[GNUnet-SVN] r10909 - gnunet/src/transport

[gnunet]

Author: grothoff
Date: 2010-04-14 21:08:44 +0200 (Wed, 14 Apr 2010)
New Revision: 10909

Modified:
   gnunet/src/transport/gnunet-service-transport.c
Log:
work in progress

Modified: gnunet/src/transport/gnunet-service-transport.c
===================================================================
--- gnunet/src/transport/gnunet-service-transport.c     2010-04-14 18:58:07 UTC 
(rev 10908)
+++ gnunet/src/transport/gnunet-service-transport.c     2010-04-14 19:08:44 UTC 
(rev 10909)
@@ -24,7 +24,6 @@
  * @author Christian Grothoff
  *
  * TODO:
- * - Need to defer forwarding messages until after CONNECT message
  * - CHECK that 'address' being NULL in 'struct ForeignAddressList' is
  *   tolerated in the code everywhere (could not happen before)
  *
@@ -453,6 +452,14 @@
   struct MessageQueue *messages_tail;
 
   /**
+   * Buffer for at most one payload message used when we receive
+   * payload data before our PING-PONG has succeeded.  We then
+   * store such messages in this intermediary buffer until the
+   * connection is fully up.  
+   */
+  struct GNUNET_MessageHeader *pre_connect_message_buffer;
+
+  /**
    * Context for peerinfo iteration.
    * NULL after we are done processing peerinfo's information.
    */
@@ -2474,7 +2481,83 @@
 }
 
 
+
+
 /**
+ * Function that will be called if we receive some payload
+ * from another peer.
+ *
+ * @param message the payload
+ * @param n peer who claimed to be the sender
+ */
+static void
+handle_payload_message (const struct GNUNET_MessageHeader *message,
+                       struct NeighbourList *n)
+{
+  struct InboundMessage *im;
+  struct TransportClient *cpos;
+  uint16_t msize;
+
+  msize = ntohs (message->size);
+  if (n->received_pong == GNUNET_NO)
+    {
+      GNUNET_free_non_null (n->pre_connect_message_buffer);
+      n->pre_connect_message_buffer = GNUNET_malloc (msize);
+      memcpy (n->pre_connect_message_buffer, message, msize);
+      return;
+    }
+#if DEBUG_TRANSPORT
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+             "Received message of type %u from `%4s', sending to all 
clients.\n",
+             ntohs (message->type), 
+             GNUNET_i2s (&n->id));
+#endif
+  if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
+                                                     (ssize_t) msize))
+    {
+      n->quota_violation_count++;
+#if DEBUG_TRANSPORT
+      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,                       
+                 "Bandwidth quota (%u b/s) violation detected (total of 
%u).\n", 
+                 n->in_tracker.available_bytes_per_s__,
+                 n->quota_violation_count);
+#endif
+      /* Discount 32k per violation */
+      GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
+                                       - 32 * 1024);           
+    }
+  else 
+    {
+      if (n->quota_violation_count > 0)
+       {
+         /* try to add 32k back */
+         GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
+                                           32 * 1024);
+         n->quota_violation_count--;
+       }
+    }
+  GNUNET_STATISTICS_update (stats,
+                           gettext_noop ("# payload received from other 
peers"),
+                           msize,
+                           GNUNET_NO);
+  /* transmit message to all clients */
+  im = GNUNET_malloc (sizeof (struct InboundMessage) + msize);
+  im->header.size = htons (sizeof (struct InboundMessage) + msize);
+  im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
+  im->latency = GNUNET_TIME_relative_hton (n->latency);
+  im->peer = n->id;
+  memcpy (&im[1], message, msize);
+  cpos = clients;
+  while (cpos != NULL)
+    {
+      transmit_to_client (cpos, &im->header, GNUNET_YES);
+      cpos = cpos->next;
+    }
+  GNUNET_free (im);
+}
+
+
+/**
  * Iterator over hash map entries.  Checks if the given validation
  * entry is for the same challenge as what is given in the PONG.
  *
@@ -2497,6 +2580,7 @@
   struct GNUNET_PeerIdentity target;
   struct NeighbourList *n;
   struct ForeignAddressList *fal;
+  struct GNUNET_MessageHeader *prem;
 
   if (ve->challenge != challenge)
     return GNUNET_YES;
@@ -2565,6 +2649,12 @@
        {
          n->received_pong = GNUNET_YES;
          notify_clients_connect (&target, n->latency, n->distance);
+         if (NULL != (prem = n->pre_connect_message_buffer))
+           {
+             n->pre_connect_message_buffer = NULL;
+             handle_payload_message (prem, n);
+             GNUNET_free (prem);
+           }
        }
       if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
        {
@@ -3106,6 +3196,7 @@
                            gettext_noop ("# active neighbours"),
                            -1,
                            GNUNET_NO);
+  GNUNET_free_non_null (n->pre_connect_message_buffer);
   GNUNET_free (n);
 }
 
@@ -3257,8 +3348,6 @@
 {
   struct TransportPlugin *plugin = cls;
   struct ReadyList *service_context;
-  struct TransportClient *cpos;
-  struct InboundMessage *im;
   struct ForeignAddressList *peer_address;
   uint16_t msize;
   struct NeighbourList *n;
@@ -3339,53 +3428,8 @@
          handle_pong (plugin, message, peer, sender_address, 
sender_address_len);
          break;
        default:
-#if DEBUG_TRANSPORT
-         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                     "Received message of type %u from `%4s', sending to all 
clients.\n",
-                     ntohs (message->type), GNUNET_i2s (peer));
-#endif
-         if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
-                                                             (ssize_t) msize))
-           {
-             n->quota_violation_count++;
-#if DEBUG_TRANSPORT
-             GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,                        
-                         "Bandwidth quota (%u b/s) violation detected (total 
of %u).\n", 
-                         n->in_tracker.available_bytes_per_s__,
-                         n->quota_violation_count);
-#endif
-             /* Discount 32k per violation */
-             GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
-                                               - 32 * 1024);           
-           }
-         else 
-           {
-             if (n->quota_violation_count > 0)
-               {
-                 /* try to add 32k back */
-                 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
-                                                   32 * 1024);
-                 n->quota_violation_count--;
-               }
-           }
-         GNUNET_STATISTICS_update (stats,
-                                   gettext_noop ("# payload received from 
other peers"),
-                                   msize,
-                                   GNUNET_NO);
-         /* transmit message to all clients */
-         im = GNUNET_malloc (sizeof (struct InboundMessage) + msize);
-         im->header.size = htons (sizeof (struct InboundMessage) + msize);
-         im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
-         im->latency = GNUNET_TIME_relative_hton (n->latency);
-         im->peer = *peer;
-         memcpy (&im[1], message, msize);
-         cpos = clients;
-         while (cpos != NULL)
-           {
-             transmit_to_client (cpos, &im->header, GNUNET_YES);
-             cpos = cpos->next;
-           }
-         GNUNET_free (im);
+         handle_payload_message (message, n);
+         break;
        }
     }  
   ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);