[sane-devel] BJNP protocol

Louis Lagendijk louis at fazant.net
Fri Oct 13 21:02:08 UTC 2017


On Fri, 2017-10-13 at 18:51 +0000, Ralph Little wrote:
> Hi,
> Do any of the SANE Pixma devs (I guess primarily Rolf) have any
> documentation of the BJNP protocol so far as scanning is concerned?
> If so, could I get a hold of a copy?
> I guess I could figure it out with a code read but if someone had
> something written down, then that would save me a lot of work.
> 
> Cheers,
> Ralph
> 
Hi Ralph
No there is no documentation.  reverse engineered the protocol based on
the traces of the Ip-packets.
So reading the code (especially pixma_bjnp_private.h) is the way to go.
Most communication happens using UDP, but the transfer of the scanned
data happens over TCP.

Cheers, Louis 
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