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package outbound
import (
"context"
"os"
"github.com/sagernet/sing/common/uot"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/transport/internet"
"github.com/xtls/xray-core/transport/internet/stat"
)
func (h *Handler) getUoTConnection(ctx context.Context, dest net.Destination) (stat.Connection, error) {
if dest.Address == nil {
return nil, newError("nil destination address")
}
if !dest.Address.Family().IsDomain() {
return nil, os.ErrInvalid
}
var uotVersion int
if dest.Address.Domain() == uot.MagicAddress {
uotVersion = uot.Version
} else if dest.Address.Domain() == uot.LegacyMagicAddress {
uotVersion = uot.LegacyVersion
} else {
return nil, os.ErrInvalid
}
packetConn, err := internet.ListenSystemPacket(ctx, &net.UDPAddr{IP: net.AnyIP.IP(), Port: 0}, h.streamSettings.SocketSettings)
if err != nil {
return nil, newError("unable to listen socket").Base(err)
}
conn := uot.NewServerConn(packetConn, uotVersion)
return h.getStatCouterConnection(conn), nil
}