https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13721
Bug ID: 13721
Summary: x2ap dissector dissects eUTRANcellIdentifier wrongly
as 8 hex number (32 bit)
Product: Wireshark
Version: 2.3.x (Experimental)
Hardware: x86
OS: Windows 7
Status: UNCONFIRMED
Severity: Major
Priority: Low
Component: Dissection engine (libwireshark)
Assignee: bugzilla-ad...@wireshark.org
Reporter: xiaoc...@foxmail.com
Target Milestone: ---
Created attachment 15559
--> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=15559&action=edit
x2ap
Build Information:
Paste the COMPLETE build information from "Help->About Wireshark", "wireshark
-v", or "tshark -v".
--
x2ap dissector dissects eUTRANcellIdentifier wrongly as 8 hex number (32
bit). The eUTRANcellIdentifier field is 28 bit, so 7 hex number. The binary and
decimal value are correct. I attached one pcap file which has the
eUTRANcellIdentifier field.
I found the is comprised of eNB ID (20 bit) and Cell ID (8 bit). Could we
dissect eNB ID and Cell ID further although they are not standard x2ap field?
0002e000 = 188416
0002e00 = 11776 (aligned with decimal part)
pLMN-Identity: 64f033
Mobile Country Code (MCC): China
(460)
Mobile Network Code (MNC): Unknown
(33)
eUTRANcellIdentifier: 0002e000 [bit
length 28, 4 LSB pad bits, 0000 0000 0000 0010 1110 0000 0000 .... decimal
value 11776]
http://www.sharetechnote.com/html/Handbook_LTE_IDs_in_LTE.html
##################################
ECI
E-UTRAN Cell Identifier
To identify a Cell within a PLMN
ECI (28 Bits) = eNB ID + Cell ID
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