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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.3 by root, Fri Aug 18 02:06:58 2006 UTC vs.
Revision 1.67 by root, Mon Apr 12 05:22:38 2010 UTC

1/* 1/*
2 * static char *rcsid_init_c = 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * "$Id: init.C,v 1.3 2006/08/18 02:06:58 root Exp $"; 3 *
4 * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 *
6 * Deliantra is free software: you can redistribute it and/or modify it under
7 * the terms of the Affero GNU General Public License as published by the
8 * Free Software Foundation, either version 3 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the Affero GNU General Public License
17 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>.
19 *
20 * The authors can be reached via e-mail to <support@deliantra.net>
4 */ 21 */
5 22
6/* 23/*
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 24 * 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 */ 25 */
39 26
40
41#include <global.h> 27#include <global.h>
42#ifndef __CEXTRACT__
43#include <sproto.h> 28#include <sproto.h>
44#endif
45#ifndef WIN32 /* ---win32 exclude include files */
46#include <sys/types.h> 29#include <sys/types.h>
47#include <sys/time.h> 30#include <sys/time.h>
48#include <sys/socket.h> 31#include <sys/socket.h>
49#include <netinet/in.h> 32#include <netinet/in.h>
33#include <netinet/tcp.h>
34#include <netinet/ip.h>
50#include <netdb.h> 35#include <netdb.h>
51#endif /* win32 */
52 36
53#ifdef HAVE_UNISTD_H
54#include <unistd.h> 37#include <unistd.h>
55#endif
56
57#ifdef HAVE_ARPA_INET_H
58#include <arpa/inet.h> 38#include <arpa/inet.h>
59#endif
60#include <newserver.h>
61 39
62Socket_Info socket_info; 40#include <algorithm>
63NewSocket *init_sockets; 41
42// use relatively small values, as we do not expect to receive much,
43// and we do userspace write buffering
44// 8kb limits throughput to roughly 66kb/s
45#define SOCKET_RCVBUF 8192
46#define SOCKET_SNDBUF 16384
47
48sockvec clients;
64 49
65/** 50/**
66 * Initializes a connection. Really, it just sets up the data structure, 51 * Initializes a connection. Really, it just sets up the data structure,
67 * socket setup is handled elsewhere. We do send a version to the 52 * socket setup is handled elsewhere. We do send a version to the
68 * client. 53 * client.
69 */ 54 */
70void InitConnection(NewSocket *ns, const char *from_ip) 55client::client (int fd, const char *peername)
56: fd (fd), host (strdup (peername)),
57 socket_ev (this, &client::socket_cb)
71{ 58{
72 SockList sl; 59 refcnt_inc (); // the socket is an external reference
73 char buf[256];
74 int bufsize=65535; /*Supposed absolute upper limit */
75 int oldbufsize;
76 int buflen=sizeof(int);
77 60
78#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */ 61 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
79 int temp = 1;
80 62
81 if(ioctlsocket(ns->fd, FIONBIO , &temp) == -1) 63 socket_timeout = 16.;
82 LOG(llevError,"InitConnection: Error on ioctlsocket.\n"); 64
83#else 65 {
66 struct linger linger_opt;
67
68 linger_opt.l_onoff = 0;
69 linger_opt.l_linger = 0;
70
71 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
72 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
73 }
74
75 {
76 int val;
77
78#ifdef SO_RCVBUF
79 val = SOCKET_RCVBUF;
80 if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
81 LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
82#endif
83
84#ifdef SO_SNDBUF
85 val = SOCKET_SNDBUF;
86 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
87 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
88#endif
89
90#ifdef IP_TOS
91 val = IPTOS_LOWDELAY;
92 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
93 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
94#endif
95
96#ifdef TCP_NODELAY
97 val = 1;
98 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
99 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
100#endif
101
102 // set some very aggressive keepalive parameters
103#ifdef TCP_KEEPIDLE
104 val = 1;
105 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
106 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
107#endif
108
109#ifdef TCP_KEEPCNT
110 val = 3;
111 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
112 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
113#endif
114
115#ifdef TCP_KEEPINTVL
116 val = 1;
117 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
118 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
119#endif
120
121 // try to find the mss value in use
122#ifdef TCP_MAXSEG
123 socklen_t sl = sizeof (val);
124 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
125 mss = val;
126#endif
127 }
128
84 if (fcntl(ns->fd, F_SETFL, O_NONBLOCK)==-1) { 129 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
85 LOG(llevError,"InitConnection: Error on fcntl.\n"); 130 LOG (llevError, "InitConnection: Error on fcntl.\n");
131
132 state = ST_SETUP;
133 mapmode = Map1aCmd;
134 mapx = 11;
135 mapy = 11;
136 itemcmd = 1; /* Default is version item1 command */
137 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
138
139 /* Do this so we don't send a face command for the client for
140 * this face. Face 0 is sent to the client to say clear
141 * face information.
142 */
143 faces_sent[0] = true;
144 fx_want [FT_FACE] = true; // all clients must support image faces
145
146 socket_ev.set (fd, EV_READ);
147 socket_ev.prio (2); // one higher than the ticker priority
148 socket_ev.start ();
149
150 // initialisation done, kick it!
151 INVOKE_CLIENT (CONNECT, this);
152
153 flush ();
154
155 reset_stats ();
156
157 clients.insert (this);
158}
159
160client::~client ()
161{
162 clients.erase (this);
163
164 mapinfo_queue_clear ();
165 free (stats.range);
166 free (stats.title);
167 free (host);
168}
169
170void
171client::do_destroy ()
172{
173 INVOKE_CLIENT (CLIENT_DESTROY, this);
174 attachable::do_destroy ();
175
176 if (pl)
177 pl->disconnect ();
178
179 if (fd >= 0)
180 {
181 send_packet ("goodbye");
182 flush ();
183
184 close (fd);
86 } 185 }
87#endif /* end win32 */
88 186
89 if (getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, (socklen_t*) &buflen)==-1) 187 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
104 188
105 ns->faceset = 0; 189 socket_ev.stop ();
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 = (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 ns->extmap = 0;
130 190
131 /* we should really do some checking here - if total clients overflows 191 refcnt_dec (); // socket no longer open
132 * we need to do something more intelligent, because client id's will start 192}
133 * duplicating (not likely in normal cases, but malicous attacks that 193
134 * just open and close connections could get this total up. 194void
195client::reset_stats ()
196{
197 /* we need to clear these to -1 and not zero - otherwise,
198 * if a player quits and starts a new character, we wont
199 * send new values to the client, as things like exp start
200 * at zero.
135 */ 201 */
136 ns->inbuf.len=0; 202 for (int i = 0; i < NUM_SKILLS; i++)
137 ns->inbuf.buf= (unsigned char*) malloc( sizeof( unsigned char ) * MAXSOCKBUF ); 203 last_skill_exp[i] = -1;
138 /* Basic initialization. Needed because we do a check in
139 * HandleClient for oldsocketmode without checking the
140 * length of data.
141 */
142 memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF );
143 memset(&ns->lastmap,0,sizeof(struct Map));
144 memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent));
145 memset(&ns->anims_sent,0,sizeof(ns->anims_sent));
146 memset(&ns->stats,0,sizeof(struct statsinfo));
147 /* Do this so we don't send a face command for the client for
148 * this face. Face 0 is sent to the client to say clear
149 * face information.
150 */
151 ns->faces_sent[0] = NS_FACESENT_FACE;
152 204
153 ns->outputbuffer.start=0; 205 for (int i = 0; i < NROFATTACKS; i++)
154 ns->outputbuffer.len=0; 206 last_resist[i] = -1;
155 ns->can_write=1;
156 ns->password_fails = 0;
157 207
158 ns->current_map = 0; 208 last_weapon_sp = -1;
159 ns->current_x = 0; 209 last_level = -1;
160 ns->current_y = 0; 210 last_stats.exp = -1;
211 last_flags = 0;
212 last_weight = -1;
213 last_weight_limit = 0;
214 last_path_attuned = 0;
215 last_path_repelled = 0;
216 last_path_denied = 0;
217 last_speed = 0;
218 last_flags = 0;
161 219
162 ns->sent_scroll=0; 220 static living zero_living;
163 ns->host=strdup_local(from_ip); 221 last_stats = zero_living;
164 sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO);
165 sl.buf=(unsigned char*)buf;
166 sl.len=strlen((char*)buf);
167 Send_With_Handling(ns, &sl);
168#ifdef CS_LOGSTATS
169 if (socket_info.nconns>cst_tot.max_conn)
170 cst_tot.max_conn = socket_info.nconns;
171 if (socket_info.nconns>cst_lst.max_conn)
172 cst_lst.max_conn = socket_info.nconns;
173#endif
174} 222}
175 223
176 224client *
177/** This sets up the socket and reads all the image information into memory. */ 225client::create (int fd, const char *peername)
178void init_ericserver(void)
179{ 226{
180 struct sockaddr_in insock; 227 client *ns = new client (dup (fd), peername);
181 struct protoent *protox;
182 struct linger linger_opt;
183 228
184#ifdef WIN32 /* ***win32 - we init a windows socket */ 229 ns->instantiate (); // effectively a nop right now
185 WSADATA w;
186 230
187 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */ 231 return ns;
188 WSAStartup (0x0101,&w); /* this setup all socket stuff */
189 /* ill include no error tests here, winsocket 1.1 should always work */
190 /* except some old win95 versions without tcp/ip stack */
191#else /* non windows */
192
193#ifdef HAVE_SYSCONF
194 socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX);
195#else
196# ifdef HAVE_GETDTABLESIZE
197 socket_info.max_filedescriptor = getdtablesize();
198# else
199 "Unable to find usable function to get max filedescriptors";
200# endif
201#endif
202#endif /* win32 */
203
204 socket_info.timeout.tv_sec = 0;
205 socket_info.timeout.tv_usec = 0;
206 socket_info.nconns=0;
207
208#ifdef CS_LOGSTATS
209 memset(&cst_tot, 0, sizeof(CS_Stats));
210 memset(&cst_lst, 0, sizeof(CS_Stats));
211 cst_tot.time_start=time(NULL);
212 cst_lst.time_start=time(NULL);
213#endif
214
215 LOG(llevDebug,"Initialize new client/server data\n");
216 socket_info.nconns = 1;
217 init_sockets = (NewSocket *) malloc(sizeof(NewSocket));
218 init_sockets[0].faces_sent = NULL; /* unused */
219 socket_info.allocated_sockets=1;
220
221 protox = getprotobyname("tcp");
222 if (protox==NULL) {
223 LOG(llevError,"init_ericserver: Error getting protox\n");
224 return;
225 }
226 init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto);
227 if (init_sockets[0].fd == -1) {
228 LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno));
229 exit(-1);
230 }
231 insock.sin_family = AF_INET;
232 insock.sin_port = htons(settings.csport);
233 insock.sin_addr.s_addr = htonl(INADDR_ANY);
234
235 linger_opt.l_onoff = 0;
236 linger_opt.l_linger = 0;
237 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt,
238 sizeof(struct linger))) {
239 LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno));
240 }
241/* Would be nice to have an autoconf check for this. It appears that
242 * these functions are both using the same calling syntax, just one
243 * of them needs extra valus passed.
244 */
245#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
246 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
247 defined(__FreeBSD__) || defined(__OpenBSD__) || \
248 defined(WIN32) /* ---win32 add this here */ || \
249 defined(__GNU__) /* HURD */
250 {
251#ifdef WIN32
252 char tmp = 1;
253#else
254 int tmp =1;
255#endif
256
257 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) {
258 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
259 }
260 }
261#else
262 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) {
263 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
264 }
265#endif
266
267 if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) {
268 LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno));
269#ifdef WIN32 /* ***win32: close() -> closesocket() */
270 shutdown(init_sockets[0].fd,SD_BOTH);
271 closesocket(init_sockets[0].fd);
272#else
273 close(init_sockets[0].fd);
274#endif /* win32 */
275 exit(-1);
276 }
277 if (listen(init_sockets[0].fd,5) == (-1)) {
278 LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno));
279#ifdef WIN32 /* ***win32: close() -> closesocket() */
280 shutdown(init_sockets[0].fd,SD_BOTH);
281 closesocket(init_sockets[0].fd);
282#else
283 close(init_sockets[0].fd);
284#endif /* win32 */
285 exit(-1);
286 }
287 init_sockets[0].status=Ns_Add;
288 read_client_images();
289} 232}
290 233
291
292/*******************************************************************************
293 *
294 * Start of functions dealing with freeing of the data.
295 *
296 ******************************************************************************/
297
298/** Free's all the memory that ericserver allocates. */
299void free_all_newserver(void)
300{
301 LOG(llevDebug,"Freeing all new client/server information.\n");
302 free_socket_images();
303 free(init_sockets);
304}
305
306/**
307 * Frees a socket.
308 * Basically, all we need to do here is free all data structures that
309 * might be associated with the socket. It is up to the caller to
310 * update the list
311 */
312
313void free_newsocket(NewSocket *ns)
314{
315#ifdef WIN32 /* ***win32: closesocket in windows style */
316 shutdown(ns->fd,SD_BOTH);
317 if (closesocket(ns->fd)) {
318#else
319 if (close(ns->fd)) {
320#endif /* win32 */
321
322#ifdef ESRV_DEBUG
323 LOG(llevDebug,"Error closing socket %d\n", ns->fd);
324#endif
325 }
326 if (ns->stats.range)
327 free(ns->stats.range);
328 if (ns->stats.title)
329 free(ns->stats.title);
330 if (ns->comment)
331 free(ns->comment);
332 free(ns->host);
333 free(ns->inbuf.buf);
334}
335
336/** Sends the 'goodbye' command to the player, and closes connection. */
337void final_free_player(player *pl)
338{
339 cs_write_string(&pl->socket, "goodbye", 8);
340 free_newsocket(&pl->socket);
341 free_player(pl);
342}
343

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