buglwIP - 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

Submitted by:  Simon Goldschmidt <goldsimon>
Submitted on:  Wed 12 Sep 2018 08:42:30 PM UTC  
 
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  Simon Goldschmidt <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>
Project AdministratorIn charge of this item.

 

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