in.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/12/11 09:28:14 $
*  $Source: M:/psisrc/stack/incl/rcs/in.h $
*  $Revision: 1.23 $
**************************************************************************
*                         - Revision Log -                               *
* Who   When        Why
*
* FND   12/05/01    Added constructs for C++ compatability
*
* FND   10/02/02    Removed little endian macros for htonl, htons, ntohl
*                   and ntohs because they need to be functions. They
*                   won't always work in little endian.
*
**************************************************************************
*  File Description:  Constants and structures defined by the internet
*                     system, Per RFC 790, September 1981.
**************************************************************************/
#ifndef _IN_
#define _IN_

#include "config.h"
#include "ccdep.h"

#define IPPR_   IPPROTO_
#define IPO_    IPPORT_ 
#define IMPLNK_ IMPLINK_
#define INCLS   IN_CLASS
#define sockaddr_in in_sockaddr /* for certain implementations */


/* IP protocol codes */
#define IP_IP           0       /* Internet Protocol (for use with get/setsopt only) */
#define IP_ICMP         1       /* Internet Control Message Protocol */
#define IP_IGMP         2       /* Internet Group Management Protocol */
#define IP_GGP          3       /* Gateway-to-Gateway Protocol */
#define IP_TCP          6       /* Transaction Control Protocol */
#define IP_UDP          17      /* User Datagram Protocol */
#define IP_SNMP         57      /* Simple Network Management Protocol */
#define IP_OSPF         89      /* OSPF Protocol */

/* Port/socket numbers: network standard functions */
#define IPO_ECHO                7
#define IPO_DISCARD             9
#define IPO_SYSTAT              11
#define IPO_DAYTIME             13
#define IPO_NETSTAT             15
#define IPO_FTP                 21
#define IPO_TELNET              23
#define IPO_SMTP                25
#define IPO_TIMESERVER          37
#define IPO_NAMESERVER          42
#define IPO_WHOIS               43
#define IPO_MTP                 57
#define IPO_HTTP                80

/* Port/socket numbers: host specific functions */
#define IPO_TFTP                69
#define IPO_RJE                 77
#define IPO_FINGER              79
#define IPO_TTYLINK             87
#define IPO_SUPDUP              95

/* UNIX TCP sockets */
#define IPO_EXECSERVER          512
#define IPO_LOGINSERVER         513
#define IPO_CMDSERVER           514

/* UNIX UDP sockets */
#define IPO_BIFFUDP             512
#define IPO_WHOSERVER           513

/* Ports < IPO_RESERVED are reserved for
   privileged processes (e.g. root). */
#define IPO_RESERVED            1024

/* Link numbers */
#define IMPLNK_IP               155
#define IMPLNK_LOWEXPER         156
#define IMPLNK_HIGHEXPER        158

/* Internet address */
struct in_addr {
		u32 s_addr;
};

/* Macros for dealing with Class A/B/C network
   numbers.  High 3 bits of uppermost byte indicates
   how to interpret the remainder of the 32-bit
   Internet address.  The macros may be used in time
   time critical sections of code, while subroutine
   versions also exist use in other places. */

#define INCLSA       0x80000000L
#define INCLSA_NET   0xff000000L     /* 8 bits of net # */
#define INCLSA_LNA   0x00ffffffL
#define INCLSB       0x40000000L
#define INCLSB_NET   0xffff0000L     /* 16 bits of net # */
#define INCLSB_LNA   0x0000ffffL
#define INCLSC_NET   0xffffff00L     /* 24 bits of net # */
#define INCLSC_LNA   0x000000ffL

#define IN_NETOF(in) \
	(((in).s_addr&INCLSA) == 0 ? (in).s_addr&INCLSA_NET : \
		((in).s_addr&INCLSB) == 0 ? (in).s_addr&INCLSB_NET : \
			(in).s_addr&INCLSC_NET)
#define IN_LNAOF(in) \
	(((in).s_addr&INCLSA) == 0 ? (in).s_addr&INCLSA_LNA : \
		((in).s_addr&INCLSB) == 0 ? (in).s_addr&INCLSB_LNA : \
			(in).s_addr&INCLSC_LNA)

#ifndef INADDR_ANY
#define INADDR_ANY      0x00000000L
#endif

/* Socket address, internet style. */
struct in_sockaddr {
	i16     sin_family;
	u16     sin_port;
	struct  in_addr sin_addr;
	char    sin_zero[8];
};

/************************************************************************/
/* Function prototypes                                                  */
/************************************************************************/

#if defined(__cplusplus)
extern "C"{
#endif

extern u32   fns_inet_addr(const char * cp);
extern char *fns_inet_ntoa(struct in_addr in);
extern int  fns_inet_aton(register const char *name, struct in_addr *adrp );

#ifdef CPU_IS_LITTLE_ENDIAN
extern u16 htons(u16 val);
extern u16 ntohs(u16 val);
extern u32 htonl(u32 val);
extern u32 ntohl(u32 val);
#endif /* CPU_IS_LITTLE_ENDIAN */

#if defined(__cplusplus)
}
#endif

/************************************************************************
*                                                                       *
*     Aligned 16 Bit Host Byte Order to Network Byte Order Conversion   *
*                                                                       *
************************************************************************/
#ifndef htons
#ifdef CPU_IS_BIG_ENDIAN   /* big endian processor definition */
#define htons(val) (u16)(val)
#endif      /* CPU_IS_BIG_ENDIAN */
#endif      /* htons */


/************************************************************************
*                                                                       *
*   Aligned 16 Bit Network Byte Order To Host Byte Order Conversion     *
*                                                                       *
************************************************************************/
#ifndef ntohs
#ifdef CPU_IS_BIG_ENDIAN   /* big endian processor definition */
#define ntohs(val) (u16)(val)
#endif      /* CPU_IS_BIG_ENDIAN */
#endif      /* ntohs */

/************************************************************************
*                                                                       *
*     Aligned 32 Bit Host Byte Order to Network Byte Order Conversion   *
*                                                                       *
************************************************************************/
/*#ifndef htonl*/
#ifdef CPU_IS_BIG_ENDIAN   /* big endian processor definition */