[net-next-2.6.git] / include / linux / ip.h

/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the IP protocol.
 *
 * Version:	@(#)ip.h	1.0.2	04/28/93
 *
 * Authors:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
#ifndef _LINUX_IP_H
#define _LINUX_IP_H
#include <linux/types.h>
#include <asm/byteorder.h>

#define IPTOS_TOS_MASK		0x1E
#define IPTOS_TOS(tos)		((tos)&IPTOS_TOS_MASK)
#define	IPTOS_LOWDELAY		0x10
#define	IPTOS_THROUGHPUT	0x08
#define	IPTOS_RELIABILITY	0x04
#define	IPTOS_MINCOST		0x02

#define IPTOS_PREC_MASK		0xE0
#define IPTOS_PREC(tos)		((tos)&IPTOS_PREC_MASK)
#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


/* IP options */
#define IPOPT_COPY		0x80
#define IPOPT_CLASS_MASK	0x60
#define IPOPT_NUMBER_MASK	0x1f

#define	IPOPT_COPIED(o)		((o)&IPOPT_COPY)
#define	IPOPT_CLASS(o)		((o)&IPOPT_CLASS_MASK)
#define	IPOPT_NUMBER(o)		((o)&IPOPT_NUMBER_MASK)

#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_LSRR	(3 |IPOPT_CONTROL|IPOPT_COPY)
#define IPOPT_TIMESTAMP	(4 |IPOPT_MEASUREMENT)
#define IPOPT_CIPSO	(6 |IPOPT_CONTROL|IPOPT_COPY)
#define IPOPT_RR	(7 |IPOPT_CONTROL)
#define IPOPT_SID	(8 |IPOPT_CONTROL|IPOPT_COPY)
#define IPOPT_SSRR	(9 |IPOPT_CONTROL|IPOPT_COPY)
#define IPOPT_RA	(20|IPOPT_CONTROL|IPOPT_COPY)

#define IPVERSION	4
#define MAXTTL		255
#define IPDEFTTL	64

#define IPOPT_OPTVAL 0
#define IPOPT_OLEN   1
#define IPOPT_OFFSET 2
#define IPOPT_MINOFF 4
#define MAX_IPOPTLEN 40
#define IPOPT_NOP IPOPT_NOOP
#define IPOPT_EOL IPOPT_END
#define IPOPT_TS  IPOPT_TIMESTAMP

#define	IPOPT_TS_TSONLY		0		/* timestamps only */
#define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
#define	IPOPT_TS_PRESPEC	3		/* specified modules only */

#define IPV4_BEET_PHMAXLEN 8

struct iphdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__u8	ihl:4,
		version:4;
#elif defined (__BIG_ENDIAN_BITFIELD)
	__u8	version:4,
  		ihl:4;
#else
#error	"Please fix <asm/byteorder.h>"
#endif
	__u8	tos;
	__be16	tot_len;
	__be16	id;
	__be16	frag_off;
	__u8	ttl;
	__u8	protocol;
	__sum16	check;
	__be32	saddr;
	__be32	daddr;
	/*The options start here. */
};

#ifdef __KERNEL__
#include <linux/skbuff.h>

static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
{
	return (struct iphdr *)skb_network_header(skb);
}

static inline struct iphdr *ipip_hdr(const struct sk_buff *skb)
{
	return (struct iphdr *)skb_transport_header(skb);
}
#endif

struct ip_auth_hdr {
	__u8  nexthdr;
	__u8  hdrlen;		/* This one is measured in 32 bit units! */
	__be16 reserved;
	__be32 spi;
	__be32 seq_no;		/* Sequence number */
	__u8  auth_data[0];	/* Variable len but >=4. Mind the 64 bit alignment! */
};

struct ip_esp_hdr {
	__be32 spi;
	__be32 seq_no;		/* Sequence number */
	__u8  enc_data[0];	/* Variable len but >=8. Mind the 64 bit alignment! */
};

struct ip_comp_hdr {
	__u8 nexthdr;
	__u8 flags;
	__be16 cpi;
};

struct ip_beet_phdr {
	__u8 nexthdr;
	__u8 hdrlen;
	__u8 padlen;
	__u8 reserved;
};

#endif	/* _LINUX_IP_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* INET An implementation of the TCP/IP protocol suite for the LINUX
	3	* operating system. INET is implemented using the BSD Socket
	4	* interface as the means of communication with the user level.
	5	*
	6	* Definitions for the IP protocol.
	7	*
	8	* Version: @(#)ip.h 1.0.2 04/28/93
	9	*
	10	* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* as published by the Free Software Foundation; either version
	15	* 2 of the License, or (at your option) any later version.
	16	*/
	17	#ifndef _LINUX_IP_H
	18	#define _LINUX_IP_H
14c85021	19	#include <linux/types.h>
1da177e4 LT	20	#include <asm/byteorder.h>
	21
	22	#define IPTOS_TOS_MASK 0x1E
	23	#define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
	24	#define IPTOS_LOWDELAY 0x10
	25	#define IPTOS_THROUGHPUT 0x08
	26	#define IPTOS_RELIABILITY 0x04
	27	#define IPTOS_MINCOST 0x02
	28
	29	#define IPTOS_PREC_MASK 0xE0
	30	#define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
	31	#define IPTOS_PREC_NETCONTROL 0xe0
	32	#define IPTOS_PREC_INTERNETCONTROL 0xc0
	33	#define IPTOS_PREC_CRITIC_ECP 0xa0
	34	#define IPTOS_PREC_FLASHOVERRIDE 0x80
	35	#define IPTOS_PREC_FLASH 0x60
	36	#define IPTOS_PREC_IMMEDIATE 0x40
	37	#define IPTOS_PREC_PRIORITY 0x20
	38	#define IPTOS_PREC_ROUTINE 0x00
	39
	40
	41	/* IP options */
	42	#define IPOPT_COPY 0x80
	43	#define IPOPT_CLASS_MASK 0x60
	44	#define IPOPT_NUMBER_MASK 0x1f
	45
	46	#define IPOPT_COPIED(o) ((o)&IPOPT_COPY)
	47	#define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK)
	48	#define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK)
	49
	50	#define IPOPT_CONTROL 0x00
	51	#define IPOPT_RESERVED1 0x20
	52	#define IPOPT_MEASUREMENT 0x40
	53	#define IPOPT_RESERVED2 0x60
	54
	55	#define IPOPT_END (0 \|IPOPT_CONTROL)
	56	#define IPOPT_NOOP (1 \|IPOPT_CONTROL)
	57	#define IPOPT_SEC (2 \|IPOPT_CONTROL\|IPOPT_COPY)
	58	#define IPOPT_LSRR (3 \|IPOPT_CONTROL\|IPOPT_COPY)
	59	#define IPOPT_TIMESTAMP (4 \|IPOPT_MEASUREMENT)
11a03f78	60	#define IPOPT_CIPSO (6 \|IPOPT_CONTROL\|IPOPT_COPY)
1da177e4 LT	61	#define IPOPT_RR (7 \|IPOPT_CONTROL)
	62	#define IPOPT_SID (8 \|IPOPT_CONTROL\|IPOPT_COPY)
	63	#define IPOPT_SSRR (9 \|IPOPT_CONTROL\|IPOPT_COPY)
	64	#define IPOPT_RA (20\|IPOPT_CONTROL\|IPOPT_COPY)
	65
	66	#define IPVERSION 4
	67	#define MAXTTL 255
	68	#define IPDEFTTL 64
	69
	70	#define IPOPT_OPTVAL 0
	71	#define IPOPT_OLEN 1
	72	#define IPOPT_OFFSET 2
	73	#define IPOPT_MINOFF 4
	74	#define MAX_IPOPTLEN 40
	75	#define IPOPT_NOP IPOPT_NOOP
	76	#define IPOPT_EOL IPOPT_END
	77	#define IPOPT_TS IPOPT_TIMESTAMP
	78
	79	#define IPOPT_TS_TSONLY 0 /* timestamps only */
	80	#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
	81	#define IPOPT_TS_PRESPEC 3 /* specified modules only */
	82
0a69452c DB	83	#define IPV4_BEET_PHMAXLEN 8
0a69452c DB	84
1da177e4 LT	85	struct iphdr {
	86	#if defined(__LITTLE_ENDIAN_BITFIELD)
	87	__u8 ihl:4,
	88	version:4;
	89	#elif defined (__BIG_ENDIAN_BITFIELD)
	90	__u8 version:4,
	91	ihl:4;
	92	#else
	93	#error "Please fix <asm/byteorder.h>"
	94	#endif
	95	__u8 tos;
76ab608d AD	96	__be16 tot_len;
	97	__be16 id;
	98	__be16 frag_off;
1da177e4 LT	99	__u8 ttl;
1da177e4 LT	100	__u8 protocol;
9981a0e3	101	__sum16 check;
76ab608d AD	102	__be32 saddr;
76ab608d AD	103	__be32 daddr;
1da177e4 LT	104	/The options start here. /
	105	};
	106
eddc9ec5 ACM	107	#ifdef __KERNEL__
	108	#include <linux/skbuff.h>
	109
	110	static inline struct iphdr ip_hdr(const struct sk_buff skb)
	111	{
	112	return (struct iphdr *)skb_network_header(skb);
	113	}
b0061ce4 ACM	114
	115	static inline struct iphdr ipip_hdr(const struct sk_buff skb)
	116	{
9c70220b	117	return (struct iphdr *)skb_transport_header(skb);
b0061ce4	118	}
eddc9ec5 ACM	119	#endif
eddc9ec5 ACM	120
1da177e4 LT	121	struct ip_auth_hdr {
	122	__u8 nexthdr;
	123	__u8 hdrlen; /* This one is measured in 32 bit units! */
046d0331 AV	124	__be16 reserved;
	125	__be32 spi;
	126	__be32 seq_no; /* Sequence number */
1da177e4 LT	127	__u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */
	128	};
	129
	130	struct ip_esp_hdr {
046d0331 AV	131	__be32 spi;
046d0331 AV	132	__be32 seq_no; /* Sequence number */
1da177e4 LT	133	__u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */
	134	};
	135
	136	struct ip_comp_hdr {
	137	__u8 nexthdr;
	138	__u8 flags;
046d0331	139	__be16 cpi;
1da177e4 LT	140	};
1da177e4 LT	141
0a69452c DB	142	struct ip_beet_phdr {
	143	__u8 nexthdr;
	144	__u8 hdrlen;
	145	__u8 padlen;
	146	__u8 reserved;
	147	};
	148
1da177e4	149	#endif /* _LINUX_IP_H */