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net/tstun: clarify GROFilterFunc *gro.GRO usage (#13318)

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Updates #cleanup

Signed-off-by: Jordan Whited <jordan@tailscale.com>
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Jordan Whited 2024-08-29 13:04:46 -07:00 committed by GitHub
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commit 45c97751fb
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1 changed files with 4 additions and 3 deletions
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7
net/tstun/wrap.go
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@ -80,9 +80,10 @@
// throughput where GRO is supported by a packet.Parsed interceptor, e.g.
// netstack/gVisor, and we are handling a vector of packets. Callers must pass a
// nil g for the first packet in a given vector, and continue passing the
// returned *gro.GRO for all remaining packets in said vector. If g is non-nil
// after the last packet for a given vector is passed through the GROFilterFunc,
// the caller must also call g.Flush().
// returned *gro.GRO for all remaining packets in said vector. If the returned
// *gro.GRO is non-nil after the last packet for a given vector is passed
// through the GROFilterFunc, the caller must also call Flush() on it to deliver
// any previously Enqueue()'d packets.
type GROFilterFunc func(p *packet.Parsed, w *Wrapper, g *gro.GRO) (filter.Response, *gro.GRO)
// Wrapper augments a tun.Device with packet filtering and injection.