Initial commit

node_modules/ping/lib/ping-pcap.js

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+/* eslint-disable */
+
+/** 
+* LICENSE MIT
+* (C) Daniel Zelisko
+* http://github.com/danielzzz/node-ping
+*
+* A poor man's ping for node.js
+* It uses UDP_scanning (as node is not able to generate iCPM packets)
+* http://en.wikipedia.org/wiki/Port_scanner#UDP_scanning
+* it may not work correct for hosts that silently drop UDP traffic on their firewall
+* you need at pcap version 0.1.9 or higher
+* 
+*/
+
+var sys = require("util"),
+pcap = require('pcap');
+    
+var addr = process.argv[3] || 'localhost';
+setInterval(function() {probe(addr)}, 1000);
+
+
+function probe(addr) {
+    sys.puts('sending a probe to ' + addr);
+    var dgram = require('dgram');
+    var message = new Buffer("Some bytes");
+    var client = dgram.createSocket("udp4");
+    client.send(message, 0, message.length, 21111, addr);
+    client.close(); 
+}
+
+// create a pcap session
+pcap_session = pcap.createSession(process.argv[2] || 'eth0', "");
+
+
+// listen for packets, decode them, and feed the simple printer
+pcap_session.addListener('packet', function (raw_packet) {
+    var packet = pcap.decode.packet(raw_packet);
+    if (packet.link && packet.link.ip && packet.link.ip.saddr==addr) {
+        packet.link && packet.link.ip && sys.puts(packet.link.ip.saddr + " is alive");
+    }
+});
+
+//-------- example ------------------------
+
+