Wireshark-bugs: [Wireshark-bugs] [Bug 7932] Display Filter for GSM DTAP APN
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 30 Oct 2012 01:24:51 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7932

--- Comment #5 from Pascal Quantin <pascal.quantin@xxxxxxxxx> 2012-10-30 01:24:51 PDT ---
(In reply to comment #4)
> Agreed on having a generic APN to string function. Will try it.
> 
> With regards to label being upto 63 characters long, I am a bit confused. As
> per 3GPP maximum length of APN is 100 octets. (#define MAX_APN_LENGTH          
>      100 in packet-gsm_a_gm.c) .APN network identifier does follow RFC 1035 as
> you mentioned. May be issue was unreported till now  since nobody uses APN's of
> above 20 character length :). Will try to simulate it.

An APN name is composed of several labels separated by dots. So there is no
contradiction here: 100 is the global maximum size while 63 is the maximum size
for one label.

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