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