make route errors a more general 'message delivery failure' reason

in support of https://github.com/meshtastic/Meshtastic-device/issues/677

proto

@@ -1 +1 @@
-Subproject commit c9ad10d7e2f7f465dc477e98d6ec9d3b7059336c
+Subproject commit 1813b370ab5336fc3ba453fa92206f4941eda96b

src/mesh/DSRRouter.cpp

@@ -105,7 +105,7 @@ void DSRRouter::sniffReceived(const MeshPacket *p)
         // packets until ack arrives)
         // FIXME, if we don't get a route reply at all (or a route error), timeout and generate a routeerror TIMEOUT on our own...
         break;
-    case SubPacket_route_error_tag:
+    case SubPacket_error_reason_tag:
         removeRoute(p->decoded.dest);
 
         // FIXME: if any pending packets were waiting on this route, delete them
@@ -131,7 +131,7 @@ void DSRRouter::sniffReceived(const MeshPacket *p)
                 assert(p->decoded.source); // I think this is guaranteed by now
 
                 // FIXME - what if the current packet _is_ a route error packet?
-                sendRouteError(p, RouteError_NO_ROUTE);
+                sendRouteError(p, ErrorReason_NO_ROUTE);
             }
 
             // FIXME, stop local processing of this packet
@@ -145,7 +145,7 @@ void DSRRouter::sniffReceived(const MeshPacket *p)
             if (pending && pending->packet->decoded.source) { // if source not set, this was not a multihop packet, just ignore
                 removeRoute(pending->packet->decoded.dest);   // We no longer have a route to the specified node
 
-                sendRouteError(p, RouteError_GOT_NAK);
+                sendRouteError(p, ErrorReason_GOT_NAK);
             }
         }
     }
@@ -230,7 +230,7 @@ void DSRRouter::sendNextHop(NodeNum n, const MeshPacket *p)
 /**
  * Send a route error packet towards whoever originally sent this message
  */
-void DSRRouter::sendRouteError(const MeshPacket *p, RouteError err)
+void DSRRouter::sendRouteError(const MeshPacket *p, ErrorReason err)
 {
     DEBUG_MSG("FIXME not implemented sendRouteError\n");
 }

src/mesh/DSRRouter.h

@@ -70,7 +70,7 @@ class DSRRouter : public ReliableRouter
     /**
      * Send a route error packet towards whoever originally sent this message
      */
-    void sendRouteError(const MeshPacket *p, RouteError err);
+    void sendRouteError(const MeshPacket *p, ErrorReason err);
 
     /** make a copy of p, start discovery, but only if we don't
      *  already a discovery in progress for that node number.  Caller has already scheduled this message for retransmission

src/mesh/generated/mesh.pb.h

@@ -11,12 +11,13 @@
 #endif
 
 /* Enum definitions */
-typedef enum _RouteError {
-    RouteError_NONE = 0,
-    RouteError_NO_ROUTE = 1,
-    RouteError_GOT_NAK = 2,
-    RouteError_TIMEOUT = 3
-} RouteError;
+typedef enum _ErrorReason {
+    ErrorReason_NONE = 0,
+    ErrorReason_NO_ROUTE = 1,
+    ErrorReason_GOT_NAK = 2,
+    ErrorReason_TIMEOUT = 3,
+    ErrorReason_NO_INTERFACE = 4
+} ErrorReason;
 
 typedef enum _Constants {
     Constants_Unused = 0,
@@ -230,7 +231,7 @@ typedef struct _SubPacket {
         User user;
         RouteDiscovery route_request;
         RouteDiscovery route_reply;
-        RouteError route_error;
+        ErrorReason error_reason;
     };
     uint32_t original_id;
     bool want_response;
@@ -288,9 +289,9 @@ typedef struct _ToRadio {
 
 
 /* Helper constants for enums */
-#define _RouteError_MIN RouteError_NONE
-#define _RouteError_MAX RouteError_TIMEOUT
-#define _RouteError_ARRAYSIZE ((RouteError)(RouteError_TIMEOUT+1))
+#define _ErrorReason_MIN ErrorReason_NONE
+#define _ErrorReason_MAX ErrorReason_NO_INTERFACE
+#define _ErrorReason_ARRAYSIZE ((ErrorReason)(ErrorReason_NO_INTERFACE+1))
 
 #define _Constants_MIN Constants_Unused
 #define _Constants_MAX Constants_DATA_PAYLOAD_LEN
@@ -450,7 +451,7 @@ extern "C" {
 #define SubPacket_user_tag                       4
 #define SubPacket_route_request_tag              6
 #define SubPacket_route_reply_tag                7
-#define SubPacket_route_error_tag                13
+#define SubPacket_error_reason_tag               13
 #define SubPacket_original_id_tag                2
 #define SubPacket_want_response_tag              5
 #define SubPacket_dest_tag                       9
@@ -517,7 +518,7 @@ X(a, STATIC,   ONEOF,    MESSAGE,  (payload,data,data),   3) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,user,user),   4) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,route_request,route_request),   6) \
 X(a, STATIC,   ONEOF,    MESSAGE,  (payload,route_reply,route_reply),   7) \
-X(a, STATIC,   ONEOF,    UENUM,    (payload,route_error,route_error),  13) \
+X(a, STATIC,   ONEOF,    UENUM,    (payload,error_reason,error_reason),  13) \
 X(a, STATIC,   SINGULAR, UINT32,   original_id,       2) \
 X(a, STATIC,   SINGULAR, BOOL,     want_response,     5) \
 X(a, STATIC,   SINGULAR, UINT32,   dest,              9) \

src/mesh/generated/portnums.pb.h

@@ -19,7 +19,7 @@ typedef enum _PortNum {
     PortNum_REPLY_APP = 32,
     PortNum_IP_TUNNEL_APP = 33,
     PortNum_SERIAL_APP = 64,
-    PortNum_STORE_REQUEST_APP = 65,
+    PortNum_STORE_FORWARD_APP = 65,
     PortNum_PRIVATE_APP = 256,
     PortNum_ATAK_FORWARDER = 257
 } PortNum;