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conn, device, tun: implement vectorized I/O on Linux

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Implement TCP offloading via TSO and GRO for the Linux tun.Device, which
is made possible by virtio extensions in the kernel's TUN driver.

Delete conn.LinuxSocketEndpoint in favor of a collapsed conn.StdNetBind.
conn.StdNetBind makes use of recvmmsg() and sendmmsg() on Linux. All
platforms now fall under conn.StdNetBind, except for Windows, which
remains in conn.WinRingBind, which still needs to be adjusted to handle
multiple packets.

Also refactor sticky sockets support to eventually be applicable on
platforms other than just Linux. However Linux remains the sole platform
that fully implements it for now.

Co-authored-by: James Tucker <james@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jordan Whited
2023-03-02 15:08:28 -08:00
committed by Jason A. Donenfeld
parent 3bb8fec7e4
commit 9e2f386022
24 changed files with 1877 additions and 794 deletions
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4
device/queueconstants_default.go
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@@ -7,8 +7,10 @@
package device
import "golang.zx2c4.com/wireguard/conn"
const (
QueueStagedSize = 128
QueueStagedSize = conn.DefaultBatchSize
QueueOutboundSize = 1024
QueueInboundSize = 1024
QueueHandshakeSize = 1024