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darwin: Adds Check Empty Writes to TUN

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This commit is contained in:
Matthew Ellison
2017-05-22 12:00:06 -04:00
parent da7e7e0a3e
commit 4112fb9cd7
1 changed files with 5 additions and 0 deletions
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5
syscalls_darwin.go
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@@ -151,6 +151,11 @@ func (t *tunReadCloser) Read(to []byte) (int, error) {
} }
func (t *tunReadCloser) Write(from []byte) (int, error) { func (t *tunReadCloser) Write(from []byte) (int, error) {
if len(from) == 0 {
return 0, syscall.EIO
}
t.wMu.Lock() t.wMu.Lock()
defer t.wMu.Unlock() defer t.wMu.Unlock()