From 7420a170928da75cb860e3fc8804416babdeec8c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Sat, 12 Aug 2023 17:53:08 +0200
Subject: New class for network protocol implementation

---
 src/network/protocol.cpp | 69 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/network/protocol.h   | 33 +++++++++++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 src/network/protocol.cpp
 create mode 100644 src/network/protocol.h

(limited to 'src/network')

diff --git a/src/network/protocol.cpp b/src/network/protocol.cpp
new file mode 100644
index 0000000..63cfde5
--- /dev/null
+++ b/src/network/protocol.cpp
@@ -0,0 +1,69 @@
+#include "protocol.h"
+
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <system_error>
+
+namespace erebos {
+
+NetworkProtocol::NetworkProtocol():
+	sock(-1)
+{}
+
+NetworkProtocol::NetworkProtocol(int s):
+	sock(s)
+{}
+
+NetworkProtocol::NetworkProtocol(NetworkProtocol && other):
+	sock(other.sock)
+{
+	other.sock = -1;
+}
+
+NetworkProtocol & NetworkProtocol::operator=(NetworkProtocol && other)
+{
+	sock = other.sock;
+	other.sock = -1;
+	return *this;
+}
+
+NetworkProtocol::~NetworkProtocol()
+{
+	if (sock >= 0)
+		close(sock);
+}
+
+bool NetworkProtocol::recvfrom(vector<uint8_t> & buffer, sockaddr_in6 & addr)
+{
+	socklen_t addrlen = sizeof(addr);
+	buffer.resize(4096);
+	ssize_t ret = ::recvfrom(sock, buffer.data(), buffer.size(), 0,
+			(sockaddr *) &addr, &addrlen);
+	if (ret < 0)
+		throw std::system_error(errno, std::generic_category());
+	if (ret == 0)
+		return false;
+
+	buffer.resize(ret);
+	return true;
+}
+
+void NetworkProtocol::sendto(const vector<uint8_t> & buffer, sockaddr_in addr)
+{
+	::sendto(sock, buffer.data(), buffer.size(), 0,
+			(sockaddr *) &addr, sizeof(addr));
+}
+
+void NetworkProtocol::sendto(const vector<uint8_t> & buffer, sockaddr_in6 addr)
+{
+	::sendto(sock, buffer.data(), buffer.size(), 0,
+			(sockaddr *) &addr, sizeof(addr));
+}
+
+void NetworkProtocol::shutdown()
+{
+	::shutdown(sock, SHUT_RDWR);
+}
+
+}
diff --git a/src/network/protocol.h b/src/network/protocol.h
new file mode 100644
index 0000000..6a22f3b
--- /dev/null
+++ b/src/network/protocol.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <netinet/in.h>
+
+#include <cstdint>
+#include <vector>
+
+namespace erebos {
+
+using std::vector;
+
+class NetworkProtocol
+{
+public:
+	NetworkProtocol();
+	explicit NetworkProtocol(int sock);
+	NetworkProtocol(const NetworkProtocol &) = delete;
+	NetworkProtocol(NetworkProtocol &&);
+	NetworkProtocol & operator=(const NetworkProtocol &) = delete;
+	NetworkProtocol & operator=(NetworkProtocol &&);
+	~NetworkProtocol();
+
+	bool recvfrom(vector<uint8_t> & buffer, sockaddr_in6 & addr);
+	void sendto(const vector<uint8_t> & buffer, sockaddr_in addr);
+	void sendto(const vector<uint8_t> & buffer, sockaddr_in6 addr);
+
+	void shutdown();
+
+private:
+	int sock;
+};
+
+}
-- 
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