sysdeps/unix/sysv/linux/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
  27 /* Standard well-defined IP protocols.  */
  28 enum
  29   {
  30     IPPROTO_IP = 0,     /* Dummy protocol for TCP.  */
  31     IPPROTO_ICMP = 1,   /* Internet Control Message Protocol.  */
  32     IPPROTO_IGMP = 2,   /* Internet Group Management Protocol. */
  33     IPPROTO_IPIP = 4,   /* IPIP tunnels (older KA9Q tunnels use 94).  */
  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 /* Internet address.  */
  86 struct in_addr
  87   {
  88     unsigned int s_addr;
  89   };
  90
  91
  92 /* Definitions of the bits in an Internet address integer.
  93
  94    On subnets, host and network parts are found according to
  95    the subnet mask, not these masks.  */
  96
  97 #define IN_CLASSA(a)            ((((unsigned) (a)) & 0x80000000) == 0)
  98 #define IN_CLASSA_NET           0xff000000
  99 #define IN_CLASSA_NSHIFT        24
 100 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 101 #define IN_CLASSA_MAX           128
 102
 103 #define IN_CLASSB(a)            ((((unsigned) (a)) & 0xc0000000) == 0x80000000)
 104 #define IN_CLASSB_NET           0xffff0000
 105 #define IN_CLASSB_NSHIFT        16
 106 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 107 #define IN_CLASSB_MAX           65536
 108
 109 #define IN_CLASSC(a)            ((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
 110 #define IN_CLASSC_NET           0xffffff00
 111 #define IN_CLASSC_NSHIFT        8
 112 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 113
 114 #define IN_CLASSD(a)            ((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
 115 #define IN_MULTICAST(a)         IN_CLASSD(a)
 116
 117 #define IN_EXPERIMENTAL(a)      ((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
 118 #define IN_BADCLASS(a)          ((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
 119
 120 /* Address to accept any incoming messages.  */
 121 #define INADDR_ANY              ((unsigned) 0x00000000)
 122 /* Address to send to all hosts.  */
 123 #define INADDR_BROADCAST        ((unsigned) 0xffffffff)
 124 /* Address indicating an error return.  */
 125 #define INADDR_NONE             0xffffffff
 126
 127 /* Network number for local host loopback.  */
 128 #define IN_LOOPBACKNET  127
 129 /* Address to loopback in software to local host.  */
 130 #ifndef INADDR_LOOPBACK
 131 #define INADDR_LOOPBACK 0x7f000001      /* Internet address 127.0.0.1.  */
 132 #endif
 133
 134
 135 /* Get the definition of the macro to define the common sockaddr members.  */
 136 #include <sockaddrcom.h>
 137
 138
 139 /* Structure describing an Internet socket address.  */
 140 struct sockaddr_in
 141   {
 142     __SOCKADDR_COMMON (sin_);
 143     unsigned short int sin_port;        /* Port number.  */
 144     struct in_addr sin_addr;            /* Internet address.  */
 145
 146     /* Pad to size of `struct sockaddr'.  */
 147     unsigned char sin_zero[sizeof(struct sockaddr) -
 148                            __SOCKADDR_COMMON_SIZE -
 149                            sizeof(unsigned short int) -
 150                            sizeof(struct in_addr)];
 151   };
 152
 153
 154 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
 155    The first word in the comment at the right is the data type used;
 156    "bool" means a boolean value stored in an `int'.  */
 157 #define IP_TOS             1    /* int; IP type of service and precedence.  */
 158 #define IP_TTL             2    /* int; IP time to live.  */
 159 #define IP_HDRINCL         3    /* int; Header is included with data.  */
 160 #define IP_OPTIONS         4    /* ip_opts; IP per-packet options.  */
 161 #define IP_MULTICAST_IF    32   /* in_addr; set/get IP multicast i/f */
 162 #define IP_MULTICAST_TTL   33   /* u_char; set/get IP multicast ttl */
 163 #define IP_MULTICAST_LOOP  34   /* i_char; set/get IP multicast loopback */
 164 #define IP_ADD_MEMBERSHIP  35   /* ip_mreq; add an IP group membership */
 165 #define IP_DROP_MEMBERSHIP 36   /* ip_mreq; drop an IP group membership */
 166
 167 /* To select the IP level.  */
 168 #define SOL_IP  0
 169
 170 /* Structure used to describe IP options for IP_OPTIONS. The `ip_dst'
 171    field is used for the first-hop gateway when using a source route
 172    (this gets put into the header proper).  */
 173 struct ip_opts
 174   {
 175     struct in_addr ip_dst;      /* First hop; zero without source route.  */
 176     char ip_opts[40];           /* Actually variable in size.  */
 177   };
 178
 179 /* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
 180 struct ip_mreq
 181   {
 182     struct in_addr imr_multiaddr;       /* IP multicast address of group */
 183     struct in_addr imr_interface;       /* local IP address of interface */
 184   };
 185
 186 /* Functions to convert between host and network byte order.  */
 187
 188 extern unsigned long int ntohl __P ((unsigned long int));
 189 extern unsigned short int ntohs __P ((unsigned short int));
 190 extern unsigned long int htonl __P ((unsigned long int));
 191 extern unsigned short int htons __P ((unsigned short int));
 192
 193 #include <endian.h>
 194
 195 #if __BYTE_ORDER == __BIG_ENDIAN
 196 /* The host byte order is the same as network byte order,
 197    so these functions are all just identity.  */
 198 #define ntohl(x)        (x)
 199 #define ntohs(x)        (x)
 200 #define htonl(x)        (x)
 201 #define htons(x)        (x)
 202 #endif
 203
 204 #endif  /* netinet/in.h */