2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2006, Digium, Inc.
6 * Mark Spencer <markster@digium.com>
8 * See http://www.asterisk.org for more information about
9 * the Asterisk project. Please do not directly contact
10 * any of the maintainers of this project for assistance;
11 * the project provides a web site, mailing lists and IRC
12 * channels for your use.
14 * This program is free software, distributed under the terms of
15 * the GNU General Public License Version 2. See the LICENSE file
16 * at the top of the source tree.
21 * \brief Implementation of Session Initiation Protocol
23 * \author Mark Spencer <markster@digium.com>
26 * \arg \ref AstCREDITS
28 * Implementation of RFC 3261 - without S/MIME, and experimental TCP and TLS support
29 * Configuration file \link Config_sip sip.conf \endlink
31 * ********** IMPORTANT *
32 * \note TCP/TLS support is EXPERIMENTAL and WILL CHANGE. This applies to configuration
33 * settings, dialplan commands and dialplans apps/functions
34 * See \ref sip_tcp_tls
37 * ******** General TODO:s
38 * \todo Better support of forking
39 * \todo VIA branch tag transaction checking
40 * \todo Transaction support
41 * \todo Asterisk should send a non-100 provisional response every minute to keep proxies
42 * from cancelling the transaction (RFC 3261 13.3.1.1). See bug #11157.
44 * ******** Wishlist: Improvements
45 * - Support of SIP domains for devices, so that we match on username@domain in the From: header
46 * - Connect registrations with a specific device on the incoming call. It's not done
47 * automatically in Asterisk
49 * \ingroup channel_drivers
51 * \par Overview of the handling of SIP sessions
52 * The SIP channel handles several types of SIP sessions, or dialogs,
53 * not all of them being "telephone calls".
54 * - Incoming calls that will be sent to the PBX core
55 * - Outgoing calls, generated by the PBX
56 * - SIP subscriptions and notifications of states and voicemail messages
57 * - SIP registrations, both inbound and outbound
58 * - SIP peer management (peerpoke, OPTIONS)
61 * In the SIP channel, there's a list of active SIP dialogs, which includes
62 * all of these when they are active. "sip show channels" in the CLI will
63 * show most of these, excluding subscriptions which are shown by
64 * "sip show subscriptions"
66 * \par incoming packets
67 * Incoming packets are received in the monitoring thread, then handled by
68 * sipsock_read() for udp only. In tcp, packets are read by the tcp_helper thread.
69 * sipsock_read() function parses the packet and matches an existing
70 * dialog or starts a new SIP dialog.
72 * sipsock_read sends the packet to handle_incoming(), that parses a bit more.
73 * If it is a response to an outbound request, the packet is sent to handle_response().
74 * If it is a request, handle_incoming() sends it to one of a list of functions
75 * depending on the request type - INVITE, OPTIONS, REFER, BYE, CANCEL etc
76 * sipsock_read locks the ast_channel if it exists (an active call) and
77 * unlocks it after we have processed the SIP message.
79 * A new INVITE is sent to handle_request_invite(), that will end up
80 * starting a new channel in the PBX, the new channel after that executing
81 * in a separate channel thread. This is an incoming "call".
82 * When the call is answered, either by a bridged channel or the PBX itself
83 * the sip_answer() function is called.
85 * The actual media - Video or Audio - is mostly handled by the RTP subsystem
89 * Outbound calls are set up by the PBX through the sip_request_call()
90 * function. After that, they are activated by sip_call().
93 * The PBX issues a hangup on both incoming and outgoing calls through
94 * the sip_hangup() function
98 * \page sip_tcp_tls SIP TCP and TLS support
100 * \par tcpfixes TCP implementation changes needed
101 * \todo Fix TCP/TLS handling in dialplan, SRV records, transfers and much more
102 * \todo Save TCP/TLS sessions in registry
103 * If someone registers a SIPS uri, this forces us to set up a TLS connection back.
104 * \todo Add TCP/TLS information to function SIPPEER and SIPCHANINFO
105 * \todo If tcpenable=yes, we must open a TCP socket on the same address as the IP for UDP.
106 * The tcpbindaddr config option should only be used to open ADDITIONAL ports
107 * So we should propably go back to
108 * bindaddr= the default address to bind to. If tcpenable=yes, then bind this to both udp and TCP
109 * if tlsenable=yes, open TLS port (provided we also have cert)
110 * tcpbindaddr = extra address for additional TCP connections
111 * tlsbindaddr = extra address for additional TCP/TLS connections
112 * udpbindaddr = extra address for additional UDP connections
113 * These three options should take multiple IP/port pairs
114 * Note: Since opening additional listen sockets is a *new* feature we do not have today
115 * the XXXbindaddr options needs to be disabled until we have support for it
117 * \todo re-evaluate the transport= setting in sip.conf. This is right now not well
118 * thought of. If a device in sip.conf contacts us via TCP, we should not switch transport,
119 * even if udp is the configured first transport.
121 * \todo Be prepared for one outbound and another incoming socket per pvt. This applies
122 * specially to communication with other peers (proxies).
123 * \todo We need to test TCP sessions with SIP proxies and in regards
124 * to the SIP outbound specs.
125 * \todo ;transport=tls was deprecated in RFC3261 and should not be used at all. See section 26.2.2.
127 * \todo If the message is smaller than the given Content-length, the request should get a 400 Bad request
128 * message. If it's a response, it should be dropped. (RFC 3261, Section 18.3)
129 * \todo Since we have had multidomain support in Asterisk for quite a while, we need to support
130 * multiple domains in our TLS implementation, meaning one socket and one cert per domain
131 * \todo Selection of transport for a request needs to be done after we've parsed all route headers,
132 * also considering outbound proxy options.
133 * First request: Outboundproxy, routes, (reg contact or URI. If URI doesn't have port: DNS naptr, srv, AAA)
134 * Intermediate requests: Outboundproxy(only when forced), routes, contact/uri
135 * DNS naptr support is crucial. A SIP uri might lead to a TLS connection.
136 * Also note that due to outbound proxy settings, a SIPS uri might have to be sent on UDP (not to recommend though)
137 * \todo Default transports are set to UDP, which cause the wrong behaviour when contacting remote
138 * devices directly from the dialplan. UDP is only a fallback if no other method works,
139 * in order to be compatible with RFC2543 (SIP/1.0) devices. For transactions that exceed the
140 * MTU (like INIVTE with video, audio and RTT) TCP should be preferred.
142 * When dialling unconfigured peers (with no port number) or devices in external domains
143 * NAPTR records MUST be consulted to find configured transport. If they are not found,
144 * SRV records for both TCP and UDP should be checked. If there's a record for TCP, use that.
145 * If there's no record for TCP, then use UDP as a last resort. If there's no SRV records,
146 * \note this only applies if there's no outbound proxy configured for the session. If an outbound
147 * proxy is configured, these procedures might apply for locating the proxy and determining
148 * the transport to use for communication with the proxy.
149 * \par Other bugs to fix ----
150 * __set_address_from_contact(const char *fullcontact, struct sockaddr_in *sin, int tcp)
151 * - sets TLS port as default for all TCP connections, unless other port is given in contact.
152 * parse_register_contact(struct sip_pvt *pvt, struct sip_peer *peer, struct sip_request *req)
153 * - assumes that the contact the UA registers is using the same transport as the REGISTER request, which is
155 * - Does not save any information about TCP/TLS connected devices, which is a severe BUG, as discussed on the mailing list.
156 * get_destination(struct sip_pvt *p, struct sip_request *oreq)
157 * - Doesn't store the information that we got an incoming SIPS request in the channel, so that
158 * we can require a secure signalling path OUT of Asterisk (on SIP or IAX2). Possibly, the call should
159 * fail on in-secure signalling paths if there's no override in our configuration. At least, provide a
160 * channel variable in the dialplan.
161 * get_refer_info(struct sip_pvt *transferer, struct sip_request *outgoing_req)
162 * - As above, if we have a SIPS: uri in the refer-to header
163 * - Does not check transport in refer_to uri.
167 <depend>chan_local</depend>
170 /*! \page sip_session_timers SIP Session Timers in Asterisk Chan_sip
172 The SIP Session-Timers is an extension of the SIP protocol that allows end-points and proxies to
173 refresh a session periodically. The sessions are kept alive by sending a RE-INVITE or UPDATE
174 request at a negotiated interval. If a session refresh fails then all the entities that support Session-
175 Timers clear their internal session state. In addition, UAs generate a BYE request in order to clear
176 the state in the proxies and the remote UA (this is done for the benefit of SIP entities in the path
177 that do not support Session-Timers).
179 The Session-Timers can be configured on a system-wide, per-user, or per-peer basis. The peruser/
180 per-peer settings override the global settings. The following new parameters have been
181 added to the sip.conf file.
182 session-timers=["accept", "originate", "refuse"]
183 session-expires=[integer]
184 session-minse=[integer]
185 session-refresher=["uas", "uac"]
187 The session-timers parameter in sip.conf defines the mode of operation of SIP session-timers feature in
188 Asterisk. The Asterisk can be configured in one of the following three modes:
190 1. Accept :: In the "accept" mode, the Asterisk server honors session-timers requests
191 made by remote end-points. A remote end-point can request Asterisk to engage
192 session-timers by either sending it an INVITE request with a "Supported: timer"
193 header in it or by responding to Asterisk's INVITE with a 200 OK that contains
194 Session-Expires: header in it. In this mode, the Asterisk server does not
195 request session-timers from remote end-points. This is the default mode.
196 2. Originate :: In the "originate" mode, the Asterisk server requests the remote
197 end-points to activate session-timers in addition to honoring such requests
198 made by the remote end-pints. In order to get as much protection as possible
199 against hanging SIP channels due to network or end-point failures, Asterisk
200 resends periodic re-INVITEs even if a remote end-point does not support
201 the session-timers feature.
202 3. Refuse :: In the "refuse" mode, Asterisk acts as if it does not support session-
203 timers for inbound or outbound requests. If a remote end-point requests
204 session-timers in a dialog, then Asterisk ignores that request unless it's
205 noted as a requirement (Require: header), in which case the INVITE is
206 rejected with a 420 Bad Extension response.
210 #include "asterisk.h"
212 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
215 #include <sys/ioctl.h>
218 #include <sys/signal.h>
222 #include "asterisk/network.h"
223 #include "asterisk/paths.h" /* need ast_config_AST_SYSTEM_NAME */
225 #include "asterisk/lock.h"
226 #include "asterisk/channel.h"
227 #include "asterisk/config.h"
228 #include "asterisk/module.h"
229 #include "asterisk/pbx.h"
230 #include "asterisk/sched.h"
231 #include "asterisk/io.h"
232 #include "asterisk/rtp_engine.h"
233 #include "asterisk/udptl.h"
234 #include "asterisk/acl.h"
235 #include "asterisk/manager.h"
236 #include "asterisk/callerid.h"
237 #include "asterisk/cli.h"
238 #include "asterisk/app.h"
239 #include "asterisk/musiconhold.h"
240 #include "asterisk/dsp.h"
241 #include "asterisk/features.h"
242 #include "asterisk/srv.h"
243 #include "asterisk/astdb.h"
244 #include "asterisk/causes.h"
245 #include "asterisk/utils.h"
246 #include "asterisk/file.h"
247 #include "asterisk/astobj.h"
249 Uncomment the define below, if you are having refcount related memory leaks.
250 With this uncommented, this module will generate a file, /tmp/refs, which contains
251 a history of the ao2_ref() calls. To be useful, all calls to ao2_* functions should
252 be modified to ao2_t_* calls, and include a tag describing what is happening with
253 enough detail, to make pairing up a reference count increment with its corresponding decrement.
254 The refcounter program in utils/ can be invaluable in highlighting objects that are not
255 balanced, along with the complete history for that object.
256 In normal operation, the macros defined will throw away the tags, so they do not
257 affect the speed of the program at all. They can be considered to be documentation.
259 /* #define REF_DEBUG 1 */
260 #include "asterisk/astobj2.h"
261 #include "asterisk/dnsmgr.h"
262 #include "asterisk/devicestate.h"
263 #include "asterisk/linkedlists.h"
264 #include "asterisk/stringfields.h"
265 #include "asterisk/monitor.h"
266 #include "asterisk/netsock.h"
267 #include "asterisk/localtime.h"
268 #include "asterisk/abstract_jb.h"
269 #include "asterisk/threadstorage.h"
270 #include "asterisk/translate.h"
271 #include "asterisk/ast_version.h"
272 #include "asterisk/event.h"
273 #include "asterisk/tcptls.h"
274 #include "asterisk/stun.h"
275 #include "asterisk/cel.h"
278 <application name="SIPDtmfMode" language="en_US">
280 Change the dtmfmode for a SIP call.
283 <parameter name="mode" required="true">
285 <enum name="inband" />
287 <enum name="rfc2833" />
292 <para>Changes the dtmfmode for a SIP call.</para>
295 <application name="SIPAddHeader" language="en_US">
297 Add a SIP header to the outbound call.
300 <parameter name="Header" required="true" />
301 <parameter name="Content" required="true" />
304 <para>Adds a header to a SIP call placed with DIAL.</para>
305 <para>Remember to use the X-header if you are adding non-standard SIP
306 headers, like <literal>X-Asterisk-Accountcode:</literal>. Use this with care.
307 Adding the wrong headers may jeopardize the SIP dialog.</para>
308 <para>Always returns <literal>0</literal>.</para>
311 <application name="SIPRemoveHeader" language="en_US">
313 Remove SIP headers previously added with SIPAddHeader
316 <parameter name="Header" required="false" />
319 <para>SIPRemoveHeader() allows you to remove headers which were previously
320 added with SIPAddHeader(). If no parameter is supplied, all previously added
321 headers will be removed. If a parameter is supplied, only the matching headers
322 will be removed.</para>
323 <para>For example you have added these 2 headers:</para>
324 <para>SIPAddHeader(P-Asserted-Identity: sip:foo@bar);</para>
325 <para>SIPAddHeader(P-Preferred-Identity: sip:bar@foo);</para>
327 <para>// remove all headers</para>
328 <para>SIPRemoveHeader();</para>
329 <para>// remove all P- headers</para>
330 <para>SIPRemoveHeader(P-);</para>
331 <para>// remove only the PAI header (note the : at the end)</para>
332 <para>SIPRemoveHeader(P-Asserted-Identity:);</para>
334 <para>Always returns <literal>0</literal>.</para>
337 <function name="SIP_HEADER" language="en_US">
339 Gets the specified SIP header.
342 <parameter name="name" required="true" />
343 <parameter name="number">
344 <para>If not specified, defaults to <literal>1</literal>.</para>
348 <para>Since there are several headers (such as Via) which can occur multiple
349 times, SIP_HEADER takes an optional second argument to specify which header with
350 that name to retrieve. Headers start at offset <literal>1</literal>.</para>
353 <function name="SIPPEER" language="en_US">
355 Gets SIP peer information.
358 <parameter name="peername" required="true" />
359 <parameter name="item">
362 <para>(default) The ip address.</para>
365 <para>The port number.</para>
367 <enum name="mailbox">
368 <para>The configured mailbox.</para>
370 <enum name="context">
371 <para>The configured context.</para>
374 <para>The epoch time of the next expire.</para>
376 <enum name="dynamic">
377 <para>Is it dynamic? (yes/no).</para>
379 <enum name="callerid_name">
380 <para>The configured Caller ID name.</para>
382 <enum name="callerid_num">
383 <para>The configured Caller ID number.</para>
385 <enum name="callgroup">
386 <para>The configured Callgroup.</para>
388 <enum name="pickupgroup">
389 <para>The configured Pickupgroup.</para>
392 <para>The configured codecs.</para>
395 <para>Status (if qualify=yes).</para>
397 <enum name="regexten">
398 <para>Registration extension.</para>
401 <para>Call limit (call-limit).</para>
403 <enum name="busylevel">
404 <para>Configured call level for signalling busy.</para>
406 <enum name="curcalls">
407 <para>Current amount of calls. Only available if call-limit is set.</para>
409 <enum name="language">
410 <para>Default language for peer.</para>
412 <enum name="accountcode">
413 <para>Account code for this peer.</para>
415 <enum name="useragent">
416 <para>Current user agent id for peer.</para>
418 <enum name="chanvar[name]">
419 <para>A channel variable configured with setvar for this peer.</para>
421 <enum name="codec[x]">
422 <para>Preferred codec index number <replaceable>x</replaceable> (beginning with zero).</para>
429 <function name="SIPCHANINFO" language="en_US">
431 Gets the specified SIP parameter from the current channel.
434 <parameter name="item" required="true">
437 <para>The IP address of the peer.</para>
440 <para>The source IP address of the peer.</para>
443 <para>The URI from the <literal>From:</literal> header.</para>
446 <para>The URI from the <literal>Contact:</literal> header.</para>
448 <enum name="useragent">
449 <para>The useragent.</para>
451 <enum name="peername">
452 <para>The name of the peer.</para>
454 <enum name="t38passthrough">
455 <para><literal>1</literal> if T38 is offered or enabled in this channel,
456 otherwise <literal>0</literal>.</para>
463 <function name="CHECKSIPDOMAIN" language="en_US">
465 Checks if domain is a local domain.
468 <parameter name="domain" required="true" />
471 <para>This function checks if the <replaceable>domain</replaceable> in the argument is configured
472 as a local SIP domain that this Asterisk server is configured to handle.
473 Returns the domain name if it is locally handled, otherwise an empty string.
474 Check the <literal>domain=</literal> configuration in <filename>sip.conf</filename>.</para>
477 <manager name="SIPpeers" language="en_US">
479 List SIP peers (text format).
482 <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
485 <para>Lists SIP peers in text format with details on current status.
486 Peerlist will follow as separate events, followed by a final event called
487 PeerlistComplete.</para>
490 <manager name="SIPshowpeer" language="en_US">
492 show SIP peer (text format).
495 <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
496 <parameter name="Peer" required="true">
497 <para>The peer name you want to check.</para>
501 <para>Show one SIP peer with details on current status.</para>
504 <manager name="SIPqualifypeer" language="en_US">
509 <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
510 <parameter name="Peer" required="true">
511 <para>The peer name you want to qualify.</para>
515 <para>Qualify a SIP peer.</para>
518 <manager name="SIPshowregistry" language="en_US">
520 Show SIP registrations (text format).
523 <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
526 <para>Lists all registration requests and status. Registrations will follow as separate
527 events. followed by a final event called RegistrationsComplete.</para>
530 <manager name="SIPnotify" language="en_US">
535 <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
536 <parameter name="Channel" required="true">
537 <para>Peer to receive the notify.</para>
539 <parameter name="Variable" required="true">
540 <para>At least one variable pair must be specified.
541 <replaceable>name</replaceable>=<replaceable>value</replaceable></para>
545 <para>Sends a SIP Notify event.</para>
546 <para>All parameters for this event must be specified in the body of this request
547 via multiple Variable: name=value sequences.</para>
561 #define MAX(a,b) ((a) > (b) ? (a) : (b))
564 /* Arguments for find_peer */
565 #define FINDUSERS (1 << 0)
566 #define FINDPEERS (1 << 1)
567 #define FINDALLDEVICES (FINDUSERS | FINDPEERS)
569 #define SIPBUFSIZE 512 /*!< Buffer size for many operations */
571 #define XMIT_ERROR -2
573 #define SIP_RESERVED ";/?:@&=+$,# " /*!< Reserved characters in the username part of the URI */
575 /* #define VOCAL_DATA_HACK */
577 #define DEFAULT_DEFAULT_EXPIRY 120
578 #define DEFAULT_MIN_EXPIRY 60
579 #define DEFAULT_MAX_EXPIRY 3600
580 #define DEFAULT_MWI_EXPIRY 3600
581 #define DEFAULT_REGISTRATION_TIMEOUT 20
582 #define DEFAULT_MAX_FORWARDS "70"
584 /* guard limit must be larger than guard secs */
585 /* guard min must be < 1000, and should be >= 250 */
586 #define EXPIRY_GUARD_SECS 15 /*!< How long before expiry do we reregister */
587 #define EXPIRY_GUARD_LIMIT 30 /*!< Below here, we use EXPIRY_GUARD_PCT instead of
589 #define EXPIRY_GUARD_MIN 500 /*!< This is the minimum guard time applied. If
590 GUARD_PCT turns out to be lower than this, it
591 will use this time instead.
592 This is in milliseconds. */
593 #define EXPIRY_GUARD_PCT 0.20 /*!< Percentage of expires timeout to use when
594 below EXPIRY_GUARD_LIMIT */
595 #define DEFAULT_EXPIRY 900 /*!< Expire slowly */
597 static int min_expiry = DEFAULT_MIN_EXPIRY; /*!< Minimum accepted registration time */
598 static int max_expiry = DEFAULT_MAX_EXPIRY; /*!< Maximum accepted registration time */
599 static int default_expiry = DEFAULT_DEFAULT_EXPIRY;
600 static int mwi_expiry = DEFAULT_MWI_EXPIRY;
602 #define DEFAULT_QUALIFY_GAP 100
603 #define DEFAULT_QUALIFY_PEERS 1
606 #define CALLERID_UNKNOWN "Anonymous"
607 #define FROMDOMAIN_INVALID "anonymous.invalid"
609 #define DEFAULT_MAXMS 2000 /*!< Qualification: Must be faster than 2 seconds by default */
610 #define DEFAULT_QUALIFYFREQ 60 * 1000 /*!< Qualification: How often to check for the host to be up */
611 #define DEFAULT_FREQ_NOTOK 10 * 1000 /*!< Qualification: How often to check, if the host is down... */
613 #define DEFAULT_RETRANS 1000 /*!< How frequently to retransmit Default: 2 * 500 ms in RFC 3261 */
614 #define MAX_RETRANS 6 /*!< Try only 6 times for retransmissions, a total of 7 transmissions */
615 #define DEFAULT_TIMER_T1 500 /*!< SIP timer T1 (according to RFC 3261) */
616 #define SIP_TRANS_TIMEOUT 64 * DEFAULT_TIMER_T1 /*!< SIP request timeout (rfc 3261) 64*T1
617 \todo Use known T1 for timeout (peerpoke)
619 #define DEFAULT_TRANS_TIMEOUT -1 /*!< Use default SIP transaction timeout */
620 #define MAX_AUTHTRIES 3 /*!< Try authentication three times, then fail */
622 #define SIP_MAX_HEADERS 64 /*!< Max amount of SIP headers to read */
623 #define SIP_MAX_LINES 64 /*!< Max amount of lines in SIP attachment (like SDP) */
624 #define SIP_MIN_PACKET 4096 /*!< Initialize size of memory to allocate for packets */
625 #define MAX_HISTORY_ENTRIES 50 /*!< Max entires in the history list for a sip_pvt */
627 #define INITIAL_CSEQ 101 /*!< Our initial sip sequence number */
629 #define DEFAULT_MAX_SE 1800 /*!< Session-Timer Default Session-Expires period (RFC 4028) */
630 #define DEFAULT_MIN_SE 90 /*!< Session-Timer Default Min-SE period (RFC 4028) */
632 #define SDP_MAX_RTPMAP_CODECS 32 /*!< Maximum number of codecs allowed in received SDP */
634 /*! \brief Global jitterbuffer configuration - by default, jb is disabled */
635 static struct ast_jb_conf default_jbconf =
639 .resync_threshold = -1,
642 static struct ast_jb_conf global_jbconf; /*!< Global jitterbuffer configuration */
644 static const char config[] = "sip.conf"; /*!< Main configuration file */
645 static const char notify_config[] = "sip_notify.conf"; /*!< Configuration file for sending Notify with CLI commands to reconfigure or reboot phones */
650 /*! \brief Authorization scheme for call transfers
652 \note Not a bitfield flag, since there are plans for other modes,
653 like "only allow transfers for authenticated devices" */
655 TRANSFER_OPENFORALL, /*!< Allow all SIP transfers */
656 TRANSFER_CLOSED, /*!< Allow no SIP transfers */
660 /*! \brief The result of a lot of functions */
662 AST_SUCCESS = 0, /*!< FALSE means success, funny enough */
663 AST_FAILURE = -1, /*!< Failure code */
666 /*! \brief States for the INVITE transaction, not the dialog
667 \note this is for the INVITE that sets up the dialog
670 INV_NONE = 0, /*!< No state at all, maybe not an INVITE dialog */
671 INV_CALLING = 1, /*!< Invite sent, no answer */
672 INV_PROCEEDING = 2, /*!< We got/sent 1xx message */
673 INV_EARLY_MEDIA = 3, /*!< We got 18x message with to-tag back */
674 INV_COMPLETED = 4, /*!< Got final response with error. Wait for ACK, then CONFIRMED */
675 INV_CONFIRMED = 5, /*!< Confirmed response - we've got an ack (Incoming calls only) */
676 INV_TERMINATED = 6, /*!< Transaction done - either successful (AST_STATE_UP) or failed, but done
677 The only way out of this is a BYE from one side */
678 INV_CANCELLED = 7, /*!< Transaction cancelled by client or server in non-terminated state */
681 /*! \brief Readable descriptions of device states.
682 \note Should be aligned to above table as index */
683 static const struct invstate2stringtable {
684 const enum invitestates state;
686 } invitestate2string[] = {
688 {INV_CALLING, "Calling (Trying)"},
689 {INV_PROCEEDING, "Proceeding "},
690 {INV_EARLY_MEDIA, "Early media"},
691 {INV_COMPLETED, "Completed (done)"},
692 {INV_CONFIRMED, "Confirmed (up)"},
693 {INV_TERMINATED, "Done"},
694 {INV_CANCELLED, "Cancelled"}
697 /*! \brief When sending a SIP message, we can send with a few options, depending on
698 type of SIP request. UNRELIABLE is moslty used for responses to repeated requests,
699 where the original response would be sent RELIABLE in an INVITE transaction */
701 XMIT_CRITICAL = 2, /*!< Transmit critical SIP message reliably, with re-transmits.
702 If it fails, it's critical and will cause a teardown of the session */
703 XMIT_RELIABLE = 1, /*!< Transmit SIP message reliably, with re-transmits */
704 XMIT_UNRELIABLE = 0, /*!< Transmit SIP message without bothering with re-transmits */
707 /*! \brief Results from the parse_register() function */
708 enum parse_register_result {
709 PARSE_REGISTER_FAILED,
710 PARSE_REGISTER_UPDATE,
711 PARSE_REGISTER_QUERY,
714 /*! \brief Type of subscription, based on the packages we do support, see \ref subscription_types */
715 enum subscriptiontype {
724 /*! \brief Subscription types that we support. We support
725 - dialoginfo updates (really device status, not dialog info as was the original intent of the standard)
726 - SIMPLE presence used for device status
727 - Voicemail notification subscriptions
729 static const struct cfsubscription_types {
730 enum subscriptiontype type;
731 const char * const event;
732 const char * const mediatype;
733 const char * const text;
734 } subscription_types[] = {
735 { NONE, "-", "unknown", "unknown" },
736 /* RFC 4235: SIP Dialog event package */
737 { DIALOG_INFO_XML, "dialog", "application/dialog-info+xml", "dialog-info+xml" },
738 { CPIM_PIDF_XML, "presence", "application/cpim-pidf+xml", "cpim-pidf+xml" }, /* RFC 3863 */
739 { PIDF_XML, "presence", "application/pidf+xml", "pidf+xml" }, /* RFC 3863 */
740 { XPIDF_XML, "presence", "application/xpidf+xml", "xpidf+xml" }, /* Pre-RFC 3863 with MS additions */
741 { MWI_NOTIFICATION, "message-summary", "application/simple-message-summary", "mwi" } /* RFC 3842: Mailbox notification */
745 /*! \brief Authentication types - proxy or www authentication
746 \note Endpoints, like Asterisk, should always use WWW authentication to
747 allow multiple authentications in the same call - to the proxy and
755 /*! \brief Authentication result from check_auth* functions */
756 enum check_auth_result {
757 AUTH_DONT_KNOW = -100, /*!< no result, need to check further */
758 /* XXX maybe this is the same as AUTH_NOT_FOUND */
761 AUTH_CHALLENGE_SENT = 1,
762 AUTH_SECRET_FAILED = -1,
763 AUTH_USERNAME_MISMATCH = -2,
764 AUTH_NOT_FOUND = -3, /*!< returned by register_verify */
766 AUTH_UNKNOWN_DOMAIN = -5,
767 AUTH_PEER_NOT_DYNAMIC = -6,
768 AUTH_ACL_FAILED = -7,
769 AUTH_BAD_TRANSPORT = -8,
773 /*! \brief States for outbound registrations (with register= lines in sip.conf */
774 enum sipregistrystate {
775 REG_STATE_UNREGISTERED = 0, /*!< We are not registered
776 * \note Initial state. We should have a timeout scheduled for the initial
777 * (or next) registration transmission, calling sip_reregister
780 REG_STATE_REGSENT, /*!< Registration request sent
781 * \note sent initial request, waiting for an ack or a timeout to
782 * retransmit the initial request.
785 REG_STATE_AUTHSENT, /*!< We have tried to authenticate
786 * \note entered after transmit_register with auth info,
787 * waiting for an ack.
790 REG_STATE_REGISTERED, /*!< Registered and done */
792 REG_STATE_REJECTED, /*!< Registration rejected *
793 * \note only used when the remote party has an expire larger than
794 * our max-expire. This is a final state from which we do not
795 * recover (not sure how correctly).
798 REG_STATE_TIMEOUT, /*!< Registration timed out *
799 * \note XXX unused */
801 REG_STATE_NOAUTH, /*!< We have no accepted credentials
802 * \note fatal - no chance to proceed */
804 REG_STATE_FAILED, /*!< Registration failed after several tries
805 * \note fatal - no chance to proceed */
808 /*! \brief Modes in which Asterisk can be configured to run SIP Session-Timers */
810 SESSION_TIMER_MODE_INVALID = 0, /*!< Invalid value */
811 SESSION_TIMER_MODE_ACCEPT, /*!< Honor inbound Session-Timer requests */
812 SESSION_TIMER_MODE_ORIGINATE, /*!< Originate outbound and honor inbound requests */
813 SESSION_TIMER_MODE_REFUSE /*!< Ignore inbound Session-Timers requests */
816 /*! \brief The entity playing the refresher role for Session-Timers */
818 SESSION_TIMER_REFRESHER_AUTO, /*!< Negotiated */
819 SESSION_TIMER_REFRESHER_UAC, /*!< Session is refreshed by the UAC */
820 SESSION_TIMER_REFRESHER_UAS /*!< Session is refreshed by the UAS */
823 /*! \brief Define some implemented SIP transports
824 \note Asterisk does not support SCTP or UDP/DTLS
827 SIP_TRANSPORT_UDP = 1, /*!< Unreliable transport for SIP, needs retransmissions */
828 SIP_TRANSPORT_TCP = 1 << 1, /*!< Reliable, but unsecure */
829 SIP_TRANSPORT_TLS = 1 << 2, /*!< TCP/TLS - reliable and secure transport for signalling */
832 /*! \brief definition of a sip proxy server
834 * For outbound proxies, a sip_peer will contain a reference to a
835 * dynamically allocated instance of a sip_proxy. A sip_pvt may also
836 * contain a reference to a peer's outboundproxy, or it may contain
837 * a reference to the sip_cfg.outboundproxy.
840 char name[MAXHOSTNAMELEN]; /*!< DNS name of domain/host or IP */
841 struct sockaddr_in ip; /*!< Currently used IP address and port */
842 time_t last_dnsupdate; /*!< When this was resolved */
843 enum sip_transport transport;
844 int force; /*!< If it's an outbound proxy, Force use of this outbound proxy for all outbound requests */
845 /* Room for a SRV record chain based on the name */
848 /*! \brief argument for the 'show channels|subscriptions' callback. */
849 struct __show_chan_arg {
852 int numchans; /* return value */
856 /*! \brief States whether a SIP message can create a dialog in Asterisk. */
857 enum can_create_dialog {
858 CAN_NOT_CREATE_DIALOG,
860 CAN_CREATE_DIALOG_UNSUPPORTED_METHOD,
863 /*! \brief SIP Request methods known by Asterisk
865 \note Do _NOT_ make any changes to this enum, or the array following it;
866 if you think you are doing the right thing, you are probably
867 not doing the right thing. If you think there are changes
868 needed, get someone else to review them first _before_
869 submitting a patch. If these two lists do not match properly
870 bad things will happen.
874 SIP_UNKNOWN, /*!< Unknown response */
875 SIP_RESPONSE, /*!< Not request, response to outbound request */
876 SIP_REGISTER, /*!< Registration to the mothership, tell us where you are located */
877 SIP_OPTIONS, /*!< Check capabilities of a device, used for "ping" too */
878 SIP_NOTIFY, /*!< Status update, Part of the event package standard, result of a SUBSCRIBE or a REFER */
879 SIP_INVITE, /*!< Set up a session */
880 SIP_ACK, /*!< End of a three-way handshake started with INVITE. */
881 SIP_PRACK, /*!< Reliable pre-call signalling. Not supported in Asterisk. */
882 SIP_BYE, /*!< End of a session */
883 SIP_REFER, /*!< Refer to another URI (transfer) */
884 SIP_SUBSCRIBE, /*!< Subscribe for updates (voicemail, session status, device status, presence) */
885 SIP_MESSAGE, /*!< Text messaging */
886 SIP_UPDATE, /*!< Update a dialog. We can send UPDATE; but not accept it */
887 SIP_INFO, /*!< Information updates during a session */
888 SIP_CANCEL, /*!< Cancel an INVITE */
889 SIP_PUBLISH, /*!< Not supported in Asterisk */
890 SIP_PING, /*!< Not supported at all, no standard but still implemented out there */
893 /*! \brief Settings for the 'notifycid' option, see sip.conf.sample for details. */
894 enum notifycid_setting {
900 /*! \brief The core structure to setup dialogs. We parse incoming messages by using
901 structure and then route the messages according to the type.
903 \note Note that sip_methods[i].id == i must hold or the code breaks */
904 static const struct cfsip_methods {
906 int need_rtp; /*!< when this is the 'primary' use for a pvt structure, does it need RTP? */
908 enum can_create_dialog can_create;
910 { SIP_UNKNOWN, RTP, "-UNKNOWN-", CAN_CREATE_DIALOG },
911 { SIP_RESPONSE, NO_RTP, "SIP/2.0", CAN_NOT_CREATE_DIALOG },
912 { SIP_REGISTER, NO_RTP, "REGISTER", CAN_CREATE_DIALOG },
913 { SIP_OPTIONS, NO_RTP, "OPTIONS", CAN_CREATE_DIALOG },
914 { SIP_NOTIFY, NO_RTP, "NOTIFY", CAN_CREATE_DIALOG },
915 { SIP_INVITE, RTP, "INVITE", CAN_CREATE_DIALOG },
916 { SIP_ACK, NO_RTP, "ACK", CAN_NOT_CREATE_DIALOG },
917 { SIP_PRACK, NO_RTP, "PRACK", CAN_NOT_CREATE_DIALOG },
918 { SIP_BYE, NO_RTP, "BYE", CAN_NOT_CREATE_DIALOG },
919 { SIP_REFER, NO_RTP, "REFER", CAN_CREATE_DIALOG },
920 { SIP_SUBSCRIBE, NO_RTP, "SUBSCRIBE", CAN_CREATE_DIALOG },
921 { SIP_MESSAGE, NO_RTP, "MESSAGE", CAN_CREATE_DIALOG },
922 { SIP_UPDATE, NO_RTP, "UPDATE", CAN_NOT_CREATE_DIALOG },
923 { SIP_INFO, NO_RTP, "INFO", CAN_NOT_CREATE_DIALOG },
924 { SIP_CANCEL, NO_RTP, "CANCEL", CAN_NOT_CREATE_DIALOG },
925 { SIP_PUBLISH, NO_RTP, "PUBLISH", CAN_CREATE_DIALOG_UNSUPPORTED_METHOD },
926 { SIP_PING, NO_RTP, "PING", CAN_CREATE_DIALOG_UNSUPPORTED_METHOD }
929 /*! Define SIP option tags, used in Require: and Supported: headers
930 We need to be aware of these properties in the phones to use
931 the replace: header. We should not do that without knowing
932 that the other end supports it...
933 This is nothing we can configure, we learn by the dialog
934 Supported: header on the REGISTER (peer) or the INVITE
936 We are not using many of these today, but will in the future.
937 This is documented in RFC 3261
940 #define NOT_SUPPORTED 0
943 #define SIP_OPT_REPLACES (1 << 0)
944 #define SIP_OPT_100REL (1 << 1)
945 #define SIP_OPT_TIMER (1 << 2)
946 #define SIP_OPT_EARLY_SESSION (1 << 3)
947 #define SIP_OPT_JOIN (1 << 4)
948 #define SIP_OPT_PATH (1 << 5)
949 #define SIP_OPT_PREF (1 << 6)
950 #define SIP_OPT_PRECONDITION (1 << 7)
951 #define SIP_OPT_PRIVACY (1 << 8)
952 #define SIP_OPT_SDP_ANAT (1 << 9)
953 #define SIP_OPT_SEC_AGREE (1 << 10)
954 #define SIP_OPT_EVENTLIST (1 << 11)
955 #define SIP_OPT_GRUU (1 << 12)
956 #define SIP_OPT_TARGET_DIALOG (1 << 13)
957 #define SIP_OPT_NOREFERSUB (1 << 14)
958 #define SIP_OPT_HISTINFO (1 << 15)
959 #define SIP_OPT_RESPRIORITY (1 << 16)
960 #define SIP_OPT_FROMCHANGE (1 << 17)
961 #define SIP_OPT_RECLISTINV (1 << 18)
962 #define SIP_OPT_RECLISTSUB (1 << 19)
963 #define SIP_OPT_OUTBOUND (1 << 20)
964 #define SIP_OPT_UNKNOWN (1 << 21)
967 /*! \brief List of well-known SIP options. If we get this in a require,
968 we should check the list and answer accordingly. */
969 static const struct cfsip_options {
970 int id; /*!< Bitmap ID */
971 int supported; /*!< Supported by Asterisk ? */
972 char * const text; /*!< Text id, as in standard */
973 } sip_options[] = { /* XXX used in 3 places */
974 /* RFC3262: PRACK 100% reliability */
975 { SIP_OPT_100REL, NOT_SUPPORTED, "100rel" },
976 /* RFC3959: SIP Early session support */
977 { SIP_OPT_EARLY_SESSION, NOT_SUPPORTED, "early-session" },
978 /* SIMPLE events: RFC4662 */
979 { SIP_OPT_EVENTLIST, NOT_SUPPORTED, "eventlist" },
980 /* RFC 4916- Connected line ID updates */
981 { SIP_OPT_FROMCHANGE, NOT_SUPPORTED, "from-change" },
982 /* GRUU: Globally Routable User Agent URI's */
983 { SIP_OPT_GRUU, NOT_SUPPORTED, "gruu" },
984 /* RFC4244 History info */
985 { SIP_OPT_HISTINFO, NOT_SUPPORTED, "histinfo" },
986 /* RFC3911: SIP Join header support */
987 { SIP_OPT_JOIN, NOT_SUPPORTED, "join" },
988 /* Disable the REFER subscription, RFC 4488 */
989 { SIP_OPT_NOREFERSUB, NOT_SUPPORTED, "norefersub" },
990 /* SIP outbound - the final NAT battle - draft-sip-outbound */
991 { SIP_OPT_OUTBOUND, NOT_SUPPORTED, "outbound" },
992 /* RFC3327: Path support */
993 { SIP_OPT_PATH, NOT_SUPPORTED, "path" },
994 /* RFC3840: Callee preferences */
995 { SIP_OPT_PREF, NOT_SUPPORTED, "pref" },
996 /* RFC3312: Precondition support */
997 { SIP_OPT_PRECONDITION, NOT_SUPPORTED, "precondition" },
998 /* RFC3323: Privacy with proxies*/
999 { SIP_OPT_PRIVACY, NOT_SUPPORTED, "privacy" },
1000 /* RFC-ietf-sip-uri-list-conferencing-02.txt conference invite lists */
1001 { SIP_OPT_RECLISTINV, NOT_SUPPORTED, "recipient-list-invite" },
1002 /* RFC-ietf-sip-uri-list-subscribe-02.txt - subscription lists */
1003 { SIP_OPT_RECLISTSUB, NOT_SUPPORTED, "recipient-list-subscribe" },
1004 /* RFC3891: Replaces: header for transfer */
1005 { SIP_OPT_REPLACES, SUPPORTED, "replaces" },
1006 /* One version of Polycom firmware has the wrong label */
1007 { SIP_OPT_REPLACES, SUPPORTED, "replace" },
1008 /* RFC4412 Resource priorities */
1009 { SIP_OPT_RESPRIORITY, NOT_SUPPORTED, "resource-priority" },
1010 /* RFC3329: Security agreement mechanism */
1011 { SIP_OPT_SEC_AGREE, NOT_SUPPORTED, "sec_agree" },
1012 /* RFC4092: Usage of the SDP ANAT Semantics in the SIP */
1013 { SIP_OPT_SDP_ANAT, NOT_SUPPORTED, "sdp-anat" },
1014 /* RFC4028: SIP Session-Timers */
1015 { SIP_OPT_TIMER, SUPPORTED, "timer" },
1016 /* RFC4538: Target-dialog */
1017 { SIP_OPT_TARGET_DIALOG,NOT_SUPPORTED, "tdialog" },
1020 /*! \brief Diversion header reasons
1022 * The core defines a bunch of constants used to define
1023 * redirecting reasons. This provides a translation table
1024 * between those and the strings which may be present in
1025 * a SIP Diversion header
1027 static const struct sip_reasons {
1028 enum AST_REDIRECTING_REASON code;
1030 } sip_reason_table[] = {
1031 { AST_REDIRECTING_REASON_UNKNOWN, "unknown" },
1032 { AST_REDIRECTING_REASON_USER_BUSY, "user-busy" },
1033 { AST_REDIRECTING_REASON_NO_ANSWER, "no-answer" },
1034 { AST_REDIRECTING_REASON_UNAVAILABLE, "unavailable" },
1035 { AST_REDIRECTING_REASON_UNCONDITIONAL, "unconditional" },
1036 { AST_REDIRECTING_REASON_TIME_OF_DAY, "time-of-day" },
1037 { AST_REDIRECTING_REASON_DO_NOT_DISTURB, "do-not-disturb" },
1038 { AST_REDIRECTING_REASON_DEFLECTION, "deflection" },
1039 { AST_REDIRECTING_REASON_FOLLOW_ME, "follow-me" },
1040 { AST_REDIRECTING_REASON_OUT_OF_ORDER, "out-of-service" },
1041 { AST_REDIRECTING_REASON_AWAY, "away" },
1042 { AST_REDIRECTING_REASON_CALL_FWD_DTE, "unknown"}
1045 static enum AST_REDIRECTING_REASON sip_reason_str_to_code(const char *text)
1047 enum AST_REDIRECTING_REASON ast = AST_REDIRECTING_REASON_UNKNOWN;
1050 for (i = 0; i < ARRAY_LEN(sip_reason_table); ++i) {
1051 if (!strcasecmp(text, sip_reason_table[i].text)) {
1052 ast = sip_reason_table[i].code;
1060 static const char *sip_reason_code_to_str(enum AST_REDIRECTING_REASON code)
1062 if (code >= 0 && code < ARRAY_LEN(sip_reason_table)) {
1063 return sip_reason_table[code].text;
1069 /*! \brief SIP Methods we support
1070 \todo This string should be set dynamically. We only support REFER and SUBSCRIBE if we have
1071 allowsubscribe and allowrefer on in sip.conf.
1073 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO"
1075 /*! \brief SIP Extensions we support
1076 \note This should be generated based on the previous array
1077 in combination with settings.
1078 \todo We should not have "timer" if it's disabled in the configuration file.
1080 #define SUPPORTED_EXTENSIONS "replaces, timer"
1082 /*! \brief Standard SIP unsecure port for UDP and TCP from RFC 3261. DO NOT CHANGE THIS */
1083 #define STANDARD_SIP_PORT 5060
1084 /*! \brief Standard SIP TLS port from RFC 3261. DO NOT CHANGE THIS */
1085 #define STANDARD_TLS_PORT 5061
1087 /*! \note in many SIP headers, absence of a port number implies port 5060,
1088 * and this is why we cannot change the above constant.
1089 * There is a limited number of places in asterisk where we could,
1090 * in principle, use a different "default" port number, but
1091 * we do not support this feature at the moment.
1092 * You can run Asterisk with SIP on a different port with a configuration
1093 * option. If you change this value, the signalling will be incorrect.
1096 /*! \name DefaultValues Default values, set and reset in reload_config before reading configuration
1098 These are default values in the source. There are other recommended values in the
1099 sip.conf.sample for new installations. These may differ to keep backwards compatibility,
1100 yet encouraging new behaviour on new installations
1103 #define DEFAULT_CONTEXT "default" /*!< The default context for [general] section as well as devices */
1104 #define DEFAULT_MOHINTERPRET "default" /*!< The default music class */
1105 #define DEFAULT_MOHSUGGEST ""
1106 #define DEFAULT_VMEXTEN "asterisk" /*!< Default voicemail extension */
1107 #define DEFAULT_CALLERID "asterisk" /*!< Default caller ID */
1108 #define DEFAULT_MWI_FROM ""
1109 #define DEFAULT_NOTIFYMIME "application/simple-message-summary"
1110 #define DEFAULT_ALLOWGUEST TRUE
1111 #define DEFAULT_RTPKEEPALIVE 0 /*!< Default RTPkeepalive setting */
1112 #define DEFAULT_CALLCOUNTER FALSE
1113 #define DEFAULT_SRVLOOKUP TRUE /*!< Recommended setting is ON */
1114 #define DEFAULT_COMPACTHEADERS FALSE /*!< Send compact (one-character) SIP headers. Default off */
1115 #define DEFAULT_TOS_SIP 0 /*!< Call signalling packets should be marked as DSCP CS3, but the default is 0 to be compatible with previous versions. */
1116 #define DEFAULT_TOS_AUDIO 0 /*!< Audio packets should be marked as DSCP EF (Expedited Forwarding), but the default is 0 to be compatible with previous versions. */
1117 #define DEFAULT_TOS_VIDEO 0 /*!< Video packets should be marked as DSCP AF41, but the default is 0 to be compatible with previous versions. */
1118 #define DEFAULT_TOS_TEXT 0 /*!< Text packets should be marked as XXXX XXXX, but the default is 0 to be compatible with previous versions. */
1119 #define DEFAULT_COS_SIP 4 /*!< Level 2 class of service for SIP signalling */
1120 #define DEFAULT_COS_AUDIO 5 /*!< Level 2 class of service for audio media */
1121 #define DEFAULT_COS_VIDEO 6 /*!< Level 2 class of service for video media */
1122 #define DEFAULT_COS_TEXT 5 /*!< Level 2 class of service for text media (T.140) */
1123 #define DEFAULT_ALLOW_EXT_DOM TRUE /*!< Allow external domains */
1124 #define DEFAULT_REALM "asterisk" /*!< Realm for HTTP digest authentication */
1125 #define DEFAULT_NOTIFYRINGING TRUE /*!< Notify devicestate system on ringing state */
1126 #define DEFAULT_NOTIFYCID DISABLED /*!< Include CID with ringing notifications */
1127 #define DEFAULT_PEDANTIC FALSE /*!< Avoid following SIP standards for dialog matching */
1128 #define DEFAULT_AUTOCREATEPEER FALSE /*!< Don't create peers automagically */
1129 #define DEFAULT_MATCHEXTERNIPLOCALLY FALSE /*!< Match extern IP locally default setting */
1130 #define DEFAULT_QUALIFY FALSE /*!< Don't monitor devices */
1131 #define DEFAULT_CALLEVENTS FALSE /*!< Extra manager SIP call events */
1132 #define DEFAULT_ALWAYSAUTHREJECT FALSE /*!< Don't reject authentication requests always */
1133 #define DEFAULT_REGEXTENONQUALIFY FALSE
1134 #define DEFAULT_T1MIN 100 /*!< 100 MS for minimal roundtrip time */
1135 #define DEFAULT_MAX_CALL_BITRATE (384) /*!< Max bitrate for video */
1136 #ifndef DEFAULT_USERAGENT
1137 #define DEFAULT_USERAGENT "Asterisk PBX" /*!< Default Useragent: header unless re-defined in sip.conf */
1138 #define DEFAULT_SDPSESSION "Asterisk PBX" /*!< Default SDP session name, (s=) header unless re-defined in sip.conf */
1139 #define DEFAULT_SDPOWNER "root" /*!< Default SDP username field in (o=) header unless re-defined in sip.conf */
1140 #define DEFAULT_ENGINE "asterisk" /*!< Default RTP engine to use for sessions */
1144 /*! \name DefaultSettings
1145 Default setttings are used as a channel setting and as a default when
1149 static char default_language[MAX_LANGUAGE];
1150 static char default_callerid[AST_MAX_EXTENSION];
1151 static char default_mwi_from[80];
1152 static char default_fromdomain[AST_MAX_EXTENSION];
1153 static char default_notifymime[AST_MAX_EXTENSION];
1154 static int default_qualify; /*!< Default Qualify= setting */
1155 static char default_vmexten[AST_MAX_EXTENSION];
1156 static char default_mohinterpret[MAX_MUSICCLASS]; /*!< Global setting for moh class to use when put on hold */
1157 static char default_mohsuggest[MAX_MUSICCLASS]; /*!< Global setting for moh class to suggest when putting
1158 * a bridged channel on hold */
1159 static char default_parkinglot[AST_MAX_CONTEXT]; /*!< Parkinglot */
1160 static char default_engine[256]; /*!< Default RTP engine */
1161 static int default_maxcallbitrate; /*!< Maximum bitrate for call */
1162 static struct ast_codec_pref default_prefs; /*!< Default codec prefs */
1163 static unsigned int default_transports; /*!< Default Transports (enum sip_transport) that are acceptable */
1164 static unsigned int default_primary_transport; /*!< Default primary Transport (enum sip_transport) for outbound connections to devices */
1168 /*! \name GlobalSettings
1169 Global settings apply to the channel (often settings you can change in the general section
1173 /*! \brief a place to store all global settings for the sip channel driver
1174 These are settings that will be possibly to apply on a group level later on.
1175 \note Do not add settings that only apply to the channel itself and can't
1176 be applied to devices (trunks, services, phones)
1178 struct sip_settings {
1179 int peer_rtupdate; /*!< G: Update database with registration data for peer? */
1180 int rtsave_sysname; /*!< G: Save system name at registration? */
1181 int ignore_regexpire; /*!< G: Ignore expiration of peer */
1182 int rtautoclear; /*!< Realtime ?? */
1183 int directrtpsetup; /*!< Enable support for Direct RTP setup (no re-invites) */
1184 int pedanticsipchecking; /*!< Extra checking ? Default off */
1185 int autocreatepeer; /*!< Auto creation of peers at registration? Default off. */
1186 int srvlookup; /*!< SRV Lookup on or off. Default is on */
1187 int allowguest; /*!< allow unauthenticated peers to connect? */
1188 int alwaysauthreject; /*!< Send 401 Unauthorized for all failing requests */
1189 int compactheaders; /*!< send compact sip headers */
1190 int allow_external_domains; /*!< Accept calls to external SIP domains? */
1191 int callevents; /*!< Whether we send manager events or not */
1192 int regextenonqualify; /*!< Whether to add/remove regexten when qualifying peers */
1193 int matchexterniplocally; /*!< Match externip/externhost setting against localnet setting */
1194 int notifyringing; /*!< Send notifications on ringing */
1195 int notifyhold; /*!< Send notifications on hold */
1196 enum notifycid_setting notifycid; /*!< Send CID with ringing notifications */
1197 enum transfermodes allowtransfer; /*!< SIP Refer restriction scheme */
1198 int allowsubscribe; /*!< Flag for disabling ALL subscriptions, this is FALSE only if all peers are FALSE
1199 the global setting is in globals_flags[1] */
1200 char realm[MAXHOSTNAMELEN]; /*!< Default realm */
1201 struct sip_proxy outboundproxy; /*!< Outbound proxy */
1202 char default_context[AST_MAX_CONTEXT];
1203 char default_subscribecontext[AST_MAX_CONTEXT];
1206 static struct sip_settings sip_cfg;
1208 static int global_match_auth_username; /*!< Match auth username if available instead of From: Default off. */
1210 static int global_relaxdtmf; /*!< Relax DTMF */
1211 static int global_rtptimeout; /*!< Time out call if no RTP */
1212 static int global_rtpholdtimeout; /*!< Time out call if no RTP during hold */
1213 static int global_rtpkeepalive; /*!< Send RTP keepalives */
1214 static int global_reg_timeout;
1215 static int global_regattempts_max; /*!< Registration attempts before giving up */
1216 static int global_callcounter; /*!< Enable call counters for all devices. This is currently enabled by setting the peer
1217 call-limit to 999. When we remove the call-limit from the code, we can make it
1218 with just a boolean flag in the device structure */
1219 static unsigned int global_tos_sip; /*!< IP type of service for SIP packets */
1220 static unsigned int global_tos_audio; /*!< IP type of service for audio RTP packets */
1221 static unsigned int global_tos_video; /*!< IP type of service for video RTP packets */
1222 static unsigned int global_tos_text; /*!< IP type of service for text RTP packets */
1223 static unsigned int global_cos_sip; /*!< 802.1p class of service for SIP packets */
1224 static unsigned int global_cos_audio; /*!< 802.1p class of service for audio RTP packets */
1225 static unsigned int global_cos_video; /*!< 802.1p class of service for video RTP packets */
1226 static unsigned int global_cos_text; /*!< 802.1p class of service for text RTP packets */
1227 static unsigned int recordhistory; /*!< Record SIP history. Off by default */
1228 static unsigned int dumphistory; /*!< Dump history to verbose before destroying SIP dialog */
1229 static char global_regcontext[AST_MAX_CONTEXT]; /*!< Context for auto-extensions */
1230 static char global_useragent[AST_MAX_EXTENSION]; /*!< Useragent for the SIP channel */
1231 static char global_sdpsession[AST_MAX_EXTENSION]; /*!< SDP session name for the SIP channel */
1232 static char global_sdpowner[AST_MAX_EXTENSION]; /*!< SDP owner name for the SIP channel */
1233 static int global_authfailureevents; /*!< Whether we send authentication failure manager events or not. Default no. */
1234 static int global_t1; /*!< T1 time */
1235 static int global_t1min; /*!< T1 roundtrip time minimum */
1236 static int global_timer_b; /*!< Timer B - RFC 3261 Section 17.1.1.2 */
1237 static unsigned int global_autoframing; /*!< Turn autoframing on or off. */
1238 static int global_qualifyfreq; /*!< Qualify frequency */
1239 static int global_qualify_gap; /*!< Time between our group of peer pokes */
1240 static int global_qualify_peers; /*!< Number of peers to poke at a given time */
1243 /*! \brief Codecs that we support by default: */
1244 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
1246 static enum st_mode global_st_mode; /*!< Mode of operation for Session-Timers */
1247 static enum st_refresher global_st_refresher; /*!< Session-Timer refresher */
1248 static int global_min_se; /*!< Lowest threshold for session refresh interval */
1249 static int global_max_se; /*!< Highest threshold for session refresh interval */
1253 /*! \brief Global list of addresses dynamic peers are not allowed to use */
1254 static struct ast_ha *global_contact_ha = NULL;
1255 static int global_dynamic_exclude_static = 0;
1257 /*! \name Object counters @{
1258 * \bug These counters are not handled in a thread-safe way ast_atomic_fetchadd_int()
1259 * should be used to modify these values. */
1260 static int speerobjs = 0; /*!< Static peers */
1261 static int rpeerobjs = 0; /*!< Realtime peers */
1262 static int apeerobjs = 0; /*!< Autocreated peer objects */
1263 static int regobjs = 0; /*!< Registry objects */
1266 static struct ast_flags global_flags[2] = {{0}}; /*!< global SIP_ flags */
1267 static char used_context[AST_MAX_CONTEXT]; /*!< name of automatically created context for unloading */
1270 AST_MUTEX_DEFINE_STATIC(netlock);
1272 /*! \brief Protect the monitoring thread, so only one process can kill or start it, and not
1273 when it's doing something critical. */
1274 AST_MUTEX_DEFINE_STATIC(monlock);
1276 AST_MUTEX_DEFINE_STATIC(sip_reload_lock);
1278 /*! \brief This is the thread for the monitor which checks for input on the channels
1279 which are not currently in use. */
1280 static pthread_t monitor_thread = AST_PTHREADT_NULL;
1282 static int sip_reloading = FALSE; /*!< Flag for avoiding multiple reloads at the same time */
1283 static enum channelreloadreason sip_reloadreason; /*!< Reason for last reload/load of configuration */
1285 static struct sched_context *sched; /*!< The scheduling context */
1286 static struct io_context *io; /*!< The IO context */
1287 static int *sipsock_read_id; /*!< ID of IO entry for sipsock FD */
1289 #define DEC_CALL_LIMIT 0
1290 #define INC_CALL_LIMIT 1
1291 #define DEC_CALL_RINGING 2
1292 #define INC_CALL_RINGING 3
1294 /*! \brief The SIP socket definition */
1296 enum sip_transport type; /*!< UDP, TCP or TLS */
1297 int fd; /*!< Filed descriptor, the actual socket */
1299 struct ast_tcptls_session_instance *tcptls_session; /* If tcp or tls, a socket manager */
1302 /*! \brief sip_request: The data grabbed from the UDP socket
1305 * Incoming messages: we first store the data from the socket in data[],
1306 * adding a trailing \0 to make string parsing routines happy.
1307 * Then call parse_request() and req.method = find_sip_method();
1308 * to initialize the other fields. The \r\n at the end of each line is
1309 * replaced by \0, so that data[] is not a conforming SIP message anymore.
1310 * After this processing, rlPart1 is set to non-NULL to remember
1311 * that we can run get_header() on this kind of packet.
1313 * parse_request() splits the first line as follows:
1314 * Requests have in the first line method uri SIP/2.0
1315 * rlPart1 = method; rlPart2 = uri;
1316 * Responses have in the first line SIP/2.0 NNN description
1317 * rlPart1 = SIP/2.0; rlPart2 = NNN + description;
1319 * For outgoing packets, we initialize the fields with init_req() or init_resp()
1320 * (which fills the first line to "METHOD uri SIP/2.0" or "SIP/2.0 code text"),
1321 * and then fill the rest with add_header() and add_line().
1322 * The \r\n at the end of the line are still there, so the get_header()
1323 * and similar functions don't work on these packets.
1326 struct sip_request {
1327 ptrdiff_t rlPart1; /*!< Offset of the SIP Method Name or "SIP/2.0" protocol version */
1328 ptrdiff_t rlPart2; /*!< Offset of the Request URI or Response Status */
1329 int len; /*!< bytes used in data[], excluding trailing null terminator. Rarely used. */
1330 int headers; /*!< # of SIP Headers */
1331 int method; /*!< Method of this request */
1332 int lines; /*!< Body Content */
1333 unsigned int sdp_start; /*!< the line number where the SDP begins */
1334 unsigned int sdp_end; /*!< the line number where the SDP ends */
1335 char debug; /*!< print extra debugging if non zero */
1336 char has_to_tag; /*!< non-zero if packet has To: tag */
1337 char ignore; /*!< if non-zero This is a re-transmit, ignore it */
1338 /* Array of offsets into the request string of each SIP header*/
1339 ptrdiff_t header[SIP_MAX_HEADERS];
1340 /* Array of offsets into the request string of each SDP line*/
1341 ptrdiff_t line[SIP_MAX_LINES];
1342 struct ast_str *data;
1343 /* XXX Do we need to unref socket.ser when the request goes away? */
1344 struct sip_socket socket; /*!< The socket used for this request */
1345 AST_LIST_ENTRY(sip_request) next;
1348 /* \brief given a sip_request and an offset, return the char * that resides there
1350 * It used to be that rlPart1, rlPart2, and the header and line arrays were character
1351 * pointers. They are now offsets into the ast_str portion of the sip_request structure.
1352 * To avoid adding a bunch of redundant pointer arithmetic to the code, this macro is
1353 * provided to retrieve the string at a particular offset within the request's buffer
1355 #define REQ_OFFSET_TO_STR(req,offset) (ast_str_buffer((req)->data) + ((req)->offset))
1357 /*! \brief structure used in transfers */
1359 struct ast_channel *chan1; /*!< First channel involved */
1360 struct ast_channel *chan2; /*!< Second channel involved */
1361 struct sip_request req; /*!< Request that caused the transfer (REFER) */
1362 int seqno; /*!< Sequence number */
1367 /*! \brief Parameters to the transmit_invite function */
1368 struct sip_invite_param {
1369 int addsipheaders; /*!< Add extra SIP headers */
1370 const char *uri_options; /*!< URI options to add to the URI */
1371 const char *vxml_url; /*!< VXML url for Cisco phones */
1372 char *auth; /*!< Authentication */
1373 char *authheader; /*!< Auth header */
1374 enum sip_auth_type auth_type; /*!< Authentication type */
1375 const char *replaces; /*!< Replaces header for call transfers */
1376 int transfer; /*!< Flag - is this Invite part of a SIP transfer? (invite/replaces) */
1379 /*! \brief Structure to save routing information for a SIP session */
1381 struct sip_route *next;
1385 /*! \brief Modes for SIP domain handling in the PBX */
1387 SIP_DOMAIN_AUTO, /*!< This domain is auto-configured */
1388 SIP_DOMAIN_CONFIG, /*!< This domain is from configuration */
1391 /*! \brief Domain data structure.
1392 \note In the future, we will connect this to a configuration tree specific
1396 char domain[MAXHOSTNAMELEN]; /*!< SIP domain we are responsible for */
1397 char context[AST_MAX_EXTENSION]; /*!< Incoming context for this domain */
1398 enum domain_mode mode; /*!< How did we find this domain? */
1399 AST_LIST_ENTRY(domain) list; /*!< List mechanics */
1402 static AST_LIST_HEAD_STATIC(domain_list, domain); /*!< The SIP domain list */
1405 /*! \brief sip_history: Structure for saving transactions within a SIP dialog */
1406 struct sip_history {
1407 AST_LIST_ENTRY(sip_history) list;
1408 char event[0]; /* actually more, depending on needs */
1411 AST_LIST_HEAD_NOLOCK(sip_history_head, sip_history); /*!< history list, entry in sip_pvt */
1413 /*! \brief sip_auth: Credentials for authentication to other SIP services */
1415 char realm[AST_MAX_EXTENSION]; /*!< Realm in which these credentials are valid */
1416 char username[256]; /*!< Username */
1417 char secret[256]; /*!< Secret */
1418 char md5secret[256]; /*!< MD5Secret */
1419 struct sip_auth *next; /*!< Next auth structure in list */
1423 Various flags for the flags field in the pvt structure
1424 Trying to sort these up (one or more of the following):
1428 When flags are used by multiple structures, it is important that
1429 they have a common layout so it is easy to copy them.
1432 #define SIP_OUTGOING (1 << 0) /*!< D: Direction of the last transaction in this dialog */
1433 #define SIP_RINGING (1 << 2) /*!< D: Have sent 180 ringing */
1434 #define SIP_PROGRESS_SENT (1 << 3) /*!< D: Have sent 183 message progress */
1435 #define SIP_NEEDREINVITE (1 << 4) /*!< D: Do we need to send another reinvite? */
1436 #define SIP_PENDINGBYE (1 << 5) /*!< D: Need to send bye after we ack? */
1437 #define SIP_GOTREFER (1 << 6) /*!< D: Got a refer? */
1438 #define SIP_CALL_LIMIT (1 << 7) /*!< D: Call limit enforced for this call */
1439 #define SIP_INC_COUNT (1 << 8) /*!< D: Did this dialog increment the counter of in-use calls? */
1440 #define SIP_INC_RINGING (1 << 9) /*!< D: Did this connection increment the counter of in-use calls? */
1441 #define SIP_DEFER_BYE_ON_TRANSFER (1 << 10) /*!< D: Do not hangup at first ast_hangup */
1443 #define SIP_PROMISCREDIR (1 << 11) /*!< DP: Promiscuous redirection */
1444 #define SIP_TRUSTRPID (1 << 12) /*!< DP: Trust RPID headers? */
1445 #define SIP_USEREQPHONE (1 << 13) /*!< DP: Add user=phone to numeric URI. Default off */
1446 #define SIP_USECLIENTCODE (1 << 14) /*!< DP: Trust X-ClientCode info message */
1448 /* DTMF flags - see str2dtmfmode() and dtmfmode2str() */
1449 #define SIP_DTMF (7 << 15) /*!< DP: DTMF Support: five settings, uses three bits */
1450 #define SIP_DTMF_RFC2833 (0 << 15) /*!< DP: DTMF Support: RTP DTMF - "rfc2833" */
1451 #define SIP_DTMF_INBAND (1 << 15) /*!< DP: DTMF Support: Inband audio, only for ULAW/ALAW - "inband" */
1452 #define SIP_DTMF_INFO (2 << 15) /*!< DP: DTMF Support: SIP Info messages - "info" */
1453 #define SIP_DTMF_AUTO (3 << 15) /*!< DP: DTMF Support: AUTO switch between rfc2833 and in-band DTMF */
1454 #define SIP_DTMF_SHORTINFO (4 << 15) /*!< DP: DTMF Support: SIP Info messages - "info" - short variant */
1457 #define SIP_NAT_FORCE_RPORT (1 << 18) /*!< DP: Force rport even if not present in the request */
1458 #define SIP_NAT_RPORT_PRESENT (1 << 19) /*!< DP: rport was present in the request */
1460 /* re-INVITE related settings */
1461 #define SIP_REINVITE (7 << 20) /*!< DP: four settings, uses three bits */
1462 #define SIP_REINVITE_NONE (0 << 20) /*!< DP: no reinvite allowed */
1463 #define SIP_CAN_REINVITE (1 << 20) /*!< DP: allow peers to be reinvited to send media directly p2p */
1464 #define SIP_CAN_REINVITE_NAT (2 << 20) /*!< DP: allow media reinvite when new peer is behind NAT */
1465 #define SIP_REINVITE_UPDATE (4 << 20) /*!< DP: use UPDATE (RFC3311) when reinviting this peer */
1467 /* "insecure" settings - see insecure2str() */
1468 #define SIP_INSECURE (3 << 23) /*!< DP: three settings, uses two bits */
1469 #define SIP_INSECURE_NONE (0 << 23) /*!< DP: secure mode */
1470 #define SIP_INSECURE_PORT (1 << 23) /*!< DP: don't require matching port for incoming requests */
1471 #define SIP_INSECURE_INVITE (1 << 24) /*!< DP: don't require authentication for incoming INVITEs */
1473 /* Sending PROGRESS in-band settings */
1474 #define SIP_PROG_INBAND (3 << 25) /*!< DP: three settings, uses two bits */
1475 #define SIP_PROG_INBAND_NEVER (0 << 25)
1476 #define SIP_PROG_INBAND_NO (1 << 25)
1477 #define SIP_PROG_INBAND_YES (2 << 25)
1479 #define SIP_SENDRPID (3 << 29) /*!< DP: Remote Party-ID Support */
1480 #define SIP_SENDRPID_NO (0 << 29)
1481 #define SIP_SENDRPID_PAI (1 << 29) /*!< Use "P-Asserted-Identity" for rpid */
1482 #define SIP_SENDRPID_RPID (2 << 29) /*!< Use "Remote-Party-ID" for rpid */
1483 #define SIP_G726_NONSTANDARD (1 << 31) /*!< DP: Use non-standard packing for G726-32 data */
1485 /*! \brief Flags to copy from peer/user to dialog */
1486 #define SIP_FLAGS_TO_COPY \
1487 (SIP_PROMISCREDIR | SIP_TRUSTRPID | SIP_SENDRPID | SIP_DTMF | SIP_REINVITE | \
1488 SIP_PROG_INBAND | SIP_USECLIENTCODE | SIP_NAT_FORCE_RPORT | SIP_G726_NONSTANDARD | \
1489 SIP_USEREQPHONE | SIP_INSECURE)
1493 a second page of flags (for flags[1] */
1495 /* realtime flags */
1496 #define SIP_PAGE2_RTCACHEFRIENDS (1 << 0) /*!< GP: Should we keep RT objects in memory for extended time? */
1497 #define SIP_PAGE2_RTAUTOCLEAR (1 << 2) /*!< GP: Should we clean memory from peers after expiry? */
1498 #define SIP_PAGE2_RPID_UPDATE (1 << 3)
1499 /* Space for addition of other realtime flags in the future */
1500 #define SIP_PAGE2_SYMMETRICRTP (1 << 8) /*!< GDP: Whether symmetric RTP is enabled or not */
1501 #define SIP_PAGE2_STATECHANGEQUEUE (1 << 9) /*!< D: Unsent state pending change exists */
1503 #define SIP_PAGE2_CONNECTLINEUPDATE_PEND (1 << 10)
1504 #define SIP_PAGE2_RPID_IMMEDIATE (1 << 11)
1505 #define SIP_PAGE2_RPORT_PRESENT (1 << 12) /*!< Was rport received in the Via header? */
1506 #define SIP_PAGE2_PREFERRED_CODEC (1 << 13) /*!< GDP: Only respond with single most preferred joint codec */
1507 #define SIP_PAGE2_VIDEOSUPPORT (1 << 14) /*!< DP: Video supported if offered? */
1508 #define SIP_PAGE2_TEXTSUPPORT (1 << 15) /*!< GDP: Global text enable */
1509 #define SIP_PAGE2_ALLOWSUBSCRIBE (1 << 16) /*!< GP: Allow subscriptions from this peer? */
1510 #define SIP_PAGE2_ALLOWOVERLAP (1 << 17) /*!< DP: Allow overlap dialing ? */
1511 #define SIP_PAGE2_SUBSCRIBEMWIONLY (1 << 18) /*!< GP: Only issue MWI notification if subscribed to */
1512 #define SIP_PAGE2_IGNORESDPVERSION (1 << 19) /*!< GDP: Ignore the SDP session version number we receive and treat all sessions as new */
1514 #define SIP_PAGE2_T38SUPPORT (7 << 20) /*!< GDP: T38 Fax Passthrough Support */
1515 #define SIP_PAGE2_T38SUPPORT_UDPTL (1 << 20) /*!< GDP: T38 Fax Passthrough Support (no error correction) */
1516 #define SIP_PAGE2_T38SUPPORT_UDPTL_FEC (2 << 20) /*!< GDP: T38 Fax Passthrough Support (FEC error correction) */
1517 #define SIP_PAGE2_T38SUPPORT_UDPTL_REDUNDANCY (4 << 20) /*!< GDP: T38 Fax Passthrough Support (redundancy error correction) */
1519 #define SIP_PAGE2_CALL_ONHOLD (3 << 23) /*!< D: Call hold states: */
1520 #define SIP_PAGE2_CALL_ONHOLD_ACTIVE (1 << 23) /*!< D: Active hold */
1521 #define SIP_PAGE2_CALL_ONHOLD_ONEDIR (2 << 23) /*!< D: One directional hold */
1522 #define SIP_PAGE2_CALL_ONHOLD_INACTIVE (3 << 23) /*!< D: Inactive hold */
1524 #define SIP_PAGE2_RFC2833_COMPENSATE (1 << 25) /*!< DP: Compensate for buggy RFC2833 implementations */
1525 #define SIP_PAGE2_BUGGY_MWI (1 << 26) /*!< DP: Buggy CISCO MWI fix */
1526 #define SIP_PAGE2_DIALOG_ESTABLISHED (1 << 27) /*!< 29: Has a dialog been established? */
1527 #define SIP_PAGE2_FAX_DETECT (1 << 28) /*!< DP: Fax Detection support */
1528 #define SIP_PAGE2_REGISTERTRYING (1 << 29) /*!< DP: Send 100 Trying on REGISTER attempts */
1529 #define SIP_PAGE2_UDPTL_DESTINATION (1 << 30) /*!< DP: Use source IP of RTP as destination if NAT is enabled */
1530 #define SIP_PAGE2_VIDEOSUPPORT_ALWAYS (1 << 31) /*!< DP: Always set up video, even if endpoints don't support it */
1532 #define SIP_PAGE2_FLAGS_TO_COPY \
1533 (SIP_PAGE2_ALLOWSUBSCRIBE | SIP_PAGE2_ALLOWOVERLAP | SIP_PAGE2_IGNORESDPVERSION | \
1534 SIP_PAGE2_VIDEOSUPPORT | SIP_PAGE2_T38SUPPORT | SIP_PAGE2_RFC2833_COMPENSATE | \
1535 SIP_PAGE2_BUGGY_MWI | SIP_PAGE2_TEXTSUPPORT | SIP_PAGE2_FAX_DETECT | \
1536 SIP_PAGE2_UDPTL_DESTINATION | SIP_PAGE2_VIDEOSUPPORT_ALWAYS | SIP_PAGE2_PREFERRED_CODEC | \
1537 SIP_PAGE2_RPID_IMMEDIATE | SIP_PAGE2_RPID_UPDATE | SIP_PAGE2_SYMMETRICRTP)
1541 /*! \name SIPflagsT38
1542 T.38 set of flags */
1545 #define T38FAX_FILL_BIT_REMOVAL (1 << 0) /*!< Default: 0 (unset)*/
1546 #define T38FAX_TRANSCODING_MMR (1 << 1) /*!< Default: 0 (unset)*/
1547 #define T38FAX_TRANSCODING_JBIG (1 << 2) /*!< Default: 0 (unset)*/
1548 /* Rate management */
1549 #define T38FAX_RATE_MANAGEMENT_TRANSFERRED_TCF (0 << 3)
1550 #define T38FAX_RATE_MANAGEMENT_LOCAL_TCF (1 << 3) /*!< Unset for transferredTCF (UDPTL), set for localTCF (TPKT) */
1551 /* UDP Error correction */
1552 #define T38FAX_UDP_EC_NONE (0 << 4) /*!< two bits, if unset NO t38UDPEC field in T38 SDP*/
1553 #define T38FAX_UDP_EC_FEC (1 << 4) /*!< Set for t38UDPFEC */
1554 #define T38FAX_UDP_EC_REDUNDANCY (2 << 4) /*!< Set for t38UDPRedundancy */
1555 /* T38 Spec version */
1556 #define T38FAX_VERSION (3 << 6) /*!< two bits, 2 values so far, up to 4 values max */
1557 #define T38FAX_VERSION_0 (0 << 6) /*!< Version 0 */
1558 #define T38FAX_VERSION_1 (1 << 6) /*!< Version 1 */
1559 /* Maximum Fax Rate */
1560 #define T38FAX_RATE_2400 (1 << 8) /*!< 2400 bps t38FaxRate */
1561 #define T38FAX_RATE_4800 (1 << 9) /*!< 4800 bps t38FaxRate */
1562 #define T38FAX_RATE_7200 (1 << 10) /*!< 7200 bps t38FaxRate */
1563 #define T38FAX_RATE_9600 (1 << 11) /*!< 9600 bps t38FaxRate */
1564 #define T38FAX_RATE_12000 (1 << 12) /*!< 12000 bps t38FaxRate */
1565 #define T38FAX_RATE_14400 (1 << 13) /*!< 14400 bps t38FaxRate */
1567 /*!< This is default: NO MMR and JBIG transcoding, NO fill bit removal, transferredTCF TCF, UDP FEC, Version 0 and 9600 max fax rate */
1568 static int global_t38_capability = T38FAX_VERSION_0 | T38FAX_RATE_2400 | T38FAX_RATE_4800 | T38FAX_RATE_7200 | T38FAX_RATE_9600;
1571 /*! \brief debugging state
1572 * We store separately the debugging requests from the config file
1573 * and requests from the CLI. Debugging is enabled if either is set
1574 * (which means that if sipdebug is set in the config file, we can
1575 * only turn it off by reloading the config).
1579 sip_debug_config = 1,
1580 sip_debug_console = 2,
1583 static enum sip_debug_e sipdebug;
1585 /*! \brief extra debugging for 'text' related events.
1586 * At the moment this is set together with sip_debug_console.
1587 * \note It should either go away or be implemented properly.
1589 static int sipdebug_text;
1591 /*! \brief T38 States for a call */
1593 T38_DISABLED = 0, /*!< Not enabled */
1594 T38_LOCAL_REINVITE, /*!< Offered from local - REINVITE */
1595 T38_PEER_REINVITE, /*!< Offered from peer - REINVITE */
1596 T38_ENABLED /*!< Negotiated (enabled) */
1599 /*! \brief T.38 channel settings (at some point we need to make this alloc'ed */
1600 struct t38properties {
1601 struct ast_flags t38support; /*!< Flag for udptl, rtp or tcp support for this session */
1602 int capability; /*!< Our T38 capability */
1603 int peercapability; /*!< Peers T38 capability */
1604 int jointcapability; /*!< Supported T38 capability at both ends */
1605 enum t38state state; /*!< T.38 state */
1608 /*! \brief Parameters to know status of transfer */
1610 REFER_IDLE, /*!< No REFER is in progress */
1611 REFER_SENT, /*!< Sent REFER to transferee */
1612 REFER_RECEIVED, /*!< Received REFER from transferrer */
1613 REFER_CONFIRMED, /*!< Refer confirmed with a 100 TRYING (unused) */
1614 REFER_ACCEPTED, /*!< Accepted by transferee */
1615 REFER_RINGING, /*!< Target Ringing */
1616 REFER_200OK, /*!< Answered by transfer target */
1617 REFER_FAILED, /*!< REFER declined - go on */
1618 REFER_NOAUTH /*!< We had no auth for REFER */
1621 /*! \brief generic struct to map between strings and integers.
1622 * Fill it with x-s pairs, terminate with an entry with s = NULL;
1623 * Then you can call map_x_s(...) to map an integer to a string,
1624 * and map_s_x() for the string -> integer mapping.
1631 static const struct _map_x_s referstatusstrings[] = {
1632 { REFER_IDLE, "<none>" },
1633 { REFER_SENT, "Request sent" },
1634 { REFER_RECEIVED, "Request received" },
1635 { REFER_CONFIRMED, "Confirmed" },
1636 { REFER_ACCEPTED, "Accepted" },
1637 { REFER_RINGING, "Target ringing" },
1638 { REFER_200OK, "Done" },
1639 { REFER_FAILED, "Failed" },
1640 { REFER_NOAUTH, "Failed - auth failure" },
1641 { -1, NULL} /* terminator */
1644 /*! \brief Structure to handle SIP transfers. Dynamically allocated when needed
1645 \note OEJ: Should be moved to string fields */
1647 char refer_to[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO extension */
1648 char refer_to_domain[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO domain */
1649 char refer_to_urioption[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO uri options */
1650 char refer_to_context[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO context */
1651 char referred_by[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
1652 char referred_by_name[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
1653 char refer_contact[AST_MAX_EXTENSION]; /*!< Place to store Contact info from a REFER extension */
1654 char replaces_callid[SIPBUFSIZE]; /*!< Replace info: callid */
1655 char replaces_callid_totag[SIPBUFSIZE/2]; /*!< Replace info: to-tag */
1656 char replaces_callid_fromtag[SIPBUFSIZE/2]; /*!< Replace info: from-tag */
1657 struct sip_pvt *refer_call; /*!< Call we are referring. This is just a reference to a
1658 * dialog owned by someone else, so we should not destroy
1659 * it when the sip_refer object goes.
1661 int attendedtransfer; /*!< Attended or blind transfer? */
1662 int localtransfer; /*!< Transfer to local domain? */
1663 enum referstatus status; /*!< REFER status */
1667 /*! \brief Structure that encapsulates all attributes related to running
1668 * SIP Session-Timers feature on a per dialog basis.
1671 int st_active; /*!< Session-Timers on/off */
1672 int st_interval; /*!< Session-Timers negotiated session refresh interval */
1673 int st_schedid; /*!< Session-Timers ast_sched scheduler id */
1674 enum st_refresher st_ref; /*!< Session-Timers session refresher */
1675 int st_expirys; /*!< Session-Timers number of expirys */
1676 int st_active_peer_ua; /*!< Session-Timers on/off in peer UA */
1677 int st_cached_min_se; /*!< Session-Timers cached Min-SE */
1678 int st_cached_max_se; /*!< Session-Timers cached Session-Expires */
1679 enum st_mode st_cached_mode; /*!< Session-Timers cached M.O. */
1680 enum st_refresher st_cached_ref; /*!< Session-Timers cached refresher */
1684 /*! \brief Structure that encapsulates all attributes related to configuration
1685 * of SIP Session-Timers feature on a per user/peer basis.
1688 enum st_mode st_mode_oper; /*!< Mode of operation for Session-Timers */
1689 enum st_refresher st_ref; /*!< Session-Timer refresher */
1690 int st_min_se; /*!< Lowest threshold for session refresh interval */
1691 int st_max_se; /*!< Highest threshold for session refresh interval */
1694 struct offered_media {
1699 /*! \brief Structure used for each SIP dialog, ie. a call, a registration, a subscribe.
1700 * Created and initialized by sip_alloc(), the descriptor goes into the list of
1701 * descriptors (dialoglist).
1704 struct sip_pvt *next; /*!< Next dialog in chain */
1705 enum invitestates invitestate; /*!< Track state of SIP_INVITEs */
1706 int method; /*!< SIP method that opened this dialog */
1707 AST_DECLARE_STRING_FIELDS(
1708 AST_STRING_FIELD(callid); /*!< Global CallID */
1709 AST_STRING_FIELD(randdata); /*!< Random data */
1710 AST_STRING_FIELD(accountcode); /*!< Account code */
1711 AST_STRING_FIELD(realm); /*!< Authorization realm */
1712 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
1713 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
1714 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
1715 AST_STRING_FIELD(domain); /*!< Authorization domain */
1716 AST_STRING_FIELD(from); /*!< The From: header */
1717 AST_STRING_FIELD(useragent); /*!< User agent in SIP request */
1718 AST_STRING_FIELD(exten); /*!< Extension where to start */
1719 AST_STRING_FIELD(context); /*!< Context for this call */
1720 AST_STRING_FIELD(subscribecontext); /*!< Subscribecontext */
1721 AST_STRING_FIELD(subscribeuri); /*!< Subscribecontext */
1722 AST_STRING_FIELD(fromdomain); /*!< Domain to show in the from field */
1723 AST_STRING_FIELD(fromuser); /*!< User to show in the user field */
1724 AST_STRING_FIELD(fromname); /*!< Name to show in the user field */
1725 AST_STRING_FIELD(tohost); /*!< Host we should put in the "to" field */
1726 AST_STRING_FIELD(todnid); /*!< DNID of this call (overrides host) */
1727 AST_STRING_FIELD(language); /*!< Default language for this call */
1728 AST_STRING_FIELD(mohinterpret); /*!< MOH class to use when put on hold */
1729 AST_STRING_FIELD(mohsuggest); /*!< MOH class to suggest when putting a peer on hold */
1730 AST_STRING_FIELD(rdnis); /*!< Referring DNIS */
1731 AST_STRING_FIELD(redircause); /*!< Referring cause */
1732 AST_STRING_FIELD(theirtag); /*!< Their tag */
1733 AST_STRING_FIELD(username); /*!< [user] name */
1734 AST_STRING_FIELD(peername); /*!< [peer] name, not set if [user] */
1735 AST_STRING_FIELD(authname); /*!< Who we use for authentication */
1736 AST_STRING_FIELD(uri); /*!< Original requested URI */
1737 AST_STRING_FIELD(okcontacturi); /*!< URI from the 200 OK on INVITE */
1738 AST_STRING_FIELD(peersecret); /*!< Password */
1739 AST_STRING_FIELD(peermd5secret);
1740 AST_STRING_FIELD(cid_num); /*!< Caller*ID number */
1741 AST_STRING_FIELD(cid_name); /*!< Caller*ID name */
1742 AST_STRING_FIELD(mwi_from); /*!< Name to place in the From header in outgoing NOTIFY requests */
1743 AST_STRING_FIELD(fullcontact); /*!< The Contact: that the UA registers with us */
1744 /* we only store the part in <brackets> in this field. */
1745 AST_STRING_FIELD(our_contact); /*!< Our contact header */
1746 AST_STRING_FIELD(url); /*!< URL to be sent with next message to peer */
1747 AST_STRING_FIELD(parkinglot); /*!< Parkinglot */
1748 AST_STRING_FIELD(engine); /*!< RTP engine to use */
1750 char via[128]; /*!< Via: header */
1751 struct sip_socket socket; /*!< The socket used for this dialog */
1752 unsigned int ocseq; /*!< Current outgoing seqno */
1753 unsigned int icseq; /*!< Current incoming seqno */
1754 ast_group_t callgroup; /*!< Call group */
1755 ast_group_t pickupgroup; /*!< Pickup group */
1756 int lastinvite; /*!< Last Cseq of invite */
1757 struct ast_flags flags[2]; /*!< SIP_ flags */
1759 /* boolean flags that don't belong in flags */
1760 unsigned short do_history:1; /*!< Set if we want to record history */
1761 unsigned short alreadygone:1; /*!< already destroyed by our peer */
1762 unsigned short needdestroy:1; /*!< need to be destroyed by the monitor thread */
1763 unsigned short outgoing_call:1; /*!< this is an outgoing call */
1764 unsigned short answered_elsewhere:1; /*!< This call is cancelled due to answer on another channel */
1765 unsigned short novideo:1; /*!< Didn't get video in invite, don't offer */
1766 unsigned short notext:1; /*!< Text not supported (?) */
1767 unsigned short session_modify:1; /*!< Session modification request true/false */
1768 unsigned short route_persistent:1; /*!< Is this the "real" route? */
1769 unsigned short autoframing:1; /*!< Whether to use our local configuration for frame sizes (off)
1770 * or respect the other endpoint's request for frame sizes (on)
1771 * for incoming calls
1773 char tag[11]; /*!< Our tag for this session */
1774 int timer_t1; /*!< SIP timer T1, ms rtt */
1775 int timer_b; /*!< SIP timer B, ms */
1776 unsigned int sipoptions; /*!< Supported SIP options on the other end */
1777 unsigned int reqsipoptions; /*!< Required SIP options on the other end */
1778 struct ast_codec_pref prefs; /*!< codec prefs */
1779 int capability; /*!< Special capability (codec) */
1780 int jointcapability; /*!< Supported capability at both ends (codecs) */
1781 int peercapability; /*!< Supported peer capability */
1782 int prefcodec; /*!< Preferred codec (outbound only) */
1783 int noncodeccapability; /*!< DTMF RFC2833 telephony-event */
1784 int jointnoncodeccapability; /*!< Joint Non codec capability */
1785 int redircodecs; /*!< Redirect codecs */
1786 int maxcallbitrate; /*!< Maximum Call Bitrate for Video Calls */
1787 int request_queue_sched_id; /*!< Scheduler ID of any scheduled action to process queued requests */
1788 int authtries; /*!< Times we've tried to authenticate */
1789 struct sip_proxy *outboundproxy; /*!< Outbound proxy for this dialog. Use ref_proxy to set this instead of setting it directly*/
1790 struct t38properties t38; /*!< T38 settings */
1791 struct sockaddr_in udptlredirip; /*!< Where our T.38 UDPTL should be going if not to us */
1792 struct ast_udptl *udptl; /*!< T.38 UDPTL session */
1793 int callingpres; /*!< Calling presentation */
1794 int expiry; /*!< How long we take to expire */
1795 int sessionversion; /*!< SDP Session Version */
1796 int sessionid; /*!< SDP Session ID */
1797 long branch; /*!< The branch identifier of this session */
1798 long invite_branch; /*!< The branch used when we sent the initial INVITE */
1799 int64_t sessionversion_remote; /*!< Remote UA's SDP Session Version */
1800 struct sockaddr_in sa; /*!< Our peer */
1801 struct sockaddr_in redirip; /*!< Where our RTP should be going if not to us */
1802 struct sockaddr_in vredirip; /*!< Where our Video RTP should be going if not to us */
1803 struct sockaddr_in tredirip; /*!< Where our Text RTP should be going if not to us */
1804 time_t lastrtprx; /*!< Last RTP received */
1805 time_t lastrtptx; /*!< Last RTP sent */
1806 int rtptimeout; /*!< RTP timeout time */
1807 struct sockaddr_in recv; /*!< Received as */
1808 struct sockaddr_in ourip; /*!< Our IP (as seen from the outside) */
1809 enum transfermodes allowtransfer; /*!< REFER: restriction scheme */
1810 struct ast_channel *owner; /*!< Who owns us (if we have an owner) */
1811 struct sip_route *route; /*!< Head of linked list of routing steps (fm Record-Route) */
1812 struct ast_variable *notify_headers; /*!< Custom notify type */
1813 struct sip_auth *peerauth; /*!< Realm authentication */
1814 int noncecount; /*!< Nonce-count */
1815 unsigned int stalenonce:1; /*!< Marks the current nonce as responded too */
1816 char lastmsg[256]; /*!< Last Message sent/received */
1817 int amaflags; /*!< AMA Flags */
1818 int pendinginvite; /*!< Any pending INVITE or state NOTIFY (in subscribe pvt's) ? (seqno of this) */
1819 int glareinvite; /*!< A invite received while a pending invite is already present is stored here. Its seqno is the
1820 value. Since this glare invite's seqno is not the same as the pending invite's, it must be
1821 held in order to properly process acknowledgements for our 491 response. */
1822 struct sip_request initreq; /*!< Latest request that opened a new transaction
1824 NOT the request that opened the dialog */
1826 int initid; /*!< Auto-congest ID if appropriate (scheduler) */
1827 int waitid; /*!< Wait ID for scheduler after 491 or other delays */
1828 int autokillid; /*!< Auto-kill ID (scheduler) */
1829 int t38id; /*!< T.38 Response ID */
1830 struct sip_refer *refer; /*!< REFER: SIP transfer data structure */
1831 enum subscriptiontype subscribed; /*!< SUBSCRIBE: Is this dialog a subscription? */
1832 int stateid; /*!< SUBSCRIBE: ID for devicestate subscriptions */
1833 int laststate; /*!< SUBSCRIBE: Last known extension state */
1834 int dialogver; /*!< SUBSCRIBE: Version for subscription dialog-info */
1836 struct ast_dsp *dsp; /*!< Inband DTMF Detection dsp */
1838 struct sip_peer *relatedpeer; /*!< If this dialog is related to a peer, which one
1839 Used in peerpoke, mwi subscriptions */
1840 struct sip_registry *registry; /*!< If this is a REGISTER dialog, to which registry */
1841 struct ast_rtp_instance *rtp; /*!< RTP Session */
1842 struct ast_rtp_instance *vrtp; /*!< Video RTP session */
1843 struct ast_rtp_instance *trtp; /*!< Text RTP session */
1844 struct sip_pkt *packets; /*!< Packets scheduled for re-transmission */
1845 struct sip_history_head *history; /*!< History of this SIP dialog */
1846 size_t history_entries; /*!< Number of entires in the history */
1847 struct ast_variable *chanvars; /*!< Channel variables to set for inbound call */
1848 AST_LIST_HEAD_NOLOCK(request_queue, sip_request) request_queue; /*!< Requests that arrived but could not be processed immediately */
1849 struct sip_invite_param *options; /*!< Options for INVITE */
1850 struct sip_st_dlg *stimer; /*!< SIP Session-Timers */
1852 int red; /*!< T.140 RTP Redundancy */
1853 int hangupcause; /*!< Storage of hangupcause copied from our owner before we disconnect from the AST channel (only used at hangup) */
1855 struct sip_subscription_mwi *mwi; /*!< If this is a subscription MWI dialog, to which subscription */
1856 /*! The SIP methods allowed on this dialog. We get this information from the Allow header present in
1857 * the peer's REGISTER. If peer does not register with us, then we will use the first transaction we
1858 * have with this peer to determine its allowed methods.
1860 unsigned int allowed_methods;
1861 /*! When receiving an SDP offer, it is important to take note of what media types were offered.
1862 * By doing this, even if we don't want to answer a particular media stream with something meaningful, we can
1863 * still put an m= line in our answer with the port set to 0.
1865 * The reason for the length being 4 is that in this branch of Asterisk, the only media types supported are
1866 * image, audio, text, and video. Therefore we need to keep track of which types of media were offered.
1868 * Note that if we wanted to be 100% correct, we would keep a list of all media streams offered. That way we could respond
1869 * even to unknown media types, and we could respond to multiple streams of the same type. Such large-scale changes
1870 * are not a good idea for released branches, though, so we're compromising by just making sure that for the common cases:
1871 * audio and video, audio and T.38, and audio and text, we give the appropriate response to both media streams.
1873 * The large-scale changes would be a good idea for implementing during an SDP rewrite.
1875 struct offered_media offered_media[4];
1880 * Here we implement the container for dialogs (sip_pvt), defining
1881 * generic wrapper functions to ease the transition from the current
1882 * implementation (a single linked list) to a different container.
1883 * In addition to a reference to the container, we need functions to lock/unlock
1884 * the container and individual items, and functions to add/remove
1885 * references to the individual items.
1887 static struct ao2_container *dialogs;
1889 #define sip_pvt_lock(x) ao2_lock(x)
1890 #define sip_pvt_trylock(x) ao2_trylock(x)
1891 #define sip_pvt_unlock(x) ao2_unlock(x)
1894 * when we create or delete references, make sure to use these
1895 * functions so we keep track of the refcounts.
1896 * To simplify the code, we allow a NULL to be passed to dialog_unref().
1899 #define dialog_ref(arg1,arg2) dialog_ref_debug((arg1),(arg2), __FILE__, __LINE__, __PRETTY_FUNCTION__)
1900 #define dialog_unref(arg1,arg2) dialog_unref_debug((arg1),(arg2), __FILE__, __LINE__, __PRETTY_FUNCTION__)
1902 static struct sip_pvt *dialog_ref_debug(struct sip_pvt *p, char *tag, char *file, int line, const char *func)
1905 _ao2_ref_debug(p, 1, tag, file, line, func);
1907 ast_log(LOG_ERROR, "Attempt to Ref a null pointer\n");
1911 static struct sip_pvt *dialog_unref_debug(struct sip_pvt *p, char *tag, char *file, int line, const char *func)
1914 _ao2_ref_debug(p, -1, tag, file, line, func);
1918 static struct sip_pvt *dialog_ref(struct sip_pvt *p, char *tag)
1923 ast_log(LOG_ERROR, "Attempt to Ref a null pointer\n");
1927 static struct sip_pvt *dialog_unref(struct sip_pvt *p, char *tag)
1935 /*! \brief sip packet - raw format for outbound packets that are sent or scheduled for transmission
1936 * Packets are linked in a list, whose head is in the struct sip_pvt they belong to.
1937 * Each packet holds a reference to the parent struct sip_pvt.
1938 * This structure is allocated in __sip_reliable_xmit() and only for packets that
1939 * require retransmissions.
1942 struct sip_pkt *next; /*!< Next packet in linked list */
1943 int retrans; /*!< Retransmission number */
1944 int method; /*!< SIP method for this packet */
1945 int seqno; /*!< Sequence number */
1946 char is_resp; /*!< 1 if this is a response packet (e.g. 200 OK), 0 if it is a request */
1947 char is_fatal; /*!< non-zero if there is a fatal error */
1948 int response_code; /*!< If this is a response, the response code */
1949 struct sip_pvt *owner; /*!< Owner AST call */
1950 int retransid; /*!< Retransmission ID */
1951 int timer_a; /*!< SIP timer A, retransmission timer */
1952 int timer_t1; /*!< SIP Timer T1, estimated RTT or 500 ms */
1953 int packetlen; /*!< Length of packet */
1954 struct ast_str *data;
1958 * \brief A peer's mailbox
1960 * We could use STRINGFIELDS here, but for only two strings, it seems like
1961 * too much effort ...
1963 struct sip_mailbox {
1966 /*! Associated MWI subscription */
1967 struct ast_event_sub *event_sub;
1968 AST_LIST_ENTRY(sip_mailbox) entry;
1971 enum sip_peer_type {
1972 SIP_TYPE_PEER = (1 << 0),
1973 SIP_TYPE_USER = (1 << 1),
1976 /*! \brief Structure for SIP peer data, we place calls to peers if registered or fixed IP address (host)
1978 /* XXX field 'name' must be first otherwise sip_addrcmp() will fail, as will astobj2 hashing of the structure */
1980 char name[80]; /*!< the unique name of this object */
1981 AST_DECLARE_STRING_FIELDS(
1982 AST_STRING_FIELD(secret); /*!< Password for inbound auth */
1983 AST_STRING_FIELD(md5secret); /*!< Password in MD5 */
1984 AST_STRING_FIELD(remotesecret); /*!< Remote secret (trunks, remote devices) */
1985 AST_STRING_FIELD(context); /*!< Default context for incoming calls */
1986 AST_STRING_FIELD(subscribecontext); /*!< Default context for subscriptions */
1987 AST_STRING_FIELD(username); /*!< Temporary username until registration */
1988 AST_STRING_FIELD(accountcode); /*!< Account code */
1989 AST_STRING_FIELD(tohost); /*!< If not dynamic, IP address */
1990 AST_STRING_FIELD(regexten); /*!< Extension to register (if regcontext is used) */
1991 AST_STRING_FIELD(fromuser); /*!< From: user when calling this peer */
1992 AST_STRING_FIELD(fromdomain); /*!< From: domain when calling this peer */
1993 AST_STRING_FIELD(fullcontact); /*!< Contact registered with us (not in sip.conf) */
1994 AST_STRING_FIELD(cid_num); /*!< Caller ID num */
1995 AST_STRING_FIELD(cid_name); /*!< Caller ID name */
1996 AST_STRING_FIELD(vmexten); /*!< Dialplan extension for MWI notify message*/
1997 AST_STRING_FIELD(language); /*!< Default language for prompts */
1998 AST_STRING_FIELD(mohinterpret); /*!< Music on Hold class */
1999 AST_STRING_FIELD(mohsuggest); /*!< Music on Hold class */
2000 AST_STRING_FIELD(parkinglot); /*!< Parkinglot */
2001 AST_STRING_FIELD(useragent); /*!< User agent in SIP request (saved from registration) */
2002 AST_STRING_FIELD(mwi_from); /*!< Name to place in From header for outgoing NOTIFY requests */
2003 AST_STRING_FIELD(engine); /*!< RTP Engine to use */
2005 struct sip_socket socket; /*!< Socket used for this peer */
2006 enum sip_transport default_outbound_transport; /*!< Peer Registration may change the default outbound transport.
2007 If register expires, default should be reset. to this value */
2008 /* things that don't belong in flags */
2009 unsigned short transports:3; /*!< Transports (enum sip_transport) that are acceptable for this peer */
2010 unsigned short is_realtime:1; /*!< this is a 'realtime' peer */
2011 unsigned short rt_fromcontact:1;/*!< copy fromcontact from realtime */
2012 unsigned short host_dynamic:1; /*!< Dynamic Peers register with Asterisk */
2013 unsigned short selfdestruct:1; /*!< Automatic peers need to destruct themselves */
2014 unsigned short the_mark:1; /*!< moved out of ASTOBJ into struct proper; That which bears the_mark should be deleted! */
2015 unsigned short autoframing:1; /*!< Whether to use our local configuration for frame sizes (off)
2016 * or respect the other endpoint's request for frame sizes (on)
2017 * for incoming calls
2019 struct sip_auth *auth; /*!< Realm authentication list */
2020 int amaflags; /*!< AMA Flags (for billing) */
2021 int callingpres; /*!< Calling id presentation */
2022 int inUse; /*!< Number of calls in use */
2023 int inRinging; /*!< Number of calls ringing */
2024 int onHold; /*!< Peer has someone on hold */
2025 int call_limit; /*!< Limit of concurrent calls */
2026 int busy_level; /*!< Level of active channels where we signal busy */
2027 enum transfermodes allowtransfer; /*! SIP Refer restriction scheme */
2028 struct ast_codec_pref prefs; /*!< codec prefs */
2030 unsigned int sipoptions; /*!< Supported SIP options */
2031 struct ast_flags flags[2]; /*!< SIP_ flags */
2033 /*! Mailboxes that this peer cares about */
2034 AST_LIST_HEAD_NOLOCK(, sip_mailbox) mailboxes;
2036 int maxcallbitrate; /*!< Maximum Bitrate for a video call */
2037 int expire; /*!< When to expire this peer registration */
2038 int capability; /*!< Codec capability */
2039 int rtptimeout; /*!< RTP timeout */
2040 int rtpholdtimeout; /*!< RTP Hold Timeout */
2041 int rtpkeepalive; /*!< Send RTP packets for keepalive */
2042 ast_group_t callgroup; /*!< Call group */
2043 ast_group_t pickupgroup; /*!< Pickup group */
2044 struct sip_proxy *outboundproxy; /*!< Outbound proxy for this peer */
2045 struct ast_dnsmgr_entry *dnsmgr;/*!< DNS refresh manager for peer */
2046 struct sockaddr_in addr; /*!< IP address of peer */
2048 struct sip_pvt *call; /*!< Call pointer */
2049 int pokeexpire; /*!< When to expire poke (qualify= checking) */
2050 int lastms; /*!< How long last response took (in ms), or -1 for no response */
2051 int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */
2052 int qualifyfreq; /*!< Qualification: How often to check for the host to be up */
2053 struct timeval ps; /*!< Time for sending SIP OPTION in sip_pke_peer() */
2054 struct sockaddr_in defaddr; /*!< Default IP address, used until registration */
2055 struct ast_ha *ha; /*!< Access control list */
2056 struct ast_ha *contactha; /*!< Restrict what IPs are allowed in the Contact header (for registration) */
2057 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
2058 struct sip_pvt *mwipvt; /*!< Subscription for MWI */
2059 struct sip_st_cfg stimer; /*!< SIP Session-Timers */
2060 int timer_t1; /*!< The maximum T1 value for the peer */
2061 int timer_b; /*!< The maximum timer B (transaction timeouts) */
2062 int deprecated_username; /*!< If it's a realtime peer, are they using the deprecated "username" instead of "defaultuser" */
2064 /*XXX Seems like we suddenly have two flags with the same content. Why? To be continued... */
2065 enum sip_peer_type type; /*!< Distinguish between "user" and "peer" types. This is used solely for CLI and manager commands */
2066 unsigned int allowed_methods;
2071 * \brief Registrations with other SIP proxies
2073 * Created by sip_register(), the entry is linked in the 'regl' list,
2074 * and never deleted (other than at 'sip reload' or module unload times).
2075 * The entry always has a pending timeout, either waiting for an ACK to
2076 * the REGISTER message (in which case we have to retransmit the request),
2077 * or waiting for the next REGISTER message to be sent (either the initial one,
2078 * or once the previously completed registration one expires).
2079 * The registration can be in one of many states, though at the moment
2080 * the handling is a bit mixed.
2082 struct sip_registry {
2083 ASTOBJ_COMPONENTS_FULL(struct sip_registry,1,1);
2084 AST_DECLARE_STRING_FIELDS(
2085 AST_STRING_FIELD(callid); /*!< Global Call-ID */
2086 AST_STRING_FIELD(realm); /*!< Authorization realm */
2087 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
2088 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
2089 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
2090 AST_STRING_FIELD(authdomain); /*!< Authorization domain */
2091 AST_STRING_FIELD(regdomain); /*!< Registration domain */
2092 AST_STRING_FIELD(username); /*!< Who we are registering as */
2093 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
2094 AST_STRING_FIELD(hostname); /*!< Domain or host we register to */
2095 AST_STRING_FIELD(secret); /*!< Password in clear text */
2096 AST_STRING_FIELD(md5secret); /*!< Password in md5 */
2097 AST_STRING_FIELD(callback); /*!< Contact extension */
2098 AST_STRING_FIELD(random);
2099 AST_STRING_FIELD(peername); /*!< Peer registering to */
2101 enum sip_transport transport; /*!< Transport for this registration UDP, TCP or TLS */
2102 int portno; /*!< Optional port override */
2103 int expire; /*!< Sched ID of expiration */
2104 int expiry; /*!< Value to use for the Expires header */
2105 int regattempts; /*!< Number of attempts (since the last success) */
2106 int timeout; /*!< sched id of sip_reg_timeout */
2107 int refresh; /*!< How often to refresh */
2108 struct sip_pvt *call; /*!< create a sip_pvt structure for each outbound "registration dialog" in progress */
2109 enum sipregistrystate regstate; /*!< Registration state (see above) */
2110 struct timeval regtime; /*!< Last successful registration time */
2111 int callid_valid; /*!< 0 means we haven't chosen callid for this registry yet. */
2112 unsigned int ocseq; /*!< Sequence number we got to for REGISTERs for this registry */
2113 struct ast_dnsmgr_entry *dnsmgr; /*!< DNS refresh manager for register */
2114 struct sockaddr_in us; /*!< Who the server thinks we are */
2115 int noncecount; /*!< Nonce-count */
2116 char lastmsg[256]; /*!< Last Message sent/received */
2119 /*! \brief Definition of a thread that handles a socket */
2120 struct sip_threadinfo {
2123 struct ast_tcptls_session_instance *tcptls_session;
2124 enum sip_transport type; /*!< We keep a copy of the type here so we can display it in the connection list */
2125 AST_LIST_ENTRY(sip_threadinfo) list;
2128 /*! \brief Definition of an MWI subscription to another server */
2129 struct sip_subscription_mwi {
2130 ASTOBJ_COMPONENTS_FULL(struct sip_subscription_mwi,1,1);
2131 AST_DECLARE_STRING_FIELDS(
2132 AST_STRING_FIELD(username); /*!< Who we are sending the subscription as */
2133 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
2134 AST_STRING_FIELD(hostname); /*!< Domain or host we subscribe to */
2135 AST_STRING_FIELD(secret); /*!< Password in clear text */
2136 AST_STRING_FIELD(mailbox); /*!< Mailbox store to put MWI into */
2138 enum sip_transport transport; /*!< Transport to use */
2139 int portno; /*!< Optional port override */
2140 int resub; /*!< Sched ID of resubscription */
2141 unsigned int subscribed:1; /*!< Whether we are currently subscribed or not */
2142 struct sip_pvt *call; /*!< Outbound subscription dialog */
2143 struct ast_dnsmgr_entry *dnsmgr; /*!< DNS refresh manager for subscription */
2144 struct sockaddr_in us; /*!< Who the server thinks we are */
2147 /* --- Hash tables of various objects --------*/
2150 static int hash_peer_size = 17;
2151 static int hash_dialog_size = 17;
2152 static int hash_user_size = 17;
2154 static int hash_peer_size = 563; /*!< Size of peer hash table, prime number preferred! */
2155 static int hash_dialog_size = 563;
2156 static int hash_user_size = 563;
2159 /*! \brief The thread list of TCP threads */
2160 static AST_LIST_HEAD_STATIC(threadl, sip_threadinfo);
2162 /*! \brief The peer list: Users, Peers and Friends */
2163 static struct ao2_container *peers;
2164 static struct ao2_container *peers_by_ip;
2166 /*! \brief The register list: Other SIP proxies we register with and place calls to */
2167 static struct ast_register_list {
2168 ASTOBJ_CONTAINER_COMPONENTS(struct sip_registry);
2172 /*! \brief The MWI subscription list */
2173 static struct ast_subscription_mwi_list {
2174 ASTOBJ_CONTAINER_COMPONENTS(struct sip_subscription_mwi);
2178 * \note The only member of the peer used here is the name field
2180 static int peer_hash_cb(const void *obj, const int flags)
2182 const struct sip_peer *peer = obj;
2184 return ast_str_case_hash(peer->name);
2188 * \note The only member of the peer used here is the name field
2190 static int peer_cmp_cb(void *obj, void *arg, int flags)
2192 struct sip_peer *peer = obj, *peer2 = arg;
2194 return !strcasecmp(peer->name, peer2->name) ? CMP_MATCH | CMP_STOP : 0;
2198 * \note the peer's addr struct provides to fields combined to make a key: the sin_addr.s_addr and sin_port fields.
2200 static int peer_iphash_cb(const void *obj, const int flags)
2202 const struct sip_peer *peer = obj;
2203 int ret1 = peer->addr.sin_addr.s_addr;
2207 if (ast_test_flag(&peer->flags[0], SIP_INSECURE_PORT)) {
2210 return ret1 + peer->addr.sin_port;
2215 * \note the peer's addr struct provides to fields combined to make a key: the sin_addr.s_addr and sin_port fields.
2217 static int peer_ipcmp_cb(void *obj, void *arg, int flags)
2219 struct sip_peer *peer = obj, *peer2 = arg;
2221 if (peer->addr.sin_addr.s_addr != peer2->addr.sin_addr.s_addr)
2224 if (!ast_test_flag(&peer->flags[0], SIP_INSECURE_PORT) && !ast_test_flag(&peer2->flags[0], SIP_INSECURE_PORT)) {
2225 if (peer->addr.sin_port == peer2->addr.sin_port)
2226 return CMP_MATCH | CMP_STOP;
2230 return CMP_MATCH | CMP_STOP;
2234 * \note The only member of the dialog used here callid string
2236 static int dialog_hash_cb(const void *obj, const int flags)
2238 const struct sip_pvt *pvt = obj;
2240 return ast_str_case_hash(pvt->callid);
2244 * \note The only member of the dialog used here callid string
2246 static int dialog_cmp_cb(void *obj, void *arg, int flags)
2248 struct sip_pvt *pvt = obj, *pvt2 = arg;
2250 return !strcasecmp(pvt->callid, pvt2->callid) ? CMP_MATCH | CMP_STOP : 0;
2253 static int temp_pvt_init(void *);
2254 static void temp_pvt_cleanup(void *);
2256 /*! \brief A per-thread temporary pvt structure */
2257 AST_THREADSTORAGE_CUSTOM(ts_temp_pvt, temp_pvt_init, temp_pvt_cleanup);
2260 static void ts_ast_rtp_destroy(void *);
2262 AST_THREADSTORAGE_CUSTOM(ts_audio_rtp, NULL, ts_ast_rtp_destroy);
2263 AST_THREADSTORAGE_CUSTOM(ts_video_rtp, NULL, ts_ast_rtp_destroy);
2264 AST_THREADSTORAGE_CUSTOM(ts_text_rtp, NULL, ts_ast_rtp_destroy);
2267 /*! \brief Authentication list for realm authentication
2268 * \todo Move the sip_auth list to AST_LIST */
2269 static struct sip_auth *authl = NULL;
2272 /* --- Sockets and networking --------------*/
2274 /*! \brief Main socket for UDP SIP communication.
2276 * sipsock is shared between the SIP manager thread (which handles reload
2277 * requests), the udp io handler (sipsock_read()) and the user routines that
2278 * issue udp writes (using __sip_xmit()).
2279 * The socket is -1 only when opening fails (this is a permanent condition),
2280 * or when we are handling a reload() that changes its address (this is
2281 * a transient situation during which we might have a harmless race, see
2282 * below). Because the conditions for the race to be possible are extremely
2283 * rare, we don't want to pay the cost of locking on every I/O.
2284 * Rather, we remember that when the race may occur, communication is
2285 * bound to fail anyways, so we just live with this event and let
2286 * the protocol handle this above us.
2288 static int sipsock = -1;
2290 static struct sockaddr_in bindaddr; /*!< UDP: The address we bind to */
2292 /*! \brief our (internal) default address/port to put in SIP/SDP messages
2293 * internip is initialized picking a suitable address from one of the
2294 * interfaces, and the same port number we bind to. It is used as the
2295 * default address/port in SIP messages, and as the default address
2296 * (but not port) in SDP messages.
2298 static struct sockaddr_in internip;
2300 /*! \brief our external IP address/port for SIP sessions.
2301 * externip.sin_addr is only set when we know we might be behind
2302 * a NAT, and this is done using a variety of (mutually exclusive)
2303 * ways from the config file:
2305 * + with "externip = host[:port]" we specify the address/port explicitly.
2306 * The address is looked up only once when (re)loading the config file;
2308 * + with "externhost = host[:port]" we do a similar thing, but the
2309 * hostname is stored in externhost, and the hostname->IP mapping
2310 * is refreshed every 'externrefresh' seconds;
2312 * + with "stunaddr = host[:port]" we run queries every externrefresh seconds
2313 * to the specified server, and store the result in externip.
2315 * Other variables (externhost, externexpire, externrefresh) are used
2316 * to support the above functions.
2318 static struct sockaddr_in externip; /*!< External IP address if we are behind NAT */
2320 static char externhost[MAXHOSTNAMELEN]; /*!< External host name */
2321 static time_t externexpire; /*!< Expiration counter for re-resolving external host name in dynamic DNS */
2322 static int externrefresh = 10;
2323 static struct sockaddr_in stunaddr; /*!< stun server address */
2325 /*! \brief List of local networks
2326 * We store "localnet" addresses from the config file into an access list,
2327 * marked as 'DENY', so the call to ast_apply_ha() will return
2328 * AST_SENSE_DENY for 'local' addresses, and AST_SENSE_ALLOW for 'non local'
2329 * (i.e. presumably public) addresses.
2331 static struct ast_ha *localaddr; /*!< List of local networks, on the same side of NAT as this Asterisk */
2333 static int ourport_tcp; /*!< The port used for TCP connections */
2334 static int ourport_tls; /*!< The port used for TCP/TLS connections */
2335 static struct sockaddr_in debugaddr;
2337 static struct ast_config *notify_types; /*!< The list of manual NOTIFY types we know how to send */
2339 /*! some list management macros. */
2341 #define UNLINK(element, head, prev) do { \
2343 (prev)->next = (element)->next; \
2345 (head) = (element)->next; \
2348 enum t38_action_flag {
2349 SDP_T38_NONE = 0, /*!< Do not modify T38 information at all */
2350 SDP_T38_INITIATE, /*!< Remote side has requested T38 with us */
2351 SDP_T38_ACCEPT, /*!< Remote side accepted our T38 request */
2354 /*---------------------------- Forward declarations of functions in chan_sip.c */
2355 /* Note: This is added to help splitting up chan_sip.c into several files
2356 in coming releases. */
2358 /*--- PBX interface functions */
2359 static struct ast_channel *sip_request_call(const char *type, int format, const struct ast_channel *requestor, void *data, int *cause);
2360 static int sip_devicestate(void *data);
2361 static int sip_sendtext(struct ast_channel *ast, const char *text);
2362 static int sip_call(struct ast_channel *ast, char *dest, int timeout);
2363 static int sip_sendhtml(struct ast_channel *chan, int subclass, const char *data, int datalen);
2364 static int sip_hangup(struct ast_channel *ast);
2365 static int sip_answer(struct ast_channel *ast);
2366 static struct ast_frame *sip_read(struct ast_channel *ast);
2367 static int sip_write(struct ast_channel *ast, struct ast_frame *frame);
2368 static int sip_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
2369 static int sip_transfer(struct ast_channel *ast, const char *dest);
2370 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
2371 static int sip_senddigit_begin(struct ast_channel *ast, char digit);
2372 static int sip_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration);
2373 static int sip_setoption(struct ast_channel *chan, int option, void *data, int datalen);
2374 static int sip_queryoption(struct ast_channel *chan, int option, void *data, int *datalen);
2375 static const char *sip_get_callid(struct ast_channel *chan);
2377 static int handle_request_do(struct sip_request *req, struct sockaddr_in *sin);
2378 static int sip_standard_port(enum sip_transport type, int port);
2379 static int sip_prepare_socket(struct sip_pvt *p);
2380 static int sip_parse_host(char *line, int lineno, char **hostname, int *portnum, enum sip_transport *transport);
2382 /*--- Transmitting responses and requests */
2383 static int sipsock_read(int *id, int fd, short events, void *ignore);
2384 static int __sip_xmit(struct sip_pvt *p, struct ast_str *data, int len);
2385 static int __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, struct ast_str *data, int len, int fatal, int sipmethod);
2386 static int __transmit_response(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
2387 static int retrans_pkt(const void *data);
2388 static int transmit_response_using_temp(ast_string_field callid, struct sockaddr_in *sin, int useglobal_nat, const int intended_method, const struct sip_request *req, const char *msg);
2389 static int transmit_response(struct sip_pvt *p, const char *msg, const struct sip_request *req);
2390 static int transmit_response_reliable(struct sip_pvt *p, const char *msg, const struct sip_request *req);
2391 static int transmit_response_with_date(struct sip_pvt *p, const char *msg, const struct sip_request *req);
2392 static int transmit_response_with_sdp(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable, int oldsdp, int rpid);
2393 static int transmit_response_with_unsupported(struct sip_pvt *p, const char *msg, const struct sip_request *req, const char *unsupported);
2394 static int transmit_response_with_auth(struct sip_pvt *p, const char *msg, const struct sip_request *req, const char *rand, enum xmittype reliable, const char *header, int stale);
2395 static int transmit_response_with_allow(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
2396 static void transmit_fake_auth_response(struct sip_pvt *p, int sipmethod, struct sip_request *req, enum xmittype reliable);
2397 static int transmit_request(struct sip_pvt *p, int sipmethod, int inc, enum xmittype reliable, int newbranch);
2398 static int transmit_request_with_auth(struct sip_pvt *p, int sipmethod, int seqno, enum xmittype reliable, int newbranch);
2399 static int transmit_invite(struct sip_pvt *p, int sipmethod, int sdp, int init);
2400 static int transmit_reinvite_with_sdp(struct sip_pvt *p, int t38version, int oldsdp);
2401 static int transmit_info_with_digit(struct sip_pvt *p, const char digit, unsigned int duration);
2402 static int transmit_info_with_vidupdate(struct sip_pvt *p);
2403 static int transmit_message_with_text(struct sip_pvt *p, const char *text);
2404 static int transmit_refer(struct sip_pvt *p, const char *dest);
2405 static int transmit_notify_with_mwi(struct sip_pvt *p, int newmsgs, int oldmsgs, const char *vmexten);
2406 static int transmit_notify_with_sipfrag(struct sip_pvt *p, int cseq, char *message, int terminate);
2407 static int transmit_notify_custom(struct sip_pvt *p, struct ast_variable *vars);
2408 static int transmit_register(struct sip_registry *r, int sipmethod, const char *auth, const char *authheader);
2409 static int send_response(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno);
2410 static int send_request(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno);
2411 static void copy_request(struct sip_request *dst, const struct sip_request *src);
2412 static void receive_message(struct sip_pvt *p, struct sip_request *req);
2413 static void parse_moved_contact(struct sip_pvt *p, struct sip_request *req, char **name, char **number, int set_call_forward);
2414 static int sip_send_mwi_to_peer(struct sip_peer *peer, const struct ast_event *event, int cache_only);
2416 /*--- Dialog management */
2417 static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *sin,
2418 int useglobal_nat, const int intended_method, struct sip_request *req);
2419 static int __sip_autodestruct(const void *data);
2420 static void sip_scheddestroy(struct sip_pvt *p, int ms);
2421 static int sip_cancel_destroy(struct sip_pvt *p);
2422 static struct sip_pvt *sip_destroy(struct sip_pvt *p);
2423 static void *dialog_unlink_all(struct sip_pvt *dialog, int lockowner, int lockdialoglist);
2424 static void *registry_unref(struct sip_registry *reg, char *tag);
2425 static void __sip_destroy(struct sip_pvt *p, int lockowner, int lockdialoglist);
2426 static int __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
2427 static void __sip_pretend_ack(struct sip_pvt *p);
2428 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
2429 static int auto_congest(const void *arg);
2430 static int update_call_counter(struct sip_pvt *fup, int event);
2431 static int hangup_sip2cause(int cause);
2432 static const char *hangup_cause2sip(int cause);
2433 static struct sip_pvt *find_call(struct sip_request *req, struct sockaddr_in *sin, const int intended_method);
2434 static void free_old_route(struct sip_route *route);
2435 static void list_route(struct sip_route *route);
2436 static void build_route(struct sip_pvt *p, struct sip_request *req, int backwards);
2437 static enum check_auth_result register_verify(struct sip_pvt *p, struct sockaddr_in *sin,
2438 struct sip_request *req, const char *uri);
2439 static struct sip_pvt *get_sip_pvt_byid_locked(const char *callid, const char *totag, const char *fromtag);
2440 static void check_pendings(struct sip_pvt *p);
2441 static void *sip_park_thread(void *stuff);
2442 static int sip_park(struct ast_channel *chan1, struct ast_channel *chan2, struct sip_request *req, int seqno);
2443 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
2445 /*--- Codec handling / SDP */
2446 static void try_suggested_sip_codec(struct sip_pvt *p);
2447 static const char* get_sdp_iterate(int* start, struct sip_request *req, const char *name);
2448 static const char *get_sdp(struct sip_request *req, const char *name);
2449 static int find_sdp(struct sip_request *req);
2450 static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action);
2451 static void add_codec_to_sdp(const struct sip_pvt *p, int codec,
2452 struct ast_str **m_buf, struct ast_str **a_buf,
2453 int debug, int *min_packet_size);
2454 static void add_noncodec_to_sdp(const struct sip_pvt *p, int format,
2455 struct ast_str **m_buf, struct ast_str **a_buf,
2457 static enum sip_result add_sdp(struct sip_request *resp, struct sip_pvt *p, int oldsdp, int add_audio, int add_t38);
2458 static void do_setnat(struct sip_pvt *p);
2459 static void stop_media_flows(struct sip_pvt *p);
2461 /*--- Authentication stuff */
2462 static int reply_digest(struct sip_pvt *p, struct sip_request *req, char *header, int sipmethod, char *digest, int digest_len);
2463 static int build_reply_digest(struct sip_pvt *p, int method, char *digest, int digest_len);
2464 static enum check_auth_result check_auth(struct sip_pvt *p, struct sip_request *req, const char *username,
2465 const char *secret, const char *md5secret, int sipmethod,
2466 const char *uri, enum xmittype reliable, int ignore);
2467 static enum check_auth_result check_user_full(struct sip_pvt *p, struct sip_request *req,
2468 int sipmethod, const char *uri, enum xmittype reliable,
2469 struct sockaddr_in *sin, struct sip_peer **authpeer);
2470 static int check_user(struct sip_pvt *p, struct sip_request *req, int sipmethod, const char *uri, enum xmittype reliable, struct sockaddr_in *sin);
2472 /*--- Domain handling */
2473 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */
2474 static int add_sip_domain(const char *domain, const enum domain_mode mode, const char *context);
2475 static void clear_sip_domains(void);
2477 /*--- SIP realm authentication */
2478 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, const char *configuration, int lineno);
2479 static int clear_realm_authentication(struct sip_auth *authlist); /* Clear realm authentication list (at reload) */
2480 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, const char *realm);
2482 /*--- Misc functions */
2483 static void check_rtp_timeout(struct sip_pvt *dialog, time_t t);
2484 static int sip_do_reload(enum channelreloadreason reason);
2485 static int reload_config(enum channelreloadreason reason);
2486 static int expire_register(const void *data);
2487 static void *do_monitor(void *data);
2488 static int restart_monitor(void);
2489 static void peer_mailboxes_to_str(struct ast_str **mailbox_str, struct sip_peer *peer);
2490 static struct ast_variable *copy_vars(struct ast_variable *src);
2491 /* static int sip_addrcmp(char *name, struct sockaddr_in *sin); Support for peer matching */
2492 static int sip_refer_allocate(struct sip_pvt *p);
2493 static void ast_quiet_chan(struct ast_channel *chan);
2494 static int attempt_transfer(struct sip_dual *transferer, struct sip_dual *target);
2495 static int do_magic_pickup(struct ast_channel *channel, const char *extension, const char *context);
2498 * \brief generic function for determining if a correct transport is being
2499 * used to contact a peer
2501 * this is done as a macro so that the "tmpl" var can be passed either a
2502 * sip_request or a sip_peer
2504 #define check_request_transport(peer, tmpl) ({ \
2506 if (peer->socket.type == tmpl->socket.type) \
2508 else if (!(peer->transports & tmpl->socket.type)) {\
2509 ast_log(LOG_ERROR, \
2510 "'%s' is not a valid transport for '%s'. we only use '%s'! ending call.\n", \
2511 get_transport(tmpl->socket.type), peer->name, get_transport_list(peer->transports) \
2514 } else if (peer->socket.type & SIP_TRANSPORT_TLS) { \
2515 ast_log(LOG_WARNING, \
2516 "peer '%s' HAS NOT USED (OR SWITCHED TO) TLS in favor of '%s' (but this was allowed in sip.conf)!\n", \
2517 peer->name, get_transport(tmpl->socket.type) \
2521 "peer '%s' has contacted us over %s even though we prefer %s.\n", \
2522 peer->name, get_transport(tmpl->socket.type), get_transport(peer->socket.type) \
2529 /*--- Device monitoring and Device/extension state/event handling */
2530 static int cb_extensionstate(char *context, char* exten, int state, void *data);
2531 static int sip_devicestate(void *data);
2532 static int sip_poke_noanswer(const void *data);
2533 static int sip_poke_peer(struct sip_peer *peer, int force);
2534 static void sip_poke_all_peers(void);
2535 static void sip_peer_hold(struct sip_pvt *p, int hold);
2536 static void mwi_event_cb(const struct ast_event *, void *);
2538 /*--- Applications, functions, CLI and manager command helpers */
2539 static const char *sip_nat_mode(const struct sip_pvt *p);
2540 static char *sip_show_inuse(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2541 static char *transfermode2str(enum transfermodes mode) attribute_const;
2542 static int peer_status(struct sip_peer *peer, char *status, int statuslen);
2543 static char *sip_show_sched(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2544 static char * _sip_show_peers(int fd, int *total, struct mansession *s, const struct message *m, int argc, const char *argv[]);
2545 static char *sip_show_peers(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2546 static char *sip_show_objects(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2547 static void print_group(int fd, ast_group_t group, int crlf);
2548 static const char *dtmfmode2str(int mode) attribute_const;
2549 static int str2dtmfmode(const char *str) attribute_unused;
2550 static const char *insecure2str(int mode) attribute_const;
2551 static void cleanup_stale_contexts(char *new, char *old);
2552 static void print_codec_to_cli(int fd, struct ast_codec_pref *pref);
2553 static const char *domain_mode_to_text(const enum domain_mode mode);
2554 static char *sip_show_domains(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2555 static char *_sip_show_peer(int type, int fd, struct mansession *s, const struct message *m, int argc, const char *argv[]);
2556 static char *sip_show_peer(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2557 static char *_sip_qualify_peer(int type, int fd, struct mansession *s, const struct message *m, int argc, const char *argv[]);
2558 static char *sip_qualify_peer(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2559 static char *sip_show_registry(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2560 static char *sip_unregister(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2561 static char *sip_show_settings(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2562 static char *sip_show_mwi(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2563 static const char *subscription_type2str(enum subscriptiontype subtype) attribute_pure;
2564 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
2565 static char *complete_sip_peer(const char *word, int state, int flags2);
2566 static char *complete_sip_registered_peer(const char *word, int state, int flags2);
2567 static char *complete_sip_show_history(const char *line, const char *word, int pos, int state);
2568 static char *complete_sip_show_peer(const char *line, const char *word, int pos, int state);
2569 static char *complete_sip_unregister(const char *line, const char *word, int pos, int state);
2570 static char *complete_sipnotify(const char *line, const char *word, int pos, int state);
2571 static char *sip_show_channel(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2572 static char *sip_show_channelstats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2573 static char *sip_show_history(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2574 static char *sip_do_debug_ip(int fd, const char *arg);
2575 static char *sip_do_debug_peer(int fd, const char *arg);
2576 static char *sip_do_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2577 static char *sip_cli_notify(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2578 static char *sip_set_history(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2579 static int sip_dtmfmode(struct ast_channel *chan, const char *data);
2580 static int sip_addheader(struct ast_channel *chan, const char *data);
2581 static int sip_do_reload(enum channelreloadreason reason);
2582 static char *sip_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2583 static int acf_channel_read(struct ast_channel *chan, const char *funcname, char *preparse, char *buf, size_t buflen);
2586 Functions for enabling debug per IP or fully, or enabling history logging for
2589 static void sip_dump_history(struct sip_pvt *dialog); /* Dump history to debuglog at end of dialog, before destroying data */
2590 static inline int sip_debug_test_addr(const struct sockaddr_in *addr);
2591 static inline int sip_debug_test_pvt(struct sip_pvt *p);
2594 /*! \brief Append to SIP dialog history
2595 \return Always returns 0 */
2596 #define append_history(p, event, fmt , args... ) append_history_full(p, "%-15s " fmt, event, ## args)
2597 static void append_history_full(struct sip_pvt *p, const char *fmt, ...);
2598 static void sip_dump_history(struct sip_pvt *dialog);
2600 /*--- Device object handling */
2601 static struct sip_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime);
2602 static int update_call_counter(struct sip_pvt *fup, int event);
2603 static void sip_destroy_peer(struct sip_peer *peer);
2604 static void sip_destroy_peer_fn(void *peer);
2605 static void set_peer_defaults(struct sip_peer *peer);
2606 static struct sip_peer *temp_peer(const char *name);
2607 static void register_peer_exten(struct sip_peer *peer, int onoff);
2608 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime, int forcenamematch, int devstate_only);
2609 static int sip_poke_peer_s(const void *data);
2610 static enum parse_register_result parse_register_contact(struct sip_pvt *pvt, struct sip_peer *p, struct sip_request *req);
2611 static void reg_source_db(struct sip_peer *peer);
2612 static void destroy_association(struct sip_peer *peer);
2613 static void set_insecure_flags(struct ast_flags *flags, const char *value, int lineno);
2614 static int handle_common_options(struct ast_flags *flags, struct ast_flags *mask, struct ast_variable *v);
2615 static void set_socket_transport(struct sip_socket *socket, int transport);
2617 /* Realtime device support */
2618 static void realtime_update_peer(const char *peername, struct sockaddr_in *sin, const char *username, const char *fullcontact, const char *useragent, int expirey, int deprecated_username, int lastms);
2619 static void update_peer(struct sip_peer *p, int expire);
2620 static struct ast_variable *get_insecure_variable_from_config(struct ast_config *config);
2621 static const char *get_name_from_variable(struct ast_variable *var, const char *newpeername);
2622 static struct sip_peer *realtime_peer(const char *peername, struct sockaddr_in *sin, int devstate_only);
2623 static char *sip_prune_realtime(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2625 /*--- Internal UA client handling (outbound registrations) */
2626 static void ast_sip_ouraddrfor(struct in_addr *them, struct sockaddr_in *us, struct sip_pvt *p);
2627 static void sip_registry_destroy(struct sip_registry *reg);
2628 static int sip_register(const char *value, int lineno);
2629 static const char *regstate2str(enum sipregistrystate regstate) attribute_const;
2630 static int sip_reregister(const void *data);
2631 static int __sip_do_register(struct sip_registry *r);
2632 static int sip_reg_timeout(const void *data);
2633 static void sip_send_all_registers(void);
2634 static int sip_reinvite_retry(const void *data);
2636 /*--- Parsing SIP requests and responses */
2637 static void append_date(struct sip_request *req); /* Append date to SIP packet */
2638 static int determine_firstline_parts(struct sip_request *req);
2639 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
2640 static const char *gettag(const struct sip_request *req, const char *header, char *tagbuf, int tagbufsize);
2641 static int find_sip_method(const char *msg);
2642 static unsigned int parse_sip_options(struct sip_pvt *pvt, const char *supported);
2643 static unsigned int parse_allowed_methods(struct sip_request *req);
2644 static unsigned int set_pvt_allowed_methods(struct sip_pvt *pvt, struct sip_request *req);
2645 static int parse_request(struct sip_request *req);
2646 static const char *get_header(const struct sip_request *req, const char *name);
2647 static const char *referstatus2str(enum referstatus rstatus) attribute_pure;
2648 static int method_match(enum sipmethod id, const char *name);
2649 static void parse_copy(struct sip_request *dst, const struct sip_request *src);
2650 static char *get_in_brackets(char *tmp);
2651 static const char *find_alias(const char *name, const char *_default);
2652 static const char *__get_header(const struct sip_request *req, const char *name, int *start);
2653 static int lws2sws(char *msgbuf, int len);
2654 static void extract_uri(struct sip_pvt *p, struct sip_request *req);
2655 static char *remove_uri_parameters(char *uri);
2656 static int get_refer_info(struct sip_pvt *transferer, struct sip_request *outgoing_req);
2657 static int get_also_info(struct sip_pvt *p, struct sip_request *oreq);
2658 static int parse_ok_contact(struct sip_pvt *pvt, struct sip_request *req);
2659 static int set_address_from_contact(struct sip_pvt *pvt);
2660 static void check_via(struct sip_pvt *p, struct sip_request *req);
2661 static char *get_calleridname(const char *input, char *output, size_t outputsize);
2662 static int get_rpid(struct sip_pvt *p, struct sip_request *oreq);
2663 static int get_rdnis(struct sip_pvt *p, struct sip_request *oreq, char **name, char **number, int *reason);
2664 static int get_destination(struct sip_pvt *p, struct sip_request *oreq);
2665 static int get_msg_text(char *buf, int len, struct sip_request *req, int addnewline);
2666 static int transmit_state_notify(struct sip_pvt *p, int state, int full, int timeout);
2667 static void update_connectedline(struct sip_pvt *p, const void *data, size_t datalen);
2668 static void update_redirecting(struct sip_pvt *p, const void *data, size_t datalen);
2669 static void change_redirecting_information(struct sip_pvt *p, struct sip_request *req, struct ast_party_redirecting *redirecting, int set_call_forward);
2671 /*-- TCP connection handling ---*/
2672 static void *_sip_tcp_helper_thread(struct sip_pvt *pvt, struct ast_tcptls_session_instance *tcptls_session);
2673 static void *sip_tcp_worker_fn(void *);
2675 /*--- Constructing requests and responses */
2676 static void initialize_initreq(struct sip_pvt *p, struct sip_request *req);
2677 static int init_req(struct sip_request *req, int sipmethod, const char *recip);
2678 static int reqprep(struct sip_request *req, struct sip_pvt *p, int sipmethod, int seqno, int newbranch);
2679 static void initreqprep(struct sip_request *req, struct sip_pvt *p, int sipmethod);
2680 static int init_resp(struct sip_request *resp, const char *msg);
2681 static inline int resp_needs_contact(const char *msg, enum sipmethod method);
2682 static int respprep(struct sip_request *resp, struct sip_pvt *p, const char *msg, const struct sip_request *req);
2683 static const struct sockaddr_in *sip_real_dst(const struct sip_pvt *p);
2684 static void build_via(struct sip_pvt *p);
2685 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer);
2686 static int create_addr(struct sip_pvt *dialog, const char *opeer, struct sockaddr_in *sin, int newdialog);
2687 static char *generate_random_string(char *buf, size_t size);
2688 static void build_callid_pvt(struct sip_pvt *pvt);
2689 static void build_callid_registry(struct sip_registry *reg, struct in_addr ourip, const char *fromdomain);
2690 static void make_our_tag(char *tagbuf, size_t len);
2691 static int add_header(struct sip_request *req, const char *var, const char *value);
2692 static int add_header_contentLength(struct sip_request *req, int len);
2693 static int add_line(struct sip_request *req, const char *line);
2694 static int add_text(struct sip_request *req, const char *text);
2695 static int add_digit(struct sip_request *req, char digit, unsigned int duration, int mode);
2696 static int add_rpid(struct sip_request *req, struct sip_pvt *p);
2697 static int add_vidupdate(struct sip_request *req);
2698 static void add_route(struct sip_request *req, struct sip_route *route);
2699 static int copy_header(struct sip_request *req, const struct sip_request *orig, const char *field);
2700 static int copy_all_header(struct sip_request *req, const struct sip_request *orig, const char *field);
2701 static int copy_via_headers(struct sip_pvt *p, struct sip_request *req, const struct sip_request *orig, const char *field);
2702 static void set_destination(struct sip_pvt *p, char *uri);
2703 static void append_date(struct sip_request *req);
2704 static void build_contact(struct sip_pvt *p);
2706 /*------Request handling functions */
2707 static int handle_incoming(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int *recount, int *nounlock);
2708 static int handle_request_update(struct sip_pvt *p, struct sip_request *req);
2709 static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, struct sockaddr_in *sin, int *recount, const char *e, int *nounlock);
2710 static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, int *nounlock);
2711 static int handle_request_bye(struct sip_pvt *p, struct sip_request *req);
2712 static int handle_request_register(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, const char *e);
2713 static int handle_request_cancel(struct sip_pvt *p, struct sip_request *req);
2714 static int handle_request_message(struct sip_pvt *p, struct sip_request *req);
2715 static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int seqno, const char *e);
2716 static void handle_request_info(struct sip_pvt *p, struct sip_request *req);
2717 static int handle_request_options(struct sip_pvt *p, struct sip_request *req);
2718 static int handle_invite_replaces(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, struct sockaddr_in *sin);
2719 static int handle_request_notify(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int seqno, const char *e);
2720 static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *current, struct sip_request *req, int seqno);
2722 /*------Response handling functions */
2723 static void handle_response_invite(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno);
2724 static void handle_response_notify(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno);
2725 static void handle_response_refer(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno);
2726 static void handle_response_subscribe(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno);
2727 static int handle_response_register(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno);
2728 static void handle_response(struct sip_pvt *p, int resp, const char *rest, struct sip_request *req, int seqno);
2730 /*------ T38 Support --------- */
2731 static int transmit_response_with_t38_sdp(struct sip_pvt *p, char *msg, struct sip_request *req, int retrans);
2732 static struct ast_udptl *sip_get_udptl_peer(struct ast_channel *chan);
2733 static int sip_set_udptl_peer(struct ast_channel *chan, struct ast_udptl *udptl);
2734 static void change_t38_state(struct sip_pvt *p, int state);
2736 /*------ Session-Timers functions --------- */
2737 static void proc_422_rsp(struct sip_pvt *p, struct sip_request *rsp);
2738 static int proc_session_timer(const void *vp);
2739 static void stop_session_timer(struct sip_pvt *p);
2740 static void start_session_timer(struct sip_pvt *p);
2741 static void restart_session_timer(struct sip_pvt *p);
2742 static const char *strefresher2str(enum st_refresher r);
2743 static int parse_session_expires(const char *p_hdrval, int *const p_interval, enum st_refresher *const p_ref);
2744 static int parse_minse(const char *p_hdrval, int *const p_interval);
2745 static int st_get_se(struct sip_pvt *, int max);
2746 static enum st_refresher st_get_refresher(struct sip_pvt *);
2747 static enum st_mode st_get_mode(struct sip_pvt *);
2748 static struct sip_st_dlg* sip_st_alloc(struct sip_pvt *const p);
2750 /*------- RTP Glue functions -------- */
2751 static int sip_set_rtp_peer(struct ast_channel *chan, struct ast_rtp_instance *instance, struct ast_rtp_instance *vinstance, struct ast_rtp_instance *tinstance, int codecs, int nat_active);
2753 /*!--- SIP MWI Subscription support */
2754 static int sip_subscribe_mwi(const char *value, int lineno);
2755 static void sip_subscribe_mwi_destroy(struct sip_subscription_mwi *mwi);
2756 static void sip_send_all_mwi_subscriptions(void);
2757 static int sip_subscribe_mwi_do(const void *data);
2758 static int __sip_subscribe_mwi_do(struct sip_subscription_mwi *mwi);
2760 /*! \brief Definition of this channel for PBX channel registration */
2761 static const struct ast_channel_tech sip_tech = {
2763 .description = "Session Initiation Protocol (SIP)",
2764 .capabilities = AST_FORMAT_AUDIO_MASK, /* all audio formats */
2765 .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
2766 .requester = sip_request_call, /* called with chan unlocked */
2767 .devicestate = sip_devicestate, /* called with chan unlocked (not chan-specific) */
2768 .call = sip_call, /* called with chan locked */
2769 .send_html = sip_sendhtml,
2770 .hangup = sip_hangup, /* called with chan locked */
2771 .answer = sip_answer, /* called with chan locked */
2772 .read = sip_read, /* called with chan locked */
2773 .write = sip_write, /* called with chan locked */
2774 .write_video = sip_write, /* called with chan locked */
2775 .write_text = sip_write,
2776 .indicate = sip_indicate, /* called with chan locked */
2777 .transfer = sip_transfer, /* called with chan locked */
2778 .fixup = sip_fixup, /* called with chan locked */
2779 .send_digit_begin = sip_senddigit_begin, /* called with chan unlocked */
2780 .send_digit_end = sip_senddigit_end,
2781 .bridge = ast_rtp_instance_bridge, /* XXX chan unlocked ? */
2782 .early_bridge = ast_rtp_instance_early_bridge,
2783 .send_text = sip_sendtext, /* called with chan locked */
2784 .func_channel_read = acf_channel_read,
2785 .setoption = sip_setoption,
2786 .queryoption = sip_queryoption,
2787 .get_pvt_uniqueid = sip_get_callid,
2790 /*! \brief This version of the sip channel tech has no send_digit_begin
2791 * callback so that the core knows that the channel does not want
2792 * DTMF BEGIN frames.
2793 * The struct is initialized just before registering the channel driver,
2794 * and is for use with channels using SIP INFO DTMF.
2796 static struct ast_channel_tech sip_tech_info;
2799 /*! \brief Working TLS connection configuration */
2800 static struct ast_tls_config sip_tls_cfg;
2802 /*! \brief Default TLS connection configuration */
2803 static struct ast_tls_config default_tls_cfg;
2805 /*! \brief The TCP server definition */
2806 static struct ast_tcptls_session_args sip_tcp_desc = {
2808 .master = AST_PTHREADT_NULL,
2811 .name = "SIP TCP server",
2812 .accept_fn = ast_tcptls_server_root,
2813 .worker_fn = sip_tcp_worker_fn,
2816 /*! \brief The TCP/TLS server definition */
2817 static struct ast_tcptls_session_args sip_tls_desc = {
2819 .master = AST_PTHREADT_NULL,
2820 .tls_cfg = &sip_tls_cfg,
2822 .name = "SIP TLS server",
2823 .accept_fn = ast_tcptls_server_root,
2824 .worker_fn = sip_tcp_worker_fn,
2827 /* wrapper macro to tell whether t points to one of the sip_tech descriptors */
2828 #define IS_SIP_TECH(t) ((t) == &sip_tech || (t) == &sip_tech_info)
2830 /*! \brief map from an integer value to a string.
2831 * If no match is found, return errorstring
2833 static const char *map_x_s(const struct _map_x_s *table, int x, const char *errorstring)
2835 const struct _map_x_s *cur;
2837 for (cur = table; cur->s; cur++)
2843 /*! \brief map from a string to an integer value, case insensitive.
2844 * If no match is found, return errorvalue.
2846 static int map_s_x(const struct _map_x_s *table, const char *s, int errorvalue)
2848 const struct _map_x_s *cur;
2850 for (cur = table; cur->s; cur++)
2851 if (!strcasecmp(cur->s, s))
2857 * duplicate a list of channel variables, \return the copy.
2859 static struct ast_variable *copy_vars(struct ast_variable *src)
2861 struct ast_variable *res = NULL, *tmp, *v = NULL;
2863 for (v = src ; v ; v = v->next) {
2864 if ((tmp = ast_variable_new(v->name, v->value, v->file))) {
2872 /*! \brief SIP TCP connection handler */
2873 static void *sip_tcp_worker_fn(void *data)
2875 struct ast_tcptls_session_instance *tcptls_session = data;
2877 return _sip_tcp_helper_thread(NULL, tcptls_session);
2880 /*! \brief SIP TCP thread management function
2881 This function reads from the socket, parses the packet into a request
2883 static void *_sip_tcp_helper_thread(struct sip_pvt *pvt, struct ast_tcptls_session_instance *tcptls_session)
2886 struct sip_request req = { 0, } , reqcpy = { 0, };
2887 struct sip_threadinfo *me;
2888 char buf[1024] = "";
2890 me = ast_calloc(1, sizeof(*me));
2895 me->threadid = pthread_self();
2896 me->tcptls_session = tcptls_session;
2897 if (tcptls_session->ssl)
2898 me->type = SIP_TRANSPORT_TLS;
2900 me->type = SIP_TRANSPORT_TCP;
2902 ast_debug(2, "Starting thread for %s server\n", tcptls_session->ssl ? "SSL" : "TCP");
2904 AST_LIST_LOCK(&threadl);
2905 AST_LIST_INSERT_TAIL(&threadl, me, list);
2906 AST_LIST_UNLOCK(&threadl);
2908 if (!(req.data = ast_str_create(SIP_MIN_PACKET)))
2910 if (!(reqcpy.data = ast_str_create(SIP_MIN_PACKET)))
2914 struct ast_str *str_save;
2916 str_save = req.data;
2917 memset(&req, 0, sizeof(req));
2918 req.data = str_save;
2919 ast_str_reset(req.data);
2921 str_save = reqcpy.data;
2922 memset(&reqcpy, 0, sizeof(reqcpy));
2923 reqcpy.data = str_save;
2924 ast_str_reset(reqcpy.data);
2926 memset(buf, 0, sizeof(buf));
2928 if (tcptls_session->ssl) {