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0773938d70
SUDP payload codec follows transport wireProtocol; same-protocol v1/v1 and v2/v2 keep raw join; only mixed proxy/visitor protocols use message-aware bridge; no new capability/selection field.
141 lines
4.1 KiB
Go
141 lines
4.1 KiB
Go
// Copyright 2026 The frp Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package proxy
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import (
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"bufio"
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"bytes"
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"encoding/binary"
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/fatedier/frp/pkg/msg"
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"github.com/fatedier/frp/pkg/proto/wire"
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)
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func TestSUDPBridgeTranscodesProxyV1ToVisitorV2(t *testing.T) {
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var in, out bytes.Buffer
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writeSUDPBridgeMsg(t, &in, wire.ProtocolV1, &msg.UDPPacket{Content: []byte("proxy-to-visitor")})
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var count int64
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err := bridgeSUDPProxyToVisitor(
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msg.NewReadWriter(&in, wire.ProtocolV1),
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msg.NewReadWriter(&out, wire.ProtocolV2),
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&count,
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nil,
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)
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require.NoError(t, err)
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require.Equal(t, int64(len("proxy-to-visitor")), count)
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frame, err := wire.NewConn(&out).ReadFrame()
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require.NoError(t, err)
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require.Equal(t, wire.FrameTypeMessage, frame.Type)
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require.GreaterOrEqual(t, len(frame.Payload), 2)
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require.Equal(t, msg.V2TypeUDPPacket, binary.BigEndian.Uint16(frame.Payload[:2]))
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var got msg.UDPPacket
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require.NoError(t, msg.DecodeV2MessageFrameInto(frame, &got))
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require.Equal(t, []byte("proxy-to-visitor"), got.Content)
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}
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func TestSUDPBridgeTranscodesVisitorV2ToProxyV1(t *testing.T) {
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var in, out bytes.Buffer
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writeSUDPBridgeMsg(t, &in, wire.ProtocolV2, &msg.UDPPacket{Content: []byte("visitor-to-proxy")})
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var count int64
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err := bridgeSUDPVisitorToProxy(
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msg.NewReadWriter(&in, wire.ProtocolV2),
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msg.NewReadWriter(&out, wire.ProtocolV1),
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&count,
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nil,
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)
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require.NoError(t, err)
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require.Equal(t, int64(len("visitor-to-proxy")), count)
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reader := bufio.NewReader(&out)
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typeByte, err := reader.ReadByte()
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require.NoError(t, err)
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require.Equal(t, msg.TypeUDPPacket, typeByte)
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require.NoError(t, reader.UnreadByte())
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var got msg.UDPPacket
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require.NoError(t, msg.ReadMsgInto(reader, &got))
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require.Equal(t, []byte("visitor-to-proxy"), got.Content)
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}
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func TestSUDPBridgeForwardsProxyPing(t *testing.T) {
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var in, out bytes.Buffer
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writeSUDPBridgeMsg(t, &in, wire.ProtocolV1, &msg.Ping{})
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var count int64
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err := bridgeSUDPProxyToVisitor(
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msg.NewReadWriter(&in, wire.ProtocolV1),
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msg.NewReadWriter(&out, wire.ProtocolV2),
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&count,
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nil,
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)
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require.NoError(t, err)
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require.Zero(t, count)
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rawMsg, err := msg.NewReadWriter(&out, wire.ProtocolV2).ReadMsg()
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require.NoError(t, err)
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require.IsType(t, &msg.Ping{}, rawMsg)
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}
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func TestSUDPBridgeDropsVisitorPing(t *testing.T) {
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var in, out bytes.Buffer
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writeSUDPBridgeMsg(t, &in, wire.ProtocolV2, &msg.Ping{})
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var count int64
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err := bridgeSUDPVisitorToProxy(
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msg.NewReadWriter(&in, wire.ProtocolV2),
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msg.NewReadWriter(&out, wire.ProtocolV1),
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&count,
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nil,
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)
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require.NoError(t, err)
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require.Zero(t, count)
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require.Empty(t, out.Bytes())
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}
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func TestSUDPBridgeRejectsUnknownVisitorMessage(t *testing.T) {
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var in, out bytes.Buffer
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writeSUDPBridgeMsg(t, &in, wire.ProtocolV2, &msg.Pong{})
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var count int64
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err := bridgeSUDPVisitorToProxy(
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msg.NewReadWriter(&in, wire.ProtocolV2),
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msg.NewReadWriter(&out, wire.ProtocolV1),
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&count,
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nil,
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)
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require.ErrorContains(t, err, "unexpected SUDP visitor message *msg.Pong")
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require.Zero(t, count)
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require.Empty(t, out.Bytes())
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}
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func TestSUDPBridgeDetectsMixedWireProtocol(t *testing.T) {
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require.False(t, isMixedWireProtocol("", wire.ProtocolV1))
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require.False(t, isMixedWireProtocol(wire.ProtocolV2, wire.ProtocolV2))
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require.True(t, isMixedWireProtocol("", wire.ProtocolV2))
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require.True(t, isMixedWireProtocol(wire.ProtocolV2, wire.ProtocolV1))
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}
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func writeSUDPBridgeMsg(t *testing.T, buf *bytes.Buffer, wireProtocol string, m msg.Message) {
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t.Helper()
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require.NoError(t, msg.NewReadWriter(buf, wireProtocol).WriteMsg(m))
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}
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