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[];

    16

#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;

    21

#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"

    31

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

    32

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

    33

#include "md5.h"

    34

    35

#ifdef __MORPHOS__

    36

// 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)

    50

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)

    63

			return ci;

    64

    65

	return NULL;

    66

}

    67

    68

/** Return the CI for a given IP

    69

 * @param ip IP of the client we are looking for. This must be in string-format

    70

 * @return return a pointer to the corresponding NetworkClientInfo struct or NULL on failure */

    71

NetworkClientInfo *NetworkFindClientInfoFromIP(const char *ip)

    72

{

    73

	NetworkClientInfo *ci;

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	uint32 ip_number = inet_addr(ip);

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    76

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

    77

		if (ci->client_ip == ip_number) return ci;

    78

	}

    79

    80

	return NULL;

    81

}

    82

    83

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

    84

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    85

{

    86

	NetworkClientState *cs;

    87

    88

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

    89

		if (cs->index == client_index)

    90

			return cs;

    91

    92

	return NULL;

    93

}

    94

    95

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

    96

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

    97

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

    98

{

    99

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

   100

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

   101

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

   102

	else

   103

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

   104

}

   105

   106

byte NetworkSpectatorCount(void)

   107

{

   108

	const NetworkClientState *cs;

   109

	byte count = 0;

   110

   111

	FOR_ALL_CLIENTS(cs) {

   112

		if (DEREF_CLIENT_INFO(cs)->client_playas == OWNER_SPECTATOR) count++;

   113

	}

   114

   115

	return count;

   116

}

   117

   118

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

   119

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

   120

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

   121

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

   122

{

   123

	char buf[1024];

   124

	va_list va;

   125

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

   126

	char message[1024];

   127

	char temp[1024];

   128

   129

	va_start(va, str);

   130

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

   131

	va_end(va);

   132

   133

	switch (action) {

   134

		case NETWORK_ACTION_JOIN:

   135

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   136

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

   137

			break;

   138

		case NETWORK_ACTION_LEAVE:

   139

			GetString(temp, STR_NETWORK_ERR_LEFT);

   140

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

   141

			break;

   142

		case NETWORK_ACTION_GIVE_MONEY:

   143

			if (self_send) {

   144

				SetDParamStr(0, name);

   145

				SetDParam(1, atoi(buf));

   146

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   147

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

   148

			} else {

   149

				SetDParam(0, atoi(buf));

   150

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   151

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

   152

			}

   153

			break;

   154

		case NETWORK_ACTION_CHAT_PLAYER:

   155

			if (self_send) {

   156

				SetDParamStr(0, name);

   157

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   158

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

   159

			} else {

   160

				SetDParamStr(0, name);

   161

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   162

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

   163

			}

   164

			break;

   165

		case NETWORK_ACTION_CHAT_CLIENT:

   166

			if (self_send) {

   167

				SetDParamStr(0, name);

   168

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   169

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

   170

			} else {

   171

				SetDParamStr(0, name);

   172

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   173

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

   174

			}

   175

			break;

   176

		case NETWORK_ACTION_NAME_CHANGE:

   177

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   178

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

   179

			break;

   180

		default:

   181

			SetDParamStr(0, name);

   182

			GetString(temp, STR_NETWORK_CHAT_ALL);

   183

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

   184

			break;

   185

	}

   186

   187

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

   188

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

   189

}

   190

   191

// Calculate the frame-lag of a client

   192

uint NetworkCalculateLag(const NetworkClientState *cs)

   193

{

   194

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

   195

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

   196

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

   197

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

   198

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

   199

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

   200

   201

	return lag;

   202

}

   203

   204

   205

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

   206

//  error

   207

static void NetworkError(StringID error_string)

   208

{

   209

	_switch_mode = SM_MENU;

   210

	_switch_mode_errorstr = error_string;

   211

}

   212

   213

static void ClientStartError(const char *error)

   214

{

   215

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

   216

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   217

}

   218

   219

static void ServerStartError(const char *error)

   220

{

   221

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

   222

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   223

}

   224

   225

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

   226

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

   227

	//  disconnection (and why!)

   228

	NetworkErrorCode errorno;

   229

   230

	// We just want to close the connection..

   231

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   232

		cs->quited = true;

   233

		NetworkCloseClient(cs);

   234

		_networking = false;

   235

   236

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   237

		return;

   238

	}

   239

   240

	switch(res) {

   241

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   242

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   243

		default: errorno = NETWORK_ERROR_GENERAL;

   244

	}

   245

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

   246

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

   247

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   248

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   249

   250

		// Dequeue all commands before closing the socket

   251

		NetworkSend_Packets(DEREF_CLIENT(0));

   252

	}

   253

   254

	_switch_mode = SM_MENU;

   255

	NetworkCloseClient(cs);

   256

	_networking = false;

   257

}

   258

   259

// Find all IP-aliases for this host

   260

static void NetworkFindIPs(void)

   261

{

   262

	int i, last;

   263

   264

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

   265

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

   266

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

   267

   268

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

   269

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

   270

		if (new_pos == 0) {

   271

			return B_ERROR;

   272

		}

   273

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

   274

		return B_OK;

   275

	}

   276

   277

	int output_length;

   278

	char *output_pointer = NULL;

   279

	char **output;

   280

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

   281

	i = 0;

   282

   283

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

   284

	_network_ip_list[0] = 0;

   285

   286

	if (sock < 0) {

   287

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

   288

		return;

   289

	}

   290

   291

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

   292

	if (output_length < 0) {

   293

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

   294

		return;

   295

	}

   296

   297

	output = &output_pointer;

   298

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

   299

		for (;;) {

   300

			uint32 n, fields, read;

   301

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

   302

			struct in_addr inaddr;

   303

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

   304

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

   305

			read += 1;

   306

			if (fields != 9) {

   307

				break;

   308

			}

   309

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

   310

			if (inaddr.s_addr != 0) {

   311

				_network_ip_list[i] = inaddr.s_addr;

   312

				i++;

   313

			}

   314

			if (read < 0) {

   315

				break;

   316

			}

   317

			*output += read;

   318

		}

   319

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

   320

		/*free(output_pointer);*/

   321

		/*free(output);*/

   322

		closesocket(sock);

   323

	}

   324

#elif defined(HAVE_GETIFADDRS)

   325

	struct ifaddrs *ifap, *ifa;

   326

   327

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

   328

	_network_ip_list[0] = 0;

   329

   330

	if (getifaddrs(&ifap) != 0)

   331

		return;

   332

   333

	i = 0;

   334

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

   335

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

   336

			continue;

   337

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

   338

		i++;

   339

	}

   340

	freeifaddrs(ifap);

   341

   342

#else /* not HAVE_GETIFADDRS */

   343

   344

	unsigned long len = 0;

   345

	SOCKET sock;

   346

	IFREQ ifo[MAX_INTERFACES];

   347

   348

#ifndef WIN32

   349

	struct ifconf if_conf;

   350

#endif

   351

   352

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

   353

	_network_ip_list[0] = 0;

   354

   355

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   356

	if (sock == INVALID_SOCKET) return;

   357

   358

#ifdef WIN32

   359

	// On windows it is easy

   360

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

   361

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

   362

		closesocket(sock);

   363

		return;

   364

	}

   365

#else

   366

	// On linux a bit harder

   367

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

   368

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

   369

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

   370

		closesocket(sock);

   371

		return;

   372

	}

   373

	len = if_conf.ifc_len;

   374

#endif /* WIN32 */

   375

   376

	// Now walk through all IPs and list them

   377

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

   378

		// Request IP for this interface

   379

#ifdef WIN32

   380

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

   381

#else

   382

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

   383

			closesocket(sock);

   384

			return;

   385

		}

   386

   387

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

   388

#endif

   389

	}

   390

   391

	closesocket(sock);

   392

   393

#endif /* not HAVE_GETIFADDRS */

   394

   395

	_network_ip_list[i] = 0;

   396

	last = i - 1;

   397

   398

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

   399

	// Now display to the debug all the detected ips

   400

	i = 0;

   401

	while (_network_ip_list[i] != 0) {

   402

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

   403

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

   404

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

   405

			if (last > i)

   406

				_network_ip_list[i] = _network_ip_list[last];

   407

			// Clear the last ip

   408

			_network_ip_list[last] = 0;

   409

			// And we have 1 ip less

   410

			last--;

   411

			continue;

   412

		}

   413

   414

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

   415

		i++;

   416

	}

   417

}

   418

   419

// Resolve a hostname to a inet_addr

   420

unsigned long NetworkResolveHost(const char *hostname)

   421

{

   422

	in_addr_t ip;

   423

   424

	// First try: is it an ip address?

   425

	ip = inet_addr(hostname);

   426

   427

	// If not try to resolve the name

   428

	if (ip == INADDR_NONE) {

   429

		struct hostent *he = gethostbyname(hostname);

   430

		if (he == NULL) {

   431

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

   432

		} else {

   433

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

   434

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

   435

			ip = addr.s_addr;

   436

		}

   437

	}

   438

	return ip;

   439

}

   440

   441

// Converts a string to ip/port/player

   442

//  Format: IP#player:port

   443

//

   444

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

   445

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

   446

// occupied by connection_string.

   447

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

   448

{

   449

	char *p;

   450

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

   451

		if (*p == '#') {

   452

			*player = p + 1;

   453

			*p = '\0';

   454

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

   455

			*port = p + 1;

   456

			*p = '\0';

   457

		}

   458

	}

   459

}

   460

   461

// Creates a new client from a socket

   462

//   Used both by the server and the client

   463

static NetworkClientState *NetworkAllocClient(SOCKET s)

   464

{

   465

	NetworkClientState *cs;

   466

	NetworkClientInfo *ci;

   467

	byte client_no;

   468

   469

	client_no = 0;

   470

   471

	if (_network_server) {

   472

		// Can we handle a new client?

   473

		if (_network_clients_connected >= MAX_CLIENTS)

   474

			return NULL;

   475

   476

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   477

			return NULL;

   478

   479

		// Register the login

   480

		client_no = _network_clients_connected++;

   481

	}

   482

   483

	cs = &_clients[client_no];

   484

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

   485

	cs->socket = s;

   486

	cs->last_frame = 0;

   487

	cs->quited = false;

   488

   489

	cs->last_frame = _frame_counter;

   490

	cs->last_frame_server = _frame_counter;