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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,219 @@ | ||
| package rpc | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "net" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| "golang.org/x/sync/errgroup" | ||
| "pgregory.net/rapid" | ||
| ) | ||
|
|
||
| type cryptoPipelineMachine struct { | ||
| r *cryptoReader | ||
| w *cryptoWriter | ||
| rb *bytes.Buffer | ||
| actual *bytes.Buffer | ||
| expected []byte | ||
| offset int | ||
| fatalf func(format string, args ...any) | ||
| } | ||
|
|
||
| func (c *cryptoPipelineMachine) Write(t *rapid.T) { | ||
| s := rapid.SliceOf(rapid.Byte()).Draw(t, "slice") | ||
| c.expected = append(c.expected, s...) | ||
| for len(s) != 0 { | ||
| n, err := c.rb.Write(s) | ||
| if err != nil { | ||
| c.fatalf("write failed: %v", err) | ||
| } | ||
| s = s[n:] | ||
| } | ||
| } | ||
|
|
||
| func (c *cryptoPipelineMachine) Discard(t *rapid.T) { | ||
| n := rapid.IntRange(0, c.rb.Len()).Draw(t, "n") | ||
| if err := c.r.discard(n); err != nil { | ||
| c.fatalf("discard failed: %v", err) | ||
| } | ||
| c.expected = append(c.expected[:c.offset], c.expected[c.offset+n:]...) | ||
| } | ||
|
|
||
| func (c *cryptoPipelineMachine) ReadDiscard(t *rapid.T) { | ||
| n := rapid.IntRange(0, c.rb.Len()).Draw(t, "n") | ||
| m, err := c.r.Read(make([]byte, n)) | ||
| if err != nil { | ||
| c.fatalf("Read failed: %v", err) | ||
| } | ||
| c.expected = append(c.expected[:c.offset], c.expected[c.offset+m:]...) | ||
| } | ||
|
|
||
| func (c *cryptoPipelineMachine) Copy(t *rapid.T) { | ||
| n := rapid.IntRange(0, c.rb.Len()).Draw(t, "n") | ||
| rwe := cryptoCopy(c.w, c.r, n, nil) | ||
| if rwe.Error() != nil { | ||
| c.fatalf("copy failed: %v, %v", rwe.WriteErr, rwe.ReadErr) | ||
| } | ||
| if err := c.w.Flush(); err != nil { | ||
| c.fatalf("flush failed: %v", err) | ||
| } | ||
| c.offset += n | ||
| } | ||
|
|
||
| func (c *cryptoPipelineMachine) Check(_ *rapid.T) { | ||
| if len(c.expected) < c.actual.Len() { | ||
| c.fatalf("expected %v bytes, actual %v bytes", len(c.expected), c.actual.Len()) | ||
| } | ||
| expected := c.expected[:c.actual.Len()] | ||
| actual := c.actual.Bytes() | ||
| if !bytes.Equal(expected, actual) { | ||
| c.fatalf("expected %q, actual %q", expected, actual) | ||
| } | ||
| } | ||
|
|
||
| func TestCryptoPipeline(t *testing.T) { | ||
| rapid.Check(t, func(t *rapid.T) { | ||
| rb := &bytes.Buffer{} | ||
| actual := &bytes.Buffer{} | ||
| c := &cryptoPipelineMachine{ | ||
| rb: rb, | ||
| actual: actual, | ||
| r: newCryptoReader(rb, rapid.IntRange(0, 1024).Draw(t, "read_buffer_size")), | ||
| w: newCryptoWriter(actual, rapid.IntRange(0, 1024).Draw(t, "write_buffer_size")), | ||
| fatalf: t.Fatalf, | ||
| } | ||
| t.Repeat(rapid.StateMachineActions(c)) | ||
| _ = cryptoCopy(c.w, c.r, c.rb.Len()+cap(c.r.buf), nil) | ||
| _ = c.w.Flush() | ||
| if !bytes.Equal(c.expected, c.actual.Bytes()) { | ||
| c.fatalf("expected %q, actual %q", c.expected, c.actual.Bytes()) | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| type forwardPacketMachine struct { | ||
| client *PacketConn | ||
| server *PacketConn | ||
| proxyClient *PacketConn | ||
| proxyServer *PacketConn | ||
| protocolVersion uint32 | ||
| } | ||
|
|
||
| func newForwardPacketsMachine(t *rapid.T) (res forwardPacketMachine) { | ||
| var ( | ||
| network = "tcp" | ||
| proxyAddr = "127.0.0.1:7000" | ||
| upstreamAddr = "127.0.0.1:7001" | ||
| startTime = uint32(time.Now().Unix()) | ||
| forceEncryption = rapid.Bool().Draw(t, "forceEncryption") | ||
| protocolVersion = func() uint32 { | ||
| if rapid.Bool().Draw(t, "protocolVersion") { | ||
| return LatestProtocolVersion | ||
| } else { | ||
| return DefaultProtocolVersion | ||
| } | ||
| }() | ||
| cryptoKey = rapid.StringN(1, 1024, 1024).Draw(t, "cryptoKey") | ||
| ) | ||
| var ( | ||
| listen = func(addr string) net.Listener { | ||
| res, err := Listen(network, addr, false) | ||
| require.NoError(t, err) | ||
| return res | ||
| } | ||
| accept = func(ln net.Listener) (*PacketConn, error) { | ||
| defer ln.Close() | ||
| conn, err := ln.Accept() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| res := NewPacketConn(conn, DefaultServerRequestBufSize, DefaultServerResponseBufSize) | ||
| _, _, err = res.HandshakeServer([]string{cryptoKey}, nil, forceEncryption, startTime, 0) | ||
| if err != nil { | ||
| res.Close() | ||
| return nil, err | ||
| } | ||
| return res, nil | ||
| } | ||
| connect = func(addr string) (*PacketConn, error) { | ||
| conn, err := net.Dial(network, addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| res := NewPacketConn(conn, DefaultServerRequestBufSize, DefaultServerResponseBufSize) | ||
| err = res.HandshakeClient(cryptoKey, nil, forceEncryption, startTime, 0, 0, protocolVersion) | ||
| if err != nil { | ||
| res.Close() | ||
| return nil, err | ||
| } | ||
| return res, nil | ||
| } | ||
| ) | ||
| var group errgroup.Group | ||
| upstream := listen(upstreamAddr) | ||
| group.Go(func() (err error) { | ||
| res.server, err = accept(upstream) | ||
| return err | ||
| }) | ||
| proxy := listen(proxyAddr) | ||
| group.Go(func() (err error) { | ||
| if res.proxyServer, err = accept(proxy); err == nil { | ||
| res.proxyClient, err = connect(upstreamAddr) | ||
| } | ||
| return err | ||
| }) | ||
| var err error | ||
| res.client, err = connect(proxyAddr) | ||
| require.NoError(t, err) | ||
| require.NoError(t, group.Wait()) | ||
| res.protocolVersion = protocolVersion | ||
| return res | ||
| } | ||
|
|
||
| func (m *forwardPacketMachine) close() { | ||
| m.client.Close() | ||
| m.proxyClient.Close() | ||
| m.server.Close() | ||
| m.proxyServer.Close() | ||
| } | ||
|
|
||
| func TestForwardPacket(t *testing.T) { | ||
| type message struct { | ||
| tip uint32 | ||
| body []byte | ||
| } | ||
| rapid.Check(t, func(t *rapid.T) { | ||
| m := newForwardPacketsMachine(t) | ||
| defer m.close() | ||
| minBodyLen := 1 | ||
| if m.protocolVersion == DefaultProtocolVersion { | ||
| minBodyLen = 4 | ||
| } | ||
| for i := 0; i < 512; i++ { | ||
| var group errgroup.Group | ||
| group.Go(func() error { | ||
| res := ForwardPacket(context.Background(), m.proxyClient, m.proxyServer) | ||
| return res.Error() | ||
| }) | ||
| sent := message{ | ||
| tip: rapid.Uint32().Draw(t, "tip"), | ||
| body: rapid.SliceOfN(rapid.Byte(), minBodyLen, 1024).Draw(t, "body"), | ||
| } | ||
| if m.protocolVersion == DefaultProtocolVersion { | ||
| sent.body = sent.body[:len(sent.body)-len(sent.body)%4] | ||
| } | ||
| err := m.client.WritePacket(sent.tip, sent.body, 0) | ||
| require.NoError(t, err) | ||
| m.client.Flush() | ||
| require.NoError(t, err) | ||
| require.NoError(t, group.Wait()) | ||
| var received message | ||
| received.tip, received.body, err = m.server.ReadPacket(nil, 0) | ||
| require.NoError(t, err) | ||
| require.Equal(t, sent, received) | ||
| } | ||
| }) | ||
| } |