diff options
Diffstat (limited to 'tun/tun_windows.go')
| -rw-r--r-- | tun/tun_windows.go | 64 |
1 files changed, 35 insertions, 29 deletions
diff --git a/tun/tun_windows.go b/tun/tun_windows.go index a28dce9..583ff6b 100644 --- a/tun/tun_windows.go +++ b/tun/tun_windows.go @@ -8,6 +8,7 @@ package tun import ( "errors" "fmt" + "io" "os" "sync" "time" @@ -230,6 +231,7 @@ func (tun *NativeTun) Read(buff []byte, offset int) (int, error) { default: } + retries := 1000 for { if tun.rdBuff.offset+packetExchangeAlignment <= tun.rdBuff.avail { // Get packet from the exchange buffer. @@ -255,31 +257,31 @@ func (tun *NativeTun) Read(buff []byte, offset int) (int, error) { return 0, err } - // Fill queue. - retries := 1000 - for { - n, err := file.Read(tun.rdBuff.data[:]) - if err != nil { - tun.rdBuff.offset = 0 - tun.rdBuff.avail = 0 - pe, ok := err.(*os.PathError) - if tun.close { - return 0, os.ErrClosed - } - if retries > 0 && ok && pe.Err == windows.ERROR_OPERATION_ABORTED { - retries-- - continue - } - if ok && pe.Err == windows.ERROR_HANDLE_EOF { - tun.closeTUN() - break - } - return 0, err - } + n, err := file.Read(tun.rdBuff.data[:]) + if err != nil { tun.rdBuff.offset = 0 - tun.rdBuff.avail = uint32(n) - break + tun.rdBuff.avail = 0 + pe, ok := err.(*os.PathError) + if tun.close { + return 0, os.ErrClosed + } + if retries > 0 && ok && (pe.Err == windows.ERROR_HANDLE_EOF || pe.Err == windows.ERROR_OPERATION_ABORTED) { + retries-- + tun.closeTUN() + time.Sleep(time.Millisecond * 2) + continue + } + return 0, err } + if n == 0 { + if retries == 0 { + return 0, io.ErrShortBuffer + } + retries-- + continue + } + tun.rdBuff.offset = 0 + tun.rdBuff.avail = uint32(n) } } @@ -289,6 +291,11 @@ func (tun *NativeTun) Flush() error { if tun.wrBuff.offset == 0 { return nil } + defer func() { + tun.wrBuff.packetNum = 0 + tun.wrBuff.offset = 0 + }() + retries := 1000 for { // Get TUN data pipe. @@ -297,23 +304,22 @@ func (tun *NativeTun) Flush() error { return err } - // Flush write buffer. - retries := 1000 for { _, err = file.Write(tun.wrBuff.data[:tun.wrBuff.offset]) - tun.wrBuff.packetNum = 0 - tun.wrBuff.offset = 0 if err != nil { pe, ok := err.(*os.PathError) if tun.close { return os.ErrClosed } - if retries > 0 && ok && pe.Err == windows.ERROR_OPERATION_ABORTED { + if retries > 0 && ok && pe.Err == windows.ERROR_OPERATION_ABORTED { // Adapter is paused or in low-power state. retries-- + time.Sleep(time.Millisecond * 2) continue } - if ok && pe.Err == windows.ERROR_HANDLE_EOF { + if retries > 0 && ok && pe.Err == windows.ERROR_HANDLE_EOF { // Adapter is going down. + retries-- tun.closeTUN() + time.Sleep(time.Millisecond * 2) break } return err |