libxt_mac: flatten casts in libxt_mac

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 8 insertions, 5 deletions

diff --git a/extensions/libxt_mac.c b/extensions/libxt_mac.c
index a842ee9b..bc91f0f4 100644
--- a/extensions/libxt_mac.c
+++ b/extensions/libxt_mac.c
@@ -74,7 +74,7 @@ mac_parse(int c, char **argv, int invert, unsigned int *flags,
 	return 1;
 }
 
-static void print_mac(unsigned char macaddress[ETH_ALEN])
+static void print_mac(const unsigned char macaddress[ETH_ALEN])
 {
 	unsigned int i;
 
@@ -96,22 +96,25 @@ static void mac_check(unsigned int flags)
 static void
 mac_print(const void *ip, const struct xt_entry_match *match, int numeric)
 {
+	const struct xt_mac_info *info = (void *)match->data;
 	printf("MAC ");
 
-	if (((struct xt_mac_info *)match->data)->invert)
+	if (info->invert)
 		printf("! ");
 	
-	print_mac(((struct xt_mac_info *)match->data)->srcaddr);
+	print_mac(info->srcaddr);
 }
 
 /* Saves the union ipt_matchinfo in parsable form to stdout. */
 static void mac_save(const void *ip, const struct xt_entry_match *match)
 {
-	if (((struct xt_mac_info *)match->data)->invert)
+	const struct xt_mac_info *info = (void *)match->data;
+
+	if (info->invert)
 		printf("! ");
 
 	printf("--mac-source ");
-	print_mac(((struct xt_mac_info *)match->data)->srcaddr);
+	print_mac(info->srcaddr);
 }
 
 static struct xtables_match mac_match = {