74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
|
package krpc
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"github.com/anacrolix/torrent/bencode"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
// These are documented in BEP 5.
|
||
|
|
ErrorCodeGenericError = 201
|
||
|
|
ErrorCodeServerError = 202
|
||
|
|
ErrorCodeProtocolError = 203
|
||
|
|
ErrorCodeMethodUnknown = 204
|
||
|
|
// BEP 44
|
||
|
|
ErrorCodeMessageValueFieldTooBig = 205
|
||
|
|
ErrorCodeInvalidSignature = 206
|
||
|
|
ErrorCodeSaltFieldTooBig = 207
|
||
|
|
ErrorCodeCasHashMismatched = 301
|
||
|
|
ErrorCodeSequenceNumberLessThanCurrent = 302
|
||
|
|
)
|
||
|
|
|
||
|
|
var ErrorMethodUnknown = Error{
|
||
|
|
Code: ErrorCodeMethodUnknown,
|
||
|
|
Msg: "Method Unknown",
|
||
|
|
}
|
||
|
|
|
||
|
|
// Represented as a string or list in bencode.
|
||
|
|
type Error struct {
|
||
|
|
Code int
|
||
|
|
Msg string
|
||
|
|
}
|
||
|
|
|
||
|
|
var (
|
||
|
|
_ bencode.Unmarshaler = (*Error)(nil)
|
||
|
|
_ bencode.Marshaler = (*Error)(nil)
|
||
|
|
_ error = Error{}
|
||
|
|
)
|
||
|
|
|
||
|
|
func (e *Error) UnmarshalBencode(_b []byte) (err error) {
|
||
|
|
var _v interface{}
|
||
|
|
err = bencode.Unmarshal(_b, &_v)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
switch v := _v.(type) {
|
||
|
|
case []interface{}:
|
||
|
|
func() {
|
||
|
|
defer func() {
|
||
|
|
r := recover()
|
||
|
|
if r == nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
err = fmt.Errorf("unpacking %#v: %s", v, r)
|
||
|
|
}()
|
||
|
|
e.Code = int(v[0].(int64))
|
||
|
|
e.Msg = v[1].(string)
|
||
|
|
}()
|
||
|
|
case string:
|
||
|
|
e.Msg = v
|
||
|
|
default:
|
||
|
|
err = fmt.Errorf(`KRPC error bencode value has unexpected type: %T`, _v)
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e Error) MarshalBencode() (ret []byte, err error) {
|
||
|
|
return bencode.Marshal([]interface{}{e.Code, e.Msg})
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e Error) Error() string {
|
||
|
|
return fmt.Sprintf("KRPC error %d: %s", e.Code, e.Msg)
|
||
|
|
}
|