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/cvs/deliantra/server/socket/init.c
Revision: 1.1
Committed: Fri Feb 3 07:14:44 2006 UTC (18 years, 4 months ago) by root
Content type: text/plain
Branch: MAIN
Branch point for: UPSTREAM
Log Message:
Initial revision

File Contents

# User Rev Content
1 root 1.1 /*
2     * static char *rcsid_init_c =
3     * "$Id: init.c,v 1.46 2006/01/30 17:00:34 cavesomething Exp $";
4     */
5    
6     /*
7     CrossFire, A Multiplayer game for X-windows
8    
9     Copyright (C) 2001 Mark Wedel
10     Copyright (C) 1992 Frank Tore Johansen
11    
12     This program is free software; you can redistribute it and/or modify
13     it under the terms of the GNU General Public License as published by
14     the Free Software Foundation; either version 2 of the License, or
15     (at your option) any later version.
16    
17     This program is distributed in the hope that it will be useful,
18     but WITHOUT ANY WARRANTY; without even the implied warranty of
19     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20     GNU General Public License for more details.
21    
22     You should have received a copy of the GNU General Public License
23     along with this program; if not, write to the Free Software
24     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25    
26     The author can be reached via e-mail to crossfire-devel@real-time.com
27     */
28    
29     /**
30     * \file
31     * Socket general functions
32     *
33     * \date 2003-12-02
34     *
35     * Mainly deals with initialization and higher level socket
36     * maintenance (checking for lost connections and if data has arrived.)
37     * The reading of data is handled in ericserver.c
38     */
39    
40    
41     #include <global.h>
42     #ifndef __CEXTRACT__
43     #include <sproto.h>
44     #endif
45     #ifndef WIN32 /* ---win32 exclude include files */
46     #include <sys/types.h>
47     #include <sys/time.h>
48     #include <sys/socket.h>
49     #include <netinet/in.h>
50     #include <netdb.h>
51     #endif /* win32 */
52    
53     #ifdef HAVE_UNISTD_H
54     #include <unistd.h>
55     #endif
56    
57     #ifdef HAVE_ARPA_INET_H
58     #include <arpa/inet.h>
59     #endif
60     #include <newserver.h>
61    
62     Socket_Info socket_info;
63     NewSocket *init_sockets;
64    
65     /**
66     * Initializes a connection. Really, it just sets up the data structure,
67     * socket setup is handled elsewhere. We do send a version to the
68     * client.
69     */
70     void InitConnection(NewSocket *ns, const char *from_ip)
71     {
72     SockList sl;
73     unsigned char buf[256];
74     int bufsize=65535; /*Supposed absolute upper limit */
75     int oldbufsize;
76     int buflen=sizeof(int);
77    
78     #ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */
79     int temp = 1;
80    
81     if(ioctlsocket(ns->fd, FIONBIO , &temp) == -1)
82     LOG(llevError,"InitConnection: Error on ioctlsocket.\n");
83     #else
84     if (fcntl(ns->fd, F_SETFL, O_NONBLOCK)==-1) {
85     LOG(llevError,"InitConnection: Error on fcntl.\n");
86     }
87     #endif /* end win32 */
88    
89     if (getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, &buflen)==-1)
90     oldbufsize=0;
91     if (oldbufsize<bufsize) {
92     #ifdef ESRV_DEBUG
93     LOG(llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
94     #endif
95     if(setsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&bufsize, sizeof(&bufsize))) {
96     LOG(llevError,"InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
97     }
98     }
99     buflen=sizeof(oldbufsize);
100     getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, &buflen);
101     #ifdef ESRV_DEBUG
102     LOG(llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
103     #endif
104    
105     ns->faceset = 0;
106     ns->facecache = 0;
107     ns->image2 = 0;
108     ns->sound = 0;
109     ns->exp64 = 0;
110     ns->monitor_spells = 0;
111     ns->mapmode = Map0Cmd;
112     ns->darkness = 1;
113     ns->status = Ns_Add;
114     ns->comment = NULL;
115     ns->old_mode = 0;
116     ns->mapx = 11;
117     ns->mapy = 11;
118     ns->newmapcmd= 0;
119     ns->itemcmd = 1; /* Default is version item1 command*/
120     ns->ext_mapinfos=0; /*extendedmapinfo datas*/
121     ns->EMI_smooth=0;
122     ns->look_position = 0;
123     ns->update_look = 0;
124     ns->has_readable_type = 0;
125     ns->supported_readables = 0;
126    
127     /* we should really do some checking here - if total clients overflows
128     * we need to do something more intelligent, because client id's will start
129     * duplicating (not likely in normal cases, but malicous attacks that
130     * just open and close connections could get this total up.
131     */
132     ns->inbuf.len=0;
133     ns->inbuf.buf=malloc( sizeof( unsigned char ) * MAXSOCKBUF );
134     /* Basic initialization. Needed because we do a check in
135     * HandleClient for oldsocketmode without checking the
136     * length of data.
137     */
138     memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF );
139     memset(&ns->lastmap,0,sizeof(struct Map));
140     memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent));
141     memset(&ns->anims_sent,0,sizeof(ns->anims_sent));
142     memset(&ns->stats,0,sizeof(struct statsinfo));
143     /* Do this so we don't send a face command for the client for
144     * this face. Face 0 is sent to the client to say clear
145     * face information.
146     */
147     ns->faces_sent[0] = NS_FACESENT_FACE;
148    
149     ns->outputbuffer.start=0;
150     ns->outputbuffer.len=0;
151     ns->can_write=1;
152     ns->password_fails = 0;
153    
154     ns->sent_scroll=0;
155     ns->host=strdup_local(from_ip);
156     sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO);
157     sl.buf=buf;
158     sl.len=strlen((char*)buf);
159     Send_With_Handling(ns, &sl);
160     #ifdef CS_LOGSTATS
161     if (socket_info.nconns>cst_tot.max_conn)
162     cst_tot.max_conn = socket_info.nconns;
163     if (socket_info.nconns>cst_lst.max_conn)
164     cst_lst.max_conn = socket_info.nconns;
165     #endif
166     }
167    
168    
169     /** This sets up the socket and reads all the image information into memory. */
170     void init_ericserver(void)
171     {
172     struct sockaddr_in insock;
173     struct protoent *protox;
174     struct linger linger_opt;
175    
176     #ifdef WIN32 /* ***win32 - we init a windows socket */
177     WSADATA w;
178    
179     socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */
180     WSAStartup (0x0101,&w); /* this setup all socket stuff */
181     /* ill include no error tests here, winsocket 1.1 should always work */
182     /* except some old win95 versions without tcp/ip stack */
183     #else /* non windows */
184    
185     #ifdef HAVE_SYSCONF
186     socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX);
187     #else
188     # ifdef HAVE_GETDTABLESIZE
189     socket_info.max_filedescriptor = getdtablesize();
190     # else
191     "Unable to find usable function to get max filedescriptors";
192     # endif
193     #endif
194     #endif /* win32 */
195    
196     socket_info.timeout.tv_sec = 0;
197     socket_info.timeout.tv_usec = 0;
198     socket_info.nconns=0;
199    
200     #ifdef CS_LOGSTATS
201     memset(&cst_tot, 0, sizeof(CS_Stats));
202     memset(&cst_lst, 0, sizeof(CS_Stats));
203     cst_tot.time_start=time(NULL);
204     cst_lst.time_start=time(NULL);
205     #endif
206    
207     LOG(llevDebug,"Initialize new client/server data\n");
208     socket_info.nconns = 1;
209     init_sockets = malloc(sizeof(NewSocket));
210     init_sockets[0].faces_sent = NULL; /* unused */
211     socket_info.allocated_sockets=1;
212    
213     protox = getprotobyname("tcp");
214     if (protox==NULL) {
215     LOG(llevError,"init_ericserver: Error getting protox\n");
216     return;
217     }
218     init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto);
219     if (init_sockets[0].fd == -1) {
220     LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno));
221     exit(-1);
222     }
223     insock.sin_family = AF_INET;
224     insock.sin_port = htons(settings.csport);
225     insock.sin_addr.s_addr = htonl(INADDR_ANY);
226    
227     linger_opt.l_onoff = 0;
228     linger_opt.l_linger = 0;
229     if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt,
230     sizeof(struct linger))) {
231     LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno));
232     }
233     /* Would be nice to have an autoconf check for this. It appears that
234     * these functions are both using the same calling syntax, just one
235     * of them needs extra valus passed.
236     */
237     #if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
238     defined(__sun__) || defined(__linux__) || defined(SVR4) || \
239     defined(__FreeBSD__) || defined(__OpenBSD__) || \
240     defined(WIN32) /* ---win32 add this here */ || \
241     defined(__GNU__) /* HURD */
242     {
243     #ifdef WIN32
244     char tmp = 1;
245     #else
246     int tmp =1;
247     #endif
248    
249     if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) {
250     LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
251     }
252     }
253     #else
254     if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) {
255     LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
256     }
257     #endif
258    
259     if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) {
260     LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno));
261     #ifdef WIN32 /* ***win32: close() -> closesocket() */
262     shutdown(init_sockets[0].fd,SD_BOTH);
263     closesocket(init_sockets[0].fd);
264     #else
265     close(init_sockets[0].fd);
266     #endif /* win32 */
267     exit(-1);
268     }
269     if (listen(init_sockets[0].fd,5) == (-1)) {
270     LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno));
271     #ifdef WIN32 /* ***win32: close() -> closesocket() */
272     shutdown(init_sockets[0].fd,SD_BOTH);
273     closesocket(init_sockets[0].fd);
274     #else
275     close(init_sockets[0].fd);
276     #endif /* win32 */
277     exit(-1);
278     }
279     init_sockets[0].status=Ns_Add;
280     read_client_images();
281     }
282    
283    
284     /*******************************************************************************
285     *
286     * Start of functions dealing with freeing of the data.
287     *
288     ******************************************************************************/
289    
290     /** Free's all the memory that ericserver allocates. */
291     void free_all_newserver(void)
292     {
293     LOG(llevDebug,"Freeing all new client/server information.\n");
294     free_socket_images();
295     free(init_sockets);
296     }
297    
298     /**
299     * Frees a socket.
300     * Basically, all we need to do here is free all data structures that
301     * might be associated with the socket. It is up to the caller to
302     * update the list
303     */
304    
305     void free_newsocket(NewSocket *ns)
306     {
307     #ifdef WIN32 /* ***win32: closesocket in windows style */
308     shutdown(ns->fd,SD_BOTH);
309     if (closesocket(ns->fd)) {
310     #else
311     if (close(ns->fd)) {
312     #endif /* win32 */
313    
314     #ifdef ESRV_DEBUG
315     LOG(llevDebug,"Error closing socket %d\n", ns->fd);
316     #endif
317     }
318     if (ns->stats.range)
319     free(ns->stats.range);
320     if (ns->stats.title)
321     free(ns->stats.title);
322     if (ns->comment)
323     free(ns->comment);
324     free(ns->host);
325     free(ns->inbuf.buf);
326     }
327    
328     /** Sends the 'goodbye' command to the player, and closes connection. */
329     void final_free_player(player *pl)
330     {
331     cs_write_string(&pl->socket, "goodbye", 8);
332     free_newsocket(&pl->socket);
333     free_player(pl);
334     }
335