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/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "debug.h"

     6

#include "functions.h"

     7

#include "string.h"

     8

#include "strings.h"

     9

#include "map.h"

    10

#include "network_data.h"

    11

#include "command.h"

    12

#include "variables.h"

    13

    14

#if defined(WITH_REV)

    15

	extern const char _openttd_revision[];

    16

#elif defined(WITH_REV_HACK)

    17

	#define WITH_REV

    18

	const char _openttd_revision[] = WITH_REV_HACK;

    19

#else

    20

	const char _openttd_revision[] = NOREV_STRING;

    21

#endif

    22

    23

    24

#ifdef ENABLE_NETWORK

    25

    26

#include "table/strings.h"

    27

#include "network_client.h"

    28

#include "network_server.h"

    29

#include "network_udp.h"

    30

#include "network_gamelist.h"

    31

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

    32

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

    33

#include "md5.h"

    34

    35

#ifdef __MORPHOS__

    36

// the library base is required here

    37

struct Library *SocketBase = NULL;

    38

#endif

    39

    40

// The listen socket for the server

    41

static SOCKET _listensocket;

    42

    43

// The amount of clients connected

    44

static byte _network_clients_connected = 0;

    45

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

    46

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    47

    48

/* Some externs / forwards */

    49

extern void ShowJoinStatusWindow(void);

    50

extern void StateGameLoop(void);

    51

    52

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

    53

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    54

{

    55

	NetworkClientInfo *ci;

    56

    57

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

    58

		if (ci->client_index == client_index)

    59

			return ci;

    60

    61

	return NULL;

    62

}

    63

    64

/** Return the CI for a given IP

    65

 * @param ip IP of the client we are looking for. This must be in string-format

    66

 * @return return a pointer to the corresponding NetworkClientInfo struct or NULL on failure */

    67

NetworkClientInfo *NetworkFindClientInfoFromIP(const char *ip)

    68

{

    69

	NetworkClientInfo *ci;

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	uint32 ip_number = inet_addr(ip);

    71

    72

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

    73

		if (ci->client_ip == ip_number) return ci;

    74

	}

    75

    76

	return NULL;

    77

}

    78

    79

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

    80

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    81

{

    82

	NetworkClientState *cs;

    83

    84

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

    85

		if (cs->index == client_index)

    86

			return cs;

    87

    88

	return NULL;

    89

}

    90

    91

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

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

    93

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

    94

{

    95

	const NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    96

	if (*ci->client_name == '\0')

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		snprintf(client_name, size, "Client #%4d", cs->index);

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	else

    99

		ttd_strlcpy(client_name, ci->client_name, size);

   100

}

   101

   102

byte NetworkSpectatorCount(void)

   103

{

   104

	const NetworkClientState *cs;

   105

	byte count = 0;

   106

   107

	FOR_ALL_CLIENTS(cs) {

   108

		if (DEREF_CLIENT_INFO(cs)->client_playas == OWNER_SPECTATOR) count++;

   109

	}

   110

   111

	return count;

   112

}

   113

   114

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

   115

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

   116

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

   117

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

   118

{

   119

	char buf[1024];

   120

	va_list va;

   121

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

   122

	char message[1024];

   123

	char temp[1024];

   124

   125

	va_start(va, str);

   126

	vsnprintf(buf, lengthof(buf), str, va);

   127

	va_end(va);

   128

   129

	switch (action) {

   130

		case NETWORK_ACTION_JOIN:

   131

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   132

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

   133

			break;

   134

		case NETWORK_ACTION_LEAVE:

   135

			GetString(temp, STR_NETWORK_ERR_LEFT);

   136

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

   137

			break;

   138

		case NETWORK_ACTION_GIVE_MONEY:

   139

			if (self_send) {

   140

				SetDParamStr(0, name);

   141

				SetDParam(1, atoi(buf));

   142

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   143

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

   144

			} else {

   145

				SetDParam(0, atoi(buf));

   146

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   147

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

   148

			}

   149

			break;

   150

		case NETWORK_ACTION_CHAT_PLAYER:

   151

			if (self_send) {

   152

				SetDParamStr(0, name);

   153

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   154

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

   155

			} else {

   156

				SetDParamStr(0, name);

   157

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   158

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

   159

			}

   160

			break;

   161

		case NETWORK_ACTION_CHAT_CLIENT:

   162

			if (self_send) {

   163

				SetDParamStr(0, name);

   164

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   165

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

   166

			} else {

   167

				SetDParamStr(0, name);

   168

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   169

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

   170

			}

   171

			break;

   172

		case NETWORK_ACTION_NAME_CHANGE:

   173

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   174

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

   175

			break;

   176

		default:

   177

			SetDParamStr(0, name);

   178

			GetString(temp, STR_NETWORK_CHAT_ALL);

   179

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

   180

			break;

   181

	}

   182

   183

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

   184

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

   185

}

   186

   187

// Calculate the frame-lag of a client

   188

uint NetworkCalculateLag(const NetworkClientState *cs)

   189

{

   190

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

   191

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

   192

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

   193

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

   194

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

   195

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

   196

   197

	return lag;

   198

}

   199

   200

   201

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

   202

//  error

   203

static void NetworkError(StringID error_string)

   204

{

   205

	_switch_mode = SM_MENU;

   206

	_switch_mode_errorstr = error_string;

   207

}

   208

   209

static void ClientStartError(const char *error)

   210

{

   211

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

   212

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   213

}

   214

   215

static void ServerStartError(const char *error)

   216

{

   217

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

   218

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   219

}

   220

   221

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

   222

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

   223

	//  disconnection (and why!)

   224

	NetworkErrorCode errorno;

   225

   226

	// We just want to close the connection..

   227

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   228

		cs->quited = true;

   229

		NetworkCloseClient(cs);

   230

		_networking = false;

   231

   232

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   233

		return;

   234

	}

   235

   236

	switch (res) {

   237

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   238

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   239

		default: errorno = NETWORK_ERROR_GENERAL;

   240

	}

   241

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

   242

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

   243

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   244

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   245

   246

		// Dequeue all commands before closing the socket

   247

		NetworkSend_Packets(DEREF_CLIENT(0));

   248

	}

   249

   250

	_switch_mode = SM_MENU;

   251

	NetworkCloseClient(cs);

   252

	_networking = false;

   253

}

   254

   255

/** Retrieve a string representation of an internal error number

   256

 * @param buf buffer where the error message will be stored

   257

 * @param err NetworkErrorCode (integer)

   258

 * @return returns a pointer to the error message (buf) */

   259

char *GetNetworkErrorMsg(char *buf, NetworkErrorCode err)

   260

{

   261

	/* List of possible network errors, used by

   262

	 * PACKET_SERVER_ERROR and PACKET_CLIENT_ERROR */

   263

	static const StringID network_error_strings[] = {

   264

		STR_NETWORK_ERR_CLIENT_GENERAL,

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		STR_NETWORK_ERR_CLIENT_DESYNC,

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		STR_NETWORK_ERR_CLIENT_SAVEGAME,

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		STR_NETWORK_ERR_CLIENT_CONNECTION_LOST,

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		STR_NETWORK_ERR_CLIENT_PROTOCOL_ERROR,

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		STR_NETWORK_ERR_CLIENT_NOT_AUTHORIZED,

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		STR_NETWORK_ERR_CLIENT_NOT_EXPECTED,

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		STR_NETWORK_ERR_CLIENT_WRONG_REVISION,

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		STR_NETWORK_ERR_CLIENT_NAME_IN_USE,

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		STR_NETWORK_ERR_CLIENT_WRONG_PASSWORD,

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		STR_NETWORK_ERR_CLIENT_PLAYER_MISMATCH,

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		STR_NETWORK_ERR_CLIENT_KICKED,

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		STR_NETWORK_ERR_CLIENT_CHEATER,

   277

		STR_NETWORK_ERR_CLIENT_SERVER_FULL,

   278

	};

   279

   280

	if (err >= lengthof(network_error_strings)) err = 0;

   281

   282

	return GetString(buf, network_error_strings[err]);

   283

}

   284

   285

// Find all IP-aliases for this host

   286

static void NetworkFindIPs(void)

   287

{

   288

	int i, last;

   289

   290

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

   291

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

   292

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

   293

   294

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

   295

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

   296

		if (new_pos == 0) {

   297

			return B_ERROR;

   298

		}

   299

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

   300

		return B_OK;

   301

	}

   302

   303

	int output_length;

   304

	char *output_pointer = NULL;

   305

	char **output;

   306

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

   307

	i = 0;

   308

   309

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

   310

	_network_ip_list[0] = 0;

   311

   312

	if (sock < 0) {

   313

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

   314

		return;

   315

	}

   316

   317

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

   318

	if (output_length < 0) {

   319

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

   320

		return;

   321

	}

   322

   323

	output = &output_pointer;

   324

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

   325

		for (;;) {

   326

			uint32 n, fields, read;

   327

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

   328

			struct in_addr inaddr;

   329

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

   330

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

   331

			read += 1;

   332

			if (fields != 9) {

   333

				break;

   334

			}

   335

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

   336

			if (inaddr.s_addr != 0) {

   337

				_network_ip_list[i] = inaddr.s_addr;

   338

				i++;

   339

			}

   340

			if (read < 0) {

   341

				break;

   342

			}

   343

			*output += read;

   344

		}

   345

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

   346

		/*free(output_pointer);*/

   347

		/*free(output);*/

   348

		closesocket(sock);

   349

	}

   350

#elif defined(HAVE_GETIFADDRS)

   351

	struct ifaddrs *ifap, *ifa;

   352

   353

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

   354

	_network_ip_list[0] = 0;

   355

   356

	if (getifaddrs(&ifap) != 0)

   357

		return;

   358

   359

	i = 0;

   360

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

   361

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

   362

			continue;

   363

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

   364

		i++;

   365

	}

   366

	freeifaddrs(ifap);

   367

   368

#else /* not HAVE_GETIFADDRS */

   369

   370

	unsigned long len = 0;

   371

	SOCKET sock;

   372

	IFREQ ifo[MAX_INTERFACES];

   373

   374

#ifndef WIN32

   375

	struct ifconf if_conf;

   376

#endif

   377

   378

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

   379

	_network_ip_list[0] = 0;

   380

   381

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   382

	if (sock == INVALID_SOCKET) return;

   383

   384

#ifdef WIN32

   385

	// On windows it is easy

   386

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

   387

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

   388

		closesocket(sock);

   389

		return;

   390

	}

   391

#else

   392

	// On linux a bit harder

   393

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

   394

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

   395

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

   396

		closesocket(sock);

   397

		return;

   398

	}

   399

	len = if_conf.ifc_len;

   400

#endif /* WIN32 */

   401

   402

	// Now walk through all IPs and list them

   403

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

   404

		// Request IP for this interface

   405

#ifdef WIN32

   406

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

   407

#else

   408

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

   409

			closesocket(sock);

   410

			return;

   411

		}

   412

   413

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

   414

#endif

   415

	}

   416

   417

	closesocket(sock);

   418

   419

#endif /* not HAVE_GETIFADDRS */

   420

   421

	_network_ip_list[i] = 0;

   422

	last = i - 1;

   423

   424

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

   425

	// Now display to the debug all the detected ips

   426

	i = 0;

   427

	while (_network_ip_list[i] != 0) {

   428

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

   429

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

   430

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

   431

			if (last > i)

   432

				_network_ip_list[i] = _network_ip_list[last];

   433

			// Clear the last ip

   434

			_network_ip_list[last] = 0;

   435

			// And we have 1 ip less

   436

			last--;

   437

			continue;

   438

		}

   439

   440

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

   441

		i++;

   442

	}

   443

}

   444

   445

// Resolve a hostname to a inet_addr

   446

unsigned long NetworkResolveHost(const char *hostname)

   447

{

   448

	in_addr_t ip;

   449

   450

	// First try: is it an ip address?

   451

	ip = inet_addr(hostname);

   452

   453

	// If not try to resolve the name

   454

	if (ip == INADDR_NONE) {

   455

		struct hostent *he = gethostbyname(hostname);

   456

		if (he == NULL) {

   457

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

   458

		} else {

   459

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

   460

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

   461

			ip = addr.s_addr;

   462

		}

   463

	}

   464

	return ip;

   465

}

   466

   467

// Converts a string to ip/port/player

   468

//  Format: IP#player:port

   469

//

   470

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

   471

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

   472

// occupied by connection_string.

   473

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

   474

{

   475

	char *p;

   476

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

   477

		if (*p == '#') {

   478

			*player = p + 1;

   479

			*p = '\0';

   480

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

   481

			*port = p + 1;

   482

			*p = '\0';

   483

		}

   484

	}

   485

}

   486

   487

// Creates a new client from a socket

   488

//   Used both by the server and the client

   489

static NetworkClientState *NetworkAllocClient(SOCKET s)

   490

{