Add support for older kernel and iptables versions

1 files changed, 25 insertions, 5 deletions

diff --git a/libip6t_SNPTV6.c b/libip6t_SNPTV6.c
index 3bcc66e..267a27a 100644
--- a/libip6t_SNPTV6.c
+++ b/libip6t_SNPTV6.c
@@ -16,15 +16,35 @@ static void SNPTV6_help(void)
 	NPTV6_help_note();
 }
 
+static int SNPTV6_parse(int c, char **argv, int invert, unsigned int *flags, const void *entry, struct xt_entry_target **target)
+{
+	struct ip6t_nptv6_info* info = (struct ip6t_nptv6_info*)(*target)->data;
+
+	switch(c) {
+	case 0:
+		if (!optarg) {
+			xtables_error(PARAMETER_PROBLEM, "--to-source: No prefix given");
+		}
+		if (invert) {
+			xtables_error(PARAMETER_PROBLEM, "Unexpected `!' after --to-source");
+		}
+
+		NPTV6_parse_to(optarg, info);
+		return 1;
+	}
+
+	return 0;
+}
+
 static void SNPTV6_save(const void *ip, const struct xt_entry_target *target)
 {
 	const struct ip6t_nptv6_info* info = (struct ip6t_nptv6_info*)target->data;
 	printf(" --to-source %s/%d ", xtables_ip6addr_to_numeric(&info->nptv6_prefix), info->nptv6_prefix_len);
 }
 
-static const struct xt_option_entry SNPTV6_opts[] = {
-	{.name = "to-source", .id = 0, .type = XTTYPE_STRING, .flags = XTOPT_MAND},
-	XTOPT_TABLEEND,
+static const struct option SNPTV6_opts[] = {
+	{.name = "to-source", .has_arg = required_argument, .flag = NULL, .val = 0},
+	{.name = NULL},
 };
 
 static struct xtables_target SNPTV6_tg6_reg = {
@@ -34,10 +54,10 @@ static struct xtables_target SNPTV6_tg6_reg = {
 	.size		= XT_ALIGN(sizeof(struct ip6t_nptv6_info)),
 	.userspacesize	= XT_ALIGN(sizeof(struct ip6t_nptv6_info)),
 	.help		= SNPTV6_help,
-	.x6_parse	= NPTV6_parse,
+	.parse		= SNPTV6_parse,
 	.print          = NPTV6_print,
 	.save		= SNPTV6_save,
-	.x6_options	= SNPTV6_opts,
+	.extra_opts	= SNPTV6_opts,
 };
 
 void _init(void)