tailscale/wgengine/magicsock/magicsock_default.go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause

//go:build !linux

package magicsock

import (
	"errors"
	"io"

	"tailscale.com/types/logger"
	"tailscale.com/types/nettype"
)

func (c *Conn) listenRawDisco(family string) (io.Closer, error) {
	return nil, errors.New("raw disco listening not supported on this OS")
}

func trySetSocketBuffer(pconn nettype.PacketConn, logf logger.Logf) {
	portableTrySetSocketBuffer(pconn, logf)
}

const (
	controlMessageSize = 0
)
all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com> 2 years ago			`// Copyright (c) Tailscale Inc & AUTHORS`
			`// SPDX-License-Identifier: BSD-3-Clause`
wgengine/magicsock: use AF_PACKET socket + BPF to read disco messages This is entirely optional (i.e. failing in this code is non-fatal) and only enabled on Linux for now. Additionally, this new behaviour can be disabled by setting the TS_DEBUG_DISABLE_AF_PACKET environment variable. Updates #3824 Replaces #5474 Co-authored-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: David Anderson <danderson@tailscale.com> 2 years ago
			`//go:build !linux`

			`package magicsock`

			`import (`
			`"errors"`
			`"io"`
wgengine/magicsock: set UDP socket buffer sizes to 7MB - At high data rates more buffer space is required in order to avoid packet loss during any cause of delay. - On slower machines more buffer space is required in order to avoid packet loss while decryption & tun writing is underway. - On higher latency network paths more buffer space is required in order to overcome BDP. - On Linux set with SO_*BUFFORCE to bypass net.core.{r,w}mem_max. - 7MB is the current default maximum on macOS 12.6 - Windows test is omitted, as Windows does not support getsockopt for these options. Signed-off-by: James Tucker <james@tailscale.com> 2 years ago
			`"tailscale.com/types/logger"`
			`"tailscale.com/types/nettype"`
wgengine/magicsock: use AF_PACKET socket + BPF to read disco messages This is entirely optional (i.e. failing in this code is non-fatal) and only enabled on Linux for now. Additionally, this new behaviour can be disabled by setting the TS_DEBUG_DISABLE_AF_PACKET environment variable. Updates #3824 Replaces #5474 Co-authored-by: Andrew Dunham <andrew@du.nham.ca> Signed-off-by: David Anderson <danderson@tailscale.com> 2 years ago			`)`

			`func (c *Conn) listenRawDisco(family string) (io.Closer, error) {`
			`return nil, errors.New("raw disco listening not supported on this OS")`
			`}`
wgengine/magicsock: set UDP socket buffer sizes to 7MB - At high data rates more buffer space is required in order to avoid packet loss during any cause of delay. - On slower machines more buffer space is required in order to avoid packet loss while decryption & tun writing is underway. - On higher latency network paths more buffer space is required in order to overcome BDP. - On Linux set with SO_*BUFFORCE to bypass net.core.{r,w}mem_max. - 7MB is the current default maximum on macOS 12.6 - Windows test is omitted, as Windows does not support getsockopt for these options. Signed-off-by: James Tucker <james@tailscale.com> 2 years ago
			`func trySetSocketBuffer(pconn nettype.PacketConn, logf logger.Logf) {`
			`portableTrySetSocketBuffer(pconn, logf)`
			`}`
net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791) This commit implements UDP offloading for Linux. GSO size is passed to and from the kernel via socket control messages. Support is probed at runtime. UDP GSO is dependent on checksum offload support on the egress netdev. UDP GSO will be disabled in the event sendmmsg() returns EIO, which is a strong signal that the egress netdev does not support checksum offload. Updates tailscale/corp#8734 Signed-off-by: Jordan Whited <jordan@tailscale.com> 2 years ago
			`const (`
			`controlMessageSize = 0`
			`)`