gbproxy: Copy uplink messages to SGSN 2
Some messages that are related to the BVC itself must be forwarded to
the secondary SGSN, too.
This patch implements this for BVC-RESET (BVCI != 0) and FLOW-CONTROL-BVC
messages. The resulting acknowledgement messages from the secondary
SGSN are silently dropped. The idea behind this is that the primary
SGSN is responsible for setting up and maintaining the BVC whereas
the secondary SGSN is rather passive and just has to accept it.
Ticket: OW#1258
Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/gbproxy/gbproxy_test.ok b/openbsc/tests/gbproxy/gbproxy_test.ok
index 90900eb..c554f42 100644
--- a/openbsc/tests/gbproxy/gbproxy_test.ok
+++ b/openbsc/tests/gbproxy/gbproxy_test.ok
@@ -3001,6 +3001,10 @@
CALLBACK, event 0, msg length 18, bvci 0x0000
00 00 00 00 22 04 82 10 02 07 81 08 08 88 11 22 33 40 50 60 10 00
+NS UNITDATA MESSAGE to SGSN 2, BVCI 0x0000, msg length 18 (gprs_ns_sendmsg)
+MESSAGE to SGSN 2 at 0x15161718:32001, msg length 22
+00 00 00 00 22 04 82 10 02 07 81 08 08 88 21 63 54 40 50 60 10 00
+
NS UNITDATA MESSAGE to SGSN, BVCI 0x0000, msg length 18 (gprs_ns_sendmsg)
MESSAGE to SGSN at 0x05060708:32000, msg length 22
00 00 00 00 22 04 82 10 02 07 81 08 08 88 21 63 54 40 50 60 10 00
@@ -3025,11 +3029,7 @@
CALLBACK, event 0, msg length 5, bvci 0x0000
00 00 00 00 23 04 82 10 02
-NS UNITDATA MESSAGE to BSS, BVCI 0x0000, msg length 5 (gprs_ns_sendmsg)
-MESSAGE to BSS at 0x01020304:1111, msg length 9
-00 00 00 00 23 04 82 10 02
-
-result (BVC_RESET_ACK) = 9
+result (BVC_RESET_ACK) = 1
Current NS-VCIs:
VCI 0x1001, NSEI 0x1000, peer 0x01020304:1111
@@ -3053,6 +3053,10 @@
CALLBACK, event 0, msg length 24, bvci 0x1002
00 00 10 02 26 1e 81 01 05 82 01 dc 03 82 02 76 01 82 00 50 1c 82 02 58 06 82 00 03
+NS UNITDATA MESSAGE to SGSN 2, BVCI 0x1002, msg length 24 (gprs_ns_sendmsg)
+MESSAGE to SGSN 2 at 0x15161718:32001, msg length 28
+00 00 10 02 26 1e 81 01 05 82 01 dc 03 82 02 76 01 82 00 50 1c 82 02 58 06 82 00 03
+
NS UNITDATA MESSAGE to SGSN, BVCI 0x1002, msg length 24 (gprs_ns_sendmsg)
MESSAGE to SGSN at 0x05060708:32000, msg length 28
00 00 10 02 26 1e 81 01 05 82 01 dc 03 82 02 76 01 82 00 50 1c 82 02 58 06 82 00 03
@@ -3077,11 +3081,7 @@
CALLBACK, event 0, msg length 4, bvci 0x1002
00 00 10 02 27 1e 81 01
-NS UNITDATA MESSAGE to BSS, BVCI 0x1002, msg length 4 (gprs_ns_sendmsg)
-MESSAGE to BSS at 0x01020304:1111, msg length 8
-00 00 10 02 27 1e 81 01
-
-result (FLOW_CONTROL_BVC_ACK) = 8
+result (FLOW_CONTROL_BVC_ACK) = 0
--- Establish GPRS connection (SGSN 1) ---