Added creation and periodic update of a file called "status" in the home directory that contains peer link status. Useful for debugging and statistics. Send it SIGHUP to force an update now. Otherwise it updates every 120 seconds.

node/Topology.hpp

@@ -28,6 +28,8 @@
 #ifndef _ZT_TOPOLOGY_HPP
 #define _ZT_TOPOLOGY_HPP
 
+#include <stdio.h>
+#include <string.h>
 #include <map>
 #include <set>
 #include <list>
@@ -292,6 +294,35 @@ public:
 		std::vector< SharedPtr<Peer> > &_v;
 	};
 
+	/**
+	 * Dump peer I/O statistics to an open FILE (for status reporting and debug)
+	 */
+	class DumpPeerStatistics
+	{
+	public:
+		DumpPeerStatistics(FILE *out) :
+			_out(out),
+			_now(Utils::now())
+		{
+			fprintf(_out,"Peer       Direct IPv4           Direct IPv6                                         Latency(ms)"ZT_EOL_S);
+		}
+
+		inline void operator()(Topology &t,const SharedPtr<Peer> &p)
+		{
+			InetAddress v4(p->ipv4ActivePath(_now));
+			InetAddress v6(p->ipv6ActivePath(_now));
+			fprintf(_out,"%-10s %-21s %-51s %u"ZT_EOL_S,
+				p->address().toString().c_str(),
+				((v4) ? v4.toString().c_str() : "(none)"),
+				((v6) ? v6.toString().c_str() : "(none)"),
+				p->latency());
+		}
+
+	private:
+		FILE *_out;
+		uint64_t _now;
+	};
+
 protected:
 	virtual void main()
 		throw();