Method writeUdpRecv

src/ringbuffer.js:233–259

* Write UDP receive event * @param {Object} msg - UDP message with data, srcIP, srcPort, dstIP, dstPort

(msg)

     * @param {Object} msg - UDP message with data, srcIP, srcPort, dstIP, dstPort
     */
    writeUdpRecv(msg) {
        // Format: srcIPLen(1) + srcIP + srcPort(2) + dstIPLen(1) + dstIP + dstPort(2) + data
        const srcIPBytes = Buffer.from(msg.srcIP, 'utf8');
        const dstIPBytes = Buffer.from(msg.dstIP, 'utf8');
        const dataBytes = Buffer.isBuffer(msg.data) ? msg.data : Buffer.from(msg.data);
        
        const payload = Buffer.alloc(1 + srcIPBytes.length + 2 + 1 + dstIPBytes.length + 2 + dataBytes.length);
        let offset = 0;
        
        payload[offset++] = srcIPBytes.length;
        srcIPBytes.copy(payload, offset);
        offset += srcIPBytes.length;
        
        payload.writeUInt16LE(msg.srcPort, offset);
        offset += 2;
        
        payload[offset++] = dstIPBytes.length;
        dstIPBytes.copy(payload, offset);
        offset += dstIPBytes.length;
        
        payload.writeUInt16LE(msg.dstPort, offset);
        offset += 2;
        
        dataBytes.copy(payload, offset);
        
        return this.writeMessage(NET_MSG_UDP_RECV, payload);
    }
    
    /**
     * Write stdin data