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// Copyright (C) 2018 LEAP
//
// 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 bitmask
import (
"encoding/json"
"errors"
"fmt"
"log"
"os"
"time"
"github.com/pebbe/zmq4"
)
const (
// On win should be: tcp://127.0.0.1:5001
coreEndpoint = "ipc://%s/bitmask.core.sock"
timeout = time.Second * 40
)
// Bitmask holds the bitmask client data
type Bitmask struct {
coresoc *zmq4.Socket
eventsoc *zmq4.Socket
statusCh chan string
}
// Init the connection to bitmask
func Init() (*Bitmask, error) {
statusCh := make(chan string)
coresoc, err := initCore()
if err != nil {
return nil, err
}
eventsoc, err := initEvents()
if err != nil {
return nil, err
}
coresoc.SetRcvtimeo(timeout)
b := Bitmask{coresoc, eventsoc, statusCh}
go b.eventsHandler()
return &b, nil
}
// GetStatusCh returns a channel that will recieve VPN status changes
func (b *Bitmask) GetStatusCh() chan string {
return b.statusCh
}
// Close the connection to bitmask
func (b *Bitmask) Close() {
_, err := b.send("core", "stop")
if err != nil {
log.Printf("Got an error stopping bitmaskd: %v", err)
}
b.coresoc.Close()
}
func (b *Bitmask) send(parts ...interface{}) (map[string]interface{}, error) {
_, err := b.coresoc.SendMessage(parts...)
if err != nil {
return nil, err
}
resJSON, err := b.coresoc.RecvBytes(0)
if err != nil {
return nil, err
}
return parseResponse(resJSON)
}
func parseResponse(resJSON []byte) (map[string]interface{}, error) {
var response struct {
Result map[string]interface{}
Error string
}
err := json.Unmarshal(resJSON, &response)
if response.Error != "" {
return nil, errors.New(response.Error)
}
return response.Result, err
}
func initCore() (*zmq4.Socket, error) {
socket, err := zmq4.NewSocket(zmq4.REQ)
if err != nil {
return nil, err
}
endpointPwd := "/tmp"
if os.Getenv("SNAP") != "" {
endpointPwd = os.Getenv("SNAP")
}
err = socket.Connect(fmt.Sprintf(coreEndpoint, endpointPwd))
return socket, err
}
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