mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-29 21:15:39 +00:00
ea5ee6f87c
This is temporary while we work to upstream performance work in https://github.com/WireGuard/wireguard-go/pull/64. A replace directive is less ideal as it breaks dependent code without duplication of the directive. Signed-off-by: Jordan Whited <jordan@tailscale.com>
50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// 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()
|
|
}
|