chan_lcr: Select remote interface by chan_lcr
[lcr.git] / chan_lcr.c
index a2951ae..657edf8 100644 (file)
@@ -136,6 +136,13 @@ it is called from ast_channel process which has already locked ast_channel.
 #ifdef LCR_FOR_ASTERISK
 #include <asterisk/buildopts.h>
 #endif
+
+/*
+ * Fwd declare struct ast_channel to get rid of gcc warning about
+ * incompatible pointer type passed to ast_register_application2.
+ */
+struct ast_channel;
+
 #include <asterisk/module.h>
 #include <asterisk/channel.h>
 #include <asterisk/config.h>
@@ -170,7 +177,6 @@ it is called from ast_channel process which has already locked ast_channel.
 #include "lcrsocket.h"
 #include "cause.h"
 #include "select.h"
-#include "bchannel.h"
 #include "options.h"
 #include "chan_lcr.h"
 
@@ -188,7 +194,6 @@ static struct ast_frame nullframe = { AST_FRAME_NULL, };
 #endif
 
 int lcr_debug=1;
-int mISDN_created=1;
 
 char lcr_type[]="lcr";
 
@@ -290,11 +295,6 @@ void free_call(struct chan_call *call)
                                close(call->pipe[0]);
                        if (call->pipe[1] > -1)
                                close(call->pipe[1]);
-                       if (call->bchannel) {
-                               if (call->bchannel->call != call)
-                                       CERROR(call, NULL, "Linked bchannel structure has no link to us.\n");
-                               call->bchannel->call = NULL;
-                       }
                        if (call->bridge_call) {
                                if (call->bridge_call->bridge_call != call)
                                        CERROR(call, NULL, "Linked call structure has no link to us.\n");
@@ -366,7 +366,8 @@ int send_message(int message_type, unsigned int ref, union parameter *param)
                CDEBUG(NULL, NULL, "Ignoring message %d, because socket is closed.\n", message_type);
                return -1;
        }
-       CDEBUG(NULL, NULL, "Sending %s to socket. (ref=%d)\n", messages_txt[message_type], ref);
+       if (message_type != MESSAGE_TRAFFIC)
+               CDEBUG(NULL, NULL, "Sending %s to socket. (ref=%d)\n", messages_txt[message_type], ref);
 
        adminp = &admin_first;
        while(*adminp)
@@ -386,7 +387,8 @@ int send_message(int message_type, unsigned int ref, union parameter *param)
        if (!wake_global) {
                wake_global = 1;
                char byte = 0;
-               write(wake_pipe[1], &byte, 1);
+               int rc;
+               rc = write(wake_pipe[1], &byte, 1);
        }
 
        return 0;
@@ -398,8 +400,8 @@ int send_message(int message_type, unsigned int ref, union parameter *param)
 void apply_opt(struct chan_call *call, char *data)
 {
        union parameter newparam;
-       char string[1024], *p = string, *opt, *key;
-       int gain, i;
+       char string[1024], *p = string, *opt;//, *key;
+//     int gain, i;
 
        if (!data[0])
                return; // no opts
@@ -430,12 +432,9 @@ void apply_opt(struct chan_call *call, char *data)
                                break;
                        }
                        CDEBUG(call, call->ast, "Option 'n' (no DTMF).\n");
-                       if (call->dsp_dtmf) {
-                               call->dsp_dtmf = 0;
-                               if (call->bchannel)
-                                       bchannel_dtmf(call->bchannel, 0);
-                       }
+                       call->dsp_dtmf = 0;
                        break;
+#if 0
                case 'c':
                        if (opt[1] == '\0') {
                                CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter.\n", opt);
@@ -483,6 +482,7 @@ void apply_opt(struct chan_call *call, char *data)
                        if (call->bchannel)
                                bchannel_blowfish(call->bchannel, call->bf_key, call->bf_len);
                        break;
+#endif
                case 'h':
                        if (opt[1] != '\0') {
                                CERROR(call, call->ast, "Option 'h' (HDLC) expects no parameter.\n", opt);
@@ -492,23 +492,15 @@ void apply_opt(struct chan_call *call, char *data)
                        if (!call->hdlc)
                                call->hdlc = 1;
                        break;
-               case 't':
-                       if (opt[1] != '\0') {
-                               CERROR(call, call->ast, "Option 't' (no_dsp) expects no parameter.\n", opt);
-                               break;
-                       }
-                       CDEBUG(call, call->ast, "Option 't' (no dsp).\n");
-                       if (!call->nodsp)
-                               call->nodsp = 1;
-                       break;
                case 'q':
                        if (opt[1] == '\0') {
                                CERROR(call, call->ast, "Option 'q' (queue) expects parameter.\n", opt);
                                break;
                        }
                        CDEBUG(call, call->ast, "Option 'q' (queue).\n");
-                       call->nodsp_queue = atoi(opt+1);
+                       call->tx_queue = atoi(opt+1);
                        break;
+#if 0
                case 'e':
                        if (opt[1] == '\0') {
                                CERROR(call, call->ast, "Option 'e' (echo cancel) expects parameter.\n", opt);
@@ -519,44 +511,24 @@ void apply_opt(struct chan_call *call, char *data)
                        if (call->bchannel)
                                bchannel_pipeline(call->bchannel, call->pipeline);
                        break;
+#endif
                case 'f':
-                       if (opt[1] == '\0') {
-                               CERROR(call, call->ast, "Option 'f' (faxdetect) expects parameter.\n", opt);
+                       if (opt[1] != '\0') {
+                               CERROR(call, call->ast, "Option 'f' (faxdetect) expects no parameter.\n", opt);
                                break;
                        }
-                       call->faxdetect=atoi(opt+1);
-                       if (!call->dsp)
-                               call->dsp=ast_dsp_new();
-                       if (call->dsp) {
-                               #ifdef LCR_FOR_CALLWEAVER
-                               ast_dsp_set_features(call->dsp, DSP_FEATURE_DTMF_DETECT| DSP_FEATURE_FAX_CNG_DETECT);
-                               #endif
-                               #ifdef LCR_FOR_ASTERISK
-                               #ifdef DSP_FEATURE_DTMF_DETECT
-                               ast_dsp_set_features(call->dsp, DSP_FEATURE_DTMF_DETECT| DSP_FEATURE_FAX_DETECT);
-                               #else
-                               ast_dsp_set_features(call->dsp, DSP_FEATURE_DIGIT_DETECT| DSP_FEATURE_FAX_DETECT);
-                               #endif
-
-                               #endif
-                               if (!call->trans) {
-                                       #ifdef LCR_FOR_CALLWEAVER
-                                       call->trans=ast_translator_build_path(AST_FORMAT_SLINEAR, 8000, (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW, 8000);
-                                       #endif
-                                       #ifdef LCR_FOR_ASTERISK
-                                       #if ASTERISK_VERSION_NUM < 100000
-                                       call->trans=ast_translator_build_path(AST_FORMAT_SLINEAR, (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW);
-                                       #else
-                                       struct ast_format src;
-                                       struct ast_format dst;
-                                       ast_format_set(&dst, AST_FORMAT_SLINEAR, 0);
-                                       ast_format_set(&dst,(options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW , 0);
-                                       call->trans=ast_translator_build_path(&dst, &src);
-                                       #endif
-                                       #endif
-                               }
+                       call->faxdetect = 1;
+                       call->dsp_dtmf = 0;
+                       CDEBUG(call, call->ast, "Option 'f' (faxdetect).\n");
+                       break;
+               case 'a':
+                       if (opt[1] != '\0') {
+                               CERROR(call, call->ast, "Option 'a' (asterisk DTMF) expects no parameter.\n", opt);
+                               break;
                        }
-                       CDEBUG(call, call->ast, "Option 'f' (faxdetect) with config '%s'.\n", call->faxdetect);
+                       call->ast_dsp = 1;
+                       call->dsp_dtmf = 0;
+                       CDEBUG(call, call->ast, "Option 'a' (Asterisk DTMF detection).\n");
                        break;
                case 'r':
                        if (opt[1] != '\0') {
@@ -575,6 +547,7 @@ void apply_opt(struct chan_call *call, char *data)
                        CDEBUG(call, call->ast, "Option 's' (inband DTMF).\n");
                        call->inband_dtmf = 1;
                        break;
+#if 0
                case 'v':
                        if (opt[1] != 'r' && opt[1] != 't') {
                                CERROR(call, call->ast, "Option 'v' (volume) expects parameter.\n", opt);
@@ -596,6 +569,7 @@ void apply_opt(struct chan_call *call, char *data)
                                        bchannel_gain(call->bchannel, call->tx_gain, 1);
                        }
                        break;
+#endif
                case 'k':
                        if (opt[1] != '\0') {
                                CERROR(call, call->ast, "Option 'k' (keypad) expects no parameter.\n", opt);
@@ -610,11 +584,38 @@ void apply_opt(struct chan_call *call, char *data)
                }
        }
 
-       /* re-open, if bchannel is created */
-       if (call->bchannel && call->bchannel->b_sock > -1) {
-               bchannel_destroy(call->bchannel);
-               if (bchannel_create(call->bchannel, ((call->nodsp || call->faxdetect > 0)?1:0) + ((call->hdlc)?2:0), call->nodsp_queue))
-                       bchannel_activate(call->bchannel, 1);
+       if (call->faxdetect || call->ast_dsp) {
+               if (!call->dsp)
+                       call->dsp=ast_dsp_new();
+               if (call->dsp) {
+                       #ifdef LCR_FOR_CALLWEAVER
+                       ast_dsp_set_features(call->dsp, DSP_FEATURE_DTMF_DETECT | ((call->faxdetect) ? DSP_FEATURE_FAX_CNG_DETECT : 0));
+                       #endif
+                       #ifdef LCR_FOR_ASTERISK
+                       #ifdef DSP_FEATURE_DTMF_DETECT
+                       ast_dsp_set_features(call->dsp, DSP_FEATURE_DTMF_DETECT | ((call->faxdetect) ? DSP_FEATURE_FAX_DETECT : 0));
+                       #else
+                       ast_dsp_set_features(call->dsp, DSP_FEATURE_DIGIT_DETECT | ((call->faxdetect) ? DSP_FEATURE_FAX_DETECT : 0));
+                       #endif
+
+                       #endif
+                       if (!call->trans) {
+                               #ifdef LCR_FOR_CALLWEAVER
+                               call->trans=ast_translator_build_path(AST_FORMAT_SLINEAR, 8000, (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW, 8000);
+                               #endif
+                               #ifdef LCR_FOR_ASTERISK
+                               #if ASTERISK_VERSION_NUM < 100000
+                               call->trans=ast_translator_build_path(AST_FORMAT_SLINEAR, (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW);
+//                             #else
+//                             struct ast_format src;
+//                             struct ast_format dst;
+//                             ast_format_set(&dst, AST_FORMAT_SLINEAR, 0);
+//                             ast_format_set(&dst,(options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW , 0);
+//                             call->trans=ast_translator_build_path(&dst, &src);
+                               #endif
+                               #endif
+                       }
+               }
        }
 }
 
@@ -645,8 +646,6 @@ static void send_setup_to_lcr(struct chan_call *call)
                strncpy(newparam.setup.dialinginfo.keypad, call->dialstring, sizeof(newparam.setup.dialinginfo.keypad)-1);
        else
                strncpy(newparam.setup.dialinginfo.id, call->dialstring, sizeof(newparam.setup.dialinginfo.id)-1);
-       if (!!strcmp(call->interface, "pbx"))
-               strncpy(newparam.setup.dialinginfo.interfaces, call->interface, sizeof(newparam.setup.dialinginfo.interfaces)-1);
        newparam.setup.callerinfo.itype = INFO_ITYPE_CHAN;
        newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN;
        strncpy(newparam.setup.callerinfo.display, call->display, sizeof(newparam.setup.callerinfo.display)-1);
@@ -711,6 +710,11 @@ static void send_setup_to_lcr(struct chan_call *call)
        newparam.setup.capainfo.hlc = INFO_HLC_NONE;
        newparam.setup.capainfo.exthlc = INFO_HLC_NONE;
        send_message(MESSAGE_SETUP, call->ref, &newparam);
+       if (call->tx_queue) {
+               memset(&newparam, 0, sizeof(union parameter));
+               newparam.queue = call->tx_queue * 8;
+               send_message(MESSAGE_DISABLE_DEJITTER, call->ref, &newparam);
+       }
 
        /* change to outgoing setup state */
        call->state = CHAN_LCR_STATE_OUT_SETUP;
@@ -754,19 +758,12 @@ static void bridge_message_if_bridged(struct chan_call *call, int message_type,
 }
 
 /*
- * send release message to LCR and import bchannel if exported
+ * send release message to LCR
  */
-static void send_release_and_import(struct chan_call *call, int cause, int location)
+static void send_release(struct chan_call *call, int cause, int location)
 {
        union parameter newparam;
 
-       /* importing channel */
-       if (call->bchannel) {
-               memset(&newparam, 0, sizeof(union parameter));
-               newparam.bchannel.type = BCHANNEL_RELEASE;
-               newparam.bchannel.handle = call->bchannel->handle;
-               send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
-       }
        /* sending release */
        memset(&newparam, 0, sizeof(union parameter));
        newparam.disconnectinfo.cause = cause;
@@ -858,6 +855,15 @@ CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at
                        goto start;
                }
 
+               /* 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 can match */
                CDEBUG(call, ast, "Extensions may match, if more digits are dialed.\n");
                return;
@@ -868,6 +874,15 @@ CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at
 #else
        if (!*ast_channel_exten(ast)) {
 #endif
+               /* 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 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;
@@ -878,7 +893,7 @@ CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at
        release:
        /* release lcr */
        CDEBUG(call, ast, "Releasing due to extension missmatch.\n");
-       send_release_and_import(call, cause, LOCATION_PRIVATE_LOCAL);
+       send_release(call, cause, LOCATION_PRIVATE_LOCAL);
        call->ref = 0;
        /* release asterisk */
 #if ASTERISK_VERSION_NUM < 110000
@@ -915,8 +930,12 @@ CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at
 static void lcr_in_setup(struct chan_call *call, int message_type, union parameter *param)
 {
        struct ast_channel *ast;
+#ifdef AST_1_8_OR_HIGHER
        struct ast_party_redirecting *ast_redir;
        struct ast_party_caller *ast_caller;
+#else
+       struct ast_callerid *ast_caller;
+#endif
 #if ASTERISK_VERSION_NUM >= 110000
        struct ast_party_redirecting s_ast_redir;
        struct ast_party_caller s_ast_caller;
@@ -940,9 +959,13 @@ static void lcr_in_setup(struct chan_call *call, int message_type, union paramet
        #endif
 
 #if ASTERISK_VERSION_NUM < 110000
+#ifdef AST_1_8_OR_HIGHER
        ast_redir = &ast->redirecting;
        ast_caller = &ast->caller;
 #else
+       ast_caller = &ast->cid;
+#endif
+#else
        ast_redir = &s_ast_redir;
        ast_caller = &s_ast_caller;
 #endif
@@ -950,7 +973,7 @@ static void lcr_in_setup(struct chan_call *call, int message_type, union paramet
        if (!ast) {
                /* release */
                CERROR(call, NULL, "Failed to create Asterisk channel - releasing.\n");
-               send_release_and_import(call, CAUSE_RESSOURCEUNAVAIL, LOCATION_PRIVATE_LOCAL);
+               send_release(call, CAUSE_RESSOURCEUNAVAIL, LOCATION_PRIVATE_LOCAL);
                /* remove call */
                free_call(call);
                return;
@@ -971,8 +994,8 @@ static void lcr_in_setup(struct chan_call *call, int message_type, union paramet
        if (param->setup.dialinginfo.id)
 #if ASTERISK_VERSION_NUM < 110000
                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);
+       if (param->setup.dialinginfo.context[0])
+               strncpy(ast->context, param->setup.dialinginfo.context, AST_MAX_CONTEXT-1);
        else
                strncpy(ast->context, param->setup.callerinfo.interface, AST_MAX_CONTEXT-1);
 #else
@@ -1229,7 +1252,8 @@ static void lcr_in_proceeding(struct chan_call *call, int message_type, union pa
                if (!wake_global) {
                        wake_global = 1;
                        char byte = 0;
-                       write(wake_pipe[1], &byte, 1);
+                       int rc;
+                       rc = write(wake_pipe[1], &byte, 1);
                }
                strncat(call->queue_string, "P", sizeof(call->queue_string)-1);
        }
@@ -1250,7 +1274,8 @@ static void lcr_in_alerting(struct chan_call *call, int message_type, union para
                if (!wake_global) {
                        wake_global = 1;
                        char byte = 0;
-                       write(wake_pipe[1], &byte, 1);
+                       int rc;
+                       rc = write(wake_pipe[1], &byte, 1);
                }
                strncat(call->queue_string, "R", sizeof(call->queue_string)-1);
        }
@@ -1261,19 +1286,10 @@ static void lcr_in_alerting(struct chan_call *call, int message_type, union para
  */
 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. (ref=%d)\n", call->ref);
-               memset(&newparam, 0, sizeof(union parameter));
-               newparam.bchannel.type = BCHANNEL_REQUEST;
-               send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
-       }
        /* copy connectinfo */
        memcpy(&call->connectinfo, &param->connectinfo, sizeof(struct connect_info));
        /* queue event to asterisk */
@@ -1281,7 +1297,8 @@ static void lcr_in_connect(struct chan_call *call, int message_type, union param
                if (!wake_global) {
                        wake_global = 1;
                        char byte = 0;
-                       write(wake_pipe[1], &byte, 1);
+                       int rc;
+                       rc = write(wake_pipe[1], &byte, 1);
                }
                strncat(call->queue_string, "N", sizeof(call->queue_string)-1);
        }
@@ -1311,7 +1328,7 @@ static void lcr_in_disconnect(struct chan_call *call, int message_type, union pa
        }
 #endif
        /* release lcr with same cause */
-       send_release_and_import(call, call->cause, call->location);
+       send_release(call, call->cause, call->location);
        call->ref = 0;
        /* change to release state */
        call->state = CHAN_LCR_STATE_RELEASE;
@@ -1326,7 +1343,8 @@ static void lcr_in_disconnect(struct chan_call *call, int message_type, union pa
                        if (!wake_global) {
                                wake_global = 1;
                                char byte = 0;
-                               write(wake_pipe[1], &byte, 1);
+                               int rc;
+                               rc = write(wake_pipe[1], &byte, 1);
                        }
                        strcpy(call->queue_string, "H"); // overwrite other indications
                } else {
@@ -1364,7 +1382,8 @@ static void lcr_in_release(struct chan_call *call, int message_type, union param
                        if (!wake_global) {
                                wake_global = 1;
                                char byte = 0;
-                               write(wake_pipe[1], &byte, 1);
+                               int rc;
+                               rc = write(wake_pipe[1], &byte, 1);
                        }
                        strcpy(call->queue_string, "H");
                } else {
@@ -1411,15 +1430,29 @@ static void lcr_in_information(struct chan_call *call, int message_type, union p
                if (!wake_global) {
                        wake_global = 1;
                        char byte = 0;
-                       write(wake_pipe[1], &byte, 1);
+                       int rc;
+                       rc = 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);
+               if (call->bridge_call) {
+                       CDEBUG(call, call->ast, "Call is connected, bridging.\n");
+                       bridge_message_if_bridged(call, message_type, param);
+               } else {
+                       if (call->dsp_dtmf) {
+                               if (!wake_global) {
+                                       wake_global = 1;
+                                       char byte = 0;
+                                       int rc;
+                                       rc = write(wake_pipe[1], &byte, 1);
+                               }
+                               strncat(call->queue_string, param->information.id, sizeof(call->queue_string)-1);
+                       } else
+                               CDEBUG(call, call->ast, "LCR's DTMF detection is disabled.\n");
+               }
        }
 }
 
@@ -1428,18 +1461,8 @@ static void lcr_in_information(struct chan_call *call, int message_type, union p
  */
 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. (ref=%d)\n", call->ref);
-               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 */
@@ -1476,18 +1499,17 @@ static void lcr_in_pattern(struct chan_call *call, int message_type, union param
        call->has_pattern = 1;
 
        /* request bchannel */
-       if (!call->bchannel) {
-               CDEBUG(call, call->ast, "Requesting B-channel. (ref=%d)\n", call->ref);
-               memset(&newparam, 0, sizeof(union parameter));
-               newparam.bchannel.type = BCHANNEL_REQUEST;
-               send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
-       }
+       CDEBUG(call, call->ast, "Requesting audio path (ref=%d)\n", call->ref);
+       memset(&newparam, 0, sizeof(union parameter));
+       send_message(MESSAGE_AUDIOPATH, 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);
+                       int rc;
+                       rc = write(wake_pipe[1], &byte, 1);
                }
                strncat(call->queue_string, "T", sizeof(call->queue_string)-1);
        }
@@ -1507,7 +1529,7 @@ void lcr_in_dtmf(struct chan_call *call, int val)
                return;
 
        if (!call->dsp_dtmf) {
-               CDEBUG(call, call->ast, "Recognised DTMF digit '%c', but ignoring. This is fixed in later mISDN driver.\n", val);
+               CDEBUG(call, call->ast, "Recognised DTMF digit '%c' by LCR, but ignoring. (disabled by option)\n", val);
                return;
        }
 
@@ -1517,7 +1539,8 @@ void lcr_in_dtmf(struct chan_call *call, int val)
        if (!wake_global) {
                wake_global = 1;
                char byte = 0;
-               write(wake_pipe[1], &byte, 1);
+               int rc;
+               rc = write(wake_pipe[1], &byte, 1);
        }
        strncat(call->queue_string, digit, sizeof(call->queue_string)-1);
 }
@@ -1527,103 +1550,12 @@ void lcr_in_dtmf(struct chan_call *call, int val)
  */
 int receive_message(int message_type, unsigned int ref, union parameter *param)
 {
-       struct bchannel *bchannel;
        struct chan_call *call;
        union parameter newparam;
+       int rc = 0;
 
        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);
-                               }
-                               /* ignore all dsp features, if it is a loopback interface */
-                               if (param->bchannel.isloopback)
-                                       call->nodsp = 1;
-
-                               /* 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->newref.direction) {
@@ -1664,14 +1596,15 @@ int receive_message(int message_type, unsigned int ref, union parameter *param)
                        else if (call->state == CHAN_LCR_STATE_RELEASE) {
                                /* send release */
                                if (call->cause)
-                                       send_release_and_import(call, call->cause, call->location);
+                                       send_release(call, call->cause, call->location);
                                else
-                                       send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
+                                       send_release(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
                                /* free call */
                                free_call(call);
                                return 0;
                        }
                }
+               send_message(MESSAGE_ENABLEKEYPAD, call->ref, &newparam);
                return 0;
        }
 
@@ -1741,11 +1674,25 @@ int receive_message(int message_type, unsigned int ref, union parameter *param)
                call->audiopath = param->audiopath;
                break;
 
+               case MESSAGE_TRAFFIC: // if remote audio connected or hold
+               {
+                       unsigned char *p = param->traffic.data;
+                       int i, len = param->traffic.len;
+                       for (i = 0; i < len; i++, p++)
+                               *p = flip_bits[*p];
+               }
+               rc = write(call->pipe[1], param->traffic.data, param->traffic.len);
+               break;
+
+               case MESSAGE_DTMF:
+               lcr_in_dtmf(call, param->dtmf);
+               break;
+
                default:
                CDEBUG(call, call->ast, "Message %d from LCR unhandled.\n", message_type);
                break;
        }
-       return 0;
+       return rc;
 }
 
 /*
@@ -1781,15 +1728,12 @@ again:
                if (!wake_global) {
                        wake_global = 1;
                        char byte = 0;
-                       write(wake_pipe[1], &byte, 1);
+                       int rc;
+                       rc = 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);
@@ -1933,8 +1877,9 @@ void close_socket(void)
 static int wake_event(struct lcr_fd *fd, unsigned int what, void *instance, int index)
 {
        char byte;
+       int rc;
 
-       read(wake_pipe[0], &byte, 1);
+       rc = read(wake_pipe[0], &byte, 1);
 
        wake_global = 0;
 
@@ -2058,8 +2003,6 @@ static void *chan_thread(void *arg)
        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);
 
@@ -2081,7 +2024,7 @@ static
 #if ASTERISK_VERSION_NUM < 100000
 struct ast_channel *lcr_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
 #else
-struct ast_channel *lcr_request(const char *type, struct ast_format_cap *format, struct ast_channel *requestor, void *data, int *cause)
+struct ast_channel *lcr_request(const char *type, struct ast_format_cap *format, const struct ast_channel *requestor, void *data, int *cause)
 #endif
 #else
 struct ast_channel *lcr_request(const char *type, int format, void *data, int *cause)
@@ -2090,8 +2033,10 @@ struct ast_channel *lcr_request(const char *type, int format, void *data, int *c
        char exten[256], *dial, *interface, *opt;
        struct ast_channel *ast;
        struct chan_call *call;
-       struct ast_party_redirecting *req_redir;
-       struct ast_party_caller *req_caller;
+#ifdef AST_1_8_OR_HIGHER
+       const struct ast_party_redirecting *req_redir;
+       const struct ast_party_caller *req_caller;
+#endif
 
        ast_mutex_lock(&chan_lock);
        CDEBUG(NULL, NULL, "Received request from Asterisk. (data=%s)\n", (char *)data);
@@ -2135,8 +2080,10 @@ struct ast_channel *lcr_request(const char *type, int format, void *data, int *c
 #if ASTERISK_VERSION_NUM < 110000
        ast->tech = &lcr_tech;
        ast->tech_pvt = (void *)1L; // set pointer or asterisk will not call
+#ifdef AST_1_8_OR_HIGHER
        req_redir = &requestor->redirecting;
        req_caller = &requestor->caller;
+#endif
 #else
        ast_channel_tech_set(ast, &lcr_tech);
        ast_channel_tech_pvt_set(ast, (void *)1L); // set pointer or asterisk will not call
@@ -2476,8 +2423,7 @@ static int lcr_call(struct ast_channel *ast, char *dest, int timeout)
        /* send MESSAGE_NEWREF */
        memset(&newparam, 0, sizeof(union parameter));
        newparam.newref.direction = 0; /* request from app */
-       if (!strcmp(call->interface, "pbx"))
-               newparam.newref.mode = 1;
+       strncpy(newparam.newref.interface, call->interface, sizeof(newparam.newref.interface) - 1);
        send_message(MESSAGE_NEWREF, 0, &newparam);
 
        /* set hdlc if capability requires hdlc */
@@ -2690,13 +2636,6 @@ static int lcr_answer(struct ast_channel *ast)
                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);
@@ -2744,13 +2683,13 @@ static int lcr_hangup(struct ast_channel *ast)
                CDEBUG(call, ast, "Releasing ref and freeing call instance.\n");
 #if ASTERISK_VERSION_NUM < 110000
                if (ast->hangupcause > 0)
-                       send_release_and_import(call, ast->hangupcause, LOCATION_PRIVATE_LOCAL);
+                       send_release(call, ast->hangupcause, LOCATION_PRIVATE_LOCAL);
 #else
                if (ast_channel_hangupcause(ast) > 0)
-                       send_release_and_import(call, ast_channel_hangupcause(ast), LOCATION_PRIVATE_LOCAL);
+                       send_release(call, ast_channel_hangupcause(ast), LOCATION_PRIVATE_LOCAL);
 #endif
                else
-                       send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
+                       send_release(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
                /* remove call */
                free_call(call);
                if (!pthread_equal(tid, chan_tid)) {
@@ -2778,8 +2717,11 @@ static int lcr_hangup(struct ast_channel *ast)
 
 static int lcr_write(struct ast_channel *ast, struct ast_frame *fr)
 {
+       union parameter newparam;
        struct chan_call *call;
        struct ast_frame * f = fr;
+       unsigned char *p, *q;
+       int len, l;
 
 #if ASTERISK_VERSION_NUM < 100000
 #ifdef AST_1_8_OR_HIGHER
@@ -2838,15 +2780,26 @@ static int lcr_write(struct ast_channel *ast, struct ast_frame *fr)
 #else
        call = ast_channel_tech_pvt(ast);
 #endif
-       if (!call) {
+       if (!call || !call->ref) {
+               /* drop the frame, if no ref exists, but return successfull delivery, or asterisk will abort connection */
                ast_mutex_unlock(&chan_lock);
                if (f != fr) {
                        ast_frfree(f);
                }
-               return -1;
+               return 0;
+       }
+       len = f->samples;
+       p = *((unsigned char **)&(f->data));
+       q = newparam.traffic.data;
+       memset(&newparam, 0, sizeof(union parameter));
+       while (len) {
+               l = (len > sizeof(newparam.traffic.data)) ? sizeof(newparam.traffic.data) : len;
+               newparam.traffic.len = l;
+               len -= l;
+               for (; l; l--)
+                       *q++ = flip_bits[*p++];
+               send_message(MESSAGE_TRAFFIC, call->ref, &newparam);
        }
-       if (call->bchannel && f->samples)
-               bchannel_transmit(call->bchannel, *((unsigned char **)&(f->data)), f->samples);
        ast_mutex_unlock(&chan_lock);
        if (f != fr) {
                ast_frfree(f);
@@ -2859,6 +2812,7 @@ static struct ast_frame *lcr_read(struct ast_channel *ast)
 {
        struct chan_call *call;
        int len = 0;
+       struct ast_frame *f = NULL;
 
        ast_mutex_lock(&chan_lock);
 #if ASTERISK_VERSION_NUM < 110000
@@ -2938,8 +2892,17 @@ static struct ast_frame *lcr_read(struct ast_channel *ast)
        }
        call->read_fr.delivery = ast_tv(0,0);
        *((unsigned char **)&(call->read_fr.data)) = call->read_buff;
+
+       if (call->dsp)
+               f = ast_dsp_process(ast, call->dsp, &call->read_fr);
+       if (f && f->frametype == AST_FRAME_DTMF)
+               CDEBUG(call, ast, "Asterisk detected inband DTMF: %c.\n", f->subclass.integer);
+
        ast_mutex_unlock(&chan_lock);
 
+       if (f && f->frametype == AST_FRAME_DTMF)
+               return f;
+
        return &call->read_fr;
 }
 
@@ -2948,7 +2911,7 @@ static int lcr_indicate(struct ast_channel *ast, int cond, const void *data, siz
        union parameter newparam;
        int res = 0;
        struct chan_call *call;
-       const struct tone_zone_sound *ts = NULL;
+       const struct ast_tone_zone_sound *ts = NULL;
 
        ast_mutex_lock(&chan_lock);
 #if ASTERISK_VERSION_NUM < 110000
@@ -3044,12 +3007,9 @@ static int lcr_indicate(struct ast_channel *ast, int cond, const void *data, siz
                case AST_CONTROL_PROGRESS:
                        CDEBUG(call, ast, "Received indicate AST_CONTROL_PROGRESS from Asterisk.\n");
                        /* 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);
-                       }
+                       CDEBUG(call, ast, "Requesting audio path.\n");
+                       memset(&newparam, 0, sizeof(union parameter));
+                       send_message(MESSAGE_AUDIOPATH, call->ref, &newparam);
                        break;
                case -1:
                        CDEBUG(call, ast, "Received indicate -1.\n");
@@ -3188,6 +3148,9 @@ enum ast_bridge_result lcr_bridge(struct ast_channel *ast1,
        struct ast_frame        *f;
        int                     bridge_id;
 
+/* bridge is disabled, because there is currerntly no concept to bridge mISDN channels */
+return AST_BRIDGE_FAILED;
+
        CDEBUG(NULL, NULL, "Received bridging request from Asterisk.\n");
 
        carr[0] = ast1;
@@ -3211,24 +3174,17 @@ enum ast_bridge_result lcr_bridge(struct ast_channel *ast1,
        /* join, if both call instances uses dsp
           ignore the case of fax detection here it may be benificial for ISDN fax machines or pass through.
        */
-       if (!call1->nodsp && !call2->nodsp) {
-               CDEBUG(NULL, NULL, "Both calls use DSP, bridging via DSP.\n");
+       CDEBUG(NULL, NULL, "Both calls use DSP, bridging via DSP.\n");
 
-               /* get bridge id and join */
-               bridge_id = new_bridge_id();
+       /* get bridge id and join */
+       bridge_id = new_bridge_id();
 
-               call1->bridge_id = bridge_id;
-               if (call1->bchannel)
-                       bchannel_join(call1->bchannel, bridge_id);
+       call1->bridge_id = bridge_id;
+       call2->bridge_id = bridge_id;
+       // FIXME: do bridiging
+       // bchannel_join(call1->bchannel, bridge_id);
+       // bchannel_join(call2->bchannel, bridge_id);
 
-               call2->bridge_id = bridge_id;
-               if (call2->bchannel)
-                       bchannel_join(call2->bchannel, bridge_id);
-       } else
-       if (call1->nodsp && call2->nodsp)
-               CDEBUG(NULL, NULL, "Both calls use no DSP, bridging in channel driver.\n");
-       else
-               CDEBUG(NULL, NULL, "One call uses no DSP, bridging in channel driver.\n");
        call1->bridge_call = call2;
        call2->bridge_call = call1;
 
@@ -3324,15 +3280,11 @@ enum ast_bridge_result lcr_bridge(struct ast_channel *ast1,
 #endif
        if (call1 && call1->bridge_id) {
                call1->bridge_id = 0;
-               if (call1->bchannel)
-                       bchannel_join(call1->bchannel, 0);
                if (call1->bridge_call)
                        call1->bridge_call->bridge_call = NULL;
        }
        if (call2 && call1->bridge_id) {
                call2->bridge_id = 0;
-               if (call2->bchannel)
-                       bchannel_join(call2->bchannel, 0);
                if (call2->bridge_call)
                        call2->bridge_call->bridge_call = NULL;
        }
@@ -3503,6 +3455,14 @@ static int lcr_config_exec(struct ast_channel *ast, void *data, char **argv)
                apply_opt(call, (char *)argv[0]);
                #endif
 
+               /* send options */
+               if (call->tx_queue) {
+                       union parameter newparam;
+
+                       memset(&newparam, 0, sizeof(union parameter));
+                       newparam.queue = call->tx_queue * 8;
+                       send_message(MESSAGE_DISABLE_DEJITTER, call->ref, &newparam);
+               }
        else
                CERROR(NULL, ast, "lcr_config app not called by chan_lcr channel.\n");
 
@@ -3539,20 +3499,6 @@ int load_module(void)
        ast_mutex_init(&chan_lock);
        ast_mutex_init(&log_lock);
 
-       if (bchannel_initialize()) {
-               CERROR(NULL, NULL, "Unable to open mISDN device\n");
-               close_socket();
-
-               #ifdef LCR_FOR_ASTERISK
-               return AST_MODULE_LOAD_DECLINE;
-               #endif
-
-               #ifdef LCR_FOR_CALLWEAVER
-               return 0;
-               #endif
-       }
-       mISDN_created = 1;
-
        #if ASTERISK_VERSION_NUM < 100000
        lcr_tech.capabilities = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
        #else
@@ -3565,7 +3511,6 @@ int load_module(void)
        #endif
        if (ast_channel_register(&lcr_tech)) {
                CERROR(NULL, NULL, "Unable to register channel class\n");
-               bchannel_deinitialize();
                close_socket();
 
                #ifdef LCR_FOR_ASTERISK
@@ -3591,20 +3536,23 @@ int load_module(void)
                                 "\n"
                                 "The available options are:\n"
                                 "    d - Send display text on called phone, text is the optarg.\n"
-                                "    n - Don't detect dtmf tones on called channel.\n"
+                                "    n - Don't detect dtmf tones from LCR.\n"
                                 "    h - Force data call (HDLC).\n"
-                                "    t - Disable mISDN_dsp features (required for fax application).\n"
                                 "    q - Add queue to make fax stream seamless (required for fax app).\n"
                                 "        Use queue size in miliseconds for optarg. (try 250)\n"
-                                "    f - Adding fax detection. It it timeouts, mISDN_dsp is used.\n"
-                                "        Use time to detect for optarg.\n"
+                                "    a - Adding DTMF detection.\n"
+                                "    f - Adding fax detection.\n"
+#if 0
                                 "    c - Make crypted outgoing call, optarg is keyindex.\n"
                                 "    e - Perform echo cancelation on this channel.\n"
+#endif
                                 "        Takes mISDN pipeline option as optarg.\n"
-                                "    s - Send Non Inband DTMF as inband.\n"
+                                "    s - Send Non Inband DTMF as inband. (disables LCR's DTMF)\n"
                                 "    r - re-buffer packets (160 bytes). Required for some SIP-phones and fax applications.\n"
+#if 0
                                 "   vr - rxgain control\n"
                                 "   vt - txgain control\n"
+#endif
                                 "        Volume changes at factor 2 ^ optarg.\n"
                                 "    k - use keypad to dial this call.\n"
                                 "\n"
@@ -3628,7 +3576,6 @@ int load_module(void)
 
        if ((pthread_create(&chan_tid, NULL, chan_thread, NULL)<0)) {
                /* failed to create thread */
-               bchannel_deinitialize();
                close_socket();
                ast_channel_unregister(&lcr_tech);
 
@@ -3665,11 +3612,6 @@ int unload_module(void)
 
        ast_unregister_application("lcr_config");
 
-       if (mISDN_created) {
-               bchannel_deinitialize();
-               mISDN_created = 0;
-       }
-
        if (lcr_sock >= 0) {
                close(lcr_sock);
                lcr_sock = -1;