Where our RTP should be going if not to us */
920 struct sockaddr_in vredirip; /*!< Where our Video RTP should be going if not to us */
921 time_t lastrtprx; /*!< Last RTP received */
922 time_t lastrtptx; /*!< Last RTP sent */
923 int rtptimeout; /*!< RTP timeout time */
924 int rtpholdtimeout; /*!< RTP timeout when on hold */
925 int rtpkeepalive; /*!< Send RTP packets for keepalive */
926 struct sockaddr_in recv; /*!< Received as */
927 struct in_addr ourip; /*!< Our IP */
928 struct ast_channel *owner; /*!< Who owns us (if we have an owner) */
929 struct sip_route *route; /*!< Head of linked list of routing steps (fm Record-Route) */
930 int route_persistant; /*!< Is this the "real" route? */
931 struct sip_auth *peerauth; /*!< Realm authentication */
932 int noncecount; /*!< Nonce-count */
933 char lastmsg[256]; /*!< Last Message sent/received */
934 int amaflags; /*!< AMA Flags */
935 int pendinginvite; /*!< Any pending invite ? (seqno of this) */
936 struct sip_request initreq; /*!< Initial request that opened the SIP dialog */
938 int maxtime; /*!< Max time for first response */
939 int initid; /*!< Auto-congest ID if appropriate (scheduler) */
940 int autokillid; /*!< Auto-kill ID (scheduler) */
941 enum transfermodes allowtransfer; /*!< REFER: restriction scheme */
942 struct sip_refer *refer; /*!< REFER: SIP transfer data structure */
943 enum subscriptiontype subscribed; /*!< SUBSCRIBE: Is this dialog a subscription? */
944 int stateid; /*!< SUBSCRIBE: ID for devicestate subscriptions */
945 int laststate; /*!< SUBSCRIBE: Last known extension state */
946 int dialogver; /*!< SUBSCRIBE: Version for subscription dialog-info */
948 struct ast_dsp *vad; /*!< Voice Activation Detection dsp */
950 struct sip_peer *relatedpeer; /*!< If this dialog is related to a peer, which one
951 Used in peerpoke, mwi subscriptions */
952 struct sip_registry *registry; /*!< If this is a REGISTER dialog, to which registry */
953 struct ast_rtp *rtp; /*!< RTP Session */
954 struct ast_rtp *vrtp; /*!< Video RTP session */
955 struct sip_pkt *packets; /*!< Packets scheduled for re-transmission */
956 struct sip_history_head *history; /*!< History of this SIP dialog */
957 struct ast_variable *chanvars; /*!< Channel variables to set for inbound call */
958 struct sip_pvt *next; /*!< Next dialog in chain */
959 struct sip_invite_param *options; /*!< Options for INVITE */
962 #define FLAG_RESPONSE (1 << 0)
963 #define FLAG_FATAL (1 << 1)
965 /*! \brief sip packet - raw format for outbound packets that are sent or scheduled for transmission */
967 struct sip_pkt *next; /*!< Next packet in linked list */
968 int retrans; /*!< Retransmission number */
969 int method; /*!< SIP method for this packet */
970 int seqno; /*!< Sequence number */
971 unsigned int flags; /*!< non-zero if this is a response packet (e.g. 200 OK) */
972 struct sip_pvt *owner; /*!< Owner AST call */
973 int retransid; /*!< Retransmission ID */
974 int timer_a; /*!< SIP timer A, retransmission timer */
975 int timer_t1; /*!< SIP Timer T1, estimated RTT or 500 ms */
976 int packetlen; /*!< Length of packet */
980 /*! \brief Structure for SIP user data. User's place calls to us */
982 /* Users who can access various contexts */
983 ASTOBJ_COMPONENTS(struct sip_user);
984 char secret[80]; /*!< Password */
985 char md5secret[80]; /*!< Password in md5 */
986 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
987 char subscribecontext[AST_MAX_CONTEXT]; /* Default context for subscriptions */
988 char cid_num[80]; /*!< Caller ID num */
989 char cid_name[80]; /*!< Caller ID name */
990 char accountcode[AST_MAX_ACCOUNT_CODE]; /* Account code */
991 char language[MAX_LANGUAGE]; /*!< Default language for this user */
992 char mohinterpret[MAX_MUSICCLASS];/*!< Music on Hold class */
993 char mohsuggest[MAX_MUSICCLASS];/*!< Music on Hold class */
994 char useragent[256]; /*!< User agent in SIP request */
995 struct ast_codec_pref prefs; /*!< codec prefs */
996 ast_group_t callgroup; /*!< Call group */
997 ast_group_t pickupgroup; /*!< Pickup Group */
998 unsigned int sipoptions; /*!< Supported SIP options */
999 struct ast_flags flags[2]; /*!< SIP_ flags */
1000 int amaflags; /*!< AMA flags for billing */
1001 int callingpres; /*!< Calling id presentation */
1002 int capability; /*!< Codec capability */
1003 int inUse; /*!< Number of calls in use */
1004 int call_limit; /*!< Limit of concurrent calls */
1005 enum transfermodes allowtransfer; /*! SIP Refer restriction scheme */
1006 struct ast_ha *ha; /*!< ACL setting */
1007 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
1008 int maxcallbitrate; /*!< Maximum Bitrate for a video call */
1011 /*! \brief Structure for SIP peer data, we place calls to peers if registered or fixed IP address (host) */
1012 /* XXX field 'name' must be first otherwise sip_addrcmp() will fail */
1014 ASTOBJ_COMPONENTS(struct sip_peer); /*!< name, refcount, objflags, object pointers */
1015 /*!< peer->name is the unique name of this object */
1016 char secret[80]; /*!< Password */
1017 char md5secret[80]; /*!< Password in MD5 */
1018 struct sip_auth *auth; /*!< Realm authentication list */
1019 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
1020 char subscribecontext[AST_MAX_CONTEXT]; /*!< Default context for subscriptions */
1021 char username[80]; /*!< Temporary username until registration */
1022 char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
1023 int amaflags; /*!< AMA Flags (for billing) */
1024 char tohost[MAXHOSTNAMELEN]; /*!< If not dynamic, IP address */
1025 char regexten[AST_MAX_EXTENSION]; /*!< Extension to register (if regcontext is used) */
1026 char fromuser[80]; /*!< From: user when calling this peer */
1027 char fromdomain[MAXHOSTNAMELEN]; /*!< From: domain when calling this peer */
1028 char fullcontact[256]; /*!< Contact registered with us (not in sip.conf) */
1029 char cid_num[80]; /*!< Caller ID num */
1030 char cid_name[80]; /*!< Caller ID name */
1031 int callingpres; /*!< Calling id presentation */
1032 int inUse; /*!< Number of calls in use */
1033 int inRinging; /*!< Number of calls ringing */
1034 int onHold; /*!< Peer has someone on hold */
1035 int call_limit; /*!< Limit of concurrent calls */
1036 enum transfermodes allowtransfer; /*! SIP Refer restriction scheme */
1037 char vmexten[AST_MAX_EXTENSION]; /*!< Dialplan extension for MWI notify message*/
1038 char mailbox[AST_MAX_EXTENSION]; /*!< Mailbox setting for MWI checks */
1039 char language[MAX_LANGUAGE]; /*!< Default language for prompts */
1040 char mohinterpret[MAX_MUSICCLASS];/*!< Music on Hold class */
1041 char mohsuggest[MAX_MUSICCLASS];/*!< Music on Hold class */
1042 char useragent[256]; /*!< User agent in SIP request (saved from registration) */
1043 struct ast_codec_pref prefs; /*!< codec prefs */
1045 time_t lastmsgcheck; /*!< Last time we checked for MWI */
1046 unsigned int sipoptions; /*!< Supported SIP options */
1047 struct ast_flags flags[2]; /*!< SIP_ flags */
1048 int expire; /*!< When to expire this peer registration */
1049 int capability; /*!< Codec capability */
1050 int rtptimeout; /*!< RTP timeout */
1051 int rtpholdtimeout; /*!< RTP Hold Timeout */
1052 int rtpkeepalive; /*!< Send RTP packets for keepalive */
1053 ast_group_t callgroup; /*!< Call group */
1054 ast_group_t pickupgroup; /*!< Pickup group */
1055 struct ast_dnsmgr_entry *dnsmgr;/*!< DNS refresh manager for peer */
1056 struct sockaddr_in addr; /*!< IP address of peer */
1057 int maxcallbitrate; /*!< Maximum Bitrate for a video call */
1060 struct sip_pvt *call; /*!< Call pointer */
1061 int pokeexpire; /*!< When to expire poke (qualify= checking) */
1062 int lastms; /*!< How long last response took (in ms), or -1 for no response */
1063 int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */
1064 struct timeval ps; /*!< Ping send time */
1066 struct sockaddr_in defaddr; /*!< Default IP address, used until registration */
1067 struct ast_ha *ha; /*!< Access control list */
1068 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
1069 struct sip_pvt *mwipvt; /*!< Subscription for MWI */
1075 /*! \brief Registrations with other SIP proxies */
1076 struct sip_registry {
1077 ASTOBJ_COMPONENTS_FULL(struct sip_registry,1,1);
1078 AST_DECLARE_STRING_FIELDS(
1079 AST_STRING_FIELD(callid); /*!< Global Call-ID */
1080 AST_STRING_FIELD(realm); /*!< Authorization realm */
1081 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
1082 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
1083 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
1084 AST_STRING_FIELD(domain); /*!< Authorization domain */
1085 AST_STRING_FIELD(username); /*!< Who we are registering as */
1086 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
1087 AST_STRING_FIELD(hostname); /*!< Domain or host we register to */
1088 AST_STRING_FIELD(secret); /*!< Password in clear text */
1089 AST_STRING_FIELD(md5secret); /*!< Password in md5 */
1090 AST_STRING_FIELD(contact); /*!< Contact extension */
1091 AST_STRING_FIELD(random);
1093 int portno; /*!< Optional port override */
1094 int expire; /*!< Sched ID of expiration */
1095 int regattempts; /*!< Number of attempts (since the last success) */
1096 int timeout; /*!< sched id of sip_reg_timeout */
1097 int refresh; /*!< How often to refresh */
1098 struct sip_pvt *call; /*!< create a sip_pvt structure for each outbound "registration dialog" in progress */
1099 enum sipregistrystate regstate; /*!< Registration state (see above) */
1100 time_t regtime; /*!< Last succesful registration time */
1101 int callid_valid; /*!< 0 means we haven't chosen callid for this registry yet. */
1102 unsigned int ocseq; /*!< Sequence number we got to for REGISTERs for this registry */
1103 struct sockaddr_in us; /*!< Who the server thinks we are */
1104 int noncecount; /*!< Nonce-count */
1105 char lastmsg[256]; /*!< Last Message sent/received */
1108 /* --- Linked lists of various objects --------*/
1110 /*! \brief The user list: Users and friends */
1111 static struct ast_user_list {
1112 ASTOBJ_CONTAINER_COMPONENTS(struct sip_user);
1115 /*! \brief The peer list: Peers and Friends */
1116 static struct ast_peer_list {
1117 ASTOBJ_CONTAINER_COMPONENTS(struct sip_peer);
1120 /*! \brief The register list: Other SIP proxys we register with and place calls to */
1121 static struct ast_register_list {
1122 ASTOBJ_CONTAINER_COMPONENTS(struct sip_registry);
1126 /*! \todo Move the sip_auth list to AST_LIST */
1127 static struct sip_auth *authl = NULL; /*!< Authentication list for realm authentication */
1130 /* --- Sockets and networking --------------*/
1131 static int sipsock = -1; /*!< Main socket for SIP network communication */
1132 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
1133 static struct sockaddr_in externip; /*!< External IP address if we are behind NAT */
1134 static char externhost[MAXHOSTNAMELEN]; /*!< External host name (possibly with dynamic DNS and DHCP */
1135 static time_t externexpire = 0; /*!< Expiration counter for re-resolving external host name in dynamic DNS */
1136 static int externrefresh = 10;
1137 static struct ast_ha *localaddr; /*!< List of local networks, on the same side of NAT as this Asterisk */
1138 static struct in_addr __ourip;
1139 static struct sockaddr_in outboundproxyip;
1141 static struct sockaddr_in debugaddr;
1143 static struct ast_config *notify_types; /*!< The list of manual NOTIFY types we know how to send */
1145 /*---------------------------- Forward declarations of functions in chan_sip.c */
1146 /*! \note This is added to help splitting up chan_sip.c into several files
1147 in coming releases */
1149 /*--- PBX interface functions */
1150 static struct ast_channel *sip_request_call(const char *type, int format, void *data, int *cause);
1151 static int sip_devicestate(void *data);
1152 static int sip_sendtext(struct ast_channel *ast, const char *text);
1153 static int sip_call(struct ast_channel *ast, char *dest, int timeout);
1154 static int sip_hangup(struct ast_channel *ast);
1155 static int sip_answer(struct ast_channel *ast);
1156 static struct ast_frame *sip_read(struct ast_channel *ast);
1157 static int sip_write(struct ast_channel *ast, struct ast_frame *frame);
1158 static int sip_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
1159 static int sip_transfer(struct ast_channel *ast, const char *dest);
1160 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
1161 static int sip_senddigit(struct ast_channel *ast, char digit);
1163 /*--- Transmitting responses and requests */
1164 static int sipsock_read(int *id, int fd, short events, void *ignore);
1165 static int __sip_xmit(struct sip_pvt *p, char *data, int len);
1166 static int __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, char *data, int len, int fatal, int sipmethod);
1167 static int __transmit_response(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
1168 static int retrans_pkt(void *data);
1169 static int transmit_sip_request(struct sip_pvt *p, struct sip_request *req);
1170 static int transmit_response(struct sip_pvt *p, const char *msg, const struct sip_request *req);
1171 static int transmit_response_reliable(struct sip_pvt *p, const char *msg, const struct sip_request *req);
1172 static int transmit_response_with_date(struct sip_pvt *p, const char *msg, const struct sip_request *req);
1173 static int transmit_response_with_sdp(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
1174 static int transmit_response_with_unsupported(struct sip_pvt *p, const char *msg, const struct sip_request *req, const char *unsupported);
1175 static int transmit_response_with_auth(struct sip_pvt *p, const char *msg, const struct sip_request *req, const char *rand, enum xmittype reliable, const char *header, int stale);
1176 static int transmit_response_with_allow(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
1177 static void transmit_fake_auth_response(struct sip_pvt *p, struct sip_request *req, int reliable);
1178 static int transmit_request(struct sip_pvt *p, int sipmethod, int inc, enum xmittype reliable, int newbranch);
1179 static int transmit_request_with_auth(struct sip_pvt *p, int sipmethod, int seqno, enum xmittype reliable, int newbranch);
1180 static int transmit_invite(struct sip_pvt *p, int sipmethod, int sdp, int init);
1181 static int transmit_reinvite_with_sdp(struct sip_pvt *p);
1182 static int transmit_info_with_digit(struct sip_pvt *p, const char digit);
1183 static int transmit_info_with_vidupdate(struct sip_pvt *p);
1184 static int transmit_message_with_text(struct sip_pvt *p, const char *text);
1185 static int transmit_refer(struct sip_pvt *p, const char *dest);
1186 static int transmit_notify_with_mwi(struct sip_pvt *p, int newmsgs, int oldmsgs, char *vmexten);
1187 static int transmit_notify_with_sipfrag(struct sip_pvt *p, int cseq, char *message, int terminate);
1188 static int transmit_state_notify(struct sip_pvt *p, int state, int full);
1189 static int transmit_register(struct sip_registry *r, int sipmethod, const char *auth, const char *authheader);
1190 static int send_response(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno);
1191 static int send_request(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno);
1192 static void copy_request(struct sip_request *dst, const struct sip_request *src);
1193 static void receive_message(struct sip_pvt *p, struct sip_request *req);
1194 static void parse_moved_contact(struct sip_pvt *p, struct sip_request *req);
1195 static int sip_send_mwi_to_peer(struct sip_peer *peer);
1196 static int does_peer_need_mwi(struct sip_peer *peer);
1198 /*--- Dialog management */
1199 static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *sin,
1200 int useglobal_nat, const int intended_method);
1201 static int __sip_autodestruct(void *data);
1202 static void sip_scheddestroy(struct sip_pvt *p, int ms);
1203 static void sip_cancel_destroy(struct sip_pvt *p);
1204 static void sip_destroy(struct sip_pvt *p);
1205 static void __sip_destroy(struct sip_pvt *p, int lockowner);
1206 static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod, int reset);
1207 static void __sip_pretend_ack(struct sip_pvt *p);
1208 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
1209 static int auto_congest(void *nothing);
1210 static int update_call_counter(struct sip_pvt *fup, int event);
1211 static int hangup_sip2cause(int cause);
1212 static const char *hangup_cause2sip(int cause);
1213 static struct sip_pvt *find_call(struct sip_request *req, struct sockaddr_in *sin, const int intended_method);
1214 static void free_old_route(struct sip_route *route);
1215 static void list_route(struct sip_route *route);
1216 static void build_route(struct sip_pvt *p, struct sip_request *req, int backwards);
1217 static enum check_auth_result register_verify(struct sip_pvt *p, struct sockaddr_in *sin,
1218 struct sip_request *req, char *uri);
1219 static struct sip_pvt *get_sip_pvt_byid_locked(const char *callid, const char *totag, const char *fromtag);
1220 static void check_pendings(struct sip_pvt *p);
1221 static void *sip_park_thread(void *stuff);
1222 static int sip_park(struct ast_channel *chan1, struct ast_channel *chan2, struct sip_request *req, int seqno);
1223 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
1225 /*--- Codec handling / SDP */
1226 static void try_suggested_sip_codec(struct sip_pvt *p);
1227 static const char* get_sdp_iterate(int* start, struct sip_request *req, const char *name);
1228 static const char *get_sdp(struct sip_request *req, const char *name);
1229 static int find_sdp(struct sip_request *req);
1230 static int process_sdp(struct sip_pvt *p, struct sip_request *req);
1231 static void add_codec_to_sdp(const struct sip_pvt *p, int codec, int sample_rate,
1232 char **m_buf, size_t *m_size, char **a_buf, size_t *a_size,
1234 static void add_noncodec_to_sdp(const struct sip_pvt *p, int format, int sample_rate,
1235 char **m_buf, size_t *m_size, char **a_buf, size_t *a_size,
1237 static int add_sdp(struct sip_request *resp, struct sip_pvt *p);
1239 /*--- Authentication stuff */
1240 static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, int sipmethod, int init);
1241 static int reply_digest(struct sip_pvt *p, struct sip_request *req, char *header, int sipmethod, char *digest, int digest_len);
1242 static int build_reply_digest(struct sip_pvt *p, int method, char *digest, int digest_len);
1243 static int clear_realm_authentication(struct sip_auth *authlist); /* Clear realm authentication list (at reload) */
1244 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, char *configuration, int lineno); /* Add realm authentication in list */
1245 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, const char *realm); /* Find authentication for a specific realm */
1246 static enum check_auth_result check_auth(struct sip_pvt *p, struct sip_request *req, const char *username,
1247 const char *secret, const char *md5secret, int sipmethod,
1248 char *uri, enum xmittype reliable, int ignore);
1249 static enum check_auth_result check_user_full(struct sip_pvt *p, struct sip_request *req,
1250 int sipmethod, char *uri, enum xmittype reliable,
1251 struct sockaddr_in *sin, struct sip_peer **authpeer);
1252 static int check_user(struct sip_pvt *p, struct sip_request *req, int sipmethod, char *uri, enum xmittype reliable, struct sockaddr_in *sin);
1253 static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, int sipmethod, int init);
1254 static int build_reply_digest(struct sip_pvt *p, int method, char* digest, int digest_len);
1256 /*--- Domain handling */
1257 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */
1258 static int add_sip_domain(const char *domain, const enum domain_mode mode, const char *context);
1259 static void clear_sip_domains(void);
1261 /*--- SIP realm authentication */
1262 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, char *configuration, int lineno);
1263 static int clear_realm_authentication(struct sip_auth *authlist);
1264 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, const char *realm);
1266 /*--- Misc functions */
1267 static int sip_do_reload(enum channelreloadreason reason);
1268 static int reload_config(enum channelreloadreason reason);
1269 static int expire_register(void *data);
1270 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
1271 static void *do_monitor(void *data);
1272 static int restart_monitor(void);
1273 static int sip_send_mwi_to_peer(struct sip_peer *peer);
1274 static void sip_destroy(struct sip_pvt *p);
1275 static int sip_addrcmp(char *name, struct sockaddr_in *sin); /* Support for peer matching */
1276 static int sip_refer_allocate(struct sip_pvt *p);
1277 static void ast_quiet_chan(struct ast_channel *chan);
1278 static int attempt_transfer(struct sip_dual *transferer, struct sip_dual *target);
1280 /*--- Device monitoring and Device/extension state handling */
1281 static int cb_extensionstate(char *context, char* exten, int state, void *data);
1282 static int sip_devicestate(void *data);
1283 static int sip_poke_noanswer(void *data);
1284 static int sip_poke_peer(struct sip_peer *peer);
1285 static void sip_poke_all_peers(void);
1286 static void sip_peer_hold(struct sip_pvt *p, int hold);
1288 /*--- Applications, functions, CLI and manager command helpers */
1289 static const char *sip_nat_mode(const struct sip_pvt *p);
1290 static int sip_show_inuse(int fd, int argc, char *argv[]);
1291 static char *transfermode2str(enum transfermodes mode) attribute_const;
1292 static char *nat2str(int nat) attribute_const;
1293 static int peer_status(struct sip_peer *peer, char *status, int statuslen);
1294 static int sip_show_users(int fd, int argc, char *argv[]);
1295 static int _sip_show_peers(int fd, int *total, struct mansession *s, struct message *m, int argc, char *argv[]);
1296 static int manager_sip_show_peers( struct mansession *s, struct message *m );
1297 static int sip_show_peers(int fd, int argc, char *argv[]);
1298 static int sip_show_objects(int fd, int argc, char *argv[]);
1299 static void print_group(int fd, unsigned int group, int crlf);
1300 static const char *dtmfmode2str(int mode) attribute_const;
1301 static const char *insecure2str(int port, int invite) attribute_const;
1302 static void cleanup_stale_contexts(char *new, char *old);
1303 static void print_codec_to_cli(int fd, struct ast_codec_pref *pref);
1304 static const char *domain_mode_to_text(const enum domain_mode mode);
1305 static int sip_show_domains(int fd, int argc, char *argv[]);
1306 static int _sip_show_peer(int type, int fd, struct mansession *s, struct message *m, int argc, char *argv[]);
1307 static int manager_sip_show_peer( struct mansession *s, struct message *m);
1308 static int sip_show_peer(int fd, int argc, char *argv[]);
1309 static int _sip_show_peer(int type, int fd, struct mansession *s, struct message *m, int argc, char *argv[]);
1310 static int sip_show_user(int fd, int argc, char *argv[]);
1311 static int sip_show_registry(int fd, int argc, char *argv[]);
1312 static int sip_show_settings(int fd, int argc, char *argv[]);
1313 static const char *subscription_type2str(enum subscriptiontype subtype) attribute_pure;
1314 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
1315 static int __sip_show_channels(int fd, int argc, char *argv[], int subscriptions);
1316 static int sip_show_channels(int fd, int argc, char *argv[]);
1317 static int sip_show_subscriptions(int fd, int argc, char *argv[]);
1318 static int __sip_show_channels(int fd, int argc, char *argv[], int subscriptions);
1319 static char *complete_sipch(const char *line, const char *word, int pos, int state);
1320 static char *complete_sip_peer(const char *word, int state, int flags2);
1321 static char *complete_sip_show_peer(const char *line, const char *word, int pos, int state);
1322 static char *complete_sip_debug_peer(const char *line, const char *word, int pos, int state);
1323 static char *complete_sip_user(const char *word, int state, int flags2);
1324 static char *complete_sip_show_user(const char *line, const char *word, int pos, int state);
1325 static char *complete_sipnotify(const char *line, const char *word, int pos, int state);
1326 static char *complete_sip_prune_realtime_peer(const char *line, const char *word, int pos, int state);
1327 static char *complete_sip_prune_realtime_user(const char *line, const char *word, int pos, int state);
1328 static int sip_show_channel(int fd, int argc, char *argv[]);
1329 static int sip_show_history(int fd, int argc, char *argv[]);
1330 static int sip_do_debug_ip(int fd, int argc, char *argv[]);
1331 static int sip_do_debug_peer(int fd, int argc, char *argv[]);
1332 static int sip_do_debug(int fd, int argc, char *argv[]);
1333 static int sip_no_debug(int fd, int argc, char *argv[]);
1334 static int sip_notify(int fd, int argc, char *argv[]);
1335 static int sip_do_history(int fd, int argc, char *argv[]);
1336 static int sip_no_history(int fd, int argc, char *argv[]);
1337 static int func_header_read(struct ast_channel *chan, char *function, char *data, char *buf, size_t len);
1338 static int func_check_sipdomain(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len);
1339 static int function_sippeer(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len);
1340 static int function_sipchaninfo_read(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len);
1341 static int sip_dtmfmode(struct ast_channel *chan, void *data);
1342 static int sip_addheader(struct ast_channel *chan, void *data);
1343 static int sip_do_reload(enum channelreloadreason reason);
1344 static int sip_reload(int fd, int argc, char *argv[]);
1347 Functions for enabling debug per IP or fully, or enabling history logging for
1350 static void sip_dump_history(struct sip_pvt *dialog); /* Dump history to LOG_DEBUG at end of dialog, before destroying data */
1351 static inline int sip_debug_test_addr(const struct sockaddr_in *addr);
1352 static inline int sip_debug_test_pvt(struct sip_pvt *p);
1353 static void append_history_full(struct sip_pvt *p, const char *fmt, ...);
1354 static void sip_dump_history(struct sip_pvt *dialog);
1356 /*--- Device object handling */
1357 static struct sip_peer *temp_peer(const char *name);
1358 static struct sip_peer *build_peer(const char *name, struct ast_variable *v, int realtime);
1359 static struct sip_user *build_user(const char *name, struct ast_variable *v, int realtime);
1360 static int update_call_counter(struct sip_pvt *fup, int event);
1361 static void sip_destroy_peer(struct sip_peer *peer);
1362 static void sip_destroy_user(struct sip_user *user);
1363 static int sip_poke_peer(struct sip_peer *peer);
1364 static void set_peer_defaults(struct sip_peer *peer);
1365 static struct sip_peer *temp_peer(const char *name);
1366 static void register_peer_exten(struct sip_peer *peer, int onoff);
1367 static void sip_destroy_peer(struct sip_peer *peer);
1368 static void sip_destroy_user(struct sip_user *user);
1369 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime);
1370 static struct sip_user *find_user(const char *name, int realtime);
1371 static int sip_poke_peer_s(void *data);
1372 static enum parse_register_result parse_register_contact(struct sip_pvt *pvt, struct sip_peer *p, struct sip_request *req);
1373 static int expire_register(void *data);
1374 static void reg_source_db(struct sip_peer *peer);
1375 static void destroy_association(struct sip_peer *peer);
1376 static int handle_common_options(struct ast_flags *flags, struct ast_flags *mask, struct ast_variable *v);
1378 /* Realtime device support */
1379 static void realtime_update_peer(const char *peername, struct sockaddr_in *sin, const char *username, const char *fullcontact, int expirey);
1380 static struct sip_user *realtime_user(const char *username);
1381 static void update_peer(struct sip_peer *p, int expiry);
1382 static struct sip_peer *realtime_peer(const char *peername, struct sockaddr_in *sin);
1383 static int sip_prune_realtime(int fd, int argc, char *argv[]);
1385 /*--- Internal UA client handling (outbound registrations) */
1386 static int ast_sip_ouraddrfor(struct in_addr *them, struct in_addr *us);
1387 static void sip_registry_destroy(struct sip_registry *reg);
1388 static int sip_register(char *value, int lineno);
1389 static char *regstate2str(enum sipregistrystate regstate) attribute_const;
1390 static int sip_reregister(void *data);
1391 static int __sip_do_register(struct sip_registry *r);
1392 static int sip_reg_timeout(void *data);
1393 static int do_register_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader);
1394 static int reply_digest(struct sip_pvt *p, struct sip_request *req, char *header, int sipmethod, char *digest, int digest_len);
1395 static void sip_send_all_registers(void);
1397 /*--- Parsing SIP requests and responses */
1398 static void append_date(struct sip_request *req); /* Append date to SIP packet */
1399 static int determine_firstline_parts(struct sip_request *req);
1400 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
1401 static const char *gettag(const struct sip_request *req, const char *header, char *tagbuf, int tagbufsize);
1402 static int find_sip_method(const char *msg);
1403 static unsigned int parse_sip_options(struct sip_pvt *pvt, const char *supported);
1404 static void parse_request(struct sip_request *req);
1405 static const char *get_header(const struct sip_request *req, const char *name);
1406 static char *referstatus2str(enum referstatus rstatus) attribute_pure;
1407 static int method_match(enum sipmethod id, const char *name);
1408 static void parse_copy(struct sip_request *dst, const struct sip_request *src);
1409 static char *get_in_brackets(char *tmp);
1410 static const char *find_alias(const char *name, const char *_default);
1411 static const char *__get_header(const struct sip_request *req, const char *name, int *start);
1412 static const char *get_header(const struct sip_request *req, const char *name);
1413 static int lws2sws(char *msgbuf, int len);
1414 static void extract_uri(struct sip_pvt *p, struct sip_request *req);
1415 static int get_refer_info(struct sip_pvt *transferer, struct sip_request *outgoing_req);
1416 static int get_also_info(struct sip_pvt *p, struct sip_request *oreq);
1417 static int parse_ok_contact(struct sip_pvt *pvt, struct sip_request *req);
1418 static int set_address_from_contact(struct sip_pvt *pvt);
1419 static void check_via(struct sip_pvt *p, struct sip_request *req);
1420 static char *get_calleridname(const char *input, char *output, size_t outputsize);
1421 static int get_rpid_num(const char *input, char *output, int maxlen);
1422 static int get_rdnis(struct sip_pvt *p, struct sip_request *oreq);
1423 static int get_destination(struct sip_pvt *p, struct sip_request *oreq);
1424 static int get_msg_text(char *buf, int len, struct sip_request *req);
1425 static const char *gettag(const struct sip_request *req, const char *header, char *tagbuf, int tagbufsize);
1426 static void free_old_route(struct sip_route *route);
1428 /*--- Constructing requests and responses */
1429 static void initialize_initreq(struct sip_pvt *p, struct sip_request *req);
1430 static int init_req(struct sip_request *req, int sipmethod, const char *recip);
1431 static int reqprep(struct sip_request *req, struct sip_pvt *p, int sipmethod, int seqno, int newbranch);
1432 static void initreqprep(struct sip_request *req, struct sip_pvt *p, int sipmethod);
1433 static int init_resp(struct sip_request *resp, const char *msg);
1434 static int respprep(struct sip_request *resp, struct sip_pvt *p, const char *msg, const struct sip_request *req);
1435 static const struct sockaddr_in *sip_real_dst(const struct sip_pvt *p);
1436 static void build_via(struct sip_pvt *p);
1437 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer);
1438 static int create_addr(struct sip_pvt *dialog, const char *opeer);
1439 static char *generate_random_string(char *buf, size_t size);
1440 static void build_callid_pvt(struct sip_pvt *pvt);
1441 static void build_callid_registry(struct sip_registry *reg, struct in_addr ourip, const char *fromdomain);
1442 static void make_our_tag(char *tagbuf, size_t len);
1443 static int add_header(struct sip_request *req, const char *var, const char *value);
1444 static int add_header_contentLength(struct sip_request *req, int len);
1445 static int add_line(struct sip_request *req, const char *line);
1446 static int add_text(struct sip_request *req, const char *text);
1447 static int add_digit(struct sip_request *req, char digit);
1448 static int add_vidupdate(struct sip_request *req);
1449 static void add_route(struct sip_request *req, struct sip_route *route);
1450 static int copy_header(struct sip_request *req, const struct sip_request *orig, const char *field);
1451 static int copy_all_header(struct sip_request *req, const struct sip_request *orig, const char *field);
1452 static int copy_via_headers(struct sip_pvt *p, struct sip_request *req, const struct sip_request *orig, const char *field);
1453 static void set_destination(struct sip_pvt *p, char *uri);
1454 static void append_date(struct sip_request *req);
1455 static void build_contact(struct sip_pvt *p);
1456 static void build_rpid(struct sip_pvt *p);
1458 /*------Request handling functions */
1459 static int handle_request(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int *recount, int *nounlock);
1460 static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, struct sockaddr_in *sin, int *recount, char *e);
1461 static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int debug, int ignore, int seqno, int *nounlock);
1462 static int handle_request_bye(struct sip_pvt *p, struct sip_request *req);
1463 static int handle_request_register(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, char *e);
1464 static int handle_request_cancel(struct sip_pvt *p, struct sip_request *req);
1465 static int handle_request_message(struct sip_pvt *p, struct sip_request *req);
1466 static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int seqno, char *e);
1467 static void handle_request_info(struct sip_pvt *p, struct sip_request *req);
1468 static int handle_request_options(struct sip_pvt *p, struct sip_request *req);
1469 static int handle_invite_replaces(struct sip_pvt *p, struct sip_request *req, int debug, int ignore, int seqno, struct sockaddr_in *sin);
1470 static int handle_request_notify(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int seqno, char *e);
1471 static int handle_invite_replaces(struct sip_pvt *p, struct sip_request *req, int debug, int ignore, int seqno, struct sockaddr_in *sin);
1472 static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *current, struct sip_request *req, int seqno);
1474 /*------Response handling functions */
1475 static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
1476 static void handle_response_refer(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
1477 static int handle_response_peerpoke(struct sip_pvt *p, int resp, struct sip_request *req);
1478 static int handle_response_register(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int ignore, int seqno);
1479 static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int ignore, int seqno);
1481 /*----- RTP interface functions */
1482 static int sip_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active);
1483 static struct ast_rtp *sip_get_rtp_peer(struct ast_channel *chan);
1484 static struct ast_rtp *sip_get_vrtp_peer(struct ast_channel *chan);
1485 static int sip_get_codec(struct ast_channel *chan);
1486 static struct ast_frame *sip_rtp_read(struct ast_channel *ast, struct sip_pvt *p, int *faxdetect);
1488 /*------ T38 Support --------- */
1489 static int sip_handle_t38_reinvite(struct ast_channel *chan, struct sip_pvt *pvt, int reinvite); /*!< T38 negotiation helper function */
1490 static int transmit_response_with_t38_sdp(struct sip_pvt *p, char *msg, struct sip_request *req, int retrans);
1491 static int transmit_reinvite_with_t38_sdp(struct sip_pvt *p);
1492 static struct ast_udptl *sip_get_udptl_peer(struct ast_channel *chan);
1493 static int sip_set_udptl_peer(struct ast_channel *chan, struct ast_udptl *udptl);
1495 /*! \brief Definition of this channel for PBX channel registration */
1496 static const struct ast_channel_tech sip_tech = {
1498 .description = "Session Initiation Protocol (SIP)",
1499 .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
1500 .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
1501 .requester = sip_request_call,
1502 .devicestate = sip_devicestate,
1504 .hangup = sip_hangup,
1505 .answer = sip_answer,
1508 .write_video = sip_write,
1509 .indicate = sip_indicate,
1510 .transfer = sip_transfer,
1512 .send_digit = sip_senddigit,
1513 .bridge = ast_rtp_bridge,
1514 .send_text = sip_sendtext,
1517 /**--- some list management macros. **/
1519 #define UNLINK(element, head, prev) do { \
1521 (prev)->next = (element)->next; \
1523 (head) = (element)->next; \
1526 /*! \brief Interface structure with callbacks used to connect to RTP module */
1527 static struct ast_rtp_protocol sip_rtp = {
1529 get_rtp_info: sip_get_rtp_peer,
1530 get_vrtp_info: sip_get_vrtp_peer,
1531 set_rtp_peer: sip_set_rtp_peer,
1532 get_codec: sip_get_codec,
1535 /*! \brief Interface structure with callbacks used to connect to UDPTL module*/
1536 static struct ast_udptl_protocol sip_udptl = {
1538 get_udptl_info: sip_get_udptl_peer,
1539 set_udptl_peer: sip_set_udptl_peer,
1542 /*! \brief Convert transfer status to string */
1543 static char *referstatus2str(enum referstatus rstatus)
1545 int i = (sizeof(referstatusstrings) / sizeof(referstatusstrings[0]));
1548 for (x = 0; x < i; x++) {
1549 if (referstatusstrings[x].status == rstatus)
1550 return (char *) referstatusstrings[x].text;
1555 /*! \brief Initialize the initital request packet in the pvt structure.
1556 This packet is used for creating replies and future requests in
1558 static void initialize_initreq(struct sip_pvt *p, struct sip_request *req)
1560 if (p->initreq.headers) {
1561 ast_log(LOG_DEBUG, "Initializing already initialized SIP dialog %s (presumably reinvite)\n", p->callid);
1563 /* Use this as the basis */
1564 copy_request(&p->initreq, req);
1565 parse_request(&p->initreq);
1566 if (ast_test_flag(req, SIP_PKT_DEBUG))
1567 ast_verbose("%d headers, %d lines\n", p->initreq.headers, p->initreq.lines);
1571 /*! \brief returns true if 'name' (with optional trailing whitespace)
1572 * matches the sip method 'id'.
1573 * Strictly speaking, SIP methods are case SENSITIVE, but we do
1574 * a case-insensitive comparison to be more tolerant.
1575 * following Jon Postel's rule: Be gentle in what you accept, strict with what you send
1577 static int method_match(enum sipmethod id, const char *name)
1579 int len = strlen(sip_methods[id].text);
1580 int l_name = name ? strlen(name) : 0;
1581 /* true if the string is long enough, and ends with whitespace, and matches */
1582 return (l_name >= len && name[len] < 33 &&
1583 !strncasecmp(sip_methods[id].text, name, len));
1586 /*! \brief find_sip_method: Find SIP method from header */
1587 static int find_sip_method(const char *msg)
1591 if (ast_strlen_zero(msg))
1593 for (i = 1; i < (sizeof(sip_methods) / sizeof(sip_methods[0])) && !res; i++) {
1594 if (method_match(i, msg))
1595 res = sip_methods[i].id;
1600 /*! \brief Parse supported header in incoming packet */
1601 static unsigned int parse_sip_options(struct sip_pvt *pvt, const char *supported)
1604 char *temp = ast_strdupa(supported);
1605 unsigned int profile = 0;
1608 if (ast_strlen_zero(supported) )
1611 if (option_debug > 2 && sipdebug)
1612 ast_log(LOG_DEBUG, "Begin: parsing SIP \"Supported: %s\"\n", supported);
1614 for (next = temp; next; next = sep) {
1616 if ( (sep = strchr(next, ',')) != NULL)
1618 next = ast_skip_blanks(next);
1619 if (option_debug > 2 && sipdebug)
1620 ast_log(LOG_DEBUG, "Found SIP option: -%s-\n", next);
1621 for (i=0; i < (sizeof(sip_options) / sizeof(sip_options[0])); i++) {
1622 if (!strcasecmp(next, sip_options[i].text)) {
1623 profile |= sip_options[i].id;
1625 if (option_debug > 2 && sipdebug)
1626 ast_log(LOG_DEBUG, "Matched SIP option: %s\n", next);
1630 if (!found && option_debug > 2 && sipdebug) {
1631 if (!strncasecmp(next, "x-", 2))
1632 ast_log(LOG_DEBUG, "Found private SIP option, not supported: %s\n", next);
1634 ast_log(LOG_DEBUG, "Found no match for SIP option: %s (Please file bug report!)\n", next);
1639 pvt->sipoptions = profile;
1643 /*! \brief See if we pass debug IP filter */
1644 static inline int sip_debug_test_addr(const struct sockaddr_in *addr)
1648 if (debugaddr.sin_addr.s_addr) {
1649 if (((ntohs(debugaddr.sin_port) != 0)
1650 && (debugaddr.sin_port != addr->sin_port))
1651 || (debugaddr.sin_addr.s_addr != addr->sin_addr.s_addr))
1657 /*! \brief The real destination address for a write */
1658 static const struct sockaddr_in *sip_real_dst(const struct sip_pvt *p)
1660 return ast_test_flag(&p->flags[0], SIP_NAT) & SIP_NAT_ROUTE ? &p->recv : &p->sa;
1663 /*! \brief Display SIP nat mode */
1664 static const char *sip_nat_mode(const struct sip_pvt *p)
1666 return ast_test_flag(&p->flags[0], SIP_NAT) & SIP_NAT_ROUTE ? "NAT" : "no NAT";
1669 /*! \brief Test PVT for debugging output */
1670 static inline int sip_debug_test_pvt(struct sip_pvt *p)
1674 return sip_debug_test_addr(sip_real_dst(p));
1677 /*! \brief Transmit SIP message */
1678 static int __sip_xmit(struct sip_pvt *p, char *data, int len)
1681 const struct sockaddr_in *dst = sip_real_dst(p);
1682 res=sendto(sipsock, data, len, 0, (const struct sockaddr *)dst, sizeof(struct sockaddr_in));
1685 ast_log(LOG_WARNING, "sip_xmit of %p (len %d) to %s:%d returned %d: %s\n", data, len, ast_inet_ntoa(dst->sin_addr), ntohs(dst->sin_port), res, strerror(errno));
1690 /*! \brief Build a Via header for a request */
1691 static void build_via(struct sip_pvt *p)
1693 /* Work around buggy UNIDEN UIP200 firmware */
1694 const char *rport = ast_test_flag(&p->flags[0], SIP_NAT) & SIP_NAT_RFC3581 ? ";rport" : "";
1696 /* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
1697 ast_string_field_build(p, via, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x%s",
1698 ast_inet_ntoa(p->ourip), ourport, p->branch, rport);
1701 /*! \brief NAT fix - decide which IP address to use for ASterisk server?
1703 * Using the localaddr structure built up with localnet statements in sip.conf
1704 * apply it to their address to see if we need to substitute our
1705 * externip or can get away with our internal bindaddr
1707 static enum sip_result ast_sip_ouraddrfor(struct in_addr *them, struct in_addr *us)
1709 struct sockaddr_in theirs, ours;
1711 /* Get our local information */
1712 ast_ouraddrfor(them, us);
1713 theirs.sin_addr = *them;
1714 ours.sin_addr = *us;
1716 if (localaddr && externip.sin_addr.s_addr &&
1717 ast_apply_ha(localaddr, &theirs) &&
1718 !ast_apply_ha(localaddr, &ours)) {
1719 if (externexpire && time(NULL) >= externexpire) {
1720 struct ast_hostent ahp;
1723 externexpire = time(NULL) + externrefresh;
1724 if ((hp = ast_gethostbyname(externhost, &ahp))) {
1725 memcpy(&externip.sin_addr, hp->h_addr, sizeof(externip.sin_addr));
1727 ast_log(LOG_NOTICE, "Warning: Re-lookup of '%s' failed!\n", externhost);
1729 *us = externip.sin_addr;
1731 ast_log(LOG_DEBUG, "Target address %s is not local, substituting externip\n",
1732 ast_inet_ntoa(*(struct in_addr *)&them->s_addr));
1734 } else if (bindaddr.sin_addr.s_addr)
1735 *us = bindaddr.sin_addr;
1739 /*! \brief Append to SIP dialog history
1740 \return Always returns 0 */
1741 #define append_history(p, event, fmt , args... ) append_history_full(p, "%-15s " fmt, event, ## args)
1743 static void append_history_full(struct sip_pvt *p, const char *fmt, ...)
1744 __attribute__ ((format (printf, 2, 3)));
1746 /*! \brief Append to SIP dialog history with arg list */
1747 static void append_history_va(struct sip_pvt *p, const char *fmt, va_list ap)
1749 char buf[80], *c = buf; /* max history length */
1750 struct sip_history *hist;
1753 vsnprintf(buf, sizeof(buf), fmt, ap);
1754 strsep(&c, "\r\n"); /* Trim up everything after \r or \n */
1755 l = strlen(buf) + 1;
1756 if (!(hist = ast_calloc(1, sizeof(*hist) + l)))
1758 if (!p->history && !(p->history = ast_calloc(1, sizeof(*p->history)))) {
1762 memcpy(hist->event, buf, l);
1763 AST_LIST_INSERT_TAIL(p->history, hist, list);
1766 /*! \brief Append to SIP dialog history with arg list */
1767 static void append_history_full(struct sip_pvt *p, const char *fmt, ...)
1771 if (!recordhistory || !p)
1774 append_history_va(p, fmt, ap);
1780 /*! \brief Retransmit SIP message if no answer (Called from scheduler) */
1781 static int retrans_pkt(void *data)
1783 struct sip_pkt *pkt = data, *prev, *cur = NULL;
1784 int reschedule = DEFAULT_RETRANS;
1786 /* Lock channel PVT */
1787 ast_mutex_lock(&pkt->owner->lock);
1789 if (pkt->retrans < MAX_RETRANS) {
1791 if (!pkt->timer_t1) { /* Re-schedule using timer_a and timer_t1 */
1792 if (sipdebug && option_debug > 3)
1793 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);
1797 if (sipdebug && option_debug > 3)
1798 ast_log(LOG_DEBUG, "SIP TIMER: Rescheduling retransmission #%d (%d) %s - %d\n", pkt->retransid, pkt->retrans, sip_methods[pkt->method].text, pkt->method);
1802 pkt->timer_a = 2 * pkt->timer_a;
1804 /* For non-invites, a maximum of 4 secs */
1805 siptimer_a = pkt->timer_t1 * pkt->timer_a; /* Double each time */
1806 if (pkt->method != SIP_INVITE && siptimer_a > 4000)
1809 /* Reschedule re-transmit */
1810 reschedule = siptimer_a;
1811 if (option_debug > 3)
1812 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);
1815 if (sip_debug_test_pvt(pkt->owner)) {
1816 const struct sockaddr_in *dst = sip_real_dst(pkt->owner);
1817 ast_verbose("Retransmitting #%d (%s) to %s:%d:\n%s\n---\n",
1818 pkt->retrans, sip_nat_mode(pkt->owner),
1819 ast_inet_ntoa(dst->sin_addr),
1820 ntohs(dst->sin_port), pkt->data);
1823 append_history(pkt->owner, "ReTx", "%d %s", reschedule, pkt->data);
1824 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen);
1825 ast_mutex_unlock(&pkt->owner->lock);
1828 /* Too many retries */
1829 if (pkt->owner && pkt->method != SIP_OPTIONS) {
1830 if (ast_test_flag(pkt, FLAG_FATAL) || sipdebug) /* Tell us if it's critical or if we're debugging */
1831 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");
1833 if ((pkt->method == SIP_OPTIONS) && sipdebug)
1834 ast_log(LOG_WARNING, "Cancelling retransmit of OPTIONs (call id %s) \n", pkt->owner->callid);
1836 append_history(pkt->owner, "MaxRetries", "%s", (ast_test_flag(pkt, FLAG_FATAL)) ? "(Critical)" : "(Non-critical)");
1838 pkt->retransid = -1;
1840 if (ast_test_flag(pkt, FLAG_FATAL)) {
1841 while(pkt->owner->owner && ast_channel_trylock(pkt->owner->owner)) {
1842 ast_mutex_unlock(&pkt->owner->lock); /* SIP_PVT, not channel */
1844 ast_mutex_lock(&pkt->owner->lock);
1846 if (pkt->owner->owner) {
1847 ast_set_flag(&pkt->owner->flags[0], SIP_ALREADYGONE);
1848 ast_log(LOG_WARNING, "Hanging up call %s - no reply to our critical packet.\n", pkt->owner->callid);
1849 ast_queue_hangup(pkt->owner->owner);
1850 ast_channel_unlock(pkt->owner->owner);
1852 /* If no channel owner, destroy now */
1853 ast_set_flag(&pkt->owner->flags[0], SIP_NEEDDESTROY);
1856 /* In any case, go ahead and remove the packet */
1857 for (prev = NULL, cur = pkt->owner->packets; cur; prev = cur, cur = cur->next) {
1863 prev->next = cur->next;
1865 pkt->owner->packets = cur->next;
1866 ast_mutex_unlock(&pkt->owner->lock);
1870 ast_log(LOG_WARNING, "Weird, couldn't find packet owner!\n");
1872 ast_mutex_unlock(&pkt->owner->lock);
1876 /*! \brief Transmit packet with retransmits
1877 \return 0 on success, -1 on failure to allocate packet
1879 static enum sip_result __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, char *data, int len, int fatal, int sipmethod)
1881 struct sip_pkt *pkt;
1882 int siptimer_a = DEFAULT_RETRANS;
1884 if (!(pkt = ast_calloc(1, sizeof(*pkt) + len + 1)))
1886 memcpy(pkt->data, data, len);
1887 pkt->method = sipmethod;
1888 pkt->packetlen = len;
1889 pkt->next = p->packets;
1893 pkt->data[len] = '\0';
1894 pkt->timer_t1 = p->timer_t1; /* Set SIP timer T1 */
1896 ast_set_flag(pkt, FLAG_FATAL);
1898 siptimer_a = pkt->timer_t1 * 2;
1900 /* Schedule retransmission */
1901 pkt->retransid = ast_sched_add_variable(sched, siptimer_a, retrans_pkt, pkt, 1);
1902 if (option_debug > 3 && sipdebug)
1903 ast_log(LOG_DEBUG, "*** SIP TIMER: Initalizing retransmit timer on packet: Id #%d\n", pkt->retransid);
1904 pkt->next = p->packets;
1907 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen); /* Send packet */
1908 if (sipmethod == SIP_INVITE) {
1909 /* Note this is a pending invite */
1910 p->pendinginvite = seqno;
1915 /*! \brief Kill a SIP dialog (called by scheduler) */
1916 static int __sip_autodestruct(void *data)
1918 struct sip_pvt *p = data;
1920 /* If this is a subscription, tell the phone that we got a timeout */
1921 if (p->subscribed) {
1922 p->subscribed = TIMEOUT;
1923 transmit_state_notify(p, AST_EXTENSION_DEACTIVATED, 1); /* Send last notification */
1924 p->subscribed = NONE;
1925 append_history(p, "Subscribestatus", "timeout");
1926 if (option_debug > 2)
1927 ast_log(LOG_DEBUG, "Re-scheduled destruction of SIP subsription %s\n", p->callid ? p->callid : "<unknown>");
1928 return 10000; /* Reschedule this destruction so that we know that it's gone */
1931 /* Reset schedule ID */
1935 ast_log(LOG_DEBUG, "Auto destroying call '%s'\n", p->callid);
1936 append_history(p, "AutoDestroy", "%s", p->callid);
1938 ast_log(LOG_WARNING, "Autodestruct on dialog '%s' with owner in place (Method: %s)\n", p->callid, sip_methods[p->method].text);
1939 ast_queue_hangup(p->owner);
1940 } else if (p->refer) {
1941 transmit_request_with_auth(p, SIP_BYE, 0, XMIT_RELIABLE, 1);
1948 /*! \brief Schedule destruction of SIP call */
1949 static void sip_scheddestroy(struct sip_pvt *p, int ms)
1951 if (sip_debug_test_pvt(p))
1952 ast_verbose("Scheduling destruction of SIP dialog '%s' in %d ms (Method: %s)\n", p->callid, ms, sip_methods[p->method].text);
1954 append_history(p, "SchedDestroy", "%d ms", ms);
1956 if (p->autokillid > -1)
1957 ast_sched_del(sched, p->autokillid);
1958 p->autokillid = ast_sched_add(sched, ms, __sip_autodestruct, p);
1961 /*! \brief Cancel destruction of SIP dialog */
1962 static void sip_cancel_destroy(struct sip_pvt *p)
1964 if (p->autokillid > -1) {
1965 ast_sched_del(sched, p->autokillid);
1966 append_history(p, "CancelDestroy", "");
1971 /*! \brief Acknowledges receipt of a packet and stops retransmission */
1972 static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod, int reset)
1974 struct sip_pkt *cur, *prev = NULL;
1976 /* Just in case... */
1980 msg = sip_methods[sipmethod].text;
1982 ast_mutex_lock(&p->lock);
1983 for (cur = p->packets; cur; prev = cur, cur = cur->next) {
1984 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1985 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1986 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1987 if (!resp && (seqno == p->pendinginvite)) {
1988 ast_log(LOG_DEBUG, "Acked pending invite %d\n", p->pendinginvite);
1989 p->pendinginvite = 0;
1991 /* this is our baby */
1993 UNLINK(cur, p->packets, prev);
1994 if (cur->retransid > -1) {
1995 if (sipdebug && option_debug > 3)
1996 ast_log(LOG_DEBUG, "** SIP TIMER: Cancelling retransmit of packet (reply received) Retransid #%d\n", cur->retransid);
1997 ast_sched_del(sched, cur->retransid);
2004 ast_mutex_unlock(&p->lock);
2006 ast_log(LOG_DEBUG, "Stopping retransmission on '%s' of %s %d: Match %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
2009 /*! \brief Pretend to ack all packets
2010 * maybe the lock on p is not strictly necessary but there might be a race */
2011 static void __sip_pretend_ack(struct sip_pvt *p)
2013 struct sip_pkt *cur = NULL;
2015 while (p->packets) {
2017 if (cur == p->packets) {
2018 ast_log(LOG_WARNING, "Have a packet that doesn't want to give up! %s\n", sip_methods[cur->method].text);
2022 method = (cur->method) ? cur->method : find_sip_method(cur->data);
2023 __sip_ack(p, cur->seqno, ast_test_flag(cur, FLAG_RESPONSE), method, FALSE);
2027 /*! \brief Acks receipt of packet, keep it around (used for provisional responses) */
2028 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
2030 struct sip_pkt *cur;
2033 for (cur = p->packets; cur; cur = cur->next) {
2034 if (cur->seqno == seqno && ast_test_flag(cur, FLAG_RESPONSE) == resp &&
2035 (ast_test_flag(cur, FLAG_RESPONSE) || method_match(sipmethod, cur->data))) {
2036 /* this is our baby */
2037 if (cur->retransid > -1) {
2038 if (option_debug > 3 && sipdebug)
2039 ast_log(LOG_DEBUG, "*** SIP TIMER: Cancelling retransmission #%d - %s (got response)\n", cur->retransid, sip_methods[sipmethod].text);
2040 ast_sched_del(sched, cur->retransid);
2042 cur->retransid = -1;
2048 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");
2053 /*! \brief Copy SIP request, parse it */
2054 static void parse_copy(struct sip_request *dst, const struct sip_request *src)
2056 memset(dst, 0, sizeof(*dst));
2057 memcpy(dst->data, src->data, sizeof(dst->data));
2058 dst->len = src->len;
2062 /* add a blank line if no body */
2063 static void add_blank(struct sip_request *req)
2066 /* Add extra empty return. add_header() reserves 4 bytes so cannot be truncated */
2067 snprintf(req->data + req->len, sizeof(req->data) - req->len, "\r\n");
2068 req->len += strlen(req->data + req->len);
2072 /*! \brief Transmit response on SIP request*/
2073 static int send_response(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno)
2078 if (sip_debug_test_pvt(p)) {
2079 const struct sockaddr_in *dst = sip_real_dst(p);
2081 ast_verbose("%sTransmitting (%s) to %s:%d:\n%s\n---\n",
2082 reliable ? "Reliably " : "", sip_nat_mode(p),
2083 ast_inet_ntoa(dst->sin_addr),
2084 ntohs(dst->sin_port), req->data);
2086 if (recordhistory) {
2087 struct sip_request tmp;
2088 parse_copy(&tmp, req);
2089 append_history(p, reliable ? "TxRespRel" : "TxResp", "%s / %s - %s", tmp.data, get_header(&tmp, "CSeq"),
2090 (tmp.method == SIP_RESPONSE || tmp.method == SIP_UNKNOWN) ? tmp.rlPart2 : sip_methods[tmp.method].text);
2093 __sip_reliable_xmit(p, seqno, 1, req->data, req->len, (reliable == XMIT_CRITICAL), req->method) :
2094 __sip_xmit(p, req->data, req->len);
2100 /*! \brief Send SIP Request to the other part of the dialogue */
2101 static int send_request(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno)
2106 if (sip_debug_test_pvt(p)) {
2107 if (ast_test_flag(&p->flags[0], SIP_NAT_ROUTE))
2108 ast_verbose("%sTransmitting (NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(p->recv.sin_addr), ntohs(p->recv.sin_port), req->data);
2110 ast_verbose("%sTransmitting (no NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(p->sa.sin_addr), ntohs(p->sa.sin_port), req->data);
2112 if (recordhistory) {
2113 struct sip_request tmp;
2114 parse_copy(&tmp, req);
2115 append_history(p, reliable ? "TxReqRel" : "TxReq", "%s / %s - %s", tmp.data, get_header(&tmp, "CSeq"), sip_methods[tmp.method].text);
2118 __sip_reliable_xmit(p, seqno, 0, req->data, req->len, (reliable > 1), req->method) :
2119 __sip_xmit(p, req->data, req->len);
2123 /*! \brief Pick out text in brackets from character string
2124 \return pointer to terminated stripped string
2125 \param tmp input string that will be modified */
2126 static char *get_in_brackets(char *tmp)
2130 char *first_bracket;
2131 char *second_bracket;
2136 first_quote = strchr(parse, '"');
2137 first_bracket = strchr(parse, '<');
2138 if (first_quote && first_bracket && (first_quote < first_bracket)) {
2140 for (parse = first_quote + 1; *parse; parse++) {
2141 if ((*parse == '"') && (last_char != '\\'))
2146 ast_log(LOG_WARNING, "No closing quote found in '%s'\n", tmp);
2152 if (first_bracket) {
2153 second_bracket = strchr(first_bracket + 1, '>');
2154 if (second_bracket) {
2155 *second_bracket = '\0';
2156 return first_bracket + 1;
2158 ast_log(LOG_WARNING, "No closing bracket found in '%s'\n", tmp);
2166 /*! \brief Send SIP MESSAGE text within a call
2167 Called from PBX core sendtext() application */
2168 static int sip_sendtext(struct ast_channel *ast, const char *text)
2170 struct sip_pvt *p = ast->tech_pvt;
2171 int debug = sip_debug_test_pvt(p);
2174 ast_verbose("Sending text %s on %s\n", text, ast->name);
2177 if (ast_strlen_zero(text))
2180 ast_verbose("Really sending text %s on %s\n", text, ast->name);
2181 transmit_message_with_text(p, text);
2185 /*! \brief Update peer object in realtime storage
2186 If the Asterisk system name is set in asterisk.conf, we will use
2187 that name and store that in the "regserver" field in the sippeers
2188 table to facilitate multi-server setups.
2190 static void realtime_update_peer(const char *peername, struct sockaddr_in *sin, const char *username, const char *fullcontact, int expirey)
2193 char ipaddr[INET_ADDRSTRLEN];
2194 char regseconds[20];
2196 char *sysname = ast_config_AST_SYSTEM_NAME;
2197 char *syslabel = NULL;
2199 time_t nowtime = time(NULL) + expirey;
2200 const char *fc = fullcontact ? "fullcontact" : NULL;
2202 snprintf(regseconds, sizeof(regseconds), "%d", (int)nowtime); /* Expiration time */
2203 ast_copy_string(ipaddr, ast_inet_ntoa(sin->sin_addr), sizeof(ipaddr));
2204 snprintf(port, sizeof(port), "%d", ntohs(sin->sin_port));
2206 if (ast_strlen_zero(sysname)) /* No system name, disable this */
2208 else if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTSAVE_SYSNAME))
2209 syslabel = "regserver";
2212 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr,
2213 "port", port, "regseconds", regseconds,
2214 "username", username, fc, fullcontact, syslabel, sysname, NULL); /* note fc and syslabel _can_ be NULL */
2216 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr,
2217 "port", port, "regseconds", regseconds,
2218 "username", username, syslabel, sysname, NULL); /* note syslabel _can_ be NULL */
2221 /*! \brief Automatically add peer extension to dial plan */
2222 static void register_peer_exten(struct sip_peer *peer, int onoff)
2225 char *stringp, *ext, *context;
2227 /* XXX note that global_regcontext is both a global 'enable' flag and
2228 * the name of the global regexten context, if not specified
2231 if (ast_strlen_zero(global_regcontext))
2234 ast_copy_string(multi, S_OR(peer->regexten, peer->name), sizeof(multi));
2236 while ((ext = strsep(&stringp, "&"))) {
2237 if ((context = strchr(ext, '@'))) {
2238 *context++ = '\0'; /* split ext@context */
2239 if (!ast_context_find(context)) {
2240 ast_log(LOG_WARNING, "Context %s must exist in regcontext= in sip.conf!\n", context);
2244 context = global_regcontext;
2247 ast_add_extension(context, 1, ext, 1, NULL, NULL, "Noop",
2248 ast_strdup(peer->name), ast_free, "SIP");
2250 ast_context_remove_extension(context, ext, 1, NULL);
2254 /*! \brief Destroy peer object from memory */
2255 static void sip_destroy_peer(struct sip_peer *peer)
2257 if (option_debug > 2)
2258 ast_log(LOG_DEBUG, "Destroying SIP peer %s\n", peer->name);
2260 /* Delete it, it needs to disappear */
2262 sip_destroy(peer->call);
2264 if (peer->mwipvt) /* We have an active subscription, delete it */
2265 sip_destroy(peer->mwipvt);
2267 if (peer->chanvars) {
2268 ast_variables_destroy(peer->chanvars);
2269 peer->chanvars = NULL;
2271 if (peer->expire > -1)
2272 ast_sched_del(sched, peer->expire);
2273 if (peer->pokeexpire > -1)
2274 ast_sched_del(sched, peer->pokeexpire);
2275 register_peer_exten(peer, FALSE);
2276 ast_free_ha(peer->ha);
2277 if (ast_test_flag(&peer->flags[1], SIP_PAGE2_SELFDESTRUCT))
2279 else if (ast_test_flag(&peer->flags[0], SIP_REALTIME))
2283 clear_realm_authentication(peer->auth);
2286 ast_dnsmgr_release(peer->dnsmgr);
2290 /*! \brief Update peer data in database (if used) */
2291 static void update_peer(struct sip_peer *p, int expiry)
2293 int rtcachefriends = ast_test_flag(&p->flags[1], SIP_PAGE2_RTCACHEFRIENDS);
2294 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTUPDATE) &&
2295 (ast_test_flag(&p->flags[0], SIP_REALTIME) || rtcachefriends)) {
2296 realtime_update_peer(p->name, &p->addr, p->username, rtcachefriends ? p->fullcontact : NULL, expiry);
2301 /*! \brief realtime_peer: Get peer from realtime storage
2302 * Checks the "sippeers" realtime family from extconfig.conf
2303 * \todo Consider adding check of port address when matching here to follow the same
2304 * algorithm as for static peers. Will we break anything by adding that?
2306 static struct sip_peer *realtime_peer(const char *newpeername, struct sockaddr_in *sin)
2308 struct sip_peer *peer;
2309 struct ast_variable *var = NULL;
2310 struct ast_variable *tmp;
2311 char ipaddr[INET_ADDRSTRLEN];
2313 /* First check on peer name */
2315 var = ast_load_realtime("sippeers", "name", newpeername, NULL);
2316 else if (sin) { /* Then check on IP address for dynamic peers */
2317 ast_copy_string(ipaddr, ast_inet_ntoa(sin->sin_addr), sizeof(ipaddr));
2318 var = ast_load_realtime("sippeers", "host", ipaddr, NULL); /* First check for fixed IP hosts */
2320 var = ast_load_realtime("sippeers", "ipaddr", ipaddr, NULL); /* Then check for registred hosts */
2326 for (tmp = var; tmp; tmp = tmp->next) {
2327 /* If this is type=user, then skip this object. */
2328 if (!strcasecmp(tmp->name, "type") &&
2329 !strcasecmp(tmp->value, "user")) {
2330 ast_variables_destroy(var);
2332 } else if (!newpeername && !strcasecmp(tmp->name, "name")) {
2333 newpeername = tmp->value;
2337 if (!newpeername) { /* Did not find peer in realtime */
2338 ast_log(LOG_WARNING, "Cannot Determine peer name ip=%s\n", ipaddr);
2339 ast_variables_destroy(var);
2343 /* Peer found in realtime, now build it in memory */
2344 peer = build_peer(newpeername, var, !ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS));
2346 ast_variables_destroy(var);
2350 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS)) {
2352 ast_copy_flags(&peer->flags[1],&global_flags[1], SIP_PAGE2_RTAUTOCLEAR|SIP_PAGE2_RTCACHEFRIENDS);
2353 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTAUTOCLEAR)) {
2354 if (peer->expire > -1) {
2355 ast_sched_del(sched, peer->expire);
2357 peer->expire = ast_sched_add(sched, (global_rtautoclear) * 1000, expire_register, (void *)peer);
2359 ASTOBJ_CONTAINER_LINK(&peerl,peer);
2361 ast_set_flag(&peer->flags[0], SIP_REALTIME);
2363 ast_variables_destroy(var);
2368 /*! \brief Support routine for find_peer */
2369 static int sip_addrcmp(char *name, struct sockaddr_in *sin)
2371 /* We know name is the first field, so we can cast */
2372 struct sip_peer *p = (struct sip_peer *) name;
2373 return !(!inaddrcmp(&p->addr, sin) ||
2374 (ast_test_flag(&p->flags[0], SIP_INSECURE_PORT) &&
2375 (p->addr.sin_addr.s_addr == sin->sin_addr.s_addr)));
2378 /*! \brief Locate peer by name or ip address
2379 * This is used on incoming SIP message to find matching peer on ip
2380 or outgoing message to find matching peer on name */
2381 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
2383 struct sip_peer *p = NULL;
2386 p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
2388 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, name, sip_addr_hashfunc, 1, sip_addrcmp);
2390 if (!p && realtime) {
2391 p = realtime_peer(peer, sin);
2396 /*! \brief Remove user object from in-memory storage */
2397 static void sip_destroy_user(struct sip_user *user)
2399 if (option_debug > 2)
2400 ast_log(LOG_DEBUG, "Destroying user object from memory: %s\n", user->name);
2401 ast_free_ha(user->ha);
2402 if (user->chanvars) {
2403 ast_variables_destroy(user->chanvars);
2404 user->chanvars = NULL;
2406 if (ast_test_flag(&user->flags[0], SIP_REALTIME))
2413 /*! \brief Load user from realtime storage
2414 * Loads user from "sipusers" category in realtime (extconfig.conf)
2415 * Users are matched on From: user name (the domain in skipped) */
2416 static struct sip_user *realtime_user(const char *username)
2418 struct ast_variable *var;
2419 struct ast_variable *tmp;
2420 struct sip_user *user = NULL;
2422 var = ast_load_realtime("sipusers", "name", username, NULL);
2427 for (tmp = var; tmp; tmp = tmp->next) {
2428 if (!strcasecmp(tmp->name, "type") &&
2429 !strcasecmp(tmp->value, "peer")) {
2430 ast_variables_destroy(var);
2435 user = build_user(username, var, !ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS));
2437 if (!user) { /* No user found */
2438 ast_variables_destroy(var);
2442 if (ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS)) {
2443 ast_set_flag(&user->flags[1], SIP_PAGE2_RTCACHEFRIENDS);
2445 ASTOBJ_CONTAINER_LINK(&userl,user);
2447 /* Move counter from s to r... */
2450 ast_set_flag(&user->flags[0], SIP_REALTIME);
2452 ast_variables_destroy(var);
2456 /*! \brief Locate user by name
2457 * Locates user by name (From: sip uri user name part) first
2458 * from in-memory list (static configuration) then from
2459 * realtime storage (defined in extconfig.conf) */
2460 static struct sip_user *find_user(const char *name, int realtime)
2462 struct sip_user *u = ASTOBJ_CONTAINER_FIND(&userl, name);
2464 u = realtime_user(name);
2468 /*! \brief Create address structure from peer reference.
2469 * return -1 on error, 0 on success.
2471 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer)
2475 if ((peer->addr.sin_addr.s_addr || peer->defaddr.sin_addr.s_addr) &&
2476 (!peer->maxms || ((peer->lastms >= 0) && (peer->lastms <= peer->maxms)))) {
2477 r->sa = (peer->addr.sin_addr.s_addr) ? peer->addr : peer->defaddr;
2483 ast_copy_flags(&r->flags[0], &peer->flags[0], SIP_FLAGS_TO_COPY);
2484 ast_copy_flags(&r->flags[1], &peer->flags[1], SIP_PAGE2_FLAGS_TO_COPY);
2485 r->capability = peer->capability;
2486 if (!ast_test_flag(&r->flags[1], SIP_PAGE2_VIDEOSUPPORT) && r->vrtp) {
2487 ast_rtp_destroy(r->vrtp);
2490 r->prefs = peer->prefs;
2491 if (ast_test_flag(&r->flags[1], SIP_PAGE2_T38SUPPORT)) {
2492 r->t38.capability = global_t38_capability;
2494 if (ast_udptl_get_error_correction_scheme(r->udptl) == UDPTL_ERROR_CORRECTION_FEC )
2495 r->t38.capability |= T38FAX_UDP_EC_FEC;
2496 else if (ast_udptl_get_error_correction_scheme(r->udptl) == UDPTL_ERROR_CORRECTION_REDUNDANCY )
2497 r->t38.capability |= T38FAX_UDP_EC_REDUNDANCY;
2498 else if (ast_udptl_get_error_correction_scheme(r->udptl) == UDPTL_ERROR_CORRECTION_NONE )
2499 r->t38.capability |= T38FAX_UDP_EC_NONE;
2500 r->t38.capability |= T38FAX_RATE_MANAGEMENT_TRANSFERED_TCF;
2501 if (option_debug > 1)
2502 ast_log(LOG_DEBUG,"Our T38 capability (%d)\n", r->t38.capability);
2504 r->t38.jointcapability = r->t38.capability;
2505 } else if (r->udptl) {
2506 ast_udptl_destroy(r->udptl);
2509 natflags = ast_test_flag(&r->flags[0], SIP_NAT) & SIP_NAT_ROUTE;
2512 ast_log(LOG_DEBUG, "Setting NAT on RTP to %s\n", natflags ? "On" : "Off");
2513 ast_rtp_setnat(r->rtp, natflags);
2514 ast_rtp_setdtmf(r->rtp, ast_test_flag(&r->flags[0], SIP_DTMF) != SIP_DTMF_INFO);
2518 ast_log(LOG_DEBUG, "Setting NAT on VRTP to %s\n", natflags ? "On" : "Off");
2519 ast_rtp_setnat(r->vrtp, natflags);
2520 ast_rtp_setdtmf(r->vrtp, 0);
2524 ast_log(LOG_DEBUG, "Setting NAT on UDPTL to %s\n", natflags ? "On" : "Off");
2525 ast_udptl_setnat(r->udptl, natflags);
2527 ast_string_field_set(r, peername, peer->username);
2528 ast_string_field_set(r, authname, peer->username);
2529 ast_string_field_set(r, username, peer->username);
2530 ast_string_field_set(r, peersecret, peer->secret);
2531 ast_string_field_set(r, peermd5secret, peer->md5secret);
2532 ast_string_field_set(r, tohost, peer->tohost);
2533 ast_string_field_set(r, fullcontact, peer->fullcontact);
2534 if (!r->initreq.headers && !ast_strlen_zero(peer->fromdomain)) {
2537 tmpcall = ast_strdupa(r->callid);
2538 c = strchr(tmpcall, '@');
2541 ast_string_field_build(r, callid, "%s@%s", tmpcall, peer->fromdomain);
2544 if (ast_strlen_zero(r->tohost))
2545 ast_string_field_set(r, tohost, ast_inet_ntoa(r->sa.sin_addr));
2546 if (!ast_strlen_zero(peer->fromdomain))
2547 ast_string_field_set(r, fromdomain, peer->fromdomain);
2548 if (!ast_strlen_zero(peer->fromuser))
2549 ast_string_field_set(r, fromuser, peer->fromuser);
2550 r->maxtime = peer->maxms;
2551 r->callgroup = peer->callgroup;
2552 r->pickupgroup = peer->pickupgroup;
2553 r->allowtransfer = peer->allowtransfer;
2554 /* Set timer T1 to RTT for this peer (if known by qualify=) */
2555 /* Minimum is settable or default to 100 ms */
2556 if (peer->maxms && peer->lastms)
2557 r->timer_t1 = peer->lastms < global_t1min ? global_t1min : peer->lastms;
2558 if ((ast_test_flag(&r->flags[0], SIP_DTMF) == SIP_DTMF_RFC2833) ||
2559 (ast_test_flag(&r->flags[0], SIP_DTMF) == SIP_DTMF_AUTO))
2560 r->noncodeccapability |= AST_RTP_DTMF;
2562 r->noncodeccapability &= ~AST_RTP_DTMF;
2563 ast_string_field_set(r, context, peer->context);
2564 r->rtptimeout = peer->rtptimeout;
2565 r->rtpholdtimeout = peer->rtpholdtimeout;
2566 r->rtpkeepalive = peer->rtpkeepalive;
2567 if (peer->call_limit)
2568 ast_set_flag(&r->flags[0], SIP_CALL_LIMIT);
2569 r->maxcallbitrate = peer->maxcallbitrate;
2574 /*! \brief create address structure from peer name
2575 * Or, if peer not found, find it in the global DNS
2576 * returns TRUE (-1) on failure, FALSE on success */
2577 static int create_addr(struct sip_pvt *dialog, const char *opeer)
2580 struct ast_hostent ahp;
2584 char host[MAXHOSTNAMELEN], *hostn;
2587 ast_copy_string(peer, opeer, sizeof(peer));
2588 port = strchr(peer, ':');
2591 dialog->sa.sin_family = AF_INET;
2592 dialog->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
2593 p = find_peer(peer, NULL, 1);
2596 int res = create_addr_from_peer(dialog, p);
2597 ASTOBJ_UNREF(p, sip_destroy_peer);
2601 portno = port ? atoi(port) : DEFAULT_SIP_PORT;
2603 char service[MAXHOSTNAMELEN];
2607 snprintf(service, sizeof(service), "_sip._udp.%s", peer);
2608 ret = ast_get_srv(NULL, host, sizeof(host), &tportno, service);
2614 hp = ast_gethostbyname(hostn, &ahp);
2616 ast_log(LOG_WARNING, "No such host: %s\n", peer);
2619 ast_string_field_set(dialog, tohost, peer);
2620 memcpy(&dialog->sa.sin_addr, hp->h_addr, sizeof(dialog->sa.sin_addr));
2621 dialog->sa.sin_port = htons(portno);
2622 dialog->recv = dialog->sa;
2626 /*! \brief Scheduled congestion on a call */
2627 static int auto_congest(void *nothing)
2629 struct sip_pvt *p = nothing;
2631 ast_mutex_lock(&p->lock);
2634 /* XXX fails on possible deadlock */
2635 if (!ast_channel_trylock(p->owner)) {
2636 ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
2637 append_history(p, "Cong", "Auto-congesting (timer)");
2638 ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
2639 ast_channel_unlock(p->owner);
2642 ast_mutex_unlock(&p->lock);
2647 /*! \brief Initiate SIP call from PBX
2648 * used from the dial() application */
2649 static int sip_call(struct ast_channel *ast, char *dest, int timeout)
2653 struct varshead *headp;
2654 struct ast_var_t *current;
2655 const char *referer = NULL; /* SIP refererer */
2658 if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
2659 ast_log(LOG_WARNING, "sip_call called on %s, neither down nor reserved\n", ast->name);
2663 /* Check whether there is vxml_url, distinctive ring variables */
2664 headp=&ast->varshead;
2665 AST_LIST_TRAVERSE(headp,current,entries) {
2666 /* Check whether there is a VXML_URL variable */
2667 if (!p->options->vxml_url && !strcasecmp(ast_var_name(current), "VXML_URL")) {
2668 p->options->vxml_url = ast_var_value(current);
2669 } else if (!p->options->uri_options && !strcasecmp(ast_var_name(current), "SIP_URI_OPTIONS")) {
2670 p->options->uri_options = ast_var_value(current);
2671 } else if (!p->options->distinctive_ring && !strcasecmp(ast_var_name(current), "ALERT_INFO")) {
2672 /* Check whether there is a ALERT_INFO variable */
2673 p->options->distinctive_ring = ast_var_value(current);
2674 } else if (!p->options->addsipheaders && !strncasecmp(ast_var_name(current), "SIPADDHEADER", strlen("SIPADDHEADER"))) {
2675 /* Check whether there is a variable with a name starting with SIPADDHEADER */
2676 p->options->addsipheaders = 1;
2677 } else if (!strcasecmp(ast_var_name(current),"SIPTRANSFER")) {
2678 /* This is a transfered call */
2679 p->options->transfer = 1;
2680 } else if (!strcasecmp(ast_var_name(current),"SIPTRANSFER_REFERER")) {
2681 /* This is the referer */
2682 referer = ast_var_value(current);
2683 } else if (!strcasecmp(ast_var_name(current),"SIPTRANSFER_REPLACES")) {
2684 /* We're replacing a call. */
2685 p->options->replaces = ast_var_value(current);
2686 } else if (!strcasecmp(ast_var_name(current),"T38CALL")) {
2687 p->t38.state = T38_LOCAL_DIRECT;
2689 ast_log(LOG_DEBUG,"T38State change to %d on channel %s\n", p->t38.state, ast->name);
2695 ast_set_flag(&p->flags[0], SIP_OUTGOING);
2697 if (p->options->transfer) {
2701 if (sipdebug && option_debug > 2)
2702 ast_log(LOG_DEBUG, "Call for %s transfered by %s\n", p->username, referer);
2703 snprintf(buf, sizeof(buf)-1, "-> %s (via %s)", p->cid_name, referer);
2705 snprintf(buf, sizeof(buf)-1, "-> %s", p->cid_name);
2707 ast_string_field_set(p, cid_name, buf);
2710 ast_log(LOG_DEBUG, "Outgoing Call for %s\n", p->username);
2712 res = update_call_counter(p, INC_CALL_RINGING);
2714 p->callingpres = ast->cid.cid_pres;
2715 p->jointcapability = p->capability;
2716 p->t38.jointcapability = p->t38.capability;
2718 ast_log(LOG_DEBUG,"Our T38 capability (%d), joint T38 capability (%d)\n", p->t38.capability, p->t38.jointcapability);
2719 transmit_invite(p, SIP_INVITE, 1, 2);
2721 /* Initialize auto-congest time */
2722 p->initid = ast_sched_add(sched, p->maxtime * 4, auto_congest, p);
2724 p->initid = ast_sched_add(sched, SIP_TRANS_TIMEOUT, auto_congest, p);
2730 /*! \brief Destroy registry object
2731 Objects created with the register= statement in static configuration */
2732 static void sip_registry_destroy(struct sip_registry *reg)
2735 if (option_debug > 2)
2736 ast_log(LOG_DEBUG, "Destroying registry entry for %s@%s\n", reg->username, reg->hostname);
2739 /* Clear registry before destroying to ensure
2740 we don't get reentered trying to grab the registry lock */
2741 reg->call->registry = NULL;
2742 if (option_debug > 2)
2743 ast_log(LOG_DEBUG, "Destroying active SIP dialog for registry %s@%s\n", reg->username, reg->hostname);
2744 sip_destroy(reg->call);
2746 if (reg->expire > -1)
2747 ast_sched_del(sched, reg->expire);
2748 if (reg->timeout > -1)
2749 ast_sched_del(sched, reg->timeout);
2750 ast_string_field_free_all(reg);
2756 /*! \brief Execute destruction of SIP dialog structure, release memory */
2757 static void __sip_destroy(struct sip_pvt *p, int lockowner)
2759 struct sip_pvt *cur, *prev = NULL;
2762 if (sip_debug_test_pvt(p) || option_debug > 2)
2763 ast_verbose("Really destroying SIP dialog '%s' Method: %s\n", p->callid, sip_methods[p->method].text);
2765 /* Remove link from peer to subscription of MWI */
2766 if (p->relatedpeer && p->relatedpeer->mwipvt)
2767 p->relatedpeer->mwipvt = NULL;
2770 sip_dump_history(p);
2775 if (p->stateid > -1)
2776 ast_extension_state_del(p->stateid, NULL);
2778 ast_sched_del(sched, p->initid);
2779 if (p->autokillid > -1)
2780 ast_sched_del(sched, p->autokillid);
2783 ast_rtp_destroy(p->rtp);
2785 ast_rtp_destroy(p->vrtp);
2787 ast_udptl_destroy(p->udptl);
2791 free_old_route(p->route);
2795 if (p->registry->call == p)
2796 p->registry->call = NULL;
2797 ASTOBJ_UNREF(p->registry, sip_registry_destroy);
2800 /* Unlink us from the owner if we have one */
2803 ast_channel_lock(p->owner);
2805 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
2806 p->owner->tech_pvt = NULL;
2808 ast_channel_unlock(p->owner);
2812 struct sip_history *hist;
2813 while( (hist = AST_LIST_REMOVE_HEAD(p->history, list)) )
2819 for (prev = NULL, cur = iflist; cur; prev = cur, cur = cur->next) {
2821 UNLINK(cur, iflist, prev);
2826 ast_log(LOG_WARNING, "Trying to destroy \"%s\", not found in dialog list?!?! \n", p->callid);
2830 /* remove all current packets in this dialog */
2831 while((cp = p->packets)) {
2832 p->packets = p->packets->next;
2833 if (cp->retransid > -1)
2834 ast_sched_del(sched, cp->retransid);
2838 ast_variables_destroy(p->chanvars);
2841 ast_mutex_destroy(&p->lock);
2843 ast_string_field_free_all(p);
2848 /*! \brief update_call_counter: Handle call_limit for SIP users
2849 * Setting a call-limit will cause calls above the limit not to be accepted.
2851 * Remember that for a type=friend, there's one limit for the user and
2852 * another for the peer, not a combined call limit.
2853 * This will cause unexpected behaviour in subscriptions, since a "friend"
2854 * is *two* devices in Asterisk, not one.
2856 * Thought: For realtime, we should propably update storage with inuse counter...
2858 * \return 0 if call is ok (no call limit, below treshold)
2859 * -1 on rejection of call
2862 static int update_call_counter(struct sip_pvt *fup, int event)
2865 int *inuse, *call_limit, *inringing = NULL;
2866 int outgoing = ast_test_flag(&fup->flags[0], SIP_OUTGOING);
2867 struct sip_user *u = NULL;
2868 struct sip_peer *p = NULL;
2870 if (option_debug > 2)
2871 ast_log(LOG_DEBUG, "Updating call counter for %s call\n", outgoing ? "outgoing" : "incoming");
2872 /* Test if we need to check call limits, in order to avoid
2873 realtime lookups if we do not need it */
2874 if (!ast_test_flag(&fup->flags[0], SIP_CALL_LIMIT))
2877 ast_copy_string(name, fup->username, sizeof(name));
2879 /* Check the list of users */
2880 if (!outgoing) /* Only check users for incoming calls */
2881 u = find_user(name, 1);
2885 call_limit = &u->call_limit;
2888 /* Try to find peer */
2890 p = find_peer(fup->peername, NULL, 1);
2893 call_limit = &p->call_limit;
2894 inringing = &p->inRinging;
2895 ast_copy_string(name, fup->peername, sizeof(name));
2897 if (option_debug > 1)
2898 ast_log(LOG_DEBUG, "%s is not a local device, no call limit\n", name);
2903 /* incoming and outgoing affects the inUse counter */
2904 case DEC_CALL_LIMIT:
2906 if (ast_test_flag(&fup->flags[0], SIP_INC_COUNT))
2912 if (ast_test_flag(&fup->flags[1], SIP_PAGE2_INC_RINGING)) {
2916 ast_log(LOG_WARNING, "Inringing for peer '%s' < 0?\n", fup->peername);
2917 ast_clear_flag(&fup->flags[1], SIP_PAGE2_INC_RINGING);
2920 if (option_debug > 1 || sipdebug) {
2921 ast_log(LOG_DEBUG, "Call %s %s '%s' removed from call limit %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *call_limit);
2924 case INC_CALL_RINGING:
2925 case INC_CALL_LIMIT:
2926 if (*call_limit > 0 ) {
2927 if (*inuse >= *call_limit) {
2928 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);
2930 ASTOBJ_UNREF(u, sip_destroy_user);
2932 ASTOBJ_UNREF(p, sip_destroy_peer);
2936 if (inringing && (event == INC_CALL_RINGING)) {
2937 if (!ast_test_flag(&fup->flags[1], SIP_PAGE2_INC_RINGING)) {
2939 ast_set_flag(&fup->flags[1], SIP_PAGE2_INC_RINGING);
2944 ast_set_flag(&fup->flags[0], SIP_INC_COUNT);
2945 if (option_debug > 1 || sipdebug) {
2946 ast_log(LOG_DEBUG, "Call %s %s '%s' is %d out of %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *inuse, *call_limit);
2949 case DEC_CALL_RINGING:
2951 if (ast_test_flag(&fup->flags[1], SIP_PAGE2_INC_RINGING)) {
2955 ast_log(LOG_WARNING, "Inringing for peer '%s' < 0?\n", p->name);
2956 ast_clear_flag(&fup->flags[1], SIP_PAGE2_INC_RINGING);
2961 ast_log(LOG_ERROR, "update_call_counter(%s, %d) called with no event!\n", name, event);
2964 ast_device_state_changed("SIP/%s", p->name);
2966 ASTOBJ_UNREF(u, sip_destroy_user);
2968 ASTOBJ_UNREF(p, sip_destroy_peer);
2972 /*! \brief Destroy SIP call structure */
2973 static void sip_destroy(struct sip_pvt *p)
2975 ast_mutex_lock(&iflock);
2976 if (option_debug > 2)
2977 ast_log(LOG_DEBUG, "Destroying SIP dialog %s\n", p->callid);
2978 __sip_destroy(p, 1);
2979 ast_mutex_unlock(&iflock);
2982 /*! \brief Convert SIP hangup causes to Asterisk hangup causes */
2983 static int hangup_sip2cause(int cause)
2985 /* Possible values taken from causes.h */
2988 case 401: /* Unauthorized */
2989 return AST_CAUSE_CALL_REJECTED;
2990 case 403: /* Not found */
2991 return AST_CAUSE_CALL_REJECTED;
2992 case 404: /* Not found */
2993 return AST_CAUSE_UNALLOCATED;
2994 case 405: /* Method not allowed */
2995 return AST_CAUSE_INTERWORKING;
2996 case 407: /* Proxy authentication required */
2997 return AST_CAUSE_CALL_REJECTED;
2998 case 408: /* No reaction */
2999 return AST_CAUSE_NO_USER_RESPONSE;
3000 case 409: /* Conflict */
3001 return AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
3002 case 410: /* Gone */
3003 return AST_CAUSE_UNALLOCATED;
3004 case 411: /* Length required */
3005 return AST_CAUSE_INTERWORKING;
3006 case 413: /* Request entity too large */
3007 return AST_CAUSE_INTERWORKING;
3008 case 414: /* Request URI too large */
3009 return AST_CAUSE_INTERWORKING;
3010 case 415: /* Unsupported media type */
3011 return AST_CAUSE_INTERWORKING;
3012 case 420: /* Bad extension */
3013 return AST_CAUSE_NO_ROUTE_DESTINATION;
3014 case 480: /* No answer */
3015 return AST_CAUSE_NO_ANSWER;
3016 case 481: /* No answer */
3017 return AST_CAUSE_INTERWORKING;
3018 case 482: /* Loop detected */
3019 return AST_CAUSE_INTERWORKING;
3020 case 483: /* Too many hops */
3021 return AST_CAUSE_NO_ANSWER;
3022 case 484: /* Address incomplete */
3023 return AST_CAUSE_INVALID_NUMBER_FORMAT;
3024 case 485: /* Ambigous */
3025 return AST_CAUSE_UNALLOCATED;
3026 case 486: /* Busy everywhere */
3027 return AST_CAUSE_BUSY;
3028 case 487: /* Request terminated */