1

#include "stdafx.h"

     2

#include "network_data.h"

     3

     4

#ifdef ENABLE_NETWORK

     5

     6

#include "table/strings.h"

     7

#include "network_server.h"

     8

#include "console.h"

     9

#include "command.h"

    10

#include "gfx.h"

    11

#include "vehicle.h"

    12

#include "station.h"

    13

#include "settings.h"

    14

    15

// This file handles all the server-commands

    16

    17

void NetworkHandleCommandQueue(ClientState *cs);

    18

void NetworkPopulateCompanyInfo(void);

    19

void NetworkSendPatchSettings(ClientState *cs);

    20

    21

// Is the network enabled?

    22

    23

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

    24

// Sending functions

    25

//   DEF_SERVER_SEND_COMMAND has parameter: ClientState *cs

    26

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

    27

    28

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

    29

{

    30

	//

    31

	// Packet: SERVER_CLIENT_INFO

    32

	// Function: Sends info about a client

    33

	// Data:

    34

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

    35

	//    uint8:  As which player the client is playing

    36

	//    String: The name of the client

    37

	//

    38

    39

	Packet *p;

    40

    41

	if (ci->client_index != NETWORK_EMPTY_INDEX) {

    42

		p = NetworkSend_Init(PACKET_SERVER_CLIENT_INFO);

    43

		NetworkSend_uint16(p, ci->client_index);

    44

		NetworkSend_uint8 (p, ci->client_playas);

    45

		NetworkSend_string(p, ci->client_name);

    46

    47

		NetworkSend_Packet(p, cs);

    48

	}

    49

}

    50

    51

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_COMPANY_INFO)

    52

{

    53

//

    54

	// Packet: SERVER_COMPANY_INFO

    55

	// Function: Sends info about the companies

    56

	// Data:

    57

	//

    58

    59

	int i;

    60

    61

	Player *player;

    62

	Packet *p;

    63

    64

	byte active = 0;

    65

	byte current = 0;

    66

    67

    68

	FOR_ALL_PLAYERS(player) {

    69

		if (player->is_active)

    70

			active++;

    71

	}

    72

    73

	if (active == 0) {

    74

		Packet *p = NetworkSend_Init(PACKET_SERVER_COMPANY_INFO);

    75

    76

		NetworkSend_uint8 (p, NETWORK_COMPANY_INFO_VERSION);

    77

		NetworkSend_uint8 (p, active);

    78

    79

		NetworkSend_Packet(p, cs);

    80

		return;

    81

	}

    82

    83

	NetworkPopulateCompanyInfo();

    84

    85

	FOR_ALL_PLAYERS(player) {

    86

		if (!player->is_active)

    87

			continue;

    88

    89

		current++;

    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, current);

    96

    97

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

    98

		NetworkSend_uint8 (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

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

   105

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

   106

   107

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

   108

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

   109

   110

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

   111

			NetworkSend_string(p, "<none>");

   112

		else

   113

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

   114

   115

		NetworkSend_Packet(p, cs);

   116

	}

   117

}

   118

   119

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

   120

{

   121

	//

   122

	// Packet: SERVER_ERROR

   123

	// Function: The client made an error

   124

	// Data:

   125

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

   126

	//

   127

   128

	ClientState *new_cs;

   129

	char str1[100], str2[100];

   130

	char client_name[NETWORK_NAME_LENGTH];

   131

   132

	Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR);

   133

	NetworkSend_uint8(p, error);

   134

	NetworkSend_Packet(p, cs);

   135

   136

	// Only send when the current client was in game

   137

	if (cs->status > STATUS_AUTH) {

   138

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

   139

   140

		GetString(str1, STR_NETWORK_ERR_LEFT);

   141

		GetString(str2, STR_NETWORK_ERR_CLIENT_GENERAL + error);

   142

   143

		DEBUG(net, 2)("[NET] %s made an error (%s) and his connection is closed", client_name, str2);

   144

   145

		NetworkTextMessage(NETWORK_ACTION_JOIN_LEAVE, 1, client_name, "%s (%s)", str1, str2);

   146

   147

		FOR_ALL_CLIENTS(new_cs) {

   148

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

   149

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

   150

				//  reason a joining failed.

   151

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

   152

					error = NETWORK_ERROR_ILLEGAL_PACKET;

   153

   154

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

   155

			}

   156

		}

   157

	} else {

   158

		DEBUG(net, 2)("[NET] Clientno %d has made an error and his connection is closed", cs->index);

   159

	}

   160

   161

	cs->quited = true;

   162

   163

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

   164

	NetworkSend_Packets(cs);

   165

   166

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

   167

	CloseClient(cs);

   168

}

   169

   170

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

   171

{

   172

	//

   173

	// Packet: SERVER_NEED_PASSWORD

   174

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

   175

	// Data:

   176

	//    uint8:  Type of password

   177

	//

   178

   179

	Packet *p = NetworkSend_Init(PACKET_SERVER_NEED_PASSWORD);

   180

	NetworkSend_uint8(p, type);

   181

	NetworkSend_Packet(p, cs);

   182

}

   183

   184

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WELCOME)

   185

{

   186

	//

   187

	// Packet: SERVER_WELCOME

   188

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

   189

	// Data:

   190

	//    uint16:  Own ClientID

   191

	//

   192

   193

	Packet *p;

   194

	ClientState *new_cs;

   195

   196

	// Invalid packet when status is AUTH or higher

   197

	if (cs->status >= STATUS_AUTH)

   198

		return;

   199

   200

	cs->status = STATUS_AUTH;

   201

	_network_game_info.clients_on++;

   202

   203

	p = NetworkSend_Init(PACKET_SERVER_WELCOME);

   204

	NetworkSend_uint16(p, cs->index);

   205

	NetworkSend_Packet(p, cs);

   206

   207

		// Transmit info about all the active clients

   208

	FOR_ALL_CLIENTS(new_cs) {

   209

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

   210

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

   211

	}

   212

	// Also send the info of the server

   213

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

   214

}

   215

   216

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_WAIT)

   217

{

   218

	//

   219

	// Packet: PACKET_SERVER_WAIT

   220

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

   221

	//             someone else is already receiving the map

   222

	// Data:

   223

	//    uint8:  Clients awaiting map

   224

	//

   225

	int waiting = 0;

   226

	ClientState *new_cs;

   227

	Packet *p;

   228

   229

	// Count how many players are waiting in the queue

   230

	FOR_ALL_CLIENTS(new_cs) {

   231

		if (new_cs->status == STATUS_MAP_WAIT)

   232

			waiting++;

   233

	}

   234

   235

	p = NetworkSend_Init(PACKET_SERVER_WAIT);

   236

	NetworkSend_uint8(p, waiting);

   237

	NetworkSend_Packet(p, cs);

   238

}

   239

   240

// This sends the map to the client

   241

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_MAP)

   242

{

   243

	//

   244

	// Packet: SERVER_MAP

   245

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

   246

	//   a lot of multiple packets)

   247

	// Data:

   248

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

   249

	//  if MAP_PACKET_START:

   250

	//    uint32: The current FrameCounter

   251

	//  if MAP_PACKET_NORMAL:

   252

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

   253

	//  if MAP_PACKET_END:

   254

	//    uint32: seed0 of player

   255

	//    uint32: seed1 of player

   256

	//      last 2 are repeated MAX_PLAYERS time

   257

	//

   258

   259

	char filename[256];

   260

	static FILE *file_pointer;

   261

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

   262

   263

	if (cs->status < STATUS_AUTH) {

   264

		// Illegal call, return error and ignore the packet

   265

		SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_AUTHORIZED);

   266

		return;

   267

	}

   268

	if (cs->status == STATUS_AUTH) {

   269

		Packet *p;

   270

   271

		// Make a dump of the current game

   272

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

   273

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

   274

   275

		file_pointer = fopen(filename, "rb");

   276

		fseek(file_pointer, 0, SEEK_END);

   277

   278

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

   279

		p = NetworkSend_Init(PACKET_SERVER_MAP);

   280

		NetworkSend_uint8(p, MAP_PACKET_START);

   281

		NetworkSend_uint32(p, _frame_counter);

   282

		NetworkSend_uint32(p, ftell(file_pointer));

   283

		NetworkSend_Packet(p, cs);

   284

   285

		fseek(file_pointer, 0, SEEK_SET);

   286

   287

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

   288

   289

		cs->status = STATUS_MAP;

   290

	}

   291

   292

	if (cs->status == STATUS_MAP) {

   293

		uint i;

   294

		int res;

   295

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

   296

			Packet *p = NetworkSend_Init(PACKET_SERVER_MAP);

   297

			NetworkSend_uint8(p, MAP_PACKET_NORMAL);

   298

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

   299

			if (ferror(file_pointer)) {

   300

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

   301

			}

   302

			p->size += res;

   303

			NetworkSend_Packet(p, cs);

   304

			if (feof(file_pointer)) {

   305

				// Done reading!

   306

				int i;

   307

				Packet *p;

   308

   309

				// XXX - Delete this when patch-settings are saved in-game

   310

				NetworkSendPatchSettings(cs);

   311

   312

				p = NetworkSend_Init(PACKET_SERVER_MAP);

   313

				NetworkSend_uint8(p, MAP_PACKET_END);

   314

				// Send the player_seeds in this packet

   315

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

   316

					NetworkSend_uint32(p, _player_seeds[i][0]);

   317

					NetworkSend_uint32(p, _player_seeds[i][1]);

   318

				}

   319

				NetworkSend_Packet(p, cs);

   320

   321

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

   322

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

   323

				cs->status = STATUS_DONE_MAP;

   324

				fclose(file_pointer);

   325

   326

				{

   327

					ClientState *new_cs;

   328

					bool new_map_client = false;

   329

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

   330

					//  and start sending him the map

   331

					FOR_ALL_CLIENTS(new_cs) {

   332

						if (new_cs->status == STATUS_MAP_WAIT) {

   333

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

   334

							if (!new_map_client) {

   335

								// If not, this client will get the map

   336

								new_cs->status = STATUS_AUTH;

   337

								new_map_client = true;

   338

								SEND_COMMAND(PACKET_SERVER_MAP)(new_cs);

   339

							} else {

   340

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

   341

								SEND_COMMAND(PACKET_SERVER_WAIT)(new_cs);

   342

							}

   343

						}

   344

					}

   345

				}

   346

   347

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

   348

				break;

   349

			}

   350

		}

   351

   352

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

   353

		NetworkSend_Packets(cs);

   354

		if (cs->packet_queue == NULL) {

   355

			// All are sent, increase the sent_packets

   356

			sent_packets *= 2;

   357

		} else {

   358

			// Not everything is sent, decrease the sent_packets

   359

			if (sent_packets > 1) sent_packets /= 2;

   360

		}

   361

	}

   362

}

   363

   364

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

   365

{

   366

	//

   367

	// Packet: SERVER_JOIN

   368

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

   369

	//     PACKET_CLIENT_MAP_OK) Mostly what directly follows is a

   370

	//     PACKET_SERVER_CLIENT_INFO

   371

	// Data:

   372

	//    uint16:  Client-Index

   373

	//

   374

   375

	Packet *p = NetworkSend_Init(PACKET_SERVER_JOIN);

   376

   377

	NetworkSend_uint16(p, client_index);

   378

   379

	NetworkSend_Packet(p, cs);

   380

}

   381

   382

   383

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_FRAME)

   384

{

   385

	//

   386

	// Packet: SERVER_FRAME

   387

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

   388

	// Data:

   389

	//    uint32: Frame Counter

   390

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

   391

	//    [uint32: general-seed-1]

   392

	//    [uint32: general-seed-2]

   393

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

   394

	//

   395

   396

	Packet *p = NetworkSend_Init(PACKET_SERVER_FRAME);

   397

	NetworkSend_uint32(p, _frame_counter);

   398

	NetworkSend_uint32(p, _frame_counter_max);

   399

#ifdef ENABLE_NETWORK_SYNC_EVERY_FRAME

   400

	NetworkSend_uint32(p, _sync_seed_1);

   401

#ifdef NETWORK_SEND_DOUBLE_SEED

   402

	NetworkSend_uint32(p, _sync_seed_2);

   403

#endif

   404

#endif

   405

	NetworkSend_Packet(p, cs);

   406

}

   407

   408

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SYNC)

   409

{

   410

	//

   411

	// Packet: SERVER_SYNC

   412

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

   413

	// Data:

   414

	//    uint32: Frame Counter

   415

	//    uint32: General-seed-1

   416

	//    [uint32: general-seed-2]

   417

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

   418

	//

   419

   420

	Packet *p = NetworkSend_Init(PACKET_SERVER_SYNC);

   421

	NetworkSend_uint32(p, _frame_counter);

   422

	NetworkSend_uint32(p, _sync_seed_1);

   423

   424

#ifdef NETWORK_SEND_DOUBLE_SEED

   425

	NetworkSend_uint32(p, _sync_seed_2);

   426

#endif

   427

	NetworkSend_Packet(p, cs);

   428

}

   429

   430

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

   431

{

   432

	//

   433

	// Packet: SERVER_COMMAND

   434

	// Function: Sends a DoCommand to the client

   435

	// Data:

   436

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

   437

	//    uint32: CommandID (see command.h)

   438

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

   439

	//    uint32: P2

   440

	//    uint32: Tile

   441

	//    uint32: decode_params

   442

	//      10 times the last one (lengthof(cp->dp))

   443

	//    uint8:  CallBackID (see callback_table.c)

   444

	//    uint32: Frame of execution

   445

	//

   446

   447

	int i;

   448

	Packet *p = NetworkSend_Init(PACKET_SERVER_COMMAND);

   449

   450

	NetworkSend_uint8(p, cp->player);

   451

	NetworkSend_uint32(p, cp->cmd);

   452

	NetworkSend_uint32(p, cp->p1);

   453

	NetworkSend_uint32(p, cp->p2);

   454

	NetworkSend_uint32(p, cp->tile);

   455

	for (i = 0; i < lengthof(cp->dp); i++) {

   456

		NetworkSend_uint32(p, cp->dp[i]);

   457

	}

   458

	NetworkSend_uint8(p, cp->callback);

   459

	NetworkSend_uint32(p, cp->frame);

   460

   461

	NetworkSend_Packet(p, cs);

   462

}

   463

   464

DEF_SERVER_SEND_COMMAND_PARAM(PACKET_SERVER_CHAT)(ClientState *cs, NetworkAction action, uint16 client_index, const char *msg)

   465

{

   466

	//

   467

	// Packet: SERVER_CHAT

   468

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

   469

	// Data:

   470

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

   471

	//    uint16:  Client-index

   472

	//    String: Message (max MAX_TEXT_MSG_LEN)

   473

	//

   474

   475

	Packet *p = NetworkSend_Init(PACKET_SERVER_CHAT);

   476

   477

	NetworkSend_uint8(p, action);

   478

	NetworkSend_uint16(p, client_index);

   479

	NetworkSend_string(p, msg);

   480

   481

	NetworkSend_Packet(p, cs);

   482

}

   483

   484

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

   485

{

   486

	//

   487

	// Packet: SERVER_ERROR_QUIT

   488

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

   489

	//      This packet informs the other clients of that.

   490

	// Data:

   491

	//    uint16:  Client-index

   492

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

   493

	//

   494

   495

	Packet *p = NetworkSend_Init(PACKET_SERVER_ERROR_QUIT);

   496

   497

	NetworkSend_uint16(p, client_index);

   498

	NetworkSend_uint8(p, errorno);

   499

   500

	NetworkSend_Packet(p, cs);

   501

}

   502

   503

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

   504

{

   505

	//

   506

	// Packet: SERVER_ERROR_QUIT

   507

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

   508

	//      of that.

   509

	// Data:

   510

	//    uint16:  Client-index

   511

	//    String: leave-message

   512

	//

   513

   514

	Packet *p = NetworkSend_Init(PACKET_SERVER_QUIT);

   515

   516

	NetworkSend_uint16(p, client_index);

   517

	NetworkSend_string(p, leavemsg);

   518

   519

	NetworkSend_Packet(p, cs);

   520

}

   521

   522

DEF_SERVER_SEND_COMMAND(PACKET_SERVER_SHUTDOWN)

   523

{

   524

	//

   525

	// Packet: SERVER_SHUTDOWN

   526

	// Function: Let the clients know that the server is closing

   527

	// Data:

   528

	//     <none>

   529

	//

   530