lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 23 May 2007 20:01:12 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	dm8tbr@...npma.org ("Thomas B. R??cker")
Cc:	shemminger@...ux-foundation.org, pg@...ureware.at,
	netdev@...r.kernel.org
Subject: Re: UDP checksum broken since 2.6.18?

"Thomas B. R??cker" <dm8tbr@...npma.org> wrote:
> Stephen Hemminger wrote:
>> The packet passed to packet capture programs may not have a valid checksum
>> if you have checksum offload configured on the device.  What kind of hardware
>> do you have on sender and receiver? 
> The c-snippet uses 127.x.x.x --> loopback

We never compute the complete checksum for loopback so that explains
the bogus checksum.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists