/
net_android_linux.go
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/
net_android_linux.go
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//go:build android || linux
// +build android linux
/*
* Copyright (c) 2020, Psiphon Inc.
* All rights reserved.
*
* 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 psiphon
import (
"net"
"strconv"
"unsafe"
"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/errors"
"golang.org/x/net/bpf"
"golang.org/x/sys/unix"
)
func ClientBPFEnabled() bool {
return true
}
func setSocketBPF(BPFProgramInstructions []bpf.RawInstruction, socketFD int) error {
// Tactics parameters validation ensures BPFProgramInstructions has len >= 1.
err := unix.SetsockoptSockFprog(
socketFD,
unix.SOL_SOCKET,
unix.SO_ATTACH_FILTER,
&unix.SockFprog{
Len: uint16(len(BPFProgramInstructions)),
Filter: (*unix.SockFilter)(unsafe.Pointer(&BPFProgramInstructions[0])),
})
return errors.Trace(err)
}
func setAdditionalSocketOptions(_ int) {
}
func makeLocalProxyListener(listenIP string, port int) (net.Listener, bool, error) {
listener, err := net.Listen("tcp", net.JoinHostPort(listenIP, strconv.Itoa(port)))
if err != nil {
return nil, IsAddressInUseError(err), errors.Trace(err)
}
return listener, false, nil
}