mirror of
https://github.com/tim-beatham/smegmesh.git
synced 2024-12-15 02:50:44 +01:00
661fb0d54c
Keepalive is based on per mesh and not per node. Using total ordering mechanism similar to paxos to elect a leader if leader doesn't update it's timestamp within 3 * keepAlive then give the leader a gravestone and elect the next leader. Leader is bassed on lexicographically ordered public key.
94 lines
2.0 KiB
Go
94 lines
2.0 KiB
Go
package wg
|
|
|
|
import (
|
|
"crypto"
|
|
"crypto/rand"
|
|
"fmt"
|
|
|
|
"github.com/tim-beatham/wgmesh/pkg/lib"
|
|
logging "github.com/tim-beatham/wgmesh/pkg/log"
|
|
"golang.zx2c4.com/wireguard/wgctrl"
|
|
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
|
|
)
|
|
|
|
type WgInterfaceManipulatorImpl struct {
|
|
client *wgctrl.Client
|
|
}
|
|
|
|
const hashLength = 6
|
|
|
|
// CreateInterface creates a WireGuard interface
|
|
func (m *WgInterfaceManipulatorImpl) CreateInterface(port int, privKey *wgtypes.Key) (string, error) {
|
|
rtnl, err := lib.NewRtNetlinkConfig()
|
|
|
|
if err != nil {
|
|
return "", fmt.Errorf("failed to access link: %w", err)
|
|
}
|
|
defer rtnl.Close()
|
|
|
|
randomBuf := make([]byte, 32)
|
|
_, err = rand.Read(randomBuf)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
md5 := crypto.MD5.New().Sum(randomBuf)
|
|
md5Str := fmt.Sprintf("wg%x", md5)[:hashLength]
|
|
|
|
err = rtnl.CreateLink(md5Str)
|
|
|
|
if err != nil {
|
|
return "", fmt.Errorf("failed to create link: %w", err)
|
|
}
|
|
|
|
var cfg wgtypes.Config = wgtypes.Config{
|
|
PrivateKey: privKey,
|
|
ListenPort: &port,
|
|
}
|
|
|
|
err = m.client.ConfigureDevice(md5Str, cfg)
|
|
|
|
if err != nil {
|
|
m.RemoveInterface(md5Str)
|
|
return "", fmt.Errorf("failed to configure dev: %w", err)
|
|
}
|
|
|
|
logging.Log.WriteInfof("ip link set up dev %s type wireguard", md5Str)
|
|
return md5Str, nil
|
|
}
|
|
|
|
// Add an address to the given interface
|
|
func (m *WgInterfaceManipulatorImpl) AddAddress(ifName string, addr string) error {
|
|
rtnl, err := lib.NewRtNetlinkConfig()
|
|
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create config: %w", err)
|
|
}
|
|
defer rtnl.Close()
|
|
|
|
err = rtnl.AddAddress(ifName, addr)
|
|
|
|
if err != nil {
|
|
err = fmt.Errorf("failed to add address: %w", err)
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// RemoveInterface implements WgInterfaceManipulator.
|
|
func (*WgInterfaceManipulatorImpl) RemoveInterface(ifName string) error {
|
|
rtnl, err := lib.NewRtNetlinkConfig()
|
|
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create config: %w", err)
|
|
}
|
|
defer rtnl.Close()
|
|
|
|
return rtnl.DeleteLink(ifName)
|
|
}
|
|
|
|
func NewWgInterfaceManipulator(client *wgctrl.Client) WgInterfaceManipulator {
|
|
return &WgInterfaceManipulatorImpl{client: client}
|
|
}
|