for openziti/ziti#3437 adds edge client structured errors (#844)

* for openziti/ziti#3437 adds edge client structured errors

- adds a header specifically for structured errors
- used in ziti/router code

Author: andrewpmartinez

pb/edge_client_pb/edge_client.pb.go

@@ -85,6 +85,7 @@ enum HeaderId {
   XgressAddress = 1030;
   InspectRequestedValues = 1031;
   SupportsPostureChecks = 1032;
+  StructuredError = 1033;
 }
 
 enum Error {
@@ -100,6 +101,7 @@ enum Error {
   InvalidPrecedence = 9;
   InvalidCost = 10;
   EncryptionDataMissing = 11;
+  InvalidApiSessionType = 12;
 }
 
 enum PrecedenceValue {

pb/edge_client_pb/edge_client.proto

@@ -112,20 +112,22 @@ const (
 	XgressAddressHeader            = int32(edge_client_pb.HeaderId_XgressAddress)
 	InspectRequestValuesHeader     = int32(edge_client_pb.HeaderId_InspectRequestedValues)
 	SupportsPostureChecksHeader    = int32(edge_client_pb.HeaderId_SupportsPostureChecks)
+	StructuredError                = int32(edge_client_pb.HeaderId_StructuredError)
 )
 
 const (
-	ErrorCodeInternal                    = int32(edge_client_pb.Error_Internal)
-	ErrorCodeInvalidApiSession           = int32(edge_client_pb.Error_InvalidApiSession)
-	ErrorCodeInvalidSession              = int32(edge_client_pb.Error_InvalidSession)
-	ErrorCodeWrongSessionType            = int32(edge_client_pb.Error_WrongSessionType)
-	ErrorCodeInvalidEdgeRouterForSession = int32(edge_client_pb.Error_InvalidEdgeRouterForSession)
-	ErrorCodeInvalidService              = int32(edge_client_pb.Error_InvalidService)
-	ErrorCodeTunnelingNotEnabled         = int32(edge_client_pb.Error_TunnelingNotEnabled)
-	ErrorCodeInvalidTerminator           = int32(edge_client_pb.Error_InvalidTerminator)
-	ErrorCodeInvalidPrecedence           = int32(edge_client_pb.Error_InvalidPrecedence)
-	ErrorCodeInvalidCost                 = int32(edge_client_pb.Error_InvalidCost)
-	ErrorCodeEncryptionDataMissing       = int32(edge_client_pb.Error_EncryptionDataMissing)
+	ErrorCodeInternal                    = uint32(edge_client_pb.Error_Internal)
+	ErrorCodeInvalidApiSession           = uint32(edge_client_pb.Error_InvalidApiSession)
+	ErrorCodeInvalidSession              = uint32(edge_client_pb.Error_InvalidSession)
+	ErrorCodeWrongSessionType            = uint32(edge_client_pb.Error_WrongSessionType)
+	ErrorCodeInvalidEdgeRouterForSession = uint32(edge_client_pb.Error_InvalidEdgeRouterForSession)
+	ErrorCodeInvalidService              = uint32(edge_client_pb.Error_InvalidService)
+	ErrorCodeTunnelingNotEnabled         = uint32(edge_client_pb.Error_TunnelingNotEnabled)
+	ErrorCodeInvalidTerminator           = uint32(edge_client_pb.Error_InvalidTerminator)
+	ErrorCodeInvalidPrecedence           = uint32(edge_client_pb.Error_InvalidPrecedence)
+	ErrorCodeInvalidCost                 = uint32(edge_client_pb.Error_InvalidCost)
+	ErrorCodeEncryptionDataMissing       = uint32(edge_client_pb.Error_EncryptionDataMissing)
+	ErrorCodeInvalidApiSessionType       = uint32(edge_client_pb.Error_InvalidApiSessionType)
 )
 
 const (