1

#include "stdafx.h"

     2

#include "map.h"

     3

#include "network_data.h"

     4

     5

#if defined(WITH_REV)

     6

	extern const char _openttd_revision[];

     7

#elif defined(WITH_REV_HACK)

     8

	#define WITH_REV

     9

	const char _openttd_revision[] = WITH_REV_HACK;

    10

#else

    11

	const char _openttd_revision[] = NOREV_STRING;

    12

#endif

    13

    14

    15

#ifdef ENABLE_NETWORK

    16

    17

#include "table/strings.h"

    18

#include "network_client.h"

    19

#include "network_server.h"

    20

#include "network_udp.h"

    21

#include "network_gamelist.h"

    22

#include "console.h" /* IConsoleCmdExec */

    23

#include <stdarg.h> /* va_list */

    24

#include "md5.h"

    25

    26

#ifdef __MORPHOS__

    27

// the library base is required here

    28

struct Library *SocketBase = NULL;

    29

#endif

    30

    31

// The listen socket for the server

    32

static SOCKET _listensocket;

    33

    34

// Network copy of patches, so the patches of a client are not fucked up

    35

//  after he joined a server

    36

static Patches network_tmp_patches;

    37

    38

// The amount of clients connected

    39

static byte _network_clients_connected = 0;

    40

// The index counter for new clients (is never decreased)

    41

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    42

    43

/* Some externs / forwards */

    44

extern void ShowJoinStatusWindow();

    45

extern void StateGameLoop();

    46

extern uint GetCurrentCurrencyRate();

    47

    48

// Function that looks up the CI for a given client-index

    49

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    50

{

    51

	NetworkClientInfo *ci;

    52

    53

	for (ci = _network_client_info; ci != &_network_client_info[MAX_CLIENT_INFO]; ci++)

    54

		if (ci->client_index == client_index)

    55

			return ci;

    56

    57

	return NULL;

    58

}

    59

    60

// Function that looks up the CS for a given client-index

    61

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    62

{

    63

	NetworkClientState *cs;

    64

    65

	for (cs = _clients; cs != &_clients[MAX_CLIENT_INFO]; cs++)

    66

		if (cs->index == client_index)

    67

			return cs;

    68

    69

	return NULL;

    70

}

    71

    72

// NetworkGetClientName is a server-safe function to get the name of the client

    73

//  if the user did not send it yet, Client #<no> is used.

    74

void NetworkGetClientName(char *client_name, size_t size, const NetworkClientState *cs)

    75

{

    76

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    77

	if (ci->client_name[0] == '\0')

    78

		snprintf(client_name, size, "Client #%d", cs->index);

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	else

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		snprintf(client_name, size, "%s", ci->client_name);

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}

    82

    83

// This puts a text-message to the console, or in the future, the chat-box,

    84

//  (to keep it all a bit more general)

    85

// If 'self_send' is true, this is the client who is sending the message

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void CDECL NetworkTextMessage(NetworkAction action, uint16 color, bool self_send, const char *name, const char *str, ...)

    87

{

    88

	char buf[1024];

    89

	va_list va;

    90

	const int duration = 10; // Game days the messages stay visible

    91

	char message[1024];

    92

	char temp[1024];

    93

	StringID TempStr = STR_NULL;

    94

    95

	va_start(va, str);

    96

	vsprintf(buf, str, va);

    97

	va_end(va);

    98

    99

	switch (action) {

   100

		case NETWORK_ACTION_JOIN:

   101

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   102

			snprintf(message, sizeof(message), "*** %s %s", name, temp);

   103

			break;

   104

		case NETWORK_ACTION_LEAVE:

   105

			GetString(temp, STR_NETWORK_ERR_LEFT);

   106

			snprintf(message, sizeof(message), "*** %s %s (%s)", name, temp, buf);

   107

			break;

   108

		case NETWORK_ACTION_GIVE_MONEY:

   109

			if (self_send) {

   110

				TempStr = AllocateName(name, 0);

   111

				SetDParam(0, TempStr);

   112

				SetDParam(1, atoi(buf));

   113

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   114

				DeleteName(TempStr);

   115

				snprintf(message, sizeof(message), "*** %s", temp);

   116

			} else {

   117

				SetDParam(0, atoi(buf));

   118

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   119

				snprintf(message, sizeof(message), "*** %s %s", name, temp);

   120

			}

   121

			break;

   122

		case NETWORK_ACTION_CHAT_PLAYER:

   123

			if (self_send) {

   124

				TempStr = AllocateName(name, 0);

   125

				SetDParam(0, TempStr);

   126

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   127

				DeleteName(TempStr);

   128

				snprintf(message, sizeof(message), "%s %s", temp, buf);

   129

			} else {

   130

				TempStr = AllocateName(name, 0);

   131

				SetDParam(0, TempStr);

   132

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   133

				DeleteName(TempStr);

   134

				snprintf(message, sizeof(message), "%s %s", temp, buf);

   135

			}

   136

			break;

   137

		case NETWORK_ACTION_CHAT_CLIENT:

   138

			if (self_send) {

   139

				TempStr = AllocateName(name, 0);

   140

				SetDParam(0, TempStr);

   141

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   142

				DeleteName(TempStr);

   143

				snprintf(message, sizeof(message), "%s %s", temp, buf);

   144

			} else {

   145

				TempStr = AllocateName(name, 0);

   146

				SetDParam(0, TempStr);

   147

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   148

				DeleteName(TempStr);

   149

				snprintf(message, sizeof(message), "%s %s", temp, buf);

   150

			}

   151

			break;

   152

		case NETWORK_ACTION_NAME_CHANGE:

   153

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   154

			snprintf(message, sizeof(message), "*** %s %s %s", name, temp, buf);

   155

			break;

   156

		default:

   157

			TempStr = AllocateName(name, 0);

   158

			SetDParam(0, TempStr);

   159

			GetString(temp, STR_NETWORK_CHAT_ALL);

   160

			DeleteName(TempStr);

   161

			snprintf(message, sizeof(message), "%s %s", temp, buf);

   162

			break;

   163

	}

   164

   165

	IConsolePrintF(color, "%s", message);

   166

	AddTextMessage(color, duration, "%s", message);

   167

}

   168

   169

// Calculate the frame-lag of a client

   170

uint NetworkCalculateLag(const NetworkClientState *cs)

   171

{

   172

	int lag = cs->last_frame_server - cs->last_frame;

   173

	// This client has missed his ACK packet after 1 DAY_TICKS..

   174

	//  so we increase his lag for every frame that passes!

   175

	// The packet can be out by a max of _net_frame_freq

   176

	if (cs->last_frame_server + DAY_TICKS + _network_frame_freq < _frame_counter)

   177

		lag += _frame_counter - (cs->last_frame_server + DAY_TICKS + _network_frame_freq);

   178

   179

	return lag;

   180

}

   181

   182

   183

// There was a non-recoverable error, drop back to the main menu with a nice

   184

//  error

   185

void NetworkError(StringID error_string)

   186

{

   187

	_switch_mode = SM_MENU;

   188

	_switch_mode_errorstr = error_string;

   189

}

   190

   191

void ClientStartError(char *error) {

   192

	DEBUG(net, 0)("[NET] Client could not start network: %s",error);

   193

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   194

}

   195

   196

void ServerStartError(char *error) {

   197

	DEBUG(net, 0)("[NET] Server could not start network: %s",error);

   198

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   199

}

   200

   201

static void NetworkClientError(byte res, NetworkClientState *cs) {

   202

	// First, send a CLIENT_ERROR to the server, so he knows we are

   203

	//  disconnection (and why!)

   204

	NetworkErrorCode errorno;

   205

   206

	// We just want to close the connection..

   207

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   208

		cs->quited = true;

   209

		NetworkCloseClient(cs);

   210

		_networking = false;

   211

   212

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   213

		return;

   214

	}

   215

   216

	switch(res) {

   217

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   218

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   219

		default: errorno = NETWORK_ERROR_GENERAL;

   220

	}

   221

	// This means we fucked up and the server closed the connection

   222

	if (res != NETWORK_RECV_STATUS_SERVER_ERROR && res != NETWORK_RECV_STATUS_SERVER_FULL &&

   223

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   224

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   225

   226

		// Dequeue all commands before closing the socket

   227

		NetworkSend_Packets(DEREF_CLIENT(0));

   228

	}

   229

   230

	_switch_mode = SM_MENU;

   231

	NetworkCloseClient(cs);

   232

	_networking = false;

   233

}

   234

   235

// Find all IP-aliases for this host

   236

static void NetworkFindIPs(void)

   237

{

   238

	int i, last;

   239

   240

#if defined(BEOS_NET_SERVER) /* doesn't have neither getifaddrs or net/if.h */

   241

	/* Based on Andrew Bachmann's netstat+.c. Big thanks to him! */

   242

	int _netstat(int fd, char **output, int verbose);

   243

   244

	int seek_past_header(char **pos, const char *header) {

   245

		char *new_pos = strstr(*pos, header);

   246

		if (new_pos == 0) {

   247

			return B_ERROR;

   248

		}

   249

		*pos += strlen(header) + new_pos - *pos + 1;

   250

		return B_OK;

   251

	}

   252

   253

	int output_length;

   254

	char *output_pointer = NULL;

   255

	char **output;

   256

	int sock = socket(AF_INET, SOCK_DGRAM, 0);

   257

	i = 0;

   258

   259

	// If something fails, make sure the list is empty

   260

	_network_ip_list[0] = 0;

   261

   262

	if (sock < 0) {

   263

		DEBUG(net, 0)("Error creating socket!");

   264

		return;

   265

	}

   266

   267

	output_length = _netstat(sock, &output_pointer, 1);

   268

	if (output_length < 0) {

   269

		DEBUG(net, 0)("Error running _netstat!");

   270

		return;

   271

	}

   272

   273

	output = &output_pointer;

   274

	if (seek_past_header(output, "IP Interfaces:") == B_OK) {

   275

		for (;;) {

   276

			uint32 n, fields, read;

   277

			uint8 i1, i2, i3, i4, j1, j2, j3, j4;

   278

			struct in_addr inaddr;

   279

			fields = sscanf(*output, "%u: %hhu.%hhu.%hhu.%hhu, netmask %hhu.%hhu.%hhu.%hhu%n",

   280

												&n, &i1,&i2,&i3,&i4, &j1,&j2,&j3,&j4, &read);

   281

			read += 1;

   282

			if (fields != 9) {

   283

				break;

   284

			}

   285

			inaddr.s_addr = htonl((uint32)i1 << 24 | (uint32)i2 << 16 | (uint32)i3 << 8 | (uint32)i4);

   286

			if (inaddr.s_addr != 0) {

   287

				_network_ip_list[i] = inaddr.s_addr;

   288

				i++;

   289

			}

   290

			if (read < 0) {

   291

				break;

   292

			}

   293

			*output += read;

   294

		}

   295

		/* XXX - Using either one of these crashes openttd heavily? - wber */

   296

		/*free(output_pointer);*/

   297

		/*free(output);*/

   298

		closesocket(sock);

   299

	}

   300

#elif defined(HAVE_GETIFADDRS)

   301

	struct ifaddrs *ifap, *ifa;

   302

   303

	// If something fails, make sure the list is empty

   304

	_network_ip_list[0] = 0;

   305

   306

	if (getifaddrs(&ifap) != 0)

   307

		return;

   308

   309

	i = 0;

   310

	for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {

   311

		if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET)

   312

			continue;

   313

		_network_ip_list[i] = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;

   314

		i++;

   315

	}

   316

	freeifaddrs(ifap);

   317

   318

#else /* not HAVE_GETIFADDRS */

   319

   320

	unsigned long len = 0;

   321

	SOCKET sock;

   322

	IFREQ ifo[MAX_INTERFACES];

   323

   324

#ifndef WIN32

   325

	struct ifconf if_conf;

   326

#endif

   327

   328

	// If something fails, make sure the list is empty

   329

	_network_ip_list[0] = 0;

   330

   331

	if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {

   332

		return;

   333

	}

   334

   335

#ifdef WIN32

   336

	// On windows it is easy

   337

	memset(&ifo[0], 0, sizeof(ifo));

   338

	if ((WSAIoctl(sock, SIO_GET_INTERFACE_LIST, NULL, 0, &ifo[0], sizeof(ifo), &len, NULL, NULL)) != 0) {

   339

		closesocket(sock);

   340

		return;

   341

	}

   342

#else

   343

	// On linux a bit harder

   344

	if_conf.ifc_len = (sizeof (struct ifreq)) * MAX_INTERFACES;

   345

	if_conf.ifc_buf = (char *)&ifo[0];

   346

	if ((ioctl(sock, SIOCGIFCONF, &if_conf)) == -1) {

   347

		closesocket(sock);

   348

		return;

   349

	}

   350

	len = if_conf.ifc_len;

   351

#endif /* WIN32 */

   352

   353

	// Now walk through all IPs and list them

   354

	for (i = 0; i < (int)(len / sizeof(IFREQ)); i++) {

   355

		// Request IP for this interface

   356

#ifdef WIN32

   357

		_network_ip_list[i] = *(&ifo[i].iiAddress.AddressIn.sin_addr.s_addr);

   358

#else

   359

		if ((ioctl(sock, SIOCGIFADDR, &ifo[i])) != 0) {

   360

			closesocket(sock);

   361

			return;

   362

		}

   363

   364

		_network_ip_list[i] = ((struct sockaddr_in *)&ifo[i].ifr_addr)->sin_addr.s_addr;

   365

#endif

   366

	}

   367

   368

	closesocket(sock);

   369

   370

#endif /* not HAVE_GETIFADDRS */

   371

   372

	_network_ip_list[i] = 0;

   373

	last = i - 1;

   374

   375

	DEBUG(net, 3)("Detected IPs:");

   376

	// Now display to the debug all the detected ips

   377

	i = 0;

   378

	while (_network_ip_list[i] != 0) {

   379

		// Also check for non-used ips (127.0.0.1)

   380

		if (_network_ip_list[i] == inet_addr("127.0.0.1")) {

   381

			// If there is an ip after thisone, put him in here

   382

			if (last > i)

   383

				_network_ip_list[i] = _network_ip_list[last];

   384

			// Clear the last ip

   385

			_network_ip_list[last] = 0;

   386

			// And we have 1 ip less

   387

			last--;

   388

			continue;

   389

		}

   390

   391

		DEBUG(net, 3)(" %d) %s", i, inet_ntoa(*(struct in_addr *)&_network_ip_list[i]));//inet_ntoa(inaddr));

   392

		i++;

   393

	}

   394

}

   395

   396

// Resolve a hostname to a inet_addr

   397

unsigned long NetworkResolveHost(const char *hostname)

   398

{

   399

	in_addr_t ip;

   400

   401

	// First try: is it an ip address?

   402

	ip = inet_addr(hostname);

   403

   404

	// If not try to resolve the name

   405

	if (ip == INADDR_NONE) {

   406

		struct hostent *he = gethostbyname(hostname);

   407

		if (he == NULL) {

   408

			DEBUG(net, 0) ("[NET] Cannot resolve %s", hostname);

   409

		} else {

   410

			struct in_addr addr = *(struct in_addr *)he->h_addr_list[0];

   411

			DEBUG(net, 1) ("[NET] Resolved %s to %s", hostname, inet_ntoa(addr));

   412

			ip = addr.s_addr;

   413

		}

   414

	}

   415

	return ip;

   416

}

   417

   418

// Converts a string to ip/port/player

   419

//  Format: IP#player:port

   420

//

   421

// connection_string will be re-terminated to seperate out the hostname, and player and port will

   422

// be set to the player and port strings given by the user, inside the memory area originally

   423

// occupied by connection_string.

   424

void ParseConnectionString(const byte **player, const byte **port, byte *connection_string)

   425

{

   426

	byte *p;

   427

	for (p = connection_string; *p != '\0'; p++) {

   428

		if (*p == '#') {

   429

			*player = p + 1;

   430

			*p = '\0';

   431

		} else if (*p == ':') {

   432

			*port = p + 1;

   433

			*p = '\0';

   434

		}

   435

	}

   436

}

   437

   438

// Creates a new client from a socket

   439

//   Used both by the server and the client

   440

static NetworkClientState *NetworkAllocClient(SOCKET s)

   441

{

   442

	NetworkClientState *cs;

   443

	NetworkClientInfo *ci;

   444

	byte client_no;

   445

   446

	client_no = 0;

   447

   448

	if (_network_server) {

   449

		// Can we handle a new client?

   450

		if (_network_clients_connected >= MAX_CLIENTS)

   451

			return NULL;

   452

   453

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   454

			return NULL;

   455

   456

		// Register the login

   457

		client_no = _network_clients_connected++;

   458

	}

   459

   460

	cs = &_clients[client_no];

   461

	memset(cs, 0, sizeof(*cs));

   462

	cs->socket = s;

   463

	cs->last_frame = 0;

   464

	cs->quited = false;

   465

   466

	if (_network_server) {

   467

		ci = DEREF_CLIENT_INFO(cs);

   468

		memset(ci, 0, sizeof(*ci));

   469

   470

		cs->index = _network_client_index++;

   471

		ci->client_index = cs->index;

   472

		ci->join_date = _date;

   473

   474

		InvalidateWindow(WC_CLIENT_LIST, 0);

   475

	}

   476

   477

	return cs;

   478

}

   479

   480

// Close a connection

   481

void NetworkCloseClient(NetworkClientState *cs)

   482

{

   483

	NetworkClientInfo *ci;

   484

	// Socket is already dead

   485

	if (cs->socket == INVALID_SOCKET) {

   486

		cs->quited = true;

   487

		return;

   488

	}

   489

   490

	DEBUG(net, 1) ("[NET] Closed client connection");

   491

   492