1

/* $Id$ */

     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) return ci;

    59

	}

    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

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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) return cs;

    86

	}

    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

    97

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

    98

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

    99

	} else {

   100

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

   101

	}

   102

}

   103

   104

byte NetworkSpectatorCount(void)

   105

{

   106

	const NetworkClientState *cs;

   107

	byte count = 0;

   108

   109

	FOR_ALL_CLIENTS(cs) {

   110

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

   111

	}

   112

   113

	return count;

   114

}

   115

   116

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

   117

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

   118

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

   119

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

   120

{

   121

	char buf[1024];

   122

	va_list va;

   123

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

   124

	char message[1024];

   125

	char temp[1024];

   126

   127

	va_start(va, str);

   128

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

   129

	va_end(va);

   130

   131

	switch (action) {

   132

		case NETWORK_ACTION_JOIN:

   133

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   134

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

   135

			break;

   136

		case NETWORK_ACTION_LEAVE:

   137

			GetString(temp, STR_NETWORK_ERR_LEFT);

   138

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

   139

			break;

   140

		case NETWORK_ACTION_GIVE_MONEY:

   141

			if (self_send) {

   142

				SetDParamStr(0, name);

   143

				SetDParam(1, atoi(buf));

   144

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   145

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

   146

			} else {

   147

				SetDParam(0, atoi(buf));

   148

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   149

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

   150

			}

   151

			break;

   152

		case NETWORK_ACTION_CHAT_PLAYER:

   153

			if (self_send) {

   154

				SetDParamStr(0, name);

   155

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   156

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

   157

			} else {

   158

				SetDParamStr(0, name);

   159

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   160

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

   161

			}

   162

			break;

   163

		case NETWORK_ACTION_CHAT_CLIENT:

   164

			if (self_send) {

   165

				SetDParamStr(0, name);

   166

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   167

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

   168

			} else {

   169

				SetDParamStr(0, name);

   170

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   171

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

   172

			}

   173

			break;

   174

		case NETWORK_ACTION_NAME_CHANGE:

   175

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   176

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

   177

			break;

   178

		default:

   179

			SetDParamStr(0, name);

   180

			GetString(temp, STR_NETWORK_CHAT_ALL);

   181

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

   182

			break;

   183

	}

   184

   185

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

   186

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

   187

}

   188

   189

// Calculate the frame-lag of a client

   190

uint NetworkCalculateLag(const NetworkClientState *cs)

   191

{

   192

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

   193

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

   194

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

   195

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

   196

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

   197

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

   198

   199

	return lag;

   200

}

   201

   202

   203

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

   204

//  error

   205

static void NetworkError(StringID error_string)

   206

{

   207

	_switch_mode = SM_MENU;

   208

	_switch_mode_errorstr = error_string;

   209

}

   210

   211

static void ClientStartError(const char *error)

   212

{

   213

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

   214

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   215

}

   216

   217

static void ServerStartError(const char *error)

   218

{

   219

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

   220

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   221

}

   222

   223

static void NetworkClientError(byte res, NetworkClientState* cs)

   224

{

   225

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

   226

	//  disconnection (and why!)

   227

	NetworkErrorCode errorno;

   228

   229

	// We just want to close the connection..

   230

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   231

		cs->quited = true;

   232

		NetworkCloseClient(cs);

   233

		_networking = false;

   234

   235

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   236

		return;

   237

	}

   238

   239

	switch (res) {

   240

		case NETWORK_RECV_STATUS_DESYNC:   errorno = NETWORK_ERROR_DESYNC; break;

   241

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   242

		default:                           errorno = NETWORK_ERROR_GENERAL; break;

   243

	}

   244

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

   245

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

   246

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   247

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   248

   249

		// Dequeue all commands before closing the socket

   250

		NetworkSend_Packets(DEREF_CLIENT(0));

   251

	}

   252

   253

	_switch_mode = SM_MENU;

   254

	NetworkCloseClient(cs);

   255

	_networking = false;

   256

}

   257

   258

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

   259

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

   260

 * @param err NetworkErrorCode

   261

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

   262

char *GetNetworkErrorMsg(char *buf, NetworkErrorCode err)

   263

{

   264

	/* List of possible network errors, used by

   265

	 * PACKET_SERVER_ERROR and PACKET_CLIENT_ERROR */

   266

	static const StringID network_error_strings[] = {

   267

		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,

   274

		STR_NETWORK_ERR_CLIENT_WRONG_REVISION,

   275

		STR_NETWORK_ERR_CLIENT_NAME_IN_USE,

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		STR_NETWORK_ERR_CLIENT_WRONG_PASSWORD,

   277

		STR_NETWORK_ERR_CLIENT_PLAYER_MISMATCH,

   278

		STR_NETWORK_ERR_CLIENT_KICKED,

   279

		STR_NETWORK_ERR_CLIENT_CHEATER,

   280

		STR_NETWORK_ERR_CLIENT_SERVER_FULL

   281

	};

   282

   283

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

   284

   285

	return GetString(buf, network_error_strings[err]);

   286

}

   287

   288

// Find all IP-aliases for this host

   289

static void NetworkFindIPs(void)

   290

{

   291

	int i;

   292

   293

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

   294

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

   295

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

   296

   297

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

   298

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

   299

		if (new_pos == 0) {

   300

			return B_ERROR;

   301

		}

   302

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

   303

		return B_OK;

   304

	}

   305

   306

	int output_length;

   307

	char *output_pointer = NULL;

   308

	char **output;

   309

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

   310

	i = 0;

   311

   312

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

   313

	_broadcast_list[0] = 0;

   314

   315

	if (sock < 0) {

   316

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

   317

		return;

   318

	}

   319

   320

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

   321

	if (output_length < 0) {

   322

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

   323

		return;

   324

	}

   325

   326

	output = &output_pointer;

   327

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

   328

		for (;;) {

   329

			uint32 n, fields, read;

   330

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

   331

			struct in_addr inaddr;

   332

			uint32 ip;

   333

			uint32 netmask;

   334

   335

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

   336

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

   337

			read += 1;

   338

			if (fields != 9) {

   339

				break;

   340

			}

   341

   342

			ip      = (uint32)i1 << 24 | (uint32)i2 << 16 | (uint32)i3 << 8 | (uint32)i4;

   343

			netmask = (uint32)j1 << 24 | (uint32)j2 << 16 | (uint32)j3 << 8 | (uint32)j4;

   344

   345

			if (ip != INADDR_LOOPBACK && ip != INADDR_ANY) {

   346

				inaddr.s_addr = htonl(ip | ~netmask);

   347

				_broadcast_list[i] = inaddr.s_addr;

   348

				i++;

   349

			}

   350

			if (read < 0) {

   351

				break;

   352

			}

   353

			*output += read;

   354

		}

   355

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

   356

		/*free(output_pointer);*/

   357

		/*free(output);*/

   358

		closesocket(sock);

   359

	}

   360

#elif defined(HAVE_GETIFADDRS)

   361

	struct ifaddrs *ifap, *ifa;

   362

   363

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

   364

	_broadcast_list[0] = 0;

   365

   366

	if (getifaddrs(&ifap) != 0)

   367

		return;

   368

   369

	i = 0;

   370

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

   371

		if (!(ifa->ifa_flags & IFF_BROADCAST)) continue;

   372

		if (ifa->ifa_broadaddr == NULL) continue;

   373

		if (ifa->ifa_broadaddr->sa_family != AF_INET) continue;

   374

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

   375

		i++;

   376

	}

   377

	freeifaddrs(ifap);

   378

   379

#else /* not HAVE_GETIFADDRS */

   380

	SOCKET sock;

   381

#ifdef WIN32

   382

	DWORD len = 0;

   383

	INTERFACE_INFO ifo[MAX_INTERFACES];

   384

	uint j;

   385

#else

   386

	char buf[4 * 1024]; // Arbitrary buffer size

   387

	struct ifconf ifconf;

   388

	const char* buf_end;

   389

	const char* p;

   390

#endif

   391

   392

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

   393

	_broadcast_list[0] = 0;

   394

   395

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   396

	if (sock == INVALID_SOCKET) return;

   397

   398

#ifdef WIN32

   399

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

   400

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

   401

		closesocket(sock);

   402

		return;

   403

	}

   404

   405

	i = 0;

   406

	for (j = 0; j < len / sizeof(*ifo); j++) {

   407

		if (ifo[j].iiFlags & IFF_LOOPBACK) continue;

   408

		if (!(ifo[j].iiFlags & IFF_BROADCAST)) continue;

   409

		/* iiBroadcast is unusable, because it always seems to be set to

   410

		 * 255.255.255.255.

   411

		 */

   412

		_broadcast_list[i++] =

   413

			 ifo[j].iiAddress.AddressIn.sin_addr.s_addr |

   414

			~ifo[j].iiNetmask.AddressIn.sin_addr.s_addr;

   415

	}

   416

#else

   417

	ifconf.ifc_len = sizeof(buf);

   418

	ifconf.ifc_buf = buf;

   419

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

   420

		closesocket(sock);

   421

		return;

   422

	}

   423

   424

	i = 0;

   425

	buf_end = buf + ifconf.ifc_len;

   426

	for (p = buf; p < buf_end;) {

   427

		const struct ifreq* req = (const struct ifreq*)p;

   428

   429

		if (req->ifr_addr.sa_family == AF_INET) {

   430

			struct ifreq r;

   431

   432

			strncpy(r.ifr_name, req->ifr_name, lengthof(r.ifr_name));

   433

			if (ioctl(sock, SIOCGIFFLAGS, &r) != -1 &&

   434

					r.ifr_flags & IFF_BROADCAST &&

   435

					ioctl(sock, SIOCGIFBRDADDR, &r) != -1) {

   436

				_broadcast_list[i++] =

   437

					((struct sockaddr_in*)&r.ifr_broadaddr)->sin_addr.s_addr;

   438

			}

   439

		}

   440

   441

		p += sizeof(struct ifreq);

   442

#ifdef AF_LINK

   443

		p += req->ifr_addr.sa_len - sizeof(struct sockaddr);

   444

#endif

   445

	}

   446

#endif

   447

   448

	closesocket(sock);

   449

#endif /* not HAVE_GETIFADDRS */

   450

   451

	_broadcast_list[i] = 0;

   452

   453

	DEBUG(net, 3)("Detected broadcast addresses:");

   454

	// Now display to the debug all the detected ips

   455

	for (i = 0; _broadcast_list[i] != 0; i++) {

   456

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

   457

	}

   458

}

   459

   460

// Resolve a hostname to a inet_addr

   461

unsigned long NetworkResolveHost(const char *hostname)

   462

{

   463

	in_addr_t ip;

   464

   465

	// First try: is it an ip address?

   466

	ip = inet_addr(hostname);

   467

   468

	// If not try to resolve the name

   469

	if (ip == INADDR_NONE) {

   470

		struct hostent *he = gethostbyname(hostname);

   471

		if (he == NULL) {

   472

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

   473

		} else {

   474

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

   475

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

   476

			ip = addr.s_addr;

   477

		}

   478

	}

   479

	return ip;

   480

}

   481

   482

// Converts a string to ip/port/player

   483

//  Format: IP#player:port

   484

//

   485

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

   486

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

   487

// occupied by connection_string.