1

#include "stdafx.h"

     2

#include "map.h"

     3

#include "network_data.h"

     4

     5

#if defined(WITH_REV)

     6

	extern const char _openttd_revision[];

     7

#elif defined(WITH_REV_HACK)

     8

	#define WITH_REV

     9

	const char _openttd_revision[] = WITH_REV_HACK;

    10

#else

    11

	const char _openttd_revision[] = NOREV_STRING;

    12

#endif

    13

    14

    15

#ifdef ENABLE_NETWORK

    16

    17

#include "table/strings.h"

    18

#include "network_client.h"

    19

#include "network_server.h"

    20

#include "network_udp.h"

    21

#include "network_gamelist.h"

    22

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

    23

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

    24

#include "md5.h"

    25

    26

#ifdef __MORPHOS__

    27

// the library base is required here

    28

struct Library *SocketBase = NULL;

    29

#endif

    30

    31

// The listen socket for the server

    32

static SOCKET _listensocket;

    33

    34

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

    35

//  after he joined a server

    36

static Patches network_tmp_patches;

    37

    38

// The amount of clients connected

    39

static byte _network_clients_connected = 0;

    40

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

    41

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    42

    43

/* Some externs / forwards */

    47

    48

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

    49

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    50

{

    51

	NetworkClientInfo *ci;

    52

    53

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

    54

		if (ci->client_index == client_index)

    55

			return ci;

    56

    57

	return NULL;

    58

}

    59

    60

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

    61

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    62

{

    63

	NetworkClientState *cs;

    64

    65

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

    66

		if (cs->index == client_index)

    67

			return cs;

    68

    69

	return NULL;

    70

}

    71

    72

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

    73

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

    74

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

    75

{

    76

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    77

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

    78

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

    79

	else

    80

		snprintf(client_name, size, "%s", ci->client_name);

    81

}

    82

    83

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

    84

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

    85

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

    86

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

    87

{

    88

	char buf[1024];

    89

	va_list va;

    90

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

    91

	char message[1024];

    92

	char temp[1024];

    93

	StringID TempStr = STR_NULL;

    94

    95

	va_start(va, str);

    96

	vsprintf(buf, str, va);

    97

	va_end(va);

    98

    99

	switch (action) {

   100

		case NETWORK_ACTION_JOIN:

   101

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   102

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

   103

			break;

   104

		case NETWORK_ACTION_LEAVE:

   105

			GetString(temp, STR_NETWORK_ERR_LEFT);

   106

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

   107

			break;

   108

		case NETWORK_ACTION_GIVE_MONEY:

   109

			if (self_send) {

   110

				TempStr = AllocateName(name, 0);

   111

				SetDParam(0, TempStr);

   112

				SetDParam(1, atoi(buf));

   113

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   114

				DeleteName(TempStr);

   115

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

   116

			} else {

   117

				SetDParam(0, atoi(buf));

   118

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   119

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

   120

			}

   121

			break;

   122

		case NETWORK_ACTION_CHAT_PLAYER:

   123

			if (self_send) {

   124

				TempStr = AllocateName(name, 0);

   125

				SetDParam(0, TempStr);

   126

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   127

				DeleteName(TempStr);

   128

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

   129

			} else {

   130

				TempStr = AllocateName(name, 0);

   131

				SetDParam(0, TempStr);

   132

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   133

				DeleteName(TempStr);

   134

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

   135

			}

   136

			break;

   137

		case NETWORK_ACTION_CHAT_CLIENT:

   138

			if (self_send) {

   139

				TempStr = AllocateName(name, 0);

   140

				SetDParam(0, TempStr);

   141

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   142

				DeleteName(TempStr);

   143

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

   144

			} else {

   145

				TempStr = AllocateName(name, 0);

   146

				SetDParam(0, TempStr);

   147

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   148

				DeleteName(TempStr);

   149

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

   150

			}

   151

			break;

   152

		case NETWORK_ACTION_NAME_CHANGE:

   153

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   154

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

   155

			break;

   156

		default:

   157

			TempStr = AllocateName(name, 0);

   158

			SetDParam(0, TempStr);

   159

			GetString(temp, STR_NETWORK_CHAT_ALL);

   160

			DeleteName(TempStr);

   161

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

   162

			break;

   163

	}

   164

   165

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

   166

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

   167

}

   168

   169

// Calculate the frame-lag of a client

   170

uint NetworkCalculateLag(const NetworkClientState *cs)

   171

{

   172

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

   173

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

   174

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

   175

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

   176

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

   177

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

   178

   179

	return lag;

   180

}

   181

   182

   183

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

   184

//  error

   185

void NetworkError(StringID error_string)

   186

{

   187

	_switch_mode = SM_MENU;

   188

	_switch_mode_errorstr = error_string;

   189

}

   190

   191

static void ClientStartError(const char *error)

   192

{

   193

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

   194

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   195

}

   196

   197

static void ServerStartError(const char *error)

   198

{

   199

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

   200

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   201

}

   202

   203

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

   204

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

   205

	//  disconnection (and why!)

   206

	NetworkErrorCode errorno;

   207

   208

	// We just want to close the connection..

   209

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   210

		cs->quited = true;

   211

		NetworkCloseClient(cs);

   212

		_networking = false;

   213

   214

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   215

		return;

   216

	}

   217

   218

	switch(res) {

   219

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   220

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   221

		default: errorno = NETWORK_ERROR_GENERAL;

   222

	}

   223

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

   224

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

   225

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   226

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   227

   228

		// Dequeue all commands before closing the socket

   229

		NetworkSend_Packets(DEREF_CLIENT(0));

   230

	}

   231

   232

	_switch_mode = SM_MENU;

   233

	NetworkCloseClient(cs);

   234

	_networking = false;

   235

}

   236

   237

// Find all IP-aliases for this host

   238

static void NetworkFindIPs(void)

   239

{

   240

	int i, last;

   241

   242

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

   243

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

   244

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

   245

   246

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

   247

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

   248

		if (new_pos == 0) {

   249

			return B_ERROR;

   250

		}

   251

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

   252

		return B_OK;

   253

	}

   254

   255

	int output_length;

   256

	char *output_pointer = NULL;

   257

	char **output;

   258

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

   259

	i = 0;

   260

   261

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

   262

	_network_ip_list[0] = 0;

   263

   264

	if (sock < 0) {

   265

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

   266

		return;

   267

	}

   268

   269

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

   270

	if (output_length < 0) {

   271

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

   272

		return;

   273

	}

   274

   275

	output = &output_pointer;

   276

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

   277

		for (;;) {

   278

			uint32 n, fields, read;

   279

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

   280

			struct in_addr inaddr;

   281

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

   282

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

   283

			read += 1;

   284

			if (fields != 9) {

   285

				break;

   286

			}

   287

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

   288

			if (inaddr.s_addr != 0) {

   289

				_network_ip_list[i] = inaddr.s_addr;

   290

				i++;

   291

			}

   292

			if (read < 0) {

   293

				break;

   294

			}

   295

			*output += read;

   296

		}

   297

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

   298

		/*free(output_pointer);*/

   299

		/*free(output);*/

   300

		closesocket(sock);

   301

	}

   302

#elif defined(HAVE_GETIFADDRS)

   303

	struct ifaddrs *ifap, *ifa;

   304

   305

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

   306

	_network_ip_list[0] = 0;

   307

   308

	if (getifaddrs(&ifap) != 0)

   309

		return;

   310

   311

	i = 0;

   312

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

   313

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

   314

			continue;

   315

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

   316

		i++;

   317

	}

   318

	freeifaddrs(ifap);

   319

   320

#else /* not HAVE_GETIFADDRS */

   321

   322

	unsigned long len = 0;

   323

	SOCKET sock;

   324

	IFREQ ifo[MAX_INTERFACES];

   325

   326

#ifndef WIN32

   327

	struct ifconf if_conf;

   328

#endif

   329

   330

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

   331

	_network_ip_list[0] = 0;

   332

   333

	if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {

   334

		return;

   335

	}

   336

   337

#ifdef WIN32

   338

	// On windows it is easy

   339

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

   340

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

   341

		closesocket(sock);

   342

		return;

   343

	}

   344

#else

   345

	// On linux a bit harder

   346

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

   347

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

   348

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

   349

		closesocket(sock);

   350

		return;

   351

	}

   352

	len = if_conf.ifc_len;

   353

#endif /* WIN32 */

   354

   355

	// Now walk through all IPs and list them

   356

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

   357

		// Request IP for this interface

   358

#ifdef WIN32

   359

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

   360

#else

   361

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

   362

			closesocket(sock);

   363

			return;

   364

		}

   365

   366

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

   367

#endif

   368

	}

   369

   370

	closesocket(sock);

   371

   372

#endif /* not HAVE_GETIFADDRS */

   373

   374

	_network_ip_list[i] = 0;

   375

	last = i - 1;

   376

   377

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

   378

	// Now display to the debug all the detected ips

   379

	i = 0;

   380

	while (_network_ip_list[i] != 0) {

   381

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

   382

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

   383

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

   384

			if (last > i)

   385

				_network_ip_list[i] = _network_ip_list[last];

   386

			// Clear the last ip

   387

			_network_ip_list[last] = 0;

   388

			// And we have 1 ip less

   389

			last--;

   390

			continue;

   391

		}

   392

   393

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

   394

		i++;

   395

	}

   396

}

   397

   398

// Resolve a hostname to a inet_addr

   399

unsigned long NetworkResolveHost(const char *hostname)

   400

{

   401

	in_addr_t ip;

   402

   403

	// First try: is it an ip address?

   404

	ip = inet_addr(hostname);

   405

   406

	// If not try to resolve the name

   407

	if (ip == INADDR_NONE) {

   408

		struct hostent *he = gethostbyname(hostname);

   409

		if (he == NULL) {

   410

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

   411

		} else {

   412

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

   413

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

   414

			ip = addr.s_addr;

   415

		}

   416

	}

   417

	return ip;

   418

}

   419

   420

// Converts a string to ip/port/player

   421

//  Format: IP#player:port

   422

//

   423

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

   424

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

   425

// occupied by connection_string.

   426

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

   427

{

   428

	byte *p;

   429

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

   430

		if (*p == '#') {

   431

			*player = p + 1;

   432

			*p = '\0';

   433

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

   434

			*port = p + 1;

   435

			*p = '\0';

   436

		}

   437

	}

   438

}

   439

   440

// Creates a new client from a socket

   441

//   Used both by the server and the client

   442

static NetworkClientState *NetworkAllocClient(SOCKET s)

   443

{

   444

	NetworkClientState *cs;

   445

	NetworkClientInfo *ci;

   446

	byte client_no;

   447

   448

	client_no = 0;

   449

   450

	if (_network_server) {

   451

		// Can we handle a new client?

   452

		if (_network_clients_connected >= MAX_CLIENTS)

   453

			return NULL;

   454

   455

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   456

			return NULL;

   457

   458

		// Register the login

   459

		client_no = _network_clients_connected++;

   460

	}

   461

   462

	cs = &_clients[client_no];

   463

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

   464

	cs->socket = s;

   465

	cs->last_frame = 0;

   466

	cs->quited = false;

   467

   468

	if (_network_server) {

   469

		ci = DEREF_CLIENT_INFO(cs);

   470

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

   471

   472

		cs->index = _network_client_index++;

   473

		ci->client_index = cs->index;

   474

		ci->join_date = _date;

   475

   476

		InvalidateWindow(WC_CLIENT_LIST, 0);

   477

	}

   478

   479

	return cs;

   480

}

   481

   482

// Close a connection

   483

void NetworkCloseClient(NetworkClientState *cs)

   484

{

   485

	NetworkClientInfo *ci;

   486

	// Socket is already dead

   487

	if (cs->socket == INVALID_SOCKET) {

   488

		cs->quited = true;

   489

		return;

   490

	}

   491

   492