Hi Bertil Engelholm,
Currently MDS is using reliable connectionless SOCK_RDM socket for
sending/receiving message `tipc_cb.BSRsock = socket(AF_TIPC, SOCK_RDM, 0);`
When connectionless socket (SOCK_RDM ) used, a return value of 0 indicates the
return of an undelivered data message that was originally sent by this socket.
Send can fail because of multiple reasons such as Overload, the current code is
handing this and aborting the application in send field conditions.
According to this ticket description some application can send an empty message
(length 0) to a MDS TIPC port and length 0 is NOT possible if the application
is using MDS lib , why because their will be MDS header.
Can you please share the application to send an empty message (length 0) ?
-AVM
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** [tickets:#1227] MDS: Receiving zero bytes result in abort**
**Status:** assigned
**Milestone:** 4.6.FC
**Created:** Tue Dec 02, 2014 02:34 PM UTC by Bertil Engelholm
**Last Updated:** Wed Dec 03, 2014 03:55 AM UTC
**Owner:** A V Mahesh (AVM)
If someone sends an empty message (lenght 0) to a MDS TIPC port it will result
in a restart of that component due to an abort in the MDS TIPC part. This
should of course not happen normally but this abort can be used by someone
(hackers) wanting to cause restarts of components. So the abort (replace with
continue?) should be removed and the log entry should be changed.
/Bertil
---
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