diff --git a/zebra/zserv.h b/zebra/zserv.h
index 9d65998..7a2b4a1 100644
--- a/zebra/zserv.h
+++ b/zebra/zserv.h
@@ -67,6 +67,9 @@
 
   /* Router-id information. */
   vrf_bitmap_t ridinfo;
+
+  /* client's protocol */
+  u_char proto;
 };
 
 /* Zebra instance */
@@ -112,4 +115,7 @@
 
 extern pid_t pid;
 
+extern void zserv_create_header(struct stream *s, uint16_t cmd, vrf_id_t);
+extern int zebra_server_send_message(struct zserv *client);
+
 #endif /* _ZEBRA_ZEBRA_H */