3551     pub fn socket(domain: c_int, ty: c_int, protocol: c_int) -> c_int;  in socket()  function
3552     pub fn connect(socket: c_int, address: *const sockaddr, len: socklen_t) -> c_int;  in connect()
3553     pub fn listen(socket: c_int, backlog: c_int) -> c_int;  in listen()
3554     pub fn accept(socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int;  in accept()
3555     pub fn getpeername(socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t)  in getpeername()
3557     pub fn getsockname(socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t)  in getsockname()
3560         socket: c_int,  in setsockopt()
3573         socket: c_int,  in sendto()
3580     pub fn shutdown(socket: c_int, how: c_int) -> c_int;  in shutdown()
3852     pub fn send(socket: c_int, buf: *const c_void, len: size_t, flags: c_int) -> ssize_t;  in send()
3853     pub fn recv(socket: c_int, buf: *mut c_void, len: size_t, flags: c_int) -> ssize_t;  in recv()
4119         socket: c_int,  in recvfrom()
4131         socket: c_int,  in bind()