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