174 lines
3.1 KiB
C
174 lines
3.1 KiB
C
/*
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* Copyright (C) 1995-2001 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*/
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#if defined(__sgi) && (IRIX > 602)
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# include <sys/ptimers.h>
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#endif
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#include <stdio.h>
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#include <ctype.h>
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#include <assert.h>
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#include <string.h>
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#include <sys/types.h>
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#if !defined(__SVR4) && !defined(__svr4__)
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#include <strings.h>
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#else
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#include <sys/byteorder.h>
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stddef.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#ifndef linux
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#include <netinet/ip_var.h>
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#endif
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#include <netinet/ip.h>
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#include <netinet/udp.h>
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#include <netinet/tcp.h>
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#include <netinet/ip_icmp.h>
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#include <net/if.h>
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#include <netdb.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include "ip_compat.h"
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#include <netinet/tcpip.h>
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#include "ipf.h"
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#include "ipt.h"
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#if !defined(lint)
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static const char sccsid[] = "@(#)ipft_hx.c 1.1 3/9/96 (C) 1996 Darren Reed";
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static const char rcsid[] = "@(#)$Id: ipft_hx.c,v 2.2.2.6 2002/12/06 11:40:25 darrenr Exp $";
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#endif
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extern int opts;
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static int hex_open __P((char *));
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static int hex_close __P((void));
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static int hex_readip __P((char *, int, char **, int *));
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static char *readhex __P((char *, char *));
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struct ipread iphex = { hex_open, hex_close, hex_readip };
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static FILE *tfp = NULL;
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static int tfd = -1;
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static int hex_open(fname)
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char *fname;
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{
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if (tfp && tfd != -1) {
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rewind(tfp);
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return tfd;
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}
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if (!strcmp(fname, "-")) {
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tfd = 0;
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tfp = stdin;
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} else {
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tfd = open(fname, O_RDONLY);
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if (tfd != -1)
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tfp = fdopen(tfd, "r");
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}
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return tfd;
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}
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static int hex_close()
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{
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int cfd = tfd;
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tfd = -1;
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return close(cfd);
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}
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static int hex_readip(buf, cnt, ifn, dir)
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char *buf, **ifn;
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int cnt, *dir;
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{
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register char *s, *t, *u;
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char line[513];
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ip_t *ip;
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/*
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* interpret start of line as possibly "[ifname]" or
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* "[in/out,ifname]".
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*/
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if (ifn)
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*ifn = NULL;
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if (dir)
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*dir = 0;
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ip = (ip_t *)buf;
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while (fgets(line, sizeof(line)-1, tfp)) {
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if ((s = index(line, '\n'))) {
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if (s == line)
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return (char *)ip - buf;
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*s = '\0';
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}
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if ((s = index(line, '#')))
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*s = '\0';
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if (!*line)
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continue;
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if (!(opts & OPT_BRIEF)) {
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printf("input: %s\n", line);
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fflush(stdout);
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}
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if ((*line == '[') && (s = index(line, ']'))) {
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t = line + 1;
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if (s - t > 0) {
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*s++ = '\0';
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if ((u = index(t, ',')) && (u < s)) {
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u++;
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if (ifn)
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*ifn = strdup(u);
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if (dir) {
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if (*t == 'i')
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*dir = 0;
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else if (*t == 'o')
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*dir = 1;
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}
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} else if (ifn)
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*ifn = t;
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}
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} else
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s = line;
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ip = (ip_t *)readhex(s, (char *)ip);
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}
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return -1;
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}
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static char *readhex(src, dst)
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register char *src, *dst;
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{
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int state = 0;
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char c;
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while ((c = *src++)) {
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if (isspace(c)) {
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if (state) {
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dst++;
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state = 0;
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}
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continue;
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} else if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
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(c >= 'A' && c <= 'F')) {
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c = isdigit(c) ? (c - '0') : (toupper(c) - 55);
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if (state == 0) {
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*dst = (c << 4);
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state++;
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} else {
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*dst++ |= c;
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state = 0;
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}
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} else
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break;
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}
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return dst;
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}
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