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"
277 <application name="SIPDtmfMode" language="en_US">
279 Change the dtmfmode for a SIP call.
282 <parameter name="mode" required="true">
284 <enum name="inband" />
286 <enum name="rfc2833" />
291 <para>Changes the dtmfmode for a SIP call.</para>
294 <application name="SIPAddHeader" language="en_US">
296 Add a SIP header to the outbound call.
299 <parameter name="Header" required="true" />
300 <parameter name="Content" required="true" />
303 <para>Adds a header to a SIP call placed with DIAL.</para>
304 <para>Remember to use the X-header if you are adding non-standard SIP
305 headers, like <literal>X-Asterisk-Accountcode:</literal>. Use this with care.
306 Adding the wrong headers may jeopardize the SIP dialog.</para>
307 <para>Always returns <literal>0</literal>.</para>
310 <application name="SIPRemoveHeader" language="en_US">
312 Remove SIP headers previously added with SIPAddHeader
315 <parameter name="Header" required="false" />
318 <para>SIPRemoveHeader() allows you to remove headers which were previously
319 added with SIPAddHeader(). If no parameter is supplied, all previously added
320 headers will be removed. If a parameter is supplied, only the matching headers
321 will be removed.</para>
322 <para>For example you have added these 2 headers:</para>
323 <para>SIPAddHeader(P-Asserted-Identity: sip:foo@bar);</para>
324 <para>SIPAddHeader(P-Preferred-Identity: sip:bar@foo);</para>
326 <para>// remove all headers</para>
327 <para>SIPRemoveHeader();</para>
328 <para>// remove all P- headers</para>
329 <para>SIPRemoveHeader(P-);</para>
330 <para>// remove only the PAI header (note the : at the end)</para>
331 <para>SIPRemoveHeader(P-Asserted-Identity:);</para>
333 <para>Always returns <literal>0</literal>.</para>
336 <function name="SIP_HEADER" language="en_US">
338 Gets the specified SIP header.
341 <parameter name="name" required="true" />
342 <parameter name="number">
343 <para>If not specified, defaults to <literal>1</literal>.</para>
347 <para>Since there are several headers (such as Via) which can occur multiple
348 times, SIP_HEADER takes an optional second argument to specify which header with
349 that name to retrieve. Headers start at offset <literal>1</literal>.</para>
352 <function name="SIPPEER" language="en_US">
354 Gets SIP peer information.
357 <parameter name="peername" required="true" />
358 <parameter name="item">
361 <para>(default) The ip address.</para>
364 <para>The port number.</para>
366 <enum name="mailbox">
367 <para>The configured mailbox.</para>
369 <enum name="context">
370 <para>The configured context.</para>
373 <para>The epoch time of the next expire.</para>
375 <enum name="dynamic">
376 <para>Is it dynamic? (yes/no).</para>
378 <enum name="callerid_name">
379 <para>The configured Caller ID name.</para>
381 <enum name="callerid_num">
382 <para>The configured Caller ID number.</para>
384 <enum name="callgroup">
385 <para>The configured Callgroup.</para>
387 <enum name="pickupgroup">
388 <para>The configured Pickupgroup.</para>
391 <para>The configured codecs.</para>
394 <para>Status (if qualify=yes).</para>
396 <enum name="regexten">
397 <para>Registration extension.</para>
400 <para>Call limit (call-limit).</para>
402 <enum name="busylevel">
403 <para>Configured call level for signalling busy.</para>
405 <enum name="curcalls">
406 <para>Current amount of calls. Only available if call-limit is set.</para>
408 <enum name="language">
409 <para>Default language for peer.</para>
411 <enum name="accountcode">
412 <para>Account code for this peer.</para>
414 <enum name="useragent">
415 <para>Current user agent id for peer.</para>
417 <enum name="chanvar[name]">
418 <para>A channel variable configured with setvar for this peer.</para>
420 <enum name="codec[x]">
421 <para>Preferred codec index number <replaceable>x</replaceable> (beginning with zero).</para>
428 <function name="SIPCHANINFO" language="en_US">
430 Gets the specified SIP parameter from the current channel.
433 <parameter name="item" required="true">
436 <para>The IP address of the peer.</para>
439 <para>The source IP address of the peer.</para>
442 <para>The URI from the <literal>From:</literal> header.</para>
445 <para>The URI from the <literal>Contact:</literal> header.</para>
447 <enum name="useragent">
448 <para>The useragent.</para>
450 <enum name="peername">
451 <para>The name of the peer.</para>
453 <enum name="t38passthrough">
454 <para><literal>1</literal> if T38 is offered or enabled in this channel,
455 otherwise <literal>0</literal>.</para>
462 <function name="CHECKSIPDOMAIN" language="en_US">
464 Checks if domain is a local domain.
467 <parameter name="domain" required="true" />
470 <para>This function checks if the <replaceable>domain</replaceable> in the argument is configured
471 as a local SIP domain that this Asterisk server is configured to handle.
472 Returns the domain name if it is locally handled, otherwise an empty string.
473 Check the <literal>domain=</literal> configuration in <filename>sip.conf</filename>.</para>
487 #define MAX(a,b) ((a) > (b) ? (a) : (b))
490 /* Arguments for find_peer */
491 #define FINDUSERS (1 << 0)
492 #define FINDPEERS (1 << 1)
493 #define FINDALLDEVICES (FINDUSERS | FINDPEERS)
495 #define SIPBUFSIZE 512 /*!< Buffer size for many operations */
497 #define XMIT_ERROR -2
499 #define SIP_RESERVED ";/?:@&=+$,# " /*!< Reserved characters in the username part of the URI */
501 /* #define VOCAL_DATA_HACK */
503 #define DEFAULT_DEFAULT_EXPIRY 120
504 #define DEFAULT_MIN_EXPIRY 60
505 #define DEFAULT_MAX_EXPIRY 3600
506 #define DEFAULT_MWI_EXPIRY 3600
507 #define DEFAULT_REGISTRATION_TIMEOUT 20
508 #define DEFAULT_MAX_FORWARDS "70"
510 /* guard limit must be larger than guard secs */
511 /* guard min must be < 1000, and should be >= 250 */
512 #define EXPIRY_GUARD_SECS 15 /*!< How long before expiry do we reregister */
513 #define EXPIRY_GUARD_LIMIT 30 /*!< Below here, we use EXPIRY_GUARD_PCT instead of
515 #define EXPIRY_GUARD_MIN 500 /*!< This is the minimum guard time applied. If
516 GUARD_PCT turns out to be lower than this, it
517 will use this time instead.
518 This is in milliseconds. */
519 #define EXPIRY_GUARD_PCT 0.20 /*!< Percentage of expires timeout to use when
520 below EXPIRY_GUARD_LIMIT */
521 #define DEFAULT_EXPIRY 900 /*!< Expire slowly */
523 static int min_expiry = DEFAULT_MIN_EXPIRY; /*!< Minimum accepted registration time */
524 static int max_expiry = DEFAULT_MAX_EXPIRY; /*!< Maximum accepted registration time */
525 static int default_expiry = DEFAULT_DEFAULT_EXPIRY;
526 static int mwi_expiry = DEFAULT_MWI_EXPIRY;
528 #define DEFAULT_QUALIFY_GAP 100
529 #define DEFAULT_QUALIFY_PEERS 1
532 #define CALLERID_UNKNOWN "Unknown"
534 #define DEFAULT_MAXMS 2000 /*!< Qualification: Must be faster than 2 seconds by default */
535 #define DEFAULT_QUALIFYFREQ 60 * 1000 /*!< Qualification: How often to check for the host to be up */
536 #define DEFAULT_FREQ_NOTOK 10 * 1000 /*!< Qualification: How often to check, if the host is down... */
538 #define DEFAULT_RETRANS 1000 /*!< How frequently to retransmit Default: 2 * 500 ms in RFC 3261 */
539 #define MAX_RETRANS 6 /*!< Try only 6 times for retransmissions, a total of 7 transmissions */
540 #define DEFAULT_TIMER_T1 500 /*!< SIP timer T1 (according to RFC 3261) */
541 #define SIP_TRANS_TIMEOUT 64 * DEFAULT_TIMER_T1 /*!< SIP request timeout (rfc 3261) 64*T1
542 \todo Use known T1 for timeout (peerpoke)
544 #define DEFAULT_TRANS_TIMEOUT -1 /*!< Use default SIP transaction timeout */
545 #define MAX_AUTHTRIES 3 /*!< Try authentication three times, then fail */
547 #define SIP_MAX_HEADERS 64 /*!< Max amount of SIP headers to read */
548 #define SIP_MAX_LINES 64 /*!< Max amount of lines in SIP attachment (like SDP) */
549 #define SIP_MIN_PACKET 4096 /*!< Initialize size of memory to allocate for packets */
550 #define MAX_HISTORY_ENTRIES 50 /*!< Max entires in the history list for a sip_pvt */
552 #define INITIAL_CSEQ 101 /*!< Our initial sip sequence number */
554 #define DEFAULT_MAX_SE 1800 /*!< Session-Timer Default Session-Expires period (RFC 4028) */
555 #define DEFAULT_MIN_SE 90 /*!< Session-Timer Default Min-SE period (RFC 4028) */
557 #define SDP_MAX_RTPMAP_CODECS 32 /*!< Maximum number of codecs allowed in received SDP */
559 /*! \brief Global jitterbuffer configuration - by default, jb is disabled */
560 static struct ast_jb_conf default_jbconf =
564 .resync_threshold = -1,
567 static struct ast_jb_conf global_jbconf; /*!< Global jitterbuffer configuration */
569 static const char config[] = "sip.conf"; /*!< Main configuration file */
570 static const char notify_config[] = "sip_notify.conf"; /*!< Configuration file for sending Notify with CLI commands to reconfigure or reboot phones */
575 /*! \brief Authorization scheme for call transfers
577 \note Not a bitfield flag, since there are plans for other modes,
578 like "only allow transfers for authenticated devices" */
580 TRANSFER_OPENFORALL, /*!< Allow all SIP transfers */
581 TRANSFER_CLOSED, /*!< Allow no SIP transfers */
585 /*! \brief The result of a lot of functions */
587 AST_SUCCESS = 0, /*!< FALSE means success, funny enough */
588 AST_FAILURE = -1, /*!< Failure code */
591 /*! \brief States for the INVITE transaction, not the dialog
592 \note this is for the INVITE that sets up the dialog
595 INV_NONE = 0, /*!< No state at all, maybe not an INVITE dialog */
596 INV_CALLING = 1, /*!< Invite sent, no answer */
597 INV_PROCEEDING = 2, /*!< We got/sent 1xx message */
598 INV_EARLY_MEDIA = 3, /*!< We got 18x message with to-tag back */
599 INV_COMPLETED = 4, /*!< Got final response with error. Wait for ACK, then CONFIRMED */
600 INV_CONFIRMED = 5, /*!< Confirmed response - we've got an ack (Incoming calls only) */
601 INV_TERMINATED = 6, /*!< Transaction done - either successful (AST_STATE_UP) or failed, but done
602 The only way out of this is a BYE from one side */
603 INV_CANCELLED = 7, /*!< Transaction cancelled by client or server in non-terminated state */
606 /*! \brief Readable descriptions of device states.
607 \note Should be aligned to above table as index */
608 static const struct invstate2stringtable {
609 const enum invitestates state;
611 } invitestate2string[] = {
613 {INV_CALLING, "Calling (Trying)"},
614 {INV_PROCEEDING, "Proceeding "},
615 {INV_EARLY_MEDIA, "Early media"},
616 {INV_COMPLETED, "Completed (done)"},
617 {INV_CONFIRMED, "Confirmed (up)"},
618 {INV_TERMINATED, "Done"},
619 {INV_CANCELLED, "Cancelled"}
622 /*! \brief When sending a SIP message, we can send with a few options, depending on
623 type of SIP request. UNRELIABLE is moslty used for responses to repeated requests,
624 where the original response would be sent RELIABLE in an INVITE transaction */
626 XMIT_CRITICAL = 2, /*!< Transmit critical SIP message reliably, with re-transmits.
627 If it fails, it's critical and will cause a teardown of the session */
628 XMIT_RELIABLE = 1, /*!< Transmit SIP message reliably, with re-transmits */
629 XMIT_UNRELIABLE = 0, /*!< Transmit SIP message without bothering with re-transmits */
632 /*! \brief Results from the parse_register() function */
633 enum parse_register_result {
634 PARSE_REGISTER_FAILED,
635 PARSE_REGISTER_UPDATE,
636 PARSE_REGISTER_QUERY,
639 /*! \brief Type of subscription, based on the packages we do support, see \ref subscription_types */
640 enum subscriptiontype {
649 /*! \brief Subscription types that we support. We support
650 - dialoginfo updates (really device status, not dialog info as was the original intent of the standard)
651 - SIMPLE presence used for device status
652 - Voicemail notification subscriptions
654 static const struct cfsubscription_types {
655 enum subscriptiontype type;
656 const char * const event;
657 const char * const mediatype;
658 const char * const text;
659 } subscription_types[] = {
660 { NONE, "-", "unknown", "unknown" },
661 /* RFC 4235: SIP Dialog event package */
662 { DIALOG_INFO_XML, "dialog", "application/dialog-info+xml", "dialog-info+xml" },
663 { CPIM_PIDF_XML, "presence", "application/cpim-pidf+xml", "cpim-pidf+xml" }, /* RFC 3863 */
664 { PIDF_XML, "presence", "application/pidf+xml", "pidf+xml" }, /* RFC 3863 */
665 { XPIDF_XML, "presence", "application/xpidf+xml", "xpidf+xml" }, /* Pre-RFC 3863 with MS additions */
666 { MWI_NOTIFICATION, "message-summary", "application/simple-message-summary", "mwi" } /* RFC 3842: Mailbox notification */
670 /*! \brief Authentication types - proxy or www authentication
671 \note Endpoints, like Asterisk, should always use WWW authentication to
672 allow multiple authentications in the same call - to the proxy and
680 /*! \brief Authentication result from check_auth* functions */
681 enum check_auth_result {
682 AUTH_DONT_KNOW = -100, /*!< no result, need to check further */
683 /* XXX maybe this is the same as AUTH_NOT_FOUND */
686 AUTH_CHALLENGE_SENT = 1,
687 AUTH_SECRET_FAILED = -1,
688 AUTH_USERNAME_MISMATCH = -2,
689 AUTH_NOT_FOUND = -3, /*!< returned by register_verify */
691 AUTH_UNKNOWN_DOMAIN = -5,
692 AUTH_PEER_NOT_DYNAMIC = -6,
693 AUTH_ACL_FAILED = -7,
694 AUTH_BAD_TRANSPORT = -8,
698 /*! \brief States for outbound registrations (with register= lines in sip.conf */
699 enum sipregistrystate {
700 REG_STATE_UNREGISTERED = 0, /*!< We are not registered
701 * \note Initial state. We should have a timeout scheduled for the initial
702 * (or next) registration transmission, calling sip_reregister
705 REG_STATE_REGSENT, /*!< Registration request sent
706 * \note sent initial request, waiting for an ack or a timeout to
707 * retransmit the initial request.
710 REG_STATE_AUTHSENT, /*!< We have tried to authenticate
711 * \note entered after transmit_register with auth info,
712 * waiting for an ack.
715 REG_STATE_REGISTERED, /*!< Registered and done */
717 REG_STATE_REJECTED, /*!< Registration rejected *
718 * \note only used when the remote party has an expire larger than
719 * our max-expire. This is a final state from which we do not
720 * recover (not sure how correctly).
723 REG_STATE_TIMEOUT, /*!< Registration timed out *
724 * \note XXX unused */
726 REG_STATE_NOAUTH, /*!< We have no accepted credentials
727 * \note fatal - no chance to proceed */
729 REG_STATE_FAILED, /*!< Registration failed after several tries
730 * \note fatal - no chance to proceed */
733 /*! \brief Modes in which Asterisk can be configured to run SIP Session-Timers */
735 SESSION_TIMER_MODE_INVALID = 0, /*!< Invalid value */
736 SESSION_TIMER_MODE_ACCEPT, /*!< Honor inbound Session-Timer requests */
737 SESSION_TIMER_MODE_ORIGINATE, /*!< Originate outbound and honor inbound requests */
738 SESSION_TIMER_MODE_REFUSE /*!< Ignore inbound Session-Timers requests */
741 /*! \brief The entity playing the refresher role for Session-Timers */
743 SESSION_TIMER_REFRESHER_AUTO, /*!< Negotiated */
744 SESSION_TIMER_REFRESHER_UAC, /*!< Session is refreshed by the UAC */
745 SESSION_TIMER_REFRESHER_UAS /*!< Session is refreshed by the UAS */
748 /*! \brief Define some implemented SIP transports
749 \note Asterisk does not support SCTP or UDP/DTLS
752 SIP_TRANSPORT_UDP = 1, /*!< Unreliable transport for SIP, needs retransmissions */
753 SIP_TRANSPORT_TCP = 1 << 1, /*!< Reliable, but unsecure */
754 SIP_TRANSPORT_TLS = 1 << 2, /*!< TCP/TLS - reliable and secure transport for signalling */
757 /*! \brief definition of a sip proxy server
759 * For outbound proxies, a sip_peer will contain a reference to a
760 * dynamically allocated instance of a sip_proxy. A sip_pvt may also
761 * contain a reference to a peer's outboundproxy, or it may contain
762 * a reference to the sip_cfg.outboundproxy.
765 char name[MAXHOSTNAMELEN]; /*!< DNS name of domain/host or IP */
766 struct sockaddr_in ip; /*!< Currently used IP address and port */
767 time_t last_dnsupdate; /*!< When this was resolved */
768 enum sip_transport transport;
769 int force; /*!< If it's an outbound proxy, Force use of this outbound proxy for all outbound requests */
770 /* Room for a SRV record chain based on the name */
773 /*! \brief argument for the 'show channels|subscriptions' callback. */
774 struct __show_chan_arg {
777 int numchans; /* return value */
781 /*! \brief States whether a SIP message can create a dialog in Asterisk. */
782 enum can_create_dialog {
783 CAN_NOT_CREATE_DIALOG,
785 CAN_CREATE_DIALOG_UNSUPPORTED_METHOD,
788 /*! \brief SIP Request methods known by Asterisk
790 \note Do _NOT_ make any changes to this enum, or the array following it;
791 if you think you are doing the right thing, you are probably
792 not doing the right thing. If you think there are changes
793 needed, get someone else to review them first _before_
794 submitting a patch. If these two lists do not match properly
795 bad things will happen.
799 SIP_UNKNOWN, /*!< Unknown response */
800 SIP_RESPONSE, /*!< Not request, response to outbound request */
801 SIP_REGISTER, /*!< Registration to the mothership, tell us where you are located */
802 SIP_OPTIONS, /*!< Check capabilities of a device, used for "ping" too */
803 SIP_NOTIFY, /*!< Status update, Part of the event package standard, result of a SUBSCRIBE or a REFER */
804 SIP_INVITE, /*!< Set up a session */
805 SIP_ACK, /*!< End of a three-way handshake started with INVITE. */
806 SIP_PRACK, /*!< Reliable pre-call signalling. Not supported in Asterisk. */
807 SIP_BYE, /*!< End of a session */
808 SIP_REFER, /*!< Refer to another URI (transfer) */
809 SIP_SUBSCRIBE, /*!< Subscribe for updates (voicemail, session status, device status, presence) */
810 SIP_MESSAGE, /*!< Text messaging */
811 SIP_UPDATE, /*!< Update a dialog. We can send UPDATE; but not accept it */
812 SIP_INFO, /*!< Information updates during a session */
813 SIP_CANCEL, /*!< Cancel an INVITE */
814 SIP_PUBLISH, /*!< Not supported in Asterisk */
815 SIP_PING, /*!< Not supported at all, no standard but still implemented out there */
818 /*! \brief Settings for the 'notifycid' option, see sip.conf.sample for details. */
819 enum notifycid_setting {
825 /*! \brief The core structure to setup dialogs. We parse incoming messages by using
826 structure and then route the messages according to the type.
828 \note Note that sip_methods[i].id == i must hold or the code breaks */
829 static const struct cfsip_methods {
831 int need_rtp; /*!< when this is the 'primary' use for a pvt structure, does it need RTP? */
833 enum can_create_dialog can_create;
835 { SIP_UNKNOWN, RTP, "-UNKNOWN-", CAN_CREATE_DIALOG },
836 { SIP_RESPONSE, NO_RTP, "SIP/2.0", CAN_NOT_CREATE_DIALOG },
837 { SIP_REGISTER, NO_RTP, "REGISTER", CAN_CREATE_DIALOG },
838 { SIP_OPTIONS, NO_RTP, "OPTIONS", CAN_CREATE_DIALOG },
839 { SIP_NOTIFY, NO_RTP, "NOTIFY", CAN_CREATE_DIALOG },
840 { SIP_INVITE, RTP, "INVITE", CAN_CREATE_DIALOG },
841 { SIP_ACK, NO_RTP, "ACK", CAN_NOT_CREATE_DIALOG },
842 { SIP_PRACK, NO_RTP, "PRACK", CAN_NOT_CREATE_DIALOG },
843 { SIP_BYE, NO_RTP, "BYE", CAN_NOT_CREATE_DIALOG },
844 { SIP_REFER, NO_RTP, "REFER", CAN_CREATE_DIALOG },
845 { SIP_SUBSCRIBE, NO_RTP, "SUBSCRIBE", CAN_CREATE_DIALOG },
846 { SIP_MESSAGE, NO_RTP, "MESSAGE", CAN_CREATE_DIALOG },
847 { SIP_UPDATE, NO_RTP, "UPDATE", CAN_NOT_CREATE_DIALOG },
848 { SIP_INFO, NO_RTP, "INFO", CAN_NOT_CREATE_DIALOG },
849 { SIP_CANCEL, NO_RTP, "CANCEL", CAN_NOT_CREATE_DIALOG },
850 { SIP_PUBLISH, NO_RTP, "PUBLISH", CAN_CREATE_DIALOG_UNSUPPORTED_METHOD },
851 { SIP_PING, NO_RTP, "PING", CAN_CREATE_DIALOG_UNSUPPORTED_METHOD }
854 /*! Define SIP option tags, used in Require: and Supported: headers
855 We need to be aware of these properties in the phones to use
856 the replace: header. We should not do that without knowing
857 that the other end supports it...
858 This is nothing we can configure, we learn by the dialog
859 Supported: header on the REGISTER (peer) or the INVITE
861 We are not using many of these today, but will in the future.
862 This is documented in RFC 3261
865 #define NOT_SUPPORTED 0
868 #define SIP_OPT_REPLACES (1 << 0)
869 #define SIP_OPT_100REL (1 << 1)
870 #define SIP_OPT_TIMER (1 << 2)
871 #define SIP_OPT_EARLY_SESSION (1 << 3)
872 #define SIP_OPT_JOIN (1 << 4)
873 #define SIP_OPT_PATH (1 << 5)
874 #define SIP_OPT_PREF (1 << 6)
875 #define SIP_OPT_PRECONDITION (1 << 7)
876 #define SIP_OPT_PRIVACY (1 << 8)
877 #define SIP_OPT_SDP_ANAT (1 << 9)
878 #define SIP_OPT_SEC_AGREE (1 << 10)
879 #define SIP_OPT_EVENTLIST (1 << 11)
880 #define SIP_OPT_GRUU (1 << 12)
881 #define SIP_OPT_TARGET_DIALOG (1 << 13)
882 #define SIP_OPT_NOREFERSUB (1 << 14)
883 #define SIP_OPT_HISTINFO (1 << 15)
884 #define SIP_OPT_RESPRIORITY (1 << 16)
885 #define SIP_OPT_FROMCHANGE (1 << 17)
886 #define SIP_OPT_RECLISTINV (1 << 18)
887 #define SIP_OPT_RECLISTSUB (1 << 19)
888 #define SIP_OPT_OUTBOUND (1 << 20)
889 #define SIP_OPT_UNKNOWN (1 << 21)
892 /*! \brief List of well-known SIP options. If we get this in a require,
893 we should check the list and answer accordingly. */
894 static const struct cfsip_options {
895 int id; /*!< Bitmap ID */
896 int supported; /*!< Supported by Asterisk ? */
897 char * const text; /*!< Text id, as in standard */
898 } sip_options[] = { /* XXX used in 3 places */
899 /* RFC3262: PRACK 100% reliability */
900 { SIP_OPT_100REL, NOT_SUPPORTED, "100rel" },
901 /* RFC3959: SIP Early session support */
902 { SIP_OPT_EARLY_SESSION, NOT_SUPPORTED, "early-session" },
903 /* SIMPLE events: RFC4662 */
904 { SIP_OPT_EVENTLIST, NOT_SUPPORTED, "eventlist" },
905 /* RFC 4916- Connected line ID updates */
906 { SIP_OPT_FROMCHANGE, NOT_SUPPORTED, "from-change" },
907 /* GRUU: Globally Routable User Agent URI's */
908 { SIP_OPT_GRUU, NOT_SUPPORTED, "gruu" },
909 /* RFC4244 History info */
910 { SIP_OPT_HISTINFO, NOT_SUPPORTED, "histinfo" },
911 /* RFC3911: SIP Join header support */
912 { SIP_OPT_JOIN, NOT_SUPPORTED, "join" },
913 /* Disable the REFER subscription, RFC 4488 */
914 { SIP_OPT_NOREFERSUB, NOT_SUPPORTED, "norefersub" },
915 /* SIP outbound - the final NAT battle - draft-sip-outbound */
916 { SIP_OPT_OUTBOUND, NOT_SUPPORTED, "outbound" },
917 /* RFC3327: Path support */
918 { SIP_OPT_PATH, NOT_SUPPORTED, "path" },
919 /* RFC3840: Callee preferences */
920 { SIP_OPT_PREF, NOT_SUPPORTED, "pref" },
921 /* RFC3312: Precondition support */
922 { SIP_OPT_PRECONDITION, NOT_SUPPORTED, "precondition" },
923 /* RFC3323: Privacy with proxies*/
924 { SIP_OPT_PRIVACY, NOT_SUPPORTED, "privacy" },
925 /* RFC-ietf-sip-uri-list-conferencing-02.txt conference invite lists */
926 { SIP_OPT_RECLISTINV, NOT_SUPPORTED, "recipient-list-invite" },
927 /* RFC-ietf-sip-uri-list-subscribe-02.txt - subscription lists */
928 { SIP_OPT_RECLISTSUB, NOT_SUPPORTED, "recipient-list-subscribe" },
929 /* RFC3891: Replaces: header for transfer */
930 { SIP_OPT_REPLACES, SUPPORTED, "replaces" },
931 /* One version of Polycom firmware has the wrong label */
932 { SIP_OPT_REPLACES, SUPPORTED, "replace" },
933 /* RFC4412 Resource priorities */
934 { SIP_OPT_RESPRIORITY, NOT_SUPPORTED, "resource-priority" },
935 /* RFC3329: Security agreement mechanism */
936 { SIP_OPT_SEC_AGREE, NOT_SUPPORTED, "sec_agree" },
937 /* RFC4092: Usage of the SDP ANAT Semantics in the SIP */
938 { SIP_OPT_SDP_ANAT, NOT_SUPPORTED, "sdp-anat" },
939 /* RFC4028: SIP Session-Timers */
940 { SIP_OPT_TIMER, SUPPORTED, "timer" },
941 /* RFC4538: Target-dialog */
942 { SIP_OPT_TARGET_DIALOG,NOT_SUPPORTED, "tdialog" },
945 /*! \brief Diversion header reasons
947 * The core defines a bunch of constants used to define
948 * redirecting reasons. This provides a translation table
949 * between those and the strings which may be present in
950 * a SIP Diversion header
952 static const struct sip_reasons {
953 enum AST_REDIRECTING_REASON code;
955 } sip_reason_table[] = {
956 { AST_REDIRECTING_REASON_UNKNOWN, "unknown" },
957 { AST_REDIRECTING_REASON_USER_BUSY, "user-busy" },
958 { AST_REDIRECTING_REASON_NO_ANSWER, "no-answer" },
959 { AST_REDIRECTING_REASON_UNAVAILABLE, "unavailable" },
960 { AST_REDIRECTING_REASON_UNCONDITIONAL, "unconditional" },
961 { AST_REDIRECTING_REASON_TIME_OF_DAY, "time-of-day" },
962 { AST_REDIRECTING_REASON_DO_NOT_DISTURB, "do-not-disturb" },
963 { AST_REDIRECTING_REASON_DEFLECTION, "deflection" },
964 { AST_REDIRECTING_REASON_FOLLOW_ME, "follow-me" },
965 { AST_REDIRECTING_REASON_OUT_OF_ORDER, "out-of-service" },
966 { AST_REDIRECTING_REASON_AWAY, "away" },
967 { AST_REDIRECTING_REASON_CALL_FWD_DTE, "unknown"}
970 static enum AST_REDIRECTING_REASON sip_reason_str_to_code(const char *text)
972 enum AST_REDIRECTING_REASON ast = AST_REDIRECTING_REASON_UNKNOWN;
975 for (i = 0; i < ARRAY_LEN(sip_reason_table); ++i) {
976 if (!strcasecmp(text, sip_reason_table[i].text)) {
977 ast = sip_reason_table[i].code;
985 static const char *sip_reason_code_to_str(enum AST_REDIRECTING_REASON code)
987 if (code >= 0 && code < ARRAY_LEN(sip_reason_table)) {
988 return sip_reason_table[code].text;
994 /*! \brief SIP Methods we support
995 \todo This string should be set dynamically. We only support REFER and SUBSCRIBE if we have
996 allowsubscribe and allowrefer on in sip.conf.
998 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY"
1000 /*! \brief SIP Extensions we support
1001 \note This should be generated based on the previous array
1002 in combination with settings.
1003 \todo We should not have "timer" if it's disabled in the configuration file.
1005 #define SUPPORTED_EXTENSIONS "replaces, timer"
1007 /*! \brief Standard SIP unsecure port for UDP and TCP from RFC 3261. DO NOT CHANGE THIS */
1008 #define STANDARD_SIP_PORT 5060
1009 /*! \brief Standard SIP TLS port from RFC 3261. DO NOT CHANGE THIS */
1010 #define STANDARD_TLS_PORT 5061
1012 /*! \note in many SIP headers, absence of a port number implies port 5060,
1013 * and this is why we cannot change the above constant.
1014 * There is a limited number of places in asterisk where we could,
1015 * in principle, use a different "default" port number, but
1016 * we do not support this feature at the moment.
1017 * You can run Asterisk with SIP on a different port with a configuration
1018 * option. If you change this value, the signalling will be incorrect.
1021 /*! \name DefaultValues Default values, set and reset in reload_config before reading configuration
1023 These are default values in the source. There are other recommended values in the
1024 sip.conf.sample for new installations. These may differ to keep backwards compatibility,
1025 yet encouraging new behaviour on new installations
1028 #define DEFAULT_CONTEXT "default" /*!< The default context for [general] section as well as devices */
1029 #define DEFAULT_MOHINTERPRET "default" /*!< The default music class */
1030 #define DEFAULT_MOHSUGGEST ""
1031 #define DEFAULT_VMEXTEN "asterisk" /*!< Default voicemail extension */
1032 #define DEFAULT_CALLERID "asterisk" /*!< Default caller ID */
1033 #define DEFAULT_MWI_FROM ""
1034 #define DEFAULT_NOTIFYMIME "application/simple-message-summary"
1035 #define DEFAULT_ALLOWGUEST TRUE
1036 #define DEFAULT_RTPKEEPALIVE 0 /*!< Default RTPkeepalive setting */
1037 #define DEFAULT_CALLCOUNTER FALSE
1038 #define DEFAULT_SRVLOOKUP TRUE /*!< Recommended setting is ON */
1039 #define DEFAULT_COMPACTHEADERS FALSE /*!< Send compact (one-character) SIP headers. Default off */
1040 #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. */
1041 #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. */
1042 #define DEFAULT_TOS_VIDEO 0 /*!< Video packets should be marked as DSCP AF41, but the default is 0 to be compatible with previous versions. */
1043 #define DEFAULT_TOS_TEXT 0 /*!< Text packets should be marked as XXXX XXXX, but the default is 0 to be compatible with previous versions. */
1044 #define DEFAULT_COS_SIP 4 /*!< Level 2 class of service for SIP signalling */
1045 #define DEFAULT_COS_AUDIO 5 /*!< Level 2 class of service for audio media */
1046 #define DEFAULT_COS_VIDEO 6 /*!< Level 2 class of service for video media */
1047 #define DEFAULT_COS_TEXT 5 /*!< Level 2 class of service for text media (T.140) */
1048 #define DEFAULT_ALLOW_EXT_DOM TRUE /*!< Allow external domains */
1049 #define DEFAULT_REALM "asterisk" /*!< Realm for HTTP digest authentication */
1050 #define DEFAULT_NOTIFYRINGING TRUE /*!< Notify devicestate system on ringing state */
1051 #define DEFAULT_NOTIFYCID DISABLED /*!< Include CID with ringing notifications */
1052 #define DEFAULT_PEDANTIC FALSE /*!< Avoid following SIP standards for dialog matching */
1053 #define DEFAULT_AUTOCREATEPEER FALSE /*!< Don't create peers automagically */
1054 #define DEFAULT_MATCHEXTERNIPLOCALLY FALSE /*!< Match extern IP locally default setting */
1055 #define DEFAULT_QUALIFY FALSE /*!< Don't monitor devices */
1056 #define DEFAULT_CALLEVENTS FALSE /*!< Extra manager SIP call events */
1057 #define DEFAULT_ALWAYSAUTHREJECT FALSE /*!< Don't reject authentication requests always */
1058 #define DEFAULT_REGEXTENONQUALIFY FALSE
1059 #define DEFAULT_T1MIN 100 /*!< 100 MS for minimal roundtrip time */
1060 #define DEFAULT_MAX_CALL_BITRATE (384) /*!< Max bitrate for video */
1061 #ifndef DEFAULT_USERAGENT
1062 #define DEFAULT_USERAGENT "Asterisk PBX" /*!< Default Useragent: header unless re-defined in sip.conf */
1063 #define DEFAULT_SDPSESSION "Asterisk PBX" /*!< Default SDP session name, (s=) header unless re-defined in sip.conf */
1064 #define DEFAULT_SDPOWNER "root" /*!< Default SDP username field in (o=) header unless re-defined in sip.conf */
1065 #define DEFAULT_ENGINE "asterisk" /*!< Default RTP engine to use for sessions */
1069 /*! \name DefaultSettings
1070 Default setttings are used as a channel setting and as a default when
1074 static char default_language[MAX_LANGUAGE];
1075 static char default_callerid[AST_MAX_EXTENSION];
1076 static char default_mwi_from[80];
1077 static char default_fromdomain[AST_MAX_EXTENSION];
1078 static char default_notifymime[AST_MAX_EXTENSION];
1079 static int default_qualify; /*!< Default Qualify= setting */
1080 static char default_vmexten[AST_MAX_EXTENSION];
1081 static char default_mohinterpret[MAX_MUSICCLASS]; /*!< Global setting for moh class to use when put on hold */
1082 static char default_mohsuggest[MAX_MUSICCLASS]; /*!< Global setting for moh class to suggest when putting
1083 * a bridged channel on hold */
1084 static char default_parkinglot[AST_MAX_CONTEXT]; /*!< Parkinglot */
1085 static char default_engine[256]; /*!< Default RTP engine */
1086 static int default_maxcallbitrate; /*!< Maximum bitrate for call */
1087 static struct ast_codec_pref default_prefs; /*!< Default codec prefs */
1088 static unsigned int default_transports; /*!< Default Transports (enum sip_transport) that are acceptable */
1089 static unsigned int default_primary_transport; /*!< Default primary Transport (enum sip_transport) for outbound connections to devices */
1093 /*! \name GlobalSettings
1094 Global settings apply to the channel (often settings you can change in the general section
1098 /*! \brief a place to store all global settings for the sip channel driver
1099 These are settings that will be possibly to apply on a group level later on.
1100 \note Do not add settings that only apply to the channel itself and can't
1101 be applied to devices (trunks, services, phones)
1103 struct sip_settings {
1104 int peer_rtupdate; /*!< G: Update database with registration data for peer? */
1105 int rtsave_sysname; /*!< G: Save system name at registration? */
1106 int ignore_regexpire; /*!< G: Ignore expiration of peer */
1107 int rtautoclear; /*!< Realtime ?? */
1108 int directrtpsetup; /*!< Enable support for Direct RTP setup (no re-invites) */
1109 int pedanticsipchecking; /*!< Extra checking ? Default off */
1110 int autocreatepeer; /*!< Auto creation of peers at registration? Default off. */
1111 int srvlookup; /*!< SRV Lookup on or off. Default is on */
1112 int allowguest; /*!< allow unauthenticated peers to connect? */
1113 int alwaysauthreject; /*!< Send 401 Unauthorized for all failing requests */
1114 int compactheaders; /*!< send compact sip headers */
1115 int allow_external_domains; /*!< Accept calls to external SIP domains? */
1116 int callevents; /*!< Whether we send manager events or not */
1117 int regextenonqualify; /*!< Whether to add/remove regexten when qualifying peers */
1118 int matchexterniplocally; /*!< Match externip/externhost setting against localnet setting */
1119 int notifyringing; /*!< Send notifications on ringing */
1120 int notifyhold; /*!< Send notifications on hold */
1121 enum notifycid_setting notifycid; /*!< Send CID with ringing notifications */
1122 enum transfermodes allowtransfer; /*!< SIP Refer restriction scheme */
1123 int allowsubscribe; /*!< Flag for disabling ALL subscriptions, this is FALSE only if all peers are FALSE
1124 the global setting is in globals_flags[1] */
1125 char realm[MAXHOSTNAMELEN]; /*!< Default realm */
1126 struct sip_proxy outboundproxy; /*!< Outbound proxy */
1127 char default_context[AST_MAX_CONTEXT];
1128 char default_subscribecontext[AST_MAX_CONTEXT];
1131 static struct sip_settings sip_cfg;
1133 static int global_match_auth_username; /*!< Match auth username if available instead of From: Default off. */
1135 static int global_relaxdtmf; /*!< Relax DTMF */
1136 static int global_rtptimeout; /*!< Time out call if no RTP */
1137 static int global_rtpholdtimeout; /*!< Time out call if no RTP during hold */
1138 static int global_rtpkeepalive; /*!< Send RTP keepalives */
1139 static int global_reg_timeout;
1140 static int global_regattempts_max; /*!< Registration attempts before giving up */
1141 static int global_callcounter; /*!< Enable call counters for all devices. This is currently enabled by setting the peer
1142 call-limit to 999. When we remove the call-limit from the code, we can make it
1143 with just a boolean flag in the device structure */
1144 static unsigned int global_tos_sip; /*!< IP type of service for SIP packets */
1145 static unsigned int global_tos_audio; /*!< IP type of service for audio RTP packets */
1146 static unsigned int global_tos_video; /*!< IP type of service for video RTP packets */
1147 static unsigned int global_tos_text; /*!< IP type of service for text RTP packets */
1148 static unsigned int global_cos_sip; /*!< 802.1p class of service for SIP packets */
1149 static unsigned int global_cos_audio; /*!< 802.1p class of service for audio RTP packets */
1150 static unsigned int global_cos_video; /*!< 802.1p class of service for video RTP packets */
1151 static unsigned int global_cos_text; /*!< 802.1p class of service for text RTP packets */
1152 static int recordhistory; /*!< Record SIP history. Off by default */
1153 static int dumphistory; /*!< Dump history to verbose before destroying SIP dialog */
1154 static char global_regcontext[AST_MAX_CONTEXT]; /*!< Context for auto-extensions */
1155 static char global_useragent[AST_MAX_EXTENSION]; /*!< Useragent for the SIP channel */
1156 static char global_sdpsession[AST_MAX_EXTENSION]; /*!< SDP session name for the SIP channel */
1157 static char global_sdpowner[AST_MAX_EXTENSION]; /*!< SDP owner name for the SIP channel */
1158 static int global_authfailureevents; /*!< Whether we send authentication failure manager events or not. Default no. */
1159 static int global_t1; /*!< T1 time */
1160 static int global_t1min; /*!< T1 roundtrip time minimum */
1161 static int global_timer_b; /*!< Timer B - RFC 3261 Section 17.1.1.2 */
1162 static int global_autoframing; /*!< Turn autoframing on or off. */
1163 static int global_qualifyfreq; /*!< Qualify frequency */
1164 static int global_qualify_gap; /*!< Time between our group of peer pokes */
1165 static int global_qualify_peers; /*!< Number of peers to poke at a given time */
1168 /*! \brief Codecs that we support by default: */
1169 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
1171 static enum st_mode global_st_mode; /*!< Mode of operation for Session-Timers */
1172 static enum st_refresher global_st_refresher; /*!< Session-Timer refresher */
1173 static int global_min_se; /*!< Lowest threshold for session refresh interval */
1174 static int global_max_se; /*!< Highest threshold for session refresh interval */
1178 /*! \brief Global list of addresses dynamic peers are not allowed to use */
1179 static struct ast_ha *global_contact_ha = NULL;
1180 static int global_dynamic_exclude_static = 0;
1182 /*! \name Object counters @{
1183 * \bug These counters are not handled in a thread-safe way ast_atomic_fetchadd_int()
1184 * should be used to modify these values. */
1185 static int speerobjs = 0; /*!< Static peers */
1186 static int rpeerobjs = 0; /*!< Realtime peers */
1187 static int apeerobjs = 0; /*!< Autocreated peer objects */
1188 static int regobjs = 0; /*!< Registry objects */
1191 static struct ast_flags global_flags[2] = {{0}}; /*!< global SIP_ flags */
1192 static char used_context[AST_MAX_CONTEXT]; /*!< name of automatically created context for unloading */
1195 AST_MUTEX_DEFINE_STATIC(netlock);
1197 /*! \brief Protect the monitoring thread, so only one process can kill or start it, and not
1198 when it's doing something critical. */
1199 AST_MUTEX_DEFINE_STATIC(monlock);
1201 AST_MUTEX_DEFINE_STATIC(sip_reload_lock);
1203 /*! \brief This is the thread for the monitor which checks for input on the channels
1204 which are not currently in use. */
1205 static pthread_t monitor_thread = AST_PTHREADT_NULL;
1207 static int sip_reloading = FALSE; /*!< Flag for avoiding multiple reloads at the same time */
1208 static enum channelreloadreason sip_reloadreason; /*!< Reason for last reload/load of configuration */
1210 static struct sched_context *sched; /*!< The scheduling context */
1211 static struct io_context *io; /*!< The IO context */
1212 static int *sipsock_read_id; /*!< ID of IO entry for sipsock FD */
1214 #define DEC_CALL_LIMIT 0
1215 #define INC_CALL_LIMIT 1
1216 #define DEC_CALL_RINGING 2
1217 #define INC_CALL_RINGING 3
1219 /*! \brief The SIP socket definition */
1221 enum sip_transport type; /*!< UDP, TCP or TLS */
1222 int fd; /*!< Filed descriptor, the actual socket */
1224 struct ast_tcptls_session_instance *tcptls_session; /* If tcp or tls, a socket manager */
1227 /*! \brief sip_request: The data grabbed from the UDP socket
1230 * Incoming messages: we first store the data from the socket in data[],
1231 * adding a trailing \0 to make string parsing routines happy.
1232 * Then call parse_request() and req.method = find_sip_method();
1233 * to initialize the other fields. The \r\n at the end of each line is
1234 * replaced by \0, so that data[] is not a conforming SIP message anymore.
1235 * After this processing, rlPart1 is set to non-NULL to remember
1236 * that we can run get_header() on this kind of packet.
1238 * parse_request() splits the first line as follows:
1239 * Requests have in the first line method uri SIP/2.0
1240 * rlPart1 = method; rlPart2 = uri;
1241 * Responses have in the first line SIP/2.0 NNN description
1242 * rlPart1 = SIP/2.0; rlPart2 = NNN + description;
1244 * For outgoing packets, we initialize the fields with init_req() or init_resp()
1245 * (which fills the first line to "METHOD uri SIP/2.0" or "SIP/2.0 code text"),
1246 * and then fill the rest with add_header() and add_line().
1247 * The \r\n at the end of the line are still there, so the get_header()
1248 * and similar functions don't work on these packets.
1251 struct sip_request {
1252 ptrdiff_t rlPart1; /*!< Offset of the SIP Method Name or "SIP/2.0" protocol version */
1253 ptrdiff_t rlPart2; /*!< Offset of the Request URI or Response Status */
1254 int len; /*!< bytes used in data[], excluding trailing null terminator. Rarely used. */
1255 int headers; /*!< # of SIP Headers */
1256 int method; /*!< Method of this request */
1257 int lines; /*!< Body Content */
1258 unsigned int sdp_start; /*!< the line number where the SDP begins */
1259 unsigned int sdp_end; /*!< the line number where the SDP ends */
1260 char debug; /*!< print extra debugging if non zero */
1261 char has_to_tag; /*!< non-zero if packet has To: tag */
1262 char ignore; /*!< if non-zero This is a re-transmit, ignore it */
1263 /* Array of offsets into the request string of each SIP header*/
1264 ptrdiff_t header[SIP_MAX_HEADERS];
1265 /* Array of offsets into the request string of each SDP line*/
1266 ptrdiff_t line[SIP_MAX_LINES];
1267 struct ast_str *data;
1268 /* XXX Do we need to unref socket.ser when the request goes away? */
1269 struct sip_socket socket; /*!< The socket used for this request */
1270 AST_LIST_ENTRY(sip_request) next;
1273 /* \brief given a sip_request and an offset, return the char * that resides there
1275 * It used to be that rlPart1, rlPart2, and the header and line arrays were character
1276 * pointers. They are now offsets into the ast_str portion of the sip_request structure.
1277 * To avoid adding a bunch of redundant pointer arithmetic to the code, this macro is
1278 * provided to retrieve the string at a particular offset within the request's buffer
1280 #define REQ_OFFSET_TO_STR(req,offset) (ast_str_buffer((req)->data) + ((req)->offset))
1282 /*! \brief structure used in transfers */
1284 struct ast_channel *chan1; /*!< First channel involved */
1285 struct ast_channel *chan2; /*!< Second channel involved */
1286 struct sip_request req; /*!< Request that caused the transfer (REFER) */
1287 int seqno; /*!< Sequence number */
1292 /*! \brief Parameters to the transmit_invite function */
1293 struct sip_invite_param {
1294 int addsipheaders; /*!< Add extra SIP headers */
1295 const char *uri_options; /*!< URI options to add to the URI */
1296 const char *vxml_url; /*!< VXML url for Cisco phones */
1297 char *auth; /*!< Authentication */
1298 char *authheader; /*!< Auth header */
1299 enum sip_auth_type auth_type; /*!< Authentication type */
1300 const char *replaces; /*!< Replaces header for call transfers */
1301 int transfer; /*!< Flag - is this Invite part of a SIP transfer? (invite/replaces) */
1304 /*! \brief Structure to save routing information for a SIP session */
1306 struct sip_route *next;
1310 /*! \brief Modes for SIP domain handling in the PBX */
1312 SIP_DOMAIN_AUTO, /*!< This domain is auto-configured */
1313 SIP_DOMAIN_CONFIG, /*!< This domain is from configuration */
1316 /*! \brief Domain data structure.
1317 \note In the future, we will connect this to a configuration tree specific
1321 char domain[MAXHOSTNAMELEN]; /*!< SIP domain we are responsible for */
1322 char context[AST_MAX_EXTENSION]; /*!< Incoming context for this domain */
1323 enum domain_mode mode; /*!< How did we find this domain? */
1324 AST_LIST_ENTRY(domain) list; /*!< List mechanics */
1327 static AST_LIST_HEAD_STATIC(domain_list, domain); /*!< The SIP domain list */
1330 /*! \brief sip_history: Structure for saving transactions within a SIP dialog */
1331 struct sip_history {
1332 AST_LIST_ENTRY(sip_history) list;
1333 char event[0]; /* actually more, depending on needs */
1336 AST_LIST_HEAD_NOLOCK(sip_history_head, sip_history); /*!< history list, entry in sip_pvt */
1338 /*! \brief sip_auth: Credentials for authentication to other SIP services */
1340 char realm[AST_MAX_EXTENSION]; /*!< Realm in which these credentials are valid */
1341 char username[256]; /*!< Username */
1342 char secret[256]; /*!< Secret */
1343 char md5secret[256]; /*!< MD5Secret */
1344 struct sip_auth *next; /*!< Next auth structure in list */
1348 Various flags for the flags field in the pvt structure
1349 Trying to sort these up (one or more of the following):
1353 When flags are used by multiple structures, it is important that
1354 they have a common layout so it is easy to copy them.
1357 #define SIP_OUTGOING (1 << 0) /*!< D: Direction of the last transaction in this dialog */
1358 #define SIP_RINGING (1 << 2) /*!< D: Have sent 180 ringing */
1359 #define SIP_PROGRESS_SENT (1 << 3) /*!< D: Have sent 183 message progress */
1360 #define SIP_NEEDREINVITE (1 << 4) /*!< D: Do we need to send another reinvite? */
1361 #define SIP_PENDINGBYE (1 << 5) /*!< D: Need to send bye after we ack? */
1362 #define SIP_GOTREFER (1 << 6) /*!< D: Got a refer? */
1363 #define SIP_CALL_LIMIT (1 << 7) /*!< D: Call limit enforced for this call */
1364 #define SIP_INC_COUNT (1 << 8) /*!< D: Did this dialog increment the counter of in-use calls? */
1365 #define SIP_INC_RINGING (1 << 9) /*!< D: Did this connection increment the counter of in-use calls? */
1366 #define SIP_DEFER_BYE_ON_TRANSFER (1 << 10) /*!< D: Do not hangup at first ast_hangup */
1368 #define SIP_PROMISCREDIR (1 << 11) /*!< DP: Promiscuous redirection */
1369 #define SIP_TRUSTRPID (1 << 12) /*!< DP: Trust RPID headers? */
1370 #define SIP_USEREQPHONE (1 << 13) /*!< DP: Add user=phone to numeric URI. Default off */
1371 #define SIP_USECLIENTCODE (1 << 14) /*!< DP: Trust X-ClientCode info message */
1373 /* DTMF flags - see str2dtmfmode() and dtmfmode2str() */
1374 #define SIP_DTMF (7 << 15) /*!< DP: DTMF Support: five settings, uses three bits */
1375 #define SIP_DTMF_RFC2833 (0 << 15) /*!< DP: DTMF Support: RTP DTMF - "rfc2833" */
1376 #define SIP_DTMF_INBAND (1 << 15) /*!< DP: DTMF Support: Inband audio, only for ULAW/ALAW - "inband" */
1377 #define SIP_DTMF_INFO (2 << 15) /*!< DP: DTMF Support: SIP Info messages - "info" */
1378 #define SIP_DTMF_AUTO (3 << 15) /*!< DP: DTMF Support: AUTO switch between rfc2833 and in-band DTMF */
1379 #define SIP_DTMF_SHORTINFO (4 << 15) /*!< DP: DTMF Support: SIP Info messages - "info" - short variant */
1381 /* NAT settings - see nat2str() */
1382 #define SIP_NAT (3 << 18) /*!< DP: four settings, uses two bits */
1383 #define SIP_NAT_NEVER (0 << 18) /*!< DP: No nat support */
1384 #define SIP_NAT_RFC3581 (1 << 18) /*!< DP: NAT RFC3581 */
1385 #define SIP_NAT_ROUTE (2 << 18) /*!< DP: NAT Only ROUTE */
1386 #define SIP_NAT_ALWAYS (3 << 18) /*!< DP: NAT Both ROUTE and RFC3581 */
1388 /* re-INVITE related settings */
1389 #define SIP_REINVITE (7 << 20) /*!< DP: four settings, uses three bits */
1390 #define SIP_REINVITE_NONE (0 << 20) /*!< DP: no reinvite allowed */
1391 #define SIP_CAN_REINVITE (1 << 20) /*!< DP: allow peers to be reinvited to send media directly p2p */
1392 #define SIP_CAN_REINVITE_NAT (2 << 20) /*!< DP: allow media reinvite when new peer is behind NAT */
1393 #define SIP_REINVITE_UPDATE (4 << 20) /*!< DP: use UPDATE (RFC3311) when reinviting this peer */
1395 /* "insecure" settings - see insecure2str() */
1396 #define SIP_INSECURE (3 << 23) /*!< DP: three settings, uses two bits */
1397 #define SIP_INSECURE_NONE (0 << 23) /*!< DP: secure mode */
1398 #define SIP_INSECURE_PORT (1 << 23) /*!< DP: don't require matching port for incoming requests */
1399 #define SIP_INSECURE_INVITE (1 << 24) /*!< DP: don't require authentication for incoming INVITEs */
1401 /* Sending PROGRESS in-band settings */
1402 #define SIP_PROG_INBAND (3 << 25) /*!< DP: three settings, uses two bits */
1403 #define SIP_PROG_INBAND_NEVER (0 << 25)
1404 #define SIP_PROG_INBAND_NO (1 << 25)
1405 #define SIP_PROG_INBAND_YES (2 << 25)
1407 #define SIP_SENDRPID (3 << 29) /*!< DP: Remote Party-ID Support */
1408 #define SIP_SENDRPID_NO (0 << 29)
1409 #define SIP_SENDRPID_PAI (1 << 29) /*!< Use "P-Asserted-Identity" for rpid */
1410 #define SIP_SENDRPID_RPID (2 << 29) /*!< Use "Remote-Party-ID" for rpid */
1411 #define SIP_G726_NONSTANDARD (1 << 31) /*!< DP: Use non-standard packing for G726-32 data */
1413 /*! \brief Flags to copy from peer/user to dialog */
1414 #define SIP_FLAGS_TO_COPY \
1415 (SIP_PROMISCREDIR | SIP_TRUSTRPID | SIP_SENDRPID | SIP_DTMF | SIP_REINVITE | \
1416 SIP_PROG_INBAND | SIP_USECLIENTCODE | SIP_NAT | SIP_G726_NONSTANDARD | \
1417 SIP_USEREQPHONE | SIP_INSECURE)
1421 a second page of flags (for flags[1] */
1423 /* realtime flags */
1424 #define SIP_PAGE2_RTCACHEFRIENDS (1 << 0) /*!< GP: Should we keep RT objects in memory for extended time? */
1425 #define SIP_PAGE2_RTAUTOCLEAR (1 << 2) /*!< GP: Should we clean memory from peers after expiry? */
1426 /* Space for addition of other realtime flags in the future */
1427 #define SIP_PAGE2_STATECHANGEQUEUE (1 << 9) /*!< D: Unsent state pending change exists */
1429 #define SIP_PAGE2_CONNECTLINEUPDATE_PEND (1 << 10)
1430 #define SIP_PAGE2_RPID_IMMEDIATE (1 << 11)
1432 #define SIP_PAGE2_PREFERRED_CODEC (1 << 13) /*!< GDP: Only respond with single most preferred joint codec */
1433 #define SIP_PAGE2_VIDEOSUPPORT (1 << 14) /*!< DP: Video supported if offered? */
1434 #define SIP_PAGE2_TEXTSUPPORT (1 << 15) /*!< GDP: Global text enable */
1435 #define SIP_PAGE2_ALLOWSUBSCRIBE (1 << 16) /*!< GP: Allow subscriptions from this peer? */
1436 #define SIP_PAGE2_ALLOWOVERLAP (1 << 17) /*!< DP: Allow overlap dialing ? */
1437 #define SIP_PAGE2_SUBSCRIBEMWIONLY (1 << 18) /*!< GP: Only issue MWI notification if subscribed to */
1438 #define SIP_PAGE2_IGNORESDPVERSION (1 << 19) /*!< GDP: Ignore the SDP session version number we receive and treat all sessions as new */
1440 #define SIP_PAGE2_T38SUPPORT (7 << 20) /*!< GDP: T38 Fax Passthrough Support */
1441 #define SIP_PAGE2_T38SUPPORT_UDPTL (1 << 20) /*!< GDP: T38 Fax Passthrough Support */
1442 #define SIP_PAGE2_T38SUPPORT_RTP (2 << 20) /*!< GDP: T38 Fax Passthrough Support (not implemented) */
1443 #define SIP_PAGE2_T38SUPPORT_TCP (4 << 20) /*!< GDP: T38 Fax Passthrough Support (not implemented) */
1445 #define SIP_PAGE2_CALL_ONHOLD (3 << 23) /*!< D: Call hold states: */
1446 #define SIP_PAGE2_CALL_ONHOLD_ACTIVE (1 << 23) /*!< D: Active hold */
1447 #define SIP_PAGE2_CALL_ONHOLD_ONEDIR (2 << 23) /*!< D: One directional hold */
1448 #define SIP_PAGE2_CALL_ONHOLD_INACTIVE (3 << 23) /*!< D: Inactive hold */
1450 #define SIP_PAGE2_RFC2833_COMPENSATE (1 << 25) /*!< DP: Compensate for buggy RFC2833 implementations */
1451 #define SIP_PAGE2_BUGGY_MWI (1 << 26) /*!< DP: Buggy CISCO MWI fix */
1452 #define SIP_PAGE2_DIALOG_ESTABLISHED (1 << 27) /*!< 29: Has a dialog been established? */
1453 #define SIP_PAGE2_FAX_DETECT (1 << 28) /*!< DP: Fax Detection support */
1454 #define SIP_PAGE2_REGISTERTRYING (1 << 29) /*!< DP: Send 100 Trying on REGISTER attempts */
1455 #define SIP_PAGE2_UDPTL_DESTINATION (1 << 30) /*!< DP: Use source IP of RTP as destination if NAT is enabled */
1456 #define SIP_PAGE2_VIDEOSUPPORT_ALWAYS (1 << 31) /*!< DP: Always set up video, even if endpoints don't support it */
1458 #define SIP_PAGE2_FLAGS_TO_COPY \
1459 (SIP_PAGE2_ALLOWSUBSCRIBE | SIP_PAGE2_ALLOWOVERLAP | SIP_PAGE2_IGNORESDPVERSION | \
1460 SIP_PAGE2_VIDEOSUPPORT | SIP_PAGE2_T38SUPPORT | SIP_PAGE2_RFC2833_COMPENSATE | \
1461 SIP_PAGE2_BUGGY_MWI | SIP_PAGE2_TEXTSUPPORT | SIP_PAGE2_FAX_DETECT | \
1462 SIP_PAGE2_UDPTL_DESTINATION | SIP_PAGE2_VIDEOSUPPORT_ALWAYS | SIP_PAGE2_PREFERRED_CODEC | \
1463 SIP_PAGE2_RPID_IMMEDIATE)
1467 /*! \name SIPflagsT38
1468 T.38 set of flags */
1471 #define T38FAX_FILL_BIT_REMOVAL (1 << 0) /*!< Default: 0 (unset)*/
1472 #define T38FAX_TRANSCODING_MMR (1 << 1) /*!< Default: 0 (unset)*/
1473 #define T38FAX_TRANSCODING_JBIG (1 << 2) /*!< Default: 0 (unset)*/
1474 /* Rate management */
1475 #define T38FAX_RATE_MANAGEMENT_TRANSFERED_TCF (0 << 3)
1476 #define T38FAX_RATE_MANAGEMENT_LOCAL_TCF (1 << 3) /*!< Unset for transferredTCF (UDPTL), set for localTCF (TPKT) */
1477 /* UDP Error correction */
1478 #define T38FAX_UDP_EC_NONE (0 << 4) /*!< two bits, if unset NO t38UDPEC field in T38 SDP*/
1479 #define T38FAX_UDP_EC_FEC (1 << 4) /*!< Set for t38UDPFEC */
1480 #define T38FAX_UDP_EC_REDUNDANCY (2 << 4) /*!< Set for t38UDPRedundancy */
1481 /* T38 Spec version */
1482 #define T38FAX_VERSION (3 << 6) /*!< two bits, 2 values so far, up to 4 values max */
1483 #define T38FAX_VERSION_0 (0 << 6) /*!< Version 0 */
1484 #define T38FAX_VERSION_1 (1 << 6) /*!< Version 1 */
1485 /* Maximum Fax Rate */
1486 #define T38FAX_RATE_2400 (1 << 8) /*!< 2400 bps t38FaxRate */
1487 #define T38FAX_RATE_4800 (1 << 9) /*!< 4800 bps t38FaxRate */
1488 #define T38FAX_RATE_7200 (1 << 10) /*!< 7200 bps t38FaxRate */
1489 #define T38FAX_RATE_9600 (1 << 11) /*!< 9600 bps t38FaxRate */
1490 #define T38FAX_RATE_12000 (1 << 12) /*!< 12000 bps t38FaxRate */
1491 #define T38FAX_RATE_14400 (1 << 13) /*!< 14400 bps t38FaxRate */
1493 /*!< This is default: NO MMR and JBIG transcoding, NO fill bit removal, transferredTCF TCF, UDP FEC, Version 0 and 9600 max fax rate */
1494 static int global_t38_capability = T38FAX_VERSION_0 | T38FAX_RATE_2400 | T38FAX_RATE_4800 | T38FAX_RATE_7200 | T38FAX_RATE_9600;
1497 /*! \brief debugging state
1498 * We store separately the debugging requests from the config file
1499 * and requests from the CLI. Debugging is enabled if either is set
1500 * (which means that if sipdebug is set in the config file, we can
1501 * only turn it off by reloading the config).
1505 sip_debug_config = 1,
1506 sip_debug_console = 2,
1509 static enum sip_debug_e sipdebug;
1511 /*! \brief extra debugging for 'text' related events.
1512 * At the moment this is set together with sip_debug_console.
1513 * \note It should either go away or be implemented properly.
1515 static int sipdebug_text;
1517 /*! \brief T38 States for a call */
1519 T38_DISABLED = 0, /*!< Not enabled */
1520 T38_LOCAL_REINVITE, /*!< Offered from local - REINVITE */
1521 T38_PEER_DIRECT, /*!< Offered from peer */
1522 T38_PEER_REINVITE, /*!< Offered from peer - REINVITE */
1523 T38_ENABLED /*!< Negotiated (enabled) */
1526 /*! \brief T.38 channel settings (at some point we need to make this alloc'ed */
1527 struct t38properties {
1528 struct ast_flags t38support; /*!< Flag for udptl, rtp or tcp support for this session */
1529 int capability; /*!< Our T38 capability */
1530 int peercapability; /*!< Peers T38 capability */
1531 int jointcapability; /*!< Supported T38 capability at both ends */
1532 enum t38state state; /*!< T.38 state */
1533 unsigned int direct:1; /*!< Whether the T38 came from the initial invite or not */
1536 /*! \brief Parameters to know status of transfer */
1538 REFER_IDLE, /*!< No REFER is in progress */
1539 REFER_SENT, /*!< Sent REFER to transferee */
1540 REFER_RECEIVED, /*!< Received REFER from transferrer */
1541 REFER_CONFIRMED, /*!< Refer confirmed with a 100 TRYING (unused) */
1542 REFER_ACCEPTED, /*!< Accepted by transferee */
1543 REFER_RINGING, /*!< Target Ringing */
1544 REFER_200OK, /*!< Answered by transfer target */
1545 REFER_FAILED, /*!< REFER declined - go on */
1546 REFER_NOAUTH /*!< We had no auth for REFER */
1549 /*! \brief generic struct to map between strings and integers.
1550 * Fill it with x-s pairs, terminate with an entry with s = NULL;
1551 * Then you can call map_x_s(...) to map an integer to a string,
1552 * and map_s_x() for the string -> integer mapping.
1559 static const struct _map_x_s referstatusstrings[] = {
1560 { REFER_IDLE, "<none>" },
1561 { REFER_SENT, "Request sent" },
1562 { REFER_RECEIVED, "Request received" },
1563 { REFER_CONFIRMED, "Confirmed" },
1564 { REFER_ACCEPTED, "Accepted" },
1565 { REFER_RINGING, "Target ringing" },
1566 { REFER_200OK, "Done" },
1567 { REFER_FAILED, "Failed" },
1568 { REFER_NOAUTH, "Failed - auth failure" },
1569 { -1, NULL} /* terminator */
1572 /*! \brief Structure to handle SIP transfers. Dynamically allocated when needed
1573 \note OEJ: Should be moved to string fields */
1575 char refer_to[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO extension */
1576 char refer_to_domain[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO domain */
1577 char refer_to_urioption[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO uri options */
1578 char refer_to_context[AST_MAX_EXTENSION]; /*!< Place to store REFER-TO context */
1579 char referred_by[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
1580 char referred_by_name[AST_MAX_EXTENSION]; /*!< Place to store REFERRED-BY extension */
1581 char refer_contact[AST_MAX_EXTENSION]; /*!< Place to store Contact info from a REFER extension */
1582 char replaces_callid[SIPBUFSIZE]; /*!< Replace info: callid */
1583 char replaces_callid_totag[SIPBUFSIZE/2]; /*!< Replace info: to-tag */
1584 char replaces_callid_fromtag[SIPBUFSIZE/2]; /*!< Replace info: from-tag */
1585 struct sip_pvt *refer_call; /*!< Call we are referring. This is just a reference to a
1586 * dialog owned by someone else, so we should not destroy
1587 * it when the sip_refer object goes.
1589 int attendedtransfer; /*!< Attended or blind transfer? */
1590 int localtransfer; /*!< Transfer to local domain? */
1591 enum referstatus status; /*!< REFER status */
1595 /*! \brief Structure that encapsulates all attributes related to running
1596 * SIP Session-Timers feature on a per dialog basis.
1599 int st_active; /*!< Session-Timers on/off */
1600 int st_interval; /*!< Session-Timers negotiated session refresh interval */
1601 int st_schedid; /*!< Session-Timers ast_sched scheduler id */
1602 enum st_refresher st_ref; /*!< Session-Timers session refresher */
1603 int st_expirys; /*!< Session-Timers number of expirys */
1604 int st_active_peer_ua; /*!< Session-Timers on/off in peer UA */
1605 int st_cached_min_se; /*!< Session-Timers cached Min-SE */
1606 int st_cached_max_se; /*!< Session-Timers cached Session-Expires */
1607 enum st_mode st_cached_mode; /*!< Session-Timers cached M.O. */
1608 enum st_refresher st_cached_ref; /*!< Session-Timers cached refresher */
1612 /*! \brief Structure that encapsulates all attributes related to configuration
1613 * of SIP Session-Timers feature on a per user/peer basis.
1616 enum st_mode st_mode_oper; /*!< Mode of operation for Session-Timers */
1617 enum st_refresher st_ref; /*!< Session-Timer refresher */
1618 int st_min_se; /*!< Lowest threshold for session refresh interval */
1619 int st_max_se; /*!< Highest threshold for session refresh interval */
1625 /*! \brief Structure used for each SIP dialog, ie. a call, a registration, a subscribe.
1626 * Created and initialized by sip_alloc(), the descriptor goes into the list of
1627 * descriptors (dialoglist).
1630 struct sip_pvt *next; /*!< Next dialog in chain */
1631 enum invitestates invitestate; /*!< Track state of SIP_INVITEs */
1632 int method; /*!< SIP method that opened this dialog */
1633 AST_DECLARE_STRING_FIELDS(
1634 AST_STRING_FIELD(callid); /*!< Global CallID */
1635 AST_STRING_FIELD(randdata); /*!< Random data */
1636 AST_STRING_FIELD(accountcode); /*!< Account code */
1637 AST_STRING_FIELD(realm); /*!< Authorization realm */
1638 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
1639 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
1640 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
1641 AST_STRING_FIELD(domain); /*!< Authorization domain */
1642 AST_STRING_FIELD(from); /*!< The From: header */
1643 AST_STRING_FIELD(useragent); /*!< User agent in SIP request */
1644 AST_STRING_FIELD(exten); /*!< Extension where to start */
1645 AST_STRING_FIELD(context); /*!< Context for this call */
1646 AST_STRING_FIELD(subscribecontext); /*!< Subscribecontext */
1647 AST_STRING_FIELD(subscribeuri); /*!< Subscribecontext */
1648 AST_STRING_FIELD(fromdomain); /*!< Domain to show in the from field */
1649 AST_STRING_FIELD(fromuser); /*!< User to show in the user field */
1650 AST_STRING_FIELD(fromname); /*!< Name to show in the user field */
1651 AST_STRING_FIELD(tohost); /*!< Host we should put in the "to" field */
1652 AST_STRING_FIELD(todnid); /*!< DNID of this call (overrides host) */
1653 AST_STRING_FIELD(language); /*!< Default language for this call */
1654 AST_STRING_FIELD(mohinterpret); /*!< MOH class to use when put on hold */
1655 AST_STRING_FIELD(mohsuggest); /*!< MOH class to suggest when putting a peer on hold */
1656 AST_STRING_FIELD(rdnis); /*!< Referring DNIS */
1657 AST_STRING_FIELD(redircause); /*!< Referring cause */
1658 AST_STRING_FIELD(theirtag); /*!< Their tag */
1659 AST_STRING_FIELD(username); /*!< [user] name */
1660 AST_STRING_FIELD(peername); /*!< [peer] name, not set if [user] */
1661 AST_STRING_FIELD(authname); /*!< Who we use for authentication */
1662 AST_STRING_FIELD(uri); /*!< Original requested URI */
1663 AST_STRING_FIELD(okcontacturi); /*!< URI from the 200 OK on INVITE */
1664 AST_STRING_FIELD(peersecret); /*!< Password */
1665 AST_STRING_FIELD(peermd5secret);
1666 AST_STRING_FIELD(cid_num); /*!< Caller*ID number */
1667 AST_STRING_FIELD(cid_name); /*!< Caller*ID name */
1668 AST_STRING_FIELD(mwi_from); /*!< Name to place in the From header in outgoing NOTIFY requests */
1669 AST_STRING_FIELD(fullcontact); /*!< The Contact: that the UA registers with us */
1670 /* we only store the part in <brackets> in this field. */
1671 AST_STRING_FIELD(our_contact); /*!< Our contact header */
1672 AST_STRING_FIELD(url); /*!< URL to be sent with next message to peer */
1673 AST_STRING_FIELD(parkinglot); /*!< Parkinglot */
1674 AST_STRING_FIELD(engine); /*!< RTP engine to use */
1676 char via[128]; /*!< Via: header */
1677 struct sip_socket socket; /*!< The socket used for this dialog */
1678 unsigned int ocseq; /*!< Current outgoing seqno */
1679 unsigned int icseq; /*!< Current incoming seqno */
1680 ast_group_t callgroup; /*!< Call group */
1681 ast_group_t pickupgroup; /*!< Pickup group */
1682 int lastinvite; /*!< Last Cseq of invite */
1683 int lastnoninvite; /*!< Last Cseq of non-invite */
1684 struct ast_flags flags[2]; /*!< SIP_ flags */
1686 /* boolean or small integers that don't belong in flags */
1687 char do_history; /*!< Set if we want to record history */
1688 char alreadygone; /*!< already destroyed by our peer */
1689 char needdestroy; /*!< need to be destroyed by the monitor thread */
1690 char outgoing_call; /*!< this is an outgoing call */
1691 char answered_elsewhere; /*!< This call is cancelled due to answer on another channel */
1692 char novideo; /*!< Didn't get video in invite, don't offer */
1693 char notext; /*!< Text not supported (?) */
1695 int timer_t1; /*!< SIP timer T1, ms rtt */
1696 int timer_b; /*!< SIP timer B, ms */
1697 unsigned int sipoptions; /*!< Supported SIP options on the other end */
1698 unsigned int reqsipoptions; /*!< Required SIP options on the other end */
1699 struct ast_codec_pref prefs; /*!< codec prefs */
1700 int capability; /*!< Special capability (codec) */
1701 int jointcapability; /*!< Supported capability at both ends (codecs) */
1702 int peercapability; /*!< Supported peer capability */
1703 int prefcodec; /*!< Preferred codec (outbound only) */
1704 int noncodeccapability; /*!< DTMF RFC2833 telephony-event */
1705 int jointnoncodeccapability; /*!< Joint Non codec capability */
1706 int redircodecs; /*!< Redirect codecs */
1707 int maxcallbitrate; /*!< Maximum Call Bitrate for Video Calls */
1708 struct sip_proxy *outboundproxy; /*!< Outbound proxy for this dialog. Use ref_proxy to set this instead of setting it directly*/
1709 struct t38properties t38; /*!< T38 settings */
1710 struct sockaddr_in udptlredirip; /*!< Where our T.38 UDPTL should be going if not to us */
1711 struct ast_udptl *udptl; /*!< T.38 UDPTL session */
1712 int callingpres; /*!< Calling presentation */
1713 int authtries; /*!< Times we've tried to authenticate */
1714 int expiry; /*!< How long we take to expire */
1715 long branch; /*!< The branch identifier of this session */
1716 long invite_branch; /*!< The branch used when we sent the initial INVITE */
1717 char tag[11]; /*!< Our tag for this session */
1718 int sessionid; /*!< SDP Session ID */
1719 int sessionversion; /*!< SDP Session Version */
1720 uint64_t sessionversion_remote; /*!< Remote UA's SDP Session Version */
1721 int session_modify; /*!< Session modification request true/false */
1722 struct sockaddr_in sa; /*!< Our peer */
1723 struct sockaddr_in redirip; /*!< Where our RTP should be going if not to us */
1724 struct sockaddr_in vredirip; /*!< Where our Video RTP should be going if not to us */
1725 struct sockaddr_in tredirip; /*!< Where our Text RTP should be going if not to us */
1726 time_t lastrtprx; /*!< Last RTP received */
1727 time_t lastrtptx; /*!< Last RTP sent */
1728 int rtptimeout; /*!< RTP timeout time */
1729 struct sockaddr_in recv; /*!< Received as */
1730 struct sockaddr_in ourip; /*!< Our IP (as seen from the outside) */
1731 struct ast_channel *owner; /*!< Who owns us (if we have an owner) */
1732 struct sip_route *route; /*!< Head of linked list of routing steps (fm Record-Route) */
1733 int route_persistant; /*!< Is this the "real" route? */
1734 struct ast_variable *notify_headers; /*!< Custom notify type */
1735 struct sip_auth *peerauth; /*!< Realm authentication */
1736 int noncecount; /*!< Nonce-count */
1737 char lastmsg[256]; /*!< Last Message sent/received */
1738 int amaflags; /*!< AMA Flags */
1739 int pendinginvite; /*!< Any pending INVITE or state NOTIFY (in subscribe pvt's) ? (seqno of this) */
1740 int glareinvite; /*!< A invite received while a pending invite is already present is stored here. Its seqno is the
1741 value. Since this glare invite's seqno is not the same as the pending invite's, it must be
1742 held in order to properly process acknowledgements for our 491 response. */
1743 struct sip_request initreq; /*!< Latest request that opened a new transaction
1745 NOT the request that opened the dialog */
1747 int initid; /*!< Auto-congest ID if appropriate (scheduler) */
1748 int waitid; /*!< Wait ID for scheduler after 491 or other delays */
1749 int autokillid; /*!< Auto-kill ID (scheduler) */
1750 int t38id; /*!< T.38 Response ID */
1751 enum transfermodes allowtransfer; /*!< REFER: restriction scheme */
1752 struct sip_refer *refer; /*!< REFER: SIP transfer data structure */
1753 enum subscriptiontype subscribed; /*!< SUBSCRIBE: Is this dialog a subscription? */
1754 int stateid; /*!< SUBSCRIBE: ID for devicestate subscriptions */
1755 int laststate; /*!< SUBSCRIBE: Last known extension state */
1756 int dialogver; /*!< SUBSCRIBE: Version for subscription dialog-info */
1758 struct ast_dsp *vad; /*!< Inband DTMF Detection dsp */
1760 struct sip_peer *relatedpeer; /*!< If this dialog is related to a peer, which one
1761 Used in peerpoke, mwi subscriptions */
1762 struct sip_registry *registry; /*!< If this is a REGISTER dialog, to which registry */
1763 struct ast_rtp_instance *rtp; /*!< RTP Session */
1764 struct ast_rtp_instance *vrtp; /*!< Video RTP session */
1765 struct ast_rtp_instance *trtp; /*!< Text RTP session */
1766 struct sip_pkt *packets; /*!< Packets scheduled for re-transmission */
1767 struct sip_history_head *history; /*!< History of this SIP dialog */
1768 size_t history_entries; /*!< Number of entires in the history */
1769 struct ast_variable *chanvars; /*!< Channel variables to set for inbound call */
1770 AST_LIST_HEAD_NOLOCK(request_queue, sip_request) request_queue; /*!< Requests that arrived but could not be processed immediately */
1771 int request_queue_sched_id; /*!< Scheduler ID of any scheduled action to process queued requests */
1772 struct sip_invite_param *options; /*!< Options for INVITE */
1773 int autoframing; /*!< The number of Asters we group in a Pyroflax
1774 before strolling to the Grokyzpå
1775 (A bit unsure of this, please correct if
1777 struct sip_st_dlg *stimer; /*!< SIP Session-Timers */
1779 int red; /*!< T.140 RTP Redundancy */
1780 int hangupcause; /*!< Storage of hangupcause copied from our owner before we disconnect from the AST channel (only used at hangup) */
1782 struct sip_subscription_mwi *mwi; /*!< If this is a subscription MWI dialog, to which subscription */
1787 * Here we implement the container for dialogs (sip_pvt), defining
1788 * generic wrapper functions to ease the transition from the current
1789 * implementation (a single linked list) to a different container.
1790 * In addition to a reference to the container, we need functions to lock/unlock
1791 * the container and individual items, and functions to add/remove
1792 * references to the individual items.
1794 struct ao2_container *dialogs;
1796 #define sip_pvt_lock(x) ao2_lock(x)
1797 #define sip_pvt_trylock(x) ao2_trylock(x)
1798 #define sip_pvt_unlock(x) ao2_unlock(x)
1801 * when we create or delete references, make sure to use these
1802 * functions so we keep track of the refcounts.
1803 * To simplify the code, we allow a NULL to be passed to dialog_unref().
1806 #define dialog_ref(arg1,arg2) dialog_ref_debug((arg1),(arg2), __FILE__, __LINE__, __PRETTY_FUNCTION__)
1807 #define dialog_unref(arg1,arg2) dialog_unref_debug((arg1),(arg2), __FILE__, __LINE__, __PRETTY_FUNCTION__)
1809 static struct sip_pvt *dialog_ref_debug(struct sip_pvt *p, char *tag, char *file, int line, const char *func)
1812 _ao2_ref_debug(p, 1, tag, file, line, func);
1814 ast_log(LOG_ERROR, "Attempt to Ref a null pointer\n");
1818 static struct sip_pvt *dialog_unref_debug(struct sip_pvt *p, char *tag, char *file, int line, const char *func)
1821 _ao2_ref_debug(p, -1, tag, file, line, func);
1825 static struct sip_pvt *dialog_ref(struct sip_pvt *p, char *tag)
1830 ast_log(LOG_ERROR, "Attempt to Ref a null pointer\n");
1834 static struct sip_pvt *dialog_unref(struct sip_pvt *p, char *tag)
1842 /*! \brief sip packet - raw format for outbound packets that are sent or scheduled for transmission
1843 * Packets are linked in a list, whose head is in the struct sip_pvt they belong to.
1844 * Each packet holds a reference to the parent struct sip_pvt.
1845 * This structure is allocated in __sip_reliable_xmit() and only for packets that
1846 * require retransmissions.
1849 struct sip_pkt *next; /*!< Next packet in linked list */
1850 int retrans; /*!< Retransmission number */
1851 int method; /*!< SIP method for this packet */
1852 int seqno; /*!< Sequence number */
1853 char is_resp; /*!< 1 if this is a response packet (e.g. 200 OK), 0 if it is a request */
1854 char is_fatal; /*!< non-zero if there is a fatal error */
1855 struct sip_pvt *owner; /*!< Owner AST call */
1856 int retransid; /*!< Retransmission ID */
1857 int timer_a; /*!< SIP timer A, retransmission timer */
1858 int timer_t1; /*!< SIP Timer T1, estimated RTT or 500 ms */
1859 int packetlen; /*!< Length of packet */
1860 struct ast_str *data;
1864 * \brief A peer's mailbox
1866 * We could use STRINGFIELDS here, but for only two strings, it seems like
1867 * too much effort ...
1869 struct sip_mailbox {
1872 /*! Associated MWI subscription */
1873 struct ast_event_sub *event_sub;
1874 AST_LIST_ENTRY(sip_mailbox) entry;
1877 enum sip_peer_type {
1878 SIP_TYPE_PEER = (1 << 0),
1879 SIP_TYPE_USER = (1 << 1),
1882 /*! \brief Structure for SIP peer data, we place calls to peers if registered or fixed IP address (host)
1884 /* XXX field 'name' must be first otherwise sip_addrcmp() will fail, as will astobj2 hashing of the structure */
1886 char name[80]; /*!< the unique name of this object */
1887 AST_DECLARE_STRING_FIELDS(
1888 AST_STRING_FIELD(secret); /*!< Password for inbound auth */
1889 AST_STRING_FIELD(md5secret); /*!< Password in MD5 */
1890 AST_STRING_FIELD(remotesecret); /*!< Remote secret (trunks, remote devices) */
1891 AST_STRING_FIELD(context); /*!< Default context for incoming calls */
1892 AST_STRING_FIELD(subscribecontext); /*!< Default context for subscriptions */
1893 AST_STRING_FIELD(username); /*!< Temporary username until registration */
1894 AST_STRING_FIELD(accountcode); /*!< Account code */
1895 AST_STRING_FIELD(tohost); /*!< If not dynamic, IP address */
1896 AST_STRING_FIELD(regexten); /*!< Extension to register (if regcontext is used) */
1897 AST_STRING_FIELD(fromuser); /*!< From: user when calling this peer */
1898 AST_STRING_FIELD(fromdomain); /*!< From: domain when calling this peer */
1899 AST_STRING_FIELD(fullcontact); /*!< Contact registered with us (not in sip.conf) */
1900 AST_STRING_FIELD(cid_num); /*!< Caller ID num */
1901 AST_STRING_FIELD(cid_name); /*!< Caller ID name */
1902 AST_STRING_FIELD(vmexten); /*!< Dialplan extension for MWI notify message*/
1903 AST_STRING_FIELD(language); /*!< Default language for prompts */
1904 AST_STRING_FIELD(mohinterpret); /*!< Music on Hold class */
1905 AST_STRING_FIELD(mohsuggest); /*!< Music on Hold class */
1906 AST_STRING_FIELD(parkinglot); /*!< Parkinglot */
1907 AST_STRING_FIELD(useragent); /*!< User agent in SIP request (saved from registration) */
1908 AST_STRING_FIELD(mwi_from); /*!< Name to place in From header for outgoing NOTIFY requests */
1909 AST_STRING_FIELD(engine); /*!< RTP Engine to use */
1911 struct sip_socket socket; /*!< Socket used for this peer */
1912 unsigned int transports:3; /*!< Transports (enum sip_transport) that are acceptable for this peer */
1913 struct sip_auth *auth; /*!< Realm authentication list */
1914 int amaflags; /*!< AMA Flags (for billing) */
1915 int callingpres; /*!< Calling id presentation */
1916 int inUse; /*!< Number of calls in use */
1917 int inRinging; /*!< Number of calls ringing */
1918 int onHold; /*!< Peer has someone on hold */
1919 int call_limit; /*!< Limit of concurrent calls */
1920 int busy_level; /*!< Level of active channels where we signal busy */
1921 enum transfermodes allowtransfer; /*! SIP Refer restriction scheme */
1922 struct ast_codec_pref prefs; /*!< codec prefs */
1924 unsigned int sipoptions; /*!< Supported SIP options */
1925 struct ast_flags flags[2]; /*!< SIP_ flags */
1927 /*! Mailboxes that this peer cares about */
1928 AST_LIST_HEAD_NOLOCK(, sip_mailbox) mailboxes;
1930 /* things that don't belong in flags */
1931 char is_realtime; /*!< this is a 'realtime' peer */
1932 char rt_fromcontact; /*!< copy fromcontact from realtime */
1933 char host_dynamic; /*!< Dynamic Peers register with Asterisk */
1934 char selfdestruct; /*!< Automatic peers need to destruct themselves */
1935 char the_mark; /*!< moved out of ASTOBJ into struct proper; That which bears the_mark should be deleted! */
1937 int expire; /*!< When to expire this peer registration */
1938 int capability; /*!< Codec capability */
1939 int rtptimeout; /*!< RTP timeout */
1940 int rtpholdtimeout; /*!< RTP Hold Timeout */
1941 int rtpkeepalive; /*!< Send RTP packets for keepalive */
1942 ast_group_t callgroup; /*!< Call group */
1943 ast_group_t pickupgroup; /*!< Pickup group */
1944 struct sip_proxy *outboundproxy; /*!< Outbound proxy for this peer */
1945 struct ast_dnsmgr_entry *dnsmgr;/*!< DNS refresh manager for peer */
1946 struct sockaddr_in addr; /*!< IP address of peer */
1947 int maxcallbitrate; /*!< Maximum Bitrate for a video call */
1950 struct sip_pvt *call; /*!< Call pointer */
1951 int pokeexpire; /*!< When to expire poke (qualify= checking) */
1952 int lastms; /*!< How long last response took (in ms), or -1 for no response */
1953 int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */
1954 int qualifyfreq; /*!< Qualification: How often to check for the host to be up */
1955 struct timeval ps; /*!< Time for sending SIP OPTION in sip_pke_peer() */
1956 struct sockaddr_in defaddr; /*!< Default IP address, used until registration */
1957 struct ast_ha *ha; /*!< Access control list */
1958 struct ast_ha *contactha; /*!< Restrict what IPs are allowed in the Contact header (for registration) */
1959 struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
1960 struct sip_pvt *mwipvt; /*!< Subscription for MWI */
1962 struct sip_st_cfg stimer; /*!< SIP Session-Timers */
1963 int timer_t1; /*!< The maximum T1 value for the peer */
1964 int timer_b; /*!< The maximum timer B (transaction timeouts) */
1965 int deprecated_username; /*!< If it's a realtime peer, are they using the deprecated "username" instead of "defaultuser" */
1967 /*XXX Seems like we suddenly have two flags with the same content. Why? To be continued... */
1968 enum sip_peer_type type; /*!< Distinguish between "user" and "peer" types. This is used solely for CLI and manager commands */
1973 * \brief Registrations with other SIP proxies
1975 * Created by sip_register(), the entry is linked in the 'regl' list,
1976 * and never deleted (other than at 'sip reload' or module unload times).
1977 * The entry always has a pending timeout, either waiting for an ACK to
1978 * the REGISTER message (in which case we have to retransmit the request),
1979 * or waiting for the next REGISTER message to be sent (either the initial one,
1980 * or once the previously completed registration one expires).
1981 * The registration can be in one of many states, though at the moment
1982 * the handling is a bit mixed.
1984 * XXX \todo Reference count handling for this object has some problems with
1985 * respect to scheduler entries. The ref count is handled in some places,
1986 * but not all of them. There are some places where references get leaked
1987 * when this scheduler entry gets cancelled. At worst, this would cause
1988 * memory leaks on reloads if registrations get removed from configuration.
1990 struct sip_registry {
1991 ASTOBJ_COMPONENTS_FULL(struct sip_registry,1,1);
1992 AST_DECLARE_STRING_FIELDS(
1993 AST_STRING_FIELD(callid); /*!< Global Call-ID */
1994 AST_STRING_FIELD(realm); /*!< Authorization realm */
1995 AST_STRING_FIELD(nonce); /*!< Authorization nonce */
1996 AST_STRING_FIELD(opaque); /*!< Opaque nonsense */
1997 AST_STRING_FIELD(qop); /*!< Quality of Protection, since SIP wasn't complicated enough yet. */
1998 AST_STRING_FIELD(domain); /*!< Authorization domain */
1999 AST_STRING_FIELD(username); /*!< Who we are registering as */
2000 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
2001 AST_STRING_FIELD(hostname); /*!< Domain or host we register to */
2002 AST_STRING_FIELD(secret); /*!< Password in clear text */
2003 AST_STRING_FIELD(md5secret); /*!< Password in md5 */
2004 AST_STRING_FIELD(callback); /*!< Contact extension */
2005 AST_STRING_FIELD(random);
2007 enum sip_transport transport; /*!< Transport for this registration UDP, TCP or TLS */
2008 int portno; /*!< Optional port override */
2009 int expire; /*!< Sched ID of expiration */
2010 int expiry; /*!< Value to use for the Expires header */
2011 int regattempts; /*!< Number of attempts (since the last success) */
2012 int timeout; /*!< sched id of sip_reg_timeout */
2013 int refresh; /*!< How often to refresh */
2014 struct sip_pvt *call; /*!< create a sip_pvt structure for each outbound "registration dialog" in progress */
2015 enum sipregistrystate regstate; /*!< Registration state (see above) */
2016 struct timeval regtime; /*!< Last successful registration time */
2017 int callid_valid; /*!< 0 means we haven't chosen callid for this registry yet. */
2018 unsigned int ocseq; /*!< Sequence number we got to for REGISTERs for this registry */
2019 struct ast_dnsmgr_entry *dnsmgr; /*!< DNS refresh manager for register */
2020 struct sockaddr_in us; /*!< Who the server thinks we are */
2021 int noncecount; /*!< Nonce-count */
2022 char lastmsg[256]; /*!< Last Message sent/received */
2025 /*! \brief Definition of a thread that handles a socket */
2026 struct sip_threadinfo {
2029 struct ast_tcptls_session_instance *tcptls_session;
2030 enum sip_transport type; /*!< We keep a copy of the type here so we can display it in the connection list */
2031 AST_LIST_ENTRY(sip_threadinfo) list;
2034 /*! \brief Definition of an MWI subscription to another server */
2035 struct sip_subscription_mwi {
2036 ASTOBJ_COMPONENTS_FULL(struct sip_subscription_mwi,1,1);
2037 AST_DECLARE_STRING_FIELDS(
2038 AST_STRING_FIELD(username); /*!< Who we are sending the subscription as */
2039 AST_STRING_FIELD(authuser); /*!< Who we *authenticate* as */
2040 AST_STRING_FIELD(hostname); /*!< Domain or host we subscribe to */
2041 AST_STRING_FIELD(secret); /*!< Password in clear text */
2042 AST_STRING_FIELD(mailbox); /*!< Mailbox store to put MWI into */
2044 enum sip_transport transport; /*!< Transport to use */
2045 int portno; /*!< Optional port override */
2046 int resub; /*!< Sched ID of resubscription */
2047 unsigned int subscribed:1; /*!< Whether we are currently subscribed or not */
2048 struct sip_pvt *call; /*!< Outbound subscription dialog */
2049 struct ast_dnsmgr_entry *dnsmgr; /*!< DNS refresh manager for subscription */
2050 struct sockaddr_in us; /*!< Who the server thinks we are */
2053 /* --- Hash tables of various objects --------*/
2056 static int hash_peer_size = 17;
2057 static int hash_dialog_size = 17;
2058 static int hash_user_size = 17;
2060 static int hash_peer_size = 563; /*!< Size of peer hash table, prime number preferred! */
2061 static int hash_dialog_size = 563;
2062 static int hash_user_size = 563;
2065 /*! \brief The thread list of TCP threads */
2066 static AST_LIST_HEAD_STATIC(threadl, sip_threadinfo);
2068 /*! \brief The peer list: Users, Peers and Friends */
2069 struct ao2_container *peers;
2070 struct ao2_container *peers_by_ip;
2072 /*! \brief The register list: Other SIP proxies we register with and place calls to */
2073 static struct ast_register_list {
2074 ASTOBJ_CONTAINER_COMPONENTS(struct sip_registry);
2078 /*! \brief The MWI subscription list */
2079 static struct ast_subscription_mwi_list {
2080 ASTOBJ_CONTAINER_COMPONENTS(struct sip_subscription_mwi);
2084 * \note The only member of the peer used here is the name field
2086 static int peer_hash_cb(const void *obj, const int flags)
2088 const struct sip_peer *peer = obj;
2090 return ast_str_case_hash(peer->name);
2094 * \note The only member of the peer used here is the name field
2096 static int peer_cmp_cb(void *obj, void *arg, int flags)
2098 struct sip_peer *peer = obj, *peer2 = arg;
2100 return !strcasecmp(peer->name, peer2->name) ? CMP_MATCH | CMP_STOP : 0;
2104 * \note the peer's addr struct provides to fields combined to make a key: the sin_addr.s_addr and sin_port fields.
2106 static int peer_iphash_cb(const void *obj, const int flags)
2108 const struct sip_peer *peer = obj;
2109 int ret1 = peer->addr.sin_addr.s_addr;
2113 if (ast_test_flag(&peer->flags[0], SIP_INSECURE_PORT)) {
2116 return ret1 + peer->addr.sin_port;
2121 * \note the peer's addr struct provides to fields combined to make a key: the sin_addr.s_addr and sin_port fields.
2123 static int peer_ipcmp_cb(void *obj, void *arg, int flags)
2125 struct sip_peer *peer = obj, *peer2 = arg;
2127 if (peer->addr.sin_addr.s_addr != peer2->addr.sin_addr.s_addr)
2130 if (!ast_test_flag(&peer->flags[0], SIP_INSECURE_PORT) && !ast_test_flag(&peer2->flags[0], SIP_INSECURE_PORT)) {
2131 if (peer->addr.sin_port == peer2->addr.sin_port)
2132 return CMP_MATCH | CMP_STOP;
2136 return CMP_MATCH | CMP_STOP;
2140 * \note The only member of the dialog used here callid string
2142 static int dialog_hash_cb(const void *obj, const int flags)
2144 const struct sip_pvt *pvt = obj;
2146 return ast_str_case_hash(pvt->callid);
2150 * \note The only member of the dialog used here callid string
2152 static int dialog_cmp_cb(void *obj, void *arg, int flags)
2154 struct sip_pvt *pvt = obj, *pvt2 = arg;
2156 return !strcasecmp(pvt->callid, pvt2->callid) ? CMP_MATCH | CMP_STOP : 0;
2159 static int temp_pvt_init(void *);
2160 static void temp_pvt_cleanup(void *);
2162 /*! \brief A per-thread temporary pvt structure */
2163 AST_THREADSTORAGE_CUSTOM(ts_temp_pvt, temp_pvt_init, temp_pvt_cleanup);
2166 static void ts_ast_rtp_destroy(void *);
2168 AST_THREADSTORAGE_CUSTOM(ts_audio_rtp, NULL, ts_ast_rtp_destroy);
2169 AST_THREADSTORAGE_CUSTOM(ts_video_rtp, NULL, ts_ast_rtp_destroy);
2170 AST_THREADSTORAGE_CUSTOM(ts_text_rtp, NULL, ts_ast_rtp_destroy);
2173 /*! \brief Authentication list for realm authentication
2174 * \todo Move the sip_auth list to AST_LIST */
2175 static struct sip_auth *authl = NULL;
2178 /* --- Sockets and networking --------------*/
2180 /*! \brief Main socket for UDP SIP communication.
2182 * sipsock is shared between the SIP manager thread (which handles reload
2183 * requests), the udp io handler (sipsock_read()) and the user routines that
2184 * issue udp writes (using __sip_xmit()).
2185 * The socket is -1 only when opening fails (this is a permanent condition),
2186 * or when we are handling a reload() that changes its address (this is
2187 * a transient situation during which we might have a harmless race, see
2188 * below). Because the conditions for the race to be possible are extremely
2189 * rare, we don't want to pay the cost of locking on every I/O.
2190 * Rather, we remember that when the race may occur, communication is
2191 * bound to fail anyways, so we just live with this event and let
2192 * the protocol handle this above us.
2194 static int sipsock = -1;
2196 static struct sockaddr_in bindaddr; /*!< UDP: The address we bind to */
2198 /*! \brief our (internal) default address/port to put in SIP/SDP messages
2199 * internip is initialized picking a suitable address from one of the
2200 * interfaces, and the same port number we bind to. It is used as the
2201 * default address/port in SIP messages, and as the default address
2202 * (but not port) in SDP messages.
2204 static struct sockaddr_in internip;
2206 /*! \brief our external IP address/port for SIP sessions.
2207 * externip.sin_addr is only set when we know we might be behind
2208 * a NAT, and this is done using a variety of (mutually exclusive)
2209 * ways from the config file:
2211 * + with "externip = host[:port]" we specify the address/port explicitly.
2212 * The address is looked up only once when (re)loading the config file;
2214 * + with "externhost = host[:port]" we do a similar thing, but the
2215 * hostname is stored in externhost, and the hostname->IP mapping
2216 * is refreshed every 'externrefresh' seconds;
2218 * + with "stunaddr = host[:port]" we run queries every externrefresh seconds
2219 * to the specified server, and store the result in externip.
2221 * Other variables (externhost, externexpire, externrefresh) are used
2222 * to support the above functions.
2224 static struct sockaddr_in externip; /*!< External IP address if we are behind NAT */
2226 static char externhost[MAXHOSTNAMELEN]; /*!< External host name */
2227 static time_t externexpire; /*!< Expiration counter for re-resolving external host name in dynamic DNS */
2228 static int externrefresh = 10;
2229 static struct sockaddr_in stunaddr; /*!< stun server address */
2231 /*! \brief List of local networks
2232 * We store "localnet" addresses from the config file into an access list,
2233 * marked as 'DENY', so the call to ast_apply_ha() will return
2234 * AST_SENSE_DENY for 'local' addresses, and AST_SENSE_ALLOW for 'non local'
2235 * (i.e. presumably public) addresses.
2237 static struct ast_ha *localaddr; /*!< List of local networks, on the same side of NAT as this Asterisk */
2239 static int ourport_tcp; /*!< The port used for TCP connections */
2240 static int ourport_tls; /*!< The port used for TCP/TLS connections */
2241 static struct sockaddr_in debugaddr;
2243 static struct ast_config *notify_types; /*!< The list of manual NOTIFY types we know how to send */
2245 /*! some list management macros. */
2247 #define UNLINK(element, head, prev) do { \
2249 (prev)->next = (element)->next; \
2251 (head) = (element)->next; \
2254 enum t38_action_flag {
2255 SDP_T38_NONE = 0, /*!< Do not modify T38 information at all */
2256 SDP_T38_INITIATE, /*!< Remote side has requested T38 with us */
2257 SDP_T38_ACCEPT, /*!< Remote side accepted our T38 request */
2260 /*---------------------------- Forward declarations of functions in chan_sip.c */
2261 /* Note: This is added to help splitting up chan_sip.c into several files
2262 in coming releases. */
2264 /*--- PBX interface functions */
2265 static struct ast_channel *sip_request_call(const char *type, int format, void *data, int *cause);
2266 static int sip_devicestate(void *data);
2267 static int sip_sendtext(struct ast_channel *ast, const char *text);
2268 static int sip_call(struct ast_channel *ast, char *dest, int timeout);
2269 static int sip_sendhtml(struct ast_channel *chan, int subclass, const char *data, int datalen);
2270 static int sip_hangup(struct ast_channel *ast);
2271 static int sip_answer(struct ast_channel *ast);
2272 static struct ast_frame *sip_read(struct ast_channel *ast);
2273 static int sip_write(struct ast_channel *ast, struct ast_frame *frame);
2274 static int sip_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
2275 static int sip_transfer(struct ast_channel *ast, const char *dest);
2276 static int sip_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
2277 static int sip_senddigit_begin(struct ast_channel *ast, char digit);
2278 static int sip_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration);
2279 static int sip_setoption(struct ast_channel *chan, int option, void *data, int datalen);
2280 static int sip_queryoption(struct ast_channel *chan, int option, void *data, int *datalen);
2281 static const char *sip_get_callid(struct ast_channel *chan);
2283 static int handle_request_do(struct sip_request *req, struct sockaddr_in *sin);
2284 static int sip_standard_port(enum sip_transport type, int port);
2285 static int sip_prepare_socket(struct sip_pvt *p);
2286 static int sip_parse_host(char *line, int lineno, char **hostname, int *portnum, enum sip_transport *transport);
2288 /*--- Transmitting responses and requests */
2289 static int sipsock_read(int *id, int fd, short events, void *ignore);
2290 static int __sip_xmit(struct sip_pvt *p, struct ast_str *data, int len);
2291 static int __sip_reliable_xmit(struct sip_pvt *p, int seqno, int resp, struct ast_str *data, int len, int fatal, int sipmethod);
2292 static int __transmit_response(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
2293 static int retrans_pkt(const void *data);
2294 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);
2295 static int transmit_response(struct sip_pvt *p, const char *msg, const struct sip_request *req);
2296 static int transmit_response_reliable(struct sip_pvt *p, const char *msg, const struct sip_request *req);
2297 static int transmit_response_with_date(struct sip_pvt *p, const char *msg, const struct sip_request *req);
2298 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);
2299 static int transmit_response_with_unsupported(struct sip_pvt *p, const char *msg, const struct sip_request *req, const char *unsupported);
2300 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);
2301 static int transmit_response_with_allow(struct sip_pvt *p, const char *msg, const struct sip_request *req, enum xmittype reliable);
2302 static void transmit_fake_auth_response(struct sip_pvt *p, int sipmethod, struct sip_request *req, enum xmittype reliable);
2303 static int transmit_request(struct sip_pvt *p, int sipmethod, int inc, enum xmittype reliable, int newbranch);
2304 static int transmit_request_with_auth(struct sip_pvt *p, int sipmethod, int seqno, enum xmittype reliable, int newbranch);
2305 static int transmit_invite(struct sip_pvt *p, int sipmethod, int sdp, int init);
2306 static int transmit_reinvite_with_sdp(struct sip_pvt *p, int t38version, int oldsdp);
2307 static int transmit_info_with_digit(struct sip_pvt *p, const char digit, unsigned int duration);
2308 static int transmit_info_with_vidupdate(struct sip_pvt *p);
2309 static int transmit_message_with_text(struct sip_pvt *p, const char *text);
2310 static int transmit_refer(struct sip_pvt *p, const char *dest);
2311 static int transmit_notify_with_mwi(struct sip_pvt *p, int newmsgs, int oldmsgs, const char *vmexten);
2312 static int transmit_notify_with_sipfrag(struct sip_pvt *p, int cseq, char *message, int terminate);
2313 static int transmit_notify_custom(struct sip_pvt *p, struct ast_variable *vars);
2314 static int transmit_register(struct sip_registry *r, int sipmethod, const char *auth, const char *authheader);
2315 static int send_response(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno);
2316 static int send_request(struct sip_pvt *p, struct sip_request *req, enum xmittype reliable, int seqno);
2317 static void copy_request(struct sip_request *dst, const struct sip_request *src);
2318 static void receive_message(struct sip_pvt *p, struct sip_request *req);
2319 static void parse_moved_contact(struct sip_pvt *p, struct sip_request *req, char **name, char **number, int set_call_forward);
2320 static int sip_send_mwi_to_peer(struct sip_peer *peer, const struct ast_event *event, int cache_only);
2322 /*--- Dialog management */
2323 static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *sin,
2324 int useglobal_nat, const int intended_method);
2325 static int __sip_autodestruct(const void *data);
2326 static void sip_scheddestroy(struct sip_pvt *p, int ms);
2327 static int sip_cancel_destroy(struct sip_pvt *p);
2328 static struct sip_pvt *sip_destroy(struct sip_pvt *p);
2329 static void *dialog_unlink_all(struct sip_pvt *dialog, int lockowner, int lockdialoglist);
2330 static void *registry_unref(struct sip_registry *reg, char *tag);
2331 static void __sip_destroy(struct sip_pvt *p, int lockowner, int lockdialoglist);
2332 static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
2333 static void __sip_pretend_ack(struct sip_pvt *p);
2334 static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
2335 static int auto_congest(const void *arg);
2336 static int update_call_counter(struct sip_pvt *fup, int event);
2337 static int hangup_sip2cause(int cause);
2338 static const char *hangup_cause2sip(int cause);
2339 static struct sip_pvt *find_call(struct sip_request *req, struct sockaddr_in *sin, const int intended_method);
2340 static void free_old_route(struct sip_route *route);
2341 static void list_route(struct sip_route *route);
2342 static void build_route(struct sip_pvt *p, struct sip_request *req, int backwards);
2343 static enum check_auth_result register_verify(struct sip_pvt *p, struct sockaddr_in *sin,
2344 struct sip_request *req, char *uri);
2345 static struct sip_pvt *get_sip_pvt_byid_locked(const char *callid, const char *totag, const char *fromtag);
2346 static void check_pendings(struct sip_pvt *p);
2347 static void *sip_park_thread(void *stuff);
2348 static int sip_park(struct ast_channel *chan1, struct ast_channel *chan2, struct sip_request *req, int seqno);
2349 static int sip_sipredirect(struct sip_pvt *p, const char *dest);
2351 /*--- Codec handling / SDP */
2352 static void try_suggested_sip_codec(struct sip_pvt *p);
2353 static const char* get_sdp_iterate(int* start, struct sip_request *req, const char *name);
2354 static const char *get_sdp(struct sip_request *req, const char *name);
2355 static int find_sdp(struct sip_request *req);
2356 static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action);
2357 static void add_codec_to_sdp(const struct sip_pvt *p, int codec,
2358 struct ast_str **m_buf, struct ast_str **a_buf,
2359 int debug, int *min_packet_size);
2360 static void add_noncodec_to_sdp(const struct sip_pvt *p, int format,
2361 struct ast_str **m_buf, struct ast_str **a_buf,
2363 static enum sip_result add_sdp(struct sip_request *resp, struct sip_pvt *p, int oldsdp, int add_audio, int add_t38);
2364 static void do_setnat(struct sip_pvt *p, int natflags);
2365 static void stop_media_flows(struct sip_pvt *p);
2367 /*--- Authentication stuff */
2368 static int reply_digest(struct sip_pvt *p, struct sip_request *req, char *header, int sipmethod, char *digest, int digest_len);
2369 static int build_reply_digest(struct sip_pvt *p, int method, char *digest, int digest_len);
2370 static enum check_auth_result check_auth(struct sip_pvt *p, struct sip_request *req, const char *username,
2371 const char *secret, const char *md5secret, int sipmethod,
2372 char *uri, enum xmittype reliable, int ignore);
2373 static enum check_auth_result check_user_full(struct sip_pvt *p, struct sip_request *req,
2374 int sipmethod, char *uri, enum xmittype reliable,
2375 struct sockaddr_in *sin, struct sip_peer **authpeer);
2376 static int check_user(struct sip_pvt *p, struct sip_request *req, int sipmethod, char *uri, enum xmittype reliable, struct sockaddr_in *sin);
2378 /*--- Domain handling */
2379 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */
2380 static int add_sip_domain(const char *domain, const enum domain_mode mode, const char *context);
2381 static void clear_sip_domains(void);
2383 /*--- SIP realm authentication */
2384 static struct sip_auth *add_realm_authentication(struct sip_auth *authlist, const char *configuration, int lineno);
2385 static int clear_realm_authentication(struct sip_auth *authlist); /* Clear realm authentication list (at reload) */
2386 static struct sip_auth *find_realm_authentication(struct sip_auth *authlist, const char *realm);
2388 /*--- Misc functions */
2389 static void check_rtp_timeout(struct sip_pvt *dialog, time_t t);
2390 static int sip_do_reload(enum channelreloadreason reason);
2391 static int reload_config(enum channelreloadreason reason);
2392 static int expire_register(const void *data);
2393 static void *do_monitor(void *data);
2394 static int restart_monitor(void);
2395 static void peer_mailboxes_to_str(struct ast_str **mailbox_str, struct sip_peer *peer);
2396 static struct ast_variable *copy_vars(struct ast_variable *src);
2397 /* static int sip_addrcmp(char *name, struct sockaddr_in *sin); Support for peer matching */
2398 static int sip_refer_allocate(struct sip_pvt *p);
2399 static void ast_quiet_chan(struct ast_channel *chan);
2400 static int attempt_transfer(struct sip_dual *transferer, struct sip_dual *target);
2401 static int do_magic_pickup(struct ast_channel *channel, const char *extension, const char *context);
2404 * \brief generic function for determining if a correct transport is being
2405 * used to contact a peer
2407 * this is done as a macro so that the "tmpl" var can be passed either a
2408 * sip_request or a sip_peer
2410 #define check_request_transport(peer, tmpl) ({ \
2412 if (peer->socket.type == tmpl->socket.type) \
2414 else if (!(peer->transports & tmpl->socket.type)) {\
2415 ast_log(LOG_ERROR, \
2416 "'%s' is not a valid transport for '%s'. we only use '%s'! ending call.\n", \
2417 get_transport(tmpl->socket.type), peer->name, get_transport_list(peer->transports) \
2420 } else if (peer->socket.type & SIP_TRANSPORT_TLS) { \
2421 ast_log(LOG_WARNING, \
2422 "peer '%s' HAS NOT USED (OR SWITCHED TO) TLS in favor of '%s' (but this was allowed in sip.conf)!\n", \
2423 peer->name, get_transport(tmpl->socket.type) \
2427 "peer '%s' has contacted us over %s even though we prefer %s.\n", \
2428 peer->name, get_transport(tmpl->socket.type), get_transport(peer->socket.type) \
2435 /*--- Device monitoring and Device/extension state/event handling */
2436 static int cb_extensionstate(char *context, char* exten, int state, void *data);
2437 static int sip_devicestate(void *data);
2438 static int sip_poke_noanswer(const void *data);
2439 static int sip_poke_peer(struct sip_peer *peer, int force);
2440 static void sip_poke_all_peers(void);
2441 static void sip_peer_hold(struct sip_pvt *p, int hold);
2442 static void mwi_event_cb(const struct ast_event *, void *);
2444 /*--- Applications, functions, CLI and manager command helpers */
2445 static const char *sip_nat_mode(const struct sip_pvt *p);
2446 static char *sip_show_inuse(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2447 static char *transfermode2str(enum transfermodes mode) attribute_const;
2448 static const char *nat2str(int nat) attribute_const;
2449 static int peer_status(struct sip_peer *peer, char *status, int statuslen);
2450 static char *sip_show_sched(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2451 static char * _sip_show_peers(int fd, int *total, struct mansession *s, const struct message *m, int argc, const char *argv[]);
2452 static char *sip_show_peers(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2453 static char *sip_show_objects(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2454 static void print_group(int fd, ast_group_t group, int crlf);
2455 static const char *dtmfmode2str(int mode) attribute_const;
2456 static int str2dtmfmode(const char *str) attribute_unused;
2457 static const char *insecure2str(int mode) attribute_const;
2458 static void cleanup_stale_contexts(char *new, char *old);
2459 static void print_codec_to_cli(int fd, struct ast_codec_pref *pref);
2460 static const char *domain_mode_to_text(const enum domain_mode mode);
2461 static char *sip_show_domains(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2462 static char *_sip_show_peer(int type, int fd, struct mansession *s, const struct message *m, int argc, const char *argv[]);
2463 static char *sip_show_peer(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2464 static char *_sip_qualify_peer(int type, int fd, struct mansession *s, const struct message *m, int argc, const char *argv[]);
2465 static char *sip_qualify_peer(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2466 static char *sip_show_registry(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2467 static char *sip_unregister(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2468 static char *sip_show_settings(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2469 static char *sip_show_mwi(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2470 static const char *subscription_type2str(enum subscriptiontype subtype) attribute_pure;
2471 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
2472 static char *complete_sip_peer(const char *word, int state, int flags2);
2473 static char *complete_sip_registered_peer(const char *word, int state, int flags2);
2474 static char *complete_sip_show_history(const char *line, const char *word, int pos, int state);
2475 static char *complete_sip_show_peer(const char *line, const char *word, int pos, int state);
2476 static char *complete_sip_unregister(const char *line, const char *word, int pos, int state);
2477 static char *complete_sipnotify(const char *line, const char *word, int pos, int state);
2478 static char *sip_show_channel(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2479 static char *sip_show_channelstats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2480 static char *sip_show_history(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2481 static char *sip_do_debug_ip(int fd, char *arg);
2482 static char *sip_do_debug_peer(int fd, char *arg);
2483 static char *sip_do_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2484 static char *sip_cli_notify(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2485 static char *sip_set_history(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2486 static int sip_dtmfmode(struct ast_channel *chan, void *data);
2487 static int sip_addheader(struct ast_channel *chan, void *data);
2488 static int sip_do_reload(enum channelreloadreason reason);
2489 static char *sip_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2490 static int acf_channel_read(struct ast_channel *chan, const char *funcname, char *preparse, char *buf, size_t buflen);
2493 Functions for enabling debug per IP or fully, or enabling history logging for
2496 static void sip_dump_history(struct sip_pvt *dialog); /* Dump history to debuglog at end of dialog, before destroying data */
2497 static inline int sip_debug_test_addr(const struct sockaddr_in *addr);
2498 static inline int sip_debug_test_pvt(struct sip_pvt *p);
2501 /*! \brief Append to SIP dialog history
2502 \return Always returns 0 */
2503 #define append_history(p, event, fmt , args... ) append_history_full(p, "%-15s " fmt, event, ## args)
2504 static void append_history_full(struct sip_pvt *p, const char *fmt, ...);
2505 static void sip_dump_history(struct sip_pvt *dialog);
2507 /*--- Device object handling */
2508 static struct sip_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime);
2509 static int update_call_counter(struct sip_pvt *fup, int event);
2510 static void sip_destroy_peer(struct sip_peer *peer);
2511 static void sip_destroy_peer_fn(void *peer);
2512 static void set_peer_defaults(struct sip_peer *peer);
2513 static struct sip_peer *temp_peer(const char *name);
2514 static void register_peer_exten(struct sip_peer *peer, int onoff);
2515 static struct sip_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime, int forcenamematch, int devstate_only);
2516 static int sip_poke_peer_s(const void *data);
2517 static enum parse_register_result parse_register_contact(struct sip_pvt *pvt, struct sip_peer *p, struct sip_request *req);
2518 static void reg_source_db(struct sip_peer *peer);
2519 static void destroy_association(struct sip_peer *peer);
2520 static void set_insecure_flags(struct ast_flags *flags, const char *value, int lineno);
2521 static int handle_common_options(struct ast_flags *flags, struct ast_flags *mask, struct ast_variable *v);
2523 /* Realtime device support */
2524 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);
2525 static void update_peer(struct sip_peer *p, int expire);
2526 static struct ast_variable *get_insecure_variable_from_config(struct ast_config *config);
2527 static const char *get_name_from_variable(struct ast_variable *var, const char *newpeername);
2528 static struct sip_peer *realtime_peer(const char *peername, struct sockaddr_in *sin, int devstate_only);
2529 static char *sip_prune_realtime(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
2531 /*--- Internal UA client handling (outbound registrations) */
2532 static void ast_sip_ouraddrfor(struct in_addr *them, struct sockaddr_in *us);
2533 static void sip_registry_destroy(struct sip_registry *reg);
2534 static int sip_register(const char *value, int lineno);
2535 static const char *regstate2str(enum sipregistrystate regstate) attribute_const;
2536 static int sip_reregister(const void *data);
2537 static int __sip_do_register(struct sip_registry *r);
2538 static int sip_reg_timeout(const void *data);
2539 static void sip_send_all_registers(void);
2540 static int sip_reinvite_retry(const void *data);
2542 /*--- Parsing SIP requests and responses */
2543 static void append_date(struct sip_request *req); /* Append date to SIP packet */
2544 static int determine_firstline_parts(struct sip_request *req);
2545 static const struct cfsubscription_types *find_subscription_type(enum subscriptiontype subtype);
2546 static const char *gettag(const struct sip_request *req, const char *header, char *tagbuf, int tagbufsize);
2547 static int find_sip_method(const char *msg);
2548 static unsigned int parse_sip_options(struct sip_pvt *pvt, const char *supported);
2549 static int parse_request(struct sip_request *req);
2550 static const char *get_header(const struct sip_request *req, const char *name);
2551 static const char *referstatus2str(enum referstatus rstatus) attribute_pure;
2552 static int method_match(enum sipmethod id, const char *name);
2553 static void parse_copy(struct sip_request *dst, const struct sip_request *src);
2554 static char *get_in_brackets(char *tmp);
2555 static const char *find_alias(const char *name, const char *_default);
2556 static const char *__get_header(const struct sip_request *req, const char *name, int *start);
2557 static int lws2sws(char *msgbuf, int len);
2558 static void extract_uri(struct sip_pvt *p, struct sip_request *req);
2559 static char *remove_uri_parameters(char *uri);
2560 static int get_refer_info(struct sip_pvt *transferer, struct sip_request *outgoing_req);
2561 static int get_also_info(struct sip_pvt *p, struct sip_request *oreq);
2562 static int parse_ok_contact(struct sip_pvt *pvt, struct sip_request *req);
2563 static int set_address_from_contact(struct sip_pvt *pvt);
2564 static void check_via(struct sip_pvt *p, struct sip_request *req);
2565 static char *get_calleridname(const char *input, char *output, size_t outputsize);
2566 static int get_rpid(struct sip_pvt *p, struct sip_request *oreq);
2567 static int get_rdnis(struct sip_pvt *p, struct sip_request *oreq, char **name, char **number, int *reason);
2568 static int get_destination(struct sip_pvt *p, struct sip_request *oreq);
2569 static int get_msg_text(char *buf, int len, struct sip_request *req, int addnewline);
2570 static int transmit_state_notify(struct sip_pvt *p, int state, int full, int timeout);
2571 static void update_connectedline(struct sip_pvt *p, const void *data, size_t datalen);
2572 static void update_redirecting(struct sip_pvt *p, const void *data, size_t datalen);
2573 static void change_redirecting_information(struct sip_pvt *p, struct sip_request *req, struct ast_party_redirecting *redirecting, int set_call_forward);
2575 /*-- TCP connection handling ---*/
2576 static void *_sip_tcp_helper_thread(struct sip_pvt *pvt, struct ast_tcptls_session_instance *tcptls_session);
2577 static void *sip_tcp_worker_fn(void *);
2579 /*--- Constructing requests and responses */
2580 static void initialize_initreq(struct sip_pvt *p, struct sip_request *req);
2581 static int init_req(struct sip_request *req, int sipmethod, const char *recip);
2582 static int reqprep(struct sip_request *req, struct sip_pvt *p, int sipmethod, int seqno, int newbranch);
2583 static void initreqprep(struct sip_request *req, struct sip_pvt *p, int sipmethod);
2584 static int init_resp(struct sip_request *resp, const char *msg);
2585 static inline int resp_needs_contact(const char *msg, enum sipmethod method);
2586 static int respprep(struct sip_request *resp, struct sip_pvt *p, const char *msg, const struct sip_request *req);
2587 static const struct sockaddr_in *sip_real_dst(const struct sip_pvt *p);
2588 static void build_via(struct sip_pvt *p);
2589 static int create_addr_from_peer(struct sip_pvt *r, struct sip_peer *peer);
2590 static int create_addr(struct sip_pvt *dialog, const char *opeer, struct sockaddr_in *sin, int newdialog);
2591 static char *generate_random_string(char *buf, size_t size);
2592 static void build_callid_pvt(struct sip_pvt *pvt);
2593 static void build_callid_registry(struct sip_registry *reg, struct in_addr ourip, const char *fromdomain);
2594 static void make_our_tag(char *tagbuf, size_t len);
2595 static int add_header(struct sip_request *req, const char *var, const char *value);
2596 static int add_header_contentLength(struct sip_request *req, int len);
2597 static int add_line(struct sip_request *req, const char *line);
2598 static int add_text(struct sip_request *req, const char *text);
2599 static int add_digit(struct sip_request *req, char digit, unsigned int duration, int mode);
2600 static int add_rpid(struct sip_request *req, struct sip_pvt *p);
2601 static int add_vidupdate(struct sip_request *req);
2602 static void add_route(struct sip_request *req, struct sip_route *route);
2603 static int copy_header(struct sip_request *req, const struct sip_request *orig, const char *field);
2604 static int copy_all_header(struct sip_request *req, const struct sip_request *orig, const char *field);
2605 static int copy_via_headers(struct sip_pvt *p, struct sip_request *req, const struct sip_request *orig, const char *field);
2606 static void set_destination(struct sip_pvt *p, char *uri);
2607 static void append_date(struct sip_request *req);
2608 static void build_contact(struct sip_pvt *p);
2610 /*------Request handling functions */
2611 static int handle_incoming(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int *recount, int *nounlock);
2612 static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, struct sockaddr_in *sin, int *recount, char *e, int *nounlock);
2613 static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, int *nounlock);
2614 static int handle_request_bye(struct sip_pvt *p, struct sip_request *req);
2615 static int handle_request_register(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, char *e);
2616 static int handle_request_cancel(struct sip_pvt *p, struct sip_request *req);
2617 static int handle_request_message(struct sip_pvt *p, struct sip_request *req);
2618 static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int seqno, char *e);
2619 static void handle_request_info(struct sip_pvt *p, struct sip_request *req);
2620 static int handle_request_options(struct sip_pvt *p, struct sip_request *req);
2621 static int handle_invite_replaces(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, struct sockaddr_in *sin);
2622 static int handle_request_notify(struct sip_pvt *p, struct sip_request *req, struct sockaddr_in *sin, int seqno, char *e);
2623 static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *current, struct sip_request *req, int seqno);
2625 /*------Response handling functions */
2626 static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
2627 static void handle_response_notify(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
2628 static void handle_response_refer(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
2629 static void handle_response_subscribe(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
2630 static int handle_response_register(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
2631 static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_request *req, int seqno);
2633 /*------ T38 Support --------- */
2634 static int transmit_response_with_t38_sdp(struct sip_pvt *p, char *msg, struct sip_request *req, int retrans);
2635 static struct ast_udptl *sip_get_udptl_peer(struct ast_channel *chan);
2636 static int sip_set_udptl_peer(struct ast_channel *chan, struct ast_udptl *udptl);
2637 static void change_t38_state(struct sip_pvt *p, int state);
2639 /*------ Session-Timers functions --------- */
2640 static void proc_422_rsp(struct sip_pvt *p, struct sip_request *rsp);
2641 static int proc_session_timer(const void *vp);
2642 static void stop_session_timer(struct sip_pvt *p);
2643 static void start_session_timer(struct sip_pvt *p);
2644 static void restart_session_timer(struct sip_pvt *p);
2645 static const char *strefresher2str(enum st_refresher r);
2646 static int parse_session_expires(const char *p_hdrval, int *const p_interval, enum st_refresher *const p_ref);
2647 static int parse_minse(const char *p_hdrval, int *const p_interval);
2648 static int st_get_se(struct sip_pvt *, int max);
2649 static enum st_refresher st_get_refresher(struct sip_pvt *);
2650 static enum st_mode st_get_mode(struct sip_pvt *);
2651 static struct sip_st_dlg* sip_st_alloc(struct sip_pvt *const p);
2653 /*------- RTP Glue functions -------- */
2654 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);
2656 /*!--- SIP MWI Subscription support */
2657 static int sip_subscribe_mwi(const char *value, int lineno);
2658 static void sip_subscribe_mwi_destroy(struct sip_subscription_mwi *mwi);
2659 static void sip_send_all_mwi_subscriptions(void);
2660 static int sip_subscribe_mwi_do(const void *data);
2661 static int __sip_subscribe_mwi_do(struct sip_subscription_mwi *mwi);
2663 /*! \brief Definition of this channel for PBX channel registration */
2664 static const struct ast_channel_tech sip_tech = {
2666 .description = "Session Initiation Protocol (SIP)",
2667 .capabilities = AST_FORMAT_AUDIO_MASK, /* all audio formats */
2668 .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
2669 .requester = sip_request_call, /* called with chan unlocked */
2670 .devicestate = sip_devicestate, /* called with chan unlocked (not chan-specific) */
2671 .call = sip_call, /* called with chan locked */
2672 .send_html = sip_sendhtml,
2673 .hangup = sip_hangup, /* called with chan locked */
2674 .answer = sip_answer, /* called with chan locked */
2675 .read = sip_read, /* called with chan locked */
2676 .write = sip_write, /* called with chan locked */
2677 .write_video = sip_write, /* called with chan locked */
2678 .write_text = sip_write,
2679 .indicate = sip_indicate, /* called with chan locked */
2680 .transfer = sip_transfer, /* called with chan locked */
2681 .fixup = sip_fixup, /* called with chan locked */
2682 .send_digit_begin = sip_senddigit_begin, /* called with chan unlocked */
2683 .send_digit_end = sip_senddigit_end,
2684 .bridge = ast_rtp_instance_bridge, /* XXX chan unlocked ? */
2685 .early_bridge = ast_rtp_instance_early_bridge,
2686 .send_text = sip_sendtext, /* called with chan locked */
2687 .func_channel_read = acf_channel_read,
2688 .setoption = sip_setoption,
2689 .queryoption = sip_queryoption,
2690 .get_pvt_uniqueid = sip_get_callid,
2693 /*! \brief This version of the sip channel tech has no send_digit_begin
2694 * callback so that the core knows that the channel does not want
2695 * DTMF BEGIN frames.
2696 * The struct is initialized just before registering the channel driver,
2697 * and is for use with channels using SIP INFO DTMF.
2699 static struct ast_channel_tech sip_tech_info;
2702 /*! \brief Working TLS connection configuration */
2703 static struct ast_tls_config sip_tls_cfg;
2705 /*! \brief Default TLS connection configuration */
2706 static struct ast_tls_config default_tls_cfg;
2708 /*! \brief The TCP server definition */
2709 static struct ast_tcptls_session_args sip_tcp_desc = {
2711 .master = AST_PTHREADT_NULL,
2714 .name = "SIP TCP server",
2715 .accept_fn = ast_tcptls_server_root,
2716 .worker_fn = sip_tcp_worker_fn,
2719 /*! \brief The TCP/TLS server definition */
2720 static struct ast_tcptls_session_args sip_tls_desc = {
2722 .master = AST_PTHREADT_NULL,
2723 .tls_cfg = &sip_tls_cfg,
2725 .name = "SIP TLS server",
2726 .accept_fn = ast_tcptls_server_root,
2727 .worker_fn = sip_tcp_worker_fn,
2730 /* wrapper macro to tell whether t points to one of the sip_tech descriptors */
2731 #define IS_SIP_TECH(t) ((t) == &sip_tech || (t) == &sip_tech_info)
2733 /*! \brief map from an integer value to a string.
2734 * If no match is found, return errorstring
2736 static const char *map_x_s(const struct _map_x_s *table, int x, const char *errorstring)
2738 const struct _map_x_s *cur;
2740 for (cur = table; cur->s; cur++)
2746 /*! \brief map from a string to an integer value, case insensitive.
2747 * If no match is found, return errorvalue.
2749 static int map_s_x(const struct _map_x_s *table, const char *s, int errorvalue)
2751 const struct _map_x_s *cur;
2753 for (cur = table; cur->s; cur++)
2754 if (!strcasecmp(cur->s, s))
2760 * duplicate a list of channel variables, \return the copy.
2762 static struct ast_variable *copy_vars(struct ast_variable *src)
2764 struct ast_variable *res = NULL, *tmp, *v = NULL;
2766 for (v = src ; v ; v = v->next) {
2767 if ((tmp = ast_variable_new(v->name, v->value, v->file))) {
2775 /*! \brief SIP TCP connection handler */
2776 static void *sip_tcp_worker_fn(void *data)
2778 struct ast_tcptls_session_instance *tcptls_session = data;
2780 return _sip_tcp_helper_thread(NULL, tcptls_session);
2783 /*! \brief SIP TCP thread management function
2784 This function reads from the socket, parses the packet into a request
2786 static void *_sip_tcp_helper_thread(struct sip_pvt *pvt, struct ast_tcptls_session_instance *tcptls_session)
2789 struct sip_request req = { 0, } , reqcpy = { 0, };
2790 struct sip_threadinfo *me;
2791 char buf[1024] = "";
2793 me = ast_calloc(1, sizeof(*me));
2798 me->threadid = pthread_self();
2799 me->tcptls_session = tcptls_session;
2800 if (tcptls_session->ssl)
2801 me->type = SIP_TRANSPORT_TLS;
2803 me->type = SIP_TRANSPORT_TCP;
2805 ast_debug(2, "Starting thread for %s server\n", tcptls_session->ssl ? "SSL" : "TCP");
2807 AST_LIST_LOCK(&threadl);
2808 AST_LIST_INSERT_TAIL(&threadl, me, list);
2809 AST_LIST_UNLOCK(&threadl);
2811 if (!(req.data = ast_str_create(SIP_MIN_PACKET)))
2813 if (!(reqcpy.data = ast_str_create(SIP_MIN_PACKET)))
2817 struct ast_str *str_save;
2819 str_save = req.data;
2820 memset(&req, 0, sizeof(req));
2821 req.data = str_save;
2822 ast_str_reset(req.data);
2824 str_save = reqcpy.data;
2825 memset(&reqcpy, 0, sizeof(reqcpy));
2826 reqcpy.data = str_save;
2827 ast_str_reset(reqcpy.data);
2829 req.socket.fd = tcptls_session->fd;
2830 if (tcptls_session->ssl) {
2831 req.socket.type = SIP_TRANSPORT_TLS;
2832 req.socket.port = htons(ourport_tls);
2834 req.socket.type = SIP_TRANSPORT_TCP;
2835 req.socket.port = htons(ourport_tcp);
2837 res = ast_wait_for_input(tcptls_session->fd, -1);
2839 ast_debug(2, "SIP %s server :: ast_wait_for_input returned %d\n", tcptls_session->ssl ? "SSL": "TCP", res);
2843 /* Read in headers one line at a time */
2844 while (req.len < 4 || strncmp(REQ_OFFSET_TO_STR(&req, len - 4), "\r\n\r\n", 4)) {
2845 ast_mutex_lock(&tcptls_session->lock);
2846 if (!fgets(buf, sizeof(buf), tcptls_session->f)) {
2847 ast_mutex_unlock(&tcptls_session->lock);
2850 ast_mutex_unlock(&tcptls_session->lock);
2853 ast_str_append(&req.data, 0, "%s", buf);
2854 req.len = req.data->used;
2856 copy_request(&reqcpy, &req);
2857 parse_request(&reqcpy);
2858 /* In order to know how much to read, we need the content-length header */
2859 if (sscanf(get_header(&reqcpy, "Content-Length"), "%d", &cl)) {
2861 ast_mutex_lock(&tcptls_session->lock);
2862 if (!fread(buf, (cl < sizeof(buf)) ? cl : sizeof(buf), 1, tcptls_session->f)) {
2863 ast_mutex_unlock(&tcptls_session->lock);
2866 ast_mutex_unlock(&tcptls_session->lock);
2870 ast_str_append(&req.data, 0, "%s", buf);
2871 req.len = req.data->used;
2874 /*! \todo XXX If there's no Content-Length or if the content-length and what
2875 we receive is not the same - we should generate an error */
2877 req.socket.tcptls_session = tcptls_session;
2878 handle_request_do(&req, &tcptls_session->remote_address);
2882 AST_LIST_LOCK(&threadl);
2883 AST_LIST_REMOVE(&threadl, me, list);
2884 AST_LIST_UNLOCK(&threadl);
2887 fclose(tcptls_session->f);
2888 tcptls_session->f = NULL;
2889 tcptls_session->fd = -1;
2891 ast_free(reqcpy.data);
2899 ast_debug(2, "Shutting down thread for %s server\n", tcptls_session->ssl ? "SSL" : "TCP");
2902 ao2_ref(tcptls_session, -1);
2903 tcptls_session = NULL;
2910 * helper functions to unreference various types of objects.
2911 * By handling them this way, we don't have to declare the
2912 * destructor on each call, which removes the chance of errors.
2914 static void *unref_peer(struct sip_peer *peer, char *tag)
2916 ao2_t_ref(peer, -1, tag);
2920 static struct sip_peer *ref_peer(struct sip_peer *peer, char *tag)
2922 ao2_t_ref(peer, 1, tag);
2926 /*! \brief maintain proper refcounts for a sip_pvt's outboundproxy
2928 * This function sets pvt's outboundproxy pointer to the one referenced
2929 * by the proxy parameter. Because proxy may be a refcounted object, and
2930 * because pvt's old outboundproxy may also be a refcounted object, we need
2931 * to maintain the proper refcounts.
2933 * \param pvt The sip_pvt for which we wish to set the outboundproxy
2934 * \param proxy The sip_proxy which we will point pvt towards.
2935 * \return Returns void
2937 static void ref_proxy(struct sip_pvt *pvt, struct sip_proxy *proxy)
2939 struct sip_proxy *old_obproxy = pvt->outboundproxy;
2940 /* The sip_cfg.outboundproxy is statically allocated, and so
2941 * we don't ever need to adjust refcounts for it