make PacketPayload a QIODevice subclass

domain-server/src/DomainServer.cpp

@@ -617,11 +617,16 @@ void DomainServer::handleConnectRequest(const QByteArray& packet, const HifiSock
     QString reason;
     if (!isAssignment && !shouldAllowConnectionFromNode(username, usernameSignature, senderSockAddr, reason)) {
         // this is an agent and we've decided we won't let them connect - send them a packet to deny connection
-        QByteArray connectionDeniedByteArray = limitedNodeList->byteArrayWithPopulatedHeader(PacketTypeDomainConnectionDenied);
-        QDataStream out(&connectionDeniedByteArray, QIODevice::WriteOnly | QIODevice::Append);
-        out << reason;
+
+        QByteArray utfString = reason.toUtf8();
+        int payloadSize = utfString.size();
+
+        auto connectionDeniedPacket = NodeListPacket::make(PacketType::DomainConnectionDenied, payloadSize);
+
+        memcpy(connectionDeniedPacket.payload().data(), utfString.data(), utfString.size());
+
         // tell client it has been refused.
-        DependencyManager::get<LimitedNodeList>()->writeUnverifiedDatagram(connectionDeniedByteArray, senderSockAddr);
+        limitedNodeList->sendPacket(std::move(connectionDeniedPacket, senderSockAddr);
 
         return;
     }
@@ -921,10 +926,11 @@ int DomainServer::parseNodeDataFromByteArray(QDataStream& packetStream, NodeType
 void DomainServer::sendDomainListToNode(const SharedNodePointer& node, const HifiSockAddr &senderSockAddr,
                                         const NodeSet& nodeInterestSet) {
     auto limitedNodeList = DependencyManager::get<LimitedNodeList>();
-    QByteArray broadcastPacket = limitedNodeList->byteArrayWithPopulatedHeader(PacketTypeDomainList);
+
+    auto listPacket = NodeListPacket::make(PacketType::DomainList);
 
     // always send the node their own UUID back
-    QDataStream broadcastDataStream(&broadcastPacket, QIODevice::Append);
+    QDataStream broadcastDataStream(&listPacket.payload(), QIODevice::Append);
     broadcastDataStream << node->getUUID();
     broadcastDataStream << node->getCanAdjustLocks();
     broadcastDataStream << node->getCanRez();

libraries/networking/src/PacketByteArray.cpp

@@ -1,5 +1,5 @@
 //
-//  PacketByteArray.cpp
+//  PacketPayload.cpp
 //  libraries/networking/src
 //
 //  Created by Stephen Birarda on 07/06/15.
@@ -9,16 +9,16 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
-#include "PacketByteArray.h"
+#include "PacketPayload.h"
 
-PacketByteArray::PacketByteArray(char* data, int maxBytes) :
+PacketPayload::PacketPayload(char* data, int maxBytes) :
     _data(data)
     _maxBytes(maxBytes)
 {
 
 }
 
-int PacketByteArray::append(const char* src, int srcBytes) {
+int PacketPayload::append(const char* src, int srcBytes) {
     // this is a call to write at the current index
     int numWrittenBytes = write(src, srcBytes, _index);
 
@@ -33,7 +33,7 @@ int PacketByteArray::append(const char* src, int srcBytes) {
 
 const int PACKET_WRITE_ERROR = -1;
 
-int PacketByteArray::write(const char* src, int srcBytes, int index) {
+int PacketPayload::write(const char* src, int srcBytes, int index) {
     if (index >= _maxBytes) {
         // we were passed a bad index, return -1
         return PACKET_WRITE_ERROR;

libraries/networking/src/PacketByteArray.h

@@ -1,29 +0,0 @@
-//
-//  PacketByteArray.h
-//  libraries/networking/src
-//
-//  Created by Stephen Birarda on 07/06/15.
-//  Copyright 2015 High Fidelity, Inc.
-//
-//  Distributed under the Apache License, Version 2.0.
-//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
-//
-
-#ifndef hifi_PacketByteArray_h
-#define hifi_PacketByteArray_h
-
-#pragma once
-
-class PacketByteArray {
-public:
-    PacketByteArray(char* data, int maxBytes);
-
-    int write(const char* src, int srcBytes, int index = 0);
-    int append(const char* src, int srcBytes)
-private:
-    char* _data;
-    int _index = 0;
-    int _maxBytes = 0;
-};
-
-#endif // hifi_PacketByteArray_h

libraries/networking/src/PacketPayload.cpp

@@ -0,0 +1,89 @@
+//
+//  PacketPayload.cpp
+//  libraries/networking/src
+//
+//  Created by Stephen Birarda on 07/06/15.
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include "PacketPayload.h"
+
+PacketPayload::PacketPayload(char* data, qint64 maxBytes) :
+    _data(data)
+    _maxBytes(maxBytes)
+{
+
+}
+
+qint64 PacketPayload::append(const char* src, qint64 srcBytes) {
+    // this is a call to write at the current index
+    qint64 numWrittenBytes = write(src, srcBytes, _index);
+
+    if (numWrittenBytes > 0) {
+        // we wrote some bytes, push the index
+        _index += numWrittenBytes;
+        return numWrittenBytes;
+    } else {
+        return numWrittenBytes;
+    }
+}
+
+const int PACKET_READ_ERROR = -1;
+
+qint64 PacketPayload::write(const char* src, qint64 srcBytes, qint64 index) {
+    if (index >= _maxBytes) {
+        // we were passed a bad index, return error
+        return PACKET_WRITE_ERROR;
+    }
+
+    // make sure we have the space required to write this block
+    qint64 bytesAvailable = _maxBytes - index;
+
+    if (bytesAvailable < srcBytes) {
+        // good to go - write the data
+        memcpy(_data + index, src, srcBytes);
+
+        // should this cause us to push our index (is this the farthest we've written in data)?
+        _writeIndex = std::max(_data + index + srcBytes, _writeIndex);
+
+        // return the number of bytes written
+        return srcBytes;
+    } else {
+        // not enough space left for this write - return an error
+        return PACKET_WRITE_ERROR;
+    }
+}
+
+qint64 PacketPayload::readNext(char* dest, qint64 maxSize) {
+    // call read at the current _readIndex
+    int numBytesRead = read(dest, maxSize, _readIndex);
+
+    if (numBytesRead > 0) {
+        // we read some data, push the read index
+        _readIndex += numBytesRead;
+    }
+
+    return numBytesRead;
+}
+
+const qint64 PACKET_READ_ERROR = -1;
+
+qint64 PacketPayload::read(char* dest, qint64 maxSize, qint64 index) {
+    if (index >= _maxBytes) {
+        // we were passed a bad index, return error
+        return PACKET_READ_ERROR;
+    }
+
+    // we're either reading what is left from the index or what was asked to be read
+    qint64 numBytesToRead = std::min(_maxSize - index, maxSize);
+
+    if (numBytesToRead > 0) {
+        // read out the data
+        memcpy(dest, _data + index, numBytesToRead);
+    }
+
+    return numBytesToRead;
+}

libraries/networking/src/PacketPayload.h

@@ -0,0 +1,42 @@
+//
+//  PacketPayload.h
+//  libraries/networking/src
+//
+//  Created by Stephen Birarda on 07/06/15.
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#ifndef hifi_PacketPayload_h
+#define hifi_PacketPayload_h
+
+#pragma once
+
+#include <QtCore/QIODevice>
+
+class PacketPayload : public QIODevice {
+public:
+    PacketPayload(char* data, qint64 maxBytes);
+
+    qint64 write(const char* src, qint64 srcBytes, qint64 index = 0);
+    qint64 append(const char* src, qint64 srcBytes);
+
+    qint64 read(char* dest, qint64 maxSize, qint64 index = 0);
+    qint64 readNext(char* dest, qint64 maxSize);
+
+protected:
+    virtual qint64 writeData(const char* data, qint64 maxSize) { return append(data, maxSize) };
+    virtual qint64 readData(const char* data, qint64 maxSize) { return readNext(data, maxSize) };
+
+private:
+    char* _data;
+
+    qint64 _writeIndex = 0;
+    qint64 _readIndex = 0;
+
+    qint64 _maxBytes = 0;
+};
+
+#endif // hifi_PacketByteArray_h