lwIP - A Lightweight TCP/IP stack - Bugs: bug #54653, altcp_tls_mbedtls rx depends on...

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bug #54653: altcp_tls_mbedtls rx depends on TCP_WND

Submitter:	Simon Goldschmidt <goldsimon>
Submitted:	Wed 12 Sep 2018 08:42:30 PM UTC


Category:	None	Severity:	3 - Normal
Item Group:	None	Status:	None
Privacy:	Public	Assigned to:	goldsimon
Open/Closed:	Open	Planned Release:	None
lwIP version:	git head

Wed 12 Sep 2018 08:42:30 PM UTC, original submission:

As window updates are sent application-controlled when tcp_recved() is called, the current altcp_tls implementation for mbedtls has a problem that it needs TCP_WND to be > MBEDTLS_SSL_MAX_CONTENT_LEN or the connection may stall because the remote side cannot send a whole decryption fragment.

Application-controlled window updates are still better, but maybe altcp_tls connections need to override the announced window in this case (as the buffer space is allocated by mbedtls anyway, not via lwIP pbufs).

Simon Goldschmidt <goldsimon>

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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lwIP - A Lightweight TCP/IP stack - Bugs: bug #54653, altcp_tls_mbedtls rx depends on...

bug #54653: altcp_tls_mbedtls rx depends on TCP_WND

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