nat: Allow to have a regexp to match the MSISDN
The idea that MCC and MNC is enough to classify a subscriber
turns out to be wrong. Certain operatos license a number range
of IMSIs to others. When we see a '^' in the MCC field we treat
it as a regexp. The code now turns the MCC/MNC into a regexp
for the IMSI. It is not using extended POSIX regexp to match
the behavior of the access list.
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index 1645f70..32f4f72 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -854,7 +854,7 @@
entry.option = "^0([1-9])";
entry.text = "0049";
llist_add_tail(&entry.list, &entries.entry);
- nat->num_rewr = &entries;
+ bsc_nat_num_rewr_entry_adapt(nat, &entries);
/* verify that nothing changed */
msgb_reset(msg);
@@ -917,6 +917,7 @@
/* Make sure that a wildcard is matching */
entry.mnc = "*";
+ bsc_nat_num_rewr_entry_adapt(nat, &entries);
msg = msgb_alloc(4096, "test_dt_filter");
copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
parsed = bsc_nat_parse(msg);
@@ -951,6 +952,7 @@
/* Make sure that a wildcard is matching */
entry.mnc = "09";
+ bsc_nat_num_rewr_entry_adapt(nat, &entries);
msg = msgb_alloc(4096, "test_dt_filter");
copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
parsed = bsc_nat_parse(msg);