1

/* $Id$ */

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#include "stdafx.h"

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#include "debug.h"

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#include "string.h"

     6

#include "strings.h"

     7

#include "network_data.h"

     8

#include "train.h"

     9

#include "date.h"

    10

    11

#ifdef ENABLE_NETWORK

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    13

#include "table/strings.h"

    14

#include "functions.h"

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#include "network_server.h"

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#include "network_udp.h"

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#include "console.h"

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#include "command.h"

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#include "gfx.h"

    20

#include "saveload.h"

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#include "vehicle.h"

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#include "station.h"

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#include "variables.h"

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#include "genworld.h"

    25

    26

// This file handles all the server-commands

    27

    28

static void NetworkHandleCommandQueue(NetworkClientState* cs);

    29

void NetworkPopulateCompanyInfo(void);

    30

    31

// **********

    32

// Sending functions

    33

//   DEF_SERVER_SEND_COMMAND has parameter: NetworkClientState *cs

    34

// **********

    35

    36

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CLIENT_INFO)(NetworkClientState *cs, NetworkClientInfo *ci)

    37

{

    38

	//

    39

	// Packet: SERVER_CLIENT_INFO

    40

	// Function: Sends info about a client

    41

	// Data:

    42

	//    uint16:  The index of the client (always unique on a server. 1 = server)

    43

	//    uint8:  As which player the client is playing

    44

	//    String: The name of the client

    45

	//    String: The unique id of the client

    46

	//

    47

    48

	Packet *p;

    49

    50

	if (ci->client_index != NETWORK_EMPTY_INDEX) {

    51

		p = NetworkSend_Init(PACKET_SERVER_CLIENT_INFO);

    52

		NetworkSend_uint16(p, ci->client_index);

    53

		NetworkSend_uint8 (p, ci->client_playas);

    54

		NetworkSend_string(p, ci->client_name);

    55

		NetworkSend_string(p, ci->unique_id);

    56

    57

		NetworkSend_Packet(p, cs);

    58

	}

    59

}

    60

    61

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_COMPANY_INFO)

    62

{

    63

//

    64

	// Packet: SERVER_COMPANY_INFO

    65

	// Function: Sends info about the companies

    66

	// Data:

    67

	//

    68

    69

	int i;

    70

    71

	Player *player;

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	Packet *p;

    73

    74

	byte active = ActivePlayerCount();

    75

    76

	if (active == 0) {

    77

		Packet *p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO);

    78

    79

		NetworkSend_uint8 (p, NETWORK_COMPANY_INFO_VERSION);

    80

		NetworkSend_uint8 (p, active);

    81

    82

		NetworkSend_Packet(p, cs);

    83

		return;

    84

	}

    85

    86

	NetworkPopulateCompanyInfo();

    87

    88

	FOR_ALL_PLAYERS(player) {

    89

		if (!player->is_active) continue;

    90

    91

		p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO);

    92

    93

		NetworkSend_uint8 (p, NETWORK_COMPANY_INFO_VERSION);

    94

		NetworkSend_uint8 (p, active);

    95

		NetworkSend_uint8 (p, player->index);

    96

    97

		NetworkSend_string(p, _network_player_info[player->index].company_name);

    98

		NetworkSend_uint32(p, _network_player_info[player->index].inaugurated_year);

    99

		NetworkSend_uint64(p, _network_player_info[player->index].company_value);

   100

		NetworkSend_uint64(p, _network_player_info[player->index].money);

   101

		NetworkSend_uint64(p, _network_player_info[player->index].income);

   102

		NetworkSend_uint16(p, _network_player_info[player->index].performance);

   103

   104

		/* Send 1 if there is a passord for the company else send 0 */

   105

		if (_network_player_info[player->index].password[0] != '\0') {

   106

			NetworkSend_uint8(p, 1);

   107

		} else {

   108

			NetworkSend_uint8(p, 0);

   109

		}

   110

   111

		for (i = 0; i < NETWORK_VEHICLE_TYPES; i++) {

   112

			NetworkSend_uint16(p, _network_player_info[player->index].num_vehicle[i]);

   113

		}

   114

   115

		for (i = 0; i < NETWORK_STATION_TYPES; i++) {

   116

			NetworkSend_uint16(p, _network_player_info[player->index].num_station[i]);

   117

		}

   118

   119

		if (_network_player_info[player->index].players[0] == '\0') {

   120

			NetworkSend_string(p, "<none>");

   121

		} else {

   122

			NetworkSend_string(p, _network_player_info[player->index].players);

   123

		}

   124

   125

		NetworkSend_Packet(p, cs);

   126

	}

   127

   128

	p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO);

   129

   130

	NetworkSend_uint8 (p, NETWORK_COMPANY_INFO_VERSION);

   131

	NetworkSend_uint8 (p, 0);

   132

   133

	NetworkSend_Packet(p, cs);

   134

}

   135

   136

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_ERROR)(NetworkClientState *cs, NetworkErrorCode error)

   137

{

   138

	//

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	// Packet: SERVER_ERROR

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	// Function: The client made an error

   141

	// Data:

   142

	//    uint8:  ErrorID (see network_data.h, NetworkErrorCode)

   143

	//

   144

   145

	NetworkClientState *new_cs;

   146

	char str[100];

   147

	char client_name[NETWORK_CLIENT_NAME_LENGTH];

   148

   149

	Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR);

   150

   151

	NetworkSend_uint8(p, error);

   152

	NetworkSend_Packet(p, cs);

   153

   154

	GetNetworkErrorMsg(str, error);

   155

   156

	// Only send when the current client was in game

   157

	if (cs->status > STATUS_AUTH) {

   158

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

   159

   160

		DEBUG(net, 2) ("[NET] '%s' made an error and has been disconnected. Reason: %s", client_name, str);

   161

   162

		NetworkTextMessage(NETWORK_ACTION_LEAVE, 1, false, client_name, "%s", str);

   163

   164

		FOR_ALL_CLIENTS(new_cs) {

   165

			if (new_cs->status > STATUS_AUTH && new_cs != cs) {

   166

				// Some errors we filter to a more general error. Clients don't have to know the real

   167

				//  reason a joining failed.

   168

				if (error == NETWORK_ERROR_NOT_AUTHORIZED || error == NETWORK_ERROR_NOT_EXPECTED || error == NETWORK_ERROR_WRONG_REVISION)

   169

					error = NETWORK_ERROR_ILLEGAL_PACKET;

   170

   171

				SEND_COMMAND(PACKET_SERVER_ERROR_QUIT)(new_cs, cs->index, error);

   172

			}

   173

		}

   174

	} else {

   175

		DEBUG(net, 2) ("[NET] Client %d made an error and has been disconnected. Reason: %s", cs->index, str);

   176

	}

   177

   178

	cs->quited = true;

   179

   180

	// Make sure the data get's there before we close the connection

   181

	NetworkSend_Packets(cs);

   182

   183

	// The client made a mistake, so drop his connection now!

   184

	NetworkCloseClient(cs);

   185

}

   186

   187

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_NEED_PASSWORD)(NetworkClientState *cs, NetworkPasswordType type)

   188

{

   189

	//

   190

	// Packet: SERVER_NEED_PASSWORD

   191

	// Function: Indication to the client that the server needs a password

   192

	// Data:

   193

	//    uint8:  Type of password

   194

	//

   195

   196

	Packet *p = NetworkSend_Init(PACKET_SERVER_NEED_PASSWORD);

   197

	NetworkSend_uint8(p, type);

   198

	NetworkSend_Packet(p, cs);

   199

}

   200

   201

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WELCOME)

   202

{

   203

	//

   204

	// Packet: SERVER_WELCOME

   205

	// Function: The client is joined and ready to receive his map

   206

	// Data:

   207

	//    uint16:  Own ClientID

   208

	//

   209

   210

	Packet *p;

   211

	const NetworkClientState *new_cs;

   212

   213

	// Invalid packet when status is AUTH or higher

   214

	if (cs->status >= STATUS_AUTH) return;

   215

   216

	cs->status = STATUS_AUTH;

   217

	_network_game_info.clients_on++;

   218

   219

	p = NetworkSend_Init(PACKET_SERVER_WELCOME);

   220

	NetworkSend_uint16(p, cs->index);

   221

	NetworkSend_Packet(p, cs);

   222

   223

		// Transmit info about all the active clients

   224

	FOR_ALL_CLIENTS(new_cs) {

   225

		if (new_cs != cs && new_cs->status > STATUS_AUTH)

   226

			SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, DEREF_CLIENT_INFO(new_cs));

   227

	}

   228

	// Also send the info of the server

   229

	SEND_COMMAND(PACKET_SERVER_CLIENT_INFO)(cs, NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX));

   230

}

   231

   232

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WAIT)

   233

{

   234

	//

   235

	// Packet: PACKET_SERVER_WAIT

   236

	// Function: The client can not receive the map at the moment because

   237

	//             someone else is already receiving the map

   238

	// Data:

   239

	//    uint8:  Clients awaiting map

   240

	//

   241

	int waiting = 0;

   242

	NetworkClientState *new_cs;

   243

	Packet *p;

   244

   245

	// Count how many players are waiting in the queue

   246

	FOR_ALL_CLIENTS(new_cs) {

   247

		if (new_cs->status == STATUS_MAP_WAIT) waiting++;

   248

	}

   249

   250

	p = NetworkSend_Init(PACKET_SERVER_WAIT);

   251

	NetworkSend_uint8(p, waiting);

   252

	NetworkSend_Packet(p, cs);

   253

}

   254

   255

// This sends the map to the client

   256

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_MAP)

   257

{

   258

	//

   259

	// Packet: SERVER_MAP

   260

	// Function: Sends the map to the client, or a part of it (it is splitted in

   261

	//   a lot of multiple packets)

   262

	// Data:

   263

	//    uint8:  packet-type (MAP_PACKET_START, MAP_PACKET_NORMAL and MAP_PACKET_END)

   264

	//  if MAP_PACKET_START:

   265

	//    uint32: The current FrameCounter

   266

	//  if MAP_PACKET_NORMAL:

   267

	//    piece of the map (till max-size of packet)

   268

	//  if MAP_PACKET_END:

   269

	//    uint32: seed0 of player

   270

	//    uint32: seed1 of player

   271

	//      last 2 are repeated MAX_PLAYERS time

   272

	//

   273

   274

	char filename[256];

   275

	static FILE *file_pointer;

   276

	static uint sent_packets; // How many packets we did send succecfully last time

   277

   278

	if (cs->status < STATUS_AUTH) {

   279

		// Illegal call, return error and ignore the packet

   280

		SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED);

   281

		return;

   282

	}

   283

	if (cs->status == STATUS_AUTH) {

   284

		Packet *p;

   285

   286

		// Make a dump of the current game

   287

		sprintf(filename, "%s%snetwork_server.tmp",  _path.autosave_dir, PATHSEP);

   288

		if (SaveOrLoad(filename, SL_SAVE) != SL_OK) error("network savedump failed");

   289

   290

		file_pointer = fopen(filename, "rb");

   291

		fseek(file_pointer, 0, SEEK_END);

   292

   293

		// Now send the _frame_counter and how many packets are coming

   294

		p = NetworkSend_Init(PACKET_SERVER_MAP);

   295

		NetworkSend_uint8(p, MAP_PACKET_START);

   296

		NetworkSend_uint32(p, _frame_counter);

   297

		NetworkSend_uint32(p, ftell(file_pointer));

   298

		NetworkSend_Packet(p, cs);

   299

   300

		fseek(file_pointer, 0, SEEK_SET);

   301

   302

		sent_packets = 4; // We start with trying 4 packets

   303

   304

		cs->status = STATUS_MAP;

   305

		/* Mark the start of download */

   306

		cs->last_frame = _frame_counter;

   307

		cs->last_frame_server = _frame_counter;

   308

	}

   309

   310

	if (cs->status == STATUS_MAP) {

   311

		uint i;

   312

		int res;

   313

		for (i = 0; i < sent_packets; i++) {

   314

			Packet *p = NetworkSend_Init(PACKET_SERVER_MAP);

   315

			NetworkSend_uint8(p, MAP_PACKET_NORMAL);

   316

			res = (int)fread(p->buffer + p->size, 1, SEND_MTU - p->size, file_pointer);

   317

			if (ferror(file_pointer)) {

   318

				error("Error reading temporary network savegame!");

   319

			}

   320

			p->size += res;

   321

			NetworkSend_Packet(p, cs);

   322

			if (feof(file_pointer)) {

   323

				// Done reading!

   324

				Packet *p = NetworkSend_Init(PACKET_SERVER_MAP);

   325

				NetworkSend_uint8(p, MAP_PACKET_END);

   326

				NetworkSend_Packet(p, cs);

   327

   328

				// Set the status to DONE_MAP, no we will wait for the client

   329

				//  to send it is ready (maybe that happens like never ;))

   330

				cs->status = STATUS_DONE_MAP;

   331

				fclose(file_pointer);

   332

   333

				{

   334

					NetworkClientState *new_cs;

   335

					bool new_map_client = false;

   336

					// Check if there is a client waiting for receiving the map

   337

					//  and start sending him the map

   338

					FOR_ALL_CLIENTS(new_cs) {

   339

						if (new_cs->status == STATUS_MAP_WAIT) {

   340

							// Check if we already have a new client to send the map to

   341

							if (!new_map_client) {

   342

								// If not, this client will get the map

   343

								new_cs->status = STATUS_AUTH;

   344

								new_map_client = true;

   345

								SEND_COMMAND(PACKET_SERVER_MAP)(new_cs);

   346

							} else {

   347

								// Else, send the other clients how many clients are in front of them

   348

								SEND_COMMAND(PACKET_SERVER_WAIT)(new_cs);

   349

							}

   350

						}

   351

					}

   352

				}

   353

   354

				// There is no more data, so break the for

   355

				break;

   356

			}

   357

		}

   358

   359

		// Send all packets (forced) and check if we have send it all

   360

		NetworkSend_Packets(cs);

   361

		if (cs->packet_queue == NULL) {

   362

			// All are sent, increase the sent_packets

   363

			sent_packets *= 2;

   364

		} else {

   365

			// Not everything is sent, decrease the sent_packets

   366

			if (sent_packets > 1) sent_packets /= 2;

   367

		}

   368

	}

   369

}

   370

   371

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_JOIN)(NetworkClientState *cs, uint16 client_index)

   372

{

   373

	//

   374

	// Packet: SERVER_JOIN

   375

	// Function: A client is joined (all active clients receive this after a

   376

	//     PACKET_CLIENT_MAP_OK) Mostly what directly follows is a

   377

	//     PACKET_SERVER_CLIENT_INFO

   378

	// Data:

   379

	//    uint16:  Client-Index

   380

	//

   381

   382

	Packet *p = NetworkSend_Init(PACKET_SERVER_JOIN);

   383

   384

	NetworkSend_uint16(p, client_index);

   385

   386

	NetworkSend_Packet(p, cs);

   387

}

   388

   389

   390

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_FRAME)

   391

{

   392

	//

   393

	// Packet: SERVER_FRAME

   394

	// Function: Sends the current frame-counter to the client

   395

	// Data:

   396

	//    uint32: Frame Counter

   397

	//    uint32: Frame Counter Max (how far may the client walk before the server?)

   398

	//    [uint32: general-seed-1]

   399

	//    [uint32: general-seed-2]

   400

	//      (last two depends on compile-settings, and are not default settings)

   401

	//

   402

   403

	Packet *p = NetworkSend_Init(PACKET_SERVER_FRAME);

   404

	NetworkSend_uint32(p, _frame_counter);

   405

	NetworkSend_uint32(p, _frame_counter_max);

   406

#ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME

   407

	NetworkSend_uint32(p, _sync_seed_1);

   408

#ifdef NETWORK_SEND_DOUBLE_SEED

   409

	NetworkSend_uint32(p, _sync_seed_2);

   410

#endif

   411

#endif

   412

	NetworkSend_Packet(p, cs);

   413

}

   414

   415

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SYNC)

   416

{

   417

	//

   418

	// Packet: SERVER_SYNC

   419

	// Function: Sends a sync-check to the client

   420

	// Data:

   421

	//    uint32: Frame Counter

   422

	//    uint32: General-seed-1

   423

	//    [uint32: general-seed-2]

   424

	//      (last one depends on compile-settings, and are not default settings)

   425

	//

   426

   427

	Packet *p = NetworkSend_Init(PACKET_SERVER_SYNC);

   428

	NetworkSend_uint32(p, _frame_counter);

   429

	NetworkSend_uint32(p, _sync_seed_1);

   430

   431

#ifdef NETWORK_SEND_DOUBLE_SEED

   432

	NetworkSend_uint32(p, _sync_seed_2);

   433

#endif

   434

	NetworkSend_Packet(p, cs);

   435

}

   436

   437

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_COMMAND)(NetworkClientState *cs, CommandPacket *cp)

   438

{

   439

	//

   440

	// Packet: SERVER_COMMAND

   441

	// Function: Sends a DoCommand to the client

   442

	// Data:

   443

	//    uint8:  PlayerID (0..MAX_PLAYERS-1)

   444

	//    uint32: CommandID (see command.h)

   445

	//    uint32: P1 (free variables used in DoCommand)

   446

	//    uint32: P2

   447

	//    uint32: Tile

   448

	//    string: text

   449

	//    uint8:  CallBackID (see callback_table.c)

   450

	//    uint32: Frame of execution

   451

	//

   452

   453

	Packet *p = NetworkSend_Init(PACKET_SERVER_COMMAND);

   454

   455

	NetworkSend_uint8(p, cp->player);

   456

	NetworkSend_uint32(p, cp->cmd);

   457

	NetworkSend_uint32(p, cp->p1);

   458

	NetworkSend_uint32(p, cp->p2);

   459

	NetworkSend_uint32(p, cp->tile);

   460

	NetworkSend_string(p, cp->text);

   461

	NetworkSend_uint8(p, cp->callback);

   462

	NetworkSend_uint32(p, cp->frame);

   463

   464

	NetworkSend_Packet(p, cs);

   465

}

   466

   467

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CHAT)(NetworkClientState *cs, NetworkAction action, uint16 client_index, bool self_send, const char *msg)

   468

{

   469

	//

   470

	// Packet: SERVER_CHAT

   471

	// Function: Sends a chat-packet to the client

   472

	// Data:

   473

	//    uint8:  ActionID (see network_data.h, NetworkAction)

   474

	//    uint16:  Client-index

   475

	//    String: Message (max MAX_TEXT_MSG_LEN)

   476

	//

   477

   478

	Packet *p = NetworkSend_Init(PACKET_SERVER_CHAT);

   479

   480

	NetworkSend_uint8(p, action);

   481

	NetworkSend_uint16(p, client_index);

   482

	NetworkSend_uint8(p, self_send);

   483

	NetworkSend_string(p, msg);

   484

   485

	NetworkSend_Packet(p, cs);

   486

}

   487

   488

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_ERROR_QUIT)(NetworkClientState *cs, uint16 client_index, NetworkErrorCode errorno)

   489

{

   490

	//

   491

	// Packet: SERVER_ERROR_QUIT

   492

	// Function: One of the clients made an error and is quiting the game

   493

	//      This packet informs the other clients of that.

   494

	// Data:

   495

	//    uint16:  Client-index

   496

	//    uint8:  ErrorID (see network_data.h, NetworkErrorCode)

   497

	//

   498

   499

	Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR_QUIT);

   500

   501

	NetworkSend_uint16(p, client_index);

   502

	NetworkSend_uint8(p, errorno);

   503

   504

	NetworkSend_Packet(p, cs);

   505

}

   506

   507

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_QUIT)(NetworkClientState *cs, uint16 client_index, const char *leavemsg)

   508

{

   509

	//

   510

	// Packet: SERVER_ERROR_QUIT

   511

	// Function: A client left the game, and this packets informs the other clients

   512

	//      of that.

   513

	// Data:

   514

	//    uint16:  Client-index

   515

	//    String: leave-message

   516

	//

   517