/*
 * 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. */
};


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 */