From Francisco Vidal Meca via https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7136
HIP dissector: PUZZLE and SOLUTION parameters variable size
According to specifications, puzzle and solution parameters carry Random #I and
#J fields that has variable length depending of the Hash function. The fields
are recognized with a fixed value of 8 bytes.
The #I and #J fields should be determined depending of the TLV size.
See http://tools.ietf.org/html/draft-ietf-hip-rfc5201-bis-08#section-5.2.5 .
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