192 lines
3.9 KiB
C
192 lines
3.9 KiB
C
/* $NetBSD: ipft_td.c,v 1.1.1.4 1997/05/27 22:17:05 thorpej Exp $ */
|
|
|
|
/*
|
|
* (C)opyright 1993,1994,1995 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.
|
|
*/
|
|
|
|
/*
|
|
tcpdump -n
|
|
|
|
00:05:47.816843 128.231.76.76.3291 > 224.2.252.231.36573: udp 36 (encap)
|
|
|
|
tcpdump -nq
|
|
|
|
00:33:48.410771 192.73.213.11.1463 > 224.2.248.153.59360: udp 31 (encap)
|
|
|
|
tcpdump -nqt
|
|
|
|
128.250.133.13.23 > 128.250.20.20.2419: tcp 27
|
|
|
|
tcpdump -nqtt
|
|
|
|
123456789.1234567 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
|
|
|
|
tcpdump -nqte
|
|
|
|
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
|
|
|
|
*/
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#if !defined(__SVR4) && !defined(__GNUC__)
|
|
#include <strings.h>
|
|
#endif
|
|
#include <sys/types.h>
|
|
#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 <arpa/inet.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/tcp.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/ip_icmp.h>
|
|
#include <netinet/tcpip.h>
|
|
#include <net/if.h>
|
|
#include <netdb.h>
|
|
#include <netinet/ip_compat.h>
|
|
#include "ipf.h"
|
|
#include "ipt.h"
|
|
|
|
#if !defined(lint) && defined(LIBC_SCCS)
|
|
static char sccsid[] = "@(#)ipft_td.c 1.8 2/4/96 (C)1995 Darren Reed";
|
|
static char rcsid[] = "Id: ipft_td.c,v 2.0.2.4 1997/04/30 13:55:12 darrenr Exp ";
|
|
#endif
|
|
|
|
static int tcpd_open __P((char *));
|
|
static int tcpd_close __P((void));
|
|
static int tcpd_readip __P((char *, int, char **, int *));
|
|
static int count_dots __P((char *));
|
|
|
|
struct ipread tcpd = { tcpd_open, tcpd_close, tcpd_readip };
|
|
|
|
static FILE *tfp = NULL;
|
|
static int tfd = -1;
|
|
|
|
|
|
static int tcpd_open(fname)
|
|
char *fname;
|
|
{
|
|
if (tfd != -1)
|
|
return tfd;
|
|
|
|
if (!strcmp(fname, "-")) {
|
|
tfd = 0;
|
|
tfp = stdin;
|
|
} else {
|
|
tfd = open(fname, O_RDONLY);
|
|
tfp = fdopen(tfd, "r");
|
|
}
|
|
return tfd;
|
|
}
|
|
|
|
|
|
static int tcpd_close()
|
|
{
|
|
(void) fclose(tfp);
|
|
return close(tfd);
|
|
}
|
|
|
|
|
|
static int count_dots(str)
|
|
char *str;
|
|
{
|
|
int i = 0;
|
|
|
|
while (*str)
|
|
if (*str++ == '.')
|
|
i++;
|
|
return i;
|
|
}
|
|
|
|
|
|
static int tcpd_readip(buf, cnt, ifn, dir)
|
|
char *buf, **ifn;
|
|
int cnt, *dir;
|
|
{
|
|
struct tcpiphdr pkt;
|
|
struct ip *ip = (struct ip *)&pkt;
|
|
struct protoent *p;
|
|
char src[32], dst[32], misc[256], time[32], link1[32], link2[32];
|
|
char lbuf[160], *s;
|
|
int n, dots, slen, extra = 0;
|
|
|
|
if (!fgets(lbuf, sizeof(lbuf) - 1, tfp))
|
|
return 0;
|
|
|
|
if ((s = strchr(lbuf, '\n')))
|
|
*s = '\0';
|
|
lbuf[sizeof(lbuf)-1] = '\0';
|
|
|
|
bzero(&pkt, sizeof(pkt));
|
|
|
|
if ((n = sscanf(lbuf, "%s > %s: %s", src, dst, misc)) != 3)
|
|
if ((n = sscanf(lbuf, "%s %s > %s: %s",
|
|
time, src, dst, misc)) != 4)
|
|
if ((n = sscanf(lbuf, "%s %s: %s > %s: %s",
|
|
link1, link2, src, dst, misc)) != 5) {
|
|
n = sscanf(lbuf, "%s %s %s: %s > %s: %s",
|
|
time, link1, link2, src, dst, misc);
|
|
if (n != 6)
|
|
return -1;
|
|
}
|
|
|
|
if ((dots = count_dots(dst)) == 4) {
|
|
s = strrchr(src, '.');
|
|
*s++ = '\0';
|
|
(void) inet_aton(src, &ip->ip_src);
|
|
pkt.ti_sport = htons(atoi(s));
|
|
*--s = '.';
|
|
s = strrchr(dst, '.');
|
|
|
|
*s++ = '\0';
|
|
(void) inet_aton(src, &ip->ip_dst);
|
|
pkt.ti_dport = htons(atoi(s));
|
|
*--s = '.';
|
|
|
|
} else {
|
|
(void) inet_aton(src, &ip->ip_src);
|
|
(void) inet_aton(src, &ip->ip_dst);
|
|
}
|
|
ip->ip_len = ip->ip_hl = sizeof(struct ip);
|
|
|
|
s = strtok(misc, " :");
|
|
if ((p = getprotobyname(s))) {
|
|
ip->ip_p = p->p_proto;
|
|
|
|
switch (p->p_proto) {
|
|
case IPPROTO_TCP :
|
|
case IPPROTO_UDP :
|
|
s = strtok(NULL, " :");
|
|
ip->ip_len += atoi(s);
|
|
if (p->p_proto == IPPROTO_TCP)
|
|
extra = sizeof(struct tcphdr);
|
|
else if (p->p_proto == IPPROTO_UDP)
|
|
extra = sizeof(struct udphdr);
|
|
break;
|
|
#ifdef IGMP
|
|
case IPPROTO_IGMP :
|
|
extra = sizeof(struct igmp);
|
|
break;
|
|
#endif
|
|
case IPPROTO_ICMP :
|
|
extra = sizeof(struct icmp);
|
|
break;
|
|
default :
|
|
break;
|
|
}
|
|
}
|
|
slen = ip->ip_hl + extra + ip->ip_len;
|
|
return slen;
|
|
}
|