ginuerzh
90 lines
1.8 KiB
Go
90 lines
1.8 KiB
Go
package tun
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/go-gost/core/handler"
|
|
md "github.com/go-gost/core/metadata"
|
|
ctxvalue "github.com/go-gost/x/ctx"
|
|
tun_util "github.com/go-gost/x/internal/util/tun"
|
|
"github.com/go-gost/x/registry"
|
|
"github.com/xjasonlyu/tun2socks/v2/core"
|
|
)
|
|
|
|
func init() {
|
|
registry.HandlerRegistry().Register("vtun", NewHandler)
|
|
}
|
|
|
|
type tunHandler struct {
|
|
options handler.Options
|
|
}
|
|
|
|
func NewHandler(opts ...handler.Option) handler.Handler {
|
|
options := handler.Options{}
|
|
for _, opt := range opts {
|
|
opt(&options)
|
|
}
|
|
|
|
return &tunHandler{
|
|
options: options,
|
|
}
|
|
}
|
|
|
|
func (h *tunHandler) Init(md md.Metadata) (err error) {
|
|
if err = h.parseMetadata(md); err != nil {
|
|
return
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (h *tunHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
|
|
defer conn.Close()
|
|
|
|
log := h.options.Logger
|
|
|
|
var config *tun_util.Config
|
|
if v, _ := conn.(md.Metadatable); v != nil {
|
|
config = v.Metadata().Get("config").(*tun_util.Config)
|
|
}
|
|
if config == nil {
|
|
err := errors.New("tun: wrong connection type")
|
|
log.Error(err)
|
|
return err
|
|
}
|
|
|
|
start := time.Now()
|
|
log = log.WithFields(map[string]any{
|
|
"remote": conn.RemoteAddr().String(),
|
|
"local": conn.LocalAddr().String(),
|
|
"sid": string(ctxvalue.SidFromContext(ctx)),
|
|
})
|
|
|
|
log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
|
|
defer func() {
|
|
log.WithFields(map[string]any{
|
|
"duration": time.Since(start),
|
|
}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
|
|
}()
|
|
|
|
th := newTransportHandler(&h.options)
|
|
th.ProcessAsync()
|
|
defer th.Close()
|
|
|
|
stack, err := core.CreateStack(&core.Config{
|
|
LinkEndpoint: newEndpoint(conn, config.MTU, log),
|
|
TransportHandler: th,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stack.Close()
|
|
|
|
<-ctx.Done()
|
|
|
|
return nil
|
|
}
|