diff --git a/libc/include/netinet/ip.h b/libc/include/netinet/ip.h
new file mode 100644
index 0000000..541905c
--- /dev/null
+++ b/libc/include/netinet/ip.h
@@ -0,0 +1,275 @@
+/*	$OpenBSD: ip.h,v 1.12 2006/04/27 02:19:32 tedu Exp $	*/
+/*	$NetBSD: ip.h,v 1.9 1995/05/15 01:22:44 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ip.h	8.1 (Berkeley) 6/10/93
+ */
+
+#ifndef _NETINET_IP_H_
+#define _NETINET_IP_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <endian.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+
+__BEGIN_DECLS
+
+/*
+ * Definitions for internet protocol version 4.
+ * Per RFC 791, September 1981.
+ */
+#define	IPVERSION	4
+
+/*
+ * Structure of an internet header, naked of options.
+ */
+struct ip {
+#if BYTE_ORDER == LITTLE_ENDIAN
+	u_int32_t ip_hl:4,		/* header length */
+		  ip_v:4;		/* version */
+#endif
+#if BYTE_ORDER == BIG_ENDIAN
+	u_int32_t ip_v:4,		/* version */
+		  ip_hl:4;		/* header length */
+#endif
+	u_int8_t  ip_tos;		/* type of service */
+	u_int16_t ip_len;		/* total length */
+	u_int16_t ip_id;		/* identification */
+	u_int16_t ip_off;		/* fragment offset field */
+#define	IP_RF 0x8000			/* reserved fragment flag */
+#define	IP_DF 0x4000			/* dont fragment flag */
+#define	IP_MF 0x2000			/* more fragments flag */
+#define	IP_OFFMASK 0x1fff		/* mask for fragmenting bits */
+	u_int8_t  ip_ttl;		/* time to live */
+	u_int8_t  ip_p;			/* protocol */
+	u_int16_t ip_sum;		/* checksum */
+	struct	  in_addr ip_src, ip_dst; /* source and dest address */
+};
+
+#define	IP_MAXPACKET	65535		/* maximum packet size */
+
+/*
+ * Definitions for IP type of service (ip_tos)
+ */
+#define	IPTOS_LOWDELAY		0x10
+#define	IPTOS_THROUGHPUT	0x08
+#define	IPTOS_RELIABILITY	0x04
+/*	IPTOS_LOWCOST		0x02 XXX */
+#if 1
+/* ECN RFC3168 obsoletes RFC2481, and these will be deprecated soon. */
+#define IPTOS_CE		0x01	/* congestion experienced */
+#define IPTOS_ECT		0x02	/* ECN-capable transport */
+#endif
+
+/*
+ * Definitions for IP precedence (also in ip_tos) (hopefully unused)
+ */
+#define	IPTOS_PREC_NETCONTROL		0xe0
+#define	IPTOS_PREC_INTERNETCONTROL	0xc0
+#define	IPTOS_PREC_CRITIC_ECP		0xa0
+#define	IPTOS_PREC_FLASHOVERRIDE	0x80
+#define	IPTOS_PREC_FLASH		0x60
+#define	IPTOS_PREC_IMMEDIATE		0x40
+#define	IPTOS_PREC_PRIORITY		0x20
+#define	IPTOS_PREC_ROUTINE		0x00
+
+/*
+ * ECN (Explicit Congestion Notification) codepoints in RFC3168
+ * mapped to the lower 2 bits of the TOS field.
+ */
+#define	IPTOS_ECN_NOTECT	0x00	/* not-ECT */
+#define	IPTOS_ECN_ECT1		0x01	/* ECN-capable transport (1) */
+#define	IPTOS_ECN_ECT0		0x02	/* ECN-capable transport (0) */
+#define	IPTOS_ECN_CE		0x03	/* congestion experienced */
+#define	IPTOS_ECN_MASK		0x03	/* ECN field mask */
+
+/*
+ * Definitions for options.
+ */
+#define	IPOPT_COPIED(o)		((o)&0x80)
+#define	IPOPT_CLASS(o)		((o)&0x60)
+#define	IPOPT_NUMBER(o)		((o)&0x1f)
+
+#define	IPOPT_CONTROL		0x00
+#define	IPOPT_RESERVED1		0x20
+#define	IPOPT_DEBMEAS		0x40
+#define	IPOPT_RESERVED2		0x60
+
+#define	IPOPT_EOL		0		/* end of option list */
+#define	IPOPT_NOP		1		/* no operation */
+
+#define	IPOPT_RR		7		/* record packet route */
+#define	IPOPT_TS		68		/* timestamp */
+#define	IPOPT_SECURITY		130		/* provide s,c,h,tcc */
+#define	IPOPT_LSRR		131		/* loose source route */
+#define	IPOPT_SATID		136		/* satnet id */
+#define	IPOPT_SSRR		137		/* strict source route */
+
+/*
+ * Offsets to fields in options other than EOL and NOP.
+ */
+#define	IPOPT_OPTVAL		0		/* option ID */
+#define	IPOPT_OLEN		1		/* option length */
+#define	IPOPT_OFFSET		2		/* offset within option */
+#define	IPOPT_MINOFF		4		/* min value of above */
+
+/*
+ * Time stamp option structure.
+ */
+struct	ip_timestamp {
+	u_int8_t ipt_code;		/* IPOPT_TS */
+	u_int8_t ipt_len;		/* size of structure (variable) */
+	u_int8_t ipt_ptr;		/* index of current entry */
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+	u_int32_t ipt_flg:4,		/* flags, see below */
+		  ipt_oflw:4;		/* overflow counter */
+#endif
+#if _BYTE_ORDER == _BIG_ENDIAN
+	u_int32_t ipt_oflw:4,		/* overflow counter */
+		  ipt_flg:4;		/* flags, see below */
+#endif
+	union ipt_timestamp {
+	n_time	ipt_time[1];
+	struct	ipt_ta {
+		struct in_addr ipt_addr;
+		n_time ipt_time;
+	} ipt_ta[1];
+	} ipt_timestamp;
+};
+
+/* flag bits for ipt_flg */
+#define	IPOPT_TS_TSONLY		0		/* timestamps only */
+#define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
+#define	IPOPT_TS_PRESPEC	3		/* specified modules only */
+
+/* bits for security (not byte swapped) */
+#define	IPOPT_SECUR_UNCLASS	0x0000
+#define	IPOPT_SECUR_CONFID	0xf135
+#define	IPOPT_SECUR_EFTO	0x789a
+#define	IPOPT_SECUR_MMMM	0xbc4d
+#define	IPOPT_SECUR_RESTR	0xaf13
+#define	IPOPT_SECUR_SECRET	0xd788
+#define	IPOPT_SECUR_TOPSECRET	0x6bc5
+
+/*
+ * Internet implementation parameters.
+ */
+#define	MAXTTL		255		/* maximum time to live (seconds) */
+#define	IPDEFTTL	64		/* default ttl, from RFC 1340 */
+#define	IPFRAGTTL	60		/* time to live for frags, slowhz */
+#define	IPTTLDEC	1		/* subtracted when forwarding */
+
+#define	IP_MSS		576		/* default maximum segment size */
+
+/*
+ * This is the real IPv4 pseudo header, used for computing the TCP and UDP
+ * checksums. For the Internet checksum, struct ipovly can be used instead.
+ * For stronger checksums, the real thing must be used.
+ */
+struct ippseudo {
+	struct    in_addr ippseudo_src;	/* source internet address */
+	struct    in_addr ippseudo_dst;	/* destination internet address */
+	u_int8_t  ippseudo_pad;		/* pad, must be zero */
+	u_int8_t  ippseudo_p;		/* protocol */
+	u_int16_t ippseudo_len;		/* protocol length */
+};
+
+/* BIONIC addition: declarations matching the Linux kernel */
+/*                  some programs expect these...          */
+
+#define IPOPT_OPTVAL 0
+#define IPOPT_OLEN   1
+#define IPOPT_OFFSET 2
+#define IPOPT_MINOFF 4
+#define MAX_IPOPTLEN 40
+
+#define IPOPT_COPY		0x80
+#define IPOPT_CLASS_MASK	0x60
+#define IPOPT_NUMBER_MASK	0x1f
+
+#define	IPOPT_CONTROL		0x00
+#define	IPOPT_RESERVED1		0x20
+#define	IPOPT_MEASUREMENT	0x40
+#define	IPOPT_RESERVED2		0x60
+
+#define IPOPT_END	(0 |IPOPT_CONTROL)
+#define IPOPT_NOOP	(1 |IPOPT_CONTROL)
+#define IPOPT_SEC	(2 |IPOPT_CONTROL|IPOPT_COPY)
+#define IPOPT_TIMESTAMP	(4 |IPOPT_MEASUREMENT)
+#define IPOPT_SID	(8 |IPOPT_CONTROL|IPOPT_COPY)
+#define IPOPT_RA	(20|IPOPT_CONTROL|IPOPT_COPY)
+
+struct iphdr {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+	uint8_t  ihl    :4,
+		 version:4;
+#elif defined (__BIG_ENDIAN_BITFIELD)
+	uint8_t  version:4,
+  		 ihl    :4;
+#else
+#error	"Please fix <asm/byteorder.h>"
+#endif
+	uint8_t	  tos;
+	uint16_t  tot_len;
+	uint16_t  id;
+	uint16_t  frag_off;
+	uint8_t   ttl;
+	uint8_t   protocol;
+	uint16_t  check;
+	int32_t   saddr;
+	int32_t   daddr;
+};
+
+struct ip_auth_hdr {
+	uint8_t  nexthdr;
+	uint8_t  hdrlen;
+	uint16_t reserved;
+	uint32_t spi;
+	uint32_t seq_no;
+	uint8_t  auth_data[0];
+};
+
+struct ip_esp_hdr {
+	uint32_t spi;
+	uint32_t seq_no;
+	uint8_t  enc_data[0];
+};
+
+struct ip_comp_hdr {
+	uint8_t  nexthdr;
+	uint8_t  flags;
+	uint16_t cpi;
+};
+
+__END_DECLS
+
+#endif /* _NETINET_IP_H_ */