in.h (10955B) - Raw
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 _LINUX_IN_H 20 #define _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_RAW = 255, /* Raw IP packets */ 83 #define IPPROTO_RAW IPPROTO_RAW 84 IPPROTO_SMC = 256, /* Shared Memory Communications */ 85 #define IPPROTO_SMC IPPROTO_SMC 86 IPPROTO_MPTCP = 262, /* Multipath TCP connection */ 87 #define IPPROTO_MPTCP IPPROTO_MPTCP 88 IPPROTO_MAX 89 }; 90 #endif 91 92 #if __UAPI_DEF_IN_ADDR 93 /* Internet address. */ 94 struct in_addr { 95 __be32 s_addr; 96 }; 97 #endif 98 99 #define IP_TOS 1 100 #define IP_TTL 2 101 #define IP_HDRINCL 3 102 #define IP_OPTIONS 4 103 #define IP_ROUTER_ALERT 5 104 #define IP_RECVOPTS 6 105 #define IP_RETOPTS 7 106 #define IP_PKTINFO 8 107 #define IP_PKTOPTIONS 9 108 #define IP_MTU_DISCOVER 10 109 #define IP_RECVERR 11 110 #define IP_RECVTTL 12 111 #define IP_RECVTOS 13 112 #define IP_MTU 14 113 #define IP_FREEBIND 15 114 #define IP_IPSEC_POLICY 16 115 #define IP_XFRM_POLICY 17 116 #define IP_PASSSEC 18 117 #define IP_TRANSPARENT 19 118 119 /* BSD compatibility */ 120 #define IP_RECVRETOPTS IP_RETOPTS 121 122 /* TProxy original addresses */ 123 #define IP_ORIGDSTADDR 20 124 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR 125 126 #define IP_MINTTL 21 127 #define IP_NODEFRAG 22 128 #define IP_CHECKSUM 23 129 #define IP_BIND_ADDRESS_NO_PORT 24 130 #define IP_RECVFRAGSIZE 25 131 #define IP_RECVERR_RFC4884 26 132 133 /* IP_MTU_DISCOVER values */ 134 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ 135 #define IP_PMTUDISC_WANT 1 /* Use per route hints */ 136 #define IP_PMTUDISC_DO 2 /* Always DF */ 137 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ 138 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag. 139 * Also incoming ICMP frag_needed notifications will be ignored on 140 * this socket to prevent accepting spoofed ones. 141 */ 142 #define IP_PMTUDISC_INTERFACE 4 143 /* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get 144 * fragmented if they exceed the interface mtu 145 */ 146 #define IP_PMTUDISC_OMIT 5 147 148 #define IP_MULTICAST_IF 32 149 #define IP_MULTICAST_TTL 33 150 #define IP_MULTICAST_LOOP 34 151 #define IP_ADD_MEMBERSHIP 35 152 #define IP_DROP_MEMBERSHIP 36 153 #define IP_UNBLOCK_SOURCE 37 154 #define IP_BLOCK_SOURCE 38 155 #define IP_ADD_SOURCE_MEMBERSHIP 39 156 #define IP_DROP_SOURCE_MEMBERSHIP 40 157 #define IP_MSFILTER 41 158 #define MCAST_JOIN_GROUP 42 159 #define MCAST_BLOCK_SOURCE 43 160 #define MCAST_UNBLOCK_SOURCE 44 161 #define MCAST_LEAVE_GROUP 45 162 #define MCAST_JOIN_SOURCE_GROUP 46 163 #define MCAST_LEAVE_SOURCE_GROUP 47 164 #define MCAST_MSFILTER 48 165 #define IP_MULTICAST_ALL 49 166 #define IP_UNICAST_IF 50 167 #define IP_LOCAL_PORT_RANGE 51 168 #define IP_PROTOCOL 52 169 170 #define MCAST_EXCLUDE 0 171 #define MCAST_INCLUDE 1 172 173 /* These need to appear somewhere around here */ 174 #define IP_DEFAULT_MULTICAST_TTL 1 175 #define IP_DEFAULT_MULTICAST_LOOP 1 176 177 /* Request struct for multicast socket ops */ 178 179 #if __UAPI_DEF_IP_MREQ 180 struct ip_mreq { 181 struct in_addr imr_multiaddr; /* IP multicast address of group */ 182 struct in_addr imr_interface; /* local IP address of interface */ 183 }; 184 185 struct ip_mreqn { 186 struct in_addr imr_multiaddr; /* IP multicast address of group */ 187 struct in_addr imr_address; /* local IP address of interface */ 188 int imr_ifindex; /* Interface index */ 189 }; 190 191 struct ip_mreq_source { 192 __be32 imr_multiaddr; 193 __be32 imr_interface; 194 __be32 imr_sourceaddr; 195 }; 196 197 struct ip_msfilter { 198 __be32 imsf_multiaddr; 199 __be32 imsf_interface; 200 __u32 imsf_fmode; 201 __u32 imsf_numsrc; 202 union { 203 __be32 imsf_slist[1]; 204 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex); 205 }; 206 }; 207 208 #define IP_MSFILTER_SIZE(numsrc) \ 209 (sizeof(struct ip_msfilter) - sizeof(__u32) \ 210 + (numsrc) * sizeof(__u32)) 211 212 struct group_req { 213 __u32 gr_interface; /* interface index */ 214 struct __kernel_sockaddr_storage gr_group; /* group address */ 215 }; 216 217 struct group_source_req { 218 __u32 gsr_interface; /* interface index */ 219 struct __kernel_sockaddr_storage gsr_group; /* group address */ 220 struct __kernel_sockaddr_storage gsr_source; /* source address */ 221 }; 222 223 struct group_filter { 224 union { 225 struct { 226 __u32 gf_interface_aux; /* interface index */ 227 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */ 228 __u32 gf_fmode_aux; /* filter mode */ 229 __u32 gf_numsrc_aux; /* number of sources */ 230 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ 231 }; 232 struct { 233 __u32 gf_interface; /* interface index */ 234 struct __kernel_sockaddr_storage gf_group; /* multicast address */ 235 __u32 gf_fmode; /* filter mode */ 236 __u32 gf_numsrc; /* number of sources */ 237 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */ 238 }; 239 }; 240 }; 241 242 #define GROUP_FILTER_SIZE(numsrc) \ 243 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ 244 + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) 245 #endif 246 247 #if __UAPI_DEF_IN_PKTINFO 248 struct in_pktinfo { 249 int ipi_ifindex; 250 struct in_addr ipi_spec_dst; 251 struct in_addr ipi_addr; 252 }; 253 #endif 254 255 /* Structure describing an Internet (IP) socket address. */ 256 #if __UAPI_DEF_SOCKADDR_IN 257 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ 258 struct sockaddr_in { 259 __kernel_sa_family_t sin_family; /* Address family */ 260 __be16 sin_port; /* Port number */ 261 struct in_addr sin_addr; /* Internet address */ 262 263 /* Pad to size of `struct sockaddr'. */ 264 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - 265 sizeof(unsigned short int) - sizeof(struct in_addr)]; 266 }; 267 #define sin_zero __pad /* for BSD UNIX comp. -FvK */ 268 #endif 269 270 #if __UAPI_DEF_IN_CLASS 271 /* 272 * Definitions of the bits in an Internet address integer. 273 * On subnets, host and network parts are found according 274 * to the subnet mask, not these masks. 275 */ 276 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) 277 #define IN_CLASSA_NET 0xff000000 278 #define IN_CLASSA_NSHIFT 24 279 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 280 #define IN_CLASSA_MAX 128 281 282 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) 283 #define IN_CLASSB_NET 0xffff0000 284 #define IN_CLASSB_NSHIFT 16 285 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 286 #define IN_CLASSB_MAX 65536 287 288 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) 289 #define IN_CLASSC_NET 0xffffff00 290 #define IN_CLASSC_NSHIFT 8 291 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 292 293 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) 294 #define IN_MULTICAST(a) IN_CLASSD(a) 295 #define IN_MULTICAST_NET 0xe0000000 296 297 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff) 298 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a)) 299 300 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) 301 #define IN_CLASSE_NET 0xffffffff 302 #define IN_CLASSE_NSHIFT 0 303 304 /* Address to accept any incoming messages. */ 305 #define INADDR_ANY ((unsigned long int) 0x00000000) 306 307 /* Address to send to all hosts. */ 308 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) 309 310 /* Address indicating an error return. */ 311 #define INADDR_NONE ((unsigned long int) 0xffffffff) 312 313 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */ 314 #define INADDR_DUMMY ((unsigned long int) 0xc0000008) 315 316 /* Network number for local host loopback. */ 317 #define IN_LOOPBACKNET 127 318 319 /* Address to loopback in software to local host. */ 320 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ 321 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) 322 323 /* Defines for Multicast INADDR */ 324 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ 325 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ 326 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ 327 #define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */ 328 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ 329 #endif 330 331 /* <asm/byteorder.h> contains the htonl type stuff.. */ 332 #include <asm/byteorder.h> 333 334 335 #endif /* _LINUX_IN_H */