0
|
1 |
#include "stdafx.h"
|
|
2 |
#include "ttd.h"
|
|
3 |
#include "command.h"
|
|
4 |
#include "player.h"
|
|
5 |
|
|
6 |
#if defined(WIN32)
|
|
7 |
# include <windows.h>
|
|
8 |
# include <winsock.h>
|
|
9 |
|
|
10 |
# pragma comment (lib, "ws2_32.lib")
|
|
11 |
# define ENABLE_NETWORK
|
|
12 |
# define GET_LAST_ERROR() WSAGetLastError()
|
|
13 |
# define EWOULDBLOCK WSAEWOULDBLOCK
|
|
14 |
#endif
|
|
15 |
|
|
16 |
#if defined(UNIX)
|
|
17 |
// Make compatible with WIN32 names
|
|
18 |
# define SOCKET int
|
|
19 |
# define INVALID_SOCKET -1
|
|
20 |
// we need different defines for MorphOS and AmigaOS
|
|
21 |
#if !defined(__MORPHOS__) && !defined(__AMIGA__)
|
|
22 |
# define ioctlsocket ioctl
|
|
23 |
# define closesocket close
|
|
24 |
# define GET_LAST_ERROR() errno
|
|
25 |
#endif
|
|
26 |
// Need this for FIONREAD on solaris
|
|
27 |
# define BSD_COMP
|
|
28 |
# include <unistd.h>
|
|
29 |
# include <sys/ioctl.h>
|
|
30 |
|
|
31 |
// Socket stuff
|
|
32 |
# include <sys/socket.h>
|
|
33 |
# include <netinet/in.h>
|
|
34 |
# include <arpa/inet.h>
|
|
35 |
# include <errno.h>
|
|
36 |
# include <sys/time.h>
|
|
37 |
// NetDB
|
|
38 |
# include <netdb.h>
|
|
39 |
|
|
40 |
# ifndef TCP_NODELAY
|
|
41 |
# define TCP_NODELAY 0x0001
|
|
42 |
# endif
|
|
43 |
|
|
44 |
#endif
|
|
45 |
|
|
46 |
|
|
47 |
#if defined(__MORPHOS__) || defined(__AMIGA__)
|
|
48 |
# include <exec/types.h>
|
|
49 |
# include <proto/exec.h> // required for Open/CloseLibrary()
|
|
50 |
# if defined(__MORPHOS__)
|
|
51 |
# include <sys/filio.h> // FION#? defines
|
|
52 |
# else // __AMIGA__
|
|
53 |
# include <proto/socket.h>
|
|
54 |
# endif
|
|
55 |
|
|
56 |
// make source compatible with bsdsocket.library functions
|
|
57 |
# define closesocket(s) CloseSocket(s)
|
|
58 |
# define GET_LAST_ERROR() Errno()
|
|
59 |
# define ioctlsocket(s,request,status) IoctlSocket((LONG)s,(ULONG)request,(char*)status)
|
|
60 |
|
|
61 |
struct Library *SocketBase = NULL;
|
|
62 |
#endif /* __MORPHOS__ || __AMIGA__ */
|
|
63 |
|
|
64 |
|
|
65 |
#define SEND_MTU 1460
|
|
66 |
|
|
67 |
#if defined(ENABLE_NETWORK)
|
|
68 |
|
|
69 |
// sent from client -> server whenever the client wants to exec a command.
|
|
70 |
// send from server -> client when another player execs a command.
|
|
71 |
typedef struct CommandPacket {
|
|
72 |
byte packet_length;
|
|
73 |
byte packet_type;
|
|
74 |
uint16 cmd;
|
|
75 |
uint32 p1,p2;
|
|
76 |
TileIndex tile;
|
|
77 |
byte player;// player id, this is checked by the server.
|
|
78 |
byte when; // offset from the current max_frame value minus 1. this is set by the server.
|
|
79 |
uint32 dp[8];
|
|
80 |
} CommandPacket;
|
|
81 |
|
|
82 |
assert_compile(sizeof(CommandPacket) == 16 + 32);
|
|
83 |
|
|
84 |
#define COMMAND_PACKET_BASE_SIZE (sizeof(CommandPacket) - 8 * sizeof(uint32))
|
|
85 |
|
|
86 |
// sent from server -> client periodically to tell the client about the current tick in the server
|
|
87 |
// and how far the client may progress.
|
|
88 |
typedef struct SyncPacket {
|
|
89 |
byte packet_length;
|
|
90 |
byte packet_type;
|
|
91 |
byte frames; // how many more frames may the client execute? this is relative to the old value of max.
|
|
92 |
byte server; // where is the server currently executing? this is negatively relative to the old value of max.
|
|
93 |
uint32 random_seed_1; // current random state at server. used to detect out of sync.
|
|
94 |
uint32 random_seed_2;
|
|
95 |
} SyncPacket;
|
|
96 |
|
|
97 |
assert_compile(sizeof(SyncPacket) == 12);
|
|
98 |
|
|
99 |
// sent from server -> client as an acknowledgement that the server received the command.
|
|
100 |
// the command will be executed at the current value of "max".
|
|
101 |
typedef struct AckPacket {
|
|
102 |
byte packet_length;
|
|
103 |
byte packet_type;
|
|
104 |
} AckPacket;
|
|
105 |
|
|
106 |
typedef struct FilePacketHdr {
|
|
107 |
byte packet_length;
|
|
108 |
byte packet_type;
|
|
109 |
byte unused[2];
|
|
110 |
} FilePacketHdr;
|
|
111 |
|
|
112 |
assert_compile(sizeof(FilePacketHdr) == 4);
|
|
113 |
|
|
114 |
// sent from server to client when the client has joined.
|
|
115 |
typedef struct WelcomePacket {
|
|
116 |
byte packet_length;
|
|
117 |
byte packet_type;
|
|
118 |
byte unused[2];
|
|
119 |
} WelcomePacket;
|
|
120 |
|
|
121 |
typedef struct Packet Packet;
|
|
122 |
struct Packet {
|
|
123 |
Packet *next; // this one has to be the first element.
|
|
124 |
uint siz;
|
|
125 |
byte buf[SEND_MTU]; // packet payload
|
|
126 |
};
|
|
127 |
|
|
128 |
typedef struct ClientState {
|
|
129 |
int socket;
|
|
130 |
bool inactive; // disable sending of commands/syncs to client
|
|
131 |
bool writable;
|
|
132 |
uint xmitpos;
|
|
133 |
|
|
134 |
uint eaten;
|
|
135 |
Packet *head, **last;
|
|
136 |
|
|
137 |
uint buflen; // receive buffer len
|
|
138 |
byte buf[256]; // receive buffer
|
|
139 |
} ClientState;
|
|
140 |
|
|
141 |
|
|
142 |
static uint _not_packet;
|
|
143 |
|
|
144 |
typedef struct QueuedCommand QueuedCommand;
|
|
145 |
struct QueuedCommand {
|
|
146 |
QueuedCommand *next;
|
|
147 |
CommandPacket cp;
|
|
148 |
CommandCallback *callback;
|
|
149 |
uint32 cmd;
|
|
150 |
int32 frame;
|
|
151 |
};
|
|
152 |
|
|
153 |
typedef struct CommandQueue CommandQueue;
|
|
154 |
struct CommandQueue {
|
|
155 |
QueuedCommand *head, **last;
|
|
156 |
};
|
|
157 |
|
|
158 |
#define MAX_CLIENTS (MAX_PLAYERS + 1)
|
|
159 |
|
|
160 |
// packets waiting to be executed, for each of the players.
|
|
161 |
// this list is sorted in frame order, so the item on the front will be executed first.
|
|
162 |
static CommandQueue _command_queue;
|
|
163 |
|
|
164 |
// in the client, this is the list of commands that have not yet been acked.
|
|
165 |
// when it is acked, it will be moved to the appropriate position at the end of the player queue.
|
|
166 |
static CommandQueue _ack_queue;
|
|
167 |
|
|
168 |
static ClientState _clients[MAX_CLIENTS];
|
|
169 |
static int _num_clients;
|
|
170 |
|
|
171 |
// keep a history of the 16 most recent seeds to be able to capture out of sync errors.
|
|
172 |
static uint32 _my_seed_list[16][2];
|
|
173 |
|
|
174 |
typedef struct FutureSeeds {
|
|
175 |
int32 frame;
|
|
176 |
uint32 seed[2];
|
|
177 |
} FutureSeeds;
|
|
178 |
|
|
179 |
// remember some future seeds that the server sent to us.
|
|
180 |
static FutureSeeds _future_seed[8];
|
|
181 |
static int _num_future_seed;
|
|
182 |
|
|
183 |
static SOCKET _listensocket;
|
|
184 |
static SOCKET _udpsocket;
|
|
185 |
|
|
186 |
|
|
187 |
typedef struct UDPPacket {
|
|
188 |
byte command_code;
|
|
189 |
byte data_len;
|
|
190 |
byte command_check;
|
|
191 |
byte data[255];
|
|
192 |
} UDPPacket;
|
|
193 |
|
|
194 |
enum {
|
|
195 |
NET_UDPCMD_SERVERSEARCH = 1,
|
|
196 |
NET_UDPCMD_SERVERACTIVE,
|
|
197 |
};
|
|
198 |
|
|
199 |
uint32 _network_ip_list[10]; // Network ips
|
|
200 |
char * _network_detected_serverip = "255.255.255.255"; // UDP Broadcast detected server-ip
|
|
201 |
uint32 _network_detected_serverport = 0; // UDP Broadcast detected server-port
|
|
202 |
|
|
203 |
void NetworkUDPSend(struct sockaddr_in recv,struct UDPPacket packet);
|
|
204 |
|
|
205 |
static bool _network_synced;
|
|
206 |
|
|
207 |
// this is set to point to the savegame
|
|
208 |
static byte *_transmit_file;
|
|
209 |
static size_t _transmit_file_size;
|
|
210 |
|
|
211 |
static FILE *_recv_file;
|
|
212 |
|
|
213 |
//////////////////////////////////////////////////////////////////////
|
|
214 |
|
|
215 |
static QueuedCommand *AllocQueuedCommand(CommandQueue *nq)
|
|
216 |
{
|
|
217 |
QueuedCommand *qp = (QueuedCommand*)calloc(sizeof(QueuedCommand), 1);
|
|
218 |
assert(qp);
|
|
219 |
*nq->last = qp;
|
|
220 |
nq->last = &qp->next;
|
|
221 |
return qp;
|
|
222 |
}
|
|
223 |
|
|
224 |
// go through the player queues for each player and see if there are any pending commands
|
|
225 |
// that should be executed this frame. if there are, execute them.
|
|
226 |
void NetworkProcessCommands()
|
|
227 |
{
|
|
228 |
CommandQueue *nq;
|
|
229 |
QueuedCommand *qp;
|
|
230 |
|
|
231 |
// queue mode ?
|
|
232 |
if (_networking_queuing)
|
|
233 |
return;
|
|
234 |
|
|
235 |
nq = &_command_queue;
|
|
236 |
while ( (qp=nq->head) && (!_networking_sync || qp->frame <= _frame_counter)) {
|
|
237 |
// unlink it.
|
|
238 |
if (!(nq->head = qp->next)) nq->last = &nq->head;
|
|
239 |
|
|
240 |
if (qp->frame < _frame_counter && _networking_sync) {
|
|
241 |
error("!qp->cp.frame < _frame_counter, %d < %d\n", qp->frame, _frame_counter);
|
|
242 |
}
|
|
243 |
|
|
244 |
// run the command
|
|
245 |
_current_player = qp->cp.player;
|
|
246 |
memcpy(_decode_parameters, qp->cp.dp, (qp->cp.packet_length - COMMAND_PACKET_BASE_SIZE));
|
|
247 |
DoCommandP(qp->cp.tile, qp->cp.p1, qp->cp.p2, qp->callback, qp->cmd | CMD_DONT_NETWORK);
|
|
248 |
free(qp);
|
|
249 |
}
|
|
250 |
|
|
251 |
if (!_networking_server) {
|
|
252 |
// remember the random seed so we can check if we're out of sync.
|
|
253 |
_my_seed_list[_frame_counter & 15][0] = _sync_seed_1;
|
|
254 |
_my_seed_list[_frame_counter & 15][1] = _sync_seed_2;
|
|
255 |
|
|
256 |
while (_num_future_seed) {
|
|
257 |
assert(_future_seed[0].frame >= _frame_counter);
|
|
258 |
if (_future_seed[0].frame != _frame_counter) break;
|
|
259 |
if (_future_seed[0].seed[0] != _sync_seed_1 ||_future_seed[0].seed[1] != _sync_seed_2)
|
|
260 |
error("!network sync error");
|
|
261 |
memcpy_overlapping(_future_seed, _future_seed + 1, --_num_future_seed * sizeof(FutureSeeds));
|
|
262 |
}
|
|
263 |
}
|
|
264 |
}
|
|
265 |
|
|
266 |
// send a packet to a client
|
|
267 |
static void SendBytes(ClientState *cs, void *bytes, uint len)
|
|
268 |
{
|
|
269 |
byte *b = (byte*)bytes;
|
|
270 |
uint n;
|
|
271 |
Packet *p;
|
|
272 |
|
|
273 |
assert(len != 0);
|
|
274 |
|
|
275 |
// see if there's space in the last packet?
|
|
276 |
if (!cs->head || (p = (Packet*)cs->last, p->siz == sizeof(p->buf)))
|
|
277 |
p = NULL;
|
|
278 |
|
|
279 |
do {
|
|
280 |
if (!p) {
|
|
281 |
// need to allocate a new packet buffer.
|
|
282 |
p = (Packet*)malloc(sizeof(Packet));
|
|
283 |
|
|
284 |
// insert at the end of the linked list.
|
|
285 |
*cs->last = p;
|
|
286 |
cs->last = &p->next;
|
|
287 |
p->next = NULL;
|
|
288 |
p->siz = 0;
|
|
289 |
}
|
|
290 |
|
|
291 |
// copy bytes to packet.
|
|
292 |
n = minu(sizeof(p->buf) - p->siz, len);
|
|
293 |
memcpy(p->buf + p->siz, b, n);
|
|
294 |
p->siz += n;
|
|
295 |
b += n;
|
|
296 |
p = NULL;
|
|
297 |
} while (len -= n);
|
|
298 |
}
|
|
299 |
|
|
300 |
// client:
|
|
301 |
// add it to the client's ack queue, and send the command to the server
|
|
302 |
// server:
|
|
303 |
// add it to the server's player queue, and send it to all clients.
|
|
304 |
void NetworkSendCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback)
|
|
305 |
{
|
|
306 |
int nump;
|
|
307 |
QueuedCommand *qp;
|
|
308 |
ClientState *cs;
|
|
309 |
|
|
310 |
qp = AllocQueuedCommand(_networking_server ? &_command_queue : &_ack_queue);
|
|
311 |
qp->cp.packet_type = 0;
|
|
312 |
qp->cp.tile = tile;
|
|
313 |
qp->cp.p1 = p1;
|
|
314 |
qp->cp.p2 = p2;
|
|
315 |
qp->cp.cmd = (uint16)cmd;
|
|
316 |
qp->cp.player = _local_player;
|
|
317 |
qp->cp.when = 0;
|
|
318 |
qp->cmd = cmd;
|
|
319 |
qp->callback = callback;
|
|
320 |
|
|
321 |
// so the server knows when to execute it.
|
|
322 |
qp->frame = _frame_counter_max;
|
|
323 |
|
|
324 |
// calculate the amount of extra bytes.
|
|
325 |
nump = 8;
|
|
326 |
while ( nump != 0 && ((uint32*)_decode_parameters)[nump-1] == 0) nump--;
|
|
327 |
qp->cp.packet_length = COMMAND_PACKET_BASE_SIZE + nump * sizeof(uint32);
|
|
328 |
if (nump != 0) memcpy(qp->cp.dp, _decode_parameters, nump * sizeof(uint32));
|
|
329 |
|
|
330 |
#if defined(TTD_BIG_ENDIAN)
|
|
331 |
// need to convert the command to little endian before sending it.
|
|
332 |
{
|
|
333 |
CommandPacket cp;
|
|
334 |
cp = qp->cp;
|
|
335 |
cp.cmd = TO_LE16(cp.cmd);
|
|
336 |
cp.tile = TO_LE16(cp.tile);
|
|
337 |
cp.p1 = TO_LE32(cp.p1);
|
|
338 |
cp.p2 = TO_LE32(cp.p2);
|
|
339 |
for(cs=_clients; cs->socket != INVALID_SOCKET; cs++) if (!cs->inactive) SendBytes(cs, &cp, cp.packet_length);
|
|
340 |
}
|
|
341 |
#else
|
|
342 |
// send it to the peers
|
|
343 |
for(cs=_clients; cs->socket != INVALID_SOCKET; cs++) if (!cs->inactive) SendBytes(cs, &qp->cp, qp->cp.packet_length);
|
|
344 |
|
|
345 |
#endif
|
|
346 |
}
|
|
347 |
|
|
348 |
// client:
|
|
349 |
// server sends a command from another player that we should execute.
|
|
350 |
// put it in the command queue.
|
|
351 |
//
|
|
352 |
// server:
|
|
353 |
// client sends a command that it wants to execute.
|
|
354 |
// fill the when field so the client knows when to execute it.
|
|
355 |
// put it in the appropriate player queue.
|
|
356 |
// send it to all other clients.
|
|
357 |
// send an ack packet to the actual client.
|
|
358 |
|
|
359 |
static void HandleCommandPacket(ClientState *cs, CommandPacket *np)
|
|
360 |
{
|
|
361 |
QueuedCommand *qp;
|
|
362 |
ClientState *c;
|
|
363 |
AckPacket ap;
|
|
364 |
|
|
365 |
printf("net: cmd size %d\n", np->packet_length);
|
|
366 |
|
|
367 |
assert(np->packet_length >= COMMAND_PACKET_BASE_SIZE);
|
|
368 |
|
|
369 |
// put it into the command queue
|
|
370 |
qp = AllocQueuedCommand(&_command_queue);
|
|
371 |
qp->cp = *np;
|
|
372 |
|
|
373 |
qp->frame = _frame_counter_max;
|
|
374 |
|
|
375 |
qp->callback = NULL;
|
|
376 |
|
|
377 |
// extra params
|
|
378 |
memcpy(&qp->cp.dp, np->dp, np->packet_length - COMMAND_PACKET_BASE_SIZE);
|
|
379 |
|
|
380 |
ap.packet_type = 2;
|
|
381 |
ap.packet_length = 2;
|
|
382 |
|
|
383 |
// send it to the peers
|
|
384 |
if (_networking_server) {
|
|
385 |
for(c=_clients; c->socket != INVALID_SOCKET; c++) {
|
|
386 |
if (c == cs) {
|
|
387 |
SendBytes(c, &ap, 2);
|
|
388 |
} else {
|
|
389 |
if (!cs->inactive) SendBytes(c, &qp->cp, qp->cp.packet_length);
|
|
390 |
}
|
|
391 |
}
|
|
392 |
}
|
|
393 |
|
|
394 |
// convert from little endian to big endian?
|
|
395 |
#if defined(TTD_BIG_ENDIAN)
|
|
396 |
qp->cp.cmd = TO_LE16(qp->cp.cmd);
|
|
397 |
qp->cp.tile = TO_LE16(qp->cp.tile);
|
|
398 |
qp->cp.p1 = TO_LE32(qp->cp.p1);
|
|
399 |
qp->cp.p2 = TO_LE32(qp->cp.p2);
|
|
400 |
#endif
|
|
401 |
|
|
402 |
qp->cmd = qp->cp.cmd;
|
|
403 |
}
|
|
404 |
|
|
405 |
// sent from server -> client periodically to tell the client about the current tick in the server
|
|
406 |
// and how far the client may progress.
|
|
407 |
static void HandleSyncPacket(SyncPacket *sp)
|
|
408 |
{
|
|
409 |
uint32 s1,s2;
|
|
410 |
|
|
411 |
_frame_counter_srv = _frame_counter_max - sp->server;
|
|
412 |
_frame_counter_max += sp->frames;
|
|
413 |
|
|
414 |
printf("net: sync max=%d cur=%d server=%d\n", _frame_counter_max, _frame_counter, _frame_counter_srv);
|
|
415 |
|
|
416 |
// queueing only?
|
|
417 |
if (_networking_queuing || _frame_counter == 0)
|
|
418 |
return;
|
|
419 |
|
|
420 |
s1 = TO_LE32(sp->random_seed_1);
|
|
421 |
s2 = TO_LE32(sp->random_seed_2);
|
|
422 |
|
|
423 |
if (_frame_counter_srv <= _frame_counter) {
|
|
424 |
// we are ahead of the server check if the seed is in our list.
|
|
425 |
if (_frame_counter_srv + 16 > _frame_counter) {
|
|
426 |
// the random seed exists in our array check it.
|
|
427 |
if (s1 != _my_seed_list[_frame_counter_srv & 0xF][0] || s2 != _my_seed_list[_frame_counter_srv & 0xF][1])
|
|
428 |
error("!network is desynched\n");
|
|
429 |
}
|
|
430 |
} else {
|
|
431 |
// the server's frame has not been executed yet. store the server's seed in a list.
|
|
432 |
if (_num_future_seed < lengthof(_future_seed)) {
|
|
433 |
_future_seed[_num_future_seed].frame = _frame_counter_srv;
|
|
434 |
_future_seed[_num_future_seed].seed[0] = s1;
|
|
435 |
_future_seed[_num_future_seed].seed[1] = s2;
|
|
436 |
_num_future_seed++;
|
|
437 |
}
|
|
438 |
}
|
|
439 |
}
|
|
440 |
|
|
441 |
// sent from server -> client as an acknowledgement that the server received the command.
|
|
442 |
// the command will be executed at the current value of "max".
|
|
443 |
static void HandleAckPacket()
|
|
444 |
{
|
|
445 |
QueuedCommand *q;
|
|
446 |
// move a packet from the ack queue to the end of this player's queue.
|
|
447 |
q = _ack_queue.head;
|
|
448 |
assert(q);
|
|
449 |
if (!(_ack_queue.head = q->next)) _ack_queue.last = &_ack_queue.head;
|
|
450 |
q->next = NULL;
|
|
451 |
q->frame = _frame_counter_max;
|
|
452 |
|
|
453 |
*_command_queue.last = q;
|
|
454 |
_command_queue.last = &q->next;
|
|
455 |
|
|
456 |
printf("net: ack\n");
|
|
457 |
}
|
|
458 |
|
|
459 |
static void HandleFilePacket(FilePacketHdr *fp)
|
|
460 |
{
|
|
461 |
int n = fp->packet_length - sizeof(FilePacketHdr);
|
|
462 |
if (n == 0) {
|
|
463 |
assert(_networking_queuing);
|
|
464 |
assert(!_networking_sync);
|
|
465 |
// eof
|
|
466 |
if (_recv_file) { fclose(_recv_file); _recv_file = NULL; }
|
|
467 |
|
|
468 |
// attempt loading the game.
|
|
469 |
_game_mode = GM_NORMAL;
|
|
470 |
if (SaveOrLoad("networkc.tmp", SL_LOAD) != SL_OK) error("network load failed");
|
|
471 |
|
|
472 |
// sync to server.
|
|
473 |
_networking_queuing = false;
|
|
474 |
|
|
475 |
_networking_sync = true;
|
|
476 |
_frame_counter = 0; // start executing at frame 0.
|
|
477 |
_sync_seed_1 = _sync_seed_2 = 0;
|
|
478 |
_num_future_seed = 0;
|
|
479 |
memset(_my_seed_list, 0, sizeof(_my_seed_list));
|
|
480 |
|
|
481 |
if (_network_playas == 0) {
|
|
482 |
// send a command to make a new player
|
|
483 |
_local_player = 0;
|
|
484 |
NetworkSendCommand(0, 0, 0, CMD_PLAYER_CTRL, NULL);
|
1
|
485 |
_local_player = OWNER_SPECTATOR;
|
0
|
486 |
} else {
|
|
487 |
// take control over an existing company
|
|
488 |
if (DEREF_PLAYER(_network_playas-1)->is_active)
|
|
489 |
_local_player = _network_playas-1;
|
|
490 |
else
|
1
|
491 |
_local_player = OWNER_SPECTATOR;
|
0
|
492 |
}
|
|
493 |
|
|
494 |
} else {
|
|
495 |
if(!_recv_file) {
|
|
496 |
_recv_file = fopen("networkc.tmp", "wb");
|
|
497 |
if (!_recv_file) error("can't open savefile");
|
|
498 |
}
|
|
499 |
fwrite( (char*)fp + sizeof(*fp), n, 1, _recv_file);
|
|
500 |
}
|
|
501 |
}
|
|
502 |
|
|
503 |
static void CloseClient(ClientState *cs)
|
|
504 |
{
|
|
505 |
Packet *p, *next;
|
|
506 |
|
|
507 |
printf("CloseClient\n");
|
|
508 |
|
|
509 |
assert(cs->socket != INVALID_SOCKET);
|
|
510 |
|
|
511 |
closesocket(cs->socket);
|
|
512 |
|
|
513 |
// free buffers
|
|
514 |
for(p = cs->head; p; p=next) {
|
|
515 |
next = p->next;
|
|
516 |
free(p);
|
|
517 |
}
|
|
518 |
|
|
519 |
// copy up structs...
|
|
520 |
while ((cs+1)->socket != INVALID_SOCKET) {
|
|
521 |
*cs = *(cs+1);
|
|
522 |
cs++;
|
|
523 |
}
|
|
524 |
cs->socket = INVALID_SOCKET;
|
|
525 |
|
|
526 |
_num_clients--;
|
|
527 |
}
|
|
528 |
|
|
529 |
#define NETWORK_BUFFER_SIZE 4096
|
|
530 |
static bool ReadPackets(ClientState *cs)
|
|
531 |
{
|
|
532 |
byte network_buffer[NETWORK_BUFFER_SIZE];
|
|
533 |
uint pos,size;
|
|
534 |
unsigned long recv_bytes;
|
|
535 |
|
|
536 |
size = cs->buflen;
|
|
537 |
|
|
538 |
for(;;) {
|
|
539 |
if (size != 0) memcpy(network_buffer, cs->buf, size);
|
|
540 |
|
|
541 |
recv_bytes = recv(cs->socket, (char*)network_buffer + size, sizeof(network_buffer) - size, 0);
|
|
542 |
if ( recv_bytes == (unsigned long)-1) {
|
|
543 |
int err = GET_LAST_ERROR();
|
|
544 |
if (err == EWOULDBLOCK) break;
|
|
545 |
printf("net: recv() failed with error %d\n", err);
|
|
546 |
CloseClient(cs);
|
|
547 |
return false;
|
|
548 |
}
|
|
549 |
// no more bytes for now?
|
|
550 |
if (recv_bytes == 0)
|
|
551 |
break;
|
|
552 |
|
|
553 |
size += recv_bytes; // number of bytes read.
|
|
554 |
pos = 0;
|
|
555 |
while (size >= 2) {
|
|
556 |
byte *packet = network_buffer + pos;
|
|
557 |
// whole packet not there yet?
|
|
558 |
if (size < packet[0]) break;
|
|
559 |
size -= packet[0];
|
|
560 |
pos += packet[0];
|
|
561 |
|
|
562 |
switch(packet[1]) {
|
|
563 |
case 0:
|
|
564 |
HandleCommandPacket(cs, (CommandPacket*)packet);
|
|
565 |
break;
|
|
566 |
case 1:
|
|
567 |
assert(_networking_sync || _networking_queuing);
|
|
568 |
assert(!_networking_server);
|
|
569 |
HandleSyncPacket((SyncPacket*)packet);
|
|
570 |
break;
|
|
571 |
case 2:
|
|
572 |
assert(!_networking_server);
|
|
573 |
HandleAckPacket();
|
|
574 |
break;
|
|
575 |
case 3:
|
|
576 |
HandleFilePacket((FilePacketHdr*)packet);
|
|
577 |
break;
|
|
578 |
default:
|
|
579 |
error("unknown packet type");
|
|
580 |
}
|
|
581 |
}
|
|
582 |
|
|
583 |
assert(size>=0 && size < sizeof(cs->buf));
|
|
584 |
|
|
585 |
memcpy(cs->buf, network_buffer + pos, size);
|
|
586 |
}
|
|
587 |
|
|
588 |
cs->buflen = size;
|
|
589 |
|
|
590 |
return true;
|
|
591 |
}
|
|
592 |
|
|
593 |
|
|
594 |
static bool SendPackets(ClientState *cs)
|
|
595 |
{
|
|
596 |
Packet *p;
|
|
597 |
int n;
|
|
598 |
uint nskip = cs->eaten, nsent = nskip;
|
|
599 |
|
|
600 |
// try sending as much as possible.
|
|
601 |
for(p=cs->head; p ;p = p->next) {
|
|
602 |
if (p->siz) {
|
|
603 |
assert(nskip < p->siz);
|
|
604 |
|
|
605 |
n = send(cs->socket, p->buf + nskip, p->siz - nskip, 0);
|
|
606 |
if (n == -1) {
|
|
607 |
int err = GET_LAST_ERROR();
|
|
608 |
if (err == EWOULDBLOCK) break;
|
|
609 |
printf("net: send() failed with error %d\n", err);
|
|
610 |
CloseClient(cs);
|
|
611 |
return false;
|
|
612 |
}
|
|
613 |
nsent += n;
|
|
614 |
// send was not able to send it all? then we assume that the os buffer is full and break.
|
|
615 |
if (nskip + n != p->siz)
|
|
616 |
break;
|
|
617 |
nskip = 0;
|
|
618 |
}
|
|
619 |
}
|
|
620 |
|
|
621 |
// nsent bytes in the linked list are not invalid. free as many buffers as possible.
|
|
622 |
// don't actually free the last buffer.
|
|
623 |
while (nsent) {
|
|
624 |
p = cs->head;
|
|
625 |
assert(p->siz != 0);
|
|
626 |
|
|
627 |
// some bytes of the packet are still unsent.
|
|
628 |
if ( (int)(nsent - p->siz) < 0)
|
|
629 |
break;
|
|
630 |
nsent -= p->siz;
|
|
631 |
p->siz = 0;
|
|
632 |
if (p->next) {
|
|
633 |
cs->head = p->next;
|
|
634 |
free(p);
|
|
635 |
}
|
|
636 |
}
|
|
637 |
|
|
638 |
cs->eaten = nsent;
|
|
639 |
|
|
640 |
return true;
|
|
641 |
}
|
|
642 |
|
|
643 |
// transmit the file..
|
|
644 |
static void SendXmit(ClientState *cs)
|
|
645 |
{
|
|
646 |
uint pos, n;
|
|
647 |
FilePacketHdr hdr;
|
|
648 |
int p;
|
|
649 |
|
|
650 |
// if too many unsent bytes left in buffer, don't send more.
|
|
651 |
if (cs->head && cs->head->next)
|
|
652 |
return;
|
|
653 |
|
|
654 |
pos = cs->xmitpos - 1;
|
|
655 |
|
|
656 |
p = 20;
|
|
657 |
do {
|
|
658 |
// compute size of data to xmit
|
|
659 |
n = minu(_transmit_file_size - pos, 248);
|
|
660 |
|
|
661 |
hdr.packet_length = n + sizeof(hdr);
|
|
662 |
hdr.packet_type = 3;
|
|
663 |
hdr.unused[0] = hdr.unused[1] = 0;
|
|
664 |
SendBytes(cs, &hdr, sizeof(hdr));
|
|
665 |
|
|
666 |
if (n == 0) {
|
|
667 |
pos = -1; // eof
|
|
668 |
break;
|
|
669 |
}
|
|
670 |
SendBytes(cs, _transmit_file + pos, n);
|
|
671 |
pos += n;
|
|
672 |
} while (--p);
|
|
673 |
|
|
674 |
cs->xmitpos = pos + 1;
|
|
675 |
|
|
676 |
printf("net: client xmit at %d\n", pos + 1);
|
|
677 |
}
|
|
678 |
|
|
679 |
static ClientState *AllocClient(SOCKET s)
|
|
680 |
{
|
|
681 |
ClientState *cs;
|
|
682 |
|
|
683 |
if (_num_clients == MAX_CLIENTS)
|
|
684 |
return NULL;
|
|
685 |
|
|
686 |
cs = &_clients[_num_clients++];
|
|
687 |
memset(cs, 0, sizeof(*cs));
|
|
688 |
cs->last = &cs->head;
|
|
689 |
cs->socket = s;
|
|
690 |
return cs;
|
|
691 |
}
|
|
692 |
|
|
693 |
|
|
694 |
static void NetworkAcceptClients()
|
|
695 |
{
|
|
696 |
struct sockaddr_in sin;
|
|
697 |
SOCKET s;
|
|
698 |
ClientState *cs;
|
|
699 |
#ifndef __MORPHOS__
|
|
700 |
int sin_len;
|
|
701 |
#else
|
|
702 |
LONG sin_len; // for some reason we need a 'LONG' under MorphOS
|
|
703 |
#endif
|
|
704 |
|
|
705 |
assert(_listensocket != INVALID_SOCKET);
|
|
706 |
|
|
707 |
for(;;) {
|
|
708 |
sin_len = sizeof(sin);
|
|
709 |
s = accept(_listensocket, (struct sockaddr*)&sin, &sin_len);
|
|
710 |
if (s == INVALID_SOCKET) return;
|
|
711 |
|
|
712 |
// set nonblocking mode for client socket
|
|
713 |
{ unsigned long blocking = 1; ioctlsocket(s, FIONBIO, &blocking); }
|
|
714 |
|
|
715 |
printf("net: got client from %s\n", inet_ntoa(sin.sin_addr));
|
|
716 |
|
|
717 |
// set nodelay
|
|
718 |
{int b = 1; setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (const char*)&b, sizeof(b));}
|
|
719 |
|
|
720 |
cs = AllocClient(s);
|
|
721 |
if (cs == NULL) {
|
|
722 |
// no more clients allowed?
|
|
723 |
closesocket(s);
|
|
724 |
continue;
|
|
725 |
}
|
|
726 |
|
|
727 |
if (_networking_sync) {
|
|
728 |
// a new client has connected. it needs a snapshot.
|
|
729 |
cs->inactive = true;
|
|
730 |
}
|
|
731 |
}
|
|
732 |
|
|
733 |
// when a new client has joined. it needs different information depending on if it's at the game menu or in an active game.
|
|
734 |
// Game menu:
|
|
735 |
// - list of players already in the game (name, company name, face, color)
|
|
736 |
// - list of game settings and patch settings
|
|
737 |
// Active game:
|
|
738 |
// - the state of the world (includes player name, company name, player face, player color)
|
|
739 |
// - list of the patch settings
|
|
740 |
|
|
741 |
// Networking can be in several "states".
|
|
742 |
// * not sync - games don't need to be in sync, and frame counter is not synced. for example intro screen. all commands are executed immediately.
|
|
743 |
// * sync - games are in sync
|
|
744 |
}
|
|
745 |
|
|
746 |
|
|
747 |
static void SendQueuedCommandsToNewClient(ClientState *cs)
|
|
748 |
{
|
|
749 |
// send the commands in the server queue to the new client.
|
|
750 |
QueuedCommand *qp;
|
|
751 |
SyncPacket sp;
|
|
752 |
int32 frame;
|
|
753 |
|
|
754 |
printf("net: sending queued commands to client\n");
|
|
755 |
|
|
756 |
sp.packet_length = sizeof(sp);
|
|
757 |
sp.packet_type = 1;
|
|
758 |
sp.random_seed_1 = sp.random_seed_2 = 0;
|
|
759 |
sp.server = 0;
|
|
760 |
|
|
761 |
frame = _frame_counter;
|
|
762 |
|
|
763 |
for(qp=_command_queue.head; qp; qp = qp->next) {
|
|
764 |
printf("net: sending cmd to be executed at %d (old %d)\n", qp->frame, frame);
|
|
765 |
if (qp->frame > frame) {
|
|
766 |
assert(qp->frame <= _frame_counter_max);
|
|
767 |
sp.frames = qp->frame - frame;
|
|
768 |
frame = qp->frame;
|
|
769 |
SendBytes(cs, &sp, sizeof(sp));
|
|
770 |
}
|
|
771 |
SendBytes(cs, &qp->cp, qp->cp.packet_length);
|
|
772 |
}
|
|
773 |
|
|
774 |
if (frame < _frame_counter_max) {
|
|
775 |
printf("net: sending queued sync %d (%d)\n", _frame_counter_max, frame);
|
|
776 |
sp.frames = _frame_counter_max - frame;
|
|
777 |
SendBytes(cs, &sp, sizeof(sp));
|
|
778 |
}
|
|
779 |
|
|
780 |
}
|
|
781 |
|
|
782 |
void NetworkReceive()
|
|
783 |
{
|
|
784 |
ClientState *cs;
|
|
785 |
int n;
|
|
786 |
fd_set read_fd, write_fd;
|
|
787 |
struct timeval tv;
|
|
788 |
|
|
789 |
NetworkUDPReceive(); // udp handling
|
|
790 |
|
|
791 |
FD_ZERO(&read_fd);
|
|
792 |
FD_ZERO(&write_fd);
|
|
793 |
|
|
794 |
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
|
|
795 |
FD_SET(cs->socket, &read_fd);
|
|
796 |
FD_SET(cs->socket, &write_fd);
|
|
797 |
}
|
|
798 |
|
|
799 |
// take care of listener port
|
|
800 |
if (_networking_server) {
|
|
801 |
FD_SET(_listensocket, &read_fd);
|
|
802 |
}
|
|
803 |
|
|
804 |
tv.tv_sec = tv.tv_usec = 0; // don't block at all.
|
|
805 |
#if !defined(__MORPHOS__) && !defined(__AMIGA__)
|
|
806 |
n = select(FD_SETSIZE, &read_fd, &write_fd, NULL, &tv);
|
|
807 |
#else
|
|
808 |
n = WaitSelect(FD_SETSIZE, &read_fd, &write_fd, NULL, &tv, NULL);
|
|
809 |
#endif
|
|
810 |
if (n == -1) error("select failed");
|
|
811 |
|
|
812 |
// accept clients..
|
|
813 |
if (_networking_server && FD_ISSET(_listensocket, &read_fd))
|
|
814 |
NetworkAcceptClients();
|
|
815 |
|
|
816 |
// read stuff from clients
|
|
817 |
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
|
|
818 |
cs->writable = !!FD_ISSET(cs->socket, &write_fd);
|
|
819 |
if (FD_ISSET(cs->socket, &read_fd)) {
|
|
820 |
if (!ReadPackets(cs))
|
|
821 |
cs--;
|
|
822 |
}
|
|
823 |
}
|
|
824 |
|
|
825 |
// if we're a server, and any client needs a snapshot, create a snapshot and send all commands from the server queue to the client.
|
|
826 |
if (_networking_server && _transmit_file == NULL) {
|
|
827 |
bool didsave = false;
|
|
828 |
|
|
829 |
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
|
|
830 |
if (cs->inactive) {
|
|
831 |
cs->inactive = false;
|
|
832 |
// found a client waiting for a snapshot. make a snapshot.
|
|
833 |
if (!didsave) {
|
|
834 |
char filename[256];
|
|
835 |
sprintf(filename, "%snetwork.tmp", _path.autosave_dir);
|
|
836 |
didsave = true;
|
|
837 |
if (SaveOrLoad(filename, SL_SAVE) != SL_OK) error("network savedump failed");
|
|
838 |
_transmit_file = ReadFileToMem(filename, &_transmit_file_size, 500000);
|
|
839 |
if (_transmit_file == NULL) error("network savedump failed to load");
|
|
840 |
}
|
|
841 |
// and start sending the file..
|
|
842 |
cs->xmitpos = 1;
|
|
843 |
|
|
844 |
// send queue of commands to client.
|
|
845 |
SendQueuedCommandsToNewClient(cs);
|
|
846 |
}
|
|
847 |
}
|
|
848 |
}
|
|
849 |
}
|
|
850 |
|
|
851 |
void NetworkSend()
|
|
852 |
{
|
|
853 |
ClientState *cs;
|
|
854 |
void *free_xmit;
|
|
855 |
|
|
856 |
// send sync packets?
|
|
857 |
if (_networking_server && _networking_sync && !_pause) {
|
|
858 |
if (++_not_packet >= _network_sync_freq) {
|
|
859 |
SyncPacket sp;
|
|
860 |
uint new_max;
|
|
861 |
|
|
862 |
_not_packet = 0;
|
|
863 |
|
|
864 |
new_max = max(_frame_counter + (int)_network_ahead_frames, _frame_counter_max);
|
|
865 |
|
|
866 |
sp.packet_length = sizeof(sp);
|
|
867 |
sp.packet_type = 1;
|
|
868 |
sp.frames = new_max - _frame_counter_max;
|
|
869 |
sp.server = _frame_counter_max - _frame_counter;
|
|
870 |
sp.random_seed_1 = TO_LE32(_sync_seed_1);
|
|
871 |
sp.random_seed_2 = TO_LE32(_sync_seed_2);
|
|
872 |
_frame_counter_max = new_max;
|
|
873 |
|
|
874 |
// send it to all the clients
|
|
875 |
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) SendBytes(cs, &sp, sizeof(sp));
|
|
876 |
}
|
|
877 |
}
|
|
878 |
|
|
879 |
free_xmit = _transmit_file;
|
|
880 |
|
|
881 |
// send stuff to all clients
|
|
882 |
for(cs=_clients;cs->socket != INVALID_SOCKET; cs++) {
|
|
883 |
if (cs->xmitpos) {
|
|
884 |
if (cs->writable)
|
|
885 |
SendXmit(cs);
|
|
886 |
free_xmit = NULL;
|
|
887 |
}
|
|
888 |
if (cs->writable) {
|
|
889 |
if (!SendPackets(cs)) cs--;
|
|
890 |
}
|
|
891 |
}
|
|
892 |
|
|
893 |
// no clients left that xmit the file, free it.
|
|
894 |
if (free_xmit) {
|
|
895 |
_transmit_file = NULL;
|
|
896 |
free(free_xmit);
|
|
897 |
}
|
|
898 |
}
|
|
899 |
|
|
900 |
void NetworkConnect(const char *hostname, int port)
|
|
901 |
{
|
|
902 |
SOCKET s;
|
|
903 |
struct sockaddr_in sin;
|
|
904 |
int b;
|
|
905 |
|
|
906 |
|
|
907 |
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
908 |
if (s == INVALID_SOCKET) error("socket() failed");
|
|
909 |
|
|
910 |
b = 1;
|
|
911 |
setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (const char*)&b, sizeof(b));
|
|
912 |
|
|
913 |
if (strcmp(hostname,"auto")==0) {
|
|
914 |
// autodetect server over udp broadcast [works 4 lan]
|
|
915 |
if (NetworkUDPSearchServer()) {
|
|
916 |
hostname=_network_detected_serverip;
|
|
917 |
port=_network_detected_serverport;
|
|
918 |
} else {
|
|
919 |
error("udp: server not found");
|
|
920 |
}
|
|
921 |
}
|
|
922 |
|
|
923 |
sin.sin_family = AF_INET;
|
|
924 |
sin.sin_addr.s_addr = inet_addr(hostname);
|
|
925 |
sin.sin_port = htons(port);
|
|
926 |
|
|
927 |
if (connect(s, (struct sockaddr*) &sin, sizeof(sin)) != 0)
|
|
928 |
error("connect() failed");
|
|
929 |
|
|
930 |
// set nonblocking mode for socket..
|
|
931 |
{ unsigned long blocking = 1; ioctlsocket(s, FIONBIO, &blocking); }
|
|
932 |
|
|
933 |
// in client mode, only the first client field is used. it's pointing to the server.
|
|
934 |
AllocClient(s);
|
|
935 |
|
|
936 |
// queue packets.. because we're waiting for the savegame.
|
|
937 |
_networking_queuing = true;
|
|
938 |
_frame_counter_max = 0;
|
|
939 |
|
|
940 |
}
|
|
941 |
|
|
942 |
void NetworkListen(int port)
|
|
943 |
{
|
|
944 |
|
|
945 |
SOCKET ls;
|
|
946 |
struct sockaddr_in sin;
|
|
947 |
|
|
948 |
ls = socket(AF_INET, SOCK_STREAM, 0);
|
|
949 |
if (ls == INVALID_SOCKET)
|
|
950 |
error("socket() on listen socket failed");
|
|
951 |
|
|
952 |
// reuse the socket
|
|
953 |
{
|
|
954 |
int reuse = 1; if (setsockopt(ls, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse, sizeof(reuse)) == -1)
|
|
955 |
error("setsockopt() on listen socket failed");
|
|
956 |
}
|
|
957 |
|
|
958 |
// set nonblocking mode for socket
|
|
959 |
{ unsigned long blocking = 1; ioctlsocket(ls, FIONBIO, &blocking); }
|
|
960 |
|
|
961 |
sin.sin_family = AF_INET;
|
|
962 |
sin.sin_addr.s_addr = 0;
|
|
963 |
sin.sin_port = htons(port);
|
|
964 |
|
|
965 |
if (bind(ls, (struct sockaddr*)&sin, sizeof(sin)) != 0)
|
|
966 |
error("bind() failed");
|
|
967 |
|
|
968 |
if (listen(ls, 1) != 0)
|
|
969 |
error("listen() failed");
|
|
970 |
|
|
971 |
_listensocket = ls;
|
|
972 |
}
|
|
973 |
|
1
|
974 |
void NetworkInitialize(const char *hostname)
|
0
|
975 |
{
|
|
976 |
ClientState *cs;
|
1
|
977 |
|
0
|
978 |
#if defined(WIN32)
|
|
979 |
WSADATA wsa;
|
|
980 |
if (WSAStartup(MAKEWORD(2,0), &wsa) != 0)
|
|
981 |
error("WSAStartup failed");
|
|
982 |
#endif
|
|
983 |
|
|
984 |
#if defined(__MORPHOS__) || defined(__AMIGA__)
|
|
985 |
if (!(SocketBase = OpenLibrary("bsdsocket.library", 4))) {
|
|
986 |
error("Couldn't open bsdsocket.library version 4.");
|
|
987 |
}
|
|
988 |
#endif
|
|
989 |
|
|
990 |
_command_queue.last = &_command_queue.head;
|
|
991 |
_ack_queue.last = &_ack_queue.head;
|
|
992 |
|
|
993 |
// invalidate all clients
|
|
994 |
for(cs=_clients; cs != &_clients[MAX_CLIENTS]; cs++)
|
|
995 |
cs->socket = INVALID_SOCKET;
|
|
996 |
|
1
|
997 |
/* startup udp listener
|
|
998 |
* - only if this instance is a server, so clients can find it
|
|
999 |
* OR
|
|
1000 |
* - a client, wanting to find a server to connect to
|
|
1001 |
*/
|
|
1002 |
if (hostname == NULL || strcmp(hostname,"auto") == 0) {
|
|
1003 |
printf("Trying to open UDP port...\n");
|
|
1004 |
NetworkUDPListen(_network_port);
|
|
1005 |
}
|
0
|
1006 |
}
|
|
1007 |
|
|
1008 |
void NetworkShutdown()
|
|
1009 |
{
|
|
1010 |
#if defined(__MORPHOS__) || defined(__AMIGA__)
|
|
1011 |
if (SocketBase) {
|
|
1012 |
CloseLibrary(SocketBase);
|
|
1013 |
}
|
|
1014 |
#endif
|
|
1015 |
}
|
|
1016 |
|
|
1017 |
// switch to synced mode.
|
|
1018 |
void NetworkStartSync()
|
|
1019 |
{
|
|
1020 |
_networking_sync = true;
|
|
1021 |
_frame_counter = 0;
|
|
1022 |
_frame_counter_max = 0;
|
|
1023 |
_frame_counter_srv = 0;
|
|
1024 |
_num_future_seed = 0;
|
|
1025 |
_sync_seed_1 = _sync_seed_2 = 0;
|
|
1026 |
memset(_my_seed_list, 0, sizeof(_my_seed_list));
|
|
1027 |
}
|
|
1028 |
|
|
1029 |
// ************************** //
|
|
1030 |
// * UDP Network Extensions * //
|
|
1031 |
// ************************** //
|
|
1032 |
|
|
1033 |
/* multi os compatible sleep function */
|
|
1034 |
void CSleep(int milliseconds) {
|
|
1035 |
#if defined(WIN32)
|
|
1036 |
Sleep(milliseconds);
|
|
1037 |
#endif
|
|
1038 |
#if defined(UNIX)
|
|
1039 |
#ifndef __BEOS__
|
|
1040 |
usleep(milliseconds*1000);
|
|
1041 |
#endif
|
|
1042 |
#ifdef __BEOS__
|
|
1043 |
snooze(milliseconds*1000);
|
|
1044 |
#endif
|
|
1045 |
#endif
|
|
1046 |
}
|
|
1047 |
|
|
1048 |
void NetworkUDPListen(int port)
|
|
1049 |
{
|
|
1050 |
SOCKET udp;
|
|
1051 |
struct sockaddr_in sin;
|
|
1052 |
|
|
1053 |
DEBUG(misc,0) ("udp: listener initiated on port %i", port);
|
|
1054 |
NetworkIPListInit();
|
|
1055 |
|
|
1056 |
udp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
1057 |
if (udp == INVALID_SOCKET)
|
|
1058 |
error("udp: socket() on listen socket failed");
|
|
1059 |
|
|
1060 |
// set nonblocking mode for socket
|
|
1061 |
{ unsigned long blocking = 1; ioctlsocket(udp, FIONBIO, &blocking); }
|
|
1062 |
|
|
1063 |
sin.sin_family = AF_INET;
|
|
1064 |
sin.sin_addr.s_addr = 0;
|
|
1065 |
sin.sin_port = htons(port);
|
|
1066 |
|
|
1067 |
if (bind(udp, (struct sockaddr*)&sin, sizeof(sin)) != 0)
|
|
1068 |
error("udp: bind() failed");
|
|
1069 |
|
|
1070 |
// enable broadcasting
|
|
1071 |
{ unsigned long val=1; setsockopt(udp, SOL_SOCKET, SO_BROADCAST, (char *) &val , sizeof(val)); }
|
|
1072 |
|
|
1073 |
_udpsocket = udp;
|
|
1074 |
|
|
1075 |
}
|
|
1076 |
|
|
1077 |
void NetworkUDPReceive() {
|
|
1078 |
struct sockaddr_in client_addr;
|
|
1079 |
int client_len;
|
|
1080 |
int nbytes;
|
|
1081 |
struct UDPPacket packet;
|
|
1082 |
int packet_len;
|
|
1083 |
|
|
1084 |
packet_len = sizeof(packet);
|
|
1085 |
client_len = sizeof(client_addr);
|
|
1086 |
|
|
1087 |
nbytes = recvfrom(_udpsocket, (char *) &packet, packet_len , 0, (struct sockaddr *) &client_addr, &client_len);
|
|
1088 |
if (nbytes>0) {
|
|
1089 |
if (packet.command_code==packet.command_check) switch (packet.command_code) {
|
|
1090 |
|
|
1091 |
case NET_UDPCMD_SERVERSEARCH:
|
|
1092 |
if (_networking_server) {
|
|
1093 |
packet.command_check=packet.command_code=NET_UDPCMD_SERVERACTIVE;
|
|
1094 |
NetworkUDPSend(client_addr, packet);
|
|
1095 |
}
|
|
1096 |
break;
|
|
1097 |
case NET_UDPCMD_SERVERACTIVE:
|
|
1098 |
if (!_networking_server) {
|
|
1099 |
_network_detected_serverip=inet_ntoa(*(struct in_addr *) &client_addr.sin_addr);
|
|
1100 |
_network_detected_serverport=ntohs(client_addr.sin_port);
|
|
1101 |
}
|
|
1102 |
break;
|
|
1103 |
}
|
|
1104 |
}
|
|
1105 |
}
|
|
1106 |
|
|
1107 |
void NetworkIPListInit() {
|
|
1108 |
struct hostent* he;
|
|
1109 |
char hostname[250];
|
|
1110 |
uint32 bcaddr;
|
|
1111 |
int i=0;
|
|
1112 |
|
|
1113 |
_network_detected_serverip="";
|
|
1114 |
|
|
1115 |
gethostname(hostname,250);
|
|
1116 |
DEBUG(misc,0) ("iplist: init for host %s", hostname);
|
|
1117 |
he=gethostbyname((char *) hostname);
|
|
1118 |
|
|
1119 |
while(he->h_addr_list[i]) {
|
|
1120 |
bcaddr = inet_addr(inet_ntoa(*(struct in_addr *) he->h_addr_list[i]));
|
|
1121 |
_network_ip_list[i]=bcaddr;
|
|
1122 |
DEBUG(misc,0) ("iplist: add %s",inet_ntoa(*(struct in_addr *) he->h_addr_list[i]));
|
|
1123 |
i++;
|
|
1124 |
}
|
|
1125 |
_network_ip_list[i]=0;
|
|
1126 |
|
|
1127 |
}
|
|
1128 |
|
|
1129 |
void NetworkUDPBroadCast(struct UDPPacket packet) {
|
|
1130 |
int i=0, res;
|
|
1131 |
struct sockaddr_in out_addr;
|
|
1132 |
uint32 bcaddr;
|
|
1133 |
byte * bcptr;
|
|
1134 |
while (_network_ip_list[i]!=0) {
|
|
1135 |
bcaddr=_network_ip_list[i];
|
|
1136 |
out_addr.sin_family = AF_INET;
|
|
1137 |
out_addr.sin_port = htons(_network_port);
|
|
1138 |
bcptr = (byte *) &bcaddr;
|
|
1139 |
bcptr[3]=255;
|
|
1140 |
out_addr.sin_addr.s_addr = bcaddr;
|
|
1141 |
res=sendto(_udpsocket,(char *) &packet,sizeof(packet),0,(struct sockaddr *) &out_addr,sizeof(out_addr));
|
|
1142 |
if (res==-1) error("udp: broadcast error: %i",GET_LAST_ERROR());
|
|
1143 |
i++;
|
|
1144 |
}
|
|
1145 |
|
|
1146 |
}
|
|
1147 |
|
|
1148 |
void NetworkUDPSend(struct sockaddr_in recv,struct UDPPacket packet) {
|
|
1149 |
sendto(_udpsocket,(char *) &packet,sizeof(packet),0,(struct sockaddr *) &recv,sizeof(recv));
|
|
1150 |
}
|
|
1151 |
|
|
1152 |
bool NetworkUDPSearchServer() {
|
|
1153 |
struct UDPPacket packet;
|
|
1154 |
int timeout=3000;
|
|
1155 |
DEBUG(misc,0) ("udp: searching server");
|
|
1156 |
_network_detected_serverip = "255.255.255.255";
|
|
1157 |
_network_detected_serverport = 0;
|
|
1158 |
|
|
1159 |
packet.command_check=packet.command_code=NET_UDPCMD_SERVERSEARCH;
|
|
1160 |
packet.data_len=0;
|
|
1161 |
NetworkUDPBroadCast(packet);
|
|
1162 |
while (timeout>=0) {
|
|
1163 |
CSleep(100);
|
|
1164 |
timeout-=100;
|
|
1165 |
NetworkUDPReceive();
|
|
1166 |
if (_network_detected_serverport>0) {
|
|
1167 |
timeout=-1;
|
|
1168 |
DEBUG(misc,0) ("udp: server found on %s", _network_detected_serverip);
|
|
1169 |
}
|
|
1170 |
}
|
|
1171 |
return (_network_detected_serverport>0);
|
|
1172 |
|
|
1173 |
}
|
|
1174 |
|
|
1175 |
|
|
1176 |
#else // ENABLE_NETWORK
|
|
1177 |
|
|
1178 |
// stubs
|
1
|
1179 |
void NetworkInitialize(const char *hostname) {}
|
0
|
1180 |
void NetworkShutdown() {}
|
|
1181 |
void NetworkListen(int port) {}
|
|
1182 |
void NetworkConnect(const char *hostname, int port) {}
|
|
1183 |
void NetworkReceive() {}
|
|
1184 |
void NetworkSend() {}
|
|
1185 |
void NetworkSendCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback) {}
|
|
1186 |
void NetworkProcessCommands() {}
|
|
1187 |
void NetworkStartSync() {}
|
|
1188 |
void NetworkUDPListen(int port) {}
|
|
1189 |
void NetworkUDPReceive() {}
|
|
1190 |
bool NetworkUDPSearchServer() {}
|
|
1191 |
#endif // ENABLE_NETWORK
|