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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 (
"bytes"
"encoding/json"
"errors"
"io/ioutil"
"log"
"net/http"
"path"
"time"
)
const (
timeout = time.Second * 15
url = "http://localhost:7070/API/"
headerAuth = "X-Bitmask-Auth"
)
// Bitmask holds the bitmask client data
type Bitmask struct {
client *http.Client
apiToken string
statusCh chan string
}
// Init the connection to bitmask
func Init() (*Bitmask, error) {
statusCh := make(chan string)
client := &http.Client{
Timeout: timeout,
}
apiToken, err := getToken()
if err != nil {
return nil, err
}
b := Bitmask{client, apiToken, 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)
}
}
func (b *Bitmask) send(parts ...interface{}) (map[string]interface{}, error) {
resJSON, err := send(b.apiToken, b.client, parts...)
if err != nil {
return nil, err
}
result, ok := resJSON.(map[string]interface{})
if !ok {
return nil, errors.New("Not valid response")
}
return result, nil
}
func send(apiToken string, client *http.Client, parts ...interface{}) (interface{}, error) {
apiSection, _ := parts[0].(string)
reqBody, err := json.Marshal(parts[1:])
if err != nil {
return nil, err
}
req, err := http.NewRequest("POST", url+apiSection, bytes.NewReader(reqBody))
if err != nil {
return nil, err
}
req.Header.Add(headerAuth, apiToken)
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
resJSON, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return parseResponse(resJSON)
}
func parseResponse(resJSON []byte) (interface{}, error) {
var response struct {
Result interface{}
Error string
}
err := json.Unmarshal(resJSON, &response)
if response.Error != "" {
return nil, errors.New(response.Error)
}
return response.Result, err
}
func getToken() (string, error) {
path := path.Join(ConfigPath, "authtoken")
b, err := ioutil.ReadFile(path)
return string(b), err
}
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