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34 lines
589 B
Go
34 lines
589 B
Go
// +build darwin freebsd openbsd
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package tun
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import (
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"github.com/xjasonlyu/tun2socks/common/pool"
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)
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const (
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offset = 4 /* 4 bytes TUN_PI */
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defaultMTU = 1500
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)
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func (t *TUN) Read(packet []byte) (n int, err error) {
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buf := pool.Get(offset + len(packet))
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defer pool.Put(buf)
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if n, err = t.nt.Read(buf, offset); err != nil {
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return
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}
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copy(packet, buf[offset:offset+n])
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return
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}
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func (t *TUN) Write(packet []byte) (int, error) {
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buf := pool.Get(offset + len(packet))
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defer pool.Put(buf)
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copy(buf[offset:], packet)
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return t.nt.Write(buf[:offset+len(packet)], offset)
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}
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