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
  26 __BEGIN_DECLS
  27
  28 /* Standard well-defined IP protocols.  */
  29 enum
  30   {
  31     IPPROTO_IP = 0,     /* Dummy protocol for TCP.  */
  32     IPPROTO_ICMP = 1,   /* Internet Control Message Protocol.  */
  33     IPPROTO_IGMP = 2,   /* Internet Group Management Protocol. */
  34     IPPROTO_TCP = 6,    /* Transmission Control Protocol.  */
  35     IPPROTO_EGP = 8,    /* Exterior Gateway Protocol.  */
  36     IPPROTO_PUP = 12,   /* PUP protocol.  */
  37     IPPROTO_UDP = 17,   /* User Datagram Protocol.  */
  38     IPPROTO_IDP = 22,   /* XNS IDP protocol.  */
  39
  40     IPPROTO_RAW = 255,  /* Raw IP packets.  */
  41     IPPROTO_MAX
  42   };
  43
  44 /* Standard well-known ports.  */
  45 enum
  46   {
  47     IPPORT_ECHO = 7,            /* Echo service.  */
  48     IPPORT_DISCARD = 9,         /* Discard transmissions service.  */
  49     IPPORT_SYSTAT = 11,         /* System status service.  */
  50     IPPORT_DAYTIME = 13,        /* Time of day service.  */
  51     IPPORT_NETSTAT = 15,        /* Network status service.  */
  52     IPPORT_FTP = 21,            /* File Transfer Protocol.  */
  53     IPPORT_TELNET = 23,         /* Telnet protocol.  */
  54     IPPORT_SMTP = 25,           /* Simple Mail Transfer Protocol.  */
  55     IPPORT_TIMESERVER = 37,     /* Timeserver service.  */
  56     IPPORT_NAMESERVER = 42,     /* Domain Name Service.  */
  57     IPPORT_WHOIS = 43,          /* Internet Whois service.  */
  58     IPPORT_MTP = 57,
  59
  60     IPPORT_TFTP = 69,           /* Trivial File Transfer Protocol.  */
  61     IPPORT_RJE = 77,
  62     IPPORT_FINGER = 79,         /* Finger service.  */
  63     IPPORT_TTYLINK = 87,
  64     IPPORT_SUPDUP = 95,         /* SUPDUP protocol.  */
  65
  66
  67     IPPORT_EXECSERVER = 512,    /* execd service.  */
  68     IPPORT_LOGINSERVER = 513,   /* rlogind service.  */
  69     IPPORT_CMDSERVER = 514,
  70     IPPORT_EFSSERVER = 520,
  71
  72     /* UDP ports.  */
  73     IPPORT_BIFFUDP = 512,
  74     IPPORT_WHOSERVER = 513,
  75     IPPORT_ROUTESERVER = 520,
  76
  77     /* Ports less than this value are reserved for privileged processes.  */
  78     IPPORT_RESERVED = 1024,
  79
  80     /* Ports greater this value are reserved for (non-privileged) servers.  */
  81     IPPORT_USERRESERVED = 5000
  82   };
  83
  84
  85 /* Link numbers.  */
  86 #define IMPLINK_IP              155
  87 #define IMPLINK_LOWEXPER        156
  88 #define IMPLINK_HIGHEXPER       158
  89
  90
  91 /* Internet address.  */
  92 struct in_addr
  93   {
  94     unsigned int s_addr;
  95   };
  96
  97
  98 /* Definitions of the bits in an Internet address integer.
  99
 100    On subnets, host and network parts are found according to
 101    the subnet mask, not these masks.  */
 102
 103 #define IN_CLASSA(a)            ((((unsigned) (a)) & 0x80000000) == 0)
 104 #define IN_CLASSA_NET           0xff000000
 105 #define IN_CLASSA_NSHIFT        24
 106 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 107 #define IN_CLASSA_MAX           128
 108
 109 #define IN_CLASSB(a)            ((((unsigned) (a)) & 0xc0000000) == 0x80000000)
 110 #define IN_CLASSB_NET           0xffff0000
 111 #define IN_CLASSB_NSHIFT        16
 112 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 113 #define IN_CLASSB_MAX           65536
 114
 115 #define IN_CLASSC(a)            ((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
 116 #define IN_CLASSC_NET           0xffffff00
 117 #define IN_CLASSC_NSHIFT        8
 118 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 119
 120 #define IN_CLASSD(a)            ((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
 121 #define IN_MULTICAST(a)         IN_CLASSD(a)
 122
 123 #define IN_EXPERIMENTAL(a)      ((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
 124 #define IN_BADCLASS(a)          ((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
 125
 126 /* Address to accept any incoming messages.  */
 127 #define INADDR_ANY              ((unsigned) 0x00000000)
 128 /* Address to send to all hosts.  */
 129 #define INADDR_BROADCAST        ((unsigned) 0xffffffff)
 130 /* Address indicating an error return.  */
 131 #define INADDR_NONE             0xffffffff
 132
 133 /* Network number for local host loopback.  */
 134 #define IN_LOOPBACKNET  127
 135 /* Address to loopback in software to local host.  */
 136 #ifndef INADDR_LOOPBACK
 137 #define INADDR_LOOPBACK 0x7f000001      /* Internet address 127.0.0.1.  */
 138 #endif
 139
 140
 141 /* Get the definition of the macro to define the common sockaddr members.  */
 142 #include <sockaddrcom.h>
 143
 144
 145 /* Structure describing an Internet socket address.  */
 146 struct sockaddr_in
 147   {
 148     __SOCKADDR_COMMON (sin_);
 149     unsigned short int sin_port;        /* Port number.  */
 150     struct in_addr sin_addr;            /* Internet address.  */
 151
 152     /* Pad to size of `struct sockaddr'.  */
 153     unsigned char sin_zero[sizeof(struct sockaddr) -
 154                            __SOCKADDR_COMMON_SIZE -
 155                            sizeof(unsigned short int) -
 156                            sizeof(struct in_addr)];
 157   };
 158
 159
 160 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
 161    The first word in the comment at the right is the data type used;
 162    "bool" means a boolean value stored in an `int'.  */
 163 #define IP_OPTIONS      1       /* ip_opts; IP per-packet options.  */
 164 #define IP_HDRINCL      2       /* int; Header is included with data.  */
 165 #define IP_TOS          3       /* int; IP type of service and precedence.  */
 166 #define IP_TTL          4       /* int; IP time to live.  */
 167 #define IP_RECVOPTS     5       /* bool; Receive all IP options w/datagram.  */
 168 #define IP_RECVRETOPTS  6       /* bool; Receive IP options for response.  */
 169 #define IP_RECVDSTADDR  7       /* bool; Receive IP dst addr w/datagram.  */
 170 #define IP_RETOPTS      8       /* ip_opts; Set/get IP per-packet options.  */
 171 #define IP_MULTICAST_IF 9       /* in_addr; set/get IP multicast i/f */
 172 #define IP_MULTICAST_TTL 10     /* u_char; set/get IP multicast ttl */
 173 #define IP_MULTICAST_LOOP 11    /* i_char; set/get IP multicast loopback */
 174 #define IP_ADD_MEMBERSHIP 12    /* ip_mreq; add an IP group membership */
 175 #define IP_DROP_MEMBERSHIP 13   /* ip_mreq; drop an IP group membership */
 176
 177 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
 178    The `ip_dst' field is used for the first-hop gateway when using a
 179    source route (this gets put into the header proper).  */
 180 struct ip_opts
 181   {
 182     struct in_addr ip_dst;      /* First hop; zero without source route.  */
 183     char ip_opts[40];           /* Actually variable in size.  */
 184   };
 185
 186 /* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
 187 struct ip_mreq
 188 {
 189   struct in_addr imr_multiaddr; /* IP multicast address of group */
 190   struct in_addr imr_interface; /* local IP address of interface */
 191 };
 192
 193 /* Functions to convert between host and network byte order.
 194
 195    Please note that these functions normally take `unsigned long int' or
 196    `unsigned short int' values as arguments and also return them.  But
 197    this was a short-sighted decision since on different systems the types
 198    may have different representations but the values are always the same.  */
 199
 200 extern u_int32_t ntohl __P ((u_int32_t __netlong));
 201 extern u_int16_t ntohs __P ((u_int16_t __netshort));
 202 extern u_int32_t htonl __P ((u_int32_t __hostlong));
 203 extern u_int16_t htons __P ((u_int16_t __hostshort));
 204
 205 #include <endian.h>
 206
 207 #if __BYTE_ORDER == __BIG_ENDIAN
 208 /* The host byte order is the same as network byte order,
 209    so these functions are all just identity.  */
 210 #define ntohl(x)        (x)
 211 #define ntohs(x)        (x)
 212 #define htonl(x)        (x)
 213 #define htons(x)        (x)
 214 #endif
 215
 216 __END_DECLS
 217
 218 #endif  /* netinet/in.h */