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58 lines
1.3 KiB
58 lines
1.3 KiB
3 years ago
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package mtproto
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import (
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"context"
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"github.com/gotd/td/bin"
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)
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func (c *Conn) writeContentMessage(ctx context.Context, msgID int64, seqNo int32, message bin.Encoder) error {
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return c.write(ctx, msgID, seqNo, message)
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}
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func (c *Conn) writeServiceMessage(ctx context.Context, message bin.Encoder) error {
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msgID, seqNo := c.nextMsgSeq(false)
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return c.write(ctx, msgID, seqNo, message)
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}
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var bufPool = bin.NewPool(0)
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func (c *Conn) write(ctx context.Context, msgID int64, seqNo int32, message bin.Encoder) error {
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// Grab shared lock for writing.
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// It prevents message sending during key regeneration if server forgot current auth key.
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c.exchangeLock.RLock()
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defer c.exchangeLock.RUnlock()
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b := bufPool.Get()
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defer bufPool.Put(b)
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if err := c.newEncryptedMessage(msgID, seqNo, message, b); err != nil {
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return err
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}
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if err := c.conn.Send(ctx, b); err != nil {
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return err
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}
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return nil
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}
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func (c *Conn) nextMsgSeq(content bool) (msgID int64, seqNo int32) {
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c.reqMux.Lock()
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defer c.reqMux.Unlock()
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msgID = c.newMessageID()
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// Computing current sequence number (seqno).
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// This should be serialized with new message id generation.
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//
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// See https://github.com/gotd/td/issues/245 for reference.
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seqNo = c.sentContentMessages * 2
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if content {
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seqNo++
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c.sentContentMessages++
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}
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return
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}
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