1 |
/* |
2 |
CrossFire, A Multiplayer game for X-windows |
3 |
|
4 |
Copyright (C) 2001 Mark Wedel |
5 |
Copyright (C) 1992 Frank Tore Johansen |
6 |
|
7 |
This program is free software; you can redistribute it and/or modify |
8 |
it under the terms of the GNU General Public License as published by |
9 |
the Free Software Foundation; either version 2 of the License, or |
10 |
(at your option) any later version. |
11 |
|
12 |
This program is distributed in the hope that it will be useful, |
13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
GNU General Public License for more details. |
16 |
|
17 |
You should have received a copy of the GNU General Public License |
18 |
along with this program; if not, write to the Free Software |
19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
|
21 |
The author can be reached via e-mail to <crossfire@schmorp.de> |
22 |
*/ |
23 |
|
24 |
/** |
25 |
* \file |
26 |
* Socket general functions |
27 |
* |
28 |
* \date 2003-12-02 |
29 |
* |
30 |
* Mainly deals with initialization and higher level socket |
31 |
* maintenance (checking for lost connections and if data has arrived.) |
32 |
* The reading of data is handled in ericserver.c |
33 |
*/ |
34 |
|
35 |
|
36 |
#include <global.h> |
37 |
#include <sproto.h> |
38 |
#include <sys/types.h> |
39 |
#include <sys/time.h> |
40 |
#include <sys/socket.h> |
41 |
#include <netinet/in.h> |
42 |
#include <netdb.h> |
43 |
|
44 |
#ifdef HAVE_UNISTD_H |
45 |
# include <unistd.h> |
46 |
#endif |
47 |
|
48 |
#ifdef HAVE_ARPA_INET_H |
49 |
# include <arpa/inet.h> |
50 |
#endif |
51 |
#include <newserver.h> |
52 |
|
53 |
Socket_Info socket_info; |
54 |
NewSocket *init_sockets; |
55 |
|
56 |
/** |
57 |
* Initializes a connection. Really, it just sets up the data structure, |
58 |
* socket setup is handled elsewhere. We do send a version to the |
59 |
* client. |
60 |
*/ |
61 |
void |
62 |
InitConnection (NewSocket *ns, const char *from_ip) |
63 |
{ |
64 |
int bufsize = 65535; /*Supposed absolute upper limit */ |
65 |
int oldbufsize; |
66 |
int buflen = sizeof (int); |
67 |
|
68 |
if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) |
69 |
LOG (llevError, "InitConnection: Error on fcntl.\n"); |
70 |
|
71 |
if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
72 |
oldbufsize = 0; |
73 |
|
74 |
if (oldbufsize < bufsize) |
75 |
if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
76 |
LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
77 |
|
78 |
buflen = sizeof (oldbufsize); |
79 |
getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
80 |
#ifdef ESRV_DEBUG |
81 |
LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
82 |
#endif |
83 |
|
84 |
ns->faceset = 0; |
85 |
ns->facecache = 0; |
86 |
ns->image2 = 0; |
87 |
ns->sound = 0; |
88 |
ns->exp64 = 0; |
89 |
ns->monitor_spells = 0; |
90 |
ns->mapmode = Map0Cmd; |
91 |
ns->darkness = 1; |
92 |
ns->status = Ns_Add; |
93 |
ns->mapx = 11; |
94 |
ns->mapy = 11; |
95 |
ns->newmapcmd = 0; |
96 |
ns->itemcmd = 1; /* Default is version item1 command */ |
97 |
ns->ext_mapinfos = 0; /*extendedmapinfo datas */ |
98 |
ns->EMI_smooth = 0; |
99 |
ns->look_position = 0; |
100 |
ns->update_look = 0; |
101 |
ns->has_readable_type = 0; |
102 |
ns->supported_readables = 0; |
103 |
ns->monitor_spells = 0; |
104 |
ns->mapinfocmd = 0; |
105 |
ns->extcmd = 0; |
106 |
ns->extmap = 0; |
107 |
|
108 |
/* we should really do some checking here - if total clients overflows |
109 |
* we need to do something more intelligent, because client id's will start |
110 |
* duplicating (not likely in normal cases, but malicous attacks that |
111 |
* just open and close connections could get this total up. |
112 |
*/ |
113 |
ns->inbuf_len = 0; |
114 |
|
115 |
/* Basic initialization. Needed because we do a check in |
116 |
* HandleClient for oldsocketmode without checking the |
117 |
* length of data. |
118 |
*/ |
119 |
memset (&ns->lastmap, 0, sizeof (struct Map)); |
120 |
memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent)); |
121 |
memset (&ns->anims_sent, 0, sizeof (ns->anims_sent)); |
122 |
memset (&ns->stats, 0, sizeof (struct statsinfo)); |
123 |
/* Do this so we don't send a face command for the client for |
124 |
* this face. Face 0 is sent to the client to say clear |
125 |
* face information. |
126 |
*/ |
127 |
ns->faces_sent[0] = NS_FACESENT_FACE; |
128 |
|
129 |
ns->outputbuffer.start = 0; |
130 |
ns->outputbuffer.len = 0; |
131 |
ns->can_write = 1; |
132 |
ns->password_fails = 0; |
133 |
|
134 |
ns->current_map = 0; |
135 |
ns->current_x = 0; |
136 |
ns->current_y = 0; |
137 |
ns->client[0] = 0; |
138 |
ns->buggy_mapscroll = 0; |
139 |
|
140 |
ns->sent_scroll = 0; |
141 |
ns->host = strdup_local (from_ip); |
142 |
|
143 |
{ |
144 |
SockList sl (MAXSOCKBUF); |
145 |
|
146 |
sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
147 |
Send_With_Handling (ns, &sl); |
148 |
sl.free (); |
149 |
} |
150 |
|
151 |
#ifdef CS_LOGSTATS |
152 |
if (socket_info.nconns > cst_tot.max_conn) |
153 |
cst_tot.max_conn = socket_info.nconns; |
154 |
if (socket_info.nconns > cst_lst.max_conn) |
155 |
cst_lst.max_conn = socket_info.nconns; |
156 |
#endif |
157 |
} |
158 |
|
159 |
|
160 |
/** This sets up the socket and reads all the image information into memory. */ |
161 |
void |
162 |
init_ericserver (void) |
163 |
{ |
164 |
struct sockaddr_in insock; |
165 |
struct protoent *protox; |
166 |
struct linger linger_opt; |
167 |
|
168 |
socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
169 |
|
170 |
socket_info.timeout.tv_sec = 0; |
171 |
socket_info.timeout.tv_usec = 0; |
172 |
socket_info.nconns = 0; |
173 |
|
174 |
#ifdef CS_LOGSTATS |
175 |
memset (&cst_tot, 0, sizeof (CS_Stats)); |
176 |
memset (&cst_lst, 0, sizeof (CS_Stats)); |
177 |
cst_tot.time_start = time (NULL); |
178 |
cst_lst.time_start = time (NULL); |
179 |
#endif |
180 |
|
181 |
LOG (llevDebug, "Initialize new client/server data\n"); |
182 |
socket_info.nconns = 1; |
183 |
init_sockets = (NewSocket *) malloc (sizeof (NewSocket)); |
184 |
init_sockets[0].faces_sent = NULL; /* unused */ |
185 |
socket_info.allocated_sockets = 1; |
186 |
|
187 |
protox = getprotobyname ("tcp"); |
188 |
if (protox == NULL) |
189 |
{ |
190 |
LOG (llevError, "init_ericserver: Error getting protox\n"); |
191 |
return; |
192 |
} |
193 |
|
194 |
init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
195 |
if (init_sockets[0].fd == -1) |
196 |
{ |
197 |
LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
198 |
exit (-1); |
199 |
} |
200 |
|
201 |
insock.sin_family = AF_INET; |
202 |
insock.sin_port = htons (settings.csport); |
203 |
insock.sin_addr.s_addr = htonl (INADDR_ANY); |
204 |
|
205 |
linger_opt.l_onoff = 0; |
206 |
linger_opt.l_linger = 0; |
207 |
if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
208 |
LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
209 |
|
210 |
{ |
211 |
int tmp = 1; |
212 |
|
213 |
if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
214 |
LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
215 |
} |
216 |
|
217 |
if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
218 |
{ |
219 |
LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
220 |
close (init_sockets[0].fd); |
221 |
exit (-1); |
222 |
} |
223 |
|
224 |
if (listen (init_sockets[0].fd, 5) == (-1)) |
225 |
{ |
226 |
LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
227 |
close (init_sockets[0].fd); |
228 |
exit (-1); |
229 |
} |
230 |
|
231 |
init_sockets[0].status = Ns_Add; |
232 |
read_client_images (); |
233 |
} |
234 |
|
235 |
|
236 |
/******************************************************************************* |
237 |
* |
238 |
* Start of functions dealing with freeing of the data. |
239 |
* |
240 |
******************************************************************************/ |
241 |
|
242 |
/** Free's all the memory that ericserver allocates. */ |
243 |
void |
244 |
free_all_newserver (void) |
245 |
{ |
246 |
LOG (llevDebug, "Freeing all new client/server information.\n"); |
247 |
free_socket_images (); |
248 |
free (init_sockets); |
249 |
} |
250 |
|
251 |
/** |
252 |
* Frees a socket. |
253 |
* Basically, all we need to do here is free all data structures that |
254 |
* might be associated with the socket. It is up to the caller to |
255 |
* update the list |
256 |
*/ |
257 |
|
258 |
void |
259 |
free_newsocket (NewSocket *ns) |
260 |
{ |
261 |
close (ns->fd); |
262 |
|
263 |
if (ns->stats.range) |
264 |
free (ns->stats.range); |
265 |
|
266 |
if (ns->stats.title) |
267 |
free (ns->stats.title); |
268 |
|
269 |
free (ns->host); |
270 |
} |
271 |
|
272 |
/** Sends the 'goodbye' command to the player, and closes connection. */ |
273 |
void |
274 |
final_free_player (player *pl) |
275 |
{ |
276 |
pl->socket.send_packet ("goodbye"); |
277 |
free_newsocket (&pl->socket); |
278 |
free_player (pl); |
279 |
} |
280 |
|