16     syscall::{Syscall, SystemError},
34     ) -> Result<usize, SystemError> {  in socket()  argument
49                     return Err(SystemError::EINVAL);  in socket()
54                 return Err(SystemError::EAFNOSUPPORT);  in socket()
79     ) -> Result<usize, SystemError> {  in setsockopt()  argument
82             .ok_or(SystemError::EBADF)?;  in setsockopt()
103     ) -> Result<usize, SystemError> {  in getsockopt()  argument
108             .ok_or(SystemError::EBADF)?;  in getsockopt()
113                 .map_err(|_| SystemError::ENOPROTOOPT)?;  in getsockopt()
133                     return Err(SystemError::ENOPROTOOPT);  in getsockopt()
146             PosixIpProtocol::try_from(level as u16).map_err(|_| SystemError::ENOPROTOOPT)?;  in getsockopt()
149                 .map_err(|_| SystemError::ENOPROTOOPT)?;  in getsockopt()
153                     return Err(SystemError::ENOPROTOOPT);  in getsockopt()
157         return Err(SystemError::ENOPROTOOPT);  in getsockopt()
167     pub fn connect(fd: usize, addr: *const SockAddr, addrlen: usize) -> Result<usize, SystemError> {  in connect()  argument
171             .ok_or(SystemError::EBADF)?;  in connect()
185     pub fn bind(fd: usize, addr: *const SockAddr, addrlen: usize) -> Result<usize, SystemError> {  in bind()  argument
189             .ok_or(SystemError::EBADF)?;  in bind()
210     ) -> Result<usize, SystemError> {  in sendto()  argument
219             .ok_or(SystemError::EBADF)?;  in sendto()
239     ) -> Result<usize, SystemError> {  in recvfrom()  argument
242             .ok_or(SystemError::EBADF)?;  in recvfrom()
267     pub fn recvmsg(fd: usize, msg: &mut MsgHdr, _flags: u32) -> Result<usize, SystemError> {  in recvmsg()  argument
273             .ok_or(SystemError::EBADF)?;  in recvmsg()
299     pub fn listen(fd: usize, backlog: usize) -> Result<usize, SystemError> {  in listen()  argument
302             .ok_or(SystemError::EBADF)?;  in listen()
314     pub fn shutdown(fd: usize, how: usize) -> Result<usize, SystemError> {  in shutdown()  argument
317             .ok_or(SystemError::EBADF)?;  in shutdown()
330     pub fn accept(fd: usize, addr: *mut SockAddr, addrlen: *mut u32) -> Result<usize, SystemError> {  in accept()  argument
333             .ok_or(SystemError::EBADF)?;  in accept()
370     ) -> Result<usize, SystemError> {  in getsockname()  argument
372             return Err(SystemError::EINVAL);  in getsockname()
376             .ok_or(SystemError::EBADF)?;  in getsockname()
378         let endpoint: Endpoint = socket.endpoint().ok_or(SystemError::EINVAL)?;  in getsockname()
399     ) -> Result<usize, SystemError> {  in getpeername()  argument
401             return Err(SystemError::EINVAL);  in getpeername()
406             .ok_or(SystemError::EBADF)?;  in getpeername()
408         let endpoint: Endpoint = socket.peer_endpoint().ok_or(SystemError::EINVAL)?;  in getpeername()
477     pub fn to_endpoint(addr: *const SockAddr, len: usize) -> Result<Endpoint, SystemError> {  in to_endpoint()  argument
485             return Err(SystemError::EFAULT);  in to_endpoint()
488         let addr = unsafe { addr.as_ref() }.ok_or(SystemError::EFAULT)?;  in to_endpoint()
490             return Err(SystemError::EINVAL);  in to_endpoint()
506                     return Err(SystemError::EINVAL);  in to_endpoint()
510                     return Err(SystemError::EINVAL);  in to_endpoint()
513                     return Err(SystemError::EINVAL);  in to_endpoint()
516                     return Err(SystemError::EINVAL);  in to_endpoint()
523     pub fn len(&self) -> Result<usize, SystemError> {  in len()  argument
528             AddressFamily::Unix => Err(SystemError::EINVAL),  in len()
529             _ => Err(SystemError::EINVAL),  in len()
545     ) -> Result<usize, SystemError> {  in write_to_user()  argument
556             return Err(SystemError::EFAULT);  in write_to_user()
702     type Error = SystemError;
707             None => Err(SystemError::EPROTONOSUPPORT),  in try_from()
823     type Error = SystemError;
828             None => Err(SystemError::EINVAL),  in try_from()
912     type Error = SystemError;
917             None => Err(SystemError::EINVAL),  in try_from()