Mobile Application Part (MAP) (GSM MAP)
Transfers between entities of a Public Land Mobile Network (PLMN) information specific to the PLMN in order to deal with the specific behaviour of roaming Mobile Stations (MS)s.
History
XXX - add a brief description of PROTO history
Protocol dependencies
TCAP: Typically, GSM MAP uses TCAP as its transport protocol. The Subsystem number (ssn) is used to identify GSM MAP
Example traffic
No. Time Source Destination Protocol Info 1 0.000000 1041 8744 GSM MAP invoke processUnstructuredSS-Request map-open destinationReference: 9656051124006913F6 1... .... = Extension: No Extension .001 .... = Nature of number: International Number (0x01) .... 0110 = Number plan: Land Mobile Numbering (ITU-T Rec. E.212) (0x06) Address digits: 655011420096316 GSM Mobile Application Component: invoke (1) invoke invokeID: 1 opCode: localValue (0) localValue: processUnstructuredSS-Request (59) Data coding: 0x0f SMPP Data Coding Scheme: Unknown (0x0f) GSM SMS Data Coding 0000 .... = DCS Coding Group for SMS: SMS DCS: General Data Coding indication - Uncompressed text, no message class (0x00) ..0. .... = DCS Text compression: Uncompressed text ...0 .... = DCS Class present: No message class .... 11.. = DCS Character set: Reserved (0x03) GSM CBS Data Coding 0000 .... = DCS Coding Group for CBS: CBS DCS: Language using the GSM 7-bit default alphabet (0x00) ..00 1111 = DCS CBS Message language: Language not specified (0x0f) USSD String: *140*0761241377# msisdn: 917267415827F2 1... .... = Extension: No Extension .001 .... = Nature of number: International Number (0x01) .... 0001 = Number plan: ISDN/Telephony Numbering (Rec ITU-T E.164) (0x01) ISDN Address digits: 27761485722
Wireshark
The GSM MAP dissector is fully functional.
Preference Settings
The only preference is "TCAP SSNs" which is a range of SSNs on which gsm_map dissector is triggered.
Example capture file
Display Filter
A complete list of GSM MAP display filter fields can be found in the display filter reference
Show only the GSM MAP based traffic:
gsm_map
Capture Filter
External links
3GPP TS 29.002 Mobile Application Part (MAP) specification