Tulir Asokan
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
package mtproto
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import (
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"fmt"
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"github.com/go-faster/errors"
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"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
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"go.mau.fi/mautrix-telegram/pkg/gotd/mt"
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"go.mau.fi/mautrix-telegram/pkg/gotd/proto"
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)
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type badMessageError struct {
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Code int
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NewSalt int64
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TimeResynced bool
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}
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const (
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codeMessageIDTooLow = 16
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codeMessageIDTooHigh = 17
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codeIncorrectServerSalt = 48
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)
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func (c badMessageError) Error() string {
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description := map[int]string{
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codeMessageIDTooLow: "msg_id too low",
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codeMessageIDTooHigh: "msg_id too high",
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codeIncorrectServerSalt: "incorrect server salt",
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18: "incorrect two lower order msg_id bits",
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19: "container msg_id is the same as msg_id of a previously received message",
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20: "message too old",
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32: "msg_seqno too low",
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33: "msg_seqno too high",
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34: "even msg_seqno expected, but odd received",
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35: "odd msg_seqno expected, but even received",
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}[c.Code]
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if description == "" {
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return fmt.Sprintf("bad msg error code %d", c.Code)
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}
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return description
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}
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func (c *Conn) handleBadMsg(msgID int64, b *bin.Buffer) error {
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now := c.clock.Now()
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id, err := b.PeekID()
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if err != nil {
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return err
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}
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switch id {
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case mt.BadMsgNotificationTypeID:
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var bad mt.BadMsgNotification
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if err := bad.Decode(b); err != nil {
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return err
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}
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var resynced bool
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if !c.hasServerTimeOffset() && (bad.ErrorCode == codeMessageIDTooLow || bad.ErrorCode == codeMessageIDTooHigh) {
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created := proto.MessageID(msgID).Time()
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c.setServerTimeOffset(created.Sub(now))
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c.messageID.Reset()
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c.updateSalt()
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resynced = true
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}
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c.rpc.NotifyError(bad.BadMsgID, &badMessageError{Code: bad.ErrorCode, TimeResynced: resynced})
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return nil
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case mt.BadServerSaltTypeID:
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var bad mt.BadServerSalt
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if err := bad.Decode(b); err != nil {
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return err
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}
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c.rpc.NotifyError(bad.BadMsgID, &badMessageError{Code: bad.ErrorCode, NewSalt: bad.NewServerSalt})
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return nil
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default:
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return errors.Errorf("unknown type id 0x%d", id)
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}
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}
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