2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2020 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, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
31 taps = make(map[string]*TAP)
34 func NewTAP(ifaceName string, mtu int) (*TAP, error) {
35 tapRaw, err := newTAPer(ifaceName)
42 Sink: make(chan []byte),
48 buf0 := make([]byte, mtu)
49 buf1 := make([]byte, mtu)
58 n, err = tap.dev.Read(buf)
60 panic("Reading TUN/TAP:" + err.Error())
68 func (t *TAP) Write(data []byte) (n int, err error) {
69 return t.dev.Write(data)
72 func TAPListen(ifaceName string, mtu int) (*TAP, error) {
73 tap, exists := taps[ifaceName]
77 tap, err := NewTAP(ifaceName, mtu)