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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.1 by elmex, Sun Aug 13 17:16:05 2006 UTC vs.
Revision 1.47 by root, Sat Jun 9 22:54:03 2007 UTC

1/* 1/*
2 * static char *rcsid_init_c = 2 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game.
3 * "$Id: init.C,v 1.1 2006/08/13 17:16:05 elmex Exp $"; 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
5 * Copyright (©) 2001,2007 Mark Wedel
6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 *
8 * Crossfire TRT is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51
20 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 * The authors can be reached via e-mail to <crossfire@schmorp.de>
4 */ 23 */
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 24
29/** 25/**
30 * \file 26 * \file
31 * Socket general functions 27 * Socket general functions
32 * 28 *
… …
35 * Mainly deals with initialization and higher level socket 31 * Mainly deals with initialization and higher level socket
36 * maintenance (checking for lost connections and if data has arrived.) 32 * maintenance (checking for lost connections and if data has arrived.)
37 * The reading of data is handled in ericserver.c 33 * The reading of data is handled in ericserver.c
38 */ 34 */
39 35
40
41#include <global.h> 36#include <global.h>
42#ifndef __CEXTRACT__
43#include <sproto.h> 37#include <sproto.h>
44#endif
45#ifndef WIN32 /* ---win32 exclude include files */
46#include <sys/types.h> 38#include <sys/types.h>
47#include <sys/time.h> 39#include <sys/time.h>
48#include <sys/socket.h> 40#include <sys/socket.h>
49#include <netinet/in.h> 41#include <netinet/in.h>
42#include <netinet/tcp.h>
43#include <netinet/ip.h>
50#include <netdb.h> 44#include <netdb.h>
51#endif /* win32 */
52 45
53#ifdef HAVE_UNISTD_H
54#include <unistd.h> 46#include <unistd.h>
55#endif
56
57#ifdef HAVE_ARPA_INET_H
58#include <arpa/inet.h> 47#include <arpa/inet.h>
59#endif
60#include <newserver.h>
61 48
62Socket_Info socket_info; 49#include <algorithm>
63NewSocket *init_sockets; 50
51sockvec clients;
64 52
65/** 53/**
66 * Initializes a connection. Really, it just sets up the data structure, 54 * Initializes a connection. Really, it just sets up the data structure,
67 * socket setup is handled elsewhere. We do send a version to the 55 * socket setup is handled elsewhere. We do send a version to the
68 * client. 56 * client.
69 */ 57 */
70void InitConnection(NewSocket *ns, const char *from_ip) 58client::client (int fd, const char *peername)
59: fd (fd), host (strdup (peername)),
60 socket_ev (this, &client::socket_cb),
61 cmd_ev (this, &client::cmd_cb)
71{ 62{
72 SockList sl; 63 refcnt_inc (); // the socket is an external reference
73 char buf[256]; 64
65 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
66
67 {
68 struct linger linger_opt;
69
70 linger_opt.l_onoff = 0;
71 linger_opt.l_linger = 0;
72
73 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
74 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
75 }
76
77 {
78 int val;
79
80#ifdef IP_TOS
81 val = IPTOS_LOWDELAY;
82 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
83 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
84#endif
85
86#ifdef TCP_NODELAY
87 val = 1;
88 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
89 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
90#endif
91
92 // set some very aggressive keepalive parameters
93#ifdef TCP_KEEPIDLE
94 val = 1;
95 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
96 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
97#endif
98
99#ifdef TCP_KEEPCNT
100 val = 3;
101 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
102 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
103#endif
104
105#ifdef TCP_KEEPINTVL
106 val = 1;
107 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
108 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
109#endif
110
111 // try to find the mss value in use
112#ifdef TCP_MAXSEG
113 socklen_t sl = sizeof (val);
114 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
115 mss = val;
116#endif
117 }
118
119 {
74 int bufsize=65535; /*Supposed absolute upper limit */ 120 int bufsize = 65535; /*Supposed absolute upper limit */
75 int oldbufsize; 121 int oldbufsize;
76 int buflen=sizeof(int); 122 int buflen = sizeof (int);
77 123
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) { 124 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
85 LOG(llevError,"InitConnection: Error on fcntl.\n"); 125 LOG (llevError, "InitConnection: Error on fcntl.\n");
126
127 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
128 oldbufsize = 0;
129
130 if (oldbufsize < bufsize)
131 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
132 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
133
134 buflen = sizeof (oldbufsize);
135 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
136 }
137
138 state = ST_SETUP;
139 mapmode = Map0Cmd;
140 darkness = 1;
141 mapx = 11;
142 mapy = 11;
143 itemcmd = 1; /* Default is version item1 command */
144 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
145
146 /* Do this so we don't send a face command for the client for
147 * this face. Face 0 is sent to the client to say clear
148 * face information.
149 */
150 faces_sent[0] = true;
151
152 socket_ev.prio (PE_PRIO_NORMAL);
153 socket_ev.fd (fd);
154 socket_ev.poll (PE_R);
155
156 cmd_ev.prio (PE_PRIO_NORMAL);
157
158 // initialisation done, kick it!
159 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
160 flush ();
161
162 reset_stats ();
163
164 clients.insert (this);
165}
166
167client::~client ()
168{
169 clients.erase (this);
170
171 free (stats.range);
172 free (stats.title);
173 free (host);
174}
175
176void
177client::do_destroy ()
178{
179 attachable::do_destroy ();
180
181 if (pl)
182 pl->disconnect ();
183
184 if (fd >= 0)
185 {
186 send_packet ("goodbye");
187 flush ();
188
189 close (fd);
86 } 190 }
87#endif /* end win32 */
88 191
89 if (getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, (socklen_t*) &buflen)==-1) 192 state = ST_DEAD;
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, (socklen_t*) &buflen);
101#ifdef ESRV_DEBUG
102 LOG(llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
103#endif
104 193
105 ns->faceset = 0; 194 socket_ev.suspend ();
106 ns->facecache = 0; 195 cmd_ev.suspend ();
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 = (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 ns->monitor_spells = 0;
127 ns->mapinfocmd = 0;
128 ns->extcmd = 0;
129 196
130 /* we should really do some checking here - if total clients overflows 197 refcnt_dec (); // socket no longer open
131 * we need to do something more intelligent, because client id's will start 198}
132 * duplicating (not likely in normal cases, but malicous attacks that 199
133 * just open and close connections could get this total up. 200void
201client::reset_stats ()
202{
203 /* we need to clear these to -1 and not zero - otherwise,
204 * if a player quits and starts a new character, we wont
205 * send new values to the client, as things like exp start
206 * at zero.
134 */ 207 */
135 ns->inbuf.len=0; 208 for (int i = 0; i < NUM_SKILLS; i++)
136 ns->inbuf.buf= (unsigned char*) malloc( sizeof( unsigned char ) * MAXSOCKBUF ); 209 last_skill_exp[i] = -1;
137 /* Basic initialization. Needed because we do a check in
138 * HandleClient for oldsocketmode without checking the
139 * length of data.
140 */
141 memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF );
142 memset(&ns->lastmap,0,sizeof(struct Map));
143 memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent));
144 memset(&ns->anims_sent,0,sizeof(ns->anims_sent));
145 memset(&ns->stats,0,sizeof(struct statsinfo));
146 /* Do this so we don't send a face command for the client for
147 * this face. Face 0 is sent to the client to say clear
148 * face information.
149 */
150 ns->faces_sent[0] = NS_FACESENT_FACE;
151 210
152 ns->outputbuffer.start=0; 211 for (int i = 0; i < NROFATTACKS; i++)
153 ns->outputbuffer.len=0; 212 last_resist[i] = -1;
154 ns->can_write=1;
155 ns->password_fails = 0;
156 213
157 ns->current_map = 0; 214 last_weapon_sp = -1;
215 last_level = -1;
216 last_stats.exp = -1;
217 last_weight = (uint32) - 1;
218 last_flags = 0;
219 last_weight = 0;
220 last_weight_limit = 0;
221 last_path_attuned = 0;
222 last_path_repelled = 0;
223 last_path_denied = 0;
224 last_speed = 0;
225 last_flags = 0;
158 226
159 ns->sent_scroll=0; 227 static living zero_living;
160 ns->host=strdup_local(from_ip); 228 last_stats = zero_living;
161 sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO);
162 sl.buf=(unsigned char*)buf;
163 sl.len=strlen((char*)buf);
164 Send_With_Handling(ns, &sl);
165#ifdef CS_LOGSTATS
166 if (socket_info.nconns>cst_tot.max_conn)
167 cst_tot.max_conn = socket_info.nconns;
168 if (socket_info.nconns>cst_lst.max_conn)
169 cst_lst.max_conn = socket_info.nconns;
170#endif
171} 229}
172
173
174/** This sets up the socket and reads all the image information into memory. */
175void init_ericserver(void)
176{
177 struct sockaddr_in insock;
178 struct protoent *protox;
179 struct linger linger_opt;
180
181#ifdef WIN32 /* ***win32 - we init a windows socket */
182 WSADATA w;
183
184 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */
185 WSAStartup (0x0101,&w); /* this setup all socket stuff */
186 /* ill include no error tests here, winsocket 1.1 should always work */
187 /* except some old win95 versions without tcp/ip stack */
188#else /* non windows */
189
190#ifdef HAVE_SYSCONF
191 socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX);
192#else
193# ifdef HAVE_GETDTABLESIZE
194 socket_info.max_filedescriptor = getdtablesize();
195# else
196 "Unable to find usable function to get max filedescriptors";
197# endif
198#endif
199#endif /* win32 */
200
201 socket_info.timeout.tv_sec = 0;
202 socket_info.timeout.tv_usec = 0;
203 socket_info.nconns=0;
204
205#ifdef CS_LOGSTATS
206 memset(&cst_tot, 0, sizeof(CS_Stats));
207 memset(&cst_lst, 0, sizeof(CS_Stats));
208 cst_tot.time_start=time(NULL);
209 cst_lst.time_start=time(NULL);
210#endif
211
212 LOG(llevDebug,"Initialize new client/server data\n");
213 socket_info.nconns = 1;
214 init_sockets = (NewSocket *) malloc(sizeof(NewSocket));
215 init_sockets[0].faces_sent = NULL; /* unused */
216 socket_info.allocated_sockets=1;
217
218 protox = getprotobyname("tcp");
219 if (protox==NULL) {
220 LOG(llevError,"init_ericserver: Error getting protox\n");
221 return;
222 }
223 init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto);
224 if (init_sockets[0].fd == -1) {
225 LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno));
226 exit(-1);
227 }
228 insock.sin_family = AF_INET;
229 insock.sin_port = htons(settings.csport);
230 insock.sin_addr.s_addr = htonl(INADDR_ANY);
231
232 linger_opt.l_onoff = 0;
233 linger_opt.l_linger = 0;
234 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt,
235 sizeof(struct linger))) {
236 LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno));
237 }
238/* Would be nice to have an autoconf check for this. It appears that
239 * these functions are both using the same calling syntax, just one
240 * of them needs extra valus passed.
241 */
242#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
243 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
244 defined(__FreeBSD__) || defined(__OpenBSD__) || \
245 defined(WIN32) /* ---win32 add this here */ || \
246 defined(__GNU__) /* HURD */
247 {
248#ifdef WIN32
249 char tmp = 1;
250#else
251 int tmp =1;
252#endif
253
254 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) {
255 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
256 }
257 }
258#else
259 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) {
260 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
261 }
262#endif
263
264 if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) {
265 LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno));
266#ifdef WIN32 /* ***win32: close() -> closesocket() */
267 shutdown(init_sockets[0].fd,SD_BOTH);
268 closesocket(init_sockets[0].fd);
269#else
270 close(init_sockets[0].fd);
271#endif /* win32 */
272 exit(-1);
273 }
274 if (listen(init_sockets[0].fd,5) == (-1)) {
275 LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno));
276#ifdef WIN32 /* ***win32: close() -> closesocket() */
277 shutdown(init_sockets[0].fd,SD_BOTH);
278 closesocket(init_sockets[0].fd);
279#else
280 close(init_sockets[0].fd);
281#endif /* win32 */
282 exit(-1);
283 }
284 init_sockets[0].status=Ns_Add;
285 read_client_images();
286}
287
288 230
289/******************************************************************************* 231/*******************************************************************************
290 * 232 *
291 * Start of functions dealing with freeing of the data. 233 * Start of functions dealing with freeing of the data.
292 * 234 *
293 ******************************************************************************/ 235 ******************************************************************************/
294 236
295/** Free's all the memory that ericserver allocates. */ 237/** Free's all the memory that ericserver allocates. */
238void
296void free_all_newserver(void) 239free_all_newserver (void)
297{ 240{
298 LOG(llevDebug,"Freeing all new client/server information.\n"); 241 LOG (llevDebug, "Freeing all new client/server information.\n");
299 free_socket_images(); 242 free_socket_images ();
300 free(init_sockets);
301} 243}
302 244
303/** 245client *
304 * Frees a socket. 246client::create (int fd, const char *peername)
305 * Basically, all we need to do here is free all data structures that
306 * might be associated with the socket. It is up to the caller to
307 * update the list
308 */
309
310void free_newsocket(NewSocket *ns)
311{ 247{
312#ifdef WIN32 /* ***win32: closesocket in windows style */ 248 client *ns = new client (dup (fd), peername);
313 shutdown(ns->fd,SD_BOTH); 249 ns->instantiate (); // effectively a nop right now
314 if (closesocket(ns->fd)) { 250 INVOKE_CLIENT (CONNECT, ns);
315#else 251 return ns;
316 if (close(ns->fd)) {
317#endif /* win32 */
318
319#ifdef ESRV_DEBUG
320 LOG(llevDebug,"Error closing socket %d\n", ns->fd);
321#endif
322 }
323 if (ns->stats.range)
324 free(ns->stats.range);
325 if (ns->stats.title)
326 free(ns->stats.title);
327 if (ns->comment)
328 free(ns->comment);
329 free(ns->host);
330 free(ns->inbuf.buf);
331} 252}
332 253
333/** Sends the 'goodbye' command to the player, and closes connection. */
334void final_free_player(player *pl)
335{
336 cs_write_string(&pl->socket, "goodbye", 8);
337 free_newsocket(&pl->socket);
338 free_player(pl);
339}
340

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