Hello All,
Anyone know the tshark filter for gsm_map? The problem I met
is: I generated a SMS mt-forwardSM MAP request, however from the pcap file, the
“GSM SMS TPDU” part shows the type is “SMS-DELIVER REPORT”
instead of “SMS-DELIVER”.
I have checked “3GPP TS 23.040 V6.8.0 (2006-09)”
for realization of SMS, in the PDU type SMS-DELIVERY, the TP-MTI(TP-Message-Type-Indicator)
is:
bit1 bit0 Message type
0 0 SMS-DELIVER (in the direction SC to MS)
0 0 SMS-DELIVER REPORT (in the direction MS to SC)
Therefore SMS-DELIVERY and SMS-DELIVER REPORT have the same TP-MTI
but for different direction. Here the question is how tshark will know the direction?
If it can not know the direction, how does tshark to differentiate the 2 types of
TPDU?
My operation environment:
-
OS: solaris 9/freebsd 6.1,the results
are same on the 2 platform
-
Tshark version: 0.99.4
Part of the decoded trace:
GSM Mobile Application
Component: invoke (1)
invoke
invokeID: 1
opCode: localValue (0)
localValue: mt-forwardSM (44)
sm-RP-DA: imsi (0)
imsi: 1122334455667788
Imsi digits: 1122334455667788
sm-RP-OA: msisdn (2)
msisdn: 3938373731303135
0... .... = Extension: Extension
.011 .... = Nature of number: Network Specific Number (0x03)
.... 1001 = Number plan: Private Numbering (0x09)
ISDN Address digits: 83737313031353
sm-RP-UI: 240A9156792562404000000000000000000141
moreMessagesToSend
GSM SMS TPDU (GSM 03.40) SMS-DELIVER REPORT
.0.. .... :
TP-User-Data-Header-Indicator: The TP-UD field contains only the short message
.... .1.. :
TP-More-Messages-to-Send: No more messages are waiting for the MS in this SC
.... ..00 :
TP-Message-Type-Indicator
TP-Parameter-Indicator
0... .... :
No extension
.000 1... :
Reserved
.... .0.. :
TP-UDL not present
.... ..1. :
TP-DCS present
.... ...0 :
TP-PID not present
TP-Data-Coding-Scheme (145)
1001 .... :
Reserved coding groups
Thanks.
Joyce
