mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-04 23:45:34 +00:00
71029cea2d
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>
49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
// Package wgint provides somewhat shady access to wireguard-go
|
|
// internals that don't (yet) have public APIs.
|
|
package wgint
|
|
|
|
import (
|
|
"reflect"
|
|
"sync/atomic"
|
|
"unsafe"
|
|
|
|
"github.com/tailscale/wireguard-go/device"
|
|
)
|
|
|
|
var (
|
|
offHandshake = getPeerStatsOffset("lastHandshakeNano")
|
|
offRxBytes = getPeerStatsOffset("rxBytes")
|
|
offTxBytes = getPeerStatsOffset("txBytes")
|
|
)
|
|
|
|
func getPeerStatsOffset(name string) uintptr {
|
|
peerType := reflect.TypeOf(device.Peer{})
|
|
field, ok := peerType.FieldByName(name)
|
|
if !ok {
|
|
panic("no " + name + " field in device.Peer")
|
|
}
|
|
if s := field.Type.String(); s != "atomic.Int64" && s != "atomic.Uint64" {
|
|
panic("unexpected type " + s + " of field " + name + " in device.Peer")
|
|
}
|
|
return field.Offset
|
|
}
|
|
|
|
// PeerLastHandshakeNano returns the last handshake time in nanoseconds since the
|
|
// unix epoch.
|
|
func PeerLastHandshakeNano(peer *device.Peer) int64 {
|
|
return (*atomic.Int64)(unsafe.Add(unsafe.Pointer(peer), offHandshake)).Load()
|
|
}
|
|
|
|
// PeerRxBytes returns the number of bytes received from this peer.
|
|
func PeerRxBytes(peer *device.Peer) uint64 {
|
|
return (*atomic.Uint64)(unsafe.Add(unsafe.Pointer(peer), offRxBytes)).Load()
|
|
}
|
|
|
|
// PeerTxBytes returns the number of bytes sent to this peer.
|
|
func PeerTxBytes(peer *device.Peer) uint64 {
|
|
return (*atomic.Uint64)(unsafe.Add(unsafe.Pointer(peer), offTxBytes)).Load()
|
|
}
|