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conn: generate error reply in more cases when trying to send invalid … #397

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merged 1 commit into from
Nov 9, 2024
Merged

conn: generate error reply in more cases when trying to send invalid … #397

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16 changes: 14 additions & 2 deletions conn.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ package dbus
import (
"context"
"errors"
"fmt"
"io"
"os"
"strings"
Expand Down Expand Up @@ -500,15 +501,26 @@ func (conn *Conn) sendMessageAndIfClosed(msg *Message, ifClosed func()) error {
return err
}

func isEncodingError(err error) bool {
switch err.(type) {
case FormatError:
return true
case InvalidMessageError:
return true
}
return false
}

func (conn *Conn) handleSendError(msg *Message, err error) {
if msg.Type == TypeMethodCall {
conn.calls.handleSendError(msg, err)
} else if msg.Type == TypeMethodReply {
if _, ok := err.(FormatError); ok {
if isEncodingError(err) {
// Make sure that the caller gets some kind of error response if
// the application code tried to respond, but the resulting message
// was malformed in the end
conn.sendError(err, msg.Headers[FieldDestination].value.(string), msg.Headers[FieldReplySerial].value.(uint32))
returnedErr := fmt.Errorf("destination tried to respond with invalid message (%w)", err)
conn.sendError(returnedErr, msg.Headers[FieldDestination].value.(string), msg.Headers[FieldReplySerial].value.(uint32))
}
}
conn.serialGen.RetireSerial(msg.serial)
Expand Down
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