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
33 * \todo Better support of forking
41 #include <sys/socket.h>
42 #include <sys/ioctl.h>
49 #include <sys/signal.h>
50 #include <netinet/in.h>
51 #include <netinet/in_systm.h>
52 #include <arpa/inet.h>
53 #include <netinet/ip.h>
58 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
60 #include "asterisk/lock.h"
61 #include "asterisk/channel.h"
62 #include "asterisk/config.h"
63 #include "asterisk/logger.h"
64 #include "asterisk/module.h"
65 #include "asterisk/pbx.h"
66 #include "asterisk/options.h"
67 #include "asterisk/lock.h"
68 #include "asterisk/sched.h"
69 #include "asterisk/io.h"
70 #include "asterisk/rtp.h"
71 #include "asterisk/acl.h"
72 #include "asterisk/manager.h"
73 #include "asterisk/callerid.h"
74 #include "asterisk/cli.h"
75 #include "asterisk/app.h"
76 #include "asterisk/musiconhold.h"
77 #include "asterisk/dsp.h"
78 #include "asterisk/features.h"
79 #include "asterisk/acl.h"
80 #include "asterisk/srv.h"
81 #include "asterisk/astdb.h"
82 #include "asterisk/causes.h"
83 #include "asterisk/utils.h"
84 #include "asterisk/file.h"
85 #include "asterisk/astobj.h"
86 #include "asterisk/dnsmgr.h"
87 #include "asterisk/devicestate.h"
88 #include "asterisk/linkedlists.h"
89 #include "asterisk/stringfields.h"
92 #include "asterisk/astosp.h"
95 #ifndef DEFAULT_USERAGENT
96 #define DEFAULT_USERAGENT "Asterisk PBX"
99 #define VIDEO_CODEC_MASK 0x1fc0000 /* Video codecs from H.261 thru AST_FORMAT_MAX_VIDEO */
100 #ifndef IPTOS_MINCOST
101 #define IPTOS_MINCOST 0x02
104 /* #define VOCAL_DATA_HACK */
107 #define DEFAULT_DEFAULT_EXPIRY 120
108 #define DEFAULT_MIN_EXPIRY 60
109 #define DEFAULT_MAX_EXPIRY 3600
110 #define DEFAULT_REGISTRATION_TIMEOUT 20
111 #define DEFAULT_MAX_FORWARDS "70"
113 /* guard limit must be larger than guard secs */
114 /* guard min must be < 1000, and should be >= 250 */
115 #define EXPIRY_GUARD_SECS 15 /* How long before expiry do we reregister */
116 #define EXPIRY_GUARD_LIMIT 30 /* Below here, we use EXPIRY_GUARD_PCT instead of
118 #define EXPIRY_GUARD_MIN 500 /* This is the minimum guard time applied. If
119 GUARD_PCT turns out to be lower than this, it
120 will use this time instead.
121 This is in milliseconds. */
122 #define EXPIRY_GUARD_PCT 0.20 /* Percentage of expires timeout to use when
123 below EXPIRY_GUARD_LIMIT */
125 static int min_expiry = DEFAULT_MIN_EXPIRY;
126 static int max_expiry = DEFAULT_MAX_EXPIRY;
127 static int default_expiry = DEFAULT_DEFAULT_EXPIRY;
130 #define MAX(a,b) ((a) > (b) ? (a) : (b))
133 #define CALLERID_UNKNOWN "Unknown"
137 #define DEFAULT_MAXMS 2000 /* Must be faster than 2 seconds by default */
138 #define DEFAULT_FREQ_OK 60 * 1000 /* How often to check for the host to be up */
139 #define DEFAULT_FREQ_NOTOK 10 * 1000 /* How often to check, if the host is down... */
141 #define DEFAULT_RETRANS 1000 /* How frequently to retransmit */
142 /* 2 * 500 ms in RFC 3261 */
143 #define MAX_RETRANS 6 /* Try only 6 times for retransmissions, a total of 7 transmissions */
144 #define MAX_AUTHTRIES 3 /* Try authentication three times, then fail */
147 #define DEBUG_READ 0 /* Recieved data */
148 #define DEBUG_SEND 1 /* Transmit data */
150 static const char desc[] = "Session Initiation Protocol (SIP)";
151 static const char channeltype[] = "SIP";
152 static const char config[] = "sip.conf";
153 static const char notify_config[] = "sip_notify.conf";
158 /* Do _NOT_ make any changes to this enum, or the array following it;
159 if you think you are doing the right thing, you are probably
160 not doing the right thing. If you think there are changes
161 needed, get someone else to review them first _before_
162 submitting a patch. If these two lists do not match properly
163 bad things will happen.
166 enum subscriptiontype {
175 static const struct cfsubscription_types {
176 enum subscriptiontype type;
177 const char * const event;
178 const char * const mediatype;
179 const char * const text;
180 } subscription_types[] = {
181 { NONE, "-", "unknown", "unknown" },
182 /* IETF draft: draft-ietf-sipping-dialog-package-05.txt */
183 { DIALOG_INFO_XML, "dialog", "application/dialog-info+xml", "dialog-info+xml" },
184 { CPIM_PIDF_XML, "presence", "application/cpim-pidf+xml", "cpim-pidf+xml" }, /* RFC 3863 */
185 { PIDF_XML, "presence", "application/pidf+xml", "pidf+xml" }, /* RFC 3863 */
186 { XPIDF_XML, "presence", "application/xpidf+xml", "xpidf+xml" } /* Pre-RFC 3863 with MS additions */
213 /*! XXX Note that sip_methods[i].id == i must hold or the code breaks */
214 static const struct cfsip_methods {
216 int need_rtp; /*!< when this is the 'primary' use for a pvt structure, does it need RTP? */
219 { SIP_UNKNOWN, RTP, "-UNKNOWN-" },
220 { SIP_RESPONSE, NO_RTP, "SIP/2.0" },
221 { SIP_REGISTER, NO_RTP, "REGISTER" },
222 { SIP_OPTIONS, NO_RTP, "OPTIONS" },
223 { SIP_NOTIFY, NO_RTP, "NOTIFY" },
224 { SIP_INVITE, RTP, "INVITE" },
225 { SIP_ACK, NO_RTP, "ACK" },
226 { SIP_PRACK, NO_RTP, "PRACK" },
227 { SIP_BYE, NO_RTP, "BYE" },
228 { SIP_REFER, NO_RTP, "REFER" },
229 { SIP_SUBSCRIBE, NO_RTP, "SUBSCRIBE" },
230 { SIP_MESSAGE, NO_RTP, "MESSAGE" },
231 { SIP_UPDATE, NO_RTP, "UPDATE" },
232 { SIP_INFO, NO_RTP, "INFO" },
233 { SIP_CANCEL, NO_RTP, "CANCEL" },
234 { SIP_PUBLISH, NO_RTP, "PUBLISH" }
237 /*! \brief Structure for conversion between compressed SIP and "normal" SIP */
238 static const struct cfalias {
239 char * const fullname;
240 char * const shortname;
242 { "Content-Type", "c" },
243 { "Content-Encoding", "e" },
247 { "Content-Length", "l" },
250 { "Supported", "k" },
252 { "Referred-By", "b" },
253 { "Allow-Events", "u" },
256 { "Accept-Contact", "a" },
257 { "Reject-Contact", "j" },
258 { "Request-Disposition", "d" },
259 { "Session-Expires", "x" },
262 /*! Define SIP option tags, used in Require: and Supported: headers
263 We need to be aware of these properties in the phones to use
264 the replace: header. We should not do that without knowing
265 that the other end supports it...
266 This is nothing we can configure, we learn by the dialog
267 Supported: header on the REGISTER (peer) or the INVITE
269 We are not using many of these today, but will in the future.
270 This is documented in RFC 3261
273 #define NOT_SUPPORTED 0
275 #define SIP_OPT_REPLACES (1 << 0)
276 #define SIP_OPT_100REL (1 << 1)
277 #define SIP_OPT_TIMER (1 << 2)
278 #define SIP_OPT_EARLY_SESSION (1 << 3)
279 #define SIP_OPT_JOIN (1 << 4)
280 #define SIP_OPT_PATH (1 << 5)
281 #define SIP_OPT_PREF (1 << 6)
282 #define SIP_OPT_PRECONDITION (1 << 7)
283 #define SIP_OPT_PRIVACY (1 << 8)
284 #define SIP_OPT_SDP_ANAT (1 << 9)
285 #define SIP_OPT_SEC_AGREE (1 << 10)
286 #define SIP_OPT_EVENTLIST (1 << 11)
287 #define SIP_OPT_GRUU (1 << 12)
288 #define SIP_OPT_TARGET_DIALOG (1 << 13)
290 /*! \brief List of well-known SIP options. If we get this in a require,
291 we should check the list and answer accordingly. */
292 static const struct cfsip_options {
293 int id; /*!< Bitmap ID */
294 int supported; /*!< Supported by Asterisk ? */
295 char * const text; /*!< Text id, as in standard */
297 /* Replaces: header for transfer */
298 { SIP_OPT_REPLACES, SUPPORTED, "replaces" },
299 /* RFC3262: PRACK 100% reliability */
300 { SIP_OPT_100REL, NOT_SUPPORTED, "100rel" },
301 /* SIP Session Timers */
302 { SIP_OPT_TIMER, NOT_SUPPORTED, "timer" },
303 /* RFC3959: SIP Early session support */
304 { SIP_OPT_EARLY_SESSION, NOT_SUPPORTED, "early-session" },
305 /* SIP Join header support */
306 { SIP_OPT_JOIN, NOT_SUPPORTED, "join" },
307 /* RFC3327: Path support */
308 { SIP_OPT_PATH, NOT_SUPPORTED, "path" },
309 /* RFC3840: Callee preferences */
310 { SIP_OPT_PREF, NOT_SUPPORTED, "pref" },
311 /* RFC3312: Precondition support */
312 { SIP_OPT_PRECONDITION, NOT_SUPPORTED, "precondition" },
313 /* RFC3323: Privacy with proxies*/
314 { SIP_OPT_PRIVACY, NOT_SUPPORTED, "privacy" },
315 /* RFC4092: Usage of the SDP ANAT Semantics in the SIP */
316 { SIP_OPT_SDP_ANAT, NOT_SUPPORTED, "sdp-anat" },
317 /* RFC3329: Security agreement mechanism */
318 { SIP_OPT_SEC_AGREE, NOT_SUPPORTED, "sec_agree" },
319 /* SIMPLE events: draft-ietf-simple-event-list-07.txt */
320 { SIP_OPT_EVENTLIST, NOT_SUPPORTED, "eventlist" },
321 /* GRUU: Globally Routable User Agent URI's */
322 { SIP_OPT_GRUU, NOT_SUPPORTED, "gruu" },
323 /* Target-dialog: draft-ietf-sip-target-dialog-00.txt */
324 { SIP_OPT_TARGET_DIALOG,NOT_SUPPORTED, "target-dialog" },
328 /*! \brief SIP Methods we support */
329 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY"
331 /*! \brief SIP Extensions we support */
332 #define SUPPORTED_EXTENSIONS "replaces"
334 #define DEFAULT_SIP_PORT 5060 /*!< From RFC 3261 (former 2543) */
335 #define SIP_MAX_PACKET 4096 /*!< Also from RFC 3261 (2543), should sub headers tho */
337 static char default_useragent[AST_MAX_EXTENSION] = DEFAULT_USERAGENT;
339 #define DEFAULT_CONTEXT "default"
340 static char default_context[AST_MAX_CONTEXT] = DEFAULT_CONTEXT;
341 static char default_subscribecontext[AST_MAX_CONTEXT];
343 #define DEFAULT_VMEXTEN "asterisk"
344 static char global_vmexten[AST_MAX_EXTENSION] = DEFAULT_VMEXTEN;
346 static char default_language[MAX_LANGUAGE] = "";
348 #define DEFAULT_CALLERID "asterisk"
349 static char default_callerid[AST_MAX_EXTENSION] = DEFAULT_CALLERID;
351 static char default_fromdomain[AST_MAX_EXTENSION] = "";
353 #define DEFAULT_NOTIFYMIME "application/simple-message-summary"
354 static char default_notifymime[AST_MAX_EXTENSION] = DEFAULT_NOTIFYMIME;
356 static int global_notifyringing = 1; /*!< Send notifications on ringing */
358 static int default_qualify = 0; /*!< Default Qualify= setting */
360 static struct ast_flags global_flags = {0}; /*!< global SIP_ flags */
361 static struct ast_flags global_flags_page2 = {0}; /*!< more global SIP_ flags */
363 static int srvlookup = 0; /*!< SRV Lookup on or off. Default is off, RFC behavior is on */
365 static int pedanticsipchecking = 0; /*!< Extra checking ? Default off */
367 static int autocreatepeer = 0; /*!< Auto creation of peers at registration? Default off. */
369 static int relaxdtmf = 0;
371 static int global_rtptimeout = 0;
373 static int global_rtpholdtimeout = 0;
375 static int global_rtpkeepalive = 0;
377 static int global_reg_timeout = DEFAULT_REGISTRATION_TIMEOUT;
378 static int global_regattempts_max = 0;
380 /* Object counters */
381 static int suserobjs = 0;
382 static int ruserobjs = 0;
383 static int speerobjs = 0;
384 static int rpeerobjs = 0;
385 static int apeerobjs = 0;
386 static int regobjs = 0;
388 static int global_allowguest = 1; /*!< allow unauthenticated users/peers to connect? */
390 #define DEFAULT_MWITIME 10
391 static int global_mwitime = DEFAULT_MWITIME; /*!< Time between MWI checks for peers */
393 static int usecnt =0;
394 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
396 AST_MUTEX_DEFINE_STATIC(rand_lock);
398 /*! \brief Protect the interface list (of sip_pvt's) */
399 AST_MUTEX_DEFINE_STATIC(iflock);
401 /*! \brief Protect the monitoring thread, so only one process can kill or start it, and not
402 when it's doing something critical. */
403 AST_MUTEX_DEFINE_STATIC(netlock);
405 AST_MUTEX_DEFINE_STATIC(monlock);
407 /*! \brief This is the thread for the monitor which checks for input on the channels
408 which are not currently in use. */
409 static pthread_t monitor_thread = AST_PTHREADT_NULL;
411 static int restart_monitor(void);
413 /*! \brief Codecs that we support by default: */
414 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
415 static int noncodeccapability = AST_RTP_DTMF;
417 static struct in_addr __ourip;
418 static struct sockaddr_in outboundproxyip;
421 static struct sockaddr_in debugaddr;
425 static int videosupport = 0;
427 static int compactheaders = 0; /*!< send compact sip headers */
429 static int recordhistory = 0; /*!< Record SIP history. Off by default */
430 static int dumphistory = 0; /*!< Dump history to verbose before destroying SIP dialog */
432 static char global_musicclass[MAX_MUSICCLASS] = ""; /*!< Global music on hold class */
433 #define DEFAULT_REALM "asterisk"
434 static char global_realm[MAXHOSTNAMELEN] = DEFAULT_REALM; /*!< Default realm */
435 static char regcontext[AST_MAX_CONTEXT] = ""; /*!< Context for auto-extensions */
437 #define DEFAULT_EXPIRY 900 /*!< Expire slowly */
438 static int expiry = DEFAULT_EXPIRY;
440 static struct sched_context *sched;
441 static struct io_context *io;
443 #define SIP_MAX_HEADERS 64 /*!< Max amount of SIP headers to read */
444 #define SIP_MAX_LINES 64 /*!< Max amount of lines in SIP attachment (like SDP) */
446 #define DEC_CALL_LIMIT 0
447 #define INC_CALL_LIMIT 1
449 static struct ast_codec_pref prefs;
452 /*! \brief sip_request: The data grabbed from the UDP socket */
454 char *rlPart1; /*!< SIP Method Name or "SIP/2.0" protocol version */
455 char *rlPart2; /*!< The Request URI or Response Status */
456 int len; /*!< Length */
457 int headers; /*!< # of SIP Headers */
458 int method; /*!< Method of this request */
459 char *header[SIP_MAX_HEADERS];
460 int lines; /*!< SDP Content */
461 char *line[SIP_MAX_LINES];
462 char data[SIP_MAX_PACKET];
463 int debug; /*!< Debug flag for this packet */
464 unsigned int flags; /*!< SIP_PKT Flags for this packet */
469 /*! \brief Parameters to the transmit_invite function */
470 struct sip_invite_param {
471 const char *distinctive_ring; /*!< Distinctive ring header */
472 char *osptoken; /*!< OSP token for this call */
473 int addsipheaders; /*!< Add extra SIP headers */
474 const char *uri_options; /*!< URI options to add to the URI */
475 const char *vxml_url; /*!< VXML url for Cisco phones */
476 char *auth; /*!< Authentication */
477 char *authheader; /*!< Auth header */
478 enum sip_auth_type auth_type; /*!< Authentication type */
482 struct sip_route *next;
487 SIP_DOMAIN_AUTO, /*!< This domain is auto-configured */
488 SIP_DOMAIN_CONFIG, /*!< This domain is from configuration */
492 char domain[MAXHOSTNAMELEN]; /*!< SIP domain we are responsible for */
493 char context[AST_MAX_EXTENSION]; /*!< Incoming context for this domain */
494 enum domain_mode mode; /*!< How did we find this domain? */
495 AST_LIST_ENTRY(domain) list; /*!< List mechanics */
498 static AST_LIST_HEAD_STATIC(domain_list, domain); /*!< The SIP domain list */
500 int allow_external_domains; /*!< Accept calls to external SIP domains? */
502 /*! \brief sip_history: Structure for saving transactions within a SIP dialog */
504 AST_LIST_ENTRY(sip_history) list;
505 char event[0]; /* actually more, depending on needs */
508 AST_LIST_HEAD_NOLOCK(sip_history_head, sip_history); /*!< history list, entry in sip_pvt */
510 /*! \brief sip_auth: Creadentials for authentication to other SIP services */
512 char realm[AST_MAX_EXTENSION]; /*!< Realm in which these credentials are valid */
513 char username[256]; /*!< Username */
514 char secret[256]; /*!< Secret */
515 char md5secret[256]; /*!< MD5Secret */
516 struct sip_auth *next; /*!< Next auth structure in list */
519 #define SIP_ALREADYGONE (1 << 0) /*!< Whether or not we've already been destroyed by our peer */
520 #define SIP_NEEDDESTROY (1 << 1) /*!< if we need to be destroyed */
521 #define SIP_NOVIDEO (1 << 2) /*!< Didn't get video in invite, don't offer */
522 #define SIP_RINGING (1 << 3) /*!< Have sent 180 ringing */
523 #define SIP_PROGRESS_SENT (1 << 4) /*!< Have sent 183 message progress */
524 #define SIP_NEEDREINVITE (1 << 5) /*!< Do we need to send another reinvite? */
525 #define SIP_PENDINGBYE (1 << 6) /*!< Need to send bye after we ack? */
526 #define SIP_GOTREFER (1 << 7) /*!< Got a refer? */
527 #define SIP_PROMISCREDIR (1 << 8) /*!< Promiscuous redirection */
528 #define SIP_TRUSTRPID (1 << 9) /*!< Trust RPID headers? */
529 #define SIP_USEREQPHONE (1 << 10) /*!< Add user=phone to numeric URI. Default off */
530 #define SIP_REALTIME (1 << 11) /*!< Flag for realtime users */
531 #define SIP_USECLIENTCODE (1 << 12) /*!< Trust X-ClientCode info message */
532 #define SIP_OUTGOING (1 << 13) /*!< Is this an outgoing call? */
533 #define SIP_SELFDESTRUCT (1 << 14)
534 #define SIP_DYNAMIC (1 << 15) /*!< Is this a dynamic peer? */
535 /* --- Choices for DTMF support in SIP channel */
536 #define SIP_DTMF (3 << 16) /*!< three settings, uses two bits */
537 #define SIP_DTMF_RFC2833 (0 << 16) /*!< RTP DTMF */
538 #define SIP_DTMF_INBAND (1 << 16) /*!< Inband audio, only for ULAW/ALAW */
539 #define SIP_DTMF_INFO (2 << 16) /*!< SIP Info messages */
540 #define SIP_DTMF_AUTO (3 << 16) /*!< AUTO switch between rfc2833 and in-band DTMF */
542 #define SIP_NAT (3 << 18) /*!< four settings, uses two bits */
543 #define SIP_NAT_NEVER (0 << 18) /*!< No nat support */
544 #define SIP_NAT_RFC3581 (1 << 18)
545 #define SIP_NAT_ROUTE (2 << 18)
546 #define SIP_NAT_ALWAYS (3 << 18)
547 /* re-INVITE related settings */
548 #define SIP_REINVITE (3 << 20) /*!< two bits used */
549 #define SIP_CAN_REINVITE (1 << 20) /*!< allow peers to be reinvited to send media directly p2p */
550 #define SIP_REINVITE_UPDATE (2 << 20) /*!< use UPDATE (RFC3311) when reinviting this peer */
551 /* "insecure" settings */
552 #define SIP_INSECURE_PORT (1 << 22) /*!< don't require matching port for incoming requests */
553 #define SIP_INSECURE_INVITE (1 << 23) /*!< don't require authentication for incoming INVITEs */
554 /* Sending PROGRESS in-band settings */
555 #define SIP_PROG_INBAND (3 << 24) /*!< three settings, uses two bits */
556 #define SIP_PROG_INBAND_NEVER (0 << 24)
557 #define SIP_PROG_INBAND_NO (1 << 24)
558 #define SIP_PROG_INBAND_YES (2 << 24)
559 /* Open Settlement Protocol authentication */
560 #define SIP_OSPAUTH (3 << 26) /*!< four settings, uses two bits */
561 #define SIP_OSPAUTH_NO (0 << 26)
562 #define SIP_OSPAUTH_GATEWAY (1 << 26)
563 #define SIP_OSPAUTH_PROXY (2 << 26)
564 #define SIP_OSPAUTH_EXCLUSIVE (3 << 26)
566 #define SIP_CALL_ONHOLD (1 << 28)
567 #define SIP_CALL_LIMIT (1 << 29)
568 /* Remote Party-ID Support */
569 #define SIP_SENDRPID (1 << 30)
571 #define SIP_FLAGS_TO_COPY \
572 (SIP_PROMISCREDIR | SIP_TRUSTRPID | SIP_SENDRPID | SIP_DTMF | SIP_REINVITE | \
573 SIP_PROG_INBAND | SIP_OSPAUTH | SIP_USECLIENTCODE | SIP_NAT | \
574 SIP_INSECURE_PORT | SIP_INSECURE_INVITE)
576 /* a new page of flags for peer */
577 #define SIP_PAGE2_RTCACHEFRIENDS (1 << 0)
578 #define SIP_PAGE2_RTUPDATE (1 << 1)
579 #define SIP_PAGE2_RTAUTOCLEAR (1 << 2)
580 #define SIP_PAGE2_IGNOREREGEXPIRE (1 << 3)
581 #define SIP_PAGE2_RT_FROMCONTACT (1 << 4)
582 #define SIP_PAGE2_DEBUG (3 << 5)
583 #define SIP_PAGE2_DEBUG_CONFIG (1 << 5)
584 #define SIP_PAGE2_DEBUG_CONSOLE (1 << 6)
586 /* SIP packet flags */
587 #define SIP_PKT_DEBUG (1 << 0) /*!< Debug this packet */
588 #define SIP_PKT_WITH_TOTAG (1 << 1) /*!< This packet has a to-tag */
590 #define sipdebug ast_test_flag(&global_flags_page2, SIP_PAGE2_DEBUG)
591 #define sipdebug_config ast_test_flag(&global_flags_page2, SIP_PAGE2_DEBUG_CONFIG)
592 #define sipdebug_console ast_test_flag(&global_flags_page2, SIP_PAGE2_DEBUG_CONSOLE)
594 static int global_rtautoclear = 120;
596 /*! \brief sip_pvt: PVT structures are used for each SIP conversation, ie. a call */
597 static struct sip_pvt {
598 ast_mutex_t lock; /*!< Channel private lock */
599 int method; /*!< SIP method of this packet */
600 AST_DECLARE_STRING_FIELDS(
601 AST_STRING_FIELD(callid); /*!< Global CallID */
602 AST_STRING_FIELD(randdata); /*!< Random data */
603 AST_STRING_FIELD(accountcode); /*!< Account code */
604 AST_STRING_FIELD(realm); /*!< Authorization realm */
605 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
606 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
607 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
608 AST_STRING_FIELD(domain); /*!< Authorization domain */
609 AST_STRING_FIELD(refer_to); /*!< Place to store REFER-TO extension */
610 AST_STRING_FIELD(referred_by); /*!< Place to store REFERRED-BY extension */
611 AST_STRING_FIELD(refer_contact);/*!< Place to store Contact info from a REFER extension */
612 AST_STRING_FIELD(from); /*!< The From: header */
613 AST_STRING_FIELD(useragent); /*!< User agent in SIP request */
614 AST_STRING_FIELD(exten); /*!< Extension where to start */
615 AST_STRING_FIELD(context); /*!< Context for this call */
616 AST_STRING_FIELD(subscribecontext); /*!< Subscribecontext */
617 AST_STRING_FIELD(fromdomain); /*!< Domain to show in the from field */
618 AST_STRING_FIELD(fromuser); /*!< User to show in the user field */
619 AST_STRING_FIELD(fromname); /*!< Name to show in the user field */
620 AST_STRING_FIELD(tohost); /*!< Host we should put in the "to" field */
621 AST_STRING_FIELD(language); /*!< Default language for this call */
622 AST_STRING_FIELD(musicclass); /*!< Music on Hold class */
623 AST_STRING_FIELD(rdnis); /*!< Referring DNIS */
624 AST_STRING_FIELD(theirtag); /*!< Their tag */
625 AST_STRING_FIELD(username); /*!< [user] name */
626 AST_STRING_FIELD(peername); /*!< [peer] name, not set if [user] */
627 AST_STRING_FIELD(authname); /*!< Who we use for authentication */
628 AST_STRING_FIELD(uri); /*!< Original requested URI */
629 AST_STRING_FIELD(okcontacturi); /*!< URI from the 200 OK on INVITE */
630 AST_STRING_FIELD(peersecret); /*!< Password */
631 AST_STRING_FIELD(peermd5secret);
632 AST_STRING_FIELD(cid_num); /*!< Caller*ID */
633 AST_STRING_FIELD(cid_name); /*!< Caller*ID */
634 AST_STRING_FIELD(via); /*!< Via: header */
635 AST_STRING_FIELD(fullcontact); /*!< The Contact: that the UA registers with us */
636 AST_STRING_FIELD(our_contact); /*!< Our contact header */
637 AST_STRING_FIELD(rpid); /*!< Our RPID header */
638 AST_STRING_FIELD(rpid_from); /*!< Our RPID From header */
640 struct ast_codec_pref prefs; /*!< codec prefs */
641 unsigned int ocseq; /*!< Current outgoing seqno */
642 unsigned int icseq; /*!< Current incoming seqno */
643 ast_group_t callgroup; /*!< Call group */
644 ast_group_t pickupgroup; /*!< Pickup group */
645 int lastinvite; /*!< Last Cseq of invite */
646 unsigned int flags; /*!< SIP_ flags */
647 int timer_t1; /*!< SIP timer T1, ms rtt */
648 unsigned int sipoptions; /*!< Supported SIP sipoptions on the other end */
649 int capability; /*!< Special capability (codec) */
650 int jointcapability; /*!< Supported capability at both ends (codecs ) */
651 int peercapability; /*!< Supported peer capability */
652 int prefcodec; /*!< Preferred codec (outbound only) */
653 int noncodeccapability;
654 int callingpres; /*!< Calling presentation */
655 int authtries; /*!< Times we've tried to authenticate */
656 int expiry; /*!< How long we take to expire */
657 int branch; /*!< One random number */
658 char tag[11]; /*!< Another random number */
659 int sessionid; /*!< SDP Session ID */
660 int sessionversion; /*!< SDP Session Version */
661 struct sockaddr_in sa; /*!< Our peer */
662 struct sockaddr_in redirip; /*!< Where our RTP should be going if not to us */
663 struct sockaddr_in vredirip; /*!< Where our Video RTP should be going if not to us */
664 int redircodecs; /*!< Redirect codecs */
665 struct sockaddr_in recv; /*!< Received as */
666 struct in_addr ourip; /*!< Our IP */
667 struct ast_channel *owner; /*!< Who owns us */
668 struct sip_pvt *refer_call; /*!< Call we are referring */
669 struct sip_route *route; /*!< Head of linked list of routing steps (fm Record-Route) */
670 int route_persistant; /*!< Is this the "real" route? */
671 struct sip_auth *peerauth; /*!< Realm authentication */
672 int noncecount; /*!< Nonce-count */
673 char lastmsg[256]; /*!< Last Message sent/received */
674 int amaflags; /*!< AMA Flags */
675 int pendinginvite; /*!< Any pending invite */
677 int osphandle; /*!< OSP Handle for call */
678 time_t ospstart; /*!< OSP Start time */
679 unsigned int osptimelimit; /*!< OSP call duration limit */
681 struct sip_request initreq; /*!< Initial request */
683 int maxtime; /*!< Max time for first response */
684 int initid; /*!< Auto-congest ID if appropriate */
685 int autokillid; /*!< Auto-kill ID */
686 time_t lastrtprx; /*!< Last RTP received */
687 time_t lastrtptx; /*!< Last RTP sent */
688 int rtptimeout; /*!< RTP timeout time */
689 int rtpholdtimeout; /*!< RTP timeout when on hold */
690 int rtpkeepalive; /*!< Send RTP packets for keepalive */
691 enum subscriptiontype subscribed; /*!< Is this call a subscription? */
693 int laststate; /*!< Last known extension state */
696 struct ast_dsp *vad; /*!< Voice Activation Detection dsp */
698 struct sip_peer *peerpoke; /*!< If this calls is to poke a peer, which one */
699 struct sip_registry *registry; /*!< If this is a REGISTER call, to which registry */
700 struct ast_rtp *rtp; /*!< RTP Session */
701 struct ast_rtp *vrtp; /*!< Video RTP session */
702 struct sip_pkt *packets; /*!< Packets scheduled for re-transmission */
703 struct sip_history_head *history; /*!< History of this SIP dialog */
704 struct ast_variable *chanvars; /*!< Channel variables to set for call */
705 struct sip_pvt *next; /*!< Next call in chain */
706 struct sip_invite_param *options; /*!< Options for INVITE */
709 #define FLAG_RESPONSE (1 << 0)
710 #define FLAG_FATAL (1 << 1)
712 /*! \brief sip packet - read in sipsock_read, transmitted in send_request */
714 struct sip_pkt *next; /*!< Next packet */
715 int retrans; /*!< Retransmission number */
716 int method; /*!< SIP method for this packet */
717 int seqno; /*!< Sequence number */
718 unsigned int flags; /*!< non-zero if this is a response packet (e.g. 200 OK) */
719 struct sip_pvt *owner; /*!< Owner call */
720 int retransid; /*!< Retransmission ID */
721 int timer_a; /*!< SIP timer A, retransmission timer */
722 int timer_t1; /*!< SIP Timer T1, estimated RTT or 500 ms */
723 int packetlen; /*!< Length of packet */
727 /*! \brief Structure for SIP user data. User's place calls to us */
729 /* Users who can access various contexts */
730 ASTOBJ_COMPONENTS(struct sip_user);
731 char secret[80]; /*!< Password */
732 char md5secret[80]; /*!< Password in md5 */
733 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
734 char subscribecontext[AST_MAX_CONTEXT]; /* Default context for subscriptions */
735 char cid_num[80]; /*!< Caller ID num */
736 char cid_name[80]; /*!< Caller ID name */
737 char accountcode[AST_MAX_ACCOUNT_CODE]; /* Account code */
738 char language[MAX_LANGUAGE]; /*!< Default language for this user */
739 char musicclass[MAX_MUSICCLASS];/*!< Music on Hold class */
740 char useragent[256]; /*!< User agent in SIP request */
741 struct ast_codec_pref prefs; /*!< codec prefs */
742 ast_group_t callgroup; /*!< Call group */
743 ast_group_t pickupgroup; /*!< Pickup Group */
744 unsigned int flags; /*!< SIP flags */
745 unsigned int sipoptions; /*!< Supported SIP options */
746 struct ast_flags flags_page2; /*!< SIP_PAGE2 flags */
747 int amaflags; /*!< AMA flags for billing */
748 int callingpres; /*!< Calling id presentation */
749 int capability; /*!< Codec capability */
750 int inUse; /*!< Number of calls in use */
751 int call_limit; /*!< Limit of concurrent calls */
752 struct ast_ha *ha; /*!< ACL setting */
753 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
756 /* Structure for SIP peer data, we place calls to peers if registered or fixed IP address (host) */
758 ASTOBJ_COMPONENTS(struct sip_peer); /*!< name, refcount, objflags, object pointers */
759 /*!< peer->name is the unique name of this object */
760 char secret[80]; /*!< Password */
761 char md5secret[80]; /*!< Password in MD5 */
762 struct sip_auth *auth; /*!< Realm authentication list */
763 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
764 char subscribecontext[AST_MAX_CONTEXT]; /*!< Default context for subscriptions */
765 char username[80]; /*!< Temporary username until registration */
766 char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
767 int amaflags; /*!< AMA Flags (for billing) */
768 char tohost[MAXHOSTNAMELEN]; /*!< If not dynamic, IP address */
769 char regexten[AST_MAX_EXTENSION]; /*!< Extension to register (if regcontext is used) */
770 char fromuser[80]; /*!< From: user when calling this peer */
771 char fromdomain[MAXHOSTNAMELEN]; /*!< From: domain when calling this peer */
772 char fullcontact[256]; /*!< Contact registered with us (not in sip.conf) */
773 char cid_num[80]; /*!< Caller ID num */
774 char cid_name[80]; /*!< Caller ID name */
775 int callingpres; /*!< Calling id presentation */
776 int inUse; /*!< Number of calls in use */
777 int call_limit; /*!< Limit of concurrent calls */
778 char vmexten[AST_MAX_EXTENSION]; /*!< Dialplan extension for MWI notify message*/
779 char mailbox[AST_MAX_EXTENSION]; /*!< Mailbox setting for MWI checks */
780 char language[MAX_LANGUAGE]; /*!< Default language for prompts */
781 char musicclass[MAX_MUSICCLASS];/*!< Music on Hold class */
782 char useragent[256]; /*!< User agent in SIP request (saved from registration) */
783 struct ast_codec_pref prefs; /*!< codec prefs */
785 time_t lastmsgcheck; /*!< Last time we checked for MWI */
786 unsigned int flags; /*!< SIP flags */
787 unsigned int sipoptions; /*!< Supported SIP options */
788 struct ast_flags flags_page2; /*!< SIP_PAGE2 flags */
789 int expire; /*!< When to expire this peer registration */
790 int capability; /*!< Codec capability */
791 int rtptimeout; /*!< RTP timeout */
792 int rtpholdtimeout; /*!< RTP Hold Timeout */
793 int rtpkeepalive; /*!< Send RTP packets for keepalive */
794 ast_group_t callgroup; /*!< Call group */
795 ast_group_t pickupgroup; /*!< Pickup group */
796 struct ast_dnsmgr_entry *dnsmgr;/*!< DNS refresh manager for peer */
797 struct sockaddr_in addr; /*!< IP address of peer */
800 struct sip_pvt *call; /*!< Call pointer */
801 int pokeexpire; /*!< When to expire poke (qualify= checking) */
802 int lastms; /*!< How long last response took (in ms), or -1 for no response */
803 int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */
804 struct timeval ps; /*!< Ping send time */
806 struct sockaddr_in defaddr; /*!< Default IP address, used until registration */
807 struct ast_ha *ha; /*!< Access control list */
808 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
812 AST_MUTEX_DEFINE_STATIC(sip_reload_lock);
813 static int sip_reloading = 0;
815 /* States for outbound registrations (with register= lines in sip.conf */
816 #define REG_STATE_UNREGISTERED 0
817 #define REG_STATE_REGSENT 1
818 #define REG_STATE_AUTHSENT 2
819 #define REG_STATE_REGISTERED 3
820 #define REG_STATE_REJECTED 4
821 #define REG_STATE_TIMEOUT 5
822 #define REG_STATE_NOAUTH 6
823 #define REG_STATE_FAILED 7
826 /*! \brief sip_registry: Registrations with other SIP proxies */
827 struct sip_registry {
828 ASTOBJ_COMPONENTS_FULL(struct sip_registry,1,1);
829 AST_DECLARE_STRING_FIELDS(
830 AST_STRING_FIELD(callid); /*!< Global Call-ID */
831 AST_STRING_FIELD(realm); /*!< Authorization realm */
832 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
833 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
834 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
835 AST_STRING_FIELD(domain); /*!< Authorization domain */
836 AST_STRING_FIELD(username); /*!< Who we are registering as */
837 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
838 AST_STRING_FIELD(hostname); /*!< Domain or host we register to */
839 AST_STRING_FIELD(secret); /*!< Password in clear text */
840 AST_STRING_FIELD(md5secret); /*!< Password in md5 */
841 AST_STRING_FIELD(contact); /*!< Contact extension */
842 AST_STRING_FIELD(random);
844 int portno; /*!< Optional port override */
845 int expire; /*!< Sched ID of expiration */
846 int regattempts; /*!< Number of attempts (since the last success) */
847 int timeout; /*!< sched id of sip_reg_timeout */
848 int refresh; /*!< How often to refresh */
849 struct sip_pvt *call; /*!< create a sip_pvt structure for each outbound "registration call" in progress */
850 int regstate; /*!< Registration state (see above) */
851 int callid_valid; /*!< 0 means we haven't chosen callid for this registry yet. */
852 unsigned int ocseq; /*!< Sequence number we got to for REGISTERs for this registry */
853 struct sockaddr_in us; /*!< Who the server thinks we are */
854 int noncecount; /*!< Nonce-count */
855 char lastmsg[256]; /*!< Last Message sent/received */
858 /*! \brief The user list: Users and friends ---*/
859 static struct ast_user_list {
860 ASTOBJ_CONTAINER_COMPONENTS(struct sip_user);
863 /*! \brief The peer list: Peers and Friends ---*/
864 static struct ast_peer_list {
865 ASTOBJ_CONTAINER_COMPONENTS(struct sip_peer);
868 /*! \brief The register list: Other SIP proxys we register with and call ---*/
869 static struct ast_register_list {
870 ASTOBJ_CONTAINER_COMPONENTS(struct sip_registry);
875 static int __sip_do_register(struct sip_registry *r);
877 static int sipsock = -1;
880 static struct sockaddr_in bindaddr = { 0, };
881 static struct sockaddr_in externip;
882 static char externhost[MAXHOSTNAMELEN] = "";
883 static time_t externexpire = 0;
884 static int externrefresh = 10;
885 static struct ast_ha *localaddr;
886 static int callevents; /*!< Whether we send manager events or not */
888 /* The list of manual NOTIFY types we know how to send */
889 struct ast_config *notify_types;
891 static struct sip_auth *authl = NULL; /*!< Authentication list */
894 static int transmit_response(struct sip_pvt *p, char *msg, struct sip_request *req);
895 static int transmit_response_with_sdp(struct sip_pvt *p, char *msg, struct sip_request *req, int retrans);
896 static int transmit_response_with_unsupported(struct sip_pvt *p, char *msg, struct sip_request *req, char *unsupported);
897 static int transmit_response_with_auth(struct sip_pvt *p, char *msg, struct sip_request *req, const char *rand, int reliable, char *header, int stale);
898 static int transmit_request(struct sip_pvt *p, int sipmethod, int inc, int reliable, int newbranch);
899 static int transmit_request_with_auth(struct sip_pvt *p, int sipmethod, int inc, int reliable, int newbranch);
900 static int transmit_invite(struct sip_pvt *p, int sipmethod, int sendsdp, int init);
901 static int transmit_reinvite_with_sdp(struct sip_pvt *p);
902 static int transmit_info_with_digit(struct sip_pvt *p, char digit);
903 static int transmit_info_with_vidupdate(struct sip_pvt *p);
904 static int transmit_message_with_text(struct sip_pvt *p, const char *text);
905 static int transmit_refer(struct sip_pvt *p, const char *dest);
906 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
907 static struct sip_peer *temp_peer(const char *name);
908 static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, int sipmethod, int init);
909 static void free_old_route(struct sip_route *route);
910 static int build_reply_digest(struct sip_pvt *p, int method, char *digest, int digest_len);
911 static int update_call_counter(struct sip_pvt *fup, int event);
912 static struct sip_peer *build_peer(const char *name, struct ast_variable *v, int realtime);
913 static struct sip_user *build_user(const char *name, struct ast_variable *v, int realtime);
914 static int sip_do_reload(void);
915 static int expire_register(void *data);
917 static struct ast_channel *sip_request_call(const char *type, int format, void *data, int *cause);
918 static int sip_devicestate(void *data);
919 static int sip_sendtext(struct ast_channel *ast, const char *text);
920 static int sip_call(struct ast_channel *ast, char *dest, int timeout);
921 static int sip_hangup(struct ast_channel *ast);
922 static int sip_answer(struct ast_channel *ast);
923 static struct ast_frame *sip_read(struct ast_channel *ast);
924 static int sip_write(struct ast_channel *ast, struct ast_frame *frame);
925 static int sip_indicate(struct ast_channel *ast, int condition);
926 static int sip_transfer(struct ast_channel *ast, const char *dest);
927 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
928 static int sip_senddigit(struct ast_channel *ast, char digit);
929 static int clear_realm_authentication(struct sip_auth *authlist); /* Clear realm authentication list (at reload) */
930 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, char *configuration, int lineno); /* Add realm authentication in list */
931 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, const char *realm); /* Find authentication for a specific realm */
932 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */
933 static void append_date(struct sip_request *req); /* Append date to SIP packet */
934 static int determine_firstline_parts(struct sip_request *req);
935 static void sip_dump_history(struct sip_pvt *dialog); /* Dump history to LOG_DEBUG at end of dialog, before destroying data */
936 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
937 static int transmit_state_notify(struct sip_pvt *p, int state, int full, int substate);
938 static char *gettag(struct sip_request *req, char *header, char *tagbuf, int tagbufsize);
939 int find_sip_method(char *msg);
940 unsigned int parse_sip_options(struct sip_pvt *pvt, char *supported);
942 /*! \brief Definition of this channel for PBX channel registration */
943 static const struct ast_channel_tech sip_tech = {
945 .description = "Session Initiation Protocol (SIP)",
946 .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
947 .properties = AST_CHAN_TP_WANTSJITTER,
948 .requester = sip_request_call,
949 .devicestate = sip_devicestate,
951 .hangup = sip_hangup,
952 .answer = sip_answer,
955 .write_video = sip_write,
956 .indicate = sip_indicate,
957 .transfer = sip_transfer,
959 .send_digit = sip_senddigit,
960 .bridge = ast_rtp_bridge,
961 .send_text = sip_sendtext,
965 \brief Thread-safe random number generator
966 \return a random number
968 This function uses a mutex lock to guarantee that no
969 two threads will receive the same random number.
971 static force_inline int thread_safe_rand(void)
975 ast_mutex_lock(&rand_lock);
977 ast_mutex_unlock(&rand_lock);
982 /*! \brief find_sip_method: Find SIP method from header
983 * Strictly speaking, SIP methods are case SENSITIVE, but we don't check
984 * following Jon Postel's rule: Be gentle in what you accept, strict with what you send */
985 int find_sip_method(char *msg)
989 if (ast_strlen_zero(msg))
992 for (i = 1; (i < (sizeof(sip_methods) / sizeof(sip_methods[0]))) && !res; i++) {
993 if (!strcasecmp(sip_methods[i].text, msg))
994 res = sip_methods[i].id;
999 /*! \brief parse_sip_options: Parse supported header in incoming packet */
1000 unsigned int parse_sip_options(struct sip_pvt *pvt, char *supported)
1004 char *temp = ast_strdupa(supported);
1006 unsigned int profile = 0;
1008 if (ast_strlen_zero(supported) )
1011 if (option_debug > 2 && sipdebug)
1012 ast_log(LOG_DEBUG, "Begin: parsing SIP \"Supported: %s\"\n", supported);
1017 if ( (sep = strchr(next, ',')) != NULL) {
1021 while (*next == ' ') /* Skip spaces */
1023 if (option_debug > 2 && sipdebug)
1024 ast_log(LOG_DEBUG, "Found SIP option: -%s-\n", next);
1025 for (i=0; (i < (sizeof(sip_options) / sizeof(sip_options[0]))) && !res; i++) {
1026 if (!strcasecmp(next, sip_options[i].text)) {
1027 profile |= sip_options[i].id;
1029 if (option_debug > 2 && sipdebug)
1030 ast_log(LOG_DEBUG, "Matched SIP option: %s\n", next);
1034 if (option_debug > 2 && sipdebug)
1035 ast_log(LOG_DEBUG, "Found no match for SIP option: %s (Please file bug report!)\n", next);
1039 pvt->sipoptions = profile;
1041 ast_log(LOG_DEBUG, "* SIP extension value: %d for call %s\n", profile, pvt->callid);
1046 /*! \brief sip_debug_test_addr: See if we pass debug IP filter */
1047 static inline int sip_debug_test_addr(struct sockaddr_in *addr)
1051 if (debugaddr.sin_addr.s_addr) {
1052 if (((ntohs(debugaddr.sin_port) != 0)
1053 && (debugaddr.sin_port != addr->sin_port))
1054 || (debugaddr.sin_addr.s_addr != addr->sin_addr.s_addr))
1060 /*! \brief sip_debug_test_pvt: Test PVT for debugging output */
1061 static inline int sip_debug_test_pvt(struct sip_pvt *p)
1065 return sip_debug_test_addr(((ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE) ? &p->recv : &p->sa));
1069 /*! \brief __sip_xmit: Transmit SIP message ---*/
1070 static int __sip_xmit(struct sip_pvt *p, char *data, int len)
1073 char iabuf[INET_ADDRSTRLEN];
1075 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE)
1076 res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->recv, sizeof(struct sockaddr_in));
1078 res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->sa, sizeof(struct sockaddr_in));
1081 ast_log(LOG_WARNING, "sip_xmit of %p (len %d) to %s:%d returned %d: %s\n", data, len, ast_inet_ntoa(iabuf, sizeof(iabuf), p->sa.sin_addr), ntohs(p->sa.sin_port), res, strerror(errno));
1086 static void sip_destroy(struct sip_pvt *p);
1088 /*! \brief build_via: Build a Via header for a request ---*/
1089 static void build_via(struct sip_pvt *p)
1091 char iabuf[INET_ADDRSTRLEN];
1092 /* Work around buggy UNIDEN UIP200 firmware */
1093 const char *rport = ast_test_flag(p, SIP_NAT) & SIP_NAT_RFC3581 ? ";rport" : "";
1095 /* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
1096 ast_string_field_build(p, via, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x%s",
1097 ast_inet_ntoa(iabuf, sizeof(iabuf), p->ourip), ourport, p->branch, rport);
1100 /*! \brief ast_sip_ouraddrfor: NAT fix - decide which IP address to use for ASterisk server? ---*/
1101 /* Only used for outbound registrations */
1102 static int ast_sip_ouraddrfor(struct in_addr *them, struct in_addr *us)
1105 * Using the localaddr structure built up with localnet statements
1106 * apply it to their address to see if we need to substitute our
1107 * externip or can get away with our internal bindaddr
1109 struct sockaddr_in theirs;
1110 theirs.sin_addr = *them;
1111 if (localaddr && externip.sin_addr.s_addr &&
1112 ast_apply_ha(localaddr, &theirs)) {
1113 char iabuf[INET_ADDRSTRLEN];
1114 if (externexpire && (time(NULL) >= externexpire)) {
1115 struct ast_hostent ahp;
1117 time(&externexpire);
1118 externexpire += externrefresh;
1119 if ((hp = ast_gethostbyname(externhost, &ahp))) {
1120 memcpy(&externip.sin_addr, hp->h_addr, sizeof(externip.sin_addr));
1122 ast_log(LOG_NOTICE, "Warning: Re-lookup of '%s' failed!\n", externhost);
1124 memcpy(us, &externip.sin_addr, sizeof(struct in_addr));
1125 ast_inet_ntoa(iabuf, sizeof(iabuf), *(struct in_addr *)&them->s_addr);
1126 ast_log(LOG_DEBUG, "Target address %s is not local, substituting externip\n", iabuf);
1128 else if (bindaddr.sin_addr.s_addr)
1129 memcpy(us, &bindaddr.sin_addr, sizeof(struct in_addr));
1131 return ast_ouraddrfor(them, us);
1135 /*! \brief append_history: Append to SIP dialog history
1136 \return Always returns 0 */
1137 #define append_history(p, event, fmt , args... ) append_history_full(p, "%-15s " fmt, event, ## args)
1139 static int append_history_full(struct sip_pvt *p, const char *fmt, ...)
1140 __attribute__ ((format (printf, 2, 3)));
1142 /*! \brief Append to SIP dialog history with arg list */
1143 static void append_history_va(struct sip_pvt *p, const char *fmt, va_list ap)
1145 char buf[80], *c = buf; /* max history length */
1146 struct sip_history *hist;
1149 vsnprintf(buf, sizeof(buf), fmt, ap);
1150 strsep(&c, "\r\n"); /* Trim up everything after \r or \n */
1151 l = strlen(buf) + 1;
1152 if (!(hist = ast_calloc(1, sizeof(*hist) + l)))
1154 if (!p->history && !(p->history = ast_calloc(1, sizeof(*p->history)))) {
1158 memcpy(hist->event, buf, l);
1159 AST_LIST_INSERT_TAIL(p->history, hist, list);
1162 /*! \brief Append to SIP dialog history with arg list */
1163 static int append_history_full(struct sip_pvt *p, const char *fmt, ...)
1167 if (!recordhistory || !p)
1170 append_history_va(p, fmt, ap);
1176 /*! \brief retrans_pkt: Retransmit SIP message if no answer ---*/
1177 static int retrans_pkt(void *data)
1179 struct sip_pkt *pkt=data, *prev, *cur = NULL;
1180 char iabuf[INET_ADDRSTRLEN];
1181 int reschedule = DEFAULT_RETRANS;
1184 ast_mutex_lock(&pkt->owner->lock);
1186 if (pkt->retrans < MAX_RETRANS) {
1188 if (!pkt->timer_t1) { /* Re-schedule using timer_a and timer_t1 */
1189 if (sipdebug && option_debug > 3)
1190 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);
1194 if (sipdebug && option_debug > 3)
1195 ast_log(LOG_DEBUG, "SIP TIMER: Rescheduling retransmission #%d (%d) %s - %d\n", pkt->retransid, pkt->retrans, sip_methods[pkt->method].text, pkt->method);
1199 pkt->timer_a = 2 * pkt->timer_a;
1201 /* For non-invites, a maximum of 4 secs */
1202 siptimer_a = pkt->timer_t1 * pkt->timer_a; /* Double each time */
1203 if (pkt->method != SIP_INVITE && siptimer_a > 4000)
1206 /* Reschedule re-transmit */
1207 reschedule = siptimer_a;
1208 if (option_debug > 3)
1209 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);
1212 if (pkt->owner && sip_debug_test_pvt(pkt->owner)) {
1213 if (ast_test_flag(pkt->owner, SIP_NAT) & SIP_NAT_ROUTE)
1214 ast_verbose("Retransmitting #%d (NAT) to %s:%d:\n%s\n---\n", pkt->retrans, ast_inet_ntoa(iabuf, sizeof(iabuf), pkt->owner->recv.sin_addr), ntohs(pkt->owner->recv.sin_port), pkt->data);
1216 ast_verbose("Retransmitting #%d (no NAT) to %s:%d:\n%s\n---\n", pkt->retrans, ast_inet_ntoa(iabuf, sizeof(iabuf), pkt->owner->sa.sin_addr), ntohs(pkt->owner->sa.sin_port), pkt->data);
1219 append_history(pkt->owner, "ReTx", "%d %s", reschedule, pkt->data);
1220 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen);
1221 ast_mutex_unlock(&pkt->owner->lock);
1224 /* Too many retries */
1225 if (pkt->owner && pkt->method != SIP_OPTIONS) {
1226 if (ast_test_flag(pkt, FLAG_FATAL) || sipdebug) /* Tell us if it's critical or if we're debugging */ 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"); } else {
1227 if ((pkt->method == SIP_OPTIONS) && sipdebug)
1228 ast_log(LOG_WARNING, "Cancelling retransmit of OPTIONs (call id %s) \n", pkt->owner->callid);
1230 append_history(pkt->owner, "MaxRetries", "%s", (ast_test_flag(pkt, FLAG_FATAL)) ? "(Critical)" : "(Non-critical)");
1232 pkt->retransid = -1;
1234 if (ast_test_flag(pkt, FLAG_FATAL)) {
1235 while(pkt->owner->owner && ast_mutex_trylock(&pkt->owner->owner->lock)) {
1236 ast_mutex_unlock(&pkt->owner->lock);
1238 ast_mutex_lock(&pkt->owner->lock);
1240 if (pkt->owner->owner) {
1241 ast_set_flag(pkt->owner, SIP_ALREADYGONE);
1242 ast_log(LOG_WARNING, "Hanging up call %s - no reply to our critical packet.\n", pkt->owner->callid);
1243 ast_queue_hangup(pkt->owner->owner);
1244 ast_mutex_unlock(&pkt->owner->owner->lock);
1246 /* If no channel owner, destroy now */
1247 ast_set_flag(pkt->owner, SIP_NEEDDESTROY);
1250 /* In any case, go ahead and remove the packet */
1252 cur = pkt->owner->packets;
1261 prev->next = cur->next;
1263 pkt->owner->packets = cur->next;
1264 ast_mutex_unlock(&pkt->owner->lock);
1268 ast_log(LOG_WARNING, "Weird, couldn't find packet owner!\n");
1270 ast_mutex_unlock(&pkt->owner->lock);
1274 /*! \brief __sip_reliable_xmit: transmit packet with retransmits ---*/
1275 static int __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, char *data, int len, int fatal, int sipmethod)
1277 struct sip_pkt *pkt;
1278 int siptimer_a = DEFAULT_RETRANS;
1280 if (!(pkt = ast_calloc(1, sizeof(*pkt) + len + 1)))
1282 memcpy(pkt->data, data, len);
1283 pkt->method = sipmethod;
1284 pkt->packetlen = len;
1285 pkt->next = p->packets;
1289 pkt->data[len] = '\0';
1290 pkt->timer_t1 = p->timer_t1; /* Set SIP timer T1 */
1292 ast_set_flag(pkt, FLAG_FATAL);
1294 siptimer_a = pkt->timer_t1 * 2;
1296 /* Schedule retransmission */
1297 pkt->retransid = ast_sched_add_variable(sched, siptimer_a, retrans_pkt, pkt, 1);
1298 if (option_debug > 3 && sipdebug)
1299 ast_log(LOG_DEBUG, "*** SIP TIMER: Initalizing retransmit timer on packet: Id #%d\n", pkt->retransid);
1300 pkt->next = p->packets;
1303 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen); /* Send packet */
1304 if (sipmethod == SIP_INVITE) {
1305 /* Note this is a pending invite */
1306 p->pendinginvite = seqno;
1311 /*! \brief __sip_autodestruct: Kill a call (called by scheduler) ---*/
1312 static int __sip_autodestruct(void *data)
1314 struct sip_pvt *p = data;
1318 /* If this is a subscription, tell the phone that we got a timeout */
1319 if (p->subscribed) {
1320 p->subscribed = TIMEOUT;
1321 transmit_state_notify(p, AST_EXTENSION_DEACTIVATED, 1, 1); /* Send first notification */
1322 p->subscribed = NONE;
1323 append_history(p, "Subscribestatus", "timeout");
1324 return 10000; /* Reschedule this destruction so that we know that it's gone */
1326 ast_log(LOG_DEBUG, "Auto destroying call '%s'\n", p->callid);
1327 append_history(p, "AutoDestroy", "");
1329 ast_log(LOG_WARNING, "Autodestruct on call '%s' with owner in place\n", p->callid);
1330 ast_queue_hangup(p->owner);
1337 /*! \brief sip_scheddestroy: Schedule destruction of SIP call ---*/
1338 static int sip_scheddestroy(struct sip_pvt *p, int ms)
1340 if (sip_debug_test_pvt(p))
1341 ast_verbose("Scheduling destruction of call '%s' in %d ms\n", p->callid, ms);
1343 append_history(p, "SchedDestroy", "%d ms", ms);
1345 if (p->autokillid > -1)
1346 ast_sched_del(sched, p->autokillid);
1347 p->autokillid = ast_sched_add(sched, ms, __sip_autodestruct, p);
1351 /*! \brief sip_cancel_destroy: Cancel destruction of SIP call ---*/
1352 static int sip_cancel_destroy(struct sip_pvt *p)
1354 if (p->autokillid > -1)
1355 ast_sched_del(sched, p->autokillid);
1356 append_history(p, "CancelDestroy", "");
1361 /*! \brief __sip_ack: Acknowledges receipt of a packet and stops retransmission ---*/
1362 static int __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
1364 struct sip_pkt *cur, *prev = NULL;
1366 int resetinvite = 0;
1367 /* Just in case... */
1370 msg = sip_methods[sipmethod].text;
1374 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1375 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1376 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1377 ast_mutex_lock(&p->lock);
1378 if (!resp && (seqno == p->pendinginvite)) {
1379 ast_log(LOG_DEBUG, "Acked pending invite %d\n", p->pendinginvite);
1380 p->pendinginvite = 0;
1383 /* this is our baby */
1385 prev->next = cur->next;
1387 p->packets = cur->next;
1388 if (cur->retransid > -1) {
1389 if (sipdebug && option_debug > 3)
1390 ast_log(LOG_DEBUG, "** SIP TIMER: Cancelling retransmit of packet (reply received) Retransid #%d\n", cur->retransid);
1391 ast_sched_del(sched, cur->retransid);
1394 ast_mutex_unlock(&p->lock);
1401 ast_log(LOG_DEBUG, "Stopping retransmission on '%s' of %s %d: Match %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
1405 /* Pretend to ack all packets */
1406 static int __sip_pretend_ack(struct sip_pvt *p)
1408 struct sip_pkt *cur=NULL;
1411 if (cur == p->packets) {
1412 ast_log(LOG_WARNING, "Have a packet that doesn't want to give up! %s\n", sip_methods[cur->method].text);
1417 __sip_ack(p, p->packets->seqno, (ast_test_flag(p->packets, FLAG_RESPONSE)), cur->method);
1418 else { /* Unknown packet type */
1421 ast_copy_string(method, p->packets->data, sizeof(method));
1422 c = ast_skip_blanks(method); /* XXX what ? */
1424 __sip_ack(p, p->packets->seqno, (ast_test_flag(p->packets, FLAG_RESPONSE)), find_sip_method(method));
1430 /*! \brief __sip_semi_ack: Acks receipt of packet, keep it around (used for provisional responses) ---*/
1431 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
1433 struct sip_pkt *cur;
1435 char *msg = sip_methods[sipmethod].text;
1439 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1440 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1441 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1442 /* this is our baby */
1443 if (cur->retransid > -1) {
1444 if (option_debug > 3 && sipdebug)
1445 ast_log(LOG_DEBUG, "*** SIP TIMER: Cancelling retransmission #%d - %s (got response)\n", cur->retransid, msg);
1446 ast_sched_del(sched, cur->retransid);
1448 cur->retransid = -1;
1454 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");
1458 static void parse_request(struct sip_request *req);
1459 static char *get_header(struct sip_request *req, char *name);
1460 static void copy_request(struct sip_request *dst,struct sip_request *src);
1462 /*! \brief parse_copy: Copy SIP request, parse it */
1463 static void parse_copy(struct sip_request *dst, struct sip_request *src)
1465 memset(dst, 0, sizeof(*dst));
1466 memcpy(dst->data, src->data, sizeof(dst->data));
1467 dst->len = src->len;
1471 /*! \brief send_response: Transmit response on SIP request---*/
1472 static int send_response(struct sip_pvt *p, struct sip_request *req, int reliable, int seqno)
1476 if (sip_debug_test_pvt(p)) {
1477 char iabuf[INET_ADDRSTRLEN];
1478 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE)
1479 ast_verbose("%sTransmitting (NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->recv.sin_addr), ntohs(p->recv.sin_port), req->data);
1481 ast_verbose("%sTransmitting (no NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->sa.sin_addr), ntohs(p->sa.sin_port), req->data);
1483 if (recordhistory) {
1484 struct sip_request tmp;
1485 parse_copy(&tmp, req);
1486 append_history(p, reliable ? "TxRespRel" : "TxResp", "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1489 __sip_reliable_xmit(p, seqno, 1, req->data, req->len, (reliable > 1), req->method) :
1490 __sip_xmit(p, req->data, req->len);
1496 /*! \brief send_request: Send SIP Request to the other part of the dialogue ---*/
1497 static int send_request(struct sip_pvt *p, struct sip_request *req, int reliable, int seqno)
1501 if (sip_debug_test_pvt(p)) {
1502 char iabuf[INET_ADDRSTRLEN];
1503 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE)
1504 ast_verbose("%sTransmitting (NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->recv.sin_addr), ntohs(p->recv.sin_port), req->data);
1506 ast_verbose("%sTransmitting (no NAT) to %s:%d:\n%s\n---\n", reliable ? "Reliably " : "", ast_inet_ntoa(iabuf, sizeof(iabuf), p->sa.sin_addr), ntohs(p->sa.sin_port), req->data);
1508 if (recordhistory) {
1509 struct sip_request tmp;
1510 parse_copy(&tmp, req);
1511 append_history(p, reliable ? "TxReqRel" : "TxReq", "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1514 __sip_reliable_xmit(p, seqno, 0, req->data, req->len, (reliable > 1), req->method) :
1515 __sip_xmit(p, req->data, req->len);
1519 /*! \brief get_in_brackets: Pick out text in brackets from character string ---*/
1520 /* returns pointer to terminated stripped string. modifies input string. */
1521 static char *get_in_brackets(char *tmp)
1525 char *first_bracket;
1526 char *second_bracket;
1531 first_quote = strchr(parse, '"');
1532 first_bracket = strchr(parse, '<');
1533 if (first_quote && first_bracket && (first_quote < first_bracket)) {
1535 for (parse = first_quote + 1; *parse; parse++) {
1536 if ((*parse == '"') && (last_char != '\\'))
1541 ast_log(LOG_WARNING, "No closing quote found in '%s'\n", tmp);
1547 if (first_bracket) {
1548 second_bracket = strchr(first_bracket + 1, '>');
1549 if (second_bracket) {
1550 *second_bracket = '\0';
1551 return first_bracket + 1;
1553 ast_log(LOG_WARNING, "No closing bracket found in '%s'\n", tmp);
1561 /*! \brief sip_sendtext: Send SIP MESSAGE text within a call ---*/
1562 /* Called from PBX core text message functions */
1563 static int sip_sendtext(struct ast_channel *ast, const char *text)
1565 struct sip_pvt *p = ast->tech_pvt;
1566 int debug=sip_debug_test_pvt(p);
1569 ast_verbose("Sending text %s on %s\n", text, ast->name);
1572 if (ast_strlen_zero(text))
1575 ast_verbose("Really sending text %s on %s\n", text, ast->name);
1576 transmit_message_with_text(p, text);
1580 /*! \brief realtime_update_peer: Update peer object in realtime storage ---*/
1581 static void realtime_update_peer(const char *peername, struct sockaddr_in *sin, const char *username, const char *fullcontact, int expirey)
1585 char regseconds[20] = "0";
1587 if (expirey) { /* Registration */
1591 snprintf(regseconds, sizeof(regseconds), "%d", (int)nowtime); /* Expiration time */
1592 ast_inet_ntoa(ipaddr, sizeof(ipaddr), sin->sin_addr);
1593 snprintf(port, sizeof(port), "%d", ntohs(sin->sin_port));
1596 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, "username", username, "fullcontact", fullcontact, NULL);
1598 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, "username", username, NULL);
1601 /*! \brief register_peer_exten: Automatically add peer extension to dial plan ---*/
1602 static void register_peer_exten(struct sip_peer *peer, int onoff)
1605 char *stringp, *ext;
1606 if (!ast_strlen_zero(regcontext)) {
1607 ast_copy_string(multi, ast_strlen_zero(peer->regexten) ? peer->name : peer->regexten, sizeof(multi));
1609 while((ext = strsep(&stringp, "&"))) {
1611 ast_add_extension(regcontext, 1, ext, 1, NULL, NULL, "Noop", ast_strdup(peer->name), free, channeltype);
1613 ast_context_remove_extension(regcontext, ext, 1, NULL);
1618 /*! \brief sip_destroy_peer: Destroy peer object from memory */
1619 static void sip_destroy_peer(struct sip_peer *peer)
1621 /* Delete it, it needs to disappear */
1623 sip_destroy(peer->call);
1624 if (peer->chanvars) {
1625 ast_variables_destroy(peer->chanvars);
1626 peer->chanvars = NULL;
1628 if (peer->expire > -1)
1629 ast_sched_del(sched, peer->expire);
1630 if (peer->pokeexpire > -1)
1631 ast_sched_del(sched, peer->pokeexpire);
1632 register_peer_exten(peer, 0);
1633 ast_free_ha(peer->ha);
1634 if (ast_test_flag(peer, SIP_SELFDESTRUCT))
1636 else if (ast_test_flag(peer, SIP_REALTIME))
1640 clear_realm_authentication(peer->auth);
1641 peer->auth = (struct sip_auth *) NULL;
1643 ast_dnsmgr_release(peer->dnsmgr);
1647 /*! \brief update_peer: Update peer data in database (if used) ---*/
1648 static void update_peer(struct sip_peer *p, int expiry)
1650 int rtcachefriends = ast_test_flag(&(p->flags_page2), SIP_PAGE2_RTCACHEFRIENDS);
1651 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTUPDATE) &&
1652 (ast_test_flag(p, SIP_REALTIME) || rtcachefriends)) {
1653 realtime_update_peer(p->name, &p->addr, p->username, rtcachefriends ? p->fullcontact : NULL, expiry);
1658 /*! \brief realtime_peer: Get peer from realtime storage
1659 * Checks the "sippeers" realtime family from extconfig.conf */
1660 static struct sip_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
1662 struct sip_peer *peer=NULL;
1663 struct ast_variable *var;
1664 struct ast_variable *tmp;
1665 char *newpeername = (char *) peername;
1668 /* First check on peer name */
1670 var = ast_load_realtime("sippeers", "name", peername, NULL);
1671 else if (sin) { /* Then check on IP address */
1672 ast_inet_ntoa(iabuf, sizeof(iabuf), sin->sin_addr);
1673 var = ast_load_realtime("sippeers", "ipaddr", iabuf, NULL);
1680 for (tmp = var; tmp; tmp = tmp->next) {
1681 /* If this is type=user, then skip this object. */
1682 if (!strcasecmp(tmp->name, "type") &&
1683 !strcasecmp(tmp->value, "user")) {
1684 ast_variables_destroy(var);
1686 } else if (!newpeername && !strcasecmp(tmp->name, "name")) {
1687 newpeername = tmp->value;
1691 if (!newpeername) { /* Did not find peer in realtime */
1692 ast_log(LOG_WARNING, "Cannot Determine peer name ip=%s\n", iabuf);
1693 ast_variables_destroy(var);
1694 return (struct sip_peer *) NULL;
1697 /* Peer found in realtime, now build it in memory */
1698 peer = build_peer(newpeername, var, !ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS));
1700 ast_variables_destroy(var);
1701 return (struct sip_peer *) NULL;
1704 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS)) {
1706 ast_copy_flags((&peer->flags_page2),(&global_flags_page2), SIP_PAGE2_RTAUTOCLEAR|SIP_PAGE2_RTCACHEFRIENDS);
1707 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTAUTOCLEAR)) {
1708 if (peer->expire > -1) {
1709 ast_sched_del(sched, peer->expire);
1711 peer->expire = ast_sched_add(sched, (global_rtautoclear) * 1000, expire_register, (void *)peer);
1713 ASTOBJ_CONTAINER_LINK(&peerl,peer);
1715 ast_set_flag(peer, SIP_REALTIME);
1717 ast_variables_destroy(var);
1722 /*! \brief sip_addrcmp: Support routine for find_peer ---*/
1723 static int sip_addrcmp(char *name, struct sockaddr_in *sin)
1725 /* We know name is the first field, so we can cast */
1726 struct sip_peer *p = (struct sip_peer *)name;
1727 return !(!inaddrcmp(&p->addr, sin) ||
1728 (ast_test_flag(p, SIP_INSECURE_PORT) &&
1729 (p->addr.sin_addr.s_addr == sin->sin_addr.s_addr)));
1732 /*! \brief find_peer: Locate peer by name or ip address
1733 * This is used on incoming SIP message to find matching peer on ip
1734 or outgoing message to find matching peer on name */
1735 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
1737 struct sip_peer *p = NULL;
1740 p = ASTOBJ_CONTAINER_FIND(&peerl,peer);
1742 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl,sin,name,sip_addr_hashfunc,1,sip_addrcmp);
1744 if (!p && realtime) {
1745 p = realtime_peer(peer, sin);
1750 /*! \brief sip_destroy_user: Remove user object from in-memory storage ---*/
1751 static void sip_destroy_user(struct sip_user *user)
1753 ast_free_ha(user->ha);
1754 if (user->chanvars) {
1755 ast_variables_destroy(user->chanvars);
1756 user->chanvars = NULL;
1758 if (ast_test_flag(user, SIP_REALTIME))
1765 /*! \brief realtime_user: Load user from realtime storage
1766 * Loads user from "sipusers" category in realtime (extconfig.conf)
1767 * Users are matched on From: user name (the domain in skipped) */
1768 static struct sip_user *realtime_user(const char *username)
1770 struct ast_variable *var;
1771 struct ast_variable *tmp;
1772 struct sip_user *user = NULL;
1774 var = ast_load_realtime("sipusers", "name", username, NULL);
1779 for (tmp = var; tmp; tmp = tmp->next) {
1780 if (!strcasecmp(tmp->name, "type") &&
1781 !strcasecmp(tmp->value, "peer")) {
1782 ast_variables_destroy(var);
1787 user = build_user(username, var, !ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS));
1789 if (!user) { /* No user found */
1790 ast_variables_destroy(var);
1794 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS)) {
1795 ast_set_flag((&user->flags_page2), SIP_PAGE2_RTCACHEFRIENDS);
1797 ASTOBJ_CONTAINER_LINK(&userl,user);
1799 /* Move counter from s to r... */
1802 ast_set_flag(user, SIP_REALTIME);
1804 ast_variables_destroy(var);
1808 /*! \brief find_user: Locate user by name
1809 * Locates user by name (From: sip uri user name part) first
1810 * from in-memory list (static configuration) then from
1811 * realtime storage (defined in extconfig.conf) */
1812 static struct sip_user *find_user(const char *name, int realtime)
1814 struct sip_user *u = NULL;
1815 u = ASTOBJ_CONTAINER_FIND(&userl,name);
1816 if (!u && realtime) {
1817 u = realtime_user(name);
1822 /*! \brief create_addr_from_peer: create address structure from peer reference ---*/
1823 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer)
1825 if ((peer->addr.sin_addr.s_addr || peer->defaddr.sin_addr.s_addr) &&
1826 (!peer->maxms || ((peer->lastms >= 0) && (peer->lastms <= peer->maxms)))) {
1827 if (peer->addr.sin_addr.s_addr) {
1828 r->sa.sin_family = peer->addr.sin_family;
1829 r->sa.sin_addr = peer->addr.sin_addr;
1830 r->sa.sin_port = peer->addr.sin_port;
1832 r->sa.sin_family = peer->defaddr.sin_family;
1833 r->sa.sin_addr = peer->defaddr.sin_addr;
1834 r->sa.sin_port = peer->defaddr.sin_port;
1836 memcpy(&r->recv, &r->sa, sizeof(r->recv));
1841 ast_copy_flags(r, peer, SIP_FLAGS_TO_COPY);
1842 r->capability = peer->capability;
1843 r->prefs = peer->prefs;
1845 ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1846 ast_rtp_setnat(r->rtp, (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1849 ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1850 ast_rtp_setnat(r->vrtp, (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1852 ast_string_field_set(r, peername, peer->username);
1853 ast_string_field_set(r, authname, peer->username);
1854 ast_string_field_set(r, username, peer->username);
1855 ast_string_field_set(r, peersecret, peer->secret);
1856 ast_string_field_set(r, peermd5secret, peer->md5secret);
1857 ast_string_field_set(r, tohost, peer->tohost);
1858 ast_string_field_set(r, fullcontact, peer->fullcontact);
1859 if (!r->initreq.headers && !ast_strlen_zero(peer->fromdomain)) {
1862 tmpcall = ast_strdupa(r->callid);
1864 c = strchr(tmpcall, '@');
1867 ast_string_field_build(r, callid, "%s@%s", tmpcall, peer->fromdomain);
1871 if (ast_strlen_zero(r->tohost)) {
1872 char iabuf[INET_ADDRSTRLEN];
1874 if (peer->addr.sin_addr.s_addr)
1875 ast_inet_ntoa(iabuf, sizeof(iabuf), peer->addr.sin_addr);
1877 ast_inet_ntoa(iabuf, sizeof(iabuf), peer->defaddr.sin_addr);
1878 ast_string_field_set(r, tohost, iabuf);
1880 if (!ast_strlen_zero(peer->fromdomain))
1881 ast_string_field_set(r, fromdomain, peer->fromdomain);
1882 if (!ast_strlen_zero(peer->fromuser))
1883 ast_string_field_set(r, fromuser, peer->fromuser);
1884 r->maxtime = peer->maxms;
1885 r->callgroup = peer->callgroup;
1886 r->pickupgroup = peer->pickupgroup;
1887 /* Set timer T1 to RTT for this peer (if known by qualify=) */
1888 if (peer->maxms && peer->lastms)
1889 r->timer_t1 = peer->lastms;
1890 if ((ast_test_flag(r, SIP_DTMF) == SIP_DTMF_RFC2833) || (ast_test_flag(r, SIP_DTMF) == SIP_DTMF_AUTO))
1891 r->noncodeccapability |= AST_RTP_DTMF;
1893 r->noncodeccapability &= ~AST_RTP_DTMF;
1894 ast_string_field_set(r, context, peer->context);
1895 r->rtptimeout = peer->rtptimeout;
1896 r->rtpholdtimeout = peer->rtpholdtimeout;
1897 r->rtpkeepalive = peer->rtpkeepalive;
1898 if (peer->call_limit)
1899 ast_set_flag(r, SIP_CALL_LIMIT);
1904 /*! \brief create_addr: create address structure from peer name
1905 * Or, if peer not found, find it in the global DNS
1906 * returns TRUE (-1) on failure, FALSE on success */
1907 static int create_addr(struct sip_pvt *dialog, const char *opeer)
1910 struct ast_hostent ahp;
1915 char host[MAXHOSTNAMELEN], *hostn;
1918 ast_copy_string(peer, opeer, sizeof(peer));
1919 port = strchr(peer, ':');
1924 dialog->sa.sin_family = AF_INET;
1925 dialog->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
1926 p = find_peer(peer, NULL, 1);
1930 if (create_addr_from_peer(dialog, p))
1931 ASTOBJ_UNREF(p, sip_destroy_peer);
1939 portno = atoi(port);
1941 portno = DEFAULT_SIP_PORT;
1943 char service[MAXHOSTNAMELEN];
1946 snprintf(service, sizeof(service), "_sip._udp.%s", peer);
1947 ret = ast_get_srv(NULL, host, sizeof(host), &tportno, service);
1953 hp = ast_gethostbyname(hostn, &ahp);
1955 ast_string_field_set(dialog, tohost, peer);
1956 memcpy(&dialog->sa.sin_addr, hp->h_addr, sizeof(dialog->sa.sin_addr));
1957 dialog->sa.sin_port = htons(portno);
1958 memcpy(&dialog->recv, &dialog->sa, sizeof(dialog->recv));
1961 ast_log(LOG_WARNING, "No such host: %s\n", peer);
1965 ASTOBJ_UNREF(p, sip_destroy_peer);
1970 /*! \brief auto_congest: Scheduled congestion on a call ---*/
1971 static int auto_congest(void *nothing)
1973 struct sip_pvt *p = nothing;
1974 ast_mutex_lock(&p->lock);
1977 if (!ast_mutex_trylock(&p->owner->lock)) {
1978 ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
1979 ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
1980 ast_mutex_unlock(&p->owner->lock);
1983 ast_mutex_unlock(&p->lock);
1990 /*! \brief sip_call: Initiate SIP call from PBX
1991 * used from the dial() application */
1992 static int sip_call(struct ast_channel *ast, char *dest, int timeout)
1997 char *osphandle = NULL;
1999 struct varshead *headp;
2000 struct ast_var_t *current;
2005 if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
2006 ast_log(LOG_WARNING, "sip_call called on %s, neither down nor reserved\n", ast->name);
2011 /* Check whether there is vxml_url, distinctive ring variables */
2013 headp=&ast->varshead;
2014 AST_LIST_TRAVERSE(headp,current,entries) {
2015 /* Check whether there is a VXML_URL variable */
2016 if (!p->options->vxml_url && !strcasecmp(ast_var_name(current), "VXML_URL")) {
2017 p->options->vxml_url = ast_var_value(current);
2018 } else if (!p->options->uri_options && !strcasecmp(ast_var_name(current), "SIP_URI_OPTIONS")) {
2019 p->options->uri_options = ast_var_value(current);
2020 } else if (!p->options->distinctive_ring && !strcasecmp(ast_var_name(current), "ALERT_INFO")) {
2021 /* Check whether there is a ALERT_INFO variable */
2022 p->options->distinctive_ring = ast_var_value(current);
2023 } else if (!p->options->addsipheaders && !strncasecmp(ast_var_name(current), "SIPADDHEADER", strlen("SIPADDHEADER"))) {
2024 /* Check whether there is a variable with a name starting with SIPADDHEADER */
2025 p->options->addsipheaders = 1;
2030 else if (!p->options->osptoken && !strcasecmp(ast_var_name(current), "OSPTOKEN")) {
2031 p->options->osptoken = ast_var_value(current);
2032 } else if (!osphandle && !strcasecmp(ast_var_name(current), "OSPHANDLE")) {
2033 osphandle = ast_var_value(current);
2039 ast_set_flag(p, SIP_OUTGOING);
2041 if (!p->options->osptoken || !osphandle || (sscanf(osphandle, "%d", &p->osphandle) != 1)) {
2042 /* Force Disable OSP support */
2043 ast_log(LOG_DEBUG, "Disabling OSP support for this call. osptoken = %s, osphandle = %s\n", p->options->osptoken, osphandle);
2044 p->options->osptoken = NULL;
2049 ast_log(LOG_DEBUG, "Outgoing Call for %s\n", p->username);
2050 res = update_call_counter(p, INC_CALL_LIMIT);
2052 p->callingpres = ast->cid.cid_pres;
2053 p->jointcapability = p->capability;
2054 transmit_invite(p, SIP_INVITE, 1, 2);
2056 /* Initialize auto-congest time */
2057 p->initid = ast_sched_add(sched, p->maxtime * 4, auto_congest, p);
2063 /*! \brief sip_registry_destroy: Destroy registry object ---*/
2064 /* Objects created with the register= statement in static configuration */
2065 static void sip_registry_destroy(struct sip_registry *reg)
2069 /* Clear registry before destroying to ensure
2070 we don't get reentered trying to grab the registry lock */
2071 reg->call->registry = NULL;
2072 sip_destroy(reg->call);
2074 if (reg->expire > -1)
2075 ast_sched_del(sched, reg->expire);
2076 if (reg->timeout > -1)
2077 ast_sched_del(sched, reg->timeout);
2078 ast_string_field_free_all(reg);
2084 /*! \brief __sip_destroy: Execute destrucion of call structure, release memory---*/
2085 static void __sip_destroy(struct sip_pvt *p, int lockowner)
2087 struct sip_pvt *cur, *prev = NULL;
2090 if (sip_debug_test_pvt(p))
2091 ast_verbose("Destroying call '%s'\n", p->callid);
2094 sip_dump_history(p);
2099 if (p->stateid > -1)
2100 ast_extension_state_del(p->stateid, NULL);
2102 ast_sched_del(sched, p->initid);
2103 if (p->autokillid > -1)
2104 ast_sched_del(sched, p->autokillid);
2107 ast_rtp_destroy(p->rtp);
2110 ast_rtp_destroy(p->vrtp);
2113 free_old_route(p->route);
2117 if (p->registry->call == p)
2118 p->registry->call = NULL;
2119 ASTOBJ_UNREF(p->registry,sip_registry_destroy);
2122 /* Unlink us from the owner if we have one */
2125 ast_mutex_lock(&p->owner->lock);
2126 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
2127 p->owner->tech_pvt = NULL;
2129 ast_mutex_unlock(&p->owner->lock);
2133 while(!AST_LIST_EMPTY(p->history)) {
2134 struct sip_history *hist = AST_LIST_FIRST(p->history);
2135 AST_LIST_REMOVE_HEAD(p->history, list);
2146 prev->next = cur->next;
2155 ast_log(LOG_WARNING, "Trying to destroy \"%s\", not found in dialog list?!?! \n", p->callid);
2159 ast_sched_del(sched, p->initid);
2161 while((cp = p->packets)) {
2162 p->packets = p->packets->next;
2163 if (cp->retransid > -1) {
2164 ast_sched_del(sched, cp->retransid);
2169 ast_variables_destroy(p->chanvars);
2172 ast_mutex_destroy(&p->lock);
2174 ast_string_field_free_all(p);
2179 /*! \brief update_call_counter: Handle call_limit for SIP users
2180 * Setting a call-limit will cause calls above the limit not to be accepted.
2182 * Remember that for a type=friend, there's one limit for the user and
2183 * another for the peer, not a combined call limit.
2184 * This will cause unexpected behaviour in subscriptions, since a "friend"
2185 * is *two* devices in Asterisk, not one.
2187 * Thought: For realtime, we should propably update storage with inuse counter...
2189 static int update_call_counter(struct sip_pvt *fup, int event)
2192 int *inuse, *call_limit;
2193 int outgoing = ast_test_flag(fup, SIP_OUTGOING);
2194 struct sip_user *u = NULL;
2195 struct sip_peer *p = NULL;
2197 if (option_debug > 2)
2198 ast_log(LOG_DEBUG, "Updating call counter for %s call\n", outgoing ? "outgoing" : "incoming");
2199 /* Test if we need to check call limits, in order to avoid
2200 realtime lookups if we do not need it */
2201 if (!ast_test_flag(fup, SIP_CALL_LIMIT))
2204 ast_copy_string(name, fup->username, sizeof(name));
2206 /* Check the list of users */
2207 if (!outgoing) /* Only check users for incoming calls */
2208 u = find_user(name, 1);
2212 call_limit = &u->call_limit;
2215 /* Try to find peer */
2217 p = find_peer(fup->peername, NULL, 1);
2220 call_limit = &p->call_limit;
2221 ast_copy_string(name, fup->peername, sizeof(name));
2223 if (option_debug > 1)
2224 ast_log(LOG_DEBUG, "%s is not a local user, no call limit\n", name);
2229 /* incoming and outgoing affects the inUse counter */
2230 case DEC_CALL_LIMIT:
2236 if (option_debug > 1 || sipdebug) {
2237 ast_log(LOG_DEBUG, "Call %s %s '%s' removed from call limit %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *call_limit);
2240 case INC_CALL_LIMIT:
2241 if (*call_limit > 0 ) {
2242 if (*inuse >= *call_limit) {
2243 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);
2245 ASTOBJ_UNREF(u,sip_destroy_user);
2247 ASTOBJ_UNREF(p,sip_destroy_peer);
2252 if (option_debug > 1 || sipdebug) {
2253 ast_log(LOG_DEBUG, "Call %s %s '%s' is %d out of %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *inuse, *call_limit);
2257 ast_log(LOG_ERROR, "update_call_counter(%s, %d) called with no event!\n", name, event);
2260 ASTOBJ_UNREF(u,sip_destroy_user);
2262 ASTOBJ_UNREF(p,sip_destroy_peer);
2266 /*! \brief sip_destroy: Destroy SIP call structure ---*/
2267 static void sip_destroy(struct sip_pvt *p)
2269 ast_mutex_lock(&iflock);
2270 __sip_destroy(p, 1);
2271 ast_mutex_unlock(&iflock);
2275 static int transmit_response_reliable(struct sip_pvt *p, char *msg, struct sip_request *req, int fatal);
2277 /*! \brief hangup_sip2cause: Convert SIP hangup causes to Asterisk hangup causes ---*/
2278 static int hangup_sip2cause(int cause)
2280 /* Possible values taken from causes.h */
2283 case 401: /* Unauthorized */
2284 return AST_CAUSE_CALL_REJECTED;
2285 case 403: /* Not found */
2286 return AST_CAUSE_CALL_REJECTED;
2287 case 404: /* Not found */
2288 return AST_CAUSE_UNALLOCATED;
2289 case 405: /* Method not allowed */
2290 return AST_CAUSE_INTERWORKING;
2291 case 407: /* Proxy authentication required */
2292 return AST_CAUSE_CALL_REJECTED;
2293 case 408: /* No reaction */
2294 return AST_CAUSE_NO_USER_RESPONSE;
2295 case 409: /* Conflict */
2296 return AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
2297 case 410: /* Gone */
2298 return AST_CAUSE_UNALLOCATED;
2299 case 411: /* Length required */
2300 return AST_CAUSE_INTERWORKING;
2301 case 413: /* Request entity too large */
2302 return AST_CAUSE_INTERWORKING;
2303 case 414: /* Request URI too large */
2304 return AST_CAUSE_INTERWORKING;
2305 case 415: /* Unsupported media type */
2306 return AST_CAUSE_INTERWORKING;
2307 case 420: /* Bad extension */
2308 return AST_CAUSE_NO_ROUTE_DESTINATION;
2309 case 480: /* No answer */
2310 return AST_CAUSE_FAILURE;
2311 case 481: /* No answer */
2312 return AST_CAUSE_INTERWORKING;
2313 case 482: /* Loop detected */
2314 return AST_CAUSE_INTERWORKING;
2315 case 483: /* Too many hops */
2316 return AST_CAUSE_NO_ANSWER;
2317 case 484: /* Address incomplete */
2318 return AST_CAUSE_INVALID_NUMBER_FORMAT;
2319 case 485: /* Ambigous */
2320 return AST_CAUSE_UNALLOCATED;
2321 case 486: /* Busy everywhere */
2322 return AST_CAUSE_BUSY;
2323 case 487: /* Request terminated */
2324 return AST_CAUSE_INTERWORKING;
2325 case 488: /* No codecs approved */
2326 return AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
2327 case 491: /* Request pending */
2328 return AST_CAUSE_INTERWORKING;
2329 case 493: /* Undecipherable */
2330 return AST_CAUSE_INTERWORKING;
2331 case 500: /* Server internal failure */
2332 return AST_CAUSE_FAILURE;
2333 case 501: /* Call rejected */
2334 return AST_CAUSE_FACILITY_REJECTED;
2336 return AST_CAUSE_DESTINATION_OUT_OF_ORDER;
2337 case 503: /* Service unavailable */
2338 return AST_CAUSE_CONGESTION;
2339 case 504: /* Gateway timeout */
2340 return AST_CAUSE_RECOVERY_ON_TIMER_EXPIRE;
2341 case 505: /* SIP version not supported */
2342 return AST_CAUSE_INTERWORKING;
2343 case 600: /* Busy everywhere */
2344 return AST_CAUSE_USER_BUSY;
2345 case 603: /* Decline */
2346 return AST_CAUSE_CALL_REJECTED;
2347 case 604: /* Does not exist anywhere */
2348 return AST_CAUSE_UNALLOCATED;
2349 case 606: /* Not acceptable */
2350 return AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
2352 return AST_CAUSE_NORMAL;
2359 /*! \brief hangup_cause2sip: Convert Asterisk hangup causes to SIP codes
2361 Possible values from causes.h
2362 AST_CAUSE_NOTDEFINED AST_CAUSE_NORMAL AST_CAUSE_BUSY
2363 AST_CAUSE_FAILURE AST_CAUSE_CONGESTION AST_CAUSE_UNALLOCATED
2365 In addition to these, a lot of PRI codes is defined in causes.h
2366 ...should we take care of them too ?
2370 ISUP Cause value SIP response
2371 ---------------- ------------
2372 1 unallocated number 404 Not Found
2373 2 no route to network 404 Not found
2374 3 no route to destination 404 Not found
2375 16 normal call clearing --- (*)
2376 17 user busy 486 Busy here
2377 18 no user responding 408 Request Timeout
2378 19 no answer from the user 480 Temporarily unavailable
2379 20 subscriber absent 480 Temporarily unavailable
2380 21 call rejected 403 Forbidden (+)
2381 22 number changed (w/o diagnostic) 410 Gone
2382 22 number changed (w/ diagnostic) 301 Moved Permanently
2383 23 redirection to new destination 410 Gone
2384 26 non-selected user clearing 404 Not Found (=)
2385 27 destination out of order 502 Bad Gateway
2386 28 address incomplete 484 Address incomplete
2387 29 facility rejected 501 Not implemented
2388 31 normal unspecified 480 Temporarily unavailable
2391 static char *hangup_cause2sip(int cause)
2395 case AST_CAUSE_UNALLOCATED: /* 1 */
2396 case AST_CAUSE_NO_ROUTE_DESTINATION: /* 3 IAX2: Can't find extension in context */
2397 case AST_CAUSE_NO_ROUTE_TRANSIT_NET: /* 2 */
2398 return "404 Not Found";
2399 case AST_CAUSE_CONGESTION: /* 34 */
2400 case AST_CAUSE_SWITCH_CONGESTION: /* 42 */
2401 return "503 Service Unavailable";
2402 case AST_CAUSE_NO_USER_RESPONSE: /* 18 */
2403 return "408 Request Timeout";
2404 case AST_CAUSE_NO_ANSWER: /* 19 */
2405 return "480 Temporarily unavailable";
2406 case AST_CAUSE_CALL_REJECTED: /* 21 */
2407 return "403 Forbidden";
2408 case AST_CAUSE_NUMBER_CHANGED: /* 22 */
2410 case AST_CAUSE_NORMAL_UNSPECIFIED: /* 31 */
2411 return "480 Temporarily unavailable";
2412 case AST_CAUSE_INVALID_NUMBER_FORMAT:
2413 return "484 Address incomplete";
2414 case AST_CAUSE_USER_BUSY:
2415 return "486 Busy here";
2416 case AST_CAUSE_FAILURE:
2417 return "500 Server internal failure";
2418 case AST_CAUSE_FACILITY_REJECTED: /* 29 */
2419 return "501 Not Implemented";
2420 case AST_CAUSE_CHAN_NOT_IMPLEMENTED:
2421 return "503 Service Unavailable";
2422 /* Used in chan_iax2 */
2423 case AST_CAUSE_DESTINATION_OUT_OF_ORDER:
2424 return "502 Bad Gateway";
2425 case AST_CAUSE_BEARERCAPABILITY_NOTAVAIL: /* Can't find codec to connect to host */
2426 return "488 Not Acceptable Here";
2428 case AST_CAUSE_NOTDEFINED:
2430 ast_log(LOG_DEBUG, "AST hangup cause %d (no match found in SIP)\n", cause);
2439 /*! \brief sip_hangup: Hangup SIP call
2440 * Part of PBX interface, called from ast_hangup */
2441 static int sip_hangup(struct ast_channel *ast)
2443 struct sip_pvt *p = ast->tech_pvt;
2445 struct ast_flags locflags = {0};
2448 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
2452 ast_log(LOG_DEBUG, "Hangup call %s, SIP callid %s)\n", ast->name, p->callid);
2454 ast_mutex_lock(&p->lock);
2456 if ((p->osphandle > -1) && (ast->_state == AST_STATE_UP)) {
2457 ast_osp_terminate(p->osphandle, AST_CAUSE_NORMAL, p->ospstart, time(NULL) - p->ospstart);
2460 ast_log(LOG_DEBUG, "update_call_counter(%s) - decrement call limit counter\n", p->username);
2461 update_call_counter(p, DEC_CALL_LIMIT);
2462 /* Determine how to disconnect */
2463 if (p->owner != ast) {
2464 ast_log(LOG_WARNING, "Huh? We aren't the owner? Can't hangup call.\n");
2465 ast_mutex_unlock(&p->lock);
2468 /* If the call is not UP, we need to send CANCEL instead of BYE */
2469 if (ast->_state != AST_STATE_UP)
2475 ast_dsp_free(p->vad);
2478 ast->tech_pvt = NULL;
2480 ast_mutex_lock(&usecnt_lock);
2482 ast_mutex_unlock(&usecnt_lock);
2483 ast_update_use_count();
2485 ast_set_flag(&locflags, SIP_NEEDDESTROY);
2487 /* Start the process if it's not already started */
2488 if (!ast_test_flag(p, SIP_ALREADYGONE) && !ast_strlen_zero(p->initreq.data)) {
2489 if (needcancel) { /* Outgoing call, not up */
2490 if (ast_test_flag(p, SIP_OUTGOING)) {
2491 transmit_request_with_auth(p, SIP_CANCEL, p->ocseq, 1, 0);
2492 /* Actually don't destroy us yet, wait for the 487 on our original
2493 INVITE, but do set an autodestruct just in case we never get it. */
2494 ast_clear_flag(&locflags, SIP_NEEDDESTROY);
2495 sip_scheddestroy(p, 15000);
2496 /* stop retransmitting an INVITE that has not received a response */
2497 __sip_pretend_ack(p);
2498 if ( p->initid != -1 ) {
2499 /* channel still up - reverse dec of inUse counter
2500 only if the channel is not auto-congested */
2501 update_call_counter(p, INC_CALL_LIMIT);
2503 } else { /* Incoming call, not up */
2505 if (ast->hangupcause && ((res = hangup_cause2sip(ast->hangupcause)))) {
2506 transmit_response_reliable(p, res, &p->initreq, 1);
2508 transmit_response_reliable(p, "603 Declined", &p->initreq, 1);
2510 } else { /* Call is in UP state, send BYE */
2511 if (!p->pendinginvite) {
2513 transmit_request_with_auth(p, SIP_BYE, 0, 1, 1);
2515 /* Note we will need a BYE when this all settles out
2516 but we can't send one while we have "INVITE" outstanding. */
2517 ast_set_flag(p, SIP_PENDINGBYE);
2518 ast_clear_flag(p, SIP_NEEDREINVITE);
2522 ast_copy_flags(p, (&locflags), SIP_NEEDDESTROY);
2523 ast_mutex_unlock(&p->lock);
2527 /*! \brief sip_answer: Answer SIP call , send 200 OK on Invite
2528 * Part of PBX interface */
2529 static int sip_answer(struct ast_channel *ast)
2533 struct sip_pvt *p = ast->tech_pvt;
2535 ast_mutex_lock(&p->lock);
2536 if (ast->_state != AST_STATE_UP) {
2541 codec=pbx_builtin_getvar_helper(p->owner,"SIP_CODEC");
2543 fmt=ast_getformatbyname(codec);
2545 ast_log(LOG_NOTICE, "Changing codec to '%s' for this call because of ${SIP_CODEC) variable\n",codec);
2546 if (p->jointcapability & fmt) {
2547 p->jointcapability &= fmt;
2548 p->capability &= fmt;
2550 ast_log(LOG_NOTICE, "Ignoring ${SIP_CODEC} variable because it is not shared by both ends.\n");
2551 } else ast_log(LOG_NOTICE, "Ignoring ${SIP_CODEC} variable because of unrecognized/not configured codec (check allow/disallow in sip.conf): %s\n",codec);
2554 ast_setstate(ast, AST_STATE_UP);
2556 ast_log(LOG_DEBUG, "sip_answer(%s)\n", ast->name);
2557 res = transmit_response_with_sdp(p, "200 OK", &p->initreq, 1);
2559 ast_mutex_unlock(&p->lock);
2563 /*! \brief sip_write: Send frame to media channel (rtp) ---*/
2564 static int sip_write(struct ast_channel *ast, struct ast_frame *frame)
2566 struct sip_pvt *p = ast->tech_pvt;
2568 switch (frame->frametype) {
2569 case AST_FRAME_VOICE:
2570 if (!(frame->subclass & ast->nativeformats)) {
2571 ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
2572 frame->subclass, ast->nativeformats, ast->readformat, ast->writeformat);
2576 ast_mutex_lock(&p->lock);
2578 /* If channel is not up, activate early media session */
2579 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2580 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, 0);
2581 ast_set_flag(p, SIP_PROGRESS_SENT);
2583 time(&p->lastrtptx);
2584 res = ast_rtp_write(p->rtp, frame);
2586 ast_mutex_unlock(&p->lock);
2589 case AST_FRAME_VIDEO:
2591 ast_mutex_lock(&p->lock);
2593 /* Activate video early media */
2594 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2595 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, 0);
2596 ast_set_flag(p, SIP_PROGRESS_SENT);
2598 time(&p->lastrtptx);
2599 res = ast_rtp_write(p->vrtp, frame);
2601 ast_mutex_unlock(&p->lock);
2604 case AST_FRAME_IMAGE:
2608 ast_log(LOG_WARNING, "Can't send %d type frames with SIP write\n", frame->frametype);
2615 /*! \brief sip_fixup: Fix up a channel: If a channel is consumed, this is called.
2616 Basically update any ->owner links ----*/
2617 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
2619 struct sip_pvt *p = newchan->tech_pvt;
2620 ast_mutex_lock(&p->lock);
2621 if (p->owner != oldchan) {
2622 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
2623 ast_mutex_unlock(&p->lock);
2627 ast_mutex_unlock(&p->lock);
2631 /*! \brief sip_senddigit: Send DTMF character on SIP channel */
2632 /* within one call, we're able to transmit in many methods simultaneously */
2633 static int sip_senddigit(struct ast_channel *ast, char digit)
2635 struct sip_pvt *p = ast->tech_pvt;
2637 ast_mutex_lock(&p->lock);
2638 switch (ast_test_flag(p, SIP_DTMF)) {
2640 transmit_info_with_digit(p, digit);
2642 case SIP_DTMF_RFC2833:
2644 ast_rtp_senddigit(p->rtp, digit);
2646 case SIP_DTMF_INBAND:
2650 ast_mutex_unlock(&p->lock);
2656 /*! \brief sip_transfer: Transfer SIP call */
2657 static int sip_transfer(struct ast_channel *ast, const char *dest)
2659 struct sip_pvt *p = ast->tech_pvt;
2662 ast_mutex_lock(&p->lock);
2663 if (ast->_state == AST_STATE_RING)
2664 res = sip_sipredirect(p, dest);
2666 res = transmit_refer(p, dest);
2667 ast_mutex_unlock(&p->lock);
2671 /*! \brief sip_indicate: Play indication to user
2672 * With SIP a lot of indications is sent as messages, letting the device play
2673 the indication - busy signal, congestion etc */
2674 static int sip_indicate(struct ast_channel *ast, int condition)
2676 struct sip_pvt *p = ast->tech_pvt;
2679 ast_mutex_lock(&p->lock);
2681 case AST_CONTROL_RINGING:
2682 if (ast->_state == AST_STATE_RING) {
2683 if (!ast_test_flag(p, SIP_PROGRESS_SENT) ||
2684 (ast_test_flag(p, SIP_PROG_INBAND) == SIP_PROG_INBAND_NEVER)) {
2685 /* Send 180 ringing if out-of-band seems reasonable */
2686 transmit_response(p, "180 Ringing", &p->initreq);
2687 ast_set_flag(p, SIP_RINGING);
2688 if (ast_test_flag(p, SIP_PROG_INBAND) != SIP_PROG_INBAND_YES)
2691 /* Well, if it's not reasonable, just send in-band */
2696 case AST_CONTROL_BUSY:
2697 if (ast->_state != AST_STATE_UP) {
2698 transmit_response(p, "486 Busy Here", &p->initreq);
2699 ast_set_flag(p, SIP_ALREADYGONE);
2700 ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
2705 case AST_CONTROL_CONGESTION:
2706 if (ast->_state != AST_STATE_UP) {
2707 transmit_response(p, "503 Service Unavailable", &p->initreq);
2708 ast_set_flag(p, SIP_ALREADYGONE);
2709 ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
2714 case AST_CONTROL_PROCEEDING:
2715 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2716 transmit_response(p, "100 Trying", &p->initreq);
2721 case AST_CONTROL_PROGRESS:
2722 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2723 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, 0);
2724 ast_set_flag(p, SIP_PROGRESS_SENT);
2729 case AST_CONTROL_HOLD: /* The other part of the bridge are put on hold */
2731 ast_log(LOG_DEBUG, "Bridged channel now on hold%s\n", p->callid);
2734 case AST_CONTROL_UNHOLD: /* The other part of the bridge are back from hold */
2736 ast_log(LOG_DEBUG, "Bridged channel is back from hold, let's talk! : %s\n", p->callid);
2739 case AST_CONTROL_VIDUPDATE: /* Request a video frame update */
2740 if (p->vrtp && !ast_test_flag(p, SIP_NOVIDEO)) {
2741 transmit_info_with_vidupdate(p);
2750 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
2754 ast_mutex_unlock(&p->lock);
2760 /*! \brief sip_new: Initiate a call in the SIP channel */
2761 /* called from sip_request_call (calls from the pbx ) */
2762 static struct ast_channel *sip_new(struct sip_pvt *i, int state, const char *title)
2764 struct ast_channel *tmp;
2765 struct ast_variable *v = NULL;
2769 char iabuf[INET_ADDRSTRLEN];
2770 char peer[MAXHOSTNAMELEN];
2773 ast_mutex_unlock(&i->lock);
2774 /* Don't hold a sip pvt lock while we allocate a channel */
2775 tmp = ast_channel_alloc(1);
2776 ast_mutex_lock(&i->lock);
2778 ast_log(LOG_WARNING, "Unable to allocate SIP channel structure\n");
2781 tmp->tech = &sip_tech;
2782 /* Select our native format based on codec preference until we receive
2783 something from another device to the contrary. */
2784 if (i->jointcapability)
2785 what = i->jointcapability;
2786 else if (i->capability)
2787 what = i->capability;
2789 what = global_capability;
2790 tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
2791 fmt = ast_best_codec(tmp->nativeformats);
2794 snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%04x", title, thread_safe_rand() & 0xffff);
2795 else if (strchr(i->fromdomain,':'))
2796 snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%08x", strchr(i->fromdomain,':')+1, (int)(long)(i));
2798 snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%08x", i->fromdomain, (int)(long)(i));
2800 tmp->type = channeltype;
2801 if (ast_test_flag(i, SIP_DTMF) == SIP_DTMF_INBAND) {
2802 i->vad = ast_dsp_new();
2803 ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
2805 ast_dsp_digitmode(i->vad, DSP_DIGITMODE_DTMF | DSP_DIGITMODE_RELAXDTMF);
2808 tmp->fds[0] = ast_rtp_fd(i->rtp);
2809 tmp->fds[1] = ast_rtcp_fd(i->rtp);
2812 tmp->fds[2] = ast_rtp_fd(i->vrtp);
2813 tmp->fds[3] = ast_rtcp_fd(i->vrtp);
2815 if (state == AST_STATE_RING)
2817 tmp->adsicpe = AST_ADSI_UNAVAILABLE;
2818 tmp->writeformat = fmt;
2819 tmp->rawwriteformat = fmt;
2820 tmp->readformat = fmt;
2821 tmp->rawreadformat = fmt;
2824 tmp->callgroup = i->callgroup;
2825 tmp->pickupgroup = i->pickupgroup;
2826 tmp->cid.cid_pres = i->callingpres;
2827 if (!ast_strlen_zero(i->accountcode))
2828 ast_copy_string(tmp->accountcode, i->accountcode, sizeof(tmp->accountcode));
2830 tmp->amaflags = i->amaflags;
2831 if (!ast_strlen_zero(i->language))
2832 ast_copy_string(tmp->language, i->language, sizeof(tmp->language));
2833 if (!ast_strlen_zero(i->musicclass))
2834 ast_copy_string(tmp->musicclass, i->musicclass, sizeof(tmp->musicclass));
2836 ast_mutex_lock(&usecnt_lock);
2838 ast_mutex_unlock(&usecnt_lock);
2839 ast_copy_string(tmp->context, i->context, sizeof(tmp->context));
2840 ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
2841 if (!ast_strlen_zero(i->cid_num))
2842 tmp->cid.cid_num = ast_strdup(i->cid_num);
2843 if (!ast_strlen_zero(i->cid_name))
2844 tmp->cid.cid_name = ast_strdup(i->cid_name);
2845 if (!ast_strlen_zero(i->rdnis))
2846 tmp->cid.cid_rdnis = ast_strdup(i->rdnis);
2847 if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
2848 tmp->cid.cid_dnid = ast_strdup(i->exten);
2850 if (!ast_strlen_zero(i->uri)) {
2851 pbx_builtin_setvar_helper(tmp, "SIPURI", i->uri);
2853 if (!ast_strlen_zero(i->domain)) {
2854 pbx_builtin_setvar_helper(tmp, "SIPDOMAIN", i->domain);
2856 if (!ast_strlen_zero(i->useragent)) {
2857 pbx_builtin_setvar_helper(tmp, "SIPUSERAGENT", i->useragent);
2859 if (!ast_strlen_zero(i->callid)) {
2860 pbx_builtin_setvar_helper(tmp, "SIPCALLID", i->callid);
2863 snprintf(peer, sizeof(peer), "[%s]:%d", ast_inet_ntoa(iabuf, sizeof(iabuf), i->sa.sin_addr), ntohs(i->sa.sin_port));
2864 pbx_builtin_setvar_helper(tmp, "OSPPEER", peer);
2866 ast_setstate(tmp, state);
2867 if (state != AST_STATE_DOWN) {
2868 if (ast_pbx_start(tmp)) {
2869 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
2874 /* Set channel variables for this call from configuration */
2875 for (v = i->chanvars ; v ; v = v->next)
2876 pbx_builtin_setvar_helper(tmp,v->name,v->value);
2881 /*! \brief get_sdp_by_line: Reads one line of SIP message body */
2882 static char* get_sdp_by_line(char* line, char *name, int nameLen)
2884 if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
2885 return ast_skip_blanks(line + nameLen + 1);
2890 /*! \brief get_sdp: Gets all kind of SIP message bodies, including SDP,
2891 but the name wrongly applies _only_ sdp */
2892 static char *get_sdp(struct sip_request *req, char *name)
2895 int len = strlen(name);
2898 for (x=0; x<req->lines; x++) {
2899 r = get_sdp_by_line(req->line[x], name, len);
2907 static void sdpLineNum_iterator_init(int* iterator)
2912 static char* get_sdp_iterate(int* iterator,
2913 struct sip_request *req, char *name)
2915 int len = strlen(name);
2918 while (*iterator < req->lines) {
2919 r = get_sdp_by_line(req->line[(*iterator)++], name, len);
2926 static char *find_alias(const char *name, char *_default)
2929 for (x=0;x<sizeof(aliases) / sizeof(aliases[0]); x++)
2930 if (!strcasecmp(aliases[x].fullname, name))
2931 return aliases[x].shortname;
2935 static char *__get_header(struct sip_request *req, char *name, int *start)
2940 * Technically you can place arbitrary whitespace both before and after the ':' in
2941 * a header, although RFC3261 clearly says you shouldn't before, and place just
2942 * one afterwards. If you shouldn't do it, what absolute idiot decided it was
2943 * a good idea to say you can do it, and if you can do it, why in the hell would.
2944 * you say you shouldn't.
2945 * Anyways, pedanticsipchecking controls whether we allow spaces before ':',
2946 * and we always allow spaces after that for compatibility.
2948 for (pass = 0; name && pass < 2;pass++) {
2949 int x, len = strlen(name);
2950 for (x=*start; x<req->headers; x++) {
2951 if (!strncasecmp(req->header[x], name, len)) {
2952 char *r = req->header[x] + len; /* skip name */
2953 if (pedanticsipchecking)
2954 r = ast_skip_blanks(r);
2958 return ast_skip_blanks(r+1);
2962 if (pass == 0) /* Try aliases */
2963 name = find_alias(name, NULL);
2966 /* Don't return NULL, so get_header is always a valid pointer */
2970 /*! \brief get_header: Get header from SIP request ---*/
2971 static char *get_header(struct sip_request *req, char *name)
2974 return __get_header(req, name, &start);
2977 /*! \brief sip_rtp_read: Read RTP from network ---*/
2978 static struct ast_frame *sip_rtp_read(struct ast_channel *ast, struct sip_pvt *p)
2980 /* Retrieve audio/etc from channel. Assumes p->lock is already held. */
2981 struct ast_frame *f;
2982 static struct ast_frame null_frame = { AST_FRAME_NULL, };
2985 /* We have no RTP allocated for this channel */
2991 f = ast_rtp_read(p->rtp); /* RTP Audio */
2994 f = ast_rtcp_read(p->rtp); /* RTCP Control Channel */
2997 f = ast_rtp_read(p->vrtp); /* RTP Video */
3000 f = ast_rtcp_read(p->vrtp); /* RTCP Control Channel for video */
3005 /* Don't forward RFC2833 if we're not supposed to */
3006 if (f && (f->frametype == AST_FRAME_DTMF) && (ast_test_flag(p, SIP_DTMF) != SIP_DTMF_RFC2833))
3009 /* We already hold the channel lock */
3010 if (f->frametype == AST_FRAME_VOICE) {
3011 if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
3012 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
3013 p->owner->nativeformats = (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
3014 ast_set_read_format(p->owner, p->owner->readformat);
3015 ast_set_write_format(p->owner, p->owner->writeformat);
3017 if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
3018 f = ast_dsp_process(p->owner, p->vad, f);
3019 if (f && (f->frametype == AST_FRAME_DTMF))
3020 ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
3027 /*! \brief sip_read: Read SIP RTP from channel */
3028 static struct ast_frame *sip_read(struct ast_channel *ast)
3030 struct ast_frame *fr;
3031 struct sip_pvt *p = ast->tech_pvt;
3032 ast_mutex_lock(&p->lock);
3033 fr = sip_rtp_read(ast, p);
3034 time(&p->lastrtprx);
3035 ast_mutex_unlock(&p->lock);
3039 /*! \brief build_callid_pvt: Build SIP Call-ID value for a non-REGISTER transaction ---*/
3040 static void build_callid_pvt(struct sip_pvt *pvt)
3044 char iabuf[INET_ADDRSTRLEN];
3047 val[x] = thread_safe_rand();
3049 if (ast_strlen_zero(pvt->fromdomain))
3050 /* It's not important that we really use our right IP here... */
3051 ast_string_field_build(pvt, callid, "%08x%08x%08x%08x@%s",
3052 val[0], val[1], val[2], val[3],
3053 ast_inet_ntoa(iabuf, sizeof(iabuf), pvt->ourip));
3055 ast_string_field_build(pvt, callid, "%08x%08x%08x%08x@%s",
3056 val[0], val[1], val[2], val[3],
3060 /*! \brief build_callid_registry: Build SIP Call-ID value for a REGISTER transaction ---*/
3061 static void build_callid_registry(struct sip_registry *reg, struct in_addr ourip, const char *fromdomain)
3065 char iabuf[INET_ADDRSTRLEN];
3068 val[x] = thread_safe_rand();
3070 if (ast_strlen_zero(fromdomain))
3071 /* It's not important that we really use our right IP here... */
3072 ast_string_field_build(reg, callid, "%08x%08x%08x%08x@%s",
3073 val[0], val[1], val[2], val[3],
3074 ast_inet_ntoa(iabuf, sizeof(iabuf), ourip));
3076 ast_string_field_build(reg, callid, "%08x%08x%08x%08x@%s",
3077 val[0], val[1], val[2], val[3],
3081 static void make_our_tag(char *tagbuf, size_t len)
3083 snprintf(tagbuf, len, "as%08x", thread_safe_rand());
3086 /*! \brief sip_alloc: Allocate SIP_PVT structure and set defaults ---*/
3087 static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *sin,
3088 int useglobal_nat, const int intended_method)
3092 if (!(p = ast_calloc(1, sizeof(*p))))
3095 if (ast_string_field_init(p)) {
3100 ast_mutex_init(&p->lock);
3102 p->method = intended_method;
3105 p->subscribed = NONE;
3108 if (intended_method != SIP_OPTIONS) /* Peerpoke has it's own system */
3109 p->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
3112 p->osptimelimit = 0;
3115 memcpy(&p->sa, sin, sizeof(p->sa));
3116 if (ast_sip_ouraddrfor(&p->sa.sin_addr,&p->ourip))
3117 memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
3119 memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
3122 p->branch = thread_safe_rand();
3123 make_our_tag(p->tag, sizeof(p->tag));
3124 /* Start with 101 instead of 1 */
3127 if (sip_methods[intended_method].need_rtp) {
3128 p->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
3130 p->vrtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
3131 if (!p->rtp || (videosupport && !p->vrtp)) {
3132 ast_log(LOG_WARNING, "Unable to create RTP audio %s session: %s\n", videosupport ? "and video" : "", strerror(errno));
3133 ast_mutex_destroy(&p->lock);
3135 ast_variables_destroy(p->chanvars);
3141 ast_rtp_settos(p->rtp, tos);
3143 ast_rtp_settos(p->vrtp, tos);
3144 p->rtptimeout = global_rtptimeout;
3145 p->rtpholdtimeout = global_rtpholdtimeout;
3146 p->rtpkeepalive = global_rtpkeepalive;
3149 if (useglobal_nat && sin) {
3150 /* Setup NAT structure according to global settings if we have an address */
3151 ast_copy_flags(p, &global_flags, SIP_NAT);
3152 memcpy(&p->recv, sin, sizeof(p->recv));
3154 ast_rtp_setnat(p->rtp, (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE));
3156 ast_rtp_setnat(p->vrtp, (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE));
3159 if (p->method != SIP_REGISTER)
3160 ast_string_field_set(p, fromdomain, default_fromdomain);
3163 build_callid_pvt(p);
3165 ast_string_field_set(p, callid, callid);
3166 ast_copy_flags(p, &global_flags, SIP_FLAGS_TO_COPY);
3167 /* Assign default music on hold class */
3168 ast_string_field_set(p, musicclass, global_musicclass);
3169 p->capability = global_capability;
3170 if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_RFC2833) || (ast_test_flag(p, SIP_DTMF) == SIP_DTMF_AUTO))
3171 p->noncodeccapability |= AST_RTP_DTMF;
3172 ast_string_field_set(p, context, default_context);
3174 /* Add to active dialog list */
3175 ast_mutex_lock(&iflock);
3178 ast_mutex_unlock(&iflock);
3180 ast_log(LOG_DEBUG, "Allocating new SIP dialog for %s - %s (%s)\n", callid ? callid : "(No Call-ID)", sip_methods[intended_method].text, p->rtp ? "With RTP" : "No RTP");
3184 /*! \brief find_call: Connect incoming SIP message to current dialog or create new dialog structure */
3185 /* Called by handle_request, sipsock_read */
3186 static struct sip_pvt *find_call(struct sip_request *req, struct sockaddr_in *sin, const int intended_method)
3194 callid = get_header(req, "Call-ID");
3196 if (pedanticsipchecking) {
3197 /* In principle Call-ID's uniquely identify a call, but with a forking SIP proxy
3198 we need more to identify a branch - so we have to check branch, from
3199 and to tags to identify a call leg.
3200 For Asterisk to behave correctly, you need to turn on pedanticsipchecking
3203 if (gettag(req, "To", totag, sizeof(totag)))
3204 ast_set_flag(req, SIP_PKT_WITH_TOTAG); /* Used in handle_request/response */
3205 gettag(req, "From", fromtag, sizeof(fromtag));
3207 if (req->method == SIP_RESPONSE)
3213 if (option_debug > 4 )
3214 ast_log(LOG_DEBUG, "= Looking for Call ID: %s (Checking %s) --From tag %s --To-tag %s \n", callid, req->method==SIP_RESPONSE ? "To" : "From", fromtag, totag);
3217 ast_mutex_lock(&iflock);
3219 while(p) { /* In pedantic, we do not want packets with bad syntax to be connected to a PVT */
3221 if (req->method == SIP_REGISTER)
3222 found = (!strcmp(p->callid, callid));
3224 found = (!strcmp(p->callid, callid) &&
3225 (!pedanticsipchecking || !tag || ast_strlen_zero(p->theirtag) || !strcmp(p->theirtag, tag))) ;
3227 if (option_debug > 4)
3228 ast_log(LOG_DEBUG, "= %s Their Call ID: %s Their Tag %s Our tag: %s\n", found ? "Found" : "No match", p->callid, p->theirtag, p->tag);
3230 /* If we get a new request within an existing to-tag - check the to tag as well */
3231 if (pedanticsipchecking && found && req->method != SIP_RESPONSE) { /* SIP Request */
3232 if (p->tag[0] == '\0' && totag[0]) {
3233 /* We have no to tag, but they have. Wrong dialog */
3235 } else if (totag[0]) { /* Both have tags, compare them */
3236 if (strcmp(totag, p->tag)) {
3237 found = 0; /* This is not our packet */
3240 if (!found && option_debug > 4)
3241 ast_log(LOG_DEBUG, "= Being pedantic: This is not our match on request: Call ID: %s Ourtag <null> Totag %s Method %s\n", p->callid, totag, sip_methods[req->method].text);
3246 /* Found the call */
3247 ast_mutex_lock(&p->lock);
3248 ast_mutex_unlock(&iflock);
3253 ast_mutex_unlock(&iflock);
3254 p = sip_alloc(callid, sin, 1, intended_method);
3256 ast_mutex_lock(&p->lock);
3260 /*! \brief sip_register: Parse register=> line in sip.conf and add to registry */
3261 static int sip_register(char *value, int lineno)
3263 struct sip_registry *reg;
3265 char *username=NULL, *hostname=NULL, *secret=NULL, *authuser=NULL;
3272 ast_copy_string(copy, value, sizeof(copy));
3275 hostname = strrchr(stringp, '@');
3280 if (ast_strlen_zero(username) || ast_strlen_zero(hostname)) {
3281 ast_log(LOG_WARNING, "Format for registration is user[:secret[:authuser]]@host[:port][/contact] at line %d\n", lineno);
3285 username = strsep(&stringp, ":");
3287 secret = strsep(&stringp, ":");
3289 authuser = strsep(&stringp, ":");
3292 hostname = strsep(&stringp, "/");
3294 contact = strsep(&stringp, "/");
3295 if (ast_strlen_zero(contact))
3298 hostname = strsep(&stringp, ":");
3299 porta = strsep(&stringp, ":");
3301 if (porta && !atoi(porta)) {
3302 ast_log(LOG_WARNING, "%s is not a valid port number at line %d\n", porta, lineno);
3305 if (!(reg = ast_calloc(1, sizeof(*reg))))
3308 if (ast_string_field_init(reg)) {
3309 ast_log(LOG_ERROR, "Out of memory. Can't allocate SIP registry entry\n");
3316 ast_string_field_set(reg, contact, contact);
3318 ast_string_field_set(reg, username, username);
3320 ast_string_field_set(reg, hostname, hostname);
3322 ast_string_field_set(reg, authuser, authuser);
3324 ast_string_field_set(reg, secret, secret);
3327 reg->refresh = default_expiry;
3328 reg->portno = porta ? atoi(porta) : 0;
3329 reg->callid_valid = 0;
3331 ASTOBJ_CONTAINER_LINK(®l, reg);
3332 ASTOBJ_UNREF(reg,sip_registry_destroy);
3336 /*! \brief lws2sws: Parse multiline SIP headers into one header */
3337 /* This is enabled if pedanticsipchecking is enabled */
3338 static int lws2sws(char *msgbuf, int len)
3344 /* Eliminate all CRs */
3345 if (msgbuf[h] == '\r') {
3349 /* Check for end-of-line */
3350 if (msgbuf[h] == '\n') {
3351 /* Check for end-of-message */
3354 /* Check for a continuation line */
3355 if (msgbuf[h + 1] == ' ' || msgbuf[h + 1] == '\t') {
3356 /* Merge continuation line */
3360 /* Propagate LF and start new line */
3361 msgbuf[t++] = msgbuf[h++];
3365 if (msgbuf[h] == ' ' || msgbuf[h] == '\t') {
3370 msgbuf[t++] = msgbuf[h++];
3374 msgbuf[t++] = msgbuf[h++];
3382 /*! \brief parse_request: Parse a SIP message ----*/
3383 static void parse_request(struct sip_request *req)
3385 /* Divide fields by NULL's */
3391 /* First header starts immediately */
3395 /* We've got a new header */
3398 if (sipdebug && option_debug > 3)
3399 ast_log(LOG_DEBUG, "Header %d: %s (%d)\n", f, req->header[f], (int) strlen(req->header[f]));
3400 if (ast_strlen_zero(req->header[f])) {
3401 /* Line by itself means we're now in content */
3405 if (f >= SIP_MAX_HEADERS - 1) {
3406 ast_log(LOG_WARNING, "Too many SIP headers. Ignoring.\n");
3409 req->header[f] = c + 1;
3410 } else if (*c == '\r') {
3411 /* Ignore but eliminate \r's */
3416 /* Check for last header */
3417 if (!ast_strlen_zero(req->header[f])) {
3418 if (sipdebug && option_debug > 3)
3419 ast_log(LOG_DEBUG, "Header %d: %s (%d)\n", f, req->header[f], (int) strlen(req->header[f]));
3423 /* Now we process any mime content */
3428 /* We've got a new line */
3430 if (sipdebug && option_debug > 3)
3431 ast_log(LOG_DEBUG, "Line: %s (%d)\n", req->line[f], (int) strlen(req->line[f]));
3432 if (f >= SIP_MAX_LINES - 1) {
3433 ast_log(LOG_WARNING, "Too many SDP lines. Ignoring.\n");
3436 req->line[f] = c + 1;
3437 } else if (*c == '\r') {
3438 /* Ignore and eliminate \r's */
3443 /* Check for last line */
3444 if (!ast_strlen_zero(req->line[f]))
3448 ast_log(LOG_WARNING, "Odd content, extra stuff left over ('%s')\n", c);
3449 /* Split up the first line parts */
3450 determine_firstline_parts(req);
3453 /*! \brief process_sdp: Process SIP SDP and activate RTP channels---*/
3454 static int process_sdp(struct sip_pvt *p, struct sip_request *req)
3460 char iabuf[INET_ADDRSTRLEN];
3464 int peercapability, peernoncodeccapability;
3465 int vpeercapability=0, vpeernoncodeccapability=0;
3466 struct sockaddr_in sin;
3469 struct ast_hostent ahp;
3471 int destiterator = 0;
3475 int debug=sip_debug_test_pvt(p);
3476 struct ast_channel *bridgepeer = NULL;
3479 ast_log(LOG_ERROR, "Got SDP but have no RTP session allocated.\n");
3483 /* Update our last rtprx when we receive an SDP, too */
3484 time(&p->lastrtprx);
3485 time(&p->lastrtptx);
3487 /* Get codec and RTP info from SDP */
3488 if (strcasecmp(get_header(req, "Content-Type"), "application/sdp")) {
3489 ast_log(LOG_NOTICE, "Content is '%s', not 'application/sdp'\n", get_header(req, "Content-Type"));
3492 m = get_sdp(req, "m");
3493 sdpLineNum_iterator_init(&destiterator);
3494 c = get_sdp_iterate(&destiterator, req, "c");
3495 if (ast_strlen_zero(m) || ast_strlen_zero(c)) {
3496 ast_log(LOG_WARNING, "Insufficient information for SDP (m = '%s', c = '%s')\n", m, c);