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

// The listen socket for the server

    27

static SOCKET _listensocket;

    28

    29

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

    30

//  after he joined a server

    31

static Patches network_tmp_patches;

    32

    33

// The amount of clients connected

    34

static byte _network_clients_connected = 0;

    35

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

    36

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    37

    38

/* Some externs / forwards */

    39

extern void ShowJoinStatusWindow();

    40

extern void StateGameLoop();

    41

extern uint GetCurrentCurrencyRate();

    42

    43

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

    44

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    45

{

    46

	NetworkClientInfo *ci;

    47

    48

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

    49

		if (ci->client_index == client_index)

    50

			return ci;

    51

    52

	return NULL;

    53

}

    54

    55

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

    56

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    57

{

    58

	NetworkClientState *cs;

    59

    60

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

    61

		if (cs->index == client_index)

    62

			return cs;

    63

    64

	return NULL;

    65

}

    66

    67

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

    68

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

    69

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

    70

{

    71

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    72

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

    73

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

    74

	else

    75

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

    76

}

    77

    78

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

    79

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

    80

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

    81

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

    82

{

    83

	char buf[1024];

    84

	va_list va;

    85

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

    86

	char message[1024];

    87

	char temp[1024];

    88

	StringID TempStr = STR_NULL;

    89

    90

	va_start(va, str);

    91

	vsprintf(buf, str, va);

    92

	va_end(va);

    93

    94

	switch (action) {

    95

		case NETWORK_ACTION_JOIN:

    96

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

    97

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

    98

			break;

    99

		case NETWORK_ACTION_LEAVE:

   100

			GetString(temp, STR_NETWORK_ERR_LEFT);

   101

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

   102

			break;

   103

		case NETWORK_ACTION_GIVE_MONEY:

   104

			if (self_send) {

   105

				TempStr = AllocateName(name, 0);

   106

				SetDParam(0, TempStr);

   107

				SetDParam(1, atoi(buf));

   108

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   109

				DeleteName(TempStr);

   110

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

   111

			} else {

   112

				SetDParam(0, atoi(buf));

   113

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   114

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

   115

			}

   116

			break;

   117

		case NETWORK_ACTION_CHAT_PLAYER:

   118

			if (self_send) {

   119

				TempStr = AllocateName(name, 0);

   120

				SetDParam(0, TempStr);

   121

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   122

				DeleteName(TempStr);

   123

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

   124

			} else {

   125

				TempStr = AllocateName(name, 0);

   126

				SetDParam(0, TempStr);

   127

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   128

				DeleteName(TempStr);

   129

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

   130

			}

   131

			break;

   132

		case NETWORK_ACTION_CHAT_CLIENT:

   133

			if (self_send) {

   134

				TempStr = AllocateName(name, 0);

   135

				SetDParam(0, TempStr);

   136

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   137

				DeleteName(TempStr);

   138

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

   139

			} else {

   140

				TempStr = AllocateName(name, 0);

   141

				SetDParam(0, TempStr);

   142

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   143

				DeleteName(TempStr);

   144

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

   145

			}

   146

			break;

   147

		case NETWORK_ACTION_NAME_CHANGE:

   148

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   149

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

   150

			break;

   151

		default:

   152

			TempStr = AllocateName(name, 0);

   153

			SetDParam(0, TempStr);

   154

			GetString(temp, STR_NETWORK_CHAT_ALL);

   155

			DeleteName(TempStr);

   156

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

   157

			break;

   158

	}

   159

   160

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

   161

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

   162

}

   163

   164

// Calculate the frame-lag of a client

   165

uint NetworkCalculateLag(const NetworkClientState *cs)

   166

{

   167

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

   168

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

   169

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

   170

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

   171

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

   172

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

   173

   174

	return lag;

   175

}

   176

   177

   178

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

   179

//  error

   180

void NetworkError(StringID error_string)

   181

{

   182

	_switch_mode = SM_MENU;

   183

	_switch_mode_errorstr = error_string;

   184

}

   185

   186

void ClientStartError(char *error) {

   187

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

   188

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   189

}

   190

   191

void ServerStartError(char *error) {

   192

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

   193

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   194

}

   195

   196

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

   197

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

   198

	//  disconnection (and why!)

   199

	NetworkErrorCode errorno;

   200

   201

	// We just want to close the connection..

   202

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   203

		cs->quited = true;

   204

		NetworkCloseClient(cs);

   205

		_networking = false;

   206

   207

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   208

		return;

   209

	}

   210

   211

	switch(res) {

   212

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   213

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   214

		default: errorno = NETWORK_ERROR_GENERAL;

   215

	}

   216

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

   217

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

   218

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   219

   220

		// Dequeue all commands before closing the socket

   221

		NetworkSend_Packets(DEREF_CLIENT(0));

   222

	}

   223

   224

	_switch_mode = SM_MENU;

   225

	NetworkCloseClient(cs);

   226

	_networking = false;

   227

}

   228

   229

// Find all IP-aliases for this host

   230

static void NetworkFindIPs(void)

   231

{

   232

	int i, last;

   233

   234

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

   235

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

   236

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

   237

   238

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

   239

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

   240

		if (new_pos == 0) {

   241

			return B_ERROR;

   242

		}

   243

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

   244

		return B_OK;

   245

	}

   246

   247

	int output_length;

   248

	char *output_pointer = NULL;

   249

	char **output;

   250

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

   251

	i = 0;

   252

   253

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

   254

	_network_ip_list[0] = 0;

   255

   256

	if (sock < 0) {

   257

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

   258

		return;

   259

	}

   260

   261

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

   262

	if (output_length < 0) {

   263

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

   264

		return;

   265

	}

   266

   267

	output = &output_pointer;

   268

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

   269

		for (;;) {

   270

			uint32 n, fields, read;

   271

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

   272

			struct in_addr inaddr;

   273

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

   274

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

   275

			read += 1;

   276

			if (fields != 9) {

   277

				break;

   278

			}

   279

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

   280

			if (inaddr.s_addr != 0) {

   281

				_network_ip_list[i] = inaddr.s_addr;

   282

				i++;

   283

			}

   284

			if (read < 0) {

   285

				break;

   286

			}

   287

			*output += read;

   288

		}

   289

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

   290

		/*free(output_pointer);*/

   291

		/*free(output);*/

   292

		closesocket(sock);

   293

	}

   294

#elif defined(HAVE_GETIFADDRS)

   295

	struct ifaddrs *ifap, *ifa;

   296

   297

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

   298

	_network_ip_list[0] = 0;

   299

   300

	if (getifaddrs(&ifap) != 0)

   301

		return;

   302

   303

	i = 0;

   304

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

   305

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

   306

			continue;

   307

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

   308

		i++;

   309

	}

   310

	freeifaddrs(ifap);

   311

   312

#else /* not HAVE_GETIFADDRS */

   313

   314

	unsigned long len = 0;

   315

	SOCKET sock;

   316

	IFREQ ifo[MAX_INTERFACES];

   317

   318

#ifndef WIN32

   319

	struct ifconf if_conf;

   320

#endif

   321

   322

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

   323

	_network_ip_list[0] = 0;

   324

   325

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

   326

		return;

   327

	}

   328

   329

#ifdef WIN32

   330

	// On windows it is easy

   331

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

   332

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

   333

		closesocket(sock);

   334

		return;

   335

	}

   336

#else

   337

	// On linux a bit harder

   338

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

   339

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

   340

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

   341

		closesocket(sock);

   342

		return;

   343

	}

   344

	len = if_conf.ifc_len;

   345

#endif /* WIN32 */

   346

   347

	// Now walk through all IPs and list them

   348

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

   349

		// Request IP for this interface

   350

#ifdef WIN32

   351

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

   352

#else

   353

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

   354

			closesocket(sock);

   355

			return;

   356

		}

   357

   358

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

   359

#endif

   360

	}

   361

   362

	closesocket(sock);

   363

   364

#endif /* not HAVE_GETIFADDRS */

   365

   366

	_network_ip_list[i] = 0;

   367

	last = i - 1;

   368

   369

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

   370

	// Now display to the debug all the detected ips

   371

	i = 0;

   372

	while (_network_ip_list[i] != 0) {

   373

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

   374

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

   375

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

   376

			if (last > i)

   377

				_network_ip_list[i] = _network_ip_list[last];

   378

			// Clear the last ip

   379

			_network_ip_list[last] = 0;

   380

			// And we have 1 ip less

   381

			last--;

   382

			continue;

   383

		}

   384

   385

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

   386

		i++;

   387

	}

   388

}

   389

   390

// Resolve a hostname to a inet_addr

   391

unsigned long NetworkResolveHost(const char *hostname)

   392

{

   393

	in_addr_t ip;

   394

   395

	// First try: is it an ip address?

   396

	ip = inet_addr(hostname);

   397

   398

	// If not try to resolve the name

   399

	if (ip == INADDR_NONE) {

   400

		struct hostent *he = gethostbyname(hostname);

   401

		if (he == NULL) {

   402

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

   403

		} else {

   404

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

   405

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

   406

			ip = addr.s_addr;

   407

		}

   408

	}

   409

	return ip;

   410

}

   411

   412

// Converts a string to ip/port/player

   413

//  Format: IP#player:port

   414

//

   415

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

   416

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

   417

// occupied by connection_string.

   418

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

   419

{

   420

	byte *p;

   421

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

   422

		if (*p == '#') {

   423

			*player = p + 1;

   424

			*p = '\0';

   425

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

   426

			*port = p + 1;

   427

			*p = '\0';

   428

		}

   429

	}

   430

}

   431

   432

// Creates a new client from a socket

   433

//   Used both by the server and the client

   434

static NetworkClientState *NetworkAllocClient(SOCKET s)

   435

{

   436

	NetworkClientState *cs;

   437

	NetworkClientInfo *ci;

   438

	byte client_no;

   439

   440

	client_no = 0;

   441

   442

	if (_network_server) {

   443

		// Can we handle a new client?

   444

		if (_network_clients_connected >= MAX_CLIENTS)

   445

			return NULL;

   446

   447

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   448

			return NULL;

   449

   450

		// Register the login

   451

		client_no = _network_clients_connected++;

   452

	}

   453

   454

	cs = &_clients[client_no];

   455

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

   456

	cs->socket = s;

   457

	cs->last_frame = 0;

   458

	cs->quited = false;

   459

   460

	if (_network_server) {

   461

		ci = DEREF_CLIENT_INFO(cs);

   462

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

   463

   464

		cs->index = _network_client_index++;

   465

		ci->client_index = cs->index;

   466

		ci->join_date = _date;

   467

   468

		InvalidateWindow(WC_CLIENT_LIST, 0);

   469

	}

   470

   471

	return cs;

   472

}

   473

   474

// Close a connection

   475

void NetworkCloseClient(NetworkClientState *cs)

   476

{

   477

	NetworkClientInfo *ci;

   478

	// Socket is already dead

   479

	if (cs->socket == INVALID_SOCKET) return;

   480

   481

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

   482

   483

	if (!cs->quited && _network_server && cs->status > STATUS_INACTIVE) {

   484

		// We did not receive a leave message from this client...

   485

		NetworkErrorCode errorno = NETWORK_ERROR_CONNECTION_LOST;

   486

		char str[100];

   487

		char client_name[NETWORK_NAME_LENGTH];

   488

		NetworkClientState *new_cs;

   489

   490

		NetworkGetClientName(client_name, sizeof(client_name), cs);

   491

   492