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|
package socket
import (
"context"
"tunnel/pkg/server/env"
"tunnel/pkg/server/queue"
)
type deferSocket struct {
dialSocket
}
type deferConn struct {
s *deferSocket
e env.Env
ctx context.Context
cancel func()
conn chan *conn
}
func (s *deferSocket) New(env env.Env) (Conn, error) {
ctx, cancel := context.WithCancel(context.TODO())
c := &deferConn{
s: s,
e: env,
conn: make(chan *conn),
ctx: ctx,
cancel: cancel,
}
return c, nil
}
func (c *deferConn) String() string {
return "defer"
}
func (c *deferConn) Send(wq queue.Q) error {
conn := <-c.conn
if conn == nil {
return nil
}
return conn.Send(wq)
}
func (c *deferConn) Recv(rq queue.Q) error {
// TODO: and context check
r := rq.Reader()
if _, err := r.Read(nil); err != nil {
c.conn <- nil
return nil
}
conn, err := dial(c.ctx, c.e, c.s.Proto, c.s.Addr)
if err != nil {
c.conn <- nil
return err
}
go func() {
<-c.ctx.Done()
conn.Close()
}()
c.conn <- conn
return queue.IoCopy(r, conn)
}
func (c *deferConn) Close() error {
c.cancel()
return nil
}
func init() {
register("defer", "deferred 'dial' after first sending", deferSocket{})
}
|
