diff --git a/Src/ChannelLinter/ChannelLinter.cpp b/Src/ChannelLinter/ChannelLinter.cpp
index e4d36ee..6f4e48e 100644
--- a/Src/ChannelLinter/ChannelLinter.cpp
+++ b/Src/ChannelLinter/ChannelLinter.cpp
@@ -150,54 +150,30 @@ namespace FSecure::C3::Linter
 			std::cout << "Testing channel with " << packetLen << " bytes of data ... " << std::flush;
 			auto data = ByteVector(FSecure::Utils::GenerateRandomData(packetLen));
 
-			// call send and receive interleaved
-			size_t sentTotal = 0;
-			ByteVector received;
-			ByteView sendView{ data };
-			while (sentTotal != packetLen && received.size() != packetLen)
-			{
-				if (sentTotal != packetLen)
-				{
-					auto sent = channel->GetDevice()->OnSendToChannelInternal(sendView);
-					sendView.remove_prefix(sent);
-					sentTotal += sent;
-				}
-
-				std::this_thread::sleep_for(channel->GetDevice()->GetUpdateDelay());
-
-				if (received.size() != packetLen)
-				{
-					auto receivedPackets = std::static_pointer_cast<C3::AbstractChannel>(complementary->GetDevice())->OnReceiveFromChannelInternal();
-					for (auto&& packet : receivedPackets)
-						received.Concat(packet);
-				}
-			}
-
-			if (data != received)
+			channel->Send(data);
+			if (data != complementary->Receive()[0])
 				throw std::exception("Data sent and received mismatch");
+
 			std::cout << "OK" << std::endl;
 		}
 
 		auto numberOfTests = 10;
 		auto packetSize = 64;
 		std::cout << "Testing channel order with " << numberOfTests << " packets of " << packetSize << " bytes of data ... " << std::flush;
-		std::vector<ByteVector> sent, received;
+		std::vector<ByteVector> sent;
 
 		for (auto i = 0; i < numberOfTests; ++i)
 		{
 			sent.push_back(FSecure::Utils::GenerateRandomData(packetSize));
-			channel->GetDevice()->OnSendToChannelInternal(sent[i]);
+			channel->Send(sent[i]);
 		}
 
-		for (auto i = 0; i < numberOfTests && received.size() < sent.size(); ++i)
-		{
-			auto receivedPackets = std::static_pointer_cast<C3::AbstractChannel>(complementary->GetDevice())->OnReceiveFromChannelInternal();
-			received.insert(received.end(), receivedPackets.begin(), receivedPackets.end());
-			std::this_thread::sleep_for(channel->GetDevice()->GetUpdateDelay());
-		}
+		auto received = complementary->Receive(sent.size());
+		received.resize(sent.size());
 
 		if (sent != received)
 			throw std::exception("Data sent and received mismatch");
+
 		std::cout << "OK" << std::endl;
 	}
 
diff --git a/Src/ChannelLinter/MockDeviceBridge.cpp b/Src/ChannelLinter/MockDeviceBridge.cpp
index 7350f19..2f37535 100644
--- a/Src/ChannelLinter/MockDeviceBridge.cpp
+++ b/Src/ChannelLinter/MockDeviceBridge.cpp
@@ -90,4 +90,50 @@ namespace FSecure::C3::Linter
 		return m_Device;
 	}
 
+	void MockDeviceBridge::Send(ByteView blob)
+	{
+		auto oryginalSize = static_cast<uint32_t>(blob.size());
+		auto messageId = m_QoS.GetOutgouingPacketId();
+		auto chunkId = uint32_t{ 0 };
+		for (auto noProgressCounter = 0; noProgressCounter < 10; ++noProgressCounter)
+		{
+			auto data = ByteVector{}.Write(messageId, chunkId, oryginalSize).Concat(blob);
+			auto sent = GetDevice()->OnSendToChannelInternal(data);
+
+			if (sent >= QualityOfService::s_MinFrameSize || sent == data.size())
+			{
+				chunkId++;
+				noProgressCounter = 0;
+				blob.remove_prefix(sent - QualityOfService::s_HeaderSize);
+			}
+
+			if (blob.empty())
+				return;
+		}
+
+		throw std::runtime_error("Cannot send data");
+	}
+
+	std::vector<FSecure::ByteVector> MockDeviceBridge::Receive(size_t minExpectedSize)
+	{
+		auto packets = std::vector<ByteVector>{};
+		for (auto noProgressCounter = 0; noProgressCounter < 10; ++noProgressCounter)
+		{
+			std::this_thread::sleep_for(GetDevice()->GetUpdateDelay());
+			for (auto&& chunk : std::static_pointer_cast<C3::AbstractChannel>(GetDevice())->OnReceiveFromChannelInternal())
+			{
+				m_QoS.PushReceivedChunk(chunk);
+				noProgressCounter = 0;
+			}
+
+			auto packet = ByteVector{};
+			while (packet = m_QoS.GetNextPacket(), !packet.empty())
+				packets.emplace_back(std::move(packet));
+
+			if (packets.size() >= minExpectedSize)
+				return packets;
+		}
+
+		throw std::runtime_error("Cannot receive data");
+	}
 }
diff --git a/Src/ChannelLinter/MockDeviceBridge.h b/Src/ChannelLinter/MockDeviceBridge.h
index 12a7f88..4ecbdd3 100644
--- a/Src/ChannelLinter/MockDeviceBridge.h
+++ b/Src/ChannelLinter/MockDeviceBridge.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "Core/QualityOfService.h"
+
 namespace FSecure::C3::Linter
 {
 	/// Device bridge used to mock its functionality
@@ -66,9 +68,22 @@ namespace FSecure::C3::Linter
 		/// @returns Bridged device
 		std::shared_ptr<FSecure::C3::Device> GetDevice() const;
 
+		/// Send data to through channel.
+		/// @param blob - data to send.
+		/// @throws std::runtime_error if unable to send data.
+		void Send(ByteView blob);
+
+		/// Receive data from channel.
+		/// @param minExpectedSize - min number of packets function should return.
+		/// @throws std::runtime_error if unable to return vector of required number of full packets.
+		std::vector<ByteVector> Receive(size_t minExpectedSize = 1);
+
 	private:
 		/// Bridged device
 		std::shared_ptr<Device> m_Device;
+
+		/// Handle chunking.
+		QualityOfService m_QoS;
 	};
 }