1

#include "stdafx.h"

     2

#include "network_data.h"

     3

     4

#ifdef ENABLE_NETWORK

     5

     6

#include "table/strings.h"

     7

#include "network_client.h"

     8

#include "network_server.h"

     9

#include "network_udp.h"

    10

#include "network_gamelist.h"

    11

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

    12

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

    13

    14

// The listen socket for the server

    15

static SOCKET _listensocket;

    16

    17

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

    18

//  after he joined a server

    19

static Patches network_tmp_patches;

    20

    21

// The amount of clients connected

    22

static byte _network_clients_connected = 0;

    23

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

    24

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

    25

    26

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

    27

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

    28

{

    29

	NetworkClientInfo *ci;

    30

    31

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

    32

		if (ci->client_index == client_index)

    33

			return ci;

    34

    35

	return NULL;

    36

}

    37

    38

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

    39

ClientState *NetworkFindClientStateFromIndex(uint16 client_index)

    40

{

    41

	ClientState *cs;

    42

    43

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

    44

		if (cs->index == client_index)

    45

			return cs;

    46

    47

	return NULL;

    48

}

    49

    50

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

    51

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

    52

void NetworkGetClientName(char *client_name, size_t size, ClientState *cs)

    53

{

    54

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

    55

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

    56

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

    57

	else

    58

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

    59

}

    60

    61

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

    62

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

    63

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

    64

{

    65

	char buf[1024];

    66

	va_list va;

    67

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

    68

    69

	va_start(va, str);

    70

	vsprintf(buf, str, va);

    71

	va_end(va);

    72

    73

	switch (action) {

    74

		case NETWORK_ACTION_JOIN_LEAVE:

    75

			IConsolePrintF(color, "*** %s %s", name, buf);

    76

			AddTextMessage(color, duration, "*** %s %s", name, buf);

    77

			break;

    78

		case NETWORK_ACTION_GIVE_MONEY:

    79

			IConsolePrintF(color, "*** %s %s", name, buf);

    80

			AddTextMessage(color, duration, "*** %s %s", name, buf);

    81

			break;

    82

		case NETWORK_ACTION_CHAT_PLAYER:

    83

			IConsolePrintF(color, "[Team] %s: %s", name, buf);

    84

			AddTextMessage(color, duration, "[Team] %s: %s", name, buf);

    85

			break;

    86

		case NETWORK_ACTION_CHAT_CLIENT:

    87

			IConsolePrintF(color, "[Private] %s: %s", name, buf);

    88

			AddTextMessage(color, duration, "[Private] %s: %s", name, buf);

    89

			break;

    90

		case NETWORK_ACTION_CHAT_TO_CLIENT:

    91

			IConsolePrintF(color, "[Private] To %s: %s", name, buf);

    92

			AddTextMessage(color, duration, "[Private] To %s: %s", name, buf);

    93

			break;

    94

		case NETWORK_ACTION_CHAT_TO_PLAYER:

    95

			IConsolePrintF(color, "[Team] To %s: %s", name, buf);

    96

			AddTextMessage(color, duration, "[Team] To %s: %s", name, buf);

    97

			break;

    98

		case NETWORK_ACTION_NAME_CHANGE:

    99

			IConsolePrintF(color, "*** %s changed his name to %s", name, buf);

   100

			AddTextMessage(color, duration, "*** %s changed his name to %s", name, buf);

   101

			break;

   102

		default:

   103

			IConsolePrintF(color, "[All] %s: %s", name, buf);

   104

			AddTextMessage(color, duration, "[All] %s: %s", name, buf);

   105

			break;

   106

	}

   107

}

   108

   109

// Calculate the frame-lag of a client

   110

uint NetworkCalculateLag(const ClientState *cs)

   111

{

   112

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

   113

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

   114

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

   115

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

   116

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

   117

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

   118

   119

	return lag;

   120

}

   121

   122

   123

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

   124

//  error

   125

void NetworkError(StringID error_string)

   126

{

   127

	_switch_mode = SM_MENU;

   128

	_switch_mode_errorstr = error_string;

   129

}

   130

   131

void ClientStartError(char *error) {

   132

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

   133

	NetworkError(STR_NETWORK_ERR_CLIENT_START);

   134

}

   135

   136

void ServerStartError(char *error) {

   137

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

   138

	NetworkError(STR_NETWORK_ERR_SERVER_START);

   139

}

   140

   141

void NetworkClientError(byte res, ClientState *cs) {

   142

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

   143

	//  disconnection (and why!)

   144

	NetworkErrorCode errorno;

   145

   146

	// We just want to close the connection..

   147

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

   148

		cs->quited = true;

   149

		CloseClient(cs);

   150

		_networking = false;

   151

   152

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

   153

		return;

   154

	}

   155

   156

	switch(res) {

   157

		case NETWORK_RECV_STATUS_DESYNC: errorno = NETWORK_ERROR_DESYNC; break;

   158

		case NETWORK_RECV_STATUS_SAVEGAME: errorno = NETWORK_ERROR_SAVEGAME_FAILED; break;

   159

		default: errorno = NETWORK_ERROR_GENERAL;

   160

	}

   161

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

   162

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

   163

		SEND_COMMAND(PACKET_CLIENT_ERROR)(errorno);

   164

   165

		// Dequeue all commands before closing the socket

   166

		NetworkSend_Packets(DEREF_CLIENT(0));

   167

	}

   168

   169

	_switch_mode = SM_MENU;

   170

	CloseClient(cs);

   171

	_networking = false;

   172

}

   173

   174

// Find all IP-aliases for this host

   175

void NetworkFindIPs(void)

   176

{

   177

	int i, last;

   178

   179

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

   180

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

   181

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

   182

   183

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

   184

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

   185

		if (new_pos == 0) {

   186

			return B_ERROR;

   187

		}

   188

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

   189

		return B_OK;

   190

	}

   191

   192

	int output_length;

   193

	char *output_pointer = NULL;

   194

	char **output;

   195

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

   196

	i = 0;

   197

   198

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

   199

	_network_ip_list[0] = 0;

   200

   201

	if (sock < 0) {

   202

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

   203

		return;

   204

	}

   205

   206

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

   207

	if (output_length < 0) {

   208

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

   209

		return;

   210

	}

   211

   212

	output = &output_pointer;

   213

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

   214

		for (;;) {

   215

			uint32 n, fields, read;

   216

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

   217

			struct in_addr inaddr;

   218

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

   219

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

   220

			read += 1;

   221

			if (fields != 9) {

   222

				break;

   223

			}

   224

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

   225

			if (inaddr.s_addr != 0) {

   226

				_network_ip_list[i] = inaddr.s_addr;

   227

				i++;

   228

			}

   229

			if (read < 0) {

   230

				break;

   231

			}

   232

			*output += read;

   233

		}

   234

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

   235

		/*free(output_pointer);*/

   236

		/*free(output);*/

   237

		closesocket(sock);

   238

	}

   239

#elif defined(HAVE_GETIFADDRS)

   240

	struct ifaddrs *ifap, *ifa;

   241

   242

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

   243

	_network_ip_list[0] = 0;

   244

   245

	if (getifaddrs(&ifap) != 0)

   246

		return;

   247

   248

	i = 0;

   249

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

   250

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

   251

			continue;

   252

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

   253

		i++;

   254

	}

   255

	freeifaddrs(ifap);

   256

   257

#else /* not HAVE_GETIFADDRS */

   258

   259

	unsigned long len = 0;

   260

	SOCKET sock;

   261

	IFREQ ifo[MAX_INTERFACES];

   262

   263

#ifndef WIN32

   264

	struct ifconf if_conf;

   265

#endif

   266

   267

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

   268

	_network_ip_list[0] = 0;

   269

   270

	if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {

   271

		return;

   272

	}

   273

   274

#ifdef WIN32

   275

	// On windows it is easy

   276

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

   277

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

   278

		closesocket(sock);

   279

		return;

   280

	}

   281

#else

   282

	// On linux a bit harder

   283

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

   284

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

   285

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

   286

		closesocket(sock);

   287

		return;

   288

	}

   289

	len = if_conf.ifc_len;

   290

#endif /* WIN32 */

   291

   292

	// Now walk through all IPs and list them

   293

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

   294

		// Request IP for this interface

   295

#ifdef WIN32

   296

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

   297

#else

   298

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

   299

			closesocket(sock);

   300

			return;

   301

		}

   302

   303

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

   304

#endif

   305

	}

   306

   307

	closesocket(sock);

   308

   309

#endif /* not HAVE_GETIFADDRS */

   310

   311

	_network_ip_list[i] = 0;

   312

	last = i - 1;

   313

   314

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

   315

	// Now display to the debug all the detected ips

   316

	i = 0;

   317

	while (_network_ip_list[i] != 0) {

   318

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

   319

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

   320

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

   321

			if (last > i)

   322

				_network_ip_list[i] = _network_ip_list[last];

   323

			// Clear the last ip

   324

			_network_ip_list[last] = 0;

   325

			// And we have 1 ip less

   326

			last--;

   327

			continue;

   328

		}

   329

   330

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

   331

		i++;

   332

	}

   333

}

   334

   335

// Resolve a hostname to a inet_addr

   336

unsigned long NetworkResolveHost(const char *hostname)

   337

{

   338

	in_addr_t ip;

   339

   340

	// First try: is it an ip address?

   341

	ip = inet_addr(hostname);

   342

   343

	// If not try to resolve the name

   344

	if (ip == INADDR_NONE) {

   345

		struct hostent *he = gethostbyname(hostname);

   346

		if (he == NULL) {

   347

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

   348

		} else {

   349

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

   350

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

   351

			ip = addr.s_addr;

   352

		}

   353

	}

   354

	return ip;

   355

}

   356

   357

// Converts a string to ip/port/player

   358

//  Format: IP#player:port

   359

//

   360

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

   361

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

   362

// occupied by connection_string.

   363

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

   364

{

   365

	byte *p;

   366

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

   367

		if (*p == '#') {

   368

			*player = p + 1;

   369

			*p = '\0';

   370

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

   371

			*port = p + 1;

   372

			*p = '\0';

   373

		}

   374

	}

   375

}

   376

   377

// Creates a new client from a socket

   378

//   Used both by the server and the client

   379

static ClientState *AllocClient(SOCKET s)

   380

{

   381

	ClientState *cs;

   382

	NetworkClientInfo *ci;

   383

	byte client_no;

   384

   385

	client_no = 0;

   386

   387

	if (_network_server) {

   388

		// Can we handle a new client?

   389

		if (_network_clients_connected >= MAX_CLIENTS)

   390

			return NULL;

   391

   392

		if (_network_game_info.clients_on >= _network_game_info.clients_max)

   393

			return NULL;

   394

   395

		// Register the login

   396

		client_no = _network_clients_connected++;

   397

	}

   398

   399

	cs = &_clients[client_no];

   400

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

   401

	cs->socket = s;

   402

	cs->last_frame = 0;

   403

	cs->quited = false;

   404

   405

	if (_network_server) {

   406

		ci = &_network_client_info[client_no];

   407

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

   408

   409

		cs->index = _network_client_index++;

   410

		ci->client_index = cs->index;

   411

		ci->join_date = _date;

   412

   413

		InvalidateWindow(WC_CLIENT_LIST, 0);

   414

	}

   415

   416

	return cs;

   417

}

   418

   419

// Close a connection

   420

void CloseClient(ClientState *cs)

   421

{

   422

	NetworkClientInfo *ci;

   423

	// Socket is already dead

   424

	if (cs->socket == INVALID_SOCKET) return;

   425

   426

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

   427

   428

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

   429

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

   430

		NetworkErrorCode errorno = NETWORK_ERROR_CONNECTION_LOST;

   431

		char str1[100], str2[100];

   432

		char client_name[NETWORK_NAME_LENGTH];

   433

		ClientState *new_cs;

   434

   435

		NetworkGetClientName(client_name, sizeof(client_name), cs);

   436

   437

		GetString(str1, STR_NETWORK_ERR_LEFT);

   438

		GetString(str2, STR_NETWORK_ERR_CLIENT_GENERAL + errorno);

   439

   440

		NetworkTextMessage(NETWORK_ACTION_JOIN_LEAVE, 1, client_name, "%s (%s)", str1, str2);

   441

   442

		// Inform other clients of this... strange leaving ;)

   443

		FOR_ALL_CLIENTS(new_cs) {

   444

			if (new_cs->status > STATUS_AUTH && cs != new_cs) {

   445

				SEND_COMMAND(PACKET_SERVER_ERROR_QUIT)(new_cs, cs->index, errorno);

   446

			}

   447

		}

   448

	}

   449

   450

	closesocket(cs->socket);

   451

	cs->writable = false;

   452

   453

	// Free all pending and partially received packets

   454

	while (cs->packet_queue != NULL) {

   455

		Packet *p = cs->packet_queue->next;

   456

		free(cs->packet_queue);

   457

		cs->packet_queue = p;

   458

	}

   459

	free(cs->packet_recv);

   460

	cs->packet_recv = NULL;

   461

   462

	while (cs->command_queue != NULL) {

   463

		CommandPacket *p = cs->command_queue->next;

   464

		free(cs->command_queue);

   465

		cs->command_queue = p;

   466

	}

   467

   468

	// Close the gap in the client-list

   469

	ci = DEREF_CLIENT_INFO(cs);

   470

   471

	if (_network_server) {

   472

		// We just lost one client :(

   473

		if (cs->status > STATUS_INACTIVE)

   474

			_network_game_info.clients_on--;

   475

		_network_clients_connected--;

   476

   477

		while ((cs + 1) != DEREF_CLIENT(MAX_CLIENTS) && (cs + 1)->socket != INVALID_SOCKET) {

   478

			*cs = *(cs + 1);

   479

			*ci = *(ci + 1);

   480

			cs++;

   481

			ci++;

   482

		}

   483

   484

		InvalidateWindow(WC_CLIENT_LIST, 0);

   485

	}

   486

   487

	// Reset the status of the last socket

   488

	cs->socket = INVALID_SOCKET;

   489

	cs->status = STATUS_INACTIVE;

   490

	cs->index = NETWORK_EMPTY_INDEX;

   491

	ci->client_index = NETWORK_EMPTY_INDEX;

   492

}

   493

   494

extern void ShowJoinStatusWindow();