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[lwip-devel] [bug #61558] Possibly faulty behaviour on receiving large p

From: Simon Goldschmidt
Subject: [lwip-devel] [bug #61558] Possibly faulty behaviour on receiving large payloads with mqtt+tls causing disconnect
Date: Mon, 29 Nov 2021 03:11:42 -0500 (EST)
User-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Follow-up Comment #9, bug #61558 (project lwip):

I think I know what you mean. And maybe this can be fixed for this mqtt case
by chaining packets together. However, it is perfectly valid for any mqtt
server's TCP stack to send out responses in split packets.

In fact, the TCP spec allows the sending TCP to split packets at any byte
boundary. Even sending many packets with 1 byte each would be allowed. If mqtt
cannot handle this, it needs fixing.

Merging back packets in the altcp_tls code can only be a performance
improvement, not a bugfix.


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