diff --git a/src/osysmon.h b/src/osysmon.h
index 735b11e..df8bf8d 100644
--- a/src/osysmon.h
+++ b/src/osysmon.h
@@ -9,6 +9,7 @@
 #include "value_node.h"
 
 struct rtnl_client_state;
+struct ping_state;
 
 struct osysmon_state {
 	struct rtnl_client_state *rcs;
@@ -18,6 +19,7 @@
 	struct llist_head netdevs;
 	/* list of 'struct osysmon_file' */
 	struct llist_head files;
+	struct ping_state *pings;
 };
 
 extern struct osysmon_state *g_oss;
@@ -28,6 +30,7 @@
 	CTRL_CLIENT_NODE = _LAST_OSMOVTY_NODE + 1,
 	CTRL_CLIENT_GETVAR_NODE,
 	NETDEV_NODE,
+	PING_NODE,
 };
 
 
@@ -42,5 +45,8 @@
 int osysmon_sysinfo_init();
 int osysmon_sysinfo_poll(struct value_node *parent);
 
+int osysmon_ping_init();
+int osysmon_ping_poll(struct value_node *parent);
+
 int osysmon_file_init();
 int osysmon_file_poll(struct value_node *parent);