Imported basics

project directory
client - scene system
server - empty main
SDL_net source
graphical resources

client/base_scene.cpp

@@ -0,0 +1,114 @@
+#include "base_scene.h"
+
+#include <stdexcept>
+
+//-------------------------
+//Static declarations
+//-------------------------
+
+SDL_Surface* BaseScene::screen = nullptr;
+
+//-------------------------
+//Public access members
+//-------------------------
+
+BaseScene::BaseScene() {
+	nextScene = SceneList::CONTINUE;
+}
+
+BaseScene::~BaseScene() {
+	//
+}
+
+//-------------------------
+//Program control
+//-------------------------
+
+SDL_Surface* BaseScene::SetScreen(int w, int h, int bpp, Uint32 flags) {
+	if (!bpp) {
+		bpp = SDL_GetVideoInfo()->vfmt->BitsPerPixel;
+	}
+
+	screen = SDL_SetVideoMode(w, h, bpp, flags);
+
+	if (screen == NULL) {
+		throw(std::runtime_error("Failed to create the screen surface"));
+	}
+
+	return screen;
+}
+
+SDL_Surface* BaseScene::GetScreen() {
+	return screen;
+}
+
+SceneList BaseScene::SetNextScene(SceneList sceneIndex) {
+	return nextScene = sceneIndex;
+}
+
+SceneList BaseScene::GetNextScene() const {
+	return nextScene;
+}
+
+//-------------------------
+//Frame loop
+//-------------------------
+
+void BaseScene::RunFrame() {
+	FrameStart();
+	HandleEvents();
+	Update();
+	Render(screen);
+	SDL_Flip(screen);
+	FrameEnd();
+}
+
+//-------------------------
+//Event handlers
+//-------------------------
+
+void BaseScene::HandleEvents() {
+	SDL_Event event;
+
+	while(SDL_PollEvent(&event)) {
+		switch(event.type) {
+			case SDL_QUIT:
+				QuitEvent();
+			break;
+
+			case SDL_VIDEORESIZE:
+				SetScreen(event.resize.w, event.resize.h, 0, screen->flags);
+			break;
+
+			case SDL_MOUSEMOTION:
+				MouseMotion(event.motion);
+			break;
+
+			case SDL_MOUSEBUTTONDOWN:
+				MouseButtonDown(event.button);
+			break;
+
+			case SDL_MOUSEBUTTONUP:
+				MouseButtonUp(event.button);
+			break;
+
+			case SDL_KEYDOWN:
+				KeyDown(event.key);
+			break;
+
+			case SDL_KEYUP:
+				KeyUp(event.key);
+			break;
+
+#ifdef USE_EVENT_JOYSTICK
+			//TODO: joystick/gamepad support
+#endif
+
+#ifdef USE_EVENT_UNKNOWN
+			default:
+				UnknownEvent(event);
+			break;
+#endif
+		}//switch
+	}//while
+}

client/base_scene.h

@@ -0,0 +1,53 @@
+#ifndef BASESCENE_H_
+#define BASESCENE_H_
+
+#include "scene_list.h"
+
+#include "SDL/SDL.h"
+
+class BaseScene {
+public:
+	/* Public access members */
+	BaseScene();
+	virtual ~BaseScene();
+
+	/* Program control */
+	static SDL_Surface* SetScreen(int w, int h, int bpp = 0, Uint32 flags = SDL_HWSURFACE|SDL_DOUBLEBUF);
+	static SDL_Surface* GetScreen();
+
+	SceneList SetNextScene(SceneList sceneIndex);
+	SceneList GetNextScene() const;
+
+	/* Frame loop */
+	virtual void RunFrame();
+
+protected:
+	virtual void FrameStart() {}
+	virtual void FrameEnd() {}
+	virtual void Update() {}
+	virtual void Render(SDL_Surface* const screen) {}
+
+	/* Event handlers */
+	virtual void HandleEvents();
+
+	virtual void QuitEvent			() { SetNextScene(SceneList::QUIT); }
+	virtual void MouseMotion		(SDL_MouseMotionEvent const&) {}
+	virtual void MouseButtonDown	(SDL_MouseButtonEvent const&) {}
+	virtual void MouseButtonUp		(SDL_MouseButtonEvent const&) {}
+	virtual void KeyDown			(SDL_KeyboardEvent const&) {}
+	virtual void KeyUp				(SDL_KeyboardEvent const&) {}
+
+#ifdef USE_EVENT_JOYSTICK
+	//TODO: joystick/gamepad support
+#endif
+
+#ifdef USE_EVENT_UNKNOWN
+	virtual void UnknownEvent		(SDL_Event const&) {}
+#endif
+
+private:
+	static SDL_Surface* screen;
+	SceneList nextScene;
+};
+
+#endif

client/main.cpp

@@ -0,0 +1,20 @@
+#include "scene_manager.h"
+
+#include <stdexcept>
+#include <iostream>
+
+using namespace std;
+
+int main(int, char**) {
+	SceneManager app;
+	try {
+		app.Init();
+		app.Proc();
+		app.Quit();
+	}
+	catch(exception& e) {
+		cerr << "Fatal error: " << e.what() << endl;
+		return 1;
+	}
+	return 0;
+}

client/makefile

@@ -0,0 +1,19 @@
+CXXFLAGS+=-std=c++11
+DFLAGS=-DDEBUG
+LIB=-lmingw32 -lSDL_net -lSDLmain -lSDL -lwsock32 -liphlpapi
+OBJ=base_scene.o scene_manager.o main.o
+SRC=test_systems.cpp
+
+all: debug
+
+release: $(OBJ)
+	$(CXX) $(CXXFLAGS) $(SRC) $(OBJ) $(LIB)
+
+debug: $(OBJ)
+	$(CXX) $(CXXFLAGS) $(DFLAGS) $(SRC) $(OBJ) $(LIB)
+
+clean:
+	-$(RM) *.o *.a *.exe
+
+unit:
+	$(CXX) $(CXXFLAGS) unit.cpp

client/scene_list.h

@@ -0,0 +1,14 @@
+#ifndef SCENELIST_H_
+#define SCENELIST_H_
+
+enum class SceneList {
+	//these are reserved
+	QUIT,
+	CONTINUE,
+	FIRST,
+
+	//custom indexes
+	TESTSYSTEMS,
+};
+
+#endif

client/scene_manager.cpp

@@ -0,0 +1,76 @@
+#include "scene_manager.h"
+
+#include <stdexcept>
+
+//-------------------------
+//Scene headers
+//-------------------------
+
+//Add the custom scene headers here
+#include "test_systems.h"
+
+//-------------------------
+//Public access members
+//-------------------------
+
+SceneManager::SceneManager() {
+	activeScene = nullptr;
+}
+
+SceneManager::~SceneManager() {
+	UnloadScene();
+}
+
+void SceneManager::Init() {
+	if (SDL_Init(SDL_INIT_VIDEO))
+		throw(std::runtime_error("Failed to initialize SDL"));
+
+	BaseScene::SetScreen(800, 600);
+}
+
+void SceneManager::Proc() {
+	LoadScene(SceneList::FIRST);
+
+	//The main loop
+	while(activeScene->GetNextScene() != SceneList::QUIT) {
+		//switch scenes when necessary
+		if (activeScene->GetNextScene() != SceneList::CONTINUE) {
+			LoadScene(activeScene->GetNextScene());
+			continue;
+		}
+
+		//call each user defined function
+		activeScene->RunFrame();
+	}
+
+	UnloadScene();
+}
+
+void SceneManager::Quit() {
+	UnloadScene();
+	SDL_Quit();
+}
+
+//-------------------------
+//Private access members
+//-------------------------
+
+void SceneManager::LoadScene(SceneList sceneIndex) {
+	UnloadScene();
+
+	switch(sceneIndex) {
+		//add scene creation calls here
+		case SceneList::FIRST:
+		case SceneList::TESTSYSTEMS:
+			activeScene = new TestSystems();
+		break;
+
+		default:
+			throw(std::logic_error("Failed to recognize the scene index"));
+	}
+}
+
+void SceneManager::UnloadScene() {
+	delete activeScene;
+	activeScene = nullptr;
+}

client/scene_manager.h

@@ -0,0 +1,27 @@
+#ifndef SCENEMANAGER_H_
+#define SCENEMANAGER_H_
+
+#include "scene_list.h"
+#include "base_scene.h"
+
+#include "SDL/SDL.h"
+
+class SceneManager {
+public:
+	/* Public access members */
+	SceneManager();
+	~SceneManager();
+
+	void Init();
+	void Proc();
+	void Quit();
+
+private:
+	/* Private access members */
+	void LoadScene(SceneList sceneIndex);
+	void UnloadScene();
+
+	BaseScene* activeScene;
+};
+
+#endif

client/test_systems.cpp

@@ -0,0 +1,61 @@
+#include "test_systems.h"
+
+//-------------------------
+//Public access members
+//-------------------------
+
+TestSystems::TestSystems() {
+	//
+}
+
+TestSystems::~TestSystems() {
+	//
+}
+
+//-------------------------
+//Frame loop
+//-------------------------
+
+void TestSystems::FrameStart() {
+	//
+}
+
+void TestSystems::FrameEnd() {
+	//
+}
+
+void TestSystems::Update() {
+	//
+}
+
+void TestSystems::Render(SDL_Surface* const screen) {
+	//
+}
+
+//-------------------------
+//Event handlers
+//-------------------------
+
+void TestSystems::MouseMotion(SDL_MouseMotionEvent const& motion) {
+	//
+}
+
+void TestSystems::MouseButtonDown(SDL_MouseButtonEvent const& button) {
+	//
+}
+
+void TestSystems::MouseButtonUp(SDL_MouseButtonEvent const& button) {
+	//
+}
+
+void TestSystems::KeyDown(SDL_KeyboardEvent const& key) {
+	switch(key.keysym.sym) {
+		case SDLK_ESCAPE:
+			QuitEvent();
+		break;
+	}
+}
+
+void TestSystems::KeyUp(SDL_KeyboardEvent const& key) {
+	//
+}

client/test_systems.h

@@ -0,0 +1,27 @@
+#ifndef TESTSYSTEMS_H_
+#define TESTSYSTEMS_H_
+
+#include "base_scene.h"
+
+class TestSystems : public BaseScene {
+public:
+	/* Public access members */
+	TestSystems();
+	virtual ~TestSystems();
+
+protected:
+	/* Frame loop */
+	virtual void FrameStart();
+	virtual void FrameEnd();
+	virtual void Update();
+	virtual void Render(SDL_Surface* const);
+
+	/* Event handlers */
+	virtual void MouseMotion		(SDL_MouseMotionEvent const&);
+	virtual void MouseButtonDown	(SDL_MouseButtonEvent const&);
+	virtual void MouseButtonUp		(SDL_MouseButtonEvent const&);
+	virtual void KeyDown			(SDL_KeyboardEvent const&);
+	virtual void KeyUp				(SDL_KeyboardEvent const&);
+};
+
+#endif

docs/pseudocode.txt

@@ -0,0 +1,24 @@
+Client:
+	loops
+	handles input from the user
+	handles graphics and sound
+	communicates with the server (how?)
+
+-------------------------
+
+Server:
+	loops
+	accepts new connections, disconnections, and handles loss of connections
+	holds the positions/data of all players
+
+Player:
+	id
+	[graphical stuff]
+	position
+	velocity
+
+-------------------------
+
+Animations:
+	multiple cells in one animation (x-axis)
+	multiple animations in one sheet (y-axis)

libs/SDL_net/SDL_net.h

@@ -0,0 +1,452 @@
+/*
+  SDL_net:  An example cross-platform network library for use with SDL
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* $Id$ */
+
+#ifndef _SDL_NET_H
+#define _SDL_NET_H
+
+#include "SDL.h"
+#include "SDL_endian.h"
+#include "SDL_version.h"
+#include "begin_code.h"
+
+
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL
+*/
+#define SDL_NET_MAJOR_VERSION	1
+#define SDL_NET_MINOR_VERSION	2
+#define SDL_NET_PATCHLEVEL	8
+
+/* This macro can be used to fill a version structure with the compile-time
+ * version of the SDL_net library.
+ */
+#define SDL_NET_VERSION(X)						\
+{									\
+	(X)->major = SDL_NET_MAJOR_VERSION;				\
+	(X)->minor = SDL_NET_MINOR_VERSION;				\
+	(X)->patch = SDL_NET_PATCHLEVEL;				\
+}
+
+/* This function gets the version of the dynamically linked SDL_net library.
+   it should NOT be used to fill a version structure, instead you should
+   use the SDL_NET_VERSION() macro.
+ */
+extern DECLSPEC const SDL_version * SDLCALL SDLNet_Linked_Version(void);
+
+/* Initialize/Cleanup the network API
+   SDL must be initialized before calls to functions in this library,
+   because this library uses utility functions from the SDL library.
+*/
+extern DECLSPEC int  SDLCALL SDLNet_Init(void);
+extern DECLSPEC void SDLCALL SDLNet_Quit(void);
+
+/***********************************************************************/
+/* IPv4 hostname resolution API                                        */
+/***********************************************************************/
+
+typedef struct {
+	Uint32 host;			/* 32-bit IPv4 host address */
+	Uint16 port;			/* 16-bit protocol port */
+} IPaddress;
+
+/* Resolve a host name and port to an IP address in network form.
+   If the function succeeds, it will return 0.
+   If the host couldn't be resolved, the host portion of the returned
+   address will be INADDR_NONE, and the function will return -1.
+   If 'host' is NULL, the resolved host will be set to INADDR_ANY.
+ */
+#ifndef INADDR_ANY
+#define INADDR_ANY		0x00000000
+#endif
+#ifndef INADDR_NONE
+#define INADDR_NONE		0xFFFFFFFF
+#endif
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK		0x7f000001
+#endif
+#ifndef INADDR_BROADCAST
+#define INADDR_BROADCAST	0xFFFFFFFF
+#endif
+extern DECLSPEC int SDLCALL SDLNet_ResolveHost(IPaddress *address, const char *host, Uint16 port);
+
+/* Resolve an ip address to a host name in canonical form.
+   If the ip couldn't be resolved, this function returns NULL,
+   otherwise a pointer to a static buffer containing the hostname
+   is returned.  Note that this function is not thread-safe.
+*/
+extern DECLSPEC const char * SDLCALL SDLNet_ResolveIP(const IPaddress *ip);
+
+/* Get the addresses of network interfaces on this system.
+   This returns the number of addresses saved in 'addresses'
+ */
+extern DECLSPEC int SDLCALL SDLNet_GetLocalAddresses(IPaddress *addresses, int maxcount);
+
+/***********************************************************************/
+/* TCP network API                                                     */
+/***********************************************************************/
+
+typedef struct _TCPsocket *TCPsocket;
+
+/* Open a TCP network socket
+   If ip.host is INADDR_NONE or INADDR_ANY, this creates a local server
+   socket on the given port, otherwise a TCP connection to the remote
+   host and port is attempted. The address passed in should already be
+   swapped to network byte order (addresses returned from 
+   SDLNet_ResolveHost() are already in the correct form).
+   The newly created socket is returned, or NULL if there was an error.
+*/
+extern DECLSPEC TCPsocket SDLCALL SDLNet_TCP_Open(IPaddress *ip);
+
+/* Accept an incoming connection on the given server socket.
+   The newly created socket is returned, or NULL if there was an error.
+*/
+extern DECLSPEC TCPsocket SDLCALL SDLNet_TCP_Accept(TCPsocket server);
+
+/* Get the IP address of the remote system associated with the socket.
+   If the socket is a server socket, this function returns NULL.
+*/
+extern DECLSPEC IPaddress * SDLCALL SDLNet_TCP_GetPeerAddress(TCPsocket sock);
+
+/* Send 'len' bytes of 'data' over the non-server socket 'sock'
+   This function returns the actual amount of data sent.  If the return value
+   is less than the amount of data sent, then either the remote connection was
+   closed, or an unknown socket error occurred.
+*/
+extern DECLSPEC int SDLCALL SDLNet_TCP_Send(TCPsocket sock, const void *data,
+		int len);
+
+/* Receive up to 'maxlen' bytes of data over the non-server socket 'sock',
+   and store them in the buffer pointed to by 'data'.
+   This function returns the actual amount of data received.  If the return
+   value is less than or equal to zero, then either the remote connection was
+   closed, or an unknown socket error occurred.
+*/
+extern DECLSPEC int SDLCALL SDLNet_TCP_Recv(TCPsocket sock, void *data, int maxlen);
+
+/* Close a TCP network socket */
+extern DECLSPEC void SDLCALL SDLNet_TCP_Close(TCPsocket sock);
+
+
+/***********************************************************************/
+/* UDP network API                                                     */
+/***********************************************************************/
+
+/* The maximum channels on a a UDP socket */
+#define SDLNET_MAX_UDPCHANNELS	32
+/* The maximum addresses bound to a single UDP socket channel */
+#define SDLNET_MAX_UDPADDRESSES	4
+
+typedef struct _UDPsocket *UDPsocket;
+typedef struct {
+	int channel;		/* The src/dst channel of the packet */
+	Uint8 *data;		/* The packet data */
+	int len;		/* The length of the packet data */
+	int maxlen;		/* The size of the data buffer */
+	int status;		/* packet status after sending */
+	IPaddress address;		/* The source/dest address of an incoming/outgoing packet */
+} UDPpacket;
+
+/* Allocate/resize/free a single UDP packet 'size' bytes long.
+   The new packet is returned, or NULL if the function ran out of memory.
+ */
+extern DECLSPEC UDPpacket * SDLCALL SDLNet_AllocPacket(int size);
+extern DECLSPEC int SDLCALL SDLNet_ResizePacket(UDPpacket *packet, int newsize);
+extern DECLSPEC void SDLCALL SDLNet_FreePacket(UDPpacket *packet);
+
+/* Allocate/Free a UDP packet vector (array of packets) of 'howmany' packets,
+   each 'size' bytes long.
+   A pointer to the first packet in the array is returned, or NULL if the
+   function ran out of memory.
+ */
+extern DECLSPEC UDPpacket ** SDLCALL SDLNet_AllocPacketV(int howmany, int size);
+extern DECLSPEC void SDLCALL SDLNet_FreePacketV(UDPpacket **packetV);
+
+
+/* Open a UDP network socket
+   If 'port' is non-zero, the UDP socket is bound to a local port.
+   The 'port' should be given in native byte order, but is used
+   internally in network (big endian) byte order, in addresses, etc.
+   This allows other systems to send to this socket via a known port.
+*/
+extern DECLSPEC UDPsocket SDLCALL SDLNet_UDP_Open(Uint16 port);
+
+/* Set the percentage of simulated packet loss for packets sent on the socket.
+*/
+extern DECLSPEC void SDLCALL SDLNet_UDP_SetPacketLoss(UDPsocket sock, int percent);
+
+/* Bind the address 'address' to the requested channel on the UDP socket.
+   If the channel is -1, then the first unbound channel will be bound with
+   the given address as it's primary address.
+   If the channel is already bound, this new address will be added to the
+   list of valid source addresses for packets arriving on the channel.
+   If the channel is not already bound, then the address becomes the primary
+   address, to which all outbound packets on the channel are sent.
+   This function returns the channel which was bound, or -1 on error.
+*/
+extern DECLSPEC int SDLCALL SDLNet_UDP_Bind(UDPsocket sock, int channel, const IPaddress *address);
+
+/* Unbind all addresses from the given channel */
+extern DECLSPEC void SDLCALL SDLNet_UDP_Unbind(UDPsocket sock, int channel);
+
+/* Get the primary IP address of the remote system associated with the 
+   socket and channel.  If the channel is -1, then the primary IP port
+   of the UDP socket is returned -- this is only meaningful for sockets
+   opened with a specific port.
+   If the channel is not bound and not -1, this function returns NULL.
+ */
+extern DECLSPEC IPaddress * SDLCALL SDLNet_UDP_GetPeerAddress(UDPsocket sock, int channel);
+
+/* Send a vector of packets to the the channels specified within the packet.
+   If the channel specified in the packet is -1, the packet will be sent to
+   the address in the 'src' member of the packet.
+   Each packet will be updated with the status of the packet after it has 
+   been sent, -1 if the packet send failed.
+   This function returns the number of packets sent.
+*/
+extern DECLSPEC int SDLCALL SDLNet_UDP_SendV(UDPsocket sock, UDPpacket **packets, int npackets);
+
+/* Send a single packet to the specified channel.
+   If the channel specified in the packet is -1, the packet will be sent to
+   the address in the 'src' member of the packet.
+   The packet will be updated with the status of the packet after it has
+   been sent.
+   This function returns 1 if the packet was sent, or 0 on error.
+
+   NOTE:
+   The maximum size of the packet is limited by the MTU (Maximum Transfer Unit)
+   of the transport medium.  It can be as low as 250 bytes for some PPP links,
+   and as high as 1500 bytes for ethernet.
+*/
+extern DECLSPEC int SDLCALL SDLNet_UDP_Send(UDPsocket sock, int channel, UDPpacket *packet);
+
+/* Receive a vector of pending packets from the UDP socket.
+   The returned packets contain the source address and the channel they arrived
+   on.  If they did not arrive on a bound channel, the the channel will be set
+   to -1.
+   The channels are checked in highest to lowest order, so if an address is
+   bound to multiple channels, the highest channel with the source address
+   bound will be returned.
+   This function returns the number of packets read from the network, or -1
+   on error.  This function does not block, so can return 0 packets pending.
+*/
+extern DECLSPEC int SDLCALL SDLNet_UDP_RecvV(UDPsocket sock, UDPpacket **packets);
+
+/* Receive a single packet from the UDP socket.
+   The returned packet contains the source address and the channel it arrived
+   on.  If it did not arrive on a bound channel, the the channel will be set
+   to -1.
+   The channels are checked in highest to lowest order, so if an address is
+   bound to multiple channels, the highest channel with the source address
+   bound will be returned.
+   This function returns the number of packets read from the network, or -1
+   on error.  This function does not block, so can return 0 packets pending.
+*/
+extern DECLSPEC int SDLCALL SDLNet_UDP_Recv(UDPsocket sock, UDPpacket *packet);
+
+/* Close a UDP network socket */
+extern DECLSPEC void SDLCALL SDLNet_UDP_Close(UDPsocket sock);
+
+
+/***********************************************************************/
+/* Hooks for checking sockets for available data                       */
+/***********************************************************************/
+
+typedef struct _SDLNet_SocketSet *SDLNet_SocketSet;
+
+/* Any network socket can be safely cast to this socket type */
+typedef struct _SDLNet_GenericSocket {
+	int ready;
+} *SDLNet_GenericSocket;
+
+/* Allocate a socket set for use with SDLNet_CheckSockets()
+   This returns a socket set for up to 'maxsockets' sockets, or NULL if
+   the function ran out of memory.
+ */
+extern DECLSPEC SDLNet_SocketSet SDLCALL SDLNet_AllocSocketSet(int maxsockets);
+
+/* Add a socket to a set of sockets to be checked for available data */
+#define SDLNet_TCP_AddSocket(set, sock) \
+			SDLNet_AddSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock))
+#define SDLNet_UDP_AddSocket(set, sock) \
+			SDLNet_AddSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock))
+extern DECLSPEC int SDLCALL SDLNet_AddSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock);
+
+/* Remove a socket from a set of sockets to be checked for available data */
+#define SDLNet_TCP_DelSocket(set, sock) \
+			SDLNet_DelSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock))
+#define SDLNet_UDP_DelSocket(set, sock) \
+			SDLNet_DelSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock))
+extern DECLSPEC int SDLCALL SDLNet_DelSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock);
+
+/* This function checks to see if data is available for reading on the
+   given set of sockets.  If 'timeout' is 0, it performs a quick poll,
+   otherwise the function returns when either data is available for
+   reading, or the timeout in milliseconds has elapsed, which ever occurs
+   first.  This function returns the number of sockets ready for reading, 
+   or -1 if there was an error with the select() system call.
+*/
+extern DECLSPEC int SDLCALL SDLNet_CheckSockets(SDLNet_SocketSet set, Uint32 timeout);
+
+/* After calling SDLNet_CheckSockets(), you can use this function on a
+   socket that was in the socket set, to find out if data is available
+   for reading.
+*/
+#define SDLNet_SocketReady(sock) \
+		((sock != NULL) && SDL_reinterpret_cast(SDLNet_GenericSocket, sock)->ready)
+
+/* Free a set of sockets allocated by SDL_NetAllocSocketSet() */
+extern DECLSPEC void SDLCALL SDLNet_FreeSocketSet(SDLNet_SocketSet set);
+
+
+/***********************************************************************/
+/* Platform-independent data conversion functions                      */
+/***********************************************************************/
+
+/* Write a 16/32 bit value to network packet buffer */
+extern DECLSPEC void SDLCALL SDLNet_Write16(Uint16 value, void *area);
+extern DECLSPEC void SDLCALL SDLNet_Write32(Uint32 value, void *area);
+
+/* Read a 16/32 bit value from network packet buffer */
+extern DECLSPEC Uint16 SDLCALL SDLNet_Read16(void *area);
+extern DECLSPEC Uint32 SDLCALL SDLNet_Read32(void *area);
+
+/***********************************************************************/
+/* Error reporting functions                                           */
+/***********************************************************************/
+
+/* We'll use SDL's functions for error reporting */
+#define SDLNet_SetError	SDL_SetError
+#define SDLNet_GetError	SDL_GetError
+
+/* I'm eventually going to try to disentangle SDL_net from SDL, thus making
+   SDL_net an independent X-platform networking toolkit.  Not today though....
+
+extern no_parse_DECLSPEC void SDLCALL SDLNet_SetError(const char *fmt, ...);
+extern no_parse_DECLSPEC char * SDLCALL SDLNet_GetError(void);
+*/
+
+
+/* Inline macro functions to read/write network data */
+
+/* Warning, some systems have data access alignment restrictions */
+#if defined(sparc) || defined(mips)
+#define SDL_DATA_ALIGNED	1
+#endif
+#ifndef SDL_DATA_ALIGNED
+#define SDL_DATA_ALIGNED	0
+#endif
+
+/* Write a 16 bit value to network packet buffer */
+#if !SDL_DATA_ALIGNED
+#define SDLNet_Write16(value, areap)	\
+	(*SDL_reinterpret_cast(Uint16 *, areap) = SDL_SwapBE16(value))
+#else
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+#define SDLNet_Write16(value, areap)	\
+do 					\
+{					\
+	Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap);	\
+	area[0] = (value >>  8) & 0xFF;	\
+	area[1] =  value        & 0xFF;	\
+} while ( 0 )
+#else
+#define SDLNet_Write16(value, areap)	\
+do 					\
+{					\
+	Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap);	\
+	area[1] = (value >>  8) & 0xFF;	\
+	area[0] =  value        & 0xFF;	\
+} while ( 0 )
+#endif
+#endif /* !SDL_DATA_ALIGNED */
+
+/* Write a 32 bit value to network packet buffer */
+#if !SDL_DATA_ALIGNED
+#define SDLNet_Write32(value, areap) 	\
+	*SDL_reinterpret_cast(Uint32 *, areap) = SDL_SwapBE32(value);
+#else
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+#define SDLNet_Write32(value, areap) 	\
+do					\
+{					\
+	Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap);	\
+	area[0] = (value >> 24) & 0xFF;	\
+	area[1] = (value >> 16) & 0xFF;	\
+	area[2] = (value >>  8) & 0xFF;	\
+	area[3] =  value       & 0xFF;	\
+} while ( 0 )
+#else
+#define SDLNet_Write32(value, areap) 	\
+do					\
+{					\
+	Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap);	\
+	area[3] = (value >> 24) & 0xFF;	\
+	area[2] = (value >> 16) & 0xFF;	\
+	area[1] = (value >>  8) & 0xFF;	\
+	area[0] =  value       & 0xFF;	\
+} while ( 0 )
+#endif
+#endif /* !SDL_DATA_ALIGNED */
+
+/* Read a 16 bit value from network packet buffer */
+#if !SDL_DATA_ALIGNED
+#define SDLNet_Read16(areap) 		\
+	(SDL_SwapBE16(*SDL_reinterpret_cast(Uint16 *, areap)))
+#else
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+#define SDLNet_Read16(areap) 		\
+	(((SDL_reinterpret_cast(Uint8 *, areap))[0] <<  8) | (SDL_reinterpret_cast(Uint8 *, areap))[1] <<  0)
+#else
+#define SDLNet_Read16(areap) 		\
+	(((SDL_reinterpret_cast(Uint8 *, areap))[1] <<  8) | (SDL_reinterpret_cast(Uint8 *, areap))[0] <<  0)
+#endif
+#endif /* !SDL_DATA_ALIGNED */
+
+/* Read a 32 bit value from network packet buffer */
+#if !SDL_DATA_ALIGNED
+#define SDLNet_Read32(areap) 		\
+	(SDL_SwapBE32(*SDL_reinterpret_cast(Uint32 *, areap)))
+#else
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+#define SDLNet_Read32(areap) 		\
+	(((SDL_reinterpret_cast(Uint8 *, areap))[0] << 24) | ((SDL_reinterpret_cast(Uint8 *, areap))[1] << 16) | \
+	 ((SDL_reinterpret_cast(Uint8 *, areap))[2] <<  8) |  (SDL_reinterpret_cast(Uint8 *, areap))[3] <<  0)
+#else
+#define SDLNet_Read32(areap) 		\
+	(((SDL_reinterpret_cast(Uint8 *, areap))[3] << 24) | ((SDL_reinterpret_cast(Uint8 *, areap))[2] << 16) | \
+	 ((SDL_reinterpret_cast(Uint8 *, areap))[1] <<  8) |  (SDL_reinterpret_cast(Uint8 *, areap))[0] <<  0)
+#endif
+#endif /* !SDL_DATA_ALIGNED */
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* _SDL_NET_H */

libs/SDL_net/SDLnet.c

@@ -0,0 +1,269 @@
+/*
+  SDL_net:  An example cross-platform network library for use with SDL
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* $Id$ */
+
+#include <string.h>
+
+#include "SDL_endian.h"
+
+#include "SDLnetsys.h"
+#include "SDL_net.h"
+
+
+const SDL_version *SDLNet_Linked_Version(void)
+{
+	static SDL_version linked_version;
+	SDL_NET_VERSION(&linked_version);
+	return(&linked_version);
+}
+
+/* Since the UNIX/Win32/BeOS code is so different from MacOS,
+   we'll just have two completely different sections here.
+*/
+static int SDLNet_started = 0;
+
+#ifndef __USE_W32_SOCKETS
+#include <signal.h>
+#endif
+
+#ifndef __USE_W32_SOCKETS
+
+int SDLNet_GetLastError(void)
+{
+	return errno;
+}
+
+void SDLNet_SetLastError(int err)
+{
+	errno = err;
+}
+
+#endif
+
+/* Initialize/Cleanup the network API */
+int  SDLNet_Init(void)
+{
+	if ( !SDLNet_started ) {
+#ifdef __USE_W32_SOCKETS
+		/* Start up the windows networking */
+		WORD version_wanted = MAKEWORD(1,1);
+		WSADATA wsaData;
+
+		if ( WSAStartup(version_wanted, &wsaData) != 0 ) {
+			SDLNet_SetError("Couldn't initialize Winsock 1.1\n");
+			return(-1);
+		}
+#else
+		/* SIGPIPE is generated when a remote socket is closed */
+		void (*handler)(int);
+		handler = signal(SIGPIPE, SIG_IGN);
+		if ( handler != SIG_DFL ) {
+			signal(SIGPIPE, handler);
+		}
+#endif
+	}
+	++SDLNet_started;
+	return(0);
+}
+void SDLNet_Quit(void)
+{
+	if ( SDLNet_started == 0 ) {
+		return;
+	}
+	if ( --SDLNet_started == 0 ) {
+#ifdef __USE_W32_SOCKETS
+		/* Clean up windows networking */
+		if ( WSACleanup() == SOCKET_ERROR ) {
+			if ( WSAGetLastError() == WSAEINPROGRESS ) {
+#ifndef _WIN32_WCE
+				WSACancelBlockingCall();
+#endif
+				WSACleanup();
+			}
+		}
+#else
+		/* Restore the SIGPIPE handler */
+		void (*handler)(int);
+		handler = signal(SIGPIPE, SIG_DFL);
+		if ( handler != SIG_IGN ) {
+			signal(SIGPIPE, handler);
+		}
+#endif
+	}
+}
+
+/* Resolve a host name and port to an IP address in network form */
+int SDLNet_ResolveHost(IPaddress *address, const char *host, Uint16 port)
+{
+	int retval = 0;
+
+	/* Perform the actual host resolution */
+	if ( host == NULL ) {
+		address->host = INADDR_ANY;
+	} else {
+		address->host = inet_addr(host);
+		if ( address->host == INADDR_NONE ) {
+			struct hostent *hp;
+
+			hp = gethostbyname(host);
+			if ( hp ) {
+				memcpy(&address->host,hp->h_addr,hp->h_length);
+			} else {
+				retval = -1;
+			}
+		}
+	}
+	address->port = SDL_SwapBE16(port);
+
+	/* Return the status */
+	return(retval);
+}
+
+/* Resolve an ip address to a host name in canonical form.
+   If the ip couldn't be resolved, this function returns NULL,
+   otherwise a pointer to a static buffer containing the hostname
+   is returned.  Note that this function is not thread-safe.
+*/
+/* Written by Miguel Angel Blanch.
+ * Main Programmer of Arianne RPG.
+ * http://come.to/arianne_rpg
+ */
+const char *SDLNet_ResolveIP(const IPaddress *ip)
+{
+	struct hostent *hp;
+	struct in_addr in;
+
+	hp = gethostbyaddr((const char *)&ip->host, sizeof(ip->host), AF_INET);
+	if ( hp != NULL ) {
+		return hp->h_name;
+	}
+
+	in.s_addr = ip->host;
+	return inet_ntoa(in);
+}
+
+int SDLNet_GetLocalAddresses(IPaddress *addresses, int maxcount)
+{
+	int count = 0;
+#ifdef SIOCGIFCONF
+/* Defined on Mac OS X */
+#ifndef _SIZEOF_ADDR_IFREQ
+#define _SIZEOF_ADDR_IFREQ sizeof
+#endif
+	SOCKET sock;
+	struct ifconf conf;
+	char data[4096];
+	struct ifreq *ifr;
+	struct sockaddr_in *sock_addr;
+
+	sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if ( sock == INVALID_SOCKET ) {
+		return 0;
+	}
+
+	conf.ifc_len = sizeof(data);
+	conf.ifc_buf = (caddr_t) data;
+	if ( ioctl(sock, SIOCGIFCONF, &conf) < 0 ) {
+		closesocket(sock);
+		return 0;
+	}
+
+	ifr = (struct ifreq*)data;
+	while ((char*)ifr < data+conf.ifc_len) {
+		if (ifr->ifr_addr.sa_family == AF_INET) {
+			if (count < maxcount) {
+				sock_addr = (struct sockaddr_in*)&ifr->ifr_addr;
+				addresses[count].host = sock_addr->sin_addr.s_addr;
+				addresses[count].port = sock_addr->sin_port;
+			}
+			++count;
+		}
+		ifr = (struct ifreq*)((char*)ifr + _SIZEOF_ADDR_IFREQ(*ifr));
+	}
+	closesocket(sock);
+#elif defined(__WIN32__)
+    PIP_ADAPTER_INFO pAdapterInfo;
+    PIP_ADAPTER_INFO pAdapter;
+	PIP_ADDR_STRING pAddress;
+    DWORD dwRetVal = 0;
+    ULONG ulOutBufLen = sizeof (IP_ADAPTER_INFO);
+
+    pAdapterInfo = (IP_ADAPTER_INFO *) SDL_malloc(sizeof (IP_ADAPTER_INFO));
+    if (pAdapterInfo == NULL) {
+		return 0;
+    }
+
+    if ((dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == ERROR_BUFFER_OVERFLOW) {
+        pAdapterInfo = (IP_ADAPTER_INFO *) SDL_realloc(pAdapterInfo, ulOutBufLen);
+        if (pAdapterInfo == NULL) {
+			return 0;
+        }
+		dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen);
+    }
+
+    if (dwRetVal == NO_ERROR) {
+        for (pAdapter = pAdapterInfo; pAdapter; pAdapter = pAdapter->Next) {
+			for (pAddress = &pAdapterInfo->IpAddressList; pAddress; pAddress = pAddress->Next) {
+				if (count < maxcount) {
+					addresses[count].host = inet_addr(pAddress->IpAddress.String);
+					addresses[count].port = 0;
+				}
+				++count;
+			}
+        }
+    }
+	SDL_free(pAdapterInfo);
+#endif
+	return count;
+}
+
+#if !SDL_DATA_ALIGNED /* function versions for binary compatibility */
+
+/* Write a 16 bit value to network packet buffer */
+#undef SDLNet_Write16
+void   SDLNet_Write16(Uint16 value, void *areap)
+{
+	(*(Uint16 *)(areap) = SDL_SwapBE16(value));
+}
+
+/* Write a 32 bit value to network packet buffer */
+#undef SDLNet_Write32
+void   SDLNet_Write32(Uint32 value, void *areap)
+{
+	*(Uint32 *)(areap) = SDL_SwapBE32(value);
+}
+
+/* Read a 16 bit value from network packet buffer */
+#undef SDLNet_Read16
+Uint16 SDLNet_Read16(void *areap)
+{
+	return (SDL_SwapBE16(*(Uint16 *)(areap)));
+}
+
+/* Read a 32 bit value from network packet buffer */
+#undef SDLNet_Read32
+Uint32 SDLNet_Read32(void *areap)
+{
+	return (SDL_SwapBE32(*(Uint32 *)(areap)));
+}
+
+#endif /* !SDL_DATA_ALIGNED */

libs/SDL_net/SDLnetTCP.c

@@ -0,0 +1,295 @@
+/*
+  SDL_net:  An example cross-platform network library for use with SDL
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* $Id$ */
+
+#include "SDLnetsys.h"
+#include "SDL_net.h"
+
+/* The network API for TCP sockets */
+
+/* Since the UNIX/Win32/BeOS code is so different from MacOS,
+   we'll just have two completely different sections here.
+*/
+
+struct _TCPsocket {
+	int ready;
+	SOCKET channel;
+	IPaddress remoteAddress;
+	IPaddress localAddress;
+	int sflag;
+};
+
+/* Open a TCP network socket
+   If 'remote' is NULL, this creates a local server socket on the given port,
+   otherwise a TCP connection to the remote host and port is attempted.
+   The newly created socket is returned, or NULL if there was an error.
+*/
+TCPsocket SDLNet_TCP_Open(IPaddress *ip)
+{
+	TCPsocket sock;
+	struct sockaddr_in sock_addr;
+
+	/* Allocate a TCP socket structure */
+	sock = (TCPsocket)malloc(sizeof(*sock));
+	if ( sock == NULL ) {
+		SDLNet_SetError("Out of memory");
+		goto error_return;
+	}
+
+	/* Open the socket */
+	sock->channel = socket(AF_INET, SOCK_STREAM, 0);
+	if ( sock->channel == INVALID_SOCKET ) {
+		SDLNet_SetError("Couldn't create socket");
+		goto error_return;
+	}
+
+	/* Connect to remote, or bind locally, as appropriate */
+	if ( (ip->host != INADDR_NONE) && (ip->host != INADDR_ANY) ) {
+
+	// #########  Connecting to remote
+	
+		memset(&sock_addr, 0, sizeof(sock_addr));
+		sock_addr.sin_family = AF_INET;
+		sock_addr.sin_addr.s_addr = ip->host;
+		sock_addr.sin_port = ip->port;
+
+		/* Connect to the remote host */
+		if ( connect(sock->channel, (struct sockaddr *)&sock_addr,
+				sizeof(sock_addr)) == SOCKET_ERROR ) {
+			SDLNet_SetError("Couldn't connect to remote host");
+			goto error_return;
+		}
+		sock->sflag = 0;
+	} else {
+
+	// ##########  Binding locally
+
+		memset(&sock_addr, 0, sizeof(sock_addr));
+		sock_addr.sin_family = AF_INET;
+		sock_addr.sin_addr.s_addr = INADDR_ANY;
+		sock_addr.sin_port = ip->port;
+
+/*
+ * Windows gets bad mojo with SO_REUSEADDR:
+ * http://www.devolution.com/pipermail/sdl/2005-September/070491.html
+ *   --ryan.
+ */
+#ifndef WIN32
+		/* allow local address reuse */
+		{ int yes = 1;
+			setsockopt(sock->channel, SOL_SOCKET, SO_REUSEADDR, (char*)&yes, sizeof(yes));
+		}
+#endif
+
+		/* Bind the socket for listening */
+		if ( bind(sock->channel, (struct sockaddr *)&sock_addr,
+				sizeof(sock_addr)) == SOCKET_ERROR ) {
+			SDLNet_SetError("Couldn't bind to local port");
+			goto error_return;
+		}
+		if ( listen(sock->channel, 5) == SOCKET_ERROR ) {
+			SDLNet_SetError("Couldn't listen to local port");
+			goto error_return;
+		}
+
+		/* Set the socket to non-blocking mode for accept() */
+#if defined(__BEOS__) && defined(SO_NONBLOCK)
+		/* On BeOS r5 there is O_NONBLOCK but it's for files only */
+		{
+			long b = 1;
+			setsockopt(sock->channel, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
+		}
+#elif defined(O_NONBLOCK)
+		{
+			fcntl(sock->channel, F_SETFL, O_NONBLOCK);
+		}
+#elif defined(WIN32)
+		{
+			unsigned long mode = 1;
+			ioctlsocket (sock->channel, FIONBIO, &mode);
+		}
+#elif defined(__OS2__)
+		{
+			int dontblock = 1;
+			ioctl(sock->channel, FIONBIO, &dontblock);
+		}
+#else
+#warning How do we set non-blocking mode on other operating systems?
+#endif
+		sock->sflag = 1;
+	}
+	sock->ready = 0;
+
+#ifdef TCP_NODELAY
+	/* Set the nodelay TCP option for real-time games */
+	{ int yes = 1;
+	setsockopt(sock->channel, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes));
+	}
+#endif /* TCP_NODELAY */
+
+	/* Fill in the channel host address */
+	sock->remoteAddress.host = sock_addr.sin_addr.s_addr;
+	sock->remoteAddress.port = sock_addr.sin_port;
+
+	/* The socket is ready */
+	return(sock);
+
+error_return:
+	SDLNet_TCP_Close(sock);
+	return(NULL);
+}
+
+/* Accept an incoming connection on the given server socket.
+   The newly created socket is returned, or NULL if there was an error.
+*/
+TCPsocket SDLNet_TCP_Accept(TCPsocket server)
+{
+	TCPsocket sock;
+	struct sockaddr_in sock_addr;
+	socklen_t sock_alen;
+
+	/* Only server sockets can accept */
+	if ( ! server->sflag ) {
+		SDLNet_SetError("Only server sockets can accept()");
+		return(NULL);
+	}
+	server->ready = 0;
+
+	/* Allocate a TCP socket structure */
+	sock = (TCPsocket)malloc(sizeof(*sock));
+	if ( sock == NULL ) {
+		SDLNet_SetError("Out of memory");
+		goto error_return;
+	}
+
+	/* Accept a new TCP connection on a server socket */
+	sock_alen = sizeof(sock_addr);
+	sock->channel = accept(server->channel, (struct sockaddr *)&sock_addr,
+								&sock_alen);
+	if ( sock->channel == INVALID_SOCKET ) {
+		SDLNet_SetError("accept() failed");
+		goto error_return;
+	}
+#ifdef WIN32
+	{
+		/* passing a zero value, socket mode set to block on */
+		unsigned long mode = 0;
+		ioctlsocket (sock->channel, FIONBIO, &mode);
+	}
+#elif defined(O_NONBLOCK)
+	{
+		int flags = fcntl(sock->channel, F_GETFL, 0);
+		fcntl(sock->channel, F_SETFL, flags & ~O_NONBLOCK);
+	}
+#endif /* WIN32 */
+	sock->remoteAddress.host = sock_addr.sin_addr.s_addr;
+	sock->remoteAddress.port = sock_addr.sin_port;
+
+	sock->sflag = 0;
+	sock->ready = 0;
+
+	/* The socket is ready */
+	return(sock);
+
+error_return:
+	SDLNet_TCP_Close(sock);
+	return(NULL);
+}
+
+/* Get the IP address of the remote system associated with the socket.
+   If the socket is a server socket, this function returns NULL.
+*/
+IPaddress *SDLNet_TCP_GetPeerAddress(TCPsocket sock)
+{
+	if ( sock->sflag ) {
+		return(NULL);
+	}
+	return(&sock->remoteAddress);
+}
+
+/* Send 'len' bytes of 'data' over the non-server socket 'sock'
+   This function returns the actual amount of data sent.  If the return value
+   is less than the amount of data sent, then either the remote connection was
+   closed, or an unknown socket error occurred.
+*/
+int SDLNet_TCP_Send(TCPsocket sock, const void *datap, int len)
+{
+	const Uint8 *data = (const Uint8 *)datap;	/* For pointer arithmetic */
+	int sent, left;
+
+	/* Server sockets are for accepting connections only */
+	if ( sock->sflag ) {
+		SDLNet_SetError("Server sockets cannot send");
+		return(-1);
+	}
+
+	/* Keep sending data until it's sent or an error occurs */
+	left = len;
+	sent = 0;
+	SDLNet_SetLastError(0);
+	do {
+		len = send(sock->channel, (const char *) data, left, 0);
+		if ( len > 0 ) {
+			sent += len;
+			left -= len;
+			data += len;
+		}
+	} while ( (left > 0) && ((len > 0) || (SDLNet_GetLastError() == EINTR)) );
+
+	return(sent);
+}
+
+/* Receive up to 'maxlen' bytes of data over the non-server socket 'sock',
+   and store them in the buffer pointed to by 'data'.
+   This function returns the actual amount of data received.  If the return
+   value is less than or equal to zero, then either the remote connection was
+   closed, or an unknown socket error occurred.
+*/
+int SDLNet_TCP_Recv(TCPsocket sock, void *data, int maxlen)
+{
+	int len;
+
+	/* Server sockets are for accepting connections only */
+	if ( sock->sflag ) {
+		SDLNet_SetError("Server sockets cannot receive");
+		return(-1);
+	}
+
+	SDLNet_SetLastError(0);
+	do {
+		len = recv(sock->channel, (char *) data, maxlen, 0);
+	} while ( SDLNet_GetLastError() == EINTR );
+
+	sock->ready = 0;
+	return(len);
+}
+
+/* Close a TCP network socket */
+void SDLNet_TCP_Close(TCPsocket sock)
+{
+	if ( sock != NULL ) {
+		if ( sock->channel != INVALID_SOCKET ) {
+			closesocket(sock->channel);
+		}
+		free(sock);
+	}
+}

libs/SDL_net/SDLnetUDP.c

@@ -0,0 +1,528 @@
+/*
+  SDL_net:  An example cross-platform network library for use with SDL
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* $Id$ */
+
+#include "SDLnetsys.h"
+#include "SDL_net.h"
+
+#ifdef __WIN32__
+#define srandom	srand
+#define random	rand
+#endif
+
+struct UDP_channel {
+	int numbound;
+	IPaddress address[SDLNET_MAX_UDPADDRESSES];
+};
+
+struct _UDPsocket {
+	int ready;
+	SOCKET channel;
+	IPaddress address;
+
+	struct UDP_channel binding[SDLNET_MAX_UDPCHANNELS];
+
+	/* For debugging purposes */
+	int packetloss;
+};
+
+/* Allocate/free a single UDP packet 'size' bytes long.
+   The new packet is returned, or NULL if the function ran out of memory.
+ */
+extern UDPpacket *SDLNet_AllocPacket(int size)
+{
+	UDPpacket *packet;
+	int error;
+
+
+	error = 1;
+	packet = (UDPpacket *)malloc(sizeof(*packet));
+	if ( packet != NULL ) {
+		packet->maxlen = size;
+		packet->data = (Uint8 *)malloc(size);
+		if ( packet->data != NULL ) {
+			error = 0;
+		}
+	}
+	if ( error ) {
+		SDLNet_SetError("Out of memory");
+		SDLNet_FreePacket(packet);
+		packet = NULL;
+	}
+	return(packet);
+}
+int SDLNet_ResizePacket(UDPpacket *packet, int newsize)
+{
+	Uint8 *newdata;
+
+	newdata = (Uint8 *)malloc(newsize);
+	if ( newdata != NULL ) {
+		free(packet->data);
+		packet->data = newdata;
+		packet->maxlen = newsize;
+	}
+	return(packet->maxlen);
+}
+extern void SDLNet_FreePacket(UDPpacket *packet)
+{
+	if ( packet ) {
+		if ( packet->data )
+			free(packet->data);
+		free(packet);
+	}
+}
+
+/* Allocate/Free a UDP packet vector (array of packets) of 'howmany' packets,
+   each 'size' bytes long.
+   A pointer to the packet array is returned, or NULL if the function ran out
+   of memory.
+ */
+UDPpacket **SDLNet_AllocPacketV(int howmany, int size)
+{
+	UDPpacket **packetV;
+
+	packetV = (UDPpacket **)malloc((howmany+1)*sizeof(*packetV));
+	if ( packetV != NULL ) {
+		int i;
+		for ( i=0; i<howmany; ++i ) {
+			packetV[i] = SDLNet_AllocPacket(size);
+			if ( packetV[i] == NULL ) {
+				break;
+			}
+		}
+		packetV[i] = NULL;
+
+		if ( i != howmany ) {
+			SDLNet_SetError("Out of memory");
+			SDLNet_FreePacketV(packetV);
+			packetV = NULL;
+		}
+	}
+	return(packetV);
+}
+void SDLNet_FreePacketV(UDPpacket **packetV)
+{
+	if ( packetV ) {
+		int i;
+		for ( i=0; packetV[i]; ++i ) {
+			SDLNet_FreePacket(packetV[i]);
+		}
+		free(packetV);
+	}
+}
+
+/* Since the UNIX/Win32/BeOS code is so different from MacOS,
+   we'll just have two completely different sections here.
+*/
+
+/* Open a UDP network socket
+   If 'port' is non-zero, the UDP socket is bound to a fixed local port.
+*/
+UDPsocket SDLNet_UDP_Open(Uint16 port)
+{
+	UDPsocket sock;
+	struct sockaddr_in sock_addr;
+	socklen_t sock_len;
+
+	/* Allocate a UDP socket structure */
+	sock = (UDPsocket)malloc(sizeof(*sock));
+	if ( sock == NULL ) {
+		SDLNet_SetError("Out of memory");
+		goto error_return;
+	}
+	memset(sock, 0, sizeof(*sock));
+	memset(&sock_addr, 0, sizeof(sock_addr));
+	
+	/* Open the socket */
+	sock->channel = socket(AF_INET, SOCK_DGRAM, 0);
+	if ( sock->channel == INVALID_SOCKET ) 
+	{
+		SDLNet_SetError("Couldn't create socket");
+		goto error_return;
+	}
+
+	/* Bind locally, if appropriate */
+	sock_addr.sin_family = AF_INET;
+	sock_addr.sin_addr.s_addr = INADDR_ANY;
+	sock_addr.sin_port = SDL_SwapBE16(port);
+
+	/* Bind the socket for listening */
+	if ( bind(sock->channel, (struct sockaddr *)&sock_addr,
+			sizeof(sock_addr)) == SOCKET_ERROR ) {
+		SDLNet_SetError("Couldn't bind to local port");
+		goto error_return;
+	}
+
+	/* Get the bound address and port */
+	sock_len = sizeof(sock_addr);
+	if ( getsockname(sock->channel, (struct sockaddr *)&sock_addr, &sock_len) < 0 ) {
+perror("getsockname");
+		SDLNet_SetError("Couldn't get socket address");
+		goto error_return;
+	}
+
+	/* Fill in the channel host address */
+	sock->address.host = sock_addr.sin_addr.s_addr;
+	sock->address.port = sock_addr.sin_port;
+
+#ifdef SO_BROADCAST
+	/* Allow LAN broadcasts with the socket */
+	{ int yes = 1;
+		setsockopt(sock->channel, SOL_SOCKET, SO_BROADCAST, (char*)&yes, sizeof(yes));
+	}
+#endif
+#ifdef IP_ADD_MEMBERSHIP
+	/* Receive LAN multicast packets on 224.0.0.1
+	   This automatically works on Mac OS X, Linux and BSD, but needs
+	   this code on Windows.
+	*/
+	/* A good description of multicast can be found here:
+		http://www.docs.hp.com/en/B2355-90136/ch05s05.html
+	*/
+	/* FIXME: Add support for joining arbitrary groups to the API */
+	{
+		struct ip_mreq	g;
+
+		g.imr_multiaddr.s_addr = inet_addr("224.0.0.1");
+		g.imr_interface.s_addr = INADDR_ANY;
+		setsockopt(sock->channel, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+			   (char*)&g, sizeof(g));
+	}
+#endif
+
+	/* The socket is ready */
+	
+	return(sock);
+
+error_return:
+	SDLNet_UDP_Close(sock);
+	
+	return(NULL);
+}
+
+void SDLNet_UDP_SetPacketLoss(UDPsocket sock, int percent)
+{
+	/* FIXME: We may want this behavior to be reproducible
+		  but there isn't a portable reentrant random
+		  number generator with good randomness.
+	*/
+	srandom(SDL_GetTicks());
+
+	if (percent < 0) {
+		percent = 0;
+	} else if (percent > 100) {
+		percent = 100;
+	}
+	sock->packetloss = percent;
+}
+
+/* Verify that the channel is in the valid range */
+static int ValidChannel(int channel)
+{
+	if ( (channel < 0) || (channel >= SDLNET_MAX_UDPCHANNELS) ) {
+		SDLNet_SetError("Invalid channel");
+		return(0);
+	}
+	return(1);
+}
+
+/* Bind the address 'address' to the requested channel on the UDP socket.
+   If the channel is -1, then the first unbound channel will be bound with
+   the given address as it's primary address.
+   If the channel is already bound, this new address will be added to the
+   list of valid source addresses for packets arriving on the channel.
+   If the channel is not already bound, then the address becomes the primary
+   address, to which all outbound packets on the channel are sent.
+   This function returns the channel which was bound, or -1 on error.
+*/
+int SDLNet_UDP_Bind(UDPsocket sock, int channel, const IPaddress *address)
+{
+	struct UDP_channel *binding;
+
+	if ( sock == NULL ) {
+		SDLNet_SetError("Passed a NULL socket");
+		return(-1);
+	}
+
+	if ( channel == -1 ) {
+		for ( channel=0; channel < SDLNET_MAX_UDPCHANNELS; ++channel ) {
+			binding = &sock->binding[channel];
+			if ( binding->numbound < SDLNET_MAX_UDPADDRESSES ) {
+				break;
+			}
+		}
+	} else {
+		if ( ! ValidChannel(channel) ) {
+			return(-1);
+		}
+		binding = &sock->binding[channel];
+	}
+	if ( binding->numbound == SDLNET_MAX_UDPADDRESSES ) {
+		SDLNet_SetError("No room for new addresses");
+		return(-1);
+	}
+	binding->address[binding->numbound++] = *address;
+	return(channel);
+}
+
+/* Unbind all addresses from the given channel */
+void SDLNet_UDP_Unbind(UDPsocket sock, int channel)
+{
+	if ( (channel >= 0) && (channel < SDLNET_MAX_UDPCHANNELS) ) {
+		sock->binding[channel].numbound = 0;
+	}
+}
+
+/* Get the primary IP address of the remote system associated with the
+   socket and channel.
+   If the channel is not bound, this function returns NULL.
+ */
+IPaddress *SDLNet_UDP_GetPeerAddress(UDPsocket sock, int channel)
+{
+	IPaddress *address;
+
+	address = NULL;
+	switch (channel) {
+		case -1:
+			/* Return the actual address of the socket */
+			address = &sock->address;
+			break;
+		default:
+			/* Return the address of the bound channel */
+			if ( ValidChannel(channel) &&
+				(sock->binding[channel].numbound > 0) ) {
+				address = &sock->binding[channel].address[0];
+			}
+			break;
+	}
+	return(address);
+}
+
+/* Send a vector of packets to the the channels specified within the packet.
+   If the channel specified in the packet is -1, the packet will be sent to
+   the address in the 'src' member of the packet.
+   Each packet will be updated with the status of the packet after it has 
+   been sent, -1 if the packet send failed.
+   This function returns the number of packets sent.
+*/
+int SDLNet_UDP_SendV(UDPsocket sock, UDPpacket **packets, int npackets)
+{
+	int numsent, i, j;
+	struct UDP_channel *binding;
+	int status;
+	int sock_len;
+	struct sockaddr_in sock_addr;
+
+	if ( sock == NULL ) {
+		SDLNet_SetError("Passed a NULL socket");
+		return(0);
+	}
+
+	/* Set up the variables to send packets */
+	sock_len = sizeof(sock_addr);
+
+	numsent = 0;
+	for ( i=0; i<npackets; ++i ) 
+	{
+		/* Simulate packet loss, if desired */
+		if (sock->packetloss) {
+			if ((random()%100) <= sock->packetloss) {
+				packets[i]->status = packets[i]->len;
+				++numsent;
+				continue;
+			}
+		}
+
+		/* if channel is < 0, then use channel specified in sock */
+		
+		if ( packets[i]->channel < 0 ) 
+		{
+			sock_addr.sin_addr.s_addr = packets[i]->address.host;
+			sock_addr.sin_port = packets[i]->address.port;
+			sock_addr.sin_family = AF_INET;
+			status = sendto(sock->channel, 
+					packets[i]->data, packets[i]->len, 0,
+					(struct sockaddr *)&sock_addr,sock_len);
+			if ( status >= 0 )
+			{
+				packets[i]->status = status;
+				++numsent;
+			}
+		}
+		else 
+		{
+			/* Send to each of the bound addresses on the channel */
+#ifdef DEBUG_NET
+			printf("SDLNet_UDP_SendV sending packet to channel = %d\n", packets[i]->channel );
+#endif
+			
+			binding = &sock->binding[packets[i]->channel];
+			
+			for ( j=binding->numbound-1; j>=0; --j ) 
+			{
+				sock_addr.sin_addr.s_addr = binding->address[j].host;
+				sock_addr.sin_port = binding->address[j].port;
+				sock_addr.sin_family = AF_INET;
+				status = sendto(sock->channel, 
+						packets[i]->data, packets[i]->len, 0,
+						(struct sockaddr *)&sock_addr,sock_len);
+				if ( status >= 0 )
+				{
+					packets[i]->status = status;
+					++numsent;
+				}
+			}
+		}
+	}
+	
+	return(numsent);
+}
+
+int SDLNet_UDP_Send(UDPsocket sock, int channel, UDPpacket *packet)
+{
+	/* This is silly, but... */
+	packet->channel = channel;
+	return(SDLNet_UDP_SendV(sock, &packet, 1));
+}
+
+/* Returns true if a socket is has data available for reading right now */
+static int SocketReady(SOCKET sock)
+{
+	int retval = 0;
+	struct timeval tv;
+	fd_set mask;
+
+	/* Check the file descriptors for available data */
+	do {
+		SDLNet_SetLastError(0);
+
+		/* Set up the mask of file descriptors */
+		FD_ZERO(&mask);
+		FD_SET(sock, &mask);
+
+		/* Set up the timeout */
+		tv.tv_sec = 0;
+		tv.tv_usec = 0;
+
+		/* Look! */
+		retval = select(sock+1, &mask, NULL, NULL, &tv);
+	} while ( SDLNet_GetLastError() == EINTR );
+
+	return(retval == 1);
+}
+
+/* Receive a vector of pending packets from the UDP socket.
+   The returned packets contain the source address and the channel they arrived
+   on.  If they did not arrive on a bound channel, the the channel will be set
+   to -1.
+   This function returns the number of packets read from the network, or -1
+   on error.  This function does not block, so can return 0 packets pending.
+*/
+extern int SDLNet_UDP_RecvV(UDPsocket sock, UDPpacket **packets)
+{
+	int numrecv, i, j;
+	struct UDP_channel *binding;
+	socklen_t sock_len;
+	struct sockaddr_in sock_addr;
+
+	if ( sock == NULL ) {
+		return(0);
+	}
+
+	numrecv = 0;
+	while ( packets[numrecv] && SocketReady(sock->channel) ) 
+	{
+		UDPpacket *packet;
+
+		packet = packets[numrecv];
+		
+		sock_len = sizeof(sock_addr);
+		packet->status = recvfrom(sock->channel,
+				packet->data, packet->maxlen, 0,
+				(struct sockaddr *)&sock_addr,
+						&sock_len);
+		if ( packet->status >= 0 ) {
+			packet->len = packet->status;
+			packet->address.host = sock_addr.sin_addr.s_addr;
+			packet->address.port = sock_addr.sin_port;
+			packet->channel = -1;
+			
+			for (i=(SDLNET_MAX_UDPCHANNELS-1); i>=0; --i ) 
+			{
+				binding = &sock->binding[i];
+				
+				for ( j=binding->numbound-1; j>=0; --j ) 
+				{
+					if ( (packet->address.host == binding->address[j].host) &&
+					     (packet->address.port == binding->address[j].port) ) 
+					{
+						packet->channel = i;
+						goto foundit; /* break twice */
+					}
+				}
+			}
+foundit:
+			++numrecv;
+		} 
+		
+		else 
+		{
+			packet->len = 0;
+		}
+	}
+	
+	sock->ready = 0;
+	
+	return(numrecv);
+}
+
+/* Receive a single packet from the UDP socket.
+   The returned packet contains the source address and the channel it arrived
+   on.  If it did not arrive on a bound channel, the the channel will be set
+   to -1.
+   This function returns the number of packets read from the network, or -1
+   on error.  This function does not block, so can return 0 packets pending.
+*/
+int SDLNet_UDP_Recv(UDPsocket sock, UDPpacket *packet)
+{
+	UDPpacket *packets[2];
+
+	/* Receive a packet array of 1 */
+	packets[0] = packet;
+	packets[1] = NULL;
+	return(SDLNet_UDP_RecvV(sock, packets));
+}
+
+/* Close a UDP network socket */
+extern void SDLNet_UDP_Close(UDPsocket sock)
+{
+	if ( sock != NULL ) 
+	{
+		if ( sock->channel != INVALID_SOCKET ) 
+		{
+			closesocket(sock->channel);
+		}
+		
+		free(sock);
+	}
+}
+

libs/SDL_net/SDLnetselect.c

@@ -0,0 +1,163 @@
+/*
+  SDL_net:  An example cross-platform network library for use with SDL
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* $Id$ */
+
+#include "SDLnetsys.h"
+#include "SDL_net.h"
+
+/* The select() API for network sockets */
+
+struct SDLNet_Socket {
+	int ready;
+	SOCKET channel;
+};
+
+struct _SDLNet_SocketSet {
+	int numsockets;
+	int maxsockets;
+	struct SDLNet_Socket **sockets;
+};
+
+/* Allocate a socket set for use with SDLNet_CheckSockets() 
+   This returns a socket set for up to 'maxsockets' sockets, or NULL if 
+   the function ran out of memory. 
+ */
+SDLNet_SocketSet SDLNet_AllocSocketSet(int maxsockets)
+{
+	struct _SDLNet_SocketSet *set;
+	int i;
+
+	set = (struct _SDLNet_SocketSet *)malloc(sizeof(*set));
+	if ( set != NULL ) {
+		set->numsockets = 0;
+		set->maxsockets = maxsockets;
+		set->sockets = (struct SDLNet_Socket **)malloc
+					(maxsockets*sizeof(*set->sockets));
+		if ( set->sockets != NULL ) {
+			for ( i=0; i<maxsockets; ++i ) {
+				set->sockets[i] = NULL;
+			}
+		} else {
+			free(set);
+			set = NULL;
+		}
+	}
+	return(set);
+}
+
+/* Add a socket to a set of sockets to be checked for available data */
+int SDLNet_AddSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock)
+{
+	if ( sock != NULL ) {
+		if ( set->numsockets == set->maxsockets ) {
+			SDLNet_SetError("socketset is full");
+			return(-1);
+		}
+		set->sockets[set->numsockets++] = (struct SDLNet_Socket *)sock;
+	}
+	return(set->numsockets);
+}
+
+/* Remove a socket from a set of sockets to be checked for available data */
+int SDLNet_DelSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock)
+{
+	int i;
+
+	if ( sock != NULL ) {
+		for ( i=0; i<set->numsockets; ++i ) {
+			if ( set->sockets[i] == (struct SDLNet_Socket *)sock ) {
+				break;
+			}
+		}
+		if ( i == set->numsockets ) {
+			SDLNet_SetError("socket not found in socketset");
+			return(-1);
+		}
+		--set->numsockets;
+		for ( ; i<set->numsockets; ++i ) {
+			set->sockets[i] = set->sockets[i+1];
+		}
+	}
+	return(set->numsockets);
+}
+
+/* This function checks to see if data is available for reading on the
+   given set of sockets.  If 'timeout' is 0, it performs a quick poll,
+   otherwise the function returns when either data is available for
+   reading, or the timeout in milliseconds has elapsed, which ever occurs
+   first.  This function returns the number of sockets ready for reading,
+   or -1 if there was an error with the select() system call.
+*/
+int SDLNet_CheckSockets(SDLNet_SocketSet set, Uint32 timeout)
+{
+	int i;
+	SOCKET maxfd;
+	int retval;
+	struct timeval tv;
+	fd_set mask;
+
+	/* Find the largest file descriptor */
+	maxfd = 0;
+	for ( i=set->numsockets-1; i>=0; --i ) {
+		if ( set->sockets[i]->channel > maxfd ) {
+			maxfd = set->sockets[i]->channel;
+		}
+	}
+
+	/* Check the file descriptors for available data */
+	do {
+		SDLNet_SetLastError(0);
+
+		/* Set up the mask of file descriptors */
+		FD_ZERO(&mask);
+		for ( i=set->numsockets-1; i>=0; --i ) {
+			FD_SET(set->sockets[i]->channel, &mask);
+		}
+
+		/* Set up the timeout */
+		tv.tv_sec = timeout/1000;
+		tv.tv_usec = (timeout%1000)*1000;
+
+		/* Look! */
+		retval = select(maxfd+1, &mask, NULL, NULL, &tv);
+	} while ( SDLNet_GetLastError() == EINTR );
+
+	/* Mark all file descriptors ready that have data available */
+	if ( retval > 0 ) {
+		for ( i=set->numsockets-1; i>=0; --i ) {
+			if ( FD_ISSET(set->sockets[i]->channel, &mask) ) {
+				set->sockets[i]->ready = 1;
+			}
+		}
+	}
+	return(retval);
+}
+ 
+/* Free a set of sockets allocated by SDL_NetAllocSocketSet() */
+extern void SDLNet_FreeSocketSet(SDLNet_SocketSet set)
+{
+	if ( set ) {
+		free(set->sockets);
+		free(set);
+	}
+}
+

libs/SDL_net/SDLnetsys.h

@@ -0,0 +1,94 @@
+/*
+  SDL_net:  An example cross-platform network library for use with SDL
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* $Id$ */
+
+/* Include normal system headers */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef _WIN32_WCE
+#include <errno.h>
+#endif
+
+/* Include system network headers */
+#if defined(__WIN32__) || defined(WIN32)
+#define __USE_W32_SOCKETS
+#ifdef _WIN64
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <winsock.h>
+/* NOTE: windows socklen_t is signed
+ * and is defined only for winsock2. */
+typedef int socklen_t;
+#endif /* W64 */
+#include <iphlpapi.h>
+#else /* UNIX */
+#include <sys/types.h>
+#ifdef __FreeBSD__
+#include <sys/socket.h>
+#endif
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <netinet/in.h>
+#ifndef __BEOS__
+#include <arpa/inet.h>
+#endif
+#ifdef linux /* FIXME: what other platforms have this? */
+#include <netinet/tcp.h>
+#endif
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netdb.h>
+#endif /* WIN32 */
+
+/* FIXME: What platforms need this? */
+#if 0
+typedef Uint32 socklen_t;
+#endif
+
+/* System-dependent definitions */
+#ifndef __USE_W32_SOCKETS
+#ifdef __OS2__
+#define closesocket     soclose
+#else  /* !__OS2__ */
+#define closesocket	close
+#endif /* __OS2__ */
+#define SOCKET	int
+#define INVALID_SOCKET	-1
+#define SOCKET_ERROR	-1
+#endif /* __USE_W32_SOCKETS */
+
+#ifdef __USE_W32_SOCKETS
+#define SDLNet_GetLastError WSAGetLastError
+#define SDLNet_SetLastError WSASetLastError
+#ifndef EINTR
+#define EINTR WSAEINTR
+#endif
+#else
+int SDLNet_GetLastError(void);
+void SDLNet_SetLastError(int err);
+#endif
+

server/makefile

@@ -0,0 +1,19 @@
+CXXFLAGS+=-std=c++11
+DFLAGS=-DDEBUG
+LIB=-lmingw32 -lSDL_net -lSDLmain -lSDL -lwsock32 -liphlpapi
+OBJ=
+SRC=server.cpp
+
+all: debug
+
+release: $(OBJ)
+	$(CXX) $(CXXFLAGS) $(SRC) $(OBJ) $(LIB)
+
+debug: $(OBJ)
+	$(CXX) $(CXXFLAGS) $(DFLAGS) $(SRC) $(OBJ) $(LIB)
+
+clean:
+	-$(RM) *.o *.a *.exe
+
+unit:
+	$(CXX) $(CXXFLAGS) unit.cpp

server/server.cpp

@@ -0,0 +1,8 @@
+#include "SDL/SDL.h"
+#include "SDL_net/SDL_net.h"
+
+#include <iostream>
+
+int SDL_main(int, char**) {
+	return 0;
+}