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/* $OpenBSD: ipft_hx.c,v 1.14 2001/01/30 04:31:01 kjell Exp $ */
/*
* Copyright (C) 1995-2000 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
#include <stdio.h>
#include <ctype.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#if !defined(__SVR4) && !defined(__svr4__)
#include <strings.h>
#else
#include <sys/byteorder.h>
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <stdlib.h>
#include <unistd.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#ifndef linux
#include <netinet/ip_var.h>
#endif
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <netinet/ip_icmp.h>
#include <net/if.h>
#include <netdb.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <netinet/ip_fil_compat.h>
#include <netinet/tcpip.h>
#include "ipf.h"
#include "ipt.h"
#if !defined(lint)
static const char sccsid[] = "@(#)ipft_hx.c 1.1 3/9/96 (C) 1996 Darren Reed";
static const char rcsid[] = "@(#)$IPFilter: ipft_hx.c,v 2.2 2000/03/13 22:10:24 darrenr Exp $";
#endif
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 };
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;
ip = (ip_t *)buf;
while (fgets(line, sizeof(line)-1, tfp)) {
if ((s = index(line, '\n'))) {
if (s == line)
return (char *)ip - buf;
*s = '\0';
}
if ((s = index(line, '#')))
*s = '\0';
if (!*line)
continue;
if (!(opts & OPT_BRIEF)) {
printf("input: %s\n", line);
fflush(stdout);
}
/*
* interpret start of line as possibly "[ifname]" or
* "[in/out,ifname]".
*/
if (ifn)
*ifn = NULL;
if (dir)
*dir = 0;
if ((*buf == '[') && (s = index(line, ']'))) {
t = buf + 1;
if (t - s > 0) {
if ((u = index(t, ',')) && (u < s)) {
u++;
if (ifn)
*ifn = u;
if (dir) {
if (*t == 'i')
*dir = 0;
else if (*t == 'o')
*dir = 1;
}
} else if (ifn)
*ifn = t;
*s++ = '\0';
}
} else
s = line;
ip = (ip_t *)readhex(s, (char *)ip);
}
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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