ip.h (4778B)
1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2/* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * Definitions for the IP protocol. 8 * 9 * Version: @(#)ip.h 1.0.2 04/28/93 10 * 11 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12 * 13 * This program is free software; you can redistribute it and/or 14 * modify it under the terms of the GNU General Public License 15 * as published by the Free Software Foundation; either version 16 * 2 of the License, or (at your option) any later version. 17 */ 18#ifndef _UAPI_LINUX_IP_H 19#define _UAPI_LINUX_IP_H 20#include <linux/types.h> 21#include <asm/byteorder.h> 22 23#define IPTOS_TOS_MASK 0x1E 24#define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) 25#define IPTOS_LOWDELAY 0x10 26#define IPTOS_THROUGHPUT 0x08 27#define IPTOS_RELIABILITY 0x04 28#define IPTOS_MINCOST 0x02 29 30#define IPTOS_PREC_MASK 0xE0 31#define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) 32#define IPTOS_PREC_NETCONTROL 0xe0 33#define IPTOS_PREC_INTERNETCONTROL 0xc0 34#define IPTOS_PREC_CRITIC_ECP 0xa0 35#define IPTOS_PREC_FLASHOVERRIDE 0x80 36#define IPTOS_PREC_FLASH 0x60 37#define IPTOS_PREC_IMMEDIATE 0x40 38#define IPTOS_PREC_PRIORITY 0x20 39#define IPTOS_PREC_ROUTINE 0x00 40 41 42/* IP options */ 43#define IPOPT_COPY 0x80 44#define IPOPT_CLASS_MASK 0x60 45#define IPOPT_NUMBER_MASK 0x1f 46 47#define IPOPT_COPIED(o) ((o)&IPOPT_COPY) 48#define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) 49#define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) 50 51#define IPOPT_CONTROL 0x00 52#define IPOPT_RESERVED1 0x20 53#define IPOPT_MEASUREMENT 0x40 54#define IPOPT_RESERVED2 0x60 55 56#define IPOPT_END (0 |IPOPT_CONTROL) 57#define IPOPT_NOOP (1 |IPOPT_CONTROL) 58#define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) 59#define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY) 60#define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) 61#define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY) 62#define IPOPT_RR (7 |IPOPT_CONTROL) 63#define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) 64#define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY) 65#define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) 66 67#define IPVERSION 4 68#define MAXTTL 255 69#define IPDEFTTL 64 70 71#define IPOPT_OPTVAL 0 72#define IPOPT_OLEN 1 73#define IPOPT_OFFSET 2 74#define IPOPT_MINOFF 4 75#define MAX_IPOPTLEN 40 76#define IPOPT_NOP IPOPT_NOOP 77#define IPOPT_EOL IPOPT_END 78#define IPOPT_TS IPOPT_TIMESTAMP 79 80#define IPOPT_TS_TSONLY 0 /* timestamps only */ 81#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 82#define IPOPT_TS_PRESPEC 3 /* specified modules only */ 83 84#define IPV4_BEET_PHMAXLEN 8 85 86struct iphdr { 87#if defined(__LITTLE_ENDIAN_BITFIELD) 88 __u8 ihl:4, 89 version:4; 90#elif defined (__BIG_ENDIAN_BITFIELD) 91 __u8 version:4, 92 ihl:4; 93#else 94#error "Please fix <asm/byteorder.h>" 95#endif 96 __u8 tos; 97 __be16 tot_len; 98 __be16 id; 99 __be16 frag_off; 100 __u8 ttl; 101 __u8 protocol; 102 __sum16 check; 103 __be32 saddr; 104 __be32 daddr; 105 /*The options start here. */ 106}; 107 108 109struct ip_auth_hdr { 110 __u8 nexthdr; 111 __u8 hdrlen; /* This one is measured in 32 bit units! */ 112 __be16 reserved; 113 __be32 spi; 114 __be32 seq_no; /* Sequence number */ 115 __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ 116}; 117 118struct ip_esp_hdr { 119 __be32 spi; 120 __be32 seq_no; /* Sequence number */ 121 __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ 122}; 123 124struct ip_comp_hdr { 125 __u8 nexthdr; 126 __u8 flags; 127 __be16 cpi; 128}; 129 130struct ip_beet_phdr { 131 __u8 nexthdr; 132 __u8 hdrlen; 133 __u8 padlen; 134 __u8 reserved; 135}; 136 137/* index values for the variables in ipv4_devconf */ 138enum 139{ 140 IPV4_DEVCONF_FORWARDING=1, 141 IPV4_DEVCONF_MC_FORWARDING, 142 IPV4_DEVCONF_PROXY_ARP, 143 IPV4_DEVCONF_ACCEPT_REDIRECTS, 144 IPV4_DEVCONF_SECURE_REDIRECTS, 145 IPV4_DEVCONF_SEND_REDIRECTS, 146 IPV4_DEVCONF_SHARED_MEDIA, 147 IPV4_DEVCONF_RP_FILTER, 148 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, 149 IPV4_DEVCONF_BOOTP_RELAY, 150 IPV4_DEVCONF_LOG_MARTIANS, 151 IPV4_DEVCONF_TAG, 152 IPV4_DEVCONF_ARPFILTER, 153 IPV4_DEVCONF_MEDIUM_ID, 154 IPV4_DEVCONF_NOXFRM, 155 IPV4_DEVCONF_NOPOLICY, 156 IPV4_DEVCONF_FORCE_IGMP_VERSION, 157 IPV4_DEVCONF_ARP_ANNOUNCE, 158 IPV4_DEVCONF_ARP_IGNORE, 159 IPV4_DEVCONF_PROMOTE_SECONDARIES, 160 IPV4_DEVCONF_ARP_ACCEPT, 161 IPV4_DEVCONF_ARP_NOTIFY, 162 IPV4_DEVCONF_ACCEPT_LOCAL, 163 IPV4_DEVCONF_SRC_VMARK, 164 IPV4_DEVCONF_PROXY_ARP_PVLAN, 165 IPV4_DEVCONF_ROUTE_LOCALNET, 166 IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL, 167 IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL, 168 IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN, 169 IPV4_DEVCONF_DROP_UNICAST_IN_L2_MULTICAST, 170 IPV4_DEVCONF_DROP_GRATUITOUS_ARP, 171 IPV4_DEVCONF_BC_FORWARDING, 172 IPV4_DEVCONF_ARP_EVICT_NOCARRIER, 173 __IPV4_DEVCONF_MAX 174}; 175 176#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) 177 178#endif /* _UAPI_LINUX_IP_H */