acl chandle + direction + l2cap-CID to uniquely identify a single specific
flow of PDU packets.
So we need to pass the chandle upp from acl to l2cap at least.
It would have been nice to handle this using "conversations" but the bluetooth
stack does not eaily map to the idiom host:port<->host:port
instead in bluetooth you have unidirectional flows that are identified by ACL-chandle:L2CAP-CID:direction and additional state held inside l2cap would attach two such flows together into a "conversation".
Bluetooth packets themself only indentify "half" of the two way conversation.
svn path=/trunk/; revision=18218
Ronnie Sahlberg