- force user to specify --icmpv6-type if icmpv6 match is required to load
- Don't allow multiple --icmp-type/icmpv6-type
(Closes: #461)
diff --git a/extensions/libip6t_icmp6.c b/extensions/libip6t_icmp6.c
index a29bb38..6940d0e 100644
--- a/extensions/libip6t_icmp6.c
+++ b/extensions/libip6t_icmp6.c
@@ -164,11 +164,15 @@
switch (c) {
case '1':
+ if (*flags == 1)
+ exit_error(PARAMETER_PROBLEM,
+ "icmpv6 match: only use --icmpv6-type once!");
check_inverse(optarg, &invert, &optind, 0);
parse_icmpv6(argv[optind-1], &icmpv6info->type,
icmpv6info->code);
if (invert)
icmpv6info->invflags |= IP6T_ICMP_INV;
+ *flags = 1;
break;
default:
@@ -247,9 +251,11 @@
printf(" ");
}
-/* Final check; we don't care. */
static void final_check(unsigned int flags)
{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "icmpv6 match: You must specify `--icmpv6-type'");
}
static struct ip6tables_match icmpv6 = {