13         event_poll::EPollEventType, net_core::poll_ifaces, Endpoint, Protocol, ShutdownType,
107     fn read(&self, buf: &mut [u8]) -> (Result<usize, SystemError>, Endpoint) {  in read()  argument
120                         Endpoint::Ip(Some(wire::IpEndpoint {  in read()
129                         return (Err(SystemError::EAGAIN_OR_EWOULDBLOCK), Endpoint::Ip(None));  in read()
138     fn write(&self, buf: &[u8], to: Option<Endpoint>) -> Result<usize, SystemError> {  in write()
155             if let Some(Endpoint::Ip(Some(endpoint))) = to {  in write()
214     fn connect(&mut self, _endpoint: Endpoint) -> Result<(), SystemError> {  in connect()
245     remote_endpoint: Option<Endpoint>, // 记录远程endpoint提供给connect()， 应该使用IP地址。
296     fn do_bind(&self, socket: &mut udp::Socket, endpoint: Endpoint) -> Result<(), SystemError> {  in do_bind()
297         if let Endpoint::Ip(Some(mut ip)) = endpoint {  in do_bind()
338     fn read(&self, buf: &mut [u8]) -> (Result<usize, SystemError>, Endpoint) {  in read()  argument
352                     return (Ok(size), Endpoint::Ip(Some(metadata.endpoint)));  in read()
363     fn write(&self, buf: &[u8], to: Option<Endpoint>) -> Result<usize, SystemError> {  in write()
366             if let Some(Endpoint::Ip(Some(ref endpoint))) = to {  in write()
368             } else if let Some(Endpoint::Ip(Some(ref endpoint))) = self.remote_endpoint {  in write()
400     fn bind(&mut self, endpoint: Endpoint) -> Result<(), SystemError> {  in bind()
421     fn connect(&mut self, endpoint: Endpoint) -> Result<(), SystemError> {  in connect()
422         if let Endpoint::Ip(_) = endpoint {  in connect()
448     fn endpoint(&self) -> Option<Endpoint> {  in endpoint()  argument
465             return Some(Endpoint::Ip(Some(result)));  in endpoint()
469     fn peer_endpoint(&self) -> Option<Endpoint> {  in peer_endpoint()  argument
618     fn read(&self, buf: &mut [u8]) -> (Result<usize, SystemError>, Endpoint) {  in read()  argument
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()
655                             return (Ok(size), Endpoint::Ip(Some(endpoint)));  in read()
660                         return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
670                         return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
674                 return (Err(SystemError::ENOTCONN), Endpoint::Ip(None));  in read()
682     fn write(&self, buf: &[u8], _to: Option<Endpoint>) -> Result<usize, SystemError> {  in write()
743     fn connect(&mut self, endpoint: Endpoint) -> Result<(), SystemError> {  in connect()
750         if let Endpoint::Ip(Some(ip)) = endpoint {  in connect()
853     fn bind(&mut self, endpoint: Endpoint) -> Result<(), SystemError> {  in bind()
854         if let Endpoint::Ip(Some(mut ip)) = endpoint {  in bind()
881     fn accept(&mut self) -> Result<(Box<dyn Socket>, Endpoint), SystemError> {  in accept()  argument
955                 return Ok((sock_ret, Endpoint::Ip(Some(remote_ep))));  in accept()
966     fn endpoint(&self) -> Option<Endpoint> {  in endpoint()  argument
967         let mut result: Option<Endpoint> = self.local_endpoint.map(|x| Endpoint::Ip(Some(x)));  in endpoint()
976                 result = Some(Endpoint::Ip(Some(ep)));  in endpoint()
982     fn peer_endpoint(&self) -> Option<Endpoint> {  in peer_endpoint()  argument
988         return socket.remote_endpoint().map(|x| Endpoint::Ip(Some(x)));  in peer_endpoint()