root/include/uapi/linux/ip.h

INCLUDED FROM

/*
 * 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 _UAPI_LINUX_IP_H
#define _UAPI_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;
};

/* index values for the variables in ipv4_devconf */
enum
{
        IPV4_DEVCONF_FORWARDING=1,
        IPV4_DEVCONF_MC_FORWARDING,
        IPV4_DEVCONF_PROXY_ARP,
        IPV4_DEVCONF_ACCEPT_REDIRECTS,
        IPV4_DEVCONF_SECURE_REDIRECTS,
        IPV4_DEVCONF_SEND_REDIRECTS,
        IPV4_DEVCONF_SHARED_MEDIA,
        IPV4_DEVCONF_RP_FILTER,
        IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE,
        IPV4_DEVCONF_BOOTP_RELAY,
        IPV4_DEVCONF_LOG_MARTIANS,
        IPV4_DEVCONF_TAG,
        IPV4_DEVCONF_ARPFILTER,
        IPV4_DEVCONF_MEDIUM_ID,
        IPV4_DEVCONF_NOXFRM,
        IPV4_DEVCONF_NOPOLICY,
        IPV4_DEVCONF_FORCE_IGMP_VERSION,
        IPV4_DEVCONF_ARP_ANNOUNCE,
        IPV4_DEVCONF_ARP_IGNORE,
        IPV4_DEVCONF_PROMOTE_SECONDARIES,
        IPV4_DEVCONF_ARP_ACCEPT,
        IPV4_DEVCONF_ARP_NOTIFY,
        IPV4_DEVCONF_ACCEPT_LOCAL,
        IPV4_DEVCONF_SRC_VMARK,
        IPV4_DEVCONF_PROXY_ARP_PVLAN,
        IPV4_DEVCONF_ROUTE_LOCALNET,
        IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL,
        IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL,
        __IPV4_DEVCONF_MAX
};

#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)

#endif /* _UAPI_LINUX_IP_H */