src/cypherpunks.ru/govpn/cmd/govpn-server/common.go

   1 /*
   2 GoVPN -- simple secure free software virtual private network daemon
   3 Copyright (C) 2014-2017 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 package main
  20
  21 import (
  22         "bytes"
  23         "sync"
  24
  25         "cypherpunks.ru/govpn"
  26 )
  27
  28 type PeerState struct {
  29         peer       *govpn.Peer
  30         terminator chan struct{}
  31         tap        *govpn.TAP
  32 }
  33
  34 var (
  35         handshakes map[string]*govpn.Handshake = make(map[string]*govpn.Handshake)
  36         hsLock     sync.RWMutex
  37
  38         peers     = make(map[string]*PeerState)
  39         peersLock sync.RWMutex
  40
  41         peersByID     = make(map[govpn.PeerID]string)
  42         peersByIDLock sync.RWMutex
  43
  44         knownPeers govpn.KnownPeers
  45         kpLock     sync.RWMutex
  46 )
  47
  48 func callUp(peerID *govpn.PeerID, remoteAddr string) (string, error) {
  49         ifaceName := confs[*peerID].Iface
  50         if confs[*peerID].Up != "" {
  51                 result, err := govpn.ScriptCall(confs[*peerID].Up, ifaceName, remoteAddr)
  52                 if err != nil {
  53                         govpn.Printf(
  54                                 `[script-failed bind="%s" path="%s" err="%s"]`,
  55                                 *bindAddr,
  56                                 confs[*peerID].Up,
  57                                 err,
  58                         )
  59                         return "", err
  60                 }
  61                 if ifaceName == "" {
  62                         sepIndex := bytes.Index(result, []byte{'\n'})
  63                         if sepIndex < 0 {
  64                                 sepIndex = len(result)
  65                         }
  66                         ifaceName = string(result[:sepIndex])
  67                 }
  68         }
  69         if ifaceName == "" {
  70                 govpn.Printf(`[tap-failed bind="%s" peer="%s"]`, *bindAddr, *peerID)
  71         }
  72         return ifaceName, nil
  73 }