ssize_t send_cred_buffer(int, char*);
int recv_pattern(int fd, const char *pattern, size_t bufsize);
int init_tcp_socket(int port);
-void enable_crypt(int fd, crypt_function *recv, crypt_function *send,
+void enable_crypt(int fd, crypt_function *recv_f, crypt_function *send_f,
void *private_data);
void disable_crypt(int fd);