I did a little sniffing and discovered it is using soap to communicate.
Here are some details for those who understand soap. The IP of the Blu-ray player is 192.168.1.155
1
0
urn:schemas-upnp-org:device:Basic:1
Blu-ray Disc Player
Sony Corporation
http://www.sony.net/
Blu-ray Disc Player
uuid:00000000-0000-1010-8000-0024bef6e4ce
urn:schemas-sony-com:service:IRCC:1
urn:schemas-sony-com:serviceId:IRCC
/IRCCSCPD.xml
/upnp/control/IRCC
/upnp/event/IRCC
1.0
AAMAABxa
1.0
[Link: 192.168.1.155]
[Link: 192.168.1.155]
BDPlayer2010
And here is what the remote is sending for an up command.
<
AAAAAAAAHFoAAAA6AQ==
Email at my google email address with is bjdraw and I'll email you some pcap files with more.