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 of the Internet Protocol. 7 * 8 * Version: @(#)in.h 1.0.1 04/21/93 9 * 10 * Authors: Original taken from the GNU Project <netinet/in.h> file. 11 * 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 _LINUX_IN_H 19#define _LINUX_IN_H 20 21#include <linux/types.h> 22#include <linux/socket.h> 23 24/* Standard well-defined IP protocols. */ 25enum { 26 IPPROTO_IP = 0, /* Dummy protocol for TCP */ 27 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ 28 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */ 29 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ 30 IPPROTO_TCP = 6, /* Transmission Control Protocol */ 31 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ 32 IPPROTO_PUP = 12, /* PUP protocol */ 33 IPPROTO_UDP = 17, /* User Datagram Protocol */ 34 IPPROTO_IDP = 22, /* XNS IDP protocol */ 35 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ 36 IPPROTO_RSVP = 46, /* RSVP protocol */ 37 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ 38 39 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ 40 41 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ 42 IPPROTO_AH = 51, /* Authentication Header protocol */ 43 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */ 44 IPPROTO_PIM = 103, /* Protocol Independent Multicast */ 45 46 IPPROTO_COMP = 108, /* Compression Header protocol */ 47 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ 48 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */ 49 50 IPPROTO_RAW = 255, /* Raw IP packets */ 51 IPPROTO_MAX 52}; 53 54 55/* Internet address. */ 56struct in_addr { 57 __be32 s_addr; 58}; 59 60#define IP_TOS 1 61#define IP_TTL 2 62#define IP_HDRINCL 3 63#define IP_OPTIONS 4 64#define IP_ROUTER_ALERT 5 65#define IP_RECVOPTS 6 66#define IP_RETOPTS 7 67#define IP_PKTINFO 8 68#define IP_PKTOPTIONS 9 69#define IP_MTU_DISCOVER 10 70#define IP_RECVERR 11 71#define IP_RECVTTL 12 72#define IP_RECVTOS 13 73#define IP_MTU 14 74#define IP_FREEBIND 15 75#define IP_IPSEC_POLICY 16 76#define IP_XFRM_POLICY 17 77#define IP_PASSSEC 18 78#define IP_TRANSPARENT 19 79 80/* BSD compatibility */ 81#define IP_RECVRETOPTS IP_RETOPTS 82 83/* TProxy original addresses */ 84#define IP_ORIGDSTADDR 20 85#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR 86 87#define IP_MINTTL 21 88#define IP_NODEFRAG 22 89 90/* IP_MTU_DISCOVER values */ 91#define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 92#define IP_PMTUDISC_WANT 1 /* Use per route hints */ 93#define IP_PMTUDISC_DO 2 /* Always DF */ 94#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ 95 96#define IP_MULTICAST_IF 32 97#define IP_MULTICAST_TTL 33 98#define IP_MULTICAST_LOOP 34 99#define IP_ADD_MEMBERSHIP 35 100#define IP_DROP_MEMBERSHIP 36 101#define IP_UNBLOCK_SOURCE 37 102#define IP_BLOCK_SOURCE 38 103#define IP_ADD_SOURCE_MEMBERSHIP 39 104#define IP_DROP_SOURCE_MEMBERSHIP 40 105#define IP_MSFILTER 41 106#define MCAST_JOIN_GROUP 42 107#define MCAST_BLOCK_SOURCE 43 108#define MCAST_UNBLOCK_SOURCE 44 109#define MCAST_LEAVE_GROUP 45 110#define MCAST_JOIN_SOURCE_GROUP 46 111#define MCAST_LEAVE_SOURCE_GROUP 47 112#define MCAST_MSFILTER 48 113#define IP_MULTICAST_ALL 49 114 115#define MCAST_EXCLUDE 0 116#define MCAST_INCLUDE 1 117 118/* These need to appear somewhere around here */ 119#define IP_DEFAULT_MULTICAST_TTL 1 120#define IP_DEFAULT_MULTICAST_LOOP 1 121 122/* Request struct for multicast socket ops */ 123 124struct ip_mreq { 125 struct in_addr imr_multiaddr; /* IP multicast address of group */ 126 struct in_addr imr_interface; /* local IP address of interface */ 127}; 128 129struct ip_mreqn { 130 struct in_addr imr_multiaddr; /* IP multicast address of group */ 131 struct in_addr imr_address; /* local IP address of interface */ 132 int imr_ifindex; /* Interface index */ 133}; 134 135struct ip_mreq_source { 136 __be32 imr_multiaddr; 137 __be32 imr_interface; 138 __be32 imr_sourceaddr; 139}; 140 141struct ip_msfilter { 142 __be32 imsf_multiaddr; 143 __be32 imsf_interface; 144 __u32 imsf_fmode; 145 __u32 imsf_numsrc; 146 __be32 imsf_slist[1]; 147}; 148 149#define IP_MSFILTER_SIZE(numsrc) \ 150 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 151 + (numsrc) * sizeof(__u32)) 152 153struct group_req { 154 __u32 gr_interface; /* interface index */ 155 struct __kernel_sockaddr_storage gr_group; /* group address */ 156}; 157 158struct group_source_req { 159 __u32 gsr_interface; /* interface index */ 160 struct __kernel_sockaddr_storage gsr_group; /* group address */ 161 struct __kernel_sockaddr_storage gsr_source; /* source address */ 162}; 163 164struct group_filter { 165 __u32 gf_interface; /* interface index */ 166 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 167 __u32 gf_fmode; /* filter mode */ 168 __u32 gf_numsrc; /* number of sources */ 169 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 170}; 171 172#define GROUP_FILTER_SIZE(numsrc) \ 173 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 174 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 175 176struct in_pktinfo { 177 int ipi_ifindex; 178 struct in_addr ipi_spec_dst; 179 struct in_addr ipi_addr; 180}; 181 182/* Structure describing an Internet (IP) socket address. */ 183#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 184struct sockaddr_in { 185 sa_family_t sin_family; /* Address family */ 186 __be16 sin_port; /* Port number */ 187 struct in_addr sin_addr; /* Internet address */ 188 189 /* Pad to size of `struct sockaddr'. */ 190 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 191 sizeof(unsigned short int) - sizeof(struct in_addr)]; 192}; 193#define sin_zero __pad /* for BSD UNIX comp. -FvK */ 194 195 196/* 197 * Definitions of the bits in an Internet address integer. 198 * On subnets, host and network parts are found according 199 * to the subnet mask, not these masks. 200 */ 201#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 202#define IN_CLASSA_NET 0xff000000 203#define IN_CLASSA_NSHIFT 24 204#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 205#define IN_CLASSA_MAX 128 206 207#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 208#define IN_CLASSB_NET 0xffff0000 209#define IN_CLASSB_NSHIFT 16 210#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 211#define IN_CLASSB_MAX 65536 212 213#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 214#define IN_CLASSC_NET 0xffffff00 215#define IN_CLASSC_NSHIFT 8 216#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 217 218#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 219#define IN_MULTICAST(a) IN_CLASSD(a) 220#define IN_MULTICAST_NET 0xF0000000 221 222#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 223#define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) 224 225/* Address to accept any incoming messages. */ 226#define INADDR_ANY ((unsigned long int) 0x00000000) 227 228/* Address to send to all hosts. */ 229#define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 230 231/* Address indicating an error return. */ 232#define INADDR_NONE ((unsigned long int) 0xffffffff) 233 234/* Network number for local host loopback. */ 235#define IN_LOOPBACKNET 127 236 237/* Address to loopback in software to local host. */ 238#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 239#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 240 241/* Defines for Multicast INADDR */ 242#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 243#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 244#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 245#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 246 247 248/* <asm/byteorder.h> contains the htonl type stuff.. */ 249#include <asm/byteorder.h> 250 251 252#endif /* _LINUX_IN_H */ 253