System Dependencies

/*
**	(c) COPYRIGHT CERN 1994.
**	Please first read the full copyright statement in the file COPYRIGH.
*/

System-system differences for TCP include files and macros. This file includes for each system the files necessary for network and file I/O.

This module is a part of the Library of Common Code.

Authors

TBL: Tim Berners-Lee, W3 project, CERN, <timbl@info.cern.ch>
EvA: Eelco van Asperen <evas@cs.few.eur.nl>
MA: Marc Andreesen NCSA
MD: Mark Donszelmann <duns@vxcern.cern.ch>
AT: Aleksandar Totic <atotic@ncsa.uiuc.edu>
SCW: Susan C. Weber <sweber@kyle.eitech.com>
HF: Henrik Frystyk, <frystyk@dxcern.cern.ch>

History:

22 Feb 91: Written (TBL) as part of the WWW library.
16 Jan 92: PC code from (EvA)
22 Apr 93: Merged diffs bits from xmosaic release
29 Apr 93: Windows/NT code from (SCW)
29 Sep 93: VMS fixes (MD)

#ifndef TCP_H
#define TCP_H

NOTE: All system include files must be in < > as Windows compilers otherwise get confused.

Default values

These values may be reset and altered by system-specific sections later on. There is also a bunch of defaults at the end and a section for ordinary BSD unix versions.

#define SELECT			/* Can handle >1 channel */
#define GOT_SYSTEM		/* Can call shell with string */
#define GOT_PASSWD		/* Can we use getpass() command */

Platform Specific Stuff

Information below this line is specific for most platforms. See also General Stuff

Macintosh - Think-C

Think-C is one development environment on the Mac.

We recommend that you compile with 4-byte ints to be compatible with MPW C. We used Tom Milligan's s_socket library which was written for 4 byte int, and the MacTCP library assumes 4-byte int.

#ifdef THINK_C
#undef GOT_SYSTEM
#define DEBUG			/* Can't put it on the CC command line	*/
#define NO_UNIX_IO		/* getuid() missing			*/
#define NO_GETPID		/* getpid() does not exist 		*/
#define NO_GETWD		/* getwd() does not exist 		*/

#define NETCLOSE s_close    /* Routine to close a TCP-IP socket		*/
#define NETREAD  s_read	    /* Routine to read from a TCP-IP socket	*/
#define NETWRITE s_write    /* Routine to write to a TCP-IP socket	*/

#define bind s_bind	    /* Funny names presumably to prevent clashes */
#define connect s_connect
#define accept s_accept
#define listen s_listen
#define socket s_socket
#define getsockname s_getsockname

/* The function prototype checking is better than the include files */

extern s_close(int s);
extern s_read(int s, char *buffer, int buflen);
extern s_write(int s, const char *buffer, int buflen);

extern bind(int s, struct sockaddr *name, int namelen);
extern accept(int s, struct sockaddr *addr, int *addrlen);
extern listen(int s, int qlen);
extern connect(int s, struct sockaddr *addr, int addrlen);

extern s_socket(int domain, int type, int protocol);
extern s_getsockname(int s, struct sockaddr *name, int *namelen);
extern struct hostent *gethostent(const char * name);
extern unsigned long inet_addr(const char * name);
#endif /* THINK_C */

Macintosh - MPW

MPW is one development environment on the Mac.

This entry was created by Aleksandar Totic (atotic@ncsa.uiuc.edu) this file is compatible with sockets package released by NCSA. One major conflict is that this library redefines write/read/etc as macros. In some of HTML code these macros get executed when they should not be. Such files should define NO_SOCKET_DEFS on top. This is a temporary hack.

#ifdef applec			/* MPW  */
#undef GOT_SYSTEM
#define DEBUG			/* Can't put it on the CC command line */

#define NO_UNIX_IO		/* getuid() missing */
#define NO_GETPID		/* getpid() does not exist */
#define NO_GETWD		/* getwd() does not exist */

#define NETCLOSE s_close    /* Routine to close a TCP-IP socket */
#define NETREAD  s_read	    /* Routine to read from a TCP-IP socket */
#define NETWRITE s_write    /* Routine to write to a TCP-IP socket */

#define _ANSI_SOURCE
#define GUI
#define LINEFEED 10
#define ANON_FTP_HOSTNAME
#ifndef NO_SOCKET_DEFS
#include <MacSockDefs.h>
#endif /* NO_SOCKET_DEFS */

#include <socket.ext.h>
#include <string.h>

#endif /* applec MPW */

Big Blue - the world of incompatibility

IBM RS600On the IBM RS-6000, AIX is almost Unix.

#ifdef _AIX
#define AIX
#endif
#ifdef AIX
#define unix
#endif

/*    AIX 3.2
**    -------
*/

#ifdef _IBMR2
#define USE_DIRENT		/* sys V style directory open */
#endif

IBM VM-CMS, VM-XA Mainframes

MVS is compiled as for VM. MVS has no unix-style I/O. The command line compile options seem to come across in lower case.

#ifdef mvs
#define MVS
#endif

#ifdef MVS
#define VM
#endif

#ifdef NEWLIB
#pragma linkage(newlib,OS)	/* Enables recursive NEWLIB */
#endif

/*	VM doesn't have a built-in predefined token, so we cheat: */
#ifndef VM
#include <string.h>		/* For bzero etc - not  VM */
#endif

/*	Note:	All include file names must have 8 chars max (+".h")
**
**	Under VM, compile with "(DEF=VM,SHORT_NAMES,DEBUG)"
**
**	Under MVS, compile with "NOMAR DEF(MVS)" to get rid of 72 char margin
**	  System include files TCPIP and COMMMAC neeed line number removal(!)
*/

#ifdef VM			/* or MVS -- see above. */
#define GOT_PIPE		/* Of sorts */
#define NOT_ASCII		/* char type is not ASCII */
#define NO_UNIX_IO		/* Unix I/O routines are not supported */
#define NO_GETPID		/* getpid() does not exist */
#define NO_GETWD		/* getwd() does not exist */
#ifndef SHORT_NAMES
#define SHORT_NAMES		/* 8 character uniqueness for globals */
#endif
#include <manifest.h>
#include <bsdtypes.h>
#include <stdefs.h>
#include <socket.h>
#include <in.h>
#include <inet.h>
#include <netdb.h>
#include <errno.h>	    /* independent */
extern char asciitoebcdic[], ebcdictoascii[];
#define TOASCII(c)   (c=='\n' ?  10  : ebcdictoascii[c])
#define FROMASCII(c) (c== 10  ? '\n' : asciitoebcdic[c])
#include <bsdtime.h>
#include <time.h>
#include <string.h>
#define INCLUDES_DONE
#define TCP_INCLUDES_DONE
#endif

IBM-PC running MS-DOS with SunNFS for TCP/IP

This code thanks to Eelco van Asperen <evas@cs.few.eur.nl>

#ifdef PCNFS
#include <sys/types.h>
#include <string.h>
#include <errno.h>	    /* independent */
#include <sys/time.h>	    /* independent */
#include <sys/stat.h>
#include <fcntl.h>	    /* In place of sys/param and sys/file */
#define INCLUDES_DONE
#define FD_SET(fd,pmask) (*(unsigned*)(pmask)) |=  (1<<(fd))
#define FD_CLR(fd,pmask) (*(unsigned*)(pmask)) &= ~(1<<(fd))
#define FD_ZERO(pmask)   (*(unsigned*)(pmask))=0
#define FD_ISSET(fd,pmask) (*(unsigned*)(pmask) & (1<<(fd)))
#define NO_GROUPS
#endif  /* PCNFS */

PC running Windows

Help provided by Susan C. Weber <sweber@kyle.eitech.com>, Paul Hounslow , and a lot of other PC people.

#ifdef _WINDOWS
#include <windows.h>
#include <fcntl.h>
#include <sys\types.h>
#include <sys\stat.h>

#define NETREAD(s,b,l)  recv((s),(b),(l),0)
#define NETWRITE(s,b,l) send((s),(b),(l),0)
#define NETCLOSE(s)     closesocket(s)
#define IOCTL(s,c,a)	ioctlsocket(s,c, (long *) a)

#include <io.h>
#include <string.h>
#include <process.h>
#include <time.h>
#include <direct.h>
#include <stdio.h>
#include <stdlib.h>
#include <winsock.h>

#ifdef _WINDLL
#define NO_STDIO				/* If we are making a DLL */
#endif

#define NO_PASSWD
#define NO_GETWD
#define HAS_GETCWD
#define NO_GETPASSWD
#define NO_GETDOMAINNAME

#define INCLUDES_DONE
#define TCP_INCLUDES_DONE

#define SOCKFD SOCKET			/* WinSocks socket descriptor */
#define INVSOC INVALID_SOCKET		/* WinSocks invalid socket */

#define DESIRED_WINSOCK_VERSION	0x0101  /* we'd like winsock ver 1.1... */
#define MINIMUM_WINSOCK_VERSION	0x0101  /* ...but we'll take ver 1.1 :) */

File Access

These next defintions are because the UNIX stuff is not supplied with BC4 (Paul Hounslow

#define NO_UNIX_IO

typedef unsigned long mode_t;

#define	_IFMT		0170000	/* type of file */
#define		_IFDIR	0040000	/* directory */
#define		_IFCHR	0020000	/* character special */
#define		_IFBLK	0060000	/* block special */
#define		_IFREG	0100000	/* regular */
#define		_IFLNK	0120000	/* symbolic link */
#define		_IFSOCK	0140000	/* socket */
#define		_IFIFO	0010000	/* fifo */

#define	S_ISUID		0004000	/* set user id on execution */
#define	S_ISGID		0002000	/* set group id on execution */
#define	S_ISVTX		0001000	/* save swapped text even after use */

#ifdef S_IREAD
#undef S_IREAD
#define	S_IREAD		0000400	/* read permission, owner */
#endif

#ifdef S_IWRITE
#undef S_IWRITE
#define	S_IWRITE 	0000200	/* write permission, owner */
#endif

#ifdef S_IEXEC
#undef S_IEXEC
#define	S_IEXEC		0000100	/* execute/search permission, owner */
#endif

#define	S_ENFMT 	0002000	/* enforcement-mode locking */

#ifdef S_IFMT
#undef S_IFMT
#define	S_IFMT		_IFMT
#endif

#ifdef S_IDIR
#undef S_IDIR
#define	S_IFDIR		_IFDIR
#endif

#ifdef S_IFCHR
#undef S_IFCHR
#define	S_IFCHR		_IFCHR
#endif

#ifdef S_IBLK
#undef S_IBLK
#define	S_IFBLK		_IFBLK
#endif

#ifdef S_IREG
#undef S_IREG
#define	S_IFREG		_IFREG
#endif

#define	S_IFLNK		_IFLNK

#ifdef S_IFIFO
#undef S_IFIFO
#define	S_IFIFO		_IFIFO
#endif

#define	S_IRWXU 	0000700	/* rwx, owner */
#define		S_IRUSR	0000400	/* read permission, owner */
#define		S_IWUSR	0000200	/* write permission, owner */
#define		S_IXUSR	0000100	/* execute/search permission, owner */
#define	S_IRWXG		0000070	/* rwx, group */
#define		S_IRGRP	0000040	/* read permission, group */
#define		S_IWGRP	0000020	/* write permission, grougroup */
#define		S_IXGRP	0000010	/* execute/search permission, group */
#define	S_IRWXO		0000007	/* rwx, other */
#define		S_IROTH	0000004	/* read permission, other */
#define		S_IWOTH	0000002	/* write permission, other */
#define		S_IXOTH	0000001	/* execute/search permission, other */

#define	S_ISREG(m)	(((m)&_IFMT) == _IFREG)

Errno and Return Codes

Winsock has its own errno codes and it returns them through WSAGetLastError(). However, it does also support BSD error codes, so we make a compromise.

/* extern int errno; */
#define socerrno WSAGetLastError()
#define ERRNO_DONE

Return code for socket functions. We can't use -1 as return value


#endif  /* WINDOWS */

VAX/VMS

Under VMS, there are many versions of TCP-IP. Define one if you do not use Digital's UCX product:

UCX: DEC's "Ultrix connection" (default)
WIN_TCP: From Wollongong, now GEC software.
MULTINET: From SRI, now from TGV Inv.
DECNET: Cern's TCP socket emulation over DECnet

The last three do not interfere with the unix i/o library, and so they need special calls to read, write and close sockets. In these cases the socket number is a VMS channel number, so we make the @@@ HORRIBLE @@@ assumption that a channel number will be greater than 10 but a unix file descriptor less than 10. It works.

#ifdef VMS 
#define CACHE_FILE_PREFIX  "SYS$LOGIN:Z_"

#ifdef WIN_TCP
#undef NETREAD
#undef NETWRITE
#undef NETCLOSE
#define NETREAD(s,b,l)	((s)>10 ? netread((s),(b),(l)) : read((s),(b),(l)))
#define NETWRITE(s,b,l)	((s)>10 ? netwrite((s),(b),(l)) : write((s),(b),(l)))
#define NETCLOSE(s) 	((s)>10 ? netclose(s) : close(s))
#endif /* WIN_TCP */

#ifdef MULTINET
#undef NETCLOSE
#undef NETREAD
#undef NETWRITE
#define NETREAD(s,b,l)	((s)>10 ? socket_read((s),(b),(l)) : read((s),(b),(l)))
#define NETWRITE(s,b,l)	((s)>10 ? socket_write((s),(b),(l)) : \
				write((s),(b),(l)))
#define NETCLOSE(s) 	((s)>10 ? socket_close(s) : close(s))
#define IOCTL(s,c,a)	socket_ioctl(s,c,a);
#endif /* MULTINET */

#ifdef DECNET
#undef SELECT  /* not supported */
#undef NETREAD
#undef NETWRITE
#undef NETCLOSE
#define NETREAD(s,b,l)	((s)>10 ? recv((s),(b),(l),0) : read((s),(b),(l)))
#define NETWRITE(s,b,l)	((s)>10 ? send((s),(b),(l),0) : write((s),(b),(l)))
#define NETCLOSE(s) 	((s)>10 ? socket_close(s) : close(s))
#endif /* Decnet */
         
/*	Certainly this works for UCX and Multinet; not tried for Wollongong
*/
#ifdef MULTINET
#include <time.h>
#ifdef __TIME_T
#define __TYPES
#define __TYPES_LOADED
#endif /* __TIME_T */
#include <multinet_root:[multinet.include.sys]types.h>
#include <multinet_root:[multinet.include]errno.h>
#ifdef __TYPES
#define __TIME_T
#endif /* __TYPE */
#ifdef __TIME_LOADED
#define __TIME
#endif /* __TIME_LOADED */
#include <multinet_root:[multinet.include.sys]time.h>
#else /* not MULTINET */
#include <types.h>
#include <errno.h>
#include <time.h>
#endif /* not MULTINET */

#include string

#ifndef STDIO_H
#include <stdio>
#define STDIO_H
#endif

#include file

#ifndef DECNET  /* Why is it used at all ? Types conflict with "types.h> */
#include unixio
#endif

#define INCLUDES_DONE

#ifdef MULTINET  /* Include from standard Multinet directories */
#include <multinet_root:[multinet.include.sys]socket.h>
#ifdef __TIME_LOADED  /* defined by sys$library:time.h */
#define __TIME  /* to avoid double definitions in next file */
#endif
#include <multinet_root:[multinet.include.netinet]in.h>
#include <multinet_root:[multinet.include.arpa]inet.h>
#include <multinet_root:[multinet.include]netdb.h>
#include <multinet_root:[multinet.include.sys]ioctl.h>

#else  /* not multinet */
#ifdef DECNET
#include <types.h>  /* for socket.h */
#include <socket.h>
#include <dn"
#include <dnetdb"

#else /* UCX or WIN */
#ifdef CADDR_T
#define __CADDR_T
#endif /* problem with xlib.h inclusion */
#include <socket.h>
#include <in.h>
#include <inet.h>
#include <netdb.h>
#include <ucx$inetdef.h>

#endif  /* not DECNET */
#endif  /* of Multinet or other TCP includes */

#define TCP_INCLUDES_DONE

On VMS directory browsing is available through a separate copy of dirent.c. The definition of R_OK seem to be missing from the system include files...

#define USE_DIRENT
#define GOT_READ_DIR
#include <dirent.h>
#define STRUCT_DIRENT struct dirent
#define R_OK 4

On VMS machines, the linker needs to be told to put global data sections into a data segment using these storage classes. (MarkDonszelmann)

#ifdef VAXC
#define GLOBALDEF globaldef
#define GLOBALREF globalref
#endif /*  VAXC */
#endif	/* vms */

On non-VMS machines, the GLOBALDEF and GLOBALREF storage types default to normal C storage types.

#ifndef GLOBALREF
#define GLOBALDEF
#define GLOBALREF extern
#endif

On non-VMS machines HTStat should be stat...On VMS machines HTStat is a function that converts directories and devices so that you can stat them.

#ifdef VMS
typedef unsigned long mode_t;
#define HTLstat HTStat
#else /* non VMS */
#define HTStat stat
#define HTLstat lstat
#endif /* non VMS */

Definition of Errno

#ifdef VMS
#ifndef __DECC
extern int uerrno;	/* Deposit of error info (as per errno.h) */
extern volatile noshare int socket_errno; /* socket VMS error info 
                                          (used for translation of vmserrno) */
extern volatile noshare int vmserrno;	/* Deposit of VMS error info */
extern volatile noshare int errno;  /* noshare to avoid PSECT conflict */
#define ERRNO_DONE
#endif /* not DECC */
#endif /* VMS */

SCO ODT unix version

(by Brian King)

#ifdef sco
#include <grp.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <time.h>
#define USE_DIRENT
#define NEED_INITGROUPS
#define NO_GETDOMAINNAME
#endif

MIPS unix

Mips hack (bsd4.3/sysV mixture...)

#ifdef Mips	/* Bruker */
typedef mode_t		int;
#define S_ENFMT		S_ISGID		/* record locking enforcement flag */
#define S_ISCHR(m)	((m) & S_IFCHR)
#define S_ISBLK(m)	((m) & S_IFBLK)
#define S_ISDIR(m)      (((m)& S_IFMT) == S_IFDIR)
#define S_ISREG(m)      (((m)& S_IFMT) == S_IFREG)
#define WEXITSTATUS(s)	(((s).w_status >> 8) & 0377)
#define NO_STRFTIME

File Permissions

#ifndef S_IRWXU
#define S_IRWXU 0000700
#define S_IRWXG 0000070
#define S_IRWXO 0000007
#define S_IRUSR 0000400
#define S_IWUSR 0000200
#define S_IXUSR 0000100
#define S_IRGRP 0000040
#define S_IWGRP 0000020
#define S_IXGRP 0000010
#define S_IROTH 0000004
#define S_IWOTH 0000002
#define S_IXOTH 0000001
#endif /* S_IRWXU */
#endif /* Mips */

Solaris

Includes Linux (thanks to Rainer Klute) and other SVR5 based systems

#if defined(__svr4__) || defined(_POSIX_SOURCE) || defined(__hpux)

#ifdef UTS4				      /* UTS wants sys/types.h first */
#include <sys/types.h>
#endif

#include <unistd.h>

#ifdef UTS4
#include <sys/fcntl.h>
#define POSIXWAIT
#endif

#ifdef AIX						       /* Apple Unix */
#include <fcntl.h>
#else
#include <sys/fcntl.h>
#endif

This is for NCR 3000 and Pyramid that also are SVR4 systems. Thanks to Alex Podlecki, <a.podlecki@att.com>

#ifndef NGROUPS_MAX		
#include <limits.h>
#endif

getwd() is BSD. System V has getcwd()

#define NO_GETWD
#define HAS_GETCWD

#endif /* Solaris and SVR4 */

UTS 2.1 (BSD-like)

#ifdef UTS2
#include <time.h>
#include <fcntl.h>

#define	NO_STRFTIME
#define	WEXITSTATUS(x)	((int)((x).w_T.w_Retcode))

#undef POSIXWAIT
#endif /* UTS2 */

OSF/1

#ifdef __osf__
#define USE_DIRENT
#endif /* OSF1 AXP */

ISC 3.0

by Lauren Weinstein <lauren@vortex.com>.


#ifdef ISC3			/* Lauren */
#define USE_DIRENT
#define GOT_READ_DIR
#include <sys/ipc.h>
#include <sys/dirent.h>
#define direct dirent
#include <sys/unistd.h>
#define d_namlen d_reclen
#include <sys/limits.h>
typedef int mode_t;
#define SIGSTP
#define POSIXWAIT
#define _POSIX_SOURCE
#include <sys/types.h>
#include <sys/wait.h>
#include <net/errno.h>

#define _SYSV3
#include <time.h>

#include <sys/fcntl.h>
#define S_ISDIR(m)	(((m) & 0170000) == 0040000)
#define S_ISCHR(m)	(((m) & 0170000) == 0020000)
#define S_ISBLK(m)	(((m) & 0170000) == 0060000)
#define S_ISREG(m)	(((m) & 0170000) == 0100000)
#define S_ISFIFO(m)	(((m) & 0170000) == 0010000)
#define S_ISLNK(m)	(((m) & 0170000) == 0120000)
#endif	/* ISC 3.0 */

#ifdef NeXT
#include <sys/types.h>
#include <sys/stat.h>

typedef unsigned short mode_t;

#ifndef S_ISDIR
#define S_ISDIR(m)     (m & S_IFDIR)
#define S_ISREG(m)     (m & S_IFREG)
#define S_ISCHR(m)     (m & S_IFCHR)
#define S_ISBLK(m)     (m & S_IFBLK)
#define S_ISLNK(m)     (m & S_IFLNK)
#define S_ISSOCK(m)    (m & S_IFSOCK)
#define S_ISFIFO(m)    (NO)
#endif

#ifndef WEXITSTATUS
#define WEXITSTATUS(s) (((s).w_status >> 8) & 0377)
#endif

#ifndef O_NONBLOCK
#define O_NONBLOCK	O_NDELAY
#endif

File Permissions for NeXT

#ifndef S_IRWXU
#define S_IRWXU 0000700
#define S_IRWXG 0000070
#define S_IRWXO 0000007
#define S_IRUSR 0000400
#define S_IWUSR 0000200
#define S_IXUSR 0000100
#define S_IRGRP 0000040
#define S_IWGRP 0000020
#define S_IXGRP 0000010
#define S_IROTH 0000004
#define S_IWOTH 0000002
#define S_IXOTH 0000001
#endif /* S_IRWXU */
#endif /* NeXT */

A/UX Apple UNIX

Kelly King, bhutab@apple.com and Jim Jagielski, jim@jagubox.gsfc.nasa.gov

#ifdef _AUX
#include <time.h>
#define WEXITSTATUS(s) (((s).w_status >> 8) & 0377)
#endif

Regular BSD unix versions

These are a default unix where not already defined specifically.

#ifndef INCLUDES_DONE

#include <sys/types.h>
#include <string.h>

#include <errno.h>	    /* independent */
#include <sys/time.h>	    /* independent */
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/file.h>	    /* For open() etc */
#define INCLUDES_DONE
#endif	/* Normal includes */

Directory reading stuff - BSD or SYS V

#ifdef unix                    	  /* if this is to compile on a UNIX machine */

#define GOT_PIPE				        /* We do have a pipe */

#define GOT_READ_DIR         /* if directory reading functions are available */
#include <pwd.h>
#include <grp.h>

#include <stdio.h>

#ifndef NeXT
#define USE_DIRENT		  /* Try this all the time, Henrik May 29 94 */
#endif
#ifdef USE_DIRENT             			 	    /* sys v version */
#include <dirent.h>
#define STRUCT_DIRENT struct dirent
#else
#include <sys/dir.h>
#define STRUCT_DIRENT struct direct
#endif

#if defined(sun) && defined(__svr4__)
#include <sys/fcntl.h>
#include <limits.h>
#endif
#ifndef FNDELAY
#define FNDELAY		O_NDELAY
#endif

#if !defined(NeXT) && !defined(BSD4_4)
extern char *sys_errlist[];
extern int sys_nerr;
#endif

#endif /* unix */

General Stuff

Information below this line is general for most platforms.

SOCKS

SOCKS modifications by Ian Dunkin <imd1707@ggr.co.uk>.

#if defined(SOCKS) && !defined(RULE_FILE)
#define connect Rconnect
#define accept  Raccept
#define getsockname Rgetsockname
#define bind Rbind 
#define listen Rlisten  
#endif

Network Family

#ifdef DECNET
typedef struct sockaddr_dn SockA;  /* See netdnet/dn.h or custom vms.h */
#else /* Internet */
typedef struct sockaddr_in SockA;  /* See netinet/in.h */
#endif

Default Values of Network Access

#ifndef NETCLOSE
#define NETCLOSE close		/* Routine to close a TCP-IP socket */
#endif

#ifndef NETREAD
#define NETREAD  read		/* Routine to read from a TCP-IP socket	*/
#endif

#ifndef NETWRITE
#define NETWRITE write		/* Routine to write to a TCP-IP socket */
#endif

Include files for TCP

#ifndef TCP_INCLUDES_DONE
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>		       /* Must be after netinet/in.h */
#include <netdb.h>
#define TCP_INCLUDES_DONE
#endif

Definition of errno and Return Code

#ifndef ERRNO_DONE
extern int errno;
#define socerrno errno
#endif

Definition of Socket Desrciptores

This is necessary in order to support Windows NT...

#ifndef SOCKFD
#define SOCKFD int		/* Unix like socket descriptor */
#define INVSOC -1		/* Unix invalid socket */
#endif

Rough estimate of max path length

#ifndef HT_MAX_PATH
#ifdef MAXPATHLEN
#define HT_MAX_PATH MAXPATHLEN
#else
#ifdef PATH_MAX
#define HT_MAX_PATH PATH_MAX
#else
#define HT_MAX_PATH 1024	 	      	/* Any better ideas? */
#endif
#endif
#endif /* HT_MAX_PATH */

Definition of NGROUPS

#ifdef NO_UNIX_IO
#define NO_GROUPS
#endif

#ifndef NO_GROUPS
#ifndef NGROUPS
#ifdef NGROUPS_MAX
#define NGROUPS NGROUPS_MAX
#else
#define NGROUPS 20				/* Any better ideas? */
#endif
#endif
#endif

Definition of Standard File Descriptors

If we don't have stderr etc. then set STDIN_FILENO to a dummy value. However, the value IS used!

#ifdef NO_STDIO
#define STDIN_FILENO	-1
#else
#ifndef STDIN_FILENO
#define STDIN_FILENO	0
#endif
#ifndef STDOUT_FILENO
#define STDOUT_FILENO	1
#endif
#ifndef STDERR_FILENO
#define STDERR_FILENO	2
#endif
#endif

Definition of Max Domain Name Length

#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64			/* Any better ideas? */
#endif

Macros for manipulating masks for select()

#ifdef SELECT
#ifndef FD_SET
typedef unsigned int fd_set;
#define FD_SET(fd,pmask) (*(pmask)) |=  (1<<(fd))
#define FD_CLR(fd,pmask) (*(pmask)) &= ~(1<<(fd))
#define FD_ZERO(pmask)   (*(pmask))=0
#define FD_ISSET(fd,pmask) (*(pmask) & (1<<(fd)))
#endif  /* FD_SET */
#endif  /* SELECT */

Macros for converting characters

#ifndef TOASCII
#define TOASCII(c) (c)
#define FROMASCII(c) (c)                                   
#endif

White Characters

Is character c white space? For speed, include all control characters

#define WHITE(c) (((unsigned char)(TOASCII(c))) <= 32)

Cache file prefix

This is something onto which we tag something meaningful to make a cache file name. used in HTWSRC.c at least. If it is nor defined at all, caching is turned off.

#ifndef CACHE_FILE_PREFIX
#ifdef unix
#define CACHE_FILE_PREFIX  "/usr/wsrc/"
#endif
#endif

#endif

End of system-specific file