+extern void send_packet(connection_t *, vpn_packet_t *);
+extern void receive_packet(connection_t *, vpn_packet_t *);
+extern void receive_tcppacket(connection_t *, char *, int);
+extern void accept_packet(vpn_packet_t *);
+extern void broadcast_packet(connection_t *, vpn_packet_t *);