LXR linux/include/uapi/linux/in.h

   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.  */
  28enum {
  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. */
  85struct 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
 168struct 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
 173struct 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
 179struct ip_mreq_source {
 180        __be32          imr_multiaddr;
 181        __be32          imr_interface;
 182        __be32          imr_sourceaddr;
 183};
 184
 185struct 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
 197struct group_req {
 198        __u32                            gr_interface;  /* interface index */
 199        struct __kernel_sockaddr_storage gr_group;      /* group address */
 200};
 201
 202struct 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
 208struct 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
 222struct 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)      */
 232struct 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        0xF0000000
 270
 271#define IN_EXPERIMENTAL(a)      ((((long int) (a)) & 0xf0000000) == 0xf0000000)
 272#define IN_BADCLASS(a)          IN_EXPERIMENTAL((a))
 273
 274/* Address to accept any incoming messages. */
 275#define INADDR_ANY              ((unsigned long int) 0x00000000)
 276
 277/* Address to send to all hosts. */
 278#define INADDR_BROADCAST        ((unsigned long int) 0xffffffff)
 279
 280/* Address indicating an error return. */
 281#define INADDR_NONE             ((unsigned long int) 0xffffffff)
 282
 283/* Network number for local host loopback. */
 284#define IN_LOOPBACKNET          127
 285
 286/* Address to loopback in software to local host.  */
 287#define INADDR_LOOPBACK         0x7f000001      /* 127.0.0.1   */
 288#define IN_LOOPBACK(a)          ((((long int) (a)) & 0xff000000) == 0x7f000000)
 289
 290/* Defines for Multicast INADDR */
 291#define INADDR_UNSPEC_GROUP     0xe0000000U     /* 224.0.0.0   */
 292#define INADDR_ALLHOSTS_GROUP   0xe0000001U     /* 224.0.0.1   */
 293#define INADDR_ALLRTRS_GROUP    0xe0000002U     /* 224.0.0.2 */
 294#define INADDR_MAX_LOCAL_GROUP  0xe00000ffU     /* 224.0.0.255 */
 295#endif
 296
 297/* <asm/byteorder.h> contains the htonl type stuff.. */
 298#include <asm/byteorder.h> 
 299
 300
 301#endif /* _UAPI_LINUX_IN_H */
 302