* @param l list
* @param buf payload buffer to find
* @param len length of the payload (number of bytes in buf)
+ *
+ * @return GNUNET_YES if found, GNUNET_NO otherwise
*/
int
GNUNET_CONTAINER_slist_contains (const struct GNUNET_CONTAINER_SList *l,
const void *buf, size_t len);
-
+/**
+ * Check if a list contains a certain element using 'compare' function
+ *
+ * @param l list
+ * @param buf payload buffer to find
+ * @param len length of the payload (number of bytes in buf)
+ * @param compare comparison function
+ *
+ * @return NULL if the 'buf' could not be found, pointer to the
+ * list element, if found
+ */
+void *
+GNUNET_CONTAINER_slist_contains2 (const struct GNUNET_CONTAINER_SList *l,
+ const void *buf, size_t len,
+ int (*compare)(const void *, const size_t, const void *, const size_t));
/**
* Count the elements of a list
* @param l list