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/*
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% N N EEEEE TTTTT W W OOO RRRR K K %
% NN N E T W W O O R R K K %
% N N N EEE T W W W O O RRRR KKK %
% N NN E T WW WW O O R R K K %
% N N EEEEE T W W OOO R R K K %
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% Network Routines. %
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% Software Design %
% John Cristy %
% October 1992 %
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% Copyright 1995 E. I. Dupont de Nemours and Company %
% %
% Permission to use, copy, modify, distribute, and sell this software and %
% its documentation for any purpose is hereby granted without fee, %
% provided that the above Copyright notice appear in all copies and that %
% both that Copyright notice and this permission notice appear in %
% supporting documentation, and that the name of E. I. Dupont de Nemours %
% and Company not be used in advertising or publicity pertaining to %
% distribution of the software without specific, written prior %
% permission. E. I. Dupont de Nemours and Company makes no representations %
% about the suitability of this software for any purpose. It is provided %
% "as is" without express or implied warranty. %
% %
% E. I. Dupont de Nemours and Company disclaims all warranties with regard %
% to this software, including all implied warranties of merchantability %
% and fitness, in no event shall E. I. Dupont de Nemours and Company be %
% liable for any special, indirect or consequential damages or any %
% damages whatsoever resulting from loss of use, data or profits, whether %
% in an action of contract, negligence or other tortious action, arising %
% out of or in connection with the use or performance of this software. %
% %
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%
%
*/
#include "xtp.h"
#include "regular.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
/*
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% G e t H o s t I n f o %
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% Function GetHostInfo accepts a host name or address, verifies it is valid,
% and returns both the host name and address from the network host entry.
%
% The format of the GetHostInfo routine is:
%
% info=GetHostInfo(name)
%
% A description of each parameter follows:
%
% o info: Function GetHostInfo returns a pointer to the host name and
% IP address. A null pointer is returned if there the host cannot be
% located.
%
% o name: Specifies a pointer to a character array that contains either
% a name of a host or an IP address.
%
%
*/
char *GetHostInfo(char *name)
{
char
*p;
static char
info[2048];
struct in_addr
in;
struct hostent
*hp;
/*
Get host name and address.
*/
if (isascii(*name) && isdigit(*name))
in.s_addr=inet_addr(name);
else
{
in.s_addr=(unsigned long) -1;
hp=gethostbyname(name);
if (hp != (struct hostent *) NULL)
in.s_addr=(*(int *) hp->h_addr);
}
hp=gethostbyaddr((char *) &in,sizeof(struct in_addr),AF_INET);
if (hp == (struct hostent *) NULL)
{
hp=gethostbyname(name);
if (hp == (struct hostent *) NULL)
return((char *) NULL);
}
/*
Convert hostname to lower-case characters.
*/
p=hp->h_name;
while (*p)
{
if (isupper(*p))
*p=tolower(*p);
p++;
}
(void) sprintf(info,"%s [%s]: ",hp->h_name,inet_ntoa(in));
return(info);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.