Method handleICMP

src/network.js:479–493

(data, srcIP, dstIP, ipHeader)

    }

    handleICMP(data, srcIP, dstIP, ipHeader) {
        const type = data[0];
        if (type === 8) { // Echo Request
             // Reply
             const reply = Buffer.alloc(data.length);
             data.copy(reply);
             reply[0] = 0; // Echo Reply
             reply[2] = 0; reply[3] = 0; // Clear checksum
             
             const ck = this.calculateChecksum(reply);
             reply.writeUInt16BE(ck, 2);
             
             this.sendIP(reply, IP_PROTO_ICMP, dstIP, srcIP);
        }
    }

    sendIP(payload, protocol, srcIP, dstIP) {
        const header = Buffer.alloc(20);