*/
struct MeshConnection;
+/**
+ * Handle for messages queued but not yet sent.
+ */
+struct MeshConnectionQueue;
+
#include "mesh_path.h"
#include "gnunet-service-mesh_channel.h"
#include "gnunet-service-mesh_peer.h"
+/**
+ * Callback called when a queued message is sent.
+ *
+ * @param cls Closure.
+ * @param c Connection this message was on.
+ * @param type Type of message sent.
+ * @param fwd Was this a FWD going message?
+ * @param size Size of the message.
+ */
+typedef void (*GMC_sent) (void *cls,
+ struct MeshConnection *c,
+ struct MeshConnectionQueue *q,
+ uint16_t type, int fwd, size_t size);
+
/**
* Core handler for connection creation.
*
* the direction and the position of the peer.
*
* @param c Which connection to send the hop-by-hop ACK.
- * @param fwd Is this a fwd ACK? (will go dest->root)
+ * @param fwd Is this a fwd ACK? (will go dest->root).
+ * @param force Send the ACK even if suboptimal (e.g. requested by POLL).
*/
void
-GMC_send_ack (struct MeshConnection *c, int fwd);
+GMC_send_ack (struct MeshConnection *c, int fwd, int force);
/**
* Initialize the connections subsystem
int
GMC_is_sendable (struct MeshConnection *c, int fwd);
+/**
+ * Cancel a previously sent message while it's in the queue.
+ *
+ * ONLY can be called before the continuation given to the send function
+ * is called. Once the continuation is called, the message is no longer in the
+ * queue.
+ *
+ * @param q Handle to the queue.
+ */
+void
+GMC_cancel (struct MeshConnectionQueue *q);
+
/**
* Sends an already built message on a connection, properly registering
* all used resources.
* If message is not hop-by-hop, decrements TTL of copy.
* @param c Connection on which this message is transmitted.
* @param fwd Is this a fwd message?
+ * @param cont Continuation called once message is sent. Can be NULL.
+ * @param cont_cls Closure for @c cont.
+ *
+ * @return Handle to cancel the message before it's sent.
+ * NULL on error or if @c cont is NULL.
+ * Invalid on @c cont call.
*/
-void
+struct MeshConnectionQueue *
GMC_send_prebuilt_message (const struct GNUNET_MessageHeader *message,
- struct MeshConnection *c,
- int fwd);
+ struct MeshConnection *c, int fwd,
+ GMC_sent cont, void *cont_cls);
/**
* Sends a CREATE CONNECTION message for a path to a peer.