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This commit is contained in:
JackDoan
2025-11-07 16:50:43 -06:00
parent 6e22bfeeb1
commit e3be0943fd
13 changed files with 1469 additions and 8 deletions
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23
overlay/tun_linux.go
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@@ -16,11 +16,11 @@ import (
"unsafe"
"github.com/gaissmai/bart"
"github.com/hetznercloud/virtio-go/tuntap"
"github.com/hetznercloud/virtio-go/vhostnet"
"github.com/hetznercloud/virtio-go/virtio"
"github.com/sirupsen/logrus"
"github.com/slackhq/nebula/config"
"github.com/slackhq/nebula/overlay/tuntap"
"github.com/slackhq/nebula/overlay/vhostnet"
"github.com/slackhq/nebula/routing"
"github.com/slackhq/nebula/util"
"github.com/vishvananda/netlink"
@@ -121,9 +121,9 @@ func newTun(c *config.C, l *logrus.Logger, vpnNetworks []netip.Prefix, multiqueu
name := strings.Trim(c.GetString("tun.dev", ""), "\x00")
tundev, err := tuntap.NewDevice(
tuntap.WithName(name),
tuntap.WithDeviceType(tuntap.DeviceTypeTUN),
tuntap.WithVirtioNetHdr(true),
tuntap.WithOffloads(0x0), //todo
tuntap.WithDeviceType(tuntap.DeviceTypeTUN), //todo wtf
tuntap.WithVirtioNetHdr(true), //todo hmm
tuntap.WithOffloads(unix.TUN_F_CSUM|unix.TUN_F_USO4|unix.TUN_F_USO6), //todo
)
if err != nil {
return nil, err
@@ -137,7 +137,7 @@ func newTun(c *config.C, l *logrus.Logger, vpnNetworks []netip.Prefix, multiqueu
t.Device = name
vdev, err := vhostnet.NewDevice(
vhostnet.WithBackendDevice(tundev),
vhostnet.WithBackendFD(int(tundev.File().Fd())),
vhostnet.WithQueueSize(8), //todo config
)
if err != nil {
@@ -264,9 +264,12 @@ func (t *tun) RoutesFor(ip netip.Addr) routing.Gateways {
}
func (t *tun) Read(p []byte) (int, error) {
_, out, err := t.vdev.ReceivePacket()
hdr, out, err := t.vdev.ReceivePacket()
if err != nil {
return 0, err
}
if hdr.NumBuffers == 0 {
}
p = p[:len(out)]
copy(p, out)
@@ -278,14 +281,18 @@ func (t *tun) Write(b []byte) (int, error) {
hdr := virtio.NetHdr{ //todo
Flags: 0,
GSOType: 0,
GSOType: unix.VIRTIO_NET_HDR_GSO_NONE,
HdrLen: 0,
GSOSize: 0,
CsumStart: 0,
CsumOffset: 0,
NumBuffers: 0,
}
//todo wow fuck this
//bb := make([]byte, maximum+14)
//copy(bb[14:], b)
err := t.vdev.TransmitPacket(hdr, b)
//err := t.vdev.TransmitPacket2(b)
if err != nil {
return 0, err
}