Thanks Thadeu.
If we have to fix it, where should we add the code to validate the IP header
checksum?
-Thanks
From: Thadeu Lima de Souza Cascardo <[email protected]>
To: [email protected]
Cc: Discuss <[email protected]>
Sent: Thursday, October 27, 2016 4:53 PM
Subject: Re: [ovs-discuss] openvswitch-2.5.0, mcast-snooping patch isn't
validating IP checksum
On Thu, Oct 27, 2016 at 10:10:19PM +0000, [email protected] wrote:
> Using openvswitch-2.5.0, user-space mode with Linux 2.6 based kernels.IGMP
> packets from NIC driver are handed over to Linux stack using netif_rx().
> openvswitch is picking packets from net_device using netlink.
> As this path bypasses Linux kernel's IP stack, Linux kernel isn't validating
> IP checksum.
> Looks like, when packet enters vswitchd, it doesn't seem to validate IP
> header checksum for the IGMP packets and
> is directly delivering them to mcast-snoop module.
> Is this a deliberate one to skip validating IP header checksum for IGMP
> packets in this scenario or I am missing something here.
> -Thanks
>
That could be considered a bug. Thanks for the report.
Thadeu Cascardo.
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