1 files changed, 58 insertions, 0 deletions
diff --git a/src/feature/dirclient/dlstatus.h b/src/feature/dirclient/dlstatus.h
new file mode 100644
index 0000000000..99e0d0225b
--- /dev/null
+++ b/src/feature/dirclient/dlstatus.h
@@ -0,0 +1,58 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2019, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file dlstatus.h
+ * \brief Header file for dlstatus.c.
+ **/
+
+#ifndef TOR_DLSTATUS_H
+#define TOR_DLSTATUS_H
+
+time_t download_status_increment_failure(download_status_t *dls,
+                                         int status_code, const char *item,
+                                         int server, time_t now);
+time_t download_status_increment_attempt(download_status_t *dls,
+                                         const char *item,  time_t now);
+/** Increment the failure count of the download_status_t <b>dls</b>, with
+ * the optional status code <b>sc</b>. */
+#define download_status_failed(dls, sc)                                 \
+  download_status_increment_failure((dls), (sc), NULL,                  \
+                                    dir_server_mode(get_options()), \
+                                    time(NULL))
+
+void download_status_reset(download_status_t *dls);
+int download_status_is_ready(download_status_t *dls, time_t now);
+time_t download_status_get_next_attempt_at(const download_status_t *dls);
+void download_status_mark_impossible(download_status_t *dl);
+
+int download_status_get_n_failures(const download_status_t *dls);
+int download_status_get_n_attempts(const download_status_t *dls);
+
+#ifdef DLSTATUS_PRIVATE
+STATIC int download_status_schedule_get_delay(download_status_t *dls,
+                                              int min_delay,
+                                              time_t now);
+
+STATIC int find_dl_min_delay(const download_status_t *dls,
+                             const or_options_t *options);
+
+STATIC int next_random_exponential_delay(int delay,
+                                         int base_delay);
+
+STATIC void next_random_exponential_delay_range(int *low_bound_out,
+                                                int *high_bound_out,
+                                                int delay,
+                                                int base_delay);
+
+/* no more than quadruple the previous delay (multiplier + 1) */
+#define DIR_DEFAULT_RANDOM_MULTIPLIER (3)
+/* no more than triple the previous delay */
+#define DIR_TEST_NET_RANDOM_MULTIPLIER (2)
+
+#endif
+
+#endif /* !defined(TOR_DLSTATUS_H) */