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_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. */ 56 struct 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 79 /* BSD compatibility */ 80 #define IP_RECVRETOPTS IP_RETOPTS 81 82 /* IP_MTU_DISCOVER values */ 83 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 84 #define IP_PMTUDISC_WANT 1 /* Use per route hints */ 85 #define IP_PMTUDISC_DO 2 /* Always DF */ 86 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ 87 88 #define IP_MULTICAST_IF 32 89 #define IP_MULTICAST_TTL 33 90 #define IP_MULTICAST_LOOP 34 91 #define IP_ADD_MEMBERSHIP 35 92 #define IP_DROP_MEMBERSHIP 36 93 #define IP_UNBLOCK_SOURCE 37 94 #define IP_BLOCK_SOURCE 38 95 #define IP_ADD_SOURCE_MEMBERSHIP 39 96 #define IP_DROP_SOURCE_MEMBERSHIP 40 97 #define IP_MSFILTER 41 98 #define MCAST_JOIN_GROUP 42 99 #define MCAST_BLOCK_SOURCE 43 100 #define MCAST_UNBLOCK_SOURCE 44 101 #define MCAST_LEAVE_GROUP 45 102 #define MCAST_JOIN_SOURCE_GROUP 46 103 #define MCAST_LEAVE_SOURCE_GROUP 47 104 #define MCAST_MSFILTER 48 105 106 #define MCAST_EXCLUDE 0 107 #define MCAST_INCLUDE 1 108 109 /* These need to appear somewhere around here */ 110 #define IP_DEFAULT_MULTICAST_TTL 1 111 #define IP_DEFAULT_MULTICAST_LOOP 1 112 113 /* Request struct for multicast socket ops */ 114 115 struct ip_mreq 116 { 117 struct in_addr imr_multiaddr; /* IP multicast address of group */ 118 struct in_addr imr_interface; /* local IP address of interface */ 119 }; 120 121 struct ip_mreqn 122 { 123 struct in_addr imr_multiaddr; /* IP multicast address of group */ 124 struct in_addr imr_address; /* local IP address of interface */ 125 int imr_ifindex; /* Interface index */ 126 }; 127 128 struct ip_mreq_source { 129 __be32 imr_multiaddr; 130 __be32 imr_interface; 131 __be32 imr_sourceaddr; 132 }; 133 134 struct ip_msfilter { 135 __be32 imsf_multiaddr; 136 __be32 imsf_interface; 137 __u32 imsf_fmode; 138 __u32 imsf_numsrc; 139 __be32 imsf_slist[1]; 140 }; 141 142 #define IP_MSFILTER_SIZE(numsrc) \ 143 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 144 + (numsrc) * sizeof(__u32)) 145 146 struct group_req 147 { 148 __u32 gr_interface; /* interface index */ 149 struct __kernel_sockaddr_storage gr_group; /* group address */ 150 }; 151 152 struct group_source_req 153 { 154 __u32 gsr_interface; /* interface index */ 155 struct __kernel_sockaddr_storage gsr_group; /* group address */ 156 struct __kernel_sockaddr_storage gsr_source; /* source address */ 157 }; 158 159 struct group_filter 160 { 161 __u32 gf_interface; /* interface index */ 162 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 163 __u32 gf_fmode; /* filter mode */ 164 __u32 gf_numsrc; /* number of sources */ 165 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 166 }; 167 168 #define GROUP_FILTER_SIZE(numsrc) \ 169 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 170 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 171 172 struct in_pktinfo 173 { 174 int ipi_ifindex; 175 struct in_addr ipi_spec_dst; 176 struct in_addr ipi_addr; 177 }; 178 179 /* Structure describing an Internet (IP) socket address. */ 180 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 181 struct sockaddr_in { 182 sa_family_t sin_family; /* Address family */ 183 __be16 sin_port; /* Port number */ 184 struct in_addr sin_addr; /* Internet address */ 185 186 /* Pad to size of `struct sockaddr'. */ 187 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 188 sizeof(unsigned short int) - sizeof(struct in_addr)]; 189 }; 190 #define sin_zero __pad /* for BSD UNIX comp. -FvK */ 191 192 193 /* 194 * Definitions of the bits in an Internet address integer. 195 * On subnets, host and network parts are found according 196 * to the subnet mask, not these masks. 197 */ 198 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 199 #define IN_CLASSA_NET 0xff000000 200 #define IN_CLASSA_NSHIFT 24 201 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 202 #define IN_CLASSA_MAX 128 203 204 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 205 #define IN_CLASSB_NET 0xffff0000 206 #define IN_CLASSB_NSHIFT 16 207 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 208 #define IN_CLASSB_MAX 65536 209 210 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 211 #define IN_CLASSC_NET 0xffffff00 212 #define IN_CLASSC_NSHIFT 8 213 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 214 215 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 216 #define IN_MULTICAST(a) IN_CLASSD(a) 217 #define IN_MULTICAST_NET 0xF0000000 218 219 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 220 #define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) 221 222 /* Address to accept any incoming messages. */ 223 #define INADDR_ANY ((unsigned long int) 0x00000000) 224 225 /* Address to send to all hosts. */ 226 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 227 228 /* Address indicating an error return. */ 229 #define INADDR_NONE ((unsigned long int) 0xffffffff) 230 231 /* Network number for local host loopback. */ 232 #define IN_LOOPBACKNET 127 233 234 /* Address to loopback in software to local host. */ 235 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 236 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 237 238 /* Defines for Multicast INADDR */ 239 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 240 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 241 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 242 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 243 244 245 /* <asm/byteorder.h> contains the htonl type stuff.. */ 246 #include <asm/byteorder.h> 247 248 249 #endif /* _LINUX_IN_H */ 250