[tmsi] Make the tmsi a 4 octet number
tmsi is four octets long, there is no need to make it a string
and then jump through hoops to convert it to a number. Keep the database
using it as a string to benefit from the NULL handling of the db.
Introduce the reserved tmsi which has all bits set to 1 according
to GSM 03.03 ยง2.4 and start checking for it and make sure the db
code will never allocate such a tmsi.
diff --git a/openbsc/tests/db/db_test.c b/openbsc/tests/db/db_test.c
index a248e60..f168acb 100644
--- a/openbsc/tests/db/db_test.c
+++ b/openbsc/tests/db/db_test.c
@@ -38,8 +38,8 @@
if (strcmp(original->imsi, copy->imsi) != 0) \
fprintf(stderr, "IMSIs do not match in %s:%d '%s' '%s'\n", \
__FUNCTION__, __LINE__, original->imsi, copy->imsi); \
- if (strcmp(original->tmsi, copy->tmsi) != 0) \
- fprintf(stderr, "TMSIs do not match in %s:%d '%s' '%s'\n", \
+ if (original->tmsi != copy->tmsi) \
+ fprintf(stderr, "TMSIs do not match in %s:%d '%u' '%u'\n", \
__FUNCTION__, __LINE__, original->tmsi, copy->tmsi); \
if (strcmp(original->name, copy->name) != 0) \
fprintf(stderr, "names do not match in %s:%d '%s' '%s'\n", \