adding notification API to peerinfo

2 files changed, 41 insertions, 0 deletions

diff --git a/src/include/gnunet_peerinfo_service.h b/src/include/gnunet_peerinfo_service.h
index 54fc68033..463131e6a 100644
--- a/src/include/gnunet_peerinfo_service.h
+++ b/src/include/gnunet_peerinfo_service.h
@@ -99,6 +99,41 @@ GNUNET_PEERINFO_for_all (const struct GNUNET_CONFIGURATION_Handle *cfg,
                          void *callback_cls);
 
 
+/**
+ * Handle for notifications about changes to the set of known peers.
+ */
+struct GNUNET_PEERINFO_NotifyContext;
+
+
+/**
+ * Call a method whenever our known information about peers
+ * changes.  Initially calls the given function for all known
+ * peers and then only signals changes.  Note that it is
+ * possible (i.e. on disconnects) that the callback is called
+ * twice with the same peer information.
+ *
+ * @param cfg configuration to use
+ * @param sched scheduler to use
+ * @param callback the method to call for each peer
+ * @param callback_cls closure for callback
+ * @return NULL on error
+ */
+struct GNUNET_PEERINFO_NotifyContext *
+GNUNET_PEERINFO_notify (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                        struct GNUNET_SCHEDULER_Handle *sched,
+                        GNUNET_PEERINFO_Processor callback,
+                        void *callback_cls);
+
+
+/**
+ * Stop notifying about changes.
+ *
+ * @param nc context to stop notifying
+ */
+void
+GNUNET_PEERINFO_notify_cancel (struct GNUNET_PEERINFO_NotifyContext *nc);
+
+
 #if 0                           /* keep Emacsens' auto-indent happy */
 {
 #endif
diff --git a/src/include/gnunet_protocols.h b/src/include/gnunet_protocols.h
index 2fd1c26eb..fc73a57c3 100644
--- a/src/include/gnunet_protocols.h
+++ b/src/include/gnunet_protocols.h
@@ -211,6 +211,12 @@ extern "C"
  */
 #define GNUNET_MESSAGE_TYPE_PEERINFO_INFO_END 36
 
+/**
+ * Start notifying this client about all changes to
+ * the known peers until it disconnects.
+ */
+#define GNUNET_MESSAGE_TYPE_PEERINFO_NOTIFY 37
+
 
 /**
  * Message by which a TCP transport notifies