Re: Problem with checksum offloading on RPi3 (PF + Jails involved)
"Kristof Provost" <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm,gmane.os.freebsd.devel.hackers |
|---|---|
| Message-ID | <[email protected]> |
On 29 Oct 2020, at 16:30, Carsten Bäcker wrote: > Sure, i am willing to help. > > Device is a Raspberry Pi 3B (not +), using the onboard-ethernet. > I attached a bunch of information. > > Configuration is stripped down to the minimum required to reproduce > the > problem. > Okay, so that’s an SMC2 LAN9514_ETH device. That’s the dev/usb/net/if_smsc.c driver. However, before we dig into that driver we should make sure that we’re really looking at a checksum problem. It’s entirely normal for TX checksums to be incorrect when logged on the sending host itself (if the hardware does checksum offloading the checksum in the packet sent to the MAC is incorrect, and left to the hardware to fix). So, can you confirm that the `"[bad udp cksum 0xe58a -> 0x482d!]` you reported was on an inbound packet? And let’s be safe: try to capture packets on a different machine. That’ll give us the true packet, after the hardware has done checksum calculations. Best regards, Kristof _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"