mirror of
https://github.com/net-byte/vtun
synced 2024-03-14 10:50:03 +08:00
75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package ws
|
|
|
|
import (
|
|
"io"
|
|
"log"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/gobwas/ws/wsutil"
|
|
"github.com/net-byte/vtun/common/cache"
|
|
"github.com/net-byte/vtun/common/cipher"
|
|
"github.com/net-byte/vtun/common/config"
|
|
"github.com/net-byte/vtun/common/netutil"
|
|
"github.com/net-byte/vtun/tun"
|
|
"github.com/songgao/water"
|
|
"github.com/songgao/water/waterutil"
|
|
)
|
|
|
|
// Start websocket client
|
|
func StartClient(config config.Config) {
|
|
log.Printf("vtun ws client started on %v", config.LocalAddr)
|
|
iface := tun.CreateTun(config)
|
|
// read data from tun
|
|
packet := make([]byte, config.MTU)
|
|
for {
|
|
n, err := iface.Read(packet)
|
|
if err != nil || n == 0 {
|
|
continue
|
|
}
|
|
b := packet[:n]
|
|
if !waterutil.IsIPv4(b) {
|
|
continue
|
|
}
|
|
srcIPv4, dstIPv4 := netutil.GetIPv4(b)
|
|
if srcIPv4 == "" || dstIPv4 == "" {
|
|
continue
|
|
}
|
|
key := dstIPv4
|
|
var conn net.Conn
|
|
if v, ok := cache.GetCache().Get(key); ok {
|
|
conn = v.(net.Conn)
|
|
} else {
|
|
conn = netutil.ConnectServer(config)
|
|
if conn == nil {
|
|
continue
|
|
}
|
|
cache.GetCache().Set(key, conn, 10*time.Minute)
|
|
go wsToTun(config, key, conn, iface)
|
|
}
|
|
if config.Obfs {
|
|
b = cipher.XOR(b)
|
|
}
|
|
wsutil.WriteClientBinary(conn, b)
|
|
}
|
|
}
|
|
|
|
func wsToTun(config config.Config, key string, wsconn net.Conn, iface *water.Interface) {
|
|
defer wsconn.Close()
|
|
for {
|
|
wsconn.SetReadDeadline(time.Now().Add(time.Duration(config.Timeout) * time.Second))
|
|
b, err := wsutil.ReadServerBinary(wsconn)
|
|
if err != nil || err == io.EOF {
|
|
break
|
|
}
|
|
if config.Obfs {
|
|
b = cipher.XOR(b)
|
|
}
|
|
if !waterutil.IsIPv4(b) {
|
|
continue
|
|
}
|
|
iface.Write(b)
|
|
}
|
|
cache.GetCache().Delete(key)
|
|
}
|