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/*
* ipsend.c (C) 1995 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.
*
* The author provides this program as-is, with no gaurantee for its
* suitability for any specific purpose. The author takes no responsibility
* for the misuse/abuse of this program and provides it for the sole purpose
* of testing packet filter policies. This file maybe distributed freely
* providing it is not modified and that this notice remains in tact.
*
* This was written and tested (successfully) on SunOS 4.1.x.
*/
#ifndef lint
static char sccsid[] = "%W% %G% (C)1995 Darren Reed";
#endif
#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.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>
#include <netinet/tcpip.h>
#endif
#include "ip_compat.h"
#ifdef linux
#include <linux/sockios.h>
#include "tcpip.h"
#endif
#include "ipt.h"
extern char *optarg;
extern int optind;
char options[68];
#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
void usage(prog)
char *prog;
{
fprintf(stderr, "Usage: %s [options] dest\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\
\t\t-p pointtest\t\n\
\t\t-s src\t\tsource address for IP packet\n\
\t\t-1 \t\tPerform test 1 (IP header)\n\
\t\t-2 \t\tPerform test 2 (IP options)\n\
\t\t-3 \t\tPerform test 3 (ICMP)\n\
\t\t-4 \t\tPerform test 4 (UDP)\n\
\t\t-5 \t\tPerform test 5 (TCP)\n\
\t\t-6 \t\tPerform test 6 (overlapping fragments)\n\
\t\t-7 \t\tPerform test 7 (random packets)\n\
", prog);
exit(1);
}
main(argc, argv)
int argc;
char **argv;
{
struct tcpiphdr *ti;
struct in_addr gwip;
ip_t *ip;
char *name = argv[0], host[64], *gateway = NULL, *dev = NULL;
char *src = NULL, *dst, *s;
int mtu = 1500, tests = 0, pointtest = 0, c;
/*
* 65535 is maximum packet size...you never know...
*/
ip = (ip_t *)calloc(1, 65536);
ti = (struct tcpiphdr *)ip;
ip->ip_len = sizeof(*ip);
ip->ip_hl = sizeof(*ip) >> 2;
while ((c = getopt(argc, argv, "1234567IP:TUd:f:g:m:o:p:s:t:")) != -1)
switch (c)
{
case '1' :
case '2' :
case '3' :
case '4' :
case '5' :
case '6' :
case '7' :
tests = c - '0';
break;
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);
}
break;
case 'p' :
pointtest = atoi(optarg);
break;
case 's' :
src = optarg;
break;
default :
fprintf(stderr, "Unknown option \"%c\"\n", c);
usage(name);
}
if (argc - optind < 2 && !tests)
usage(name);
dst = argv[optind++];
if (!src)
{
gethostname(host, sizeof(host));
src = host;
}
if (resolve(dst, (char *)&ip->ip_dst) == -1)
{
fprintf(stderr,"Cant resolve %s\n", dst);
exit(2);
}
if (resolve(src, (char *)&ip->ip_src) == -1)
{
fprintf(stderr,"Cant resolve %s\n", src);
exit(2);
}
if (!gateway)
gwip = ip->ip_dst;
else if (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("Source: %s\n", inet_ntoa(ip->ip_src));
printf("Dest: %s\n", inet_ntoa(ip->ip_dst));
printf("Gateway: %s\n", inet_ntoa(gwip));
printf("mtu: %d\n", mtu);
switch (tests)
{
case 1 :
return ip_test1(dev, mtu, ti, gwip, pointtest);
case 2 :
return ip_test2(dev, mtu, ti, gwip, pointtest);
case 3 :
return ip_test3(dev, mtu, ti, gwip, pointtest);
case 4 :
return ip_test4(dev, mtu, ti, gwip, pointtest);
case 5 :
return ip_test5(dev, mtu, ti, gwip, pointtest);
case 6 :
return ip_test6(dev, mtu, ti, gwip, pointtest);
case 7 :
return ip_test7(dev, mtu, ti, gwip, pointtest);
default :
break;
}
return 0;
}
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