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This commit is contained in:
Manfred Touron
2017-05-18 18:54:23 +02:00
parent dc386661ca
commit 5448f25fd6
645 changed files with 55908 additions and 33297 deletions
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57
vendor/golang.org/x/net/proxy/socks5.go generated vendored
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@@ -72,28 +72,24 @@ func (s *socks5) Dial(network, addr string) (net.Conn, error) {
if err != nil {
return nil, err
}
if err := s.connect(conn, addr); err != nil {
conn.Close()
return nil, err
}
return conn, nil
}
closeConn := &conn
defer func() {
if closeConn != nil {
(*closeConn).Close()
}
}()
// connect takes an existing connection to a socks5 proxy server,
// and commands the server to extend that connection to target,
// which must be a canonical address with a host and port.
func (s *socks5) connect(conn net.Conn, target string) error {
host, portStr, err := net.SplitHostPort(target)
host, portStr, err := net.SplitHostPort(addr)
if err != nil {
return err
return nil, err
}
port, err := strconv.Atoi(portStr)
if err != nil {
return errors.New("proxy: failed to parse port number: " + portStr)
return nil, errors.New("proxy: failed to parse port number: " + portStr)
}
if port < 1 || port > 0xffff {
return errors.New("proxy: port number out of range: " + portStr)
return nil, errors.New("proxy: port number out of range: " + portStr)
}
// the size here is just an estimate
@@ -107,17 +103,17 @@ func (s *socks5) connect(conn net.Conn, target string) error {
}
if _, err := conn.Write(buf); err != nil {
return errors.New("proxy: failed to write greeting to SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to write greeting to SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if _, err := io.ReadFull(conn, buf[:2]); err != nil {
return errors.New("proxy: failed to read greeting from SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to read greeting from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if buf[0] != 5 {
return errors.New("proxy: SOCKS5 proxy at " + s.addr + " has unexpected version " + strconv.Itoa(int(buf[0])))
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " has unexpected version " + strconv.Itoa(int(buf[0])))
}
if buf[1] == 0xff {
return errors.New("proxy: SOCKS5 proxy at " + s.addr + " requires authentication")
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " requires authentication")
}
if buf[1] == socks5AuthPassword {
@@ -129,15 +125,15 @@ func (s *socks5) connect(conn net.Conn, target string) error {
buf = append(buf, s.password...)
if _, err := conn.Write(buf); err != nil {
return errors.New("proxy: failed to write authentication request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to write authentication request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if _, err := io.ReadFull(conn, buf[:2]); err != nil {
return errors.New("proxy: failed to read authentication reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to read authentication reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if buf[1] != 0 {
return errors.New("proxy: SOCKS5 proxy at " + s.addr + " rejected username/password")
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " rejected username/password")
}
}
@@ -154,7 +150,7 @@ func (s *socks5) connect(conn net.Conn, target string) error {
buf = append(buf, ip...)
} else {
if len(host) > 255 {
return errors.New("proxy: destination hostname too long: " + host)
return nil, errors.New("proxy: destination hostname too long: " + host)
}
buf = append(buf, socks5Domain)
buf = append(buf, byte(len(host)))
@@ -163,11 +159,11 @@ func (s *socks5) connect(conn net.Conn, target string) error {
buf = append(buf, byte(port>>8), byte(port))
if _, err := conn.Write(buf); err != nil {
return errors.New("proxy: failed to write connect request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to write connect request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if _, err := io.ReadFull(conn, buf[:4]); err != nil {
return errors.New("proxy: failed to read connect reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to read connect reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
failure := "unknown error"
@@ -176,7 +172,7 @@ func (s *socks5) connect(conn net.Conn, target string) error {
}
if len(failure) > 0 {
return errors.New("proxy: SOCKS5 proxy at " + s.addr + " failed to connect: " + failure)
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " failed to connect: " + failure)
}
bytesToDiscard := 0
@@ -188,11 +184,11 @@ func (s *socks5) connect(conn net.Conn, target string) error {
case socks5Domain:
_, err := io.ReadFull(conn, buf[:1])
if err != nil {
return errors.New("proxy: failed to read domain length from SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to read domain length from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
bytesToDiscard = int(buf[0])
default:
return errors.New("proxy: got unknown address type " + strconv.Itoa(int(buf[3])) + " from SOCKS5 proxy at " + s.addr)
return nil, errors.New("proxy: got unknown address type " + strconv.Itoa(int(buf[3])) + " from SOCKS5 proxy at " + s.addr)
}
if cap(buf) < bytesToDiscard {
@@ -201,13 +197,14 @@ func (s *socks5) connect(conn net.Conn, target string) error {
buf = buf[:bytesToDiscard]
}
if _, err := io.ReadFull(conn, buf); err != nil {
return errors.New("proxy: failed to read address from SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to read address from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
// Also need to discard the port number
if _, err := io.ReadFull(conn, buf[:2]); err != nil {
return errors.New("proxy: failed to read port from SOCKS5 proxy at " + s.addr + ": " + err.Error())
return nil, errors.New("proxy: failed to read port from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
return nil
closeConn = nil
return conn, nil
}