/* * Copyright (c) 1993 W. Richard Stevens.  All rights reserved. * Permission to use or modify this software and its documentation only for * educational purposes and without fee is hereby granted, provided that * the above copyright notice appear in all copies.  The author makes no * representations about the suitability of this software for any purpose. * It is provided "as is" without express or implied warranty. */#include	<sys/types.h>#include	<sys/socket.h>#include	<sys/uio.h>#include	<sys/time.h>		/* struct timeval for select() */#ifdef	_AIX#include	<sys/select.h>#endif#include	<netinet/in.h>#ifdef	__bsdi__#include	<machine/endian.h>	/* required before tcp.h, for BYTE_ORDER */#endif#include	<netinet/tcp.h>		/* TCP_NODELAY */#include	<netdb.h>			/* getservbyname(), gethostbyname() */#include	<arpa/inet.h>		/* inet_addr() */#include	<errno.h>#include	<signal.h>#include	"ourhdr.h"				/* declare global variables */extern int		bindport;extern int		broadcast;extern int		cbreak;extern int		client;extern int		crlf;extern int		debug;extern int		dofork;extern char		foreignip[];extern int		foreignport;extern int		halfclose;extern int		keepalive;extern long		linger;extern int		listenq;extern int		nodelay;extern int		nbuf;extern int		pauseclose;extern int		pauseinit;extern int		pauselisten;extern int		pauserw;extern int		reuseaddr;extern int		readlen;extern int		writelen;extern int		recvdstaddr;extern int		rcvbuflen;extern int		sndbuflen;extern char	   *rbuf;extern char	   *wbuf;extern int		server;extern int		sourcesink;extern int		udp;extern int		urgwrite;extern int		verbose;#ifndef	INADDR_NONE#define	INADDR_NONE	0xffffffff	/* should be in <netinet/in.h> */#endif/* Earlier versions of gcc under SunOS 4.x have problems passing arguments   that are structs (as opposed to pointers to structs).  This shows up   with inet_ntoa, whose argument is a "struct in_addr". */#if	defined(sun) && defined(__GNUC__) && defined(GCC_STRUCT_PROBLEM)#define	INET_NTOA(foo)	inet_ntoa(&foo)#else#define	INET_NTOA(foo)	inet_ntoa(foo)#endif				/* function prototypes */void	bcopy(const void *, void *, size_t);void	bzero(void *, size_t);void	buffers(int);int		cliopen(char *host, char *port);int		crlf_add(char *dst, int dstsize, const char *src, int lenin);int		crlf_strip(char *dst, int dstsize, const char *src, int lenin);void	loop(int);int		servopen(char *host, char *port);void	sink(int sockfd);void	sockopts(int sockfd, int doall);