/
conf.go
112 lines (99 loc) · 2.55 KB
/
conf.go
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/*
GoVPN -- simple secure free software virtual private network daemon
Copyright (C) 2014-2022 Sergey Matveev <stargrave@stargrave.org>
Copyright (C) 2022 github.com/bytejedi
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"errors"
"io/ioutil"
"log"
"time"
"gopkg.in/yaml.v2"
"github.com/bytejedi/govpn"
)
const (
RefreshRate = time.Minute
)
var (
confs map[govpn.PeerID]*govpn.PeerConf
idsCache *govpn.MACCache
)
func confRead() (*map[govpn.PeerID]*govpn.PeerConf, error) {
data, err := ioutil.ReadFile(*confPath)
if err != nil {
return nil, err
}
confsRaw := new(map[string]govpn.PeerConf)
err = yaml.Unmarshal(data, confsRaw)
if err != nil {
return nil, err
}
confs := make(map[govpn.PeerID]*govpn.PeerConf, len(*confsRaw))
for name, pc := range *confsRaw {
verifier, err := govpn.VerifierFromString(pc.VerifierRaw)
if err != nil {
return nil, errors.New("Unable to decode verifier: " + err.Error())
}
if pc.Encless {
pc.Noise = true
}
if pc.MTU == 0 {
pc.MTU = govpn.MTUDefault
}
if pc.MTU > govpn.MTUMax {
govpn.Printf(`[mtu-high bind="%s" value="%d" overriden="%d"]`, *bindAddr, pc.MTU, govpn.MTUMax)
pc.MTU = govpn.MTUMax
}
conf := govpn.PeerConf{
Verifier: verifier,
ID: verifier.ID,
Name: name,
Iface: pc.Iface,
MTU: pc.MTU,
Up: pc.Up,
Down: pc.Down,
Noise: pc.Noise,
CPR: pc.CPR,
Encless: pc.Encless,
TimeSync: pc.TimeSync,
}
if pc.TimeoutInt <= 0 {
pc.TimeoutInt = govpn.TimeoutDefault
}
conf.Timeout = time.Second * time.Duration(pc.TimeoutInt)
confs[*verifier.ID] = &conf
}
return &confs, nil
}
func confRefresh() error {
newConfs, err := confRead()
if err != nil {
govpn.Printf(`[conf-parse-failed bind="%s" err="%s"]`, *bindAddr, err)
return err
}
confs = *newConfs
idsCache.Update(newConfs)
return nil
}
func confInit() {
idsCache = govpn.NewMACCache()
if err := confRefresh(); err != nil {
log.Fatalln(err)
}
go func() {
for {
time.Sleep(RefreshRate)
confRefresh()
}
}()
}