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Date: Mon, 30 Nov 2009 15:04:30 -0500 From: Benjamin LaHaise <bcrl@...et.ca> To: Ben Greear <greearb@...delatech.com> Cc: "Eric W. Biederman" <ebiederm@...ssion.com>, Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org Subject: Re: RFC: net 00/05: routing based send-to-self implementation On Mon, Nov 30, 2009 at 11:37:31AM -0800, Ben Greear wrote: > This doesn't work if you want to have one application manage lots of > interfaces and send traffic between these interfaces. Certainly there are > use-cases that can use multiple name-spaces, but it's nice to have the > option not to use them as well. Actually, it's quite doable from within one application. An application I recently adapted to make use of multiple network namespaces within a single process by way of pthreads and unshare(CLONE_NEWNET). The scheme I used is to just open the socket in a new namespace in a thread. Since the file descriptor table is still shared, it's easy to send/receive data from any other thread, regardless of which virtual network namespace it's in. All told, setting up virtual routers with namespaces is pretty easy. -ben -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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