fix socks4

socks.go

@@ -261,6 +261,9 @@ func (c *socks4Connector) Connect(conn net.Conn, addr string) (net.Conn, error)
 	if err != nil {
 		return nil, err
 	}
+	if len(taddr.IP) == 0 {
+		taddr.IP = net.IPv4(0, 0, 0, 0)
+	}
 
 	req := gosocks4.NewRequest(gosocks4.CmdConnect,
 		&gosocks4.Addr{

vendor/github.com/ginuerzh/gosocks4/socks4.go

@@ -56,7 +56,7 @@ func (addr *Addr) Decode(b []byte) error {
 	addr.Port = binary.BigEndian.Uint16(b[0:2])
 	addr.Host = net.IP(b[2 : 2+net.IPv4len]).String()
 
-	if b[2]|b[3]|b[4] == 0 {
+	if b[2]|b[3]|b[4] == 0 && b[5] != 0 {
 		addr.Type = AddrDomain
 	}
 

vendor/vendor.json

@@ -81,10 +81,10 @@
 			"revisionTime": "2016-08-31T15:17:26Z"
 		},
 		{
-			"checksumSHA1": "aIhLeVAIrsjs63CwqmU3+GU8yT4=",
+			"checksumSHA1": "AqX1ZPaQtMCpfiTiA2zGmWadYl0=",
 			"path": "github.com/ginuerzh/gosocks4",
-			"revision": "fc196f9d34e35f19a813bff2f092a275131c23bc",
-			"revisionTime": "2017-02-09T14:09:51Z"
+			"revision": "c3a6700bad67bd29718fd19212b3dd934aea89b3",
+			"revisionTime": "2017-09-04T03:46:09Z"
 		},
 		{
 			"checksumSHA1": "4JEexBJToQeQm7fAo2PHVdCU3zM=",