Wireshark mailing list archives

Does Wireshark uses a pseudo-header for VRRPv3 IPv4 checksum calculation?


From: "Santos, Edgar 2. (EXT-UpgradeM - PT/Amadora)" <edgar.2.santos.ext () nsn com>
Date: Mon, 29 Oct 2012 15:35:19 +0100

According to draft-ietf-vrrp-ipv6-spec-08 (VRRPv3) IPv4 is defined in
RFC3768 (VRRPv2). 
"This protocol is intended for use with IPv6 routers only. VRRP for IPv4
is defined in VRRP-V4
<http://tools.ietf.org/html/draft-ietf-vrrp-ipv6-spec-08> ." , sentence
from draft-ietf-vrrp-ipv6-spec-08, section 1.1 - Scope
It appears that Wireshark uses the pseudo-header in the checksum
calculation for IPv4 and for IPv6. For me the pseudo-header should be
used for IPv6 as defined in the draft but should not be used in IPv4
since it doesn't appear in the checksum calculation defined in the
section 5.3.8. of RFC3768.
Could you confirm that the Wireshark's checksum calculation for VRRPv3
uses a pseudo-header even for IPv4? It is intentional or a bug?

This question was also posted in Wireshark Q&A under:
http://ask.wireshark.org/questions/15291/does-wireshark-uses-a-pseudo-he
ader-for-vrrpv3-ipv4-checksum-calculation


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