-int tcpip_close(COMSTACK h);
-int tcpip_put(COMSTACK h, char *buf, int size);
-int tcpip_get(COMSTACK h, char **buf, int *bufsize);
-int tcpip_connect(COMSTACK h, void *address);
-int tcpip_more(COMSTACK h);
-int tcpip_rcvconnect(COMSTACK h);
-int tcpip_bind(COMSTACK h, void *address, int mode);
-int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
+static int tcpip_close(COMSTACK h);
+static int tcpip_put(COMSTACK h, char *buf, int size);
+static int tcpip_get(COMSTACK h, char **buf, int *bufsize);
+static int tcpip_connect(COMSTACK h, void *address);
+static int tcpip_more(COMSTACK h);
+static int tcpip_rcvconnect(COMSTACK h);
+static int tcpip_bind(COMSTACK h, void *address, int mode);
+static int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,