diff --git a/libc/kernel/uapi/linux/ipv6.h b/libc/kernel/uapi/linux/ipv6.h
new file mode 100644
index 0000000..e933d83
--- /dev/null
+++ b/libc/kernel/uapi/linux/ipv6.h
@@ -0,0 +1,146 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_IPV6_H
+#define _UAPI_IPV6_H
+#include <linux/types.h>
+#include <linux/in6.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#include <asm/byteorder.h>
+#define IPV6_MIN_MTU 1280
+struct in6_pktinfo {
+ struct in6_addr ipi6_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int ipi6_ifindex;
+};
+struct ip6_mtuinfo {
+ struct sockaddr_in6 ip6m_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 ip6m_mtu;
+};
+struct in6_ifreq {
+ struct in6_addr ifr6_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 ifr6_prefixlen;
+ int ifr6_ifindex;
+};
+#define IPV6_SRCRT_STRICT 0x01
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_SRCRT_TYPE_0 0
+#define IPV6_SRCRT_TYPE_2 2
+struct ipv6_rt_hdr {
+ __u8 nexthdr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u8 hdrlen;
+ __u8 type;
+ __u8 segments_left;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ipv6_opt_hdr {
+ __u8 nexthdr;
+ __u8 hdrlen;
+} __attribute__((packed));
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ipv6_destopt_hdr ipv6_opt_hdr
+#define ipv6_hopopt_hdr ipv6_opt_hdr
+#define IPV6_OPT_ROUTERALERT_MLD 0x0000
+struct rt0_hdr {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct ipv6_rt_hdr rt_hdr;
+ __u32 reserved;
+ struct in6_addr addr[0];
+#define rt0_type rt_hdr.type
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+struct rt2_hdr {
+ struct ipv6_rt_hdr rt_hdr;
+ __u32 reserved;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct in6_addr addr;
+#define rt2_type rt_hdr.type
+};
+struct ipv6_destopt_hao {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u8 type;
+ __u8 length;
+ struct in6_addr addr;
+} __attribute__((packed));
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ipv6hdr {
+#ifdef __LITTLE_ENDIAN_BITFIELD
+ __u8 priority:4,
+ version:4;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ __u8 version:4,
+ priority:4;
+#else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __u8 flow_lbl[3];
+ __be16 payload_len;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u8 nexthdr;
+ __u8 hop_limit;
+ struct in6_addr saddr;
+ struct in6_addr daddr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+enum {
+ DEVCONF_FORWARDING = 0,
+ DEVCONF_HOPLIMIT,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_MTU6,
+ DEVCONF_ACCEPT_RA,
+ DEVCONF_ACCEPT_REDIRECTS,
+ DEVCONF_AUTOCONF,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_DAD_TRANSMITS,
+ DEVCONF_RTR_SOLICITS,
+ DEVCONF_RTR_SOLICIT_INTERVAL,
+ DEVCONF_RTR_SOLICIT_DELAY,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_USE_TEMPADDR,
+ DEVCONF_TEMP_VALID_LFT,
+ DEVCONF_TEMP_PREFERED_LFT,
+ DEVCONF_REGEN_MAX_RETRY,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_MAX_DESYNC_FACTOR,
+ DEVCONF_MAX_ADDRESSES,
+ DEVCONF_FORCE_MLD_VERSION,
+ DEVCONF_ACCEPT_RA_DEFRTR,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_ACCEPT_RA_PINFO,
+ DEVCONF_ACCEPT_RA_RTR_PREF,
+ DEVCONF_RTR_PROBE_INTERVAL,
+ DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_PROXY_NDP,
+ DEVCONF_OPTIMISTIC_DAD,
+ DEVCONF_ACCEPT_SOURCE_ROUTE,
+ DEVCONF_MC_FORWARDING,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_DISABLE_IPV6,
+ DEVCONF_ACCEPT_DAD,
+ DEVCONF_FORCE_TLLAO,
+ DEVCONF_NDISC_NOTIFY,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ DEVCONF_MAX
+};
+#endif