+void gsm_trace_facility(unsigned char *fac_ie, unsigned char fac_len)
+{
+ char debug[GSM_MAX_FACILITY * 3 + 1];
+ int i;
+
+ i = 0;
+ while(i < fac_len) {
+ UPRINT(debug+(i*3), " %02x", fac_ie[i]);
+ i++;
+ }
+ debug[i*3] = '\0';
+ add_trace("facility", NULL, "%s", debug[0]?debug+1:"<none>");
+}
+
+/* encode facility IE */
+void Pgsm_bs::enc_ie_facility(struct gsm_mncc *mncc, int operation_code, int error_code, unsigned char invoke_id)
+{
+ unsigned char *fac_ie, fac_len;
+
+ fac_ie = (unsigned char *)mncc->facility.info;
+
+ mncc->fields |= MNCC_F_FACILITY;
+ if (operation_code >= 0) {
+ fac_len = 8;
+ fac_ie[0] = 0xa2;
+ fac_ie[1] = 6;
+ fac_ie[2] = 0x02; /* invoke ID */
+ fac_ie[3] = 1;
+ fac_ie[4] = invoke_id;
+ fac_ie[5] = 0x02; /* Operation Code */
+ fac_ie[6] = 1;
+ fac_ie[7] = 124; /* buildMPTY */
+ fac_ie[7] = operation_code;
+ }
+ if (error_code >= 0) {
+ fac_len = 8;
+ fac_ie[0] = 0xa3;
+ fac_ie[1] = 6;
+ fac_ie[2] = 0x02; /* invoke ID */
+ fac_ie[3] = 1;
+ fac_ie[4] = invoke_id;
+ fac_ie[5] = 0x02; /* Error Code */
+ fac_ie[6] = 1;
+ fac_ie[7] = error_code;
+ }
+ mncc->facility.len = fac_len;
+}
+
+/* send facility request */
+void Pgsm_bs::facility_req(int operation_code, int error_code, unsigned char invoke_id)
+{
+ struct gsm_mncc *mncc;
+
+ gsm_trace_header(p_interface_name, this, MNCC_FACILITY_REQ, DIRECTION_OUT);
+ mncc = create_mncc(MNCC_FACILITY_REQ, p_g_callref);
+
+ enc_ie_facility(mncc, operation_code, error_code, invoke_id);
+
+ gsm_trace_facility((unsigned char *)mncc->facility.info, mncc->facility.len);
+ end_trace();
+ send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
+}
+
+/* FACILITY INDICATION */
+void Pgsm_bs::facility_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
+{
+ unsigned char *fac_ie, fac_len;
+ unsigned char comp_type, comp_len, *comp_val;
+ unsigned char invoke = 0, invoke_id = 0;
+ unsigned char operation = 0, operation_code = 0;
+ struct lcr_msg *message;
+ int i;
+
+ if (mncc->fields & MNCC_F_FACILITY) {
+ fac_ie = (unsigned char *)mncc->facility.info;
+ fac_len = mncc->facility.len;
+
+ gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
+ gsm_trace_facility(fac_ie, fac_len);
+ end_trace();
+ } else
+ return;
+
+ /* facility */
+ if (fac_len<=2)
+ return;
+ /* component tag */
+ if (fac_ie[1] > fac_len - 2) {
+ PDEBUG(DEBUG_GSM, "Component Tag in facility message greater than message length\n");
+ return;
+ }
+ comp_type = fac_ie[0];
+ comp_len = fac_ie[1];
+ comp_val = fac_ie + 2;
+ PDEBUG(DEBUG_GSM, "Component Tag type 0x%02x\n", comp_type);
+ /* tags inside component */
+ for (i = 0; i != comp_len;) {
+ if (comp_val[1 + i] > comp_len - i - 2) {
+ PDEBUG(DEBUG_GSM, "Tag inside Component TAG greater than Component length\n");
+ break;
+ }
+ PDEBUG(DEBUG_GSM, "Tag inside Component Tag (type 0x%02x)\n", comp_val[0 + i]);
+ if (comp_val[0 + i] == 0x02 && ! invoke) { /* Invoke ID Tag */
+ if (comp_val[1 + i] != 1) {
+ PDEBUG(DEBUG_GSM, "Invoke ID Tag has invalid length\n");
+ break;
+ }
+ invoke = 1;
+ invoke_id = comp_val[2 + i];
+ PDEBUG(DEBUG_GSM, "Invoke ID Tag inside Component TAG with ID=%d\n", invoke_id);
+ } else if (comp_val[0 + i] == 0x02 && !operation) { /* Operation Code Tag */
+ if (comp_val[1 + i] != 1) {
+ PDEBUG(DEBUG_GSM, "Operation Code Tag has invalid length\n");
+ break;
+ }
+ operation = 1;
+ operation_code = comp_val[2 + i];
+ PDEBUG(DEBUG_GSM, "Operation Code Tag inside Component TAG with Code=%d\n", operation_code);
+ } else
+ PDEBUG(DEBUG_GSM, "Unknown Tag (0x%02x) inside Component TAG, ignoring\n", comp_val[0 + i]);
+
+ i += comp_val[1 + i] + 2;
+ }
+
+ /* check component type */
+ switch (comp_type) {
+ case 0xa1: /* Invoke */
+ if (!invoke) {
+ PDEBUG(DEBUG_GSM, "error: Invoke without Invoke ID\n");
+ break;
+ }
+ if (!operation) {
+ PDEBUG(DEBUG_GSM, "error: Invoke without Operation Tag\n");
+ break;
+ }
+ switch(operation_code) {
+ case 124: /* buildMTPY */
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_3PTY);
+ message->param.threepty.begin = 1;
+ message->param.threepty.invoke = 1;
+ message->param.threepty.invoke_id = invoke_id;
+ message_put(message);
+ return;
+
+ case 121: /* splitMTPY */
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_3PTY);
+ message->param.threepty.end = 1;
+ message->param.threepty.invoke = 1;
+ message->param.threepty.invoke_id = invoke_id;
+ message_put(message);
+ return;
+
+ case 122: /* holdMTPY */
+#ifdef TRANSFER_HACK
+ facility_req(-1, 122, invoke_id); /* rejected by network */
+
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TRANSFER);
+ message->param.transfer.invoke = 1;
+ message->param.transfer.invoke_id = invoke_id;
+ message_put(message);
+#else
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_3PTY);
+ message->param.threepty.hold = 1;
+ message->param.threepty.invoke = 1;
+ message->param.threepty.invoke_id = invoke_id;
+ message_put(message);
+#endif
+ return;
+
+ case 123: /* retrieveMTPY */
+#ifdef TRANSFER_HACK
+ facility_req(-1, 122, invoke_id); /* rejected by network */
+
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TRANSFER);
+ message->param.transfer.invoke = 1;
+ message->param.transfer.invoke_id = invoke_id;
+ message_put(message);
+#else
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_3PTY);
+ message->param.threepty.retrieve = 1;
+ message->param.threepty.invoke = 1;
+ message->param.threepty.invoke_id = invoke_id;
+ message_put(message);
+#endif
+ return;
+
+ case 126: /* explicitCT */
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TRANSFER);
+ message->param.transfer.invoke = 1;
+ message->param.transfer.invoke_id = invoke_id;
+ message_put(message);
+ return;
+ default:
+ PDEBUG(DEBUG_GSM, "error: Unsupported Operation\n");
+ facility_req(-1, 122, invoke_id); /* rejected by network */
+ return;
+ }
+ break;
+ }
+}
+
+
+/* MESSAGE_3PTY */
+void Pgsm_bs::message_3pty(unsigned int epoint_id, int message_id, union parameter *param)
+{
+ if (param->threepty.result) {
+ if (param->threepty.begin)
+ facility_req(124, -1, param->threepty.invoke_id); /* buildMPTY */
+ if (param->threepty.end)
+ facility_req(121, -1, param->threepty.invoke_id); /* splitMPTY */
+ }
+ if (param->threepty.error) {
+ facility_req(-1, 122, param->threepty.invoke_id); /* rejected by network */
+ }
+}
+
+void Pgsm_bs::enc_ie_facility_ect(struct gsm_mncc *mncc, struct param_transfer *transfer)
+{
+ if (transfer->result) {
+ enc_ie_facility(mncc, 126, -1, transfer->invoke_id); /* explicitCT */
+ }
+ if (transfer->error) {
+ enc_ie_facility(mncc, -1, 122, transfer->invoke_id); /* rejected by network */
+ }
+}
+
+/* MESSAGE_TRANSFER */
+void Pgsm_bs::message_transfer(unsigned int epoint_id, int message_id, union parameter *param)
+{
+#ifdef TRANSFER_HACK
+ struct gsm_mncc *mncc;
+
+ /* sending facility */
+ gsm_trace_header(p_interface_name, this, MNCC_FACILITY_REQ, DIRECTION_OUT);
+ mncc = create_mncc(MNCC_FACILITY_REQ, p_g_callref);
+ enc_ie_facility_ect(mncc, ¶m->transfer);
+ gsm_trace_facility((unsigned char *)mncc->facility.info, mncc->facility.len);
+ end_trace();
+ send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
+#endif
+}
+
projects / lcr.git / commitdiff