inet/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
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) 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 GNU
  12    Library 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 #define _NETINET_IN_H   1
  21
  22 #include <features.h>
  23 #include <inttypes.h>
  24
  25 #include <sys/socket.h>
  26 #include <sys/types.h>
  27
  28
  29 __BEGIN_DECLS
  30
  31 /* Standard well-defined IP protocols.  */
  32 enum
  33   {
  34     IPPROTO_IP = 0,        /* Dummy protocol for TCP.  */
  35     IPPROTO_HOPOPTS = 0,   /* IPv6 Hop-by-Hop options.  */
  36     IPPROTO_ICMP = 1,      /* Internet Control Message Protocol.  */
  37     IPPROTO_IGMP = 2,      /* Internet Group Management Protocol. */
  38     IPPROTO_IPIP = 4,      /* IPIP tunnels (older KA9Q tunnels use 94).  */
  39     IPPROTO_TCP = 6,       /* Transmission Control Protocol.  */
  40     IPPROTO_EGP = 8,       /* Exterior Gateway Protocol.  */
  41     IPPROTO_PUP = 12,      /* PUP protocol.  */
  42     IPPROTO_UDP = 17,      /* User Datagram Protocol.  */
  43     IPPROTO_IDP = 22,      /* XNS IDP protocol.  */
  44     IPPROTO_IPV6 = 41,     /* IPv6 header.  */
  45     IPPROTO_ROUTING = 43,  /* IPv6 routing header.  */
  46     IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header.  */
  47     IPPROTO_ESP = 50,      /* encapsulating security payload.  */
  48     IPPROTO_AH = 51,       /* authentication header.  */
  49     IPPROTO_ICMPV6 = 58,   /* ICMPv6.  */
  50     IPPROTO_NONE = 59,     /* IPv6 no next header.  */
  51     IPPROTO_DSTOPTS = 60,  /* IPv6 destination options.  */
  52     IPPROTO_RAW = 255,     /* Raw IP packets.  */
  53     IPPROTO_MAX
  54   };
  55
  56 /* Standard well-known ports.  */
  57 enum
  58   {
  59     IPPORT_ECHO = 7,            /* Echo service.  */
  60     IPPORT_DISCARD = 9,         /* Discard transmissions service.  */
  61     IPPORT_SYSTAT = 11,         /* System status service.  */
  62     IPPORT_DAYTIME = 13,        /* Time of day service.  */
  63     IPPORT_NETSTAT = 15,        /* Network status service.  */
  64     IPPORT_FTP = 21,            /* File Transfer Protocol.  */
  65     IPPORT_TELNET = 23,         /* Telnet protocol.  */
  66     IPPORT_SMTP = 25,           /* Simple Mail Transfer Protocol.  */
  67     IPPORT_TIMESERVER = 37,     /* Timeserver service.  */
  68     IPPORT_NAMESERVER = 42,     /* Domain Name Service.  */
  69     IPPORT_WHOIS = 43,          /* Internet Whois service.  */
  70     IPPORT_MTP = 57,
  71
  72     IPPORT_TFTP = 69,           /* Trivial File Transfer Protocol.  */
  73     IPPORT_RJE = 77,
  74     IPPORT_FINGER = 79,         /* Finger service.  */
  75     IPPORT_TTYLINK = 87,
  76     IPPORT_SUPDUP = 95,         /* SUPDUP protocol.  */
  77
  78
  79     IPPORT_EXECSERVER = 512,    /* execd service.  */
  80     IPPORT_LOGINSERVER = 513,   /* rlogind service.  */
  81     IPPORT_CMDSERVER = 514,
  82     IPPORT_EFSSERVER = 520,
  83
  84     /* UDP ports.  */
  85     IPPORT_BIFFUDP = 512,
  86     IPPORT_WHOSERVER = 513,
  87     IPPORT_ROUTESERVER = 520,
  88
  89     /* Ports less than this value are reserved for privileged processes.  */
  90     IPPORT_RESERVED = 1024,
  91
  92     /* Ports greater this value are reserved for (non-privileged) servers.  */
  93     IPPORT_USERRESERVED = 5000
  94   };
  95
  96
  97 /* Internet address.  */
  98 struct in_addr
  99   {
 100     uint32_t s_addr;
 101   };
 102
 103
 104 /* Definitions of the bits in an Internet address integer.
 105
 106    On subnets, host and network parts are found according to
 107    the subnet mask, not these masks.  */
 108
 109 #define IN_CLASSA(a)            ((((unsigned) (a)) & 0x80000000) == 0)
 110 #define IN_CLASSA_NET           0xff000000
 111 #define IN_CLASSA_NSHIFT        24
 112 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 113 #define IN_CLASSA_MAX           128
 114
 115 #define IN_CLASSB(a)            ((((unsigned) (a)) & 0xc0000000) == 0x80000000)
 116 #define IN_CLASSB_NET           0xffff0000
 117 #define IN_CLASSB_NSHIFT        16
 118 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 119 #define IN_CLASSB_MAX           65536
 120
 121 #define IN_CLASSC(a)            ((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
 122 #define IN_CLASSC_NET           0xffffff00
 123 #define IN_CLASSC_NSHIFT        8
 124 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 125
 126 #define IN_CLASSD(a)            ((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
 127 #define IN_MULTICAST(a)         IN_CLASSD(a)
 128
 129 #define IN_EXPERIMENTAL(a)      ((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
 130 #define IN_BADCLASS(a)          ((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
 131
 132 /* Address to accept any incoming messages.  */
 133 #define INADDR_ANY              ((unsigned) 0x00000000)
 134 /* Address to send to all hosts.  */
 135 #define INADDR_BROADCAST        ((unsigned) 0xffffffff)
 136 /* Address indicating an error return.  */
 137 #define INADDR_NONE             ((unsigned) 0xffffffff)
 138
 139 /* Network number for local host loopback.  */
 140 #define IN_LOOPBACKNET  127
 141 /* Address to loopback in software to local host.  */
 142 #ifndef INADDR_LOOPBACK
 143 # define INADDR_LOOPBACK        ((unsigned) 0x7f000001) /* Inet 127.0.0.1.  */
 144 #endif
 145
 146
 147 /* IPv6 address */
 148 struct in6_addr
 149   {
 150     union
 151       {
 152         uint8_t         u6_addr8[16];
 153         uint16_t        u6_addr16[8];
 154         uint32_t        u6_addr32[4];
 155 #if (~0UL) > 0xffffffff
 156         uint64_t        u6_addr64[2];
 157 #endif
 158       } in6_u;
 159 #define s6_addr                 in6_u.u6_addr8
 160 #define s6_addr16               in6_u.u6_addr16
 161 #define s6_addr32               in6_u.u6_addr32
 162 #define s6_addr64               in6_u.u6_addr64
 163   };
 164
 165 extern const struct in6_addr in6addr_any;        /* :: */
 166 extern const struct in6_addr in6addr_loopback;   /* ::1 */
 167 #define IN6ADDR_ANY_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
 168 #define IN6ADDR_LOOPBACK_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }
 169
 170 #define INET_ADDRSTRLEN 16
 171 #define INET6_ADDRSTRLEN 46
 172
 173 /* Get the definition of the macro to define the common sockaddr members.  */
 174 #include <bits/sockaddr.h>
 175
 176
 177 /* Structure describing an Internet socket address.  */
 178 struct sockaddr_in
 179   {
 180     __SOCKADDR_COMMON (sin_);
 181     uint16_t sin_port;                  /* Port number.  */
 182     struct in_addr sin_addr;            /* Internet address.  */
 183
 184     /* Pad to size of `struct sockaddr'.  */
 185     unsigned char sin_zero[sizeof (struct sockaddr) -
 186                            __SOCKADDR_COMMON_SIZE -
 187                            sizeof (uint16_t) -
 188                            sizeof (struct in_addr)];
 189   };
 190
 191 /* Ditto, for IPv6.  */
 192 struct sockaddr_in6
 193   {
 194     __SOCKADDR_COMMON (sin6_);
 195     uint16_t sin6_port;         /* Transport layer port # */
 196     uint32_t sin6_flowinfo;     /* IPv6 flow information */
 197     struct in6_addr sin6_addr;  /* IPv6 address */
 198   };
 199
 200 /* IPv6 multicast request.  */
 201 struct ipv6_mreq
 202   {
 203     /* IPv6 multicast address of group */
 204     struct in6_addr ipv6mr_multiaddr;
 205
 206     /* local interface */
 207     unsigned int ipv6mr_ifindex;
 208   };
 209
 210 /* Get system-specific definitions.  */
 211 #include <bits/in.h>
 212
 213 /* Functions to convert between host and network byte order.
 214
 215    Please note that these functions normally take `unsigned long int' or
 216    `unsigned short int' values as arguments and also return them.  But
 217    this was a short-sighted decision since on different systems the types
 218    may have different representations but the values are always the same.  */
 219
 220 extern uint32_t ntohl __P ((uint32_t __netlong));
 221 extern uint16_t ntohs __P ((uint16_t __netshort));
 222 extern uint32_t htonl __P ((uint32_t __hostlong));
 223 extern uint16_t htons __P ((uint16_t __hostshort));
 224
 225 #include <endian.h>
 226
 227 /* Get machine dependent optimized versions of byte swapping functions.  */
 228 #include <bits/byteswap.h>
 229
 230 #if __BYTE_ORDER == __BIG_ENDIAN && defined __OPTIMIZE__
 231 /* The host byte order is the same as network byte order,
 232    so these functions are all just identity.  */
 233 # define ntohl(x)       (x)
 234 # define ntohs(x)       (x)
 235 # define htonl(x)       (x)
 236 # define htons(x)       (x)
 237 #else
 238 # if __BYTE_ORDER == __LITTLE_ENDIAN && defined __OPTIMIZE__
 239 #  define ntohl(x)      __bswap_32 (x)
 240 #  define ntohs(x)      __bswap_16 (x)
 241 #  define htonl(x)      __bswap_32 (x)
 242 #  define htons(x)      __bswap_16 (x)
 243 # endif
 244 #endif
 245
 246 #define IN6_IS_ADDR_UNSPECIFIED(a) \
 247         ((((uint32_t *) (a))[0] == 0) && ((uint32_t *) (a))[1] == 0) && \
 248          (((uint32_t *) (a))[2] == 0) && ((uint32_t *) (a))[3] == 0))
 249
 250 #define IN6_IS_ADDR_LOOPBACK(a) \
 251         ((((uint32_t *) (a))[0] == 0) && ((uint32_t *) (a))[1] == 0) && \
 252          (((uint32_t *) (a))[2] == 0) && ((uint32_t *) (a))[3] == htonl (1)))
 253
 254 #define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t *) (a))[0] == 0xff)
 255
 256 #define IN6_IS_ADDR_LINKLOCAL(a) \
 257         ((((uint32_t *) (a))[0] & htonl (0xffc00000)) == htonl (0xfe800000))
 258
 259 #define IN6_IS_ADDR_SITELOCAL(a) \
 260         ((((uint32_t *) (a))[0] & htonl (0xffc00000)) == htonl (0xfec00000))
 261
 262 #define IN6_IS_ADDR_V4MAPPED(a) \
 263         ((((uint32_t *) (a))[0] == 0) && (((uint32_t *) (a))[1] == 0) && \
 264          (((uint32_t *) (a))[2] == htonl (0xffff)))
 265
 266 #define IN6_IS_ADDR_V4COMPAT(a) \
 267         ((((uint32_t *) (a))[0] == 0) && (((uint32_t *) (a))[1] == 0) && \
 268          (((uint32_t *) (a))[2] == 0) && (ntohl (((uint32_t *) (a))[3]) > 1))
 269
 270 #define IN6_ARE_ADDR_EQUAL(a,b) \
 271         ((((uint32_t *) (a))[0] == ((uint32_t *) (b))[0]) && \
 272          (((uint32_t *) (a))[1] == ((uint32_t *) (b))[2]) && \
 273          (((uint32_t *) (a))[2] == ((uint32_t *) (b))[1]) && \
 274          (((uint32_t *) (a))[3] == ((uint32_t *) (b))[3]))
 275
 276 /* Bind socket to a privileged IP port.  */
 277 extern int bindresvport __P ((int __sockfd, struct sockaddr_in *__sin));
 278
 279
 280 /* IPv6 packet information.  */
 281 struct in6_pktinfo
 282   {
 283     struct in6_addr     ipi6_addr;    /* src/dst IPv6 address */
 284     unsigned int        ipi6_ifindex; /* send/recv interface index */
 285   };
 286
 287 __END_DECLS
 288
 289 #endif  /* netinet/in.h */