sing-box/outbound/socks.go
2022-09-25 14:44:39 +08:00

113 lines
3.3 KiB
Go

package outbound
import (
"context"
"net"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/dialer"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
"github.com/sagernet/sing/common/uot"
"github.com/sagernet/sing/protocol/socks"
)
var _ adapter.Outbound = (*Socks)(nil)
type Socks struct {
myOutboundAdapter
client *socks.Client
resolve bool
uot bool
}
func NewSocks(router adapter.Router, logger log.ContextLogger, tag string, options option.SocksOutboundOptions) (*Socks, error) {
detour := dialer.New(router, options.DialerOptions)
var version socks.Version
var err error
if options.Version != "" {
version, err = socks.ParseVersion(options.Version)
} else {
version = socks.Version5
}
if err != nil {
return nil, err
}
return &Socks{
myOutboundAdapter{
protocol: C.TypeSocks,
network: options.Network.Build(),
router: router,
logger: logger,
tag: tag,
},
socks.NewClient(detour, options.ServerOptions.Build(), version, options.Username, options.Password),
version == socks.Version4,
options.UoT,
}, nil
}
func (h *Socks) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound connection to ", destination)
case N.NetworkUDP:
if h.uot {
h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination)
tcpConn, err := h.client.DialContext(ctx, N.NetworkTCP, M.Socksaddr{
Fqdn: uot.UOTMagicAddress,
Port: destination.Port,
})
if err != nil {
return nil, err
}
return uot.NewClientConn(tcpConn), nil
}
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
default:
return nil, E.Extend(N.ErrUnknownNetwork, network)
}
if h.resolve && destination.IsFqdn() {
addrs, err := h.router.LookupDefault(ctx, destination.Fqdn)
if err != nil {
return nil, err
}
return N.DialSerial(ctx, h.client, network, destination, addrs)
}
return h.client.DialContext(ctx, network, destination)
}
func (h *Socks) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
if h.uot {
h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination)
tcpConn, err := h.client.DialContext(ctx, N.NetworkTCP, M.Socksaddr{
Fqdn: uot.UOTMagicAddress,
Port: destination.Port,
})
if err != nil {
return nil, err
}
return uot.NewClientConn(tcpConn), nil
}
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
return h.client.ListenPacket(ctx, destination)
}
func (h *Socks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
return NewConnection(ctx, h, conn, metadata)
}
func (h *Socks) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
return NewPacketConnection(ctx, h, conn, metadata)
}