nat: Remember if we have check the imsi.
Return -1 if the IMSI should be filtered, 0 if the IMSI could not
be checked and 1 if the IMSI was checked and allowed to pass. In
the future this will be used to inspect every message coming by.
diff --git a/openbsc/src/nat/bsc_nat.c b/openbsc/src/nat/bsc_nat.c
index 1f45e45..31009bb 100644
--- a/openbsc/src/nat/bsc_nat.c
+++ b/openbsc/src/nat/bsc_nat.c
@@ -713,7 +713,7 @@
switch (parsed->sccp_type) {
case SCCP_MSG_TYPE_CR:
filter = bsc_nat_filter_sccp_cr(bsc, msg, parsed, &con_type);
- if (filter != 0)
+ if (filter < 0)
goto exit3;
if (!create_sccp_src_ref(bsc, parsed))
goto exit2;
@@ -721,6 +721,7 @@
con->msc_con = bsc->nat->msc_con;
con_msc = con->msc_con;
con->con_type = con_type;
+ con->imsi_checked = filter;
con_bsc = con->bsc;
break;
case SCCP_MSG_TYPE_RLSD: