github.com/metacubex/sing-tun@v0.2.7-0.20240512075008-89e7c6208eec/stack_gvisor_err.go (about) 1 //go:build with_gvisor 2 3 package tun 4 5 import ( 6 "net" 7 8 E "github.com/sagernet/sing/common/exceptions" 9 10 "github.com/metacubex/gvisor/pkg/tcpip" 11 "github.com/metacubex/gvisor/pkg/tcpip/adapters/gonet" 12 ) 13 14 type gTCPConn struct { 15 *gonet.TCPConn 16 } 17 18 func (c *gTCPConn) Upstream() any { 19 return c.TCPConn 20 } 21 22 func (c *gTCPConn) Write(b []byte) (n int, err error) { 23 n, err = c.TCPConn.Write(b) 24 if err == nil { 25 return 26 } 27 err = wrapError(err) 28 return 29 } 30 31 func wrapStackError(err tcpip.Error) error { 32 switch err.(type) { 33 case *tcpip.ErrClosedForSend, 34 *tcpip.ErrClosedForReceive, 35 *tcpip.ErrAborted: 36 return net.ErrClosed 37 } 38 return E.New(err.String()) 39 } 40 41 func wrapError(err error) error { 42 if opErr, isOpErr := err.(*net.OpError); isOpErr { 43 switch opErr.Err.Error() { 44 case "endpoint is closed for send", 45 "endpoint is closed for receive", 46 "operation aborted": 47 return net.ErrClosed 48 } 49 } 50 return err 51 }