From bbcf406d9fe0c5a51f76e0adb37bf854091246c5 Mon Sep 17 00:00:00 2001
From: Roger Dingledine <arma@torproject.org>
Date: Wed, 6 Feb 2008 12:45:04 +0000
Subject: [PATCH] If the networkstatus consensus lists no recommended versions,
 don't complain to the user and demand that they upgrade to one of "".

svn:r13401
---
 src/or/control.c       |  1 +
 src/or/networkstatus.c |  3 +++
 src/or/or.h            |  1 +
 src/or/routerparse.c   | 10 ++++++++--
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/or/control.c b/src/or/control.c
index a8f10aa488..ff3a4b10ae 100644
--- a/src/or/control.c
+++ b/src/or/control.c
@@ -1706,6 +1706,7 @@ getinfo_helper_events(control_connection_t *control_conn,
           case VS_NEW: *answer = tor_strdup("new"); break;
           case VS_NEW_IN_SERIES: *answer = tor_strdup("new in series"); break;
           case VS_UNRECOMMENDED: *answer = tor_strdup("unrecommended"); break;
+          case VS_EMPTY: *answer = tor_strdup("none recommended"); break;
           case VS_UNKNOWN: *answer = tor_strdup("unknown"); break;
           default: tor_fragile_assert();
           }
diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c
index 4eda1b4e0e..d1069940ca 100644
--- a/src/or/networkstatus.c
+++ b/src/or/networkstatus.c
@@ -1577,6 +1577,9 @@ routers_update_all_from_networkstatus(time_t now, int dir_version)
 
     if (status == VS_RECOMMENDED) {
       log_info(LD_GENERAL, "The directory authorities say my version is ok.");
+    } else if (status == VS_EMPTY) {
+      log_info(LD_GENERAL,
+               "The directory authorities don't recommend any versions.");
     } else if (status == VS_NEW || status == VS_NEW_IN_SERIES) {
       if (!have_warned_about_new_version) {
         log_notice(LD_GENERAL, "This version of Tor (%s) is newer than any "
diff --git a/src/or/or.h b/src/or/or.h
index 2c2cce34f7..9ec57784fd 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -3317,6 +3317,7 @@ typedef enum version_status_t {
                        * in its series, but later recommended versions exist.
                        */
   VS_UNRECOMMENDED=4, /**< This version is not recommended (general case). */
+  VS_EMPTY=5, /**< The version list was empty; no agreed-on versions. */
   VS_UNKNOWN, /**< We have no idea. */
 } version_status_t;
 
diff --git a/src/or/routerparse.c b/src/or/routerparse.c
index 1c21715d62..c4ebe857ff 100644
--- a/src/or/routerparse.c
+++ b/src/or/routerparse.c
@@ -280,7 +280,7 @@ static token_rule_t dir_footer_token_table[] = {
   END_OF_TABLE
 };
 
-/** List of tokens allowable in v1 diectory headers/footers. */
+/** List of tokens allowable in v1 directory headers/footers. */
 static token_rule_t dir_token_table[] = {
   /* don't enforce counts; this is obsolete. */
   T( "network-status",      K_NETWORK_STATUS,      NO_ARGS, NO_OBJ ),
@@ -538,7 +538,8 @@ router_append_dirobj_signature(char *buf, size_t buf_len, const char *digest,
 }
 
 /** Return VS_RECOMMENDED if <b>myversion</b> is contained in
- * <b>versionlist</b>.  Else, return VS_OLD if every member of
+ * <b>versionlist</b>.  Else, return VS_EMPTY if versionlist has no
+ * entries. Else, return VS_OLD if every member of
  * <b>versionlist</b> is newer than <b>myversion</b>.  Else, return
  * VS_NEW_IN_SERIES if there is at least one member of <b>versionlist</b> in
  * the same series (major.minor.micro) as <b>myversion</b>, but no such member
@@ -569,6 +570,11 @@ tor_version_is_obsolete(const char *myversion, const char *versionlist)
   version_sl = smartlist_create();
   smartlist_split_string(version_sl, versionlist, ",", SPLIT_SKIP_SPACE, 0);
 
+  if (!strlen(versionlist)) { /* no authorities cared or agreed */
+    ret = VS_EMPTY;
+    goto done;
+  }
+
   SMARTLIST_FOREACH(version_sl, const char *, cp, {
     if (!strcmpstart(cp, "Tor "))
       cp += 4;
-- 
2.11.4.GIT