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conn,device: provide 8 free bytes at packet head to conn.Bind.Send()

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This enables a conn.Bind to bring its own encapsulating transport, e.g.
VXLAN/Geneve.

Updates tailscale/corp#27502

Signed-off-by: Jordan Whited <jordan@tailscale.com>
This commit is contained in:
Jordan Whited 2025-05-30 13:14:43 -07:00 • committed by Jordan Whited
parent 022546570f
commit 65cd6eed7d
10 changed files with 58 additions and 39 deletions
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3
conn/bindtest/bindtest.go
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@ -107,8 +107,9 @@ func (c *ChannelBind) makeReceiveFunc(ch chan []byte) conn.ReceiveFunc {
}
}
func (c *ChannelBind) Send(bufs [][]byte, ep conn.Endpoint) error {
func (c *ChannelBind) Send(bufs [][]byte, ep conn.Endpoint, offset int) error {
for _, b := range bufs {
b = b[offset:]
select {
case <-c.closeSignal:
return net.ErrClosed