+extern int (*request_handlers[])(connection_t*);
+
+extern int send_id(connection_t*);
+extern int send_metakey(connection_t*);
+extern int send_challenge(connection_t*);
+extern int send_chal_reply(connection_t*);
+extern int send_ack(connection_t*);
+extern int send_status(connection_t*, int, char*);
+extern int send_error(connection_t*, int, char*);
+extern int send_termreq(connection_t*);
+extern int send_ping(connection_t*);
+extern int send_pong(connection_t*);
+extern int send_add_node(connection_t*, node_t*);
+extern int send_del_node(connection_t*, node_t*);
+extern int send_add_subnet(connection_t*, subnet_t*);
+extern int send_del_subnet(connection_t*, subnet_t*);
+extern int send_add_edge(connection_t*, edge_t*);
+extern int send_del_edge(connection_t*, edge_t*);
+extern int send_key_changed(connection_t*, node_t*);
+extern int send_req_key(connection_t*, node_t*, node_t*);
+extern int send_ans_key(connection_t*, node_t*, node_t*, char*);
+extern int send_tcppacket(connection_t *, vpn_packet_t *);