include/uapi/linux/in.h

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions of the Internet Protocol.
   7  *
   8  * Version:     @(#)in.h        1.0.1   04/21/93
   9  *
  10  * Authors:     Original taken from the GNU Project <netinet/in.h> file.
  11  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *
  13  *              This program is free software; you can redistribute it and/or
  14  *              modify it under the terms of the GNU General Public License
  15  *              as published by the Free Software Foundation; either version
  16  *              2 of the License, or (at your option) any later version.
  17  */
  18 #ifndef _UAPI_LINUX_IN_H
  19 #define _UAPI_LINUX_IN_H
  20
  21 #include <linux/types.h>
  22 #include <linux/socket.h>
  23
  24 /* Standard well-defined IP protocols.  */
  25 enum {
  26   IPPROTO_IP = 0,               /* Dummy protocol for TCP               */
  27 #define IPPROTO_IP              IPPROTO_IP
  28   IPPROTO_ICMP = 1,             /* Internet Control Message Protocol    */
  29 #define IPPROTO_ICMP            IPPROTO_ICMP
  30   IPPROTO_IGMP = 2,             /* Internet Group Management Protocol   */
  31 #define IPPROTO_IGMP            IPPROTO_IGMP
  32   IPPROTO_IPIP = 4,             /* IPIP tunnels (older KA9Q tunnels use 94) */
  33 #define IPPROTO_IPIP            IPPROTO_IPIP
  34   IPPROTO_TCP = 6,              /* Transmission Control Protocol        */
  35 #define IPPROTO_TCP             IPPROTO_TCP
  36   IPPROTO_EGP = 8,              /* Exterior Gateway Protocol            */
  37 #define IPPROTO_EGP             IPPROTO_EGP
  38   IPPROTO_PUP = 12,             /* PUP protocol                         */
  39 #define IPPROTO_PUP             IPPROTO_PUP
  40   IPPROTO_UDP = 17,             /* User Datagram Protocol               */
  41 #define IPPROTO_UDP             IPPROTO_UDP
  42   IPPROTO_IDP = 22,             /* XNS IDP protocol                     */
  43 #define IPPROTO_IDP             IPPROTO_IDP
  44   IPPROTO_TP = 29,              /* SO Transport Protocol Class 4        */
  45 #define IPPROTO_TP              IPPROTO_TP
  46   IPPROTO_DCCP = 33,            /* Datagram Congestion Control Protocol */
  47 #define IPPROTO_DCCP            IPPROTO_DCCP
  48   IPPROTO_IPV6 = 41,            /* IPv6-in-IPv4 tunnelling              */
  49 #define IPPROTO_IPV6            IPPROTO_IPV6
  50   IPPROTO_RSVP = 46,            /* RSVP Protocol                        */
  51 #define IPPROTO_RSVP            IPPROTO_RSVP
  52   IPPROTO_GRE = 47,             /* Cisco GRE tunnels (rfc 1701,1702)    */
  53 #define IPPROTO_GRE             IPPROTO_GRE
  54   IPPROTO_ESP = 50,             /* Encapsulation Security Payload protocol */
  55 #define IPPROTO_ESP             IPPROTO_ESP
  56   IPPROTO_AH = 51,              /* Authentication Header protocol       */
  57 #define IPPROTO_AH              IPPROTO_AH
  58   IPPROTO_MTP = 92,             /* Multicast Transport Protocol         */
  59 #define IPPROTO_MTP             IPPROTO_MTP
  60   IPPROTO_BEETPH = 94,          /* IP option pseudo header for BEET     */
  61 #define IPPROTO_BEETPH          IPPROTO_BEETPH
  62   IPPROTO_ENCAP = 98,           /* Encapsulation Header                 */
  63 #define IPPROTO_ENCAP           IPPROTO_ENCAP
  64   IPPROTO_PIM = 103,            /* Protocol Independent Multicast       */
  65 #define IPPROTO_PIM             IPPROTO_PIM
  66   IPPROTO_COMP = 108,           /* Compression Header Protocol          */
  67 #define IPPROTO_COMP            IPPROTO_COMP
  68   IPPROTO_SCTP = 132,           /* Stream Control Transport Protocol    */
  69 #define IPPROTO_SCTP            IPPROTO_SCTP
  70   IPPROTO_UDPLITE = 136,        /* UDP-Lite (RFC 3828)                  */
  71 #define IPPROTO_UDPLITE         IPPROTO_UDPLITE
  72   IPPROTO_RAW = 255,            /* Raw IP packets                       */
  73 #define IPPROTO_RAW             IPPROTO_RAW
  74   IPPROTO_MAX
  75 };
  76
  77
  78 /* Internet address. */
  79 struct in_addr {
  80         __be32  s_addr;
  81 };
  82
  83 #define IP_TOS          1
  84 #define IP_TTL          2
  85 #define IP_HDRINCL      3
  86 #define IP_OPTIONS      4
  87 #define IP_ROUTER_ALERT 5
  88 #define IP_RECVOPTS     6
  89 #define IP_RETOPTS      7
  90 #define IP_PKTINFO      8
  91 #define IP_PKTOPTIONS   9
  92 #define IP_MTU_DISCOVER 10
  93 #define IP_RECVERR      11
  94 #define IP_RECVTTL      12
  95 #define IP_RECVTOS      13
  96 #define IP_MTU          14
  97 #define IP_FREEBIND     15
  98 #define IP_IPSEC_POLICY 16
  99 #define IP_XFRM_POLICY  17
 100 #define IP_PASSSEC      18
 101 #define IP_TRANSPARENT  19
 102
 103 /* BSD compatibility */
 104 #define IP_RECVRETOPTS  IP_RETOPTS
 105
 106 /* TProxy original addresses */
 107 #define IP_ORIGDSTADDR       20
 108 #define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR
 109
 110 #define IP_MINTTL       21
 111 #define IP_NODEFRAG     22
 112
 113 /* IP_MTU_DISCOVER values */
 114 #define IP_PMTUDISC_DONT                0       /* Never send DF frames */
 115 #define IP_PMTUDISC_WANT                1       /* Use per route hints  */
 116 #define IP_PMTUDISC_DO                  2       /* Always DF            */
 117 #define IP_PMTUDISC_PROBE               3       /* Ignore dst pmtu      */
 118 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
 119  * Also incoming ICMP frag_needed notifications will be ignored on
 120  * this socket to prevent accepting spoofed ones.
 121  */
 122 #define IP_PMTUDISC_INTERFACE           4
 123
 124 #define IP_MULTICAST_IF                 32
 125 #define IP_MULTICAST_TTL                33
 126 #define IP_MULTICAST_LOOP               34
 127 #define IP_ADD_MEMBERSHIP               35
 128 #define IP_DROP_MEMBERSHIP              36
 129 #define IP_UNBLOCK_SOURCE               37
 130 #define IP_BLOCK_SOURCE                 38
 131 #define IP_ADD_SOURCE_MEMBERSHIP        39
 132 #define IP_DROP_SOURCE_MEMBERSHIP       40
 133 #define IP_MSFILTER                     41
 134 #define MCAST_JOIN_GROUP                42
 135 #define MCAST_BLOCK_SOURCE              43
 136 #define MCAST_UNBLOCK_SOURCE            44
 137 #define MCAST_LEAVE_GROUP               45
 138 #define MCAST_JOIN_SOURCE_GROUP         46
 139 #define MCAST_LEAVE_SOURCE_GROUP        47
 140 #define MCAST_MSFILTER                  48
 141 #define IP_MULTICAST_ALL                49
 142 #define IP_UNICAST_IF                   50
 143
 144 #define MCAST_EXCLUDE   0
 145 #define MCAST_INCLUDE   1
 146
 147 /* These need to appear somewhere around here */
 148 #define IP_DEFAULT_MULTICAST_TTL        1
 149 #define IP_DEFAULT_MULTICAST_LOOP       1
 150
 151 /* Request struct for multicast socket ops */
 152
 153 struct ip_mreq  {
 154         struct in_addr imr_multiaddr;   /* IP multicast address of group */
 155         struct in_addr imr_interface;   /* local IP address of interface */
 156 };
 157
 158 struct ip_mreqn {
 159         struct in_addr  imr_multiaddr;          /* IP multicast address of group */
 160         struct in_addr  imr_address;            /* local IP address of interface */
 161         int             imr_ifindex;            /* Interface index */
 162 };
 163
 164 struct ip_mreq_source {
 165         __be32          imr_multiaddr;
 166         __be32          imr_interface;
 167         __be32          imr_sourceaddr;
 168 };
 169
 170 struct ip_msfilter {
 171         __be32          imsf_multiaddr;
 172         __be32          imsf_interface;
 173         __u32           imsf_fmode;
 174         __u32           imsf_numsrc;
 175         __be32          imsf_slist[1];
 176 };
 177
 178 #define IP_MSFILTER_SIZE(numsrc) \
 179         (sizeof(struct ip_msfilter) - sizeof(__u32) \
 180         + (numsrc) * sizeof(__u32))
 181
 182 struct group_req {
 183         __u32                            gr_interface;  /* interface index */
 184         struct __kernel_sockaddr_storage gr_group;      /* group address */
 185 };
 186
 187 struct group_source_req {
 188         __u32                            gsr_interface; /* interface index */
 189         struct __kernel_sockaddr_storage gsr_group;     /* group address */
 190         struct __kernel_sockaddr_storage gsr_source;    /* source address */
 191 };
 192
 193 struct group_filter {
 194         __u32                            gf_interface;  /* interface index */
 195         struct __kernel_sockaddr_storage gf_group;      /* multicast address */
 196         __u32                            gf_fmode;      /* filter mode */
 197         __u32                            gf_numsrc;     /* number of sources */
 198         struct __kernel_sockaddr_storage gf_slist[1];   /* interface index */
 199 };
 200
 201 #define GROUP_FILTER_SIZE(numsrc) \
 202         (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
 203         + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
 204
 205 struct in_pktinfo {
 206         int             ipi_ifindex;
 207         struct in_addr  ipi_spec_dst;
 208         struct in_addr  ipi_addr;
 209 };
 210
 211 /* Structure describing an Internet (IP) socket address. */
 212 #define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
 213 struct sockaddr_in {
 214   __kernel_sa_family_t  sin_family;     /* Address family               */
 215   __be16                sin_port;       /* Port number                  */
 216   struct in_addr        sin_addr;       /* Internet address             */
 217
 218   /* Pad to size of `struct sockaddr'. */
 219   unsigned char         __pad[__SOCK_SIZE__ - sizeof(short int) -
 220                         sizeof(unsigned short int) - sizeof(struct in_addr)];
 221 };
 222 #define sin_zero        __pad           /* for BSD UNIX comp. -FvK      */
 223
 224
 225 /*
 226  * Definitions of the bits in an Internet address integer.
 227  * On subnets, host and network parts are found according
 228  * to the subnet mask, not these masks.
 229  */
 230 #define IN_CLASSA(a)            ((((long int) (a)) & 0x80000000) == 0)
 231 #define IN_CLASSA_NET           0xff000000
 232 #define IN_CLASSA_NSHIFT        24
 233 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 234 #define IN_CLASSA_MAX           128
 235
 236 #define IN_CLASSB(a)            ((((long int) (a)) & 0xc0000000) == 0x80000000)
 237 #define IN_CLASSB_NET           0xffff0000
 238 #define IN_CLASSB_NSHIFT        16
 239 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 240 #define IN_CLASSB_MAX           65536
 241
 242 #define IN_CLASSC(a)            ((((long int) (a)) & 0xe0000000) == 0xc0000000)
 243 #define IN_CLASSC_NET           0xffffff00
 244 #define IN_CLASSC_NSHIFT        8
 245 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 246
 247 #define IN_CLASSD(a)            ((((long int) (a)) & 0xf0000000) == 0xe0000000)
 248 #define IN_MULTICAST(a)         IN_CLASSD(a)
 249 #define IN_MULTICAST_NET        0xF0000000
 250
 251 #define IN_EXPERIMENTAL(a)      ((((long int) (a)) & 0xf0000000) == 0xf0000000)
 252 #define IN_BADCLASS(a)          IN_EXPERIMENTAL((a))
 253
 254 /* Address to accept any incoming messages. */
 255 #define INADDR_ANY              ((unsigned long int) 0x00000000)
 256
 257 /* Address to send to all hosts. */
 258 #define INADDR_BROADCAST        ((unsigned long int) 0xffffffff)
 259
 260 /* Address indicating an error return. */
 261 #define INADDR_NONE             ((unsigned long int) 0xffffffff)
 262
 263 /* Network number for local host loopback. */
 264 #define IN_LOOPBACKNET          127
 265
 266 /* Address to loopback in software to local host.  */
 267 #define INADDR_LOOPBACK         0x7f000001      /* 127.0.0.1   */
 268 #define IN_LOOPBACK(a)          ((((long int) (a)) & 0xff000000) == 0x7f000000)
 269
 270 /* Defines for Multicast INADDR */
 271 #define INADDR_UNSPEC_GROUP     0xe0000000U     /* 224.0.0.0   */
 272 #define INADDR_ALLHOSTS_GROUP   0xe0000001U     /* 224.0.0.1   */
 273 #define INADDR_ALLRTRS_GROUP    0xe0000002U     /* 224.0.0.2 */
 274 #define INADDR_MAX_LOCAL_GROUP  0xe00000ffU     /* 224.0.0.255 */
 275
 276
 277 /* <asm/byteorder.h> contains the htonl type stuff.. */
 278 #include <asm/byteorder.h>
 279
 280
 281 #endif /* _UAPI_LINUX_IN_H */