mirror of
https://github.com/mjl-/mox.git
synced 2024-12-27 08:53:48 +03:00
24 lines
596 B
Go
24 lines
596 B
Go
|
package mox
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"net"
|
||
|
|
"reflect"
|
||
|
|
)
|
||
|
|
|
||
|
|
func AsTLSAlert(err error) (alert uint8, ok bool) {
|
||
|
|
// If the remote client aborts the connection, it can send an alert indicating why.
|
||
|
|
// crypto/tls gives us a net.OpError with "Op" set to "remote error", an an Err
|
||
|
|
// with the unexported type "alert", a uint8. So we try to read it.
|
||
|
|
|
||
|
|
var opErr *net.OpError
|
||
|
|
if !errors.As(err, &opErr) || opErr.Op != "remote error" || opErr.Err == nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
v := reflect.ValueOf(opErr.Err)
|
||
|
|
if v.Kind() != reflect.Uint8 || v.Type().Name() != "alert" {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
return uint8(v.Uint()), true
|
||
|
|
}
|