[GNUnet-SVN] r16373 - gnunet/src/mesh

[gnunet]

Author: bartpolot
Date: 2011-08-04 16:35:15 +0200 (Thu, 04 Aug 2011)
New Revision: 16373

Modified:
   gnunet/src/mesh/gnunet-service-mesh.c
Log:
Changed how messages are sent to clients to use Notif Context


Modified: gnunet/src/mesh/gnunet-service-mesh.c
===================================================================
--- gnunet/src/mesh/gnunet-service-mesh.c       2011-08-04 14:26:15 UTC (rev 
16372)
+++ gnunet/src/mesh/gnunet-service-mesh.c       2011-08-04 14:35:15 UTC (rev 
16373)
@@ -56,6 +56,7 @@
 
 
 #define CORE_QUEUE_SIZE         10
+#define LOCAL_QUEUE_SIZE        100
 #define REFRESH_PATH_TIME       GNUNET_TIME_relative_multiply(\
                                     GNUNET_TIME_UNIT_SECONDS,\
                                     300)
@@ -354,8 +355,8 @@
 /**
  * All the clients
  */
-static struct MeshClient                *clients;
-static struct MeshClient                *clients_tail;
+static struct MeshClient                        *clients;
+static struct MeshClient                        *clients_tail;
 
 /**
  * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
@@ -370,27 +371,32 @@
 /**
  * Handle to communicate with core
  */
-static struct GNUNET_CORE_Handle        *core_handle;
+static struct GNUNET_CORE_Handle                *core_handle;
 
 /**
  * Handle to use DHT
  */
-static struct GNUNET_DHT_Handle         *dht_handle;
+static struct GNUNET_DHT_Handle                 *dht_handle;
 
 /**
  * Handle to server
  */
-static struct GNUNET_SERVER_Handle      *server_handle;
+static struct GNUNET_SERVER_Handle              *server_handle;
 
 /**
+ * Notification context, to send messages to local clients
+ */
+static struct GNUNET_SERVER_NotificationContext *nc;
+
+/**
  * Local peer own ID (memory efficient handle)
  */
-static GNUNET_PEER_Id                   myid;
+static GNUNET_PEER_Id                           myid;
 
 /**
  * Tunnel ID for the next created tunnel (global tunnel number)
  */
-static MESH_TunnelNumber                next_tid;
+static MESH_TunnelNumber                        next_tid;
 
 
/******************************************************************************/
 /******************      GENERAL HELPER FUNCTIONS      
************************/
@@ -993,30 +999,29 @@
 
 
 /**
- * Function called to notify a client about the socket
- * begin ready to queue more data.  "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
- *
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * Send the message to all clients that have subscribed to its type
+ * 
+ * @param msg Pointer to the message itself
+ * @return number of clients this message was sent to
  */
-size_t
-send_client_raw (void *cls, size_t size, void *buf)
+static unsigned int
+send_subscribed_clients (struct GNUNET_MessageHeader *msg)
 {
-    struct GNUNET_MessageHeader *msg = cls;
-    size_t                      msg_size;
+    struct MeshClient   *c;
+    unsigned int        count;
+    uint16_t            type;
 
-    msg_size = ntohs(msg->size);
-    if (msg_size > size) {
-        GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
-                   "deliver to client failed: buffer too small\n");
-        return 0;
+    type = ntohs(msg->type);
+    for (count = 0, c = clients; c != NULL; c = c->next) {
+        if (is_client_subscribed(type, c)) {
+            count++;
+            GNUNET_SERVER_notification_context_unicast(nc,
+                                                       c->handle,
+                                                       msg,
+                                                       GNUNET_YES);
+        }
     }
-    memcpy(buf, cls, msg_size);
-    return msg_size;
+    return count;
 }
 
 
@@ -1243,7 +1248,9 @@
     uint16_t                                    payload_type;
 
     size = ntohs(message->size);
-    if (size < sizeof(struct GNUNET_MESH_DataMessageFromOrigin)) {
+    if (size < sizeof(struct GNUNET_MESH_DataMessageFromOrigin)
+               + sizeof(struct GNUNET_MessageHeader))
+    {
         GNUNET_break(0);
         return GNUNET_OK;
     }
@@ -1260,17 +1267,7 @@
         return GNUNET_OK;
     }
     if (pi->id == myid) {
-        payload_type = ntohs(msg[1].header.type);
-        for (c = clients; NULL != c; c = c->next) {
-            if (is_client_subscribed(payload_type, c)) {
-                /* FIXME copy data to buffer (info), msg will expire */
-                GNUNET_SERVER_notify_transmit_ready(c->handle,
-                    size - sizeof(struct GNUNET_MESH_DataMessageFromOrigin),
-                    GNUNET_TIME_UNIT_FOREVER_REL,
-                    send_client_raw,
-                    &msg[1]);
-            }
-        }
+        send_subscribed_clients((struct GNUNET_MessageHeader *)&msg[1]);
         return GNUNET_OK;
     }
     GNUNET_PEER_resolve(get_first_hop(pi->path), &id);
@@ -1308,7 +1305,6 @@
     struct MeshTunnel                           *t;
     struct MeshClient                           *c;
     struct MeshDataDescriptor                   *dd;
-    struct GNUNET_SERVER_NotificationContext    *nc;
     GNUNET_PEER_Id                              *neighbors;
     size_t                                      size;
     uint16_t                                    type;
@@ -1317,7 +1313,9 @@
 
 
     size = ntohs(message->size);
-    if (size < sizeof(struct GNUNET_MESH_DataMessageMulticast)) {
+    if (size < sizeof(struct GNUNET_MESH_DataMessageMulticast)
+               + sizeof(struct GNUNET_MessageHeader))
+    {
         GNUNET_break_op (0);
         return GNUNET_OK; 
     }
@@ -1325,23 +1323,14 @@
     t = retrieve_tunnel(&msg->oid, ntohl(msg->tid));
 
     if (NULL == t) {
+        /* TODO notify that we dont know that tunnel */
         return GNUNET_OK;
     }
 
     /* Transmit to locally interested clients */
     GNUNET_PEER_resolve(myid, &id);
     if (GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey)) {
-        type = ntohs(msg[1].header.type);
-        nc = GNUNET_SERVER_notification_context_create(server_handle,
-                                                       CORE_QUEUE_SIZE);
-        for (c = clients; c != NULL; c = c->next) {
-            if (is_client_subscribed(type, c)) {
-                GNUNET_SERVER_notification_context_add(nc, c->handle);
-            }
-        }
-        GNUNET_SERVER_notification_context_broadcast(nc, message, GNUNET_NO);
-        GNUNET_SERVER_notification_context_destroy(nc);
-        /* FIXME is this right? better to do like in core retransmissions? */
+        send_subscribed_clients((struct GNUNET_MessageHeader *)&msg[1]);
     }
 
     /* Retransmit to other peers */
@@ -1409,7 +1398,9 @@
     size_t                                      size;
 
     size = ntohs(message->size);
-    if (size < sizeof(struct GNUNET_MESH_DataMessageToOrigin)) {
+    if (size < sizeof(struct GNUNET_MESH_DataMessageToOrigin)
+               + sizeof(struct GNUNET_MessageHeader))
+    {
         GNUNET_break_op (0);
         return GNUNET_OK; // FIXME maybe SYSERR? peer misbehaving?
     }
@@ -1673,6 +1664,7 @@
             c = c->next;
         }
     }
+
     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                "   done!\n");
     return;
@@ -1733,6 +1725,7 @@
 
     GNUNET_CONTAINER_DLL_insert(clients, clients_tail, c);
     c->tunnels = GNUNET_CONTAINER_multihashmap_create(32);
+    GNUNET_SERVER_notification_context_add(nc, client);
 
     GNUNET_SERVER_receive_done(client, GNUNET_OK);
 
@@ -2344,6 +2337,10 @@
         GNUNET_DHT_disconnect (dht_handle);
         dht_handle = NULL;
     }
+    if (nc != NULL) {
+        GNUNET_SERVER_notification_context_destroy(nc);
+        nc = NULL;
+    }
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                 "shut down\n");
 }
@@ -2388,6 +2385,8 @@
 
     tunnels = GNUNET_CONTAINER_multihashmap_create(32);
     peers = GNUNET_CONTAINER_multihashmap_create(32);
+    nc = GNUNET_SERVER_notification_context_create(server_handle,
+                                                       LOCAL_QUEUE_SIZE);
     clients = NULL;
     clients_tail = NULL;