On Tue, Apr 12, 2011 at 01:36:01PM -0600, Levi Pearson wrote: > On Tue, Apr 12, 2011 at 12:59 PM, Dave Smith <d...@thesmithfam.org> wrote: > > I've been using tc/netem to do things *like* this, but it has a few > > drawbacks: > > > > 1. tc requires root access
> You're going to either need root to create tun/tap devices, or you'll > need to virtualize the system your code runs on so that the virtual > machine presents an ethernet device that really connects to some sort > of pipe. I agree with Levi's statement. Dave, is there a way to get around having root access that I haven't thought about? The only thing that I could think of would be using a network simulator like ns or omnet, but I think network simulation would pair poorly with what you're trying to accomplish. > > 2. tc is sophisticated (does a *lot* more than I want) Then just use part of it. :) > > 3. tc has a tricky command line interface > > > > I'm thinking this might be a good stand-alone executable that would be > > well suited to Google Go. > > If you're okay with using root access to create a couple of tap/tun > devices, you could easily link them with a simple program. Here's a > tutorial: http://backreference.org/2010/03/26/tuntap-interface-tutorial/ A nice tool to configure tunnels and netem would be really interesting. I envision such a tool tying in with the netem functionality in the kernel, and it wouldn't necessarily need to use tc. But it sounds like maybe Dave has something else in mind. -- Andrew McNabb http://www.mcnabbs.org/andrew/ PGP Fingerprint: 8A17 B57C 6879 1863 DE55 8012 AB4D 6098 8826 6868 /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
