2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2017 Sergey Matveev <stargrave@stargrave.org>
4 2016-2017 Bruno Clermont <bruno@robotinfra.com>
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 "github.com/pkg/errors"
27 "cypherpunks.ru/govpn"
30 func preUpAction(path string) govpn.TunnelPreUpAction {
35 return func(ctx govpn.PeerContext) (*govpn.TAP, error) {
36 result, err := govpn.ScriptCall(path, ctx.Config.Iface, ctx.RemoteAddress)
38 return nil, errors.Wrap(err, "govpn.ScriptCall")
40 if len(ctx.Config.Iface) == 0 {
41 sepIndex := bytes.Index(result, []byte{'\n'})
43 sepIndex = len(result)
45 ctx.Config.Iface = string(result[:sepIndex])
48 if len(ctx.Config.Iface) == 0 {
49 return nil, errors.Errorf("Script %q didn't return interface name", path)
52 tap, err := govpn.TAPListen(ctx.Config.Iface, ctx.Config.MTU)
54 return nil, errors.Wrap(err, "govpn.TAPListen")