| 123456789101112131415161718192021222324252627282930313233343536373839 | package protocolimport (	"bytes"	"testing"	"v2ray.com/core/common/alloc"	v2net "v2ray.com/core/common/net"	"v2ray.com/core/testing/assert")func TestSocks4AuthenticationRequestRead(t *testing.T) {	assert := assert.On(t)	rawRequest := []byte{		0x04, // version		0x01, // command		0x00, 0x35,		0x72, 0x72, 0x72, 0x72,	}	_, request4, err := ReadAuthentication(bytes.NewReader(rawRequest))	assert.Error(err).Equals(Socks4Downgrade)	assert.Byte(request4.Version).Equals(0x04)	assert.Byte(request4.Command).Equals(0x01)	assert.Port(request4.Port).Equals(v2net.Port(53))	assert.Bytes(request4.IP[:]).Equals([]byte{0x72, 0x72, 0x72, 0x72})}func TestSocks4AuthenticationResponseToBytes(t *testing.T) {	assert := assert.On(t)	response := NewSocks4AuthenticationResponse(byte(0x10), 443, []byte{1, 2, 3, 4})	buffer := alloc.NewLocalBuffer(2048)	defer buffer.Release()	response.Write(buffer)	assert.Bytes(buffer.Bytes()).Equals([]byte{0x00, 0x10, 0x01, 0xBB, 0x01, 0x02, 0x03, 0x04})}
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