Further drafting of rpc module.

Also: fix typo in model definitions.

rpc/structs.go

@@ -1,29 +1,76 @@
-package protocol
+package rpc
 
-type RequestId uint8
-type Request struct {
-	RequestType RequestType
-	RequestId 	[16]byte // UUID
+import "io"
+
+type RequestId [16]byte
+type RequestType uint8
+
+const (
+	RTProtocolVersionRequest RequestType = 1
+	RTFilesystemRequest                  = 16
+	RTInitialTransferRequest             = 17
+)
+
+type RequestHeader struct {
+	Type RequestType
+	Id   [16]byte // UUID
 }
 
 type FilesystemRequest struct {
-	Request
 	Roots []string
 }
 
 type InitialTransferRequest struct {
-	Request
 	Snapshot string // tank/my/db@ljlsdjflksdf
 }
+
 func (r InitialTransferRequest) Respond(snapshotReader io.Reader) {
 
 }
 
 type IncrementalTransferRequest struct {
-	Request
 	FromSnapshot string
-	ToSnapshot 	 string
+	ToSnapshot   string
 }
+
 func (r IncrementalTransferRequest) Respond(snapshotReader io.Reader) {
 
 }
+
+type ByteStreamRPCProtocolVersionRequest struct {
+	ClientVersion uint8
+}
+
+type ErrorId uint8
+
+const (
+	ENoError                 ErrorId = 0
+	EDecodeHeader                    = 1
+	EUnknownRequestType              = 2
+	EDecodeRequestBody               = 3
+	EProtocolVersionMismatch         = 4
+	EHandler                         = 5
+)
+
+type ResponseType uint8
+
+const (
+	ROK ResponseType = 0
+)
+
+type ResponseHeader struct {
+	RequestId    RequestId
+	ErrorId      ErrorId
+	Message      string
+	ResponseType ResponseType
+}
+
+func NewByteStreamRPCProtocolVersionRequest() ByteStreamRPCProtocolVersionRequest {
+	return ByteStreamRPCProtocolVersionRequest{
+		ClientVersion: ByteStreamRPCProtocolVersion,
+	}
+}
+
+func newUUID() [16]byte {
+	return [16]byte{}
+}