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_PIM = 103, /* Protocol Independent Multicast */ 44 45 IPPROTO_COMP = 108, /* Compression Header protocol */ 46 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ 47 48 IPPROTO_RAW = 255, /* Raw IP packets */ 49 IPPROTO_MAX 50}; 51 52 53/* Internet address. */ 54struct in_addr { 55 __u32 s_addr; 56}; 57 58#define IP_TOS 1 59#define IP_TTL 2 60#define IP_HDRINCL 3 61#define IP_OPTIONS 4 62#define IP_ROUTER_ALERT 5 63#define IP_RECVOPTS 6 64#define IP_RETOPTS 7 65#define IP_PKTINFO 8 66#define IP_PKTOPTIONS 9 67#define IP_MTU_DISCOVER 10 68#define IP_RECVERR 11 69#define IP_RECVTTL 12 70#define IP_RECVTOS 13 71#define IP_MTU 14 72#define IP_FREEBIND 15 73#define IP_IPSEC_POLICY 16 74#define IP_XFRM_POLICY 17 75#define IP_PASSSEC 18 76 77/* BSD compatibility */ 78#define IP_RECVRETOPTS IP_RETOPTS 79 80/* IP_MTU_DISCOVER values */ 81#define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 82#define IP_PMTUDISC_WANT 1 /* Use per route hints */ 83#define IP_PMTUDISC_DO 2 /* Always DF */ 84 85#define IP_MULTICAST_IF 32 86#define IP_MULTICAST_TTL 33 87#define IP_MULTICAST_LOOP 34 88#define IP_ADD_MEMBERSHIP 35 89#define IP_DROP_MEMBERSHIP 36 90#define IP_UNBLOCK_SOURCE 37 91#define IP_BLOCK_SOURCE 38 92#define IP_ADD_SOURCE_MEMBERSHIP 39 93#define IP_DROP_SOURCE_MEMBERSHIP 40 94#define IP_MSFILTER 41 95#define MCAST_JOIN_GROUP 42 96#define MCAST_BLOCK_SOURCE 43 97#define MCAST_UNBLOCK_SOURCE 44 98#define MCAST_LEAVE_GROUP 45 99#define MCAST_JOIN_SOURCE_GROUP 46 100#define MCAST_LEAVE_SOURCE_GROUP 47 101#define MCAST_MSFILTER 48 102 103#define MCAST_EXCLUDE 0 104#define MCAST_INCLUDE 1 105 106/* These need to appear somewhere around here */ 107#define IP_DEFAULT_MULTICAST_TTL 1 108#define IP_DEFAULT_MULTICAST_LOOP 1 109 110/* Request struct for multicast socket ops */ 111 112struct ip_mreq 113{ 114 struct in_addr imr_multiaddr; /* IP multicast address of group */ 115 struct in_addr imr_interface; /* local IP address of interface */ 116}; 117 118struct ip_mreqn 119{ 120 struct in_addr imr_multiaddr; /* IP multicast address of group */ 121 struct in_addr imr_address; /* local IP address of interface */ 122 int imr_ifindex; /* Interface index */ 123}; 124 125struct ip_mreq_source { 126 __u32 imr_multiaddr; 127 __u32 imr_interface; 128 __u32 imr_sourceaddr; 129}; 130 131struct ip_msfilter { 132 __u32 imsf_multiaddr; 133 __u32 imsf_interface; 134 __u32 imsf_fmode; 135 __u32 imsf_numsrc; 136 __u32 imsf_slist[1]; 137}; 138 139#define IP_MSFILTER_SIZE(numsrc) \ 140 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 141 + (numsrc) * sizeof(__u32)) 142 143struct group_req 144{ 145 __u32 gr_interface; /* interface index */ 146 struct __kernel_sockaddr_storage gr_group; /* group address */ 147}; 148 149struct group_source_req 150{ 151 __u32 gsr_interface; /* interface index */ 152 struct __kernel_sockaddr_storage gsr_group; /* group address */ 153 struct __kernel_sockaddr_storage gsr_source; /* source address */ 154}; 155 156struct group_filter 157{ 158 __u32 gf_interface; /* interface index */ 159 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 160 __u32 gf_fmode; /* filter mode */ 161 __u32 gf_numsrc; /* number of sources */ 162 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 163}; 164 165#define GROUP_FILTER_SIZE(numsrc) \ 166 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 167 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 168 169struct in_pktinfo 170{ 171 int ipi_ifindex; 172 struct in_addr ipi_spec_dst; 173 struct in_addr ipi_addr; 174}; 175 176/* Structure describing an Internet (IP) socket address. */ 177#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 178struct sockaddr_in { 179 sa_family_t sin_family; /* Address family */ 180 unsigned short int sin_port; /* Port number */ 181 struct in_addr sin_addr; /* Internet address */ 182 183 /* Pad to size of `struct sockaddr'. */ 184 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 185 sizeof(unsigned short int) - sizeof(struct in_addr)]; 186}; 187#define sin_zero __pad /* for BSD UNIX comp. -FvK */ 188 189 190/* 191 * Definitions of the bits in an Internet address integer. 192 * On subnets, host and network parts are found according 193 * to the subnet mask, not these masks. 194 */ 195#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 196#define IN_CLASSA_NET 0xff000000 197#define IN_CLASSA_NSHIFT 24 198#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 199#define IN_CLASSA_MAX 128 200 201#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 202#define IN_CLASSB_NET 0xffff0000 203#define IN_CLASSB_NSHIFT 16 204#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 205#define IN_CLASSB_MAX 65536 206 207#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 208#define IN_CLASSC_NET 0xffffff00 209#define IN_CLASSC_NSHIFT 8 210#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 211 212#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 213#define IN_MULTICAST(a) IN_CLASSD(a) 214#define IN_MULTICAST_NET 0xF0000000 215 216#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 217#define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) 218 219/* Address to accept any incoming messages. */ 220#define INADDR_ANY ((unsigned long int) 0x00000000) 221 222/* Address to send to all hosts. */ 223#define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 224 225/* Address indicating an error return. */ 226#define INADDR_NONE ((unsigned long int) 0xffffffff) 227 228/* Network number for local host loopback. */ 229#define IN_LOOPBACKNET 127 230 231/* Address to loopback in software to local host. */ 232#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 233#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 234 235/* Defines for Multicast INADDR */ 236#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 237#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 238#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 239#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 240 241 242/* <asm/byteorder.h> contains the htonl type stuff.. */ 243#include <asm/byteorder.h> 244 245#ifdef __KERNEL__ 246/* Some random defines to make it easier in the kernel.. */ 247#define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000)) 248#define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000)) 249#define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000)) 250#define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000)) 251#define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000)) 252 253#endif 254 255#endif /* _LINUX_IN_H */ 256