DDSIRTP2 — Add Directed Write Parameter Id

Source:
Real-Time Innovations, Inc. (Ken Brophy, ken@rti.com)
Summary:
A directed write feature for tagging a sample with the GUID of the sample's single intended recipient must be supported with a new parameter Id to allow the GUID to be serialized as an inline parameter.

Resolution:
Add a new standard parameter Id, PID_DIRECTED_WRITE, with ID of 0x0057 and type of a sequence of GUIDs.

Revised Text:
Add following section:

8.7.6 Directed Write
Direct peer-to-peer communications may be enabled within the publish-subscribe framework of DDS by tagging samples with the handles of the intended recipient(s).

RTPS supports directed writes by using the inline QoS parameter extension mechanism. The serialized information denotes the GUIDs of the targeted readers.

When a writer sends such a directed sample, only the recipients with the matching parsed GUIDs accept the sample; all others acknowledge but absorb the sample, as if it was a GAP indicating a filtered sample.

Append to Table 9.13:
Name ID Type
PID_DIRECTED_WRITE 0x0057 sequence<GUID_t>

see above