Cellular Network Infrastructure » Core Network (CN) » OsmoDia2GSUP

Current version 0.1.3 of osmo_diameter2gsup is missing commit 7c912ff07b6fe3c91b90d0b9729bdc159da6165d which handles decoding of the APN value. If you download the tar.xz there is no src/decode_apn.erl file:

https://obs.osmocom.org/source/osmocom:latest/osmo_dia2gsup/osmo-diameter2gsup_0.1.3.tar.xz?rev=c25caecb837ba4132713daf783df7793

The logs show that the APN is not decoded (Line breaks for emphasis):

Oct 30 14:31:27 sysmonitb osmo-dia2gsup[672]: 14:31:27.951 [info] GsupRxIsdReq: #{cn_domain => 1,imsi => <<"999700000070664">>,message_type => insert_sub_data_req,msisdn => <<3,7,102,244>>,pdp_info_list => [

#{access_point_name => <<7,100,101,102,97,117,108,116>>,pdp_context_id => 1},

#{access_point_name => <<"\binternet">>,pdp_context_id => 2},#{access_point_name => <<1,42>>,pdp_context_id => 3}]}
[...]
Oct 30 14:31:27 sysmonitb osmo-dia2gsup[672]: 14:31:27.958 [info] ULR Resp: {'ULA',"mme.localdomain;1698675596;2;app_s6a",1,"hss.localdomain","localdomain",[],2001,[],[],0,{'Subscription-Data',0,<<3,7,102,244>>,[],[],[],0,[],[],[],[],[],[],[],[],[],{'AMBR',100000000,100000000,[]},{'APN-Configuration-Profile',1,0,[{'APN-Configuration',1,0,"internet",[],{'EPS-Subscribed-QoS-Profile',9,{'Allocation-Retention-Priority',8,1,1},[]},[],[],[],[],[],{'AMBR',100000000,100000000,[]},[],[],[],[],[],[]},{'APN-Configuration',2,0,"internet",[],{'EPS-Subscribed-QoS-Profile',9,{'Allocation-Retention-Priority',8,1,1},[]},[],[],[],[],[],{'AMBR',100000000,100000000,[]},[],[],[],[],[],[]},{'APN-Configuration',3,0,"internet",[],{'EPS-Subscribed-QoS-Profile',9,{'Allocation-Retention-Priority',8,1,1},[]},[],[],[],[],[],{'AMBR',100000000,100000000,[]},[],[],[],[],[],[]}],[]},[],[],{'GPRS-Subscription-Data',0,[

{'PDP-Context',1,<<0,0,0,33>>,<<0,0,0,0,0,0,0,0,0,0,0,0,0,0>>,<<7,100,101,102,97,117,108,116>>,[],[],[],[],[],[],[],[],[],[],[]},

{'PDP-Context',2,<<0,0,0,33>>,<<0,0,0,0,0,0,0,0,0,0,0,0,0,0>>,<<"\binternet">>,[],[],[],[],[],[],[],[],[],[],[]},{'PDP-Context',3,<<0,0,0,33>>,<<0,0,0,0,0,0,0,0,0,0,0,0,0,0>>,<<1,42>>,[],[],[],[],[],[],[],[],[],[],[]}],[]},[],[],[],[],[],[],[],[],[],[]},[],[],[],[],[]}

GSUP returns APN "\x07default"
#{access_point_name => <<7,100,101,102,97,117,108,116>>,pdp_context_id => 1}
this is not decoded when passed to diameter
{'PDP-Context',1,<<0,0,0,33>>,<<0,0,0,0,0,0,0,0,0,0,0,0,0,0>>,<<7,100,101,102,97,117,108,116>>

Latest version tag I can find in the repository is 0.1.2.

Ping lynxis, pespin