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, <[email protected]> 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/stddef.h> 24 #include <linux/libc-compat.h> 25 #include <linux/socket.h> 26 27 #if __UAPI_DEF_IN_IPPROTO 28 /* Standard well-defined IP protocols. */ 29 enum { 30 IPPROTO_IP = 0, /* Dummy protocol for TCP */ 31 #define IPPROTO_IP IPPROTO_IP 32 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ 33 #define IPPROTO_ICMP IPPROTO_ICMP 34 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */ 35 #define IPPROTO_IGMP IPPROTO_IGMP 36 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ 37 #define IPPROTO_IPIP IPPROTO_IPIP 38 IPPROTO_TCP = 6, /* Transmission Control Protocol */ 39 #define IPPROTO_TCP IPPROTO_TCP 40 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ 41 #define IPPROTO_EGP IPPROTO_EGP 42 IPPROTO_PUP = 12, /* PUP protocol */ 43 #define IPPROTO_PUP IPPROTO_PUP 44 IPPROTO_UDP = 17, /* User Datagram Protocol */ 45 #define IPPROTO_UDP IPPROTO_UDP 46 IPPROTO_IDP = 22, /* XNS IDP protocol */ 47 #define IPPROTO_IDP IPPROTO_IDP 48 IPPROTO_TP = 29, /* SO Transport Protocol Class 4 */ 49 #define IPPROTO_TP IPPROTO_TP 50 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ 51 #define IPPROTO_DCCP IPPROTO_DCCP 52 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ 53 #define IPPROTO_IPV6 IPPROTO_IPV6 54 IPPROTO_RSVP = 46, /* RSVP Protocol */ 55 #define IPPROTO_RSVP IPPROTO_RSVP 56 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ 57 #define IPPROTO_GRE IPPROTO_GRE 58 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ 59 #define IPPROTO_ESP IPPROTO_ESP 60 IPPROTO_AH = 51, /* Authentication Header protocol */ 61 #define IPPROTO_AH IPPROTO_AH 62 IPPROTO_MTP = 92, /* Multicast Transport Protocol */ 63 #define IPPROTO_MTP IPPROTO_MTP 64 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */ 65 #define IPPROTO_BEETPH IPPROTO_BEETPH 66 IPPROTO_ENCAP = 98, /* Encapsulation Header */ 67 #define IPPROTO_ENCAP IPPROTO_ENCAP 68 IPPROTO_PIM = 103, /* Protocol Independent Multicast */ 69 #define IPPROTO_PIM IPPROTO_PIM 70 IPPROTO_COMP = 108, /* Compression Header Protocol */ 71 #define IPPROTO_COMP IPPROTO_COMP 72 IPPROTO_L2TP = 115, /* Layer 2 Tunnelling Protocol */ 73 #define IPPROTO_L2TP IPPROTO_L2TP 74 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ 75 #define IPPROTO_SCTP IPPROTO_SCTP 76 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */ 77 #define IPPROTO_UDPLITE IPPROTO_UDPLITE 78 IPPROTO_MPLS = 137, /* MPLS in IP (RFC 4023) */ 79 #define IPPROTO_MPLS IPPROTO_MPLS 80 IPPROTO_ETHERNET = 143, /* Ethernet-within-IPv6 Encapsulation */ 81 #define IPPROTO_ETHERNET IPPROTO_ETHERNET 82 IPPROTO_AGGFRAG = 144, /* AGGFRAG in ESP (RFC 9347) */ 83 #define IPPROTO_AGGFRAG IPPROTO_AGGFRAG 84 IPPROTO_RAW = 255, /* Raw IP packets */ 85 #define IPPROTO_RAW IPPROTO_RAW 86 IPPROTO_SMC = 256, /* Shared Memory Communications */ 87 #define IPPROTO_SMC IPPROTO_SMC 88 IPPROTO_MPTCP = 262, /* Multipath TCP connection */ 89 #define IPPROTO_MPTCP IPPROTO_MPTCP 90 IPPROTO_MAX 91 }; 92 #endif 93 94 #if __UAPI_DEF_IN_ADDR 95 /* Internet address. */ 96 struct in_addr { 97 __be32 s_addr; 98 }; 99 #endif 100 101 #define IP_TOS 1 102 #define IP_TTL 2 103 #define IP_HDRINCL 3 104 #define IP_OPTIONS 4 105 #define IP_ROUTER_ALERT 5 106 #define IP_RECVOPTS 6 107 #define IP_RETOPTS 7 108 #define IP_PKTINFO 8 109 #define IP_PKTOPTIONS 9 110 #define IP_MTU_DISCOVER 10 111 #define IP_RECVERR 11 112 #define IP_RECVTTL 12 113 #define IP_RECVTOS 13 114 #define IP_MTU 14 115 #define IP_FREEBIND 15 116 #define IP_IPSEC_POLICY 16 117 #define IP_XFRM_POLICY 17 118 #define IP_PASSSEC 18 119 #define IP_TRANSPARENT 19 120 121 /* BSD compatibility */ 122 #define IP_RECVRETOPTS IP_RETOPTS 123 124 /* TProxy original addresses */ 125 #define IP_ORIGDSTADDR 20 126 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR 127 128 #define IP_MINTTL 21 129 #define IP_NODEFRAG 22 130 #define IP_CHECKSUM 23 131 #define IP_BIND_ADDRESS_NO_PORT 24 132 #define IP_RECVFRAGSIZE 25 133 #define IP_RECVERR_RFC4884 26 134 135 /* IP_MTU_DISCOVER values */ 136 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 137 #define IP_PMTUDISC_WANT 1 /* Use per route hints */ 138 #define IP_PMTUDISC_DO 2 /* Always DF */ 139 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ 140 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag. 141 * Also incoming ICMP frag_needed notifications will be ignored on 142 * this socket to prevent accepting spoofed ones. 143 */ 144 #define IP_PMTUDISC_INTERFACE 4 145 /* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get 146 * fragmented if they exceed the interface mtu 147 */ 148 #define IP_PMTUDISC_OMIT 5 149 150 #define IP_MULTICAST_IF 32 151 #define IP_MULTICAST_TTL 33 152 #define IP_MULTICAST_LOOP 34 153 #define IP_ADD_MEMBERSHIP 35 154 #define IP_DROP_MEMBERSHIP 36 155 #define IP_UNBLOCK_SOURCE 37 156 #define IP_BLOCK_SOURCE 38 157 #define IP_ADD_SOURCE_MEMBERSHIP 39 158 #define IP_DROP_SOURCE_MEMBERSHIP 40 159 #define IP_MSFILTER 41 160 #define MCAST_JOIN_GROUP 42 161 #define MCAST_BLOCK_SOURCE 43 162 #define MCAST_UNBLOCK_SOURCE 44 163 #define MCAST_LEAVE_GROUP 45 164 #define MCAST_JOIN_SOURCE_GROUP 46 165 #define MCAST_LEAVE_SOURCE_GROUP 47 166 #define MCAST_MSFILTER 48 167 #define IP_MULTICAST_ALL 49 168 #define IP_UNICAST_IF 50 169 #define IP_LOCAL_PORT_RANGE 51 170 #define IP_PROTOCOL 52 171 172 #define MCAST_EXCLUDE 0 173 #define MCAST_INCLUDE 1 174 175 /* These need to appear somewhere around here */ 176 #define IP_DEFAULT_MULTICAST_TTL 1 177 #define IP_DEFAULT_MULTICAST_LOOP 1 178 179 /* Request struct for multicast socket ops */ 180 181 #if __UAPI_DEF_IP_MREQ 182 struct ip_mreq { 183 struct in_addr imr_multiaddr; /* IP multicast address of group */ 184 struct in_addr imr_interface; /* local IP address of interface */ 185 }; 186 187 struct ip_mreqn { 188 struct in_addr imr_multiaddr; /* IP multicast address of group */ 189 struct in_addr imr_address; /* local IP address of interface */ 190 int imr_ifindex; /* Interface index */ 191 }; 192 193 struct ip_mreq_source { 194 __be32 imr_multiaddr; 195 __be32 imr_interface; 196 __be32 imr_sourceaddr; 197 }; 198 199 struct ip_msfilter { 200 __be32 imsf_multiaddr; 201 __be32 imsf_interface; 202 __u32 imsf_fmode; 203 __u32 imsf_numsrc; 204 union { 205 __be32 imsf_slist[1]; 206 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex); 207 }; 208 }; 209 210 #define IP_MSFILTER_SIZE(numsrc) \ 211 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 212 + (numsrc) * sizeof(__u32)) 213 214 struct group_req { 215 __u32 gr_interface; /* interface index */ 216 struct __kernel_sockaddr_storage gr_group; /* group address */ 217 }; 218 219 struct group_source_req { 220 __u32 gsr_interface; /* interface index */ 221 struct __kernel_sockaddr_storage gsr_group; /* group address */ 222 struct __kernel_sockaddr_storage gsr_source; /* source address */ 223 }; 224 225 struct group_filter { 226 union { 227 struct { 228 __u32 gf_interface_aux; /* interface index */ 229 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */ 230 __u32 gf_fmode_aux; /* filter mode */ 231 __u32 gf_numsrc_aux; /* number of sources */ 232 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 233 }; 234 struct { 235 __u32 gf_interface; /* interface index */ 236 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 237 __u32 gf_fmode; /* filter mode */ 238 __u32 gf_numsrc; /* number of sources */ 239 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */ 240 }; 241 }; 242 }; 243 244 #define GROUP_FILTER_SIZE(numsrc) \ 245 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 246 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 247 #endif 248 249 #if __UAPI_DEF_IN_PKTINFO 250 struct in_pktinfo { 251 int ipi_ifindex; 252 struct in_addr ipi_spec_dst; 253 struct in_addr ipi_addr; 254 }; 255 #endif 256 257 /* Structure describing an Internet (IP) socket address. */ 258 #if __UAPI_DEF_SOCKADDR_IN 259 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 260 struct sockaddr_in { 261 __kernel_sa_family_t sin_family; /* Address family */ 262 __be16 sin_port; /* Port number */ 263 struct in_addr sin_addr; /* Internet address */ 264 265 /* Pad to size of `struct sockaddr'. */ 266 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 267 sizeof(unsigned short int) - sizeof(struct in_addr)]; 268 }; 269 #define sin_zero __pad /* for BSD UNIX comp. -FvK */ 270 #endif 271 272 #if __UAPI_DEF_IN_CLASS 273 /* 274 * Definitions of the bits in an Internet address integer. 275 * On subnets, host and network parts are found according 276 * to the subnet mask, not these masks. 277 */ 278 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 279 #define IN_CLASSA_NET 0xff000000 280 #define IN_CLASSA_NSHIFT 24 281 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 282 #define IN_CLASSA_MAX 128 283 284 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 285 #define IN_CLASSB_NET 0xffff0000 286 #define IN_CLASSB_NSHIFT 16 287 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 288 #define IN_CLASSB_MAX 65536 289 290 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 291 #define IN_CLASSC_NET 0xffffff00 292 #define IN_CLASSC_NSHIFT 8 293 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 294 295 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 296 #define IN_MULTICAST(a) IN_CLASSD(a) 297 #define IN_MULTICAST_NET 0xe0000000 298 299 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff) 300 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a)) 301 302 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 303 #define IN_CLASSE_NET 0xffffffff 304 #define IN_CLASSE_NSHIFT 0 305 306 /* Address to accept any incoming messages. */ 307 #define INADDR_ANY ((unsigned long int) 0x00000000) 308 309 /* Address to send to all hosts. */ 310 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 311 312 /* Address indicating an error return. */ 313 #define INADDR_NONE ((unsigned long int) 0xffffffff) 314 315 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */ 316 #define INADDR_DUMMY ((unsigned long int) 0xc0000008) 317 318 /* Network number for local host loopback. */ 319 #define IN_LOOPBACKNET 127 320 321 /* Address to loopback in software to local host. */ 322 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 323 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 324 325 /* Defines for Multicast INADDR */ 326 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 327 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 328 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 329 #define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */ 330 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 331 #endif 332 333 /* <asm/byteorder.h> contains the htonl type stuff.. */ 334 #include <asm/byteorder.h> 335 336 337 #endif /* _UAPI_LINUX_IN_H */ 338