Fix issue with dst_port when filter logging is disabled.

src/xdp/prog.c

@@ -341,7 +341,9 @@ int xdp_prog_main(struct xdp_md *ctx)
     rule.now = now;
     rule.pkt_len = pkt_len;
     rule.src_port = src_port;
+#ifdef ENABLE_FILTER_LOGGING
     rule.dst_port = dst_port;
+#endif
     rule.protocol = protocol;
 
     rule.iph = iph;

src/xdp/utils/rule.h

@@ -28,7 +28,9 @@ struct rule_ctx
     u64 now;
     int pkt_len;
     u16 src_port;
+#ifdef ENABLE_FILTER_LOGGING
     u16 dst_port;
+#endif
     u8 protocol;
 
     struct iphdr* iph;