void CtdlDirectoryInit(void);
void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr);
void CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr);
-int CtdlDirectoryLookup(char *target, char *internet_addr);
+int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen);
struct CtdlMessage *convert_internet_message(char *rfc822);
int CtdlHostAlias(char *fqdn);