changing type
[oweals/gnunet.git] / src / transport / plugin_transport_http_client.c
index a0a3f208778750d24f97bdbcf744502950f40186..212fb1b59ff2dcac0cc396364ff035963460b80d 100644 (file)
@@ -97,7 +97,6 @@ struct HTTP_Message
   void *transmit_cont_cls;
 };
 
-
 /**
  * Session handle for connections.
  */
@@ -145,25 +144,35 @@ struct Session
   struct HTTP_Client_Plugin *plugin;
 
   /**
-   * Is client send handle paused since there are no data to send?
-   * GNUNET_YES/NO
+   * Was session given to transport service?
    */
 int client_put_paused;
// int session_passed;
 
   /**
-   * Is client send handle to be disconnected due to inactivity
+   * Client send handle
    */
-  int client_put_disconnect;
+  void *client_put;
+
 
   /**
-   * Was session given to transport service?
+   * Is the client PUT handle currently paused
    */
// int session_passed;
 int put_paused;
 
   /**
-   * Client send handle
+   * Is the client PUT handle disconnect in progress?
    */
-  void *client_put;
+  int put_tmp_disconnecting;
+
+  /**
+   * Is the client PUT handle temporarily disconnected?
+   */
+  int put_tmp_disconnected;
+
+  /**
+   * We received data to send while disconnecting, reconnect immediately
+   */
+  int put_reconnect_required;
 
   /**
    * Client receive handle
@@ -406,7 +415,7 @@ client_log (CURL * curl, curl_infotype type, char *data, size_t size, void *cls)
  * a fresh connection to another peer.
  *
  * @param cls closure
- * @param session which session must be used
+ * @param s which session must be used
  * @param msgbuf the message to transmit
  * @param msgbuf_size number of bytes in 'msgbuf'
  * @param priority how important is the message (most plugins will
@@ -426,7 +435,7 @@ client_log (CURL * curl, curl_infotype type, char *data, size_t size, void *cls)
  */
 static ssize_t
 http_client_plugin_send (void *cls,
-                  struct Session *session,
+                  struct Session *s,
                   const char *msgbuf, size_t msgbuf_size,
                   unsigned int priority,
                   struct GNUNET_TIME_Relative to,
@@ -436,19 +445,19 @@ http_client_plugin_send (void *cls,
   struct HTTP_Message *msg;
 
   GNUNET_assert (plugin != NULL);
-  GNUNET_assert (session != NULL);
+  GNUNET_assert (s != NULL);
 
   /* lookup if session is really existing */
-  if (GNUNET_YES != client_exist_session (plugin, session))
+  if (GNUNET_YES != client_exist_session (plugin, s))
   {
     GNUNET_break (0);
     return GNUNET_SYSERR;
   }
 
-  GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, session->plugin->name,
-                   "Session %p/connection %p: Sending message with %u to peer `%s' with \n",
-                   session, session->client_put,
-                   msgbuf_size, GNUNET_i2s (&session->target));
+  GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
+                   "Session %p/connection %p: Sending message with %u to peer `%s' \n",
+                   s, s->client_put,
+                   msgbuf_size, GNUNET_i2s (&s->target));
 
   /* create new message and schedule */
   msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
@@ -459,30 +468,45 @@ http_client_plugin_send (void *cls,
   msg->transmit_cont = cont;
   msg->transmit_cont_cls = cont_cls;
   memcpy (msg->buf, msgbuf, msgbuf_size);
-  GNUNET_CONTAINER_DLL_insert_tail (session->msg_head, session->msg_tail, msg);
+  GNUNET_CONTAINER_DLL_insert_tail (s->msg_head, s->msg_tail, msg);
 
-  if (GNUNET_YES == session->client_put_disconnect)
+  if (GNUNET_YES == s->put_tmp_disconnecting)
   {
-      session->client_put_disconnect = GNUNET_NO;
-      GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, session->plugin->name,
-                       "Session %p: Reconnecting PUT connection\n",
-                       session);
-      client_connect_put (session);
+    /* PUT connection is currently getting disconnected */
+    s->put_reconnect_required = GNUNET_YES;
+    GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
+                     "Session %p/connection %jp: currently disconnecting, reconnecting immediately\n",
+                     s, s->client_put);
+    return msgbuf_size;
   }
-
-  if (GNUNET_YES == session->client_put_paused)
+  else if (GNUNET_YES == s->put_paused)
   {
-    GNUNET_assert (session->put_disconnect_task != GNUNET_SCHEDULER_NO_TASK);
-    GNUNET_SCHEDULER_cancel (session->put_disconnect_task);
-    session->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
-    GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, session->plugin->name,
+    /* PUT connection was paused, unpause */
+    GNUNET_assert (s->put_disconnect_task != GNUNET_SCHEDULER_NO_TASK);
+    GNUNET_SCHEDULER_cancel (s->put_disconnect_task);
+    s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
+    GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
                      "Session %p/connection %p: unpausing connection\n",
-                     session, session->client_put);
-    session->client_put_paused = GNUNET_NO;
-    curl_easy_pause (session->client_put, CURLPAUSE_CONT);
+                     s, s->client_put);
+    s->put_paused = GNUNET_NO;
+    curl_easy_pause (s->client_put, CURLPAUSE_CONT);
+  }
+  else if (GNUNET_YES == s->put_tmp_disconnected)
+  {
+    /* PUT connection was disconnected, reconnect */
+    GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
+                     "Session %p: Reconnecting PUT connection\n",
+                     s);
+    s->put_tmp_disconnected = GNUNET_NO;
+    GNUNET_break (s->client_put == NULL);
+    if (GNUNET_SYSERR == client_connect_put (s))
+    {
+      return GNUNET_SYSERR;
+    }
   }
-  client_schedule (session->plugin, GNUNET_YES);
-  client_reschedule_session_timeout (session);
+
+  client_schedule (s->plugin, GNUNET_YES);
+  client_reschedule_session_timeout (s);
   return msgbuf_size;
 }
 
@@ -688,8 +712,8 @@ client_put_disconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
   GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
                    "Session %p/connection %p: will be disconnected due to no activity\n",
                    s, s->client_put);
-  s->client_put_disconnect = GNUNET_YES;
-  s->client_put_paused = GNUNET_NO;
+  s->put_paused = GNUNET_NO;
+  s->put_tmp_disconnecting = GNUNET_YES;
   curl_easy_pause (s->client_put, CURLPAUSE_CONT);
   client_schedule (s->plugin, GNUNET_YES);
 }
@@ -719,8 +743,9 @@ client_send_cb (void *stream, size_t size, size_t nmemb, void *cls)
     GNUNET_break (0);
     return 0;
   }
-  if (GNUNET_YES == s->client_put_disconnect)
+  if (GNUNET_YES == s->put_tmp_disconnecting)
   {
+
       GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
                        "Session %p/connection %p: disconnect due to inactivity\n",
                        s, s->client_put);
@@ -733,8 +758,7 @@ client_send_cb (void *stream, size_t size, size_t nmemb, void *cls)
                      "Session %p/connection %p: nothing to send, suspending\n",
                      s, s->client_put);
     s->put_disconnect_task = GNUNET_SCHEDULER_add_delayed (PUT_DISCONNECT_TIMEOUT, &client_put_disconnect, s);
-    s->client_put_disconnect = GNUNET_NO;
-    s->client_put_paused = GNUNET_YES;
+    s->put_paused = GNUNET_YES;
     return CURL_READFUNC_PAUSE;
   }
   /* data to send */
@@ -871,8 +895,9 @@ client_receive (void *stream, size_t size, size_t nmemb, void *cls)
   struct HTTP_Client_Plugin *plugin = s->plugin;
 
   GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
-                   "Received %u bytes from peer `%s'\n", len,
-                   GNUNET_i2s (&s->target));
+                   "Session %p / connection %p: Received %u bytes from peer `%s'\n",
+                   s, s->client_get,
+                   len, GNUNET_i2s (&s->target));
   now = GNUNET_TIME_absolute_get ();
   if (now.abs_value < s->next_receive.abs_value)
   {
@@ -880,8 +905,8 @@ client_receive (void *stream, size_t size, size_t nmemb, void *cls)
     struct GNUNET_TIME_Relative delta =
         GNUNET_TIME_absolute_get_difference (now, s->next_receive);
     GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
-                     "No inbound bandwidth for session %p available! Next read was delayed for %llu ms\n",
-                     s, delta.rel_value);
+                     "Session %p / connection %p: No inbound bandwidth available! Next read was delayed for %llu ms\n",
+                     s, s->client_get, delta.rel_value);
     if (s->recv_wakeup_task != GNUNET_SCHEDULER_NO_TASK)
     {
       GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
@@ -889,7 +914,7 @@ client_receive (void *stream, size_t size, size_t nmemb, void *cls)
     }
     s->recv_wakeup_task =
         GNUNET_SCHEDULER_add_delayed (delta, &client_wake_up, s);
-    return CURLPAUSE_ALL;
+    return CURL_WRITEFUNC_PAUSE;
   }
   if (NULL == s->msg_tk)
     s->msg_tk = GNUNET_SERVER_mst_create (&client_receive_mst_cb, s);
@@ -988,7 +1013,7 @@ client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 {
   struct HTTP_Client_Plugin *plugin = cls;
   int running;
-  int http_statuscode;
+  long http_statuscode;
   CURLMcode mret;
 
   GNUNET_assert (cls != NULL);
@@ -1054,9 +1079,22 @@ client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
             {
               /* Disconnect other transmission direction and tell transport */
             }
-            curl_multi_remove_handle(plugin->curl_multi_handle, easy_h);
-            curl_easy_cleanup(easy_h);
+            curl_multi_remove_handle (plugin->curl_multi_handle, easy_h);
+            curl_easy_cleanup (easy_h);
+            s->put_tmp_disconnecting = GNUNET_NO;
+            s->put_tmp_disconnected = GNUNET_YES;
             s->client_put = NULL;
+
+            /*
+             * Handling a rare case:
+             * plugin_send was called during temporary put disconnect,
+             * reconnect required after connection was disconnected
+             */
+            if (GNUNET_YES == s->put_reconnect_required)
+            {
+                s->put_reconnect_required = GNUNET_NO;
+                client_connect_put(s);
+            }
         }
         if (easy_h == s->client_get)
         {
@@ -1120,7 +1158,11 @@ client_connect_get (struct Session *s)
   mret = curl_multi_add_handle (s->plugin->curl_multi_handle, s->client_get);
   if (mret != CURLM_OK)
   {
+      GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, s->plugin->name,
+                       "Session %p : Failed to add GET handle to multihandle: `%s'\n",
+                       s, curl_multi_strerror (mret));
     curl_easy_cleanup (s->client_get);
+    s->client_get = NULL;
     GNUNET_break (0);
     return GNUNET_SYSERR;
   }
@@ -1133,8 +1175,9 @@ client_connect_put (struct Session *s)
 {
   CURLMcode mret;
   /* create put connection */
-  if (NULL == s->client_put)
-    s->client_put = curl_easy_init ();
+  GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
+                       "Session %p : Init PUT handle \n", s);
+  s->client_put = curl_easy_init ();
 #if VERBOSE_CURL
   curl_easy_setopt (s->client_put, CURLOPT_VERBOSE, 1L);
   curl_easy_setopt (s->client_put, CURLOPT_DEBUGFUNCTION, &client_log);
@@ -1147,11 +1190,6 @@ client_connect_put (struct Session *s)
 #endif
   curl_easy_setopt (s->client_put, CURLOPT_URL, s->url);
   curl_easy_setopt (s->client_put, CURLOPT_UPLOAD, 1L);
-  /*
-  struct curl_slist *m_headerlist;
-  m_headerlist = NULL;
-  m_headerlist = curl_slist_append(m_headerlist, "Transfer-Encoding: chunked");
-  curl_easy_setopt(s->client_put, CURLOPT_HTTPHEADER, m_headerlist);*/
   //curl_easy_setopt (s->client_put, CURLOPT_HEADERFUNCTION, &client_curl_header);
   //curl_easy_setopt (s->client_put, CURLOPT_WRITEHEADER, ps);
   curl_easy_setopt (s->client_put, CURLOPT_READFUNCTION, client_send_cb);
@@ -1168,12 +1206,14 @@ client_connect_put (struct Session *s)
 #if CURL_TCP_NODELAY
   curl_easy_setopt (s->client_put, CURLOPT_TCP_NODELAY, 1);
 #endif
-
   mret = curl_multi_add_handle (s->plugin->curl_multi_handle, s->client_put);
   if (mret != CURLM_OK)
   {
+   GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, s->plugin->name,
+                    "Session %p : Failed to add PUT handle to multihandle: `%s'\n",
+                    s, curl_multi_strerror (mret));
     curl_easy_cleanup (s->client_put);
-    GNUNET_break (0);
+    s->client_put = NULL;
     return GNUNET_SYSERR;
   }
   return GNUNET_OK;
@@ -1314,7 +1354,9 @@ http_client_plugin_get_session (void *cls,
   memcpy (s->addr, address->address, address->address_length);
   s->addrlen = address->address_length;
   s->ats_address_network_type = ats.value;
-
+  s->put_paused = GNUNET_NO;
+  s->put_tmp_disconnecting = GNUNET_NO;
+  s->put_tmp_disconnected = GNUNET_NO;
   client_start_session_timeout (s);
 
   /* add new session */