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-rw-r--r--extensions/libipt_ipv4options.c60
1 files changed, 53 insertions, 7 deletions
diff --git a/extensions/libipt_ipv4options.c b/extensions/libipt_ipv4options.c
index e99c96c..c7bd876 100644
--- a/extensions/libipt_ipv4options.c
+++ b/extensions/libipt_ipv4options.c
@@ -13,13 +13,14 @@ static void
help(void)
{
printf(
-"IPV4OPTIONS v%s options:\n"
-" --ssrr (match strict source routing flag)\n"
-" --lsrr (match loose source routing flag)\n"
-" --no-srr (match packets with no source routing)\n\n"
-" [!] --rr (match record route flag)\n\n"
-" [!] --ts (match timestamp flag)\n\n"
-" [!] --ra (match router-alert option)\n\n",
+"ipv4options v%s options:\n"
+" --ssrr (match strict source routing flag)\n"
+" --lsrr (match loose source routing flag)\n"
+" --no-srr (match packets with no source routing)\n\n"
+" [!] --rr (match record route flag)\n\n"
+" [!] --ts (match timestamp flag)\n\n"
+" [!] --ra (match router-alert option)\n\n"
+" [!] --any-opt (match any option or no option at all if used with '!')\n",
NETFILTER_VERSION);
}
@@ -30,6 +31,7 @@ static struct option opts[] = {
{ "rr", 0, 0, '4'},
{ "ts", 0, 0, '5'},
{ "ra", 0, 0, '6'},
+ { "any-opt", 0, 0, '7'},
{0}
};
@@ -180,6 +182,42 @@ parse(int c, char **argv, int invert, unsigned int *flags,
}
break;
+ /* any option */
+ case '7' :
+ if ((!invert) && (*flags & IPT_IPV4OPTION_MATCH_ANY_OPT))
+ exit_error(PARAMETER_PROBLEM,
+ "Can't specify --any-opt twice");
+ if (invert && (*flags & IPT_IPV4OPTION_MATCH_ANY_OPT))
+ exit_error(PARAMETER_PROBLEM,
+ "Can't specify ! --any-opt with --any-opt");
+ if (invert && (*flags & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT))
+ exit_error(PARAMETER_PROBLEM,
+ "Can't specify ! --any-opt twice");
+ if ((!invert) &&
+ ((*flags & IPT_IPV4OPTION_DONT_MATCH_SRR) ||
+ (*flags & IPT_IPV4OPTION_DONT_MATCH_RR) ||
+ (*flags & IPT_IPV4OPTION_DONT_MATCH_TIMESTAMP) ||
+ (*flags & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT)))
+ exit_error(PARAMETER_PROBLEM,
+ "Can't specify --any-opt with any other negative ipv4options match");
+ if (invert &&
+ ((*flags & IPT_IPV4OPTION_MATCH_LSRR) ||
+ (*flags & IPT_IPV4OPTION_MATCH_SSRR) ||
+ (*flags & IPT_IPV4OPTION_MATCH_RR) ||
+ (*flags & IPT_IPV4OPTION_MATCH_TIMESTAMP) ||
+ (*flags & IPT_IPV4OPTION_MATCH_ROUTER_ALERT)))
+ exit_error(PARAMETER_PROBLEM,
+ "Can't specify ! --any-opt with any other positive ipv4options match");
+ if (invert) {
+ info->options |= IPT_IPV4OPTION_DONT_MATCH_ANY_OPT;
+ *flags |= IPT_IPV4OPTION_DONT_MATCH_ANY_OPT;
+ }
+ else {
+ info->options |= IPT_IPV4OPTION_MATCH_ANY_OPT;
+ *flags |= IPT_IPV4OPTION_MATCH_ANY_OPT;
+ }
+ break;
+
default:
return 0;
}
@@ -221,6 +259,10 @@ print(const struct ipt_ip *ip,
printf(" RA");
else if (info->options & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT)
printf(" !RA");
+ if (info->options & IPT_IPV4OPTION_MATCH_ANY_OPT)
+ printf(" ANYOPT ");
+ else if (info->options & IPT_IPV4OPTION_DONT_MATCH_ANY_OPT)
+ printf(" NOOPT");
printf(" ");
}
@@ -249,6 +291,10 @@ save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
printf(" --ra");
else if (info->options & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT)
printf(" ! --ra");
+ if (info->options & IPT_IPV4OPTION_MATCH_ANY_OPT)
+ printf(" --any-opt");
+ if (info->options & IPT_IPV4OPTION_DONT_MATCH_ANY_OPT)
+ printf(" ! --any-opt");
printf(" ");
}