--- /dev/null
+var myas=1234;
+var myip="10.99.99.1";
+
+var net = require('net');
+
+var scon;
+
+
+function createentry(i) {
+ // split into octets
+ var a = 16;
+ var b = 0;
+
+ // c is easy...
+ var c = (i%255)+1;
+ //console.log("i is now: "+i);
+
+ // if we're above 256....
+ if(i>255) {
+ i = i >> 8;
+ //console.log("i is now: "+i);
+ b = i%255;
+ }
+
+ // if we're still above 256....
+ if(i>255) {
+ i = i >> 8;
+ //console.log("i is now: "+i);
+ a+=((i<<8)%255);
+ }
+ return a+"."+b+"."+c;
+}
+
+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;
+}
+
+console.log("startup....");
+
+
+var num_to_create = 200000;
+
+var data = new Array();
+
+console.log("start construction");
+for(var t=0; t<num_to_create; t++) {
+ var thisdata = new Array();
+ thisdata[0] = createentry(t);
+ //console.log("create entry from "+thisdata[0]+" with " + t);
+ thisdata[1] = createaspath(t);
+ // we construct the update messages while we do this
+
+ // ok, that was dumb
+ thisdata[2] = constructUpdateMessage(thisdata);
+ data[t] = thisdata;
+
+}
+console.log("finish construction");
+
+
+//console.log("data: " + data.toString());
+//console.log("Done!: " + data.length);
+
+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);
+ } else if(type == 2) {
+ console.log("got update...");
+ beginUpdateSend(c);
+ } else {
+ console.log("sending end...");
+ c.end();
+ }
+
+
+}
+
+// this function gets prefix t from data[] and then
+// creates an update message for it
+function constructUpdateMessage(localdata) {
+ //console.log("Construction update for "+t);
+ var bsize = 0;
+
+ //console.log("localdata0: " + localdata[0]);
+ //console.log("localdata1: " + localdata[1]);
+ //console.log("localdata0 - : " + typeof localdata[1]);
+ //console.log("localdata1 - : " + typeof localdata[1]);
+
+ // 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 = ((localdata[1].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;
+
+ // 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(localdata[1].length+1, bp);
+ bp++;
+ //console.log("writing in my aspath: "+myas);
+ buf.writeUInt16BE(myas, bp);
+ bp+=2;
+ localdata[1].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
+ buf.writeUInt8(24, bp);
+ bp++;
+ localdata[0].split(".").forEach(function(ed){
+ //console.log("Writing in nlri: "+ed);
+ buf.writeUInt8(parseInt(ed), bp);
+ bp++;
+ });
+
+ return buf;
+}
+
+// start sending updates messages
+function beginUpdateSend(c) {
+ data.forEach(function(led) {
+ c.write(led[2]);
+ });
+}
+
+function serverconnection(c) {
+
+ scon = c;
+
+ c.on("end", function() {
+ console.log("Server disconnected");
+ });
+
+ c.on("data", function(buffer) {
+ parseBuffer(buffer, c);
+ });
+
+ console.log("Service connected from: " + c.remoteAddress);
+
+ //c.write("hello\r\n");
+}
+
+console.log("Prefixes created, starting server");
+
+var server = net.createServer(serverconnection);
+
+server.listen(179, function() {
+ console.log("Server bound");
+});
projects / random_node_code.git / blobdiff