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/include/openbsc/bsc_nat_sccp.h b/openbsc/include/openbsc/bsc_nat_sccp.h
index 4f1afcb..c4f756e 100644
--- a/openbsc/include/openbsc/bsc_nat_sccp.h
+++ b/openbsc/include/openbsc/bsc_nat_sccp.h
@@ -78,6 +78,7 @@
/* status */
int con_type;
int con_local;
+ int imsi_checked;
/*
* audio handling. Remember if we have ever send a CRCX,
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:
diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index 0582513..e81a1e8 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -271,7 +271,7 @@
/* 2. BSC allow */
if (lst_check_allow(bsc_lst, mi_string) == 0)
- return 0;
+ return 1;
}
/* 3. NAT deny */
@@ -283,7 +283,7 @@
}
}
- return 0;
+ return 1;
}
static int _cr_check_loc_upd(struct bsc_connection *bsc, uint8_t *data, unsigned int length)