[#367] session: Support `magic_number` field of `RequestMetaHeader`

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

session/convert.go

@@ -389,6 +389,7 @@ func (r *RequestMetaHeader) ToGRPCMessage() grpc.Message {
 		m.SetEpoch(r.epoch)
 		m.SetTtl(r.ttl)
 		m.SetOrigin(r.origin.ToGRPCMessage().(*session.RequestMetaHeader))
+		m.SetNetworkMagic(r.netMagic)
 	}
 
 	return m
@@ -465,6 +466,7 @@ func (r *RequestMetaHeader) FromGRPCMessage(m grpc.Message) error {
 
 	r.epoch = v.GetEpoch()
 	r.ttl = v.GetTtl()
+	r.netMagic = v.GetNetworkMagic()
 
 	return nil
 }

session/grpc/types.go

@@ -185,6 +185,22 @@ func (m *RequestMetaHeader) SetOrigin(v *RequestMetaHeader) {
 	}
 }
 
+// GetNetworkMagic returns NeoFS network magic.
+func (m *RequestMetaHeader) GetNetworkMagic() uint64 {
+	if m != nil {
+		return m.MagicNumber
+	}
+
+	return 0
+}
+
+// SetNetworkMagic sets NeoFS network magic.
+func (m *RequestMetaHeader) SetNetworkMagic(v uint64) {
+	if m != nil {
+		m.MagicNumber = v
+	}
+}
+
 // SetVersion sets server protocol version.
 func (m *ResponseMetaHeader) SetVersion(v *refs.Version) {
 	if m != nil {

session/marshal.go

@@ -41,6 +41,7 @@ const (
 	reqMetaHeaderSessionTokenField = 5
 	reqMetaHeaderBearerTokenField  = 6
 	reqMetaHeaderOriginField       = 7
+	reqMetaHeaderNetMagicField     = 8
 
 	reqVerifHeaderBodySignatureField   = 1
 	reqVerifHeaderMetaSignatureField   = 2
@@ -564,7 +565,14 @@ func (r *RequestMetaHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.NestedStructureMarshal(reqMetaHeaderOriginField, buf[offset:], r.origin)
+	n, err = proto.NestedStructureMarshal(reqMetaHeaderOriginField, buf[offset:], r.origin)
+	if err != nil {
+		return nil, err
+	}
+
+	offset += n
+
+	_, err = proto.UInt64Marshal(reqMetaHeaderNetMagicField, buf[offset:], r.netMagic)
 	if err != nil {
 		return nil, err
 	}
@@ -591,6 +599,7 @@ func (r *RequestMetaHeader) StableSize() (size int) {
 	size += proto.NestedStructureSize(reqMetaHeaderSessionTokenField, r.sessionToken)
 	size += proto.NestedStructureSize(reqMetaHeaderBearerTokenField, r.bearerToken)
 	size += proto.NestedStructureSize(reqMetaHeaderOriginField, r.origin)
+	size += proto.UInt64Size(reqMetaHeaderNetMagicField, r.netMagic)
 
 	return size
 }

session/test/generate.go

@@ -130,6 +130,7 @@ func generateRequestMetaHeader(empty, withOrigin bool) *session.RequestMetaHeade
 	if !empty {
 		m.SetEpoch(13)
 		m.SetTTL(100)
+		m.SetNetworkMagic(1337)
 	}
 
 	m.SetXHeaders(GenerateXHeaders(empty))

session/types.go

@@ -88,6 +88,8 @@ type RequestMetaHeader struct {
 	bearerToken *acl.BearerToken
 
 	origin *RequestMetaHeader
+
+	netMagic uint64
 }
 
 type ResponseVerificationHeader struct {
@@ -443,6 +445,22 @@ func (r *RequestMetaHeader) SetOrigin(v *RequestMetaHeader) {
 	}
 }
 
+// GetNetworkMagic returns NeoFS network magic.
+func (r *RequestMetaHeader) GetNetworkMagic() uint64 {
+	if r != nil {
+		return r.netMagic
+	}
+
+	return 0
+}
+
+// SetNetworkMagic sets NeoFS network magic.
+func (r *RequestMetaHeader) SetNetworkMagic(v uint64) {
+	if r != nil {
+		r.netMagic = v
+	}
+}
+
 func (l *TokenLifetime) GetExp() uint64 {
 	if l != nil {
 		return l.exp