show RemoteAddr in server trace

server.go

@@ -291,6 +291,7 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 		traceInfo.tr = trace.New("grpc.Recv."+methodFamily(stream.Method()), stream.Method())
 		defer traceInfo.tr.Finish()
 		traceInfo.firstLine.client = false
+		traceInfo.firstLine.remoteAddr = t.RemoteAddr()
 		traceInfo.tr.LazyLog(&traceInfo.firstLine, false)
 		ctx = trace.NewContext(ctx, traceInfo.tr)
 		defer func() {
@@ -397,6 +398,7 @@ func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transp
 	if ss.tracing {
 		ss.traceInfo.tr = trace.New("grpc.Recv."+methodFamily(stream.Method()), stream.Method())
 		ss.traceInfo.firstLine.client = false
+		ss.traceInfo.firstLine.remoteAddr = t.RemoteAddr()
 		ss.traceInfo.tr.LazyLog(&ss.traceInfo.firstLine, false)
 		ss.ctx = trace.NewContext(ss.ctx, ss.traceInfo.tr)
 		defer func() {

transport/http2_server.go

@@ -689,3 +689,7 @@ func (t *http2Server) closeStream(s *Stream) {
 	// other goroutines.
 	s.cancel()
 }
+
+func (t *http2Server) RemoteAddr() net.Addr {
+	return t.conn.RemoteAddr()
+}

transport/transport.go

@@ -390,6 +390,8 @@ type ServerTransport interface {
 	// should not be accessed any more. All the pending streams and their
 	// handlers will be terminated asynchronously.
 	Close() error
+	// RemoteAddr returns the remote network address.
+	RemoteAddr() net.Addr
 }
 
 // StreamErrorf creates an StreamError with the specified error code and description.