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. */ 25 enum { 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_RSVP = 46, /* RSVP protocol */ 36 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ 37 38 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ 39 40 IPPROTO_PIM = 103, /* Protocol Independent Multicast */ 41 42 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ 43 IPPROTO_AH = 51, /* Authentication Header protocol */ 44 IPPROTO_COMP = 108, /* Compression Header protocol */ 45 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ 46 47 IPPROTO_RAW = 255, /* Raw IP packets */ 48 IPPROTO_MAX 49 }; 50 51 52 /* Internet address. */ 53 struct in_addr { 54 __u32 s_addr; 55 }; 56 57 #define IP_TOS 1 58 #define IP_TTL 2 59 #define IP_HDRINCL 3 60 #define IP_OPTIONS 4 61 #define IP_ROUTER_ALERT 5 62 #define IP_RECVOPTS 6 63 #define IP_RETOPTS 7 64 #define IP_PKTINFO 8 65 #define IP_PKTOPTIONS 9 66 #define IP_MTU_DISCOVER 10 67 #define IP_RECVERR 11 68 #define IP_RECVTTL 12 69 #define IP_RECVTOS 13 70 #define IP_MTU 14 71 #define IP_FREEBIND 15 72 73 /* BSD compatibility */ 74 #define IP_RECVRETOPTS IP_RETOPTS 75 76 /* IP_MTU_DISCOVER values */ 77 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 78 #define IP_PMTUDISC_WANT 1 /* Use per route hints */ 79 #define IP_PMTUDISC_DO 2 /* Always DF */ 80 81 #define IP_MULTICAST_IF 32 82 #define IP_MULTICAST_TTL 33 83 #define IP_MULTICAST_LOOP 34 84 #define IP_ADD_MEMBERSHIP 35 85 #define IP_DROP_MEMBERSHIP 36 86 #define IP_UNBLOCK_SOURCE 37 87 #define IP_BLOCK_SOURCE 38 88 #define IP_ADD_SOURCE_MEMBERSHIP 39 89 #define IP_DROP_SOURCE_MEMBERSHIP 40 90 #define IP_MSFILTER 41 91 #define MCAST_JOIN_GROUP 42 92 #define MCAST_BLOCK_SOURCE 43 93 #define MCAST_UNBLOCK_SOURCE 44 94 #define MCAST_LEAVE_GROUP 45 95 #define MCAST_JOIN_SOURCE_GROUP 46 96 #define MCAST_LEAVE_SOURCE_GROUP 47 97 #define MCAST_MSFILTER 48 98 99 #define MCAST_EXCLUDE 0 100 #define MCAST_INCLUDE 1 101 102 /* These need to appear somewhere around here */ 103 #define IP_DEFAULT_MULTICAST_TTL 1 104 #define IP_DEFAULT_MULTICAST_LOOP 1 105 106 /* Request struct for multicast socket ops */ 107 108 struct ip_mreq 109 { 110 struct in_addr imr_multiaddr; /* IP multicast address of group */ 111 struct in_addr imr_interface; /* local IP address of interface */ 112 }; 113 114 struct ip_mreqn 115 { 116 struct in_addr imr_multiaddr; /* IP multicast address of group */ 117 struct in_addr imr_address; /* local IP address of interface */ 118 int imr_ifindex; /* Interface index */ 119 }; 120 121 struct ip_mreq_source { 122 __u32 imr_multiaddr; 123 __u32 imr_interface; 124 __u32 imr_sourceaddr; 125 }; 126 127 struct ip_msfilter { 128 __u32 imsf_multiaddr; 129 __u32 imsf_interface; 130 __u32 imsf_fmode; 131 __u32 imsf_numsrc; 132 __u32 imsf_slist[1]; 133 }; 134 135 #define IP_MSFILTER_SIZE(numsrc) \ 136 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 137 + (numsrc) * sizeof(__u32)) 138 139 struct group_req 140 { 141 __u32 gr_interface; /* interface index */ 142 struct __kernel_sockaddr_storage gr_group; /* group address */ 143 }; 144 145 struct group_source_req 146 { 147 __u32 gsr_interface; /* interface index */ 148 struct __kernel_sockaddr_storage gsr_group; /* group address */ 149 struct __kernel_sockaddr_storage gsr_source; /* source address */ 150 }; 151 152 struct group_filter 153 { 154 __u32 gf_interface; /* interface index */ 155 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 156 __u32 gf_fmode; /* filter mode */ 157 __u32 gf_numsrc; /* number of sources */ 158 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 159 }; 160 161 #define GROUP_FILTER_SIZE(numsrc) \ 162 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 163 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 164 165 struct in_pktinfo 166 { 167 int ipi_ifindex; 168 struct in_addr ipi_spec_dst; 169 struct in_addr ipi_addr; 170 }; 171 172 /* Structure describing an Internet (IP) socket address. */ 173 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 174 struct sockaddr_in { 175 sa_family_t sin_family; /* Address family */ 176 unsigned short int sin_port; /* Port number */ 177 struct in_addr sin_addr; /* Internet address */ 178 179 /* Pad to size of `struct sockaddr'. */ 180 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 181 sizeof(unsigned short int) - sizeof(struct in_addr)]; 182 }; 183 #define sin_zero __pad /* for BSD UNIX comp. -FvK */ 184 185 186 /* 187 * Definitions of the bits in an Internet address integer. 188 * On subnets, host and network parts are found according 189 * to the subnet mask, not these masks. 190 */ 191 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 192 #define IN_CLASSA_NET 0xff000000 193 #define IN_CLASSA_NSHIFT 24 194 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 195 #define IN_CLASSA_MAX 128 196 197 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 198 #define IN_CLASSB_NET 0xffff0000 199 #define IN_CLASSB_NSHIFT 16 200 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 201 #define IN_CLASSB_MAX 65536 202 203 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 204 #define IN_CLASSC_NET 0xffffff00 205 #define IN_CLASSC_NSHIFT 8 206 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 207 208 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 209 #define IN_MULTICAST(a) IN_CLASSD(a) 210 #define IN_MULTICAST_NET 0xF0000000 211 212 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 213 #define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) 214 215 /* Address to accept any incoming messages. */ 216 #define INADDR_ANY ((unsigned long int) 0x00000000) 217 218 /* Address to send to all hosts. */ 219 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 220 221 /* Address indicating an error return. */ 222 #define INADDR_NONE ((unsigned long int) 0xffffffff) 223 224 /* Network number for local host loopback. */ 225 #define IN_LOOPBACKNET 127 226 227 /* Address to loopback in software to local host. */ 228 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 229 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 230 231 /* Defines for Multicast INADDR */ 232 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 233 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 234 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 235 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 236 237 238 /* <asm/byteorder.h> contains the htonl type stuff.. */ 239 #include <asm/byteorder.h> 240 241 #ifdef __KERNEL__ 242 /* Some random defines to make it easier in the kernel.. */ 243 #define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000)) 244 #define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000)) 245 #define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000)) 246 #define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000)) 247 #define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000)) 248 249 #endif 250 251 #endif /* _LINUX_IN_H */ 252