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 _UAPI_LINUX_IP_H 18#define _UAPI_LINUX_IP_H 19#include <linux/types.h> 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) 60#define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY) 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 83#define IPV4_BEET_PHMAXLEN 8 84 85struct 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; 96 __be16 tot_len; 97 __be16 id; 98 __be16 frag_off; 99 __u8 ttl; 100 __u8 protocol; 101 __sum16 check; 102 __be32 saddr; 103 __be32 daddr; 104 /*The options start here. */ 105}; 106 107 108struct ip_auth_hdr { 109 __u8 nexthdr; 110 __u8 hdrlen; /* This one is measured in 32 bit units! */ 111 __be16 reserved; 112 __be32 spi; 113 __be32 seq_no; /* Sequence number */ 114 __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ 115}; 116 117struct ip_esp_hdr { 118 __be32 spi; 119 __be32 seq_no; /* Sequence number */ 120 __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ 121}; 122 123struct ip_comp_hdr { 124 __u8 nexthdr; 125 __u8 flags; 126 __be16 cpi; 127}; 128 129struct ip_beet_phdr { 130 __u8 nexthdr; 131 __u8 hdrlen; 132 __u8 padlen; 133 __u8 reserved; 134}; 135 136/* index values for the variables in ipv4_devconf */ 137enum 138{ 139 IPV4_DEVCONF_FORWARDING=1, 140 IPV4_DEVCONF_MC_FORWARDING, 141 IPV4_DEVCONF_PROXY_ARP, 142 IPV4_DEVCONF_ACCEPT_REDIRECTS, 143 IPV4_DEVCONF_SECURE_REDIRECTS, 144 IPV4_DEVCONF_SEND_REDIRECTS, 145 IPV4_DEVCONF_SHARED_MEDIA, 146 IPV4_DEVCONF_RP_FILTER, 147 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, 148 IPV4_DEVCONF_BOOTP_RELAY, 149 IPV4_DEVCONF_LOG_MARTIANS, 150 IPV4_DEVCONF_TAG, 151 IPV4_DEVCONF_ARPFILTER, 152 IPV4_DEVCONF_MEDIUM_ID, 153 IPV4_DEVCONF_NOXFRM, 154 IPV4_DEVCONF_NOPOLICY, 155 IPV4_DEVCONF_FORCE_IGMP_VERSION, 156 IPV4_DEVCONF_ARP_ANNOUNCE, 157 IPV4_DEVCONF_ARP_IGNORE, 158 IPV4_DEVCONF_PROMOTE_SECONDARIES, 159 IPV4_DEVCONF_ARP_ACCEPT, 160 IPV4_DEVCONF_ARP_NOTIFY, 161 IPV4_DEVCONF_ACCEPT_LOCAL, 162 IPV4_DEVCONF_SRC_VMARK, 163 IPV4_DEVCONF_PROXY_ARP_PVLAN, 164 IPV4_DEVCONF_ROUTE_LOCALNET, 165 IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL, 166 IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL, 167 __IPV4_DEVCONF_MAX 168}; 169 170#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) 171 172#endif /* _UAPI_LINUX_IP_H */ 173