1 files changed, 41 insertions, 0 deletions
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index 2db72722d..6382248e4 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -5046,6 +5046,47 @@ hid_serv_get_responsible_directories(smartlist_t *responsible_dirs,
   return smartlist_len(responsible_dirs) ? 0 : -1;
 }
 
+int
+hid_serv_get_introduction_points(smartlist_t *introduction_points,
+                                 int number,
+                                 smartlist_t *excludedsmartlist,
+                                 const char *id)
+{
+  int start, found, i;
+
+  networkstatus_t *c = networkstatus_get_latest_consensus();
+  if (!c || !smartlist_len(c->routerstatus_list)) {
+    log_warn(LD_REND, "We don't have a consensus, so determine introduction "
+             "points");
+    return -1;
+  }
+  tor_assert(id);
+  start = networkstatus_vote_find_entry_idx(c, id, &found);
+  if (start == smartlist_len(c->routerstatus_list)) start = 0;
+  i = start;
+  do {
+    routerstatus_t *r = smartlist_get(c->routerstatus_list, i);
+
+    node_t *node = node_get_by_id(r->identity_digest);
+
+    if (!excludedsmartlist || !smartlist_contains(excludedsmartlist, node)) {
+      smartlist_add(introduction_points, node);
+      if (--number <= 0)
+        return 0;
+    } else {
+      log_warn(LD_REND, "Ignoring node %s ",
+                        safe_str_client(node_describe(node)));
+    }
+
+    if (++i == smartlist_len(c->routerstatus_list))
+      i = 0;
+  } while (i != start);
+
+  /* Even though we don't have the desired number of hidden service
+   * directories, be happy if we got any. */
+  return smartlist_len(introduction_points) ? 0 : -1;
+}
+
 /** Return true if this node is currently acting as hidden service
  * directory, false otherwise. */
 int