Note functions that store the RNG callback in a context
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 960200f..3cdddf7 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -2255,6 +2255,10 @@
/**
* \brief Set the random number generator callback
*
+ * \note The callback with its parameter must remain valid as
+ * long as there is an SSL context that uses the
+ * SSL configuration.
+ *
* \param conf SSL configuration
* \param f_rng RNG function (mandatory)
* \param p_rng RNG parameter