Messages in this thread | | | Date | Thu, 6 Dec 2007 12:34:23 -0600 | From | Matt Mackall <> | Subject | Re: a problem with NETPOLL/KGDBoE |
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On Thu, Dec 06, 2007 at 08:22:15PM +0200, Ramagudi Naziir wrote: > Hi all, > > It's probably only me, but I can't connect to a kgdb host because > of bouncing ICMP unreachables. I'll be glad if you could take a look > to see if it's a bug or not. > > Details: > - running a cloned version of kgdb_2.6.23 branch of Jason's > git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb.git > > - "modprobe kgdboe kgdboe='@10.0.0.28/,@10.0.0.11/'" works fine, > and var/log/messages get filled with six kgdboe network configuration > messages (local port 6443, local ip 10.0.0.28, interface eth0, > remote port 6442, remote ip 10.0.0.11, remote mac ff:ff:ff:ff:ff:ff).
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> 19:30:53.424248 IP 10.0.0.11.32785 > 10.0.0.28.6433: UDP, length 5 > 19:30:53.424323 IP 10.0.0.11.32785 > 10.0.0.28.6433: UDP, length 14
Hmmm, 6443 != 6433 (typo?) and 32785 != 6442 (config problem). Yes, netpoll will ignore incoming UDP -from- the wrong port/ip/mac, since it's otherwise bypassing the firewall layer. And of course, it won't accept packets -to- the wrong address either. I forget how to deal with the source address issue in connection with GDB, perhaps Jason will remind us.
-- Mathematics is the supreme nostalgia of our time.
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