r22014: Make us pass RANDOMIPC test again :-(. This is an ugly check-in,

but I've no option.
Jeremy.
(This used to be commit c3a565081d70b209a4f9e6e8f1859bf7194a5f74)

1 files changed, 23 insertions, 0 deletions

diff --git a/source3/lib/util.c b/source3/lib/util.c
index cf8d49c502..809071662d 100644
--- a/source3/lib/util.c
+++ b/source3/lib/util.c
@@ -3124,3 +3124,26 @@ int this_is_smp(void)
 	return 0;
 #endif
 }
+
+/****************************************************************
+ Return a safe offset into a buffer, or NULL.
+****************************************************************/
+
+char *get_safe_offset(const char *buf_base, size_t buf_len, char *ptr, size_t off)
+{
+	const char *end_base = buf_base + buf_len;
+	const char *end_ptr = ptr + off;
+
+	if (!buf_base || !ptr) {
+		return NULL;
+	}
+
+	if (end_base < buf_base || end_ptr < ptr) {
+		return NULL; /* wrap. */
+	}
+
+	if (end_ptr < end_base) {
+		return ptr;
+	}
+	return NULL;
+}