mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-11-14 08:15:55 -05:00
115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
package tun
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/v2fly/v2ray-core/v5/common"
|
|
"github.com/v2fly/v2ray-core/v5/common/buf"
|
|
"github.com/v2fly/v2ray-core/v5/common/log"
|
|
"github.com/v2fly/v2ray-core/v5/common/net"
|
|
"github.com/v2fly/v2ray-core/v5/common/signal"
|
|
"github.com/v2fly/v2ray-core/v5/common/task"
|
|
"github.com/v2fly/v2ray-core/v5/features/policy"
|
|
"github.com/v2fly/v2ray-core/v5/features/routing"
|
|
"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
|
|
"gvisor.dev/gvisor/pkg/tcpip/stack"
|
|
"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
|
|
"gvisor.dev/gvisor/pkg/waiter"
|
|
)
|
|
|
|
const (
|
|
rcvWnd = 0 // default settings
|
|
maxInFlight = 2 << 10
|
|
)
|
|
|
|
type TCPHandler struct {
|
|
ctx context.Context
|
|
dispatcher routing.Dispatcher
|
|
policyManager policy.Manager
|
|
config *Config
|
|
|
|
stack *stack.Stack
|
|
}
|
|
|
|
func SetTCPHandler(ctx context.Context, dispatcher routing.Dispatcher, policyManager policy.Manager, config *Config) StackOption {
|
|
return func(s *stack.Stack) error {
|
|
tcpForwarder := tcp.NewForwarder(s, rcvWnd, maxInFlight, func(r *tcp.ForwarderRequest) {
|
|
wg := new(waiter.Queue)
|
|
linkedEndpoint, err := r.CreateEndpoint(wg)
|
|
if err != nil {
|
|
r.Complete(true)
|
|
return
|
|
}
|
|
defer r.Complete(false)
|
|
|
|
// TODO: set sockopt
|
|
|
|
tcpHandler := &TCPHandler{
|
|
ctx: ctx,
|
|
dispatcher: dispatcher,
|
|
policyManager: policyManager,
|
|
config: config,
|
|
stack: s,
|
|
}
|
|
|
|
if err := tcpHandler.Handle(gonet.NewTCPConn(wg, linkedEndpoint)); err != nil {
|
|
// TODO: log
|
|
// return newError("failed to handle tcp connection").Base(err)
|
|
}
|
|
|
|
})
|
|
s.SetTransportProtocolHandler(tcp.ProtocolNumber, tcpForwarder.HandlePacket)
|
|
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (h *TCPHandler) Handle(conn net.Conn) error {
|
|
sessionPolicy := h.policyManager.ForLevel(h.config.UserLevel)
|
|
|
|
addr := conn.RemoteAddr()
|
|
|
|
dest := net.DestinationFromAddr(addr)
|
|
ctx := log.ContextWithAccessMessage(h.ctx, &log.AccessMessage{
|
|
From: addr,
|
|
To: dest,
|
|
Status: log.AccessAccepted,
|
|
Reason: "",
|
|
})
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
|
|
link, err := h.dispatcher.Dispatch(ctx, dest)
|
|
if err != nil {
|
|
return newError("failed to dispatch").Base(err)
|
|
}
|
|
|
|
responseDone := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
|
|
|
|
if err := buf.Copy(link.Reader, buf.NewWriter(conn), buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transport all TCP response").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
requestDone := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
|
|
|
|
if err := buf.Copy(buf.NewReader(conn), link.Writer, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transport all TCP request").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
requestDoneAndCloseWriter := task.OnSuccess(requestDone, task.Close(link.Writer))
|
|
if err := task.Run(h.ctx, requestDoneAndCloseWriter, responseDone); err != nil {
|
|
common.Interrupt(link.Reader)
|
|
common.Interrupt(link.Writer)
|
|
return newError("connection ends").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|