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

#include "date.h"

    14

    15

#if defined(WITH_REV)

    16

	extern const char _openttd_revision[];

    17

#elif defined(WITH_REV_HACK)

    18

	#define WITH_REV

    19

	const char _openttd_revision[] = WITH_REV_HACK;

    20

#else

    21

	const char _openttd_revision[] = NOREV_STRING;

    22

#endif

    23

    24

    25

#ifdef ENABLE_NETWORK

    26

    27

#include "table/strings.h"

    28

#include "network_client.h"

    29

#include "network_server.h"

    30

#include "network_udp.h"

    31

#include "network_gamelist.h"

    32

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

    33

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

    34

#include "md5.h"

    35

    36

#ifdef __MORPHOS__

    37

// the library base is required here

    38

struct Library *SocketBase = NULL;

    39

#endif

    40

    41

// The listen socket for the server

    42

static SOCKET _listensocket;

    43

    44

// The amount of clients connected

    45

static byte _network_clients_connected = 0;

    46

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

    47

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    48

    49

/* Some externs / forwards */

    50

extern void ShowJoinStatusWindow(void);

    51

extern void StateGameLoop(void);

    52

    53

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

    54

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    55

{

    56

	NetworkClientInfo *ci;

    57

    58

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

    59

		if (ci->client_index == client_index) return ci;

    60

	}

    61

    62

	return NULL;

    63

}

    64

    65

/** Return the CI for a given IP

    66

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

    67

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

    68

NetworkClientInfo *NetworkFindClientInfoFromIP(const char *ip)

    69

{

    70

	NetworkClientInfo *ci;

    71

	uint32 ip_number = inet_addr(ip);

    72

    73

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

    74

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

    75

	}

    76

    77

	return NULL;

    78

}

    79

    80

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

    81

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    82

{

    83

	NetworkClientState *cs;

    84

    85

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

    86

		if (cs->index == client_index) return cs;

    87

	}

    88

    89

	return NULL;

    90

}

    91

    92

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

    93

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

    94

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

    95

{

    96

	const NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    97

    98

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

    99

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

   100

	} else {

   101

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

   102

	}

   103

}

   104

   105

byte NetworkSpectatorCount(void)

   106

{

   107

	const NetworkClientState *cs;

   108

	byte count = 0;

   109

   110

	FOR_ALL_CLIENTS(cs) {

   111

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

   112

	}

   113

   114

	return count;

   115

}

   116

   117

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

   118

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

   119

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

   120

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

   121

{

   122

	char buf[1024];

   123

	va_list va;

   124

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

   125

	char message[1024];

   126

	char temp[1024];

   127

   128

	va_start(va, str);

   129

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

   130

	va_end(va);

   131

   132

	switch (action) {

   133

		case NETWORK_ACTION_JOIN:

   134

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   135

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

   136

			break;

   137

		case NETWORK_ACTION_LEAVE:

   138

			GetString(temp, STR_NETWORK_ERR_LEFT);

   139

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

   140

			break;

   141

		case NETWORK_ACTION_GIVE_MONEY:

   142

			if (self_send) {

   143

				SetDParamStr(0, name);

   144

				SetDParam(1, atoi(buf));

   145

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   146

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

   147

			} else {

   148

				SetDParam(0, atoi(buf));

   149

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   150

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

   151

			}

   152

			break;

   153

		case NETWORK_ACTION_CHAT_PLAYER:

   154

			if (self_send) {

   155

				SetDParamStr(0, name);

   156

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   157

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

   158

			} else {

   159

				SetDParamStr(0, name);

   160

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   161

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

   162

			}

   163

			break;

   164

		case NETWORK_ACTION_CHAT_CLIENT:

   165

			if (self_send) {

   166

				SetDParamStr(0, name);

   167

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   168

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

   169

			} else {

   170

				SetDParamStr(0, name);

   171

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   172

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

   173

			}

   174

			break;

   175

		case NETWORK_ACTION_NAME_CHANGE:

   176

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   177

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

   178

			break;

   179

		default:

   180

			SetDParamStr(0, name);

   181

			GetString(temp, STR_NETWORK_CHAT_ALL);

   182

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

   183

			break;

   184

	}

   185

   186

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

   187

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

   188

}

   189

   190

// Calculate the frame-lag of a client

   191

uint NetworkCalculateLag(const NetworkClientState *cs)

   192

{

   193

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

   194

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

   195

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

   196

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

   197

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

   198

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

   199

   200

	return lag;

   201

}

   202

   203

   204

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

   205

//  error

   206

static void NetworkError(StringID error_string)

   207

{

   208

	_switch_mode = SM_MENU;

   209

	_switch_mode_errorstr = error_string;

   210

}

   211

   212

static void ClientStartError(const char *error)

   213

{

   214

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

   215

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   216

}

   217

   218

static void ServerStartError(const char *error)

   219

{

   220

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

   221

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   222

}

   223

   224

static void NetworkClientError(byte res, NetworkClientState* cs)

   225

{

   226

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

   227

	//  disconnection (and why!)

   228

	NetworkErrorCode errorno;

   229

   230

	// We just want to close the connection..

   231

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   232

		cs->quited = true;

   233

		NetworkCloseClient(cs);

   234

		_networking = false;

   235

   236

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   237

		return;

   238

	}

   239

   240

	switch (res) {

   241

		case NETWORK_RECV_STATUS_DESYNC:   errorno = NETWORK_ERROR_DESYNC; break;

   242

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   243

		default:                           errorno = NETWORK_ERROR_GENERAL; break;

   244

	}

   245

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

   246

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

   247

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   248

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   249

   250

		// Dequeue all commands before closing the socket

   251

		NetworkSend_Packets(DEREF_CLIENT(0));

   252

	}

   253

   254

	_switch_mode = SM_MENU;

   255

	NetworkCloseClient(cs);

   256

	_networking = false;

   257

}

   258

   259

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

   260

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

   261

 * @param err NetworkErrorCode

   262

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

   263

char *GetNetworkErrorMsg(char *buf, NetworkErrorCode err)

   264

{

   265

	/* List of possible network errors, used by

   266

	 * PACKET_SERVER_ERROR and PACKET_CLIENT_ERROR */

   267

	static const StringID network_error_strings[] = {

   268

		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,

   275

		STR_NETWORK_ERR_CLIENT_WRONG_REVISION,

   276

		STR_NETWORK_ERR_CLIENT_NAME_IN_USE,

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		STR_NETWORK_ERR_CLIENT_WRONG_PASSWORD,

   278

		STR_NETWORK_ERR_CLIENT_PLAYER_MISMATCH,

   279

		STR_NETWORK_ERR_CLIENT_KICKED,

   280

		STR_NETWORK_ERR_CLIENT_CHEATER,

   281

		STR_NETWORK_ERR_CLIENT_SERVER_FULL

   282

	};

   283

   284

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

   285

   286

	return GetString(buf, network_error_strings[err]);

   287

}

   288

   289

// Find all IP-aliases for this host

   290

static void NetworkFindIPs(void)

   291

{

   292

	int i;

   293

   294

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

   295

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

   296

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

   297

   298

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

   299

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

   300

		if (new_pos == 0) {

   301

			return B_ERROR;

   302

		}

   303

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

   304

		return B_OK;

   305

	}

   306

   307

	int output_length;

   308

	char *output_pointer = NULL;

   309

	char **output;

   310

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

   311

	i = 0;

   312

   313

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

   314

	_broadcast_list[0] = 0;

   315

   316

	if (sock < 0) {

   317

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

   318

		return;

   319

	}

   320

   321

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

   322

	if (output_length < 0) {

   323

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

   324

		return;

   325

	}

   326

   327

	output = &output_pointer;

   328

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

   329

		for (;;) {

   330

			uint32 n, fields, read;

   331

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

   332

			struct in_addr inaddr;

   333

			uint32 ip;

   334

			uint32 netmask;

   335

   336

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

   337

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

   338

			read += 1;

   339

			if (fields != 9) {

   340

				break;

   341

			}

   342

   343

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

   344

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

   345

   346

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

   347

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

   348

				_broadcast_list[i] = inaddr.s_addr;

   349

				i++;

   350

			}

   351

			if (read < 0) {

   352

				break;

   353

			}

   354

			*output += read;

   355

		}

   356

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

   357

		/*free(output_pointer);*/

   358

		/*free(output);*/

   359

		closesocket(sock);

   360

	}

   361

#elif defined(HAVE_GETIFADDRS)

   362

	struct ifaddrs *ifap, *ifa;

   363

   364

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

   365

	_broadcast_list[0] = 0;

   366

   367

	if (getifaddrs(&ifap) != 0)

   368

		return;

   369

   370

	i = 0;

   371

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

   372

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

   373

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

   374

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

   375

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

   376

		i++;

   377

	}

   378

	freeifaddrs(ifap);

   379

   380

#else /* not HAVE_GETIFADDRS */

   381

	SOCKET sock;

   382

#ifdef WIN32

   383

	DWORD len = 0;

   384

	INTERFACE_INFO ifo[MAX_INTERFACES];

   385

	uint j;

   386

#else

   387

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

   388

	struct ifconf ifconf;

   389

	const char* buf_end;

   390

	const char* p;

   391

#endif

   392

   393

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

   394

	_broadcast_list[0] = 0;

   395

   396

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   397

	if (sock == INVALID_SOCKET) return;

   398

   399

#ifdef WIN32

   400

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

   401

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

   402

		closesocket(sock);

   403

		return;

   404

	}

   405

   406

	i = 0;

   407

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

   408

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

   409

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

   410

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

   411

		 * 255.255.255.255.

   412

		 */

   413

		_broadcast_list[i++] =

   414

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

   415

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

   416

	}

   417

#else

   418

	ifconf.ifc_len = sizeof(buf);

   419

	ifconf.ifc_buf = buf;

   420

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

   421

		closesocket(sock);

   422

		return;

   423

	}

   424

   425

	i = 0;

   426

	buf_end = buf + ifconf.ifc_len;

   427

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

   428

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

   429

   430

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

   431

			struct ifreq r;

   432

   433

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

   434

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

   435

					r.ifr_flags & IFF_BROADCAST &&

   436

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

   437

				_broadcast_list[i++] =

   438

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

   439

			}

   440

		}

   441

   442

		p += sizeof(struct ifreq);

   443

#ifdef AF_LINK

   444

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

   445

#endif

   446

	}

   447

#endif

   448

   449

	closesocket(sock);

   450

#endif /* not HAVE_GETIFADDRS */

   451

   452

	_broadcast_list[i] = 0;

   453

   454

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

   455

	// Now display to the debug all the detected ips

   456

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

   457

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

   458

	}

   459

}

   460

   461

// Resolve a hostname to a inet_addr

   462

unsigned long NetworkResolveHost(const char *hostname)

   463

{

   464

	in_addr_t ip;

   465

   466

	// First try: is it an ip address?

   467

	ip = inet_addr(hostname);

   468

   469

	// If not try to resolve the name

   470

	if (ip == INADDR_NONE) {

   471

		struct hostent *he = gethostbyname(hostname);

   472

		if (he == NULL) {

   473

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

   474

		} else {

   475

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

   476

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

   477

			ip = addr.s_addr;

   478

		}

   479

	}

   480

	return ip;

   481

}

   482

   483

// Converts a string to ip/port/player

   484

//  Format: IP#player:port

   485

//

   486

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

   487

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