home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
ftp.wwiv.com
/
ftp.wwiv.com.zip
/
ftp.wwiv.com
/
pub
/
PPPBCKP
/
SRC15B44.ZIP
/
WATTSRC.ZIP
/
SRC
/
UDP_NDS.C
< prev
next >
Wrap
Text File
|
1994-11-28
|
989b
|
58 lines
#include <copyright.h>
#include <wattcp.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
/*
* Name Domain Service
*
* V
* 0.0 : Jan 11, 1991 : E. Engelke
*/
/*
* aton()
* - converts [a.b.c.d] or a.b.c.d to 32 bit long
* - returns 0 on error (safer than -1)
*/
longword aton( char *text )
{
/* char *p; */
int i, cur;
longword ip;
ip = 0;
if ( *text == '[' )
++text;
for ( i = 24; i >= 0; i -= 8 ) {
cur = atoi( text );
ip |= (longword)(cur & 0xff) << i;
if (!i) break;
if ((text = strchr( text, '.')) == NULL)
return( 0 ); /* return 0 on error */
++text;
}
return(ip);
}
/*
* isaddr
* - returns nonzero if text is simply ip address
*/
int isaddr( char *text )
{
char ch;
while ( (ch = *text++) != '\0' ) {
if ( isdigit(ch) ) continue;
if ( ch == '.' || ch == ' ' || ch == '[' || ch == ']' )
continue;
return( 0 );
}
return( 1 );
}