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

#include "command.h"

     8

     9

#if defined(WITH_REV)

    10

	extern const char _openttd_revision[];

    11

#elif defined(WITH_REV_HACK)

    12

	#define WITH_REV

    13

	const char _openttd_revision[] = WITH_REV_HACK;

    14

#else

    15

	const char _openttd_revision[] = NOREV_STRING;

    16

#endif

    17

    18

    19

#ifdef ENABLE_NETWORK

    20

    21

#include "table/strings.h"

    22

#include "network_client.h"

    23

#include "network_server.h"

    24

#include "network_udp.h"

    25

#include "network_gamelist.h"

    26

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

    27

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

    28

#include "md5.h"

    29

    30

#ifdef __MORPHOS__

    31

// the library base is required here

    32

struct Library *SocketBase = NULL;

    33

#endif

    34

    35

// The listen socket for the server

    36

static SOCKET _listensocket;

    37

    38

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

    39

//  after he joined a server

    40

static Patches network_tmp_patches;

    41

    42

// The amount of clients connected

    43

static byte _network_clients_connected = 0;

    44

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

    45

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    46

    47

/* Some externs / forwards */

    48

extern void ShowJoinStatusWindow(void);

    49

extern void StateGameLoop(void);

    50

    51

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

    52

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    53

{

    54

	NetworkClientInfo *ci;

    55

    56

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

    57

		if (ci->client_index == client_index)

    58

			return ci;

    59

    60

	return NULL;

    61

}

    62

    63

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

    64

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    65

{

    66

	NetworkClientState *cs;

    67

    68

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

    69

		if (cs->index == client_index)

    70

			return cs;

    71

    72

	return NULL;

    73

}

    74

    75

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

    76

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

    77

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

    78

{

    79

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    80

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

    81

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

    82

	else

    83

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

    84

}

    85

    86

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

    87

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

    88

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

    89

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

    90

{

    91

	char buf[1024];

    92

	va_list va;

    93

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

    94

	char message[1024];

    95

	char temp[1024];

    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

				SetDParamStr(0, name);

   113

				SetDParam(1, atoi(buf));

   114

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   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

				SetDParamStr(0, name);

   125

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   126

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

   127

			} else {

   128

				SetDParamStr(0, name);

   129

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   130

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

   131

			}

   132

			break;

   133

		case NETWORK_ACTION_CHAT_CLIENT:

   134

			if (self_send) {

   135

				SetDParamStr(0, name);

   136

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   137

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

   138

			} else {

   139

				SetDParamStr(0, name);

   140

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   141

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

   142

			}

   143

			break;

   144

		case NETWORK_ACTION_NAME_CHANGE:

   145

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   146

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

   147

			break;

   148

		default:

   149

			SetDParamStr(0, name);

   150

			GetString(temp, STR_NETWORK_CHAT_ALL);

   151

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

   152

			break;

   153

	}

   154

   155

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

   156

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

   157

}

   158

   159

// Calculate the frame-lag of a client

   160

uint NetworkCalculateLag(const NetworkClientState *cs)

   161

{

   162

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

   163

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

   164

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

   165

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

   166

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

   167

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

   168

   169

	return lag;

   170

}

   171

   172

   173

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

   174

//  error

   175

static void NetworkError(StringID error_string)

   176

{

   177

	_switch_mode = SM_MENU;

   178

	_switch_mode_errorstr = error_string;

   179

}

   180

   181

static void ClientStartError(const char *error)

   182

{

   183

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

   184

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   185

}

   186

   187

static void ServerStartError(const char *error)

   188

{

   189

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

   190

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   191

}

   192

   193

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

   194

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

   195

	//  disconnection (and why!)

   196

	NetworkErrorCode errorno;

   197

   198

	// We just want to close the connection..

   199

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   200

		cs->quited = true;

   201

		NetworkCloseClient(cs);

   202

		_networking = false;

   203

   204

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   205

		return;

   206

	}

   207

   208

	switch(res) {

   209

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   210

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   211

		default: errorno = NETWORK_ERROR_GENERAL;

   212

	}

   213

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

   214

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

   215

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   216

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   217

   218

		// Dequeue all commands before closing the socket

   219

		NetworkSend_Packets(DEREF_CLIENT(0));

   220

	}

   221

   222

	_switch_mode = SM_MENU;

   223

	NetworkCloseClient(cs);

   224

	_networking = false;

   225

}

   226

   227

// Find all IP-aliases for this host

   228

static void NetworkFindIPs(void)

   229

{

   230

	int i, last;

   231

   232

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

   233

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

   234

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

   235

   236

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

   237

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

   238

		if (new_pos == 0) {

   239

			return B_ERROR;

   240

		}

   241

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

   242

		return B_OK;

   243

	}

   244

   245

	int output_length;

   246

	char *output_pointer = NULL;

   247

	char **output;

   248

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

   249

	i = 0;

   250

   251

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

   252

	_network_ip_list[0] = 0;

   253

   254

	if (sock < 0) {

   255

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

   256

		return;

   257

	}

   258

   259

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

   260

	if (output_length < 0) {

   261

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

   262

		return;

   263

	}

   264

   265

	output = &output_pointer;

   266

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

   267

		for (;;) {

   268

			uint32 n, fields, read;

   269

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

   270

			struct in_addr inaddr;

   271

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

   272

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

   273

			read += 1;

   274

			if (fields != 9) {

   275

				break;

   276

			}

   277

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

   278

			if (inaddr.s_addr != 0) {

   279

				_network_ip_list[i] = inaddr.s_addr;

   280

				i++;

   281

			}

   282

			if (read < 0) {

   283

				break;

   284

			}

   285

			*output += read;

   286

		}

   287

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

   288

		/*free(output_pointer);*/

   289

		/*free(output);*/

   290

		closesocket(sock);

   291

	}

   292

#elif defined(HAVE_GETIFADDRS)

   293

	struct ifaddrs *ifap, *ifa;

   294

   295

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

   296

	_network_ip_list[0] = 0;

   297

   298

	if (getifaddrs(&ifap) != 0)

   299

		return;

   300

   301

	i = 0;

   302

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

   303

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

   304

			continue;

   305

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

   306

		i++;

   307

	}

   308

	freeifaddrs(ifap);

   309

   310

#else /* not HAVE_GETIFADDRS */

   311

   312

	unsigned long len = 0;

   313

	SOCKET sock;

   314

	IFREQ ifo[MAX_INTERFACES];

   315

   316

#ifndef WIN32

   317

	struct ifconf if_conf;

   318

#endif

   319

   320

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

   321

	_network_ip_list[0] = 0;

   322

   323

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   324

	if (sock == INVALID_SOCKET) return;

   325

   326

#ifdef WIN32

   327

	// On windows it is easy

   328

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

   329

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

   330

		closesocket(sock);

   331

		return;

   332

	}

   333

#else

   334

	// On linux a bit harder

   335

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

   336

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

   337

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

   338

		closesocket(sock);

   339

		return;

   340

	}

   341

	len = if_conf.ifc_len;

   342

#endif /* WIN32 */

   343

   344

	// Now walk through all IPs and list them

   345

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

   346

		// Request IP for this interface

   347

#ifdef WIN32

   348

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

   349

#else

   350

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

   351

			closesocket(sock);

   352

			return;

   353

		}

   354

   355

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

   356

#endif

   357

	}

   358

   359

	closesocket(sock);

   360

   361

#endif /* not HAVE_GETIFADDRS */

   362

   363

	_network_ip_list[i] = 0;

   364

	last = i - 1;

   365

   366

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

   367

	// Now display to the debug all the detected ips

   368

	i = 0;

   369

	while (_network_ip_list[i] != 0) {

   370

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

   371

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

   372

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

   373

			if (last > i)

   374

				_network_ip_list[i] = _network_ip_list[last];

   375

			// Clear the last ip

   376

			_network_ip_list[last] = 0;

   377

			// And we have 1 ip less

   378

			last--;

   379

			continue;

   380

		}

   381

   382

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

   383

		i++;

   384

	}

   385

}

   386

   387

// Resolve a hostname to a inet_addr

   388

unsigned long NetworkResolveHost(const char *hostname)

   389

{

   390

	in_addr_t ip;

   391

   392

	// First try: is it an ip address?

   393

	ip = inet_addr(hostname);

   394

   395

	// If not try to resolve the name

   396

	if (ip == INADDR_NONE) {

   397

		struct hostent *he = gethostbyname(hostname);

   398

		if (he == NULL) {

   399

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

   400

		} else {

   401

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

   402

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

   403

			ip = addr.s_addr;

   404

		}

   405

	}

   406

	return ip;

   407

}

   408

   409

// Converts a string to ip/port/player

   410

//  Format: IP#player:port

   411

//

   412

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

   413

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

   414

// occupied by connection_string.

   415

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

   416

{

   417

	char *p;

   418

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

   419

		if (*p == '#') {

   420

			*player = p + 1;

   421

			*p = '\0';

   422

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

   423

			*port = p + 1;

   424

			*p = '\0';

   425

		}

   426

	}

   427

}

   428

   429

// Creates a new client from a socket

   430

//   Used both by the server and the client

   431

static NetworkClientState *NetworkAllocClient(SOCKET s)

   432

{

   433

	NetworkClientState *cs;

   434

	NetworkClientInfo *ci;

   435

	byte client_no;

   436

   437

	client_no = 0;

   438

   439

	if (_network_server) {

   440

		// Can we handle a new client?

   441

		if (_network_clients_connected >= MAX_CLIENTS)

   442

			return NULL;

   443

   444

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   445

			return NULL;

   446

   447

		// Register the login

   448

		client_no = _network_clients_connected++;

   449

	}

   450

   451

	cs = &_clients[client_no];

   452

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

   453

	cs->socket = s;

   454

	cs->last_frame = 0;

   455

	cs->quited = false;

   456

   457

	cs->last_frame = _frame_counter;

   458

	cs->last_frame_server = _frame_counter;

   459

   460

	if (_network_server) {

   461

		ci = DEREF_CLIENT_INFO(cs);

   462

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

   463

   464

		cs->index = _network_client_index++;

   465

		ci->client_index = cs->index;

   466

		ci->join_date = _date;

   467

   468

		InvalidateWindow(WC_CLIENT_LIST, 0);

   469

	}

   470

   471

	return cs;

   472

}

   473

   474

// Close a connection

   475

void NetworkCloseClient(NetworkClientState *cs)

   476

{

   477

	NetworkClientInfo *ci;

   478

	// Socket is already dead

   479

	if (cs->socket == INVALID_SOCKET) {

   480

		cs->quited = true;

   481

		return;

   482

	}

   483

   484

	DEBUG(net, 1) ("[NET] Closed client connection");

   485

   486

	if (!cs->quited && _network_server && cs->status > STATUS_INACTIVE) {

   487

		// We did not receive a leave message from this client...

   488

		NetworkErrorCode errorno = NETWORK_ERROR_CONNECTION_LOST;

   489

		char str[100];

   490

		char client_name[NETWORK_NAME_LENGTH];