netdev - Re: [PATCH] Fix bug of update IPv4 PMTU when received ICMP Fragmentation Needed message

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Message-ID: <4663A561.7070300@cn.fujitsu.com>
Date:	Mon, 04 Jun 2007 13:38:41 +0800
From:	Wei Yongjun <yjwei@...fujitsu.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH] Fix bug of update IPv4 PMTU when received ICMP Fragmentation
 Needed message

I know, I misunderstand the iph->tot_len, the ICMP payload is not 
contained a valid ipv4 packet.
I do this under IPv6, it has no problem because IPv6 does not check 
this. ^_^

Thank you very much.
> But this is not the old_mtu field that we were talking about.  The
> old_mtu field comes from iph->tot_len which is the length of field
> in the *original* IP header.  We're certainly not allowed touch that
> field.
>
> Cheers,
>   


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