int main(int argc, char *argv[])
{
char *host = "localhost";
struct libicmp *obj;
if (argc >= 2)
host = argv[1];
if (!(obj = icmp_open(host, 0x1337, 0)))
return 1;
return icmp_ping(obj, 0, 0) == -1;
}
int main(int argc, char **argv)
{
struct hostent *hp;
void (*action)(void) = NULL;
char *target;
int opt;
while ((opt = getopt(argc, argv, "DdIi:")) != -1) {
switch (opt) {
case 'D':
action = do_discover_and_write;
break;
case 'd':
action = do_discover;
break;
case 'i':
action = do_inject;
mtu_size = atoi(optarg);
break;
case 'I':
action = do_inject_pmtu;
break;
default:
usage();
}
}
if (action == NULL || optind >= argc)
usage();
target = argv[optind];
fd = icmp_open(1.0);
if (fd < 0)
exit(1);
memset((char *) &to, 0, sizeof(to));
to.sin_family = AF_INET;
if (inet_aton(target, &to.sin_addr) != 1) {
hp = gethostbyname(target);
if (!hp) {
fprintf(stderr, "mtu: unknown host %s\n", target);
exit(2);
}
memcpy(&to.sin_addr, hp->h_addr, 4);
}
action();
}