diff --git a/libc/kernel/uapi/linux/in6.h b/libc/kernel/uapi/linux/in6.h
new file mode 100644
index 0000000..0d00e2b
--- /dev/null
+++ b/libc/kernel/uapi/linux/in6.h
@@ -0,0 +1,189 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_IN6_H
+#define _UAPI_LINUX_IN6_H
+#include <linux/types.h>
+struct in6_addr {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ union {
+ __u8 u6_addr8[16];
+ __be16 u6_addr16[8];
+ __be32 u6_addr32[4];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ } in6_u;
+#define s6_addr in6_u.u6_addr8
+#define s6_addr16 in6_u.u6_addr16
+#define s6_addr32 in6_u.u6_addr32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+struct sockaddr_in6 {
+ unsigned short int sin6_family;
+ __be16 sin6_port;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __be32 sin6_flowinfo;
+ struct in6_addr sin6_addr;
+ __u32 sin6_scope_id;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ipv6_mreq {
+ struct in6_addr ipv6mr_multiaddr;
+ int ipv6mr_ifindex;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ipv6mr_acaddr ipv6mr_multiaddr
+struct in6_flowlabel_req {
+ struct in6_addr flr_dst;
+ __be32 flr_label;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u8 flr_action;
+ __u8 flr_share;
+ __u16 flr_flags;
+ __u16 flr_expires;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u16 flr_linger;
+ __u32 __flr_pad;
+};
+#define IPV6_FL_A_GET 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_FL_A_PUT 1
+#define IPV6_FL_A_RENEW 2
+#define IPV6_FL_F_CREATE 1
+#define IPV6_FL_F_EXCL 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_FL_S_NONE 0
+#define IPV6_FL_S_EXCL 1
+#define IPV6_FL_S_PROCESS 2
+#define IPV6_FL_S_USER 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_FL_S_ANY 255
+#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
+#define IPV6_FLOWINFO_PRIORITY 0x0ff00000
+#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PRIORITY_FILLER 0x0100
+#define IPV6_PRIORITY_UNATTENDED 0x0200
+#define IPV6_PRIORITY_RESERVED1 0x0300
+#define IPV6_PRIORITY_BULK 0x0400
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PRIORITY_RESERVED2 0x0500
+#define IPV6_PRIORITY_INTERACTIVE 0x0600
+#define IPV6_PRIORITY_CONTROL 0x0700
+#define IPV6_PRIORITY_8 0x0800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PRIORITY_9 0x0900
+#define IPV6_PRIORITY_10 0x0a00
+#define IPV6_PRIORITY_11 0x0b00
+#define IPV6_PRIORITY_12 0x0c00
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PRIORITY_13 0x0d00
+#define IPV6_PRIORITY_14 0x0e00
+#define IPV6_PRIORITY_15 0x0f00
+#define IPPROTO_HOPOPTS 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPPROTO_ROUTING 43
+#define IPPROTO_FRAGMENT 44
+#define IPPROTO_ICMPV6 58
+#define IPPROTO_NONE 59
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPPROTO_DSTOPTS 60
+#define IPPROTO_MH 135
+#define IPV6_TLV_PAD1 0
+#define IPV6_TLV_PADN 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_TLV_ROUTERALERT 5
+#define IPV6_TLV_JUMBO 194
+#define IPV6_TLV_HAO 201
+#define IPV6_ADDRFORM 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_2292PKTINFO 2
+#define IPV6_2292HOPOPTS 3
+#define IPV6_2292DSTOPTS 4
+#define IPV6_2292RTHDR 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_2292PKTOPTIONS 6
+#define IPV6_CHECKSUM 7
+#define IPV6_2292HOPLIMIT 8
+#define IPV6_NEXTHOP 9
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_AUTHHDR 10
+#define IPV6_FLOWINFO 11
+#define IPV6_UNICAST_HOPS 16
+#define IPV6_MULTICAST_IF 17
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_MULTICAST_HOPS 18
+#define IPV6_MULTICAST_LOOP 19
+#define IPV6_ADD_MEMBERSHIP 20
+#define IPV6_DROP_MEMBERSHIP 21
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_ROUTER_ALERT 22
+#define IPV6_MTU_DISCOVER 23
+#define IPV6_MTU 24
+#define IPV6_RECVERR 25
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_V6ONLY 26
+#define IPV6_JOIN_ANYCAST 27
+#define IPV6_LEAVE_ANYCAST 28
+#define IPV6_PMTUDISC_DONT 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PMTUDISC_WANT 1
+#define IPV6_PMTUDISC_DO 2
+#define IPV6_PMTUDISC_PROBE 3
+#define IPV6_FLOWLABEL_MGR 32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_FLOWINFO_SEND 33
+#define IPV6_IPSEC_POLICY 34
+#define IPV6_XFRM_POLICY 35
+#define IPV6_RECVPKTINFO 49
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PKTINFO 50
+#define IPV6_RECVHOPLIMIT 51
+#define IPV6_HOPLIMIT 52
+#define IPV6_RECVHOPOPTS 53
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_HOPOPTS 54
+#define IPV6_RTHDRDSTOPTS 55
+#define IPV6_RECVRTHDR 56
+#define IPV6_RTHDR 57
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_RECVDSTOPTS 58
+#define IPV6_DSTOPTS 59
+#define IPV6_RECVPATHMTU 60
+#define IPV6_PATHMTU 61
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_DONTFRAG 62
+#define IPV6_RECVTCLASS 66
+#define IPV6_TCLASS 67
+#define IPV6_ADDR_PREFERENCES 72
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PREFER_SRC_TMP 0x0001
+#define IPV6_PREFER_SRC_PUBLIC 0x0002
+#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
+#define IPV6_PREFER_SRC_COA 0x0004
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_PREFER_SRC_HOME 0x0400
+#define IPV6_PREFER_SRC_CGA 0x0008
+#define IPV6_PREFER_SRC_NONCGA 0x0800
+#define IPV6_MINHOPCOUNT 73
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IPV6_ORIGDSTADDR 74
+#define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
+#define IPV6_TRANSPARENT 75
+#define IPV6_UNICAST_IF 76
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif