+ int cause, ret;
+ union parameter newparam;
+ char *exten = ast->exten;
+ if (!*exten)
+ exten = "s";
+
+ CDEBUG(call, ast, "Try to start pbx. (exten=%s context=%s complete=%s)\n", exten, ast->context, complete?"yes":"no");
+
+ if (complete) {
+ /* if not match */
+ if (!ast_canmatch_extension(ast, ast->context, exten, 1, call->oad)) {
+ CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at context '%s' - releasing.\n", exten, ast->context);
+ cause = 1;
+ goto release;
+ }
+ if (!ast_exists_extension(ast, ast->context, exten, 1, call->oad)) {
+ CDEBUG(call, ast, "Got 'sending complete', but extension '%s' would match at context '%s', if more digits would be dialed - releasing.\n", exten, ast->context);
+ cause = 28;
+ goto release;
+ }
+ CDEBUG(call, ast, "Got 'sending complete', extensions matches.\n");
+ /* send setup acknowledge to lcr */
+ memset(&newparam, 0, sizeof(union parameter));
+ send_message(MESSAGE_PROCEEDING, call->ref, &newparam);
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_IN_PROCEEDING;
+
+ goto start;
+ }
+
+ if (ast_canmatch_extension(ast, ast->context, exten, 1, call->oad)) {
+ /* send setup acknowledge to lcr */
+ if (call->state != CHAN_LCR_STATE_IN_DIALING) {
+ memset(&newparam, 0, sizeof(union parameter));
+ send_message(MESSAGE_OVERLAP, call->ref, &newparam);
+ }
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_IN_DIALING;
+
+ /* if match, start pbx */
+ if (ast_exists_extension(ast, ast->context, exten, 1, call->oad)) {
+ CDEBUG(call, ast, "Extensions matches.\n");
+ goto start;
+ }
+
+ /* if can match */
+ CDEBUG(call, ast, "Extensions may match, if more digits are dialed.\n");
+ return;
+ }
+
+ if (!*ast->exten) {
+ /* if can match */
+ CDEBUG(call, ast, "There is no 's' extension (and we tried to match it implicitly). Extensions may match, if more digits are dialed.\n");
+ return;
+ }
+
+ /* if not match */
+ cause = 1;
+ release:
+ /* release lcr */
+ CDEBUG(call, ast, "Releasing due to extension missmatch.\n");
+ send_release_and_import(call, cause, LOCATION_PRIVATE_LOCAL);
+ call->ref = 0;
+ /* release asterisk */
+ ast->hangupcause = call->cause;
+ /* change to release state */
+ call->state = CHAN_LCR_STATE_RELEASE;
+ ast_hangup(ast); // call will be destroyed here
+ return;
+
+ start:
+ /* send setup to asterisk */
+ CDEBUG(call, ast, "Starting call to Asterisk due to matching extension.\n");
+
+ #ifdef LCR_FOR_CALLWEAVER
+ ast->type = "LCR";
+ snprintf(ast->name, sizeof(ast->name), "LCR/%s-%04x",ast->cid.cid_num, ast_random() & 0xffff);
+ #endif
+
+ ret = ast_pbx_start(ast);
+ if (ret < 0) {
+ cause = (ret==-2)?34:27;
+ goto release;
+ }
+ call->pbx_started = 1;
+ ast_setstate(ast, AST_STATE_RING);
+}
+
+/*
+ * incoming setup from LCR
+ */
+static void lcr_in_setup(struct chan_call *call, int message_type, union parameter *param)
+{
+ struct ast_channel *ast;
+
+ CDEBUG(call, NULL, "Incomming setup from LCR. (callerid %s, dialing %s)\n", param->setup.callerinfo.id, param->setup.dialinginfo.id);
+
+ /* create asterisk channel instrance */
+
+ #ifdef LCR_FOR_CALLWEAVER
+ ast = ast_channel_alloc(1);
+ #endif
+
+ #ifdef LCR_FOR_ASTERISK
+ ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel);
+ #endif
+
+ if (!ast) {
+ /* release */
+ CERROR(call, NULL, "Failed to create Asterisk channel - releasing.\n");
+ send_release_and_import(call, CAUSE_RESSOURCEUNAVAIL, LOCATION_PRIVATE_LOCAL);
+ /* remove call */
+ free_call(call);
+ return;
+ }
+ /* link together */
+ call->ast = ast;
+ ast->tech_pvt = call;
+ ast->tech = &lcr_tech;
+ ast->fds[0] = call->pipe[0];
+
+ /* fill setup information */
+ if (param->setup.dialinginfo.id)
+ strncpy(ast->exten, param->setup.dialinginfo.id, AST_MAX_EXTENSION-1);
+ if (param->setup.context[0])
+ strncpy(ast->context, param->setup.context, AST_MAX_CONTEXT-1);
+ else
+ strncpy(ast->context, param->setup.callerinfo.interface, AST_MAX_CONTEXT-1);
+ if (param->setup.callerinfo.id[0])
+ ast->cid.cid_num = strdup(param->setup.callerinfo.id);
+ if (param->setup.callerinfo.name[0])
+ ast->cid.cid_name = strdup(param->setup.callerinfo.name);
+ if (param->setup.redirinfo.id[0])
+ ast->cid.cid_name = strdup(numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international));
+ switch (param->setup.callerinfo.present) {
+ case INFO_PRESENT_ALLOWED:
+ ast->cid.cid_pres = AST_PRES_ALLOWED;
+ break;
+ case INFO_PRESENT_RESTRICTED:
+ ast->cid.cid_pres = AST_PRES_RESTRICTED;
+ break;
+ default:
+ ast->cid.cid_pres = AST_PRES_UNAVAILABLE;
+ }
+ switch (param->setup.callerinfo.ntype) {
+ case INFO_NTYPE_SUBSCRIBER:
+ ast->cid.cid_ton = 4;
+ break;
+ case INFO_NTYPE_NATIONAL:
+ ast->cid.cid_ton = 2;
+ break;
+ case INFO_NTYPE_INTERNATIONAL:
+ ast->cid.cid_ton = 1;
+ break;
+ default:
+ ast->cid.cid_ton = 0;
+ }
+ ast->transfercapability = param->setup.capainfo.bearer_capa;
+ /* enable hdlc if transcap is data */
+ if (param->setup.capainfo.source_mode == B_MODE_HDLC)
+ call->hdlc = 1;
+ strncpy(call->oad, numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international), sizeof(call->oad)-1);
+
+ /* configure channel */
+ ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
+ ast->readformat = ast->rawreadformat = ast->nativeformats;
+ ast->writeformat = ast->rawwriteformat = ast->nativeformats;
+ ast->priority = 1;
+ ast->hangupcause = 0;
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_IN_SETUP;
+
+ if (!call->pbx_started)
+ lcr_start_pbx(call, ast, param->setup.dialinginfo.sending_complete);
+}
+
+/*
+ * incoming setup acknowledge from LCR
+ */
+static void lcr_in_overlap(struct chan_call *call, int message_type, union parameter *param)
+{
+ if (!call->ast) return;
+
+ CDEBUG(call, call->ast, "Incomming setup acknowledge from LCR.\n");
+
+ /* send pending digits in dialque */
+ if (call->dialque[0])
+ send_dialque_to_lcr(call);
+ /* change to overlap state */
+ call->state = CHAN_LCR_STATE_OUT_DIALING;
+}
+
+/*
+ * incoming proceeding from LCR
+ */
+static void lcr_in_proceeding(struct chan_call *call, int message_type, union parameter *param)
+{
+ CDEBUG(call, call->ast, "Incomming proceeding from LCR.\n");
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_OUT_PROCEEDING;
+ /* queue event for asterisk */
+ if (call->ast && call->pbx_started) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strncat(call->queue_string, "P", sizeof(call->queue_string)-1);
+ }
+
+}
+
+/*
+ * incoming alerting from LCR
+ */
+static void lcr_in_alerting(struct chan_call *call, int message_type, union parameter *param)
+{
+ CDEBUG(call, call->ast, "Incomming alerting from LCR.\n");
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_OUT_ALERTING;
+ /* queue event to asterisk */
+ if (call->ast && call->pbx_started) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strncat(call->queue_string, "R", sizeof(call->queue_string)-1);
+ }
+}
+
+/*
+ * incoming connect from LCR
+ */
+static void lcr_in_connect(struct chan_call *call, int message_type, union parameter *param)
+{
+ union parameter newparam;
+
+ CDEBUG(call, call->ast, "Incomming connect (answer) from LCR.\n");
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_CONNECT;
+ /* request bchannel */
+ if (!call->bchannel) {
+ CDEBUG(call, call->ast, "Requesting B-channel.\n");
+ memset(&newparam, 0, sizeof(union parameter));
+ newparam.bchannel.type = BCHANNEL_REQUEST;
+ send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
+ }
+ /* copy connectinfo */
+ memcpy(&call->connectinfo, ¶m->connectinfo, sizeof(struct connect_info));
+ /* queue event to asterisk */
+ if (call->ast && call->pbx_started) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strncat(call->queue_string, "N", sizeof(call->queue_string)-1);
+ }
+}
+
+/*
+ * incoming disconnect from LCR
+ */
+static void lcr_in_disconnect(struct chan_call *call, int message_type, union parameter *param)
+{
+ struct ast_channel *ast = call->ast;
+
+ CDEBUG(call, call->ast, "Incomming disconnect from LCR. (cause=%d)\n", param->disconnectinfo.cause);
+
+ /* change state */
+ call->state = CHAN_LCR_STATE_IN_DISCONNECT;
+ /* save cause */
+ call->cause = param->disconnectinfo.cause;
+ call->location = param->disconnectinfo.location;
+ /* if bridge, forward disconnect and return */
+#ifdef TODO
+ feature flag
+ if (call->bridge_call) {
+ CDEBUG(call, call->ast, "Only signal disconnect via bridge.\n");
+ bridge_message_if_bridged(call, message_type, param);
+ return;
+ }
+#endif
+ /* release lcr with same cause */
+ send_release_and_import(call, call->cause, call->location);
+ call->ref = 0;
+ /* change to release state */
+ call->state = CHAN_LCR_STATE_RELEASE;
+ /* queue release asterisk */
+ if (ast) {
+ ast->hangupcause = call->cause;
+ if (call->pbx_started) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strcpy(call->queue_string, "H"); // overwrite other indications
+ } else {
+ ast_hangup(ast); // call will be destroyed here
+ }
+ }
+}
+
+/*
+ * incoming release from LCR
+ */
+static void lcr_in_release(struct chan_call *call, int message_type, union parameter *param)
+{
+ struct ast_channel *ast = call->ast;
+
+ CDEBUG(call, call->ast, "Incomming release from LCR, releasing ref. (cause=%d)\n", param->disconnectinfo.cause);
+
+ /* release ref */
+ call->ref = 0;
+ /* change to release state */
+ call->state = CHAN_LCR_STATE_RELEASE;
+ /* copy release info */
+ if (!call->cause) {
+ call->cause = param->disconnectinfo.cause;
+ call->location = param->disconnectinfo.location;
+ }
+ /* if we have an asterisk instance, queue hangup, else we are done */
+ if (ast) {
+ ast->hangupcause = call->cause;
+ if (call->pbx_started) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strcpy(call->queue_string, "H");
+ } else {
+ ast_hangup(ast); // call will be destroyed here
+ }
+ } else {
+ free_call(call);
+ }
+
+}
+
+/*
+ * incoming information from LCR
+ */
+static void lcr_in_information(struct chan_call *call, int message_type, union parameter *param)
+{
+ struct ast_channel *ast = call->ast;
+
+ CDEBUG(call, call->ast, "Incoming information from LCR. (dialing=%s)\n", param->information.id);
+
+ if (!ast) return;
+
+ /* pbx not started */
+ if (!call->pbx_started) {
+ CDEBUG(call, call->ast, "Asterisk not started, adding digits to number.\n");
+ strncat(ast->exten, param->information.id, AST_MAX_EXTENSION-1);
+ lcr_start_pbx(call, ast, param->information.sending_complete);
+ return;
+ }
+
+ /* change dailing state after setup */
+ if (call->state == CHAN_LCR_STATE_IN_SETUP) {
+ CDEBUG(call, call->ast, "Changing from SETUP to DIALING state.\n");
+ call->state = CHAN_LCR_STATE_IN_DIALING;
+// ast_setstate(ast, AST_STATE_DIALING);
+ }
+
+ /* queue digits */
+ if (call->state == CHAN_LCR_STATE_IN_DIALING && param->information.id[0]) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strncat(call->queue_string, param->information.id, sizeof(call->queue_string)-1);
+ }
+
+ /* use bridge to forware message not supported by asterisk */
+ if (call->state == CHAN_LCR_STATE_CONNECT) {
+ CDEBUG(call, call->ast, "Call is connected, bridging.\n");
+ bridge_message_if_bridged(call, message_type, param);
+ }
+}
+
+/*
+ * incoming information from LCR
+ */
+static void lcr_in_notify(struct chan_call *call, int message_type, union parameter *param)
+{
+ union parameter newparam;
+
+ CDEBUG(call, call->ast, "Incomming notify from LCR. (notify=%d)\n", param->notifyinfo.notify);
+
+ /* request bchannel, if call is resumed and we don't have it */
+ if (param->notifyinfo.notify == INFO_NOTIFY_USER_RESUMED && !call->bchannel && call->ref) {
+ CDEBUG(call, call->ast, "Reqesting bchannel at resume.\n");
+ memset(&newparam, 0, sizeof(union parameter));
+ newparam.bchannel.type = BCHANNEL_REQUEST;
+ send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
+ }
+
+ if (!call->ast) return;
+
+ /* use bridge to forware message not supported by asterisk */
+ bridge_message_if_bridged(call, message_type, param);
+}
+
+/*
+ * incoming information from LCR
+ */
+static void lcr_in_facility(struct chan_call *call, int message_type, union parameter *param)
+{
+ CDEBUG(call, call->ast, "Incomming facility from LCR.\n");
+
+ if (!call->ast) return;
+
+ /* use bridge to forware message not supported by asterisk */
+ bridge_message_if_bridged(call, message_type, param);
+}
+
+/*
+ * incoming pattern from LCR
+ */
+static void lcr_in_pattern(struct chan_call *call, int message_type, union parameter *param)
+{
+ union parameter newparam;
+
+ CDEBUG(call, call->ast, "Incomming pattern indication from LCR.\n");
+
+ if (!call->ast) return;
+
+ /* pattern are indicated only once */
+ if (call->has_pattern)
+ return;
+ call->has_pattern = 1;
+
+ /* request bchannel */
+ if (!call->bchannel) {
+ CDEBUG(call, call->ast, "Requesting B-channel.\n");
+ memset(&newparam, 0, sizeof(union parameter));
+ newparam.bchannel.type = BCHANNEL_REQUEST;
+ send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
+ }
+ /* queue PROGRESS, because tones are available */
+ if (call->ast && call->pbx_started) {
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strncat(call->queue_string, "T", sizeof(call->queue_string)-1);
+ }
+}
+
+/*
+ * got dtmf from bchannel (locked state)
+ */
+void lcr_in_dtmf(struct chan_call *call, int val)
+{
+ struct ast_channel *ast = call->ast;
+ char digit[2];
+
+ if (!ast)
+ return;
+ if (!call->pbx_started)
+ return;
+
+ if (!call->dsp_dtmf) {
+ CDEBUG(call, call->ast, "Recognised DTMF digit '%c', but ignoring. This is fixed in later mISDN driver.\n", val);
+ return;
+ }
+
+ CDEBUG(call, call->ast, "Recognised DTMF digit '%c'.\n", val);
+ digit[0] = val;
+ digit[1] = '\0';
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strncat(call->queue_string, digit, sizeof(call->queue_string)-1);
+}
+
+/*
+ * message received from LCR
+ */
+int receive_message(int message_type, unsigned int ref, union parameter *param)
+{
+ struct bchannel *bchannel;
+ struct chan_call *call;
+ union parameter newparam;
+
+ memset(&newparam, 0, sizeof(union parameter));
+
+ /* handle bchannel message*/
+ if (message_type == MESSAGE_BCHANNEL) {
+ switch(param->bchannel.type) {
+ case BCHANNEL_ASSIGN:
+ CDEBUG(NULL, NULL, "Received BCHANNEL_ASSIGN message. (handle=%08lx) for ref %d\n", param->bchannel.handle, ref);
+ if ((bchannel = find_bchannel_handle(param->bchannel.handle))) {
+ CERROR(NULL, NULL, "bchannel handle %x already assigned.\n", (int)param->bchannel.handle);
+ return -1;
+ }
+ /* create bchannel */
+ bchannel = alloc_bchannel(param->bchannel.handle);
+ if (!bchannel) {
+ CERROR(NULL, NULL, "alloc bchannel handle %x failed.\n", (int)param->bchannel.handle);
+ return -1;
+ }
+
+ /* configure channel */
+ bchannel->b_tx_gain = param->bchannel.tx_gain;
+ bchannel->b_rx_gain = param->bchannel.rx_gain;
+ strncpy(bchannel->b_pipeline, param->bchannel.pipeline, sizeof(bchannel->b_pipeline)-1);
+ if (param->bchannel.crypt_len && param->bchannel.crypt_len <= sizeof(bchannel->b_bf_key)) {
+ bchannel->b_bf_len = param->bchannel.crypt_len;
+ memcpy(bchannel->b_bf_key, param->bchannel.crypt, param->bchannel.crypt_len);
+ }
+ bchannel->b_txdata = 0;
+ bchannel->b_tx_dejitter = 1;
+
+ /* in case, ref is not set, this bchannel instance must
+ * be created until it is removed again by LCR */
+ /* link to call */
+ call = find_call_ref(ref);
+ if (call) {
+ bchannel->call = call;
+ call->bchannel = bchannel;
+ if (call->dsp_dtmf)
+ bchannel_dtmf(bchannel, 1);
+ if (call->bf_len)
+ bchannel_blowfish(bchannel, call->bf_key, call->bf_len);
+ if (call->pipeline[0])
+ bchannel_pipeline(bchannel, call->pipeline);
+ if (call->rx_gain)
+ bchannel_gain(bchannel, call->rx_gain, 0);
+ if (call->tx_gain)
+ bchannel_gain(bchannel, call->tx_gain, 1);
+ if (call->bridge_id) {
+ CDEBUG(call, call->ast, "Join bchannel, because call is already bridged.\n");
+ bchannel_join(bchannel, call->bridge_id);
+ }
+ /* create only, if call exists, othewhise it bchannel is freed below... */
+ if (bchannel_create(bchannel, ((call->nodsp || call->faxdetect > 0)?1:0) + ((call->hdlc)?2:0), call->nodsp_queue))
+ bchannel_activate(bchannel, 1);
+ }
+ /* acknowledge */
+ newparam.bchannel.type = BCHANNEL_ASSIGN_ACK;
+ newparam.bchannel.handle = param->bchannel.handle;
+ send_message(MESSAGE_BCHANNEL, 0, &newparam);
+ /* if call has released before bchannel is assigned */
+ if (!call) {
+ newparam.bchannel.type = BCHANNEL_RELEASE;
+ newparam.bchannel.handle = param->bchannel.handle;
+ send_message(MESSAGE_BCHANNEL, 0, &newparam);
+ }
+
+ break;
+
+ case BCHANNEL_REMOVE:
+ CDEBUG(NULL, NULL, "Received BCHANNEL_REMOVE message. (handle=%08lx)\n", param->bchannel.handle);
+ if (!(bchannel = find_bchannel_handle(param->bchannel.handle))) {
+ CERROR(NULL, NULL, "Bchannel handle %x not assigned.\n", (int)param->bchannel.handle);
+ return -1;
+ }
+ /* unklink from call and destroy bchannel */
+ free_bchannel(bchannel);
+
+ /* acknowledge */
+ newparam.bchannel.type = BCHANNEL_REMOVE_ACK;
+ newparam.bchannel.handle = param->bchannel.handle;
+ send_message(MESSAGE_BCHANNEL, 0, &newparam);
+
+ break;
+
+ default:
+ CDEBUG(NULL, NULL, "Received unknown bchannel message %d.\n", param->bchannel.type);
+ }
+ return 0;
+ }
+
+ /* handle new ref */
+ if (message_type == MESSAGE_NEWREF) {
+ if (param->direction) {
+ /* new ref from lcr */
+ CDEBUG(NULL, NULL, "Received new ref by LCR, due to incomming call. (ref=%ld)\n", ref);
+ if (!ref || find_call_ref(ref)) {
+ CERROR(NULL, NULL, "Illegal new ref %ld received.\n", ref);
+ return -1;
+ }
+ /* allocate new call instance */
+ call = alloc_call();
+ /* new state */
+ call->state = CHAN_LCR_STATE_IN_PREPARE;
+ /* set ref */
+ call->ref = ref;
+ call->ref_was_assigned = 1;
+ /* set dtmf (default, use option 'n' to disable */
+ call->dsp_dtmf = 1;
+ /* wait for setup (or release from asterisk) */
+ } else {
+ /* new ref, as requested from this remote application */
+ CDEBUG(NULL, NULL, "Received new ref by LCR, as requested from chan_lcr. (ref=%ld)\n", ref);
+ call = find_call_ref(0);
+ if (!call) {
+ /* send release, if ref does not exist */
+ CDEBUG(NULL, NULL, "No call found, that requests a ref.\n");
+ send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
+ return 0;
+ }
+ /* store new ref */
+ call->ref = ref;
+ call->ref_was_assigned = 1;
+ /* set dtmf (default, use option 'n' to disable */
+ call->dsp_dtmf = 1;
+ /* send pending setup info */
+ if (call->state == CHAN_LCR_STATE_OUT_PREPARE)
+ send_setup_to_lcr(call);
+ /* release if asterisk has signed off */
+ else if (call->state == CHAN_LCR_STATE_RELEASE) {
+ /* send release */
+ if (call->cause)
+ send_release_and_import(call, call->cause, call->location);
+ else
+ send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
+ /* free call */
+ free_call(call);
+ return 0;
+ }
+ }
+ return 0;
+ }
+
+ /* check ref */
+ if (!ref) {
+ CERROR(NULL, NULL, "Received message %d without ref.\n", message_type);
+ return -1;
+ }
+ call = find_call_ref(ref);
+ if (!call) {
+ /* ignore ref that is not used (anymore) */
+ CDEBUG(NULL, NULL, "Message %d from LCR ignored, because no call instance found.\n", message_type);
+ return 0;
+ }
+
+ /* handle messages */
+ switch(message_type) {
+ case MESSAGE_SETUP:
+ lcr_in_setup(call, message_type, param);
+ break;
+
+ case MESSAGE_OVERLAP:
+ lcr_in_overlap(call, message_type, param);
+ break;
+
+ case MESSAGE_PROCEEDING:
+ lcr_in_proceeding(call, message_type, param);
+ break;
+
+ case MESSAGE_ALERTING:
+ lcr_in_alerting(call, message_type, param);
+ break;
+
+ case MESSAGE_CONNECT:
+ lcr_in_connect(call, message_type, param);
+ break;
+
+ case MESSAGE_DISCONNECT:
+ lcr_in_disconnect(call, message_type, param);
+ break;
+
+ case MESSAGE_RELEASE:
+ lcr_in_release(call, message_type, param);
+ break;
+
+ case MESSAGE_INFORMATION:
+ lcr_in_information(call, message_type, param);
+ break;
+
+ case MESSAGE_NOTIFY:
+ lcr_in_notify(call, message_type, param);
+ break;
+
+ case MESSAGE_FACILITY:
+ lcr_in_facility(call, message_type, param);
+ break;
+
+ case MESSAGE_PATTERN: // audio available from LCR
+ if (!call->has_pattern)
+ lcr_in_pattern(call, message_type, param);
+ break;
+
+ case MESSAGE_NOPATTERN: // audio not available from LCR
+ break;
+
+ case MESSAGE_AUDIOPATH: // if remote audio connected or hold
+ call->audiopath = param->audiopath;
+ break;
+
+ default:
+ CDEBUG(call, call->ast, "Message %d from LCR unhandled.\n", message_type);
+ break;
+ }
+ return 0;
+}
+
+/*
+ * release all calls (due to broken socket)
+ */
+static void release_all_calls(void)
+{
+ struct chan_call *call;
+
+again:
+ call = call_first;
+ while(call) {
+ /* no ast, so we may directly free call */
+ if (!call->ast) {
+ CDEBUG(call, NULL, "Freeing call, because no Asterisk channel is linked.\n");
+ free_call(call);
+ goto again;
+ }
+ /* already in release process */
+ if (call->state == CHAN_LCR_STATE_RELEASE) {
+ call = call->next;
+ continue;
+ }
+ /* release or queue release */
+ call->ref = 0;
+ call->state = CHAN_LCR_STATE_RELEASE;
+ if (!call->pbx_started) {
+ CDEBUG(call, call->ast, "Releasing call, because no Asterisk channel is not started.\n");
+ ast_hangup(call->ast); // call will be destroyed here
+ goto again;
+ }
+ CDEBUG(call, call->ast, "Queue call release, because Asterisk channel is running.\n");
+ if (!wake_global) {
+ wake_global = 1;
+ char byte = 0;
+ write(wake_pipe[1], &byte, 1);
+ }
+ strcpy(call->queue_string, "H");
+ call = call->next;
+ }
+
+ /* release all bchannels */
+ while(bchannel_first)
+ free_bchannel(bchannel_first);
+}
+
+void close_socket(void);
+
+/* asterisk handler
+ * warning! not thread safe
+ * returns -1 for socket error, 0 for no work, 1 for work
+ */
+static int handle_socket(struct lcr_fd *fd, unsigned int what, void *instance, int index)
+{
+ int len;
+ struct admin_list *admin;
+ struct admin_message msg;
+
+ if ((what & LCR_FD_READ)) {
+ /* read from socket */
+ len = read(lcr_sock, &msg, sizeof(msg));
+ if (len == 0) {
+ CERROR(NULL, NULL, "Socket closed.\n");
+ error:
+ CERROR(NULL, NULL, "Handling of socket failed - closing for some seconds.\n");
+ close_socket();
+ release_all_calls();
+ schedule_timer(&socket_retry, SOCKET_RETRY_TIMER, 0);
+ return 0;
+ }
+ if (len > 0) {
+ if (len != sizeof(msg)) {
+ CERROR(NULL, NULL, "Socket short read. (len %d)\n", len);
+ goto error;
+ }
+ if (msg.message != ADMIN_MESSAGE) {
+ CERROR(NULL, NULL, "Socket received illegal message %d.\n", msg.message);
+ goto error;
+ }
+ receive_message(msg.u.msg.type, msg.u.msg.ref, &msg.u.msg.param);
+ } else {
+ CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno);
+ goto error;
+ }
+ }
+
+ if ((what & LCR_FD_WRITE)) {
+ /* write to socket */
+ if (!admin_first) {
+ socket_fd.when &= ~LCR_FD_WRITE;
+ return 0;
+ }
+ admin = admin_first;
+ len = write(lcr_sock, &admin->msg, sizeof(msg));
+ if (len == 0) {
+ CERROR(NULL, NULL, "Socket closed.\n");
+ goto error;
+ }
+ if (len > 0) {
+ if (len != sizeof(msg)) {
+ CERROR(NULL, NULL, "Socket short write. (len %d)\n", len);
+ goto error;
+ }
+ /* free head */
+ admin_first = admin->next;
+ free(admin);
+ global_change = 1;
+ } else {
+ CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno);
+ goto error;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * open and close socket and thread
+ */
+int open_socket(void)
+{
+ int conn;
+ struct sockaddr_un sock_address;
+ union parameter param;
+
+ /* open socket */
+ if ((lcr_sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
+ CERROR(NULL, NULL, "Failed to create socket.\n");
+ return lcr_sock;
+ }
+
+ /* set socket address and name */
+ memset(&sock_address, 0, sizeof(sock_address));
+ sock_address.sun_family = PF_UNIX;
+ sprintf(sock_address.sun_path, SOCKET_NAME, options.lock);
+
+ /* connect socket */
+ if ((conn = connect(lcr_sock, (struct sockaddr *)&sock_address, SUN_LEN(&sock_address))) < 0) {
+ close(lcr_sock);
+ lcr_sock = -1;
+ CDEBUG(NULL, NULL, "Failed to connect to socket '%s'. Is LCR running?\n", sock_address.sun_path);
+ return conn;
+ }
+
+ /* register socket fd */
+ memset(&socket_fd, 0, sizeof(socket_fd));
+ socket_fd.fd = lcr_sock;
+ register_fd(&socket_fd, LCR_FD_READ | LCR_FD_EXCEPT, handle_socket, NULL, 0);
+
+ /* enque hello message */
+ memset(¶m, 0, sizeof(param));
+ strcpy(param.hello.application, "asterisk");
+ send_message(MESSAGE_HELLO, 0, ¶m);
+
+ return lcr_sock;
+}
+
+void close_socket(void)
+{
+ struct admin_list *admin, *temp;
+
+ unregister_fd(&socket_fd);
+
+ /* flush pending messages */
+ admin = admin_first;
+ while(admin) {
+ temp = admin;
+ admin = admin->next;
+ free(temp);
+ }
+ admin_first = NULL;
+
+ /* close socket */
+ if (lcr_sock >= 0)
+ close(lcr_sock);
+ lcr_sock = -1;
+ global_change = 1;
+}
+
+
+/* sending queue to asterisk */
+static int wake_event(struct lcr_fd *fd, unsigned int what, void *instance, int index)
+{
+ char byte;
+
+ read(wake_pipe[0], &byte, 1);
+
+ wake_global = 0;
+
+ return 0;
+}
+
+static void handle_queue()
+{
+ struct chan_call *call;
+ struct ast_channel *ast;
+ struct ast_frame fr;
+ char *p;
+
+ call = call_first;
+ while(call) {
+ p = call->queue_string;
+ ast = call->ast;
+ if (*p && ast) {
+ ast_channel_lock(ast);
+ while(*p) {
+ switch (*p) {
+ case 'T':
+ CDEBUG(call, ast, "Sending queued PROGRESS to Asterisk.\n");
+ ast_queue_control(ast, AST_CONTROL_PROGRESS);
+ break;
+ case 'P':
+ CDEBUG(call, ast, "Sending queued PROCEEDING to Asterisk.\n");
+ ast_queue_control(ast, AST_CONTROL_PROCEEDING);
+ break;
+ case 'R':
+ CDEBUG(call, ast, "Sending queued RINGING to Asterisk.\n");
+ ast_queue_control(ast, AST_CONTROL_RINGING);
+ ast_setstate(ast, AST_STATE_RINGING);
+ break;
+ case 'N':
+ CDEBUG(call, ast, "Sending queued ANSWER to Asterisk.\n");
+ ast_queue_control(ast, AST_CONTROL_ANSWER);
+ break;
+ case 'H':
+ CDEBUG(call, ast, "Sending queued HANGUP to Asterisk.\n");
+ ast_queue_hangup(ast);
+ break;
+ case '1': case '2': case '3': case 'A':
+ case '4': case '5': case '6': case 'B':
+ case '7': case '8': case '9': case 'C':
+ case '*': case '0': case '#': case 'D':
+ CDEBUG(call, ast, "Sending queued digit '%c' to Asterisk.\n", *p);
+ /* send digit to asterisk */
+ memset(&fr, 0, sizeof(fr));
+
+ #ifdef LCR_FOR_ASTERISK
+ fr.frametype = AST_FRAME_DTMF_BEGIN;
+ #endif
+
+ #ifdef LCR_FOR_CALLWEAVER
+ fr.frametype = AST_FRAME_DTMF;
+ #endif
+
+ fr.subclass = *p;
+ fr.delivery = ast_tv(0, 0);
+ ast_queue_frame(ast, &fr);
+
+ #ifdef LCR_FOR_ASTERISK
+ fr.frametype = AST_FRAME_DTMF_END;
+ ast_queue_frame(ast, &fr);
+ #endif
+
+ break;
+ default:
+ CDEBUG(call, ast, "Ignoring queued digit 0x%02x.\n", *p);
+ }
+ p++;
+ }
+ call->queue_string[0] = '\0';
+ ast_channel_unlock(ast);
+ }
+ call = call->next;
+ }
+}
+
+static int handle_retry(struct lcr_timer *timer, void *instance, int index)
+{
+ CDEBUG(NULL, NULL, "Retry to open socket.\n");
+ if (open_socket() < 0)
+ schedule_timer(&socket_retry, SOCKET_RETRY_TIMER, 0);
+
+ return 0;
+}
+
+void lock_chan(void)
+{
+ ast_mutex_lock(&chan_lock);
+}
+
+void unlock_chan(void)
+{
+ ast_mutex_unlock(&chan_lock);
+}
+
+/* chan_lcr thread */
+static void *chan_thread(void *arg)
+{
+ if (pipe(wake_pipe) < 0) {
+ CERROR(NULL, NULL, "Failed to open pipe.\n");
+ return NULL;
+ }
+ memset(&wake_fd, 0, sizeof(wake_fd));
+ wake_fd.fd = wake_pipe[0];
+ register_fd(&wake_fd, LCR_FD_READ, wake_event, NULL, 0);
+
+ memset(&socket_retry, 0, sizeof(socket_retry));
+ add_timer(&socket_retry, handle_retry, NULL, 0);
+
+ bchannel_pid = getpid();
+
+ /* open socket the first time */
+ handle_retry(NULL, NULL, 0);
+
+ ast_mutex_lock(&chan_lock);
+
+ while(!quit) {
+ handle_queue();
+ select_main(0, &global_change, lock_chan, unlock_chan);
+ }
+
+ close_socket();
+
+ del_timer(&socket_retry);
+
+ unregister_fd(&wake_fd);
+ close(wake_pipe[0]);
+ close(wake_pipe[1]);
+
+ CERROR(NULL, NULL, "Thread exit.\n");
+
+ ast_mutex_unlock(&chan_lock);
+
+ return NULL;
+}
+
+/*
+ * new asterisk instance
+ */
+static
+struct ast_channel *lcr_request(const char *type, int format, void *data, int *cause)
+{
+ char exten[256], *dial, *interface, *opt;
+ struct ast_channel *ast;
+ struct chan_call *call;
+
+ ast_mutex_lock(&chan_lock);
+ CDEBUG(NULL, NULL, "Received request from Asterisk. (data=%s)\n", (char *)data);
+
+ /* if socket is closed */
+ if (lcr_sock < 0) {
+ CERROR(NULL, NULL, "Rejecting call from Asterisk, because LCR not running.\n");
+ ast_mutex_unlock(&chan_lock);
+ return NULL;
+ }
+
+ /* create call instance */
+ call = alloc_call();
+ if (!call) {
+ /* failed to create instance */
+ ast_mutex_unlock(&chan_lock);
+ return NULL;
+ }
+
+ /* create asterisk channel instrance */
+
+ #ifdef LCR_FOR_ASTERISK
+ ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel);
+ #endif
+
+ #ifdef LCR_FOR_CALLWEAVER
+ ast = ast_channel_alloc(1);
+ #endif
+
+ if (!ast) {
+ CERROR(NULL, NULL, "Failed to create Asterisk channel.\n");
+ free_call(call);
+ /* failed to create instance */
+ ast_mutex_unlock(&chan_lock);
+ return NULL;
+ }
+ ast->tech = &lcr_tech;
+ ast->tech_pvt = (void *)1L; // set pointer or asterisk will not call
+ /* configure channel */
+ ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
+ ast->readformat = ast->rawreadformat = ast->nativeformats;
+ ast->writeformat = ast->rawwriteformat = ast->nativeformats;
+ ast->priority = 1;
+ ast->hangupcause = 0;
+
+ /* link together */
+ call->ast = ast;
+ ast->tech_pvt = call;
+ ast->fds[0] = call->pipe[0];
+ call->pbx_started = 0;
+ /* set state */
+ call->state = CHAN_LCR_STATE_OUT_PREPARE;
+
+ /*
+ * Extract interface, dialstring, options from data.
+ * Formats can be:
+ * <dialstring>
+ * <interface>/<dialstring>
+ * <interface>/<dialstring>/options
+ */
+ strncpy(exten, (char *)data, sizeof(exten)-1);
+ exten[sizeof(exten)-1] = '\0';
+ if ((dial = strchr(exten, '/'))) {
+ *dial++ = '\0';
+ interface = exten;
+ if ((opt = strchr(dial, '/')))
+ *opt++ = '\0';
+ else
+ opt = "";
+ } else {
+ dial = exten;
+ interface = "";
+ opt = "";
+ }
+ strncpy(call->interface, interface, sizeof(call->interface)-1);
+ strncpy(call->dialstring, dial, sizeof(call->dialstring)-1);
+ apply_opt(call, (char *)opt);
+
+ ast_mutex_unlock(&chan_lock);
+ return ast;
+}
+
+/*
+ * call from asterisk
+ */
+static int lcr_call(struct ast_channel *ast, char *dest, int timeout)
+{
+ union parameter newparam;
+ struct chan_call *call;
+
+ ast_mutex_lock(&chan_lock);
+ call = ast->tech_pvt;
+
+ #ifdef LCR_FOR_CALLWEAVER
+ ast->type = "LCR";
+ snprintf(ast->name, sizeof(ast->name), "LCR/%s-%04x",call->dialstring, ast_random() & 0xffff);
+ #endif
+
+ if (!call) {
+ CERROR(NULL, ast, "Received call from Asterisk, but call instance does not exist.\n");
+ ast_mutex_unlock(&chan_lock);
+ return -1;
+ }
+
+ CDEBUG(NULL, ast, "Received call from Asterisk.\n");
+
+ /* pbx process is started */
+ call->pbx_started = 1;
+ /* send MESSAGE_NEWREF */
+ memset(&newparam, 0, sizeof(union parameter));
+ newparam.direction = 0; /* request from app */
+ send_message(MESSAGE_NEWREF, 0, &newparam);
+
+ /* set hdlc if capability requires hdlc */
+ if (ast->transfercapability == INFO_BC_DATAUNRESTRICTED
+ || ast->transfercapability == INFO_BC_DATARESTRICTED
+ || ast->transfercapability == INFO_BC_VIDEO)
+ call->hdlc = 1;
+ /* if hdlc is forced by option, we change transcap to data */
+ if (call->hdlc
+ && ast->transfercapability != INFO_BC_DATAUNRESTRICTED
+ && ast->transfercapability != INFO_BC_DATARESTRICTED
+ && ast->transfercapability != INFO_BC_VIDEO)
+ ast->transfercapability = INFO_BC_DATAUNRESTRICTED;
+
+ call->cid_num[0] = 0;
+ call->cid_name[0] = 0;
+ call->cid_rdnis[0] = 0;
+
+ if (ast->cid.cid_num) if (ast->cid.cid_num[0])
+ strncpy(call->cid_num, ast->cid.cid_num,
+ sizeof(call->cid_num)-1);
+
+ if (ast->cid.cid_name) if (ast->cid.cid_name[0])
+ strncpy(call->cid_name, ast->cid.cid_name,
+ sizeof(call->cid_name)-1);
+ if (ast->cid.cid_rdnis) if (ast->cid.cid_rdnis[0])
+ strncpy(call->cid_rdnis, ast->cid.cid_rdnis,
+ sizeof(call->cid_rdnis)-1);
+
+ ast_mutex_unlock(&chan_lock);
+ return 0;
+}
+
+static void send_digit_to_chan(struct ast_channel * ast, char digit )
+{
+ static const char* dtmf_tones[] = {
+ "!941+1336/100,!0/100", /* 0 */
+ "!697+1209/100,!0/100", /* 1 */
+ "!697+1336/100,!0/100", /* 2 */
+ "!697+1477/100,!0/100", /* 3 */
+ "!770+1209/100,!0/100", /* 4 */
+ "!770+1336/100,!0/100", /* 5 */
+ "!770+1477/100,!0/100", /* 6 */
+ "!852+1209/100,!0/100", /* 7 */
+ "!852+1336/100,!0/100", /* 8 */
+ "!852+1477/100,!0/100", /* 9 */
+ "!697+1633/100,!0/100", /* A */
+ "!770+1633/100,!0/100", /* B */
+ "!852+1633/100,!0/100", /* C */
+ "!941+1633/100,!0/100", /* D */
+ "!941+1209/100,!0/100", /* * */
+ "!941+1477/100,!0/100" }; /* # */
+
+ if (digit >= '0' && digit <='9')
+ ast_playtones_start(ast,0,dtmf_tones[digit-'0'], 0);
+ else if (digit >= 'A' && digit <= 'D')
+ ast_playtones_start(ast,0,dtmf_tones[digit-'A'+10], 0);
+ else if (digit == '*')
+ ast_playtones_start(ast,0,dtmf_tones[14], 0);
+ else if (digit == '#')
+ ast_playtones_start(ast,0,dtmf_tones[15], 0);
+ else {
+ /* not handled */
+ ast_log(LOG_DEBUG, "Unable to handle DTMF tone "
+ "'%c' for '%s'\n", digit, ast->name);
+ }
+}
+
+#ifdef LCR_FOR_ASTERISK
+static int lcr_digit_begin(struct ast_channel *ast, char digit)
+#endif
+#ifdef LCR_FOR_CALLWEAVER
+static int lcr_digit(struct ast_channel *ast, char digit)
+#endif
+{
+ struct chan_call *call;
+ union parameter newparam;
+ char buf[]="x";
+
+#ifdef LCR_FOR_CALLWEAVER
+ int inband_dtmf = 0;
+#endif
+
+ /* only pass IA5 number space */
+ if (digit > 126 || digit < 32)
+ return 0;
+
+ ast_mutex_lock(&chan_lock);
+ call = ast->tech_pvt;
+ if (!call) {
+ CERROR(NULL, ast, "Received digit from Asterisk, but no call instance exists.\n");
+ ast_mutex_unlock(&chan_lock);
+ return -1;
+ }
+
+ CDEBUG(call, ast, "Received digit '%c' from Asterisk.\n", digit);
+
+ /* send information or queue them */
+ if (call->ref && call->state == CHAN_LCR_STATE_OUT_DIALING) {
+ CDEBUG(call, ast, "Sending digit to LCR, because we are in dialing state.\n");
+ memset(&newparam, 0, sizeof(union parameter));
+ if (call->keypad) {
+ newparam.information.keypad[0] = digit;
+ newparam.information.keypad[1] = '\0';
+ } else {
+ newparam.information.id[0] = digit;
+ newparam.information.id[1] = '\0';
+ }
+ send_message(MESSAGE_INFORMATION, call->ref, &newparam);
+ } else
+ if (!call->ref
+ && (call->state == CHAN_LCR_STATE_OUT_PREPARE || call->state == CHAN_LCR_STATE_OUT_SETUP)) {
+ CDEBUG(call, ast, "Queue digits, because we are in setup/dialing state and have no ref yet.\n");
+ *buf = digit;
+ strncat(call->dialque, buf, strlen(call->dialque)-1);
+ }
+
+ ast_mutex_unlock(&chan_lock);
+
+#ifdef LCR_FOR_ASTERISK
+ return 0;
+}
+
+static int lcr_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
+{
+ int inband_dtmf = 0;
+ struct chan_call *call;
+#endif
+
+ ast_mutex_lock(&chan_lock);
+
+ call = ast->tech_pvt;
+
+ if (!call) {
+ CERROR(NULL, ast,
+ "Received digit from Asterisk, "
+ "but no call instance exists.\n");
+ ast_mutex_unlock(&chan_lock);
+ return -1;
+ }
+
+ CDEBUG(call, ast, "DIGIT END '%c' from Asterisk.\n", digit);
+
+ if (call->state == CHAN_LCR_STATE_CONNECT && call->inband_dtmf) {
+ inband_dtmf = 1;
+ }
+
+ ast_mutex_unlock(&chan_lock);
+
+ if (inband_dtmf) {
+ CDEBUG(call, ast, "-> sending '%c' inband.\n", digit);
+ send_digit_to_chan(ast, digit);
+ }
+
+ return 0;
+}
+
+static int lcr_answer(struct ast_channel *ast)
+{
+ union parameter newparam;
+ struct chan_call *call;
+
+ ast_mutex_lock(&chan_lock);
+ call = ast->tech_pvt;
+ if (!call) {
+ CERROR(NULL, ast, "Received answer from Asterisk, but no call instance exists.\n");
+ ast_mutex_unlock(&chan_lock);
+ return -1;
+ }
+
+ CDEBUG(call, ast, "Received answer from Asterisk (maybe during lcr_bridge).\n");
+
+ /* copy connectinfo, if bridged */
+ if (call->bridge_call)
+ memcpy(&call->connectinfo, &call->bridge_call->connectinfo, sizeof(struct connect_info));
+ /* send connect message to lcr */
+ if (call->state != CHAN_LCR_STATE_CONNECT) {
+ memset(&newparam, 0, sizeof(union parameter));
+ memcpy(&newparam.connectinfo, &call->connectinfo, sizeof(struct connect_info));
+ send_message(MESSAGE_CONNECT, call->ref, &newparam);
+ call->state = CHAN_LCR_STATE_CONNECT;
+ }
+ /* change state */
+ /* request bchannel */
+ if (!call->bchannel) {
+ CDEBUG(call, ast, "Requesting B-channel.\n");
+ memset(&newparam, 0, sizeof(union parameter));
+ newparam.bchannel.type = BCHANNEL_REQUEST;
+ send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
+ }
+ /* enable keypad */
+// memset(&newparam, 0, sizeof(union parameter));
+// send_message(MESSAGE_ENABLEKEYPAD, call->ref, &newparam);
+
+ ast_mutex_unlock(&chan_lock);
+ return 0;
+}
+
+static int lcr_hangup(struct ast_channel *ast)
+{
+ struct chan_call *call;
+ pthread_t tid = pthread_self();
+
+ if (!pthread_equal(tid, chan_tid))
+ ast_mutex_lock(&chan_lock);
+ call = ast->tech_pvt;
+ if (!call) {
+ CERROR(NULL, ast, "Received hangup from Asterisk, but no call instance exists.\n");
+ if (!pthread_equal(tid, chan_tid))
+ ast_mutex_unlock(&chan_lock);
+ return -1;
+ }
+
+ if (!pthread_equal(tid, chan_tid))
+ CDEBUG(call, ast, "Received hangup from Asterisk thread.\n");
+ else
+ CDEBUG(call, ast, "Received hangup from LCR thread.\n");
+
+ /* disconnect asterisk, maybe not required */
+ ast->tech_pvt = NULL;
+ ast->fds[0] = -1;
+ if (call->ref) {
+ /* release */
+ CDEBUG(call, ast, "Releasing ref and freeing call instance.\n");
+ if (ast->hangupcause > 0)
+ send_release_and_import(call, ast->hangupcause, LOCATION_PRIVATE_LOCAL);
+ else
+ send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
+ /* remove call */
+ free_call(call);
+ if (!pthread_equal(tid, chan_tid))
+ ast_mutex_unlock(&chan_lock);
+ return 0;
+ } else {
+ /* ref is not set, due to prepare setup or release */
+ if (call->state == CHAN_LCR_STATE_RELEASE) {
+ /* we get the response to our release */
+ CDEBUG(call, ast, "Freeing call instance, because we have no ref AND we are requesting no ref.\n");
+ free_call(call);
+ } else {
+ /* during prepare, we change to release state */
+ CDEBUG(call, ast, "We must wait until we received our ref, until we can free call instance.\n");
+ call->state = CHAN_LCR_STATE_RELEASE;
+ call->ast = NULL;
+ }
+ }
+ if (!pthread_equal(tid, chan_tid))
+ ast_mutex_unlock(&chan_lock);
+ return 0;
+}
+
+static int lcr_write(struct ast_channel *ast, struct ast_frame *f)
+{
+ struct chan_call *call;
+
+ if (!f->subclass)
+ CDEBUG(NULL, ast, "No subclass\n");
+ if (!(f->subclass & ast->nativeformats))
+ CDEBUG(NULL, ast, "Unexpected format.\n");
+
+ ast_mutex_lock(&chan_lock);
+ call = ast->tech_pvt;
+ if (!call) {
+ ast_mutex_unlock(&chan_lock);
+ return -1;
+ }
+ if (call->bchannel && f->samples)
+ bchannel_transmit(call->bchannel, *((unsigned char **)&(f->data)), f->samples);
+ ast_mutex_unlock(&chan_lock);
+ return 0;
+}
+
+
+static struct ast_frame *lcr_read(struct ast_channel *ast)
+{
+ struct chan_call *call;
+ int len;