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HAM Radio 3
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hamradioversion3.0examsandprograms1992.iso
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9q920411
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netuser.c
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C/C++ Source or Header
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1991-01-27
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/* Miscellaneous integer and IP address format conversion subroutines
* Copyright 1991 Phil Karn, KA9Q
*/
#define LINELEN 256
#include <ctype.h>
#include <stdio.h>
#include "global.h"
#include "netuser.h"
int Net_error;
/* Convert Internet address in ascii dotted-decimal format (44.0.0.1) to
* binary IP address
*/
int32
aton(s)
register char *s;
{
int32 n;
register int i;
n = 0;
if(s == NULLCHAR)
return 0;
for(i=24;i>=0;i -= 8){
/* Skip any leading stuff (e.g., spaces, '[') */
while(*s != '\0' && !isdigit(*s))
s++;
if(*s == '\0')
break;
n |= (int32)atoi(s) << i;
if((s = strchr(s,'.')) == NULLCHAR)
break;
s++;
}
return n;
}
/* Convert an internet address (in host byte order) to a dotted decimal ascii
* string, e.g., 255.255.255.255\0
*/
char *
inet_ntoa(a)
int32 a;
{
static char buf[16];
sprintf(buf,"%u.%u.%u.%u",
hibyte(hiword(a)),
lobyte(hiword(a)),
hibyte(loword(a)),
lobyte(loword(a)) );
return buf;
}
/* Convert hex-ascii string to long integer */
long
htol(s)
char *s;
{
long ret;
char c;
ret = 0;
while((c = *s++) != '\0'){
c &= 0x7f;
if(c == 'x')
continue; /* Ignore 'x', e.g., '0x' prefixes */
if(c >= '0' && c <= '9')
ret = ret*16 + (c - '0');
else if(c >= 'a' && c <= 'f')
ret = ret*16 + (10 + c - 'a');
else if(c >= 'A' && c <= 'F')
ret = ret*16 + (10 + c - 'A');
else
break;
}
return ret;
}
char *
pinet(s)
struct socket *s;
{
static char buf[30];
sprintf(buf,"%s:%u",inet_ntoa(s->address),s->port);
return buf;
}