Removed check for NPDU Priority on MS/TP outgoing matching messages since the stack currently doesn't support passing the NDPU Priority through, and every outgoing message is NORMAL. This was causing Reply-Postponed, which is not a good thing for high priority messages. Thank you, Ettore Colicchio!

bacnet-stack/ports/at91sam7s/dlmstp.c

@@ -334,9 +334,13 @@ static bool dlmstp_compare_data_expecting_reply(
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }

bacnet-stack/ports/bdk-atxx4-mstp/dlmstp.c

@@ -333,9 +333,13 @@ static bool dlmstp_compare_data_expecting_reply(
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }

bacnet-stack/ports/linux/dlmstp.c

@@ -482,6 +482,9 @@ static bool dlmstp_compare_data_expecting_reply(
 #endif
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
 #if PRINT_ENABLED
         fprintf(stderr,
@@ -489,6 +492,7 @@ static bool dlmstp_compare_data_expecting_reply(
 #endif
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
 #if PRINT_ENABLED
         fprintf(stderr,

bacnet-stack/ports/linux/dlmstp_linux.c

@@ -534,6 +534,9 @@ bool dlmstp_compare_data_expecting_reply(
 #endif
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
 #if PRINT_ENABLED
         fprintf(stderr,
@@ -541,6 +544,7 @@ bool dlmstp_compare_data_expecting_reply(
 #endif
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
 #if PRINT_ENABLED
         fprintf(stderr,

bacnet-stack/ports/pic18f6720/mstp.c

@@ -650,9 +650,13 @@ static bool mstp_compare_data_expecting_reply(
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }

bacnet-stack/ports/stm32f10x/dlmstp.c

@@ -351,9 +351,13 @@ static bool dlmstp_compare_data_expecting_reply(
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }

bacnet-stack/ports/win32/dlmstp-mm.c

@@ -413,9 +413,13 @@ bool dlmstp_compare_data_expecting_reply(
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }

bacnet-stack/ports/win32/dlmstp.c

@@ -401,9 +401,13 @@ static bool dlmstp_compare_data_expecting_reply(
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }

bacnet-stack/ports/xplained/dlmstp.c

@@ -329,9 +329,13 @@ static bool dlmstp_compare_data_expecting_reply(uint8_t * request_pdu,
     if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
         return false;
     }
+#if 0
+    /* the NDPU priority doesn't get passed through the stack, and
+       all outgoing messages have NORMAL priority */
     if (request.npdu_data.priority != reply.npdu_data.priority) {
         return false;
     }
+#endif
     if (!bacnet_address_same(&request.address, &reply.address)) {
         return false;
     }