164 lines
3.3 KiB
C
164 lines
3.3 KiB
C
/* $NetBSD: ipresend.c,v 1.1.1.3 1997/09/21 16:49:04 veego Exp $ */
|
|
|
|
/*
|
|
* ipresend.c (C) 1995-1997 Darren Reed
|
|
*
|
|
* This was written to test what size TCP fragments would get through
|
|
* various TCP/IP packet filters, as used in IP firewalls. In certain
|
|
* conditions, enough of the TCP header is missing for unpredictable
|
|
* results unless the filter is aware that this can happen.
|
|
*
|
|
* 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.
|
|
*/
|
|
#if !defined(lint) && defined(LIBC_SCCS)
|
|
static char sccsid[] = "%W% %G% (C)1995 Darren Reed";
|
|
#endif
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <netdb.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/tcp.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/ip_icmp.h>
|
|
#ifndef linux
|
|
#include <netinet/ip_var.h>
|
|
#endif
|
|
#include "ipsend.h"
|
|
|
|
|
|
extern char *optarg;
|
|
extern int optind;
|
|
#ifndef NO_IPF
|
|
extern struct ipread snoop, pcap, etherf, iphex, tcpd, iptext;
|
|
#endif
|
|
|
|
int opts = 0;
|
|
#ifndef DEFAULT_DEVICE
|
|
# ifdef linux
|
|
char default_device[] = "eth0";
|
|
# else
|
|
# ifdef sun
|
|
char default_device[] = "le0";
|
|
# else
|
|
# ifdef ultrix
|
|
char default_device[] = "ln0";
|
|
# else
|
|
# ifdef __bsdi__
|
|
char default_device[] = "ef0";
|
|
# else
|
|
char default_device[] = "lan0";
|
|
# endif
|
|
# endif
|
|
# endif
|
|
# endif
|
|
#else
|
|
char default_device[] = DEFAULT_DEVICE;
|
|
#endif
|
|
|
|
|
|
static void usage __P((char *));
|
|
int main __P((int, char **));
|
|
|
|
|
|
static void usage(prog)
|
|
char *prog;
|
|
{
|
|
fprintf(stderr, "Usage: %s [options] <-r filename|-R filename>\n\
|
|
\t\t-r filename\tsnoop data file to resend\n\
|
|
\t\t-R filename\tlibpcap data file to resend\n\
|
|
\toptions:\n\
|
|
\t\t-d device\tSend out on this device\n\
|
|
\t\t-g gateway\tIP gateway to use if non-local dest.\n\
|
|
\t\t-m mtu\t\tfake MTU to use when sending out\n\
|
|
", prog);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
int main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
struct in_addr gwip;
|
|
struct ipread *ipr = NULL;
|
|
char *name = argv[0], *gateway = NULL, *dev = NULL;
|
|
char *resend = NULL;
|
|
int mtu = 1500, c;
|
|
|
|
while ((c = getopt(argc, argv, "EHPRSTXd:g:m:r:")) != -1)
|
|
switch (c)
|
|
{
|
|
case 'd' :
|
|
dev = optarg;
|
|
break;
|
|
case 'g' :
|
|
gateway = optarg;
|
|
break;
|
|
case 'm' :
|
|
mtu = atoi(optarg);
|
|
if (mtu < 28)
|
|
{
|
|
fprintf(stderr, "mtu must be > 28\n");
|
|
exit(1);
|
|
}
|
|
case 'r' :
|
|
resend = optarg;
|
|
break;
|
|
case 'R' :
|
|
opts |= OPT_RAW;
|
|
break;
|
|
#ifndef NO_IPF
|
|
case 'E' :
|
|
ipr = ðerf;
|
|
break;
|
|
case 'H' :
|
|
ipr = &iphex;
|
|
break;
|
|
case 'P' :
|
|
ipr = &pcap;
|
|
break;
|
|
case 'S' :
|
|
ipr = &snoop;
|
|
break;
|
|
case 'T' :
|
|
ipr = &tcpd;
|
|
break;
|
|
case 'X' :
|
|
ipr = &iptext;
|
|
break;
|
|
#endif
|
|
default :
|
|
fprintf(stderr, "Unknown option \"%c\"\n", c);
|
|
usage(name);
|
|
}
|
|
|
|
if (!ipr || !resend)
|
|
usage(name);
|
|
|
|
gwip.s_addr = 0;
|
|
if (gateway && resolve(gateway, (char *)&gwip) == -1)
|
|
{
|
|
fprintf(stderr,"Cant resolve %s\n", gateway);
|
|
exit(2);
|
|
}
|
|
|
|
if (!dev)
|
|
dev = default_device;
|
|
|
|
printf("Device: %s\n", dev);
|
|
printf("Gateway: %s\n", inet_ntoa(gwip));
|
|
printf("mtu: %d\n", mtu);
|
|
|
|
return ip_resend(dev, mtu, ipr, gwip, resend);
|
|
}
|