From e36d8124e142f27d99d16575b0122dc4401794cc Mon Sep 17 00:00:00 2001
From: Marcel Holtmann <marcel@holtmann.org>
Date: Mon, 14 Sep 2009 06:01:38 -0700
Subject: Add support for monitoring operation state from plugins

---
 include/rtnl.h |  8 ++++++++
 src/rtnl.c     | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/include/rtnl.h b/include/rtnl.h
index 01f4d2f8..1c3bd048 100644
--- a/include/rtnl.h
+++ b/include/rtnl.h
@@ -32,11 +32,19 @@ extern "C" {
  * @short_description: Functions for registering RTNL modules
  */
 
+
+typedef void (* connman_rtnl_operstate_cb_t) (unsigned char operstate,
+							void *user_data);
+
 typedef void (* connman_rtnl_link_cb_t) (unsigned flags, unsigned change,
 							void *user_data);
 
+unsigned int connman_rtnl_add_operstate_watch(int index,
+			connman_rtnl_operstate_cb_t callback, void *user_data);
+
 unsigned int connman_rtnl_add_newlink_watch(int index,
 			connman_rtnl_link_cb_t callback, void *user_data);
+
 void connman_rtnl_remove_watch(unsigned int id);
 
 #define CONNMAN_RTNL_PRIORITY_LOW      -100
diff --git a/src/rtnl.c b/src/rtnl.c
index 332d67ae..6d2efa24 100644
--- a/src/rtnl.c
+++ b/src/rtnl.c
@@ -43,6 +43,7 @@
 struct watch_data {
 	unsigned int id;
 	int index;
+	connman_rtnl_operstate_cb_t operstate;
 	connman_rtnl_link_cb_t newlink;
 	void *user_data;
 };
@@ -50,6 +51,45 @@ struct watch_data {
 static GSList *watch_list = NULL;
 static unsigned int watch_id = 0;
 
+/**
+ * connman_rtnl_add_operstate_watch:
+ * @index: network device index
+ * @callback: callback function
+ * @user_data: callback data;
+ *
+ * Add a new RTNL watch for operation state events
+ *
+ * Returns: %0 on failure and a unique id on success
+ */
+unsigned int connman_rtnl_add_operstate_watch(int index,
+			connman_rtnl_operstate_cb_t callback, void *user_data)
+{
+	struct watch_data *watch;
+
+	watch = g_try_new0(struct watch_data, 1);
+	if (watch == NULL)
+		return 0;
+
+	watch->id = ++watch_id;
+	watch->index = index;
+
+	watch->operstate = callback;
+	watch->user_data = user_data;
+
+	watch_list = g_slist_prepend(watch_list, watch);
+
+	DBG("id %d", watch->id);
+
+	if (callback) {
+		unsigned char operstate = 0;
+
+		if (operstate > 0)
+			callback(operstate, user_data);
+	}
+
+	return watch->id;
+}
+
 /**
  * connman_rtnl_add_newlink_watch:
  * @index: network device index
@@ -239,7 +279,7 @@ static void process_newlink(unsigned short type, int index, unsigned flags,
 	extract_link(msg, bytes, &ifname, &operstate);
 
 	if (operstate != 0xff)
-		connman_info("%s {state} index %d operstate %d <%s>",
+		connman_info("%s {newlink} index %d operstate %d <%s>",
 						ifname, index, operstate,
 						operstate2str(operstate));
 
@@ -256,6 +296,9 @@ static void process_newlink(unsigned short type, int index, unsigned flags,
 		if (watch->index != index)
 			continue;
 
+		if (operstate != 0xff && watch->operstate)
+			watch->operstate(operstate, watch->user_data);
+
 		if (watch->newlink)
 			watch->newlink(flags, change, watch->user_data);
 	}
@@ -264,8 +307,27 @@ static void process_newlink(unsigned short type, int index, unsigned flags,
 static void process_dellink(unsigned short type, int index, unsigned flags,
 			unsigned change, struct ifinfomsg *msg, int bytes)
 {
+	unsigned char operstate = 0xff;
+	const char *ifname = NULL;
 	GSList *list;
 
+	extract_link(msg, bytes, &ifname, &operstate);
+
+	if (operstate != 0xff)
+		connman_info("%s {dellink} index %d operstate %d <%s>",
+						ifname, index, operstate,
+						operstate2str(operstate));
+
+	for (list = watch_list; list; list = list->next) {
+		struct watch_data *watch = list->data;
+
+		if (watch->index != index)
+			continue;
+
+		if (operstate != 0xff && watch->operstate)
+			watch->operstate(operstate, watch->user_data);
+	}
+
 	for (list = rtnl_list; list; list = list->next) {
 		struct connman_rtnl *rtnl = list->data;
 
-- 
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