mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-06-26 09:25:23 +00:00
107 lines
3.4 KiB
Go
107 lines
3.4 KiB
Go
package internet
|
|
|
|
import (
|
|
"context"
|
|
core "github.com/v2fly/v2ray-core/v4"
|
|
"github.com/v2fly/v2ray-core/v4/features/routing"
|
|
|
|
"github.com/v2fly/v2ray-core/v4/common/net"
|
|
"github.com/v2fly/v2ray-core/v4/common/session"
|
|
)
|
|
|
|
// Dialer is the interface for dialing outbound connections.
|
|
type Dialer interface {
|
|
// Dial dials a system connection to the given destination.
|
|
Dial(ctx context.Context, destination net.Destination) (Connection, error)
|
|
|
|
// Address returns the address used by this Dialer. Maybe nil if not known.
|
|
Address() net.Address
|
|
}
|
|
|
|
// dialFunc is an interface to dial network connection to a specific destination.
|
|
type dialFunc func(ctx context.Context, dest net.Destination, streamSettings *MemoryStreamConfig) (Connection, error)
|
|
|
|
var (
|
|
transportDialerCache = make(map[string]dialFunc)
|
|
)
|
|
|
|
// RegisterTransportDialer registers a Dialer with given name.
|
|
func RegisterTransportDialer(protocol string, dialer dialFunc) error {
|
|
if _, found := transportDialerCache[protocol]; found {
|
|
return newError(protocol, " dialer already registered").AtError()
|
|
}
|
|
transportDialerCache[protocol] = dialer
|
|
return nil
|
|
}
|
|
|
|
// Dial dials a internet connection towards the given destination.
|
|
func Dial(ctx context.Context, dest net.Destination, streamSettings *MemoryStreamConfig) (Connection, error) {
|
|
if dest.Network == net.Network_TCP {
|
|
if streamSettings == nil {
|
|
s, err := ToMemoryStreamConfig(nil)
|
|
if err != nil {
|
|
return nil, newError("failed to create default stream settings").Base(err)
|
|
}
|
|
streamSettings = s
|
|
}
|
|
|
|
protocol := streamSettings.ProtocolName
|
|
dialer := transportDialerCache[protocol]
|
|
if dialer == nil {
|
|
return nil, newError(protocol, " dialer not registered").AtError()
|
|
}
|
|
return dialer(ctx, dest, streamSettings)
|
|
}
|
|
|
|
if dest.Network == net.Network_UDP {
|
|
udpDialer := transportDialerCache["udp"]
|
|
if udpDialer == nil {
|
|
return nil, newError("UDP dialer not registered").AtError()
|
|
}
|
|
return udpDialer(ctx, dest, streamSettings)
|
|
}
|
|
|
|
return nil, newError("unknown network ", dest.Network)
|
|
}
|
|
|
|
// DialSystem calls system dialer to create a network connection.
|
|
func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
|
|
var src net.Address
|
|
if outbound := session.OutboundFromContext(ctx); outbound != nil {
|
|
src = outbound.Gateway
|
|
}
|
|
|
|
if transportLayerOutgoingTag := session.GetTransportLayerProxyTagFromContext(ctx); transportLayerOutgoingTag != "" {
|
|
return DialTaggedOutbound(ctx, dest, transportLayerOutgoingTag)
|
|
}
|
|
|
|
return effectiveSystemDialer.Dial(ctx, src, dest, sockopt)
|
|
}
|
|
|
|
func DialTaggedOutbound(ctx context.Context, dest net.Destination, tag string) (net.Conn, error) {
|
|
var dispatcher routing.Dispatcher
|
|
if err := core.RequireFeatures(ctx, func(dispatcherInstance routing.Dispatcher) {
|
|
dispatcher = dispatcherInstance
|
|
}); err != nil {
|
|
return nil, newError("Required Feature dispatcher not resolved").Base(err)
|
|
}
|
|
|
|
content := new(session.Content)
|
|
content.SkipDNSResolve = true
|
|
session.SetForcedOutboundTagToContext(ctx, tag)
|
|
|
|
ctx = session.ContextWithContent(ctx, content)
|
|
|
|
r, err := dispatcher.Dispatch(ctx, dest)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var readerOpt net.ConnectionOption
|
|
if dest.Network == net.Network_TCP {
|
|
readerOpt = net.ConnectionOutputMulti(r.Reader)
|
|
} else {
|
|
readerOpt = net.ConnectionOutputMultiUDP(r.Reader)
|
|
}
|
|
return net.NewConnection(net.ConnectionInputMulti(r.Writer), readerOpt), nil
|
|
}
|