From 4b8d06f50139b33d7670c286e2e3f006843ac8ba Mon Sep 17 00:00:00 2001
From: Jak <5613046+Syphonx@users.noreply.github.com>
Date: Mon, 22 Apr 2019 19:03:00 +0100
Subject: [rnet] module WIP (#809)

Added experimental network module
---
 examples/network/network_udp_server.c | 134 ++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 examples/network/network_udp_server.c

(limited to 'examples/network/network_udp_server.c')

diff --git a/examples/network/network_udp_server.c b/examples/network/network_udp_server.c
new file mode 100644
index 00000000..982cdf63
--- /dev/null
+++ b/examples/network/network_udp_server.c
@@ -0,0 +1,134 @@
+/*******************************************************************************************
+ *
+ *   raylib [network] example - UDP Server
+ *
+ *   Welcome to raylib!
+ *
+ *   To test examples, just press F6 and execute raylib_compile_execute script
+ *   Note that compiled executable is placed in the same folder as .c file
+ *
+ *   You can find all basic examples on C:\raylib\raylib\examples folder or
+ *   raylib official webpage: www.raylib.com
+ *
+ *   Enjoy using raylib. :)
+ *
+ *   This example has been created using raylib 2.0 (www.raylib.com)
+ *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h
+ *for details)
+ *
+ *   Copyright (c) 2013-2016 Ramon Santamaria (@raysan5)
+ *
+ ********************************************************************************************/
+
+#include "raylib.h"
+#include "rnet.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+float         elapsed    = 0.0f;
+float         delay      = 1.0f;
+bool          ping       = false;
+bool          pong       = false;
+const char *  pingmsg    = "Ping!";
+const char *  pongmsg    = "Pong!";
+int           msglen     = 0;
+SocketConfig  server_cfg = {.host = "127.0.0.1", .port = "4950", .server = true, .type = SOCKET_UDP, .nonblocking = true};
+SocketResult *server_res = NULL;
+SocketSet *   socket_set = NULL;
+char          recvBuffer[512];
+
+// Once connected to the network, check the sockets for pending information
+// and when information is ready, send either a Ping or a Pong.
+void NetworkUpdate()
+{
+	// CheckSockets
+	//
+	// If any of the sockets in the socket_set are pending (received data, or requests)
+	// then mark the socket as being ready. You can check this with IsSocketReady(client_res->socket)
+	int active = CheckSockets(socket_set, 0);
+	if (active != 0) {
+		TraceLog(LOG_DEBUG,
+				 "There are currently %d socket(s) with data to be processed.", active);
+	}
+
+	// IsSocketReady
+	//
+	// If the socket is ready, attempt to receive data from the socket
+	//  int bytesRecv = 0;
+	//  if (IsSocketReady(server_res->socket)) {
+	//      bytesRecv = SocketReceive(server_res->socket, recvBuffer, msglen);
+	//  }
+	int bytesRecv = SocketReceive(server_res->socket, recvBuffer, msglen);
+
+	// If we received data, was that data a "Ping!" or a "Pong!"
+	if (bytesRecv > 0) {
+		if (strcmp(recvBuffer, pingmsg) == 0) { pong = true; }
+		if (strcmp(recvBuffer, pongmsg) == 0) { ping = true; }
+	}
+
+	// After each delay has expired, send a response "Ping!" for a "Pong!" and vice versa
+	elapsed += GetFrameTime();
+	if (elapsed > delay) {
+		if (ping) {
+			ping = false;
+			SocketSend(server_res->socket, pingmsg, msglen);
+		} else if (pong) {
+			pong = false;
+			SocketSend(server_res->socket, pongmsg, msglen);
+		}
+		elapsed = 0.0f;
+	}
+}
+
+int main()
+{
+	// Setup
+	int screenWidth  = 800;
+	int screenHeight = 450;
+	InitWindow(
+		screenWidth, screenHeight, "raylib [network] example - udp server");
+	SetTargetFPS(60);
+	SetTraceLogLevel(LOG_DEBUG);
+
+	// Networking
+	InitNetwork();
+
+	//  Create the server
+	//
+	//  Performs
+	//      getaddrinfo
+	//      socket
+	//      setsockopt
+	//      bind
+	//      listen
+	server_res = AllocSocketResult();
+	if (!SocketCreate(&server_cfg, server_res)) {
+		TraceLog(LOG_WARNING, "Failed to open server: status %d, errno %d",
+				 server_res->status, server_res->socket->status);
+	} else {
+		if (!SocketBind(&server_cfg, server_res)) {
+			TraceLog(LOG_WARNING, "Failed to bind server: status %d, errno %d",
+					 server_res->status, server_res->socket->status);
+		}
+	}
+
+	//  Create & Add sockets to the socket set
+	socket_set = AllocSocketSet(1);
+	msglen     = strlen(pingmsg) + 1;
+	memset(recvBuffer, '\0', sizeof(recvBuffer));
+	AddSocket(socket_set, server_res->socket);
+
+	// Main game loop
+	while (!WindowShouldClose()) {
+		BeginDrawing();
+		ClearBackground(RAYWHITE);
+		NetworkUpdate();
+		EndDrawing();
+	}
+
+	// Cleanup
+	CloseWindow();
+	return 0;
+}
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