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

	StringID TempStr = STR_NULL;

    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

				TempStr = AllocateName(name, 0);

   114

				SetDParam(0, TempStr);

   115

				SetDParam(1, atoi(buf));

   116

				GetString(temp, STR_NETWORK_GAVE_MONEY_AWAY);

   117

				DeleteName(TempStr);

   118

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

   119

			} else {

   120

				SetDParam(0, atoi(buf));

   121

				GetString(temp, STR_NETWORK_GIVE_MONEY);

   122

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

   123

			}

   124

			break;

   125

		case NETWORK_ACTION_CHAT_PLAYER:

   126

			if (self_send) {

   127

				TempStr = AllocateName(name, 0);

   128

				SetDParam(0, TempStr);

   129

				GetString(temp, STR_NETWORK_CHAT_TO_COMPANY);

   130

				DeleteName(TempStr);

   131

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

   132

			} else {

   133

				TempStr = AllocateName(name, 0);

   134

				SetDParam(0, TempStr);

   135

				GetString(temp, STR_NETWORK_CHAT_COMPANY);

   136

				DeleteName(TempStr);

   137

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

   138

			}

   139

			break;

   140

		case NETWORK_ACTION_CHAT_CLIENT:

   141

			if (self_send) {

   142

				TempStr = AllocateName(name, 0);

   143

				SetDParam(0, TempStr);

   144

				GetString(temp, STR_NETWORK_CHAT_TO_CLIENT);

   145

				DeleteName(TempStr);

   146

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

   147

			} else {

   148

				TempStr = AllocateName(name, 0);

   149

				SetDParam(0, TempStr);

   150

				GetString(temp, STR_NETWORK_CHAT_CLIENT);

   151

				DeleteName(TempStr);

   152

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

   153

			}

   154

			break;

   155

		case NETWORK_ACTION_NAME_CHANGE:

   156

			GetString(temp, STR_NETWORK_NAME_CHANGE);

   157

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

   158

			break;

   159

		default:

   160

			TempStr = AllocateName(name, 0);

   161

			SetDParam(0, TempStr);

   162

			GetString(temp, STR_NETWORK_CHAT_ALL);

   163

			DeleteName(TempStr);

   164

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

   165

			break;

   166

	}

   167

   168

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

   169

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

   170

}

   171

   172

// Calculate the frame-lag of a client

   173

uint NetworkCalculateLag(const NetworkClientState *cs)

   174

{

   175

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

   176

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

   177

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

   178

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

   179

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

   180

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

   181

   182

	return lag;

   183

}

   184

   185

   186

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

   187

//  error

   188

static void NetworkError(StringID error_string)

   189

{

   190

	_switch_mode = SM_MENU;

   191

	_switch_mode_errorstr = error_string;

   192

}

   193

   194

static void ClientStartError(const char *error)

   195

{

   196

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

   197

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   198

}

   199

   200

static void ServerStartError(const char *error)

   201

{

   202

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

   203

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   204

}

   205

   206

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

   207

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

   208

	//  disconnection (and why!)

   209

	NetworkErrorCode errorno;

   210

   211

	// We just want to close the connection..

   212

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   213

		cs->quited = true;

   214

		NetworkCloseClient(cs);

   215

		_networking = false;

   216

   217

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   218

		return;

   219

	}

   220

   221

	switch(res) {

   222

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   223

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   224

		default: errorno = NETWORK_ERROR_GENERAL;

   225

	}

   226

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

   227

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

   228

			res != NETWORK_RECV_STATUS_SERVER_BANNED) {

   229

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   230

   231

		// Dequeue all commands before closing the socket

   232

		NetworkSend_Packets(DEREF_CLIENT(0));

   233

	}

   234

   235

	_switch_mode = SM_MENU;

   236

	NetworkCloseClient(cs);

   237

	_networking = false;

   238

}

   239

   240

// Find all IP-aliases for this host

   241

static void NetworkFindIPs(void)

   242

{

   243

	int i, last;

   244

   245

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

   246

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

   247

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

   248

   249

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

   250

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

   251

		if (new_pos == 0) {

   252

			return B_ERROR;

   253

		}

   254

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

   255

		return B_OK;

   256

	}

   257

   258

	int output_length;

   259

	char *output_pointer = NULL;

   260

	char **output;

   261

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

   262

	i = 0;

   263

   264

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

   265

	_network_ip_list[0] = 0;

   266

   267

	if (sock < 0) {

   268

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

   269

		return;

   270

	}

   271

   272

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

   273

	if (output_length < 0) {

   274

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

   275

		return;

   276

	}

   277

   278

	output = &output_pointer;

   279

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

   280

		for (;;) {

   281

			uint32 n, fields, read;

   282

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

   283

			struct in_addr inaddr;

   284

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

   285

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

   286

			read += 1;

   287

			if (fields != 9) {

   288

				break;

   289

			}

   290

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

   291

			if (inaddr.s_addr != 0) {

   292

				_network_ip_list[i] = inaddr.s_addr;

   293

				i++;

   294

			}

   295

			if (read < 0) {

   296

				break;

   297

			}

   298

			*output += read;

   299

		}

   300

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

   301

		/*free(output_pointer);*/

   302

		/*free(output);*/

   303

		closesocket(sock);

   304

	}

   305

#elif defined(HAVE_GETIFADDRS)

   306

	struct ifaddrs *ifap, *ifa;

   307

   308

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

   309

	_network_ip_list[0] = 0;

   310

   311

	if (getifaddrs(&ifap) != 0)

   312

		return;

   313

   314

	i = 0;

   315

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

   316

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

   317

			continue;

   318

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

   319

		i++;

   320

	}

   321

	freeifaddrs(ifap);

   322

   323

#else /* not HAVE_GETIFADDRS */

   324

   325

	unsigned long len = 0;

   326

	SOCKET sock;

   327

	IFREQ ifo[MAX_INTERFACES];

   328

   329

#ifndef WIN32

   330

	struct ifconf if_conf;

   331

#endif

   332

   333

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

   334

	_network_ip_list[0] = 0;

   335

   336

	sock = socket(AF_INET, SOCK_DGRAM, 0);

   337

	if (sock == INVALID_SOCKET) return;

   338

   339

#ifdef WIN32

   340

	// On windows it is easy

   341

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

   342

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

   343

		closesocket(sock);

   344

		return;

   345

	}

   346

#else

   347

	// On linux a bit harder

   348

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

   349

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

   350

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

   351

		closesocket(sock);

   352

		return;

   353

	}

   354

	len = if_conf.ifc_len;

   355

#endif /* WIN32 */

   356

   357

	// Now walk through all IPs and list them

   358

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

   359

		// Request IP for this interface

   360

#ifdef WIN32

   361

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

   362

#else

   363

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

   364

			closesocket(sock);

   365

			return;

   366

		}

   367

   368

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

   369

#endif

   370

	}

   371

   372

	closesocket(sock);

   373

   374

#endif /* not HAVE_GETIFADDRS */

   375

   376

	_network_ip_list[i] = 0;

   377

	last = i - 1;

   378

   379

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

   380

	// Now display to the debug all the detected ips

   381

	i = 0;

   382

	while (_network_ip_list[i] != 0) {

   383

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

   384

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

   385

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

   386

			if (last > i)

   387

				_network_ip_list[i] = _network_ip_list[last];

   388

			// Clear the last ip

   389

			_network_ip_list[last] = 0;

   390

			// And we have 1 ip less

   391

			last--;

   392

			continue;

   393

		}

   394

   395

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

   396

		i++;

   397

	}

   398

}

   399

   400

// Resolve a hostname to a inet_addr

   401

unsigned long NetworkResolveHost(const char *hostname)

   402

{

   403

	in_addr_t ip;

   404

   405

	// First try: is it an ip address?

   406

	ip = inet_addr(hostname);

   407

   408

	// If not try to resolve the name

   409

	if (ip == INADDR_NONE) {

   410

		struct hostent *he = gethostbyname(hostname);

   411

		if (he == NULL) {

   412

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

   413

		} else {

   414

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

   415

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

   416

			ip = addr.s_addr;

   417

		}

   418

	}

   419

	return ip;

   420

}

   421

   422

// Converts a string to ip/port/player

   423

//  Format: IP#player:port

   424

//

   425

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

   426

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

   427

// occupied by connection_string.

   428

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

   429

{

   430

	char *p;

   431

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

   432

		if (*p == '#') {

   433

			*player = p + 1;

   434

			*p = '\0';

   435

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

   436

			*port = p + 1;

   437

			*p = '\0';

   438

		}

   439

	}

   440

}

   441

   442

// Creates a new client from a socket

   443

//   Used both by the server and the client

   444

static NetworkClientState *NetworkAllocClient(SOCKET s)

   445

{

   446

	NetworkClientState *cs;

   447

	NetworkClientInfo *ci;

   448

	byte client_no;

   449

   450

	client_no = 0;

   451

   452

	if (_network_server) {

   453

		// Can we handle a new client?

   454

		if (_network_clients_connected >= MAX_CLIENTS)

   455

			return NULL;

   456

   457

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   458

			return NULL;

   459

   460

		// Register the login

   461

		client_no = _network_clients_connected++;

   462

	}

   463

   464

	cs = &_clients[client_no];

   465

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

   466

	cs->socket = s;

   467

	cs->last_frame = 0;

   468

	cs->quited = false;

   469

   470

	cs->last_frame = _frame_counter;

   471

	cs->last_frame_server = _frame_counter;

   472

   473

	if (_network_server) {

   474

		ci = DEREF_CLIENT_INFO(cs);

   475

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

   476

   477

		cs->index = _network_client_index++;

   478

		ci->client_index = cs->index;

   479

		ci->join_date = _date;

   480

   481

		InvalidateWindow(WC_CLIENT_LIST, 0);

   482

	}

   483

   484

	return cs;

   485

}

   486

   487

// Close a connection

   488

void NetworkCloseClient(NetworkClientState *cs)

   489

{

   490

	NetworkClientInfo *ci;

   491

	// Socket is already dead