2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2016 Sergey Matveev <stargrave@stargrave.org>
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.
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.
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/>.
24 "github.com/pkg/errors"
26 "cypherpunks.ru/govpn"
29 func preUpAction(path string) govpn.TunnelPreUpAction {
34 return func(ctx govpn.PeerContext) (*govpn.TAP, error) {
35 result, err := govpn.ScriptCall(path, ctx.Config.Iface, ctx.RemoteAddress)
37 return nil, errors.Wrap(err, "govpn.ScriptCall")
39 if len(ctx.Config.Iface) == 0 {
40 sepIndex := bytes.Index(result, []byte{'\n'})
42 sepIndex = len(result)
44 ctx.Config.Iface = string(result[:sepIndex])
47 if len(ctx.Config.Iface) == 0 {
48 return nil, errors.Errorf("Script %q didn't returned an interface name", path)
51 tap, err := govpn.TAPListen(ctx.Config.Iface, ctx.Config.MTU)
53 return nil, errors.Wrap(err, "govpn.TAPListen")