1 files changed, 82 insertions, 15 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go
index 95f7a159a..bbe1abbce 100644
--- a/vendor/golang.org/x/sys/unix/syscall_linux.go
+++ b/vendor/golang.org/x/sys/unix/syscall_linux.go
@@ -839,6 +839,40 @@ func (sa *SockaddrTIPC) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrTIPC, nil
 }
 
+// SockaddrL2TPIP implements the Sockaddr interface for IPPROTO_L2TP/AF_INET sockets.
+type SockaddrL2TPIP struct {
+	Addr   [4]byte
+	ConnId uint32
+	raw    RawSockaddrL2TPIP
+}
+
+func (sa *SockaddrL2TPIP) sockaddr() (unsafe.Pointer, _Socklen, error) {
+	sa.raw.Family = AF_INET
+	sa.raw.Conn_id = sa.ConnId
+	for i := 0; i < len(sa.Addr); i++ {
+		sa.raw.Addr[i] = sa.Addr[i]
+	}
+	return unsafe.Pointer(&sa.raw), SizeofSockaddrL2TPIP, nil
+}
+
+// SockaddrL2TPIP6 implements the Sockaddr interface for IPPROTO_L2TP/AF_INET6 sockets.
+type SockaddrL2TPIP6 struct {
+	Addr   [16]byte
+	ZoneId uint32
+	ConnId uint32
+	raw    RawSockaddrL2TPIP6
+}
+
+func (sa *SockaddrL2TPIP6) sockaddr() (unsafe.Pointer, _Socklen, error) {
+	sa.raw.Family = AF_INET6
+	sa.raw.Conn_id = sa.ConnId
+	sa.raw.Scope_id = sa.ZoneId
+	for i := 0; i < len(sa.Addr); i++ {
+		sa.raw.Addr[i] = sa.Addr[i]
+	}
+	return unsafe.Pointer(&sa.raw), SizeofSockaddrL2TPIP6, nil
+}
+
 func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 	switch rsa.Addr.Family {
 	case AF_NETLINK:
@@ -889,25 +923,58 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 		return sa, nil
 
 	case AF_INET:
-		pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
-		sa := new(SockaddrInet4)
-		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
-		sa.Port = int(p[0])<<8 + int(p[1])
-		for i := 0; i < len(sa.Addr); i++ {
-			sa.Addr[i] = pp.Addr[i]
+		proto, err := GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL)
+		if err != nil {
+			return nil, err
+		}
+
+		switch proto {
+		case IPPROTO_L2TP:
+			pp := (*RawSockaddrL2TPIP)(unsafe.Pointer(rsa))
+			sa := new(SockaddrL2TPIP)
+			sa.ConnId = pp.Conn_id
+			for i := 0; i < len(sa.Addr); i++ {
+				sa.Addr[i] = pp.Addr[i]
+			}
+			return sa, nil
+		default:
+			pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
+			sa := new(SockaddrInet4)
+			p := (*[2]byte)(unsafe.Pointer(&pp.Port))
+			sa.Port = int(p[0])<<8 + int(p[1])
+			for i := 0; i < len(sa.Addr); i++ {
+				sa.Addr[i] = pp.Addr[i]
+			}
+			return sa, nil
 		}
-		return sa, nil
 
 	case AF_INET6:
-		pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
-		sa := new(SockaddrInet6)
-		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
-		sa.Port = int(p[0])<<8 + int(p[1])
-		sa.ZoneId = pp.Scope_id
-		for i := 0; i < len(sa.Addr); i++ {
-			sa.Addr[i] = pp.Addr[i]
+		proto, err := GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL)
+		if err != nil {
+			return nil, err
+		}
+
+		switch proto {
+		case IPPROTO_L2TP:
+			pp := (*RawSockaddrL2TPIP6)(unsafe.Pointer(rsa))
+			sa := new(SockaddrL2TPIP6)
+			sa.ConnId = pp.Conn_id
+			sa.ZoneId = pp.Scope_id
+			for i := 0; i < len(sa.Addr); i++ {
+				sa.Addr[i] = pp.Addr[i]
+			}
+			return sa, nil
+		default:
+			pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
+			sa := new(SockaddrInet6)
+			p := (*[2]byte)(unsafe.Pointer(&pp.Port))
+			sa.Port = int(p[0])<<8 + int(p[1])
+			sa.ZoneId = pp.Scope_id
+			for i := 0; i < len(sa.Addr); i++ {
+				sa.Addr[i] = pp.Addr[i]
+			}
+			return sa, nil
 		}
-		return sa, nil
 
 	case AF_VSOCK:
 		pp := (*RawSockaddrVM)(unsafe.Pointer(rsa))