commit 9b7cfb0adfde90834aaa4e962b9f7524f173beca
author Jacob Erlbeck <jerlbeck@sysmocom.de> Fri Sep 12 12:12:31 2014 +0200
committer Jacob Erlbeck <jerlbeck@sysmocom.de> Thu Sep 18 13:21:16 2014 +0200
tree 21752239150c5f163a7eee71cb6665c38cbc4e29
parent 550898afe03b3db93b6693fafe367cc0e0788c44

gbproxy: Send DETACH_ACC if the IMSI has not been acquired

If IMSI acquisition is enabled and the gbproxy receives a Detach
request from the MS, it cannot pass it to the SGSN since the
acquisition has not yet been completed.

This patch implements the generation of a Detach Accept message and
for this case and updates the TLLI state accordingly.

Sponsored-by: On-Waves ehf

openbsc/tests/gbproxy/gbproxy_test.ok

diff --git a/openbsc/tests/gbproxy/gbproxy_test.ok b/openbsc/tests/gbproxy/gbproxy_test.ok
index 0711292..5e7931c 100644
--- a/openbsc/tests/gbproxy/gbproxy_test.ok
+++ b/openbsc/tests/gbproxy/gbproxy_test.ok
@@ -3076,6 +3076,10 @@
 CALLBACK, event 0, msg length 44, bvci 0x1002
 00 00 10 02 01 80 00 de ad 00 00 04 08 88 11 22 33 40 50 60 12 34 00 80 0e 00 15 01 c0 1d 08 05 01 18 05 f4 ef e2 b7 00 19 03 b9 97 cb aa cc a3 
 
+NS UNITDATA MESSAGE to BSS, BVCI 0x1002, msg length 24 (gprs_ns_sendmsg)
+MESSAGE to BSS at 0x01020304:1111, msg length 28
+00 00 10 02 00 80 00 de ad 00 50 20 16 82 02 58 0e 00 09 41 c4 05 08 06 00 29 4a 68 
+
 result (DETACH REQ) = 0
 
 Peers:
@@ -3086,9 +3090,7 @@
     TLLI patched              (SGSN): 9
     P-TMSI patched            (SGSN): 1
     Attach Request count            : 3
-    TLLI cache size                 : 1
-    TLLI-Cache: 1
-      TLLI 8000dead -> 7eb52dfb, IMSI (none), AGE 0, STORED 2, IMSI acquisition in progress
+    TLLI-Cache: 0
 PROCESSING DETACH REQ (unknown TLLI) from 0x01020304:1111
 00 00 10 02 01 80 00 be ef 00 00 04 08 88 11 22 33 40 50 60 12 34 00 80 0e 00 15 01 c0 21 08 05 01 18 05 f4 ef e2 b7 00 19 03 b9 97 cb ca 4d 70 
 
@@ -3097,7 +3099,7 @@
 
 NS UNITDATA MESSAGE to BSS, BVCI 0x1002, msg length 24 (gprs_ns_sendmsg)
 MESSAGE to BSS at 0x01020304:1111, msg length 28
-00 00 10 02 00 80 00 be ef 00 50 20 16 82 02 58 0e 00 09 41 c4 01 08 15 01 b7 f8 36 
+00 00 10 02 00 80 00 be ef 00 50 20 16 82 02 58 0e 00 09 41 c4 01 08 06 00 11 f5 c0 
 
 result (DETACH REQ (unknown TLLI)) = 0
 
@@ -3109,10 +3111,7 @@
     TLLI patched              (SGSN): 9
     P-TMSI patched            (SGSN): 1
     Attach Request count            : 3
-    TLLI cache size                 : 2
-    TLLI-Cache: 2
-      TLLI 8000beef -> 7e23ef54, IMSI (none), AGE 0, STORED 1, IMSI acquisition in progress
-      TLLI 8000dead -> 7eb52dfb, IMSI (none), AGE 0, STORED 2, IMSI acquisition in progress
+    TLLI-Cache: 0
 Gbproxy global:
     Invalid Routing Area Identifier : 1
     BSSGP protocol error      (SGSN): 1