D'oh! Defaultenabled FTL.
[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, ast->connected.id.number, ast->connected.id.name);
902                 ast_setstate(ast, AST_STATE_RINGING);
903
904                 if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) {
905                         /* Put the connection back in sendrecv */
906                         sub->next->cxmode = MGCP_CX_SENDRECV;
907                         transmit_modify_request(sub->next);
908                 }
909         } else {
910                 ast_log(LOG_NOTICE, "Don't know how to dial on trunks yet\n");
911                 res = -1;
912         }
913         ast_mutex_unlock(&sub->lock);
914         return res;
915 }
916
917 static int mgcp_hangup(struct ast_channel *ast)
918 {
919         struct mgcp_subchannel *sub = ast->tech_pvt;
920         struct mgcp_endpoint *p = sub->parent;
921
922         ast_debug(1, "mgcp_hangup(%s)\n", ast->name);
923         if (!ast->tech_pvt) {
924                 ast_debug(1, "Asked to hangup channel not connected\n");
925                 return 0;
926         }
927         if (strcmp(sub->magic, MGCP_SUBCHANNEL_MAGIC)) {
928                 ast_debug(1, "Invalid magic. MGCP subchannel freed up already.\n");
929                 return 0;
930         }
931         ast_mutex_lock(&sub->lock);
932         ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s\n", ast->name, p->name, p->parent->name);
933
934         if ((p->dtmfmode & MGCP_DTMF_INBAND) && p->dsp) {
935                 /* check whether other channel is active. */
936                 if (!sub->next->owner) {
937                         if (p->dtmfmode & MGCP_DTMF_HYBRID) {
938                                 p->dtmfmode &= ~MGCP_DTMF_INBAND;
939                         }
940                         ast_debug(2, "MGCP free dsp on %s@%s\n", p->name, p->parent->name);
941                         ast_dsp_free(p->dsp);
942                         p->dsp = NULL;
943                 }
944         }
945
946         sub->owner = NULL;
947
948         /* for deleting gate */
949         if (p->pktcgatealloc && sub->gate) {
950                 sub->gate->gate_open = NULL;
951                 sub->gate->gate_remove = NULL;
952                 sub->gate->got_dq_gi = NULL;
953                 sub->gate->tech_pvt = NULL;
954                 if (sub->gate->state == GATE_ALLOC_PROGRESS || sub->gate->state == GATE_ALLOCATED) {
955                         ast_pktccops_gate_alloc(GATE_DEL, sub->gate, 0, 0, 0, 0, 0, 0, NULL, NULL);
956                 } else {
957                         sub->gate->deltimer = time(NULL) + 5;
958                 }
959                 sub->gate = NULL;
960         }
961
962         if (!ast_strlen_zero(sub->cxident)) {
963                 transmit_connection_del(sub);
964         }
965         sub->cxident[0] = '\0';
966         if ((sub == p->sub) && sub->next->owner) {
967                 if (p->hookstate == MGCP_OFFHOOK) {
968                         if (sub->next->owner && ast_bridged_channel(sub->next->owner)) {
969                                 /* ncs fix! */
970                                 transmit_notify_request_with_callerid(p->sub, (p->ncs ? "L/wt1" : "L/wt"), ast_bridged_channel(sub->next->owner)->cid.cid_num, ast_bridged_channel(sub->next->owner)->cid.cid_name);
971                         }
972                 } else {
973                         /* set our other connection as the primary and swith over to it */
974                         p->sub = sub->next;
975                         p->sub->cxmode = MGCP_CX_RECVONLY;
976                         transmit_modify_request(p->sub);
977                         if (sub->next->owner && ast_bridged_channel(sub->next->owner)) {
978                                 transmit_notify_request_with_callerid(p->sub, "L/rg", ast_bridged_channel(sub->next->owner)->cid.cid_num, ast_bridged_channel(sub->next->owner)->cid.cid_name);
979                         }
980                 }
981
982         } else if ((sub == p->sub->next) && p->hookstate == MGCP_OFFHOOK) {
983                 transmit_notify_request(sub, p->ncs ? "" : "L/v");
984         } else if (p->hookstate == MGCP_OFFHOOK) {
985                 transmit_notify_request(sub, "L/ro");
986         } else {
987                 transmit_notify_request(sub, "");
988         }
989
990         ast->tech_pvt = NULL;
991         sub->alreadygone = 0;
992         sub->outgoing = 0;
993         sub->cxmode = MGCP_CX_INACTIVE;
994         sub->callid[0] = '\0';
995         if (p) {
996                 memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
997         }
998         /* Reset temporary destination */
999         memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
1000         if (sub->rtp) {
1001                 ast_rtp_instance_destroy(sub->rtp);
1002                 sub->rtp = NULL;
1003         }
1004
1005         ast_module_unref(ast_module_info->self);
1006
1007         if ((p->hookstate == MGCP_ONHOOK) && (!sub->next->rtp)) {
1008                 p->hidecallerid = 0;
1009                 if (p->hascallwaiting && !p->callwaiting) {
1010                         ast_verb(3, "Enabling call waiting on %s\n", ast->name);
1011                         p->callwaiting = -1;
1012                 }
1013                 if (has_voicemail(p)) {
1014                         ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s set vmwi(+)\n",
1015                                 ast->name, p->name, p->parent->name);
1016                         transmit_notify_request(sub, "L/vmwi(+)");
1017                 } else {
1018                         ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s set vmwi(-)\n",
1019                                 ast->name, p->name, p->parent->name);
1020                         transmit_notify_request(sub, "L/vmwi(-)");
1021                 }
1022         }
1023         ast_mutex_unlock(&sub->lock);
1024         return 0;
1025 }
1026
1027 static char *handle_mgcp_show_endpoints(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1028 {
1029         struct mgcp_gateway  *mg;
1030         struct mgcp_endpoint *me;
1031         int hasendpoints = 0;
1032         struct ast_variable * v = NULL;
1033
1034         switch (cmd) {
1035         case CLI_INIT:
1036                 e->command = "mgcp show endpoints";
1037                 e->usage =
1038                         "Usage: mgcp show endpoints\n"
1039                         "       Lists all endpoints known to the MGCP (Media Gateway Control Protocol) subsystem.\n";
1040                 return NULL;
1041         case CLI_GENERATE:
1042                 return NULL;
1043         }
1044
1045         if (a->argc != 3) {
1046                 return CLI_SHOWUSAGE;
1047         }
1048         ast_mutex_lock(&gatelock);
1049         for (mg = gateways; mg; mg = mg->next) {
1050                 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");
1051                 for (me = mg->endpoints; me; me = me->next) {
1052                         ast_cli(a->fd, "   -- '%s@%s in '%s' is %s\n", me->name, mg->name, me->context, me->sub->owner ? "active" : "idle");
1053                         if (me->chanvars) {
1054                                 ast_cli(a->fd, "  Variables:\n");
1055                                 for (v = me->chanvars ; v ; v = v->next) {
1056                                         ast_cli(a->fd, "    %s = '%s'\n", v->name, v->value);
1057                                 }
1058                         }
1059                         hasendpoints = 1;
1060                 }
1061                 if (!hasendpoints) {
1062                         ast_cli(a->fd, "   << No Endpoints Defined >>     ");
1063                 }
1064         }
1065         ast_mutex_unlock(&gatelock);
1066         return CLI_SUCCESS;
1067 }
1068
1069 static char *handle_mgcp_audit_endpoint(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1070 {
1071         struct mgcp_gateway  *mg;
1072         struct mgcp_endpoint *me;
1073         int found = 0;
1074         char *ename,*gname, *c;
1075
1076         switch (cmd) {
1077         case CLI_INIT:
1078                 e->command = "mgcp audit endpoint";
1079                 e->usage =
1080                         "Usage: mgcp audit endpoint <endpointid>\n"
1081                         "       Lists the capabilities of an endpoint in the MGCP (Media Gateway Control Protocol) subsystem.\n"
1082                         "       mgcp debug MUST be on to see the results of this command.\n";
1083                 return NULL;
1084         case CLI_GENERATE:
1085                 return NULL;
1086         }
1087
1088         if (!mgcpdebug) {
1089                 return CLI_SHOWUSAGE;
1090         }
1091         if (a->argc != 4)
1092                 return CLI_SHOWUSAGE;
1093         /* split the name into parts by null */
1094         ename = ast_strdupa(a->argv[3]);
1095         for (gname = ename; *gname; gname++) {
1096                 if (*gname == '@') {
1097                         *gname = 0;
1098                         gname++;
1099                         break;
1100                 }
1101         }
1102         if (gname[0] == '[') {
1103                 gname++;
1104         }
1105         if ((c = strrchr(gname, ']'))) {
1106                 *c = '\0';
1107         }
1108         ast_mutex_lock(&gatelock);
1109         for (mg = gateways; mg; mg = mg->next) {
1110                 if (!strcasecmp(mg->name, gname)) {
1111                         for (me = mg->endpoints; me; me = me->next) {
1112                                 if (!strcasecmp(me->name, ename)) {
1113                                         found = 1;
1114                                         transmit_audit_endpoint(me);
1115                                         break;
1116                                 }
1117                         }
1118                         if (found) {
1119                                 break;
1120                         }
1121                 }
1122         }
1123         if (!found) {
1124                 ast_cli(a->fd, "   << Could not find endpoint >>     ");
1125         }
1126         ast_mutex_unlock(&gatelock);
1127         return CLI_SUCCESS;
1128 }
1129
1130 static char *handle_mgcp_set_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1131 {
1132         switch (cmd) {
1133         case CLI_INIT:
1134                 e->command = "mgcp set debug {on|off}";
1135                 e->usage =
1136                         "Usage: mgcp set debug {on|off}\n"
1137                         "       Enables/Disables dumping of MGCP packets for debugging purposes\n";     
1138                 return NULL;
1139         case CLI_GENERATE:
1140                 return NULL;
1141         }
1142
1143         if (a->argc != e->args)
1144                 return CLI_SHOWUSAGE;
1145
1146         if (!strncasecmp(a->argv[e->args - 1], "on", 2)) {
1147                 mgcpdebug = 1;
1148                 ast_cli(a->fd, "MGCP Debugging Enabled\n");
1149         } else if (!strncasecmp(a->argv[3], "off", 3)) {
1150                 mgcpdebug = 0;
1151                 ast_cli(a->fd, "MGCP Debugging Disabled\n");
1152         } else {
1153                 return CLI_SHOWUSAGE;
1154         }
1155         return CLI_SUCCESS;
1156 }
1157
1158 static struct ast_cli_entry cli_mgcp[] = {
1159         AST_CLI_DEFINE(handle_mgcp_audit_endpoint, "Audit specified MGCP endpoint"),
1160         AST_CLI_DEFINE(handle_mgcp_show_endpoints, "List defined MGCP endpoints"),
1161         AST_CLI_DEFINE(handle_mgcp_set_debug, "Enable/Disable MGCP debugging"),
1162         AST_CLI_DEFINE(mgcp_reload, "Reload MGCP configuration"),
1163 };
1164
1165 static int mgcp_answer(struct ast_channel *ast)
1166 {
1167         int res = 0;
1168         struct mgcp_subchannel *sub = ast->tech_pvt;
1169         struct mgcp_endpoint *p = sub->parent;
1170
1171         ast_mutex_lock(&sub->lock);
1172         sub->cxmode = MGCP_CX_SENDRECV;
1173         if (!sub->rtp) {
1174                 start_rtp(sub);
1175         } else {
1176                 transmit_modify_request(sub);
1177         }
1178         ast_verb(3, "MGCP mgcp_answer(%s) on %s@%s-%d\n",
1179                         ast->name, p->name, p->parent->name, sub->id);
1180         if (ast->_state != AST_STATE_UP) {
1181                 ast_setstate(ast, AST_STATE_UP);
1182                 ast_debug(1, "mgcp_answer(%s)\n", ast->name);
1183                 transmit_notify_request(sub, "");
1184                 transmit_modify_request(sub);
1185         }
1186         ast_mutex_unlock(&sub->lock);
1187         return res;
1188 }
1189
1190 static struct ast_frame *mgcp_rtp_read(struct mgcp_subchannel *sub)
1191 {
1192         /* Retrieve audio/etc from channel.  Assumes sub->lock is already held. */
1193         struct ast_frame *f;
1194
1195         f = ast_rtp_instance_read(sub->rtp, 0);
1196         /* Don't send RFC2833 if we're not supposed to */
1197         if (f && (f->frametype == AST_FRAME_DTMF) && !(sub->parent->dtmfmode & MGCP_DTMF_RFC2833))
1198                 return &ast_null_frame;
1199         if (sub->owner) {
1200                 /* We already hold the channel lock */
1201                 if (f->frametype == AST_FRAME_VOICE) {
1202                         if (f->subclass.codec != sub->owner->nativeformats) {
1203                                 ast_debug(1, "Oooh, format changed to %s\n", ast_getformatname(f->subclass.codec));
1204                                 sub->owner->nativeformats = f->subclass.codec;
1205                                 ast_set_read_format(sub->owner, sub->owner->readformat);
1206                                 ast_set_write_format(sub->owner, sub->owner->writeformat);
1207                         }
1208                         /* Courtesy fearnor aka alex@pilosoft.com */
1209                         if ((sub->parent->dtmfmode & MGCP_DTMF_INBAND) && (sub->parent->dsp)) {
1210 #if 0
1211                                 ast_log(LOG_NOTICE, "MGCP ast_dsp_process\n");
1212 #endif
1213                                 f = ast_dsp_process(sub->owner, sub->parent->dsp, f);
1214                         }
1215                 }
1216         }
1217         return f;
1218 }
1219
1220
1221 static struct ast_frame *mgcp_read(struct ast_channel *ast)
1222 {
1223         struct ast_frame *f;
1224         struct mgcp_subchannel *sub = ast->tech_pvt;
1225         ast_mutex_lock(&sub->lock);
1226         f = mgcp_rtp_read(sub);
1227         ast_mutex_unlock(&sub->lock);
1228         return f;
1229 }
1230
1231 static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame)
1232 {
1233         struct mgcp_subchannel *sub = ast->tech_pvt;
1234         int res = 0;
1235         char buf[256];
1236
1237         if (frame->frametype != AST_FRAME_VOICE) {
1238                 if (frame->frametype == AST_FRAME_IMAGE)
1239                         return 0;
1240                 else {
1241                         ast_log(LOG_WARNING, "Can't send %d type frames with MGCP write\n", frame->frametype);
1242                         return 0;
1243                 }
1244         } else {
1245                 if (!(frame->subclass.codec & ast->nativeformats)) {
1246                         ast_log(LOG_WARNING, "Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
1247                                 ast_getformatname(frame->subclass.codec),
1248                                 ast_getformatname_multiple(buf, sizeof(buf), ast->nativeformats),
1249                                 ast_getformatname(ast->readformat),
1250                                 ast_getformatname(ast->writeformat));
1251                         /* return -1; */
1252                 }
1253         }
1254         if (sub) {
1255                 ast_mutex_lock(&sub->lock);
1256                 if (!sub->sdpsent && sub->gate) {
1257                         if (sub->gate->state == GATE_ALLOCATED) {
1258                                 ast_debug(1, "GATE ALLOCATED, sending sdp\n");
1259                                 transmit_modify_with_sdp(sub, NULL, 0);
1260                         }
1261                 }
1262                 if ((sub->parent->sub == sub) || !sub->parent->singlepath) {
1263                         if (sub->rtp) {
1264                                 res =  ast_rtp_instance_write(sub->rtp, frame);
1265                         }
1266                 }
1267                 ast_mutex_unlock(&sub->lock);
1268         }
1269         return res;
1270 }
1271
1272 static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1273 {
1274         struct mgcp_subchannel *sub = newchan->tech_pvt;
1275
1276         ast_mutex_lock(&sub->lock);
1277         ast_log(LOG_NOTICE, "mgcp_fixup(%s, %s)\n", oldchan->name, newchan->name);
1278         if (sub->owner != oldchan) {
1279                 ast_mutex_unlock(&sub->lock);
1280                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, sub->owner);
1281                 return -1;
1282         }
1283         sub->owner = newchan;
1284         ast_mutex_unlock(&sub->lock);
1285         return 0;
1286 }
1287
1288 static int mgcp_senddigit_begin(struct ast_channel *ast, char digit)
1289 {
1290         struct mgcp_subchannel *sub = ast->tech_pvt;
1291         struct mgcp_endpoint *p = sub->parent;
1292         int res = 0;
1293
1294         ast_mutex_lock(&sub->lock);
1295         if (p->dtmfmode & MGCP_DTMF_INBAND || p->dtmfmode & MGCP_DTMF_HYBRID) {
1296                 ast_debug(1, "Sending DTMF using inband/hybrid\n");
1297                 res = -1; /* Let asterisk play inband indications */
1298         } else if (p->dtmfmode & MGCP_DTMF_RFC2833) {
1299                 ast_debug(1, "Sending DTMF using RFC2833");
1300                 ast_rtp_instance_dtmf_begin(sub->rtp, digit);
1301         } else {
1302                 ast_log(LOG_ERROR, "Don't know about DTMF_MODE %d\n", p->dtmfmode);
1303         }
1304         ast_mutex_unlock(&sub->lock);
1305
1306         return res;
1307 }
1308
1309 static int mgcp_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration)
1310 {
1311         struct mgcp_subchannel *sub = ast->tech_pvt;
1312         struct mgcp_endpoint *p = sub->parent;
1313         int res = 0;
1314         char tmp[4];
1315
1316         ast_mutex_lock(&sub->lock);
1317         if (p->dtmfmode & MGCP_DTMF_INBAND || p->dtmfmode & MGCP_DTMF_HYBRID) {
1318                 ast_debug(1, "Stopping DTMF using inband/hybrid\n");
1319                 res = -1; /* Tell Asterisk to stop inband indications */
1320         } else if (p->dtmfmode & MGCP_DTMF_RFC2833) {
1321                 ast_debug(1, "Stopping DTMF using RFC2833\n");
1322                 if (sub->parent->ncs) {
1323                         tmp[0] = digit;
1324                         tmp[1] = '\0';
1325                 } else {
1326                         tmp[0] = 'D';
1327                         tmp[1] = '/';
1328                         tmp[2] = digit;
1329                         tmp[3] = '\0';
1330                 }
1331                 transmit_notify_request(sub, tmp);
1332                 ast_rtp_instance_dtmf_end(sub->rtp, digit);
1333         } else {
1334                 ast_log(LOG_ERROR, "Don't know about DTMF_MODE %d\n", p->dtmfmode);
1335         }
1336         ast_mutex_unlock(&sub->lock);
1337
1338         return res;
1339 }
1340
1341 /*!
1342  *  \brief  mgcp_devicestate: channel callback for device status monitoring
1343  *  \param  data tech/resource name of MGCP device to query
1344  *
1345  * Callback for device state management in channel subsystem
1346  * to obtain device status (up/down) of a specific MGCP endpoint
1347  *
1348  *  \return device status result (from devicestate.h) AST_DEVICE_INVALID (not available) or AST_DEVICE_UNKNOWN (available but unknown state)
1349  */
1350 static int mgcp_devicestate(void *data)
1351 {
1352         struct mgcp_gateway  *g;
1353         struct mgcp_endpoint *e = NULL;
1354         char *tmp, *endpt, *gw;
1355         int ret = AST_DEVICE_INVALID;
1356
1357         endpt = ast_strdupa(data);
1358         if ((tmp = strchr(endpt, '@'))) {
1359                 *tmp++ = '\0';
1360                 gw = tmp;
1361         } else
1362                 goto error;
1363
1364         ast_mutex_lock(&gatelock);
1365         for (g = gateways; g; g = g->next) {
1366                 if (strcasecmp(g->name, gw) == 0) {
1367                         e = g->endpoints;
1368                         break;
1369                 }
1370         }
1371
1372         if (!e)
1373                 goto error;
1374
1375         for (; e; e = e->next) {
1376                 if (strcasecmp(e->name, endpt) == 0) {
1377                         break;
1378                 }
1379         }
1380
1381         if (!e)
1382                 goto error;
1383
1384         /*
1385          * As long as the gateway/endpoint is valid, we'll
1386          * assume that the device is available and its state
1387          * can be tracked.
1388          */
1389         ret = AST_DEVICE_UNKNOWN;
1390
1391 error:
1392         ast_mutex_unlock(&gatelock);
1393         return ret;
1394 }
1395
1396 static char *control2str(int ind) {
1397         switch (ind) {
1398         case AST_CONTROL_HANGUP:
1399                 return "Other end has hungup";
1400         case AST_CONTROL_RING:
1401                 return "Local ring";
1402         case AST_CONTROL_RINGING:
1403                 return "Remote end is ringing";
1404         case AST_CONTROL_ANSWER:
1405                 return "Remote end has answered";
1406         case AST_CONTROL_BUSY:
1407                 return "Remote end is busy";
1408         case AST_CONTROL_TAKEOFFHOOK:
1409                 return "Make it go off hook";
1410         case AST_CONTROL_OFFHOOK:
1411                 return "Line is off hook";
1412         case AST_CONTROL_CONGESTION:
1413                 return "Congestion (circuits busy)";
1414         case AST_CONTROL_FLASH:
1415                 return "Flash hook";
1416         case AST_CONTROL_WINK:
1417                 return "Wink";
1418         case AST_CONTROL_OPTION:
1419                 return "Set a low-level option";
1420         case AST_CONTROL_RADIO_KEY:
1421                 return "Key Radio";
1422         case AST_CONTROL_RADIO_UNKEY:
1423                 return "Un-Key Radio";
1424         }
1425         return "UNKNOWN";
1426 }
1427
1428 static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen)
1429 {
1430         struct mgcp_subchannel *sub = ast->tech_pvt;
1431         int res = 0;
1432
1433         ast_debug(3, "MGCP asked to indicate %d '%s' condition on channel %s\n",
1434                 ind, control2str(ind), ast->name);
1435         ast_mutex_lock(&sub->lock);
1436         switch(ind) {
1437         case AST_CONTROL_RINGING:
1438 #ifdef DLINK_BUGGY_FIRMWARE     
1439                 transmit_notify_request(sub, "rt");
1440 #else
1441                 if (!sub->sdpsent) { /* will hide the inband progress!!! */
1442                         transmit_notify_request(sub, sub->parent->ncs ? "L/rt" : "G/rt");
1443                 }
1444 #endif
1445                 break;
1446         case AST_CONTROL_BUSY:
1447                 transmit_notify_request(sub, "L/bz");
1448                 break;
1449         case AST_CONTROL_CONGESTION:
1450                 transmit_notify_request(sub, sub->parent->ncs ? "L/cg" : "G/cg");
1451                 break;
1452         case AST_CONTROL_HOLD:
1453                 ast_moh_start(ast, data, NULL);
1454                 break;
1455         case AST_CONTROL_UNHOLD:
1456                 ast_moh_stop(ast);
1457                 break;
1458         case AST_CONTROL_SRCUPDATE:
1459                 ast_rtp_instance_update_source(sub->rtp);
1460                 break;
1461         case AST_CONTROL_SRCCHANGE:
1462                 ast_rtp_instance_change_source(sub->rtp);
1463                 break;
1464         case AST_CONTROL_PROGRESS:
1465         case AST_CONTROL_PROCEEDING:
1466                 transmit_modify_request(sub);
1467         case -1:
1468                 transmit_notify_request(sub, "");
1469                 break;
1470         default:
1471                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind);
1472                 res = -1;
1473         }
1474         ast_mutex_unlock(&sub->lock);
1475         return res;
1476 }
1477
1478 static struct ast_channel *mgcp_new(struct mgcp_subchannel *sub, int state, const char *linkedid)
1479 {
1480         struct ast_channel *tmp;
1481         struct ast_variable *v = NULL;
1482         struct mgcp_endpoint *i = sub->parent;
1483         int fmt;
1484
1485         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);
1486         if (tmp) {
1487                 tmp->tech = &mgcp_tech;
1488                 tmp->nativeformats = i->capability;
1489                 if (!tmp->nativeformats) {
1490                         tmp->nativeformats = capability;
1491                 }
1492                 fmt = ast_best_codec(tmp->nativeformats);
1493                 if (sub->rtp) {
1494                         ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(sub->rtp, 0));
1495                 }
1496                 if (i->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID)) {
1497                         i->dsp = ast_dsp_new();
1498                         ast_dsp_set_features(i->dsp, DSP_FEATURE_DIGIT_DETECT);
1499                         /* this is to prevent clipping of dtmf tones during dsp processing */
1500                         ast_dsp_set_digitmode(i->dsp, DSP_DIGITMODE_NOQUELCH);
1501                 } else {
1502                         i->dsp = NULL;
1503                 }
1504                 if (state == AST_STATE_RING)
1505                         tmp->rings = 1;
1506                 tmp->writeformat = fmt;
1507                 tmp->rawwriteformat = fmt;
1508                 tmp->readformat = fmt;
1509                 tmp->rawreadformat = fmt;
1510                 tmp->tech_pvt = sub;
1511                 if (!ast_strlen_zero(i->language))
1512                         ast_string_field_set(tmp, language, i->language);
1513                 if (!ast_strlen_zero(i->accountcode))
1514                         ast_string_field_set(tmp, accountcode, i->accountcode);
1515                 if (i->amaflags)
1516                         tmp->amaflags = i->amaflags;
1517                 sub->owner = tmp;
1518                 ast_module_ref(ast_module_info->self);
1519                 tmp->callgroup = i->callgroup;
1520                 tmp->pickupgroup = i->pickupgroup;
1521                 ast_string_field_set(tmp, call_forward, i->call_forward);
1522                 ast_copy_string(tmp->context, i->context, sizeof(tmp->context));
1523                 ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
1524
1525                 /* Don't use ast_set_callerid() here because it will
1526                  * generate a needless NewCallerID event */
1527                 tmp->cid.cid_ani = ast_strdup(i->cid_num);
1528
1529                 if (!i->adsi) {
1530                         tmp->adsicpe = AST_ADSI_UNAVAILABLE;
1531                 }
1532                 tmp->priority = 1;
1533
1534                 /* Set channel variables for this call from configuration */
1535                 for (v = i->chanvars ; v ; v = v->next) {
1536                         char valuebuf[1024];
1537                         pbx_builtin_setvar_helper(tmp, v->name, ast_get_encoded_str(v->value, valuebuf, sizeof(valuebuf)));
1538                 }
1539
1540                 if (sub->rtp) {
1541                         ast_jb_configure(tmp, &global_jbconf);
1542                 }
1543                 if (state != AST_STATE_DOWN) {
1544                         if (ast_pbx_start(tmp)) {
1545                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1546                                 ast_hangup(tmp);
1547                                 tmp = NULL;
1548                         }
1549                 }
1550                 ast_verb(3, "MGCP mgcp_new(%s) created in state: %s\n",
1551                                 tmp->name, ast_state2str(state));
1552         } else {
1553                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1554         }
1555         return tmp;
1556 }
1557
1558 static char *get_sdp_by_line(char* line, char *name, int nameLen)
1559 {
1560         if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
1561                 char *r = line + nameLen + 1;
1562                 while (*r && (*r < 33)) ++r;
1563                 return r;
1564         }
1565         return "";
1566 }
1567
1568 static char *get_sdp(struct mgcp_request *req, char *name)
1569 {
1570         int x;
1571         int len = strlen(name);
1572         char *r;
1573
1574         for (x = 0; x < req->lines; x++) {
1575                 r = get_sdp_by_line(req->line[x], name, len);
1576                 if (r[0] != '\0') return r;
1577         }
1578         return "";
1579 }
1580
1581 static void sdpLineNum_iterator_init(int *iterator)
1582 {
1583         *iterator = 0;
1584 }
1585
1586 static char *get_sdp_iterate(int* iterator, struct mgcp_request *req, char *name)
1587 {
1588         int len = strlen(name);
1589         char *r;
1590         while (*iterator < req->lines) {
1591                 r = get_sdp_by_line(req->line[(*iterator)++], name, len);
1592                 if (r[0] != '\0') return r;
1593         }
1594         return "";
1595 }
1596
1597 static char *__get_header(struct mgcp_request *req, char *name, int *start, char *def)
1598 {
1599         int x;
1600         int len = strlen(name);
1601         char *r;
1602         for (x = *start; x < req->headers; x++) {
1603                 if (!strncasecmp(req->header[x], name, len) &&
1604                     (req->header[x][len] == ':')) {
1605                         r = req->header[x] + len + 1;
1606                         while (*r && (*r < 33)) {
1607                                 r++;
1608                         }
1609                         *start = x + 1;
1610                         return r;
1611                 }
1612         }
1613         /* Don't return NULL, so get_header is always a valid pointer */
1614         return def;
1615 }
1616
1617 static char *get_header(struct mgcp_request *req, char *name)
1618 {
1619         int start = 0;
1620         return __get_header(req, name, &start, "");
1621 }
1622
1623 /*! \brief get_csv: (SC:) get comma separated value */
1624 static char *get_csv(char *c, int *len, char **next)
1625 {
1626         char *s;
1627
1628         *next = NULL, *len = 0;
1629         if (!c) return NULL;
1630
1631         while (*c && (*c < 33 || *c == ',')) {
1632                 c++;
1633         }
1634
1635         s = c;
1636         while (*c && (*c >= 33 && *c != ',')) {
1637                 c++, (*len)++;
1638         }
1639         *next = c;
1640
1641         if (*len == 0) {
1642                 s = NULL, *next = NULL;
1643         }
1644
1645         return s;
1646 }
1647
1648 static struct mgcp_gateway *find_realtime_gw(char *name, char *at, struct sockaddr_in *sin)
1649 {
1650         struct mgcp_gateway *g = NULL;
1651         struct ast_variable *mgcpgwconfig = NULL;
1652         struct ast_variable *gwv, *epname = NULL;
1653         struct mgcp_endpoint *e;
1654         char lines[256];
1655         int i, j;
1656
1657         ast_debug(1, "*** find Realtime MGCPGW\n");
1658
1659         if (!(i = ast_check_realtime("mgcpgw")) || !(j = ast_check_realtime("mgcpep"))) {
1660                 return NULL;
1661         }
1662
1663         if (ast_strlen_zero(at)) {
1664                 ast_debug(1, "null gw name\n");
1665                 return NULL;
1666         }
1667
1668         if (!(mgcpgwconfig = ast_load_realtime("mgcpgw", "name", at, NULL))) {
1669                 return NULL;
1670         }
1671
1672         /*!
1673          * \note This is a fairly odd way of instantiating lines.  Instead of each
1674          * line created by virtue of being in the database (and loaded via
1675          * ast_load_realtime_multientry), this code forces a specific order with a
1676          * "lines" entry in the "mgcpgw" record.  This has benefits, because as with
1677          * chan_dahdi, values are inherited across definitions.  The downside is
1678          * that it's not as clear what the values will be simply by looking at a
1679          * single row in the database, and it's probable that the sanest configuration
1680          * should have the first column in the "mgcpep" table be "clearvars", with a
1681          * static value of "all", if any variables are set at all.  It may be worth
1682          * making this assumption explicit in the code in the future, and then just
1683          * using ast_load_realtime_multientry for the "mgcpep" records.
1684          */
1685         lines[0] = '\0';
1686         for (gwv = mgcpgwconfig; gwv; gwv = gwv->next) {
1687                 if (!strcasecmp(gwv->name, "lines")) {
1688                         ast_copy_string(lines, gwv->value, sizeof(lines));
1689                         break;
1690                 }
1691         }
1692         /* Position gwv at the end of the list */
1693         for (gwv = gwv && gwv->next ? gwv : mgcpgwconfig; gwv->next; gwv = gwv->next);
1694
1695         if (!ast_strlen_zero(lines)) {
1696                 AST_DECLARE_APP_ARGS(args,
1697                         AST_APP_ARG(line)[100];
1698                 );
1699                 AST_STANDARD_APP_ARGS(args, lines);
1700                 for (i = 0; i < args.argc; i++) {
1701                         gwv->next = ast_load_realtime("mgcpep", "name", at, "line", args.line[i], NULL);
1702
1703                         /* Remove "line" AND position gwv at the end of the list. */
1704                         for (epname = NULL; gwv->next; gwv = gwv->next) {
1705                                 if (!strcasecmp(gwv->next->name, "line")) {
1706                                         /* Remove it from the list */
1707                                         epname = gwv->next;
1708                                         gwv->next = gwv->next->next;
1709                                 }
1710                         }
1711                         /* Since "line" instantiates the configuration, we have to move it to the end. */
1712                         if (epname) {
1713                                 gwv->next = epname;
1714                                 epname->next = NULL;
1715                                 gwv = gwv->next;
1716                         }
1717                 }
1718         }
1719         for (gwv = mgcpgwconfig; gwv; gwv = gwv->next) {
1720                 ast_debug(1, "MGCP Realtime var: %s => %s\n", gwv->name, gwv->value);
1721         }
1722
1723         if (mgcpgwconfig) {
1724                 g = build_gateway(at, mgcpgwconfig);
1725                 ast_variables_destroy(mgcpgwconfig);
1726         }
1727         if (g) {
1728                 g->next = gateways;
1729                 g->realtime = 1;
1730                 gateways = g;
1731                 for (e = g->endpoints; e; e = e->next) {
1732                         transmit_audit_endpoint(e);
1733                         e->needaudit = 0;
1734                 }
1735         }
1736         return g;
1737 }
1738
1739 static struct mgcp_subchannel *find_subchannel_and_lock(char *name, int msgid, struct sockaddr_in *sin)
1740 {
1741         struct mgcp_endpoint *p = NULL;
1742         struct mgcp_subchannel *sub = NULL;
1743         struct mgcp_gateway *g;
1744         char tmp[256] = "";
1745         char *at = NULL, *c;
1746         int found = 0;
1747         if (name) {
1748                 ast_copy_string(tmp, name, sizeof(tmp));
1749                 at = strchr(tmp, '@');
1750                 if (!at) {
1751                         ast_log(LOG_NOTICE, "Endpoint '%s' has no at sign!\n", name);
1752                         return NULL;
1753                 }
1754                 *at++ = '\0';
1755         }
1756         ast_mutex_lock(&gatelock);
1757         if (at && (at[0] == '[')) {
1758                 at++;
1759                 c = strrchr(at, ']');
1760                 if (c) {
1761                         *c = '\0';
1762                 }
1763         }
1764         for (g = gateways ? gateways : find_realtime_gw(name, at, sin); g; g = g->next ? g->next : find_realtime_gw(name, at, sin)) {
1765                 if ((!name || !strcasecmp(g->name, at)) &&
1766                     (sin || g->addr.sin_addr.s_addr || g->defaddr.sin_addr.s_addr)) {
1767                         /* Found the gateway.  If it's dynamic, save it's address -- now for the endpoint */
1768                         if (sin && g->dynamic && name) {
1769                                 if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) ||
1770                                         (g->addr.sin_port != sin->sin_port)) {
1771                                         memcpy(&g->addr, sin, sizeof(g->addr));
1772                                         if (ast_ouraddrfor(&g->addr.sin_addr, &g->ourip))
1773                                                 memcpy(&g->ourip, &__ourip, sizeof(g->ourip));
1774                                         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));
1775                                 }
1776                         /* not dynamic, check if the name matches */
1777                         } else if (name) {
1778                                 if (strcasecmp(g->name, at)) {
1779                                         g = g->next;
1780                                         continue;
1781                                 }
1782                         /* not dynamic, no name, check if the addr matches */
1783                         } else if (!name && sin) {
1784                                 if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) ||
1785                                     (g->addr.sin_port != sin->sin_port)) {
1786                                         if(!g->next)
1787                                                 g = find_realtime_gw(name, at, sin);
1788                                         else
1789                                                 g = g->next;
1790                                         continue;
1791                                 }
1792                         } else {
1793                                 continue;
1794                         }
1795                         for (p = g->endpoints; p; p = p->next) {
1796                                 ast_debug(1, "Searching on %s@%s for subchannel\n", p->name, g->name);
1797                                 if (msgid) {
1798                                         sub = p->sub;
1799                                         found = 1;
1800                                         break;
1801                                 } else if (name && !strcasecmp(p->name, tmp)) {
1802                                         ast_debug(1, "Coundn't determine subchannel, assuming current master %s@%s-%d\n",
1803                                                 p->name, g->name, p->sub->id);
1804                                         sub = p->sub;
1805                                         found = 1;
1806                                         break;
1807                                 }
1808                         }
1809                         if (sub && found) {
1810                                 ast_mutex_lock(&sub->lock);
1811                                 break;
1812                         }
1813                 }
1814         }
1815         ast_mutex_unlock(&gatelock);
1816         if (!sub) {
1817                 if (name) {
1818                         if (g) {
1819                                 ast_log(LOG_NOTICE, "Endpoint '%s' not found on gateway '%s'\n", tmp, at);
1820                         } else {
1821                                 ast_log(LOG_NOTICE, "Gateway '%s' (and thus its endpoint '%s') does not exist\n", at, tmp);
1822                         }
1823                 }
1824         }
1825         return sub;
1826 }
1827
1828 static void parse(struct mgcp_request *req)
1829 {
1830         /* Divide fields by NULL's */
1831         char *c;
1832         int f = 0;
1833         c = req->data;
1834
1835         /* First header starts immediately */
1836         req->header[f] = c;
1837         for (; *c; c++) {
1838                 if (*c == '\n') {
1839                         /* We've got a new header */
1840                         *c = 0;
1841                         ast_debug(3, "Header: %s (%d)\n", req->header[f], (int) strlen(req->header[f]));
1842                         if (ast_strlen_zero(req->header[f])) {
1843                                 /* Line by itself means we're now in content */
1844                                 c++;
1845                                 break;
1846                         }
1847                         if (f >= MGCP_MAX_HEADERS - 1) {
1848                                 ast_log(LOG_WARNING, "Too many MGCP headers...\n");
1849                         } else {
1850                                 f++;
1851                         }
1852                         req->header[f] = c + 1;
1853                 } else if (*c == '\r') {
1854                         /* Ignore but eliminate \r's */
1855                         *c = 0;
1856                 }
1857         }
1858         /* Check for last header */
1859         if (!ast_strlen_zero(req->header[f])) {
1860                 f++;
1861         }
1862         req->headers = f;
1863         /* Now we process any mime content */
1864         f = 0;
1865         req->line[f] = c;
1866         for (; *c; c++) {
1867                 if (*c == '\n') {
1868                         /* We've got a new line */
1869                         *c = 0;
1870                         ast_debug(3, "Line: %s (%d)\n", req->line[f], (int) strlen(req->line[f]));
1871                         if (f >= MGCP_MAX_LINES - 1) {
1872                                 ast_log(LOG_WARNING, "Too many SDP lines...\n");
1873                         } else {
1874                                 f++;
1875                         }
1876                         req->line[f] = c + 1;
1877                 } else if (*c == '\r') {
1878                         /* Ignore and eliminate \r's */
1879                         *c = 0;
1880                 }
1881         }
1882         /* Check for last line */
1883         if (!ast_strlen_zero(req->line[f])) {
1884                 f++;
1885         }
1886         req->lines = f;
1887         /* Parse up the initial header */
1888         c = req->header[0];
1889         while (*c && *c < 33) c++;
1890         /* First the verb */
1891         req->verb = c;
1892         while (*c && (*c > 32)) c++;
1893         if (*c) {
1894                 *c = '\0';
1895                 c++;
1896                 while (*c && (*c < 33)) c++;
1897                 req->identifier = c;
1898                 while (*c && (*c > 32)) c++;
1899                 if (*c) {
1900                         *c = '\0';
1901                         c++;
1902                         while (*c && (*c < 33)) c++;
1903                         req->endpoint = c;
1904                         while (*c && (*c > 32)) c++;
1905                         if (*c) {
1906                                 *c = '\0';
1907                                 c++;
1908                                 while (*c && (*c < 33)) c++;
1909                                 req->version = c;
1910                                 while (*c && (*c > 32)) c++;
1911                                 while (*c && (*c < 33)) c++;
1912                                 while (*c && (*c > 32)) c++;
1913                                 *c = '\0';
1914                         }
1915                 }
1916         }
1917
1918         ast_debug(1, "Verb: '%s', Identifier: '%s', Endpoint: '%s', Version: '%s'\n",
1919                         req->verb, req->identifier, req->endpoint, req->version);
1920         ast_debug(1, "%d headers, %d lines\n", req->headers, req->lines);
1921         if (*c) {
1922                 ast_log(LOG_WARNING, "Odd content, extra stuff left over ('%s')\n", c);
1923         }
1924 }
1925
1926 static int process_sdp(struct mgcp_subchannel *sub, struct mgcp_request *req)
1927 {
1928         char *m;
1929         char *c;
1930         char *a;
1931         char host[258];
1932         int len;
1933         int portno;
1934         format_t peercapability;
1935         int peerNonCodecCapability;
1936         struct sockaddr_in sin;
1937         char *codecs;
1938         struct ast_hostent ahp; struct hostent *hp;
1939         int codec, codec_count=0;
1940         int iterator;
1941         struct mgcp_endpoint *p = sub->parent;
1942         char tmp1[256], tmp2[256], tmp3[256];
1943
1944         /* Get codec and RTP info from SDP */
1945         m = get_sdp(req, "m");
1946         c = get_sdp(req, "c");
1947         if (ast_strlen_zero(m) || ast_strlen_zero(c)) {
1948                 ast_log(LOG_WARNING, "Insufficient information for SDP (m = '%s', c = '%s')\n", m, c);
1949                 return -1;
1950         }
1951         if (sscanf(c, "IN IP4 %256s", host) != 1) {
1952                 ast_log(LOG_WARNING, "Invalid host in c= line, '%s'\n", c);
1953                 return -1;
1954         }
1955         /* XXX This could block for a long time, and block the main thread! XXX */
1956         hp = ast_gethostbyname(host, &ahp);
1957         if (!hp) {
1958                 ast_log(LOG_WARNING, "Unable to lookup host in c= line, '%s'\n", c);
1959                 return -1;
1960         }
1961         if (sscanf(m, "audio %30d RTP/AVP %n", &portno, &len) != 1) {
1962                 ast_log(LOG_WARNING, "Unable to determine port number for RTP in '%s'\n", m);
1963                 return -1;
1964         }
1965         sin.sin_family = AF_INET;
1966         memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
1967         sin.sin_port = htons(portno);
1968         ast_rtp_instance_set_remote_address(sub->rtp, &sin);
1969         ast_debug(3, "Peer RTP is at port %s:%d\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
1970         /* Scan through the RTP payload types specified in a "m=" line: */
1971         ast_rtp_codecs_payloads_clear(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp);
1972         codecs = ast_strdupa(m + len);
1973         while (!ast_strlen_zero(codecs)) {
1974                 if (sscanf(codecs, "%30d%n", &codec, &len) != 1) {
1975                         if (codec_count) {
1976                                 break;
1977                         }
1978                         ast_log(LOG_WARNING, "Error in codec string '%s' at '%s'\n", m, codecs);
1979                         return -1;
1980                 }
1981                 ast_rtp_codecs_payloads_set_m_type(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, codec);
1982                 codec_count++;
1983                 codecs += len;
1984         }
1985
1986         /* Next, scan through each "a=rtpmap:" line, noting each */
1987         /* specified RTP payload type (with corresponding MIME subtype): */
1988         sdpLineNum_iterator_init(&iterator);
1989         while ((a = get_sdp_iterate(&iterator, req, "a"))[0] != '\0') {
1990                 char* mimeSubtype = ast_strdupa(a); /* ensures we have enough space */
1991                 if (sscanf(a, "rtpmap: %30u %127[^/]/", &codec, mimeSubtype) != 2)
1992                         continue;
1993                 /* Note: should really look at the 'freq' and '#chans' params too */
1994                 ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, codec, "audio", mimeSubtype, 0);
1995         }
1996
1997         /* Now gather all of the codecs that were asked for: */
1998         ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(sub->rtp), &peercapability, &peerNonCodecCapability);
1999         p->capability = capability & peercapability;
2000         ast_debug(1, "Capabilities: us - %s, them - %s, combined - %s\n",
2001                 ast_getformatname_multiple(tmp1, sizeof(tmp1), capability),
2002                 ast_getformatname_multiple(tmp2, sizeof(tmp2), peercapability),
2003                 ast_getformatname_multiple(tmp3, sizeof(tmp3), p->capability));
2004         ast_debug(1, "Non-codec capabilities: us - %d, them - %d, combined - %d\n",
2005                 nonCodecCapability, peerNonCodecCapability, p->nonCodecCapability);
2006         if (!p->capability) {
2007                 ast_log(LOG_WARNING, "No compatible codecs!\n");
2008                 return -1;
2009         }
2010         return 0;
2011 }
2012
2013 static int add_header(struct mgcp_request *req, const char *var, const char *value)
2014 {
2015         if (req->len >= sizeof(req->data) - 4) {
2016                 ast_log(LOG_WARNING, "Out of space, can't add anymore\n");
2017                 return -1;
2018         }
2019         if (req->lines) {
2020                 ast_log(LOG_WARNING, "Can't add more headers when lines have been added\n");
2021                 return -1;
2022         }
2023         req->header[req->headers] = req->data + req->len;
2024         snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s: %s\r\n", var, value);
2025         req->len += strlen(req->header[req->headers]);
2026         if (req->headers < MGCP_MAX_HEADERS) {
2027                 req->headers++;
2028         } else {
2029                 ast_log(LOG_WARNING, "Out of header space\n");
2030                 return -1;
2031         }
2032         return 0;
2033 }
2034
2035 static int add_line(struct mgcp_request *req, char *line)
2036 {
2037         if (req->len >= sizeof(req->data) - 4) {
2038                 ast_log(LOG_WARNING, "Out of space, can't add anymore\n");
2039                 return -1;
2040         }
2041         if (!req->lines) {
2042                 /* Add extra empty return */
2043                 ast_copy_string(req->data + req->len, "\r\n", sizeof(req->data) - req->len);
2044                 req->len += strlen(req->data + req->len);
2045         }
2046         req->line[req->lines] = req->data + req->len;
2047         snprintf(req->line[req->lines], sizeof(req->data) - req->len, "%s", line);
2048         req->len += strlen(req->line[req->lines]);
2049         if (req->lines < MGCP_MAX_LINES) {
2050                 req->lines++;
2051         } else {
2052                 ast_log(LOG_WARNING, "Out of line space\n");
2053                 return -1;
2054         }
2055         return 0;
2056 }
2057
2058 static int init_resp(struct mgcp_request *req, char *resp, struct mgcp_request *orig, char *resprest)
2059 {
2060         /* Initialize a response */
2061         if (req->headers || req->len) {
2062                 ast_log(LOG_WARNING, "Request already initialized?!?\n");
2063                 return -1;
2064         }
2065         req->header[req->headers] = req->data + req->len;
2066         snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %s %s\r\n", resp, orig->identifier, resprest);
2067         req->len += strlen(req->header[req->headers]);
2068         if (req->headers < MGCP_MAX_HEADERS) {
2069                 req->headers++;
2070         } else {
2071                 ast_log(LOG_WARNING, "Out of header space\n");
2072         }
2073         return 0;
2074 }
2075
2076 static int init_req(struct mgcp_endpoint *p, struct mgcp_request *req, char *verb)
2077 {
2078         /* Initialize a response */
2079         if (req->headers || req->len) {
2080                 ast_log(LOG_WARNING, "Request already initialized?!?\n");
2081                 return -1;
2082         }
2083         req->header[req->headers] = req->data + req->len;
2084         /* check if we need brackets around the gw name */
2085         if (p->parent->isnamedottedip) {
2086                 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" : "");
2087         } else {
2088 +               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" : "");
2089         }
2090         req->len += strlen(req->header[req->headers]);
2091         if (req->headers < MGCP_MAX_HEADERS) {
2092                 req->headers++;
2093         } else {
2094                 ast_log(LOG_WARNING, "Out of header space\n");
2095         }
2096         return 0;
2097 }
2098
2099
2100 static int respprep(struct mgcp_request *resp, struct mgcp_endpoint *p, char *msg, struct mgcp_request *req, char *msgrest)
2101 {
2102         memset(resp, 0, sizeof(*resp));
2103         init_resp(resp, msg, req, msgrest);
2104         return 0;
2105 }
2106
2107 static int reqprep(struct mgcp_request *req, struct mgcp_endpoint *p, char *verb)
2108 {
2109         memset(req, 0, sizeof(struct mgcp_request));
2110         oseq++;
2111         if (oseq > 999999999) {
2112                 oseq = 1;
2113         }
2114         init_req(p, req, verb);
2115         return 0;
2116 }
2117
2118 static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest)
2119 {
2120         struct mgcp_request resp;
2121         struct mgcp_endpoint *p = sub->parent;
2122         struct mgcp_response *mgr;
2123
2124         if (!sub) {
2125                 return -1;
2126         }
2127
2128         respprep(&resp, p, msg, req, msgrest);
2129         if (!(mgr = ast_calloc(1, sizeof(*mgr) + resp.len + 1))) {
2130                 return send_response(sub, &resp);
2131         }
2132         /* Store MGCP response in case we have to retransmit */
2133         sscanf(req->identifier, "%30d", &mgr->seqno);
2134         time(&mgr->whensent);
2135         mgr->len = resp.len;
2136         memcpy(mgr->buf, resp.data, resp.len);
2137         mgr->buf[resp.len] = '\0';
2138         mgr->next = p->parent->responses;
2139         p->parent->responses = mgr;
2140
2141         return send_response(sub, &resp);
2142 }
2143
2144
2145 static int add_sdp(struct mgcp_request *resp, struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
2146 {
2147         int len;
2148         int codec;
2149         char costr[80];
2150         struct sockaddr_in sin;
2151         char v[256];
2152         char s[256];
2153         char o[256];
2154         char c[256];
2155         char t[256];
2156         char m[256] = "";
2157         char a[1024] = "";
2158         format_t x;
2159         struct sockaddr_in dest = { 0, };
2160         struct mgcp_endpoint *p = sub->parent;
2161         /* XXX We break with the "recommendation" and send our IP, in order that our
2162                peer doesn't have to ast_gethostbyname() us XXX */
2163         len = 0;
2164         if (!sub->rtp) {
2165                 ast_log(LOG_WARNING, "No way to add SDP without an RTP structure\n");
2166                 return -1;
2167         }
2168         ast_rtp_instance_get_local_address(sub->rtp, &sin);
2169         if (rtp) {
2170                 ast_rtp_instance_get_remote_address(sub->rtp, &dest);
2171         } else {
2172                 if (sub->tmpdest.sin_addr.s_addr) {
2173                         dest.sin_addr = sub->tmpdest.sin_addr;
2174                         dest.sin_port = sub->tmpdest.sin_port;
2175                         /* Reset temporary destination */
2176                         memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
2177                 } else {
2178                         dest.sin_addr = p->parent->ourip;
2179                         dest.sin_port = sin.sin_port;
2180                 }
2181         }
2182         ast_debug(1, "We're at %s port %d\n", ast_inet_ntoa(p->parent->ourip), ntohs(sin.sin_port));
2183         ast_copy_string(v, "v=0\r\n", sizeof(v));
2184         snprintf(o, sizeof(o), "o=root %d %d IN IP4 %s\r\n", (int)getpid(), (int)getpid(), ast_inet_ntoa(dest.sin_addr));
2185         ast_copy_string(s, "s=session\r\n", sizeof(s));
2186         snprintf(c, sizeof(c), "c=IN IP4 %s\r\n", ast_inet_ntoa(dest.sin_addr));
2187         ast_copy_string(t, "t=0 0\r\n", sizeof(t));
2188         snprintf(m, sizeof(m), "m=audio %d RTP/AVP", ntohs(dest.sin_port));
2189         for (x = 1LL; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2190                 if (!(x & AST_FORMAT_AUDIO_MASK)) {
2191                         /* Audio is now discontiguous */
2192                         continue;
2193                 }
2194                 if (p->capability & x) {
2195                         ast_debug(1, "Answering with capability %s\n", ast_getformatname(x));
2196                         codec = ast_rtp_codecs_payload_code(ast_rtp_instance_get_codecs(sub->rtp), 1, x);
2197                         if (codec > -1) {
2198                                 snprintf(costr, sizeof(costr), " %d", codec);
2199                                 strncat(m, costr, sizeof(m) - strlen(m) - 1);
2200                                 snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype2(1, x, 0));
2201                                 strncat(a, costr, sizeof(a) - strlen(a) - 1);
2202                         }
2203                 }
2204         }
2205         for (x = 1LL; x <= AST_RTP_MAX; x <<= 1) {
2206                 if (p->nonCodecCapability & x) {
2207                         ast_debug(1, "Answering with non-codec capability %d\n", (int) x);
2208                         codec = ast_rtp_codecs_payload_code(ast_rtp_instance_get_codecs(sub->rtp), 0, x);
2209                         if (codec > -1) {
2210                                 snprintf(costr, sizeof(costr), " %d", codec);
2211                                 strncat(m, costr, sizeof(m) - strlen(m) - 1);
2212                                 snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype2(0, x, 0));
2213                                 strncat(a, costr, sizeof(a) - strlen(a) - 1);
2214                                 if (x == AST_RTP_DTMF) {
2215                                         /* Indicate we support DTMF...  Not sure about 16,
2216                                            but MSN supports it so dang it, we will too... */
2217                                         snprintf(costr, sizeof costr, "a=fmtp:%d 0-16\r\n", codec);
2218                                         strncat(a, costr, sizeof(a) - strlen(a) - 1);
2219                                 }
2220                         }
2221                 }
2222         }
2223         strncat(m, "\r\n", sizeof(m) - strlen(m) - 1);
2224         len = strlen(v) + strlen(s) + strlen(o) + strlen(c) + strlen(t) + strlen(m) + strlen(a);
2225         snprintf(costr, sizeof(costr), "%d", len);
2226         add_line(resp, v);
2227         add_line(resp, o);
2228         add_line(resp, s);
2229         add_line(resp, c);
2230         add_line(resp, t);
2231         add_line(resp, m);
2232         add_line(resp, a);
2233         return 0;
2234 }
2235
2236 static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp, format_t codecs)
2237 {
2238         struct mgcp_request resp;
2239         char local[256];
2240         char tmp[80];
2241         struct mgcp_endpoint *p = sub->parent;
2242         format_t x;
2243
2244         if (ast_strlen_zero(sub->cxident) && rtp) {
2245                 /* We don't have a CXident yet, store the destination and
2246                    wait a bit */
2247                 ast_rtp_instance_get_remote_address(rtp, &sub->tmpdest);
2248                 return 0;
2249         }
2250         ast_copy_string(local, "e:on, s:off, p:20", sizeof(local));
2251         for (x = 1; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2252                 if (!(x & AST_FORMAT_AUDIO_MASK)) {
2253                         /* No longer contiguous */
2254                         continue;
2255                 }
2256                 if (p->capability & x) {
2257                         snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2258                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2259                 }
2260         }
2261
2262         if (sub->gate) {
2263                 if (sub->gate->state == GATE_ALLOCATED || sub->gate->state == GATE_OPEN) {
2264                         snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
2265                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2266                         sub->sdpsent = 1;
2267                 } else {
2268                         /* oops wait */
2269                         ast_debug(1, "Waiting for opened gate...\n");
2270                         sub->sdpsent = 0;
2271                         return 0;
2272                 }
2273         }
2274
2275
2276         reqprep(&resp, p, "MDCX");
2277         add_header(&resp, "C", sub->callid);
2278         add_header(&resp, "L", local);
2279         add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
2280         /* X header should not be sent. kept for compatibility */
2281         add_header(&resp, "X", sub->txident);
2282         add_header(&resp, "I", sub->cxident);
2283         /*add_header(&resp, "S", "");*/
2284         add_sdp(&resp, sub, rtp);
2285         /* fill in new fields */
2286         resp.cmd = MGCP_CMD_MDCX;
2287         resp.trid = oseq;
2288         return send_request(p, sub, &resp, oseq);
2289 }
2290
2291 static int transmit_connect_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
2292 {
2293         struct mgcp_request resp;
2294         char local[256];
2295         char tmp[80];
2296         int x;
2297         struct mgcp_endpoint *p = sub->parent;
2298
2299         ast_debug(3, "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n",
2300                  p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2301
2302         ast_copy_string(local, "e:on, s:off, p:20", sizeof(local));
2303
2304         for (x = 1; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2305                 if (!(x & AST_FORMAT_AUDIO_MASK)) {
2306                         /* No longer contiguous */
2307                         continue;
2308                 }
2309                 if (p->capability & x) {
2310                         snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2311                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2312                 }
2313         }
2314
2315         if (sub->gate) {
2316                 if(sub->gate->state == GATE_ALLOCATED) {
2317                         snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
2318                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2319                 }
2320         }
2321         sub->sdpsent = 1;
2322         reqprep(&resp, p, "CRCX");
2323         add_header(&resp, "C", sub->callid);
2324         add_header(&resp, "L", local);
2325         add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
2326         /* X header should not be sent. kept for compatibility */
2327         add_header(&resp, "X", sub->txident);
2328         /*add_header(&resp, "S", "");*/
2329         add_sdp(&resp, sub, rtp);
2330         /* fill in new fields */
2331         resp.cmd = MGCP_CMD_CRCX;
2332         resp.trid = oseq;
2333         return send_request(p, sub, &resp, oseq);
2334 }
2335
2336 static int mgcp_pktcgate_remove(struct cops_gate *gate)
2337 {
2338         struct mgcp_subchannel *sub = gate->tech_pvt;
2339
2340         if (!sub) {
2341                 return 1;
2342         }
2343
2344         ast_mutex_lock(&sub->lock);
2345         ast_debug(1, "Pktc: gate 0x%x deleted\n", gate->gateid);
2346         if (sub->gate->state != GATE_CLOSED && sub->parent->hangupongateremove) {
2347                 sub->gate = NULL;
2348                 if (sub->owner) {
2349                         ast_softhangup(sub->owner, AST_CAUSE_REQUESTED_CHAN_UNAVAIL);
2350                         ast_channel_unlock(sub->owner);
2351                 }
2352         } else {
2353                 sub->gate = NULL;
2354         }
2355         ast_mutex_unlock(&sub->lock);
2356         return 1;
2357 }
2358
2359 static int mgcp_pktcgate_open(struct cops_gate *gate)
2360 {
2361         struct mgcp_subchannel *sub = gate->tech_pvt;
2362         if (!sub) {
2363                 return 1;
2364         }
2365         ast_mutex_lock(&sub->lock);
2366         ast_debug(1, "Pktc: gate 0x%x open\n", gate->gateid);
2367         if (!sub->sdpsent) transmit_modify_with_sdp(sub, NULL, 0);
2368         ast_mutex_unlock(&sub->lock);
2369         return 1;
2370 }
2371
2372 static int mgcp_alloc_pktcgate(struct mgcp_subchannel *sub)
2373 {
2374         struct mgcp_endpoint *p = sub->parent;
2375         sub->gate = ast_pktccops_gate_alloc(GATE_SET, NULL, ntohl(p->parent->addr.sin_addr.s_addr),
2376                                         8, 128000, 232, 0, 0, NULL, &mgcp_pktcgate_remove);
2377
2378         if (!sub->gate) {
2379                 return 0;
2380         }
2381         sub->gate->tech_pvt = sub;
2382         sub->gate->gate_open = &mgcp_pktcgate_open;
2383         return 1;
2384 }
2385
2386 static int transmit_connect(struct mgcp_subchannel *sub)
2387 {
2388         struct mgcp_request resp;
2389         char local[256];
2390         char tmp[80];
2391         format_t x;
2392         struct mgcp_endpoint *p = sub->parent;
2393
2394         ast_copy_string(local, "p:20, s:off, e:on", sizeof(local));
2395
2396         for (x = 1LL; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2397                 if (p->capability & x) {
2398                         snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2399                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2400                 }
2401         }
2402
2403         ast_debug(3, "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n",
2404                     p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2405         sub->sdpsent = 0;
2406         reqprep(&resp, p, "CRCX");
2407         add_header(&resp, "C", sub->callid);
2408         add_header(&resp, "L", local);
2409         add_header(&resp, "M", "inactive");
2410         /* X header should not be sent. kept for compatibility */
2411         add_header(&resp, "X", sub->txident);
2412         /*add_header(&resp, "S", "");*/
2413         /* fill in new fields */
2414         resp.cmd = MGCP_CMD_CRCX;
2415         resp.trid = oseq;
2416         return send_request(p, sub, &resp, oseq);
2417 }
2418
2419 static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone)
2420 {
2421         struct mgcp_request resp;
2422         struct mgcp_endpoint *p = sub->parent;
2423
2424         ast_debug(3, "MGCP Asked to indicate tone: %s on  %s@%s-%d in cxmode: %s\n",
2425                 tone, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]);
2426         ast_copy_string(p->curtone, tone, sizeof(p->curtone));
2427         reqprep(&resp, p, "RQNT");
2428         add_header(&resp, "X", p->rqnt_ident);
2429         switch (p->hookstate) {
2430         case MGCP_ONHOOK:
2431                 add_header(&resp, "R", "L/hd(N)");
2432                 break;
2433         case MGCP_OFFHOOK:
2434                 add_header_offhook(sub, &resp, tone);
2435                 break;
2436         }
2437         if (!ast_strlen_zero(tone)) {
2438                 add_header(&resp, "S", tone);
2439         }
2440         /* fill in new fields */
2441         resp.cmd = MGCP_CMD_RQNT;
2442         resp.trid = oseq;
2443         return send_request(p, NULL, &resp, oseq);
2444 }
2445
2446 static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername)
2447 {
2448         struct mgcp_request resp;
2449         char tone2[256];
2450         char *l, *n;
2451         struct timeval t = ast_tvnow();
2452         struct ast_tm tm;
2453         struct mgcp_endpoint *p = sub->parent;
2454
2455         ast_localtime(&t, &tm, NULL);
2456         n = callername;
2457         l = callernum;
2458         if (!n)
2459                 n = "";
2460         if (!l)
2461                 l = "";
2462
2463         /* Keep track of last callerid for blacklist and callreturn */
2464         ast_copy_string(p->lastcallerid, l, sizeof(p->lastcallerid));
2465
2466         snprintf(tone2, sizeof(tone2), "%s,L/ci(%02d/%02d/%02d/%02d,%s,%s)", tone,
2467                 tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, l, n);
2468         ast_copy_string(p->curtone, tone, sizeof(p->curtone));
2469         reqprep(&resp, p, "RQNT");
2470         add_header(&resp, "X", p->rqnt_ident);
2471         switch (p->hookstate) {
2472         case MGCP_ONHOOK:
2473                 add_header(&resp, "R", "L/hd(N)");
2474                 break;
2475         case MGCP_OFFHOOK:
2476                 add_header_offhook(sub, &resp, tone);
2477                 break;
2478         }
2479         if (!ast_strlen_zero(tone2)) {
2480                 add_header(&resp, "S", tone2);
2481         }
2482         ast_debug(3, "MGCP Asked to indicate tone: %s on  %s@%s-%d in cxmode: %s\n",
2483                 tone2, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]);
2484         /* fill in new fields */
2485         resp.cmd = MGCP_CMD_RQNT;
2486         resp.trid = oseq;
2487         return send_request(p, NULL, &resp, oseq);
2488 }
2489
2490 static int transmit_modify_request(struct mgcp_subchannel *sub)
2491 {
2492         struct mgcp_request resp;
2493         struct mgcp_endpoint *p = sub->parent;
2494         format_t x;
2495         int fc = 1;
2496         char local[256];
2497         char tmp[80];
2498
2499         if (ast_strlen_zero(sub->cxident)) {
2500                 /* We don't have a CXident yet, store the destination and
2501                    wait a bit */
2502                 return 0;
2503         }
2504         ast_debug(3, "Modified %s@%s-%d with new mode: %s on callid: %s\n",
2505                 p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2506
2507         ast_copy_string(local, "", sizeof(local));
2508         for (x = 1; x <= AST_FORMAT_AUDIO_MASK; x <<= 1) {
2509                 if (p->capability & x) {
2510                         if (p->ncs && !fc) {
2511                                 p->capability = x; /* sb5120e bug */
2512                                 break;
2513                         } else {
2514                                 fc = 0;
2515                                 snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, x, 0));
2516                         }
2517                         strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2518                 }
2519         }
2520
2521         if (!sub->sdpsent) {
2522                 if (sub->gate) {
2523                         if (sub->gate->state == GATE_ALLOCATED || sub->gate->state == GATE_OPEN) {
2524                                 snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
2525                                 strncat(local, tmp, sizeof(local) - strlen(local) - 1);
2526                         } else {
2527                                         /* we still dont have gateid wait */
2528                                 return 0;
2529                         }
2530                 }
2531         }
2532
2533         reqprep(&resp, p, "MDCX");
2534         add_header(&resp, "C", sub->callid);
2535         if (!sub->sdpsent) {
2536                 add_header(&resp, "L", local);
2537         }
2538         add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
2539         /* X header should not be sent. kept for compatibility */
2540         add_header(&resp, "X", sub->txident);
2541         add_header(&resp, "I", sub->cxident);
2542         switch (sub->parent->hookstate) {
2543         case MGCP_ONHOOK:
2544                 add_header(&resp, "R", "L/hd(N)");
2545                 break;
2546         case MGCP_OFFHOOK:
2547                 add_header_offhook(sub, &resp, "");
2548                 break;
2549         }
2550         if (!sub->sdpsent) {
2551                 add_sdp(&resp, sub, NULL);
2552                 sub->sdpsent = 1;
2553         }
2554         /* fill in new fields */
2555         resp.cmd = MGCP_CMD_MDCX;
2556         resp.trid = oseq;
2557         return send_request(p, sub, &resp, oseq);
2558 }
2559
2560
2561 static void add_header_offhook(struct mgcp_subchannel *sub, struct mgcp_request *resp, char *tone)
2562 {
2563         struct mgcp_endpoint *p = sub->parent;
2564         char tone_indicate_end = 0;
2565
2566         /* We also should check the tone to indicate, because it have no sense
2567            to request notify D/[0-9#*] (dtmf keys) if we are sending congestion
2568            tone for example G/cg */
2569         if (p && (!strcasecmp(tone, (p->ncs ? "L/ro" : "G/cg")))) {
2570                 tone_indicate_end = 1;
2571         }
2572
2573         if (p && p->sub && p->sub->owner &&
2574                         p->sub->owner->_state >= AST_STATE_RINGING &&
2575                         (p->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID))) {
2576             add_header(resp, "R", "L/hu(N),L/hf(N)");
2577
2578         } else if (!tone_indicate_end){
2579             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)"));
2580         } else {
2581                 ast_debug(1, "We don't want more digits if we will end the call\n");
2582                 add_header(resp, "R", "L/hu(N),L/hf(N)");
2583         }
2584 }
2585
2586
2587
2588
2589 static int transmit_audit_endpoint(struct mgcp_endpoint *p)
2590 {
2591         struct mgcp_request resp;
2592         reqprep(&resp, p, "AUEP");
2593         /* removed unknown param VS */
2594         /*add_header(&resp, "F", "A,R,D,S,X,N,I,T,O,ES,E,MD,M");*/
2595         add_header(&resp, "F", "A");
2596         /* fill in new fields */
2597         resp.cmd = MGCP_CMD_AUEP;
2598         resp.trid = oseq;
2599         return send_request(p, NULL, &resp, oseq);
2600 }
2601
2602 static int transmit_connection_del(struct mgcp_subchannel *sub)
2603 {
2604         struct mgcp_endpoint *p = sub->parent;
2605         struct mgcp_request resp;
2606
2607         ast_debug(3, "Delete connection %s %s@%s-%d with new mode: %s on callid: %s\n",
2608                 sub->cxident, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
2609         reqprep(&resp, p, "DLCX");
2610         /* check if call id is avail */
2611         if (sub->callid[0])
2612                 add_header(&resp, "C", sub->callid);
2613         /* X header should not be sent. kept for compatibility */
2614         add_header(&resp, "X", sub->txident);
2615         /* check if cxident is avail */
2616         if (sub->cxident[0])
2617                 add_header(&resp, "I", sub->cxident);
2618         /* fill in new fields */
2619         resp.cmd = MGCP_CMD_DLCX;
2620         resp.trid = oseq;
2621         return send_request(p, sub, &resp, oseq);
2622 }
2623
2624 static int transmit_connection_del_w_params(struct mgcp_endpoint *p, char *callid, char *cxident)
2625 {
2626         struct mgcp_request resp;
2627
2628         ast_debug(3, "Delete connection %s %s@%s on callid: %s\n",
2629                 cxident ? cxident : "", p->name, p->parent->name, callid ? callid : "");
2630         reqprep(&resp, p, "DLCX");
2631         /* check if call id is avail */
2632         if (callid && *callid)
2633                 add_header(&resp, "C", callid);
2634         /* check if cxident is avail */
2635         if (cxident && *cxident)
2636                 add_header(&resp, "I", cxident);
2637         /* fill in new fields */
2638         resp.cmd = MGCP_CMD_DLCX;
2639         resp.trid = oseq;
2640         return send_request(p, p->sub, &resp, oseq);
2641 }
2642
2643 /*! \brief  dump_cmd_queues: (SC:) cleanup pending commands */
2644 static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *sub)
2645 {
2646         struct mgcp_request *t, *q;
2647
2648         if (p) {
2649                 ast_mutex_lock(&p->rqnt_queue_lock);
2650                 for (q = p->rqnt_queue; q; t = q->next, ast_free(q), q=t);
2651                 p->rqnt_queue = NULL;
2652                 ast_mutex_unlock(&p->rqnt_queue_lock);
2653
2654                 ast_mutex_lock(&p->cmd_queue_lock);
2655                 for (q = p->cmd_queue; q; t = q->next, ast_free(q), q=t);
2656                 p->cmd_queue = NULL;
2657                 ast_mutex_unlock(&p->cmd_queue_lock);
2658
2659                 ast_mutex_lock(&p->sub->cx_queue_lock);
2660                 for (q = p->sub->cx_queue; q; t = q->next, ast_free(q), q=t);
2661                 p->sub->cx_queue = NULL;
2662                 ast_mutex_unlock(&p->sub->cx_queue_lock);
2663
2664                 ast_mutex_lock(&p->sub->next->cx_queue_lock);
2665                 for (q = p->sub->next->cx_queue; q; t = q->next, ast_free(q), q=t);
2666                 p->sub->next->cx_queue = NULL;
2667                 ast_mutex_unlock(&p->sub->next->cx_queue_lock);
2668         } else if (sub) {
2669                 ast_mutex_lock(&sub->cx_queue_lock);
2670                 for (q = sub->cx_queue; q; t = q->next, ast_free(q), q=t);
2671                 sub->cx_queue = NULL;
2672                 ast_mutex_unlock(&sub->cx_queue_lock);
2673         }
2674 }
2675
2676
2677 /*! \brief  find_command: (SC:) remove command transaction from queue */
2678 static struct mgcp_request *find_command(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
2679                 struct mgcp_request **queue, ast_mutex_t *l, int ident)
2680 {
2681         struct mgcp_request *prev, *req;
2682
2683         ast_mutex_lock(l);
2684         for (prev = NULL, req = *queue; req; prev = req, req = req->next) {
2685                 if (req->trid == ident) {
2686                         /* remove from queue */
2687                         if (!prev)
2688                                 *queue = req->next;
2689                         else
2690                                 prev->next = req->next;
2691
2692                         /* send next pending command */
2693                         if (*queue) {
2694                                 ast_debug(1, "Posting Queued Request:\n%s to %s:%d\n", (*queue)->data,
2695                                         ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
2696
2697                                 mgcp_postrequest(p, sub, (*queue)->data, (*queue)->len, (*queue)->trid);
2698                         }
2699                         break;
2700                 }
2701         }
2702         ast_mutex_unlock(l);
2703         return req;
2704 }
2705
2706 /* modified for new transport mechanism */
2707 static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
2708                 int result, unsigned int ident, struct mgcp_request *resp)
2709 {
2710         char *c;
2711         struct mgcp_request *req;
2712         struct mgcp_gateway *gw = p->parent;
2713
2714         if (result < 200) {
2715                 /* provisional response */
2716                 return;
2717         }
2718
2719         if (p->slowsequence)
2720                 req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident);
2721         else if (sub)
2722                 req = find_command(p, sub, &sub->cx_queue, &sub->cx_queue_lock, ident);
2723         else if (!(req = find_command(p, sub, &p->rqnt_queue, &p->rqnt_queue_lock, ident)))
2724                 req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident);
2725
2726         if (!req) {
2727                 ast_verb(3, "No command found on [%s] for transaction %d. Ignoring...\n",
2728                                 gw->name, ident);
2729                 return;
2730         }
2731
2732         if (p && (result >= 400) && (result <= 599)) {
2733                 switch (result) {
2734                 case 401:
2735                         p->hookstate = MGCP_OFFHOOK;
2736                         break;
2737                 case 402:
2738                         p->hookstate = MGCP_ONHOOK;
2739                         break;
2740                 case 406:
2741                         ast_log(LOG_NOTICE, "Transaction %d timed out\n", ident);
2742                         break;
2743                 case 407:
2744                         ast_log(LOG_NOTICE, "Transaction %d aborted\n", ident);
2745                         break;
2746                 }
2747                 if (sub) {
2748                         if (!sub->cxident[0] && (req->cmd == MGCP_CMD_CRCX)) {
2749                             ast_log(LOG_NOTICE, "DLCX for all connections on %s due to error %d\n", gw->name, result);
2750                             transmit_connection_del(sub);
2751                         }
2752                         if (sub->owner) {
2753                                 ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
2754                                         result, p->name, p->parent->name, sub ? sub->id:-1);
2755                                 mgcp_queue_hangup(sub);
2756                         }
2757                 } else {
2758                         if (p->sub->next->owner) {
2759                                 ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
2760                                         result, p->name, p->parent->name, sub ? sub->id:-1);
2761                                 mgcp_queue_hangup(p->sub);
2762                         }
2763
2764                         if (p->sub->owner) {
2765                                 ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
2766                                         result, p->name, p->parent->name, sub ? sub->id:-1);
2767                                 mgcp_queue_hangup(p->sub);
2768                         }
2769
2770                         dump_cmd_queues(p, NULL);
2771                 }
2772         }
2773
2774         if (resp) {
2775                 /* responseAck: */
2776                 if (result == 200 && (req->cmd == MGCP_CMD_CRCX || req->cmd == MGCP_CMD_MDCX)) {
2777                                 if (sub) {
2778                                         transmit_response(sub, "000", resp, "OK");
2779                                         if (sub->owner && sub->owner->_state == AST_STATE_RINGING) {
2780                                                 ast_queue_control(sub->owner, AST_CONTROL_RINGING);
2781                                         }
2782                                 }
2783                 }
2784                 if (req->cmd == MGCP_CMD_CRCX) {
2785                         if ((c = get_header(resp, "I"))) {
2786                                 if (!ast_strlen_zero(c) && sub) {
2787                                         /* if we are hanging up do not process this conn. */
2788                                         if (sub->owner) {
2789                                                 if (!ast_strlen_zero(sub->cxident)) {
2790                                                         if (strcasecmp(c, sub->cxident)) {
2791                                                                 ast_log(LOG_WARNING, "Subchannel already has a cxident. sub->cxident: %s requested %s\n", sub->cxident, c);
2792                                                         }
2793                                                 }
2794                                                 ast_copy_string(sub->cxident, c, sizeof(sub->cxident));
2795                                                 if (sub->tmpdest.sin_addr.s_addr) {
2796                                                         transmit_modify_with_sdp(sub, NULL, 0);
2797                                                 }
2798                                         } else {
2799                                                 /* XXX delete this one
2800                                                    callid and conn id may already be lost.
2801                                                    so the following del conn may have a side effect of
2802                                                    cleaning up the next subchannel */
2803                                                 transmit_connection_del(sub);
2804                                         }
2805                                 }
2806                         }
2807                 }
2808
2809                 if (req->cmd == MGCP_CMD_AUEP) {
2810                         /* check stale connection ids */
2811                         if ((c = get_header(resp, "I"))) {
2812                                 char *v, *n;
2813                                 int len;
2814                                 while ((v = get_csv(c, &len, &n))) {
2815                                         if (len) {
2816                                                 if (strncasecmp(v, p->sub->cxident, len) &&
2817                                                     strncasecmp(v, p->sub->next->cxident, len)) {
2818                                                         /* connection id not found. delete it */
2819                                                         char cxident[80] = "";
2820
2821                                                         if (len > (sizeof(cxident) - 1))
2822                                                                 len = sizeof(cxident) - 1;
2823                                                         ast_copy_string(cxident, v, len);
2824                                                         ast_verb(3, "Non existing connection id %s on %s@%s \n",
2825                                                                             cxident, p->name, gw->name);
2826                                                         transmit_connection_del_w_params(p, NULL, cxident);
2827                                                 }
2828                                         }
2829                                         c = n;
2830                                 }
2831                         }
2832
2833                         /* Try to determine the hookstate returned from an audit endpoint command */
2834                         if ((c = get_header(resp, "ES"))) {
2835                                 if (!ast_strlen_zero(c)) {
2836                                         if (strstr(c, "hu")) {
2837                                                 if (p->hookstate != MGCP_ONHOOK) {
2838                                                         /* XXX cleanup if we think we are offhook XXX */
2839                                                         if ((p->sub->owner || p->sub->next->owner ) &&
2840                                                             p->hookstate == MGCP_OFFHOOK)
2841                                                                 mgcp_queue_hangup(sub);
2842                                                         p->hookstate = MGCP_ONHOOK;
2843
2844                                                         /* update the requested events according to the new hookstate */
2845                                                         transmit_notify_request(p->sub, "");
2846
2847                                                         ast_verb(3, "Setting hookstate of %s@%s to ONHOOK\n", p->name, gw->name);
2848                                                         }
2849                                         } else if (strstr(c, "hd")) {
2850                                                 if (p->hookstate != MGCP_OFFHOOK) {
2851                                                         p->hookstate = MGCP_OFFHOOK;
2852
2853                                                         /* update the requested events according to the new hookstate */
2854                                                         transmit_notify_request(p->sub, "");
2855
2856                                                         ast_verb(3, "Setting hookstate of %s@%s to OFFHOOK\n", p->name, gw->name);
2857                                                         }
2858                                                 }
2859                                         }
2860                                 }
2861                         }
2862
2863                 if (resp && resp->lines) {
2864                         /* do not process sdp if we are hanging up. this may be a late response */
2865                         if (sub && sub->owner) {
2866                                 if (!sub->rtp)
2867                                         start_rtp(sub);
2868                                 if (sub->rtp)
2869                                         process_sdp(sub, resp);
2870                         }
2871                 }
2872         }
2873
2874         ast_free(req);
2875 }
2876
2877 static void start_rtp(struct mgcp_subchannel *sub)
2878 {
2879         ast_mutex_lock(&sub->lock);
2880         /* check again to be on the safe side */
2881         if (sub->rtp) {
2882                 ast_rtp_instance_destroy(sub->rtp);
2883                 sub->rtp = NULL;
2884         }
2885         /* Allocate the RTP now */
2886         sub->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr, NULL);
2887         if (sub->rtp && sub->owner)
2888                 ast_channel_set_fd(sub->owner, 0, ast_rtp_instance_fd(sub->rtp, 0));
2889         if (sub->rtp) {
2890                 ast_rtp_instance_set_qos(sub->rtp, qos.tos_audio, qos.cos_audio, "MGCP RTP");
2891                 ast_rtp_instance_set_prop(sub->rtp, AST_RTP_PROPERTY_NAT, sub->nat);
2892         }
2893         /* Make a call*ID */
2894         snprintf(sub->callid, sizeof(sub->callid), "%08lx%s", ast_random(), sub->txident);
2895         /* Transmit the connection create */
2896         if(!sub->parent->pktcgatealloc) {
2897                 transmit_connect_with_sdp(sub, NULL);
2898         } else {
2899                 transmit_connect(sub);
2900                 sub->gate = NULL;
2901                 if(!mgcp_alloc_pktcgate(sub))
2902                         mgcp_queue_hangup(sub);
2903         }
2904         ast_mutex_unlock(&sub->lock);
2905 }
2906
2907 static void *mgcp_ss(void *data)
2908 {
2909         struct ast_channel *chan = data;
2910         struct mgcp_subchannel *sub = chan->tech_pvt;
2911         struct mgcp_endpoint *p = sub->parent;
2912         /* char exten[AST_MAX_EXTENSION] = ""; */
2913         int len = 0;
2914         int timeout = firstdigittimeout;
2915         int res= 0;
2916         int getforward = 0;
2917         int loop_pause = 100;
2918
2919         len = strlen(p->dtmf_buf);
2920
2921         while (len < AST_MAX_EXTENSION - 1) {
2922                 ast_debug(1, "Dtmf buffer '%s' for '%s@%s'\n", p->dtmf_buf, p->name, p->parent->name);
2923                 res = 1;  /* Assume that we will get a digit */
2924                 while (strlen(p->dtmf_buf) == len) {
2925                         ast_safe_sleep(chan, loop_pause);
2926                         timeout -= loop_pause;
2927                         if (timeout <= 0){
2928                                 res = 0;
2929                                 break;
2930                         }
2931                         res = 1;
2932                 }
2933
2934                 timeout = 0;
2935                 len = strlen(p->dtmf_buf);
2936
2937                 if (!ast_ignore_pattern(chan->context, p->dtmf_buf)) {
2938                         /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
2939                         ast_indicate(chan, -1);
2940                 } else {
2941                         /* XXX Redundant?  We should already be playing dialtone */
2942                         /*tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALTONE);*/
2943                         transmit_notify_request(sub, "L/dl");
2944                 }
2945                 if (ast_exists_extension(chan, chan->context, p->dtmf_buf, 1, p->cid_num)) {
2946                         if (!res || !ast_matchmore_extension(chan, chan->context, p->dtmf_buf, 1, p->cid_num)) {
2947                                 if (getforward) {
2948                                         /* Record this as the forwarding extension */
2949                                         ast_copy_string(p->call_forward, p->dtmf_buf, sizeof(p->call_forward));
2950                                         ast_verb(3, "Setting call forward to '%s' on channel %s\n",
2951                                                         p->call_forward, chan->name);
2952                                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
2953                                         transmit_notify_request(sub, "L/sl");
2954                                         if (res)
2955                                                 break;
2956                                         usleep(500000);
2957                                         /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
2958                                         ast_indicate(chan, -1);
2959                                         sleep(1);
2960                                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
2961                                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALTONE);*/
2962                                         transmit_notify_request(sub, "L/dl");
2963                                         len = 0;
2964                                         getforward = 0;
2965                                 } else {
2966                                         /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
2967                                         ast_indicate(chan, -1);
2968                                         ast_copy_string(chan->exten, p->dtmf_buf, sizeof(chan->exten));
2969                                         chan->cid.cid_dnid = ast_strdup(p->dtmf_buf);
2970                                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
2971                                         ast_set_callerid(chan,
2972                                                 p->hidecallerid ? "" : p->cid_num,
2973                                                 p->hidecallerid ? "" : p->cid_name,
2974                                                 chan->cid.cid_ani ? NULL : p->cid_num);
2975                                         ast_setstate(chan, AST_STATE_RING);
2976                                         /*dahdi_enable_ec(p);*/
2977                                         if (p->dtmfmode & MGCP_DTMF_HYBRID) {
2978                                                 p->dtmfmode |= MGCP_DTMF_INBAND;
2979                                                 ast_indicate(chan, -1);
2980                                         }
2981                                         res = ast_pbx_run(chan);
2982                                         if (res) {
2983                                                 ast_log(LOG_WARNING, "PBX exited non-zero\n");
2984                                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
2985                                                 /*transmit_notify_request(p, "nbz", 1);*/
2986                                                 transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
2987                                         }
2988                                         return NULL;
2989                                 }
2990                         } else {
2991                                 /* It's a match, but they just typed a digit, and there is an ambiguous match,
2992                                    so just set the timeout to matchdigittimeout and wait some more */
2993                                 timeout = matchdigittimeout;
2994                         }
2995                 } else if (res == 0) {
2996                         ast_debug(1, "not enough digits (and no ambiguous match)...\n");
2997                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
2998                         transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
2999                         /*dahdi_wait_event(p->subs[index].zfd);*/
3000                         ast_hangup(chan);
3001                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3002                         return NULL;
3003                 } else if (p->hascallwaiting && p->callwaiting && !strcmp(p->dtmf_buf, "*70")) {
3004                         ast_verb(3, "Disabling call waiting on %s\n", chan->name);
3005                         /* Disable call waiting if enabled */
3006                         p->callwaiting = 0;
3007                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3008                         transmit_notify_request(sub, "L/sl");
3009                         len = 0;
3010                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3011                         timeout = firstdigittimeout;
3012                 } else if (!strcmp(p->dtmf_buf,ast_pickup_ext())) {
3013                         /* Scan all channels and see if any there
3014                          * ringing channqels with that have call groups
3015                          * that equal this channels pickup group
3016                          */
3017                         if (ast_pickup_call(chan)) {
3018                                 ast_log(LOG_WARNING, "No call pickup possible...\n");
3019                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
3020                                 transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
3021                         }
3022                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3023                         ast_hangup(chan);
3024                         return NULL;
3025                 } else if (!p->hidecallerid && !strcmp(p->dtmf_buf, "*67")) {
3026                         ast_verb(3, "Disabling Caller*ID on %s\n", chan->name);
3027                         /* Disable Caller*ID if enabled */
3028                         p->hidecallerid = 1;
3029                         ast_set_callerid(chan, "", "", NULL);
3030                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3031                         transmit_notify_request(sub, "L/sl");
3032                         len = 0;
3033                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3034                         timeout = firstdigittimeout;
3035                 } else if (p->callreturn && !strcmp(p->dtmf_buf, "*69")) {
3036                         res = 0;
3037                         if (!ast_strlen_zero(p->lastcallerid)) {
3038                                 res = ast_say_digit_str(chan, p->lastcallerid, "", chan->language);
3039                         }
3040                         if (!res)
3041                                 /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3042                                 transmit_notify_request(sub, "L/sl");
3043                         break;
3044                 } else if (!strcmp(p->dtmf_buf, "*78")) {
3045                         /* Do not disturb */
3046                         ast_verb(3, "Enabled DND on channel %s\n", chan->name);
3047                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3048                         transmit_notify_request(sub, "L/sl");
3049                         p->dnd = 1;
3050                         getforward = 0;
3051                         memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
3052                         len = 0;
3053                 } else if (!strcmp(p->dtmf_buf, "*79")) {
3054                         /* Do not disturb */
3055                         ast_verb(3, "Disabled DND on channel %s\n", chan->name);
3056                         /*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
3057                         transmit_notify_request(sub, "L/sl");
3058                         p->dnd = 0;
3059                         getforward = 0;