Prepare TCP support

src/common/network/tcp_server_socket.cpp

@@ -0,0 +1,35 @@
+#include "tcp_server_socket.hpp"
+
+namespace network
+{
+    tcp_server_socket::tcp_server_socket(const int af)
+        : socket(af, SOCK_STREAM, IPPROTO_TCP)
+    {
+    }
+
+    tcp_client_socket tcp_server_socket::accept()
+    {
+        this->listen();
+
+        address a{};
+        auto len = a.get_max_size();
+        auto s = ::accept(this->get_socket(), &a.get_addr(), &len);
+
+        if (s == INVALID_SOCKET)
+        {
+            return {};
+        }
+
+        return tcp_client_socket{s, a};
+    }
+
+    void tcp_server_socket::listen()
+    {
+        if (this->listening_)
+        {
+            return;
+        }
+
+        this->listening_ = ::listen(this->get_socket(), 32) == 0;
+    }
+}