diff options
Diffstat (limited to 'usr.sbin/ipsend/ipresend/ipresend.c')
| -rw-r--r-- | usr.sbin/ipsend/ipresend/ipresend.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/usr.sbin/ipsend/ipresend/ipresend.c b/usr.sbin/ipsend/ipresend/ipresend.c new file mode 100644 index 00000000000..482811a4b53 --- /dev/null +++ b/usr.sbin/ipsend/ipresend/ipresend.c @@ -0,0 +1,140 @@ +/* + * 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[] = "@(#)ipresend.c 1.1 1/11/96 (C)1995 Darren Reed"; +#endif +#include <stdio.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; +extern struct ipread snoop, pcap; + +#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] <-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); +} + + +main(argc, argv) +int argc; +char **argv; +{ + struct in_addr gwip; + struct ipread *ipr = NULL; + char *name = argv[0], *gateway = NULL, *dev = NULL; + char c, *s, *resend = NULL; + int mtu = 1500; + + while ((c = getopt(argc, argv, "R:d:g:m:r:")) != -1) + switch (c) + { + case 'R' : + resend = optarg; + ipr = &pcap; + 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); + } + case 'r' : + resend = optarg; + ipr = &snoop; + break; + break; + 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); +} |