SGSN: use unique AUTH REQ reference
The A&C reference number specified in 3GPP TS 24.008 ยง 10.5.5.19
identifies particular request sent by network with the related response
sent by MS. The value transparently copied from request to response by
MS: the spec do not specify what exactly should be in there so we use
rand() to decrease chance for collisions.
Note: variable named 'rand' clashes with standard function rand() so it
was renamed.
Change-Id: I3638821a9b4a0532b28dbbb50faa30c4082579f6
Related: OS#1582
diff --git a/openbsc/tests/sgsn/sgsn_test.c b/openbsc/tests/sgsn/sgsn_test.c
index d568807..e8e05f6 100644
--- a/openbsc/tests/sgsn/sgsn_test.c
+++ b/openbsc/tests/sgsn/sgsn_test.c
@@ -101,6 +101,25 @@
return 0;
}
+/* override, requires '-Wl,--wrap=RAND_bytes' */
+int __real_RAND_bytes(unsigned char *buf, int num);
+int mock_RAND_bytes(unsigned char *buf, int num);
+int (*RAND_bytes_cb)(unsigned char *, int) =
+ &mock_RAND_bytes;
+
+int __wrap_RAND_bytes(unsigned char *buf, int num)
+{
+ return (*RAND_bytes_cb)(buf, num);
+}
+/* make results of A&C ref predictable */
+int mock_RAND_bytes(unsigned char *buf, int num)
+{
+ if (num > 1)
+ return __real_RAND_bytes(buf, num);
+ buf[0] = 0;
+ return 1;
+}
+
/* override, requires '-Wl,--wrap=sgsn_update_subscriber_data' */
void __real_sgsn_update_subscriber_data(struct sgsn_mm_ctx *);
void (*update_subscriber_data_cb)(struct sgsn_mm_ctx *) =