Quelle ip.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* 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 <linux/stddef.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 "
#endif
__u8 tos;
__be16 tot_len;
__be16 id;
__be16 frag_off;
__u8 ttl;
__u8 protocol;
__sum16 check;
__struct_group(/* no tag */, addrs, /* no attrs */,
  __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[]; /* Variable len but >=4. Mind the 64 bit alignment! */
};

struct ip_esp_hdr {
__be32 spi;
__be32 seq_no;  /* Sequence number */
__u8  enc_data[]; /* 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;
};

struct ip_iptfs_hdr {
__u8 subtype;  /* 0*: basic, 1: CC */
__u8 flags;
__be16 block_offset;
};

struct ip_iptfs_cc_hdr {
__u8 subtype;  /* 0: basic, 1*: CC */
__u8 flags;
__be16 block_offset;
__be32 loss_rate;
__be64 rtt_adelay_xdelay;
__be32 tval;
__be32 techo;
};

/* 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_IGNORE_ROUTES_WITH_LINKDOWN,
IPV4_DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
IPV4_DEVCONF_DROP_GRATUITOUS_ARP,
IPV4_DEVCONF_BC_FORWARDING,
IPV4_DEVCONF_ARP_EVICT_NOCARRIER,
__IPV4_DEVCONF_MAX
};

#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)

#endif /* _UAPI_LINUX_IP_H */

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