1 files changed, 23 insertions, 0 deletions
diff --git a/src/or/router.c b/src/or/router.c
index fd0df52dce..8f56eddef3 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -2916,6 +2916,29 @@ node_describe(const node_t *node)
   return node_get_description(buf, node);
 }
 
+/** Return a human-readable description of the node whose identity is
+ * <b>identity_digest</b>. If node_get_by_id() returns NULL, base 16 encoding
+ * of <b>identity_digest</b> is returned instead.
+ *
+ * This function is not thread-safe.  Each call to this function invalidates
+ * previous values returned by this function.
+ */
+const char *
+node_describe_by_id(const char *identity_digest)
+{
+  static char buf[NODE_DESC_BUF_LEN];
+  const node_t *node = NULL;
+
+  node = node_get_by_id(identity_digest);
+  if (!node) {
+    buf[0] = '$';
+    base16_encode(buf+1, HEX_DIGEST_LEN+1, identity_digest, DIGEST_LEN);
+    return buf;
+  } else {
+    return node_get_description(buf, node);
+  }
+}
+
 /** Return a human-readable description of the routerstatus_t <b>rs</b>.
  *
  * This function is not thread-safe.  Each call to this function invalidates