--- /dev/null
+var readline = require('readline');
+var net = require('net');
+
+
+
+// ---- vars
+
+var asPaths = new Array();
+var readyToSend = false;
+var currentPrompt;
+var rl;
+var nCons = 0;
+var nSent = 0;
+var myAS;
+var myIP;
+var server;
+var cState = "starting";
+var currentIPa = 1;
+var currentIPb = 0;
+var currentIPc = 0;
+
+
+// ---- vars
+
+
+if(typeof process.argv[2] == "undefined") {
+ usage();
+}
+
+if(typeof process.argv[3] == "undefined") {
+ usage();
+}
+
+function usage() {
+ console.log("Usage: "+process.argv[1]+" MyAS MyIP");
+ process.exit(1);
+}
+
+
+
+
+
+// ----------- startup
+
+myAS = process.argv[2];
+myIP = process.argv[3];
+
+
+startCLI();
+doPrompt();
+createAsPathArray(1048576);
+startServer();
+cState = "idle";
+doPrompt();
+
+// ----------- startup
+
+
+
+
+
+
+
+
+
+
+// --------- CLI
+
+function updatePrompt() {
+ currentPrompt = "("+myAS+"/"+myIP+") "+cState+":"+nCons+"/"+nSent+" ("+currentIPa+"."+currentIPb+"."+currentIPc+") > ";
+}
+
+function startCLI() {
+ currentPrompt = "("+myAS+"/"+myIP+") starting... > ";
+
+ rl = readline.createInterface({
+ input: process.stdin,
+ output: process.stdout
+ });
+
+ rl.on('line', function (cmd) {
+ switch(cmd) {
+
+ case "?":
+ case "help":
+ case "h":
+ printCLIUsage();
+ break;
+ case "s":
+ printStatus();
+ break;
+ case "u":
+ startUpdates();
+ break;
+ case "p":
+ stopUpdates();
+ break;
+ case "q":
+ case "quit":
+ case "end":
+ rl.close();
+ process.exit(0);
+ break;
+ case "":
+ break;
+ }
+
+ rl.setPrompt(currentPrompt);
+ rl.prompt();
+ });
+}
+
+
+
+function doPrompt() {
+ updatePrompt();
+ rl.setPrompt(currentPrompt);
+ rl.prompt();
+}
+
+function printCLIUsage() {
+ console.log("Help");
+ console.log("\th[elp],? - this help menu");
+ console.log("\tu - start sending route updates to connected peers");
+ console.log("\tp - pause sending route updates to connected peers");
+ console.log("\ts - status");
+ console.log("\tq[uit],exit,end - Quit");
+ console.log("Prompt layout");
+ console.log("\t(AS/IP) state:connections/updates sent");
+}
+
+// ------------- CLI
+
+
+
+
+
+
+
+
+
+
+
+
+
+//------------- network
+
+function startUpdates() {
+
+}
+
+function serverconnection(c) {
+
+ scon = c;
+
+ c.on("end", function() {
+ //console.log("Server disconnected");
+ nCons--;
+ if(nCons == 0) {
+ cState = "idle";
+ doPrompt();
+ }
+ });
+
+ c.on("data", function(buffer) {
+ parseBuffer(buffer, c);
+ });
+
+ cState = "connected";
+ nCons++;
+ doPrompt();
+
+ //c.write("hello\r\n");
+}
+
+
+function startServer() {
+ server = net.createServer(serverconnection);
+
+ server.listen(10179, function() {
+ //console.log("LOG: Server bound");
+ doPrompt();
+ });
+
+}
+
+//------------- network
+
+
+
+
+
+
+
+
+
+
+// -------------- BGP
+
+function getNextIP() {
+ // split into octets
+ //var currentIPa = 1;
+ //var currentIPb = 0;
+ //var currentIPc = 0;
+
+ currentIPc++;
+ if(currentIPc > 254) {
+
+ currentIPb++;
+ if(currentIPb == 168 && currentIPa == 192) currentIPb++;
+ if(currentIPb > 254) {
+ currentIPa++;
+
+ // dont publish bogons or 127
+ if(currentIPa == 10) currentIPa++;
+ if(currentIPa == 127) currentIPa++;
+ if(currentIPa == 128) currentIPa++;
+ }
+ }
+
+
+ //console.log("created "+a+"."+b+"."+c+" from "+i);
+ return currentIPa+"."+currentIPb+"."+currentIPc;
+
+}
+
+function getASPath() {
+
+}
+
+function constructUpdateMessage(n_up, myas, myip) {
+ var bsize = 0;
+
+ var aspath = getASPath();
+
+ // first the header components
+ bsize += 16;
+
+ // next the length component
+ bsize += 2;
+
+ // next the n unfeasible
+ bsize += 2;
+
+ // next, path attr length
+ bsize += 2;
+
+
+ // now we begin the path attrs
+ // first origin - simple
+ var aspathn = 4;
+
+ // next as path - hard, flag + type + len + aspath segment
+ aspathn += 3;
+
+ // as path segment size = 1 (type), + 1 (len) + as's*2
+ var aspathlen = ((aspath.length+1)*2)+1+1;
+ aspathn += aspathlen;
+
+ // now next hop attrs = flag (1) + type (1) + len (1) + octets (4);
+ aspathn += 7;
+ bsize += aspathn;
+
+ // now nlri = prefix len (1) + prefix fixed in our case (3)
+ bsize += 4*n_up;
+
+ // fudge
+ bsize+=1;
+
+ //console.log("size: " + bsize + ", an: " + aspathn + " al:" + aspathlen);
+ var buf = new Buffer(bsize);
+ var bp = 0;
+
+ // now lets create the buffer
+ buf.fill(0xff, bp, bp+16);
+ bp+=16;
+ buf.writeUInt16BE(bsize, bp);
+ bp+=2;
+ buf.writeUInt8(2, bp);
+ bp++;
+ buf.writeUInt16BE(0, bp);
+ bp+=2;
+ buf.writeUInt16BE(aspathn, bp);
+ bp+=2;
+
+ // path attr
+ // origin
+ buf.writeUInt8(0x40, bp);
+ bp++;
+ buf.writeUInt8(1, bp);
+ bp++;
+ buf.writeUInt8(1, bp);
+ bp++;
+ buf.writeUInt8(0, bp);
+ bp++;
+
+ // as path
+ buf.writeUInt8(0x40, bp);
+ bp++;
+ buf.writeUInt8(2, bp);
+ bp++;
+ buf.writeUInt8(aspathlen, bp);
+ bp++;
+ buf.writeUInt8(2, bp);
+ bp++;
+ buf.writeUInt8(aspath.length+1, bp);
+ bp++;
+ //console.log("writing in my aspath: "+myas);
+ buf.writeUInt16BE(myas, bp);
+ bp+=2;
+ aspath.forEach(function (ed) {
+ //console.log("writing in aspath: "+ed);
+ buf.writeUInt16BE(ed, bp);
+ bp+=2;
+ });
+
+ // next hop
+ buf.writeUInt8(0x40, bp);
+ bp++;
+ buf.writeUInt8(3, bp);
+ bp++;
+ buf.writeUInt8(4, bp);
+ bp++;
+ myip.split(".").forEach(function (ed) {
+ //console.log("writing in next hop info: " + ed);
+ buf.writeUInt8(parseInt(ed), bp);
+ bp++;
+ });
+
+ // last, nlri
+ for(var nn=0; nn < n_up; nn++) {
+ buf.writeUInt8(24, bp);
+ bp++;
+ var ip = getNextIP();
+ ip.split(".").forEach(function(ed){
+ //console.log("Writing in nlri: "+ed);
+ buf.writeUInt8(parseInt(ed), bp);
+ bp++;
+ });
+ }
+
+ console.log("buf is:");
+ console.log(buf);
+ console.log(buf.length);
+
+ return buf;
+}
+
+function createAsPathArray(size) {
+ for(var i=0; i<size; i++) {
+ asPaths[i] = createaspath(i);
+ }
+}
+
+
+function createaspath(i) {
+ var n=(i%5)+2;
+ var as = 1024;
+ var ret = new Array();
+
+ for(var t=0; t<n; t++) {
+ i = i << 1;
+ as = 1024 + (i%30000);
+ ret[t] = as;
+ }
+ return ret;
+}
+
+function parseBuffer(b, c) {
+ var len = b.readUInt16BE(16);
+ var type = b.readUInt8(18);
+
+ //console.log("got input: " + len + ", type: " + type);
+
+ if(type == 1) {
+ var vers = b.readUInt8(19);
+ var as = b.readUInt16BE(20);
+ var ht = b.readUInt16BE(22);
+ var ot1 = b.readUInt8(24);
+ var ot2 = b.readUInt8(25);
+ var ot3 = b.readUInt8(26);
+ var ot4 = b.readUInt8(27);
+ var opl = b.readUInt8(28);
+ console.log("got open type, vers: "+vers+", as: " + as);
+ console.log("ht: " + ht + ", id: "+ot1+"."+ot2+"."+ot3+"."+ot4+", opl: "+opl);
+
+
+ console.log("sending our open type");
+ var out = new Buffer(29);
+
+
+ out.fill(0xff, 0, 16);
+ out.writeUInt16BE(29, 16);
+ out.writeUInt8(1, 18);
+ out.writeUInt8(4, 19);
+ out.writeUInt16BE(myas, 20);
+ out.writeUInt16BE(90, 22);
+ out.writeUInt8(10, 24);
+ out.writeUInt8(99, 25);
+ out.writeUInt8(99, 26);
+ out.writeUInt8(1,27);
+ out.writeUInt8(0,28);
+
+ c.write(out);
+ } else if(type == 4) {
+ console.log("writing keepalive - exact as sent");
+ c.write(b);
+ readyToSend = true;
+ //if(updateSent ==0) beginUpdateSend(c);
+ } else if(type == 2) {
+ console.log("got update...");
+ if(updateSent ==0) beginUpdateSend(c);
+ } else {
+ console.log("sending end...");
+ c.end();
+ }
+
+
+}
+
+//-------------- BGP
\ No newline at end of file
projects / random_node_code.git / blobdiff