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/* $FreeBSD$ */
/*
* Copyright (C) 1995-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*/
#if !defined(lint)
static const char sccsid[] = "@(#)ipft_hx.c 1.1 3/9/96 (C) 1996 Darren Reed";
static const char rcsid[] = "@(#)$Id: ipft_hx.c,v 1.11.4.3 2005/12/04 10:07:21 darrenr Exp $";
#endif
#include <ctype.h>
#include "ipf.h"
#include "ipt.h"
extern int opts;
static int hex_open __P((char *));
static int hex_close __P((void));
static int hex_readip __P((char *, int, char **, int *));
static char *readhex __P((char *, char *));
struct ipread iphex = { hex_open, hex_close, hex_readip, 0 };
static FILE *tfp = NULL;
static int tfd = -1;
static int hex_open(fname)
char *fname;
{
if (tfp && tfd != -1) {
rewind(tfp);
return tfd;
}
if (!strcmp(fname, "-")) {
tfd = 0;
tfp = stdin;
} else {
tfd = open(fname, O_RDONLY);
if (tfd != -1)
tfp = fdopen(tfd, "r");
}
return tfd;
}
static int hex_close()
{
int cfd = tfd;
tfd = -1;
return close(cfd);
}
static int hex_readip(buf, cnt, ifn, dir)
char *buf, **ifn;
int cnt, *dir;
{
register char *s, *t, *u;
char line[513];
ip_t *ip;
/*
* interpret start of line as possibly "[ifname]" or
* "[in/out,ifname]".
*/
if (ifn)
*ifn = NULL;
if (dir)
*dir = 0;
ip = (ip_t *)buf;
while (fgets(line, sizeof(line)-1, tfp)) {
if ((s = strchr(line, '\n'))) {
if (s == line)
return (char *)ip - buf;
*s = '\0';
}
if ((s = strchr(line, '#')))
*s = '\0';
if (!*line)
continue;
if ((opts & OPT_DEBUG) != 0) {
printf("input: %s", line);
}
if ((*line == '[') && (s = strchr(line, ']'))) {
t = line + 1;
if (s - t > 0) {
*s++ = '\0';
if ((u = strchr(t, ',')) && (u < s)) {
u++;
if (ifn)
*ifn = strdup(u);
if (dir) {
if (*t == 'i')
*dir = 0;
else if (*t == 'o')
*dir = 1;
}
} else if (ifn)
*ifn = t;
}
} else
s = line;
t = (char *)ip;
ip = (ip_t *)readhex(s, (char *)ip);
if ((opts & OPT_DEBUG) != 0) {
if (opts & OPT_ASCII) {
if (t < (char *)ip)
putchar('\t');
while (t < (char *)ip) {
if (ISPRINT(*t) && ISASCII(*t))
putchar(*t);
else
putchar('.');
t++;
}
}
putchar('\n');
fflush(stdout);
}
}
if (feof(tfp))
return 0;
return -1;
}
static char *readhex(src, dst)
register char *src, *dst;
{
int state = 0;
char c;
while ((c = *src++)) {
if (ISSPACE(c)) {
if (state) {
dst++;
state = 0;
}
continue;
} else if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
(c >= 'A' && c <= 'F')) {
c = ISDIGIT(c) ? (c - '0') : (TOUPPER(c) - 55);
if (state == 0) {
*dst = (c << 4);
state++;
} else {
*dst++ |= c;
state = 0;
}
} else
break;
}
return dst;
}
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