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Re: udp checksum

To: Ralf Baechle <>
Subject: Re: udp checksum
From: Rabeeh Khoury <>
Date: Fri, 28 Jan 2000 15:37:46 +0200
Cc: "" <>
References: <> <>
The Ethernet port is part of our new chip - GT96100 which is System
controller + 2 ethernet ports
+ 8 Serial ports (which can be configured as framerelay ports , ISDN and
many more protocols) +
2 PCI and other more.

so the ethernet port is an embedded port in the chip. as i have noted ; i
managed to ramp up
NFS over the system with full functionality. meaning that the packets are
sent and received correct
but the crc checksum is wrong in the udp (it uses functions included from

could it be that the error in checksum calculations is that i'm using big
mips configuration ?

Ralf Baechle wrote:

> On Thu, Jan 27, 2000 at 07:01:30PM -0500, Rabeeh Khoury wrote:
> > I'm having trouble with my ethernet driver on embedded system -
> > I managed to ramp the embedded system with NFS ; the problem is that
> > i have problems with udp packets checksum , which forced me change the
> > line to skb->ip_summed = CHECKSUM_UNNECESSARY instead of CHECKSUM_HW
> > which the last makes the udp layer to perform checksum.
> >
> > p.s. the data of the packets are all correct.
> >
> > the embedded system runs in big-endian mode.
> What Ethernet chip are you using?
>   Ralf

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