ussd: Keep track of used TIs for USSD and forward messages
Keep track of the used transaction identifier and always forward
messages to the USSD provider. E.g. this can be used to have a
dialogue going. Right now it is still possible that the MSC will
close down the connection.
diff --git a/openbsc/include/openbsc/bsc_nat_sccp.h b/openbsc/include/openbsc/bsc_nat_sccp.h
index a66732d..20db2c1 100644
--- a/openbsc/include/openbsc/bsc_nat_sccp.h
+++ b/openbsc/include/openbsc/bsc_nat_sccp.h
@@ -80,6 +80,9 @@
int imsi_checked;
char *imsi;
+ /* remember which Transactions we run over the bypass */
+ char ussd_ti[8];
+
/*
* audio handling. Remember if we have ever send a CRCX,
* remember the endpoint used by the MSC and BSC.