Re: [PATCH 0/4] Fix check for incorrect or missing sequence mumbers in ICMP(v6) message

[Gerrit Renker <gerrit@xxxxxxxxxxxxxx>]

> Agree, I will fix the patch. I think she header size of 8 may be caome  
> from the tcp code^_^?
Yes, it is the same in tcp_v4_err() in net/ipv4/tcp_ipv4.c and I think
that is because of RFC 1122, 3.2.2: 
 "Every ICMP error message includes the Internet header and at
  least the first 8 data octets of the datagram that triggered
  the error; more than 8 octets MAY be sent; this header and data
  MUST be unchanged from the received datagram."

In TCP it is possible to get at the sequence number with the first 8
octets, in DCCP this is at least 12 bytes as correctly pointed out by
your patch changelog.
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