From 33762b529694f58d7640ebcbef1bc0f940419c89 Mon Sep 17 00:00:00 2001
From: Jacob Appelbaum <jacob@appelbaum.net>
Date: Sat, 8 Aug 2009 19:15:22 -0700
Subject: [PATCH] LetsKillNoConnect removes support for .noconnect This is a
 patch to remove support for .noconnect. We are removing .noconnect because of
 a talk at Defcon 17 by Gregory Fleischer.

---
 ChangeLog                 |  1 +
 doc/spec/address-spec.txt | 12 ------------
 src/or/connection_edge.c  | 16 ----------------
 src/or/dnsserv.c          |  7 +------
 4 files changed, 2 insertions(+), 34 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 1d9b71b766..b1f45f1ffd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -49,6 +49,7 @@ Changes in version 0.2.2.1-alpha - 2009-0?-??
     - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
       always on; using them is necessary for correct forward-compatible
       controllers.
+    - Removal of support for .noconnect style addresses.
 
 
 Changes in version 0.2.1.20 - 2009-??-??
diff --git a/doc/spec/address-spec.txt b/doc/spec/address-spec.txt
index 95641b49b8..fdae9b82a4 100644
--- a/doc/spec/address-spec.txt
+++ b/doc/spec/address-spec.txt
@@ -53,15 +53,3 @@
   When Tor sees an address in this format, it tries to look up and connect to
   the specified hidden service.  See rend-spec.txt for full details.
 
-4. .noconnect
-
-  SYNTAX:  [string].noconnect
-
-  When Tor sees an address in this format, it immediately closes the
-  connection without attaching it to any circuit.  This is useful for
-  controllers that want to test whether a given application is indeed using
-  the same instance of Tor that they're controlling.
-
-5. [XXX Is there a ".virtual" address that we expose too, or is that
-just intended to be internal? -RD]
-
diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c
index 79496f7a9b..04fffd9f57 100644
--- a/src/or/connection_edge.c
+++ b/src/or/connection_edge.c
@@ -1875,14 +1875,6 @@ connection_ap_handshake_process_socks(edge_connection_t *conn)
     return -1;
   } /* else socks handshake is done, continue processing */
 
-  if (hostname_is_noconnect_address(socks->address))
-  {
-    control_event_stream_status(conn, STREAM_EVENT_NEW, 0);
-    control_event_stream_status(conn, STREAM_EVENT_CLOSED, 0);
-    connection_mark_unattached_ap(conn, END_STREAM_REASON_DONE);
-    return -1;
-  }
-
   if (SOCKS_COMMAND_IS_CONNECT(socks->command))
     control_event_stream_status(conn, STREAM_EVENT_NEW, 0);
   else
@@ -2944,11 +2936,3 @@ failed:
     return BAD_HOSTNAME;
 }
 
-/** Check if the address is of the form "y.noconnect"
- */
-int
-hostname_is_noconnect_address(const char *address)
-{
-  return ! strcasecmpend(address, ".noconnect");
-}
-
diff --git a/src/or/dnsserv.c b/src/or/dnsserv.c
index 08cf653093..b1e0ff104f 100644
--- a/src/or/dnsserv.c
+++ b/src/or/dnsserv.c
@@ -92,12 +92,7 @@ evdns_server_callback(struct evdns_server_request *req, void *_data)
     evdns_server_request_respond(req, DNS_ERR_NONE);
     return;
   }
-  if (q->type == EVDNS_TYPE_A) {
-    /* Refuse any attempt to resolve a noconnect address, right now. */
-    if (hostname_is_noconnect_address(q->name)) {
-      err = DNS_ERR_REFUSED;
-    }
-  } else {
+  if (q->type != EVDNS_TYPE_A) {
     tor_assert(q->type == EVDNS_TYPE_PTR);
   }