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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/*3 * INET An implementation of the TCP/IP protocol suite for the LINUX4 * operating system. INET is implemented using the BSD Socket5 * 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 04/21/9310 *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/or15 * modify it under the terms of the GNU General Public License16 * as published by the Free Software Foundation; either version17 * 2 of the License, or (at your option) any later version.18 */19#ifndef _UAPI_LINUX_IN_H20#define _UAPI_LINUX_IN_H21 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_IPPROTO28/* Standard well-defined IP protocols. */29enum {30 IPPROTO_IP = 0, /* Dummy protocol for TCP */31#define IPPROTO_IP IPPROTO_IP32 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */33#define IPPROTO_ICMP IPPROTO_ICMP34 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */35#define IPPROTO_IGMP IPPROTO_IGMP36 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */37#define IPPROTO_IPIP IPPROTO_IPIP38 IPPROTO_TCP = 6, /* Transmission Control Protocol */39#define IPPROTO_TCP IPPROTO_TCP40 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */41#define IPPROTO_EGP IPPROTO_EGP42 IPPROTO_PUP = 12, /* PUP protocol */43#define IPPROTO_PUP IPPROTO_PUP44 IPPROTO_UDP = 17, /* User Datagram Protocol */45#define IPPROTO_UDP IPPROTO_UDP46 IPPROTO_IDP = 22, /* XNS IDP protocol */47#define IPPROTO_IDP IPPROTO_IDP48 IPPROTO_TP = 29, /* SO Transport Protocol Class 4 */49#define IPPROTO_TP IPPROTO_TP50 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */51#define IPPROTO_DCCP IPPROTO_DCCP52 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */53#define IPPROTO_IPV6 IPPROTO_IPV654 IPPROTO_RSVP = 46, /* RSVP Protocol */55#define IPPROTO_RSVP IPPROTO_RSVP56 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */57#define IPPROTO_GRE IPPROTO_GRE58 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */59#define IPPROTO_ESP IPPROTO_ESP60 IPPROTO_AH = 51, /* Authentication Header protocol */61#define IPPROTO_AH IPPROTO_AH62 IPPROTO_MTP = 92, /* Multicast Transport Protocol */63#define IPPROTO_MTP IPPROTO_MTP64 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */65#define IPPROTO_BEETPH IPPROTO_BEETPH66 IPPROTO_ENCAP = 98, /* Encapsulation Header */67#define IPPROTO_ENCAP IPPROTO_ENCAP68 IPPROTO_PIM = 103, /* Protocol Independent Multicast */69#define IPPROTO_PIM IPPROTO_PIM70 IPPROTO_COMP = 108, /* Compression Header Protocol */71#define IPPROTO_COMP IPPROTO_COMP72 IPPROTO_L2TP = 115, /* Layer 2 Tunnelling Protocol */73#define IPPROTO_L2TP IPPROTO_L2TP74 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */75#define IPPROTO_SCTP IPPROTO_SCTP76 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */77#define IPPROTO_UDPLITE IPPROTO_UDPLITE78 IPPROTO_MPLS = 137, /* MPLS in IP (RFC 4023) */79#define IPPROTO_MPLS IPPROTO_MPLS80 IPPROTO_ETHERNET = 143, /* Ethernet-within-IPv6 Encapsulation */81#define IPPROTO_ETHERNET IPPROTO_ETHERNET82 IPPROTO_RAW = 255, /* Raw IP packets */83#define IPPROTO_RAW IPPROTO_RAW84 IPPROTO_SMC = 256, /* Shared Memory Communications */85#define IPPROTO_SMC IPPROTO_SMC86 IPPROTO_MPTCP = 262, /* Multipath TCP connection */87#define IPPROTO_MPTCP IPPROTO_MPTCP88 IPPROTO_MAX89};90#endif91 92#if __UAPI_DEF_IN_ADDR93/* Internet address. */94struct in_addr {95 __be32 s_addr;96};97#endif98 99#define IP_TOS 1100#define IP_TTL 2101#define IP_HDRINCL 3102#define IP_OPTIONS 4103#define IP_ROUTER_ALERT 5104#define IP_RECVOPTS 6105#define IP_RETOPTS 7106#define IP_PKTINFO 8107#define IP_PKTOPTIONS 9108#define IP_MTU_DISCOVER 10109#define IP_RECVERR 11110#define IP_RECVTTL 12111#define IP_RECVTOS 13112#define IP_MTU 14113#define IP_FREEBIND 15114#define IP_IPSEC_POLICY 16115#define IP_XFRM_POLICY 17116#define IP_PASSSEC 18117#define IP_TRANSPARENT 19118 119/* BSD compatibility */120#define IP_RECVRETOPTS IP_RETOPTS121 122/* TProxy original addresses */123#define IP_ORIGDSTADDR 20124#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR125 126#define IP_MINTTL 21127#define IP_NODEFRAG 22128#define IP_CHECKSUM 23129#define IP_BIND_ADDRESS_NO_PORT 24130#define IP_RECVFRAGSIZE 25131#define IP_RECVERR_RFC4884 26132 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 on140 * this socket to prevent accepting spoofed ones.141 */142#define IP_PMTUDISC_INTERFACE 4143/* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get144 * fragmented if they exceed the interface mtu145 */146#define IP_PMTUDISC_OMIT 5147 148#define IP_MULTICAST_IF 32149#define IP_MULTICAST_TTL 33150#define IP_MULTICAST_LOOP 34151#define IP_ADD_MEMBERSHIP 35152#define IP_DROP_MEMBERSHIP 36153#define IP_UNBLOCK_SOURCE 37154#define IP_BLOCK_SOURCE 38155#define IP_ADD_SOURCE_MEMBERSHIP 39156#define IP_DROP_SOURCE_MEMBERSHIP 40157#define IP_MSFILTER 41158#define MCAST_JOIN_GROUP 42159#define MCAST_BLOCK_SOURCE 43160#define MCAST_UNBLOCK_SOURCE 44161#define MCAST_LEAVE_GROUP 45162#define MCAST_JOIN_SOURCE_GROUP 46163#define MCAST_LEAVE_SOURCE_GROUP 47164#define MCAST_MSFILTER 48165#define IP_MULTICAST_ALL 49166#define IP_UNICAST_IF 50167#define IP_LOCAL_PORT_RANGE 51168#define IP_PROTOCOL 52169 170#define MCAST_EXCLUDE 0171#define MCAST_INCLUDE 1172 173/* These need to appear somewhere around here */174#define IP_DEFAULT_MULTICAST_TTL 1175#define IP_DEFAULT_MULTICAST_LOOP 1176 177/* Request struct for multicast socket ops */178 179#if __UAPI_DEF_IP_MREQ180struct 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 185struct 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 191struct ip_mreq_source {192 __be32 imr_multiaddr;193 __be32 imr_interface;194 __be32 imr_sourceaddr;195};196 197struct 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 212struct group_req {213 __u32 gr_interface; /* interface index */214 struct __kernel_sockaddr_storage gr_group; /* group address */215};216 217struct 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 223struct 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#endif246 247#if __UAPI_DEF_IN_PKTINFO248struct in_pktinfo {249 int ipi_ifindex;250 struct in_addr ipi_spec_dst;251 struct in_addr ipi_addr;252};253#endif254 255/* Structure describing an Internet (IP) socket address. */256#if __UAPI_DEF_SOCKADDR_IN257#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */258struct 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#endif269 270#if __UAPI_DEF_IN_CLASS271/*272 * Definitions of the bits in an Internet address integer.273 * On subnets, host and network parts are found according274 * to the subnet mask, not these masks.275 */276#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)277#define IN_CLASSA_NET 0xff000000278#define IN_CLASSA_NSHIFT 24279#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)280#define IN_CLASSA_MAX 128281 282#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)283#define IN_CLASSB_NET 0xffff0000284#define IN_CLASSB_NSHIFT 16285#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)286#define IN_CLASSB_MAX 65536287 288#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)289#define IN_CLASSC_NET 0xffffff00290#define IN_CLASSC_NSHIFT 8291#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 0xe0000000296 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 0xffffffff302#define IN_CLASSE_NSHIFT 0303 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 127318 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#endif330 331/* <asm/byteorder.h> contains the htonl type stuff.. */332#include <asm/byteorder.h> 333 334 335#endif /* _UAPI_LINUX_IN_H */336