Re: [ecf-dev] Problem with SLP discovery

[Bryan Hunt <bhunt@xxxxxxx>]

On Jun 3, 2009, at 5:40 AM, Markus Alexander Kuppe wrote:

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> Bryan Hunt wrote:
> > I'm playing around with SLP and I've run into a problem.  When  
> > SLPCore
> > (line 807) executes socket.setInterface(addr); I'm getting:
> >
> > ch.ethz.iks.slp.ServiceLocationException: Can't assign requested  
> > address
> > at ch.ethz.iks.slp.impl.SLPCore.multicastConvergence(SLPCore.java: 
> > 915)
> > at ch.ethz.iks.slp.impl.LocatorImpl.sendRequest(LocatorImpl.java:267)
> > at  
> > ch.ethz.iks.slp.impl.LocatorImpl.findServiceTypes(LocatorImpl.java: 
> > 114)
> > at
> > org 
> > .eclipse 
> > .ecf 
> > .internal 
> > .provider 
> > .jslp 
> > .LocatorDecoratorImpl.findServiceTypes(LocatorDecoratorImpl.java:54)
> > at
> > org 
> > .eclipse 
> > .ecf 
> > .internal 
> > .provider 
> > .jslp.LocatorDecoratorImpl.getServiceURLs(LocatorDecoratorImpl.java: 
> > 106)
> > at
> > org 
> > .eclipse 
> > .ecf 
> > .internal.provider.jslp.JSLPDiscoveryJob.run(JSLPDiscoveryJob.java: 
> > 43)
> > at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
> >
> > When it executes socket.setInterface(addr), it's using my first IP
> > address which happens to be my work VPN assigned IP address.  If I  
> > set
> >
> > -Dnet.slp.interfaces=192.168.1.10
> >
> > and use my local network, everything works just fine.  Ultimately, I
> > need to use SLP with a static DA which will reside on my work network
> > and will be accessed by customers using VPN from home.  Any idea  
> > why I
> > see the problem when using my work VPN IP address, and any ideas on a
> > solution such that I can eventually use a static DA?
>
> This sounds like a problem with the network interface that's created  
> by
> the VPN software. Apparently Java is unable to assign an address. I#ve
> been seeing the same Exception with the iPhone jamvm/gnu classpath.  
> I'm
> pretty sure this issue can be isolated from jSLP. Try using a newer  
> VM.
> What OS/Version/... are you using anyway?

I'm using OS X with Java 1.5 for my testing.  Ultimately, I need to  
run on Windows and Linux using a variety of JVM versions.

> Otherwise jSLP 2.0 uses APR to handle the low-level network stuff.  
> Maybe
> that's going to help you.

I don't think I'm going to be able to use jSLP 2.0 as it appears to  
require native code, and appears to be vaporware as of today.

I need a working solution in a few days, so I'm thinking I'm going to  
hack my own discovery provider until one of these other solutions  
proves itself as a viable solution in my environment.

> Markus
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