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 of the Internet Protocol. 8 * 9 * Version: @(#)in.h 1.0.1 04/21/93 10 * 11 * Authors: Original taken from the GNU Project <netinet/in.h> file. 12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License 16 * as published by the Free Software Foundation; either version 17 * 2 of the License, or (at your option) any later version. 18 */ 19 #ifndef _UAPI_LINUX_IN_H 20 #define _UAPI_LINUX_IN_H 21 22 #include <linux/types.h> 23 #include <linux/libc-compat.h> 24 #include <linux/socket.h> 25 26 #if __UAPI_DEF_IN_IPPROTO 27 /* Standard well-defined IP protocols. */ 28 enum { 29 IPPROTO_IP = 0, /* Dummy protocol for TCP */ 30 #define IPPROTO_IP IPPROTO_IP 31 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ 32 #define IPPROTO_ICMP IPPROTO_ICMP 33 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */ 34 #define IPPROTO_IGMP IPPROTO_IGMP 35 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ 36 #define IPPROTO_IPIP IPPROTO_IPIP 37 IPPROTO_TCP = 6, /* Transmission Control Protocol */ 38 #define IPPROTO_TCP IPPROTO_TCP 39 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ 40 #define IPPROTO_EGP IPPROTO_EGP 41 IPPROTO_PUP = 12, /* PUP protocol */ 42 #define IPPROTO_PUP IPPROTO_PUP 43 IPPROTO_UDP = 17, /* User Datagram Protocol */ 44 #define IPPROTO_UDP IPPROTO_UDP 45 IPPROTO_IDP = 22, /* XNS IDP protocol */ 46 #define IPPROTO_IDP IPPROTO_IDP 47 IPPROTO_TP = 29, /* SO Transport Protocol Class 4 */ 48 #define IPPROTO_TP IPPROTO_TP 49 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ 50 #define IPPROTO_DCCP IPPROTO_DCCP 51 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ 52 #define IPPROTO_IPV6 IPPROTO_IPV6 53 IPPROTO_RSVP = 46, /* RSVP Protocol */ 54 #define IPPROTO_RSVP IPPROTO_RSVP 55 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ 56 #define IPPROTO_GRE IPPROTO_GRE 57 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ 58 #define IPPROTO_ESP IPPROTO_ESP 59 IPPROTO_AH = 51, /* Authentication Header protocol */ 60 #define IPPROTO_AH IPPROTO_AH 61 IPPROTO_MTP = 92, /* Multicast Transport Protocol */ 62 #define IPPROTO_MTP IPPROTO_MTP 63 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */ 64 #define IPPROTO_BEETPH IPPROTO_BEETPH 65 IPPROTO_ENCAP = 98, /* Encapsulation Header */ 66 #define IPPROTO_ENCAP IPPROTO_ENCAP 67 IPPROTO_PIM = 103, /* Protocol Independent Multicast */ 68 #define IPPROTO_PIM IPPROTO_PIM 69 IPPROTO_COMP = 108, /* Compression Header Protocol */ 70 #define IPPROTO_COMP IPPROTO_COMP 71 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ 72 #define IPPROTO_SCTP IPPROTO_SCTP 73 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */ 74 #define IPPROTO_UDPLITE IPPROTO_UDPLITE 75 IPPROTO_MPLS = 137, /* MPLS in IP (RFC 4023) */ 76 #define IPPROTO_MPLS IPPROTO_MPLS 77 IPPROTO_RAW = 255, /* Raw IP packets */ 78 #define IPPROTO_RAW IPPROTO_RAW 79 IPPROTO_MAX 80 }; 81 #endif 82 83 #if __UAPI_DEF_IN_ADDR 84 /* Internet address. */ 85 struct in_addr { 86 __be32 s_addr; 87 }; 88 #endif 89 90 #define IP_TOS 1 91 #define IP_TTL 2 92 #define IP_HDRINCL 3 93 #define IP_OPTIONS 4 94 #define IP_ROUTER_ALERT 5 95 #define IP_RECVOPTS 6 96 #define IP_RETOPTS 7 97 #define IP_PKTINFO 8 98 #define IP_PKTOPTIONS 9 99 #define IP_MTU_DISCOVER 10 100 #define IP_RECVERR 11 101 #define IP_RECVTTL 12 102 #define IP_RECVTOS 13 103 #define IP_MTU 14 104 #define IP_FREEBIND 15 105 #define IP_IPSEC_POLICY 16 106 #define IP_XFRM_POLICY 17 107 #define IP_PASSSEC 18 108 #define IP_TRANSPARENT 19 109 110 /* BSD compatibility */ 111 #define IP_RECVRETOPTS IP_RETOPTS 112 113 /* TProxy original addresses */ 114 #define IP_ORIGDSTADDR 20 115 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR 116 117 #define IP_MINTTL 21 118 #define IP_NODEFRAG 22 119 #define IP_CHECKSUM 23 120 #define IP_BIND_ADDRESS_NO_PORT 24 121 #define IP_RECVFRAGSIZE 25 122 123 /* IP_MTU_DISCOVER values */ 124 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 125 #define IP_PMTUDISC_WANT 1 /* Use per route hints */ 126 #define IP_PMTUDISC_DO 2 /* Always DF */ 127 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ 128 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag. 129 * Also incoming ICMP frag_needed notifications will be ignored on 130 * this socket to prevent accepting spoofed ones. 131 */ 132 #define IP_PMTUDISC_INTERFACE 4 133 /* weaker version of IP_PMTUDISC_INTERFACE, which allos packets to get 134 * fragmented if they exeed the interface mtu 135 */ 136 #define IP_PMTUDISC_OMIT 5 137 138 #define IP_MULTICAST_IF 32 139 #define IP_MULTICAST_TTL 33 140 #define IP_MULTICAST_LOOP 34 141 #define IP_ADD_MEMBERSHIP 35 142 #define IP_DROP_MEMBERSHIP 36 143 #define IP_UNBLOCK_SOURCE 37 144 #define IP_BLOCK_SOURCE 38 145 #define IP_ADD_SOURCE_MEMBERSHIP 39 146 #define IP_DROP_SOURCE_MEMBERSHIP 40 147 #define IP_MSFILTER 41 148 #define MCAST_JOIN_GROUP 42 149 #define MCAST_BLOCK_SOURCE 43 150 #define MCAST_UNBLOCK_SOURCE 44 151 #define MCAST_LEAVE_GROUP 45 152 #define MCAST_JOIN_SOURCE_GROUP 46 153 #define MCAST_LEAVE_SOURCE_GROUP 47 154 #define MCAST_MSFILTER 48 155 #define IP_MULTICAST_ALL 49 156 #define IP_UNICAST_IF 50 157 158 #define MCAST_EXCLUDE 0 159 #define MCAST_INCLUDE 1 160 161 /* These need to appear somewhere around here */ 162 #define IP_DEFAULT_MULTICAST_TTL 1 163 #define IP_DEFAULT_MULTICAST_LOOP 1 164 165 /* Request struct for multicast socket ops */ 166 167 #if __UAPI_DEF_IP_MREQ 168 struct ip_mreq { 169 struct in_addr imr_multiaddr; /* IP multicast address of group */ 170 struct in_addr imr_interface; /* local IP address of interface */ 171 }; 172 173 struct ip_mreqn { 174 struct in_addr imr_multiaddr; /* IP multicast address of group */ 175 struct in_addr imr_address; /* local IP address of interface */ 176 int imr_ifindex; /* Interface index */ 177 }; 178 179 struct ip_mreq_source { 180 __be32 imr_multiaddr; 181 __be32 imr_interface; 182 __be32 imr_sourceaddr; 183 }; 184 185 struct ip_msfilter { 186 __be32 imsf_multiaddr; 187 __be32 imsf_interface; 188 __u32 imsf_fmode; 189 __u32 imsf_numsrc; 190 __be32 imsf_slist[1]; 191 }; 192 193 #define IP_MSFILTER_SIZE(numsrc) \ 194 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 195 + (numsrc) * sizeof(__u32)) 196 197 struct group_req { 198 __u32 gr_interface; /* interface index */ 199 struct __kernel_sockaddr_storage gr_group; /* group address */ 200 }; 201 202 struct group_source_req { 203 __u32 gsr_interface; /* interface index */ 204 struct __kernel_sockaddr_storage gsr_group; /* group address */ 205 struct __kernel_sockaddr_storage gsr_source; /* source address */ 206 }; 207 208 struct group_filter { 209 __u32 gf_interface; /* interface index */ 210 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 211 __u32 gf_fmode; /* filter mode */ 212 __u32 gf_numsrc; /* number of sources */ 213 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 214 }; 215 216 #define GROUP_FILTER_SIZE(numsrc) \ 217 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 218 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 219 #endif 220 221 #if __UAPI_DEF_IN_PKTINFO 222 struct in_pktinfo { 223 int ipi_ifindex; 224 struct in_addr ipi_spec_dst; 225 struct in_addr ipi_addr; 226 }; 227 #endif 228 229 /* Structure describing an Internet (IP) socket address. */ 230 #if __UAPI_DEF_SOCKADDR_IN 231 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 232 struct sockaddr_in { 233 __kernel_sa_family_t sin_family; /* Address family */ 234 __be16 sin_port; /* Port number */ 235 struct in_addr sin_addr; /* Internet address */ 236 237 /* Pad to size of `struct sockaddr'. */ 238 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 239 sizeof(unsigned short int) - sizeof(struct in_addr)]; 240 }; 241 #define sin_zero __pad /* for BSD UNIX comp. -FvK */ 242 #endif 243 244 #if __UAPI_DEF_IN_CLASS 245 /* 246 * Definitions of the bits in an Internet address integer. 247 * On subnets, host and network parts are found according 248 * to the subnet mask, not these masks. 249 */ 250 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 251 #define IN_CLASSA_NET 0xff000000 252 #define IN_CLASSA_NSHIFT 24 253 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 254 #define IN_CLASSA_MAX 128 255 256 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 257 #define IN_CLASSB_NET 0xffff0000 258 #define IN_CLASSB_NSHIFT 16 259 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 260 #define IN_CLASSB_MAX 65536 261 262 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 263 #define IN_CLASSC_NET 0xffffff00 264 #define IN_CLASSC_NSHIFT 8 265 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 266 267 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 268 #define IN_MULTICAST(a) IN_CLASSD(a) 269 #define IN_MULTICAST_NET 0xe0000000 270 271 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff) 272 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a)) 273 274 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 275 #define IN_CLASSE_NET 0xffffffff 276 #define IN_CLASSE_NSHIFT 0 277 278 /* Address to accept any incoming messages. */ 279 #define INADDR_ANY ((unsigned long int) 0x00000000) 280 281 /* Address to send to all hosts. */ 282 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 283 284 /* Address indicating an error return. */ 285 #define INADDR_NONE ((unsigned long int) 0xffffffff) 286 287 /* Network number for local host loopback. */ 288 #define IN_LOOPBACKNET 127 289 290 /* Address to loopback in software to local host. */ 291 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 292 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 293 294 /* Defines for Multicast INADDR */ 295 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 296 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 297 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 298 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 299 #endif 300 301 /* <asm/byteorder.h> contains the htonl type stuff.. */ 302 #include <asm/byteorder.h> 303 304 305 #endif /* _UAPI_LINUX_IN_H */ 306