device: allow reducing queue constants on iOS
Heavier network extensions might require the wireguard-go component to use less ram, so let users of this reduce these as needed. At some point we'll put this behind a configuration method of sorts, but for now, just expose the consts as vars. Requested-by: Josh Bleecher Snyder <josh@tailscale.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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@ -35,7 +35,6 @@ const (
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/* Implementation constants */
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const (
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UnderLoadQueueSize = QueueHandshakeSize / 8
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UnderLoadAfterTime = time.Second // how long does the device remain under load after detected
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MaxPeers = 1 << 16 // maximum number of configured peers
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)
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@ -210,7 +210,7 @@ func (device *Device) Down() error {
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func (device *Device) IsUnderLoad() bool {
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// check if currently under load
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now := time.Now()
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underLoad := len(device.queue.handshake.c) >= UnderLoadQueueSize
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underLoad := len(device.queue.handshake.c) >= QueueHandshakeSize/8
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if underLoad {
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atomic.StoreInt64(&device.rate.underLoadUntil, now.Add(UnderLoadAfterTime).UnixNano())
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return true
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@ -7,13 +7,15 @@
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package device
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/* Fit within memory limits for iOS's Network Extension API, which has stricter requirements */
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const (
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// Fit within memory limits for iOS's Network Extension API, which has stricter requirements.
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// These are vars instead of consts, because heavier network extensions might want to reduce
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// them further.
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var (
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QueueStagedSize = 128
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QueueOutboundSize = 1024
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QueueInboundSize = 1024
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QueueHandshakeSize = 1024
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MaxSegmentSize = 1700
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PreallocatedBuffersPerPool = 1024
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PreallocatedBuffersPerPool uint32 = 1024
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)
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const MaxSegmentSize = 1700
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