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server.go
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server.go
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package sing_shadowsocks
import (
"context"
"fmt"
"net"
"strings"
"github.com/metacubex/mihomo/adapter/inbound"
N "github.com/metacubex/mihomo/common/net"
"github.com/metacubex/mihomo/common/sockopt"
C "github.com/metacubex/mihomo/constant"
LC "github.com/metacubex/mihomo/listener/config"
embedSS "github.com/metacubex/mihomo/listener/shadowsocks"
"github.com/metacubex/mihomo/listener/sing"
"github.com/metacubex/mihomo/log"
"github.com/metacubex/mihomo/ntp"
shadowsocks "github.com/metacubex/sing-shadowsocks"
"github.com/metacubex/sing-shadowsocks/shadowaead"
"github.com/metacubex/sing-shadowsocks/shadowaead_2022"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/buf"
"github.com/sagernet/sing/common/bufio"
M "github.com/sagernet/sing/common/metadata"
"github.com/sagernet/sing/common/network"
)
type Listener struct {
closed bool
config LC.ShadowsocksServer
listeners []net.Listener
udpListeners []net.PacketConn
service shadowsocks.Service
}
var _listener *Listener
func New(config LC.ShadowsocksServer, tunnel C.Tunnel, additions ...inbound.Addition) (C.MultiAddrListener, error) {
var sl *Listener
var err error
if len(additions) == 0 {
additions = []inbound.Addition{
inbound.WithInName("DEFAULT-SHADOWSOCKS"),
inbound.WithSpecialRules(""),
}
defer func() {
_listener = sl
}()
}
udpTimeout := int64(sing.UDPTimeout.Seconds())
h, err := sing.NewListenerHandler(sing.ListenerConfig{
Tunnel: tunnel,
Type: C.SHADOWSOCKS,
Additions: additions,
MuxOption: config.MuxOption,
})
if err != nil {
return nil, err
}
sl = &Listener{false, config, nil, nil, nil}
switch {
case config.Cipher == shadowsocks.MethodNone:
sl.service = shadowsocks.NewNoneService(udpTimeout, h)
case common.Contains(shadowaead.List, config.Cipher):
sl.service, err = shadowaead.NewService(config.Cipher, nil, config.Password, udpTimeout, h)
case common.Contains(shadowaead_2022.List, config.Cipher):
sl.service, err = shadowaead_2022.NewServiceWithPassword(config.Cipher, config.Password, udpTimeout, h, ntp.Now)
default:
err = fmt.Errorf("shadowsocks: unsupported method: %s", config.Cipher)
return embedSS.New(config, tunnel)
}
if err != nil {
return nil, err
}
for _, addr := range strings.Split(config.Listen, ",") {
addr := addr
if config.Udp {
//UDP
ul, err := net.ListenPacket("udp", addr)
if err != nil {
return nil, err
}
err = sockopt.UDPReuseaddr(ul.(*net.UDPConn))
if err != nil {
log.Warnln("Failed to Reuse UDP Address: %s", err)
}
sl.udpListeners = append(sl.udpListeners, ul)
go func() {
conn := bufio.NewPacketConn(ul)
rwOptions := network.ReadWaitOptions{
FrontHeadroom: network.CalculateFrontHeadroom(sl.service),
RearHeadroom: network.CalculateRearHeadroom(sl.service),
MTU: network.CalculateMTU(conn, sl.service),
}
readWaiter, isReadWaiter := bufio.CreatePacketReadWaiter(conn)
if isReadWaiter {
readWaiter.InitializeReadWaiter(rwOptions)
}
for {
var (
buff *buf.Buffer
dest M.Socksaddr
err error
)
buff = nil // clear last loop status, avoid repeat release
if isReadWaiter {
buff, dest, err = readWaiter.WaitReadPacket()
} else {
buff = rwOptions.NewPacketBuffer()
dest, err = conn.ReadPacket(buff)
if buff != nil {
rwOptions.PostReturn(buff)
}
}
if err != nil {
buff.Release()
if sl.closed {
break
}
continue
}
_ = sl.service.NewPacket(context.TODO(), conn, buff, M.Metadata{
Protocol: "shadowsocks",
Source: dest,
})
}
}()
}
//TCP
l, err := inbound.Listen("tcp", addr)
if err != nil {
return nil, err
}
sl.listeners = append(sl.listeners, l)
go func() {
for {
c, err := l.Accept()
if err != nil {
if sl.closed {
break
}
continue
}
N.TCPKeepAlive(c)
go sl.HandleConn(c, tunnel)
}
}()
}
return sl, nil
}
func (l *Listener) Close() error {
l.closed = true
var retErr error
for _, lis := range l.listeners {
err := lis.Close()
if err != nil {
retErr = err
}
}
for _, lis := range l.udpListeners {
err := lis.Close()
if err != nil {
retErr = err
}
}
return retErr
}
func (l *Listener) Config() string {
return l.config.String()
}
func (l *Listener) AddrList() (addrList []net.Addr) {
for _, lis := range l.listeners {
addrList = append(addrList, lis.Addr())
}
for _, lis := range l.udpListeners {
addrList = append(addrList, lis.LocalAddr())
}
return
}
func (l *Listener) HandleConn(conn net.Conn, tunnel C.Tunnel, additions ...inbound.Addition) {
ctx := sing.WithAdditions(context.TODO(), additions...)
err := l.service.NewConnection(ctx, conn, M.Metadata{
Protocol: "shadowsocks",
Source: M.ParseSocksaddr(conn.RemoteAddr().String()),
})
if err != nil {
_ = conn.Close()
return
}
}
func HandleShadowSocks(conn net.Conn, tunnel C.Tunnel, additions ...inbound.Addition) bool {
if _listener != nil && _listener.service != nil {
go _listener.HandleConn(conn, tunnel, additions...)
return true
}
return embedSS.HandleShadowSocks(conn, tunnel, additions...)
}