--- ./include/linux/if_pppol2tp.h.build	2012-08-06 12:58:50.000000000 +0000
+++ ./include/linux/if_pppol2tp.h	2012-08-06 12:59:46.245305058 +0000
@@ -46,6 +46,31 @@
        __u32 d_tunnel, d_session;      /* For sending outgoing packets */
 };
 
+/* Structure used to connect() the socket to a particular tunnel UDP
+ *  * socket over IPv6.
+ *   */
+struct pppol2tpin6_addr {
+	__kernel_pid_t  pid;            /* pid that owns the fd.
+					 * 0 => current */
+	int	fd;			/* FD of UDP socket to use */
+
+	__u16 s_tunnel, s_session;	/* For matching incoming packets */
+	__u16 d_tunnel, d_session;	/* For sending outgoing packets */
+
+	struct sockaddr_in6 addr;	/* IP address and port to send to */
+};
+
+struct pppol2tpv3in6_addr {
+	__kernel_pid_t  pid;		/* pid that owns the fd.
+					 * 0 => current */
+	int	fd;			/* FD of UDP or IP socket to use */
+
+	__u32 s_tunnel, s_session;	/* For matching incoming packets */
+	__u32 d_tunnel, d_session;	/* For sending outgoing packets */
+
+	struct sockaddr_in6 addr;	/* IP address and port to send to */
+};
+
 /* Socket options:
  * DEBUG	- bitmask of debug message categories
  * SENDSEQ	- 0 => don't send packets with sequence numbers