inet/netinet/in.h

   1 /* Copyright (C) 1991, 1992, 1993, 1994, 1995 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 General Public License
  15 along with the GNU C Library; see the file COPYING.  If not, write to
  16 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #ifndef _NETINET_IN_H
  19
  20 #define _NETINET_IN_H   1
  21 #include <features.h>
  22
  23 #include <sys/socket.h>
  24
  25
  26 /* Standard well-defined IP protocols.  */
  27 enum
  28   {
  29     IPPROTO_IP = 0,     /* Dummy protocol for TCP.  */
  30     IPPROTO_ICMP = 1,   /* Internet Control Message Protocol.  */
  31     IPPROTO_IGMP = 2,   /* Internet Group Management Protocol. */
  32     IPPROTO_TCP = 6,    /* Transmission Control Protocol.  */
  33     IPPROTO_EGP = 8,    /* Exterior Gateway Protocol.  */
  34     IPPROTO_PUP = 12,   /* PUP protocol.  */
  35     IPPROTO_UDP = 17,   /* User Datagram Protocol.  */
  36     IPPROTO_IDP = 22,   /* XNS IDP protocol.  */
  37
  38     IPPROTO_RAW = 255,  /* Raw IP packets.  */
  39     IPPROTO_MAX,
  40   };
  41
  42 /* Standard well-known ports.  */
  43 enum
  44   {
  45     IPPORT_ECHO = 7,            /* Echo service.  */
  46     IPPORT_DISCARD = 9,         /* Discard transmissions service.  */
  47     IPPORT_SYSTAT = 11,         /* System status service.  */
  48     IPPORT_DAYTIME = 13,        /* Time of day service.  */
  49     IPPORT_NETSTAT = 15,        /* Network status service.  */
  50     IPPORT_FTP = 21,            /* File Transfer Protocol.  */
  51     IPPORT_TELNET = 23,         /* Telnet protocol.  */
  52     IPPORT_SMTP = 25,           /* Simple Mail Transfer Protocol.  */
  53     IPPORT_TIMESERVER = 37,     /* Timeserver service.  */
  54     IPPORT_NAMESERVER = 42,     /* Domain Name Service.  */
  55     IPPORT_WHOIS = 43,          /* Internet Whois service.  */
  56     IPPORT_MTP = 57,
  57
  58     IPPORT_TFTP = 69,           /* Trivial File Transfer Protocol.  */
  59     IPPORT_RJE = 77,
  60     IPPORT_FINGER = 79,         /* Finger service.  */
  61     IPPORT_TTYLINK = 87,
  62     IPPORT_SUPDUP = 95,         /* SUPDUP protocol.  */
  63
  64
  65     IPPORT_EXECSERVER = 512,    /* execd service.  */
  66     IPPORT_LOGINSERVER = 513,   /* rlogind service.  */
  67     IPPORT_CMDSERVER = 514,
  68     IPPORT_EFSSERVER = 520,
  69
  70     /* UDP ports.  */
  71     IPPORT_BIFFUDP = 512,
  72     IPPORT_WHOSERVER = 513,
  73     IPPORT_ROUTESERVER = 520,
  74
  75     /* Ports less than this value are reserved for privileged processes.  */
  76     IPPORT_RESERVED = 1024,
  77
  78     /* Ports greater this value are reserved for (non-privileged) servers.  */
  79     IPPORT_USERRESERVED = 5000,
  80   };
  81
  82
  83 /* Link numbers.  */
  84 #define IMPLINK_IP              155
  85 #define IMPLINK_LOWEXPER        156
  86 #define IMPLINK_HIGHEXPER       158
  87
  88
  89 /* Internet address.  */
  90 struct in_addr
  91   {
  92     unsigned long int s_addr;
  93   };
  94
  95
  96 /* Definitions of the bits in an Internet address integer.
  97
  98    On subnets, host and network parts are found according to
  99    the subnet mask, not these masks.  */
 100
 101 #define IN_CLASSA(a)            ((((long int) (a)) & 0x80000000) == 0)
 102 #define IN_CLASSA_NET           0xff000000
 103 #define IN_CLASSA_NSHIFT        24
 104 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 105 #define IN_CLASSA_MAX           128
 106
 107 #define IN_CLASSB(a)            ((((long int) (a)) & 0xc0000000) == 0x80000000)
 108 #define IN_CLASSB_NET           0xffff0000
 109 #define IN_CLASSB_NSHIFT        16
 110 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 111 #define IN_CLASSB_MAX           65536
 112
 113 #define IN_CLASSC(a)            ((((long int) (a)) & 0xc0000000) == 0xc0000000)
 114 #define IN_CLASSC_NET           0xffffff00
 115 #define IN_CLASSC_NSHIFT        8
 116 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 117
 118 #define IN_CLASSD(a)            ((((long int) (a)) & 0xf0000000) == 0xe0000000)
 119 #define IN_MULTICAST(a)         IN_CLASSD(a)
 120
 121 #define IN_EXPERIMENTAL(a)      ((((long int) (a)) & 0xe0000000) == 0xe0000000)
 122 #define IN_BADCLASS(a)          ((((long int) (a)) & 0xf0000000) == 0xf0000000)
 123
 124 /* Address to accept any incoming messages.  */
 125 #define INADDR_ANY              ((unsigned long int) 0x00000000)
 126 /* Address to send to all hosts.  */
 127 #define INADDR_BROADCAST        ((unsigned long int) 0xffffffff)
 128 /* Address indicating an error return.  */
 129 #define INADDR_NONE             0xffffffff
 130
 131 /* Network number for local host loopback.  */
 132 #define IN_LOOPBACKNET  127
 133 /* Address to loopback in software to local host.  */
 134 #ifndef INADDR_LOOPBACK
 135 #define INADDR_LOOPBACK 0x7f000001      /* Internet address 127.0.0.1.  */
 136 #endif
 137
 138
 139 /* Get the definition of the macro to define the common sockaddr members.  */
 140 #include <sockaddrcom.h>
 141
 142
 143 /* Structure describing an Internet socket address.  */
 144 struct sockaddr_in
 145   {
 146     __SOCKADDR_COMMON (sin_);
 147     unsigned short int sin_port;        /* Port number.  */
 148     struct in_addr sin_addr;            /* Internet address.  */
 149
 150     /* Pad to size of `struct sockaddr'.  */
 151     unsigned char sin_zero[sizeof(struct sockaddr) -
 152                            __SOCKADDR_COMMON_SIZE -
 153                            sizeof(unsigned short int) -
 154                            sizeof(struct in_addr)];
 155   };
 156
 157
 158 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
 159    The first word in the comment at the right is the data type used;
 160    "bool" means a boolean value stored in an `int'.  */
 161 #define IP_OPTIONS      1       /* ip_opts; IP per-packet options.  */
 162 #define IP_HDRINCL      2       /* int; Header is included with data.  */
 163 #define IP_TOS          3       /* int; IP type of service and precedence.  */
 164 #define IP_TTL          4       /* int; IP time to live.  */
 165 #define IP_RECVOPTS     5       /* bool; Receive all IP options w/datagram.  */
 166 #define IP_RECVRETOPTS  6       /* bool; Receive IP options for response.  */
 167 #define IP_RECVDSTADDR  7       /* bool; Receive IP dst addr w/datagram.  */
 168 #define IP_RETOPTS      8       /* ip_opts; Set/get IP per-packet options.  */
 169 #define IP_MULTICAST_IF 9       /* in_addr; set/get IP multicast i/f */
 170 #define IP_MULTICAST_TTL 10     /* u_char; set/get IP multicast ttl */
 171 #define IP_MULTICAST_LOOP 11    /* i_char; set/get IP multicast loopback */
 172 #define IP_ADD_MEMBERSHIP 12    /* ip_mreq; add an IP group membership */
 173 #define IP_DROP_MEMBERSHIP 13   /* ip_mreq; drop an IP group membership */
 174
 175 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
 176    The `ip_dst' field is used for the first-hop gateway when using a
 177    source route (this gets put into the header proper).  */
 178 struct ip_opts
 179   {
 180     struct in_addr ip_dst;      /* First hop; zero without source route.  */
 181     char ip_opts[40];           /* Actually variable in size.  */
 182   };
 183
 184 /* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
 185 struct ip_mreq
 186 {
 187   struct in_addr imr_multiaddr; /* IP multicast address of group */
 188   struct in_addr imr_interface; /* local IP address of interface */
 189 };
 190
 191 /* Functions to convert between host and network byte order.  */
 192
 193 extern unsigned long int ntohl __P ((unsigned long int));
 194 extern unsigned short int ntohs __P ((unsigned short int));
 195 extern unsigned long int htonl __P ((unsigned long int));
 196 extern unsigned short int htons __P ((unsigned short int));
 197
 198 #include <endian.h>
 199
 200 #if __BYTE_ORDER == __BIG_ENDIAN
 201 /* The host byte order is the same as network byte order,
 202    so these functions are all just identity.  */
 203 #define ntohl(x)        (x)
 204 #define ntohs(x)        (x)
 205 #define htonl(x)        (x)
 206 #define htons(x)        (x)
 207 #endif
 208
 209 #endif  /* netinet/in.h */