diff --git a/libc/kernel/uapi/linux/if.h b/libc/kernel/uapi/linux/if.h
new file mode 100644
index 0000000..2b7133f
--- /dev/null
+++ b/libc/kernel/uapi/linux/if.h
@@ -0,0 +1,210 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _LINUX_IF_H
+#define _LINUX_IF_H
+#include <linux/types.h>
+#include <linux/socket.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#include <linux/compiler.h>
+#define IFNAMSIZ 16
+#define IFALIASZ 256
+#include <linux/hdlc/ioctl.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_UP 0x1
+#define IFF_BROADCAST 0x2
+#define IFF_DEBUG 0x4
+#define IFF_LOOPBACK 0x8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_POINTOPOINT 0x10
+#define IFF_NOTRAILERS 0x20
+#define IFF_RUNNING 0x40
+#define IFF_NOARP 0x80
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_PROMISC 0x100
+#define IFF_ALLMULTI 0x200
+#define IFF_MASTER 0x400
+#define IFF_SLAVE 0x800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_MULTICAST 0x1000
+#define IFF_PORTSEL 0x2000
+#define IFF_AUTOMEDIA 0x4000
+#define IFF_DYNAMIC 0x8000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_LOWER_UP 0x10000
+#define IFF_DORMANT 0x20000
+#define IFF_ECHO 0x40000
+#define IFF_VOLATILE (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|  IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_802_1Q_VLAN 0x1
+#define IFF_EBRIDGE 0x2
+#define IFF_SLAVE_INACTIVE 0x4
+#define IFF_MASTER_8023AD 0x8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_MASTER_ALB 0x10
+#define IFF_BONDING 0x20
+#define IFF_SLAVE_NEEDARP 0x40
+#define IFF_ISATAP 0x80
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_MASTER_ARPMON 0x100
+#define IFF_WAN_HDLC 0x200
+#define IFF_XMIT_DST_RELEASE 0x400
+#define IFF_DONT_BRIDGE 0x800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_DISABLE_NETPOLL 0x1000
+#define IFF_MACVLAN_PORT 0x2000
+#define IFF_BRIDGE_PORT 0x4000
+#define IFF_OVS_DATAPATH 0x8000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_TX_SKB_SHARING 0x10000
+#define IFF_UNICAST_FLT 0x20000
+#define IFF_TEAM_PORT 0x40000
+#define IFF_SUPP_NOFCS 0x80000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IFF_LIVE_ADDR_CHANGE 0x100000
+#define IF_GET_IFACE 0x0001
+#define IF_GET_PROTO 0x0002
+#define IF_IFACE_V35 0x1000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IF_IFACE_V24 0x1001
+#define IF_IFACE_X21 0x1002
+#define IF_IFACE_T1 0x1003
+#define IF_IFACE_E1 0x1004
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IF_IFACE_SYNC_SERIAL 0x1005
+#define IF_IFACE_X21D 0x1006
+#define IF_PROTO_HDLC 0x2000
+#define IF_PROTO_PPP 0x2001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IF_PROTO_CISCO 0x2002
+#define IF_PROTO_FR 0x2003
+#define IF_PROTO_FR_ADD_PVC 0x2004
+#define IF_PROTO_FR_DEL_PVC 0x2005
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IF_PROTO_X25 0x2006
+#define IF_PROTO_HDLC_ETH 0x2007
+#define IF_PROTO_FR_ADD_ETH_PVC 0x2008
+#define IF_PROTO_FR_DEL_ETH_PVC 0x2009
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define IF_PROTO_FR_PVC 0x200A
+#define IF_PROTO_FR_ETH_PVC 0x200B
+#define IF_PROTO_RAW 0x200C
+enum {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ IF_OPER_UNKNOWN,
+ IF_OPER_NOTPRESENT,
+ IF_OPER_DOWN,
+ IF_OPER_LOWERLAYERDOWN,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ IF_OPER_TESTING,
+ IF_OPER_DORMANT,
+ IF_OPER_UP,
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+enum {
+ IF_LINK_MODE_DEFAULT,
+ IF_LINK_MODE_DORMANT,
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ifmap {
+ unsigned long mem_start;
+ unsigned long mem_end;
+ unsigned short base_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned char irq;
+ unsigned char dma;
+ unsigned char port;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct if_settings {
+ unsigned int type;
+ unsigned int size;
+ union {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ raw_hdlc_proto __user *raw_hdlc;
+ cisco_proto __user *cisco;
+ fr_proto __user *fr;
+ fr_proto_pvc __user *fr_pvc;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ fr_proto_pvc_info __user *fr_pvc_info;
+ sync_serial_settings __user *sync;
+ te1_settings __user *te1;
+ } ifs_ifsu;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+struct ifreq {
+#define IFHWADDRLEN 6
+ union
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ {
+ char ifrn_name[IFNAMSIZ];
+ } ifr_ifrn;
+ union {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct sockaddr ifru_addr;
+ struct sockaddr ifru_dstaddr;
+ struct sockaddr ifru_broadaddr;
+ struct sockaddr ifru_netmask;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct sockaddr ifru_hwaddr;
+ short ifru_flags;
+ int ifru_ivalue;
+ int ifru_mtu;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct ifmap ifru_map;
+ char ifru_slave[IFNAMSIZ];
+ char ifru_newname[IFNAMSIZ];
+ void __user * ifru_data;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct if_settings ifru_settings;
+ } ifr_ifru;
+};
+#define ifr_name ifr_ifrn.ifrn_name
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ifr_hwaddr ifr_ifru.ifru_hwaddr
+#define ifr_addr ifr_ifru.ifru_addr
+#define ifr_dstaddr ifr_ifru.ifru_dstaddr
+#define ifr_broadaddr ifr_ifru.ifru_broadaddr
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ifr_netmask ifr_ifru.ifru_netmask
+#define ifr_flags ifr_ifru.ifru_flags
+#define ifr_metric ifr_ifru.ifru_ivalue
+#define ifr_mtu ifr_ifru.ifru_mtu
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ifr_map ifr_ifru.ifru_map
+#define ifr_slave ifr_ifru.ifru_slave
+#define ifr_data ifr_ifru.ifru_data
+#define ifr_ifindex ifr_ifru.ifru_ivalue
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ifr_bandwidth ifr_ifru.ifru_ivalue
+#define ifr_qlen ifr_ifru.ifru_ivalue
+#define ifr_newname ifr_ifru.ifru_newname
+#define ifr_settings ifr_ifru.ifru_settings
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct ifconf {
+ int ifc_len;
+ union {
+ char __user *ifcu_buf;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct ifreq __user *ifcu_req;
+ } ifc_ifcu;
+};
+#define ifc_buf ifc_ifcu.ifcu_buf
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ifc_req ifc_ifcu.ifcu_req
+#endif