diff --git a/libc/kernel/uapi/linux/l2tp.h b/libc/kernel/uapi/linux/l2tp.h
new file mode 100644
index 0000000..818cda4
--- /dev/null
+++ b/libc/kernel/uapi/linux/l2tp.h
@@ -0,0 +1,159 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_LINUX_L2TP_H_
+#define _UAPI_LINUX_L2TP_H_
+#include <linux/types.h>
+#include <linux/socket.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#include <netinet/in.h>
+#define IPPROTO_L2TP 115
+#define __SOCK_SIZE__ 16
+struct sockaddr_l2tpip {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __kernel_sa_family_t l2tp_family;
+ __be16 l2tp_unused;
+ struct in_addr l2tp_addr;
+ __u32 l2tp_conn_id;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned char __pad[sizeof(struct sockaddr) -
+ sizeof(__kernel_sa_family_t) -
+ sizeof(__be16) - sizeof(struct in_addr) -
+ sizeof(__u32)];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+struct sockaddr_l2tpip6 {
+ __kernel_sa_family_t l2tp_family;
+ __be16 l2tp_unused;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __be32 l2tp_flowinfo;
+ struct in6_addr l2tp_addr;
+ __u32 l2tp_scope_id;
+ __u32 l2tp_conn_id;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+enum {
+ L2TP_CMD_NOOP,
+ L2TP_CMD_TUNNEL_CREATE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_CMD_TUNNEL_DELETE,
+ L2TP_CMD_TUNNEL_MODIFY,
+ L2TP_CMD_TUNNEL_GET,
+ L2TP_CMD_SESSION_CREATE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_CMD_SESSION_DELETE,
+ L2TP_CMD_SESSION_MODIFY,
+ L2TP_CMD_SESSION_GET,
+ __L2TP_CMD_MAX,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1)
+enum {
+ L2TP_ATTR_NONE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_PW_TYPE,
+ L2TP_ATTR_ENCAP_TYPE,
+ L2TP_ATTR_OFFSET,
+ L2TP_ATTR_DATA_SEQ,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_L2SPEC_TYPE,
+ L2TP_ATTR_L2SPEC_LEN,
+ L2TP_ATTR_PROTO_VERSION,
+ L2TP_ATTR_IFNAME,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_CONN_ID,
+ L2TP_ATTR_PEER_CONN_ID,
+ L2TP_ATTR_SESSION_ID,
+ L2TP_ATTR_PEER_SESSION_ID,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_UDP_CSUM,
+ L2TP_ATTR_VLAN_ID,
+ L2TP_ATTR_COOKIE,
+ L2TP_ATTR_PEER_COOKIE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_DEBUG,
+ L2TP_ATTR_RECV_SEQ,
+ L2TP_ATTR_SEND_SEQ,
+ L2TP_ATTR_LNS_MODE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_USING_IPSEC,
+ L2TP_ATTR_RECV_TIMEOUT,
+ L2TP_ATTR_FD,
+ L2TP_ATTR_IP_SADDR,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_IP_DADDR,
+ L2TP_ATTR_UDP_SPORT,
+ L2TP_ATTR_UDP_DPORT,
+ L2TP_ATTR_MTU,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_MRU,
+ L2TP_ATTR_STATS,
+ L2TP_ATTR_IP6_SADDR,
+ L2TP_ATTR_IP6_DADDR,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __L2TP_ATTR_MAX,
+};
+#define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1)
+enum {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_STATS_NONE,
+ L2TP_ATTR_TX_PACKETS,
+ L2TP_ATTR_TX_BYTES,
+ L2TP_ATTR_TX_ERRORS,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_RX_PACKETS,
+ L2TP_ATTR_RX_BYTES,
+ L2TP_ATTR_RX_SEQ_DISCARDS,
+ L2TP_ATTR_RX_OOS_PACKETS,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_ATTR_RX_ERRORS,
+ __L2TP_ATTR_STATS_MAX,
+};
+#define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+enum l2tp_pwtype {
+ L2TP_PWTYPE_NONE = 0x0000,
+ L2TP_PWTYPE_ETH_VLAN = 0x0004,
+ L2TP_PWTYPE_ETH = 0x0005,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_PWTYPE_PPP = 0x0007,
+ L2TP_PWTYPE_PPP_AC = 0x0008,
+ L2TP_PWTYPE_IP = 0x000b,
+ __L2TP_PWTYPE_MAX
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+enum l2tp_l2spec_type {
+ L2TP_L2SPECTYPE_NONE,
+ L2TP_L2SPECTYPE_DEFAULT,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+enum l2tp_encap_type {
+ L2TP_ENCAPTYPE_UDP,
+ L2TP_ENCAPTYPE_IP,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+enum l2tp_seqmode {
+ L2TP_SEQ_NONE = 0,
+ L2TP_SEQ_IP = 1,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ L2TP_SEQ_ALL = 2,
+};
+#define L2TP_GENL_NAME "l2tp"
+#define L2TP_GENL_VERSION 0x1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif