Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 12555] New: Incorrect description of N/P-bit in NSSA LSA

[bugzilla-daemon@xxxxxxxxxxxxx]

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	bugzilla-admin@wireshark.org
Reporter	alexander.okonnikov@gmail.com

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 <gerald@wireshark.org> 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).

---

      You are receiving this mail because:

• You are watching all bug changes.