Added checks for DeviceCommunicationControl that were in src/apdu.c but are missing from this port. Thanks, Vu!

bacnet-stack/ports/pic18f6720/apdu.c

@@ -102,6 +102,61 @@ uint16_t apdu_decode_confirmed_service_request(
     return len;
 }
 
+/* When network communications are completely disabled,
+   only DeviceCommunicationControl and ReinitializeDevice APDUs
+   shall be processed and no messages shall be initiated.
+   When the initiation of communications is disabled,
+   all APDUs shall be processed and responses returned as
+   required... */
+static bool apdu_confirmed_dcc_disabled(
+    uint8_t service_choice)
+{
+    bool status = false;
+
+    if (dcc_communication_disabled()) {
+        switch (service_choice) {
+            case SERVICE_CONFIRMED_DEVICE_COMMUNICATION_CONTROL:
+            case SERVICE_CONFIRMED_REINITIALIZE_DEVICE:
+                break;
+            default:
+                status = true;
+                break;
+        }
+    }
+
+    return status;
+}
+
+/* When network communications are completely disabled,
+   only DeviceCommunicationControl and ReinitializeDevice APDUs
+   shall be processed and no messages shall be initiated. */
+/* If the request is valid and the 'Enable/Disable' parameter is
+   DISABLE_INITIATION, the responding BACnet-user shall
+   discontinue the initiation of messages except for I-Am
+   requests issued in accordance with the Who-Is service procedure.*/
+static bool apdu_unconfirmed_dcc_disabled(
+    uint8_t service_choice)
+{
+    bool status = false;
+
+    if (dcc_communication_disabled()) {
+        /* there are no Unconfirmed messages that
+           can be processed in this state */
+        status = true;
+    } else if (dcc_communication_initiation_disabled()) {
+        /* WhoIs will be processed and I-Am initiated as response. */
+        switch (service_choice) {
+            case SERVICE_UNCONFIRMED_WHO_IS:
+                break;
+            default:
+                status = true;
+                break;
+        }
+    }
+
+    return status;
+}
+
 void apdu_handler(
     BACNET_ADDRESS * src,
     uint8_t * apdu,     /* APDU data */
@@ -120,6 +175,12 @@ void apdu_handler(
                 len = apdu_decode_confirmed_service_request(&apdu[0],   /* APDU data */
                     apdu_len, &service_data, &service_choice, &service_request,
                     &service_request_len);
+                if (apdu_confirmed_dcc_disabled(service_choice)) {
+                    /* When network communications are completely disabled,
+                       only DeviceCommunicationControl and ReinitializeDevice APDUs
+                       shall be processed and no messages shall be initiated. */
+                    break;
+                }
                 if (service_choice == SERVICE_CONFIRMED_READ_PROPERTY) {
                     handler_read_property(service_request, service_request_len,
                         src, &service_data);
@@ -143,6 +204,14 @@ void apdu_handler(
                 service_choice = apdu[1];
                 service_request = &apdu[2];
                 service_request_len = apdu_len - 2;
+                if (apdu_unconfirmed_dcc_disabled(service_choice)) {
+                    /* When network communications are disabled,
+                       only DeviceCommunicationControl and ReinitializeDevice APDUs
+                       shall be processed and no messages shall be initiated.
+                       If communications have been initiation disabled, then
+                       WhoIs may be processed. */
+                    break;
+                }
                 if (service_choice == SERVICE_UNCONFIRMED_WHO_IS) {
                     handler_who_is(service_request, service_request_len, src);
                 }