2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2005, 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 * Implementation of RFC 3261 - without S/MIME, TCP and TLS support
24 * Configuration file \link Config_sip sip.conf \endlink
28 * \todo Better support of forking
36 #include <sys/socket.h>
37 #include <sys/ioctl.h>
44 #include <sys/signal.h>
45 #include <netinet/in.h>
46 #include <netinet/in_systm.h>
47 #include <arpa/inet.h>
48 #include <netinet/ip.h>
53 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
55 #include "asterisk/lock.h"
56 #include "asterisk/channel.h"
57 #include "asterisk/config.h"
58 #include "asterisk/logger.h"
59 #include "asterisk/module.h"
60 #include "asterisk/pbx.h"
61 #include "asterisk/options.h"
62 #include "asterisk/lock.h"
63 #include "asterisk/sched.h"
64 #include "asterisk/io.h"
65 #include "asterisk/rtp.h"
66 #include "asterisk/acl.h"
67 #include "asterisk/manager.h"
68 #include "asterisk/callerid.h"
69 #include "asterisk/cli.h"
70 #include "asterisk/app.h"
71 #include "asterisk/musiconhold.h"
72 #include "asterisk/dsp.h"
73 #include "asterisk/features.h"
74 #include "asterisk/acl.h"
75 #include "asterisk/srv.h"
76 #include "asterisk/astdb.h"
77 #include "asterisk/causes.h"
78 #include "asterisk/utils.h"
79 #include "asterisk/file.h"
80 #include "asterisk/astobj.h"
81 #include "asterisk/dnsmgr.h"
82 #include "asterisk/devicestate.h"
83 #include "asterisk/linkedlists.h"
86 #include "asterisk/astosp.h"
89 #ifndef DEFAULT_USERAGENT
90 #define DEFAULT_USERAGENT "Asterisk PBX"
93 #define VIDEO_CODEC_MASK 0x1fc0000 /* Video codecs from H.261 thru AST_FORMAT_MAX_VIDEO */
95 #define IPTOS_MINCOST 0x02
98 /* #define VOCAL_DATA_HACK */
101 #define DEFAULT_DEFAULT_EXPIRY 120
102 #define DEFAULT_MAX_EXPIRY 3600
103 #define DEFAULT_REGISTRATION_TIMEOUT 20
104 #define DEFAULT_MAX_FORWARDS "70"
106 /* guard limit must be larger than guard secs */
107 /* guard min must be < 1000, and should be >= 250 */
108 #define EXPIRY_GUARD_SECS 15 /* How long before expiry do we reregister */
109 #define EXPIRY_GUARD_LIMIT 30 /* Below here, we use EXPIRY_GUARD_PCT instead of
111 #define EXPIRY_GUARD_MIN 500 /* This is the minimum guard time applied. If
112 GUARD_PCT turns out to be lower than this, it
113 will use this time instead.
114 This is in milliseconds. */
115 #define EXPIRY_GUARD_PCT 0.20 /* Percentage of expires timeout to use when
116 below EXPIRY_GUARD_LIMIT */
118 static int max_expiry = DEFAULT_MAX_EXPIRY;
119 static int default_expiry = DEFAULT_DEFAULT_EXPIRY;
122 #define MAX(a,b) ((a) > (b) ? (a) : (b))
125 #define CALLERID_UNKNOWN "Unknown"
129 #define DEFAULT_MAXMS 2000 /* Must be faster than 2 seconds by default */
130 #define DEFAULT_FREQ_OK 60 * 1000 /* How often to check for the host to be up */
131 #define DEFAULT_FREQ_NOTOK 10 * 1000 /* How often to check, if the host is down... */
133 #define DEFAULT_RETRANS 1000 /* How frequently to retransmit */
134 /* 2 * 500 ms in RFC 3261 */
135 #define MAX_RETRANS 6 /* Try only 6 times for retransmissions, a total of 7 transmissions */
136 #define MAX_AUTHTRIES 3 /* Try authentication three times, then fail */
139 #define DEBUG_READ 0 /* Recieved data */
140 #define DEBUG_SEND 1 /* Transmit data */
142 static const char desc[] = "Session Initiation Protocol (SIP)";
143 static const char channeltype[] = "SIP";
144 static const char config[] = "sip.conf";
145 static const char notify_config[] = "sip_notify.conf";
150 /* Do _NOT_ make any changes to this enum, or the array following it;
151 if you think you are doing the right thing, you are probably
152 not doing the right thing. If you think there are changes
153 needed, get someone else to review them first _before_
154 submitting a patch. If these two lists do not match properly
155 bad things will happen.
158 enum subscriptiontype {
167 static const struct cfsubscription_types {
168 enum subscriptiontype type;
169 const char * const event;
170 const char * const mediatype;
171 const char * const text;
172 } subscription_types[] = {
173 { NONE, "-", "unknown", "unknown" },
174 /* IETF draft: draft-ietf-sipping-dialog-package-05.txt */
175 { DIALOG_INFO_XML, "dialog", "application/dialog-info+xml", "dialog-info+xml" },
176 { CPIM_PIDF_XML, "presence", "application/cpim-pidf+xml", "cpim-pidf+xml" }, /* RFC 3863 */
177 { PIDF_XML, "presence", "application/pidf+xml", "pidf+xml" }, /* RFC 3863 */
178 { XPIDF_XML, "presence", "application/xpidf+xml", "xpidf+xml" } /* Pre-RFC 3863 with MS additions */
205 /*! XXX Note that sip_methods[i].id == i must hold or the code breaks */
206 static const struct cfsip_methods {
208 int need_rtp; /*!< when this is the 'primary' use for a pvt structure, does it need RTP? */
211 { SIP_UNKNOWN, RTP, "-UNKNOWN-" },
212 { SIP_RESPONSE, NO_RTP, "SIP/2.0" },
213 { SIP_REGISTER, NO_RTP, "REGISTER" },
214 { SIP_OPTIONS, NO_RTP, "OPTIONS" },
215 { SIP_NOTIFY, NO_RTP, "NOTIFY" },
216 { SIP_INVITE, RTP, "INVITE" },
217 { SIP_ACK, NO_RTP, "ACK" },
218 { SIP_PRACK, NO_RTP, "PRACK" },
219 { SIP_BYE, NO_RTP, "BYE" },
220 { SIP_REFER, NO_RTP, "REFER" },
221 { SIP_SUBSCRIBE, NO_RTP, "SUBSCRIBE" },
222 { SIP_MESSAGE, NO_RTP, "MESSAGE" },
223 { SIP_UPDATE, NO_RTP, "UPDATE" },
224 { SIP_INFO, NO_RTP, "INFO" },
225 { SIP_CANCEL, NO_RTP, "CANCEL" },
226 { SIP_PUBLISH, NO_RTP, "PUBLISH" }
229 /*! \brief Structure for conversion between compressed SIP and "normal" SIP */
230 static const struct cfalias {
231 char * const fullname;
232 char * const shortname;
234 { "Content-Type", "c" },
235 { "Content-Encoding", "e" },
239 { "Content-Length", "l" },
242 { "Supported", "k" },
244 { "Referred-By", "b" },
245 { "Allow-Events", "u" },
248 { "Accept-Contact", "a" },
249 { "Reject-Contact", "j" },
250 { "Request-Disposition", "d" },
251 { "Session-Expires", "x" },
254 /*! Define SIP option tags, used in Require: and Supported: headers
255 We need to be aware of these properties in the phones to use
256 the replace: header. We should not do that without knowing
257 that the other end supports it...
258 This is nothing we can configure, we learn by the dialog
259 Supported: header on the REGISTER (peer) or the INVITE
261 We are not using many of these today, but will in the future.
262 This is documented in RFC 3261
265 #define NOT_SUPPORTED 0
267 #define SIP_OPT_REPLACES (1 << 0)
268 #define SIP_OPT_100REL (1 << 1)
269 #define SIP_OPT_TIMER (1 << 2)
270 #define SIP_OPT_EARLY_SESSION (1 << 3)
271 #define SIP_OPT_JOIN (1 << 4)
272 #define SIP_OPT_PATH (1 << 5)
273 #define SIP_OPT_PREF (1 << 6)
274 #define SIP_OPT_PRECONDITION (1 << 7)
275 #define SIP_OPT_PRIVACY (1 << 8)
276 #define SIP_OPT_SDP_ANAT (1 << 9)
277 #define SIP_OPT_SEC_AGREE (1 << 10)
278 #define SIP_OPT_EVENTLIST (1 << 11)
279 #define SIP_OPT_GRUU (1 << 12)
280 #define SIP_OPT_TARGET_DIALOG (1 << 13)
282 /*! \brief List of well-known SIP options. If we get this in a require,
283 we should check the list and answer accordingly. */
284 static const struct cfsip_options {
285 int id; /*!< Bitmap ID */
286 int supported; /*!< Supported by Asterisk ? */
287 char * const text; /*!< Text id, as in standard */
289 /* Replaces: header for transfer */
290 { SIP_OPT_REPLACES, SUPPORTED, "replaces" },
291 /* RFC3262: PRACK 100% reliability */
292 { SIP_OPT_100REL, NOT_SUPPORTED, "100rel" },
293 /* SIP Session Timers */
294 { SIP_OPT_TIMER, NOT_SUPPORTED, "timer" },
295 /* RFC3959: SIP Early session support */
296 { SIP_OPT_EARLY_SESSION, NOT_SUPPORTED, "early-session" },
297 /* SIP Join header support */
298 { SIP_OPT_JOIN, NOT_SUPPORTED, "join" },
299 /* RFC3327: Path support */
300 { SIP_OPT_PATH, NOT_SUPPORTED, "path" },
301 /* RFC3840: Callee preferences */
302 { SIP_OPT_PREF, NOT_SUPPORTED, "pref" },
303 /* RFC3312: Precondition support */
304 { SIP_OPT_PRECONDITION, NOT_SUPPORTED, "precondition" },
305 /* RFC3323: Privacy with proxies*/
306 { SIP_OPT_PRIVACY, NOT_SUPPORTED, "privacy" },
307 /* RFC4092: Usage of the SDP ANAT Semantics in the SIP */
308 { SIP_OPT_SDP_ANAT, NOT_SUPPORTED, "sdp-anat" },
309 /* RFC3329: Security agreement mechanism */
310 { SIP_OPT_SEC_AGREE, NOT_SUPPORTED, "sec_agree" },
311 /* SIMPLE events: draft-ietf-simple-event-list-07.txt */
312 { SIP_OPT_EVENTLIST, NOT_SUPPORTED, "eventlist" },
313 /* GRUU: Globally Routable User Agent URI's */
314 { SIP_OPT_GRUU, NOT_SUPPORTED, "gruu" },
315 /* Target-dialog: draft-ietf-sip-target-dialog-00.txt */
316 { SIP_OPT_TARGET_DIALOG,NOT_SUPPORTED, "target-dialog" },
320 /*! \brief SIP Methods we support */
321 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY"
323 /*! \brief SIP Extensions we support */
324 #define SUPPORTED_EXTENSIONS "replaces"
326 #define DEFAULT_SIP_PORT 5060 /*!< From RFC 3261 (former 2543) */
327 #define SIP_MAX_PACKET 4096 /*!< Also from RFC 3261 (2543), should sub headers tho */
329 static char default_useragent[AST_MAX_EXTENSION] = DEFAULT_USERAGENT;
331 #define DEFAULT_CONTEXT "default"
332 static char default_context[AST_MAX_CONTEXT] = DEFAULT_CONTEXT;
333 static char default_subscribecontext[AST_MAX_CONTEXT];
335 #define DEFAULT_VMEXTEN "asterisk"
336 static char global_vmexten[AST_MAX_EXTENSION] = DEFAULT_VMEXTEN;
338 static char default_language[MAX_LANGUAGE] = "";
340 #define DEFAULT_CALLERID "asterisk"
341 static char default_callerid[AST_MAX_EXTENSION] = DEFAULT_CALLERID;
343 static char default_fromdomain[AST_MAX_EXTENSION] = "";
345 #define DEFAULT_NOTIFYMIME "application/simple-message-summary"
346 static char default_notifymime[AST_MAX_EXTENSION] = DEFAULT_NOTIFYMIME;
348 static int global_notifyringing = 1; /*!< Send notifications on ringing */
350 static int default_qualify = 0; /*!< Default Qualify= setting */
352 static struct ast_flags global_flags = {0}; /*!< global SIP_ flags */
353 static struct ast_flags global_flags_page2 = {0}; /*!< more global SIP_ flags */
355 static int srvlookup = 0; /*!< SRV Lookup on or off. Default is off, RFC behavior is on */
357 static int pedanticsipchecking = 0; /*!< Extra checking ? Default off */
359 static int autocreatepeer = 0; /*!< Auto creation of peers at registration? Default off. */
361 static int relaxdtmf = 0;
363 static int global_rtptimeout = 0;
365 static int global_rtpholdtimeout = 0;
367 static int global_rtpkeepalive = 0;
369 static int global_reg_timeout = DEFAULT_REGISTRATION_TIMEOUT;
370 static int global_regattempts_max = 0;
372 /* Object counters */
373 static int suserobjs = 0;
374 static int ruserobjs = 0;
375 static int speerobjs = 0;
376 static int rpeerobjs = 0;
377 static int apeerobjs = 0;
378 static int regobjs = 0;
380 static int global_allowguest = 1; /*!< allow unauthenticated users/peers to connect? */
382 #define DEFAULT_MWITIME 10
383 static int global_mwitime = DEFAULT_MWITIME; /*!< Time between MWI checks for peers */
385 static int usecnt =0;
386 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
388 AST_MUTEX_DEFINE_STATIC(rand_lock);
390 /*! \brief Protect the interface list (of sip_pvt's) */
391 AST_MUTEX_DEFINE_STATIC(iflock);
393 /*! \brief Protect the monitoring thread, so only one process can kill or start it, and not
394 when it's doing something critical. */
395 AST_MUTEX_DEFINE_STATIC(netlock);
397 AST_MUTEX_DEFINE_STATIC(monlock);
399 /*! \brief This is the thread for the monitor which checks for input on the channels
400 which are not currently in use. */
401 static pthread_t monitor_thread = AST_PTHREADT_NULL;
403 static int restart_monitor(void);
405 /*! \brief Codecs that we support by default: */
406 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
407 static int noncodeccapability = AST_RTP_DTMF;
409 static struct in_addr __ourip;
410 static struct sockaddr_in outboundproxyip;
413 static struct sockaddr_in debugaddr;
417 static int videosupport = 0;
419 static int compactheaders = 0; /*!< send compact sip headers */
421 static int recordhistory = 0; /*!< Record SIP history. Off by default */
422 static int dumphistory = 0; /*!< Dump history to verbose before destroying SIP dialog */
424 static char global_musicclass[MAX_MUSICCLASS] = ""; /*!< Global music on hold class */
425 #define DEFAULT_REALM "asterisk"
426 static char global_realm[MAXHOSTNAMELEN] = DEFAULT_REALM; /*!< Default realm */
427 static char regcontext[AST_MAX_CONTEXT] = ""; /*!< Context for auto-extensions */
429 #define DEFAULT_EXPIRY 900 /*!< Expire slowly */
430 static int expiry = DEFAULT_EXPIRY;
432 static struct sched_context *sched;
433 static struct io_context *io;
435 #define SIP_MAX_HEADERS 64 /*!< Max amount of SIP headers to read */
436 #define SIP_MAX_LINES 64 /*!< Max amount of lines in SIP attachment (like SDP) */
438 #define DEC_CALL_LIMIT 0
439 #define INC_CALL_LIMIT 1
441 static struct ast_codec_pref prefs;
444 /*! \brief sip_request: The data grabbed from the UDP socket */
446 char *rlPart1; /*!< SIP Method Name or "SIP/2.0" protocol version */
447 char *rlPart2; /*!< The Request URI or Response Status */
448 int len; /*!< Length */
449 int headers; /*!< # of SIP Headers */
450 int method; /*!< Method of this request */
451 char *header[SIP_MAX_HEADERS];
452 int lines; /*!< SDP Content */
453 char *line[SIP_MAX_LINES];
454 char data[SIP_MAX_PACKET];
455 int debug; /*!< Debug flag for this packet */
456 unsigned int flags; /*!< SIP_PKT Flags for this packet */
461 /*! \brief Parameters to the transmit_invite function */
462 struct sip_invite_param {
463 const char *distinctive_ring; /*!< Distinctive ring header */
464 char *osptoken; /*!< OSP token for this call */
465 int addsipheaders; /*!< Add extra SIP headers */
466 const char *uri_options; /*!< URI options to add to the URI */
467 const char *vxml_url; /*!< VXML url for Cisco phones */
468 char *auth; /*!< Authentication */
469 char *authheader; /*!< Auth header */
470 enum sip_auth_type auth_type; /*!< Authentication type */
474 struct sip_route *next;
479 SIP_DOMAIN_AUTO, /*!< This domain is auto-configured */
480 SIP_DOMAIN_CONFIG, /*!< This domain is from configuration */
484 char domain[MAXHOSTNAMELEN]; /*!< SIP domain we are responsible for */
485 char context[AST_MAX_EXTENSION]; /*!< Incoming context for this domain */
486 enum domain_mode mode; /*!< How did we find this domain? */
487 AST_LIST_ENTRY(domain) list; /*!< List mechanics */
490 static AST_LIST_HEAD_STATIC(domain_list, domain); /*!< The SIP domain list */
492 int allow_external_domains; /*!< Accept calls to external SIP domains? */
494 /*! \brief sip_history: Structure for saving transactions within a SIP dialog */
497 struct sip_history *next;
500 /*! \brief sip_auth: Creadentials for authentication to other SIP services */
502 char realm[AST_MAX_EXTENSION]; /*!< Realm in which these credentials are valid */
503 char username[256]; /*!< Username */
504 char secret[256]; /*!< Secret */
505 char md5secret[256]; /*!< MD5Secret */
506 struct sip_auth *next; /*!< Next auth structure in list */
509 #define SIP_ALREADYGONE (1 << 0) /*!< Whether or not we've already been destroyed by our peer */
510 #define SIP_NEEDDESTROY (1 << 1) /*!< if we need to be destroyed */
511 #define SIP_NOVIDEO (1 << 2) /*!< Didn't get video in invite, don't offer */
512 #define SIP_RINGING (1 << 3) /*!< Have sent 180 ringing */
513 #define SIP_PROGRESS_SENT (1 << 4) /*!< Have sent 183 message progress */
514 #define SIP_NEEDREINVITE (1 << 5) /*!< Do we need to send another reinvite? */
515 #define SIP_PENDINGBYE (1 << 6) /*!< Need to send bye after we ack? */
516 #define SIP_GOTREFER (1 << 7) /*!< Got a refer? */
517 #define SIP_PROMISCREDIR (1 << 8) /*!< Promiscuous redirection */
518 #define SIP_TRUSTRPID (1 << 9) /*!< Trust RPID headers? */
519 #define SIP_USEREQPHONE (1 << 10) /*!< Add user=phone to numeric URI. Default off */
520 #define SIP_REALTIME (1 << 11) /*!< Flag for realtime users */
521 #define SIP_USECLIENTCODE (1 << 12) /*!< Trust X-ClientCode info message */
522 #define SIP_OUTGOING (1 << 13) /*!< Is this an outgoing call? */
523 #define SIP_SELFDESTRUCT (1 << 14)
524 #define SIP_DYNAMIC (1 << 15) /*!< Is this a dynamic peer? */
525 /* --- Choices for DTMF support in SIP channel */
526 #define SIP_DTMF (3 << 16) /*!< three settings, uses two bits */
527 #define SIP_DTMF_RFC2833 (0 << 16) /*!< RTP DTMF */
528 #define SIP_DTMF_INBAND (1 << 16) /*!< Inband audio, only for ULAW/ALAW */
529 #define SIP_DTMF_INFO (2 << 16) /*!< SIP Info messages */
530 #define SIP_DTMF_AUTO (3 << 16) /*!< AUTO switch between rfc2833 and in-band DTMF */
532 #define SIP_NAT (3 << 18) /*!< four settings, uses two bits */
533 #define SIP_NAT_NEVER (0 << 18) /*!< No nat support */
534 #define SIP_NAT_RFC3581 (1 << 18)
535 #define SIP_NAT_ROUTE (2 << 18)
536 #define SIP_NAT_ALWAYS (3 << 18)
537 /* re-INVITE related settings */
538 #define SIP_REINVITE (3 << 20) /*!< two bits used */
539 #define SIP_CAN_REINVITE (1 << 20) /*!< allow peers to be reinvited to send media directly p2p */
540 #define SIP_REINVITE_UPDATE (2 << 20) /*!< use UPDATE (RFC3311) when reinviting this peer */
541 /* "insecure" settings */
542 #define SIP_INSECURE_PORT (1 << 22) /*!< don't require matching port for incoming requests */
543 #define SIP_INSECURE_INVITE (1 << 23) /*!< don't require authentication for incoming INVITEs */
544 /* Sending PROGRESS in-band settings */
545 #define SIP_PROG_INBAND (3 << 24) /*!< three settings, uses two bits */
546 #define SIP_PROG_INBAND_NEVER (0 << 24)
547 #define SIP_PROG_INBAND_NO (1 << 24)
548 #define SIP_PROG_INBAND_YES (2 << 24)
549 /* Open Settlement Protocol authentication */
550 #define SIP_OSPAUTH (3 << 26) /*!< four settings, uses two bits */
551 #define SIP_OSPAUTH_NO (0 << 26)
552 #define SIP_OSPAUTH_GATEWAY (1 << 26)
553 #define SIP_OSPAUTH_PROXY (2 << 26)
554 #define SIP_OSPAUTH_EXCLUSIVE (3 << 26)
556 #define SIP_CALL_ONHOLD (1 << 28)
557 #define SIP_CALL_LIMIT (1 << 29)
558 /* Remote Party-ID Support */
559 #define SIP_SENDRPID (1 << 30)
561 #define SIP_FLAGS_TO_COPY \
562 (SIP_PROMISCREDIR | SIP_TRUSTRPID | SIP_SENDRPID | SIP_DTMF | SIP_REINVITE | \
563 SIP_PROG_INBAND | SIP_OSPAUTH | SIP_USECLIENTCODE | SIP_NAT | \
564 SIP_INSECURE_PORT | SIP_INSECURE_INVITE)
566 /* a new page of flags for peer */
567 #define SIP_PAGE2_RTCACHEFRIENDS (1 << 0)
568 #define SIP_PAGE2_RTUPDATE (1 << 1)
569 #define SIP_PAGE2_RTAUTOCLEAR (1 << 2)
570 #define SIP_PAGE2_IGNOREREGEXPIRE (1 << 3)
571 #define SIP_PAGE2_RT_FROMCONTACT (1 << 4)
572 #define SIP_PAGE2_DEBUG (3 << 5)
573 #define SIP_PAGE2_DEBUG_CONFIG (1 << 5)
574 #define SIP_PAGE2_DEBUG_CONSOLE (1 << 6)
576 /* SIP packet flags */
577 #define SIP_PKT_DEBUG (1 << 0) /*!< Debug this packet */
578 #define SIP_PKT_WITH_TOTAG (1 << 1) /*!< This packet has a to-tag */
580 #define sipdebug ast_test_flag(&global_flags_page2, SIP_PAGE2_DEBUG)
581 #define sipdebug_config ast_test_flag(&global_flags_page2, SIP_PAGE2_DEBUG_CONFIG)
582 #define sipdebug_console ast_test_flag(&global_flags_page2, SIP_PAGE2_DEBUG_CONSOLE)
584 static int global_rtautoclear = 120;
586 /*! \brief sip_pvt: PVT structures are used for each SIP conversation, ie. a call */
587 static struct sip_pvt {
588 ast_mutex_t lock; /*!< Channel private lock */
589 int method; /*!< SIP method of this packet */
590 char callid[80]; /*!< Global CallID */
591 char randdata[80]; /*!< Random data */
592 struct ast_codec_pref prefs; /*!< codec prefs */
593 unsigned int ocseq; /*!< Current outgoing seqno */
594 unsigned int icseq; /*!< Current incoming seqno */
595 ast_group_t callgroup; /*!< Call group */
596 ast_group_t pickupgroup; /*!< Pickup group */
597 int lastinvite; /*!< Last Cseq of invite */
598 unsigned int flags; /*!< SIP_ flags */
599 int timer_t1; /*!< SIP timer T1, ms rtt */
600 unsigned int sipoptions; /*!< Supported SIP sipoptions on the other end */
601 int capability; /*!< Special capability (codec) */
602 int jointcapability; /*!< Supported capability at both ends (codecs ) */
603 int peercapability; /*!< Supported peer capability */
604 int prefcodec; /*!< Preferred codec (outbound only) */
605 int noncodeccapability;
606 int callingpres; /*!< Calling presentation */
607 int authtries; /*!< Times we've tried to authenticate */
608 int expiry; /*!< How long we take to expire */
609 int branch; /*!< One random number */
610 char tag[11]; /*!< Another random number */
611 int sessionid; /*!< SDP Session ID */
612 int sessionversion; /*!< SDP Session Version */
613 struct sockaddr_in sa; /*!< Our peer */
614 struct sockaddr_in redirip; /*!< Where our RTP should be going if not to us */
615 struct sockaddr_in vredirip; /*!< Where our Video RTP should be going if not to us */
616 int redircodecs; /*!< Redirect codecs */
617 struct sockaddr_in recv; /*!< Received as */
618 struct in_addr ourip; /*!< Our IP */
619 struct ast_channel *owner; /*!< Who owns us */
620 char exten[AST_MAX_EXTENSION]; /*!< Extension where to start */
621 char refer_to[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO extension */
622 char referred_by[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
623 char refer_contact[AST_MAX_EXTENSION]; /*!< Place to store Contact info from a REFER extension */
624 struct sip_pvt *refer_call; /*!< Call we are referring */
625 struct sip_route *route; /*!< Head of linked list of routing steps (fm Record-Route) */
626 int route_persistant; /*!< Is this the "real" route? */
627 char from[256]; /*!< The From: header */
628 char useragent[256]; /*!< User agent in SIP request */
629 char context[AST_MAX_CONTEXT]; /*!< Context for this call */
630 char subscribecontext[AST_MAX_CONTEXT]; /*!< Subscribecontext */
631 char fromdomain[MAXHOSTNAMELEN]; /*!< Domain to show in the from field */
632 char fromuser[AST_MAX_EXTENSION]; /*!< User to show in the user field */
633 char fromname[AST_MAX_EXTENSION]; /*!< Name to show in the user field */
634 char tohost[MAXHOSTNAMELEN]; /*!< Host we should put in the "to" field */
635 char language[MAX_LANGUAGE]; /*!< Default language for this call */
636 char musicclass[MAX_MUSICCLASS]; /*!< Music on Hold class */
637 char rdnis[256]; /*!< Referring DNIS */
638 char theirtag[256]; /*!< Their tag */
639 char username[256]; /*!< [user] name */
640 char peername[256]; /*!< [peer] name, not set if [user] */
641 char authname[256]; /*!< Who we use for authentication */
642 char uri[256]; /*!< Original requested URI */
643 char okcontacturi[256]; /*!< URI from the 200 OK on INVITE */
644 char peersecret[256]; /*!< Password */
645 char peermd5secret[256];
646 struct sip_auth *peerauth; /*!< Realm authentication */
647 char cid_num[256]; /*!< Caller*ID */
648 char cid_name[256]; /*!< Caller*ID */
649 char via[256]; /*!< Via: header */
650 char fullcontact[128]; /*!< The Contact: that the UA registers with us */
651 char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
652 char our_contact[256]; /*!< Our contact header */
653 char *rpid; /*!< Our RPID header */
654 char *rpid_from; /*!< Our RPID From header */
655 char realm[MAXHOSTNAMELEN]; /*!< Authorization realm */
656 char nonce[256]; /*!< Authorization nonce */
657 int noncecount; /*!< Nonce-count */
658 char opaque[256]; /*!< Opaque nonsense */
659 char qop[80]; /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
660 char domain[MAXHOSTNAMELEN]; /*!< Authorization domain */
661 char lastmsg[256]; /*!< Last Message sent/received */
662 int amaflags; /*!< AMA Flags */
663 int pendinginvite; /*!< Any pending invite */
665 int osphandle; /*!< OSP Handle for call */
666 time_t ospstart; /*!< OSP Start time */
667 unsigned int osptimelimit; /*!< OSP call duration limit */
669 struct sip_request initreq; /*!< Initial request */
671 int maxtime; /*!< Max time for first response */
672 int initid; /*!< Auto-congest ID if appropriate */
673 int autokillid; /*!< Auto-kill ID */
674 time_t lastrtprx; /*!< Last RTP received */
675 time_t lastrtptx; /*!< Last RTP sent */
676 int rtptimeout; /*!< RTP timeout time */
677 int rtpholdtimeout; /*!< RTP timeout when on hold */
678 int rtpkeepalive; /*!< Send RTP packets for keepalive */
679 enum subscriptiontype subscribed; /*!< Is this call a subscription? */
681 int laststate; /*!< Last known extension state */
684 struct ast_dsp *vad; /*!< Voice Activation Detection dsp */
686 struct sip_peer *peerpoke; /*!< If this calls is to poke a peer, which one */
687 struct sip_registry *registry; /*!< If this is a REGISTER call, to which registry */
688 struct ast_rtp *rtp; /*!< RTP Session */
689 struct ast_rtp *vrtp; /*!< Video RTP session */
690 struct sip_pkt *packets; /*!< Packets scheduled for re-transmission */
691 struct sip_history *history; /*!< History of this SIP dialog */
692 struct ast_variable *chanvars; /*!< Channel variables to set for call */
693 struct sip_pvt *next; /*!< Next call in chain */
694 struct sip_invite_param *options; /*!< Options for INVITE */
697 #define FLAG_RESPONSE (1 << 0)
698 #define FLAG_FATAL (1 << 1)
700 /*! \brief sip packet - read in sipsock_read, transmitted in send_request */
702 struct sip_pkt *next; /*!< Next packet */
703 int retrans; /*!< Retransmission number */
704 int method; /*!< SIP method for this packet */
705 int seqno; /*!< Sequence number */
706 unsigned int flags; /*!< non-zero if this is a response packet (e.g. 200 OK) */
707 struct sip_pvt *owner; /*!< Owner call */
708 int retransid; /*!< Retransmission ID */
709 int timer_a; /*!< SIP timer A, retransmission timer */
710 int timer_t1; /*!< SIP Timer T1, estimated RTT or 500 ms */
711 int packetlen; /*!< Length of packet */
715 /*! \brief Structure for SIP user data. User's place calls to us */
717 /* Users who can access various contexts */
718 ASTOBJ_COMPONENTS(struct sip_user);
719 char secret[80]; /*!< Password */
720 char md5secret[80]; /*!< Password in md5 */
721 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
722 char subscribecontext[AST_MAX_CONTEXT]; /* Default context for subscriptions */
723 char cid_num[80]; /*!< Caller ID num */
724 char cid_name[80]; /*!< Caller ID name */
725 char accountcode[AST_MAX_ACCOUNT_CODE]; /* Account code */
726 char language[MAX_LANGUAGE]; /*!< Default language for this user */
727 char musicclass[MAX_MUSICCLASS];/*!< Music on Hold class */
728 char useragent[256]; /*!< User agent in SIP request */
729 struct ast_codec_pref prefs; /*!< codec prefs */
730 ast_group_t callgroup; /*!< Call group */
731 ast_group_t pickupgroup; /*!< Pickup Group */
732 unsigned int flags; /*!< SIP flags */
733 unsigned int sipoptions; /*!< Supported SIP options */
734 struct ast_flags flags_page2; /*!< SIP_PAGE2 flags */
735 int amaflags; /*!< AMA flags for billing */
736 int callingpres; /*!< Calling id presentation */
737 int capability; /*!< Codec capability */
738 int inUse; /*!< Number of calls in use */
739 int call_limit; /*!< Limit of concurrent calls */
740 struct ast_ha *ha; /*!< ACL setting */
741 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
744 /* Structure for SIP peer data, we place calls to peers if registered or fixed IP address (host) */
746 ASTOBJ_COMPONENTS(struct sip_peer); /*!< name, refcount, objflags, object pointers */
747 /*!< peer->name is the unique name of this object */
748 char secret[80]; /*!< Password */
749 char md5secret[80]; /*!< Password in MD5 */
750 struct sip_auth *auth; /*!< Realm authentication list */
751 char context[AST_MAX_CONTEXT]; /*!< Default context for incoming calls */
752 char subscribecontext[AST_MAX_CONTEXT]; /*!< Default context for subscriptions */
753 char username[80]; /*!< Temporary username until registration */
754 char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
755 int amaflags; /*!< AMA Flags (for billing) */
756 char tohost[MAXHOSTNAMELEN]; /*!< If not dynamic, IP address */
757 char regexten[AST_MAX_EXTENSION]; /*!< Extension to register (if regcontext is used) */
758 char fromuser[80]; /*!< From: user when calling this peer */
759 char fromdomain[MAXHOSTNAMELEN]; /*!< From: domain when calling this peer */
760 char fullcontact[256]; /*!< Contact registered with us (not in sip.conf) */
761 char cid_num[80]; /*!< Caller ID num */
762 char cid_name[80]; /*!< Caller ID name */
763 int callingpres; /*!< Calling id presentation */
764 int inUse; /*!< Number of calls in use */
765 int call_limit; /*!< Limit of concurrent calls */
766 char vmexten[AST_MAX_EXTENSION]; /*!< Dialplan extension for MWI notify message*/
767 char mailbox[AST_MAX_EXTENSION]; /*!< Mailbox setting for MWI checks */
768 char language[MAX_LANGUAGE]; /*!< Default language for prompts */
769 char musicclass[MAX_MUSICCLASS];/*!< Music on Hold class */
770 char useragent[256]; /*!< User agent in SIP request (saved from registration) */
771 struct ast_codec_pref prefs; /*!< codec prefs */
773 time_t lastmsgcheck; /*!< Last time we checked for MWI */
774 unsigned int flags; /*!< SIP flags */
775 unsigned int sipoptions; /*!< Supported SIP options */
776 struct ast_flags flags_page2; /*!< SIP_PAGE2 flags */
777 int expire; /*!< When to expire this peer registration */
778 int capability; /*!< Codec capability */
779 int rtptimeout; /*!< RTP timeout */
780 int rtpholdtimeout; /*!< RTP Hold Timeout */
781 int rtpkeepalive; /*!< Send RTP packets for keepalive */
782 ast_group_t callgroup; /*!< Call group */
783 ast_group_t pickupgroup; /*!< Pickup group */
784 struct ast_dnsmgr_entry *dnsmgr;/*!< DNS refresh manager for peer */
785 struct sockaddr_in addr; /*!< IP address of peer */
788 struct sip_pvt *call; /*!< Call pointer */
789 int pokeexpire; /*!< When to expire poke (qualify= checking) */
790 int lastms; /*!< How long last response took (in ms), or -1 for no response */
791 int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */
792 struct timeval ps; /*!< Ping send time */
794 struct sockaddr_in defaddr; /*!< Default IP address, used until registration */
795 struct ast_ha *ha; /*!< Access control list */
796 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
800 AST_MUTEX_DEFINE_STATIC(sip_reload_lock);
801 static int sip_reloading = 0;
803 /* States for outbound registrations (with register= lines in sip.conf */
804 #define REG_STATE_UNREGISTERED 0
805 #define REG_STATE_REGSENT 1
806 #define REG_STATE_AUTHSENT 2
807 #define REG_STATE_REGISTERED 3
808 #define REG_STATE_REJECTED 4
809 #define REG_STATE_TIMEOUT 5
810 #define REG_STATE_NOAUTH 6
811 #define REG_STATE_FAILED 7
814 /*! \brief sip_registry: Registrations with other SIP proxies */
815 struct sip_registry {
816 ASTOBJ_COMPONENTS_FULL(struct sip_registry,1,1);
817 int portno; /*!< Optional port override */
818 char username[80]; /*!< Who we are registering as */
819 char authuser[80]; /*!< Who we *authenticate* as */
820 char hostname[MAXHOSTNAMELEN]; /*!< Domain or host we register to */
821 char secret[80]; /*!< Password in clear text */
822 char md5secret[80]; /*!< Password in md5 */
823 char contact[256]; /*!< Contact extension */
825 int expire; /*!< Sched ID of expiration */
826 int regattempts; /*!< Number of attempts (since the last success) */
827 int timeout; /*!< sched id of sip_reg_timeout */
828 int refresh; /*!< How often to refresh */
829 struct sip_pvt *call; /*!< create a sip_pvt structure for each outbound "registration call" in progress */
830 int regstate; /*!< Registration state (see above) */
831 int callid_valid; /*!< 0 means we haven't chosen callid for this registry yet. */
832 char callid[80]; /*!< Global CallID for this registry */
833 unsigned int ocseq; /*!< Sequence number we got to for REGISTERs for this registry */
834 struct sockaddr_in us; /*!< Who the server thinks we are */
837 char realm[MAXHOSTNAMELEN]; /*!< Authorization realm */
838 char nonce[256]; /*!< Authorization nonce */
839 char domain[MAXHOSTNAMELEN]; /*!< Authorization domain */
840 char opaque[256]; /*!< Opaque nonsense */
841 char qop[80]; /*!< Quality of Protection. */
842 int noncecount; /*!< Nonce-count */
844 char lastmsg[256]; /*!< Last Message sent/received */
847 /*! \brief The user list: Users and friends ---*/
848 static struct ast_user_list {
849 ASTOBJ_CONTAINER_COMPONENTS(struct sip_user);
852 /*! \brief The peer list: Peers and Friends ---*/
853 static struct ast_peer_list {
854 ASTOBJ_CONTAINER_COMPONENTS(struct sip_peer);
857 /*! \brief The register list: Other SIP proxys we register with and call ---*/
858 static struct ast_register_list {
859 ASTOBJ_CONTAINER_COMPONENTS(struct sip_registry);
864 static int __sip_do_register(struct sip_registry *r);
866 static int sipsock = -1;
869 static struct sockaddr_in bindaddr = { 0, };
870 static struct sockaddr_in externip;
871 static char externhost[MAXHOSTNAMELEN] = "";
872 static time_t externexpire = 0;
873 static int externrefresh = 10;
874 static struct ast_ha *localaddr;
876 /* The list of manual NOTIFY types we know how to send */
877 struct ast_config *notify_types;
879 static struct sip_auth *authl; /*!< Authentication list */
882 static int transmit_response(struct sip_pvt *p, char *msg, struct sip_request *req);
883 static int transmit_response_with_sdp(struct sip_pvt *p, char *msg, struct sip_request *req, int retrans);
884 static int transmit_response_with_unsupported(struct sip_pvt *p, char *msg, struct sip_request *req, char *unsupported);
885 static int transmit_response_with_auth(struct sip_pvt *p, char *msg, struct sip_request *req, char *rand, int reliable, char *header, int stale);
886 static int transmit_request(struct sip_pvt *p, int sipmethod, int inc, int reliable, int newbranch);
887 static int transmit_request_with_auth(struct sip_pvt *p, int sipmethod, int inc, int reliable, int newbranch);
888 static int transmit_invite(struct sip_pvt *p, int sipmethod, int sendsdp, int init);
889 static int transmit_reinvite_with_sdp(struct sip_pvt *p);
890 static int transmit_info_with_digit(struct sip_pvt *p, char digit);
891 static int transmit_info_with_vidupdate(struct sip_pvt *p);
892 static int transmit_message_with_text(struct sip_pvt *p, const char *text);
893 static int transmit_refer(struct sip_pvt *p, const char *dest);
894 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
895 static struct sip_peer *temp_peer(const char *name);
896 static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, int sipmethod, int init);
897 static void free_old_route(struct sip_route *route);
898 static int build_reply_digest(struct sip_pvt *p, int method, char *digest, int digest_len);
899 static int update_call_counter(struct sip_pvt *fup, int event);
900 static struct sip_peer *build_peer(const char *name, struct ast_variable *v, int realtime);
901 static struct sip_user *build_user(const char *name, struct ast_variable *v, int realtime);
902 static int sip_do_reload(void);
903 static int expire_register(void *data);
904 static int callevents = 0;
906 static struct ast_channel *sip_request_call(const char *type, int format, void *data, int *cause);
907 static int sip_devicestate(void *data);
908 static int sip_sendtext(struct ast_channel *ast, const char *text);
909 static int sip_call(struct ast_channel *ast, char *dest, int timeout);
910 static int sip_hangup(struct ast_channel *ast);
911 static int sip_answer(struct ast_channel *ast);
912 static struct ast_frame *sip_read(struct ast_channel *ast);
913 static int sip_write(struct ast_channel *ast, struct ast_frame *frame);
914 static int sip_indicate(struct ast_channel *ast, int condition);
915 static int sip_transfer(struct ast_channel *ast, const char *dest);
916 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
917 static int sip_senddigit(struct ast_channel *ast, char digit);
918 static int clear_realm_authentication(struct sip_auth *authlist); /* Clear realm authentication list (at reload) */
919 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, char *configuration, int lineno); /* Add realm authentication in list */
920 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, char *realm); /* Find authentication for a specific realm */
921 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */
922 static void append_date(struct sip_request *req); /* Append date to SIP packet */
923 static int determine_firstline_parts(struct sip_request *req);
924 static void sip_dump_history(struct sip_pvt *dialog); /* Dump history to LOG_DEBUG at end of dialog, before destroying data */
925 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
926 static int transmit_state_notify(struct sip_pvt *p, int state, int full, int substate);
927 static char *gettag(struct sip_request *req, char *header, char *tagbuf, int tagbufsize);
928 int find_sip_method(char *msg);
929 unsigned int parse_sip_options(struct sip_pvt *pvt, char *supported);
931 /*! \brief Definition of this channel for PBX channel registration */
932 static const struct ast_channel_tech sip_tech = {
934 .description = "Session Initiation Protocol (SIP)",
935 .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
936 .properties = AST_CHAN_TP_WANTSJITTER,
937 .requester = sip_request_call,
938 .devicestate = sip_devicestate,
940 .hangup = sip_hangup,
941 .answer = sip_answer,
944 .write_video = sip_write,
945 .indicate = sip_indicate,
946 .transfer = sip_transfer,
948 .send_digit = sip_senddigit,
949 .bridge = ast_rtp_bridge,
950 .send_text = sip_sendtext,
954 \brief Thread-safe random number generator
955 \return a random number
957 This function uses a mutex lock to guarantee that no
958 two threads will receive the same random number.
960 static force_inline int thread_safe_rand(void)
964 ast_mutex_lock(&rand_lock);
966 ast_mutex_unlock(&rand_lock);
971 /*! \brief find_sip_method: Find SIP method from header
972 * Strictly speaking, SIP methods are case SENSITIVE, but we don't check
973 * following Jon Postel's rule: Be gentle in what you accept, strict with what you send */
974 int find_sip_method(char *msg)
978 if (ast_strlen_zero(msg))
981 for (i = 1; (i < (sizeof(sip_methods) / sizeof(sip_methods[0]))) && !res; i++) {
982 if (!strcasecmp(sip_methods[i].text, msg))
983 res = sip_methods[i].id;
988 /*! \brief parse_sip_options: Parse supported header in incoming packet */
989 unsigned int parse_sip_options(struct sip_pvt *pvt, char *supported)
993 char *temp = ast_strdupa(supported);
995 unsigned int profile = 0;
997 if (ast_strlen_zero(supported) )
1000 if (option_debug > 2 && sipdebug)
1001 ast_log(LOG_DEBUG, "Begin: parsing SIP \"Supported: %s\"\n", supported);
1006 if ( (sep = strchr(next, ',')) != NULL) {
1010 while (*next == ' ') /* Skip spaces */
1012 if (option_debug > 2 && sipdebug)
1013 ast_log(LOG_DEBUG, "Found SIP option: -%s-\n", next);
1014 for (i=0; (i < (sizeof(sip_options) / sizeof(sip_options[0]))) && !res; i++) {
1015 if (!strcasecmp(next, sip_options[i].text)) {
1016 profile |= sip_options[i].id;
1018 if (option_debug > 2 && sipdebug)
1019 ast_log(LOG_DEBUG, "Matched SIP option: %s\n", next);
1023 if (option_debug > 2 && sipdebug)
1024 ast_log(LOG_DEBUG, "Found no match for SIP option: %s (Please file bug report!)\n", next);
1028 pvt->sipoptions = profile;
1030 ast_log(LOG_DEBUG, "* SIP extension value: %d for call %s\n", profile, pvt->callid);
1035 /*! \brief sip_debug_test_addr: See if we pass debug IP filter */
1036 static inline int sip_debug_test_addr(struct sockaddr_in *addr)
1040 if (debugaddr.sin_addr.s_addr) {
1041 if (((ntohs(debugaddr.sin_port) != 0)
1042 && (debugaddr.sin_port != addr->sin_port))
1043 || (debugaddr.sin_addr.s_addr != addr->sin_addr.s_addr))
1049 /*! \brief sip_debug_test_pvt: Test PVT for debugging output */
1050 static inline int sip_debug_test_pvt(struct sip_pvt *p)
1054 return sip_debug_test_addr(((ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE) ? &p->recv : &p->sa));
1058 /*! \brief __sip_xmit: Transmit SIP message ---*/
1059 static int __sip_xmit(struct sip_pvt *p, char *data, int len)
1062 char iabuf[INET_ADDRSTRLEN];
1064 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE)
1065 res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->recv, sizeof(struct sockaddr_in));
1067 res=sendto(sipsock, data, len, 0, (struct sockaddr *)&p->sa, sizeof(struct sockaddr_in));
1070 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));
1075 static void sip_destroy(struct sip_pvt *p);
1077 /*! \brief build_via: Build a Via header for a request ---*/
1078 static void build_via(struct sip_pvt *p, char *buf, int len)
1080 char iabuf[INET_ADDRSTRLEN];
1082 /* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
1083 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_RFC3581)
1084 snprintf(buf, len, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", ast_inet_ntoa(iabuf, sizeof(iabuf), p->ourip), ourport, p->branch);
1085 else /* Work around buggy UNIDEN UIP200 firmware */
1086 snprintf(buf, len, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", ast_inet_ntoa(iabuf, sizeof(iabuf), p->ourip), ourport, p->branch);
1089 /*! \brief ast_sip_ouraddrfor: NAT fix - decide which IP address to use for ASterisk server? ---*/
1090 /* Only used for outbound registrations */
1091 static int ast_sip_ouraddrfor(struct in_addr *them, struct in_addr *us)
1094 * Using the localaddr structure built up with localnet statements
1095 * apply it to their address to see if we need to substitute our
1096 * externip or can get away with our internal bindaddr
1098 struct sockaddr_in theirs;
1099 theirs.sin_addr = *them;
1100 if (localaddr && externip.sin_addr.s_addr &&
1101 ast_apply_ha(localaddr, &theirs)) {
1102 char iabuf[INET_ADDRSTRLEN];
1103 if (externexpire && (time(NULL) >= externexpire)) {
1104 struct ast_hostent ahp;
1106 time(&externexpire);
1107 externexpire += externrefresh;
1108 if ((hp = ast_gethostbyname(externhost, &ahp))) {
1109 memcpy(&externip.sin_addr, hp->h_addr, sizeof(externip.sin_addr));
1111 ast_log(LOG_NOTICE, "Warning: Re-lookup of '%s' failed!\n", externhost);
1113 memcpy(us, &externip.sin_addr, sizeof(struct in_addr));
1114 ast_inet_ntoa(iabuf, sizeof(iabuf), *(struct in_addr *)&them->s_addr);
1115 ast_log(LOG_DEBUG, "Target address %s is not local, substituting externip\n", iabuf);
1117 else if (bindaddr.sin_addr.s_addr)
1118 memcpy(us, &bindaddr.sin_addr, sizeof(struct in_addr));
1120 return ast_ouraddrfor(them, us);
1124 /*! \brief append_history: Append to SIP dialog history */
1125 /* Always returns 0 */
1126 static int append_history(struct sip_pvt *p, const char *event, const char *data)
1128 struct sip_history *hist, *prev;
1131 if (!recordhistory || !p)
1133 if(!(hist = malloc(sizeof(struct sip_history)))) {
1134 ast_log(LOG_WARNING, "Can't allocate memory for history");
1137 memset(hist, 0, sizeof(struct sip_history));
1138 snprintf(hist->event, sizeof(hist->event), "%-15s %s", event, data);
1139 /* Trim up nicely */
1142 if ((*c == '\r') || (*c == '\n')) {
1148 /* Enqueue into history */
1160 /*! \brief retrans_pkt: Retransmit SIP message if no answer ---*/
1161 static int retrans_pkt(void *data)
1163 struct sip_pkt *pkt=data, *prev, *cur = NULL;
1164 char iabuf[INET_ADDRSTRLEN];
1165 int reschedule = DEFAULT_RETRANS;
1168 ast_mutex_lock(&pkt->owner->lock);
1170 if (pkt->retrans < MAX_RETRANS) {
1174 if (!pkt->timer_t1) { /* Re-schedule using timer_a and timer_t1 */
1175 if (sipdebug && option_debug > 3)
1176 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);
1180 if (sipdebug && option_debug > 3)
1181 ast_log(LOG_DEBUG, "SIP TIMER: Rescheduling retransmission #%d (%d) %s - %d\n", pkt->retransid, pkt->retrans, sip_methods[pkt->method].text, pkt->method);
1185 pkt->timer_a = 2 * pkt->timer_a;
1187 /* For non-invites, a maximum of 4 secs */
1188 siptimer_a = pkt->timer_t1 * pkt->timer_a; /* Double each time */
1189 if (pkt->method != SIP_INVITE && siptimer_a > 4000)
1192 /* Reschedule re-transmit */
1193 reschedule = siptimer_a;
1194 if (option_debug > 3)
1195 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);
1198 if (pkt->owner && sip_debug_test_pvt(pkt->owner)) {
1199 if (ast_test_flag(pkt->owner, SIP_NAT) & SIP_NAT_ROUTE)
1200 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);
1202 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);
1204 snprintf(buf, sizeof(buf), "ReTx %d", reschedule);
1206 append_history(pkt->owner, buf, pkt->data);
1207 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen);
1208 ast_mutex_unlock(&pkt->owner->lock);
1211 /* Too many retries */
1212 if (pkt->owner && pkt->method != SIP_OPTIONS) {
1213 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 {
1214 if ((pkt->method == SIP_OPTIONS) && sipdebug)
1215 ast_log(LOG_WARNING, "Cancelling retransmit of OPTIONs (call id %s) \n", pkt->owner->callid);
1217 append_history(pkt->owner, "MaxRetries", (ast_test_flag(pkt, FLAG_FATAL)) ? "(Critical)" : "(Non-critical)");
1219 pkt->retransid = -1;
1221 if (ast_test_flag(pkt, FLAG_FATAL)) {
1222 while(pkt->owner->owner && ast_mutex_trylock(&pkt->owner->owner->lock)) {
1223 ast_mutex_unlock(&pkt->owner->lock);
1225 ast_mutex_lock(&pkt->owner->lock);
1227 if (pkt->owner->owner) {
1228 ast_set_flag(pkt->owner, SIP_ALREADYGONE);
1229 ast_log(LOG_WARNING, "Hanging up call %s - no reply to our critical packet.\n", pkt->owner->callid);
1230 ast_queue_hangup(pkt->owner->owner);
1231 ast_mutex_unlock(&pkt->owner->owner->lock);
1233 /* If no channel owner, destroy now */
1234 ast_set_flag(pkt->owner, SIP_NEEDDESTROY);
1237 /* In any case, go ahead and remove the packet */
1239 cur = pkt->owner->packets;
1248 prev->next = cur->next;
1250 pkt->owner->packets = cur->next;
1251 ast_mutex_unlock(&pkt->owner->lock);
1255 ast_log(LOG_WARNING, "Weird, couldn't find packet owner!\n");
1257 ast_mutex_unlock(&pkt->owner->lock);
1261 /*! \brief __sip_reliable_xmit: transmit packet with retransmits ---*/
1262 static int __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, char *data, int len, int fatal, int sipmethod)
1264 struct sip_pkt *pkt;
1265 int siptimer_a = DEFAULT_RETRANS;
1267 pkt = malloc(sizeof(struct sip_pkt) + len + 1);
1270 memset(pkt, 0, sizeof(struct sip_pkt));
1271 memcpy(pkt->data, data, len);
1272 pkt->method = sipmethod;
1273 pkt->packetlen = len;
1274 pkt->next = p->packets;
1278 pkt->data[len] = '\0';
1279 pkt->timer_t1 = p->timer_t1; /* Set SIP timer T1 */
1281 ast_set_flag(pkt, FLAG_FATAL);
1283 siptimer_a = pkt->timer_t1 * 2;
1285 /* Schedule retransmission */
1286 pkt->retransid = ast_sched_add_variable(sched, siptimer_a, retrans_pkt, pkt, 1);
1287 if (option_debug > 3 && sipdebug)
1288 ast_log(LOG_DEBUG, "*** SIP TIMER: Initalizing retransmit timer on packet: Id #%d\n", pkt->retransid);
1289 pkt->next = p->packets;
1292 __sip_xmit(pkt->owner, pkt->data, pkt->packetlen); /* Send packet */
1293 if (sipmethod == SIP_INVITE) {
1294 /* Note this is a pending invite */
1295 p->pendinginvite = seqno;
1300 /*! \brief __sip_autodestruct: Kill a call (called by scheduler) ---*/
1301 static int __sip_autodestruct(void *data)
1303 struct sip_pvt *p = data;
1307 /* If this is a subscription, tell the phone that we got a timeout */
1308 if (p->subscribed) {
1309 p->subscribed = TIMEOUT;
1310 transmit_state_notify(p, AST_EXTENSION_DEACTIVATED, 1, 1); /* Send first notification */
1311 p->subscribed = NONE;
1312 append_history(p, "Subscribestatus", "timeout");
1313 return 10000; /* Reschedule this destruction so that we know that it's gone */
1315 ast_log(LOG_DEBUG, "Auto destroying call '%s'\n", p->callid);
1316 append_history(p, "AutoDestroy", "");
1318 ast_log(LOG_WARNING, "Autodestruct on call '%s' with owner in place\n", p->callid);
1319 ast_queue_hangup(p->owner);
1326 /*! \brief sip_scheddestroy: Schedule destruction of SIP call ---*/
1327 static int sip_scheddestroy(struct sip_pvt *p, int ms)
1330 if (sip_debug_test_pvt(p))
1331 ast_verbose("Scheduling destruction of call '%s' in %d ms\n", p->callid, ms);
1332 if (recordhistory) {
1333 snprintf(tmp, sizeof(tmp), "%d ms", ms);
1334 append_history(p, "SchedDestroy", tmp);
1337 if (p->autokillid > -1)
1338 ast_sched_del(sched, p->autokillid);
1339 p->autokillid = ast_sched_add(sched, ms, __sip_autodestruct, p);
1343 /*! \brief sip_cancel_destroy: Cancel destruction of SIP call ---*/
1344 static int sip_cancel_destroy(struct sip_pvt *p)
1346 if (p->autokillid > -1)
1347 ast_sched_del(sched, p->autokillid);
1348 append_history(p, "CancelDestroy", "");
1353 /*! \brief __sip_ack: Acknowledges receipt of a packet and stops retransmission ---*/
1354 static int __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
1356 struct sip_pkt *cur, *prev = NULL;
1358 int resetinvite = 0;
1359 /* Just in case... */
1362 msg = sip_methods[sipmethod].text;
1366 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1367 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1368 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1369 ast_mutex_lock(&p->lock);
1370 if (!resp && (seqno == p->pendinginvite)) {
1371 ast_log(LOG_DEBUG, "Acked pending invite %d\n", p->pendinginvite);
1372 p->pendinginvite = 0;
1375 /* this is our baby */
1377 prev->next = cur->next;
1379 p->packets = cur->next;
1380 if (cur->retransid > -1) {
1381 if (sipdebug && option_debug > 3)
1382 ast_log(LOG_DEBUG, "** SIP TIMER: Cancelling retransmit of packet (reply received) Retransid #%d\n", cur->retransid);
1383 ast_sched_del(sched, cur->retransid);
1386 ast_mutex_unlock(&p->lock);
1393 ast_log(LOG_DEBUG, "Stopping retransmission on '%s' of %s %d: Match %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
1397 /* Pretend to ack all packets */
1398 static int __sip_pretend_ack(struct sip_pvt *p)
1400 struct sip_pkt *cur=NULL;
1403 if (cur == p->packets) {
1404 ast_log(LOG_WARNING, "Have a packet that doesn't want to give up! %s\n", sip_methods[cur->method].text);
1409 __sip_ack(p, p->packets->seqno, (ast_test_flag(p->packets, FLAG_RESPONSE)), cur->method);
1410 else { /* Unknown packet type */
1413 ast_copy_string(method, p->packets->data, sizeof(method));
1414 c = ast_skip_blanks(method); /* XXX what ? */
1416 __sip_ack(p, p->packets->seqno, (ast_test_flag(p->packets, FLAG_RESPONSE)), find_sip_method(method));
1422 /*! \brief __sip_semi_ack: Acks receipt of packet, keep it around (used for provisional responses) ---*/
1423 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
1425 struct sip_pkt *cur;
1427 char *msg = sip_methods[sipmethod].text;
1431 if ((cur->seqno == seqno) && ((ast_test_flag(cur, FLAG_RESPONSE)) == resp) &&
1432 ((ast_test_flag(cur, FLAG_RESPONSE)) ||
1433 (!strncasecmp(msg, cur->data, strlen(msg)) && (cur->data[strlen(msg)] < 33)))) {
1434 /* this is our baby */
1435 if (cur->retransid > -1) {
1436 if (option_debug > 3 && sipdebug)
1437 ast_log(LOG_DEBUG, "*** SIP TIMER: Cancelling retransmission #%d - %s (got response)\n", cur->retransid, msg);
1438 ast_sched_del(sched, cur->retransid);
1440 cur->retransid = -1;
1446 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");
1450 static void parse_request(struct sip_request *req);
1451 static char *get_header(struct sip_request *req, char *name);
1452 static void copy_request(struct sip_request *dst,struct sip_request *src);
1454 /*! \brief parse_copy: Copy SIP request, parse it */
1455 static void parse_copy(struct sip_request *dst, struct sip_request *src)
1457 memset(dst, 0, sizeof(*dst));
1458 memcpy(dst->data, src->data, sizeof(dst->data));
1459 dst->len = src->len;
1463 /*! \brief send_response: Transmit response on SIP request---*/
1464 static int send_response(struct sip_pvt *p, struct sip_request *req, int reliable, int seqno)
1467 char iabuf[INET_ADDRSTRLEN];
1468 struct sip_request tmp;
1471 if (sip_debug_test_pvt(p)) {
1472 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE)
1473 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);
1475 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);
1478 if (recordhistory) {
1479 parse_copy(&tmp, req);
1480 snprintf(tmpmsg, sizeof(tmpmsg), "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1481 append_history(p, "TxRespRel", tmpmsg);
1483 res = __sip_reliable_xmit(p, seqno, 1, req->data, req->len, (reliable > 1), req->method);
1485 if (recordhistory) {
1486 parse_copy(&tmp, req);
1487 snprintf(tmpmsg, sizeof(tmpmsg), "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1488 append_history(p, "TxResp", tmpmsg);
1490 res = __sip_xmit(p, req->data, req->len);
1497 /*! \brief send_request: Send SIP Request to the other part of the dialogue ---*/
1498 static int send_request(struct sip_pvt *p, struct sip_request *req, int reliable, int seqno)
1501 char iabuf[INET_ADDRSTRLEN];
1502 struct sip_request tmp;
1505 if (sip_debug_test_pvt(p)) {
1506 if (ast_test_flag(p, SIP_NAT) & SIP_NAT_ROUTE)
1507 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);
1509 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);
1512 if (recordhistory) {
1513 parse_copy(&tmp, req);
1514 snprintf(tmpmsg, sizeof(tmpmsg), "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1515 append_history(p, "TxReqRel", tmpmsg);
1517 res = __sip_reliable_xmit(p, seqno, 0, req->data, req->len, (reliable > 1), req->method);
1519 if (recordhistory) {
1520 parse_copy(&tmp, req);
1521 snprintf(tmpmsg, sizeof(tmpmsg), "%s / %s", tmp.data, get_header(&tmp, "CSeq"));
1522 append_history(p, "TxReq", tmpmsg);
1524 res = __sip_xmit(p, req->data, req->len);
1529 /*! \brief get_in_brackets: Pick out text in brackets from character string ---*/
1530 /* returns pointer to terminated stripped string. modifies input string. */
1531 static char *get_in_brackets(char *tmp)
1535 char *first_bracket;
1536 char *second_bracket;
1541 first_quote = strchr(parse, '"');
1542 first_bracket = strchr(parse, '<');
1543 if (first_quote && first_bracket && (first_quote < first_bracket)) {
1545 for (parse = first_quote + 1; *parse; parse++) {
1546 if ((*parse == '"') && (last_char != '\\'))
1551 ast_log(LOG_WARNING, "No closing quote found in '%s'\n", tmp);
1557 if (first_bracket) {
1558 second_bracket = strchr(first_bracket + 1, '>');
1559 if (second_bracket) {
1560 *second_bracket = '\0';
1561 return first_bracket + 1;
1563 ast_log(LOG_WARNING, "No closing bracket found in '%s'\n", tmp);
1571 /*! \brief sip_sendtext: Send SIP MESSAGE text within a call ---*/
1572 /* Called from PBX core text message functions */
1573 static int sip_sendtext(struct ast_channel *ast, const char *text)
1575 struct sip_pvt *p = ast->tech_pvt;
1576 int debug=sip_debug_test_pvt(p);
1579 ast_verbose("Sending text %s on %s\n", text, ast->name);
1582 if (ast_strlen_zero(text))
1585 ast_verbose("Really sending text %s on %s\n", text, ast->name);
1586 transmit_message_with_text(p, text);
1590 /*! \brief realtime_update_peer: Update peer object in realtime storage ---*/
1591 static void realtime_update_peer(const char *peername, struct sockaddr_in *sin, const char *username, const char *fullcontact, int expirey)
1595 char regseconds[20] = "0";
1597 if (expirey) { /* Registration */
1601 snprintf(regseconds, sizeof(regseconds), "%ld", nowtime); /* Expiration time */
1602 ast_inet_ntoa(ipaddr, sizeof(ipaddr), sin->sin_addr);
1603 snprintf(port, sizeof(port), "%d", ntohs(sin->sin_port));
1606 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, "username", username, "fullcontact", fullcontact, NULL);
1608 ast_update_realtime("sippeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, "username", username, NULL);
1611 /*! \brief register_peer_exten: Automatically add peer extension to dial plan ---*/
1612 static void register_peer_exten(struct sip_peer *peer, int onoff)
1615 char *stringp, *ext;
1616 if (!ast_strlen_zero(regcontext)) {
1617 ast_copy_string(multi, ast_strlen_zero(peer->regexten) ? peer->name : peer->regexten, sizeof(multi));
1619 while((ext = strsep(&stringp, "&"))) {
1621 ast_add_extension(regcontext, 1, ext, 1, NULL, NULL, "Noop", strdup(peer->name), free, channeltype);
1623 ast_context_remove_extension(regcontext, ext, 1, NULL);
1628 /*! \brief sip_destroy_peer: Destroy peer object from memory */
1629 static void sip_destroy_peer(struct sip_peer *peer)
1631 /* Delete it, it needs to disappear */
1633 sip_destroy(peer->call);
1634 if (peer->chanvars) {
1635 ast_variables_destroy(peer->chanvars);
1636 peer->chanvars = NULL;
1638 if (peer->expire > -1)
1639 ast_sched_del(sched, peer->expire);
1640 if (peer->pokeexpire > -1)
1641 ast_sched_del(sched, peer->pokeexpire);
1642 register_peer_exten(peer, 0);
1643 ast_free_ha(peer->ha);
1644 if (ast_test_flag(peer, SIP_SELFDESTRUCT))
1646 else if (ast_test_flag(peer, SIP_REALTIME))
1650 clear_realm_authentication(peer->auth);
1651 peer->auth = (struct sip_auth *) NULL;
1653 ast_dnsmgr_release(peer->dnsmgr);
1657 /*! \brief update_peer: Update peer data in database (if used) ---*/
1658 static void update_peer(struct sip_peer *p, int expiry)
1660 int rtcachefriends = ast_test_flag(&(p->flags_page2), SIP_PAGE2_RTCACHEFRIENDS);
1661 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTUPDATE) &&
1662 (ast_test_flag(p, SIP_REALTIME) || rtcachefriends)) {
1663 realtime_update_peer(p->name, &p->addr, p->username, rtcachefriends ? p->fullcontact : NULL, expiry);
1668 /*! \brief realtime_peer: Get peer from realtime storage
1669 * Checks the "sippeers" realtime family from extconfig.conf */
1670 static struct sip_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
1672 struct sip_peer *peer=NULL;
1673 struct ast_variable *var;
1674 struct ast_variable *tmp;
1675 char *newpeername = (char *) peername;
1678 /* First check on peer name */
1680 var = ast_load_realtime("sippeers", "name", peername, NULL);
1681 else if (sin) { /* Then check on IP address */
1682 ast_inet_ntoa(iabuf, sizeof(iabuf), sin->sin_addr);
1683 var = ast_load_realtime("sippeers", "ipaddr", iabuf, NULL);
1691 /* If this is type=user, then skip this object. */
1693 if (!strcasecmp(tmp->name, "type") &&
1694 !strcasecmp(tmp->value, "user")) {
1695 ast_variables_destroy(var);
1697 } else if (!newpeername && !strcasecmp(tmp->name, "name")) {
1698 newpeername = tmp->value;
1703 if (!newpeername) { /* Did not find peer in realtime */
1704 ast_log(LOG_WARNING, "Cannot Determine peer name ip=%s\n", iabuf);
1705 ast_variables_destroy(var);
1706 return (struct sip_peer *) NULL;
1709 /* Peer found in realtime, now build it in memory */
1710 peer = build_peer(newpeername, var, !ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS));
1712 ast_variables_destroy(var);
1713 return (struct sip_peer *) NULL;
1716 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS)) {
1718 ast_copy_flags((&peer->flags_page2),(&global_flags_page2), SIP_PAGE2_RTAUTOCLEAR|SIP_PAGE2_RTCACHEFRIENDS);
1719 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTAUTOCLEAR)) {
1720 if (peer->expire > -1) {
1721 ast_sched_del(sched, peer->expire);
1723 peer->expire = ast_sched_add(sched, (global_rtautoclear) * 1000, expire_register, (void *)peer);
1725 ASTOBJ_CONTAINER_LINK(&peerl,peer);
1727 ast_set_flag(peer, SIP_REALTIME);
1729 ast_variables_destroy(var);
1734 /*! \brief sip_addrcmp: Support routine for find_peer ---*/
1735 static int sip_addrcmp(char *name, struct sockaddr_in *sin)
1737 /* We know name is the first field, so we can cast */
1738 struct sip_peer *p = (struct sip_peer *)name;
1739 return !(!inaddrcmp(&p->addr, sin) ||
1740 (ast_test_flag(p, SIP_INSECURE_PORT) &&
1741 (p->addr.sin_addr.s_addr == sin->sin_addr.s_addr)));
1744 /*! \brief find_peer: Locate peer by name or ip address
1745 * This is used on incoming SIP message to find matching peer on ip
1746 or outgoing message to find matching peer on name */
1747 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
1749 struct sip_peer *p = NULL;
1752 p = ASTOBJ_CONTAINER_FIND(&peerl,peer);
1754 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl,sin,name,sip_addr_hashfunc,1,sip_addrcmp);
1756 if (!p && realtime) {
1757 p = realtime_peer(peer, sin);
1763 /*! \brief sip_destroy_user: Remove user object from in-memory storage ---*/
1764 static void sip_destroy_user(struct sip_user *user)
1766 ast_free_ha(user->ha);
1767 if (user->chanvars) {
1768 ast_variables_destroy(user->chanvars);
1769 user->chanvars = NULL;
1771 if (ast_test_flag(user, SIP_REALTIME))
1778 /*! \brief realtime_user: Load user from realtime storage
1779 * Loads user from "sipusers" category in realtime (extconfig.conf)
1780 * Users are matched on From: user name (the domain in skipped) */
1781 static struct sip_user *realtime_user(const char *username)
1783 struct ast_variable *var;
1784 struct ast_variable *tmp;
1785 struct sip_user *user = NULL;
1787 var = ast_load_realtime("sipusers", "name", username, NULL);
1794 if (!strcasecmp(tmp->name, "type") &&
1795 !strcasecmp(tmp->value, "peer")) {
1796 ast_variables_destroy(var);
1804 user = build_user(username, var, !ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS));
1806 if (!user) { /* No user found */
1807 ast_variables_destroy(var);
1811 if (ast_test_flag((&global_flags_page2), SIP_PAGE2_RTCACHEFRIENDS)) {
1812 ast_set_flag((&user->flags_page2), SIP_PAGE2_RTCACHEFRIENDS);
1814 ASTOBJ_CONTAINER_LINK(&userl,user);
1816 /* Move counter from s to r... */
1819 ast_set_flag(user, SIP_REALTIME);
1821 ast_variables_destroy(var);
1825 /*! \brief find_user: Locate user by name
1826 * Locates user by name (From: sip uri user name part) first
1827 * from in-memory list (static configuration) then from
1828 * realtime storage (defined in extconfig.conf) */
1829 static struct sip_user *find_user(const char *name, int realtime)
1831 struct sip_user *u = NULL;
1832 u = ASTOBJ_CONTAINER_FIND(&userl,name);
1833 if (!u && realtime) {
1834 u = realtime_user(name);
1839 /*! \brief create_addr_from_peer: create address structure from peer reference ---*/
1840 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer)
1844 if ((peer->addr.sin_addr.s_addr || peer->defaddr.sin_addr.s_addr) &&
1845 (!peer->maxms || ((peer->lastms >= 0) && (peer->lastms <= peer->maxms)))) {
1846 if (peer->addr.sin_addr.s_addr) {
1847 r->sa.sin_family = peer->addr.sin_family;
1848 r->sa.sin_addr = peer->addr.sin_addr;
1849 r->sa.sin_port = peer->addr.sin_port;
1851 r->sa.sin_family = peer->defaddr.sin_family;
1852 r->sa.sin_addr = peer->defaddr.sin_addr;
1853 r->sa.sin_port = peer->defaddr.sin_port;
1855 memcpy(&r->recv, &r->sa, sizeof(r->recv));
1860 ast_copy_flags(r, peer, SIP_FLAGS_TO_COPY);
1861 r->capability = peer->capability;
1862 r->prefs = peer->prefs;
1864 ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1865 ast_rtp_setnat(r->rtp, (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1868 ast_log(LOG_DEBUG, "Setting NAT on VRTP to %d\n", (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1869 ast_rtp_setnat(r->vrtp, (ast_test_flag(r, SIP_NAT) & SIP_NAT_ROUTE));
1871 ast_copy_string(r->peername, peer->username, sizeof(r->peername));
1872 ast_copy_string(r->authname, peer->username, sizeof(r->authname));
1873 ast_copy_string(r->username, peer->username, sizeof(r->username));
1874 ast_copy_string(r->peersecret, peer->secret, sizeof(r->peersecret));
1875 ast_copy_string(r->peermd5secret, peer->md5secret, sizeof(r->peermd5secret));
1876 ast_copy_string(r->tohost, peer->tohost, sizeof(r->tohost));
1877 ast_copy_string(r->fullcontact, peer->fullcontact, sizeof(r->fullcontact));
1878 if (!r->initreq.headers && !ast_strlen_zero(peer->fromdomain)) {
1879 if ((callhost = strchr(r->callid, '@'))) {
1880 strncpy(callhost + 1, peer->fromdomain, sizeof(r->callid) - (callhost - r->callid) - 2);
1883 if (ast_strlen_zero(r->tohost)) {
1884 if (peer->addr.sin_addr.s_addr)
1885 ast_inet_ntoa(r->tohost, sizeof(r->tohost), peer->addr.sin_addr);
1887 ast_inet_ntoa(r->tohost, sizeof(r->tohost), peer->defaddr.sin_addr);
1889 if (!ast_strlen_zero(peer->fromdomain))
1890 ast_copy_string(r->fromdomain, peer->fromdomain, sizeof(r->fromdomain));
1891 if (!ast_strlen_zero(peer->fromuser))
1892 ast_copy_string(r->fromuser, peer->fromuser, sizeof(r->fromuser));
1893 r->maxtime = peer->maxms;
1894 r->callgroup = peer->callgroup;
1895 r->pickupgroup = peer->pickupgroup;
1896 /* Set timer T1 to RTT for this peer (if known by qualify=) */
1897 if (peer->maxms && peer->lastms)
1898 r->timer_t1 = peer->lastms;
1899 if ((ast_test_flag(r, SIP_DTMF) == SIP_DTMF_RFC2833) || (ast_test_flag(r, SIP_DTMF) == SIP_DTMF_AUTO))
1900 r->noncodeccapability |= AST_RTP_DTMF;
1902 r->noncodeccapability &= ~AST_RTP_DTMF;
1903 ast_copy_string(r->context, peer->context,sizeof(r->context));
1904 r->rtptimeout = peer->rtptimeout;
1905 r->rtpholdtimeout = peer->rtpholdtimeout;
1906 r->rtpkeepalive = peer->rtpkeepalive;
1907 if (peer->call_limit)
1908 ast_set_flag(r, SIP_CALL_LIMIT);
1913 /*! \brief create_addr: create address structure from peer name
1914 * Or, if peer not found, find it in the global DNS
1915 * returns TRUE (-1) on failure, FALSE on success */
1916 static int create_addr(struct sip_pvt *dialog, char *opeer)
1919 struct ast_hostent ahp;
1924 char host[MAXHOSTNAMELEN], *hostn;
1927 ast_copy_string(peer, opeer, sizeof(peer));
1928 port = strchr(peer, ':');
1933 dialog->sa.sin_family = AF_INET;
1934 dialog->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
1935 p = find_peer(peer, NULL, 1);
1939 if (create_addr_from_peer(dialog, p))
1940 ASTOBJ_UNREF(p, sip_destroy_peer);
1948 portno = atoi(port);
1950 portno = DEFAULT_SIP_PORT;
1952 char service[MAXHOSTNAMELEN];
1955 snprintf(service, sizeof(service), "_sip._udp.%s", peer);
1956 ret = ast_get_srv(NULL, host, sizeof(host), &tportno, service);
1962 hp = ast_gethostbyname(hostn, &ahp);
1964 ast_copy_string(dialog->tohost, peer, sizeof(dialog->tohost));
1965 memcpy(&dialog->sa.sin_addr, hp->h_addr, sizeof(dialog->sa.sin_addr));
1966 dialog->sa.sin_port = htons(portno);
1967 memcpy(&dialog->recv, &dialog->sa, sizeof(dialog->recv));
1970 ast_log(LOG_WARNING, "No such host: %s\n", peer);
1974 ASTOBJ_UNREF(p, sip_destroy_peer);
1979 /*! \brief auto_congest: Scheduled congestion on a call ---*/
1980 static int auto_congest(void *nothing)
1982 struct sip_pvt *p = nothing;
1983 ast_mutex_lock(&p->lock);
1986 if (!ast_mutex_trylock(&p->owner->lock)) {
1987 ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
1988 ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
1989 ast_mutex_unlock(&p->owner->lock);
1992 ast_mutex_unlock(&p->lock);
1999 /*! \brief sip_call: Initiate SIP call from PBX
2000 * used from the dial() application */
2001 static int sip_call(struct ast_channel *ast, char *dest, int timeout)
2006 char *osphandle = NULL;
2008 struct varshead *headp;
2009 struct ast_var_t *current;
2014 if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
2015 ast_log(LOG_WARNING, "sip_call called on %s, neither down nor reserved\n", ast->name);
2020 /* Check whether there is vxml_url, distinctive ring variables */
2022 headp=&ast->varshead;
2023 AST_LIST_TRAVERSE(headp,current,entries) {
2024 /* Check whether there is a VXML_URL variable */
2025 if (!p->options->vxml_url && !strcasecmp(ast_var_name(current), "VXML_URL")) {
2026 p->options->vxml_url = ast_var_value(current);
2027 } else if (!p->options->uri_options && !strcasecmp(ast_var_name(current), "SIP_URI_OPTIONS")) {
2028 p->options->uri_options = ast_var_value(current);
2029 } else if (!p->options->distinctive_ring && !strcasecmp(ast_var_name(current), "ALERT_INFO")) {
2030 /* Check whether there is a ALERT_INFO variable */
2031 p->options->distinctive_ring = ast_var_value(current);
2032 } else if (!p->options->addsipheaders && !strncasecmp(ast_var_name(current), "SIPADDHEADER", strlen("SIPADDHEADER"))) {
2033 /* Check whether there is a variable with a name starting with SIPADDHEADER */
2034 p->options->addsipheaders = 1;
2039 else if (!p->options->osptoken && !strcasecmp(ast_var_name(current), "OSPTOKEN")) {
2040 p->options->osptoken = ast_var_value(current);
2041 } else if (!osphandle && !strcasecmp(ast_var_name(current), "OSPHANDLE")) {
2042 osphandle = ast_var_value(current);
2048 ast_set_flag(p, SIP_OUTGOING);
2050 if (!p->options->osptoken || !osphandle || (sscanf(osphandle, "%d", &p->osphandle) != 1)) {
2051 /* Force Disable OSP support */
2052 ast_log(LOG_DEBUG, "Disabling OSP support for this call. osptoken = %s, osphandle = %s\n", p->options->osptoken, osphandle);
2053 p->options->osptoken = NULL;
2058 ast_log(LOG_DEBUG, "Outgoing Call for %s\n", p->username);
2059 res = update_call_counter(p, INC_CALL_LIMIT);
2061 p->callingpres = ast->cid.cid_pres;
2062 p->jointcapability = p->capability;
2063 transmit_invite(p, SIP_INVITE, 1, 2);
2065 /* Initialize auto-congest time */
2066 p->initid = ast_sched_add(sched, p->maxtime * 4, auto_congest, p);
2072 /*! \brief sip_registry_destroy: Destroy registry object ---*/
2073 /* Objects created with the register= statement in static configuration */
2074 static void sip_registry_destroy(struct sip_registry *reg)
2078 /* Clear registry before destroying to ensure
2079 we don't get reentered trying to grab the registry lock */
2080 reg->call->registry = NULL;
2081 sip_destroy(reg->call);
2083 if (reg->expire > -1)
2084 ast_sched_del(sched, reg->expire);
2085 if (reg->timeout > -1)
2086 ast_sched_del(sched, reg->timeout);
2092 /*! \brief __sip_destroy: Execute destrucion of call structure, release memory---*/
2093 static void __sip_destroy(struct sip_pvt *p, int lockowner)
2095 struct sip_pvt *cur, *prev = NULL;
2097 struct sip_history *hist;
2099 if (sip_debug_test_pvt(p))
2100 ast_verbose("Destroying call '%s'\n", p->callid);
2103 sip_dump_history(p);
2108 if (p->stateid > -1)
2109 ast_extension_state_del(p->stateid, NULL);
2111 ast_sched_del(sched, p->initid);
2112 if (p->autokillid > -1)
2113 ast_sched_del(sched, p->autokillid);
2116 ast_rtp_destroy(p->rtp);
2119 ast_rtp_destroy(p->vrtp);
2122 free_old_route(p->route);
2126 if (p->registry->call == p)
2127 p->registry->call = NULL;
2128 ASTOBJ_UNREF(p->registry,sip_registry_destroy);
2137 /* Unlink us from the owner if we have one */
2140 ast_mutex_lock(&p->owner->lock);
2141 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
2142 p->owner->tech_pvt = NULL;
2144 ast_mutex_unlock(&p->owner->lock);
2149 p->history = p->history->next;
2157 prev->next = cur->next;
2166 ast_log(LOG_WARNING, "Trying to destroy \"%s\", not found in dialog list?!?! \n", p->callid);
2170 ast_sched_del(sched, p->initid);
2172 while((cp = p->packets)) {
2173 p->packets = p->packets->next;
2174 if (cp->retransid > -1) {
2175 ast_sched_del(sched, cp->retransid);
2180 ast_variables_destroy(p->chanvars);
2183 ast_mutex_destroy(&p->lock);
2187 /*! \brief update_call_counter: Handle call_limit for SIP users
2188 * Note: This is going to be replaced by app_groupcount
2189 * Thought: For realtime, we should propably update storage with inuse counter... */
2190 static int update_call_counter(struct sip_pvt *fup, int event)
2193 int *inuse, *call_limit;
2194 int outgoing = ast_test_flag(fup, SIP_OUTGOING);
2195 struct sip_user *u = NULL;
2196 struct sip_peer *p = NULL;
2198 if (option_debug > 2)
2199 ast_log(LOG_DEBUG, "Updating call counter for %s call\n", outgoing ? "outgoing" : "incoming");
2200 /* Test if we need to check call limits, in order to avoid
2201 realtime lookups if we do not need it */
2202 if (!ast_test_flag(fup, SIP_CALL_LIMIT))
2205 ast_copy_string(name, fup->username, sizeof(name));
2207 /* Check the list of users */
2208 u = find_user(name, 1);
2211 call_limit = &u->call_limit;
2214 /* Try to find peer */
2216 p = find_peer(fup->peername, NULL, 1);
2219 call_limit = &p->call_limit;
2220 ast_copy_string(name, fup->peername, sizeof(name));
2222 if (option_debug > 1)
2223 ast_log(LOG_DEBUG, "%s is not a local user, no call limit\n", name);
2228 /* incoming and outgoing affects the inUse counter */
2229 case DEC_CALL_LIMIT:
2235 if (option_debug > 1 || sipdebug) {
2236 ast_log(LOG_DEBUG, "Call %s %s '%s' removed from call limit %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *call_limit);
2239 case INC_CALL_LIMIT:
2240 if (*call_limit > 0 ) {
2241 if (*inuse >= *call_limit) {
2242 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);
2244 ASTOBJ_UNREF(u,sip_destroy_user);
2246 ASTOBJ_UNREF(p,sip_destroy_peer);
2251 if (option_debug > 1 || sipdebug) {
2252 ast_log(LOG_DEBUG, "Call %s %s '%s' is %d out of %d\n", outgoing ? "to" : "from", u ? "user":"peer", name, *inuse, *call_limit);
2256 ast_log(LOG_ERROR, "update_call_counter(%s, %d) called with no event!\n", name, event);
2259 ASTOBJ_UNREF(u,sip_destroy_user);
2261 ASTOBJ_UNREF(p,sip_destroy_peer);
2265 /*! \brief sip_destroy: Destroy SIP call structure ---*/
2266 static void sip_destroy(struct sip_pvt *p)
2268 ast_mutex_lock(&iflock);
2269 __sip_destroy(p, 1);
2270 ast_mutex_unlock(&iflock);
2274 static int transmit_response_reliable(struct sip_pvt *p, char *msg, struct sip_request *req, int fatal);
2276 /*! \brief hangup_sip2cause: Convert SIP hangup causes to Asterisk hangup causes ---*/
2277 static int hangup_sip2cause(int cause)
2279 /* Possible values taken from causes.h */
2282 case 603: /* Declined */
2283 case 403: /* Not found */
2284 return AST_CAUSE_CALL_REJECTED;
2285 case 404: /* Not found */
2286 return AST_CAUSE_UNALLOCATED;
2287 case 408: /* No reaction */
2288 return AST_CAUSE_NO_USER_RESPONSE;
2289 case 480: /* No answer */
2290 return AST_CAUSE_FAILURE;
2291 case 483: /* Too many hops */
2292 return AST_CAUSE_NO_ANSWER;
2293 case 486: /* Busy everywhere */
2294 return AST_CAUSE_BUSY;
2295 case 488: /* No codecs approved */
2296 return AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
2297 case 500: /* Server internal failure */
2298 return AST_CAUSE_FAILURE;
2299 case 501: /* Call rejected */
2300 return AST_CAUSE_FACILITY_REJECTED;
2302 return AST_CAUSE_DESTINATION_OUT_OF_ORDER;
2303 case 503: /* Service unavailable */
2304 return AST_CAUSE_CONGESTION;
2306 return AST_CAUSE_NORMAL;
2313 /*! \brief hangup_cause2sip: Convert Asterisk hangup causes to SIP codes
2315 Possible values from causes.h
2316 AST_CAUSE_NOTDEFINED AST_CAUSE_NORMAL AST_CAUSE_BUSY
2317 AST_CAUSE_FAILURE AST_CAUSE_CONGESTION AST_CAUSE_UNALLOCATED
2319 In addition to these, a lot of PRI codes is defined in causes.h
2320 ...should we take care of them too ?
2324 ISUP Cause value SIP response
2325 ---------------- ------------
2326 1 unallocated number 404 Not Found
2327 2 no route to network 404 Not found
2328 3 no route to destination 404 Not found
2329 16 normal call clearing --- (*)
2330 17 user busy 486 Busy here
2331 18 no user responding 408 Request Timeout
2332 19 no answer from the user 480 Temporarily unavailable
2333 20 subscriber absent 480 Temporarily unavailable
2334 21 call rejected 403 Forbidden (+)
2335 22 number changed (w/o diagnostic) 410 Gone
2336 22 number changed (w/ diagnostic) 301 Moved Permanently
2337 23 redirection to new destination 410 Gone
2338 26 non-selected user clearing 404 Not Found (=)
2339 27 destination out of order 502 Bad Gateway
2340 28 address incomplete 484 Address incomplete
2341 29 facility rejected 501 Not implemented
2342 31 normal unspecified 480 Temporarily unavailable
2345 static char *hangup_cause2sip(int cause)
2349 case AST_CAUSE_UNALLOCATED: /* 1 */
2350 case AST_CAUSE_NO_ROUTE_DESTINATION: /* 3 IAX2: Can't find extension in context */
2351 case AST_CAUSE_NO_ROUTE_TRANSIT_NET: /* 2 */
2352 return "404 Not Found";
2353 case AST_CAUSE_CONGESTION: /* 34 */
2354 case AST_CAUSE_SWITCH_CONGESTION: /* 42 */
2355 return "503 Service Unavailable";
2356 case AST_CAUSE_NO_USER_RESPONSE: /* 18 */
2357 return "408 Request Timeout";
2358 case AST_CAUSE_NO_ANSWER: /* 19 */
2359 return "480 Temporarily unavailable";
2360 case AST_CAUSE_CALL_REJECTED: /* 21 */
2361 return "403 Forbidden";
2362 case AST_CAUSE_NUMBER_CHANGED: /* 22 */
2364 case AST_CAUSE_NORMAL_UNSPECIFIED: /* 31 */
2365 return "480 Temporarily unavailable";
2366 case AST_CAUSE_INVALID_NUMBER_FORMAT:
2367 return "484 Address incomplete";
2368 case AST_CAUSE_USER_BUSY:
2369 return "486 Busy here";
2370 case AST_CAUSE_FAILURE:
2371 return "500 Server internal failure";
2372 case AST_CAUSE_FACILITY_REJECTED: /* 29 */
2373 return "501 Not Implemented";
2374 case AST_CAUSE_CHAN_NOT_IMPLEMENTED:
2375 return "503 Service Unavailable";
2376 /* Used in chan_iax2 */
2377 case AST_CAUSE_DESTINATION_OUT_OF_ORDER:
2378 return "502 Bad Gateway";
2379 case AST_CAUSE_BEARERCAPABILITY_NOTAVAIL: /* Can't find codec to connect to host */
2380 return "488 Not Acceptable Here";
2382 case AST_CAUSE_NOTDEFINED:
2384 ast_log(LOG_DEBUG, "AST hangup cause %d (no match found in SIP)\n", cause);
2393 /*! \brief sip_hangup: Hangup SIP call
2394 * Part of PBX interface, called from ast_hangup */
2395 static int sip_hangup(struct ast_channel *ast)
2397 struct sip_pvt *p = ast->tech_pvt;
2399 struct ast_flags locflags = {0};
2402 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
2406 ast_log(LOG_DEBUG, "Hangup call %s, SIP callid %s)\n", ast->name, p->callid);
2408 ast_mutex_lock(&p->lock);
2410 if ((p->osphandle > -1) && (ast->_state == AST_STATE_UP)) {
2411 ast_osp_terminate(p->osphandle, AST_CAUSE_NORMAL, p->ospstart, time(NULL) - p->ospstart);
2414 ast_log(LOG_DEBUG, "update_call_counter(%s) - decrement call limit counter\n", p->username);
2415 update_call_counter(p, DEC_CALL_LIMIT);
2416 /* Determine how to disconnect */
2417 if (p->owner != ast) {
2418 ast_log(LOG_WARNING, "Huh? We aren't the owner? Can't hangup call.\n");
2419 ast_mutex_unlock(&p->lock);
2422 /* If the call is not UP, we need to send CANCEL instead of BYE */
2423 if (ast->_state != AST_STATE_UP)
2429 ast_dsp_free(p->vad);
2432 ast->tech_pvt = NULL;
2434 ast_mutex_lock(&usecnt_lock);
2436 ast_mutex_unlock(&usecnt_lock);
2437 ast_update_use_count();
2439 ast_set_flag(&locflags, SIP_NEEDDESTROY);
2441 /* Start the process if it's not already started */
2442 if (!ast_test_flag(p, SIP_ALREADYGONE) && !ast_strlen_zero(p->initreq.data)) {
2443 if (needcancel) { /* Outgoing call, not up */
2444 if (ast_test_flag(p, SIP_OUTGOING)) {
2445 transmit_request_with_auth(p, SIP_CANCEL, p->ocseq, 1, 0);
2446 /* Actually don't destroy us yet, wait for the 487 on our original
2447 INVITE, but do set an autodestruct just in case we never get it. */
2448 ast_clear_flag(&locflags, SIP_NEEDDESTROY);
2449 sip_scheddestroy(p, 15000);
2450 /* stop retransmitting an INVITE that has not received a response */
2451 __sip_pretend_ack(p);
2452 if ( p->initid != -1 ) {
2453 /* channel still up - reverse dec of inUse counter
2454 only if the channel is not auto-congested */
2455 update_call_counter(p, INC_CALL_LIMIT);
2457 } else { /* Incoming call, not up */
2459 if (ast->hangupcause && ((res = hangup_cause2sip(ast->hangupcause)))) {
2460 transmit_response_reliable(p, res, &p->initreq, 1);
2462 transmit_response_reliable(p, "603 Declined", &p->initreq, 1);
2464 } else { /* Call is in UP state, send BYE */
2465 if (!p->pendinginvite) {
2467 transmit_request_with_auth(p, SIP_BYE, 0, 1, 1);
2469 /* Note we will need a BYE when this all settles out
2470 but we can't send one while we have "INVITE" outstanding. */
2471 ast_set_flag(p, SIP_PENDINGBYE);
2472 ast_clear_flag(p, SIP_NEEDREINVITE);
2476 ast_copy_flags(p, (&locflags), SIP_NEEDDESTROY);
2477 ast_mutex_unlock(&p->lock);
2481 /*! \brief sip_answer: Answer SIP call , send 200 OK on Invite
2482 * Part of PBX interface */
2483 static int sip_answer(struct ast_channel *ast)
2487 struct sip_pvt *p = ast->tech_pvt;
2489 ast_mutex_lock(&p->lock);
2490 if (ast->_state != AST_STATE_UP) {
2495 codec=pbx_builtin_getvar_helper(p->owner,"SIP_CODEC");
2497 fmt=ast_getformatbyname(codec);
2499 ast_log(LOG_NOTICE, "Changing codec to '%s' for this call because of ${SIP_CODEC) variable\n",codec);
2500 if (p->jointcapability & fmt) {
2501 p->jointcapability &= fmt;
2502 p->capability &= fmt;
2504 ast_log(LOG_NOTICE, "Ignoring ${SIP_CODEC} variable because it is not shared by both ends.\n");
2505 } else ast_log(LOG_NOTICE, "Ignoring ${SIP_CODEC} variable because of unrecognized/not configured codec (check allow/disallow in sip.conf): %s\n",codec);
2508 ast_setstate(ast, AST_STATE_UP);
2510 ast_log(LOG_DEBUG, "sip_answer(%s)\n", ast->name);
2511 res = transmit_response_with_sdp(p, "200 OK", &p->initreq, 1);
2513 ast_mutex_unlock(&p->lock);
2517 /*! \brief sip_write: Send frame to media channel (rtp) ---*/
2518 static int sip_write(struct ast_channel *ast, struct ast_frame *frame)
2520 struct sip_pvt *p = ast->tech_pvt;
2522 switch (frame->frametype) {
2523 case AST_FRAME_VOICE:
2524 if (!(frame->subclass & ast->nativeformats)) {
2525 ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
2526 frame->subclass, ast->nativeformats, ast->readformat, ast->writeformat);
2530 ast_mutex_lock(&p->lock);
2532 /* If channel is not up, activate early media session */
2533 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2534 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, 0);
2535 ast_set_flag(p, SIP_PROGRESS_SENT);
2537 time(&p->lastrtptx);
2538 res = ast_rtp_write(p->rtp, frame);
2540 ast_mutex_unlock(&p->lock);
2543 case AST_FRAME_VIDEO:
2545 ast_mutex_lock(&p->lock);
2547 /* Activate video early media */
2548 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2549 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, 0);
2550 ast_set_flag(p, SIP_PROGRESS_SENT);
2552 time(&p->lastrtptx);
2553 res = ast_rtp_write(p->vrtp, frame);
2555 ast_mutex_unlock(&p->lock);
2558 case AST_FRAME_IMAGE:
2562 ast_log(LOG_WARNING, "Can't send %d type frames with SIP write\n", frame->frametype);
2569 /*! \brief sip_fixup: Fix up a channel: If a channel is consumed, this is called.
2570 Basically update any ->owner links ----*/
2571 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
2573 struct sip_pvt *p = newchan->tech_pvt;
2574 ast_mutex_lock(&p->lock);
2575 if (p->owner != oldchan) {
2576 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
2577 ast_mutex_unlock(&p->lock);
2581 ast_mutex_unlock(&p->lock);
2585 /*! \brief sip_senddigit: Send DTMF character on SIP channel */
2586 /* within one call, we're able to transmit in many methods simultaneously */
2587 static int sip_senddigit(struct ast_channel *ast, char digit)
2589 struct sip_pvt *p = ast->tech_pvt;
2591 ast_mutex_lock(&p->lock);
2592 switch (ast_test_flag(p, SIP_DTMF)) {
2594 transmit_info_with_digit(p, digit);
2596 case SIP_DTMF_RFC2833:
2598 ast_rtp_senddigit(p->rtp, digit);
2600 case SIP_DTMF_INBAND:
2604 ast_mutex_unlock(&p->lock);
2610 /*! \brief sip_transfer: Transfer SIP call */
2611 static int sip_transfer(struct ast_channel *ast, const char *dest)
2613 struct sip_pvt *p = ast->tech_pvt;
2616 ast_mutex_lock(&p->lock);
2617 if (ast->_state == AST_STATE_RING)
2618 res = sip_sipredirect(p, dest);
2620 res = transmit_refer(p, dest);
2621 ast_mutex_unlock(&p->lock);
2625 /*! \brief sip_indicate: Play indication to user
2626 * With SIP a lot of indications is sent as messages, letting the device play
2627 the indication - busy signal, congestion etc */
2628 static int sip_indicate(struct ast_channel *ast, int condition)
2630 struct sip_pvt *p = ast->tech_pvt;
2633 ast_mutex_lock(&p->lock);
2635 case AST_CONTROL_RINGING:
2636 if (ast->_state == AST_STATE_RING) {
2637 if (!ast_test_flag(p, SIP_PROGRESS_SENT) ||
2638 (ast_test_flag(p, SIP_PROG_INBAND) == SIP_PROG_INBAND_NEVER)) {
2639 /* Send 180 ringing if out-of-band seems reasonable */
2640 transmit_response(p, "180 Ringing", &p->initreq);
2641 ast_set_flag(p, SIP_RINGING);
2642 if (ast_test_flag(p, SIP_PROG_INBAND) != SIP_PROG_INBAND_YES)
2645 /* Well, if it's not reasonable, just send in-band */
2650 case AST_CONTROL_BUSY:
2651 if (ast->_state != AST_STATE_UP) {
2652 transmit_response(p, "486 Busy Here", &p->initreq);
2653 ast_set_flag(p, SIP_ALREADYGONE);
2654 ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
2659 case AST_CONTROL_CONGESTION:
2660 if (ast->_state != AST_STATE_UP) {
2661 transmit_response(p, "503 Service Unavailable", &p->initreq);
2662 ast_set_flag(p, SIP_ALREADYGONE);
2663 ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
2668 case AST_CONTROL_PROCEEDING:
2669 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2670 transmit_response(p, "100 Trying", &p->initreq);
2675 case AST_CONTROL_PROGRESS:
2676 if ((ast->_state != AST_STATE_UP) && !ast_test_flag(p, SIP_PROGRESS_SENT) && !ast_test_flag(p, SIP_OUTGOING)) {
2677 transmit_response_with_sdp(p, "183 Session Progress", &p->initreq, 0);
2678 ast_set_flag(p, SIP_PROGRESS_SENT);
2683 case AST_CONTROL_HOLD: /* The other part of the bridge are put on hold */
2685 ast_log(LOG_DEBUG, "Bridged channel now on hold%s\n", p->callid);
2688 case AST_CONTROL_UNHOLD: /* The other part of the bridge are back from hold */
2690 ast_log(LOG_DEBUG, "Bridged channel is back from hold, let's talk! : %s\n", p->callid);
2693 case AST_CONTROL_VIDUPDATE: /* Request a video frame update */
2694 if (p->vrtp && !ast_test_flag(p, SIP_NOVIDEO)) {
2695 transmit_info_with_vidupdate(p);
2704 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
2708 ast_mutex_unlock(&p->lock);
2714 /*! \brief sip_new: Initiate a call in the SIP channel */
2715 /* called from sip_request_call (calls from the pbx ) */
2716 static struct ast_channel *sip_new(struct sip_pvt *i, int state, char *title)
2718 struct ast_channel *tmp;
2719 struct ast_variable *v = NULL;
2722 char iabuf[INET_ADDRSTRLEN];
2723 char peer[MAXHOSTNAMELEN];
2726 ast_mutex_unlock(&i->lock);
2727 /* Don't hold a sip pvt lock while we allocate a channel */
2728 tmp = ast_channel_alloc(1);
2729 ast_mutex_lock(&i->lock);
2731 ast_log(LOG_WARNING, "Unable to allocate SIP channel structure\n");
2734 tmp->tech = &sip_tech;
2735 /* Select our native format based on codec preference until we receive
2736 something from another device to the contrary. */
2737 if (i->jointcapability)
2738 tmp->nativeformats = ast_codec_choose(&i->prefs, i->jointcapability, 1);
2739 else if (i->capability)
2740 tmp->nativeformats = ast_codec_choose(&i->prefs, i->capability, 1);
2742 tmp->nativeformats = ast_codec_choose(&i->prefs, global_capability, 1);
2743 ast_mutex_unlock(&i->lock);
2744 fmt = ast_best_codec(tmp->nativeformats);
2747 snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%04x", title, thread_safe_rand() & 0xffff);
2748 else if (strchr(i->fromdomain,':'))
2749 snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%08x", strchr(i->fromdomain,':')+1, (int)(long)(i));
2751 snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%08x", i->fromdomain, (int)(long)(i));
2753 tmp->type = channeltype;
2754 if (ast_test_flag(i, SIP_DTMF) == SIP_DTMF_INBAND) {
2755 i->vad = ast_dsp_new();
2756 ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
2758 ast_dsp_digitmode(i->vad, DSP_DIGITMODE_DTMF | DSP_DIGITMODE_RELAXDTMF);
2761 tmp->fds[0] = ast_rtp_fd(i->rtp);
2762 tmp->fds[1] = ast_rtcp_fd(i->rtp);
2765 tmp->fds[2] = ast_rtp_fd(i->vrtp);
2766 tmp->fds[3] = ast_rtcp_fd(i->vrtp);
2768 if (state == AST_STATE_RING)
2770 tmp->adsicpe = AST_ADSI_UNAVAILABLE;
2771 tmp->writeformat = fmt;
2772 tmp->rawwriteformat = fmt;
2773 tmp->readformat = fmt;
2774 tmp->rawreadformat = fmt;
2777 tmp->callgroup = i->callgroup;
2778 tmp->pickupgroup = i->pickupgroup;
2779 tmp->cid.cid_pres = i->callingpres;
2780 if (!ast_strlen_zero(i->accountcode))
2781 ast_copy_string(tmp->accountcode, i->accountcode, sizeof(tmp->accountcode));
2783 tmp->amaflags = i->amaflags;
2784 if (!ast_strlen_zero(i->language))
2785 ast_copy_string(tmp->language, i->language, sizeof(tmp->language));
2786 if (!ast_strlen_zero(i->musicclass))
2787 ast_copy_string(tmp->musicclass, i->musicclass, sizeof(tmp->musicclass));
2789 ast_mutex_lock(&usecnt_lock);
2791 ast_mutex_unlock(&usecnt_lock);
2792 ast_copy_string(tmp->context, i->context, sizeof(tmp->context));
2793 ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
2794 if (!ast_strlen_zero(i->cid_num))
2795 tmp->cid.cid_num = strdup(i->cid_num);
2796 if (!ast_strlen_zero(i->cid_name))
2797 tmp->cid.cid_name = strdup(i->cid_name);
2798 if (!ast_strlen_zero(i->rdnis))
2799 tmp->cid.cid_rdnis = strdup(i->rdnis);
2800 if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
2801 tmp->cid.cid_dnid = strdup(i->exten);
2803 if (!ast_strlen_zero(i->uri)) {
2804 pbx_builtin_setvar_helper(tmp, "SIPURI", i->uri);
2806 if (!ast_strlen_zero(i->domain)) {
2807 pbx_builtin_setvar_helper(tmp, "SIPDOMAIN", i->domain);
2809 if (!ast_strlen_zero(i->useragent)) {
2810 pbx_builtin_setvar_helper(tmp, "SIPUSERAGENT", i->useragent);
2812 if (!ast_strlen_zero(i->callid)) {
2813 pbx_builtin_setvar_helper(tmp, "SIPCALLID", i->callid);
2816 snprintf(peer, sizeof(peer), "[%s]:%d", ast_inet_ntoa(iabuf, sizeof(iabuf), i->sa.sin_addr), ntohs(i->sa.sin_port));
2817 pbx_builtin_setvar_helper(tmp, "OSPPEER", peer);
2819 ast_setstate(tmp, state);
2820 if (state != AST_STATE_DOWN) {
2821 if (ast_pbx_start(tmp)) {
2822 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
2827 /* Set channel variables for this call from configuration */
2828 for (v = i->chanvars ; v ; v = v->next)
2829 pbx_builtin_setvar_helper(tmp,v->name,v->value);
2834 /*! \brief get_sdp_by_line: Reads one line of SIP message body */
2835 static char* get_sdp_by_line(char* line, char *name, int nameLen)
2837 if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
2838 return ast_skip_blanks(line + nameLen + 1);
2843 /*! \brief get_sdp: Gets all kind of SIP message bodies, including SDP,
2844 but the name wrongly applies _only_ sdp */
2845 static char *get_sdp(struct sip_request *req, char *name)
2848 int len = strlen(name);
2851 for (x=0; x<req->lines; x++) {
2852 r = get_sdp_by_line(req->line[x], name, len);
2860 static void sdpLineNum_iterator_init(int* iterator)
2865 static char* get_sdp_iterate(int* iterator,
2866 struct sip_request *req, char *name)
2868 int len = strlen(name);
2871 while (*iterator < req->lines) {
2872 r = get_sdp_by_line(req->line[(*iterator)++], name, len);
2879 static char *find_alias(const char *name, char *_default)
2882 for (x=0;x<sizeof(aliases) / sizeof(aliases[0]); x++)
2883 if (!strcasecmp(aliases[x].fullname, name))
2884 return aliases[x].shortname;
2888 static char *__get_header(struct sip_request *req, char *name, int *start)
2893 * Technically you can place arbitrary whitespace both before and after the ':' in
2894 * a header, although RFC3261 clearly says you shouldn't before, and place just
2895 * one afterwards. If you shouldn't do it, what absolute idiot decided it was
2896 * a good idea to say you can do it, and if you can do it, why in the hell would.
2897 * you say you shouldn't.
2898 * Anyways, pedanticsipchecking controls whether we allow spaces before ':',
2899 * and we always allow spaces after that for compatibility.
2901 for (pass = 0; name && pass < 2;pass++) {
2902 int x, len = strlen(name);
2903 for (x=*start; x<req->headers; x++) {
2904 if (!strncasecmp(req->header[x], name, len)) {
2905 char *r = req->header[x] + len; /* skip name */
2906 if (pedanticsipchecking)
2907 r = ast_skip_blanks(r);
2911 return ast_skip_blanks(r+1);
2915 if (pass == 0) /* Try aliases */
2916 name = find_alias(name, NULL);
2919 /* Don't return NULL, so get_header is always a valid pointer */
2923 /*! \brief get_header: Get header from SIP request ---*/
2924 static char *get_header(struct sip_request *req, char *name)
2927 return __get_header(req, name, &start);
2930 /*! \brief sip_rtp_read: Read RTP from network ---*/
2931 static struct ast_frame *sip_rtp_read(struct ast_channel *ast, struct sip_pvt *p)
2933 /* Retrieve audio/etc from channel. Assumes p->lock is already held. */
2934 struct ast_frame *f;
2935 static struct ast_frame null_frame = { AST_FRAME_NULL, };
2938 /* We have no RTP allocated for this channel */
2944 f = ast_rtp_read(p->rtp); /* RTP Audio */
2947 f = ast_rtcp_read(p->rtp); /* RTCP Control Channel */
2950 f = ast_rtp_read(p->vrtp); /* RTP Video */
2953 f = ast_rtcp_read(p->vrtp); /* RTCP Control Channel for video */
2958 /* Don't forward RFC2833 if we're not supposed to */
2959 if (f && (f->frametype == AST_FRAME_DTMF) && (ast_test_flag(p, SIP_DTMF) != SIP_DTMF_RFC2833))
2962 /* We already hold the channel lock */
2963 if (f->frametype == AST_FRAME_VOICE) {
2964 if (f->subclass != p->owner->nativeformats) {
2965 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
2966 p->owner->nativeformats = f->subclass;
2967 ast_set_read_format(p->owner, p->owner->readformat);
2968 ast_set_write_format(p->owner, p->owner->writeformat);
2970 if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
2971 f = ast_dsp_process(p->owner, p->vad, f);
2972 if (f && (f->frametype == AST_FRAME_DTMF))
2973 ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
2980 /*! \brief sip_read: Read SIP RTP from channel */
2981 static struct ast_frame *sip_read(struct ast_channel *ast)
2983 struct ast_frame *fr;
2984 struct sip_pvt *p = ast->tech_pvt;
2985 ast_mutex_lock(&p->lock);
2986 fr = sip_rtp_read(ast, p);
2987 time(&p->lastrtprx);
2988 ast_mutex_unlock(&p->lock);
2992 /*! \brief build_callid: Build SIP CALLID header ---*/
2993 static void build_callid(char *callid, int len, struct in_addr ourip, char *fromdomain)
2998 char iabuf[INET_ADDRSTRLEN];
2999 for (x=0; x<4; x++) {
3000 val = thread_safe_rand();
3001 res = snprintf(callid, len, "%08x", val);
3005 if (!ast_strlen_zero(fromdomain))
3006 snprintf(callid, len, "@%s", fromdomain);
3008 /* It's not important that we really use our right IP here... */
3009 snprintf(callid, len, "@%s", ast_inet_ntoa(iabuf, sizeof(iabuf), ourip));
3012 static void make_our_tag(char *tagbuf, size_t len)
3014 snprintf(tagbuf, len, "as%08x", thread_safe_rand());
3017 /*! \brief sip_alloc: Allocate SIP_PVT structure and set defaults ---*/
3018 static struct sip_pvt *sip_alloc(char *callid, struct sockaddr_in *sin, int useglobal_nat, const int intended_method)
3022 if (!(p = calloc(1, sizeof(*p))))
3025 ast_mutex_init(&p->lock);
3027 p->method = intended_method;
3030 p->subscribed = NONE;
3033 if (intended_method != SIP_OPTIONS) /* Peerpoke has it's own system */
3034 p->timer_t1 = 500; /* Default SIP retransmission timer T1 (RFC 3261) */
3037 p->osptimelimit = 0;
3040 memcpy(&p->sa, sin, sizeof(p->sa));
3041 if (ast_sip_ouraddrfor(&p->sa.sin_addr,&p->ourip))
3042 memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
3044 memcpy(&p->ourip, &__ourip, sizeof(p->ourip));
3047 p->branch = thread_safe_rand();
3048 make_our_tag(p->tag, sizeof(p->tag));
3049 /* Start with 101 instead of 1 */
3052 if (sip_methods[intended_method].need_rtp) {
3053 p->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
3055 p->vrtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
3056 if (!p->rtp || (videosupport && !p->vrtp)) {
3057 ast_log(LOG_WARNING, "Unable to create RTP audio %s session: %s\n", videosupport ? "and video" : "", strerror(errno));
3058 ast_mutex_destroy(&p->lock);
3060 ast_variables_destroy(p->chanvars);