Properly dereference struct ether_addr

[project/firewall3.git] / iptables.c

diff --git a/iptables.c b/iptables.c
index 7d91452..694dd4f 100644 (file)
--- a/iptables.c
+++ b/iptables.c
@@ -746,11 +746,17 @@ fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
 void
 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
 {
+       char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
+       uint8_t *addr = mac->mac.ether_addr_octet;
+
        if (!mac)
                return;
 
+       sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
+               addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+
        fw3_ipt_rule_addarg(r, false, "-m", "mac");
-       fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", ether_ntoa(&mac->mac));
+       fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", buf);
 }
 
 void