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/*
* Misc routines that are used by tcpd and by tcpdchk.
*
* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
*/
#ifndef lint
static char sccsic[] = "@(#) misc.c 1.2 96/02/11 17:01:29";
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tcpd.h"
extern char *fgets();
#ifndef INADDR_NONE
#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
#endif
/* xgets - fgets() with backslash-newline stripping */
char *xgets(ptr, len, fp)
char *ptr;
int len;
FILE *fp;
{
int got;
char *start = ptr;
while (fgets(ptr, len, fp)) {
got = strlen(ptr);
if (got >= 1 && ptr[got - 1] == '\n') {
tcpd_context.line++;
if (got >= 2 && ptr[got - 2] == '\\') {
got -= 2;
} else {
return (start);
}
}
ptr += got;
len -= got;
if (len == 1)
return(start);
ptr[0] = 0;
}
return (ptr > start ? start : 0);
}
/* split_at - break string at delimiter or return NULL */
char *split_at(string, delimiter)
char *string;
int delimiter;
{
char *cp;
#ifdef INET6
int bracket = 0;
for (cp = string; cp && *cp; cp++) {
switch (*cp) {
case '[':
bracket++;
break;
case ']':
bracket--;
break;
default:
if (bracket == 0 && *cp == delimiter) {
*cp++ = 0;
return cp;
}
break;
}
}
return (NULL);
#else
if ((cp = strchr(string, delimiter)) != 0)
*cp++ = 0;
return (cp);
#endif
}
/* dot_quad_addr - convert dotted quad to internal form */
unsigned long dot_quad_addr(str)
char *str;
{
int in_run = 0;
int runs = 0;
char *cp = str;
/* Count the number of runs of non-dot characters. */
while (*cp) {
if (*cp == '.') {
in_run = 0;
} else if (in_run == 0) {
in_run = 1;
runs++;
}
cp++;
}
return (runs == 4 ? inet_addr(str) : INADDR_NONE);
}
/* cidr_mask_addr - convert cidr netmask length to internal form */
unsigned long cidr_mask_addr(str)
char *str;
{
int maskbits;
maskbits = atoi(str);
if (maskbits < 1 || maskbits > 32)
return (0);
return htonl(0xFFFFFFFF << (32 - maskbits));
}
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