1

#include "stdafx.h"

     2

#include "debug.h"

     3

#include "string.h"

     4

#include "strings.h"

     5

#include "map.h"

     6

#include "network_data.h"

     7

     8

#if defined(WITH_REV)

     9

	extern const char _openttd_revision[];

    10

#elif defined(WITH_REV_HACK)

    11

	#define WITH_REV

    12

	const char _openttd_revision[] = WITH_REV_HACK;

    13

#else

    14

	const char _openttd_revision[] = NOREV_STRING;

    15

#endif

    16

    17

    18

#ifdef ENABLE_NETWORK

    19

    20

#include "table/strings.h"

    21

#include "network_client.h"

    22

#include "network_server.h"

    23

#include "network_udp.h"

    24

#include "network_gamelist.h"

    25

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

    26

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

    27

#include "md5.h"

    28

    29

#ifdef __MORPHOS__

    30

// the library base is required here

    31

struct Library *SocketBase = NULL;

    32

#endif

    33

    34

// The listen socket for the server

    35

static SOCKET _listensocket;

    36

    37

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

    38

//  after he joined a server

    39

static Patches network_tmp_patches;

    40

    41

// The amount of clients connected

    42

static byte _network_clients_connected = 0;

    43

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

    44

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    45

    46

/* Some externs / forwards */

    47

extern void ShowJoinStatusWindow(void);

    48

extern void StateGameLoop(void);

    49

    50

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

    51

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    52

{

    53

	NetworkClientInfo *ci;

    54

    55

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

    56

		if (ci->client_index == client_index)

    57

			return ci;

    58

    59

	return NULL;

    60

}

    61

    62

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

    63

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    64

{

    65

	NetworkClientState *cs;

    66

    67

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

    68

		if (cs->index == client_index)

    69

			return cs;

    70

    71

	return NULL;

    72

}

    73

    74

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

    75

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

    76

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

    77

{

    78

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    79

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

    80

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

    81

	else

    82

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

    83

}

    84

    85

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

    86

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

    87

// 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, ...)

    89

{

    90

	char buf[1024];

    91

	va_list va;

    92

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

    93

	char message[1024];

    94

	char temp[1024];

    95

	StringID TempStr = STR_NULL;

    96

    97

	va_start(va, str);

    98

	vsprintf(buf, str, va);

    99

	va_end(va);

   100

   101

	switch (action) {

   102

		case NETWORK_ACTION_JOIN:

   103

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   104

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

   105

			break;

   106

		case NETWORK_ACTION_LEAVE:

   107

			GetString(temp, STR_NETWORK_ERR_LEFT);

   108

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

   109

			break;

   110

		case NETWORK_ACTION_GIVE_MONEY:

   111

			if (self_send) {

   112

				TempStr = AllocateName(name, 0);

   113

				SetDParam(0, TempStr);

   114

				SetDParam(1, atoi(buf));

   115

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   116

				DeleteName(TempStr);

   117

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

   118

			} else {

   119

				SetDParam(0, atoi(buf));

   120

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   121

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

   122

			}

   123

			break;

   124

		case NETWORK_ACTION_CHAT_PLAYER:

   125

			if (self_send) {

   126

				TempStr = AllocateName(name, 0);

   127

				SetDParam(0, TempStr);

   128

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   129

				DeleteName(TempStr);

   130

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

   131

			} else {

   132

				TempStr = AllocateName(name, 0);

   133

				SetDParam(0, TempStr);

   134

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   135

				DeleteName(TempStr);

   136

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

   137

			}

   138

			break;

   139

		case NETWORK_ACTION_CHAT_CLIENT:

   140

			if (self_send) {

   141

				TempStr = AllocateName(name, 0);

   142

				SetDParam(0, TempStr);

   143

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   144

				DeleteName(TempStr);

   145

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

   146

			} else {

   147

				TempStr = AllocateName(name, 0);

   148

				SetDParam(0, TempStr);

   149

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   150

				DeleteName(TempStr);

   151

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

   152

			}

   153

			break;

   154

		case NETWORK_ACTION_NAME_CHANGE:

   155

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   156

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

   157

			break;

   158

		default:

   159

			TempStr = AllocateName(name, 0);

   160

			SetDParam(0, TempStr);

   161

			GetString(temp, STR_NETWORK_CHAT_ALL);

   162

			DeleteName(TempStr);

   163

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

   164

			break;

   165

	}

   166

   167

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

   168

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

   169

}

   170

   171

// Calculate the frame-lag of a client

   172

uint NetworkCalculateLag(const NetworkClientState *cs)

   173

{

   174

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

   175

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

   176

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

   177

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

   178

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

   179

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

   180

   181

	return lag;

   182

}

   183

   184

   185

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

   186

//  error

   187

static void NetworkError(StringID error_string)

   188

{

   189

	_switch_mode = SM_MENU;

   190

	_switch_mode_errorstr = error_string;

   191

}

   192

   193

static void ClientStartError(const char *error)

   194

{

   195

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

   196

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   197

}

   198

   199

static void ServerStartError(const char *error)

   200

{

   201

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

   202

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   203

}

   204

   205

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

   206

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

   207

	//  disconnection (and why!)

   208

	NetworkErrorCode errorno;

   209

   210

	// We just want to close the connection..

   211

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   212

		cs->quited = true;

   213

		NetworkCloseClient(cs);

   214

		_networking = false;

   215

   216

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   217

		return;

   218

	}

   219

   220

	switch(res) {

   221

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   222

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   223

		default: errorno = NETWORK_ERROR_GENERAL;

   224

	}

   225

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

   226

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

   227

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   228

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   229

   230

		// Dequeue all commands before closing the socket

   231

		NetworkSend_Packets(DEREF_CLIENT(0));

   232

	}

   233

   234

	_switch_mode = SM_MENU;

   235

	NetworkCloseClient(cs);

   236

	_networking = false;

   237

}

   238

   239

// Find all IP-aliases for this host

   240

static void NetworkFindIPs(void)

   241

{

   242

	int i, last;

   243

   244

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

   245

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

   246

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

   247

   248

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

   249

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

   250

		if (new_pos == 0) {

   251

			return B_ERROR;

   252

		}

   253

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

   254

		return B_OK;

   255

	}

   256

   257

	int output_length;

   258

	char *output_pointer = NULL;

   259

	char **output;

   260

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

   261

	i = 0;

   262

   263

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

   264

	_network_ip_list[0] = 0;

   265

   266

	if (sock < 0) {

   267

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

   268

		return;

   269

	}

   270

   271

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

   272

	if (output_length < 0) {

   273

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

   274

		return;

   275

	}

   276

   277

	output = &output_pointer;

   278

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

   279

		for (;;) {

   280

			uint32 n, fields, read;

   281

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

   282

			struct in_addr inaddr;

   283

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

   284

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

   285

			read += 1;

   286

			if (fields != 9) {

   287

				break;

   288

			}

   289

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

   290

			if (inaddr.s_addr != 0) {

   291

				_network_ip_list[i] = inaddr.s_addr;

   292

				i++;

   293

			}

   294

			if (read < 0) {

   295

				break;

   296

			}

   297

			*output += read;

   298

		}

   299

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

   300

		/*free(output_pointer);*/

   301

		/*free(output);*/

   302

		closesocket(sock);

   303

	}

   304

#elif defined(HAVE_GETIFADDRS)

   305

	struct ifaddrs *ifap, *ifa;

   306

   307

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

   308

	_network_ip_list[0] = 0;

   309

   310

	if (getifaddrs(&ifap) != 0)

   311

		return;

   312

   313

	i = 0;

   314

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

   315

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

   316

			continue;

   317

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

   318

		i++;

   319

	}

   320

	freeifaddrs(ifap);

   321

   322

#else /* not HAVE_GETIFADDRS */

   323

   324

	unsigned long len = 0;

   325

	SOCKET sock;

   326

	IFREQ ifo[MAX_INTERFACES];

   327

   328

#ifndef WIN32

   329

	struct ifconf if_conf;

   330

#endif

   331

   332

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

   333

	_network_ip_list[0] = 0;

   334

   335

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   336

	if (sock == INVALID_SOCKET) return;

   337

   338

#ifdef WIN32

   339

	// On windows it is easy

   340

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

   341

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

   342

		closesocket(sock);

   343

		return;

   344

	}

   345

#else

   346

	// On linux a bit harder

   347

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

   348

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

   349

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

   350

		closesocket(sock);

   351

		return;

   352

	}

   353

	len = if_conf.ifc_len;

   354

#endif /* WIN32 */

   355

   356

	// Now walk through all IPs and list them

   357

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

   358

		// Request IP for this interface

   359

#ifdef WIN32

   360

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

   361

#else

   362

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

   363

			closesocket(sock);

   364

			return;

   365

		}

   366

   367

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

   368

#endif

   369

	}

   370

   371

	closesocket(sock);

   372

   373

#endif /* not HAVE_GETIFADDRS */

   374

   375

	_network_ip_list[i] = 0;

   376

	last = i - 1;

   377

   378

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

   379

	// Now display to the debug all the detected ips

   380

	i = 0;

   381

	while (_network_ip_list[i] != 0) {

   382

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

   383

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

   384

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

   385

			if (last > i)

   386

				_network_ip_list[i] = _network_ip_list[last];

   387

			// Clear the last ip

   388

			_network_ip_list[last] = 0;

   389

			// And we have 1 ip less

   390

			last--;

   391

			continue;

   392

		}

   393

   394

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

   395

		i++;

   396

	}

   397

}

   398

   399

// Resolve a hostname to a inet_addr

   400

unsigned long NetworkResolveHost(const char *hostname)

   401

{

   402

	in_addr_t ip;

   403

   404

	// First try: is it an ip address?

   405

	ip = inet_addr(hostname);

   406

   407

	// If not try to resolve the name

   408

	if (ip == INADDR_NONE) {

   409

		struct hostent *he = gethostbyname(hostname);

   410

		if (he == NULL) {

   411

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

   412

		} else {

   413

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

   414

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

   415

			ip = addr.s_addr;

   416

		}

   417

	}

   418

	return ip;

   419

}

   420

   421

// Converts a string to ip/port/player

   422

//  Format: IP#player:port

   423

//

   424

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

   425

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

   426

// occupied by connection_string.

   427

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

   428

{

   429

	char *p;

   430

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

   431

		if (*p == '#') {

   432

			*player = p + 1;

   433

			*p = '\0';

   434

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

   435

			*port = p + 1;

   436

			*p = '\0';

   437

		}

   438

	}

   439

}

   440

   441

// Creates a new client from a socket

   442

//   Used both by the server and the client

   443

static NetworkClientState *NetworkAllocClient(SOCKET s)

   444

{

   445

	NetworkClientState *cs;

   446

	NetworkClientInfo *ci;

   447

	byte client_no;

   448

   449

	client_no = 0;

   450

   451

	if (_network_server) {

   452

		// Can we handle a new client?

   453

		if (_network_clients_connected >= MAX_CLIENTS)

   454

			return NULL;

   455

   456

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   457

			return NULL;

   458

   459

		// Register the login

   460

		client_no = _network_clients_connected++;

   461

	}

   462

   463

	cs = &_clients[client_no];

   464

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

   465

	cs->socket = s;

   466

	cs->last_frame = 0;

   467

	cs->quited = false;

   468

   469

	if (_network_server) {

   470

		ci = DEREF_CLIENT_INFO(cs);

   471

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

   472

   473

		cs->index = _network_client_index++;

   474

		ci->client_index = cs->index;

   475

		ci->join_date = _date;

   476

   477

		InvalidateWindow(WC_CLIENT_LIST, 0);

   478

	}

   479

   480

	return cs;

   481

}

   482

   483

// Close a connection

   484

void NetworkCloseClient(NetworkClientState *cs)

   485

{

   486

	NetworkClientInfo *ci;

   487

	// Socket is already dead

   488

	if (cs->socket == INVALID_SOCKET) {

   489

		cs->quited = true;

   490

		return;

   491

	}