Possible clarifications for channel mask and event filters?

[mhalog78]

I think I understand that the channels are set in the channel mask as "channel enables". Set a bit to allow messages to/from that channel.
The docs should spell that out, I think.

On the contrary, an event filter seems to disable events, to reject them. Set a bit to not get a message. Again, this should be made clear in the docs.

Also, I see how these will affect incoming messages, allowing some and rejecting others. Do these filters also apply to output ports? If I enable only channels 1+2, and then send some messages on channel 6, will those messages get out? Yes, I know, that's a stupid thing to do, but I'm wondering how "far" the filters are applied. Input only? Both input and output?

Sorry for all the nit-picks. Thanks!