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)

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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

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

   107

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

   108

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

   109

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

   110

{

   111

	char buf[1024];

   112

	va_list va;

   113

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

   114

	char message[1024];

   115

	char temp[1024];

   116

   117

	va_start(va, str);

   118

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

   119

	va_end(va);

   120

   121

	switch (action) {

   122

		case NETWORK_ACTION_JOIN:

   123

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   124

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

   125

			break;

   126

		case NETWORK_ACTION_LEAVE:

   127

			GetString(temp, STR_NETWORK_ERR_LEFT);

   128

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

   129

			break;

   130

		case NETWORK_ACTION_GIVE_MONEY:

   131

			if (self_send) {

   132

				SetDParamStr(0, name);

   133

				SetDParam(1, atoi(buf));

   134

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   135

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

   136

			} else {

   137

				SetDParam(0, atoi(buf));

   138

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   139

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

   140

			}

   141

			break;

   142

		case NETWORK_ACTION_CHAT_PLAYER:

   143

			if (self_send) {

   144

				SetDParamStr(0, name);

   145

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   146

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

   147

			} else {

   148

				SetDParamStr(0, name);

   149

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   150

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

   151

			}

   152

			break;

   153

		case NETWORK_ACTION_CHAT_CLIENT:

   154

			if (self_send) {

   155

				SetDParamStr(0, name);

   156

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   157

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

   158

			} else {

   159

				SetDParamStr(0, name);

   160

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   161

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

   162

			}

   163

			break;

   164

		case NETWORK_ACTION_NAME_CHANGE:

   165

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   166

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

   167

			break;

   168

		default:

   169

			SetDParamStr(0, name);

   170

			GetString(temp, STR_NETWORK_CHAT_ALL);

   171

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

   172

			break;

   173

	}

   174

   175

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

   176

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

   177

}

   178

   179

// Calculate the frame-lag of a client

   180

uint NetworkCalculateLag(const NetworkClientState *cs)

   181

{

   182

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

   183

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

   184

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

   185

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

   186

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

   187

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

   188

   189

	return lag;

   190

}

   191

   192

   193

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

   194

//  error

   195

static void NetworkError(StringID error_string)

   196

{

   197

	_switch_mode = SM_MENU;

   198

	_switch_mode_errorstr = error_string;

   199

}

   200

   201

static void ClientStartError(const char *error)

   202

{

   203

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

   204

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   205

}

   206

   207

static void ServerStartError(const char *error)

   208

{

   209

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

   210

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   211

}

   212

   213

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

   214

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

   215

	//  disconnection (and why!)

   216

	NetworkErrorCode errorno;

   217

   218

	// We just want to close the connection..

   219

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   220

		cs->quited = true;

   221

		NetworkCloseClient(cs);

   222

		_networking = false;

   223

   224

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   225

		return;

   226

	}

   227

   228

	switch(res) {

   229

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   230

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   231

		default: errorno = NETWORK_ERROR_GENERAL;

   232

	}

   233

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

   234

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

   235

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   236

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   237

   238

		// Dequeue all commands before closing the socket

   239

		NetworkSend_Packets(DEREF_CLIENT(0));

   240

	}

   241

   242

	_switch_mode = SM_MENU;

   243

	NetworkCloseClient(cs);

   244

	_networking = false;

   245

}

   246

   247

// Find all IP-aliases for this host

   248

static void NetworkFindIPs(void)

   249

{

   250

	int i, last;

   251

   252

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

   253

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

   254

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

   255

   256

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

   257

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

   258

		if (new_pos == 0) {

   259

			return B_ERROR;

   260

		}

   261

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

   262

		return B_OK;

   263

	}

   264

   265

	int output_length;

   266

	char *output_pointer = NULL;

   267

	char **output;

   268

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

   269

	i = 0;

   270

   271

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

   272

	_network_ip_list[0] = 0;

   273

   274

	if (sock < 0) {

   275

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

   276

		return;

   277

	}

   278

   279

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

   280

	if (output_length < 0) {

   281

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

   282

		return;

   283

	}

   284

   285

	output = &output_pointer;

   286

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

   287

		for (;;) {

   288

			uint32 n, fields, read;

   289

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

   290

			struct in_addr inaddr;

   291

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

   292

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

   293

			read += 1;

   294

			if (fields != 9) {

   295

				break;

   296

			}

   297

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

   298

			if (inaddr.s_addr != 0) {

   299

				_network_ip_list[i] = inaddr.s_addr;

   300

				i++;

   301

			}

   302

			if (read < 0) {

   303

				break;

   304

			}

   305

			*output += read;

   306

		}

   307

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

   308

		/*free(output_pointer);*/

   309

		/*free(output);*/

   310

		closesocket(sock);

   311

	}

   312

#elif defined(HAVE_GETIFADDRS)

   313

	struct ifaddrs *ifap, *ifa;

   314

   315

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

   316

	_network_ip_list[0] = 0;

   317

   318

	if (getifaddrs(&ifap) != 0)

   319

		return;

   320

   321

	i = 0;

   322

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

   323

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

   324

			continue;

   325

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

   326

		i++;

   327

	}

   328

	freeifaddrs(ifap);

   329

   330

#else /* not HAVE_GETIFADDRS */

   331

   332

	unsigned long len = 0;

   333

	SOCKET sock;

   334

	IFREQ ifo[MAX_INTERFACES];

   335

   336

#ifndef WIN32

   337

	struct ifconf if_conf;

   338

#endif

   339

   340

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

   341

	_network_ip_list[0] = 0;

   342

   343

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   344

	if (sock == INVALID_SOCKET) return;

   345

   346

#ifdef WIN32

   347

	// On windows it is easy

   348

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

   349

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

   350

		closesocket(sock);

   351

		return;

   352

	}

   353

#else

   354

	// On linux a bit harder

   355

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

   356

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

   357

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

   358

		closesocket(sock);

   359

		return;

   360

	}

   361

	len = if_conf.ifc_len;

   362

#endif /* WIN32 */

   363

   364

	// Now walk through all IPs and list them

   365

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

   366

		// Request IP for this interface

   367

#ifdef WIN32

   368

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

   369

#else

   370

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

   371

			closesocket(sock);

   372

			return;

   373

		}

   374

   375

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

   376

#endif

   377

	}

   378

   379

	closesocket(sock);

   380

   381

#endif /* not HAVE_GETIFADDRS */

   382

   383

	_network_ip_list[i] = 0;

   384

	last = i - 1;

   385

   386

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

   387

	// Now display to the debug all the detected ips

   388

	i = 0;

   389

	while (_network_ip_list[i] != 0) {

   390

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

   391

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

   392

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

   393

			if (last > i)

   394

				_network_ip_list[i] = _network_ip_list[last];

   395

			// Clear the last ip

   396

			_network_ip_list[last] = 0;

   397

			// And we have 1 ip less

   398

			last--;

   399

			continue;

   400

		}

   401

   402

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

   403

		i++;

   404

	}

   405

}

   406

   407

// Resolve a hostname to a inet_addr

   408

unsigned long NetworkResolveHost(const char *hostname)

   409

{

   410

	in_addr_t ip;

   411

   412

	// First try: is it an ip address?

   413

	ip = inet_addr(hostname);

   414

   415

	// If not try to resolve the name

   416

	if (ip == INADDR_NONE) {

   417

		struct hostent *he = gethostbyname(hostname);

   418

		if (he == NULL) {

   419

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

   420

		} else {

   421

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

   422

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

   423

			ip = addr.s_addr;

   424

		}

   425

	}

   426

	return ip;

   427

}

   428

   429

// Converts a string to ip/port/player

   430

//  Format: IP#player:port

   431

//

   432

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

   433

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

   434

// occupied by connection_string.

   435

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

   436

{

   437

	char *p;

   438

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

   439

		if (*p == '#') {

   440

			*player = p + 1;

   441

			*p = '\0';

   442

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

   443

			*port = p + 1;

   444

			*p = '\0';

   445

		}

   446

	}

   447

}

   448

   449

// Creates a new client from a socket

   450

//   Used both by the server and the client

   451

static NetworkClientState *NetworkAllocClient(SOCKET s)

   452

{

   453

	NetworkClientState *cs;

   454

	NetworkClientInfo *ci;

   455

	byte client_no;

   456

   457

	client_no = 0;

   458

   459

	if (_network_server) {

   460

		// Can we handle a new client?

   461

		if (_network_clients_connected >= MAX_CLIENTS)

   462

			return NULL;

   463

   464

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   465

			return NULL;

   466

   467

		// Register the login

   468

		client_no = _network_clients_connected++;

   469

	}

   470

   471

	cs = &_clients[client_no];

   472

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

   473

	cs->socket = s;

   474

	cs->last_frame = 0;

   475

	cs->quited = false;

   476

   477

	cs->last_frame = _frame_counter;

   478

	cs->last_frame_server = _frame_counter;

   479

   480

	if (_network_server) {

   481

		ci = DEREF_CLIENT_INFO(cs);

   482

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

   483

   484

		cs->index = _network_client_index++;

   485

		ci->client_index = cs->index;

   486

		ci->join_date = _date;

   487

   488

		InvalidateWindow(WC_CLIENT_LIST, 0);

   489

	}

   490