Let resolve conns retry/expire also, rather than sticking around forever.

Put the check-if-requested-exitrouter-will-reject-us code in the
circuit_attach loop, so it gets checked periodically and not just
once at the beginning. This is useful in case the routerlist changes,
but also in case the address gets resolved into something that we learn
we'll reject.


svn:r3039

src/or/circuituse.c

@@ -794,6 +794,20 @@ int connection_ap_handshake_attach_circuit(connection_t *conn) {
   if (!connection_edge_is_rendezvous_stream(conn)) { /* we're a general conn */
     circuit_t *circ=NULL;
 
+    if (conn->chosen_exit_name) {
+      routerinfo_t *router = router_get_by_nickname(conn->chosen_exit_name);
+      if(!router) {
+        log_fn(LOG_WARN,"Requested exit point '%s' is not known. Closing.",
+               conn->chosen_exit_name);
+        return -1;
+      }
+      if (!connection_ap_can_use_exit(conn, router)) {
+        log_fn(LOG_WARN, "Requested exit point '%s' would refuse request. Closing.",
+               conn->chosen_exit_name);
+        return -1;
+      }
+    }
+
     /* find the circuit that we should use, if there is one. */
     retval = circuit_get_open_circ_or_launch(conn, CIRCUIT_PURPOSE_C_GENERAL, &circ);
     if (retval < 1)

src/or/connection_edge.c

@@ -233,8 +233,8 @@ int connection_edge_finished_connecting(connection_t *conn)
  */
 #define MAX_STREAM_RETRIES 4
 
-/** Find all general-purpose AP streams in state connect_wait that sent
- * their begin cell >=15 seconds ago. Detach from their current circuit,
+/** Find all general-purpose AP streams waiting for a response that sent
+ * their begin/resolve cell >=15 seconds ago. Detach from their current circuit,
  * and mark their current circuit as unsuitable for new streams. Then call
  * connection_ap_handshake_attach_circuit() to attach to a new circuit (if
  * available) or launch a new one.
@@ -254,7 +254,9 @@ void connection_ap_expire_beginning(void) {
 
   for (i = 0; i < n; ++i) {
     conn = carray[i];
-    if (conn->type != CONN_TYPE_AP ||
+    if (conn->type != CONN_TYPE_AP)
+      continue;
+    if (conn->state != AP_CONN_STATE_RESOLVE_WAIT &&
         conn->state != AP_CONN_STATE_CONNECT_WAIT)
       continue;
     if (now - conn->timestamp_lastread < 15)
@@ -262,7 +264,7 @@ void connection_ap_expire_beginning(void) {
     conn->num_retries++;
     circ = circuit_get_by_conn(conn);
     if (!circ) { /* it's vanished? */
-      log_fn(LOG_INFO,"Conn is in connect-wait, but lost its circ.");
+      log_fn(LOG_INFO,"Conn is waiting, but lost its circ.");
       connection_mark_for_close(conn);
       continue;
     }
@@ -278,12 +280,12 @@ void connection_ap_expire_beginning(void) {
     tor_assert(circ->purpose == CIRCUIT_PURPOSE_C_GENERAL);
     if (conn->num_retries >= MAX_STREAM_RETRIES) {
       log_fn(LOG_WARN,"Stream is %d seconds late. Giving up.",
-             15*conn->num_retries);
+             15*conn->num_retries); /* XXX this number is not accurate */
       circuit_log_path(LOG_WARN, circ);
       connection_edge_end(conn, END_STREAM_REASON_TIMEOUT, conn->cpath_layer);
       connection_mark_for_close(conn);
     } else {
-      log_fn(LOG_WARN,"Stream is %d seconds late. Retrying.",
+      log_fn(LOG_NOTICE,"Stream is %d seconds late. Retrying.",
              (int)(now - conn->timestamp_lastread));
       circuit_log_path(LOG_WARN, circ);
       /* send an end down the circuit */
@@ -354,7 +356,6 @@ static int connection_ap_handshake_process_socks(connection_t *conn) {
   socks_request_t *socks;
   int sockshere;
   hostname_type_t addresstype;
-  routerinfo_t *router;
 
   tor_assert(conn);
   tor_assert(conn->type == CONN_TYPE_AP);
@@ -414,17 +415,6 @@ static int connection_ap_handshake_process_socks(connection_t *conn) {
     }
     conn->chosen_exit_name = tor_strdup(s+1);
     *s = 0;
-    router = router_get_by_nickname(conn->chosen_exit_name);
-    if(!router) {
-      log_fn(LOG_WARN,"Requested exit point '%s' is not known. Closing.",
-             conn->chosen_exit_name);
-      return -1;
-    }
-    if (!connection_ap_can_use_exit(conn, router)) {
-      log_fn(LOG_WARN, "Requested exit point '%s' would refuse request. Closing.",
-             conn->chosen_exit_name);
-      return -1;
-    }
   }
 
   if (addresstype != ONION_HOSTNAME) {

src/or/main.c

@@ -565,7 +565,7 @@ static void run_scheduled_events(time_t now) {
     }
     last_rotated_certificate = now;
     /* XXXX We should rotate TLS connections as well; this code doesn't change
-     * XXXX them at all. */
+     *      them at all. */
   }
 
   /** 1c. If we have to change the accounting interval or record