-
Notifications
You must be signed in to change notification settings - Fork 19
/
tcp.go
56 lines (50 loc) · 1.58 KB
/
tcp.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
// Copyright (C) 2020-2021, IrineSistiana
//
// This file is part of simple-tls.
//
// simple-tls 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.
//
// simple-tls 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 <https://www.gnu.org/licenses/>.
package core
import (
"net"
)
type TcpConfig struct {
AndroidVPN bool
}
// applyTCPSocketBuf set tcp socket io buf if c is a *net.TCPConn.
// If c is a loopback conn, a 64k buf size will be applied. Otherwise,
// the buf size is set to userConfig.
// If userConfig <=0 applyTCPSocketBuf is a noop.
func applyTCPSocketBuf(c net.Conn, userConfig int) {
tcpConn, ok := c.(*net.TCPConn)
if ok {
if isLocalConn(tcpConn) {
tcpConn.SetReadBuffer(64 * 1024)
tcpConn.SetWriteBuffer(64 * 1024)
} else if userConfig > 0 {
tcpConn.SetReadBuffer(userConfig)
tcpConn.SetWriteBuffer(userConfig)
}
}
}
func isLocalConn(c *net.TCPConn) bool {
la, ok := c.LocalAddr().(*net.TCPAddr)
if !ok {
return false
}
ra, ok := c.RemoteAddr().(*net.TCPAddr)
if !ok {
return false
}
return la.IP.IsLoopback() || ra.IP.IsLoopback()
}