func Dial(dest v2net.Destination) (net.Conn, error) {
var ip net.IP
if dest.Address().IsIPv4() || dest.Address().IsIPv6() {
ip = dest.Address().IP()
} else {
ips, err := net.LookupIP(dest.Address().Domain())
if err != nil {
return nil, err
}
if len(ips) == 0 {
return nil, ErrInvalidHost
}
ip = ips[dice.Roll(len(ips))]
}
if dest.IsTCP() {
return net.DialTCP("tcp", nil, &net.TCPAddr{
IP: ip,
Port: int(dest.Port()),
})
} else {
return net.DialUDP("udp", nil, &net.UDPAddr{
IP: ip,
Port: int(dest.Port()),
})
}
}
func Dial(dest v2net.Destination) (net.Conn, error) {
if dest.Address().IsDomain() {
dialer := &net.Dialer{
Timeout: time.Second * 60,
DualStack: true,
}
network := "tcp"
if dest.IsUDP() {
network = "udp"
}
return dialer.Dial(network, dest.NetAddr())
}
ip := dest.Address().IP()
if dest.IsTCP() {
return net.DialTCP("tcp", nil, &net.TCPAddr{
IP: ip,
Port: int(dest.Port()),
})
} else {
return net.DialUDP("udp", nil, &net.UDPAddr{
IP: ip,
Port: int(dest.Port()),
})
}
}
func Dial(src v2net.Address, dest v2net.Destination, settings *StreamSettings) (Connection, error) {
var connection Connection
var err error
if dest.IsTCP() {
switch {
case settings.IsCapableOf(StreamConnectionTypeTCP):
connection, err = TCPDialer(src, dest)
case settings.IsCapableOf(StreamConnectionTypeKCP):
connection, err = KCPDialer(src, dest)
case settings.IsCapableOf(StreamConnectionTypeRawTCP):
connection, err = RawTCPDialer(src, dest)
default:
return nil, ErrUnsupportedStreamType
}
if err != nil {
return nil, err
}
if settings.Security == StreamSecurityTypeNone {
return connection, nil
}
config := settings.TLSSettings.GetTLSConfig()
if dest.Address().IsDomain() {
config.ServerName = dest.Address().Domain()
}
tlsConn := tls.Client(connection, config)
return v2tls.NewConnection(tlsConn), nil
}
return UDPDialer(src, dest)
}
// @Private
func (this *Router) ResolveIP(dest v2net.Destination) []v2net.Destination {
ips := this.dnsServer.Get(dest.Address().Domain())
if len(ips) == 0 {
return nil
}
dests := make([]v2net.Destination, len(ips))
for idx, ip := range ips {
if dest.IsTCP() {
dests[idx] = v2net.TCPDestination(v2net.IPAddress(ip), dest.Port())
} else {
dests[idx] = v2net.UDPDestination(v2net.IPAddress(ip), dest.Port())
}
}
return dests
}
// @Private
func (this *FreedomConnection) ResolveIP(destination v2net.Destination) v2net.Destination {
if !destination.Address().IsDomain() {
return destination
}
ips := this.dns.Get(destination.Address().Domain())
if len(ips) == 0 {
log.Info("Freedom: DNS returns nil answer. Keep domain as is.")
return destination
}
ip := ips[dice.Roll(len(ips))]
var newDest v2net.Destination
if destination.IsTCP() {
newDest = v2net.TCPDestination(v2net.IPAddress(ip), destination.Port())
} else {
newDest = v2net.UDPDestination(v2net.IPAddress(ip), destination.Port())
}
log.Info("Freedom: Changing destination from ", destination, " to ", newDest)
return newDest
}
func DialToDest(src v2net.Address, dest v2net.Destination) (net.Conn, error) {
dialer := &net.Dialer{
Timeout: time.Second * 60,
DualStack: true,
}
if src != nil && src != v2net.AnyIP {
var addr net.Addr
if dest.IsTCP() {
addr = &net.TCPAddr{
IP: src.IP(),
Port: 0,
}
} else {
addr = &net.UDPAddr{
IP: src.IP(),
Port: 0,
}
}
dialer.LocalAddr = addr
}
return dialer.Dial(dest.Network().String(), dest.NetAddr())
}