1 /*****************************************************************************\
3 ** Linux Call Router **
5 **---------------------------------------------------------------------------**
6 ** Copyright: Andreas Eversberg **
8 ** Asterisk socket client **
10 \*****************************************************************************/
16 To connect, open an LCR socket and send a MESSAGE_HELLO to socket with
17 the application name. This name is unique an can be used for routing calls.
18 Now the channel driver is linked to LCR and can receive and make calls.
21 Call is initiated by LCR:
23 If a call is received from LCR, a MESSAGE_NEWREF is received first.
24 A new chan_call instance is created. The call reference (ref) is given by
25 MESSAGE_NEWREF. The state is CHAN_LCR_STATE_IN_PREPARE.
26 After receiving MESSAGE_SETUP from LCR, the ast_channel instance is created
27 using ast_channel_alloc(1). The setup information is given to asterisk.
28 The new Asterisk instance pointer (ast) is stored to chan_call structure.
29 The state changes to CHAN_LCR_STATE_IN_SETUP.
32 Call is initiated by Asterisk:
34 If a call is requested from Asterisk, a new chan_call instance is created.
35 The new Asterisk instance pointer (ast) is stored to chan_call structure.
36 The current call ref is set to 0, the state is CHAN_LCR_STATE_OUT_PREPARE.
37 If the call is received (lcr_call) A MESSASGE_NEWREF is sent to LCR requesting
38 a new call reference (ref).
39 Further dialing information is queued.
40 After the new callref is received by special MESSAGE_NEWREF reply, new ref
41 is stored in the chan_call structure.
42 The setup information is sent to LCR using MESSAGE_SETUP.
43 The state changes to CHAN_LCR_STATE_OUT_SETUP.
48 During call process, messages are received and sent.
49 The state changes accordingly.
50 Any message is allowed to be sent to LCR at any time except MESSAGE_RELEASE.
51 If a MESSAGE_OVERLAP is received, further dialing is required.
52 Queued dialing information, if any, is sent to LCR using MESSAGE_DIALING.
53 In this case, the state changes to CHAN_LCR_STATE_OUT_DIALING.
56 Call is released by LCR:
58 A MESSAGE_RELEASE is received with the call reference (ref) to be released.
59 The current ref is set to 0, to indicate released reference.
60 The state changes to CHAN_LCR_STATE_RELEASE.
61 ast_queue_hangup() is called, if asterisk instance (ast) exists, if not,
62 the chan_call instance is destroyed.
63 After lcr_hangup() is called-back by Asterisk, the chan_call instance
64 is destroyed, because the current ref is set to 0 and the state equals
65 CHAN_LCR_STATE_RELEASE.
66 If the ref is 0 and the state is not CHAN_LCR_STATE_RELEASE, see the proceedure
67 "Call is released by Asterisk".
70 Call is released by Asterisk:
72 lcr_hangup() is called-back by Asterisk. If the call reference (ref) is set,
73 a MESSAGE_RELEASE is sent to LCR and the chan_call instance is destroyed.
74 If the ref is 0 and the state is not CHAN_LCR_STATE_RELEASE, the new state is
75 set to CHAN_LCR_STATE_RELEASE.
76 Later, if the MESSAGE_NEWREF reply is received, a MESSAGE_RELEASE is sent to
77 LCR and the chan_call instance is destroyed.
78 If the ref is 0 and the state is CHAN_LCR_STATE_RELEASE, see the proceedure
79 "Call is released by LCR".
84 The deadlocking problem:
86 - chan_lcr locks chan_lock and waits inside ast_queue_xxxx() for ast_channel
88 - ast_channel thread locks ast_channel and calls a tech function and waits
89 there for chan_lock to be unlocked.
93 Never call ast_queue_xxxx() if ast_channel is not locked and don't wait until
94 ast_channel can be locked. All messages to asterisk are queued inside call
95 instance and will be handled using a try-lock to get ast_channel lock.
96 If it succeeds to lock ast_channel, the ast_queue_xxxx can safely called even
97 if the lock is incremented and decremented there.
99 Exception: Calling ast_queue_frame inside ast->tech->read is safe, because
100 it is called from ast_channel process which has already locked ast_channel.
109 #include <sys/types.h>
111 //#include <signal.h>
114 #include <sys/ioctl.h>
115 #include <sys/socket.h>
118 #include <semaphore.h>
120 #include <asterisk/module.h>
121 #include <asterisk/channel.h>
122 #include <asterisk/config.h>
123 #include <asterisk/logger.h>
124 #include <asterisk/pbx.h>
125 #include <asterisk/options.h>
126 #include <asterisk/io.h>
127 #include <asterisk/frame.h>
128 #include <asterisk/translate.h>
129 #include <asterisk/cli.h>
130 #include <asterisk/musiconhold.h>
131 #include <asterisk/dsp.h>
132 #include <asterisk/translate.h>
133 #include <asterisk/file.h>
134 #include <asterisk/callerid.h>
135 #include <asterisk/indications.h>
136 #include <asterisk/app.h>
137 #include <asterisk/features.h>
138 #include <asterisk/sched.h>
140 #include "extension.h"
142 #include "callerid.h"
143 #include "lcrsocket.h"
145 #include "bchannel.h"
147 #include "chan_lcr.h"
149 CHAN_LCR_STATE // state description structure
150 MESSAGES // message text
152 unsigned char flip_bits[256];
157 char lcr_type[]="lcr";
160 ast_mutex_t chan_lock; /* global lock */
161 ast_mutex_t log_lock; /* logging log */
164 int glob_channel = 0;
169 struct admin_list *next;
170 struct admin_message msg;
171 } *admin_first = NULL;
173 static struct ast_channel_tech lcr_tech;
178 void chan_lcr_log(int type, const char *file, int line, const char *function, struct chan_call *call, struct ast_channel *ast, const char *fmt, ...)
181 char call_text[128] = "NULL";
182 char ast_text[128] = "NULL";
185 ast_mutex_lock(&log_lock);
188 vsnprintf(buffer,sizeof(buffer)-1,fmt,args);
189 buffer[sizeof(buffer)-1]=0;
193 sprintf(call_text, "%d", call->ref);
195 strncpy(ast_text, ast->name, sizeof(ast_text)-1);
196 ast_text[sizeof(ast_text)-1] = '\0';
198 ast_log(type, file, line, function, "[call=%s ast=%s] %s", call_text, ast_text, buffer);
200 ast_mutex_unlock(&log_lock);
204 * channel and call instances
206 struct chan_call *call_first;
208 struct chan_call *find_call_ref(unsigned int ref)
210 struct chan_call *call = call_first;
214 if (call->ref == ref)
222 struct chan_call *find_call_ast(struct ast_channel *ast)
224 struct chan_call *call = call_first;
228 if (call->ast == ast)
235 struct chan_call *find_call_handle(unsigned int handle)
237 struct chan_call *call = call_first;
241 if (call->bchannel_handle == handle)
249 void free_call(struct chan_call *call)
251 struct chan_call **temp = &call_first;
257 *temp = (*temp)->next;
258 if (call->pipe[0] > -1)
259 close(call->pipe[0]);
260 if (call->pipe[1] > -1)
261 close(call->pipe[1]);
264 if (call->bchannel->call != call)
265 CERROR(call, NULL, "Linked bchannel structure has no link to us.\n");
266 call->bchannel->call = NULL;
268 if (call->bridge_call)
270 if (call->bridge_call->bridge_call != call)
271 CERROR(call, NULL, "Linked call structure has no link to us.\n");
272 call->bridge_call->bridge_call = NULL;
274 CDEBUG(call, NULL, "Call instance freed.\n");
278 temp = &((*temp)->next);
280 CERROR(call, NULL, "Call instance not found in list.\n");
283 struct chan_call *alloc_call(void)
285 struct chan_call **callp = &call_first;
288 callp = &((*callp)->next);
290 *callp = (struct chan_call *)calloc(1, sizeof(struct chan_call));
292 memset(*callp, 0, sizeof(struct chan_call));
293 if (pipe((*callp)->pipe) < 0) {
294 CERROR(*callp, NULL, "Failed to create pipe.\n");
298 fcntl((*callp)->pipe[0], F_SETFL, O_NONBLOCK);
299 CDEBUG(*callp, NULL, "Call instance allocated.\n");
304 unsigned short new_bridge_id(void)
306 struct chan_call *call;
307 unsigned short id = 1;
309 /* search for lowest bridge id that is not in use and not 0 */
315 if (call->bridge_id == id)
323 CDEBUG(NULL, NULL, "New bridge ID %d.\n", id);
328 * enque message to LCR
330 int send_message(int message_type, unsigned int ref, union parameter *param)
332 struct admin_list *admin, **adminp;
335 CDEBUG(NULL, NULL, "Ignoring message %d, because socket is closed.\n", message_type);
338 CDEBUG(NULL, NULL, "Sending %s to socket.\n", messages_txt[message_type]);
340 adminp = &admin_first;
342 adminp = &((*adminp)->next);
343 admin = (struct admin_list *)calloc(1, sizeof(struct admin_list));
345 CERROR(NULL, NULL, "No memory for message to LCR.\n");
350 admin->msg.message = ADMIN_MESSAGE;
351 admin->msg.u.msg.type = message_type;
352 admin->msg.u.msg.ref = ref;
353 memcpy(&admin->msg.u.msg.param, param, sizeof(union parameter));
359 * apply options (in locked state)
361 void apply_opt(struct chan_call *call, char *data)
363 union parameter newparam;
364 char string[1024], *p = string, *opt, *key;
365 int gain, i, newmode = 0;
370 strncpy(string, data, sizeof(string)-1);
371 string[sizeof(string)-1] = '\0';
374 while((opt = strsep(&p, ":")))
378 if (opt[1] == '\0') {
379 CERROR(call, call->ast, "Option 'd' (display) expects parameter.\n", opt);
382 CDEBUG(call, call->ast, "Option 'd' (display) with text '%s'.\n", opt+1);
383 if (call->state == CHAN_LCR_STATE_OUT_PREPARE)
384 strncpy(call->display, opt+1, sizeof(call->display)-1);
386 memset(&newparam, 0, sizeof(union parameter));
387 strncpy(newparam.notifyinfo.display, opt+1, sizeof(newparam.notifyinfo.display)-1);
388 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
392 if (opt[1] != '\0') {
393 CERROR(call, call->ast, "Option 'n' (no DTMF) expects no parameter.\n", opt);
396 CDEBUG(call, call->ast, "Option 'n' (no DTMF).\n");
400 if (opt[1] == '\0') {
401 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter.\n", opt);
405 /* check for 0xXXXX... type of key */
406 if (!!strncmp((char *)key, "0x", 2)) {
407 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter starting with '0x'.\n", opt);
411 if (strlen(key) > 56*2 || (strlen(key) % 1)) {
412 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter with max 56 bytes ('0x' + 112 characters)\n", opt);
418 if (*key>='0' && *key<='9')
419 call->bf_key[i] = (*key-'0') << 8;
420 else if (*key>='a' && *key<='f')
421 call->bf_key[i] = (*key-'a'+10) << 8;
422 else if (*key>='A' && *key<='F')
423 call->bf_key[i] = (*key-'A'+10) << 8;
427 if (*key>='0' && *key<='9')
428 call->bf_key[i] += (*key - '0');
429 else if (*key>='a' && *key<='f')
430 call->bf_key[i] += (*key - 'a' + 10);
431 else if (*key>='A' && *key<='F')
432 call->bf_key[i] += (*key - 'A' + 10);
439 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter with hex values 0-9,a-f.\n");
443 CDEBUG(call, call->ast, "Option 'c' (encrypt) blowfish key '%s' (len=%d).\n", opt+1, i);
445 bchannel_blowfish(call->bchannel, call->bf_key, call->bf_len);
448 if (opt[1] != '\0') {
449 CERROR(call, call->ast, "Option 'h' (HDLC) expects no parameter.\n", opt);
452 CDEBUG(call, call->ast, "Option 'h' (HDLC).\n");
459 if (opt[1] != '\0') {
460 CERROR(call, call->ast, "Option 't' (no_dsp) expects no parameter.\n", opt);
463 CDEBUG(call, call->ast, "Option 't' (no dsp).\n");
470 if (opt[1] == '\0') {
471 CERROR(call, call->ast, "Option 'e' (echo cancel) expects parameter.\n", opt);
474 CDEBUG(call, call->ast, "Option 'e' (echo cancel) with config '%s'.\n", opt+1);
475 strncpy(call->pipeline, opt+1, sizeof(call->pipeline)-1);
477 bchannel_pipeline(call->bchannel, call->pipeline);
480 if (opt[1] != '\0') {
481 CERROR(call, call->ast, "Option 'r' (re-buffer 160 bytes) expects no parameter.\n", opt);
484 CDEBUG(call, call->ast, "Option 'r' (re-buffer 160 bytes)");
489 if (opt[1] != '\0') {
490 CERROR(call, call->ast, "Option 's' (inband DTMF) expects no parameter.\n", opt);
493 CDEBUG(call, call->ast, "Option 's' (inband DTMF).\n");
494 call->inband_dtmf = 1;
499 if (opt[1] != 'r' && opt[1] != 't') {
500 CERROR(call, call->ast, "Option 'v' (volume) expects parameter.\n", opt);
504 if (gain < -8 || gain >8) {
505 CERROR(call, call->ast, "Option 'v' (volume) expects parameter in range of -8 through 8.\n");
508 CDEBUG(call, call->ast, "Option 'v' (volume) with gain 2^%d.\n", gain);
510 call->rx_gain = gain;
512 bchannel_gain(call->bchannel, call->rx_gain, 0);
514 call->tx_gain = gain;
516 bchannel_gain(call->bchannel, call->tx_gain, 1);
520 CERROR(call, call->ast, "Option '%s' unknown.\n", opt);
524 /* re-open, if bchannel is created */
525 if (call->bchannel && call->bchannel->b_sock > -1) {
526 bchannel_destroy(call->bchannel);
527 if (bchannel_create(call->bchannel, ((call->nodsp)?1:0) + ((call->hdlc)?2:0)))
528 bchannel_activate(call->bchannel, 1);
533 * send setup info to LCR
534 * this function is called, when asterisk call is received and ref is received
536 static void send_setup_to_lcr(struct chan_call *call)
538 union parameter newparam;
539 struct ast_channel *ast = call->ast;
541 if (!call->ast || !call->ref)
544 CDEBUG(call, call->ast, "Sending setup to LCR. (interface=%s dialstring=%s, cid=%s)\n", call->interface, call->dialstring, call->cid_num);
546 /* send setup message to LCR */
547 memset(&newparam, 0, sizeof(union parameter));
548 newparam.setup.dialinginfo.itype = INFO_ITYPE_ISDN;
549 newparam.setup.dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
550 strncpy(newparam.setup.dialinginfo.id, call->dialstring, sizeof(newparam.setup.dialinginfo.id)-1);
551 strncpy(newparam.setup.dialinginfo.interfaces, call->interface, sizeof(newparam.setup.dialinginfo.interfaces)-1);
552 newparam.setup.callerinfo.itype = INFO_ITYPE_CHAN;
553 newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN;
554 strncpy(newparam.setup.callerinfo.display, call->display, sizeof(newparam.setup.callerinfo.display)-1);
555 call->display[0] = '\0';
556 if (call->cid_num[0])
557 strncpy(newparam.setup.callerinfo.id, call->cid_num, sizeof(newparam.setup.callerinfo.id)-1);
558 if (call->cid_name[0])
559 strncpy(newparam.setup.callerinfo.name, call->cid_name, sizeof(newparam.setup.callerinfo.name)-1);
560 if (call->cid_rdnis[0])
562 strncpy(newparam.setup.redirinfo.id, call->cid_rdnis, sizeof(newparam.setup.redirinfo.id)-1);
563 newparam.setup.redirinfo.itype = INFO_ITYPE_CHAN;
564 newparam.setup.redirinfo.ntype = INFO_NTYPE_UNKNOWN;
566 switch(ast->cid.cid_pres & AST_PRES_RESTRICTION)
568 case AST_PRES_ALLOWED:
569 newparam.setup.callerinfo.present = INFO_PRESENT_ALLOWED;
571 case AST_PRES_RESTRICTED:
572 newparam.setup.callerinfo.present = INFO_PRESENT_RESTRICTED;
574 case AST_PRES_UNAVAILABLE:
575 newparam.setup.callerinfo.present = INFO_PRESENT_NOTAVAIL;
578 newparam.setup.callerinfo.present = INFO_PRESENT_NULL;
580 switch(ast->cid.cid_ton)
583 newparam.setup.callerinfo.ntype = INFO_NTYPE_SUBSCRIBER;
586 newparam.setup.callerinfo.ntype = INFO_NTYPE_NATIONAL;
589 newparam.setup.callerinfo.ntype = INFO_NTYPE_INTERNATIONAL;
592 newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN;
594 newparam.setup.capainfo.bearer_capa = ast->transfercapability;
595 newparam.setup.capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
597 newparam.setup.capainfo.source_mode = B_MODE_HDLC;
599 newparam.setup.capainfo.source_mode = B_MODE_TRANSPARENT;
600 newparam.setup.capainfo.bearer_info1 = (options.law=='a')?3:2;
602 newparam.setup.capainfo.hlc = INFO_HLC_NONE;
603 newparam.setup.capainfo.exthlc = INFO_HLC_NONE;
604 send_message(MESSAGE_SETUP, call->ref, &newparam);
606 /* change to outgoing setup state */
607 call->state = CHAN_LCR_STATE_OUT_SETUP;
611 * send dialing info to LCR
612 * this function is called, when setup acknowledge is received and dialing
615 static void send_dialque_to_lcr(struct chan_call *call)
617 union parameter newparam;
619 if (!call->ast || !call->ref || !call->dialque[0])
622 CDEBUG(call, call->ast, "Sending dial queue to LCR. (dialing=%s)\n", call->dialque);
624 /* send setup message to LCR */
625 memset(&newparam, 0, sizeof(union parameter));
626 strncpy(newparam.information.id, call->dialque, sizeof(newparam.information.id)-1);
627 call->dialque[0] = '\0';
628 send_message(MESSAGE_INFORMATION, call->ref, &newparam);
632 * in case of a bridge, the unsupported message can be forwarded directly
633 * to the remote call.
635 static void bridge_message_if_bridged(struct chan_call *call, int message_type, union parameter *param)
639 if (!call->bridge_call) return;
640 CDEBUG(call, NULL, "Sending message due briding.\n");
641 send_message(message_type, call->bridge_call->ref, param);
645 * send release message to LCR and import bchannel if exported
647 static void send_release_and_import(struct chan_call *call, int cause, int location)
649 union parameter newparam;
651 /* importing channel */
652 if (call->bchannel) {
653 memset(&newparam, 0, sizeof(union parameter));
654 newparam.bchannel.type = BCHANNEL_RELEASE;
655 newparam.bchannel.handle = call->bchannel->handle;
656 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
658 /* sending release */
659 memset(&newparam, 0, sizeof(union parameter));
660 newparam.disconnectinfo.cause = cause;
661 newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
662 send_message(MESSAGE_RELEASE, call->ref, &newparam);
666 * check if extension matches and start asterisk
667 * if it can match, proceed
670 static void lcr_start_pbx(struct chan_call *call, struct ast_channel *ast, int complete)
673 union parameter newparam;
675 CDEBUG(call, ast, "Try to start pbx. (exten=%s context=%s complete=%s)\n", ast->exten, ast->context, complete?"yes":"no");
680 if (!ast_canmatch_extension(ast, ast->context, ast->exten, 1, call->oad))
682 CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at context '%s' - releasing.\n", ast->exten, ast->context);
686 if (!ast_exists_extension(ast, ast->context, ast->exten, 1, call->oad))
688 CDEBUG(call, ast, "Got 'sending complete', but extension '%s' would match at context '%s', if more digits would be dialed - releasing.\n", ast->exten, ast->context);
692 CDEBUG(call, ast, "Got 'sending complete', extensions matches.\n");
693 /* send setup acknowledge to lcr */
694 memset(&newparam, 0, sizeof(union parameter));
695 send_message(MESSAGE_PROCEEDING, call->ref, &newparam);
698 call->state = CHAN_LCR_STATE_IN_PROCEEDING;
703 if (ast_canmatch_extension(ast, ast->context, ast->exten, 1, call->oad))
705 /* send setup acknowledge to lcr */
706 if (call->state != CHAN_LCR_STATE_IN_DIALING) {
707 memset(&newparam, 0, sizeof(union parameter));
708 send_message(MESSAGE_OVERLAP, call->ref, &newparam);
712 call->state = CHAN_LCR_STATE_IN_DIALING;
714 /* if match, start pbx */
715 if (ast_exists_extension(ast, ast->context, ast->exten, 1, call->oad)) {
716 CDEBUG(call, ast, "Extensions matches.\n");
721 CDEBUG(call, ast, "Extensions may match, if more digits are dialed.\n");
729 CDEBUG(call, ast, "Releasing due to extension missmatch.\n");
730 send_release_and_import(call, cause, LOCATION_PRIVATE_LOCAL);
732 /* release asterisk */
733 ast->hangupcause = call->cause;
734 /* change to release state */
735 call->state = CHAN_LCR_STATE_RELEASE;
736 ast_hangup(ast); // call will be destroyed here
740 /* send setup to asterisk */
741 CDEBUG(call, ast, "Starting call to Asterisk due to matching extension.\n");
742 ret = ast_pbx_start(ast);
745 cause = (ret==-2)?34:27;
748 call->pbx_started = 1;
749 // if (call->state == CHAN_LCR_STATE_IN_DIALING)
750 ast_setstate(ast, AST_STATE_RINGING);
752 // ast_setstate(ast, AST_STATE_RINGING);
757 * incoming setup from LCR
759 static void lcr_in_setup(struct chan_call *call, int message_type, union parameter *param)
761 struct ast_channel *ast;
763 CDEBUG(call, NULL, "Incomming setup from LCR. (callerid %s, dialing %s)\n", param->setup.callerinfo.id, param->setup.dialinginfo.id);
765 /* create asterisk channel instrance */
766 ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel);
770 CERROR(call, NULL, "Failed to create Asterisk channel - releasing.\n");
771 send_release_and_import(call, CAUSE_RESSOURCEUNAVAIL, LOCATION_PRIVATE_LOCAL);
778 ast->tech_pvt = call;
779 ast->tech = &lcr_tech;
780 ast->fds[0] = call->pipe[0];
782 /* fill setup information */
783 if (param->setup.dialinginfo.id)
784 strncpy(ast->exten, param->setup.dialinginfo.id, AST_MAX_EXTENSION-1);
785 if (param->setup.context[0])
786 strncpy(ast->context, param->setup.context, AST_MAX_CONTEXT-1);
788 strncpy(ast->context, param->setup.callerinfo.interface, AST_MAX_CONTEXT-1);
789 if (param->setup.callerinfo.id[0])
790 ast->cid.cid_num = strdup(param->setup.callerinfo.id);
791 if (param->setup.callerinfo.name[0])
792 ast->cid.cid_name = strdup(param->setup.callerinfo.name);
793 if (param->setup.redirinfo.id[0])
794 ast->cid.cid_name = strdup(numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international));
795 switch (param->setup.callerinfo.present)
797 case INFO_PRESENT_ALLOWED:
798 ast->cid.cid_pres = AST_PRES_ALLOWED;
800 case INFO_PRESENT_RESTRICTED:
801 ast->cid.cid_pres = AST_PRES_RESTRICTED;
804 ast->cid.cid_pres = AST_PRES_UNAVAILABLE;
806 switch (param->setup.callerinfo.ntype)
808 case INFO_NTYPE_SUBSCRIBER:
809 ast->cid.cid_ton = 4;
811 case INFO_NTYPE_NATIONAL:
812 ast->cid.cid_ton = 2;
814 case INFO_NTYPE_INTERNATIONAL:
815 ast->cid.cid_ton = 1;
818 ast->cid.cid_ton = 0;
820 ast->transfercapability = param->setup.capainfo.bearer_capa;
821 /* enable hdlc if transcap is data */
822 if (param->setup.capainfo.source_mode == B_MODE_HDLC)
824 strncpy(call->oad, numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international), sizeof(call->oad)-1);
826 /* configure channel */
827 ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
828 ast->readformat = ast->rawreadformat = ast->nativeformats;
829 ast->writeformat = ast->rawwriteformat = ast->nativeformats;
831 ast->hangupcause = 0;
834 call->state = CHAN_LCR_STATE_IN_SETUP;
836 if (!call->pbx_started)
837 lcr_start_pbx(call, ast, param->setup.dialinginfo.sending_complete);
841 * incoming setup acknowledge from LCR
843 static void lcr_in_overlap(struct chan_call *call, int message_type, union parameter *param)
845 if (!call->ast) return;
847 CDEBUG(call, call->ast, "Incomming setup acknowledge from LCR.\n");
849 /* send pending digits in dialque */
850 if (call->dialque[0])
851 send_dialque_to_lcr(call);
852 /* change to overlap state */
853 call->state = CHAN_LCR_STATE_OUT_DIALING;
857 * incoming proceeding from LCR
859 static void lcr_in_proceeding(struct chan_call *call, int message_type, union parameter *param)
861 CDEBUG(call, call->ast, "Incomming proceeding from LCR.\n");
864 call->state = CHAN_LCR_STATE_OUT_PROCEEDING;
865 /* queue event for asterisk */
866 if (call->ast && call->pbx_started)
867 strncat(call->queue_string, "P", sizeof(call->queue_string)-1);
871 * incoming alerting from LCR
873 static void lcr_in_alerting(struct chan_call *call, int message_type, union parameter *param)
875 CDEBUG(call, call->ast, "Incomming alerting from LCR.\n");
878 call->state = CHAN_LCR_STATE_OUT_ALERTING;
879 /* queue event to asterisk */
880 if (call->ast && call->pbx_started)
881 strncat(call->queue_string, "R", sizeof(call->queue_string)-1);
885 * incoming connect from LCR
887 static void lcr_in_connect(struct chan_call *call, int message_type, union parameter *param)
889 union parameter newparam;
891 CDEBUG(call, call->ast, "Incomming connect (answer) from LCR.\n");
894 call->state = CHAN_LCR_STATE_CONNECT;
895 /* request bchannel */
896 if (!call->bchannel) {
897 CDEBUG(call, call->ast, "Requesting B-channel.\n");
898 memset(&newparam, 0, sizeof(union parameter));
899 newparam.bchannel.type = BCHANNEL_REQUEST;
900 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
902 /* copy connectinfo */
903 memcpy(&call->connectinfo, ¶m->connectinfo, sizeof(struct connect_info));
904 /* queue event to asterisk */
905 if (call->ast && call->pbx_started)
906 strncat(call->queue_string, "A", sizeof(call->queue_string)-1);
910 * incoming disconnect from LCR
912 static void lcr_in_disconnect(struct chan_call *call, int message_type, union parameter *param)
914 struct ast_channel *ast = call->ast;
916 CDEBUG(call, call->ast, "Incomming disconnect from LCR. (cause=%d)\n", param->disconnectinfo.cause);
919 call->state = CHAN_LCR_STATE_IN_DISCONNECT;
921 call->cause = param->disconnectinfo.cause;
922 call->location = param->disconnectinfo.location;
923 /* if bridge, forward disconnect and return */
926 if (call->bridge_call)
928 CDEBUG(call, call->ast, "Only signal disconnect via bridge.\n");
929 bridge_message_if_bridged(call, message_type, param);
933 /* release lcr with same cause */
934 send_release_and_import(call, call->cause, call->location);
936 /* change to release state */
937 call->state = CHAN_LCR_STATE_RELEASE;
938 /* queue release asterisk */
941 ast->hangupcause = call->cause;
942 if (call->pbx_started)
943 strcpy(call->queue_string, "H"); // overwrite other indications
945 ast_hangup(ast); // call will be destroyed here
951 * incoming setup acknowledge from LCR
953 static void lcr_in_release(struct chan_call *call, int message_type, union parameter *param)
955 struct ast_channel *ast = call->ast;
957 CDEBUG(call, call->ast, "Incomming release from LCR, releasing ref. (cause=%d)\n", param->disconnectinfo.cause);
961 /* change to release state */
962 call->state = CHAN_LCR_STATE_RELEASE;
963 /* copy release info */
966 call->cause = param->disconnectinfo.cause;
967 call->location = param->disconnectinfo.location;
969 /* if we have an asterisk instance, queue hangup, else we are done */
972 ast->hangupcause = call->cause;
973 if (call->pbx_started)
974 strcpy(call->queue_string, "H");
976 ast_hangup(ast); // call will be destroyed here
986 * incoming information from LCR
988 static void lcr_in_information(struct chan_call *call, int message_type, union parameter *param)
990 struct ast_channel *ast = call->ast;
992 CDEBUG(call, call->ast, "Incoming information from LCR. (dialing=%s)\n", param->information.id);
996 /* pbx not started */
997 if (!call->pbx_started)
999 CDEBUG(call, call->ast, "Asterisk not started, adding digits to number.\n");
1000 strncat(ast->exten, param->information.id, AST_MAX_EXTENSION-1);
1001 lcr_start_pbx(call, ast, param->information.sending_complete);
1005 /* change dailing state after setup */
1006 if (call->state == CHAN_LCR_STATE_IN_SETUP) {
1007 CDEBUG(call, call->ast, "Changing from SETUP to DIALING state.\n");
1008 call->state = CHAN_LCR_STATE_IN_DIALING;
1009 // ast_setstate(ast, AST_STATE_DIALING);
1013 if (call->state == CHAN_LCR_STATE_IN_DIALING && param->information.id[0])
1014 strncat(call->queue_string, param->information.id, sizeof(call->queue_string)-1);
1016 /* use bridge to forware message not supported by asterisk */
1017 if (call->state == CHAN_LCR_STATE_CONNECT) {
1018 CDEBUG(call, call->ast, "Call is connected, briding.\n");
1019 bridge_message_if_bridged(call, message_type, param);
1024 * incoming information from LCR
1026 static void lcr_in_notify(struct chan_call *call, int message_type, union parameter *param)
1028 union parameter newparam;
1030 CDEBUG(call, call->ast, "Incomming notify from LCR. (notify=%d)\n", param->notifyinfo.notify);
1032 /* request bchannel, if call is resumed and we don't have it */
1033 if (param->notifyinfo.notify == INFO_NOTIFY_USER_RESUMED && !call->bchannel && call->ref) {
1034 CDEBUG(call, call->ast, "Reqesting bchannel at resume.\n");
1035 memset(&newparam, 0, sizeof(union parameter));
1036 newparam.bchannel.type = BCHANNEL_REQUEST;
1037 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
1040 if (!call->ast) return;
1042 /* use bridge to forware message not supported by asterisk */
1043 bridge_message_if_bridged(call, message_type, param);
1047 * incoming information from LCR
1049 static void lcr_in_facility(struct chan_call *call, int message_type, union parameter *param)
1051 CDEBUG(call, call->ast, "Incomming facility from LCR.\n");
1053 if (!call->ast) return;
1055 /* use bridge to forware message not supported by asterisk */
1056 bridge_message_if_bridged(call, message_type, param);
1060 * got dtmf from bchannel (locked state)
1062 void lcr_in_dtmf(struct chan_call *call, int val)
1064 struct ast_channel *ast = call->ast;
1069 if (!call->pbx_started)
1072 CDEBUG(call, call->ast, "Recognised DTMF digit '%c'.\n", val);
1075 strncat(call->queue_string, digit, sizeof(call->queue_string)-1);
1079 * message received from LCR
1081 int receive_message(int message_type, unsigned int ref, union parameter *param)
1083 struct bchannel *bchannel;
1084 struct chan_call *call;
1085 union parameter newparam;
1087 memset(&newparam, 0, sizeof(union parameter));
1089 /* handle bchannel message*/
1090 if (message_type == MESSAGE_BCHANNEL)
1092 switch(param->bchannel.type)
1094 case BCHANNEL_ASSIGN:
1095 CDEBUG(NULL, NULL, "Received BCHANNEL_ASSIGN message. (handle=%08lx) for ref %d\n", param->bchannel.handle, ref);
1096 if ((bchannel = find_bchannel_handle(param->bchannel.handle)))
1098 CERROR(NULL, NULL, "bchannel handle %x already assigned.\n", (int)param->bchannel.handle);
1101 /* create bchannel */
1102 bchannel = alloc_bchannel(param->bchannel.handle);
1105 CERROR(NULL, NULL, "alloc bchannel handle %x failed.\n", (int)param->bchannel.handle);
1109 /* configure channel */
1110 bchannel->b_tx_gain = param->bchannel.tx_gain;
1111 bchannel->b_rx_gain = param->bchannel.rx_gain;
1112 strncpy(bchannel->b_pipeline, param->bchannel.pipeline, sizeof(bchannel->b_pipeline)-1);
1113 if (param->bchannel.crypt_len && param->bchannel.crypt_len <= sizeof(bchannel->b_bf_key))
1115 bchannel->b_bf_len = param->bchannel.crypt_len;
1116 memcpy(bchannel->b_bf_key, param->bchannel.crypt, param->bchannel.crypt_len);
1118 bchannel->b_txdata = 0;
1119 bchannel->b_dtmf = 1;
1120 bchannel->b_tx_dejitter = 1;
1122 /* in case, ref is not set, this bchannel instance must
1123 * be created until it is removed again by LCR */
1125 call = find_call_ref(ref);
1128 bchannel->call = call;
1129 call->bchannel = bchannel;
1131 bchannel_dtmf(bchannel, 1);
1133 bchannel_blowfish(bchannel, call->bf_key, call->bf_len);
1134 if (call->pipeline[0])
1135 bchannel_pipeline(bchannel, call->pipeline);
1137 bchannel_gain(bchannel, call->rx_gain, 0);
1139 bchannel_gain(bchannel, call->tx_gain, 1);
1140 if (call->bridge_id) {
1141 CDEBUG(call, call->ast, "Join bchannel, because call is already bridged.\n");
1142 bchannel_join(bchannel, call->bridge_id);
1144 /* create only, if call exists, othewhise it bchannel is freed below... */
1145 if (bchannel_create(bchannel, ((call->nodsp)?1:0) + ((call->hdlc)?2:0)))
1146 bchannel_activate(bchannel, 1);
1149 newparam.bchannel.type = BCHANNEL_ASSIGN_ACK;
1150 newparam.bchannel.handle = param->bchannel.handle;
1151 send_message(MESSAGE_BCHANNEL, 0, &newparam);
1152 /* if call has released before bchannel is assigned */
1154 newparam.bchannel.type = BCHANNEL_RELEASE;
1155 newparam.bchannel.handle = param->bchannel.handle;
1156 send_message(MESSAGE_BCHANNEL, 0, &newparam);
1161 case BCHANNEL_REMOVE:
1162 CDEBUG(NULL, NULL, "Received BCHANNEL_REMOVE message. (handle=%08lx)\n", param->bchannel.handle);
1163 if (!(bchannel = find_bchannel_handle(param->bchannel.handle)))
1165 CERROR(NULL, NULL, "Bchannel handle %x not assigned.\n", (int)param->bchannel.handle);
1168 /* unklink from call and destroy bchannel */
1169 free_bchannel(bchannel);
1172 newparam.bchannel.type = BCHANNEL_REMOVE_ACK;
1173 newparam.bchannel.handle = param->bchannel.handle;
1174 send_message(MESSAGE_BCHANNEL, 0, &newparam);
1179 CDEBUG(NULL, NULL, "Received unknown bchannel message %d.\n", param->bchannel.type);
1184 /* handle new ref */
1185 if (message_type == MESSAGE_NEWREF)
1187 if (param->direction)
1189 /* new ref from lcr */
1190 CDEBUG(NULL, NULL, "Received new ref by LCR, due to incomming call. (ref=%ld)\n", ref);
1191 if (!ref || find_call_ref(ref))
1193 CERROR(NULL, NULL, "Illegal new ref %ld received.\n", ref);
1196 /* allocate new call instance */
1197 call = alloc_call();
1199 call->state = CHAN_LCR_STATE_IN_PREPARE;
1202 /* wait for setup (or release from asterisk) */
1205 /* new ref, as requested from this remote application */
1206 CDEBUG(NULL, NULL, "Received new ref by LCR, as requested from chan_lcr. (ref=%ld)\n", ref);
1207 call = find_call_ref(0);
1210 /* send release, if ref does not exist */
1211 CDEBUG(NULL, NULL, "No call found, that requests a ref.\n");
1212 send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
1217 /* send pending setup info */
1218 if (call->state == CHAN_LCR_STATE_OUT_PREPARE)
1219 send_setup_to_lcr(call);
1220 /* release if asterisk has signed off */
1221 else if (call->state == CHAN_LCR_STATE_RELEASE)
1225 send_release_and_import(call, call->cause, call->location);
1227 send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
1239 CERROR(NULL, NULL, "Received message %d without ref.\n", message_type);
1242 call = find_call_ref(ref);
1245 /* ignore ref that is not used (anymore) */
1246 CDEBUG(NULL, NULL, "Message %d from LCR ignored, because no call instance found.\n", message_type);
1250 /* handle messages */
1251 switch(message_type)
1254 lcr_in_setup(call, message_type, param);
1257 case MESSAGE_OVERLAP:
1258 lcr_in_overlap(call, message_type, param);
1261 case MESSAGE_PROCEEDING:
1262 lcr_in_proceeding(call, message_type, param);
1265 case MESSAGE_ALERTING:
1266 lcr_in_alerting(call, message_type, param);
1269 case MESSAGE_CONNECT:
1270 lcr_in_connect(call, message_type, param);
1273 case MESSAGE_DISCONNECT:
1274 lcr_in_disconnect(call, message_type, param);
1277 case MESSAGE_RELEASE:
1278 lcr_in_release(call, message_type, param);
1281 case MESSAGE_INFORMATION:
1282 lcr_in_information(call, message_type, param);
1285 case MESSAGE_NOTIFY:
1286 lcr_in_notify(call, message_type, param);
1289 case MESSAGE_FACILITY:
1290 lcr_in_facility(call, message_type, param);
1293 case MESSAGE_PATTERN: // audio available from LCR
1296 case MESSAGE_NOPATTERN: // audio not available from LCR
1299 case MESSAGE_AUDIOPATH: // if remote audio connected or hold
1300 call->audiopath = param->audiopath;
1304 CDEBUG(call, call->ast, "Message %d from LCR unhandled.\n", message_type);
1311 * release all calls (due to broken socket)
1313 static void release_all_calls(void)
1315 struct chan_call *call;
1320 /* no ast, so we may directly free call */
1322 CDEBUG(call, NULL, "Freeing call, because no Asterisk channel is linked.\n");
1326 /* already in release process */
1327 if (call->state == CHAN_LCR_STATE_RELEASE) {
1331 /* release or queue release */
1333 call->state = CHAN_LCR_STATE_RELEASE;
1334 if (!call->pbx_started) {
1335 CDEBUG(call, call->ast, "Releasing call, because no Asterisk channel is not started.\n");
1336 ast_hangup(call->ast); // call will be destroyed here
1339 CDEBUG(call, call->ast, "Queue call release, because Asterisk channel is running.\n");
1340 strcpy(call->queue_string, "H");
1344 /* release all bchannels */
1345 while(bchannel_first)
1346 free_bchannel(bchannel_first);
1351 * warning! not thread safe
1352 * returns -1 for socket error, 0 for no work, 1 for work
1354 int handle_socket(void)
1358 struct admin_list *admin;
1359 struct admin_message msg;
1361 /* read from socket */
1362 len = read(lcr_sock, &msg, sizeof(msg));
1365 CERROR(NULL, NULL, "Socket closed.\n");
1366 return(-1); // socket closed
1370 if (len != sizeof(msg))
1372 CERROR(NULL, NULL, "Socket short read. (len %d)\n", len);
1373 return(-1); // socket error
1375 if (msg.message != ADMIN_MESSAGE)
1377 CERROR(NULL, NULL, "Socket received illegal message %d.\n", msg.message);
1380 receive_message(msg.u.msg.type, msg.u.msg.ref, &msg.u.msg.param);
1384 if (errno != EWOULDBLOCK)
1386 CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno);
1391 /* write to socket */
1394 admin = admin_first;
1395 len = write(lcr_sock, &admin->msg, sizeof(msg));
1398 CERROR(NULL, NULL, "Socket closed.\n");
1399 return(-1); // socket closed
1403 if (len != sizeof(msg))
1405 CERROR(NULL, NULL, "Socket short write. (len %d)\n", len);
1406 return(-1); // socket error
1409 admin_first = admin->next;
1415 if (errno != EWOULDBLOCK)
1417 CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno);
1426 * open and close socket and thread
1428 int open_socket(void)
1432 struct sockaddr_un sock_address;
1433 unsigned int on = 1;
1434 union parameter param;
1437 if ((lcr_sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
1439 CERROR(NULL, NULL, "Failed to create socket.\n");
1443 /* set socket address and name */
1444 memset(&sock_address, 0, sizeof(sock_address));
1445 sock_address.sun_family = PF_UNIX;
1446 sprintf(sock_address.sun_path, SOCKET_NAME, options.lock);
1448 /* connect socket */
1449 if ((conn = connect(lcr_sock, (struct sockaddr *)&sock_address, SUN_LEN(&sock_address))) < 0)
1453 CDEBUG(NULL, NULL, "Failed to connect to socket '%s'. Is LCR running?\n", sock_address.sun_path);
1457 /* set non-blocking io */
1458 if ((ret = ioctl(lcr_sock, FIONBIO, (unsigned char *)(&on))) < 0)
1462 CERROR(NULL, NULL, "Failed to set socket into non-blocking IO.\n");
1466 /* enque hello message */
1467 memset(¶m, 0, sizeof(param));
1468 strcpy(param.hello.application, "asterisk");
1469 send_message(MESSAGE_HELLO, 0, ¶m);
1474 void close_socket(void)
1476 struct admin_list *admin, *temp;
1478 /* flush pending messages */
1479 admin = admin_first;
1482 admin = admin->next;
1494 /* sending queue to asterisk */
1495 static int queue_send(void)
1498 struct chan_call *call;
1499 struct ast_channel *ast;
1500 struct ast_frame fr;
1505 p = call->queue_string;
1508 /* there is something to queue */
1509 if (!ast_channel_trylock(ast)) { /* succeed */
1513 CDEBUG(call, ast, "Sending queued PROCEEDING to Asterisk.\n");
1514 ast_queue_control(ast, AST_CONTROL_PROCEEDING);
1517 CDEBUG(call, ast, "Sending queued RINGING to Asterisk.\n");
1518 ast_queue_control(ast, AST_CONTROL_RINGING);
1521 CDEBUG(call, ast, "Sending queued ANSWER to Asterisk.\n");
1522 ast_queue_control(ast, AST_CONTROL_ANSWER);
1525 CDEBUG(call, ast, "Sending queued HANGUP to Asterisk.\n");
1526 ast_queue_hangup(ast);
1528 case '1': case '2': case '3': case 'a':
1529 case '4': case '5': case '6': case 'b':
1530 case '7': case '8': case '9': case 'c':
1531 case '*': case '0': case '#': case 'd':
1532 CDEBUG(call, ast, "Sending queued digit '%c' to Asterisk.\n", *p);
1533 /* send digit to asterisk */
1534 memset(&fr, 0, sizeof(fr));
1535 fr.frametype = AST_FRAME_DTMF_BEGIN;
1537 fr.delivery = ast_tv(0, 0);
1538 ast_queue_frame(ast, &fr);
1539 fr.frametype = AST_FRAME_DTMF_END;
1540 ast_queue_frame(ast, &fr);
1543 CDEBUG(call, ast, "Ignoring queued digit 0x%02d.\n", *p);
1547 call->queue_string[0] = '\0';
1548 ast_channel_unlock(ast);
1558 /* signal handler */
1559 void sighandler(int sigset)
1563 /* chan_lcr thread */
1564 static void *chan_thread(void *arg)
1568 union parameter param;
1569 time_t retry = 0, now;
1571 bchannel_pid = getpid();
1573 // signal(SIGPIPE, sighandler);
1575 memset(¶m, 0, sizeof(union parameter));
1579 ast_mutex_lock(&chan_lock);
1586 ret = handle_socket();
1588 CERROR(NULL, NULL, "Handling of socket failed - closing for some seconds.\n");
1590 release_all_calls();
1597 if (retry && now-retry > 5) {
1598 CDEBUG(NULL, NULL, "Retry to open socket.\n");
1600 if (open_socket() < 0) {
1609 ret = bchannel_handle();
1613 /* handle messages to asterisk */
1618 /* delay if no work done */
1620 ast_mutex_unlock(&chan_lock);
1622 ast_mutex_lock(&chan_lock);
1628 CERROR(NULL, NULL, "Thread exit.\n");
1630 ast_mutex_unlock(&chan_lock);
1632 // signal(SIGPIPE, SIG_DFL);
1638 * new asterisk instance
1641 struct ast_channel *lcr_request(const char *type, int format, void *data, int *cause)
1643 char exten[256], *dial, *interface, *opt;
1644 struct ast_channel *ast;
1645 struct chan_call *call;
1647 ast_mutex_lock(&chan_lock);
1648 CDEBUG(NULL, NULL, "Received request from Asterisk. (data=%s)\n", (char *)data);
1650 /* if socket is closed */
1653 CERROR(NULL, NULL, "Rejecting call from Asterisk, because LCR not running.\n");
1654 ast_mutex_unlock(&chan_lock);
1658 /* create call instance */
1659 call = alloc_call();
1662 /* failed to create instance */
1663 ast_mutex_unlock(&chan_lock);
1667 /* create asterisk channel instrance */
1668 ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel);
1671 CERROR(NULL, NULL, "Failed to create Asterisk channel.\n");
1673 /* failed to create instance */
1674 ast_mutex_unlock(&chan_lock);
1677 ast->tech = &lcr_tech;
1678 ast->tech_pvt = (void *)1L; // set pointer or asterisk will not call
1679 /* configure channel */
1680 ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
1681 ast->readformat = ast->rawreadformat = ast->nativeformats;
1682 ast->writeformat = ast->rawwriteformat = ast->nativeformats;
1684 ast->hangupcause = 0;
1688 ast->tech_pvt = call;
1689 ast->fds[0] = call->pipe[0];
1690 call->pbx_started = 0;
1692 call->state = CHAN_LCR_STATE_OUT_PREPARE;
1695 * Extract interface, dialstring, options from data.
1698 * <interface>/<dialstring>
1699 * <interface>/<dialstring>/options
1701 strncpy(exten, (char *)data, sizeof(exten)-1);
1702 exten[sizeof(exten)-1] = '\0';
1703 if ((dial = strchr(exten, '/'))) {
1706 if ((opt = strchr(dial, '/')))
1715 strncpy(call->interface, interface, sizeof(call->interface)-1);
1716 strncpy(call->dialstring, dial, sizeof(call->dialstring)-1);
1717 apply_opt(call, (char *)opt);
1719 ast_mutex_unlock(&chan_lock);
1724 * call from asterisk
1726 static int lcr_call(struct ast_channel *ast, char *dest, int timeout)
1728 union parameter newparam;
1729 struct chan_call *call;
1731 ast_mutex_lock(&chan_lock);
1732 call = ast->tech_pvt;
1734 CERROR(NULL, ast, "Received call from Asterisk, but call instance does not exist.\n");
1735 ast_mutex_unlock(&chan_lock);
1739 CDEBUG(NULL, ast, "Received call from Asterisk.\n");
1741 /* pbx process is started */
1742 call->pbx_started = 1;
1743 /* send MESSAGE_NEWREF */
1744 memset(&newparam, 0, sizeof(union parameter));
1745 newparam.direction = 0; /* request from app */
1746 send_message(MESSAGE_NEWREF, 0, &newparam);
1748 /* set hdlc if capability requires hdlc */
1749 if (ast->transfercapability == INFO_BC_DATAUNRESTRICTED
1750 || ast->transfercapability == INFO_BC_DATARESTRICTED
1751 || ast->transfercapability == INFO_BC_VIDEO)
1753 /* if hdlc is forced by option, we change transcap to data */
1755 && ast->transfercapability != INFO_BC_DATAUNRESTRICTED
1756 && ast->transfercapability != INFO_BC_DATARESTRICTED
1757 && ast->transfercapability != INFO_BC_VIDEO)
1758 ast->transfercapability = INFO_BC_DATAUNRESTRICTED;
1760 call->cid_num[0] = 0;
1761 call->cid_name[0] = 0;
1762 call->cid_rdnis[0] = 0;
1764 if (ast->cid.cid_num) if (ast->cid.cid_num[0])
1765 strncpy(call->cid_num, ast->cid.cid_num,
1766 sizeof(call->cid_num)-1);
1768 if (ast->cid.cid_name) if (ast->cid.cid_name[0])
1769 strncpy(call->cid_name, ast->cid.cid_name,
1770 sizeof(call->cid_name)-1);
1771 if (ast->cid.cid_rdnis) if (ast->cid.cid_rdnis[0])
1772 strncpy(call->cid_rdnis, ast->cid.cid_rdnis,
1773 sizeof(call->cid_rdnis)-1);
1775 ast_mutex_unlock(&chan_lock);
1779 static int lcr_digit_begin(struct ast_channel *ast, char digit)
1781 struct chan_call *call;
1782 union parameter newparam;
1785 /* only pass IA5 number space */
1786 if (digit > 126 || digit < 32)
1789 ast_mutex_lock(&chan_lock);
1790 call = ast->tech_pvt;
1792 CERROR(NULL, ast, "Received digit from Asterisk, but no call instance exists.\n");
1793 ast_mutex_unlock(&chan_lock);
1797 CDEBUG(call, ast, "Received digit '%c' from Asterisk.\n", digit);
1799 /* send information or queue them */
1800 if (call->ref && call->state == CHAN_LCR_STATE_OUT_DIALING)
1802 CDEBUG(call, ast, "Sending digit to LCR, because we are in dialing state.\n");
1803 memset(&newparam, 0, sizeof(union parameter));
1804 newparam.information.id[0] = digit;
1805 newparam.information.id[1] = '\0';
1806 send_message(MESSAGE_INFORMATION, call->ref, &newparam);
1809 && (call->state == CHAN_LCR_STATE_OUT_PREPARE || call->state == CHAN_LCR_STATE_OUT_SETUP))
1811 CDEBUG(call, ast, "Queue digits, because we are in setup/dialing state and have no ref yet.\n");
1813 strncat(call->dialque, buf, strlen(call->dialque)-1);
1816 ast_mutex_unlock(&chan_lock);
1820 static int lcr_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
1822 printf("DIGIT END %c\n", digit);
1826 static int lcr_answer(struct ast_channel *ast)
1828 union parameter newparam;
1829 struct chan_call *call;
1831 ast_mutex_lock(&chan_lock);
1832 call = ast->tech_pvt;
1834 CERROR(NULL, ast, "Received answer from Asterisk, but no call instance exists.\n");
1835 ast_mutex_unlock(&chan_lock);
1839 CDEBUG(call, ast, "Received answer from Asterisk (maybe during lcr_bridge).\n");
1841 /* copy connectinfo, if bridged */
1842 if (call->bridge_call)
1843 memcpy(&call->connectinfo, &call->bridge_call->connectinfo, sizeof(struct connect_info));
1844 /* send connect message to lcr */
1845 if (call->state != CHAN_LCR_STATE_CONNECT) {
1846 memset(&newparam, 0, sizeof(union parameter));
1847 memcpy(&newparam.connectinfo, &call->connectinfo, sizeof(struct connect_info));
1848 send_message(MESSAGE_CONNECT, call->ref, &newparam);
1849 call->state = CHAN_LCR_STATE_CONNECT;
1852 /* request bchannel */
1853 if (!call->bchannel) {
1854 CDEBUG(call, ast, "Requesting B-channel.\n");
1855 memset(&newparam, 0, sizeof(union parameter));
1856 newparam.bchannel.type = BCHANNEL_REQUEST;
1857 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
1860 // memset(&newparam, 0, sizeof(union parameter));
1861 // send_message(MESSAGE_ENABLEKEYPAD, call->ref, &newparam);
1864 CDEBUG(call, ast, "DTMF is disabled by option.\n");
1868 ast_mutex_unlock(&chan_lock);
1872 static int lcr_hangup(struct ast_channel *ast)
1874 struct chan_call *call;
1875 pthread_t tid = pthread_self();
1877 if (!pthread_equal(tid, chan_tid))
1878 ast_mutex_lock(&chan_lock);
1879 call = ast->tech_pvt;
1881 CERROR(NULL, ast, "Received hangup from Asterisk, but no call instance exists.\n");
1882 if (!pthread_equal(tid, chan_tid))
1883 ast_mutex_unlock(&chan_lock);
1887 if (!pthread_equal(tid, chan_tid))
1888 CDEBUG(call, ast, "Received hangup from Asterisk thread.\n");
1890 CDEBUG(call, ast, "Received hangup from LCR thread.\n");
1892 /* disconnect asterisk, maybe not required */
1893 ast->tech_pvt = NULL;
1898 CDEBUG(call, ast, "Releasing ref and freeing call instance.\n");
1899 if (ast->hangupcause > 0)
1900 send_release_and_import(call, ast->hangupcause, LOCATION_PRIVATE_LOCAL);
1902 send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
1905 if (!pthread_equal(tid, chan_tid))
1906 ast_mutex_unlock(&chan_lock);
1910 /* ref is not set, due to prepare setup or release */
1911 if (call->state == CHAN_LCR_STATE_RELEASE)
1913 /* we get the response to our release */
1914 CDEBUG(call, ast, "Freeing call instance, because we have no ref AND we are requesting no ref.\n");
1918 /* during prepare, we change to release state */
1919 CDEBUG(call, ast, "We must wait until we received our ref, until we can free call instance.\n");
1920 call->state = CHAN_LCR_STATE_RELEASE;
1923 if (!pthread_equal(tid, chan_tid))
1924 ast_mutex_unlock(&chan_lock);
1928 static int lcr_write(struct ast_channel *ast, struct ast_frame *f)
1930 struct chan_call *call;
1933 CDEBUG(NULL, ast, "No subclass\n");
1934 if (!(f->subclass & ast->nativeformats))
1935 CDEBUG(NULL, ast, "Unexpected format.\n");
1937 ast_mutex_lock(&chan_lock);
1938 call = ast->tech_pvt;
1940 ast_mutex_unlock(&chan_lock);
1943 if (call->bchannel && f->samples)
1944 bchannel_transmit(call->bchannel, f->data, f->samples);
1945 ast_mutex_unlock(&chan_lock);
1950 static struct ast_frame *lcr_read(struct ast_channel *ast)
1952 struct chan_call *call;
1955 ast_mutex_lock(&chan_lock);
1956 call = ast->tech_pvt;
1958 ast_mutex_unlock(&chan_lock);
1961 if (call->pipe[0] > -1) {
1962 if (call->rebuffer && !call->hdlc) {
1963 len = read(call->pipe[0], call->read_buff, 160);
1965 len = read(call->pipe[0], call->read_buff, sizeof(call->read_buff));
1967 if (len < 0 && errno == EAGAIN) {
1968 ast_mutex_unlock(&chan_lock);
1969 return &ast_null_frame;
1972 close(call->pipe[0]);
1974 ast_mutex_unlock(&chan_lock);
1979 call->read_fr.frametype = AST_FRAME_VOICE;
1980 call->read_fr.subclass = ast->nativeformats;
1981 call->read_fr.datalen = len;
1982 call->read_fr.samples = len;
1983 call->read_fr.delivery = ast_tv(0,0);
1984 call->read_fr.data = call->read_buff;
1985 ast_mutex_unlock(&chan_lock);
1987 return &call->read_fr;
1990 static int lcr_indicate(struct ast_channel *ast, int cond, const void *data, size_t datalen)
1992 union parameter newparam;
1994 struct chan_call *call;
1996 ast_mutex_lock(&chan_lock);
1997 call = ast->tech_pvt;
1999 CERROR(NULL, ast, "Received indicate from Asterisk, but no call instance exists.\n");
2000 ast_mutex_unlock(&chan_lock);
2005 case AST_CONTROL_BUSY:
2006 CDEBUG(call, ast, "Received indicate AST_CONTROL_BUSY from Asterisk.\n");
2007 ast_setstate(ast, AST_STATE_BUSY);
2008 if (call->state != CHAN_LCR_STATE_OUT_DISCONNECT) {
2009 /* send message to lcr */
2010 memset(&newparam, 0, sizeof(union parameter));
2011 newparam.disconnectinfo.cause = 17;
2012 newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
2013 send_message(MESSAGE_DISCONNECT, call->ref, &newparam);
2015 call->state = CHAN_LCR_STATE_OUT_DISCONNECT;
2018 case AST_CONTROL_CONGESTION:
2019 CDEBUG(call, ast, "Received indicate AST_CONTROL_CONGESTION from Asterisk. (cause %d)\n", ast->hangupcause);
2020 if (call->state != CHAN_LCR_STATE_OUT_DISCONNECT) {
2021 /* send message to lcr */
2022 memset(&newparam, 0, sizeof(union parameter));
2023 newparam.disconnectinfo.cause = ast->hangupcause;
2024 newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
2025 send_message(MESSAGE_DISCONNECT, call->ref, &newparam);
2027 call->state = CHAN_LCR_STATE_OUT_DISCONNECT;
2030 case AST_CONTROL_PROCEEDING:
2031 CDEBUG(call, ast, "Received indicate AST_CONTROL_PROCEEDING from Asterisk.\n");
2032 if (call->state == CHAN_LCR_STATE_IN_SETUP
2033 || call->state == CHAN_LCR_STATE_IN_DIALING) {
2034 /* send message to lcr */
2035 memset(&newparam, 0, sizeof(union parameter));
2036 send_message(MESSAGE_PROCEEDING, call->ref, &newparam);
2038 call->state = CHAN_LCR_STATE_IN_PROCEEDING;
2041 case AST_CONTROL_RINGING:
2042 CDEBUG(call, ast, "Received indicate AST_CONTROL_RINGING from Asterisk.\n");
2043 ast_setstate(ast, AST_STATE_RINGING);
2044 if (call->state == CHAN_LCR_STATE_IN_SETUP
2045 || call->state == CHAN_LCR_STATE_IN_DIALING
2046 || call->state == CHAN_LCR_STATE_IN_PROCEEDING) {
2047 /* send message to lcr */
2048 memset(&newparam, 0, sizeof(union parameter));
2049 send_message(MESSAGE_ALERTING, call->ref, &newparam);
2051 call->state = CHAN_LCR_STATE_IN_ALERTING;
2055 CDEBUG(call, ast, "Received indicate -1.\n");
2059 case AST_CONTROL_VIDUPDATE:
2060 CDEBUG(call, ast, "Received indicate AST_CONTROL_VIDUPDATE.\n");
2063 case AST_CONTROL_HOLD:
2064 CDEBUG(call, ast, "Received indicate AST_CONTROL_HOLD from Asterisk.\n");
2065 /* send message to lcr */
2066 memset(&newparam, 0, sizeof(union parameter));
2067 newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_HOLD;
2068 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
2070 /*start music onhold*/
2071 ast_moh_start(ast,data,ast->musicclass);
2073 case AST_CONTROL_UNHOLD:
2074 CDEBUG(call, ast, "Received indicate AST_CONTROL_UNHOLD from Asterisk.\n");
2075 /* send message to lcr */
2076 memset(&newparam, 0, sizeof(union parameter));
2077 newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
2078 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
2085 CERROR(call, ast, "Received indicate from Asterisk with unknown condition %d.\n", cond);
2091 ast_mutex_unlock(&chan_lock);
2098 static int lcr_fixup(struct ast_channel *oldast, struct ast_channel *ast)
2100 struct chan_call *call;
2106 ast_mutex_lock(&chan_lock);
2107 call = ast->tech_pvt;
2109 CERROR(NULL, ast, "Received fixup from Asterisk, but no call instance exists.\n");
2110 ast_mutex_unlock(&chan_lock);
2114 CDEBUG(call, ast, "Received fixup from Asterisk.\n");
2116 ast_mutex_unlock(&chan_lock);
2121 * send_text asterisk
2123 static int lcr_send_text(struct ast_channel *ast, const char *text)
2125 struct chan_call *call;
2126 union parameter newparam;
2128 ast_mutex_lock(&chan_lock);
2129 call = ast->tech_pvt;
2131 CERROR(NULL, ast, "Received send_text from Asterisk, but no call instance exists.\n");
2132 ast_mutex_unlock(&chan_lock);
2136 CDEBUG(call, ast, "Received send_text from Asterisk. (text=%s)\n", text);
2137 memset(&newparam, 0, sizeof(union parameter));
2138 strncpy(newparam.notifyinfo.display, text, sizeof(newparam.notifyinfo.display)-1);
2139 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
2140 ast_mutex_lock(&chan_lock);
2147 enum ast_bridge_result lcr_bridge(struct ast_channel *ast1,
2148 struct ast_channel *ast2, int flags,
2149 struct ast_frame **fo,
2150 struct ast_channel **rc, int timeoutms)
2153 struct chan_call *call1, *call2;
2154 struct ast_channel *carr[2], *who;
2156 struct ast_frame *f;
2159 CDEBUG(NULL, NULL, "Received briding request from Asterisk.\n");
2164 /* join via dsp (if the channels are currently open) */
2165 ast_mutex_lock(&chan_lock);
2166 call1 = ast1->tech_pvt;
2167 call2 = ast2->tech_pvt;
2168 if (!call1 || !call2) {
2169 CDEBUG(NULL, NULL, "Bridge, but we don't have two call instances, exitting.\n");
2170 ast_mutex_unlock(&chan_lock);
2171 return AST_BRIDGE_COMPLETE;
2174 /* join, if both call instances uses dsp */
2175 if (!call1->nodsp && !call2->nodsp) {
2176 CDEBUG(NULL, NULL, "Both calls use DSP, briding via DSP.\n");
2178 /* get bridge id and join */
2179 bridge_id = new_bridge_id();
2181 call1->bridge_id = bridge_id;
2182 if (call1->bchannel)
2183 bchannel_join(call1->bchannel, bridge_id);
2185 call2->bridge_id = bridge_id;
2186 if (call2->bchannel)
2187 bchannel_join(call2->bchannel, bridge_id);
2189 if (call1->nodsp && call2->nodsp)
2190 CDEBUG(NULL, NULL, "Both calls use no DSP, briding in channel driver.\n");
2192 CDEBUG(NULL, NULL, "One call uses no DSP, briding in channel driver.\n");
2193 call1->bridge_call = call2;
2194 call2->bridge_call = call1;
2196 if (call1->state == CHAN_LCR_STATE_IN_SETUP
2197 || call1->state == CHAN_LCR_STATE_IN_DIALING
2198 || call1->state == CHAN_LCR_STATE_IN_PROCEEDING
2199 || call1->state == CHAN_LCR_STATE_IN_ALERTING) {
2200 CDEBUG(call1, ast1, "Bridge established before lcr_answer, so we call it ourself: Calling lcr_answer...\n");
2203 if (call2->state == CHAN_LCR_STATE_IN_SETUP
2204 || call2->state == CHAN_LCR_STATE_IN_DIALING
2205 || call2->state == CHAN_LCR_STATE_IN_PROCEEDING
2206 || call2->state == CHAN_LCR_STATE_IN_ALERTING) {
2207 CDEBUG(call2, ast2, "Bridge established before lcr_answer, so we call it ourself: Calling lcr_answer...\n");
2211 ast_mutex_unlock(&chan_lock);
2215 who = ast_waitfor_n(carr, 2, &to);
2218 CDEBUG(NULL, NULL, "Empty read on bridge, breaking out.\n");
2223 if (!f || f->frametype == AST_FRAME_CONTROL) {
2225 CDEBUG(NULL, NULL, "Got hangup.\n");
2227 CDEBUG(NULL, NULL, "Got CONTROL.\n");
2234 if ( f->frametype == AST_FRAME_DTMF ) {
2235 CDEBUG(NULL, NULL, "Got DTMF.\n");
2251 CDEBUG(NULL, NULL, "Releasing bride.\n");
2253 /* split channels */
2254 ast_mutex_lock(&chan_lock);
2255 call1 = ast1->tech_pvt;
2256 call2 = ast2->tech_pvt;
2257 if (call1 && call1->bridge_id)
2259 call1->bridge_id = 0;
2260 if (call1->bchannel)
2261 bchannel_join(call1->bchannel, 0);
2262 if (call1->bridge_call)
2263 call1->bridge_call->bridge_call = NULL;
2265 if (call2 && call1->bridge_id)
2267 call2->bridge_id = 0;
2268 if (call2->bchannel)
2269 bchannel_join(call2->bchannel, 0);
2270 if (call2->bridge_call)
2271 call2->bridge_call->bridge_call = NULL;
2273 call1->bridge_call = NULL;
2274 call2->bridge_call = NULL;
2276 ast_mutex_unlock(&chan_lock);
2277 return AST_BRIDGE_COMPLETE;
2279 static struct ast_channel_tech lcr_tech = {
2281 .description="Channel driver for connecting to Linux-Call-Router",
2282 .requester=lcr_request,
2283 .send_digit_begin=lcr_digit_begin,
2284 .send_digit_end=lcr_digit_end,
2291 .indicate=lcr_indicate,
2293 .send_text=lcr_send_text,
2302 static int lcr_show_lcr (int fd, int argc, char *argv[])
2307 static int lcr_show_calls (int fd, int argc, char *argv[])
2312 static int lcr_reload_routing (int fd, int argc, char *argv[])
2317 static int lcr_reload_interfaces (int fd, int argc, char *argv[])
2322 static int lcr_port_block (int fd, int argc, char *argv[])
2327 static int lcr_port_unblock (int fd, int argc, char *argv[])
2332 static int lcr_port_unload (int fd, int argc, char *argv[])
2337 static struct ast_cli_entry cli_show_lcr =
2338 { {"lcr", "show", "lcr", NULL},
2340 "Shows current states of LCR core",
2341 "Usage: lcr show lcr\n",
2344 static struct ast_cli_entry cli_show_calls =
2345 { {"lcr", "show", "calls", NULL},
2347 "Shows current calls made by LCR and Asterisk",
2348 "Usage: lcr show calls\n",
2351 static struct ast_cli_entry cli_reload_routing =
2352 { {"lcr", "reload", "routing", NULL},
2354 "Reloads routing conf of LCR, current uncomplete calls will be disconnected",
2355 "Usage: lcr reload routing\n",
2358 static struct ast_cli_entry cli_reload_interfaces =
2359 { {"lcr", "reload", "interfaces", NULL},
2360 lcr_reload_interfaces,
2361 "Reloads interfaces conf of LCR",
2362 "Usage: lcr reload interfaces\n",
2365 static struct ast_cli_entry cli_port_block =
2366 { {"lcr", "port", "block", NULL},
2368 "Blocks LCR port for further calls",
2369 "Usage: lcr port block \"<port>\"\n",
2372 static struct ast_cli_entry cli_port_unblock =
2373 { {"lcr", "port", "unblock", NULL},
2375 "Unblocks or loads LCR port, port is opened my mISDN",
2376 "Usage: lcr port unblock \"<port>\"\n",
2379 static struct ast_cli_entry cli_port_unload =
2380 { {"lcr", "port", "unload", NULL},
2382 "Unloads LCR port, port is closes by mISDN",
2383 "Usage: lcr port unload \"<port>\"\n",
2389 static int lcr_config_exec(struct ast_channel *ast, void *data)
2391 struct chan_call *call;
2393 ast_mutex_lock(&chan_lock);
2394 CDEBUG(NULL, ast, "Received lcr_config (data=%s)\n", (char *)data);
2398 if (call->ast == ast)
2403 apply_opt(call, (char *)data);
2405 CERROR(NULL, ast, "lcr_config app not called by chan_lcr channel.\n");
2407 ast_mutex_unlock(&chan_lock);
2412 * module loading and destruction
2414 int load_module(void)
2418 for (i = 0; i < 256; i++) {
2419 flip_bits[i] = (i>>7) | ((i>>5)&2) | ((i>>3)&4) | ((i>>1)&8)
2420 | (i<<7) | ((i&2)<<5) | ((i&4)<<3) | ((i&8)<<1);
2423 if (read_options() == 0) {
2424 CERROR(NULL, NULL, "%s", options_error);
2425 return AST_MODULE_LOAD_DECLINE;
2428 ast_mutex_init(&chan_lock);
2429 ast_mutex_init(&log_lock);
2431 if (open_socket() < 0) {
2432 /* continue with closed socket */
2435 if (bchannel_initialize()) {
2436 CERROR(NULL, NULL, "Unable to open mISDN device\n");
2438 return AST_MODULE_LOAD_DECLINE;
2442 lcr_tech.capabilities = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
2443 if (ast_channel_register(&lcr_tech)) {
2444 CERROR(NULL, NULL, "Unable to register channel class\n");
2445 bchannel_deinitialize();
2447 return AST_MODULE_LOAD_DECLINE;
2450 ast_register_application("lcr_config", lcr_config_exec, "lcr_config",
2451 "lcr_config(<opt><optarg>:<opt>:...)\n"
2452 "Sets LCR opts. and optargs\n"
2454 "The available options are:\n"
2455 " d - Send display text on called phone, text is the optarg.\n"
2456 " n - Don't detect dtmf tones on called channel.\n"
2457 " h - Force data call (HDLC).\n"
2458 " t - Disable mISDN_dsp features (required for fax application).\n"
2459 " c - Make crypted outgoing call, optarg is keyindex.\n"
2460 " e - Perform echo cancelation on this channel.\n"
2461 " Takes mISDN pipeline option as optarg.\n"
2462 // " s - Send Non Inband DTMF as inband.\n"
2463 " vr - rxgain control\n"
2464 " vt - txgain control\n"
2465 " Volume changes at factor 2 ^ optarg.\n"
2470 ast_cli_register(&cli_show_lcr);
2471 ast_cli_register(&cli_show_calls);
2472 ast_cli_register(&cli_reload_routing);
2473 ast_cli_register(&cli_reload_interfaces);
2474 ast_cli_register(&cli_port_block);
2475 ast_cli_register(&cli_port_unblock);
2476 ast_cli_register(&cli_port_unload);
2480 if ((pthread_create(&chan_tid, NULL, chan_thread, NULL)<0))
2482 /* failed to create thread */
2483 bchannel_deinitialize();
2485 ast_channel_unregister(&lcr_tech);
2486 return AST_MODULE_LOAD_DECLINE;
2491 int unload_module(void)
2493 /* First, take us out of the channel loop */
2494 CDEBUG(NULL, NULL, "-- Unregistering mISDN Channel Driver --\n");
2497 pthread_join(chan_tid, NULL);
2499 ast_channel_unregister(&lcr_tech);
2501 ast_unregister_application("lcr_config");
2504 if (mISDN_created) {
2505 bchannel_deinitialize();
2509 if (lcr_sock >= 0) {
2517 int reload_module(void)
2524 #define AST_MODULE "chan_lcr"
2526 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Channel driver for Linux-Call-Router Support (ISDN BRI/PRI)",
2527 .load = load_module,
2528 .unload = unload_module,
2529 .reload = reload_module,