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zero copy even with virtioheder

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This commit is contained in:
Jay Wren
2025-11-19 12:03:38 -05:00
parent 518a78c9d2
commit 8b32382cd9
5 changed files with 27 additions and 63 deletions
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11
outside.go
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@@ -95,8 +95,7 @@ func (f *Interface) readOutsidePackets(ip netip.AddrPort, via *ViaSender, out []
switch relay.Type {
case TerminalType:
// If I am the target of this relay, process the unwrapped packet
// From this recursive point, all these variables are 'burned'. We shouldn't rely on them again.
f.readOutsidePackets(netip.AddrPort{}, &ViaSender{relayHI: hostinfo, remoteIdx: relay.RemoteIndex, relay: relay}, out[:0], signedPayload, h, fwPacket, lhf, nb, q, localCache)
f.readOutsidePackets(netip.AddrPort{}, &ViaSender{relayHI: hostinfo, remoteIdx: relay.RemoteIndex, relay: relay}, out[:virtioNetHdrLen], signedPayload, h, fwPacket, lhf, nb, q, localCache)
return
case ForwardingType:
// Find the target HostInfo relay object
@@ -474,9 +473,11 @@ func (f *Interface) decryptToTun(hostinfo *HostInfo, messageCounter uint64, out
return false
}
err = newPacket(out, true, fwPacket)
packetData := out[virtioNetHdrLen:]
err = newPacket(packetData, true, fwPacket)
if err != nil {
hostinfo.logger(f.l).WithError(err).WithField("packet", out).
hostinfo.logger(f.l).WithError(err).WithField("packet", packetData).
Warnf("Error while validating inbound packet")
return false
}
@@ -491,7 +492,7 @@ func (f *Interface) decryptToTun(hostinfo *HostInfo, messageCounter uint64, out
if dropReason != nil {
// NOTE: We give `packet` as the `out` here since we already decrypted from it and we don't need it anymore
// This gives us a buffer to build the reject packet in
f.rejectOutside(out, hostinfo.ConnectionState, hostinfo, nb, packet, q)
f.rejectOutside(packetData, hostinfo.ConnectionState, hostinfo, nb, packet, q)
if f.l.Level >= logrus.DebugLevel {
hostinfo.logger(f.l).WithField("fwPacket", fwPacket).
WithField("reason", dropReason).