198 lines
3.9 KiB
C
198 lines
3.9 KiB
C
/* $NetBSD: ipft_td.c,v 1.8 2003/05/17 01:11:53 itojun Exp $ */
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/*
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* Copyright (C) 1993-2001 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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/*
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tcpdump -n
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00:05:47.816843 128.231.76.76.3291 > 224.2.252.231.36573: udp 36 (encap)
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tcpdump -nq
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00:33:48.410771 192.73.213.11.1463 > 224.2.248.153.59360: udp 31 (encap)
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tcpdump -nqt
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128.250.133.13.23 > 128.250.20.20.2419: tcp 27
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tcpdump -nqtt
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123456789.1234567 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
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tcpdump -nqte
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8:0:20:f:65:f7 0:0:c:1:8a:c5 81: 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
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*/
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#ifdef __sgi
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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 <string.h>
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#if !defined(__SVR4) && !defined(__GNUC__)
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#include <strings.h>
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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 <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 <arpa/inet.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/tcp.h>
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#include <netinet/udp.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 "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[] __attribute__((__unused__)) =
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"@(#)ipft_td.c 1.8 2/4/96 (C)1995 Darren Reed";
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static const char rcsid[] __attribute__((__unused__)) =
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"@(#)Id: ipft_td.c,v 2.2.2.3 2002/06/27 14:29:17 darrenr Exp";
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#endif
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static int tcpd_open __P((char *));
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static int tcpd_close __P((void));
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static int tcpd_readip __P((char *, int, char **, int *));
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static int count_dots __P((char *));
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struct ipread tcpd = { tcpd_open, tcpd_close, tcpd_readip };
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static FILE *tfp = NULL;
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static int tfd = -1;
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static int tcpd_open(fname)
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char *fname;
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{
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if (tfd != -1)
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return tfd;
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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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tfp = fdopen(tfd, "r");
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}
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return tfd;
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}
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static int tcpd_close()
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{
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(void) fclose(tfp);
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return close(tfd);
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}
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static int count_dots(str)
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char *str;
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{
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int i = 0;
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while (*str)
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if (*str++ == '.')
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i++;
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return i;
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}
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static int tcpd_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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struct tcpiphdr pkt;
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ip_t *ip = (ip_t *)&pkt;
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struct protoent *p;
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char src[32], dst[32], misc[256], time[32], link1[32], link2[32];
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char lbuf[160], *s;
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int n, slen, extra = 0;
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if (!fgets(lbuf, sizeof(lbuf) - 1, tfp))
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return 0;
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if ((s = strchr(lbuf, '\n')))
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*s = '\0';
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lbuf[sizeof(lbuf)-1] = '\0';
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bzero(&pkt, sizeof(pkt));
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if ((n = sscanf(lbuf, "%31s > %31s: %255s", src, dst, misc)) != 3)
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if ((n = sscanf(lbuf, "%31s %31s > %31s: %255s",
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time, src, dst, misc)) != 4)
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if ((n = sscanf(lbuf, "%31s %31s: %31s > %31s: %255s",
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link1, link2, src, dst, misc)) != 5) {
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n = sscanf(lbuf,
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"%31s %31s %31s: %31s > %31s: %255s",
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time, link1, link2, src, dst, misc);
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if (n != 6)
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return -1;
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}
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if (count_dots(dst) == 4) {
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s = strrchr(src, '.');
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*s++ = '\0';
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(void) inet_aton(src, &ip->ip_src);
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pkt.ti_sport = htons(atoi(s));
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*--s = '.';
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s = strrchr(dst, '.');
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*s++ = '\0';
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(void) inet_aton(src, &ip->ip_dst);
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pkt.ti_dport = htons(atoi(s));
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*--s = '.';
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} else {
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(void) inet_aton(src, &ip->ip_src);
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(void) inet_aton(src, &ip->ip_dst);
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}
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ip->ip_len = ip->ip_hl = sizeof(ip_t);
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s = strtok(misc, " :");
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if ((p = getprotobyname(s))) {
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ip->ip_p = p->p_proto;
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switch (p->p_proto) {
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case IPPROTO_TCP :
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case IPPROTO_UDP :
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s = strtok(NULL, " :");
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ip->ip_len += atoi(s);
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if (p->p_proto == IPPROTO_TCP)
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extra = sizeof(struct tcphdr);
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else if (p->p_proto == IPPROTO_UDP)
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extra = sizeof(struct udphdr);
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break;
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#ifdef IGMP
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case IPPROTO_IGMP :
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extra = sizeof(struct igmp);
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break;
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#endif
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case IPPROTO_ICMP :
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extra = sizeof(struct icmp);
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break;
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default :
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break;
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}
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}
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slen = ip->ip_hl + extra + ip->ip_len;
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return slen;
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}
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