int recv_buffer(int, char *, ssize_t);
int recv_bin_buffer(int, char *, ssize_t);
int para_accept(int, void *addr, socklen_t size);
int recv_buffer(int, char *, ssize_t);
int recv_bin_buffer(int, char *, ssize_t);
int para_accept(int, void *addr, socklen_t size);