libc/include/netinet/ip.h - platform/bionic - Git at Google

 /*	$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
 #define	IPTOS_MINCOST		0x02
 #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_ */
	/* $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
	#define IPTOS_MINCOST 0x02
	#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_ */