Expand the caller ANI field to an ast_party_id
[asterisk/asterisk.git] / channels / chan_mgcp.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2006, Digium, Inc.
5  *
6  * Mark Spencer <markster@digium.com>
7  *
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.
13  *
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.
17  */
18
19 /*! \file
20  *
21  * \brief Implementation of Media Gateway Control Protocol
22  *
23  * \author Mark Spencer <markster@digium.com>
24  *
25  * \par See also
26  * \arg \ref Config_mgcp
27  * \arg \ref res_pktccops
28  *
29  * \ingroup channel_drivers
30  */
31
32 /*** MODULEINFO
33         <depend>res_pktccops</depend>
34  ***/
35
36 #include "asterisk.h"
37
38 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
39
40 #include <sys/socket.h>
41 #include <sys/ioctl.h>
42 #include <net/if.h>
43 #include <fcntl.h>
44 #include <netdb.h>
45 #include <sys/signal.h>
46 #include <signal.h>
47 #include <netinet/in.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/ip.h>
50 #include <arpa/inet.h>
51 #include <ctype.h>
52
53 #include "asterisk/lock.h"
54 #include "asterisk/channel.h"
55 #include "asterisk/config.h"
56 #include "asterisk/module.h"
57 #include "asterisk/pbx.h"
58 #include "asterisk/sched.h"
59 #include "asterisk/io.h"
60 #include "asterisk/rtp_engine.h"
61 #include "asterisk/acl.h"
62 #include "asterisk/callerid.h"
63 #include "asterisk/cli.h"
64 #include "asterisk/say.h"
65 #include "asterisk/cdr.h"
66 #include "asterisk/astdb.h"
67 #include "asterisk/features.h"
68 #include "asterisk/app.h"
69 #include "asterisk/musiconhold.h"
70 #include "asterisk/utils.h"
71 #include "asterisk/netsock.h"
72 #include "asterisk/causes.h"
73 #include "asterisk/dsp.h"
74 #include "asterisk/devicestate.h"
75 #include "asterisk/stringfields.h"
76 #include "asterisk/abstract_jb.h"
77 #include "asterisk/event.h"
78 #include "asterisk/chanvars.h"
79 #include "asterisk/pktccops.h"
80
81 /*
82  * Define to work around buggy dlink MGCP phone firmware which
83  * appears not to know that "rt" is part of the "G" package.
84  */
85 /* #define DLINK_BUGGY_FIRMWARE */
86
87 #define MGCPDUMPER
88 #define DEFAULT_EXPIRY  120
89 #define MAX_EXPIRY      3600
90 #define DIRECTMEDIA     1
91
92 #ifndef INADDR_NONE
93 #define INADDR_NONE (in_addr_t)(-1)
94 #endif
95
96 /*! Global jitterbuffer configuration - by default, jb is disabled */
97 static struct ast_jb_conf default_jbconf =
98 {
99         .flags = 0,
100         .max_size = -1,
101         .resync_threshold = -1,
102         .impl = "",
103         .target_extra = -1,
104 };
105 static struct ast_jb_conf global_jbconf;
106
107 static const char tdesc[] = "Media Gateway Control Protocol (MGCP)";
108 static const char config[] = "mgcp.conf";
109
110 #define MGCP_DTMF_RFC2833       (1 << 0)
111 #define MGCP_DTMF_INBAND        (1 << 1)
112 #define MGCP_DTMF_HYBRID        (1 << 2)
113
114 #define DEFAULT_MGCP_GW_PORT    2427 /*!< From RFC 2705 */
115 #define DEFAULT_MGCP_CA_PORT    2727 /*!< From RFC 2705 */
116 #define MGCP_MAX_PACKET         1500 /*!< Also from RFC 2543, should sub headers tho */
117 #define DEFAULT_RETRANS         1000 /*!< How frequently to retransmit */
118 #define MAX_RETRANS             5    /*!< Try only 5 times for retransmissions */
119
120 /*! MGCP rtp stream modes { */
121 #define MGCP_CX_SENDONLY        0
122 #define MGCP_CX_RECVONLY        1
123 #define MGCP_CX_SENDRECV        2
124 #define MGCP_CX_CONF            3
125 #define MGCP_CX_CONFERENCE      3
126 #define MGCP_CX_MUTE            4
127 #define MGCP_CX_INACTIVE        4
128 /*! } */
129
130 static const char * const mgcp_cxmodes[] = {
131         "sendonly",
132         "recvonly",
133         "sendrecv",
134         "confrnce",
135         "inactive"
136 };
137
138 enum {
139         MGCP_CMD_EPCF,
140         MGCP_CMD_CRCX,
141         MGCP_CMD_MDCX,
142         MGCP_CMD_DLCX,
143         MGCP_CMD_RQNT,
144         MGCP_CMD_NTFY,
145         MGCP_CMD_AUEP,
146         MGCP_CMD_AUCX,
147         MGCP_CMD_RSIP
148 };
149
150 static char context[AST_MAX_EXTENSION] = "default";
151
152 static char language[MAX_LANGUAGE] = "";
153 static char musicclass[MAX_MUSICCLASS] = "";
154 static char parkinglot[AST_MAX_CONTEXT];
155 static char cid_num[AST_MAX_EXTENSION] = "";
156 static char cid_name[AST_MAX_EXTENSION] = "";
157
158 static int dtmfmode = 0;
159 static int nat = 0;
160 static int ncs = 0;
161 static int pktcgatealloc = 0;
162 static int hangupongateremove = 0;
163
164 static ast_group_t cur_callergroup = 0;
165 static ast_group_t cur_pickupgroup = 0;
166
167 static struct {
168         unsigned int tos;
169         unsigned int tos_audio;
170         unsigned int cos;
171         unsigned int cos_audio;
172 } qos = { 0, 0, 0, 0 };
173
174 static int immediate = 0;
175
176 static int callwaiting = 0;
177
178 static int callreturn = 0;
179
180 static int slowsequence = 0;
181
182 static int threewaycalling = 0;
183
184 /*! This is for flashhook transfers */
185 static int transfer = 0;
186
187 static int cancallforward = 0;
188
189 static int singlepath = 0;
190
191 static int directmedia = DIRECTMEDIA;
192
193 static char accountcode[AST_MAX_ACCOUNT_CODE] = "";
194
195 static char mailbox[AST_MAX_EXTENSION];
196
197 static int amaflags = 0;
198
199 static int adsi = 0;
200
201 static unsigned int oseq;
202
203 /*! Wait up to 16 seconds for first digit (FXO logic) */
204 static int firstdigittimeout = 16000;
205
206 /*! How long to wait for following digits (FXO logic) */
207 static int gendigittimeout = 8000;
208
209 /*! How long to wait for an extra digit, if there is an ambiguous match */
210 static int matchdigittimeout = 3000;
211
212 /*! Protect the monitoring thread, so only one process can kill or start it, and not
213     when it's doing something critical. */
214 AST_MUTEX_DEFINE_STATIC(netlock);
215
216 AST_MUTEX_DEFINE_STATIC(monlock);
217
218 /*! This is the thread for the monitor which checks for input on the channels
219  *  which are not currently in use.
220  */
221 static pthread_t monitor_thread = AST_PTHREADT_NULL;
222
223 static int restart_monitor(void);
224
225 static format_t capability = AST_FORMAT_ULAW;
226 static int nonCodecCapability = AST_RTP_DTMF;
227
228 static char ourhost[MAXHOSTNAMELEN];
229 static struct in_addr __ourip;
230 static int ourport;
231
232 static int mgcpdebug = 0;
233
234 static struct sched_context *sched;
235 static struct io_context *io;
236 /*! The private structures of the mgcp channels are linked for
237  * selecting outgoing channels
238  */
239
240 #define MGCP_MAX_HEADERS        64
241 #define MGCP_MAX_LINES          64
242
243 struct mgcp_request {
244         int len;
245         char *verb;
246         char *identifier;
247         char *endpoint;
248         char *version;
249         int headers;                    /*!< MGCP Headers */
250         char *header[MGCP_MAX_HEADERS];
251         int lines;                      /*!< SDP Content */
252         char *line[MGCP_MAX_LINES];
253         char data[MGCP_MAX_PACKET];
254         int cmd;                        /*!< int version of verb = command */
255         unsigned int trid;              /*!< int version of identifier = transaction id */
256         struct mgcp_request *next;      /*!< next in the queue */
257 };
258
259 /*! \brief mgcp_message: MGCP message for queuing up */
260 struct mgcp_message {
261         struct mgcp_endpoint *owner_ep;
262         struct mgcp_subchannel *owner_sub;
263         int retrans;
264         unsigned long expire;
265         unsigned int seqno;
266         int len;
267         struct mgcp_message *next;
268         char buf[0];
269 };
270
271 #define RESPONSE_TIMEOUT 30     /*!< in seconds */
272
273 struct mgcp_response {
274         time_t whensent;
275         int len;
276         int seqno;
277         struct mgcp_response *next;
278         char buf[0];
279 };
280
281 #define MAX_SUBS 2
282
283 #define SUB_REAL 0
284 #define SUB_ALT  1
285
286 struct mgcp_subchannel {
287         /*! subchannel magic string.
288            Needed to prove that any subchannel pointer passed by asterisk
289            really points to a valid subchannel memory area.
290            Ugly.. But serves the purpose for the time being.
291          */
292 #define MGCP_SUBCHANNEL_MAGIC "!978!"
293         char magic[6];
294         ast_mutex_t lock;
295         int id;
296         struct ast_channel *owner;
297         struct mgcp_endpoint *parent;
298         struct ast_rtp_instance *rtp;
299         struct sockaddr_in tmpdest;
300         char txident[80]; /*! \todo FIXME txident is replaced by rqnt_ident in endpoint.
301                         This should be obsoleted */
302         char cxident[80];
303         char callid[80];
304         int cxmode;
305         struct mgcp_request *cx_queue; /*!< pending CX commands */
306         ast_mutex_t cx_queue_lock;     /*!< CX queue lock */
307         int nat;
308         int iseq;                      /*!< Not used? RTP? */
309         int outgoing;
310         int alreadygone;
311         int sdpsent;
312         struct cops_gate *gate;
313         struct mgcp_subchannel *next;  /*!< for out circular linked list */
314 };
315
316 #define MGCP_ONHOOK  1
317 #define MGCP_OFFHOOK 2
318
319 #define TYPE_TRUNK 1
320 #define TYPE_LINE  2
321
322 struct mgcp_endpoint {
323         ast_mutex_t lock;
324         char name[80];
325         struct mgcp_subchannel *sub;            /*!< Pointer to our current connection, channel and stuff */
326         char accountcode[AST_MAX_ACCOUNT_CODE];
327         char exten[AST_MAX_EXTENSION];          /*!< Extention where to start */
328         char context[AST_MAX_EXTENSION];
329         char language[MAX_LANGUAGE];
330         char cid_num[AST_MAX_EXTENSION];        /*!< Caller*ID number */
331         char cid_name[AST_MAX_EXTENSION];       /*!< Caller*ID name */
332         char lastcallerid[AST_MAX_EXTENSION];   /*!< Last Caller*ID */
333         char dtmf_buf[AST_MAX_EXTENSION];       /*!< place to collect digits be */
334         char call_forward[AST_MAX_EXTENSION];   /*!< Last Caller*ID */
335         char musicclass[MAX_MUSICCLASS];
336         char curtone[80];                       /*!< Current tone */
337         char mailbox[AST_MAX_EXTENSION];
338         char parkinglot[AST_MAX_CONTEXT];   /*!< Parkinglot */
339         struct ast_event_sub *mwi_event_sub;
340         ast_group_t callgroup;
341         ast_group_t pickupgroup;
342         int callwaiting;
343         int hascallwaiting;
344         int transfer;
345         int threewaycalling;
346         int singlepath;
347         int cancallforward;
348         int directmedia;
349         int callreturn;
350         int dnd; /* How does this affect callwait? Do we just deny a mgcp_request if we're dnd? */
351         int hascallerid;
352         int hidecallerid;
353         int dtmfmode;
354         int amaflags;
355         int ncs;
356         int pktcgatealloc;
357         int hangupongateremove;
358         int type;
359         int slowsequence;                       /*!< MS: Sequence the endpoint as a whole */
360         int group;
361         int iseq; /*!< Not used? */
362         int lastout; /*!< tracking this on the subchannels.  Is it needed here? */
363         int needdestroy; /*!< Not used? */
364         format_t capability;
365         int nonCodecCapability;
366         int onhooktime;
367         int msgstate; /*!< voicemail message state */
368         int immediate;
369         int hookstate;
370         int adsi;
371         char rqnt_ident[80];             /*!< request identifier */
372         struct mgcp_request *rqnt_queue; /*!< pending RQNT commands */
373         ast_mutex_t rqnt_queue_lock;
374         struct mgcp_request *cmd_queue;  /*!< pending commands other than RQNT */
375         ast_mutex_t cmd_queue_lock;
376         int delme;                       /*!< needed for reload */
377         int needaudit;                   /*!< needed for reload */
378         struct ast_dsp *dsp; /*!< XXX Should there be a dsp/subchannel? XXX */
379         /* owner is tracked on the subchannels, and the *sub indicates whos in charge */
380         /* struct ast_channel *owner; */
381         /* struct ast_rtp *rtp; */
382         /* struct sockaddr_in tmpdest; */
383         /* message go the the endpoint and not the channel so they stay here */
384         struct ast_variable *chanvars;          /*!< Variables to set for channel created by user */
385         struct mgcp_endpoint *next;
386         struct mgcp_gateway *parent;
387 };
388
389 static struct mgcp_gateway {
390         /* A gateway containing one or more endpoints */
391         char name[80];
392         int isnamedottedip; /*!< is the name FQDN or dotted ip */
393         struct sockaddr_in addr;
394         struct sockaddr_in defaddr;
395         struct in_addr ourip;
396         int dynamic;
397         int expire;             /*!< XXX Should we ever expire dynamic registrations? XXX */
398         struct mgcp_endpoint *endpoints;
399         struct ast_ha *ha;
400 /* obsolete
401         time_t lastouttime;
402         int lastout;
403         int messagepending;
404 */
405 /* Wildcard endpoint name */
406         char wcardep[30];
407         struct mgcp_message *msgs; /*!< gw msg queue */
408         ast_mutex_t msgs_lock;     /*!< queue lock */
409         int retransid;             /*!< retrans timer id */
410         int delme;                 /*!< needed for reload */
411         int realtime;
412         struct mgcp_response *responses;
413         struct mgcp_gateway *next;
414 } *gateways = NULL;
415
416 AST_MUTEX_DEFINE_STATIC(mgcp_reload_lock);
417 static int mgcp_reloading = 0;
418
419 /*! \brief gatelock: mutex for gateway/endpoint lists */
420 AST_MUTEX_DEFINE_STATIC(gatelock);
421
422 static int mgcpsock  = -1;
423
424 static struct sockaddr_in bindaddr;
425
426 static struct ast_frame  *mgcp_read(struct ast_channel *ast);
427 static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest);
428 static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone);
429 static int transmit_modify_request(struct mgcp_subchannel *sub);
430 static int transmit_connect(struct mgcp_subchannel *sub);
431 static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername);
432 static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp, format_t codecs);
433 static int transmit_connection_del(struct mgcp_subchannel *sub);
434 static int transmit_audit_endpoint(struct mgcp_endpoint *p);
435 static void start_rtp(struct mgcp_subchannel *sub);
436 static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
437                             int result, unsigned int ident, struct mgcp_request *resp);
438 static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *sub);
439 static char *mgcp_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
440 static int reload_config(int reload);
441
442 static struct ast_channel *mgcp_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause);
443 static int mgcp_call(struct ast_channel *ast, char *dest, int timeout);
444 static int mgcp_hangup(struct ast_channel *ast);
445 static int mgcp_answer(struct ast_channel *ast);
446 static struct ast_frame *mgcp_read(struct ast_channel *ast);
447 static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame);
448 static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen);
449 static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
450 static int mgcp_senddigit_begin(struct ast_channel *ast, char digit);
451 static int mgcp_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration);
452 static int mgcp_devicestate(void *data);
453 static void add_header_offhook(struct mgcp_subchannel *sub, struct mgcp_request *resp, char *tone);
454 static int transmit_connect_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp);
455 static struct mgcp_gateway *build_gateway(char *cat, struct ast_variable *v);
456 static int mgcp_alloc_pktcgate(struct mgcp_subchannel *sub);
457 static int acf_channel_read(struct ast_channel *chan, const char *funcname, char *preparse, char *buf, size_t buflen);
458 static struct ast_variable *add_var(const char *buf, struct ast_variable *list);
459 static struct ast_variable *copy_vars(struct ast_variable *src);
460
461 static const struct ast_channel_tech mgcp_tech = {
462         .type = "MGCP",
463         .description = tdesc,
464         .capabilities = AST_FORMAT_ULAW | AST_FORMAT_ALAW,
465         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
466         .requester = mgcp_request,
467         .devicestate = mgcp_devicestate,
468         .call = mgcp_call,
469         .hangup = mgcp_hangup,
470         .answer = mgcp_answer,
471         .read = mgcp_read,
472         .write = mgcp_write,
473         .indicate = mgcp_indicate,
474         .fixup = mgcp_fixup,
475         .send_digit_begin = mgcp_senddigit_begin,
476         .send_digit_end = mgcp_senddigit_end,
477         .bridge = ast_rtp_instance_bridge,
478         .func_channel_read = acf_channel_read,
479 };
480
481 static void mwi_event_cb(const struct ast_event *event, void *userdata)
482 {
483         /* This module does not handle MWI in an event-based manner.  However, it
484          * subscribes to MWI for each mailbox that is configured so that the core
485          * knows that we care about it.  Then, chan_mgcp will get the MWI from the
486          * event cache instead of checking the mailbox directly. */
487 }
488
489 static int has_voicemail(struct mgcp_endpoint *p)
490 {
491         int new_msgs;
492         struct ast_event *event;
493         char *mbox, *cntx;
494
495         cntx = mbox = ast_strdupa(p->mailbox);
496         strsep(&cntx, "@");
497         if (ast_strlen_zero(cntx))
498                 cntx = "default";
499
500         event = ast_event_get_cached(AST_EVENT_MWI,
501                 AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, mbox,
502                 AST_EVENT_IE_CONTEXT, AST_EVENT_IE_PLTYPE_STR, cntx,
503                 AST_EVENT_IE_END);
504
505         if (event) {
506                 new_msgs = ast_event_get_ie_uint(event, AST_EVENT_IE_NEWMSGS);
507                 ast_event_destroy(event);
508         } else
509                 new_msgs = ast_app_has_voicemail(p->mailbox, NULL);
510
511         return new_msgs;
512 }
513
514 static int unalloc_sub(struct mgcp_subchannel *sub)
515 {
516         struct mgcp_endpoint *p = sub->parent;
517         if (p->sub == sub) {
518                 ast_log(LOG_WARNING, "Trying to unalloc the real channel %s@%s?!?\n", p->name, p->parent->name);
519                 return -1;
520         }
521         ast_debug(1, "Released sub %d of channel %s@%s\n", sub->id, p->name, p->parent->name);
522
523         sub->owner = NULL;
524         if (!ast_strlen_zero(sub->cxident)) {
525                 transmit_connection_del(sub);
526         }
527         sub->cxident[0] = '\0';
528         sub->callid[0] = '\0';
529         sub->cxmode = MGCP_CX_INACTIVE;
530         sub->outgoing = 0;
531         sub->alreadygone = 0;
532         memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
533         if (sub->rtp) {
534                 ast_rtp_instance_destroy(sub->rtp);
535                 sub->rtp = NULL;
536         }
537         dump_cmd_queues(NULL, sub);
538         return 0;
539 }
540
541 /* modified for new transport mechanism */
542 static int __mgcp_xmit(struct mgcp_gateway *gw, char *data, int len)
543 {
544         int res;
545         if (gw->addr.sin_addr.s_addr)
546                 res=sendto(mgcpsock, data, len, 0, (struct sockaddr *)&gw->addr, sizeof(struct sockaddr_in));
547         else
548                 res=sendto(mgcpsock, data, len, 0, (struct sockaddr *)&gw->defaddr, sizeof(struct sockaddr_in));
549         if (res != len) {
550                 ast_log(LOG_WARNING, "mgcp_xmit returned %d: %s\n", res, strerror(errno));
551         }
552         return res;
553 }
554
555 static int resend_response(struct mgcp_subchannel *sub, struct mgcp_response *resp)
556 {
557         struct mgcp_endpoint *p = sub->parent;
558         int res;
559         ast_debug(1, "Retransmitting:\n%s\n to %s:%d\n", resp->buf, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
560         res = __mgcp_xmit(p->parent, resp->buf, resp->len);
561         if (res > 0)
562                 res = 0;
563         return res;
564 }
565
566 static int send_response(struct mgcp_subchannel *sub, struct mgcp_request *req)
567 {
568         struct mgcp_endpoint *p = sub->parent;
569         int res;
570         ast_debug(1, "Transmitting:\n%s\n to %s:%d\n", req->data, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
571         res = __mgcp_xmit(p->parent, req->data, req->len);
572         if (res > 0)
573                 res = 0;
574         return res;
575 }
576
577 /* modified for new transport framework */
578 static void dump_queue(struct mgcp_gateway *gw, struct mgcp_endpoint *p)
579 {
580         struct mgcp_message *cur, *q = NULL, *w, *prev;
581
582         ast_mutex_lock(&gw->msgs_lock);
583         for (prev = NULL, cur = gw->msgs; cur; prev = cur, cur = cur->next) {
584                 if (!p || cur->owner_ep == p) {
585                         if (prev) {
586                                 prev->next = cur->next;
587                         } else {
588                                 gw->msgs = cur->next;
589                         }
590
591                         ast_log(LOG_NOTICE, "Removing message from %s transaction %u\n",
592                                 gw->name, cur->seqno);
593
594                         w = cur;
595                         if (q) {
596                                 w->next = q;
597                         } else {
598                                 w->next = NULL;
599                         }
600                         q = w;
601                 }
602         }
603         ast_mutex_unlock(&gw->msgs_lock);
604
605         while (q) {
606                 cur = q;
607                 q = q->next;
608                 ast_free(cur);
609         }
610 }
611
612 static void mgcp_queue_frame(struct mgcp_subchannel *sub, struct ast_frame *f)
613 {
614         for (;;) {
615                 if (sub->owner) {
616                         if (!ast_channel_trylock(sub->owner)) {
617                                 ast_queue_frame(sub->owner, f);
618                                 ast_channel_unlock(sub->owner);
619                                 break;
620                         } else {
621                                 DEADLOCK_AVOIDANCE(&sub->lock);
622                         }
623                 } else {
624                         break;
625                 }
626         }
627 }
628
629 static void mgcp_queue_hangup(struct mgcp_subchannel *sub)
630 {
631         for (;;) {
632                 if (sub->owner) {
633                         if (!ast_channel_trylock(sub->owner)) {
634                                 ast_queue_hangup(sub->owner);
635                                 ast_channel_unlock(sub->owner);
636                                 break;
637                         } else {
638                                 DEADLOCK_AVOIDANCE(&sub->lock);
639                         }
640                 } else {
641                         break;
642                 }
643         }
644 }
645
646 static void mgcp_queue_control(struct mgcp_subchannel *sub, int control)
647 {
648         struct ast_frame f = { AST_FRAME_CONTROL, { control } };
649         return mgcp_queue_frame(sub, &f);
650 }
651
652 static int retrans_pkt(const void *data)
653 {
654         struct mgcp_gateway *gw = (struct mgcp_gateway *)data;
655         struct mgcp_message *cur, *exq = NULL, *w, *prev;
656         int res = 0;
657
658         /* find out expired msgs */
659         ast_mutex_lock(&gw->msgs_lock);
660
661         for (prev = NULL, cur = gw->msgs; cur; prev = cur, cur = cur->next) {
662                 if (cur->retrans < MAX_RETRANS) {
663                         cur->retrans++;
664                         ast_debug(1, "Retransmitting #%d transaction %u on [%s]\n",
665                                 cur->retrans, cur->seqno, gw->name);
666                         __mgcp_xmit(gw, cur->buf, cur->len);
667                 } else {
668                         if (prev)
669                                 prev->next = cur->next;
670                         else
671                                 gw->msgs = cur->next;
672
673                         ast_log(LOG_WARNING, "Maximum retries exceeded for transaction %u on [%s]\n",
674                                 cur->seqno, gw->name);
675
676                         w = cur;
677
678                         if (exq) {
679                                 w->next = exq;
680                         } else {
681                                 w->next = NULL;
682                         }
683                         exq = w;
684                 }
685         }
686
687         if (!gw->msgs) {
688                 gw->retransid = -1;
689                 res = 0;
690         } else {
691                 res = 1;
692         }
693         ast_mutex_unlock(&gw->msgs_lock);
694
695         while (exq) {
696                 cur = exq;
697                 /* time-out transaction */
698                 handle_response(cur->owner_ep, cur->owner_sub, 406, cur->seqno, NULL);
699                 exq = exq->next;
700                 ast_free(cur);
701         }
702
703         return res;
704 }
705
706 /* modified for the new transaction mechanism */
707 static int mgcp_postrequest(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
708                             char *data, int len, unsigned int seqno)
709 {
710         struct mgcp_message *msg;
711         struct mgcp_message *cur;
712         struct mgcp_gateway *gw;
713         struct timeval now;
714
715         if (!(msg = ast_malloc(sizeof(*msg) + len))) {
716                 return -1;
717         }
718         if (!(gw = ((p && p->parent) ? p->parent : NULL))) {
719                 ast_free(msg);
720                 return -1;
721         }
722
723         msg->owner_sub = sub;
724         msg->owner_ep = p;
725         msg->seqno = seqno;
726         msg->next = NULL;
727         msg->len = len;
728         msg->retrans = 0;
729         memcpy(msg->buf, data, msg->len);
730
731         ast_mutex_lock(&gw->msgs_lock);
732         for (cur = gw->msgs; cur && cur->next; cur = cur->next);
733         if (cur) {
734                 cur->next = msg;
735         } else {
736                 gw->msgs = msg;
737         }
738
739         now = ast_tvnow();
740         msg->expire = now.tv_sec * 1000 + now.tv_usec / 1000 + DEFAULT_RETRANS;
741
742         if (gw->retransid == -1)
743                 gw->retransid = ast_sched_add(sched, DEFAULT_RETRANS, retrans_pkt, (void *)gw);
744         ast_mutex_unlock(&gw->msgs_lock);
745         __mgcp_xmit(gw, msg->buf, msg->len);
746         /* XXX Should schedule retransmission XXX */
747         return 0;
748 }
749
750 /* modified for new transport */
751 static int send_request(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
752                         struct mgcp_request *req, unsigned int seqno)
753 {
754         int res = 0;
755         struct mgcp_request **queue, *q, *r, *t;
756         ast_mutex_t *l;
757
758         ast_debug(1, "Slow sequence is %d\n", p->slowsequence);
759         if (p->slowsequence) {
760                 queue = &p->cmd_queue;
761                 l = &p->cmd_queue_lock;
762                 ast_mutex_lock(l);
763         } else {
764                 switch (req->cmd) {
765                 case MGCP_CMD_DLCX:
766                         queue = &sub->cx_queue;
767                         l = &sub->cx_queue_lock;
768                         ast_mutex_lock(l);
769                         q = sub->cx_queue;
770                         /* delete pending cx cmds */
771                         /* buggy sb5120 */
772                         if (!sub->parent->ncs) {
773                                 while (q) {
774                                         r = q->next;
775                                         ast_free(q);
776                                         q = r;
777                                 }
778                                 *queue = NULL;
779                         }
780                         break;
781
782                 case MGCP_CMD_CRCX:
783                 case MGCP_CMD_MDCX:
784                         queue = &sub->cx_queue;
785                         l = &sub->cx_queue_lock;
786                         ast_mutex_lock(l);
787                         break;
788
789                 case MGCP_CMD_RQNT:
790                         queue = &p->rqnt_queue;
791                         l = &p->rqnt_queue_lock;
792                         ast_mutex_lock(l);
793                         break;
794
795                 default:
796                         queue = &p->cmd_queue;
797                         l = &p->cmd_queue_lock;
798                         ast_mutex_lock(l);
799                         break;
800                 }
801         }
802
803         if (!(r = ast_malloc(sizeof(*r)))) {
804                 ast_log(LOG_WARNING, "Cannot post MGCP request: insufficient memory\n");
805                 ast_mutex_unlock(l);
806                 return -1;
807         }
808         memcpy(r, req, sizeof(*r));
809
810         if (!(*queue)) {
811                 ast_debug(1, "Posting Request:\n%s to %s:%d\n", req->data,
812                         ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
813
814                 res = mgcp_postrequest(p, sub, req->data, req->len, seqno);
815         } else {
816                 ast_debug(1, "Queueing Request:\n%s to %s:%d\n", req->data,
817                         ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
818         }
819
820         /* XXX find tail. We could also keep tail in the data struct for faster access */
821         for (t = *queue; t && t->next; t = t->next);
822
823         r->next = NULL;
824         if (t)
825                 t->next = r;
826         else
827                 *queue = r;
828
829         ast_mutex_unlock(l);
830
831         return res;
832 }
833
834 static int mgcp_call(struct ast_channel *ast, char *dest, int timeout)
835 {
836         int res;
837         struct mgcp_endpoint *p;
838         struct mgcp_subchannel *sub;
839         char tone[50] = "";
840         const char *distinctive_ring = NULL;
841         struct varshead *headp;
842         struct ast_var_t *current;
843
844         ast_debug(3, "MGCP mgcp_call(%s)\n", ast->name);
845         sub = ast->tech_pvt;
846         p = sub->parent;
847         headp = &ast->varshead;
848         AST_LIST_TRAVERSE(headp,current,entries) {
849                 /* Check whether there is an ALERT_INFO variable */
850                 if (strcasecmp(ast_var_name(current),"ALERT_INFO") == 0) {
851                         distinctive_ring = ast_var_value(current);
852                 }
853         }
854
855         ast_mutex_lock(&sub->lock);
856         switch (p->hookstate) {
857         case MGCP_OFFHOOK:
858                 if (!ast_strlen_zero(distinctive_ring)) {
859                         snprintf(tone, sizeof(tone), "L/wt%s", distinctive_ring);
860                         ast_debug(3, "MGCP distinctive callwait %s\n", tone);
861                 } else {
862                         ast_copy_string(tone, (p->ncs ? "L/wt1" : "L/wt"), sizeof(tone));
863                         ast_debug(3, "MGCP normal callwait %s\n", tone);
864                 }
865                 break;
866         case MGCP_ONHOOK:
867         default:
868                 if (!ast_strlen_zero(distinctive_ring)) {
869                         snprintf(tone, sizeof(tone), "L/r%s", distinctive_ring);
870                         ast_debug(3, "MGCP distinctive ring %s\n", tone);
871                 } else {
872                         ast_copy_string(tone, "L/rg", sizeof(tone));
873                         ast_debug(3, "MGCP default ring\n");
874                 }
875                 break;
876         }
877
878         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
879                 ast_log(LOG_WARNING, "mgcp_call called on %s, neither down nor reserved\n", ast->name);
880                 ast_mutex_unlock(&sub->lock);
881                 return -1;
882         }
883
884         res = 0;
885         sub->outgoing = 1;
886         sub->cxmode = MGCP_CX_RECVONLY;
887         ast_setstate(ast, AST_STATE_RINGING);
888         if (p->type == TYPE_LINE) {
889                 if (!sub->rtp) {
890                         start_rtp(sub);
891                 } else {
892                         transmit_modify_request(sub);
893                 }
894
895                 if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) {
896                         /* try to prevent a callwait from disturbing the other connection */
897                         sub->next->cxmode = MGCP_CX_RECVONLY;
898                         transmit_modify_request(sub->next);
899                 }
900
901                 transmit_notify_request_with_callerid(sub, tone,
902                         S_COR(ast->connected.id.number.valid, ast->connected.id.number.str, ""),
903                         S_COR(ast->connected.id.name.valid, ast->connected.id.name.str, ""));
904                 ast_setstate(ast, AST_STATE_RINGING);
905
906                 if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) {
907                         /* Put the connection back in sendrecv */
908                         sub->next->cxmode = MGCP_CX_SENDRECV;
909                         transmit_modify_request(sub->next);
910                 }
911         } else {
912                 ast_log(LOG_NOTICE, "Don't know how to dial on trunks yet\n");
913                 res = -1;
914         }
915         ast_mutex_unlock(&sub->lock);
916         return res;
917 }
918
919 static int mgcp_hangup(struct ast_channel *ast)
920 {
921         struct mgcp_subchannel *sub = ast->tech_pvt;
922         struct mgcp_endpoint *p = sub->parent;
923         struct ast_channel *bridged;
924
925         ast_debug(1, "mgcp_hangup(%s)\n", ast->name);
926         if (!ast->tech_pvt) {
927                 ast_debug(1, "Asked to hangup channel not connected\n");
928                 return 0;
929         }
930         if (strcmp(sub->magic, MGCP_SUBCHANNEL_MAGIC)) {
931                 ast_debug(1, "Invalid magic. MGCP subchannel freed up already.\n");
932                 return 0;
933         }
934         ast_mutex_lock(&sub->lock);
935         ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s\n", ast->name, p->name, p->parent->name);
936
937         if ((p->dtmfmode & MGCP_DTMF_INBAND) && p->dsp) {
938                 /* check whether other channel is active. */
939                 if (!sub->next->owner) {
940                         if (p->dtmfmode & MGCP_DTMF_HYBRID) {
941                                 p->dtmfmode &= ~MGCP_DTMF_INBAND;
942                         }
943                         ast_debug(2, "MGCP free dsp on %s@%s\n", p->name, p->parent->name);
944                         ast_dsp_free(p->dsp);
945                         p->dsp = NULL;
946                 }
947         }
948
949         sub->owner = NULL;
950
951         /* for deleting gate */
952         if (p->pktcgatealloc && sub->gate) {
953                 sub->gate->gate_open = NULL;
954                 sub->gate->gate_remove = NULL;
955                 sub->gate->got_dq_gi = NULL;
956                 sub->gate->tech_pvt = NULL;
957                 if (sub->gate->state == GATE_ALLOC_PROGRESS || sub->gate->state == GATE_ALLOCATED) {
958                         ast_pktccops_gate_alloc(GATE_DEL, sub->gate, 0, 0, 0, 0, 0, 0, NULL, NULL);
959                 } else {
960                         sub->gate->deltimer = time(NULL) + 5;
961                 }
962                 sub->gate = NULL;
963         }
964
965         if (!ast_strlen_zero(sub->cxident)) {
966                 transmit_connection_del(sub);
967         }
968         sub->cxident[0] = '\0';
969         if ((sub == p->sub) && sub->next->owner) {
970                 if (p->hookstate == MGCP_OFFHOOK) {
971                         if (sub->next->owner && ast_bridged_channel(sub->next->owner)) {
972                                 /* ncs fix! */
973                                 bridged = ast_bridged_channel(sub->next->owner);
974                                 transmit_notify_request_with_callerid(p->sub, (p->ncs ? "L/wt1" : "L/wt"),
975                                         S_COR(bridged->caller.id.number.valid, bridged->caller.id.number.str, ""),
976                                         S_COR(bridged->caller.id.name.valid, bridged->caller.id.name.str, ""));
977                         }
978                 } else {
979                         /* set our other connection as the primary and swith over to it */
980                         p->sub = sub->next;
981                         p->sub->cxmode = MGCP_CX_RECVONLY;
982                         transmit_modify_request(p->sub);
983                         if (sub->next->owner && ast_bridged_channel(sub->next->owner)) {
984                                 bridged = ast_bridged_channel(sub->next->owner);
985                                 transmit_notify_request_with_callerid(p->sub, "L/rg",
986                                         S_COR(bridged->caller.id.number.valid, bridged->caller.id.number.str, ""),
987                                         S_COR(bridged->caller.id.name.valid, bridged->caller.id.name.str, ""));
988                         }
989                 }
990
991         } else if ((sub == p->sub->next) && p->hookstate == MGCP_OFFHOOK) {
992                 transmit_notify_request(sub, p->ncs ? "" : "L/v");
993         } else if (p->hookstate == MGCP_OFFHOOK) {
994                 transmit_notify_request(sub, "L/ro");
995         } else {
996                 transmit_notify_request(sub, "");
997         }
998
999         ast->tech_pvt = NULL;
1000         sub->alreadygone = 0;
1001         sub->outgoing = 0;
1002         sub->cxmode = MGCP_CX_INACTIVE;
1003         sub->callid[0] = '\0';
1004         if (p) {
1005                 memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
1006         }
1007         /* Reset temporary destination */
1008         memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
1009         if (sub->rtp) {
1010                 ast_rtp_instance_destroy(sub->rtp);
1011                 sub->rtp = NULL;
1012         }
1013
1014         ast_module_unref(ast_module_info->self);
1015
1016         if ((p->hookstate == MGCP_ONHOOK) && (!sub->next->rtp)) {
1017                 p->hidecallerid = 0;
1018                 if (p->hascallwaiting && !p->callwaiting) {
1019                         ast_verb(3, "Enabling call waiting on %s\n", ast->name);
1020                         p->callwaiting = -1;
1021                 }
1022                 if (has_voicemail(p)) {
1023                         ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s set vmwi(+)\n",
1024                                 ast->name, p->name, p->parent->name);
1025                         transmit_notify_request(sub, "L/vmwi(+)");
1026                 } else {
1027                         ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s set vmwi(-)\n",
1028                                 ast->name, p->name, p->parent->name);
1029                         transmit_notify_request(sub, "L/vmwi(-)");
1030                 }
1031         }
1032         ast_mutex_unlock(&sub->lock);
1033         return 0;
1034 }
1035
1036 static char *handle_mgcp_show_endpoints(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1037 {
1038         struct mgcp_gateway  *mg;
1039         struct mgcp_endpoint *me;
1040         int hasendpoints = 0;
1041         struct ast_variable * v = NULL;
1042
1043         switch (cmd) {
1044         case CLI_INIT:
1045                 e->command = "mgcp show endpoints";
1046                 e->usage =
1047                         "Usage: mgcp show endpoints\n"
1048                         "       Lists all endpoints known to the MGCP (Media Gateway Control Protocol) subsystem.\n";
1049                 return NULL;
1050         case CLI_GENERATE:
1051                 return NULL;
1052         }
1053
1054         if (a->argc != 3) {
1055                 return CLI_SHOWUSAGE;
1056         }
1057         ast_mutex_lock(&gatelock);
1058         for (mg = gateways; mg; mg = mg->next) {
1059                 ast_cli(a->fd, "Gateway '%s' at %s (%s%s)\n", mg->name, mg->addr.sin_addr.s_addr ? ast_inet_ntoa(mg->addr.sin_addr) : ast_inet_ntoa(mg->defaddr.sin_addr), mg->realtime ? "Realtime, " : "", mg->dynamic ? "Dynamic" : "Static");
1060                 for (me = mg->endpoints; me; me = me->next) {
1061                         ast_cli(a->fd, "   -- '%s@%s in '%s' is %s\n", me->name, mg->name, me->context, me->sub->owner ? "active" : "idle");
1062                         if (me->chanvars) {
1063                                 ast_cli(a->fd, "  Variables:\n");
1064                                 for (v = me->chanvars ; v ; v = v->next) {
1065                                         ast_cli(a->fd, "    %s = '%s'\n", v->name, v->value);
1066                                 }
1067                         }
1068                         hasendpoints = 1;
1069                 }
1070                 if (!hasendpoints) {
1071                         ast_cli(a->fd, "   << No Endpoints Defined >>     ");
1072                 }
1073         }
1074         ast_mutex_unlock(&gatelock);
1075         return CLI_SUCCESS;
1076 }
1077
1078 static char *handle_mgcp_audit_endpoint(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1079 {
1080         struct mgcp_gateway  *mg;
1081         struct mgcp_endpoint *me;
1082         int found = 0;
1083         char *ename,*gname, *c;
1084
1085         switch (cmd) {
1086         case CLI_INIT:
1087                 e->command = "mgcp audit endpoint";
1088                 e->usage =
1089                         "Usage: mgcp audit endpoint <endpointid>\n"
1090                         "       Lists the capabilities of an endpoint in the MGCP (Media Gateway Control Protocol) subsystem.\n"
1091                         "       mgcp debug MUST be on to see the results of this command.\n";
1092                 return NULL;
1093         case CLI_GENERATE:
1094                 return NULL;
1095         }
1096
1097         if (!mgcpdebug) {
1098                 return CLI_SHOWUSAGE;
1099         }
1100         if (a->argc != 4)
1101                 return CLI_SHOWUSAGE;
1102         /* split the name into parts by null */
1103         ename = ast_strdupa(a->argv[3]);
1104         for (gname = ename; *gname; gname++) {
1105                 if (*gname == '@') {
1106                         *gname = 0;
1107                         gname++;
1108                         break;
1109                 }
1110         }
1111         if (gname[0] == '[') {
1112                 gname++;
1113         }
1114         if ((c = strrchr(gname, ']'))) {
1115                 *c = '\0';
1116         }
1117         ast_mutex_lock(&gatelock);
1118         for (mg = gateways; mg; mg = mg->next) {
1119                 if (!strcasecmp(mg->name, gname)) {
1120                         for (me = mg->endpoints; me; me = me->next) {
1121                                 if (!strcasecmp(me->name, ename)) {
1122                                         found = 1;
1123                                         transmit_audit_endpoint(me);
1124                                         break;
1125                                 }
1126                         }
1127                         if (found) {
1128                                 break;
1129                         }
1130                 }
1131         }
1132         if (!found) {
1133                 ast_cli(a->fd, "   << Could not find endpoint >>     ");
1134         }
1135         ast_mutex_unlock(&gatelock);
1136         return CLI_SUCCESS;
1137 }
1138
1139 static char *handle_mgcp_set_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1140 {
1141         switch (cmd) {
1142         case CLI_INIT:
1143                 e->command = "mgcp set debug {on|off}";
1144                 e->usage =
1145                         "Usage: mgcp set debug {on|off}\n"
1146                         "       Enables/Disables dumping of MGCP packets for debugging purposes\n";     
1147                 return NULL;
1148         case CLI_GENERATE:
1149                 return NULL;
1150         }
1151
1152         if (a->argc != e->args)
1153                 return CLI_SHOWUSAGE;
1154
1155         if (!strncasecmp(a->argv[e->args - 1], "on", 2)) {
1156                 mgcpdebug = 1;
1157                 ast_cli(a->fd, "MGCP Debugging Enabled\n");
1158         } else if (!strncasecmp(a->argv[3], "off", 3)) {
1159                 mgcpdebug = 0;
1160                 ast_cli(a->fd, "MGCP Debugging Disabled\n");
1161         } else {
1162                 return CLI_SHOWUSAGE;
1163         }
1164         return CLI_SUCCESS;
1165 }
1166
1167 static struct ast_cli_entry cli_mgcp[] = {
1168         AST_CLI_DEFINE(handle_mgcp_audit_endpoint, "Audit specified MGCP endpoint"),
1169         AST_CLI_DEFINE(handle_mgcp_show_endpoints, "List defined MGCP endpoints"),
1170         AST_CLI_DEFINE(handle_mgcp_set_debug, "Enable/Disable MGCP debugging"),
1171         AST_CLI_DEFINE(mgcp_reload, "Reload MGCP configuration"),
1172 };
1173
1174 static int mgcp_answer(struct ast_channel *ast)
1175 {
1176         int res = 0;
1177         struct mgcp_subchannel *sub = ast->tech_pvt;
1178         struct mgcp_endpoint *p = sub->parent;
1179
1180         ast_mutex_lock(&sub->lock);
1181         sub->cxmode = MGCP_CX_SENDRECV;
1182         if (!sub->rtp) {
1183                 start_rtp(sub);
1184         } else {
1185                 transmit_modify_request(sub);
1186         }
1187         ast_verb(3, "MGCP mgcp_answer(%s) on %s@%s-%d\n",
1188                         ast->name, p->name, p->parent->name, sub->id);
1189         if (ast->_state != AST_STATE_UP) {
1190                 ast_setstate(ast, AST_STATE_UP);
1191                 ast_debug(1, "mgcp_answer(%s)\n", ast->name);
1192                 transmit_notify_request(sub, "");
1193                 transmit_modify_request(sub);
1194         }
1195         ast_mutex_unlock(&sub->lock);
1196         return res;
1197 }
1198
1199 static struct ast_frame *mgcp_rtp_read(struct mgcp_subchannel *sub)
1200 {
1201         /* Retrieve audio/etc from channel.  Assumes sub->lock is already held. */
1202         struct ast_frame *f;
1203
1204         f = ast_rtp_instance_read(sub->rtp, 0);
1205         /* Don't send RFC2833 if we're not supposed to */
1206         if (f && (f->frametype == AST_FRAME_DTMF) && !(sub->parent->dtmfmode & MGCP_DTMF_RFC2833))
1207                 return &ast_null_frame;
1208         if (sub->owner) {
1209                 /* We already hold the channel lock */
1210                 if (f->frametype == AST_FRAME_VOICE) {
1211                         if (f->subclass.codec != sub->owner->nativeformats) {
1212                                 ast_debug(1, "Oooh, format changed to %s\n", ast_getformatname(f->subclass.codec));
1213                                 sub->owner->nativeformats = f->subclass.codec;
1214                                 ast_set_read_format(sub->owner, sub->owner->readformat);
1215                                 ast_set_write_format(sub->owner, sub->owner->writeformat);
1216                         }
1217                         /* Courtesy fearnor aka alex@pilosoft.com */
1218                         if ((sub->parent->dtmfmode & MGCP_DTMF_INBAND) && (sub->parent->dsp)) {
1219 #if 0
1220                                 ast_log(LOG_NOTICE, "MGCP ast_dsp_process\n");
1221 #endif
1222                                 f = ast_dsp_process(sub->owner, sub->parent->dsp, f);
1223                         }
1224                 }
1225         }
1226         return f;
1227 }
1228
1229
1230 static struct ast_frame *mgcp_read(struct ast_channel *ast)
1231 {
1232         struct ast_frame *f;
1233         struct mgcp_subchannel *sub = ast->tech_pvt;
1234         ast_mutex_lock(&sub->lock);
1235         f = mgcp_rtp_read(sub);
1236         ast_mutex_unlock(&sub->lock);
1237         return f;
1238 }
1239
1240 static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame)
1241 {
1242         struct mgcp_subchannel *sub = ast->tech_pvt;
1243         int res = 0;
1244         char buf[256];
1245
1246         if (frame->frametype != AST_FRAME_VOICE) {
1247                 if (frame->frametype == AST_FRAME_IMAGE)
1248                         return 0;
1249                 else {
1250                         ast_log(LOG_WARNING, "Can't send %d type frames with MGCP write\n", frame->frametype);
1251                         return 0;
1252                 }
1253         } else {
1254                 if (!(frame->subclass.codec & ast->nativeformats)) {
1255                         ast_log(LOG_WARNING, "Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
1256                                 ast_getformatname(frame->subclass.codec),
1257                                 ast_getformatname_multiple(buf, sizeof(buf), ast->nativeformats),
1258                                 ast_getformatname(ast->readformat),
1259                                 ast_getformatname(ast->writeformat));
1260                         /* return -1; */
1261                 }
1262         }
1263         if (sub) {
1264                 ast_mutex_lock(&sub->lock);
1265                 if (!sub->sdpsent && sub->gate) {
1266                         if (sub->gate->state == GATE_ALLOCATED) {
1267                                 ast_debug(1, "GATE ALLOCATED, sending sdp\n");
1268                                 transmit_modify_with_sdp(sub, NULL, 0);
1269                         }
1270                 }
1271                 if ((sub->parent->sub == sub) || !sub->parent->singlepath) {
1272                         if (sub->rtp) {
1273                                 res =  ast_rtp_instance_write(sub->rtp, frame);
1274                         }
1275                 }
1276                 ast_mutex_unlock(&sub->lock);
1277         }
1278         return res;
1279 }
1280
1281 static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1282 {
1283         struct mgcp_subchannel *sub = newchan->tech_pvt;
1284
1285         ast_mutex_lock(&sub->lock);
1286         ast_log(LOG_NOTICE, "mgcp_fixup(%s, %s)\n", oldchan->name, newchan->name);
1287         if (sub->owner != oldchan) {
1288                 ast_mutex_unlock(&sub->lock);
1289                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, sub->owner);
1290                 return -1;
1291         }
1292         sub->owner = newchan;
1293         ast_mutex_unlock(&sub->lock);
1294         return 0;
1295 }
1296
1297 static int mgcp_senddigit_begin(struct ast_channel *ast, char digit)
1298 {
1299         struct mgcp_subchannel *sub = ast->tech_pvt;
1300         struct mgcp_endpoint *p = sub->parent;
1301         int res = 0;
1302
1303         ast_mutex_lock(&sub->lock);
1304         if (p->dtmfmode & MGCP_DTMF_INBAND || p->dtmfmode & MGCP_DTMF_HYBRID) {
1305                 ast_debug(1, "Sending DTMF using inband/hybrid\n");
1306                 res = -1; /* Let asterisk play inband indications */
1307         } else if (p->dtmfmode & MGCP_DTMF_RFC2833) {
1308                 ast_debug(1, "Sending DTMF using RFC2833");
1309                 ast_rtp_instance_dtmf_begin(sub->rtp, digit);
1310         } else {
1311                 ast_log(LOG_ERROR, "Don't know about DTMF_MODE %d\n", p->dtmfmode);
1312         }
1313         ast_mutex_unlock(&sub->lock);
1314
1315         return res;
1316 }
1317
1318 static int mgcp_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration)
1319 {
1320         struct mgcp_subchannel *sub = ast->tech_pvt;
1321         struct mgcp_endpoint *p = sub->parent;
1322         int res = 0;
1323         char tmp[4];
1324
1325         ast_mutex_lock(&sub->lock);
1326         if (p->dtmfmode & MGCP_DTMF_INBAND || p->dtmfmode & MGCP_DTMF_HYBRID) {
1327                 ast_debug(1, "Stopping DTMF using inband/hybrid\n");
1328                 res = -1; /* Tell Asterisk to stop inband indications */
1329         } else if (p->dtmfmode & MGCP_DTMF_RFC2833) {
1330                 ast_debug(1, "Stopping DTMF using RFC2833\n");
1331                 if (sub->parent->ncs) {
1332                         tmp[0] = digit;
1333                         tmp[1] = '\0';
1334                 } else {
1335                         tmp[0] = 'D';
1336                         tmp[1] = '/';
1337                         tmp[2] = digit;
1338                         tmp[3] = '\0';
1339                 }
1340                 transmit_notify_request(sub, tmp);
1341                 ast_rtp_instance_dtmf_end(sub->rtp, digit);
1342         } else {
1343                 ast_log(LOG_ERROR, "Don't know about DTMF_MODE %d\n", p->dtmfmode);
1344         }
1345         ast_mutex_unlock(&sub->lock);
1346
1347         return res;
1348 }
1349
1350 /*!
1351  *  \brief  mgcp_devicestate: channel callback for device status monitoring
1352  *  \param  data tech/resource name of MGCP device to query
1353  *
1354  * Callback for device state management in channel subsystem
1355  * to obtain device status (up/down) of a specific MGCP endpoint
1356  *
1357  *  \return device status result (from devicestate.h) AST_DEVICE_INVALID (not available) or AST_DEVICE_UNKNOWN (available but unknown state)
1358  */
1359 static int mgcp_devicestate(void *data)
1360 {
1361         struct mgcp_gateway  *g;
1362         struct mgcp_endpoint *e = NULL;
1363         char *tmp, *endpt, *gw;
1364         int ret = AST_DEVICE_INVALID;
1365
1366         endpt = ast_strdupa(data);
1367         if ((tmp = strchr(endpt, '@'))) {
1368                 *tmp++ = '\0';
1369                 gw = tmp;
1370         } else
1371                 goto error;
1372
1373         ast_mutex_lock(&gatelock);
1374         for (g = gateways; g; g = g->next) {
1375                 if (strcasecmp(g->name, gw) == 0) {
1376                         e = g->endpoints;
1377                         break;
1378                 }
1379         }
1380
1381         if (!e)
1382                 goto error;
1383
1384         for (; e; e = e->next) {
1385                 if (strcasecmp(e->name, endpt) == 0) {
1386                         break;
1387                 }
1388         }
1389
1390         if (!e)
1391                 goto error;
1392
1393         /*
1394          * As long as the gateway/endpoint is valid, we'll
1395          * assume that the device is available and its state
1396          * can be tracked.
1397          */
1398         ret = AST_DEVICE_UNKNOWN;
1399
1400 error:
1401         ast_mutex_unlock(&gatelock);
1402         return ret;
1403 }
1404
1405 static char *control2str(int ind) {
1406         switch (ind) {
1407         case AST_CONTROL_HANGUP:
1408                 return "Other end has hungup";
1409         case AST_CONTROL_RING:
1410                 return "Local ring";
1411         case AST_CONTROL_RINGING:
1412                 return "Remote end is ringing";
1413         case AST_CONTROL_ANSWER:
1414                 return "Remote end has answered";
1415         case AST_CONTROL_BUSY:
1416                 return "Remote end is busy";
1417         case AST_CONTROL_TAKEOFFHOOK:
1418                 return "Make it go off hook";
1419         case AST_CONTROL_OFFHOOK:
1420                 return "Line is off hook";
1421         case AST_CONTROL_CONGESTION:
1422                 return "Congestion (circuits busy)";
1423         case AST_CONTROL_FLASH:
1424                 return "Flash hook";
1425         case AST_CONTROL_WINK:
1426                 return "Wink";
1427         case AST_CONTROL_OPTION:
1428                 return "Set a low-level option";
1429         case AST_CONTROL_RADIO_KEY:
1430                 return "Key Radio";
1431         case AST_CONTROL_RADIO_UNKEY:
1432                 return "Un-Key Radio";
1433         }
1434         return "UNKNOWN";
1435 }
1436
1437 static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen)
1438 {
1439         struct mgcp_subchannel *sub = ast->tech_pvt;
1440         int res = 0;
1441
1442         ast_debug(3, "MGCP asked to indicate %d '%s' condition on channel %s\n",
1443                 ind, control2str(ind), ast->name);
1444         ast_mutex_lock(&sub->lock);
1445         switch(ind) {
1446         case AST_CONTROL_RINGING:
1447 #ifdef DLINK_BUGGY_FIRMWARE     
1448                 transmit_notify_request(sub, "rt");
1449 #else
1450                 if (!sub->sdpsent) { /* will hide the inband progress!!! */
1451                         transmit_notify_request(sub, sub->parent->ncs ? "L/rt" : "G/rt");
1452                 }
1453 #endif
1454                 break;
1455         case AST_CONTROL_BUSY:
1456                 transmit_notify_request(sub, "L/bz");
1457                 break;
1458         case AST_CONTROL_CONGESTION:
1459                 transmit_notify_request(sub, sub->parent->ncs ? "L/cg" : "G/cg");
1460                 break;
1461         case AST_CONTROL_HOLD:
1462                 ast_moh_start(ast, data, NULL);
1463                 break;
1464         case AST_CONTROL_UNHOLD:
1465                 ast_moh_stop(ast);
1466                 break;
1467         case AST_CONTROL_SRCUPDATE:
1468                 ast_rtp_instance_update_source(sub->rtp);
1469                 break;
1470         case AST_CONTROL_SRCCHANGE:
1471                 ast_rtp_instance_change_source(sub->rtp);
1472                 break;
1473         case AST_CONTROL_PROGRESS:
1474         case AST_CONTROL_PROCEEDING:
1475                 transmit_modify_request(sub);
1476         case -1:
1477                 transmit_notify_request(sub, "");
1478                 break;
1479         default:
1480                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind);
1481                 res = -1;
1482         }
1483         ast_mutex_unlock(&sub->lock);
1484         return res;
1485 }
1486
1487 static struct ast_channel *mgcp_new(struct mgcp_subchannel *sub, int state, const char *linkedid)
1488 {
1489         struct ast_channel *tmp;
1490         struct ast_variable *v = NULL;
1491         struct mgcp_endpoint *i = sub->parent;
1492         int fmt;
1493
1494         tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, linkedid, i->accountcode, i->exten, i->context, i->amaflags, "MGCP/%s@%s-%d", i->name, i->parent->name, sub->id);
1495         if (tmp) {
1496                 tmp->tech = &mgcp_tech;
1497                 tmp->nativeformats = i->capability;
1498                 if (!tmp->nativeformats) {
1499                         tmp->nativeformats = capability;
1500                 }
1501                 fmt = ast_best_codec(tmp->nativeformats);
1502                 if (sub->rtp) {
1503                         ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(sub->rtp, 0));
1504                 }
1505                 if (i->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID)) {
1506                         i->dsp = ast_dsp_new();
1507                         ast_dsp_set_features(i->dsp, DSP_FEATURE_DIGIT_DETECT);
1508                         /* this is to prevent clipping of dtmf tones during dsp processing */
1509                         ast_dsp_set_digitmode(i->dsp, DSP_DIGITMODE_NOQUELCH);
1510                 } else {
1511                         i->dsp = NULL;
1512                 }
1513                 if (state == AST_STATE_RING)
1514                         tmp->rings = 1;
1515                 tmp->writeformat = fmt;
1516                 tmp->rawwriteformat = fmt;
1517                 tmp->readformat = fmt;
1518                 tmp->rawreadformat = fmt;
1519                 tmp->tech_pvt = sub;
1520                 if (!ast_strlen_zero(i->language))
1521                         ast_string_field_set(tmp, language, i->language);
1522                 if (!ast_strlen_zero(i->accountcode))
1523                         ast_string_field_set(tmp, accountcode, i->accountcode);
1524                 if (i->amaflags)
1525                         tmp->amaflags = i->amaflags;
1526                 sub->owner = tmp;
1527                 ast_module_ref(ast_module_info->self);
1528                 tmp->callgroup = i->callgroup;
1529                 tmp->pickupgroup = i->pickupgroup;
1530                 ast_string_field_set(tmp, call_forward, i->call_forward);
1531                 ast_copy_string(tmp->context, i->context, sizeof(tmp->context));
1532                 ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
1533
1534                 /* Don't use ast_set_callerid() here because it will
1535                  * generate a needless NewCallerID event */
1536                 if (!ast_strlen_zero(i->cid_num)) {
1537                         tmp->caller.ani.number.valid = 1;
1538                         tmp->caller.ani.number.str = ast_strdup(i->cid_num);
1539                 }
1540
1541                 if (!i->adsi) {
1542                         tmp->adsicpe = AST_ADSI_UNAVAILABLE;
1543                 }
1544                 tmp->priority = 1;
1545
1546                 /* Set channel variables for this call from configuration */
1547                 for (v = i->chanvars ; v ; v = v->next) {
1548                         char valuebuf[1024];
1549                         pbx_builtin_setvar_helper(tmp, v->name, ast_get_encoded_str(v->value, valuebuf, sizeof(valuebuf)));
1550                 }
1551
1552                 if (sub->rtp) {
1553                         ast_jb_configure(tmp, &global_jbconf);
1554                 }
1555                 if (state != AST_STATE_DOWN) {
1556                         if (ast_pbx_start(tmp)) {
1557                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1558                                 ast_hangup(tmp);
1559                                 tmp = NULL;
1560                         }
1561                 }
1562                 ast_verb(3, "MGCP mgcp_new(%s) created in state: %s\n",
1563                                 tmp->name, ast_state2str(state));
1564         } else {
1565                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1566         }
1567         return tmp;
1568 }
1569
1570 static char *get_sdp_by_line(char* line, char *name, int nameLen)
1571 {
1572         if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
1573                 char *r = line + nameLen + 1;
1574                 while (*r && (*r < 33)) ++r;
1575                 return r;
1576         }
1577         return "";
1578 }
1579
1580 static char *get_sdp(struct mgcp_request *req, char *name)
1581 {
1582         int x;
1583         int len = strlen(name);
1584         char *r;
1585
1586         for (x = 0; x < req->lines; x++) {
1587                 r = get_sdp_by_line(req->line[x], name, len);
1588                 if (r[0] != '\0') return r;
1589         }
1590         return "";
1591 }
1592
1593 static void sdpLineNum_iterator_init(int *iterator)
1594 {
1595         *iterator = 0;
1596 }
1597
1598 static char *get_sdp_iterate(int* iterator, struct mgcp_request *req, char *name)
1599 {
1600         int len = strlen(name);
1601         char *r;
1602         while (*iterator < req->lines) {
1603                 r = get_sdp_by_line(req->line[(*iterator)++], name, len);
1604                 if (r[0] != '\0') return r;
1605         }
1606         return "";
1607 }
1608
1609 static char *__get_header(struct mgcp_request *req, char *name, int *start, char *def)
1610 {
1611         int x;
1612         int len = strlen(name);
1613         char *r;
1614         for (x = *start; x < req->headers; x++) {
1615                 if (!strncasecmp(req->header[x], name, len) &&
1616                     (req->header[x][len] == ':')) {
1617                         r = req->header[x] + len + 1;
1618                         while (*r && (*r < 33)) {
1619                                 r++;
1620                         }
1621                         *start = x + 1;
1622                         return r;
1623                 }
1624         }
1625         /* Don't return NULL, so get_header is always a valid pointer */
1626         return def;
1627 }
1628
1629 static char *get_header(struct mgcp_request *req, char *name)
1630 {
1631         int start = 0;
1632         return __get_header(req, name, &start, "");
1633 }
1634
1635 /*! \brief get_csv: (SC:) get comma separated value */
1636 static char *get_csv(char *c, int *len, char **next)
1637 {
1638         char *s;
1639
1640         *next = NULL, *len = 0;
1641         if (!c) return NULL;
1642
1643         while (*c && (*c < 33 || *c == ',')) {
1644                 c++;
1645         }
1646
1647         s = c;
1648         while (*c && (*c >= 33 && *c != ',')) {
1649                 c++, (*len)++;
1650         }
1651         *next = c;
1652
1653         if (*len == 0) {
1654                 s = NULL, *next = NULL;
1655         }
1656
1657         return s;
1658 }
1659
1660 static struct mgcp_gateway *find_realtime_gw(char *name, char *at, struct sockaddr_in *sin)
1661 {
1662         struct mgcp_gateway *g = NULL;
1663         struct ast_variable *mgcpgwconfig = NULL;
1664         struct ast_variable *gwv, *epname = NULL;
1665         struct mgcp_endpoint *e;
1666         char lines[256];
1667         int i, j;
1668
1669         ast_debug(1, "*** find Realtime MGCPGW\n");
1670
1671         if (!(i = ast_check_realtime("mgcpgw")) || !(j = ast_check_realtime("mgcpep"))) {
1672                 return NULL;
1673         }
1674
1675         if (ast_strlen_zero(at)) {
1676                 ast_debug(1, "null gw name\n");
1677                 return NULL;
1678         }
1679
1680         if (!(mgcpgwconfig = ast_load_realtime("mgcpgw", "name", at, NULL))) {
1681                 return NULL;
1682         }
1683
1684         /*!
1685          * \note This is a fairly odd way of instantiating lines.  Instead of each
1686          * line created by virtue of being in the database (and loaded via
1687          * ast_load_realtime_multientry), this code forces a specific order with a
1688          * "lines" entry in the "mgcpgw" record.  This has benefits, because as with
1689          * chan_dahdi, values are inherited across definitions.  The downside is
1690          * that it's not as clear what the values will be simply by looking at a
1691          * single row in the database, and it's probable that the sanest configuration
1692          * should have the first column in the "mgcpep" table be "clearvars", with a
1693          * static value of "all", if any variables are set at all.  It may be worth
1694          * making this assumption explicit in the code in the future, and then just
1695          * using ast_load_realtime_multientry for the "mgcpep" records.
1696          */
1697         lines[0] = '\0';
1698         for (gwv = mgcpgwconfig; gwv; gwv = gwv->next) {
1699                 if (!strcasecmp(gwv->name, "lines")) {
1700                         ast_copy_string(lines, gwv->value, sizeof(lines));
1701                         break;
1702                 }
1703         }
1704         /* Position gwv at the end of the list */
1705         for (gwv = gwv && gwv->next ? gwv : mgcpgwconfig; gwv->next; gwv = gwv->next);
1706
1707         if (!ast_strlen_zero(lines)) {
1708                 AST_DECLARE_APP_ARGS(args,
1709                         AST_APP_ARG(line)[100];
1710                 );
1711                 AST_STANDARD_APP_ARGS(args, lines);
1712                 for (i = 0; i < args.argc; i++) {
1713                         gwv->next = ast_load_realtime("mgcpep", "name", at, "line", args.line[i], NULL);
1714
1715                         /* Remove "line" AND position gwv at the end of the list. */
1716                         for (epname = NULL; gwv->next; gwv = gwv->next) {
1717                                 if (!strcasecmp(gwv->next->name, "line")) {
1718                                         /* Remove it from the list */
1719                                         epname = gwv->next;
1720                                         gwv->next = gwv->next->next;
1721                                 }
1722                         }
1723                         /* Since "line" instantiates the configuration, we have to move it to the end. */
1724                         if (epname) {
1725                                 gwv->next = epname;
1726                                 epname->next = NULL;
1727                                 gwv = gwv->next;
1728                         }
1729                 }
1730         }
1731         for (gwv = mgcpgwconfig; gwv; gwv = gwv->next) {
1732                 ast_debug(1, "MGCP Realtime var: %s => %s\n", gwv->name, gwv->value);
1733         }
1734
1735         if (mgcpgwconfig) {
1736                 g = build_gateway(at, mgcpgwconfig);
1737                 ast_variables_destroy(mgcpgwconfig);
1738         }
1739         if (g) {
1740                 g->next = gateways;
1741                 g->realtime = 1;
1742                 gateways = g;
1743                 for (e = g->endpoints; e; e = e->next) {
1744                         transmit_audit_endpoint(e);
1745                         e->needaudit = 0;
1746                 }
1747         }
1748         return g;
1749 }
1750
1751 static struct mgcp_subchannel *find_subchannel_and_lock(char *name, int msgid, struct sockaddr_in *sin)
1752 {
1753         struct mgcp_endpoint *p = NULL;
1754         struct mgcp_subchannel *sub = NULL;
1755         struct mgcp_gateway *g;
1756         char tmp[256] = "";
1757         char *at = NULL, *c;
1758         int found = 0;
1759         if (name) {
1760                 ast_copy_string(tmp, name, sizeof(tmp));
1761                 at = strchr(tmp, '@');
1762                 if (!at) {
1763                         ast_log(LOG_NOTICE, "Endpoint '%s' has no at sign!\n", name);
1764                         return NULL;
1765                 }
1766                 *at++ = '\0';
1767         }
1768         ast_mutex_lock(&gatelock);
1769         if (at && (at[0] == '[')) {
1770                 at++;
1771                 c = strrchr(at, ']');
1772                 if (c) {
1773                         *c = '\0';
1774                 }
1775         }
1776         for (g = gateways ? gateways : find_realtime_gw(name, at, sin); g; g = g->next ? g->next : find_realtime_gw(name, at, sin)) {
1777                 if ((!name || !strcasecmp(g->name, at)) &&
1778                     (sin || g->addr.sin_addr.s_addr || g->defaddr.sin_addr.s_addr)) {
1779                         /* Found the gateway.  If it's dynamic, save it's address -- now for the endpoint */
1780                         if (sin && g->dynamic && name) {
1781                                 if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) ||
1782                                         (g->addr.sin_port != sin->sin_port)) {
1783                                         memcpy(&g->addr, sin, sizeof(g->addr));
1784                                         {
1785                                                 struct ast_sockaddr tmp1, tmp2;
1786                                                 struct sockaddr_in tmp3 = {0,};
1787
1788                                                 tmp3.sin_addr = g->ourip;
1789                                                 ast_sockaddr_from_sin(&tmp1, &g->addr);
1790                                                 ast_sockaddr_from_sin(&tmp2, &tmp3);
1791                                                 if (ast_ouraddrfor(&tmp1, &tmp2)) {
1792                                                         memcpy(&g->ourip, &__ourip, sizeof(g->ourip));
1793                                                 }
1794                                                 ast_sockaddr_to_sin(&tmp2, &tmp3);
1795                                                 g->ourip = tmp3.sin_addr;
1796                                         }
1797                                         ast_verb(3, "Registered MGCP gateway '%s' at %s port %d\n", g->name, ast_inet_ntoa(g->addr.sin_addr), ntohs(g->addr.sin_port));
1798                                 }
1799                         /* not dynamic, check if the name matches */
1800                         } else if (name) {
1801                                 if (strcasecmp(g->name, at)) {
1802                                         g = g->next;
1803                                         continue;
1804                                 }
1805                         /* not dynamic, no name, check if the addr matches */
1806                         } else if (!name && sin) {
1807                                 if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) ||
1808                                     (g->addr.sin_port != sin->sin_port)) {
1809                                         if(!g->next)
1810                                                 g = find_realtime_gw(name, at, sin);
1811                                         else
1812                                                 g = g->next;
1813                                         continue;
1814                                 }
1815                         } else {
1816                                 continue;
1817                         }
1818                         for (p = g->endpoints; p; p = p->next) {
1819                                 ast_debug(1, "Searching on %s@%s for subchannel\n", p->name, g->name);
1820                                 if (msgid) {
1821                                         sub = p->sub;
1822                                         found = 1;
1823                                         break;
1824                                 } else if (name && !strcasecmp(p->name, tmp)) {
1825                                         ast_debug(1, "Coundn't determine subchannel, assuming current master %s@%s-%d\n",
1826                                                 p->name, g->name, p->sub->id);
1827                                         sub = p->sub;
1828                                         found = 1;
1829                                         break;
1830                                 }
1831                         }
1832                         if (sub && found) {
1833                                 ast_mutex_lock(&sub->lock);
1834                                 break;
1835                         }
1836                 }
1837         }
1838         ast_mutex_unlock(&gatelock);
1839         if (!sub) {
1840                 if (name) {
1841                         if (g) {
1842                                 ast_log(LOG_NOTICE, "Endpoint '%s' not found on gateway '%s'\n", tmp, at);
1843                         } else {
1844                                 ast_log(LOG_NOTICE, "Gateway '%s' (and thus its endpoint '%s') does not exist\n", at, tmp);
1845                         }
1846                 }
1847         }
1848         return sub;
1849 }
1850
1851 static void parse(struct mgcp_request *req)
1852 {
1853         /* Divide fields by NULL's */
1854         char *c;
1855         int f = 0;
1856         c = req->data;
1857
1858         /* First header starts immediately */
1859         req->header[f] = c;
1860         for (; *c; c++) {
1861                 if (*c == '\n') {
1862                         /* We've got a new header */
1863                         *c = 0;
1864                         ast_debug(3, "Header: %s (%d)\n", req->header[f], (int) strlen(req->header[f]));
1865                         if (ast_strlen_zero(req->header[f])) {
1866                                 /* Line by itself means we're now in content */
1867                                 c++;
1868                                 break;
1869                         }
1870                         if (f >= MGCP_MAX_HEADERS - 1) {
1871                                 ast_log(LOG_WARNING, "Too many MGCP headers...\n");
1872                         } else {
1873                                 f++;
1874                         }
1875                         req->header[f] = c + 1;
1876                 } else if (*c == '\r') {
1877                         /* Ignore but eliminate \r's */
1878                         *c = 0;
1879                 }
1880         }
1881         /* Check for last header */
1882         if (!ast_strlen_zero(req->header[f])) {
1883                 f++;
1884         }
1885         req->headers = f;
1886         /* Now we process any mime content */
1887         f = 0;
1888         req->line[f] = c;
1889         for (; *c; c++) {
1890                 if (*c == '\n') {
1891                         /* We've got a new line */
1892                         *c = 0;
1893                         ast_debug(3, "Line: %s (%d)\n", req->line[f], (int) strlen(req->line[f]));
1894                         if (f >= MGCP_MAX_LINES - 1) {
1895                                 ast_log(LOG_WARNING, "Too many SDP lines...\n");
1896                         } else {
1897                                 f++;
1898                         }
1899                         req->line[f] = c + 1;
1900                 } else if (*c == '\r') {
1901                         /* Ignore and eliminate \r's */
1902                         *c = 0;
1903                 }
1904         }
1905         /* Check for last line */
1906         if (!ast_strlen_zero(req->line[f])) {
1907                 f++;
1908         }
1909         req->lines = f;
1910         /* Parse up the initial header */
1911         c = req->header[0];
1912         while (*c && *c < 33) c++;
1913         /* First the verb */
1914         req->verb = c;
1915         while (*c && (*c > 32)) c++;
1916         if (*c) {
1917                 *c = '\0';
1918                 c++;
1919                 while (*c && (*c < 33)) c++;
1920                 req->identifier = c;
1921                 while (*c && (*c > 32)) c++;
1922                 if (*c) {
1923                         *c = '\0';
1924                         c++;
1925                         while (*c && (*c < 33)) c++;
1926                         req->endpoint = c;
1927                         while (*c && (*c > 32)) c++;
1928                         if (*c) {
1929                                 *c = '\0';
1930                                 c++;
1931                                 while (*c && (*c < 33)) c++;
1932                                 req->version = c;
1933                                 while (*c && (*c > 32)) c++;
1934                                 while (*c && (*c < 33)) c++;
1935                                 while (*c && (*c > 32)) c++;
1936                                 *c = '\0';
1937                         }
1938                 }
1939         }
1940
1941         ast_debug(1, "Verb: '%s', Identifier: '%s', Endpoint: '%s', Version: '%s'\n",
1942                         req->verb, req->identifier, req->endpoint, req->version);
1943         ast_debug(1, "%d headers, %d lines\n", req->headers, req->lines);
1944         if (*c) {
1945                 ast_log(LOG_WARNING, "Odd content, extra stuff left over ('%s')\n", c);
1946         }
1947 }
1948
1949 static int process_sdp(struct mgcp_subchannel *sub, struct mgcp_request *req)
1950 {
1951         char *m;
1952         char *c;
1953         char *a;
1954         char host[258];
1955         int len;
1956         int portno;
1957         format_t peercapability;
1958         int peerNonCodecCapability;
1959         struct sockaddr_in sin;
1960         struct ast_sockaddr sin_tmp;
1961         char *codecs;
1962         struct ast_hostent ahp; struct hostent *hp;
1963         int codec, codec_count=0;
1964         int iterator;
1965         struct mgcp_endpoint *p = sub->parent;
1966         char tmp1[256], tmp2[256], tmp3[256];
1967
1968         /* Get codec and RTP info from SDP */
1969         m = get_sdp(req, "m");
1970         c = get_sdp(req, "c");
1971         if (ast_strlen_zero(m) || ast_strlen_zero(c)) {
1972                 ast_log(LOG_WARNING, "Insufficient information for SDP (m = '%s', c = '%s')\n", m, c);
1973                 return -1;
1974         }
1975         if (sscanf(c, "IN IP4 %256s", host) != 1) {
1976                 ast_log(LOG_WARNING, "Invalid host in c= line, '%s'\n", c);
1977                 return -1;
1978         }
1979         /* XXX This could block for a long time, and block the main thread! XXX */
1980         hp = ast_gethostbyname(host, &ahp);
1981         if (!hp) {
1982                 ast_log(LOG_WARNING, "Unable to lookup host in c= line, '%s'\n", c);
1983                 return -1;
1984         }
1985         if (sscanf(m, "audio %30d RTP/AVP %n", &portno, &len) != 1) {
1986                 ast_log(LOG_WARNING, "Unable to determine port number for RTP in '%s'\n", m);
1987                 return -1;
1988         }
1989         sin.sin_family = AF_INET;
1990         memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
1991         sin.sin_port = htons(portno);
1992         ast_sockaddr_from_sin(&sin_tmp, &sin);
1993         ast_rtp_instance_set_remote_address(sub->rtp, &sin_tmp);
1994         ast_debug(3, "Peer RTP is at port %s:%d\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
1995         /* Scan through the RTP payload types specified in a "m=" line: */
1996         ast_rtp_codecs_payloads_clear(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp);
1997         codecs = ast_strdupa(m + len);
1998         while (!ast_strlen_zero(codecs)) {
1999                 if (sscanf(codecs, "%30d%n", &codec, &len) != 1) {
2000                         if (codec_count) {
2001                                 break;
2002                         }
2003                         ast_log(LOG_WARNING, "Error in codec string '%s' at '%s'\n", m, codecs);
2004                         return -1;
2005                 }
2006                 ast_rtp_codecs_payloads_set_m_type(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, codec);
2007                 codec_count++;
2008                 codecs += len;
2009         }
2010
2011         /* Next, scan through each "a=rtpmap:" line, noting each */
2012         /* specified RTP payload type (with corresponding MIME subtype): */
2013         sdpLineNum_iterator_init(&iterator);
2014         while ((a = get_sdp_iterate(&iterator, req, "a"))[0] != '\0') {
2015                 char* mimeSubtype = ast_strdupa(a); /* ensures we have enough space */
2016                 if (sscanf(a, "rtpmap: %30u %127[^/]/", &codec, mimeSubtype) != 2)
2017                         continue;
2018                 /* Note: should really look at the 'freq' and '#chans' params too */
2019                 ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, codec, "audio", mimeSubtype, 0);
2020         }
2021
2022         /* Now gather all of the codecs that were asked for: */
2023         ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(sub->rtp), &peercapability, &peerNonCodecCapability);
2024         p->capability = capability & peercapability;
2025         ast_debug(1, "Capabilities: us - %s, them - %s, combined - %s\n",
2026                 ast_getformatname_multiple(tmp1, sizeof(tmp1), capability),
2027                 ast_getformatname_multiple(tmp2, sizeof(tmp2), peercapability),
2028                 ast_getformatname_multiple(tmp3, sizeof(tmp3), p->capability));
2029         ast_debug(1, "Non-codec capabilities: us - %d, them - %d, combined - %d\n",
2030                 nonCodecCapability, peerNonCodecCapability, p->nonCodecCapability);
2031         if (!p->capability) {
2032                 ast_log(LOG_WARNING, "No compatible codecs!\n");
2033                 return -1;
2034         }
2035         return 0;
2036 }
2037
2038 static int add_header(struct mgcp_request *req, const char *var, const char *value)
2039 {
2040         if (req->len >= sizeof(req->data) - 4) {
2041                 ast_log(LOG_WARNING, "Out of space, can't add anymore\n");
2042                 return -1;
2043         }
2044         if (req->lines) {
2045                 ast_log(LOG_WARNING, "Can't add more headers when lines have been added\n");
2046                 return -1;
2047         }
2048         req->header[req->headers] = req->data + req->len;
2049         snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s: %s\r\n", var, value);
2050         req->len += strlen(req->header[req->headers]);
2051         if (req->headers < MGCP_MAX_HEADERS) {
2052                 req->headers++;
2053         } else {
2054                 ast_log(LOG_WARNING, "Out of header space\n");
2055                 return -1;
2056         }
2057         return 0;
2058 }
2059
2060 static int add_line(struct mgcp_request *req, char *line)
2061 {
2062         if (req->len >= sizeof(req->data) - 4) {
2063                 ast_log(LOG_WARNING, "Out of space, can't add anymore\n");
2064                 return -1;
2065         }
2066         if (!req->lines) {
2067                 /* Add extra empty return */
2068                 ast_copy_string(req->data + req->len, "\r\n", sizeof(req->data) - req->len);
2069                 req->len += strlen(req->data + req->len);
2070         }
2071         req->line[req->lines] = req->data + req->len;
2072         snprintf(req->line[req->lines], sizeof(req->data) - req->len, "%s", line);
2073         req->len += strlen(req->line[req->lines]);
2074         if (req->lines < MGCP_MAX_LINES) {
2075                 req->lines++;
2076         } else {
2077                 ast_log(LOG_WARNING, "Out of line space\n");
2078                 return -1;
2079         }
2080         return 0;
2081 }
2082
2083 static int init_resp(struct mgcp_request *req, char *resp, struct mgcp_request *orig, char *resprest)
2084 {
2085         /* Initialize a response */
2086         if (req->headers || req->len) {
2087                 ast_log(LOG_WARNING, "Request already initialized?!?\n");
2088                 return -1;
2089         }
2090         req->header[req->headers] = req->data + req->len;
2091         snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %s %s\r\n", resp, orig->identifier, resprest);
2092         req->len += strlen(req->header[req->headers]);
2093         if (req->headers < MGCP_MAX_HEADERS) {
2094                 req->headers++;
2095         } else {
2096                 ast_log(LOG_WARNING, "Out of header space\n");
2097         }
2098         return 0;
2099 }
2100
2101 static int init_req(struct mgcp_endpoint *p, struct mgcp_request *req, char *verb)
2102 {
2103         /* Initialize a response */
2104         if (req->headers || req->len) {
2105                 ast_log(LOG_WARNING, "Request already initialized?!?\n");
2106                 return -1;
2107         }
2108         req->header[req->headers] = req->data + req->len;
2109         /* check if we need brackets around the gw name */
2110         if (p->parent->isnamedottedip) {
2111                 snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %d %s@[%s] MGCP 1.0%s\r\n", verb, oseq, p->name, p->parent->name, p->ncs ? " NCS 1.0" : "");
2112         } else {
2113 +               snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %d %s@%s MGCP 1.0%s\r\n", verb, oseq, p->name, p->parent->name, p->ncs ? " NCS 1.0" : "");
2114         }
2115         req->len += strlen(req->header[req->headers]);
2116         if (req->headers < MGCP_MAX_HEADERS) {
2117                 req->headers++;
2118         } else {
2119                 ast_log(LOG_WARNING, "Out of header space\n");
2120         }
2121         return 0;
2122 }
2123
2124
2125 static int respprep(struct mgcp_request *resp, struct mgcp_endpoint *p, char *msg, struct mgcp_request *req, char *msgrest)
2126 {
2127         memset(resp, 0, sizeof(*resp));
2128         init_resp(resp, msg, req, msgrest);
2129         return 0;
2130 }
2131
2132 static int reqprep(struct mgcp_request *req, struct mgcp_endpoint *p, char *verb)
2133 {
2134         memset(req, 0, sizeof(struct mgcp_request));
2135         oseq++;
2136         if (oseq > 999999999) {
2137                 oseq = 1;
2138         }
2139         init_req(p, req, verb);
2140         return 0;
2141 }
2142
2143 static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest)
2144 {
2145         struct mgcp_request resp;
2146         struct mgcp_endpoint *p = sub->parent;
2147         struct mgcp_response *mgr;
2148
2149         if (!sub) {
2150                 return -1;
2151         }
2152
2153         respprep(&resp, p, msg, req, msgrest);
2154         if (!(mgr = ast_calloc(1, sizeof(*mgr) + resp.len + 1))) {
2155                 return send_response(sub, &resp);
2156         }
2157         /* Store MGCP response in case we have to retransmit */
2158         sscanf(req->identifier, "%30d", &mgr->seqno);
2159         time(&mgr->whensent);
2160         mgr->len = resp.len;
2161         memcpy(mgr->buf, resp.data, resp.len);
2162         mgr->buf[resp.len] = '\0';
2163         mgr->next = p->parent->responses;
2164         p->parent->responses = mgr;
2165
2166         return send_response(sub, &resp);
2167 }
2168
2169
2170 static int add_sdp(struct mgcp_request *resp, struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
2171 {
2172         int len;
2173         int codec;
2174         char costr[80];
2175         struct sockaddr_in sin;
2176         struct ast_sockaddr sin_tmp;
2177         char v[256];
2178         char s[256];
2179         char o[256];
2180         char c[256];
2181         char t[256];
2182         char m[256] = "";
2183         char a[1024] = "";
2184         format_t x;
2185         struct sockaddr_in dest = { 0, };
2186         struct ast_sockaddr dest_tmp;
2187         struct mgcp_endpoint *p = sub->parent;
2188         /* XXX We break with the "recommendation" and send our IP, in order that our
2189                peer doesn't have to ast_gethostbyname() us XXX */
2190         len = 0;
2191         if (!sub->rtp) {
2192                 ast_log(LOG_WARNING, "No way to add SDP without an RTP structure\n");
2193                 return -1;
2194         }
2195         ast_rtp_instance_get_local_address(sub->rtp, &sin_tmp);
2196         ast_sockaddr_to_sin(&sin_tmp, &sin);
2197         if (rtp) {
2198                 ast_rtp_instance_get_remote_address(sub->rtp, &dest_tmp);
2199                 ast_sockaddr_to_sin(&dest_tmp, &dest);
2200         } else {
2201                 if (sub->tmpdest.sin_addr.s_addr) {
2202                         dest.sin_addr = sub->tmpdest.sin_addr;
2203                         dest.sin_port = sub->tmpdest.sin_port;
2204                         /* Reset temporary destination */
2205                         memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
2206                 } else {
2207                         dest.sin_addr = p->parent->ourip;
2208                         dest.sin_port = sin.sin_port;
2209                 }
2210         }
2211         ast_debug(1, "We're at %s port %d\n", ast_inet_ntoa(p->parent->ourip), ntohs(sin.sin_port));
2212         ast_copy_string(v, "v=0\r\n", sizeof(v));
2213         snprintf(o, sizeof(o), "o=root %d %d IN IP4 %s\r\n", (int)getpid(), (int)getpid(), ast_inet_ntoa(dest.sin_addr));
2214         ast_copy_string(s, "s=session\r\n", sizeof(s));
2215         snprintf(c, sizeof(c), "c=IN IP4 %s\r\n", ast_inet_ntoa(dest.sin_addr));
2216         ast_copy_string(t, "t=0 0\r\n", sizeof(t));
2217         snprintf(m, sizeof(m), "m=audio %d RTP/AVP", ntohs(dest.sin_port));
2218         for (x = 1LL; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2219                 if (!(x & AST_FORMAT_AUDIO_MASK)) {
2220                         /* Audio is now discontiguous */
2221                         continue;
2222                 }
2223                 if (p->capability & x) {
2224                         ast_debug(1, "Answering with capability %s\n", ast_getformatname(x));
2225                         codec = ast_rtp_codecs_payload_code(ast_rtp_instance_get_codecs(sub->rtp), 1, x);
2226                         if (codec > -1) {
2227                                 snprintf(costr, sizeof(costr), " %d", codec);
2228                                 strncat(m, costr, sizeof(m) - strlen(m) - 1);
2229                                 snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype2(1, x, 0));
2230                                 strncat(a, costr, sizeof(a) - strlen(a) - 1);
2231                         }
2232                 }
2233         }
2234         for (x = 1LL; x <= AST_RTP_MAX; x <<= 1) {
2235                 if (p->nonCodecCapability & x) {
2236                         ast_debug(1, "Answering with non-codec capability %d\n", (int) x);
2237                         codec = ast_rtp_codecs_payload_code(ast_rtp_instance_get_codecs(sub->rtp), 0, x);
2238                         if (codec > -1) {
2239                                 snprintf(costr, sizeof(costr), " %d", codec);
2240                                 strncat(m, costr, sizeof(m) - strlen(m) - 1);
2241                                 snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype2(0, x, 0));
2242                                 strncat(a, costr, sizeof(a) - strlen(a) - 1);
2243                                 if (x == AST_RTP_DTMF) {
2244                                         /* Indicate we support DTMF...  Not sure about 16,
2245                                            but MSN supports it so dang it, we will too... */
2246                                         snprintf(costr, sizeof costr, "a=fmtp:%d 0-16\r\n", codec);
2247                                         strncat(a, costr, sizeof(a) - strlen(a) - 1);
2248                                 }
2249                         }
2250                 }
2251         }
2252         strncat(m, "\r\n", sizeof(m) - strlen(m) - 1);
2253         len = strlen(v) + strlen(s) + strlen(o) + strlen(c) + strlen(t) + strlen(m) + strlen(a);
2254         snprintf(costr, sizeof(costr), "%d", len);
2255         add_line(resp, v);
2256         add_line(resp, o);
2257         add_line(resp, s);
2258         add_line(resp, c);
2259         add_line(resp, t);
2260         add_line(resp, m);
2261         add_line(resp, a);
2262         return 0;
2263 }
2264
2265 static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp, format_t codecs)
2266 {
2267         struct mgcp_request resp;
2268         char local[256];
2269         char tmp[80];
2270         struct mgcp_endpoint *p = sub->parent;
2271         format_t x;
2272         struct ast_sockaddr sub_tmpdest_tmp;
2273
2274         if (ast_strlen_zero(sub->cxident) && rtp) {
2275                 /* We don't have a CXident yet, store the destination and
2276                    wait a bit */
2277                 ast_rtp_instance_get_remote_address(rtp, &sub_tmpdest_tmp);
2278                 ast_sockaddr_to_sin(&sub_tmpdest_tmp, &sub->tmpdest);
2279                 return 0;
2280         }
2281         ast_copy_string(local, "e:on, s:off, p:20", sizeof(local));
2282         for (x = 1; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2283                 if (!(x & AST_FORMAT_AUDIO_MASK)) {
2284                         /* No longer contiguous */
2285                         continue;
2286                 }
2287                 if (p->capability & x) {
2288                         snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2289                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2290                 }
2291         }
2292
2293         if (sub->gate) {
2294                 if (sub->gate->state == GATE_ALLOCATED || sub->gate->state == GATE_OPEN) {
2295                         snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
2296                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2297                         sub->sdpsent = 1;
2298                 } else {
2299                         /* oops wait */
2300                         ast_debug(1, "Waiting for opened gate...\n");
2301                         sub->sdpsent = 0;
2302                         return 0;
2303                 }
2304         }
2305
2306
2307         reqprep(&resp, p, "MDCX");
2308         add_header(&resp, "C", sub->callid);
2309         add_header(&resp, "L", local);
2310         add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
2311         /* X header should not be sent. kept for compatibility */
2312         add_header(&resp, "X", sub->txident);
2313         add_header(&resp, "I", sub->cxident);
2314         /*add_header(&resp, "S", "");*/
2315         add_sdp(&resp, sub, rtp);
2316         /* fill in new fields */
2317         resp.cmd = MGCP_CMD_MDCX;
2318         resp.trid = oseq;
2319         return send_request(p, sub, &resp, oseq);
2320 }
2321
2322 static int transmit_connect_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
2323 {
2324         struct mgcp_request resp;
2325         char local[256];
2326         char tmp[80];
2327         int x;
2328         struct mgcp_endpoint *p = sub->parent;
2329
2330         ast_debug(3, "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n",
2331                  p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2332
2333         ast_copy_string(local, "e:on, s:off, p:20", sizeof(local));
2334
2335         for (x = 1; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2336                 if (!(x & AST_FORMAT_AUDIO_MASK)) {
2337                         /* No longer contiguous */
2338                         continue;
2339                 }
2340                 if (p->capability & x) {
2341                         snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2342                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2343                 }
2344         }
2345
2346         if (sub->gate) {
2347                 if(sub->gate->state == GATE_ALLOCATED) {
2348                         snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
2349                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2350                 }
2351         }
2352         sub->sdpsent = 1;
2353         reqprep(&resp, p, "CRCX");
2354         add_header(&resp, "C", sub->callid);
2355         add_header(&resp, "L", local);
2356         add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
2357         /* X header should not be sent. kept for compatibility */
2358         add_header(&resp, "X", sub->txident);
2359         /*add_header(&resp, "S", "");*/
2360         add_sdp(&resp, sub, rtp);
2361         /* fill in new fields */
2362         resp.cmd = MGCP_CMD_CRCX;
2363         resp.trid = oseq;
2364         return send_request(p, sub, &resp, oseq);
2365 }
2366
2367 static int mgcp_pktcgate_remove(struct cops_gate *gate)
2368 {
2369         struct mgcp_subchannel *sub = gate->tech_pvt;
2370
2371         if (!sub) {
2372                 return 1;
2373         }
2374
2375         ast_mutex_lock(&sub->lock);
2376         ast_debug(1, "Pktc: gate 0x%x deleted\n", gate->gateid);
2377         if (sub->gate->state != GATE_CLOSED && sub->parent->hangupongateremove) {
2378                 sub->gate = NULL;
2379                 if (sub->owner) {
2380                         ast_softhangup(sub->owner, AST_CAUSE_REQUESTED_CHAN_UNAVAIL);
2381                         ast_channel_unlock(sub->owner);
2382                 }
2383         } else {
2384                 sub->gate = NULL;
2385         }
2386         ast_mutex_unlock(&sub->lock);
2387         return 1;
2388 }
2389
2390 static int mgcp_pktcgate_open(struct cops_gate *gate)
2391 {
2392         struct mgcp_subchannel *sub = gate->tech_pvt;
2393         if (!sub) {
2394                 return 1;
2395         }
2396         ast_mutex_lock(&sub->lock);
2397         ast_debug(1, "Pktc: gate 0x%x open\n", gate->gateid);
2398         if (!sub->sdpsent) transmit_modify_with_sdp(sub, NULL, 0);
2399         ast_mutex_unlock(&sub->lock);
2400         return 1;
2401 }
2402
2403 static int mgcp_alloc_pktcgate(struct mgcp_subchannel *sub)
2404 {
2405         struct mgcp_endpoint *p = sub->parent;
2406         sub->gate = ast_pktccops_gate_alloc(GATE_SET, NULL, ntohl(p->parent->addr.sin_addr.s_addr),
2407                                         8, 128000, 232, 0, 0, NULL, &mgcp_pktcgate_remove);
2408
2409         if (!sub->gate) {
2410                 return 0;
2411         }
2412         sub->gate->tech_pvt = sub;
2413         sub->gate->gate_open = &mgcp_pktcgate_open;
2414         return 1;
2415 }
2416
2417 static int transmit_connect(struct mgcp_subchannel *sub)
2418 {
2419         struct mgcp_request resp;
2420         char local[256];
2421         char tmp[80];
2422         format_t x;
2423         struct mgcp_endpoint *p = sub->parent;
2424
2425         ast_copy_string(local, "p:20, s:off, e:on", sizeof(local));
2426
2427         for (x = 1LL; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2428                 if (p->capability & x) {
2429                         snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2430                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2431                 }
2432         }
2433
2434         ast_debug(3, "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n",
2435                     p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2436         sub->sdpsent = 0;
2437         reqprep(&resp, p, "CRCX");
2438         add_header(&resp, "C", sub->callid);
2439         add_header(&resp, "L", local);
2440         add_header(&resp, "M", "inactive");
2441         /* X header should not be sent. kept for compatibility */
2442         add_header(&resp, "X", sub->txident);
2443         /*add_header(&resp, "S", "");*/
2444         /* fill in new fields */
2445         resp.cmd = MGCP_CMD_CRCX;
2446         resp.trid = oseq;
2447         return send_request(p, sub, &resp, oseq);
2448 }
2449
2450 static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone)
2451 {
2452         struct mgcp_request resp;
2453         struct mgcp_endpoint *p = sub->parent;
2454
2455         ast_debug(3, "MGCP Asked to indicate tone: %s on  %s@%s-%d in cxmode: %s\n",
2456                 tone, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]);
2457         ast_copy_string(p->curtone, tone, sizeof(p->curtone));
2458         reqprep(&resp, p, "RQNT");
2459         add_header(&resp, "X", p->rqnt_ident);
2460         switch (p->hookstate) {
2461         case MGCP_ONHOOK:
2462                 add_header(&resp, "R", "L/hd(N)");
2463                 break;
2464         case MGCP_OFFHOOK:
2465                 add_header_offhook(sub, &resp, tone);
2466                 break;
2467         }
2468         if (!ast_strlen_zero(tone)) {
2469                 add_header(&resp, "S", tone);
2470         }
2471         /* fill in new fields */
2472         resp.cmd = MGCP_CMD_RQNT;
2473         resp.trid = oseq;
2474         return send_request(p, NULL, &resp, oseq);
2475 }
2476
2477 static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername)
2478 {
2479         struct mgcp_request resp;
2480         char tone2[256];
2481         char *l, *n;
2482         struct timeval t = ast_tvnow();
2483         struct ast_tm tm;
2484         struct mgcp_endpoint *p = sub->parent;
2485
2486         ast_localtime(&t, &tm, NULL);
2487         n = callername;
2488         l = callernum;
2489         if (!n)
2490                 n = "";
2491         if (!l)
2492                 l = "";
2493
2494         /* Keep track of last callerid for blacklist and callreturn */
2495         ast_copy_string(p->lastcallerid, l, sizeof(p->lastcallerid));
2496
2497         snprintf(tone2, sizeof(tone2), "%s,L/ci(%02d/%02d/%02d/%02d,%s,%s)", tone,
2498                 tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, l, n);
2499         ast_copy_string(p->curtone, tone, sizeof(p->curtone));
2500         reqprep(&resp, p, "RQNT");
2501         add_header(&resp, "X", p->rqnt_ident);
2502         switch (p->hookstate) {
2503         case MGCP_ONHOOK:
2504                 add_header(&resp, "R", "L/hd(N)");
2505                 break;
2506         case MGCP_OFFHOOK:
2507                 add_header_offhook(sub, &resp, tone);
2508                 break;
2509         }
2510         if (!ast_strlen_zero(tone2)) {
2511                 add_header(&resp, "S", tone2);
2512         }
2513         ast_debug(3, "MGCP Asked to indicate tone: %s on  %s@%s-%d in cxmode: %s\n",
2514                 tone2, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]);
2515         /* fill in new fields */
2516         resp.cmd = MGCP_CMD_RQNT;
2517         resp.trid = oseq;
2518         return send_request(p, NULL, &resp, oseq);
2519 }
2520
2521 static int transmit_modify_request(struct mgcp_subchannel *sub)
2522 {
2523         struct mgcp_request resp;
2524         struct mgcp_endpoint *p = sub->parent;
2525         format_t x;
2526         int fc = 1;
2527         char local[256];
2528         char tmp[80];
2529
2530         if (ast_strlen_zero(sub->cxident)) {
2531                 /* We don't have a CXident yet, store the destination and
2532                    wait a bit */
2533                 return 0;
2534         }
2535         ast_debug(3, "Modified %s@%s-%d with new mode: %s on callid: %s\n",
2536                 p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2537
2538         ast_copy_string(local, "", sizeof(local));
2539         for (x = 1; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2540                 if (p->capability & x) {
2541                         if (p->ncs && !fc) {
2542                                 p->capability = x; /* sb5120e bug */
2543                                 break;
2544                         } else {
2545                                 fc = 0;
2546                                 snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2547                         }
2548                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2549                 }
2550         }
2551
2552         if (!sub->sdpsent) {
2553                 if (sub->gate) {
2554                         if (sub->gate->state == GATE_ALLOCATED || sub->gate->state == GATE_OPEN) {
2555                                 snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
2556                                 strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2557                         } else {
2558                                         /* we still don't have gateid wait */
2559                                 return 0;
2560                         }
2561                 }
2562         }
2563
2564         reqprep(&resp, p, "MDCX");
2565         add_header(&resp, "C", sub->callid);
2566         if (!sub->sdpsent) {
2567                 add_header(&resp, "L", local);
2568         }
2569         add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
2570         /* X header should not be sent. kept for compatibility */
2571         add_header(&resp, "X", sub->txident);
2572         add_header(&resp, "I", sub->cxident);
2573         switch (sub->parent->hookstate) {
2574         case MGCP_ONHOOK:
2575                 add_header(&resp, "R", "L/hd(N)");
2576                 break;
2577         case MGCP_OFFHOOK:
2578                 add_header_offhook(sub, &resp, "");
2579                 break;
2580         }
2581         if (!sub->sdpsent) {
2582                 add_sdp(&resp, sub, NULL);
2583                 sub->sdpsent = 1;
2584         }
2585         /* fill in new fields */
2586         resp.cmd = MGCP_CMD_MDCX;
2587         resp.trid = oseq;
2588         return send_request(p, sub, &resp, oseq);
2589 }
2590
2591
2592 static void add_header_offhook(struct mgcp_subchannel *sub, struct mgcp_request *resp, char *tone)
2593 {
2594         struct mgcp_endpoint *p = sub->parent;
2595         char tone_indicate_end = 0;
2596
2597         /* We also should check the tone to indicate, because it have no sense
2598            to request notify D/[0-9#*] (dtmf keys) if we are sending congestion
2599            tone for example G/cg */
2600         if (p && (!strcasecmp(tone, (p->ncs ? "L/ro" : "G/cg")))) {
2601                 tone_indicate_end = 1;
2602         }
2603
2604         if (p && p->sub && p->sub->owner &&
2605                         p->sub->owner->_state >= AST_STATE_RINGING &&
2606                         (p->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID))) {
2607             add_header(resp, "R", "L/hu(N),L/hf(N)");
2608
2609         } else if (!tone_indicate_end){
2610             add_header(resp, "R", (p->ncs ? "L/hu(N),L/hf(N),L/[0-9#*](N)" : "L/hu(N),L/hf(N),D/[0-9#*](N)"));
2611         } else {
2612                 ast_debug(1, "We don't want more digits if we will end the call\n");
2613                 add_header(resp, "R", "L/hu(N),L/hf(N)");
2614         }
2615 }
2616
2617
2618
2619
2620 static int transmit_audit_endpoint(struct mgcp_endpoint *p)
2621 {
2622         struct mgcp_request resp;
2623         reqprep(&resp, p, "AUEP");
2624         /* removed unknown param VS */
2625         /*add_header(&resp, "F", "A,R,D,S,X,N,I,T,O,ES,E,MD,M");*/
2626         add_header(&resp, "F", "A");
2627         /* fill in new fields */
2628         resp.cmd = MGCP_CMD_AUEP;
2629         resp.trid = oseq;
2630         return send_request(p, NULL, &resp, oseq);
2631 }
2632
2633 static int transmit_connection_del(struct mgcp_subchannel *sub)
2634 {
2635         struct mgcp_endpoint *p = sub->parent;
2636         struct mgcp_request resp;
2637
2638         ast_debug(3, "Delete connection %s %s@%s-%d with new mode: %s on callid: %s\n",
2639                 sub->cxident, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2640         reqprep(&resp, p, "DLCX");
2641         /* check if call id is avail */
2642         if (sub->callid[0])
2643                 add_header(&resp, "C", sub->callid);
2644         /* X header should not be sent. kept for compatibility */
2645         add_header(&resp, "X", sub->txident);
2646         /* check if cxident is avail */
2647         if (sub->cxident[0])
2648                 add_header(&resp, "I", sub->cxident);
2649         /* fill in new fields */
2650         resp.cmd = MGCP_CMD_DLCX;
2651         resp.trid = oseq;
2652         return send_request(p, sub, &resp, oseq);
2653 }
2654
2655 static int transmit_connection_del_w_params(struct mgcp_endpoint *p, char *callid, char *cxident)
2656 {
2657         struct mgcp_request resp;
2658
2659         ast_debug(3, "Delete connection %s %s@%s on callid: %s\n",
2660                 cxident ? cxident : "", p->name, p->parent->name, callid ? callid : "");
2661         reqprep(&resp, p, "DLCX");
2662         /* check if call id is avail */
2663         if (callid && *callid)
2664                 add_header(&resp, "C", callid);
2665         /* check if cxident is avail */
2666         if (cxident && *cxident)
2667                 add_header(&resp, "I", cxident);
2668         /* fill in new fields */
2669         resp.cmd = MGCP_CMD_DLCX;
2670         resp.trid = oseq;
2671         return send_request(p, p->sub, &resp, oseq);
2672 }
2673
2674 /*! \brief  dump_cmd_queues: (SC:) cleanup pending commands */
2675 static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *sub)
2676 {
2677         struct mgcp_request *t, *q;
2678
2679         if (p) {
2680                 ast_mutex_lock(&p->rqnt_queue_lock);
2681                 for (q = p->rqnt_queue; q; t = q->next, ast_free(q), q=t);
2682                 p->rqnt_queue = NULL;
2683                 ast_mutex_unlock(&p->rqnt_queue_lock);
2684
2685                 ast_mutex_lock(&p->cmd_queue_lock);
2686                 for (q = p->cmd_queue; q; t = q->next, ast_free(q), q=t);
2687                 p->cmd_queue = NULL;
2688                 ast_mutex_unlock(&p->cmd_queue_lock);
2689
2690                 ast_mutex_lock(&p->sub->cx_queue_lock);
2691                 for (q = p->sub->cx_queue; q; t = q->next, ast_free(q), q=t);
2692                 p->sub->cx_queue = NULL;
2693                 ast_mutex_unlock(&p->sub->cx_queue_lock);
2694
2695                 ast_mutex_lock(&p->sub->next->cx_queue_lock);
2696                 for (q = p->sub->next->cx_queue; q; t = q->next, ast_free(q), q=t);
2697                 p->sub->next->cx_queue = NULL;
2698                 ast_mutex_unlock(&p->sub->next->cx_queue_lock);
2699         } else if (sub) {
2700                 ast_mutex_lock(&sub->cx_queue_lock);
2701                 for (q = sub->cx_queue; q; t = q->next, ast_free(q), q=t);
2702                 sub->cx_queue = NULL;
2703                 ast_mutex_unlock(&sub->cx_queue_lock);
2704         }
2705 }
2706
2707
2708 /*! \brief  find_command: (SC:) remove command transaction from queue */
2709 static struct mgcp_request *find_command(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
2710                 struct mgcp_request **queue, ast_mutex_t *l, int ident)
2711 {
2712         struct mgcp_request *prev, *req;
2713
2714         ast_mutex_lock(l);
2715         for (prev = NULL, req = *queue; req; prev = req, req = req->next) {
2716                 if (req->trid == ident) {
2717                         /* remove from queue */
2718                         if (!prev)
2719                                 *queue = req->next;
2720                         else
2721                                 prev->next = req->next;
2722
2723                         /* send next pending command */
2724                         if (*queue) {
2725                                 ast_debug(1, "Posting Queued Request:\n%s to %s:%d\n", (*queue)->data,
2726                                         ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
2727
2728                                 mgcp_postrequest(p, sub, (*queue)->data, (*queue)->len, (*queue)->trid);
2729                         }
2730                         break;
2731                 }
2732         }
2733         ast_mutex_unlock(l);
2734         return req;
2735 }
2736
2737 /* modified for new transport mechanism */
2738 static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
2739                 int result, unsigned int ident, struct mgcp_request *resp)
2740 {
2741         char *c;
2742         struct mgcp_request *req;
2743         struct mgcp_gateway *gw = p->parent;
2744
2745         if (result < 200) {
2746                 /* provisional response */
2747                 return;
2748         }
2749
2750         if (p->slowsequence)
2751                 req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident);
2752         else if (sub)
2753                 req = find_command(p, sub, &sub->cx_queue, &sub->cx_queue_lock, ident);
2754         else if (!(req = find_command(p, sub, &p->rqnt_queue, &p->rqnt_queue_lock, ident)))
2755                 req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident);
2756
2757         if (!req) {
2758                 ast_verb(3, "No command found on [%s] for transaction %d. Ignoring...\n",
2759                                 gw->name, ident);
2760                 return;
2761         }
2762
2763         if (p && (result >= 400) && (result <= 599)) {
2764                 switch (result) {
2765                 case 401:
2766                         p->hookstate = MGCP_OFFHOOK;
2767                         break;
2768                 case 402:
2769                         p->hookstate = MGCP_ONHOOK;
2770                         break;
2771                 case 406:
2772                         ast_log(LOG_NOTICE, "Transaction %d timed out\n", ident);
2773                         break;
2774                 case 407:
2775                         ast_log(LOG_NOTICE, "Transaction %d aborted\n", ident);
2776                         break;
2777                 }
2778                 if (sub) {
2779                         if (!sub->cxident[0] && (req->cmd == MGCP_CMD_CRCX)) {
2780                             ast_log(LOG_NOTICE, "DLCX for all connections on %s due to error %d\n", gw->name, result);
2781                             transmit_connection_del(sub);
2782                         }
2783                         if (sub->owner) {
2784                                 ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
2785                                         result, p->name, p->parent->name, sub ? sub->id:-1);
2786                                 mgcp_queue_hangup(sub);
2787                         }
2788                 } else {
2789                         if (p->sub->next->owner) {
2790                                 ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
2791                                         result, p->name, p->parent->name, sub ? sub->id:-1);
2792                                 mgcp_queue_hangup(p->sub);
2793                         }
2794
2795                         if (p->sub->owner) {
2796                                 ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
2797                                         result, p->name, p->parent->name, sub ? sub->id:-1);
2798                                 mgcp_queue_hangup(p->sub);
2799                         }
2800
2801                         dump_cmd_queues(p, NULL);
2802                 }
2803         }
2804
2805         if (resp) {
2806                 /* responseAck: */
2807                 if (result == 200 && (req->cmd == MGCP_CMD_CRCX || req->cmd == MGCP_CMD_MDCX)) {
2808                                 if (sub) {
2809                                         transmit_response(sub, "000", resp, "OK");
2810                                         if (sub->owner && sub->owner->_state == AST_STATE_RINGING) {
2811                                                 ast_queue_control(sub->owner, AST_CONTROL_RINGING);
2812                                         }
2813                                 }
2814                 }
2815                 if (req->cmd == MGCP_CMD_CRCX) {
2816                         if ((c = get_header(resp, "I"))) {
2817                                 if (!ast_strlen_zero(c) && sub) {
2818                                         /* if we are hanging up do not process this conn. */
2819                                         if (sub->owner) {
2820                                                 if (!ast_strlen_zero(sub->cxident)) {
2821                                                         if (strcasecmp(c, sub->cxident)) {
2822                                                                 ast_log(LOG_WARNING, "Subchannel already has a cxident. sub->cxident: %s requested %s\n", sub->cxident, c);
2823                                                         }
2824                                                 }
2825                                                 ast_copy_string(sub->cxident, c, sizeof(sub->cxident));
2826                                                 if (sub->tmpdest.sin_addr.s_addr) {
2827                                                         transmit_modify_with_sdp(sub, NULL, 0);
2828                                                 }
2829                                         } else {
2830                                                 /* XXX delete this one
2831                                                    callid and conn id may already be lost.
2832                                                    so the following del conn may have a side effect of
2833                                                    cleaning up the next subchannel */
2834                                                 transmit_connection_del(sub);
2835                                         }
2836                                 }
2837                         }
2838                 }
2839
2840                 if (req->cmd == MGCP_CMD_AUEP) {
2841                         /* check stale connection ids */
2842                         if ((c = get_header(resp, "I"))) {
2843                                 char *v, *n;
2844                                 int len;
2845                                 while ((v = get_csv(c, &len, &n))) {
2846                                         if (len) {
2847                                                 if (strncasecmp(v, p->sub->cxident, len) &&
2848                                                     strncasecmp(v, p->sub->next->cxident, len)) {
2849                                                         /* connection id not found. delete it */
2850                                                         char cxident[80] = "";
2851
2852                                                         if (len > (sizeof(cxident) - 1))
2853                                                                 len = sizeof(cxident) - 1;
2854                                                         ast_copy_string(cxident, v, len);
2855                                                         ast_verb(3, "Non existing connection id %s on %s@%s \n",
2856                                                                             cxident, p->name, gw->name);
2857                                                         transmit_connection_del_w_params(p, NULL, cxident);
2858                                                 }
2859                                         }
2860                                         c = n;
2861                                 }
2862                         }
2863
2864                         /* Try to determine the hookstate returned from an audit endpoint command */
2865                         if ((c = get_header(resp, "ES"))) {
2866                                 if (!ast_strlen_zero(c)) {
2867                                         if (strstr(c, "hu")) {
2868                                                 if (p->hookstate != MGCP_ONHOOK) {
2869                                                         /* XXX cleanup if we think we are offhook XXX */
2870                                                         if ((p->sub->owner || p->sub->next->owner ) &&
2871                                                             p->hookstate == MGCP_OFFHOOK)
2872                                                                 mgcp_queue_hangup(sub);
2873                                                         p->hookstate = MGCP_ONHOOK;
2874
2875                                                         /* update the requested events according to the new hookstate */
2876                                                         transmit_notify_request(p->sub, "");
2877
2878                                                         ast_verb(3, "Setting hookstate of %s@%s to ONHOOK\n", p->name, gw->name);
2879                                                         }
2880                                         } else if (strstr(c, "hd")) {
2881                                                 if (p->hookstate != MGCP_OFFHOOK) {
2882                                                         p->hookstate = MGCP_OFFHOOK;
2883
2884                                                         /* update the requested events according to the new hookstate */
2885                                                         transmit_notify_request(p->sub, "");
2886
2887                                                         ast_verb(3, "Setting hookstate of %s@%s to OFFHOOK\n", p->name, gw->name);
2888                                                         }
2889                                                 }
2890                                         }
2891                                 }
2892                         }
2893
2894                 if (resp && resp->lines) {
2895                         /* do not process sdp if we are hanging up. this may be a late response */
2896                         if (sub && sub->owner) {
2897                                 if (!sub->rtp)
2898                                         start_rtp(sub);
2899                                 if (sub->rtp)
2900                                         process_sdp(sub, resp);
2901                         }
2902                 }
2903         }
2904
2905         ast_free(req);
2906 }
2907
2908 static void start_rtp(struct mgcp_subchannel *sub)
2909 {
2910         struct ast_sockaddr bindaddr_tmp;
2911
2912         ast_mutex_lock(&sub->lock);
2913         /* check again to be on the safe side */
2914         if (sub->rtp) {
2915                 ast_rtp_instance_destroy(sub->rtp);
2916                 sub->rtp = NULL;
2917         }
2918         /* Allocate the RTP now */
2919         ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
2920         sub->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL);
2921         if (sub->rtp && sub->owner)
2922                 ast_channel_set_fd(sub->owner, 0, ast_rtp_instance_fd(sub->rtp, 0));
2923         if (sub->rtp) {
2924                 ast_rtp_instance_set_qos(sub->rtp, qos.tos_audio, qos.cos_audio, "MGCP RTP");
2925                 ast_rtp_instance_set_prop(sub->rtp, AST_RTP_PROPERTY_NAT, sub->nat);
2926         }
2927         /* Make a call*ID */
2928         snprintf(sub->callid, sizeof(sub->callid), "%08lx%s", ast_random(), sub->txident);
2929         /* Transmit the connection create */
2930         if(!sub->parent->pktcgatealloc) {
2931                 transmit_connect_with_sdp(sub, NULL);
2932         } else {
2933                 transmit_connect(sub);
2934                 sub->gate = NULL;
2935                 if(!mgcp_alloc_pktcgate(sub))
2936                         mgcp_queue_hangup(sub);
2937         }
2938         ast_mutex_unlock(&sub->lock);
2939 }
2940
2941 static void *mgcp_ss(void *data)
2942 {
2943         struct ast_channel *chan = data;
2944         struct mgcp_subchannel *sub = chan->tech_pvt;
2945         struct mgcp_endpoint *p = sub->parent;
2946         /* char exten[AST_MAX_EXTENSION] = ""; */
2947         int len = 0;
2948         int timeout = firstdigittimeout;
2949         int res= 0;
2950         int getforward = 0;
2951         int loop_pause = 100;
2952
2953         len = strlen(p->dtmf_buf);
2954
2955         while (len < AST_MAX_EXTENSION - 1) {
2956                 ast_debug(1, "Dtmf buffer '%s' for '%s@%s'\n", p->dtmf_buf, p->name, p->parent->name);
2957                 res = 1;  /* Assume that we will get a digit */
2958                 while (strlen(p->dtmf_buf) == len) {
2959                         ast_safe_sleep(chan, loop_pause);
2960                         timeout -= loop_pause;
2961                         if (timeout <= 0){
2962                                 res = 0;
2963                                 break;
2964                         }
2965                         res = 1;
2966                 }
2967
2968                 timeout = 0;
2969                 len = strlen(p->dtmf_buf);
2970
2971                 if (!ast_ignore_pattern(chan->context, p->dtmf_buf)) {
2972                         /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
2973                         ast_indicate(chan, -1);
2974                 } else {
2975                         /* XXX Redundant?  We should already be playing dialtone */
2976                         /*tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALTONE);*/
2977                         transmit_notify_request(sub, "L/dl");
2978                 }
2979                 if (ast_exists_extension(chan, chan->context, p->dtmf_buf, 1, p->cid_num)) {
2980                         if (!res || !ast_matchmore_extension(chan, chan->context, p->dtmf_buf, 1, p->cid_num)) {
2981                                 if (getforward) {
2982                                         /* Record this as the forwarding extension */
2983                                         ast_copy_string(p->call_forward, p->dtmf_buf, sizeof(p->call_forward));
2984                                         ast_verb(3, "Setting call forward to '%s' on channel %s\n",
2985                                                         p->call_forward, chan->name);
2986                                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
2987                                         transmit_notify_request(sub, "L/sl");
2988                                         if (res)
2989                                                 break;
2990                                         usleep(500000);
2991                                         /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
2992                                         ast_indicate(chan, -1);
2993                                         sleep(1);
2994                                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
2995                                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALTONE);*/
2996                                         transmit_notify_request(sub, "L/dl");
2997                                         len = 0;
2998                                         getforward = 0;
2999                                 } else {
3000                                         /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
3001                                         ast_indicate(chan, -1);
3002                                         ast_copy_string(chan->exten, p->dtmf_buf, sizeof(chan->exten));
3003                                         chan->dialed.number.str = ast_strdup(p->dtmf_buf);
3004                                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3005                                         ast_set_callerid(chan,
3006                                                 p->hidecallerid ? "" : p->cid_num,
3007                                                 p->hidecallerid ? "" : p->cid_name,
3008                                                 chan->caller.ani.number.valid ? NULL : p->cid_num);
3009                                         ast_setstate(chan, AST_STATE_RING);
3010                                         /*dahdi_enable_ec(p);*/
3011                                         if (p->dtmfmode & MGCP_DTMF_HYBRID) {
3012                                                 p->dtmfmode |= MGCP_DTMF_INBAND;
3013                                                 ast_indicate(chan, -1);
3014                                         }
3015                                         res = ast_pbx_run(chan);
3016                                         if (res) {
3017                                                 ast_log(LOG_WARNING, "PBX exited non-zero\n");
3018                                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
3019                                                 /*transmit_notify_request(p, "nbz", 1);*/
3020                                                 transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
3021                                         }
3022                                         return NULL;
3023                                 }
3024                         } else {
3025                                 /* It's a match, but they just typed a digit, and there is an ambiguous match,
3026                                    so just set the timeout to matchdigittimeout and wait some more */
3027                                 timeout = matchdigittimeout;
3028                         }
3029                 } else if (res == 0) {
3030                         ast_debug(1, "not enough digits (and no ambiguous match)...\n");
3031                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
3032                         transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
3033                         /*dahdi_wait_event(p->subs[index].zfd);*/
3034                         ast_hangup(chan);
3035                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3036                         return NULL;
3037                 } else if (p->hascallwaiting && p->callwaiting && !strcmp(p->dtmf_buf, "*70")) {
3038                         ast_verb(3, "Disabling call waiting on %s\n", chan->name);
3039                         /* Disable call waiting if enabled */
3040                         p->callwaiting = 0;
3041                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3042                         transmit_notify_request(sub, "L/sl");
3043                         len = 0;
3044                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3045                         timeout = firstdigittimeout;
3046                 } else if (!strcmp(p->dtmf_buf,ast_pickup_ext())) {
3047                         /* Scan all channels and see if any there
3048                          * ringing channqels with that have call groups
3049                          * that equal this channels pickup group
3050                          */
3051                         if (ast_pickup_call(chan)) {
3052                                 ast_log(LOG_WARNING, "No call pickup possible...\n");
3053                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
3054                                 transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
3055                         }
3056                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3057                         ast_hangup(chan);
3058                         return NULL;
3059                 } else if (!p->hidecallerid && !strcmp(p->dtmf_buf, "*67")) {
3060                         ast_verb(3, "Disabling Caller*ID on %s\n", chan->name);
3061                         /* Disable Caller*ID if enabled */
3062                         p->hidecallerid = 1;
3063                         ast_set_callerid(chan, "", "", NULL);
3064                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3065                         transmit_notify_request(sub, "L/sl");
3066                         len = 0;
3067                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3068                         timeout = firstdigittimeout;
3069                 } else if (p->callreturn && !strcmp(p->dtmf_buf, "*69")) {
3070                         res = 0;
3071                         if (!ast_strlen_zero(p->lastcallerid)) {
3072                                 res = ast_say_digit_str(chan, p->lastcallerid, "", chan->language);
3073                         }
3074                         if (!res)
3075                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3076                                 transmit_notify_request(sub, "L/sl");
3077                         break;
3078                 } else if (!strcmp(p->dtmf_buf, "*78")) {
3079                         /* Do not disturb */
3080                         ast_verb(3, "Enabled DND on channel %s\n", chan->name);
3081                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3082                         transmit_notify_request(sub, "L/sl");
3083                         p->dnd = 1;
3084                         getforward = 0;
3085                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3086                         len = 0;
3087                 } else if (!strcmp(p->dtmf_buf, "*79")) {
3088                         /* Do not disturb */
3089                         ast_verb(3, "Disabled DND on channel %s\n", chan->name);
3090                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3091                         transmit_notify_request(sub, "L/sl");
3092                         p->dnd = 0;
3093                         getforward = 0;
3094                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3095                         len = 0;
3096                 } else if (p->cancallforward && !strcmp(p->dtmf_buf, "*72")) {
3097                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3098                         transmit_notify_request(sub, "L/sl");
3099                         getforward = 1;
3100                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3101                         len = 0;
3102                 } else if (p->cancallforward && !strcmp(p->dtmf_buf, "*73")) {
3103                         ast_verb(3, "Cancelling call forwarding on channel %s\n", chan->name);
3104                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3105                         transmit_notify_request(sub, "L/sl");
3106                         memset(p->call_forward, 0, sizeof(p->call_forward));
3107                         getforward = 0;
3108                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3109                         len = 0;
3110                 } else if (!strcmp(p->dtmf_buf, ast_parking_ext()) &&
3111                         sub->next->owner && ast_bridged_channel(sub->next->owner)) {
3112                         /* This is a three way call, the main call being a real channel,
3113                            and we're parking the first call. */
3114                         ast_masq_park_call(ast_bridged_channel(sub->next->owner), chan, 0, NULL);
3115                         ast_verb(3, "Parking call to '%s'\n", chan->name);
3116                         break;
3117                 } else if (!ast_strlen_zero(p->lastcallerid) && !strcmp(p->dtmf_buf, "*60")) {
3118                         ast_verb(3, "Blacklisting number %s\n", p->lastcallerid);
3119                         res = ast_db_put("blacklist", p->lastcallerid, "1");
3120                         if (!res) {
3121                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3122                                 transmit_notify_request(sub, "L/sl");
3123                                 memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3124                                 len = 0;
3125                         }
3126                 } else if (p->hidecallerid && !strcmp(p->dtmf_buf, "*82")) {
3127                         ast_verb(3, "Enabling Caller*ID on %s\n", chan->name);
3128                         /* Enable Caller*ID if enabled */
3129                         p->hidecallerid = 0;
3130                         ast_set_callerid(chan, p->cid_num, p->cid_name, NULL);
3131                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3132                         transmit_notify_request(sub, "L/sl");
3133                         len = 0;
3134                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3135                         timeout = firstdigittimeout;
3136                 } else if (!ast_canmatch_extension(chan, chan->context, p->dtmf_buf, 1,
3137                         S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL))
3138                         && ((p->dtmf_buf[0] != '*') || (strlen(p->dtmf_buf) > 2))) {
3139                         ast_debug(1, "Can't match %s from '%s' in context %s\n", p->dtmf_buf,
3140                                 S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, "<Unknown Caller>"),
3141                                 chan->context);
3142                         break;
3143                 }
3144                 if (!timeout)
3145                         timeout = gendigittimeout;
3146                 if (len && !ast_ignore_pattern(chan->context, p->dtmf_buf))
3147                         /*tone_zone_play_tone(p->subs[index].zfd, -1);*/
3148                         ast_indicate(chan, -1);
3149         }
3150 #if 0
3151         for (;;) {
3152                 res = ast_waitfordigit(chan, to);
3153                 if (!res) {
3154                         ast_debug(1, "Timeout...\n");
3155                         break;
3156                 }
3157                 if (res < 0) {
3158                         ast_debug(1, "Got hangup...\n");
3159                         ast_hangup(chan);
3160                         break;
3161                 }
3162                 exten[pos++] = res;
3163                 if (!ast_ignore_pattern(chan->context, exten))
3164                         ast_indicate(chan, -1);
3165                 if (ast_matchmore_extension(chan, chan->context, exten, 1, chan->callerid)) {
3166                         if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid))
3167                                 to = 3000;
3168                         else
3169                                 to = 8000;
3170                 } else
3171                         break;
3172         }
3173         if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid)) {
3174                 ast_copy_string(chan->exten, exten, sizeof(chan->exten)1);
3175                 if (!p->rtp) {
3176                         start_rtp(p);
3177                 }
3178                 ast_setstate(chan, AST_STATE_RING);
3179                 chan->rings = 1;
3180                 if (ast_pbx_run(chan)) {
3181                         ast_log(LOG_WARNING, "Unable to launch PBX on %s\n", chan->name);
3182                 } else {
3183                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3184                         return NULL;
3185                 }
3186         }
3187 #endif
3188         ast_hangup(chan);
3189         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3190         return NULL;
3191 }
3192
3193 static int attempt_transfer(struct mgcp_endpoint *p)
3194 {
3195         /* *************************
3196          * I hope this works.
3197          * Copied out of chan_zap
3198          * Cross your fingers
3199          * *************************/
3200
3201         /* In order to transfer, we need at least one of the channels to
3202            actually be in a call bridge.  We can't conference two applications
3203            together (but then, why would we want to?) */
3204         if (ast_bridged_channel(p->sub->owner)) {
3205                 /* The three-way person we're about to transfer to could still be in MOH, so
3206                    stop if now if appropriate */
3207                 if (ast_bridged_channel(p->sub->next->owner))
3208                         ast_queue_control(p->sub->next->owner, AST_CONTROL_UNHOLD);
3209                 if (p->sub->owner->_state == AST_STATE_RINGING) {
3210                         ast_indicate(ast_bridged_channel(p->sub->next->owner), AST_CONTROL_RINGING);
3211                 }
3212                 if (ast_channel_masquerade(p->sub->next->owner, ast_bridged_channel(p->sub->owner))) {
3213                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
3214                                 ast_bridged_channel(p->sub->owner)->name, p->sub->next->owner->name);
3215                         return -1;
3216                 }
3217                 /* Orphan the channel */
3218                 unalloc_sub(p->sub->next);
3219         } else if (ast_bridged_channel(p->sub->next->owner)) {
3220                 if (p->sub->owner->_state == AST_STATE_RINGING) {
3221                         ast_indicate(ast_bridged_channel(p->sub->next->owner), AST_CONTROL_RINGING);
3222                 }
3223                 ast_queue_control(p->sub->next->owner, AST_CONTROL_UNHOLD);
3224                 if (ast_channel_masquerade(p->sub->owner, ast_bridged_channel(p->sub->next->owner))) {
3225                         ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
3226                                 ast_bridged_channel(p->sub->next->owner)->name, p->sub->owner->name);
3227                         return -1;
3228                 }
3229                 /*swap_subs(p, SUB_THREEWAY, SUB_REAL);*/
3230                 ast_verb(3, "Swapping %d for %d on %s@%s\n", p->sub->id, p->sub->next->id, p->name, p->parent->name);
3231                 p->sub = p->sub->next;
3232                 unalloc_sub(p->sub->next);
3233                 /* Tell the caller not to hangup */
3234                 return 1;
3235         } else {
3236                 ast_debug(1, "Neither %s nor %s are in a bridge, nothing to transfer\n",
3237                         p->sub->owner->name, p->sub->next->owner->name);
3238                 p->sub->next->owner->_softhangup |= AST_SOFTHANGUP_DEV;
3239                 if (p->sub->next->owner) {
3240                         p->sub->next->alreadygone = 1;
3241                         mgcp_queue_hangup(p->sub->next);
3242                 }
3243         }
3244         return 0;
3245 }
3246
3247 static void handle_hd_hf(struct mgcp_subchannel *sub, char *ev)
3248 {
3249         struct mgcp_endpoint *p = sub->parent;
3250         struct ast_channel *c;
3251         pthread_t t;
3252
3253         /* Off hook / answer */
3254         if (sub->outgoing) {
3255                 /* Answered */
3256                 if (sub->owner) {
3257                         if (ast_bridged_channel(sub->owner))
3258                                 ast_queue_control(sub->owner, AST_CONTROL_UNHOLD);
3259                         sub->cxmode = MGCP_CX_SENDRECV;
3260                         if (!sub->rtp) {
3261                                 start_rtp(sub);
3262                         } else {
3263                                 transmit_modify_request(sub);
3264                         }
3265                         /*transmit_notify_request(sub, "aw");*/
3266                         transmit_notify_request(sub, "");
3267                         mgcp_queue_control(sub, AST_CONTROL_ANSWER);
3268                 }
3269         } else {
3270                 /* Start switch */
3271                 /*sub->cxmode = MGCP_CX_SENDRECV;*/
3272                 if (!sub->owner) {
3273                         if (!sub->rtp) {
3274                                 start_rtp(sub);
3275                         } else {
3276                                 transmit_modify_request(sub);
3277                         }
3278                         if (p->immediate) {
3279                                 /* The channel is immediately up. Start right away */
3280 #ifdef DLINK_BUGGY_FIRMWARE
3281                                 transmit_notify_request(sub, "rt");
3282 #else
3283                                 transmit_notify_request(sub, p->ncs ? "L/rt" : "G/rt");
3284 #endif
3285                                 c = mgcp_new(sub, AST_STATE_RING, NULL);
3286                                 if (!c) {
3287                                         ast_log(LOG_WARNING, "Unable to start PBX on channel %s@%s\n", p->name, p->parent->name);
3288                                         transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
3289                                         ast_hangup(c);
3290                                 }
3291                         } else {
3292                                 if (has_voicemail(p)) {
3293                                         transmit_notify_request(sub, "L/sl");
3294                                 } else {
3295                                         transmit_notify_request(sub, "L/dl");
3296                                 }
3297                                 c = mgcp_new(sub, AST_STATE_DOWN, NULL);
3298                                 if (c) {
3299                                         if (ast_pthread_create_detached(&t, NULL, mgcp_ss, c)) {
3300                                                 ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno));
3301                                                 ast_hangup(c);
3302                                         }
3303                                 } else {
3304                                         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", p->name, p->parent->name);
3305                                 }
3306                         }
3307                 } else {
3308                         if (p->hookstate == MGCP_OFFHOOK) {
3309                                 ast_log(LOG_WARNING, "Off hook, but already have owner on %s@%s\n", p->name, p->parent->name);
3310                         } else {
3311                                 ast_log(LOG_WARNING, "On hook, but already have owner on %s@%s\n", p->name, p->parent->name);
3312                                 ast_log(LOG_WARNING, "If we're onhook why are we here trying to handle a hd or hf?\n");
3313                         }
3314                         if (ast_bridged_channel(sub->owner))
3315                                 ast_queue_control(sub->owner, AST_CONTROL_UNHOLD);
3316                         sub->cxmode = MGCP_CX_SENDRECV;
3317                         if (!sub->rtp) {
3318                                 start_rtp(sub);
3319                         } else {
3320                                 transmit_modify_request(sub);
3321                         }
3322                         /*transmit_notify_request(sub, "aw");*/
3323                         transmit_notify_request(sub, "");
3324                         /*ast_queue_control(sub->owner, AST_CONTROL_ANSWER);*/
3325                 }
3326         }
3327 }
3328
3329 static int handle_request(struct mgcp_subchannel *sub, struct mgcp_request *req, struct sockaddr_in *sin)
3330 {
3331         char *ev, *s;
3332         struct ast_frame f = { 0, };
3333         struct mgcp_endpoint *p = sub->parent;
3334         struct mgcp_gateway *g = NULL;
3335         int res;
3336
3337         ast_debug(1, "Handling request '%s' on %s@%s\n", req->verb, p->name, p->parent->name);
3338         /* Clear out potential response */
3339         if (!strcasecmp(req->verb, "RSIP")) {
3340                 /* Test if this RSIP request is just a keepalive */
3341                 if (!strcasecmp( get_header(req, "RM"), "X-keepalive")) {
3342                         ast_verb(3, "Received keepalive request from %s@%s\n", p->name, p->parent->name);
3343                         transmit_response(sub, "200", req, "OK");
3344                 } else {
3345                         dump_queue(p->parent, p);
3346                         dump_cmd_queues(p, NULL);
3347
3348                         if ((strcmp(p->name, p->parent->wcardep) != 0)) {
3349                                 ast_verb(3, "Resetting interface %s@%s\n", p->name, p->parent->name);
3350                         }
3351                         /* For RSIP on wildcard we reset all endpoints */
3352                         if (!strcmp(p->name, p->parent->wcardep)) {
3353                                 /* Reset all endpoints */
3354                                 struct mgcp_endpoint *tmp_ep;
3355
3356                                 g = p->parent;
3357                                 for (tmp_ep = g->endpoints; tmp_ep; tmp_ep = tmp_ep->next) {
3358                                         /*if ((strcmp(tmp_ep->name, "*") != 0) && (strcmp(tmp_ep->name, "aaln/" "*") != 0)) {*/
3359                                         if (strcmp(tmp_ep->name, g->wcardep) != 0) {
3360                                                 struct mgcp_subchannel *tmp_sub, *first_sub;
3361                                                 ast_verb(3, "Resetting interface %s@%s\n", tmp_ep->name, p->parent->name);
3362
3363                                                 first_sub = tmp_ep->sub;
3364                                                 tmp_sub = tmp_ep->sub;
3365                                                 while (tmp_sub) {
3366                                                         mgcp_queue_hangup(tmp_sub);
3367                                                         tmp_sub = tmp_sub->next;
3368                                                         if (tmp_sub == first_sub)
3369                                                                 break;
3370                                                 }
3371                                         }
3372                                 }
3373                         } else if (sub->owner) {
3374                                 mgcp_queue_hangup(sub);
3375                         }
3376                         transmit_response(sub, "200", req, "OK");
3377                         /* We don't send NTFY or AUEP to wildcard ep */
3378                         if (strcmp(p->name, p->parent->wcardep) != 0) {
3379                                 transmit_notify_request(sub, "");
3380                                 /* Audit endpoint.
3381                                  Idea is to prevent lost lines due to race conditions
3382                                 */
3383                                 transmit_audit_endpoint(p);
3384                         }
3385                 }
3386         } else if (!strcasecmp(req->verb, "NTFY")) {
3387                 /* Acknowledge and be sure we keep looking for the same things */
3388                 transmit_response(sub, "200", req, "OK");
3389                 /* Notified of an event */
3390                 ev = get_header(req, "O");
3391                 s = strchr(ev, '/');
3392                 if (s) ev = s + 1;
3393                 ast_debug(1, "Endpoint '%s@%s-%d' observed '%s'\n", p->name, p->parent->name, sub->id, ev);
3394                 /* Keep looking for events unless this was a hangup */
3395                 if (strcasecmp(ev, "hu") && strcasecmp(ev, "hd") && strcasecmp(ev, "ping")) {
3396                         transmit_notify_request(sub, p->curtone);
3397                 }
3398                 if (!strcasecmp(ev, "hd")) {
3399                         p->hookstate = MGCP_OFFHOOK;
3400                         sub->cxmode = MGCP_CX_SENDRECV;
3401
3402                         if (p) {
3403                           /* When the endpoint have a Off hook transition we allways
3404                              starts without any previous dtmfs */
3405                           memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3406                         }
3407
3408                         handle_hd_hf(sub, ev);
3409                 } else if (!strcasecmp(ev, "hf")) {
3410                         /* We can assume we are offhook if we received a hookflash */
3411                         /* First let's just do call wait and ignore threeway */
3412                         /* We're currently in charge */
3413                         if (p->hookstate != MGCP_OFFHOOK) {
3414                                 /* Cisco c7940 sends hf even if the phone is onhook */
3415                                 /* Thanks to point on IRC for pointing this out */
3416                                 return -1;
3417                         }
3418                         /* do not let * conference two down channels */
3419                         if (sub->owner && sub->owner->_state == AST_STATE_DOWN && !sub->next->owner)
3420                                 return -1;
3421
3422                         if (p->callwaiting || p->transfer || p->threewaycalling) {
3423                      &nb