1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19 */
20 // net_wins.c
21
22 #include "quakedef.h"
23 #include "winquake.h"
24
25 extern cvar_t hostname;
26
27 #define MAXHOSTNAMELEN 256
28
29 static int net_acceptsocket = -1; // socket for fielding new connections
30 static int net_controlsocket;
31 static int net_broadcastsocket = 0;
32 static struct qsockaddr broadcastaddr;
33
34 static unsigned long myAddr;
35
36 qboolean winsock_lib_initialized;
37
38 int (PASCAL FAR *pWSAStartup)(WORD wVersionRequired, LPWSADATA lpWSAData);
39 int (PASCAL FAR *pWSACleanup)(void);
40 int (PASCAL FAR *pWSAGetLastError)(void);
41 SOCKET (PASCAL FAR *psocket)(int af, int type, int protocol);
42 int (PASCAL FAR *pioctlsocket)(SOCKET s, long cmd, u_long FAR *argp);
43 int (PASCAL FAR *psetsockopt)(SOCKET s, int level, int optname,
44 const char FAR * optval, int optlen);
45 int (PASCAL FAR *precvfrom)(SOCKET s, char FAR * buf, int len, int flags,
46 struct sockaddr FAR *from, int FAR * fromlen);
47 int (PASCAL FAR *psendto)(SOCKET s, const char FAR * buf, int len, int flags,
48 const struct sockaddr FAR *to, int tolen);
49 int (PASCAL FAR *pclosesocket)(SOCKET s);
50 int (PASCAL FAR *pgethostname)(char FAR * name, int namelen);
51 struct hostent FAR * (PASCAL FAR *pgethostbyname)(const char FAR * name);
52 struct hostent FAR * (PASCAL FAR *pgethostbyaddr)(const char FAR * addr,
53 int len, int type);
54 int (PASCAL FAR *pgetsockname)(SOCKET s, struct sockaddr FAR *name,
55 int FAR * namelen);
56
57 #include "net_wins.h"
58
59 int winsock_initialized = 0;
60 WSADATA winsockdata;
61
62 //=============================================================================
63
64 static double blocktime;
65
BlockingHook(void)66 BOOL PASCAL FAR BlockingHook(void)
67 {
68 MSG msg;
69 BOOL ret;
70
71 if ((Sys_FloatTime() - blocktime) > 2.0)
72 {
73 WSACancelBlockingCall();
74 return FALSE;
75 }
76
77 /* get the next message, if any */
78 ret = (BOOL) PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
79
80 /* if we got one, process it */
81 if (ret) {
82 TranslateMessage(&msg);
83 DispatchMessage(&msg);
84 }
85
86 /* TRUE if we got a message */
87 return ret;
88 }
89
90
WINS_GetLocalAddress()91 void WINS_GetLocalAddress()
92 {
93 struct hostent *local = NULL;
94 char buff[MAXHOSTNAMELEN];
95 unsigned long addr;
96
97 if (myAddr != INADDR_ANY)
98 return;
99
100 if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
101 return;
102
103 blocktime = Sys_FloatTime();
104 WSASetBlockingHook(BlockingHook);
105 local = pgethostbyname(buff);
106 WSAUnhookBlockingHook();
107 if (local == NULL)
108 return;
109
110 myAddr = *(int *)local->h_addr_list[0];
111
112 addr = ntohl(myAddr);
113 sprintf(my_tcpip_address, "%d.%d.%d.%d", (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff);
114 }
115
116
WINS_Init(void)117 int WINS_Init (void)
118 {
119 int i;
120 char buff[MAXHOSTNAMELEN];
121 char *p;
122 int r;
123 WORD wVersionRequested;
124 HINSTANCE hInst;
125
126 // initialize the Winsock function vectors (we do this instead of statically linking
127 // so we can run on Win 3.1, where there isn't necessarily Winsock)
128 hInst = LoadLibrary("wsock32.dll");
129
130 if (hInst == NULL)
131 {
132 Con_SafePrintf ("Failed to load winsock.dll\n");
133 winsock_lib_initialized = false;
134 return -1;
135 }
136
137 winsock_lib_initialized = true;
138
139 pWSAStartup = (void *)GetProcAddress(hInst, "WSAStartup");
140 pWSACleanup = (void *)GetProcAddress(hInst, "WSACleanup");
141 pWSAGetLastError = (void *)GetProcAddress(hInst, "WSAGetLastError");
142 psocket = (void *)GetProcAddress(hInst, "socket");
143 pioctlsocket = (void *)GetProcAddress(hInst, "ioctlsocket");
144 psetsockopt = (void *)GetProcAddress(hInst, "setsockopt");
145 precvfrom = (void *)GetProcAddress(hInst, "recvfrom");
146 psendto = (void *)GetProcAddress(hInst, "sendto");
147 pclosesocket = (void *)GetProcAddress(hInst, "closesocket");
148 pgethostname = (void *)GetProcAddress(hInst, "gethostname");
149 pgethostbyname = (void *)GetProcAddress(hInst, "gethostbyname");
150 pgethostbyaddr = (void *)GetProcAddress(hInst, "gethostbyaddr");
151 pgetsockname = (void *)GetProcAddress(hInst, "getsockname");
152
153 if (!pWSAStartup || !pWSACleanup || !pWSAGetLastError ||
154 !psocket || !pioctlsocket || !psetsockopt ||
155 !precvfrom || !psendto || !pclosesocket ||
156 !pgethostname || !pgethostbyname || !pgethostbyaddr ||
157 !pgetsockname)
158 {
159 Con_SafePrintf ("Couldn't GetProcAddress from winsock.dll\n");
160 return -1;
161 }
162
163 if (COM_CheckParm ("-noudp"))
164 return -1;
165
166 if (winsock_initialized == 0)
167 {
168 wVersionRequested = MAKEWORD(1, 1);
169
170 r = pWSAStartup (MAKEWORD(1, 1), &winsockdata);
171
172 if (r)
173 {
174 Con_SafePrintf ("Winsock initialization failed.\n");
175 return -1;
176 }
177 }
178 winsock_initialized++;
179
180 // determine my name
181 if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
182 {
183 Con_DPrintf ("Winsock TCP/IP Initialization failed.\n");
184 if (--winsock_initialized == 0)
185 pWSACleanup ();
186 return -1;
187 }
188
189 // if the quake hostname isn't set, set it to the machine name
190 if (Q_strcmp(hostname.string, "UNNAMED") == 0)
191 {
192 // see if it's a text IP address (well, close enough)
193 for (p = buff; *p; p++)
194 if ((*p < '0' || *p > '9') && *p != '.')
195 break;
196
197 // if it is a real name, strip off the domain; we only want the host
198 if (*p)
199 {
200 for (i = 0; i < 15; i++)
201 if (buff[i] == '.')
202 break;
203 buff[i] = 0;
204 }
205 Cvar_Set ("hostname", buff);
206 }
207
208 i = COM_CheckParm ("-ip");
209 if (i)
210 {
211 if (i < com_argc-1)
212 {
213 myAddr = inet_addr(com_argv[i+1]);
214 if (myAddr == INADDR_NONE)
215 Sys_Error ("%s is not a valid IP address", com_argv[i+1]);
216 strcpy(my_tcpip_address, com_argv[i+1]);
217 }
218 else
219 {
220 Sys_Error ("NET_Init: you must specify an IP address after -ip");
221 }
222 }
223 else
224 {
225 myAddr = INADDR_ANY;
226 strcpy(my_tcpip_address, "INADDR_ANY");
227 }
228
229 if ((net_controlsocket = WINS_OpenSocket (0)) == -1)
230 {
231 Con_Printf("WINS_Init: Unable to open control socket\n");
232 if (--winsock_initialized == 0)
233 pWSACleanup ();
234 return -1;
235 }
236
237 ((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET;
238 ((struct sockaddr_in *)&broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST;
239 ((struct sockaddr_in *)&broadcastaddr)->sin_port = htons((unsigned short)net_hostport);
240
241 Con_Printf("Winsock TCP/IP Initialized\n");
242 tcpipAvailable = true;
243
244 return net_controlsocket;
245 }
246
247 //=============================================================================
248
WINS_Shutdown(void)249 void WINS_Shutdown (void)
250 {
251 WINS_Listen (false);
252 WINS_CloseSocket (net_controlsocket);
253 if (--winsock_initialized == 0)
254 pWSACleanup ();
255 }
256
257 //=============================================================================
258
WINS_Listen(qboolean state)259 void WINS_Listen (qboolean state)
260 {
261 // enable listening
262 if (state)
263 {
264 if (net_acceptsocket != -1)
265 return;
266 WINS_GetLocalAddress();
267 if ((net_acceptsocket = WINS_OpenSocket (net_hostport)) == -1)
268 Sys_Error ("WINS_Listen: Unable to open accept socket\n");
269 return;
270 }
271
272 // disable listening
273 if (net_acceptsocket == -1)
274 return;
275 WINS_CloseSocket (net_acceptsocket);
276 net_acceptsocket = -1;
277 }
278
279 //=============================================================================
280
WINS_OpenSocket(int port)281 int WINS_OpenSocket (int port)
282 {
283 int newsocket;
284 struct sockaddr_in address;
285 u_long _true = 1;
286
287 if ((newsocket = psocket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
288 return -1;
289
290 if (pioctlsocket (newsocket, FIONBIO, &_true) == -1)
291 goto ErrorReturn;
292
293 address.sin_family = AF_INET;
294 address.sin_addr.s_addr = myAddr;
295 address.sin_port = htons((unsigned short)port);
296 if( bind (newsocket, (void *)&address, sizeof(address)) == 0)
297 return newsocket;
298
299 Sys_Error ("Unable to bind to %s", WINS_AddrToString((struct qsockaddr *)&address));
300 ErrorReturn:
301 pclosesocket (newsocket);
302 return -1;
303 }
304
305 //=============================================================================
306
WINS_CloseSocket(int socket)307 int WINS_CloseSocket (int socket)
308 {
309 if (socket == net_broadcastsocket)
310 net_broadcastsocket = 0;
311 return pclosesocket (socket);
312 }
313
314
315 //=============================================================================
316 /*
317 ============
318 PartialIPAddress
319
320 this lets you type only as much of the net address as required, using
321 the local network components to fill in the rest
322 ============
323 */
PartialIPAddress(char * in,struct qsockaddr * hostaddr)324 static int PartialIPAddress (char *in, struct qsockaddr *hostaddr)
325 {
326 char buff[256];
327 char *b;
328 int addr;
329 int num;
330 int mask;
331 int run;
332 int port;
333
334 buff[0] = '.';
335 b = buff;
336 strcpy(buff+1, in);
337 if (buff[1] == '.')
338 b++;
339
340 addr = 0;
341 mask=-1;
342 while (*b == '.')
343 {
344 b++;
345 num = 0;
346 run = 0;
347 while (!( *b < '0' || *b > '9'))
348 {
349 num = num*10 + *b++ - '0';
350 if (++run > 3)
351 return -1;
352 }
353 if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
354 return -1;
355 if (num < 0 || num > 255)
356 return -1;
357 mask<<=8;
358 addr = (addr<<8) + num;
359 }
360
361 if (*b++ == ':')
362 port = Q_atoi(b);
363 else
364 port = net_hostport;
365
366 hostaddr->sa_family = AF_INET;
367 ((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port);
368 ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr = (myAddr & htonl(mask)) | htonl(addr);
369
370 return 0;
371 }
372 //=============================================================================
373
WINS_Connect(int socket,struct qsockaddr * addr)374 int WINS_Connect (int socket, struct qsockaddr *addr)
375 {
376 return 0;
377 }
378
379 //=============================================================================
380
WINS_CheckNewConnections(void)381 int WINS_CheckNewConnections (void)
382 {
383 char buf[4096];
384
385 if (net_acceptsocket == -1)
386 return -1;
387
388 if (precvfrom (net_acceptsocket, buf, sizeof(buf), MSG_PEEK, NULL, NULL) > 0)
389 {
390 return net_acceptsocket;
391 }
392 return -1;
393 }
394
395 //=============================================================================
396
WINS_Read(int socket,byte * buf,int len,struct qsockaddr * addr)397 int WINS_Read (int socket, byte *buf, int len, struct qsockaddr *addr)
398 {
399 int addrlen = sizeof (struct qsockaddr);
400 int ret;
401
402 ret = precvfrom (socket, buf, len, 0, (struct sockaddr *)addr, &addrlen);
403 if (ret == -1)
404 {
405 int _errno = pWSAGetLastError();
406
407 if (_errno == WSAEWOULDBLOCK || _errno == WSAECONNREFUSED)
408 return 0;
409
410 }
411 return ret;
412 }
413
414 //=============================================================================
415
WINS_MakeSocketBroadcastCapable(int socket)416 int WINS_MakeSocketBroadcastCapable (int socket)
417 {
418 int i = 1;
419
420 // make this socket broadcast capable
421 if (psetsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i)) < 0)
422 return -1;
423 net_broadcastsocket = socket;
424
425 return 0;
426 }
427
428 //=============================================================================
429
WINS_Broadcast(int socket,byte * buf,int len)430 int WINS_Broadcast (int socket, byte *buf, int len)
431 {
432 int ret;
433
434 if (socket != net_broadcastsocket)
435 {
436 if (net_broadcastsocket != 0)
437 Sys_Error("Attempted to use multiple broadcasts sockets\n");
438 WINS_GetLocalAddress();
439 ret = WINS_MakeSocketBroadcastCapable (socket);
440 if (ret == -1)
441 {
442 Con_Printf("Unable to make socket broadcast capable\n");
443 return ret;
444 }
445 }
446
447 return WINS_Write (socket, buf, len, &broadcastaddr);
448 }
449
450 //=============================================================================
451
WINS_Write(int socket,byte * buf,int len,struct qsockaddr * addr)452 int WINS_Write (int socket, byte *buf, int len, struct qsockaddr *addr)
453 {
454 int ret;
455
456 ret = psendto (socket, buf, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr));
457 if (ret == -1)
458 if (pWSAGetLastError() == WSAEWOULDBLOCK)
459 return 0;
460
461 return ret;
462 }
463
464 //=============================================================================
465
WINS_AddrToString(struct qsockaddr * addr)466 char *WINS_AddrToString (struct qsockaddr *addr)
467 {
468 static char buffer[22];
469 int haddr;
470
471 haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr);
472 sprintf(buffer, "%d.%d.%d.%d:%d", (haddr >> 24) & 0xff, (haddr >> 16) & 0xff, (haddr >> 8) & 0xff, haddr & 0xff, ntohs(((struct sockaddr_in *)addr)->sin_port));
473 return buffer;
474 }
475
476 //=============================================================================
477
WINS_StringToAddr(char * string,struct qsockaddr * addr)478 int WINS_StringToAddr (char *string, struct qsockaddr *addr)
479 {
480 int ha1, ha2, ha3, ha4, hp;
481 int ipaddr;
482
483 sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);
484 ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
485
486 addr->sa_family = AF_INET;
487 ((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);
488 ((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)hp);
489 return 0;
490 }
491
492 //=============================================================================
493
WINS_GetSocketAddr(int socket,struct qsockaddr * addr)494 int WINS_GetSocketAddr (int socket, struct qsockaddr *addr)
495 {
496 int addrlen = sizeof(struct qsockaddr);
497 unsigned int a;
498
499 Q_memset(addr, 0, sizeof(struct qsockaddr));
500 pgetsockname(socket, (struct sockaddr *)addr, &addrlen);
501 a = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
502 if (a == 0 || a == inet_addr("127.0.0.1"))
503 ((struct sockaddr_in *)addr)->sin_addr.s_addr = myAddr;
504
505 return 0;
506 }
507
508 //=============================================================================
509
WINS_GetNameFromAddr(struct qsockaddr * addr,char * name)510 int WINS_GetNameFromAddr (struct qsockaddr *addr, char *name)
511 {
512 struct hostent *hostentry;
513
514 hostentry = pgethostbyaddr ((char *)&((struct sockaddr_in *)addr)->sin_addr, sizeof(struct in_addr), AF_INET);
515 if (hostentry)
516 {
517 Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1);
518 return 0;
519 }
520
521 Q_strcpy (name, WINS_AddrToString (addr));
522 return 0;
523 }
524
525 //=============================================================================
526
WINS_GetAddrFromName(char * name,struct qsockaddr * addr)527 int WINS_GetAddrFromName(char *name, struct qsockaddr *addr)
528 {
529 struct hostent *hostentry;
530
531 if (name[0] >= '0' && name[0] <= '9')
532 return PartialIPAddress (name, addr);
533
534 hostentry = pgethostbyname (name);
535 if (!hostentry)
536 return -1;
537
538 addr->sa_family = AF_INET;
539 ((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)net_hostport);
540 ((struct sockaddr_in *)addr)->sin_addr.s_addr = *(int *)hostentry->h_addr_list[0];
541
542 return 0;
543 }
544
545 //=============================================================================
546
WINS_AddrCompare(struct qsockaddr * addr1,struct qsockaddr * addr2)547 int WINS_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
548 {
549 if (addr1->sa_family != addr2->sa_family)
550 return -1;
551
552 if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr)
553 return -1;
554
555 if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port)
556 return 1;
557
558 return 0;
559 }
560
561 //=============================================================================
562
WINS_GetSocketPort(struct qsockaddr * addr)563 int WINS_GetSocketPort (struct qsockaddr *addr)
564 {
565 return ntohs(((struct sockaddr_in *)addr)->sin_port);
566 }
567
568
WINS_SetSocketPort(struct qsockaddr * addr,int port)569 int WINS_SetSocketPort (struct qsockaddr *addr, int port)
570 {
571 ((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)port);
572 return 0;
573 }
574
575 //=============================================================================
576