+extern const char *isonsap_string(const u_char *, register u_int);
+extern const char *dnaddr_string(netdissect_options *, u_short);
+extern const char *protoid_string(const u_char *);
+extern const char *ipxsap_string(u_short);
+extern const char *getname(netdissect_options *, const u_char *);