9e2f386022
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>
37 lines
1009 B
Go
37 lines
1009 B
Go
/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
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*/
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package conn
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import (
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"net"
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"syscall"
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)
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// controlFn is the callback function signature from net.ListenConfig.Control.
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// It is used to apply platform specific configuration to the socket prior to
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// bind.
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type controlFn func(network, address string, c syscall.RawConn) error
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// controlFns is a list of functions that are called from the listen config
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// that can apply socket options.
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var controlFns = []controlFn{}
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// listenConfig returns a net.ListenConfig that applies the controlFns to the
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// socket prior to bind. This is used to apply socket buffer sizing and packet
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// information OOB configuration for sticky sockets.
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func listenConfig() *net.ListenConfig {
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return &net.ListenConfig{
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Control: func(network, address string, c syscall.RawConn) error {
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for _, fn := range controlFns {
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if err := fn(network, address, c); err != nil {
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return err
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}
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}
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return nil
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},
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}
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}
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