Initial Contribution
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_ */