add client and server

Makefile

@@ -7,9 +7,9 @@ CXX := $(PREFIX)-g++
 LD := $(PREFIX)-ld
 CPPFLAGS := -I$(SFML_DIR)/include
 CXXFLAGS := -mwindows
-LDFLAGS := -L$(SFML_DIR)/lib -lsfml-system -lsfml-window -lsfml-graphics -lopengl32 -lglu32 -static-libstdc++ -static-libgcc -mwindows
+LDFLAGS := -L$(SFML_DIR)/lib -lsfml-system -lsfml-window -lsfml-graphics -lsfml-network -lopengl32 -lglu32 -static-libstdc++ -static-libgcc -mwindows
 
-all: clock window events opengl graphics text dlls
+all: clock window events opengl graphics text client server dlls
 
 %: %.cpp
 	$(CXX) -o $@ $(CPPFLAGS) $(CXXFLAGS) $^ $(LDFLAGS)

client.cpp

@@ -0,0 +1,29 @@
+
+#include <iostream>
+#include <SFML/network.hpp>
+
+#define PORT 57219
+
+int main(int argc, char *argv[])
+{
+    if (argc < 2)
+    {
+        std::cerr << "Usage: client <server_name>" << std::endl;
+        return 1;
+    }
+    sf::IPAddress server(argv[1]);
+    if (!server.IsValid())
+    {
+        std::cerr << "Host not found" << std::endl;
+        return 1;
+    }
+    sf::SocketUDP socket;
+    char msg[] = "Hello from client!";
+    if (socket.Send(msg, sizeof(msg), server, PORT) != sf::Socket::Done)
+    {
+        std::cerr << "Error sending data" << std::endl;
+        return 1;
+    }
+    socket.Close();
+    return 0;
+}

server.cpp

@@ -0,0 +1,30 @@
+
+#include <iostream>
+#include <SFML/network.hpp>
+
+#define PORT 57219
+
+int main(int argc, char *argv[])
+{
+    sf::SocketUDP socket;
+    char buffer[1000];
+    sf::IPAddress sender;
+    unsigned short port;
+    size_t received;
+    if (!socket.Bind(PORT))
+    {
+        std::cerr << "Error binding to port " << PORT << std::endl;
+        return 1;
+    }
+    if (socket.Receive(buffer, sizeof(buffer), received, sender, port)
+            != sf::Socket::Done)
+    {
+        std::cerr << "Error receiving data" << std::endl;
+        return 1;
+    }
+    buffer[received] = '\0';
+    std::cout << "Received " << received << " bytes from " <<
+        sender << ':' << port << ": \"" << buffer << '"' << std::endl;
+    socket.Close();
+    return 0;
+}