include/linux/in.h

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 1 /*
 2  * INET An implementation of the TCP/IP protocol suite for the LINUX
 3  * operating system. INET is implemented using the BSD Socket
 4  * interface as the means of communication with the user level.
 5  *
 6  * Definitions of the Internet Protocol.
 7  *
 8  * Version: @(#)in.h 1.0.1 04/21/93
 9  *
 10  * Authors: Original taken from the GNU Project <netinet/in.h> file.
 11  * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 12  *
 13  * This program is free software; you can redistribute it and/or
 14  * modify it under the terms of the GNU General Public License
 15  * as published by the Free Software Foundation; either version
 16  * 2 of the License, or (at your option) any later version.
 17  */
 18 #ifndef _LINUX_IN_H
 19 #define _LINUX_IN_H
 20
 21 #include <linux/types.h>
 22
 23 /* Standard well-defined IP protocols. */
 24 enum{
 25  IPPROTO_IP =0,/* Dummy protocol for TCP */
 26  IPPROTO_ICMP =1,/* Internet Control Message Protocol */
 27  IPPROTO_IGMP =2,/* Internet Gateway Management Protocol */
 28  IPPROTO_IPIP =4,/* IPIP tunnels (older KA9Q tunnels use 94) */
 29  IPPROTO_TCP =6,/* Transmission Control Protocol */
 30  IPPROTO_EGP =8,/* Exterior Gateway Protocol */
 31  IPPROTO_PUP =12,/* PUP protocol */
 32  IPPROTO_UDP =17,/* User Datagram Protocol */
 33  IPPROTO_IDP =22,/* XNS IDP protocol */
 34
 35  IPPROTO_RAW =255,/* Raw IP packets */
 36  IPPROTO_MAX
 37 };
 38
 39
 40 /* Internet address. */
 41 struct in_addr {
 42  __u32 s_addr;
 43 };
 44
 45 /* Request struct for multicast socket ops */
 46
 47 struct ip_mreq
 48 {
 49 struct in_addr imr_multiaddr;/* IP multicast address of group */
 50 struct in_addr imr_interface;/* local IP address of interface */
 51 };
 52
 53
 54 /* Structure describing an Internet (IP) socket address. */
 55 #define __SOCK_SIZE__ 16/* sizeof(struct sockaddr) */
 56 struct sockaddr_in {
 57 short int sin_family;/* Address family */
 58 unsigned short int sin_port;/* Port number */
 59 struct in_addr sin_addr;/* Internet address */
 60
 61 /* Pad to size of `struct sockaddr'. */
 62 unsigned char __pad[__SOCK_SIZE__ -sizeof(short int) -
 63 sizeof(unsigned short int) -sizeof(struct in_addr)];
 64 };
 65 #define sin_zero __pad/* for BSD UNIX comp. -FvK */
 66
 67
 68 /*
 69  * Definitions of the bits in an Internet address integer.
 70  * On subnets, host and network parts are found according
 71  * to the subnet mask, not these masks.
 72  */
 73 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
 74 #define IN_CLASSA_NET 0xff000000
 75 #define IN_CLASSA_NSHIFT 24
 76 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
 77 #define IN_CLASSA_MAX 128
 78
 79 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
 80 #define IN_CLASSB_NET 0xffff0000
 81 #define IN_CLASSB_NSHIFT 16
 82 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
 83 #define IN_CLASSB_MAX 65536
 84
 85 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
 86 #define IN_CLASSC_NET 0xffffff00
 87 #define IN_CLASSC_NSHIFT 8
 88 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
 89
 90 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
 91 #define IN_MULTICAST(a) IN_CLASSD(a)
 92 #define IN_MULTICAST_NET 0xF0000000
 93
 94 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xe0000000) == 0xe0000000)
 95 #define IN_BADCLASS(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
 96
 97 /* Address to accept any incoming messages. */
 98 #define INADDR_ANY ((unsigned long int) 0x00000000)
 99
 100 /* Address to send to all hosts. */
 101 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
 102
 103 /* Address indicating an error return. */
 104 #define INADDR_NONE ((unsigned long int) 0xffffffff)
 105
 106 /* Network number for local host loopback. */
 107 #define IN_LOOPBACKNET 127
 108
 109 /* Address to loopback in software to local host. */
 110 #define INADDR_LOOPBACK 0x7f000001/* 127.0.0.1 */
 111 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
 112
 113 /* Defines for Multicast INADDR */
 114 #define INADDR_UNSPEC_GROUP 0xe0000000/* 224.0.0.0 */
 115 #define INADDR_ALLHOSTS_GROUP 0xe0000001/* 224.0.0.1 */
 116 #define INADDR_MAX_LOCAL_GROUP 0xe00000ff/* 224.0.0.255 */
 117
 118 /* <asm/byteorder.h> contains the htonl type stuff.. */
 119
 120 #include <asm/byteorder.h>
 121
 122 /* Some random defines to make it easier in the kernel.. */
 123 #ifdef __KERNEL__
 124
 125 #define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
 126 #define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
 127
 128 #endif
 129
 130 /*
 131  * IPv6 definitions as we start to include them. This is just
 132  * a beginning -- don't get excited 8)
 133  */
 134
 135 struct in_addr6
 136 {
 137 unsigned char s6_addr[16];
 138 };
 139
 140 struct sockaddr_in6
 141 {
 142 unsigned short sin6_family;
 143 unsigned short sin6_port;
 144 unsigned long sin6_flowinfo;
 145 struct in_addr6 sin6_addr;
 146 };
 147
 148
 149 #endif/* _LINUX_IN_H */