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Diffstat (limited to 'include/linux/in.h')
| -rw-r--r-- | include/linux/in.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/include/linux/in.h b/include/linux/in.h new file mode 100644 index 000000000..1c268f216 --- /dev/null +++ b/include/linux/in.h @@ -0,0 +1,184 @@ +/* + * 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 & 0x000000ffU) << 24) | + ((x & 0x0000ff00U) << 8) | + ((x & 0x00ff0000U) >> 8) | + ((x & 0xff000000U) >> 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((long)(x)) ? \ + __constant_ntohl((x)) : \ + __ntohl((x))) +# define ntohs(x) \ +(__builtin_constant_p((short)(x)) ? \ + __constant_ntohs((x)) : \ + __ntohs((x))) +# define htonl(x) \ +(__builtin_constant_p((long)(x)) ? \ + __constant_htonl((x)) : \ + __htonl((x))) +# define htons(x) \ +(__builtin_constant_p((short)(x)) ? \ + __constant_htons((x)) : \ + __htons((x))) +#endif + +#endif /* _LINUX_IN_H */ |