Data-Over-Voice
[lcr.git] / gsm_bs.cpp
index 9608be6..97be942 100644 (file)
@@ -14,6 +14,8 @@
 
 struct lcr_gsm *gsm_bs = NULL;
 
+#define PAYLOAD_TYPE_GSM 3
+
 /*
  * DTMF stuff
  */
@@ -62,19 +64,138 @@ Pgsm_bs::~Pgsm_bs()
        PDEBUG(DEBUG_GSM, "Destroyed GSM BS process(%s).\n", p_name);
 }
 
+static const char *media_type2name(unsigned char media_type) {
+       switch (media_type) {
+       case MEDIA_TYPE_ULAW:
+               return "PCMU";
+       case MEDIA_TYPE_ALAW:
+               return "PCMA";
+       case MEDIA_TYPE_GSM:
+               return "GSM";
+       case MEDIA_TYPE_GSM_HR:
+               return "GSM-HR";
+       case MEDIA_TYPE_GSM_EFR:
+               return "GSM-EFR";
+       case MEDIA_TYPE_AMR:
+               return "AMR";
+       }
+
+       return "UKN";
+}
+
+/* PROCEEDING INDICATION (from MS) */
+void Pgsm_bs::call_conf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
+{
+       int media_types[8];
+       unsigned char payload_types[8];
+       int payloads = 0;
+
+       gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
+       if (mncc->fields & MNCC_F_CAUSE) {
+               add_trace("cause", "coding", "%d", mncc->cause.coding);
+               add_trace("cause", "location", "%", mncc->cause.location);
+               add_trace("cause", "value", "%", mncc->cause.value);
+       }
+       end_trace();
+
+       new_state(PORT_STATE_OUT_PROCEEDING);
+
+       /* get list of offered payload types
+        * if list ist empty, the FR V1 is selected */
+       select_payload_type(mncc, payload_types, media_types, &payloads, sizeof(payload_types));
+       /* if no given payload type is supported, we select from channel type */
+       if (!payloads) {
+               switch (mncc->lchan_type) {
+               case GSM_LCHAN_TCH_F:
+                       media_types[0] = MEDIA_TYPE_GSM;
+                       payload_types[0] = PAYLOAD_TYPE_GSM;
+                       payloads = 1;
+                       break;
+               case GSM_LCHAN_TCH_H:
+                       media_types[0] = MEDIA_TYPE_GSM_HR;
+                       payload_types[0] = 96; /* dynamic */
+                       payloads = 1;
+                       break;
+               default:
+                       mncc = create_mncc(MNCC_REL_REQ, callref);
+                       gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
+                       mncc->fields |= MNCC_F_CAUSE;
+                       mncc->cause.coding = 3;
+                       mncc->cause.location = 1;
+                       mncc->cause.value = 65;
+                       add_trace("cause", "coding", "%d", mncc->cause.coding);
+                       add_trace("cause", "location", "%d", mncc->cause.location);
+                       add_trace("cause", "value", "%d", mncc->cause.value);
+                       add_trace("reason", NULL, "Given lchan not supported");
+                       end_trace();
+                       send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
+                       new_state(PORT_STATE_RELEASE);
+                       trigger_work(&p_g_delete);
+                       return;
+               }
+       }
+
+       /* select first payload type that matches the rtp list */
+       if (p_g_rtp_bridge) {
+               int i, j;
+
+               for (i = 0; i < p_g_rtp_payloads; i++) {
+                       for (j = 0; j < payloads; j++) {
+                               if (p_g_rtp_media_types[i] == media_types[j])
+                                       break;
+                       }
+                       if (j < payloads)
+                               break;
+               }
+               if (i == p_g_rtp_payloads) {
+                       struct lcr_msg *message;
+
+                       /* payload offered by remote RTP is not supported */
+                       message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
+                       message->param.disconnectinfo.cause = 65;
+                       message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
+                       message_put(message);
+                       /* send release */
+                       mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
+                       gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
+                       mncc->fields |= MNCC_F_CAUSE;
+                       mncc->cause.coding = 3;
+                       mncc->cause.location = LOCATION_PRIVATE_LOCAL;
+                       mncc->cause.value = 65;
+                       add_trace("cause", "coding", "%d", mncc->cause.coding);
+                       add_trace("cause", "location", "%d", mncc->cause.location);
+                       add_trace("cause", "value", "%d", mncc->cause.value);
+                       add_trace("reason", NULL, "None of the payload types are supported by MS");
+                       end_trace();
+                       send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
+                       new_state(PORT_STATE_RELEASE);
+                       trigger_work(&p_g_delete);
+
+                       return;
+               }
+               modify_lchan(p_g_rtp_media_types[i]);
+               /* use the payload type from received rtp list, not from locally generated payload types */
+               p_g_payload_type = p_g_rtp_payload_types[i];
+       } else {
+               /* modify to first given payload */
+               modify_lchan(media_types[0]);
+               p_g_payload_type = payload_types[0];
+       }
+}
+
 /* DTMF INDICATION */
 void Pgsm_bs::start_dtmf_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
 {
        struct gsm_mncc *resp;
 
-       gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
+       gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
        add_trace("keypad", NULL, "%c", mncc->keypad);
        end_trace();
        SPRINT(p_dialinginfo.id, "%c", mncc->keypad);
        p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
 
        /* send resp */
-       gsm_trace_header(p_g_interface_name, this, MNCC_START_DTMF_RSP, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, MNCC_START_DTMF_RSP, DIRECTION_OUT);
        add_trace("keypad", NULL, "%c", mncc->keypad);
        end_trace();
        resp = create_mncc(MNCC_START_DTMF_RSP, p_g_callref);
@@ -83,15 +204,24 @@ void Pgsm_bs::start_dtmf_ind(unsigned int msg_type, unsigned int callref, struct
        send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 
        if (p_g_rtp_bridge) {
-               class Port *remote = bridge_remote();
-
-               if (remote) {
-                       struct lcr_msg *message;
-
-                       /* send dtmf information, because we bridge RTP directly */
-                       message = message_create(0, remote->p_serial, EPOINT_TO_PORT, MESSAGE_DTMF);
-                       message->param.dtmf = mncc->keypad;
-                       message_put(message);
+               /* if two members are bridged */
+               if (p_bridge && p_bridge->first && p_bridge->first->next && !p_bridge->first->next->next) {
+                       class Port *remote = NULL;
+
+                       /* select other member */
+                       if (p_bridge->first->port == this)
+                               remote = p_bridge->first->next->port;
+                       if (p_bridge->first->next->port == this)
+                               remote = p_bridge->first->port;
+
+                       if (remote) {
+                               struct lcr_msg *message;
+
+                               /* send dtmf information, because we bridge RTP directly */
+                               message = message_create(0, remote->p_serial, EPOINT_TO_PORT, MESSAGE_DTMF);
+                               message->param.dtmf = mncc->keypad;
+                               message_put(message);
+                       }
                }
        } else {
                /* generate DTMF tones, since we do audio forwarding inside LCR */
@@ -124,12 +254,12 @@ void Pgsm_bs::stop_dtmf_ind(unsigned int msg_type, unsigned int callref, struct
 {
        struct gsm_mncc *resp;
 
-       gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
+       gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
        add_trace("keypad", NULL, "%c", mncc->keypad);
        end_trace();
 
        /* send resp */
-       gsm_trace_header(p_g_interface_name, this, MNCC_STOP_DTMF_RSP, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, MNCC_STOP_DTMF_RSP, DIRECTION_OUT);
        add_trace("keypad", NULL, "%c", mncc->keypad);
        end_trace();
        resp = create_mncc(MNCC_STOP_DTMF_RSP, p_g_callref);
@@ -146,7 +276,7 @@ void Pgsm_bs::hold_ind(unsigned int msg_type, unsigned int callref, struct gsm_m
        struct lcr_msg *message;
        struct gsm_mncc *resp, *frame;
 
-       gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
+       gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
        end_trace();
 
        /* notify the hold of call */
@@ -156,14 +286,14 @@ void Pgsm_bs::hold_ind(unsigned int msg_type, unsigned int callref, struct gsm_m
        message_put(message);
 
        /* acknowledge hold */
-       gsm_trace_header(p_g_interface_name, this, MNCC_HOLD_CNF, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, MNCC_HOLD_CNF, DIRECTION_OUT);
        end_trace();
        resp = create_mncc(MNCC_HOLD_CNF, p_g_callref);
        send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 
        /* disable audio */
        if (p_g_tch_connected) { /* it should be true */
-               gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_DROP, DIRECTION_OUT);
+               gsm_trace_header(p_interface_name, this, MNCC_FRAME_DROP, DIRECTION_OUT);
                end_trace();
                frame = create_mncc(MNCC_FRAME_DROP, p_g_callref);
                send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
@@ -178,7 +308,7 @@ void Pgsm_bs::retr_ind(unsigned int msg_type, unsigned int callref, struct gsm_m
        struct lcr_msg *message;
        struct gsm_mncc *resp, *frame;
 
-       gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
+       gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
        end_trace();
 
        /* notify the retrieve of call */
@@ -188,14 +318,14 @@ void Pgsm_bs::retr_ind(unsigned int msg_type, unsigned int callref, struct gsm_m
        message_put(message);
 
        /* acknowledge retr */
-       gsm_trace_header(p_g_interface_name, this, MNCC_RETRIEVE_CNF, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, MNCC_RETRIEVE_CNF, DIRECTION_OUT);
        end_trace();
        resp = create_mncc(MNCC_RETRIEVE_CNF, p_g_callref);
        send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
 
        /* enable audio */
        if (!p_g_tch_connected) { /* it should be true */
-               gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
+               gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
                end_trace();
                frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
                send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
@@ -204,6 +334,110 @@ void Pgsm_bs::retr_ind(unsigned int msg_type, unsigned int callref, struct gsm_m
 }
 
 /*
+ * select payload type by given list or GSM V1 FR 
+ * return the payload type or 0 if not given 
+ */
+
+void Pgsm_bs::select_payload_type(struct gsm_mncc *mncc, unsigned char *payload_types, int *media_types, int *payloads, int max_payloads)
+{
+       int media_type;
+       unsigned char payload_type;
+       int half;
+       void *encoder, *decoder;
+
+       *payloads = 0;
+
+       gsm_trace_header(p_interface_name, this, 1 /* codec negotioation */, DIRECTION_NONE);
+       if ((mncc->fields & MNCC_F_BEARER_CAP)) {
+               /* select preferred payload type from list */
+               int i;
+               unsigned char dynamic_type = 96;
+
+               add_trace("bearer", "capa", "given by MS");
+               for (i = 0; mncc->bearer_cap.speech_ver[i] >= 0; i++) {
+                       half = 0;
+                       /* select payload type we support */
+                       switch (mncc->bearer_cap.speech_ver[i]) {
+                       case 0:
+                               add_trace("speech", "version", "Full Rate given");
+                               media_type = MEDIA_TYPE_GSM;
+                               payload_type = PAYLOAD_TYPE_GSM;
+                               encoder = p_g_fr_encoder;
+                               decoder = p_g_fr_decoder;
+                               break;
+                       case 2:
+                               add_trace("speech", "version", "EFR given");
+                               media_type = MEDIA_TYPE_GSM_EFR;
+                               payload_type = dynamic_type++;
+                               encoder = p_g_amr_encoder;
+                               decoder = p_g_amr_decoder;
+                               break;
+                       case 4:
+                               add_trace("speech", "version", "AMR given");
+                               media_type = MEDIA_TYPE_AMR;
+                               payload_type = dynamic_type++;
+                               encoder = p_g_amr_encoder;
+                               decoder = p_g_amr_decoder;
+                               break;
+                       case 1:
+                               add_trace("speech", "version", "Half Rate given");
+                               media_type = MEDIA_TYPE_GSM_HR;
+                               payload_type = dynamic_type++;
+                               encoder = p_g_hr_encoder;
+                               decoder = p_g_hr_decoder;
+                               half = 1;
+                               break;
+                       case 5:
+                               add_trace("speech", "version", "AMR Half Rate given");
+                               media_type = MEDIA_TYPE_AMR;
+                               payload_type = dynamic_type++;
+                               encoder = p_g_amr_encoder;
+                               decoder = p_g_amr_decoder;
+                               half = 1;
+                               break;
+                       default:
+                               add_trace("speech", "version", "%d given", mncc->bearer_cap.speech_ver[i]);
+                               media_type = 0;
+                               payload_type = 0;
+                       }
+                       /* wen don't support it, so we check the next */
+                       if (!media_type) {
+                               add_trace("speech", "ignored", "Not supported by LCR");
+                               continue;
+                       }
+                       if (!half && mncc->lchan_type != GSM_LCHAN_TCH_F) {
+                               add_trace("speech", "ignored", "Not TCH/F");
+                               continue;
+                       }
+                       if (half && mncc->lchan_type != GSM_LCHAN_TCH_H) {
+                               add_trace("speech", "ignored", "Not TCH/H");
+                               continue;
+                       }
+                       if (!p_g_rtp_bridge) {
+                               if (!encoder || !decoder) {
+                                       add_trace("speech", "ignored", "Codec not supported");
+                                       continue;
+                               }
+                       }
+                       if (*payloads <= max_payloads) {
+                               media_types[*payloads] = media_type;
+                               payload_types[*payloads] = payload_type;
+                               (*payloads)++;
+                       }
+               }
+       } else {
+               add_trace("bearer", "capa", "not given by MS");
+               add_trace("speech", "version", "Full Rate given");
+               media_types[0] = MEDIA_TYPE_GSM;
+               payload_types[0] = PAYLOAD_TYPE_GSM;
+               *payloads = 1;
+       }
+       if (!(*payloads))
+               add_trace("error", "", "All given payload types unsupported");
+       end_trace();
+}
+
+/*
  * handles all indications
  */
 /* SETUP INDICATION */
@@ -211,28 +445,27 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
 {
        class Endpoint *epoint;
        struct lcr_msg *message;
-       struct gsm_mncc *mode, *proceeding, *frame;
-       struct interface *interface = interface_first;
+       struct gsm_mncc *proceeding, *frame;
+       struct interface *interface;
+       int media_types[8];
+       unsigned char payload_types[8];
+       int payloads = 0;
 
-       while (interface) {
-               if (!strcmp(interface->name, p_g_interface_name))
-                       break;
-               interface = interface->next;
-       }
+       interface = getinterfacebyname(p_interface_name);
        if (!interface) {
-               PERROR("Cannot find interface %s.\n", p_g_interface_name);
+               PERROR("Cannot find interface %s.\n", p_interface_name);
                return;
        }
 
        /* process given callref */
-       gsm_trace_header(p_g_interface_name, this, 0, DIRECTION_IN);
+       gsm_trace_header(p_interface_name, this, 0, DIRECTION_IN);
        add_trace("callref", "new", "0x%x", callref);
        if (p_g_callref) {
                /* release in case the ID is already in use */
                add_trace("error", NULL, "callref already in use");
                end_trace();
                mncc = create_mncc(MNCC_REJ_REQ, callref);
-               gsm_trace_header(p_g_interface_name, this, MNCC_REJ_REQ, DIRECTION_OUT);
+               gsm_trace_header(p_interface_name, this, MNCC_REJ_REQ, DIRECTION_OUT);
                mncc->fields |= MNCC_F_CAUSE;
                mncc->cause.coding = 3;
                mncc->cause.location = 1;
@@ -262,7 +495,7 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
        SCPY(p_callerinfo.imsi, mncc->imsi);
        p_callerinfo.screen = INFO_SCREEN_NETWORK;
        p_callerinfo.ntype = INFO_NTYPE_UNKNOWN;
-       SCPY(p_callerinfo.interface, p_g_interface_name);
+       SCPY(p_callerinfo.interface, p_interface_name);
 
        /* dialing information */
        SCAT(p_dialinginfo.id, mncc->called.number);
@@ -286,17 +519,56 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
        p_dialinginfo.sending_complete = 1;
 
        /* bearer capability */
-       // todo
        p_capainfo.bearer_capa = INFO_BC_SPEECH;
        p_capainfo.bearer_info1 = (options.law=='a')?3:2;
        p_capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
        p_capainfo.source_mode = B_MODE_TRANSPARENT;
        p_g_mode = p_capainfo.source_mode;
 
+       /* get list of offered payload types
+        * if list ist empty, the FR V1 is selected */
+       select_payload_type(mncc, payload_types, media_types, &payloads, sizeof(payload_types));
+       /* if no given payload type is supported, we select from channel type */
+       if (!payloads) {
+               switch (mncc->lchan_type) {
+               case GSM_LCHAN_TCH_F:
+                       media_types[0] = MEDIA_TYPE_GSM;
+                       payload_types[0] = PAYLOAD_TYPE_GSM;
+                       payloads = 1;
+                       break;
+               case GSM_LCHAN_TCH_H:
+                       media_types[0] = MEDIA_TYPE_GSM_HR;
+                       payload_types[0] = 96; /* dynamic */
+                       payloads = 1;
+                       break;
+               default:
+                       mncc = create_mncc(MNCC_REJ_REQ, callref);
+                       gsm_trace_header(p_interface_name, this, MNCC_REJ_REQ, DIRECTION_OUT);
+                       mncc->fields |= MNCC_F_CAUSE;
+                       mncc->cause.coding = 3;
+                       mncc->cause.location = 1;
+                       mncc->cause.value = 65;
+                       add_trace("cause", "coding", "%d", mncc->cause.coding);
+                       add_trace("cause", "location", "%d", mncc->cause.location);
+                       add_trace("cause", "value", "%d", mncc->cause.value);
+                       add_trace("reason", NULL, "Given lchan not supported");
+                       end_trace();
+                       send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
+                       new_state(PORT_STATE_RELEASE);
+                       trigger_work(&p_g_delete);
+                       return;
+               }
+       }
+#if 0
+       /* if no given payload type is supported, we reject the call */
+       if (!payloads) {
+       }
+#endif
+
        /* useruser */
 
        /* what infos did we got ... */
-       gsm_trace_header(p_g_interface_name, this, msg_type, DIRECTION_IN);
+       gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
        if (p_callerinfo.id[0])
                add_trace("calling", "number", "%s", p_callerinfo.id);
        else
@@ -313,17 +585,12 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
        epoint->ep_app = new_endpointapp(epoint, 0, interface->app); //incoming
        epointlist_new(epoint->ep_serial);
 
-       /* modify lchan to GSM codec V1 */
-       gsm_trace_header(p_g_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
-       mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
-       mode->lchan_mode = 0x01; /* GSM V1 */
-       mode->lchan_type = 0x02;
-       add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
-       end_trace();
-       send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
+       /* modify lchan in case of no rtp bridge */
+       if (!p_g_rtp_bridge)
+               modify_lchan(media_types[0]);
 
        /* send call proceeding */
-       gsm_trace_header(p_g_interface_name, this, MNCC_CALL_PROC_REQ, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, MNCC_CALL_PROC_REQ, DIRECTION_OUT);
        proceeding = create_mncc(MNCC_CALL_PROC_REQ, p_g_callref);
        if (p_g_tones) {
                proceeding->fields |= MNCC_F_PROGRESS;
@@ -340,7 +607,7 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
        new_state(PORT_STATE_IN_PROCEEDING);
 
        if (p_g_tones && !p_g_tch_connected) { /* only if ... */
-               gsm_trace_header(p_g_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
+               gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
                end_trace();
                frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
                send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
@@ -357,15 +624,21 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
        SCPY((char *)message->param.setup.useruser.data, (char *)mncc->useruser.info);
        message->param.setup.useruser.len = strlen(mncc->useruser.info);
        message->param.setup.useruser.protocol = mncc->useruser.proto;
-       message->param.setup.rtpinfo.payload_type = 3; /* FIXME: receive payload type from peer */
-
        if (p_g_rtp_bridge) {
                struct gsm_mncc_rtp *rtp;
+               int i;
 
                PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding setup\n");
                p_g_setup_pending = message;
                rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
                send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
+
+               for (i = 0; i < (int)sizeof(message->param.setup.rtpinfo.payload_types) && i < payloads; i++) {
+                       message->param.setup.rtpinfo.media_types[i] = media_types[i];
+                       message->param.setup.rtpinfo.payload_types[i] = payload_types[i];
+                       message->param.setup.rtpinfo.payloads++;
+               }
+
        } else
                message_put(message);
 
@@ -376,7 +649,6 @@ void Pgsm_bs::setup_ind(unsigned int msg_type, unsigned int callref, struct gsm_
  */
 int message_bsc(struct lcr_gsm *lcr_gsm, int msg_type, void *arg)
 {
-       struct interface *interface = lcr_gsm->interface;
        struct gsm_mncc *mncc = (struct gsm_mncc *)arg;
        unsigned int callref = mncc->callref;
        class Port *port;
@@ -401,7 +673,11 @@ int message_bsc(struct lcr_gsm *lcr_gsm, int msg_type, void *arg)
                port = port->next;
        }
 
-       if (msg_type == GSM_TCHF_FRAME) {
+       if (msg_type == GSM_TCHF_FRAME
+        || msg_type == GSM_TCHF_FRAME_EFR
+        || msg_type == GSM_TCHH_FRAME
+        || msg_type == GSM_TCH_FRAME_AMR
+        || msg_type == GSM_BAD_FRAME) {
                if (port) {
                        /* inject DTMF, if enabled */
                        if (pgsm_bs->p_g_dtmf) {
@@ -418,30 +694,26 @@ int message_bsc(struct lcr_gsm *lcr_gsm, int msg_type, void *arg)
                        } else
                                pgsm_bs->frame_receive(arg);
                        /* if we do not bridge we need to inject audio, if available */
-                       if (!pgsm_bs->p_bridge) {
+                       if (!pgsm_bs->p_bridge || pgsm_bs->p_tone_name[0]) {
                                unsigned char data[160];
                                int i;
 
                                i = pgsm_bs->read_audio(data, 160);
                                if (i)
-                                       pgsm_bs->bridge_rx(data, i);
+                                       pgsm_bs->audio_send(data, i);
                        }
                }
                return 0;
        }
 
        if (!port) {
+               struct interface *interface;
+
                if (msg_type != MNCC_SETUP_IND)
                        return(0);
-#if 0
-               /* find gsm port */
-               mISDNport = mISDNport_first;
-               while(mISDNport) {
-                       if (mISDNport->gsm_bs)
-                               break;
-                       mISDNport = mISDNport->next;
-               }
-               if (!mISDNport) {
+
+               interface = getinterfacebyname(lcr_gsm->interface_name);
+               if (!interface) {
                        struct gsm_mncc *rej;
 
                        rej = create_mncc(MNCC_REJ_REQ, callref);
@@ -453,11 +725,11 @@ int message_bsc(struct lcr_gsm *lcr_gsm, int msg_type, void *arg)
                        add_trace("cause", "coding", "%d", rej->cause.coding);
                        add_trace("cause", "location", "%d", rej->cause.location);
                        add_trace("cause", "value", "%d", rej->cause.value);
+                       add_trace("reason", NULL, "interface %s not found", lcr_gsm->interface_name);
                        end_trace();
                        send_and_free_mncc(lcr_gsm, rej->msg_type, rej);
                        return 0;
                }
-#endif
                /* creating port object, transparent until setup with hdlc */
                SPRINT(name, "%s-%d-in", interface->name, 0);
                if (!(pgsm_bs = new Pgsm_bs(PORT_TYPE_GSM_BS_IN, name, NULL, interface)))
@@ -535,6 +807,13 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
        struct lcr_msg *message;
        struct epoint_list *epointlist;
        struct gsm_mncc *mncc;
+       struct interface *interface;
+
+       interface = getinterfacebyname(p_interface_name);
+       if (!interface) {
+               PERROR("Cannot find interface %s.\n", p_interface_name);
+               return;
+       }
 
        /* copy setup infos to port */
        memcpy(&p_callerinfo, &param->setup.callerinfo, sizeof(p_callerinfo));
@@ -544,7 +823,7 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
 
        /* no GSM MNCC connection */
        if (p_g_lcr_gsm->mncc_lfd.fd < 0) {
-               gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
+               gsm_trace_header(p_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
                add_trace("failure", NULL, "No MNCC connection.");
                end_trace();
                message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
@@ -558,7 +837,7 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
 
        /* no number */
        if (!p_dialinginfo.id[0]) {
-               gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
+               gsm_trace_header(p_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
                add_trace("failure", NULL, "No dialed subscriber given.");
                end_trace();
                message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
@@ -570,9 +849,47 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
                return;
        }
 
+       /* unsupported codec for RTP bridge */
+       if (param->setup.rtpinfo.port) {
+               int i;
+
+               p_g_rtp_payloads = 0;
+               gsm_trace_header(p_interface_name, this, 1 /* codec negotioation */, DIRECTION_NONE);
+               for (i = 0; i < param->setup.rtpinfo.payloads; i++) {
+                       switch (param->setup.rtpinfo.media_types[i]) {
+                       case MEDIA_TYPE_GSM:
+                       case MEDIA_TYPE_GSM_EFR:
+                       case MEDIA_TYPE_AMR:
+                       case MEDIA_TYPE_GSM_HR:
+                               add_trace("rtp", "payload", "%s:%d supported", media_type2name(param->setup.rtpinfo.media_types[i]), param->setup.rtpinfo.payload_types[i]);
+                               if (p_g_rtp_payloads < (int)sizeof(p_g_rtp_payload_types)) {
+                                       p_g_rtp_media_types[p_g_rtp_payloads] = param->setup.rtpinfo.media_types[i];
+                                       p_g_rtp_payload_types[p_g_rtp_payloads] = param->setup.rtpinfo.payload_types[i];
+                                       p_g_rtp_payloads++;
+                               }
+                               break;
+                       default:
+                               add_trace("rtp", "payload", "%s:%d unsupported", media_type2name(param->setup.rtpinfo.media_types[i]), param->setup.rtpinfo.payload_types[i]);
+                       }
+               }
+               end_trace();
+               if (!p_g_rtp_payloads) {
+                       gsm_trace_header(p_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
+                       add_trace("failure", NULL, "No payload given that is supported by GSM");
+                       end_trace();
+                       message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+                       message->param.disconnectinfo.cause = 65;
+                       message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
+                       message_put(message);
+                       new_state(PORT_STATE_RELEASE);
+                       trigger_work(&p_g_delete);
+                       return;
+               }
+       }
+
 //             SCPY(&p_m_tones_dir, param->setup.ext.tones_dir);
        /* screen outgoing caller id */
-       do_screen(1, p_callerinfo.id, sizeof(p_callerinfo.id), &p_callerinfo.ntype, &p_callerinfo.present, p_g_interface_name);
+       do_screen(1, p_callerinfo.id, sizeof(p_callerinfo.id), &p_callerinfo.ntype, &p_callerinfo.present, p_interface_name);
 
        /* attach only if not already */
        epointlist = p_epointlist;
@@ -585,12 +902,12 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
                epointlist_new(epoint_id);
 
        /* creating l3id */
-       gsm_trace_header(p_g_interface_name, this, 0, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, 0, DIRECTION_OUT);
        p_g_callref = new_callref++;
        add_trace("callref", "new", "0x%x", p_g_callref);
        end_trace();
 
-       gsm_trace_header(p_g_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
+       gsm_trace_header(p_interface_name, this, MNCC_SETUP_REQ, DIRECTION_OUT);
        mncc = create_mncc(MNCC_SETUP_REQ, p_g_callref);
        /* caller information */
        mncc->fields |= MNCC_F_CALLING;
@@ -699,8 +1016,14 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
                add_trace("redir", "screen", "%d", mncc->redirecting.screen);
                add_trace("redir", "number", "%s", mncc->redirecting.number);
        }
-       /* bearer capability */
-       //todo
+
+       if (interface->gsm_bs_hr) {
+               add_trace("lchan", "type", "TCH/H or TCH/F");
+               mncc->lchan_type = GSM_LCHAN_TCH_H;
+       } else {
+               add_trace("lchan", "type", "TCH/F");
+               mncc->lchan_type = GSM_LCHAN_TCH_F;
+       }
 
        end_trace();
        send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
@@ -710,8 +1033,6 @@ void Pgsm_bs::message_setup(unsigned int epoint_id, int message_id, union parame
        message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
        message_put(message);
 
-       new_state(PORT_STATE_OUT_PROCEEDING);
-
        /* RTP bridge */
        if (param->setup.rtpinfo.port) {
                p_g_rtp_bridge = 1;
@@ -766,7 +1087,7 @@ int gsm_bs_init(struct interface *interface)
        /* create gsm instance */
        gsm_bs = (struct lcr_gsm *)MALLOC(sizeof(struct lcr_gsm));
 
-       gsm_bs->interface = interface;
+       SCPY(gsm_bs->interface_name, interface->name);
        gsm_bs->type = LCR_GSM_TYPE_NETWORK;
        gsm_bs->sun.sun_family = AF_UNIX;
        SCPY(gsm_bs->sun.sun_path, "/tmp/bsc_mncc");