-fix NPE
[oweals/gnunet.git] / src / transport / plugin_transport_http_server.c
index 30a209a6bfe2c29cd9e23712dda71978a4b9049e..07137e0fba18da7601a52c8a253262ed8c768bc6 100644 (file)
@@ -1,6 +1,6 @@
 /*
      This file is part of GNUnet
-     (C) 2002-2014 Christian Grothoff (and other contributing authors)
+     Copyright (C) 2002-2014 Christian Grothoff (and other contributing authors)
 
      GNUnet is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published
@@ -14,8 +14,8 @@
 
      You should have received a copy of the GNU General Public License
      along with GNUnet; see the file COPYING.  If not, write to the
-     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-     Boston, MA 02111-1307, USA.
+     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+     Boston, MA 02110-1301, USA.
 */
 
 /**
 /**
  * Information we keep with MHD for an HTTP request.
  */
-struct ServerConnection
+struct ServerRequest
 {
   /**
-   * The session this server connection belongs to
+   * The session this server request belongs to
+   * Can be NULL, when session was disconnected and freed
    */
-  struct Session *session;
+  struct GNUNET_ATS_Session *session;
 
   /**
    * The MHD connection
@@ -86,8 +87,8 @@ struct ServerConnection
   int direction;
 
   /**
-   * For PUT connections: Is this the first or last callback with size 0
-   * For GET connections: Have we sent a message
+   * For PUT requests: Is this the first or last callback with size 0
+   * For GET requests: Have we sent a message
    */
   int connected;
 
@@ -173,7 +174,7 @@ struct HTTP_Message
 /**
  * Session handle for connections.
  */
-struct Session
+struct GNUNET_ATS_Session
 {
 
   /**
@@ -205,12 +206,12 @@ struct Session
   /**
    * Client recv handle
    */
-  struct ServerConnection *server_recv;
+  struct ServerRequest *server_recv;
 
   /**
    * Client send handle
    */
-  struct ServerConnection *server_send;
+  struct ServerRequest *server_send;
 
   /**
    * Address
@@ -231,12 +232,12 @@ struct Session
   /**
    * Session timeout task
    */
-  GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+  struct GNUNET_SCHEDULER_Task * timeout_task;
 
   /**
    * Task to resume MHD handling when receiving is allowed again
    */
-  GNUNET_SCHEDULER_TaskIdentifier recv_wakeup_task;
+  struct GNUNET_SCHEDULER_Task * recv_wakeup_task;
 
   /**
    * Number of bytes waiting for transmission to this peer.
@@ -254,9 +255,9 @@ struct Session
   uint32_t tag;
 
   /**
-   * ATS network type in NBO
+   * ATS network type.
    */
-  uint32_t ats_address_network_type;
+  enum GNUNET_ATS_Network_Type scope;
 
   /**
    * #GNUNET_YES if this session is known to the service.
@@ -373,17 +374,17 @@ struct HTTP_Server_Plugin
   /**
    * MHD IPv4 task
    */
-  GNUNET_SCHEDULER_TaskIdentifier server_v4_task;
+  struct GNUNET_SCHEDULER_Task * server_v4_task;
 
   /**
    * MHD IPv6 task
    */
-  GNUNET_SCHEDULER_TaskIdentifier server_v6_task;
+  struct GNUNET_SCHEDULER_Task * server_v6_task;
 
   /**
    * Task calling transport service about external address
    */
-  GNUNET_SCHEDULER_TaskIdentifier notify_ext_task;
+  struct GNUNET_SCHEDULER_Task * notify_ext_task;
 
   /**
    * Notify transport only about external address
@@ -407,15 +408,15 @@ struct HTTP_Server_Plugin
 
   /**
    * Maximum number of sockets the plugin can use
-   * Each http inbound /outbound connections are two connections
+   * Each http request /request connections are two connections
    */
-  unsigned int max_connections;
+  unsigned int max_request;
 
   /**
    * Current number of sockets the plugin can use
-   * Each http inbound /outbound connections are two connections
+   * Each http connection are two requests
    */
-  unsigned int cur_connections;
+  unsigned int cur_request;
 
   /**
    * Did we immediately end the session in disconnect_cb
@@ -465,7 +466,7 @@ struct HTTP_Server_Plugin
  */
 static void
 notify_session_monitor (struct HTTP_Server_Plugin *plugin,
-                        struct Session *session,
+                        struct GNUNET_ATS_Session *session,
                         enum GNUNET_TRANSPORT_SessionState state)
 {
   struct GNUNET_TRANSPORT_SessionInfo info;
@@ -496,9 +497,9 @@ static void
 server_wake_up (void *cls,
                 const struct GNUNET_SCHEDULER_TaskContext *tc)
 {
-  struct Session *s = cls;
+  struct GNUNET_ATS_Session *s = cls;
 
-  s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
+  s->recv_wakeup_task = NULL;
   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
     return;
   LOG (GNUNET_ERROR_TYPE_DEBUG,
@@ -528,23 +529,21 @@ server_reschedule (struct HTTP_Server_Plugin *plugin,
  * @param s the session to delete
  */
 static void
-server_delete_session (struct Session *s)
+server_delete_session (struct GNUNET_ATS_Session *s)
 {
   struct HTTP_Server_Plugin *plugin = s->plugin;
   struct HTTP_Message *msg;
-  struct ServerConnection *send;
-  struct ServerConnection *recv;
 
-  if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
+  if (NULL != s->timeout_task)
   {
     GNUNET_SCHEDULER_cancel (s->timeout_task);
-    s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+    s->timeout_task = NULL;
     s->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
   }
-  if (GNUNET_SCHEDULER_NO_TASK != s->recv_wakeup_task)
+  if (NULL != s->recv_wakeup_task)
   {
     GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
-    s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
+    s->recv_wakeup_task = NULL;
     if (NULL != s->server_recv)
       MHD_resume_connection (s->server_recv->mhd_conn);
   }
@@ -569,44 +568,44 @@ server_delete_session (struct Session *s)
     s->bytes_in_queue -= msg->size;
     GNUNET_free (msg);
   }
+
   GNUNET_assert (0 == s->msgs_in_queue);
   GNUNET_assert (0 == s->bytes_in_queue);
-  send = s->server_send;
-  if (NULL != send)
+
+  if (NULL != s->server_send)
   {
     LOG (GNUNET_ERROR_TYPE_DEBUG,
          "Server: %p / %p Terminating inbound PUT session to peer `%s'\n",
-         s, send,
+         s, s->server_send,
          GNUNET_i2s (&s->target));
-    send->session = NULL;
-    MHD_set_connection_option (send->mhd_conn,
+    s->server_send->session = NULL;
+    MHD_set_connection_option (s->server_send->mhd_conn,
                                MHD_CONNECTION_OPTION_TIMEOUT,
                                1 /* 0 = no timeout, so this is MIN */);
-    server_reschedule (plugin,
-                       send->mhd_daemon,
-                       GNUNET_YES);
+    server_reschedule (plugin, s->server_send->mhd_daemon, GNUNET_YES);
   }
-  recv = s->server_recv;
-  if (NULL != recv)
+
+  if (NULL != s->server_recv)
   {
     LOG (GNUNET_ERROR_TYPE_DEBUG,
          "Server: %p / %p Terminating inbound GET session to peer `%s'\n",
-         s, recv, GNUNET_i2s (&s->target));
-    recv->session = NULL;
-    MHD_set_connection_option (recv->mhd_conn,
+         s, s->server_recv, GNUNET_i2s (&s->target));
+    s->server_recv->session = NULL;
+    MHD_set_connection_option (s->server_recv->mhd_conn,
                                MHD_CONNECTION_OPTION_TIMEOUT,
                                1 /* 0 = no timeout, so this is MIN */);
-    server_reschedule (plugin,
-                       recv->mhd_daemon,
-                       GNUNET_YES);
+    server_reschedule (plugin, s->server_recv->mhd_daemon, GNUNET_YES);
   }
   notify_session_monitor (plugin,
                           s,
-                          GNUNET_TRANSPORT_SS_DOWN);
+                          GNUNET_TRANSPORT_SS_DONE);
   if (GNUNET_YES == s->known_to_service)
+  {
     plugin->env->session_end (plugin->env->cls,
                               s->address,
                               s);
+    s->known_to_service = GNUNET_NO;
+  }
   if (NULL != s->msg_tk)
   {
     GNUNET_SERVER_mst_destroy (s->msg_tk);
@@ -616,6 +615,7 @@ server_delete_session (struct Session *s)
   LOG (GNUNET_ERROR_TYPE_DEBUG,
        "Session %p destroyed\n",
        s);
+
   GNUNET_free (s);
 }
 
@@ -630,7 +630,7 @@ server_delete_session (struct Session *s)
  */
 static int
 http_server_plugin_disconnect_session (void *cls,
-                                       struct Session *s)
+                                       struct GNUNET_ATS_Session *s)
 {
   server_delete_session (s);
   return GNUNET_OK;
@@ -647,10 +647,10 @@ static void
 server_session_timeout (void *cls,
                         const struct GNUNET_SCHEDULER_TaskContext *tc)
 {
-  struct Session *s = cls;
+  struct GNUNET_ATS_Session *s = cls;
   struct GNUNET_TIME_Relative left;
 
-  s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+  s->timeout_task = NULL;
   left = GNUNET_TIME_absolute_get_remaining (s->timeout);
   if (0 != left.rel_value_us)
   {
@@ -679,9 +679,9 @@ server_session_timeout (void *cls,
  * @param s the session
  */
 static void
-server_reschedule_session_timeout (struct Session *s)
+server_reschedule_session_timeout (struct GNUNET_ATS_Session *s)
 {
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
+ GNUNET_assert (NULL != s->timeout_task);
   s->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
 }
 
@@ -715,7 +715,7 @@ server_reschedule_session_timeout (struct Session *s)
  */
 static ssize_t
 http_server_plugin_send (void *cls,
-                         struct Session *session,
+                         struct GNUNET_ATS_Session *session,
                          const char *msgbuf,
                          size_t msgbuf_size,
                          unsigned int priority,
@@ -729,7 +729,7 @@ http_server_plugin_send (void *cls,
   char *stat_txt;
 
   LOG (GNUNET_ERROR_TYPE_DEBUG,
-       "Session %p/connection %p: Sending message with %u to peer `%s'\n",
+       "Session %p/request %p: Sending message with %u to peer `%s'\n",
        session,
        session->server_send,
        msgbuf_size,
@@ -770,12 +770,39 @@ http_server_plugin_send (void *cls,
 }
 
 
+/**
+ * Terminate session during shutdown.
+ *
+ * @param cls the `struct HTTP_Server_Plugin *`
+ * @param peer for which this is a session
+ * @param value the `struct GNUNET_ATS_Session` to clean up
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+destroy_session_shutdown_cb (void *cls,
+                    const struct GNUNET_PeerIdentity *peer,
+                    void *value)
+{
+  struct GNUNET_ATS_Session *s = value;
+  struct ServerRequest *sc_send;
+  struct ServerRequest *sc_recv;
+
+  sc_send = s->server_send;
+  sc_recv = s->server_recv;
+  server_delete_session (s);
+
+  GNUNET_free_non_null (sc_send);
+  GNUNET_free_non_null (sc_recv);
+
+  return GNUNET_OK;
+}
+
 /**
  * Terminate session.
  *
  * @param cls the `struct HTTP_Server_Plugin *`
  * @param peer for which this is a session
- * @param value the `struct Session` to clean up
+ * @param value the `struct GNUNET_ATS_Session` to clean up
  * @return #GNUNET_OK (continue to iterate)
  */
 static int
@@ -783,13 +810,12 @@ destroy_session_cb (void *cls,
                     const struct GNUNET_PeerIdentity *peer,
                     void *value)
 {
-  struct Session *s = value;
+  struct GNUNET_ATS_Session *s = value;
 
   server_delete_session (s);
   return GNUNET_OK;
 }
 
-
 /**
  * Function that can be used to force the plugin to disconnect
  * from the given peer and cancel all previous transmissions
@@ -871,7 +897,7 @@ http_server_plugin_address_suggested (void *cls,
  * @param address the address
  * @return always NULL
  */
-static struct Session *
+static struct GNUNET_ATS_Session *
 http_server_plugin_get_session (void *cls,
                                 const struct GNUNET_HELLO_Address *address)
 {
@@ -892,7 +918,7 @@ server_v4_run (void *cls,
 {
   struct HTTP_Server_Plugin *plugin = cls;
 
-  plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
+  plugin->server_v4_task = NULL;
   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
     return;
   plugin->server_v4_immediately = GNUNET_NO;
@@ -914,7 +940,7 @@ server_v6_run (void *cls,
 {
   struct HTTP_Server_Plugin *plugin = cls;
 
-  plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
+  plugin->server_v6_task = NULL;
   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
     return;
   plugin->server_v6_immediately = GNUNET_NO;
@@ -929,14 +955,15 @@ server_v6_run (void *cls,
  *
  * @param plugin plugin
  * @param daemon_handle the MHD daemon handle
+ * @param now schedule now
  * @return gnunet task identifier
  */
-static GNUNET_SCHEDULER_TaskIdentifier
+static struct GNUNET_SCHEDULER_Task *
 server_schedule (struct HTTP_Server_Plugin *plugin,
                  struct MHD_Daemon *daemon_handle,
                  int now)
 {
-  GNUNET_SCHEDULER_TaskIdentifier ret;
+  struct GNUNET_SCHEDULER_Task * ret;
   fd_set rs;
   fd_set ws;
   fd_set es;
@@ -949,9 +976,9 @@ server_schedule (struct HTTP_Server_Plugin *plugin,
   struct GNUNET_TIME_Relative tv;
 
   if (GNUNET_YES == plugin->in_shutdown)
-    return GNUNET_SCHEDULER_NO_TASK;
+    return NULL;
 
-  ret = GNUNET_SCHEDULER_NO_TASK;
+  ret = NULL;
   FD_ZERO (&rs);
   FD_ZERO (&ws);
   FD_ZERO (&es);
@@ -989,10 +1016,10 @@ server_schedule (struct HTTP_Server_Plugin *plugin,
 
   if (daemon_handle == plugin->server_v4)
   {
-    if (plugin->server_v4_task != GNUNET_SCHEDULER_NO_TASK)
+    if (plugin->server_v4_task != NULL)
     {
       GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
-      plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
+      plugin->server_v4_task = NULL;
     }
 #if 0
     LOG (GNUNET_ERROR_TYPE_DEBUG,
@@ -1006,10 +1033,10 @@ server_schedule (struct HTTP_Server_Plugin *plugin,
   }
   if (daemon_handle == plugin->server_v6)
   {
-    if (plugin->server_v6_task != GNUNET_SCHEDULER_NO_TASK)
+    if (plugin->server_v6_task != NULL)
     {
       GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
-      plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
+      plugin->server_v6_task = NULL;
     }
 #if 0
     LOG (GNUNET_ERROR_TYPE_DEBUG,
@@ -1047,10 +1074,10 @@ server_reschedule (struct HTTP_Server_Plugin *plugin,
     if (GNUNET_YES == now)
       plugin->server_v4_immediately = GNUNET_YES;
 
-    if (plugin->server_v4_task != GNUNET_SCHEDULER_NO_TASK)
+    if (plugin->server_v4_task != NULL)
     {
       GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
-      plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
+      plugin->server_v4_task = NULL;
     }
     plugin->server_v4_task = server_schedule (plugin, plugin->server_v4, now);
   }
@@ -1063,10 +1090,10 @@ server_reschedule (struct HTTP_Server_Plugin *plugin,
     if (GNUNET_YES == now)
       plugin->server_v6_immediately = GNUNET_YES;
 
-    if (plugin->server_v6_task != GNUNET_SCHEDULER_NO_TASK)
+    if (plugin->server_v6_task != NULL)
     {
       GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
-      plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
+      plugin->server_v6_task = NULL;
     }
     plugin->server_v6_task = server_schedule (plugin, plugin->server_v6, now);
   }
@@ -1100,7 +1127,7 @@ http_server_query_keepalive_factor (void *cls)
 static void
 http_server_plugin_update_session_timeout (void *cls,
                                            const struct GNUNET_PeerIdentity *peer,
-                                           struct Session *session)
+                                           struct GNUNET_ATS_Session *session)
 {
   server_reschedule_session_timeout (session);
 }
@@ -1115,7 +1142,7 @@ http_server_plugin_update_session_timeout (void *cls,
  */
 static void
 server_mhd_connection_timeout (struct HTTP_Server_Plugin *plugin,
-                              struct Session *s,
+                              struct GNUNET_ATS_Session *s,
                               unsigned int to)
 {
   /* Setting timeouts for other connections */
@@ -1278,12 +1305,12 @@ server_parse_url (struct HTTP_Server_Plugin *plugin,
 /**
  * Closure for #session_tag_it().
  */
-struct SessionTagContext
+struct GNUNET_ATS_SessionTagContext
 {
   /**
    * Set to session matching the tag.
    */
-  struct Session *res;
+  struct GNUNET_ATS_Session *res;
 
   /**
    * Tag we are looking for.
@@ -1295,9 +1322,9 @@ struct SessionTagContext
 /**
  * Find a session with a matching tag.
  *
- * @param cls the `struct SessionTagContext *`
+ * @param cls the `struct GNUNET_ATS_SessionTagContext *`
  * @param key peer identity (unused)
- * @param value the `struct Session *`
+ * @param value the `struct GNUNET_ATS_Session *`
  * @return #GNUNET_NO if we found the session, #GNUNET_OK if not
  */
 static int
@@ -1305,8 +1332,8 @@ session_tag_it (void *cls,
                 const struct GNUNET_PeerIdentity *key,
                 void *value)
 {
-  struct SessionTagContext *stc = cls;
-  struct Session *s = value;
+  struct GNUNET_ATS_SessionTagContext *stc = cls;
+  struct GNUNET_ATS_Session *s = value;
 
   if (s->tag == stc->tag)
   {
@@ -1326,23 +1353,23 @@ session_tag_it (void *cls,
  * @param method PUT or GET
  * @return the server connecetion
  */
-static struct ServerConnection *
+static struct ServerRequest *
 server_lookup_connection (struct HTTP_Server_Plugin *plugin,
                           struct MHD_Connection *mhd_connection,
                           const char *url,
                           const char *method)
 {
-  struct Session *s = NULL;
-  struct ServerConnection *sc = NULL;
+  struct GNUNET_ATS_Session *s = NULL;
+  struct ServerRequest *sc = NULL;
   const union MHD_ConnectionInfo *conn_info;
   struct HttpAddress *addr;
-  struct GNUNET_ATS_Information ats;
   struct GNUNET_PeerIdentity target;
   size_t addr_len;
-  struct SessionTagContext stc;
+  struct GNUNET_ATS_SessionTagContext stc;
   uint32_t options;
   int direction = GNUNET_SYSERR;
   unsigned int to;
+  enum GNUNET_ATS_Network_Type scope;
 
   conn_info = MHD_get_connection_info (mhd_connection,
                                        MHD_CONNECTION_INFO_CLIENT_ADDRESS);
@@ -1350,10 +1377,11 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
       (conn_info->client_addr->sa_family != AF_INET6))
     return NULL;
   LOG (GNUNET_ERROR_TYPE_DEBUG,
-       "New %s connection from %s\n",
+       "New %s request from %s\n",
        method,
        url);
   stc.tag = 0;
+  options = 0; /* make gcc happy */
   if (GNUNET_SYSERR ==
       server_parse_url (plugin, url, &target, &stc.tag, &options))
   {
@@ -1368,18 +1396,18 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
   else
   {
     LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Invalid method %s connection from %s\n",
+         "Invalid method %s for request from %s\n",
          method, url);
     return NULL;
   }
 
-  plugin->cur_connections++;
+  plugin->cur_request++;
   LOG (GNUNET_ERROR_TYPE_DEBUG,
-       "New %s connection from %s with tag %u (%u of %u)\n",
+       "New %s request from %s with tag %u (%u of %u)\n",
        method,
        GNUNET_i2s (&target),
        stc.tag,
-       plugin->cur_connections, plugin->max_connections);
+       plugin->cur_request, plugin->max_request);
   /* find existing session */
   stc.res = NULL;
   GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
@@ -1397,34 +1425,32 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
                                               conn_info->client_addr,
                                               sizeof (struct sockaddr_in));
       addr_len = http_common_address_get_size (addr);
-      ats = plugin->env->get_address_type (plugin->env->cls,
-                                           conn_info->client_addr,
-                                           sizeof (struct sockaddr_in));
+      scope = plugin->env->get_address_type (plugin->env->cls,
+                                             conn_info->client_addr,
+                                             sizeof (struct sockaddr_in));
       break;
     case (AF_INET6):
       addr = http_common_address_from_socket (plugin->protocol,
                                               conn_info->client_addr,
                                               sizeof (struct sockaddr_in6));
       addr_len = http_common_address_get_size (addr);
-      ats = plugin->env->get_address_type (plugin->env->cls,
-                                           conn_info->client_addr,
-                                           sizeof (struct sockaddr_in6));
+      scope = plugin->env->get_address_type (plugin->env->cls,
+                                             conn_info->client_addr,
+                                             sizeof (struct sockaddr_in6));
       break;
     default:
-       /* external host name */
-      ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
-      ats.type = htonl (GNUNET_ATS_NET_WAN);
+      /* external host name */
       return NULL;
     }
-    s = GNUNET_new (struct Session);
+    s = GNUNET_new (struct GNUNET_ATS_Session);
     s->target = target;
     s->plugin = plugin;
+    s->scope = scope;
     s->address = GNUNET_HELLO_address_allocate (&s->target,
                                                 PLUGIN_NAME,
                                                 addr,
                                                 addr_len,
                                                 GNUNET_HELLO_ADDRESS_INFO_INBOUND);
-    s->ats_address_network_type = ats.value;
     s->next_receive = GNUNET_TIME_UNIT_ZERO_ABS;
     s->tag = stc.tag;
     s->timeout = GNUNET_TIME_relative_to_absolute (HTTP_SERVER_SESSION_TIMEOUT);
@@ -1435,6 +1461,9 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
                                               &s->target,
                                               s,
                                               GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+    notify_session_monitor (plugin,
+                            s,
+                            GNUNET_TRANSPORT_SS_INIT);
     notify_session_monitor (plugin,
                             s,
                             GNUNET_TRANSPORT_SS_HANDSHAKE);
@@ -1451,7 +1480,7 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
        (NULL != s->server_recv) )
   {
     LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Duplicate PUT connection from `%s' tag %u, dismissing new connection\n",
+         "Duplicate PUT request from `%s' tag %u, dismissing new request\n",
          GNUNET_i2s (&target),
          stc.tag);
     return NULL;
@@ -1459,12 +1488,12 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
   if ((_SEND == direction) && (NULL != s->server_send))
   {
     LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Duplicate GET connection from `%s' tag %u, dismissing new connection\n",
+         "Duplicate GET request from `%s' tag %u, dismissing new request\n",
          GNUNET_i2s (&target),
          stc.tag);
     return NULL;
   }
-  sc = GNUNET_new (struct ServerConnection);
+  sc = GNUNET_new (struct ServerRequest);
   if (conn_info->client_addr->sa_family == AF_INET)
     sc->mhd_daemon = plugin->server_v4;
   if (conn_info->client_addr->sa_family == AF_INET6)
@@ -1475,35 +1504,30 @@ server_lookup_connection (struct HTTP_Server_Plugin *plugin,
   sc->session = s;
   sc->options = options;
   if (direction == _SEND)
+  {
     s->server_send = sc;
+  }
   if (direction == _RECEIVE)
+  {
     s->server_recv = sc;
+  }
 
-  if ( (NULL != s->server_send) &&
-       (NULL != s->server_recv) )
+  if ((GNUNET_NO == s->known_to_service) &&
+      (NULL != s->server_send) &&
+      (NULL != s->server_recv) )
   {
     s->known_to_service = GNUNET_YES;
-    plugin->env->session_start (NULL, s->address ,s, NULL, 0);
+    notify_session_monitor (plugin,
+                            s,
+                            GNUNET_TRANSPORT_SS_UP);
+    plugin->env->session_start (plugin->env->cls,
+                                s->address,
+                                s,
+                                s->scope);
   }
 
-  if ( (NULL == s->server_recv) ||
-       (NULL == s->server_send) )
-  {
-    to = (HTTP_SERVER_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL / 1000LL);
-    MHD_set_connection_option (mhd_connection,
-                              MHD_CONNECTION_OPTION_TIMEOUT, to);
-    server_reschedule (plugin, sc->mhd_daemon, GNUNET_NO);
-  }
-  else
-  {
-    LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Session %p for peer `%s' fully connected\n",
-         s, GNUNET_i2s (&target));
-    to = (HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL);
-    server_mhd_connection_timeout (plugin, s, to);
-  }
-  LOG (GNUNET_ERROR_TYPE_DEBUG,
-       "Setting timeout for %p to %u sec.\n", sc, to);
+  to = (HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL);
+  server_mhd_connection_timeout (plugin, s, to);
   return sc;
 }
 
@@ -1523,12 +1547,18 @@ server_send_callback (void *cls,
                       char *buf,
                       size_t max)
 {
-  struct Session *s = cls;
-  struct ServerConnection *sc;
+  struct ServerRequest *sc = cls;
+  struct GNUNET_ATS_Session *s = sc->session;
   ssize_t bytes_read = 0;
   struct HTTP_Message *msg;
   char *stat_txt;
 
+  if (NULL == s)
+  {
+    /* session is disconnecting */
+    return 0;
+  }
+
   sc = s->server_send;
   if (NULL == sc)
     return 0;
@@ -1557,7 +1587,7 @@ server_send_callback (void *cls,
       GNUNET_free (msg);
       notify_session_monitor (s->plugin,
                               s,
-                              GNUNET_TRANSPORT_SS_UP);
+                              GNUNET_TRANSPORT_SS_UPDATE);
     }
   }
   if (0 < bytes_read)
@@ -1608,25 +1638,18 @@ server_receive_mst_cb (void *cls,
                        void *client,
                        const struct GNUNET_MessageHeader *message)
 {
-  struct Session *s = cls;
+  struct GNUNET_ATS_Session *s = cls;
   struct HTTP_Server_Plugin *plugin = s->plugin;
-  struct GNUNET_ATS_Information atsi;
   struct GNUNET_TIME_Relative delay;
   char *stat_txt;
 
-  atsi.type = htonl (GNUNET_ATS_NETWORK_TYPE);
-  atsi.value = s->ats_address_network_type;
-  GNUNET_break (s->ats_address_network_type !=
-                ntohl (GNUNET_ATS_NET_UNSPECIFIED));
-
   if (GNUNET_NO == s->known_to_service)
   {
     s->known_to_service = GNUNET_YES;
-    plugin->env->session_start (NULL,
+    plugin->env->session_start (plugin->env->cls,
                                 s->address,
                                 s,
-                                NULL,
-                                0);
+                                s->scope);
     notify_session_monitor (plugin,
                             s,
                             GNUNET_TRANSPORT_SS_UP);
@@ -1635,9 +1658,6 @@ server_receive_mst_cb (void *cls,
                                 s->address,
                                 s,
                                 message);
-  plugin->env->update_address_metrics (plugin->env->cls,
-                                       s->address, s,
-                                       &atsi, 1);
   GNUNET_asprintf (&stat_txt,
                    "# bytes received via %s_server",
                    plugin->protocol);
@@ -1706,16 +1726,16 @@ server_access_cb (void *cls,
                   void **httpSessionCache)
 {
   struct HTTP_Server_Plugin *plugin = cls;
-  struct ServerConnection *sc = *httpSessionCache;
-  struct Session *s;
+  struct ServerRequest *sc = *httpSessionCache;
+  struct GNUNET_ATS_Session *s;
   struct MHD_Response *response;
   int res = MHD_YES;
 
   LOG (GNUNET_ERROR_TYPE_DEBUG,
        _("Access from connection %p (%u of %u) for `%s' `%s' url `%s' with upload data size %u\n"),
        sc,
-       plugin->cur_connections,
-       plugin->max_connections,
+       plugin->cur_request,
+       plugin->max_request,
        method,
        version,
        url,
@@ -1726,7 +1746,7 @@ server_access_cb (void *cls,
     if (0 == strcmp (MHD_HTTP_METHOD_OPTIONS, method))
     {
       response = MHD_create_response_from_buffer (0, NULL,
-                                                  MHD_RESPMEM_PERSISTENT);
+          MHD_RESPMEM_PERSISTENT);
       add_cors_headers(response);
       res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
       MHD_destroy_response (response);
@@ -1742,10 +1762,9 @@ server_access_cb (void *cls,
     else
     {
       /* existing session already has matching connection, refuse */
-      response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),
-                                                HTTP_ERROR_RESPONSE,
-                                                MHD_NO,
-                                                MHD_NO);
+      response = MHD_create_response_from_buffer (strlen (HTTP_ERROR_RESPONSE),
+                                                  HTTP_ERROR_RESPONSE,
+                                                  MHD_RESPMEM_PERSISTENT);
       MHD_add_response_header (response,
                               MHD_HTTP_HEADER_CONTENT_TYPE,
                               "text/html");
@@ -1760,9 +1779,9 @@ server_access_cb (void *cls,
   {
     /* Session was already disconnected;
        sent HTTP/1.1: 200 OK as response */
-    response = MHD_create_response_from_data (strlen ("Thank you!"),
-                                              "Thank you!",
-                                              MHD_NO, MHD_NO);
+    response = MHD_create_response_from_buffer (strlen ("Thank you!"),
+                                                "Thank you!",
+                                                MHD_RESPMEM_PERSISTENT);
     add_cors_headers(response);
     MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
     MHD_destroy_response (response);
@@ -1771,10 +1790,8 @@ server_access_cb (void *cls,
 
   if (sc->direction == _SEND)
   {
-    response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
-                                                  32 * 1024,
-                                                  &server_send_callback, s,
-                                                  NULL);
+    response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN, 32 * 1024,
+        &server_send_callback, sc, NULL);
     add_cors_headers(response);
     MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
     MHD_destroy_response (response);
@@ -1807,9 +1824,9 @@ server_access_cb (void *cls,
                                                  s->address->address_length));
       sc->connected = GNUNET_NO;
       /* Sent HTTP/1.1: 200 OK as PUT Response\ */
-      response = MHD_create_response_from_data (strlen ("Thank you!"),
-                                         "Thank you!",
-                                         MHD_NO, MHD_NO);
+      response = MHD_create_response_from_buffer (strlen ("Thank you!"),
+                                                  "Thank you!",
+                                                  MHD_RESPMEM_PERSISTENT);
       add_cors_headers(response);
       MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
       MHD_destroy_response (response);
@@ -1838,26 +1855,24 @@ server_access_cb (void *cls,
         {
           s->msg_tk = GNUNET_SERVER_mst_create (&server_receive_mst_cb, s);
         }
-        GNUNET_SERVER_mst_receive (s->msg_tk, s, upload_data,
-                                   *upload_data_size, GNUNET_NO, GNUNET_NO);
+        GNUNET_SERVER_mst_receive (s->msg_tk, s, upload_data, *upload_data_size,
+            GNUNET_NO, GNUNET_NO);
         server_mhd_connection_timeout (plugin, s,
-                                      GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value_us / 1000LL / 1000LL);
+            GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value_us / 1000LL
+                / 1000LL);
         (*upload_data_size) = 0;
       }
       else
       {
         /* delay processing */
-        GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                    "Session %p / Connection %p: no inbound bandwidth available! Next read was delayed by %s\n",
-                    s, sc,
-                   GNUNET_STRINGS_relative_time_to_string (delay,
-                                                           GNUNET_YES));
-        GNUNET_assert (s->server_recv->mhd_conn == mhd_connection);
+        GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+            "Session %p / Connection %p: no inbound bandwidth available! Next read was delayed by %s\n",
+            s, sc, GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
+        GNUNET_assert(s->server_recv->mhd_conn == mhd_connection);
         MHD_suspend_connection (s->server_recv->mhd_conn);
-        if (GNUNET_SCHEDULER_NO_TASK == s->recv_wakeup_task)
+        if (NULL == s->recv_wakeup_task)
           s->recv_wakeup_task = GNUNET_SCHEDULER_add_delayed (delay,
-                                                              &server_wake_up,
-                                                              s);
+              &server_wake_up, s);
       }
       return MHD_YES;
     }
@@ -1884,66 +1899,50 @@ server_disconnect_cb (void *cls,
                       void **httpSessionCache)
 {
   struct HTTP_Server_Plugin *plugin = cls;
-  struct ServerConnection *sc = *httpSessionCache;
-  struct Session *s;
+  struct ServerRequest *sc = *httpSessionCache;
 
   LOG (GNUNET_ERROR_TYPE_DEBUG,
        "Disconnect for connection %p\n",
        sc);
   if (NULL == sc)
-    return; /* never really got setup */
-  if (NULL == (s = sc->session))
-    return; /* session already dead */
-  if (sc->direction == _SEND)
   {
-    LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Peer `%s' connection  %p, GET on address `%s' disconnected\n",
-         GNUNET_i2s (&s->target),
-         s->server_send,
-         http_common_plugin_address_to_string (plugin->protocol,
-                                               s->address->address,
-                                               s->address->address_length));
-    s->server_send = NULL;
-    if (! ( (0 != (sc->options & OPTION_LONG_POLL)) &&
-            (NULL != s->server_recv) ) )
-    {
-      server_delete_session (s);
-      GNUNET_free (sc);
-      plugin->cur_connections--;
-      return;
-    }
+    /* CORS pre-flight request finished */
+    return;
   }
-  if (sc->direction == _RECEIVE)
+
+  if (NULL != sc->session)
   {
-    LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Peer `%s' connection %p PUT on address `%s' disconnected\n",
-         GNUNET_i2s (&s->target),
-         s->server_recv,
-         http_common_plugin_address_to_string (plugin->protocol,
-                                               s->address->address,
-                                               s->address->address_length));
-    s->server_recv = NULL;
-    if (NULL != s->msg_tk)
+    if (sc->direction == _SEND)
     {
-      GNUNET_SERVER_mst_destroy (s->msg_tk);
-      s->msg_tk = NULL;
+      LOG (GNUNET_ERROR_TYPE_DEBUG,
+           "Peer `%s' connection  %p, GET on address `%s' disconnected\n",
+           GNUNET_i2s (&sc->session->target),
+           sc->session->server_send,
+           http_common_plugin_address_to_string (plugin->protocol,
+               sc->session->address->address,
+               sc->session->address->address_length));
+
+      sc->session->server_send = NULL;
+    }
+    else if (sc->direction == _RECEIVE)
+    {
+      LOG (GNUNET_ERROR_TYPE_DEBUG,
+           "Peer `%s' connection %p PUT on address `%s' disconnected\n",
+           GNUNET_i2s (&sc->session->target),
+           sc->session->server_recv,
+           http_common_plugin_address_to_string (plugin->protocol,
+               sc->session->address->address,
+               sc->session->address->address_length));
+      sc->session->server_recv = NULL;
+      if (NULL != sc->session->msg_tk)
+      {
+        GNUNET_SERVER_mst_destroy (sc->session->msg_tk);
+        sc->session->msg_tk = NULL;
+      }
     }
   }
   GNUNET_free (sc);
-  plugin->cur_connections--;
-
-  if ( (NULL == s->server_send) &&
-       (NULL == s->server_recv) )
-  {
-    LOG (GNUNET_ERROR_TYPE_DEBUG,
-         "Peer `%s' on address `%s' disconnected\n",
-         GNUNET_i2s (&s->target),
-         http_common_plugin_address_to_string (plugin->protocol,
-                                               s->address->address,
-                                               s->address->address_length));
-
-    server_delete_session (s);
-  }
+  plugin->cur_request--;
 }
 
 
@@ -1962,11 +1961,11 @@ server_accept_cb (void *cls,
 {
   struct HTTP_Server_Plugin *plugin = cls;
 
-  if (plugin->cur_connections <= plugin->max_connections)
+  if (plugin->cur_request <= plugin->max_request)
   {
     LOG (GNUNET_ERROR_TYPE_DEBUG,
          _("Accepting connection (%u of %u) from `%s'\n"),
-         plugin->cur_connections, plugin->max_connections,
+         plugin->cur_request, plugin->max_request,
          GNUNET_a2s (addr, addr_len));
     return MHD_YES;
   }
@@ -1974,7 +1973,7 @@ server_accept_cb (void *cls,
   {
     LOG (GNUNET_ERROR_TYPE_WARNING,
          _("Server reached maximum number connections (%u), rejecting new connection\n"),
-         plugin->max_connections);
+         plugin->max_request);
     return MHD_NO;
   }
 }
@@ -2117,8 +2116,10 @@ server_load_certificate (struct HTTP_Server_Plugin *plugin)
                                  NULL, NULL, NULL,
                                  "gnunet-transport-certificate-creation",
                                  "gnunet-transport-certificate-creation",
-                                 key_file, cert_file, NULL);
-    if (cert_creation == NULL)
+                                 key_file,
+                                 cert_file,
+                                 NULL);
+    if (NULL == cert_creation)
     {
       LOG (GNUNET_ERROR_TYPE_ERROR,
            _("Could not create a new TLS certificate, program `gnunet-transport-certificate-creation' could not be started!\n"));
@@ -2160,34 +2161,29 @@ server_load_certificate (struct HTTP_Server_Plugin *plugin)
   }
   GNUNET_free (key_file);
   GNUNET_free (cert_file);
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TLS certificate loaded\n");
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "TLS certificate loaded\n");
   return res;
 }
 #endif
 
 
 /**
- * Start the HTTP server
+ * Invoke `MHD_start_daemon` with the various options we need to
+ * setup the HTTP server with the given listen address.
  *
- * @param plugin the plugin handle
- * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ * @param plugin our plugin
+ * @param addr listen address to use
+ * @param v6 MHD_NO_FLAG or MHD_USE_IPv6, depending on context
+ * @return NULL on error
  */
-static int
-server_start (struct HTTP_Server_Plugin *plugin)
+static struct MHD_Daemon *
+run_mhd_start_daemon (struct HTTP_Server_Plugin *plugin,
+                      const struct sockaddr_in *addr,
+                      int v6)
 {
+  struct MHD_Daemon *server;
   unsigned int timeout;
-  char *msg;
-  GNUNET_assert (NULL != plugin);
-
-#if BUILD_HTTPS
-  if (GNUNET_SYSERR == server_load_certificate (plugin))
-  {
-    LOG (GNUNET_ERROR_TYPE_ERROR,
-         "Could not load or create server certificate! Loading plugin failed!\n");
-    return GNUNET_SYSERR;
-  }
-#endif
-
 
 #if MHD_VERSION >= 0x00090E00
   timeout = HTTP_SERVER_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL / 1000LL;
@@ -2200,48 +2196,103 @@ server_start (struct HTTP_Server_Plugin *plugin)
        "MHD cannot set timeout per connection! Default time out %u sec.\n",
        timeout);
 #endif
-
-  plugin->server_v4 = NULL;
-  if (plugin->use_ipv4 == GNUNET_YES)
-  {
-    plugin->server_v4 = MHD_start_daemon (
+  server = MHD_start_daemon (
 #if VERBOSE_SERVER
-                                           MHD_USE_DEBUG |
+                             MHD_USE_DEBUG |
 #endif
 #if BUILD_HTTPS
-                                           MHD_USE_SSL |
+                             MHD_USE_SSL |
 #endif
-                                           MHD_NO_FLAG, plugin->port,
-                                           &server_accept_cb, plugin,
-                                           &server_access_cb, plugin,
-                                           MHD_OPTION_SOCK_ADDR,
-                                           (struct sockaddr_in *)
-                                           plugin->server_addr_v4,
-                                           MHD_OPTION_CONNECTION_LIMIT,
-                                           (unsigned int)
-                                           plugin->max_connections,
+                             MHD_USE_SUSPEND_RESUME |
+                             v6,
+                             plugin->port,
+                             &server_accept_cb, plugin,
+                             &server_access_cb, plugin,
+                             MHD_OPTION_SOCK_ADDR,
+                             addr,
+                             MHD_OPTION_CONNECTION_LIMIT,
+                             (unsigned int) plugin->max_request,
 #if BUILD_HTTPS
-                                           MHD_OPTION_HTTPS_PRIORITIES,
-                                           plugin->crypto_init,
-                                           MHD_OPTION_HTTPS_MEM_KEY,
-                                           plugin->key,
-                                           MHD_OPTION_HTTPS_MEM_CERT,
-                                           plugin->cert,
+                             MHD_OPTION_HTTPS_PRIORITIES,
+                             plugin->crypto_init,
+                             MHD_OPTION_HTTPS_MEM_KEY,
+                             plugin->key,
+                             MHD_OPTION_HTTPS_MEM_CERT,
+                             plugin->cert,
 #endif
-                                           MHD_OPTION_CONNECTION_TIMEOUT,
-                                           timeout,
-                                           MHD_OPTION_CONNECTION_MEMORY_LIMIT,
-                                           (size_t) (2 *
-                                                     GNUNET_SERVER_MAX_MESSAGE_SIZE),
-                                           MHD_OPTION_NOTIFY_COMPLETED,
-                                           &server_disconnect_cb, plugin,
-                                           MHD_OPTION_EXTERNAL_LOGGER,
-                                           server_log, NULL, MHD_OPTION_END);
-    if (plugin->server_v4 == NULL)
+                             MHD_OPTION_CONNECTION_TIMEOUT,
+                             timeout,
+                             MHD_OPTION_CONNECTION_MEMORY_LIMIT,
+                             (size_t) (2 *
+                                       GNUNET_SERVER_MAX_MESSAGE_SIZE),
+                             MHD_OPTION_NOTIFY_COMPLETED,
+                             &server_disconnect_cb, plugin,
+                             MHD_OPTION_EXTERNAL_LOGGER,
+                             &server_log, NULL,
+                             MHD_OPTION_END);
+#ifdef TCP_STEALTH
+  if ( (NULL != server) &&
+       (0 != (plugin->options & HTTP_OPTIONS_TCP_STEALTH)) )
+  {
+    const union MHD_DaemonInfo *di;
+
+    di = MHD_get_daemon_info (server,
+                              MHD_DAEMON_INFO_LISTEN_FD,
+                              NULL);
+    if ( (0 != setsockopt ((int) di->listen_fd,
+                           IPPROTO_TCP,
+                           TCP_STEALTH,
+                           plugin->env->my_identity,
+                           sizeof (struct GNUNET_PeerIdentity))) )
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  _("TCP_STEALTH not supported on this platform.\n"));
+      MHD_stop_daemon (server);
+      server = NULL;
+    }
+  }
+#endif
+  return server;
+}
+
+
+/**
+ * Start the HTTP server
+ *
+ * @param plugin the plugin handle
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ */
+static int
+server_start (struct HTTP_Server_Plugin *plugin)
+{
+  const char *msg;
+
+  GNUNET_assert (NULL != plugin);
+#if BUILD_HTTPS
+  if (GNUNET_SYSERR == server_load_certificate (plugin))
+  {
+    LOG (GNUNET_ERROR_TYPE_ERROR,
+         _("Could not load or create server certificate! Loading plugin failed!\n"));
+    return GNUNET_SYSERR;
+  }
+#endif
+
+
+
+  plugin->server_v4 = NULL;
+  if (GNUNET_YES == plugin->use_ipv4)
+  {
+    plugin->server_v4
+      = run_mhd_start_daemon (plugin,
+                              (const struct sockaddr_in *) plugin->server_addr_v4,
+                              MHD_NO_FLAG);
+
+    if (NULL == plugin->server_v4)
     {
       LOG (GNUNET_ERROR_TYPE_ERROR,
            "Failed to start %s IPv4 server component on port %u\n",
-           plugin->name, plugin->port);
+           plugin->name,
+           plugin->port);
     }
     else
       server_reschedule (plugin,
@@ -2251,69 +2302,49 @@ server_start (struct HTTP_Server_Plugin *plugin)
 
 
   plugin->server_v6 = NULL;
-  if (plugin->use_ipv6 == GNUNET_YES)
+  if (GNUNET_YES == plugin->use_ipv6)
   {
-    plugin->server_v6 = MHD_start_daemon (
-#if VERBOSE_SERVER
-                                           MHD_USE_DEBUG |
-#endif
-#if BUILD_HTTPS
-                                           MHD_USE_SSL |
-#endif
-                                           MHD_USE_IPv6, plugin->port,
-                                           &server_accept_cb, plugin,
-                                           &server_access_cb, plugin,
-                                           MHD_OPTION_SOCK_ADDR,
-                                           (struct sockaddr_in6 *)
-                                           plugin->server_addr_v6,
-                                           MHD_OPTION_CONNECTION_LIMIT,
-                                           (unsigned int)
-                                           plugin->max_connections,
-#if BUILD_HTTPS
-                                           MHD_OPTION_HTTPS_PRIORITIES,
-                                           plugin->crypto_init,
-                                           MHD_OPTION_HTTPS_MEM_KEY,
-                                           plugin->key,
-                                           MHD_OPTION_HTTPS_MEM_CERT,
-                                           plugin->cert,
-#endif
-                                           MHD_OPTION_CONNECTION_TIMEOUT,
-                                           timeout,
-                                           MHD_OPTION_CONNECTION_MEMORY_LIMIT,
-                                           (size_t) (2 *
-                                                     GNUNET_SERVER_MAX_MESSAGE_SIZE),
-                                           MHD_OPTION_NOTIFY_COMPLETED,
-                                           &server_disconnect_cb, plugin,
-                                           MHD_OPTION_EXTERNAL_LOGGER,
-                                           server_log, NULL, MHD_OPTION_END);
-    if (plugin->server_v6 == NULL)
+    plugin->server_v6
+      = run_mhd_start_daemon (plugin,
+                              (const struct sockaddr_in *) plugin->server_addr_v6,
+                              MHD_USE_IPv6);
+    if (NULL == plugin->server_v6)
     {
       LOG (GNUNET_ERROR_TYPE_ERROR,
            "Failed to start %s IPv6 server component on port %u\n",
-           plugin->name, plugin->port);
+           plugin->name,
+           plugin->port);
     }
     else
-       server_reschedule (plugin, plugin->server_v6, GNUNET_NO);
+    {
+      server_reschedule (plugin,
+                         plugin->server_v6,
+                         GNUNET_NO);
+    }
   }
-
-       msg = "No";
-  if ((plugin->server_v6 == NULL) && (plugin->server_v4 == NULL))
+  msg = "No";
+  if ( (NULL == plugin->server_v6) &&
+       (NULL == plugin->server_v4) )
   {
     LOG (GNUNET_ERROR_TYPE_ERROR,
          "%s %s server component started on port %u\n",
-         msg, plugin->name, plugin->port);
-    sleep (10);
+         msg,
+         plugin->name,
+         plugin->port);
     return GNUNET_SYSERR;
   }
-  else if ((plugin->server_v6 != NULL) && (plugin->server_v4 != NULL))
-       msg = "IPv4 and IPv6";
-  else if (plugin->server_v6 != NULL)
-       msg = "IPv6";
-  else if (plugin->server_v4 != NULL)
-       msg = "IPv4";
+  if ((NULL != plugin->server_v6) &&
+      (NULL != plugin->server_v4))
+    msg = "IPv4 and IPv6";
+  else if (NULL != plugin->server_v6)
+    msg = "IPv6";
+  else if (NULL != plugin->server_v4)
+    msg = "IPv4";
   LOG (GNUNET_ERROR_TYPE_DEBUG,
        "%s %s server component started on port %u\n",
-       msg, plugin->name, plugin->port);
+       msg,
+       plugin->name,
+       plugin->port);
   return GNUNET_OK;
 }
 
@@ -2730,7 +2761,7 @@ server_start_report_addresses (struct HTTP_Server_Plugin *plugin)
                            plugin->port,
                            (unsigned int) res,
                            (const struct sockaddr **) addrs, addrlens,
-                           &server_nat_port_map_callback, NULL, plugin);
+                           &server_nat_port_map_callback, NULL, plugin, NULL);
   while (res > 0)
   {
     res--;
@@ -2825,7 +2856,7 @@ server_notify_external_hostname (void *cls,
   unsigned int urlen;
   char *url;
 
-  plugin->notify_ext_task = GNUNET_SCHEDULER_NO_TASK;
+  plugin->notify_ext_task = NULL;
   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
     return;
 
@@ -2836,7 +2867,7 @@ server_notify_external_hostname (void *cls,
 
   urlen = strlen (url) + 1;
   ext_addr = GNUNET_malloc (sizeof (struct HttpAddress) + urlen);
-  ext_addr->options = htonl(plugin->options);
+  ext_addr->options = htonl (plugin->options);
   ext_addr->urlen = htonl (urlen);
   ext_addr_len = sizeof (struct HttpAddress) + urlen;
   memcpy (&ext_addr[1], url, urlen);
@@ -3084,11 +3115,11 @@ server_configure_plugin (struct HTTP_Server_Plugin *plugin)
                                              "MAX_CONNECTIONS",
                                              &max_connections))
     max_connections = 128;
-  plugin->max_connections = max_connections;
+  plugin->max_request = max_connections;
 
   LOG (GNUNET_ERROR_TYPE_DEBUG,
        _("Maximum number of connections is %u\n"),
-       plugin->max_connections);
+       plugin->max_request);
 
   plugin->peer_id_length = strlen (GNUNET_i2s_full (plugin->env->my_identity));
 
@@ -3115,14 +3146,14 @@ LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
     return NULL;
   }
   plugin->in_shutdown = GNUNET_YES;
-  LOG (GNUNET_ERROR_TYPE_DEBUG,
+  LOG (GNUNET_ERROR_TYPE_INFO,
        _("Shutting down plugin `%s'\n"),
        plugin->name);
 
-  if (GNUNET_SCHEDULER_NO_TASK != plugin->notify_ext_task)
+  if (NULL != plugin->notify_ext_task)
   {
     GNUNET_SCHEDULER_cancel (plugin->notify_ext_task);
-    plugin->notify_ext_task = GNUNET_SCHEDULER_NO_TASK;
+    plugin->notify_ext_task = NULL;
   }
 
   if (NULL != plugin->ext_addr)
@@ -3157,16 +3188,16 @@ LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
     MHD_stop_daemon (plugin->server_v6);
     plugin->server_v6 = NULL;
   }
-  if (GNUNET_SCHEDULER_NO_TASK != plugin->server_v4_task)
+  if (NULL != plugin->server_v4_task)
   {
     GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
-    plugin->server_v4_task = GNUNET_SCHEDULER_NO_TASK;
+    plugin->server_v4_task = NULL;
   }
 
-  if (GNUNET_SCHEDULER_NO_TASK != plugin->server_v6_task)
+  if (NULL != plugin->server_v6_task)
   {
     GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
-    plugin->server_v6_task = GNUNET_SCHEDULER_NO_TASK;
+    plugin->server_v6_task = NULL;
   }
 #if BUILD_HTTPS
   GNUNET_free_non_null (plugin->crypto_init);
@@ -3174,7 +3205,7 @@ LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
   GNUNET_free_non_null (plugin->key);
 #endif
   GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
-                                         &destroy_session_cb,
+                                         &destroy_session_shutdown_cb,
                                          plugin);
   GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
   plugin->sessions = NULL;
@@ -3196,18 +3227,15 @@ LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
 
 
 /**
- * Function called by the pretty printer for the resolved address for
- * each human-readable address obtained.  The callback can be called
- * several times. The last invocation must be with a @a address of
- * NULL and a @a res of #GNUNET_OK.  Thus, to indicate conversion
- * errors, the callback might be called first with @a address NULL and
- * @a res being #GNUNET_SYSERR.  In that case, there must still be a
- * subsequent call later with @a address NULL and @a res #GNUNET_OK.
+ * Function called for a quick conversion of the binary address to
+ * a numeric address.  Note that the caller must not free the
+ * address and that the next call to this function is allowed
+ * to override the address again.
  *
- * @param cls closure
- * @param address one of the names for the host, NULL on last callback
- * @param res #GNUNET_OK if conversion was successful, #GNUNET_SYSERR on failure,
- *      #GNUNET_OK on last callback
+ * @param cls unused
+ * @param addr binary address
+ * @param addrlen length of the address
+ * @return string representing the same address
  */
 static const char *
 http_server_plugin_address_to_string (void *cls,
@@ -3223,15 +3251,33 @@ http_server_plugin_address_to_string (void *cls,
 /**
  * Function obtain the network type for a session
  *
- * @param cls closure ('struct HTTP_Server_Plugin*')
+ * @param cls closure (`struct HTTP_Server_Plugin *`)
  * @param session the session
  * @return the network type in HBO or #GNUNET_SYSERR
  */
 static enum GNUNET_ATS_Network_Type
 http_server_plugin_get_network (void *cls,
-                                struct Session *session)
+                                struct GNUNET_ATS_Session *session)
 {
-  return ntohl (session->ats_address_network_type);
+  return session->scope;
+}
+
+
+/**
+ * Function obtain the network type for an address.
+ *
+ * @param cls closure (`struct Plugin *`)
+ * @param address the address
+ * @return the network type
+ */
+static enum GNUNET_ATS_Network_Type
+http_server_plugin_get_network_for_address (void *cls,
+                                            const struct GNUNET_HELLO_Address *address)
+{
+  struct HTTP_Server_Plugin *plugin = cls;
+
+  return http_common_get_network_for_address (plugin->env,
+                                              address);
 }
 
 
@@ -3248,21 +3294,21 @@ http_server_plugin_get_network (void *cls,
 static void
 http_server_plugin_update_inbound_delay (void *cls,
                                          const struct GNUNET_PeerIdentity *peer,
-                                         struct Session *s,
+                                         struct GNUNET_ATS_Session *session,
                                          struct GNUNET_TIME_Relative delay)
 {
-  s->next_receive = GNUNET_TIME_relative_to_absolute (delay);
+  session->next_receive = GNUNET_TIME_relative_to_absolute (delay);
   LOG (GNUNET_ERROR_TYPE_DEBUG,
        "New inbound delay %s\n",
        GNUNET_STRINGS_relative_time_to_string (delay,
                                                GNUNET_NO));
-  if (GNUNET_SCHEDULER_NO_TASK != s->recv_wakeup_task)
+  if (NULL != session->recv_wakeup_task)
   {
-    GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
-    s->recv_wakeup_task
+    GNUNET_SCHEDULER_cancel (session->recv_wakeup_task);
+    session->recv_wakeup_task
       = GNUNET_SCHEDULER_add_delayed (delay,
                                       &server_wake_up,
-                                      s);
+                                      session);
   }
 }
 
@@ -3273,7 +3319,7 @@ http_server_plugin_update_inbound_delay (void *cls,
  *
  * @param cls the `struct Plugin` with the monitor callback (`sic`)
  * @param peer peer we send information about
- * @param value our `struct Session` to send information about
+ * @param value our `struct GNUNET_ATS_Session` to send information about
  * @return #GNUNET_OK (continue to iterate)
  */
 static int
@@ -3282,11 +3328,11 @@ send_session_info_iter (void *cls,
                         void *value)
 {
   struct HTTP_Server_Plugin *plugin = cls;
-  struct Session *session = value;
+  struct GNUNET_ATS_Session *session = value;
 
   notify_session_monitor (plugin,
                           session,
-                          GNUNET_TRANSPORT_SS_UP);
+                          GNUNET_TRANSPORT_SS_INIT);
   return GNUNET_OK;
 }
 
@@ -3351,6 +3397,7 @@ LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
   plugin->env = env;
   plugin->sessions = GNUNET_CONTAINER_multipeermap_create (128,
                                                            GNUNET_YES);
+
   api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
   api->cls = plugin;
   api->send = &http_server_plugin_send;
@@ -3364,6 +3411,7 @@ LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
   api->string_to_address = &http_common_plugin_string_to_address;
   api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
   api->get_network = &http_server_plugin_get_network;
+  api->get_network_for_address = &http_server_plugin_get_network_for_address;
   api->update_session_timeout = &http_server_plugin_update_session_timeout;
   api->update_inbound_delay = &http_server_plugin_update_inbound_delay;
   api->setup_monitor = &http_server_plugin_setup_monitor;
@@ -3375,6 +3423,21 @@ LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
   plugin->protocol = "http";
 #endif
 
+  if (GNUNET_YES ==
+      GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+                                            plugin->name,
+                                            "TCP_STEALTH"))
+  {
+#ifdef TCP_STEALTH
+    plugin->options |= HTTP_OPTIONS_TCP_STEALTH;
+#else
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                _("TCP_STEALTH not supported on this platform.\n"));
+    LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
+    return NULL;
+#endif
+  }
+
   /* Compile URL regex */
   if (regcomp(&plugin->url_regex,
               URL_REGEX,