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"

     9

    10

#if defined(WITH_REV)

    11

	extern const char _openttd_revision[];

    12

#elif defined(WITH_REV_HACK)

    13

	#define WITH_REV

    14

	const char _openttd_revision[] = WITH_REV_HACK;

    15

#else

    16

	const char _openttd_revision[] = NOREV_STRING;

    17

#endif

    18

    19

    20

#ifdef ENABLE_NETWORK

    21

    22

#include "table/strings.h"

    23

#include "network_client.h"

    24

#include "network_server.h"

    25

#include "network_udp.h"

    26

#include "network_gamelist.h"

    27

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

    28

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

    29

#include "md5.h"

    30

    31

#ifdef __MORPHOS__

    32

// the library base is required here

    33

struct Library *SocketBase = NULL;

    34

#endif

    35

    36

// The listen socket for the server

    37

static SOCKET _listensocket;

    38

    39

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

    40

//  after he joined a server

    41

static Patches network_tmp_patches;

    42

    43

// The amount of clients connected

    44

static byte _network_clients_connected = 0;

    45

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

    46

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    47

    48

/* Some externs / forwards */

    49

extern void ShowJoinStatusWindow(void);

    50

extern void StateGameLoop(void);

    51

    52

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

    53

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    54

{

    55

	NetworkClientInfo *ci;

    56

    57

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

    58

		if (ci->client_index == client_index)

    59

			return ci;

    60

    61

	return NULL;

    62

}

    63

    64

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

    65

NetworkClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    66

{

    67

	NetworkClientState *cs;

    68

    69

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

    70

		if (cs->index == client_index)

    71

			return cs;

    72

    73

	return NULL;

    74

}

    75

    76

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

    77

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

    78

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

    79

{

    80

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    81

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

    82

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

    83

	else

    84

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

    85

}

    86

    87

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

    88

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

    89

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

    90

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

    91

{

    92

	char buf[1024];

    93

	va_list va;

    94

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

    95

	char message[1024];

    96

	char temp[1024];

    97

    98

	va_start(va, str);

    99

	vsprintf(buf, str, va);

   100

	va_end(va);

   101

   102

	switch (action) {

   103

		case NETWORK_ACTION_JOIN:

   104

			GetString(temp, STR_NETWORK_CLIENT_JOINED);

   105

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

   106

			break;

   107

		case NETWORK_ACTION_LEAVE:

   108

			GetString(temp, STR_NETWORK_ERR_LEFT);

   109

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

   110

			break;

   111

		case NETWORK_ACTION_GIVE_MONEY:

   112

			if (self_send) {

   113

				SetDParamStr(0, name);

   114

				SetDParam(1, atoi(buf));

   115

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   116

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

   117

			} else {

   118

				SetDParam(0, atoi(buf));

   119

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   120

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

   121

			}

   122

			break;

   123

		case NETWORK_ACTION_CHAT_PLAYER:

   124

			if (self_send) {

   125

				SetDParamStr(0, name);

   126

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   127

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

   128

			} else {

   129

				SetDParamStr(0, name);

   130

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   131

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

   132

			}

   133

			break;

   134

		case NETWORK_ACTION_CHAT_CLIENT:

   135

			if (self_send) {

   136

				SetDParamStr(0, name);

   137

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   138

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

   139

			} else {

   140

				SetDParamStr(0, name);

   141

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   142

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

   143

			}

   144

			break;

   145

		case NETWORK_ACTION_NAME_CHANGE:

   146

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   147

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

   148

			break;

   149

		default:

   150

			SetDParamStr(0, name);

   151

			GetString(temp, STR_NETWORK_CHAT_ALL);

   152

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

   153

			break;

   154

	}

   155

   156

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

   157

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

   158

}

   159

   160

// Calculate the frame-lag of a client

   161

uint NetworkCalculateLag(const NetworkClientState *cs)

   162

{

   163

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

   164

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

   165

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

   166

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

   167

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

   168

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

   169

   170

	return lag;

   171

}

   172

   173

   174

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

   175

//  error

   176

static void NetworkError(StringID error_string)

   177

{

   178

	_switch_mode = SM_MENU;

   179

	_switch_mode_errorstr = error_string;

   180

}

   181

   182

static void ClientStartError(const char *error)

   183

{

   184

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

   185

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   186

}

   187

   188

static void ServerStartError(const char *error)

   189

{

   190

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

   191

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   192

}

   193

   194

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

   195

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

   196

	//  disconnection (and why!)

   197

	NetworkErrorCode errorno;

   198

   199

	// We just want to close the connection..

   200

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   201

		cs->quited = true;

   202

		NetworkCloseClient(cs);

   203

		_networking = false;

   204

   205

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   206

		return;

   207

	}

   208

   209

	switch(res) {

   210

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   211

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   212

		default: errorno = NETWORK_ERROR_GENERAL;

   213

	}

   214

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

   215

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

   216

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   217

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   218

   219

		// Dequeue all commands before closing the socket

   220

		NetworkSend_Packets(DEREF_CLIENT(0));

   221

	}

   222

   223

	_switch_mode = SM_MENU;

   224

	NetworkCloseClient(cs);

   225

	_networking = false;

   226

}

   227

   228

// Find all IP-aliases for this host

   229

static void NetworkFindIPs(void)

   230

{

   231

	int i, last;

   232

   233

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

   234

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

   235

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

   236

   237

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

   238

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

   239

		if (new_pos == 0) {

   240

			return B_ERROR;

   241

		}

   242

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

   243

		return B_OK;

   244

	}

   245

   246

	int output_length;

   247

	char *output_pointer = NULL;

   248

	char **output;

   249

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

   250

	i = 0;

   251

   252

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

   253

	_network_ip_list[0] = 0;

   254

   255

	if (sock < 0) {

   256

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

   257

		return;

   258

	}

   259

   260

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

   261

	if (output_length < 0) {

   262

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

   263

		return;

   264

	}

   265

   266

	output = &output_pointer;

   267

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

   268

		for (;;) {

   269

			uint32 n, fields, read;

   270

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

   271

			struct in_addr inaddr;

   272

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

   273

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

   274

			read += 1;

   275

			if (fields != 9) {

   276

				break;

   277

			}

   278

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

   279

			if (inaddr.s_addr != 0) {

   280

				_network_ip_list[i] = inaddr.s_addr;

   281

				i++;

   282

			}

   283

			if (read < 0) {

   284

				break;

   285

			}

   286

			*output += read;

   287

		}

   288

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

   289

		/*free(output_pointer);*/

   290

		/*free(output);*/

   291

		closesocket(sock);

   292

	}

   293

#elif defined(HAVE_GETIFADDRS)

   294

	struct ifaddrs *ifap, *ifa;

   295

   296

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

   297

	_network_ip_list[0] = 0;

   298

   299

	if (getifaddrs(&ifap) != 0)

   300

		return;

   301

   302

	i = 0;

   303

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

   304

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

   305

			continue;

   306

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

   307

		i++;

   308

	}

   309

	freeifaddrs(ifap);

   310

   311

#else /* not HAVE_GETIFADDRS */

   312

   313

	unsigned long len = 0;

   314

	SOCKET sock;

   315

	IFREQ ifo[MAX_INTERFACES];

   316

   317

#ifndef WIN32

   318

	struct ifconf if_conf;

   319

#endif

   320

   321

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

   322

	_network_ip_list[0] = 0;

   323

   324

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   325

	if (sock == INVALID_SOCKET) return;

   326

   327

#ifdef WIN32

   328

	// On windows it is easy

   329

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

   330

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

   331

		closesocket(sock);

   332

		return;

   333

	}

   334

#else

   335

	// On linux a bit harder

   336

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

   337

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

   338

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

   339

		closesocket(sock);

   340

		return;

   341

	}

   342

	len = if_conf.ifc_len;

   343

#endif /* WIN32 */

   344

   345

	// Now walk through all IPs and list them

   346

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

   347

		// Request IP for this interface

   348

#ifdef WIN32

   349

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

   350

#else

   351

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

   352

			closesocket(sock);

   353

			return;

   354

		}

   355

   356

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

   357

#endif

   358

	}

   359

   360

	closesocket(sock);

   361

   362

#endif /* not HAVE_GETIFADDRS */

   363

   364

	_network_ip_list[i] = 0;

   365

	last = i - 1;

   366

   367

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

   368

	// Now display to the debug all the detected ips

   369

	i = 0;

   370

	while (_network_ip_list[i] != 0) {

   371

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

   372

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

   373

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

   374

			if (last > i)

   375

				_network_ip_list[i] = _network_ip_list[last];

   376

			// Clear the last ip

   377

			_network_ip_list[last] = 0;

   378

			// And we have 1 ip less

   379

			last--;

   380

			continue;

   381

		}

   382

   383

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

   384

		i++;

   385

	}

   386

}

   387

   388

// Resolve a hostname to a inet_addr

   389

unsigned long NetworkResolveHost(const char *hostname)

   390

{

   391

	in_addr_t ip;

   392

   393

	// First try: is it an ip address?

   394

	ip = inet_addr(hostname);

   395

   396

	// If not try to resolve the name

   397

	if (ip == INADDR_NONE) {

   398

		struct hostent *he = gethostbyname(hostname);

   399

		if (he == NULL) {

   400

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

   401

		} else {

   402

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

   403

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

   404

			ip = addr.s_addr;

   405

		}

   406

	}

   407

	return ip;

   408

}

   409

   410

// Converts a string to ip/port/player

   411

//  Format: IP#player:port

   412

//

   413

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

   414

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

   415

// occupied by connection_string.

   416

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

   417

{

   418

	char *p;

   419

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

   420

		if (*p == '#') {

   421

			*player = p + 1;

   422

			*p = '\0';

   423

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

   424

			*port = p + 1;

   425

			*p = '\0';

   426

		}

   427

	}

   428

}

   429

   430

// Creates a new client from a socket

   431

//   Used both by the server and the client

   432

static NetworkClientState *NetworkAllocClient(SOCKET s)

   433

{

   434

	NetworkClientState *cs;

   435

	NetworkClientInfo *ci;

   436

	byte client_no;

   437

   438

	client_no = 0;

   439

   440

	if (_network_server) {

   441

		// Can we handle a new client?

   442

		if (_network_clients_connected >= MAX_CLIENTS)

   443

			return NULL;

   444

   445

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   446

			return NULL;

   447

   448

		// Register the login

   449

		client_no = _network_clients_connected++;

   450

	}

   451

   452

	cs = &_clients[client_no];

   453

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

   454

	cs->socket = s;

   455

	cs->last_frame = 0;

   456

	cs->quited = false;

   457

   458

	cs->last_frame = _frame_counter;

   459

	cs->last_frame_server = _frame_counter;

   460

   461

	if (_network_server) {

   462

		ci = DEREF_CLIENT_INFO(cs);

   463

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

   464

   465

		cs->index = _network_client_index++;

   466

		ci->client_index = cs->index;

   467

		ci->join_date = _date;

   468

   469

		InvalidateWindow(WC_CLIENT_LIST, 0);

   470

	}

   471

   472

	return cs;

   473

}

   474

   475

// Close a connection

   476

void NetworkCloseClient(NetworkClientState *cs)

   477

{

   478

	NetworkClientInfo *ci;

   479

	// Socket is already dead

   480

	if (cs->socket == INVALID_SOCKET) {

   481

		cs->quited = true;

   482

		return;

   483

	}

   484

   485

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

   486

   487

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

   488

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

   489

		NetworkErrorCode errorno = NETWORK_ERROR_CONNECTION_LOST;

   490

		char str[100];