Xray-core/transport/internet/tcp_hub.go

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2020-11-25 11:01:53 +00:00
package internet
import (
"context"
"github.com/xtls/xray-core/v1/common/net"
)
var (
transportListenerCache = make(map[string]ListenFunc)
)
func RegisterTransportListener(protocol string, listener ListenFunc) error {
if _, found := transportListenerCache[protocol]; found {
return newError(protocol, " listener already registered.").AtError()
}
transportListenerCache[protocol] = listener
return nil
}
type ConnHandler func(Connection)
type ListenFunc func(ctx context.Context, address net.Address, port net.Port, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error)
type Listener interface {
Close() error
Addr() net.Addr
}
// ListenUnix is the UDS version of ListenTCP
func ListenUnix(ctx context.Context, address net.Address, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error) {
if settings == nil {
s, err := ToMemoryStreamConfig(nil)
if err != nil {
return nil, newError("failed to create default unix stream settings").Base(err)
}
settings = s
}
protocol := settings.ProtocolName
listenFunc := transportListenerCache[protocol]
if listenFunc == nil {
return nil, newError(protocol, " unix istener not registered.").AtError()
}
listener, err := listenFunc(ctx, address, net.Port(0), settings, handler)
if err != nil {
return nil, newError("failed to listen on unix address: ", address).Base(err)
}
return listener, nil
}
func ListenTCP(ctx context.Context, address net.Address, port net.Port, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error) {
if settings == nil {
s, err := ToMemoryStreamConfig(nil)
if err != nil {
return nil, newError("failed to create default stream settings").Base(err)
}
settings = s
}
if address.Family().IsDomain() && address.Domain() == "localhost" {
address = net.LocalHostIP
}
if address.Family().IsDomain() {
return nil, newError("domain address is not allowed for listening: ", address.Domain())
}
protocol := settings.ProtocolName
listenFunc := transportListenerCache[protocol]
if listenFunc == nil {
return nil, newError(protocol, " listener not registered.").AtError()
}
listener, err := listenFunc(ctx, address, port, settings, handler)
if err != nil {
return nil, newError("failed to listen on address: ", address, ":", port).Base(err)
}
return listener, nil
}
// ListenSystem listens on a local address for incoming TCP connections.
//
// xray:api:beta
func ListenSystem(ctx context.Context, addr net.Addr, sockopt *SocketConfig) (net.Listener, error) {
return effectiveListener.Listen(ctx, addr, sockopt)
}
// ListenSystemPacket listens on a local address for incoming UDP connections.
//
// xray:api:beta
func ListenSystemPacket(ctx context.Context, addr net.Addr, sockopt *SocketConfig) (net.PacketConn, error) {
return effectiveListener.ListenPacket(ctx, addr, sockopt)
}