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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions of the Internet Protocol. * * Version: @(#)in.h 1.0.1 04/21/93 * * Authors: Original taken from the GNU Project <netinet/in.h> file. * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _LINUX_IN_H #define _LINUX_IN_H /* Standard well-defined IP protocols. */ enum { IPPROTO_IP = 0, /* Dummy protocol for TCP */ IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ IPPROTO_GGP = 2, /* Gateway Protocol (deprecated) */ IPPROTO_TCP = 6, /* Transmission Control Protocol */ IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ IPPROTO_PUP = 12, /* PUP protocol */ IPPROTO_UDP = 17, /* User Datagram Protocol */ IPPROTO_IDP = 22, /* XNS IDP protocol */ IPPROTO_RAW = 255, /* Raw IP packets */ IPPROTO_MAX }; /* Internet address. */ struct in_addr { unsigned long int s_addr; }; /* Structure describing an Internet (IP) socket address. */ #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ struct sockaddr_in { short int sin_family; /* Address family */ unsigned short int sin_port; /* Port number */ struct in_addr sin_addr; /* Internet address */ /* Pad to size of `struct sockaddr'. */ unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - sizeof(unsigned short int) - sizeof(struct in_addr)]; }; #define sin_zero __pad /* for BSD UNIX comp. -FvK */ /* * Definitions of the bits in an Internet address integer. * On subnets, host and network parts are found according * to the subnet mask, not these masks. */ #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) #define IN_CLASSA_NET 0xff000000 #define IN_CLASSA_NSHIFT 24 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) #define IN_CLASSA_MAX 128 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) #define IN_CLASSB_NET 0xffff0000 #define IN_CLASSB_NSHIFT 16 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) #define IN_CLASSB_MAX 65536 #define IN_CLASSC(a) ((((long int) (a)) & 0xc0000000) == 0xc0000000) #define IN_CLASSC_NET 0xffffff00 #define IN_CLASSC_NSHIFT 8 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) #define IN_MULTICAST(a) IN_CLASSD(a) #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xe0000000) == 0xe0000000) #define IN_BADCLASS(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) /* Address to accept any incoming messages. */ #define INADDR_ANY ((unsigned long int) 0x00000000) /* Address to send to all hosts. */ #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) /* Address indicating an error return. */ #define INADDR_NONE 0xffffffff /* Network number for local host loopback. */ #define IN_LOOPBACKNET 127 /* Address to loopback in software to local host. */ #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ /* * Options for use with `getsockopt' and `setsockopt' at * the IP level. LINUX does not yet have the IP_OPTIONS * option (grin), so we undefine it for now.- HJ && FvK */ #if 0 # define IP_OPTIONS 1 /* IP per-packet options */ #endif #define IP_HDRINCL 2 /* raw packet header option */ /* Linux Internet number representation function declarations. */ #undef ntohl #undef ntohs #undef htonl #undef htons extern unsigned long int ntohl(unsigned long int); extern unsigned short int ntohs(unsigned short int); extern unsigned long int htonl(unsigned long int); extern unsigned short int htons(unsigned short int); static __inline__ unsigned long int __ntohl(unsigned long int x) { __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ "rorl $16,%0\n\t" /* swap words */ "xchgb %b0,%h0" /* swap higher bytes */ :"=q" (x) : "0" (x)); return x; } static __inline__ unsigned long int __constant_ntohl(unsigned long int x) { return (((x & 0x000000ff) << 24) | ((x & 0x0000ff00) << 8) | ((x & 0x00ff0000) >> 8) | ((x & 0xff000000) >> 24)); } static __inline__ unsigned short int __ntohs(unsigned short int x) { __asm__("xchgb %b0,%h0" /* swap bytes */ : "=q" (x) : "0" (x)); return x; } static __inline__ unsigned short int __constant_ntohs(unsigned short int x) { return (((x & 0x00ff) << 8) | ((x & 0xff00) >> 8)); } #define __htonl(x) __ntohl(x) #define __htons(x) __ntohs(x) #define __constant_htonl(x) __constant_ntohl(x) #define __constant_htons(x) __constant_ntohs(x) #ifdef __OPTIMIZE__ # define ntohl(x) \ (__builtin_constant_p((x)) ? \ __constant_ntohl((x)) : \ __ntohl((x))) # define ntohs(x) \ (__builtin_constant_p((x)) ? \ __constant_ntohs((x)) : \ __ntohs((x))) # define htonl(x) \ (__builtin_constant_p((x)) ? \ __constant_htonl((x)) : \ __htonl((x))) # define htons(x) \ (__builtin_constant_p((x)) ? \ __constant_htons((x)) : \ __htons((x))) #endif #endif /* _LINUX_IN_H */ |