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feat: decrease TTL on each hop #269

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Merged
Manuel-Pol merged 1 commit into from
Jun 2, 2025
Merged

feat: decrease TTL on each hop #269

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19 changes: 14 additions & 5 deletions src/types/view-devices/vRouter.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -176,19 +176,28 @@ export class ViewRouter extends ViewNetworkDevice {

addPacketToQueue(datagram: IPv4Packet) {
const wasEmpty = this.packetQueue.isEmpty();
datagram.timeToLive -= 1;
if (datagram.timeToLive <= 0) {
console.debug(`Device ${this.id} dropped packet with TTL 0`);
this.dropPacket(datagram);
}
if (!this.packetQueue.enqueue(datagram)) {
console.debug("Packet queue full, dropping packet");
// dummy values
const dummyMac = this.interfaces[0].mac;
const frame = new EthernetFrame(dummyMac, dummyMac, datagram);
dropPacket(this.viewgraph, this.id, frame);
this.dropPacket(datagram);
return;
}
if (wasEmpty) {
this.startPacketProcessor();
}
}

dropPacket(datagram: IPv4Packet) {
// dummy values
const dummyMac = this.interfaces[0].mac;
const frame = new EthernetFrame(dummyMac, dummyMac, datagram);
dropPacket(this.viewgraph, this.id, frame);
}

processPacket(ticker: Ticker) {
const elapsedTime = ticker.deltaMS * this.viewgraph.getSpeed();
const datagram = this.getPacketsToProcess(elapsedTime);
Expand Down Expand Up @@ -239,7 +248,7 @@ export class ViewRouter extends ViewNetworkDevice {

routePacket(datagram: IPv4Packet): number {
console.debug(
`Device ${this.id} va a rutear el datagram con origen ${datagram.sourceAddress.toString()} y destino ${datagram.destinationAddress.toString()}`,
`Device ${this.id} will route datagram of origin ${datagram.sourceAddress.toString()} and destination ${datagram.destinationAddress.toString()}`,
);
const device = this.viewgraph.getDataGraph().getDevice(this.id);
if (!device || !(device instanceof DataRouter)) {
Expand Down