Wrote the code last night, still untested. "It compiles, let's ship!" Well, no... I'll see how it acts on my own systems for a while, then post it. Here's some tidbits:

• ZMan pointed out that in his network (and many others, I'm sure), network services like ICMP and DNS are questionable. So I made two command line options -- use /ping to make it ping the core, use /file to make it use UNC to access a small file (ldlogon/ldiscn.vroot) from the core. You can't use both together, and you can't specify the file, and you can't use HTTP... if any of those are a problem, sing out.
• I set up an in-memory change semaphore... If I had to make changes, that's a good indication that inventory needs to be refreshed at the core. If we're coming from direct to gateway, miniscan won't work and a regular scan should be sent. If we're coming from gateway to direct, a miniscan would work, but a a regular scan will probably initiate the out-of-sync process (which I might as well start now). Why am I assuming that inventory scans from gateway devices are out of sync? Because I'm assuming at least some amount of "open the lid for 1 or 2 minutes and then re-suspend the laptop" activity. So, if there was a change, I'm going to initiate a regular inventory scan.
• Logging is non-existent unless you use the /debug flag... this script could potentially run often, and is intended to be transparent and fast. Again, sing out if that's an issue.

I don't do advanced editing of agents, I think it's bad practice to have hidden stuff. IMHO, this should be deployed as a policy to machines with laptop chassis types. But if Joe wants to post an installer, that's fine -- he just needs to create an account on droppedpackets and he can add it to the host folder.

It's tested and working on several systems, so I'm opening the doors and calling it released. http://www.droppedpackets.org/management-gateway-and-remote-control/ldms_auto_gateway

Installation is through a custom vulnerability at this time, as that's the easiest way to inject and/or modify a local scheduler task. The program checks at run time that the agent it's on is configured to use a gateway and exits if there's no certificate.

Just posted version 1.0.4 with some nice changes. Among other things, it's a smaller binary. http://www.droppedpackets.org/management-gateway-and-remote-control/ldms_auto_gateway