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[];

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#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;

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#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"

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

    32

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

    33

#include "md5.h"

    34

    35

#ifdef __MORPHOS__

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// 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

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

    44

//  after he joined a server

    45

static Patches network_tmp_patches;

    46

    47

// The amount of clients connected

    48

static byte _network_clients_connected = 0;

    49

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

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static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    51

    52

/* Some externs / forwards */

    53

extern void ShowJoinStatusWindow(void);

    54

extern void StateGameLoop(void);

    55

    56

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

    57

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    58

{

    59

	NetworkClientInfo *ci;

    60

    61

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

    62

		if (ci->client_index == client_index)

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			return ci;

    64

    65

	return NULL;

    66

}

    67

    68

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

    69

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    70

{

    71

	NetworkClientState *cs;

    72

    73

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

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		if (cs->index == client_index)

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			return cs;

    76

    77

	return NULL;

    78

}

    79

    80

// 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.

    82

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

    83

{

    84

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

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

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		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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}

    90

    91

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

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

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// 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, ...)

    95

{

    96

	char buf[1024];

    97

	va_list va;

    98

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

    99

	char message[1024];

   100

	char temp[1024];

   101

   102

	va_start(va, str);

   103

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

   104

	va_end(va);

   105

   106

	switch (action) {

   107

		case NETWORK_ACTION_JOIN:

   108

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   109

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

   110

			break;

   111

		case NETWORK_ACTION_LEAVE:

   112

			GetString(temp, STR_NETWORK_ERR_LEFT);

   113

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

   114

			break;

   115

		case NETWORK_ACTION_GIVE_MONEY:

   116

			if (self_send) {

   117

				SetDParamStr(0, name);

   118

				SetDParam(1, atoi(buf));

   119

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   120

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

   121

			} else {

   122

				SetDParam(0, atoi(buf));

   123

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   124

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

   125

			}

   126

			break;

   127

		case NETWORK_ACTION_CHAT_PLAYER:

   128

			if (self_send) {

   129

				SetDParamStr(0, name);

   130

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   131

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

   132

			} else {

   133

				SetDParamStr(0, name);

   134

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   135

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

   136

			}

   137

			break;

   138

		case NETWORK_ACTION_CHAT_CLIENT:

   139

			if (self_send) {

   140

				SetDParamStr(0, name);

   141

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   142

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

   143

			} else {

   144

				SetDParamStr(0, name);

   145

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   146

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

   147

			}

   148

			break;

   149

		case NETWORK_ACTION_NAME_CHANGE:

   150

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   151

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

   152

			break;

   153

		default:

   154

			SetDParamStr(0, name);

   155

			GetString(temp, STR_NETWORK_CHAT_ALL);

   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

static void NetworkError(StringID error_string)

   181

{

   182

	_switch_mode = SM_MENU;

   183

	_switch_mode_errorstr = error_string;

   184

}

   185

   186

static void ClientStartError(const char *error)

   187

{

   188

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

   189

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   190

}

   191

   192

static void ServerStartError(const char *error)

   193

{

   194

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

   195

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   196

}

   197

   198

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

   199

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

   200

	//  disconnection (and why!)

   201

	NetworkErrorCode errorno;

   202

   203

	// We just want to close the connection..

   204

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   205

		cs->quited = true;

   206

		NetworkCloseClient(cs);

   207

		_networking = false;

   208

   209

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   210

		return;

   211

	}

   212

   213

	switch(res) {

   214

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   215

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   216

		default: errorno = NETWORK_ERROR_GENERAL;

   217

	}

   218

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

   219

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

   220

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   221

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   222

   223

		// Dequeue all commands before closing the socket

   224

		NetworkSend_Packets(DEREF_CLIENT(0));

   225

	}

   226

   227

	_switch_mode = SM_MENU;

   228

	NetworkCloseClient(cs);

   229

	_networking = false;

   230

}

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   232

// Find all IP-aliases for this host

   233

static void NetworkFindIPs(void)

   234

{

   235

	int i, last;

   236

   237

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

   238

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

   239

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

   240

   241

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

   242

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

   243

		if (new_pos == 0) {

   244

			return B_ERROR;

   245

		}

   246

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

   247

		return B_OK;

   248

	}

   249

   250

	int output_length;

   251

	char *output_pointer = NULL;

   252

	char **output;

   253

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

   254

	i = 0;

   255

   256

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

   257

	_network_ip_list[0] = 0;

   258

   259

	if (sock < 0) {

   260

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

   261

		return;

   262

	}

   263

   264

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

   265

	if (output_length < 0) {

   266

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

   267

		return;

   268

	}

   269

   270

	output = &output_pointer;

   271

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

   272

		for (;;) {

   273

			uint32 n, fields, read;

   274

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

   275

			struct in_addr inaddr;

   276

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

   277

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

   278

			read += 1;

   279

			if (fields != 9) {

   280

				break;

   281

			}

   282

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

   283

			if (inaddr.s_addr != 0) {

   284

				_network_ip_list[i] = inaddr.s_addr;

   285

				i++;

   286

			}

   287

			if (read < 0) {

   288

				break;

   289

			}

   290

			*output += read;

   291

		}

   292

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

   293

		/*free(output_pointer);*/

   294

		/*free(output);*/

   295

		closesocket(sock);

   296

	}

   297

#elif defined(HAVE_GETIFADDRS)

   298

	struct ifaddrs *ifap, *ifa;

   299

   300

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

   301

	_network_ip_list[0] = 0;

   302

   303

	if (getifaddrs(&ifap) != 0)

   304

		return;

   305

   306

	i = 0;

   307

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

   308

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

   309

			continue;

   310

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

   311

		i++;

   312

	}

   313

	freeifaddrs(ifap);

   314

   315

#else /* not HAVE_GETIFADDRS */

   316

   317

	unsigned long len = 0;

   318

	SOCKET sock;

   319

	IFREQ ifo[MAX_INTERFACES];

   320

   321

#ifndef WIN32

   322

	struct ifconf if_conf;

   323

#endif

   324

   325

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

   326

	_network_ip_list[0] = 0;

   327

   328

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   329

	if (sock == INVALID_SOCKET) return;

   330

   331

#ifdef WIN32

   332

	// On windows it is easy

   333

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

   334

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

   335

		closesocket(sock);

   336

		return;

   337

	}

   338

#else

   339

	// On linux a bit harder

   340

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

   341

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

   342

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

   343

		closesocket(sock);

   344

		return;

   345

	}

   346

	len = if_conf.ifc_len;

   347

#endif /* WIN32 */

   348

   349

	// Now walk through all IPs and list them

   350

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

   351

		// Request IP for this interface

   352

#ifdef WIN32

   353

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

   354

#else

   355

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

   356

			closesocket(sock);

   357

			return;

   358

		}

   359

   360

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

   361

#endif

   362

	}

   363

   364

	closesocket(sock);

   365

   366

#endif /* not HAVE_GETIFADDRS */

   367

   368

	_network_ip_list[i] = 0;

   369

	last = i - 1;

   370

   371

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

   372

	// Now display to the debug all the detected ips

   373

	i = 0;

   374

	while (_network_ip_list[i] != 0) {

   375

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

   376

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

   377

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

   378

			if (last > i)

   379

				_network_ip_list[i] = _network_ip_list[last];

   380

			// Clear the last ip

   381

			_network_ip_list[last] = 0;

   382

			// And we have 1 ip less

   383

			last--;

   384

			continue;

   385

		}

   386

   387

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

   388

		i++;

   389

	}

   390

}

   391

   392

// Resolve a hostname to a inet_addr

   393

unsigned long NetworkResolveHost(const char *hostname)

   394

{

   395

	in_addr_t ip;

   396

   397

	// First try: is it an ip address?

   398

	ip = inet_addr(hostname);

   399

   400

	// If not try to resolve the name

   401

	if (ip == INADDR_NONE) {

   402

		struct hostent *he = gethostbyname(hostname);

   403

		if (he == NULL) {

   404

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

   405

		} else {

   406

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

   407

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

   408

			ip = addr.s_addr;

   409

		}

   410

	}

   411

	return ip;

   412

}

   413

   414

// Converts a string to ip/port/player

   415

//  Format: IP#player:port

   416

//

   417

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

   418

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

   419

// occupied by connection_string.

   420

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

   421

{

   422

	char *p;

   423

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

   424

		if (*p == '#') {

   425

			*player = p + 1;

   426

			*p = '\0';

   427

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

   428

			*port = p + 1;

   429

			*p = '\0';

   430

		}

   431

	}

   432

}

   433

   434

// Creates a new client from a socket

   435

//   Used both by the server and the client

   436

static NetworkClientState *NetworkAllocClient(SOCKET s)

   437

{

   438

	NetworkClientState *cs;

   439

	NetworkClientInfo *ci;

   440

	byte client_no;

   441

   442

	client_no = 0;

   443

   444

	if (_network_server) {

   445

		// Can we handle a new client?

   446

		if (_network_clients_connected >= MAX_CLIENTS)

   447

			return NULL;

   448

   449

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   450

			return NULL;

   451

   452

		// Register the login

   453

		client_no = _network_clients_connected++;

   454

	}

   455

   456

	cs = &_clients[client_no];

   457

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

   458

	cs->socket = s;

   459

	cs->last_frame = 0;

   460

	cs->quited = false;

   461

   462

	cs->last_frame = _frame_counter;

   463

	cs->last_frame_server = _frame_counter;

   464

   465

	if (_network_server) {

   466

		ci = DEREF_CLIENT_INFO(cs);

   467

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

   468

   469

		cs->index = _network_client_index++;

   470

		ci->client_index = cs->index;

   471

		ci->join_date = _date;

   472

   473

		InvalidateWindow(WC_CLIENT_LIST, 0);

   474

	}

   475

   476

	return cs;

   477

}

   478

   479

// Close a connection

   480

void NetworkCloseClient(NetworkClientState *cs)

   481

{

   482

	NetworkClientInfo *ci;

   483

	// Socket is already dead

   484

	if (cs->socket == INVALID_SOCKET) {

   485

		cs->quited = true;

   486

		return;

   487

	}

   488

   489

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

   490