/
openvpn.go
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/
openvpn.go
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/*
* Copyright (C) 2018 The "MysteriumNetwork/node" Authors.
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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 connection
import (
"encoding/json"
"github.com/mysterium/node/identity"
"github.com/mysterium/node/location"
"github.com/mysterium/node/openvpn"
"github.com/mysterium/node/openvpn/middlewares/client/auth"
"github.com/mysterium/node/openvpn/middlewares/client/bytescount"
"github.com/mysterium/node/openvpn/middlewares/state"
openvpnSession "github.com/mysterium/node/openvpn/session"
"github.com/mysterium/node/server"
"github.com/mysterium/node/session"
"path/filepath"
"time"
)
// ConfigureVpnClientFactory creates openvpn construction function by given vpn session, consumer id and state callbacks
func ConfigureVpnClientFactory(
mysteriumAPIClient server.Client,
openvpnBinary, configDirectory, runtimeDirectory string,
signerFactory identity.SignerFactory,
statsKeeper bytescount.SessionStatsKeeper,
originalLocationCache location.Cache,
) VpnClientCreator {
return func(vpnSession session.SessionDto, consumerID identity.Identity, providerID identity.Identity, stateCallback state.Callback) (openvpn.Client, error) {
var receivedConfig openvpn.VPNConfig
err := json.Unmarshal(vpnSession.Config, &receivedConfig)
if err != nil {
return nil, err
}
vpnClientConfig, err := openvpn.NewClientConfigFromSession(&receivedConfig, configDirectory, filepath.Join(runtimeDirectory, "client.ovpn"))
if err != nil {
return nil, err
}
signer := signerFactory(consumerID)
statsSaver := bytescount.NewSessionStatsSaver(statsKeeper)
originalLocation := originalLocationCache.Get()
statsSender := bytescount.NewSessionStatsSender(
mysteriumAPIClient,
vpnSession.ID,
providerID,
signer,
originalLocation.Country,
)
asyncStatsSender := func(stats bytescount.SessionStats) error {
go statsSender(stats)
return nil
}
intervalStatsSender, err := bytescount.NewIntervalStatsHandler(asyncStatsSender, time.Now, time.Minute)
if err != nil {
return nil, err
}
statsHandler := bytescount.NewCompositeStatsHandler(statsSaver, intervalStatsSender)
credentialsProvider := openvpnSession.SignatureCredentialsProvider(vpnSession.ID, signer)
return openvpn.NewClient(
openvpnBinary,
vpnClientConfig,
runtimeDirectory,
state.NewMiddleware(stateCallback),
bytescount.NewMiddleware(statsHandler, 1*time.Second),
auth.NewMiddleware(credentialsProvider),
), nil
}
}
func channelToStateCallbackAdapter(channel chan openvpn.State) state.Callback {
return func(state openvpn.State) {
channel <- state
if state == openvpn.ExitingState {
//this is the last state - close channel (according to best practices of go - channel writer controls channel)
close(channel)
}
}
}