From c3aac3ff6bb5d3a2bcacd82f27d6dfaf55cc1bef Mon Sep 17 00:00:00 2001
From: Roger Dingledine <arma@torproject.org>
Date: Wed, 5 Oct 2005 22:31:21 +0000
Subject: [PATCH] infrastructure for the 'change pseudonym' button. not used
 yet.

svn:r5199
---
 src/or/circuitlist.c | 21 +++++++++++++++++++++
 src/or/or.h          |  1 +
 2 files changed, 22 insertions(+)

diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c
index 51dc4c7140..7e50762963 100644
--- a/src/or/circuitlist.c
+++ b/src/or/circuitlist.c
@@ -567,6 +567,27 @@ circuit_mark_all_unused_circs(void)
   }
 }
 
+/** Go through the circuitlist; for each circuit that starts at us
+ * and is dirty, frob its timestamp_dirty so we won't use it for any
+ * new streams.
+ *
+ * This is useful for letting the user change pseudonyms, so new
+ * streams will not be linkable to old streams.
+ */
+void
+circuit_expire_all_dirty_circs(void)
+{
+  circuit_t *circ;
+  or_options_t *options = get_options();
+
+  for (circ=global_circuitlist; circ; circ = circ->next) {
+    if (CIRCUIT_IS_ORIGIN(circ) &&
+        !circ->marked_for_close &&
+        circ->timestamp_dirty)
+      circ->timestamp_dirty -= options->MaxCircuitDirtiness;
+  }
+}
+
 /** Mark <b>circ</b> to be closed next time we call
  * circuit_close_all_marked(). Do any cleanup needed:
  *   - If state is onionskin_pending, remove circ from the onion_pending
diff --git a/src/or/or.h b/src/or/or.h
index 5802c560eb..e13db66c96 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -1417,6 +1417,7 @@ circuit_t *circuit_get_rendezvous(const char *cookie);
 circuit_t *circuit_get_clean_open(uint8_t purpose, int need_uptime,
                                   int need_capacity, int internal);
 void circuit_mark_all_unused_circs(void);
+void circuit_expire_all_dirty_circs(void);
 void _circuit_mark_for_close(circuit_t *circ, int line, const char *file);
 
 #define circuit_mark_for_close(c) \