proxyarp: Add debug log entry on multicast-to-unicast conversion

This makes it easier to debug operations. The debug message is marked
EXCESSIVE, though, to avoid filling the logs with too much information
in default debugging cases.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/x_snoop.c

@@ -95,6 +95,10 @@ void x_snoop_mcast_to_ucast_convert_send(struct hostapd_data *hapd,
 	if (!(dst_addr[0] & 0x01))
 		return;
 
+	wpa_printf(MSG_EXCESSIVE, "x_snoop: Multicast-to-unicast conversion "
+		   MACSTR " -> " MACSTR " (len %u)",
+		   MAC2STR(dst_addr), MAC2STR(sta->addr), (unsigned int) len);
+
 	/* save the multicast destination address for restoring it later */
 	os_memcpy(addr, buf, ETH_ALEN);