tree e8b659dbbec411e2d4f6a24dd0ebc2fac1b0c7cd
parent 1ab1c6bd6808e9d3d1a5cace45a3f513da7a811e
author Vernon Mauery <vernon.mauery@linux.intel.com> 1623194685 -0700
committer Vernon Mauery <vernon.mauery@linux.intel.com> 1623526489 -0700

Only allow IPMI1.5 for non-session requests

Some IPMI messages must be sent out-of-session in order to set up the
session. In order to be counted as out-of-session, they must use the
0x00000000 session ID. And the only IPMI1.5 packets that are allowed in
OpenBMC are the out-of-session messages used to initiate the RMCP+
sessions. This commit enforces that all messages that contain a non-zero
session ID must be a part of a valid session, which means they must be
RMCP2.0 messages because RMCP1.5 sessions are not supported.

Tested: 1) establish a session; send an RMCP1.5 message with that same
           session ID and see that it gets rejected.
        2) establish a session; send an RMCP2.0 message with a 0 session
           ID and see that it gets rejected.

Change-Id: I01e33f1d8ea9b9c6972238eaaf1b032493f46953
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>