func Dial(src v2net.Address, dest v2net.Destination, options internet.DialerOptions) (internet.Connection, error) {
log.Info("Internet|TCP: Dailing TCP to ", dest)
if src == nil {
src = v2net.AnyIP
}
networkSettings, err := options.Stream.GetEffectiveNetworkSettings()
if err != nil {
return nil, err
}
tcpSettings := networkSettings.(*Config)
id := internal.NewConnectionId(src, dest)
var conn net.Conn
if dest.Network == v2net.Network_TCP && tcpSettings.ConnectionReuse.IsEnabled() {
conn = globalCache.Get(id)
}
if conn == nil {
var err error
conn, err = internet.DialToDest(src, dest)
if err != nil {
return nil, err
}
if options.Stream != nil && options.Stream.HasSecuritySettings() {
securitySettings, err := options.Stream.GetEffectiveSecuritySettings()
if err != nil {
log.Error("TCP: Failed to get security settings: ", err)
return nil, err
}
tlsConfig, ok := securitySettings.(*v2tls.Config)
if ok {
config := tlsConfig.GetTLSConfig()
if dest.Address.Family().IsDomain() {
config.ServerName = dest.Address.Domain()
}
conn = tls.Client(conn, config)
}
}
if tcpSettings.HeaderSettings != nil {
headerConfig, err := tcpSettings.HeaderSettings.GetInstance()
if err != nil {
return nil, errors.Base(err).Message("Interent|TCP: Failed to get header settings.")
}
auth, err := internet.CreateConnectionAuthenticator(tcpSettings.HeaderSettings.Type, headerConfig)
if err != nil {
return nil, errors.Base(err).Message("Internet|TCP: Failed to create header authenticator.")
}
conn = auth.Client(conn)
}
}
return NewConnection(id, conn, globalCache, tcpSettings), nil
}
func DialKCP(src v2net.Address, dest v2net.Destination, options internet.DialerOptions) (internet.Connection, error) {
dest.Network = v2net.Network_UDP
log.Info("KCP|Dialer: Dialing KCP to ", dest)
id := internal.NewConnectionId(src, dest)
conn := globalPool.Get(id)
if conn == nil {
rawConn, err := internet.DialToDest(src, dest)
if err != nil {
log.Error("KCP|Dialer: Failed to dial to dest: ", err)
return nil, err
}
c := &ClientConnection{
Conn: rawConn,
id: id,
}
go c.Run()
conn = c
}
networkSettings, err := options.Stream.GetEffectiveNetworkSettings()
if err != nil {
log.Error("KCP|Dialer: Failed to get KCP settings: ", err)
return nil, err
}
kcpSettings := networkSettings.(*Config)
clientConn := conn.(*ClientConnection)
header, err := kcpSettings.GetPackerHeader()
if err != nil {
return nil, errors.Base(err).Message("KCP|Dialer: Failed to create packet header.")
}
security, err := kcpSettings.GetSecurity()
if err != nil {
return nil, errors.Base(err).Message("KCP|Dialer: Failed to create security.")
}
clientConn.ResetSecurity(header, security)
conv := uint16(atomic.AddUint32(&globalConv, 1))
session := NewConnection(conv, clientConn, globalPool, kcpSettings)
var iConn internet.Connection
iConn = session
if options.Stream != nil && options.Stream.HasSecuritySettings() {
securitySettings, err := options.Stream.GetEffectiveSecuritySettings()
if err != nil {
log.Error("KCP|Dialer: Failed to get security settings: ", err)
return nil, err
}
switch securitySettings := securitySettings.(type) {
case *v2tls.Config:
config := securitySettings.GetTLSConfig()
if dest.Address.Family().IsDomain() {
config.ServerName = dest.Address.Domain()
}
tlsConn := tls.Client(conn, config)
iConn = v2tls.NewConnection(tlsConn)
}
}
return iConn, nil
}
func (v *Listener) OnReceive(payload *buf.Buffer, session *proxy.SessionInfo) {
defer payload.Release()
src := session.Source
segments := v.reader.Read(payload.Bytes())
if len(segments) == 0 {
log.Info("KCP|Listener: discarding invalid payload from ", src)
return
}
if !v.running {
return
}
v.Lock()
defer v.Unlock()
if !v.running {
return
}
if payload.Len() < 4 {
return
}
conv := segments[0].Conversation()
cmd := segments[0].Command()
id := ConnectionId{
Remote: src.Address,
Port: src.Port,
Conv: conv,
}
conn, found := v.sessions[id]
if !found {
if cmd == CommandTerminate {
return
}
writer := &Writer{
id: id,
hub: v.hub,
dest: src,
listener: v,
}
remoteAddr := &net.UDPAddr{
IP: src.Address.IP(),
Port: int(src.Port),
}
localAddr := v.hub.Addr()
sConn := &ServerConnection{
id: internal.NewConnectionId(v2net.LocalHostIP, src),
local: localAddr,
remote: remoteAddr,
writer: &KCPPacketWriter{
Header: v.header,
Writer: writer,
Security: v.security,
},
closer: writer,
}
conn = NewConnection(conv, sConn, v, v.config)
select {
case v.awaitingConns <- conn:
case <-time.After(time.Second * 5):
conn.Close()
return
}
v.sessions[id] = conn
}
conn.Input(segments)
}