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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.8 by root, Thu Sep 14 22:34:05 2006 UTC vs.
Revision 1.52 by root, Mon Oct 1 01:09:10 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
4 Copyright (C) 2001 Mark Wedel 5 * Copyright (©) 2001,2007 Mark Wedel
5 Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
6 7 *
7 This program is free software; you can redistribute it and/or modify 8 * Crossfire TRT 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 * 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 * the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version. 11 * (at your option) any later version.
11 12 *
12 This program is distributed in the hope that it will be useful, 13 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 16 * GNU General Public License for more details.
16 17 *
17 You should have received a copy of the GNU General Public License 18 * 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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 *
20
21 The author can be reached via e-mail to <crossfire@schmorp.de> 21 * The authors can be reached via e-mail to <crossfire@schmorp.de>
22*/ 22 */
23 23
24/** 24/**
25 * \file 25 * \file
26 * Socket general functions 26 * Socket general functions
27 * 27 *
… …
30 * Mainly deals with initialization and higher level socket 30 * Mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 31 * maintenance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c 32 * The reading of data is handled in ericserver.c
33 */ 33 */
34 34
35
36#include <global.h> 35#include <global.h>
37#ifndef __CEXTRACT__
38# include <sproto.h> 36#include <sproto.h>
39#endif
40#ifndef WIN32 /* ---win32 exclude include files */
41# include <sys/types.h> 37#include <sys/types.h>
42# include <sys/time.h> 38#include <sys/time.h>
43# include <sys/socket.h> 39#include <sys/socket.h>
44# include <netinet/in.h> 40#include <netinet/in.h>
41#include <netinet/tcp.h>
42#include <netinet/ip.h>
45# include <netdb.h> 43#include <netdb.h>
46#endif /* win32 */
47 44
48#ifdef HAVE_UNISTD_H
49# include <unistd.h> 45#include <unistd.h>
50#endif
51
52#ifdef HAVE_ARPA_INET_H
53# include <arpa/inet.h> 46#include <arpa/inet.h>
54#endif
55#include <newserver.h>
56 47
57Socket_Info socket_info; 48#include <algorithm>
58NewSocket *init_sockets; 49
50// use relatively small values, as we do not expect to receive much,
51// and we do userspace write buffering
52// 8kb limits throughput to roughly 66kb/s
53#define SOCKET_RCVBUF 8192
54#define SOCKET_SNDBUF 16384
55
56sockvec clients;
59 57
60/** 58/**
61 * Initializes a connection. Really, it just sets up the data structure, 59 * Initializes a connection. Really, it just sets up the data structure,
62 * socket setup is handled elsewhere. We do send a version to the 60 * socket setup is handled elsewhere. We do send a version to the
63 * client. 61 * client.
64 */ 62 */
65void 63client::client (int fd, const char *peername)
66InitConnection (NewSocket * ns, const char *from_ip) 64: fd (fd), host (strdup (peername)),
65 socket_ev (this, &client::socket_cb)
67{ 66{
68 SockList sl; 67 refcnt_inc (); // the socket is an external reference
69 char buf[256]; 68
69 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
70
71 {
72 struct linger linger_opt;
73
74 linger_opt.l_onoff = 0;
75 linger_opt.l_linger = 0;
76
77 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
78 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
79 }
80
81 {
82 int val;
83
84#ifdef SO_RCVBUF
85 val = SOCKET_RCVBUF;
86 if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
87 LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
88#endif
89
90#ifdef SO_SNDBUF
91 val = SOCKET_SNDBUF;
92 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
93 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
94#endif
95
96#ifdef IP_TOS
97 val = IPTOS_LOWDELAY;
98 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
99 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
100#endif
101
102#ifdef TCP_NODELAY
103 val = 1;
104 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
105 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
106#endif
107
108 // set some very aggressive keepalive parameters
109#ifdef TCP_KEEPIDLE
110 val = 1;
111 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
112 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
113#endif
114
115#ifdef TCP_KEEPCNT
116 val = 3;
117 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
118 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
119#endif
120
121#ifdef TCP_KEEPINTVL
122 val = 1;
123 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
124 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
125#endif
126
127 // try to find the mss value in use
128#ifdef TCP_MAXSEG
129 socklen_t sl = sizeof (val);
130 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
131 mss = val;
132#endif
133 }
134
135 {
70 int bufsize = 65535; /*Supposed absolute upper limit */ 136 int bufsize = 65535; /*Supposed absolute upper limit */
71 int oldbufsize; 137 int oldbufsize;
72 int buflen = sizeof (int); 138 int buflen = sizeof (int);
73 139
74#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */
75 int temp = 1;
76
77 if (ioctlsocket (ns->fd, FIONBIO, &temp) == -1)
78 LOG (llevError, "InitConnection: Error on ioctlsocket.\n");
79#else
80 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 140 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
81 {
82 LOG (llevError, "InitConnection: Error on fcntl.\n"); 141 LOG (llevError, "InitConnection: Error on fcntl.\n");
83 }
84#endif /* end win32 */
85 142
86 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 143 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
87 oldbufsize = 0; 144 oldbufsize = 0;
145
88 if (oldbufsize < bufsize) 146 if (oldbufsize < bufsize)
89 {
90#ifdef ESRV_DEBUG
91 LOG (llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
92#endif
93 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 147 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
94 {
95 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); 148 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
96 } 149
97 }
98 buflen = sizeof (oldbufsize); 150 buflen = sizeof (oldbufsize);
99 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 151 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
100#ifdef ESRV_DEBUG 152 }
101 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
102#endif
103 153
104 ns->faceset = 0; 154 state = ST_SETUP;
105 ns->facecache = 0;
106 ns->image2 = 0;
107 ns->sound = 0;
108 ns->exp64 = 0;
109 ns->monitor_spells = 0;
110 ns->mapmode = Map0Cmd; 155 mapmode = Map0Cmd;
111 ns->darkness = 1; 156 darkness = 1;
112 ns->status = Ns_Add;
113 ns->comment = NULL;
114 ns->old_mode = (Old_Mode) 0;
115 ns->mapx = 11; 157 mapx = 11;
116 ns->mapy = 11; 158 mapy = 11;
117 ns->newmapcmd = 0;
118 ns->itemcmd = 1; /* Default is version item1 command */ 159 itemcmd = 1; /* Default is version item1 command */
119 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 160 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
120 ns->EMI_smooth = 0;
121 ns->look_position = 0;
122 ns->update_look = 0;
123 ns->has_readable_type = 0;
124 ns->supported_readables = 0;
125 ns->monitor_spells = 0;
126 ns->mapinfocmd = 0;
127 ns->extcmd = 0;
128 ns->extmap = 0;
129 161
130 /* we should really do some checking here - if total clients overflows
131 * we need to do something more intelligent, because client id's will start
132 * duplicating (not likely in normal cases, but malicous attacks that
133 * just open and close connections could get this total up.
134 */
135 ns->inbuf.len = 0;
136 ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF);
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 162 /* 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 163 * this face. Face 0 is sent to the client to say clear
148 * face information. 164 * face information.
149 */ 165 */
150 ns->faces_sent[0] = NS_FACESENT_FACE; 166 faces_sent[0] = true;
167 fx_want [FT_FACE] = true; // all clients must support image faces
151 168
152 ns->outputbuffer.start = 0; 169 socket_ev.prio (PE_PRIO_HIGH);
153 ns->outputbuffer.len = 0; 170 socket_ev.fd (fd);
154 ns->can_write = 1; 171 socket_ev.poll (PE_R);
155 ns->password_fails = 0;
156 172
157 ns->current_map = 0; 173 // initialisation done, kick it!
158 ns->current_x = 0;
159 ns->current_y = 0;
160 ns->client[0] = 0;
161 ns->buggy_mapscroll = 0;
162
163 ns->sent_scroll = 0;
164 ns->host = strdup_local (from_ip);
165 sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 174 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
166 sl.buf = (unsigned char *) buf; 175 flush ();
167 sl.len = strlen ((char *) buf);
168 Send_With_Handling (ns, &sl);
169#ifdef CS_LOGSTATS
170 if (socket_info.nconns > cst_tot.max_conn)
171 cst_tot.max_conn = socket_info.nconns;
172 if (socket_info.nconns > cst_lst.max_conn)
173 cst_lst.max_conn = socket_info.nconns;
174#endif
175}
176 176
177 reset_stats ();
177 178
178/** This sets up the socket and reads all the image information into memory. */ 179 clients.insert (this);
180}
181
182client::~client ()
183{
184 clients.erase (this);
185
186 mapinfo_queue_clear ();
187 free (stats.range);
188 free (stats.title);
189 free (host);
190}
191
179void 192void
180init_ericserver (void) 193client::do_destroy ()
181{ 194{
182 struct sockaddr_in insock; 195 attachable::do_destroy ();
183 struct protoent *protox;
184 struct linger linger_opt;
185 196
186#ifdef WIN32 /* ***win32 - we init a windows socket */ 197 if (pl)
187 WSADATA w; 198 pl->disconnect ();
188 199
189 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */ 200 if (fd >= 0)
190 WSAStartup (0x0101, &w); /* this setup all socket stuff */
191 /* ill include no error tests here, winsocket 1.1 should always work */
192 /* except some old win95 versions without tcp/ip stack */
193#else /* non windows */
194
195# ifdef HAVE_SYSCONF
196 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
197# else
198# ifdef HAVE_GETDTABLESIZE
199 socket_info.max_filedescriptor = getdtablesize ();
200# else
201 "Unable to find usable function to get max filedescriptors";
202# endif
203# endif
204#endif /* win32 */
205
206 socket_info.timeout.tv_sec = 0;
207 socket_info.timeout.tv_usec = 0;
208 socket_info.nconns = 0;
209
210#ifdef CS_LOGSTATS
211 memset (&cst_tot, 0, sizeof (CS_Stats));
212 memset (&cst_lst, 0, sizeof (CS_Stats));
213 cst_tot.time_start = time (NULL);
214 cst_lst.time_start = time (NULL);
215#endif
216
217 LOG (llevDebug, "Initialize new client/server data\n");
218 socket_info.nconns = 1;
219 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
220 init_sockets[0].faces_sent = NULL; /* unused */
221 socket_info.allocated_sockets = 1;
222
223 protox = getprotobyname ("tcp");
224 if (protox == NULL)
225 { 201 {
226 LOG (llevError, "init_ericserver: Error getting protox\n"); 202 send_packet ("goodbye");
227 return; 203 flush ();
204
205 close (fd);
228 } 206 }
229 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
230 if (init_sockets[0].fd == -1)
231 {
232 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
233 exit (-1);
234 }
235 insock.sin_family = AF_INET;
236 insock.sin_port = htons (settings.csport);
237 insock.sin_addr.s_addr = htonl (INADDR_ANY);
238 207
239 linger_opt.l_onoff = 0; 208 state = ST_DEAD;
240 linger_opt.l_linger = 0;
241 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
242 {
243 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
244 }
245 209
246/* Would be nice to have an autoconf check for this. It appears that 210 socket_ev.suspend ();
247 * these functions are both using the same calling syntax, just one
248 * of them needs extra valus passed.
249 */
250#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
251 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
252 defined(__FreeBSD__) || defined(__OpenBSD__) || \
253 defined(WIN32) /* ---win32 add this here */ || \
254 defined(__GNU__) /* HURD */
255 {
256# ifdef WIN32
257 char tmp = 1;
258# else
259 int tmp = 1;
260# endif
261 211
262 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) 212 refcnt_dec (); // socket no longer open
263 {
264 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
265 }
266 }
267#else
268 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0))
269 {
270 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
271 }
272#endif
273
274 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
275 {
276 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
277#ifdef WIN32 /* ***win32: close() -> closesocket() */
278 shutdown (init_sockets[0].fd, SD_BOTH);
279 closesocket (init_sockets[0].fd);
280#else
281 close (init_sockets[0].fd);
282#endif /* win32 */
283 exit (-1);
284 }
285 if (listen (init_sockets[0].fd, 5) == (-1))
286 {
287 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
288#ifdef WIN32 /* ***win32: close() -> closesocket() */
289 shutdown (init_sockets[0].fd, SD_BOTH);
290 closesocket (init_sockets[0].fd);
291#else
292 close (init_sockets[0].fd);
293#endif /* win32 */
294 exit (-1);
295 }
296 init_sockets[0].status = Ns_Add;
297 read_client_images ();
298} 213}
299 214
300
301/*******************************************************************************
302 *
303 * Start of functions dealing with freeing of the data.
304 *
305 ******************************************************************************/
306
307/** Free's all the memory that ericserver allocates. */
308void 215void
309free_all_newserver (void) 216client::reset_stats ()
310{ 217{
311 LOG (llevDebug, "Freeing all new client/server information.\n"); 218 /* we need to clear these to -1 and not zero - otherwise,
312 free_socket_images (); 219 * if a player quits and starts a new character, we wont
313 free (init_sockets); 220 * send new values to the client, as things like exp start
314} 221 * at zero.
315
316/**
317 * Frees a socket.
318 * Basically, all we need to do here is free all data structures that
319 * might be associated with the socket. It is up to the caller to
320 * update the list
321 */ 222 */
223 for (int i = 0; i < NUM_SKILLS; i++)
224 last_skill_exp[i] = -1;
322 225
323void 226 for (int i = 0; i < NROFATTACKS; i++)
324free_newsocket (NewSocket * ns) 227 last_resist[i] = -1;
325{
326#ifdef WIN32 /* ***win32: closesocket in windows style */
327 shutdown (ns->fd, SD_BOTH);
328 if (closesocket (ns->fd))
329 {
330#else
331 if (close (ns->fd))
332 {
333#endif /* win32 */
334 228
335#ifdef ESRV_DEBUG 229 last_weapon_sp = -1;
336 LOG (llevDebug, "Error closing socket %d\n", ns->fd); 230 last_level = -1;
337#endif 231 last_stats.exp = -1;
338 } 232 last_weight = (uint32) - 1;
339 if (ns->stats.range) 233 last_flags = 0;
340 free (ns->stats.range); 234 last_weight = 0;
341 if (ns->stats.title) 235 last_weight_limit = 0;
342 free (ns->stats.title); 236 last_path_attuned = 0;
343 if (ns->comment) 237 last_path_repelled = 0;
344 free (ns->comment); 238 last_path_denied = 0;
345 free (ns->host); 239 last_speed = 0;
346 free (ns->inbuf.buf); 240 last_flags = 0;
347}
348 241
349/** Sends the 'goodbye' command to the player, and closes connection. */ 242 static living zero_living;
350void 243 last_stats = zero_living;
351final_free_player (player *pl)
352{
353 cs_write_string (&pl->socket, "goodbye", 8);
354 free_newsocket (&pl->socket);
355 free_player (pl);
356} 244}
245
246client *
247client::create (int fd, const char *peername)
248{
249 client *ns = new client (dup (fd), peername);
250 ns->instantiate (); // effectively a nop right now
251 INVOKE_CLIENT (CONNECT, ns);
252 return ns;
253}
254

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