126                 Err(_) => {  in read()
129                         return (Err(SystemError::EAGAIN_OR_EWOULDBLOCK), Endpoint::Ip(None));  in read()
148                 Err(raw::SendError::BufferFull) => {  in write()
149                     return Err(SystemError::ENOBUFS);  in write()
167                     return Err(SystemError::ENETUNREACH);  in write()
205                     return Err(SystemError::EINVAL);  in write()
209                 return Err(SystemError::ENOTCONN);  in write()
313                 Err(_) => return Err(SystemError::EINVAL),  in do_bind()
316             return Err(SystemError::EINVAL);  in do_bind()
371                 return Err(SystemError::ENOTCONN);  in write()
389                 Err(_) => {  in write()
391                     return Err(SystemError::ENOBUFS);  in write()
396             return Err(SystemError::ENOBUFS);  in write()
426             Err(SystemError::EINVAL)  in connect()
560             Err(_) => Err(SystemError::EINVAL),  in do_listen()
626             return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
640                 return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
650                                 return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
658                     Err(tcp::RecvError::InvalidState) => {  in read()
660                         return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
662                     Err(tcp::RecvError::Finished) => {  in read()
670                         return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
674                 return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
690             return Err(SystemError::ENOTCONN);  in write()
707                     Err(e) => {  in write()
709                         return Err(SystemError::ENOBUFS);  in write()
713                 return Err(SystemError::ENOBUFS);  in write()
717         return Err(SystemError::ENOTCONN);  in write()
782                                 return Err(SystemError::ECONNREFUSED);  in connect()
787                 Err(e) => {  in connect()
790                         tcp::ConnectError::InvalidState => return Err(SystemError::EISCONN),  in connect()
791                         tcp::ConnectError::Unaddressable => return Err(SystemError::EADDRNOTAVAIL),  in connect()
796             return Err(SystemError::EINVAL);  in connect()
868         return Err(SystemError::EINVAL);  in bind()
883             return Err(SystemError::EINVAL);  in accept()