| Bug ID |
12555
|
| Summary |
Incorrect description of N/P-bit in NSSA LSA
|
| Product |
Wireshark
|
| Version |
2.1.x (Experimental)
|
| Hardware |
x86-64
|
| OS |
Debian
|
| Status |
UNCONFIRMED
|
| Severity |
Trivial
|
| Priority |
Low
|
| Component |
Dissection engine (libwireshark)
|
| Assignee |
[email protected]
|
| Reporter |
[email protected]
|
Created attachment 14676 [details]
NSSA LSA with P-bit set (NSSA LSA is translatable into AS-External LSA)
Build Information:
Wireshark 2.1.1-265-g71a57dc (Git Rev Unknown from unknown)
Copyright 1998-2016 Gerald Combs <[email protected]> and contributors.
License GPLv2+: GNU GPL version 2 or later
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiled (64-bit) with GTK+ 3.20.6, with Cairo 1.14.6, with Pango 1.40.1, with
libpcap, without POSIX capabilities, without libnl, with GLib 2.48.1, with zlib
1.2.8, with SMI 0.4.8, without c-ares, without Lua, without GnuTLS, without
Gcrypt, without Kerberos, without GeoIP, with PortAudio V19-devel (built Feb 15
2014 23:28:00), without AirPcap.
Running on Linux 4.6.0-1-amd64, with locale ru_RU.UTF-8, with libpcap version
1.7.4, with zlib 1.2.8.
Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz (with SSE4.2)
Built using gcc 5.4.0 20160609.
--
Wireshark displays description of N/P-bit in Hello, DBD and LSA Type 7 as
"NSSA: (Not) Supported". While it is correct for Hello and DBD packets, it is
not correct for NSSA LSA. In Hello and DBD packets this bit is considered as
N-bit which communicates to neighbors whether NSSA is supported. In NSSA LSAs
(LSA Type 7) it is considered as P-bit and tells whether NSSA LSA (LSA Type 7)
is translatable into AS-External LSA (LSA Type 5).
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