sing-box/common/dialer/conntrack/packet_conn.go
2023-03-03 21:59:54 +08:00

52 lines
875 B
Go

package conntrack
import (
"net"
"runtime/debug"
"github.com/sagernet/sing/common/x/list"
)
type PacketConn struct {
net.PacketConn
element *list.Element[*ConnEntry]
}
func NewPacketConn(conn net.PacketConn) *PacketConn {
entry := &ConnEntry{
Conn: conn,
Stack: debug.Stack(),
}
connAccess.Lock()
element := openConnection.PushBack(entry)
connAccess.Unlock()
return &PacketConn{
PacketConn: conn,
element: element,
}
}
func (c *PacketConn) Close() error {
if c.element.Value != nil {
connAccess.Lock()
if c.element.Value != nil {
openConnection.Remove(c.element)
c.element.Value = nil
}
connAccess.Unlock()
}
return c.PacketConn.Close()
}
func (c *PacketConn) Upstream() any {
return c.PacketConn
}
func (c *PacketConn) ReaderReplaceable() bool {
return true
}
func (c *PacketConn) WriterReplaceable() bool {
return true
}