sysdeps/generic/netinet/in.h

   1 /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _NETINET_IN_H
  20
  21 #define _NETINET_IN_H   1
  22 #include <features.h>
  23
  24 #include <sys/socket.h>
  25 #include <sys/types.h>
  26
  27 __BEGIN_DECLS
  28
  29 /* Standard well-defined IP protocols.  */
  30 enum
  31   {
  32     IPPROTO_IP = 0,     /* Dummy protocol for TCP.  */
  33     IPPROTO_ICMP = 1,   /* Internet Control Message Protocol.  */
  34     IPPROTO_IGMP = 2,   /* Internet Group Management Protocol. */
  35     IPPROTO_TCP = 6,    /* Transmission Control Protocol.  */
  36     IPPROTO_EGP = 8,    /* Exterior Gateway Protocol.  */
  37     IPPROTO_PUP = 12,   /* PUP protocol.  */
  38     IPPROTO_UDP = 17,   /* User Datagram Protocol.  */
  39     IPPROTO_IDP = 22,   /* XNS IDP protocol.  */
  40
  41     IPPROTO_RAW = 255,  /* Raw IP packets.  */
  42     IPPROTO_MAX
  43   };
  44
  45 /* Standard well-known ports.  */
  46 enum
  47   {
  48     IPPORT_ECHO = 7,            /* Echo service.  */
  49     IPPORT_DISCARD = 9,         /* Discard transmissions service.  */
  50     IPPORT_SYSTAT = 11,         /* System status service.  */
  51     IPPORT_DAYTIME = 13,        /* Time of day service.  */
  52     IPPORT_NETSTAT = 15,        /* Network status service.  */
  53     IPPORT_FTP = 21,            /* File Transfer Protocol.  */
  54     IPPORT_TELNET = 23,         /* Telnet protocol.  */
  55     IPPORT_SMTP = 25,           /* Simple Mail Transfer Protocol.  */
  56     IPPORT_TIMESERVER = 37,     /* Timeserver service.  */
  57     IPPORT_NAMESERVER = 42,     /* Domain Name Service.  */
  58     IPPORT_WHOIS = 43,          /* Internet Whois service.  */
  59     IPPORT_MTP = 57,
  60
  61     IPPORT_TFTP = 69,           /* Trivial File Transfer Protocol.  */
  62     IPPORT_RJE = 77,
  63     IPPORT_FINGER = 79,         /* Finger service.  */
  64     IPPORT_TTYLINK = 87,
  65     IPPORT_SUPDUP = 95,         /* SUPDUP protocol.  */
  66
  67
  68     IPPORT_EXECSERVER = 512,    /* execd service.  */
  69     IPPORT_LOGINSERVER = 513,   /* rlogind service.  */
  70     IPPORT_CMDSERVER = 514,
  71     IPPORT_EFSSERVER = 520,
  72
  73     /* UDP ports.  */
  74     IPPORT_BIFFUDP = 512,
  75     IPPORT_WHOSERVER = 513,
  76     IPPORT_ROUTESERVER = 520,
  77
  78     /* Ports less than this value are reserved for privileged processes.  */
  79     IPPORT_RESERVED = 1024,
  80
  81     /* Ports greater this value are reserved for (non-privileged) servers.  */
  82     IPPORT_USERRESERVED = 5000
  83   };
  84
  85
  86 /* Link numbers.  */
  87 #define IMPLINK_IP              155
  88 #define IMPLINK_LOWEXPER        156
  89 #define IMPLINK_HIGHEXPER       158
  90
  91
  92 /* Internet address.  */
  93 struct in_addr
  94   {
  95     unsigned int s_addr;
  96   };
  97
  98
  99 /* Definitions of the bits in an Internet address integer.
 100
 101    On subnets, host and network parts are found according to
 102    the subnet mask, not these masks.  */
 103
 104 #define IN_CLASSA(a)            ((((unsigned) (a)) & 0x80000000) == 0)
 105 #define IN_CLASSA_NET           0xff000000
 106 #define IN_CLASSA_NSHIFT        24
 107 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 108 #define IN_CLASSA_MAX           128
 109
 110 #define IN_CLASSB(a)            ((((unsigned) (a)) & 0xc0000000) == 0x80000000)
 111 #define IN_CLASSB_NET           0xffff0000
 112 #define IN_CLASSB_NSHIFT        16
 113 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 114 #define IN_CLASSB_MAX           65536
 115
 116 #define IN_CLASSC(a)            ((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
 117 #define IN_CLASSC_NET           0xffffff00
 118 #define IN_CLASSC_NSHIFT        8
 119 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 120
 121 #define IN_CLASSD(a)            ((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
 122 #define IN_MULTICAST(a)         IN_CLASSD(a)
 123
 124 #define IN_EXPERIMENTAL(a)      ((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
 125 #define IN_BADCLASS(a)          ((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
 126
 127 /* Address to accept any incoming messages.  */
 128 #define INADDR_ANY              ((unsigned) 0x00000000)
 129 /* Address to send to all hosts.  */
 130 #define INADDR_BROADCAST        ((unsigned) 0xffffffff)
 131 /* Address indicating an error return.  */
 132 #define INADDR_NONE             ((unsigned) 0xffffffff)
 133
 134 /* Network number for local host loopback.  */
 135 #define IN_LOOPBACKNET  127
 136 /* Address to loopback in software to local host.  */
 137 #ifndef INADDR_LOOPBACK
 138 #define INADDR_LOOPBACK ((unsigned) 0x7f000001) /* Inet address 127.0.0.1.  */
 139 #endif
 140
 141
 142 /* IPv6 address */
 143 struct in6_addr
 144   {
 145     union
 146       {
 147         u_int8_t        u6_addr8[16];
 148         u_int16_t       u6_addr16[8];
 149         u_int32_t       u6_addr32[4];
 150 #if (~0UL) > 0xffffffff
 151         u_int64_t       u6_addr64[2];
 152 #endif
 153       } in6_u;
 154 #define s6_addr                 in6_u.u6_addr8
 155 #define s6_addr16               in6_u.u6_addr16
 156 #define s6_addr32               in6_u.u6_addr32
 157 #define s6_addr64               in6_u.u6_addr64
 158   };
 159
 160 extern const struct in6_addr in6addr_any;        /* :: */
 161 extern const struct in6_addr in6addr_loopback;   /* ::1 */
 162 #define IN6ADDR_ANY_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
 163 #define IN6ADDR_LOOPBACK_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }
 164
 165 #define INET_ADDRSTRLEN 16
 166 #define INET6_ADDRSTRLEN 46
 167
 168
 169
 170 /* Get the definition of the macro to define the common sockaddr members.  */
 171 #include <sockaddrcom.h>
 172
 173
 174 /* Structure describing an Internet socket address.  */
 175 struct sockaddr_in
 176   {
 177     __SOCKADDR_COMMON (sin_);
 178     unsigned short int sin_port;        /* Port number.  */
 179     struct in_addr sin_addr;            /* Internet address.  */
 180
 181     /* Pad to size of `struct sockaddr'.  */
 182     unsigned char sin_zero[sizeof(struct sockaddr) -
 183                            __SOCKADDR_COMMON_SIZE -
 184                            sizeof(unsigned short int) -
 185                            sizeof(struct in_addr)];
 186   };
 187
 188 /* Ditto, for IPv6.  */
 189 struct sockaddr_in6
 190   {
 191     __SOCKADDR_COMMON (sin6_);
 192     u_int16_t           sin6_port;      /* Transport layer port # */
 193     u_int32_t           sin6_flowinfo;  /* IPv6 flow information */
 194     struct in6_addr     sin6_addr;      /* IPv6 address */
 195   };
 196
 197 /* IPv6 multicast request.  */
 198 struct ipv6_mreq
 199   {
 200     /* IPv6 multicast address of group */
 201     struct in6_addr ipv6mr_multiaddr;
 202
 203     /* local IPv6 address of interface */
 204     int         ipv6mr_ifindex;
 205   };
 206
 207 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
 208    The first word in the comment at the right is the data type used;
 209    "bool" means a boolean value stored in an `int'.  */
 210 #define IP_OPTIONS      1       /* ip_opts; IP per-packet options.  */
 211 #define IP_HDRINCL      2       /* int; Header is included with data.  */
 212 #define IP_TOS          3       /* int; IP type of service and precedence.  */
 213 #define IP_TTL          4       /* int; IP time to live.  */
 214 #define IP_RECVOPTS     5       /* bool; Receive all IP options w/datagram.  */
 215 #define IP_RECVRETOPTS  6       /* bool; Receive IP options for response.  */
 216 #define IP_RECVDSTADDR  7       /* bool; Receive IP dst addr w/datagram.  */
 217 #define IP_RETOPTS      8       /* ip_opts; Set/get IP per-packet options.  */
 218 #define IP_MULTICAST_IF 9       /* in_addr; set/get IP multicast i/f */
 219 #define IP_MULTICAST_TTL 10     /* u_char; set/get IP multicast ttl */
 220 #define IP_MULTICAST_LOOP 11    /* i_char; set/get IP multicast loopback */
 221 #define IP_ADD_MEMBERSHIP 12    /* ip_mreq; add an IP group membership */
 222 #define IP_DROP_MEMBERSHIP 13   /* ip_mreq; drop an IP group membership */
 223
 224 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
 225    The `ip_dst' field is used for the first-hop gateway when using a
 226    source route (this gets put into the header proper).  */
 227 struct ip_opts
 228   {
 229     struct in_addr ip_dst;      /* First hop; zero without source route.  */
 230     char ip_opts[40];           /* Actually variable in size.  */
 231   };
 232
 233 /* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
 234 struct ip_mreq
 235 {
 236   struct in_addr imr_multiaddr; /* IP multicast address of group */
 237   struct in_addr imr_interface; /* local IP address of interface */
 238 };
 239
 240 /* Functions to convert between host and network byte order.
 241
 242    Please note that these functions normally take `unsigned long int' or
 243    `unsigned short int' values as arguments and also return them.  But
 244    this was a short-sighted decision since on different systems the types
 245    may have different representations but the values are always the same.  */
 246
 247 extern u_int32_t ntohl __P ((u_int32_t __netlong));
 248 extern u_int16_t ntohs __P ((u_int16_t __netshort));
 249 extern u_int32_t htonl __P ((u_int32_t __hostlong));
 250 extern u_int16_t htons __P ((u_int16_t __hostshort));
 251
 252 #include <endian.h>
 253
 254 #if __BYTE_ORDER == __BIG_ENDIAN
 255 /* The host byte order is the same as network byte order,
 256    so these functions are all just identity.  */
 257 #define ntohl(x)        (x)
 258 #define ntohs(x)        (x)
 259 #define htonl(x)        (x)
 260 #define htons(x)        (x)
 261 #endif
 262
 263 /* IPV6 socket options.  */
 264 #define IPV6_ADDRFORM           1
 265 #define IPV6_RXINFO             2
 266 #define IPV6_RXHOPOPTS          3
 267 #define IPV6_RXDSTOPTS          4
 268 #define IPV6_RXSRCRT            5
 269 #define IPV6_PKTOPTIONS         6
 270 #define IPV6_CHECKSUM           7
 271 #define IPV6_HOPLIMIT           8
 272
 273 #define IPV6_TXINFO             IPV6_RXINFO
 274 #define SCM_SRCINFO             IPV6_TXINFO
 275 #define SCM_SRCRT               IPV6_RXSRCRT
 276
 277 #define IPV6_UNICAST_HOPS       16
 278 #define IPV6_MULTICAST_IF       17
 279 #define IPV6_MULTICAST_HOPS     18
 280 #define IPV6_MULTICAST_LOOP     19
 281 #define IPV6_ADD_MEMBERSHIP     20
 282 #define IPV6_DROP_MEMBERSHIP    21
 283
 284 #define IN6_IS_ADDR_UNSPECIFIED(a) \
 285         ((((u_int32_t *)(a))[0] == 0) && ((u_int32_t *)(a))[1] == 0) && \
 286          (((u_int32_t *)(a))[2] == 0) && ((u_int32_t *)(a))[3] == 0))
 287
 288 #define IN6_IS_ADDR_LOOPBACK(a) \
 289         ((((u_int32_t *)(a))[0] == 0) && ((u_int32_t *)(a))[1] == 0) && \
 290          (((u_int32_t *)(a))[2] == 0) && ((u_int32_t *)(a))[3] == htonl(1)))
 291
 292 #define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t *)(a))[0] == 0xff)
 293
 294 #define IN6_IS_ADDR_LINKLOCAL(a) \
 295         ((((u_int32_t *)(a))[0] & htonl(0xffc00000)) == htonl(0xfe800000))
 296
 297 #define IN6_IS_ADDR_SITELOCAL(a) \
 298         ((((u_int32_t *)(a))[0] & htonl(0xffc00000)) == htonl(0xfec00000))
 299
 300 #define IN6_IS_ADDR_V4MAPPED(a) \
 301         ((((u_int32_t *)(a))[0] == 0) && (((u_int32_t *)(a))[1] == 0) && \
 302          (((u_int32_t *)(a))[2] == htonl(0xffff)))
 303
 304 #define IN6_IS_ADDR_V4COMPAT(a) \
 305         ((((u_int32_t *)(a))[0] == 0) && (((u_int32_t *)(a))[1] == 0) && \
 306          (((u_int32_t *)(a))[2] == 0) && (ntohl(((u_int32_t *)(a))[3]) > 1))
 307
 308
 309 __END_DECLS
 310
 311 #endif  /* netinet/in.h */