RFC Errata
RFC 4302, "IP Authentication Header", December 2005
Source of RFC: ipsec (sec)
Errata ID: 1644
Status: Held for Document Update
Type: Editorial
Publication Format(s) : TEXT
Reported By: Nikolai Malykh
Date Reported: 2008-12-25
Held for Document Update by: Pasi Eronen
Section B2 says:
Appendix B2 says: + Case A: Tl >= (W - 1). In this case, the window is within one sequence number subspace. (See Figure 1) + Case B: Tl < (W - 1). In this case, the window spans two sequence number subspaces. (See Figure 2) In the figures below, the bottom line ("----") shows two consecutive sequence number subspaces, with zeros indicating the beginning of each subspace. The two shorter lines above it show the higher-order bits that apply. The "====" represents the window. The "****" represents future sequence numbers, i.e., those beyond the current highest sequence number authenticated (ThTl). Th+1 ********* Th =======***** --0--------+-----+-----0--------+-----------0-- Bl Tl Bl (Bl+2^32) mod 2^32 Figure 1 -- Case A Th ====************** Th-1 === --0-----------------+--0--+--------------+--0-- Bl Tl Bl (Bl+2^32) mod 2^32 Figure 2 -- Case B
It should say:
Must say: + Case A: Tl >= (W - 1). In this case, the window is within one sequence number subspace. (See Figure 2) + Case B: Tl < (W - 1). In this case, the window spans two sequence number subspaces. (See Figure 3) In the figures below, the bottom line ("----") shows two consecutive sequence number subspaces, with zeros indicating the beginning of each subspace. The two shorter lines above it show the higher-order bits that apply. The "====" represents the window. The "****" represents future sequence numbers, i.e., those beyond the current highest sequence number authenticated (ThTl). Th+1 ********* Th =======***** --0--------+-----+-----0--------+-----------0-- Bl Tl Bl (Bl+2^32) mod 2^32 Figure 2 -- Case A Th ====************** Th-1 === --0-----------------+--0--+--------------+--0-- Bl Tl Bl (Bl+2^32) mod 2^32 Figure 3 -- Case B
Notes:
Wrong numbers for figures in Section B2.