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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.10 by pippijn, Mon Dec 11 19:46:47 2006 UTC vs.
Revision 1.60 by root, Sat Dec 27 01:25:00 2008 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 3 *
4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra 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 * Deliantra 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 authors can be reached via e-mail to <support@deliantra.net>
21 The author 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#include <sys/types.h> 37#include <sys/types.h>
41#include <sys/time.h> 38#include <sys/time.h>
42#include <sys/socket.h> 39#include <sys/socket.h>
43#include <netinet/in.h> 40#include <netinet/in.h>
41#include <netinet/tcp.h>
42#include <netinet/ip.h>
44#include <netdb.h> 43#include <netdb.h>
45 44
46#ifdef HAVE_UNISTD_H
47# include <unistd.h> 45#include <unistd.h>
48#endif
49
50#ifdef HAVE_ARPA_INET_H
51# include <arpa/inet.h> 46#include <arpa/inet.h>
52#endif
53#include <newserver.h>
54 47
55Socket_Info socket_info; 48#include <algorithm>
56NewSocket *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;
57 57
58/** 58/**
59 * Initializes a connection. Really, it just sets up the data structure, 59 * Initializes a connection. Really, it just sets up the data structure,
60 * 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
61 * client. 61 * client.
62 */ 62 */
63void 63client::client (int fd, const char *peername)
64InitConnection (NewSocket * ns, const char *from_ip) 64: fd (fd), host (strdup (peername)),
65 socket_ev (this, &client::socket_cb)
65{ 66{
66 SockList sl; 67 refcnt_inc (); // the socket is an external reference
67 char buf[256];
68 int bufsize = 65535; /*Supposed absolute upper limit */
69 int oldbufsize;
70 int buflen = sizeof (int);
71 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
72 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 135 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
73 {
74 LOG (llevError, "InitConnection: Error on fcntl.\n"); 136 LOG (llevError, "InitConnection: Error on fcntl.\n");
75 }
76 137
77 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 138 state = ST_SETUP;
78 oldbufsize = 0;
79 if (oldbufsize < bufsize)
80 {
81#ifdef ESRV_DEBUG
82 LOG (llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
83#endif
84 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
85 {
86 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
87 }
88 }
89 buflen = sizeof (oldbufsize);
90 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
91#ifdef ESRV_DEBUG
92 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
93#endif
94
95 ns->faceset = 0;
96 ns->facecache = 0;
97 ns->image2 = 0;
98 ns->sound = 0;
99 ns->exp64 = 0;
100 ns->monitor_spells = 0;
101 ns->mapmode = Map0Cmd; 139 mapmode = Map1aCmd;
102 ns->darkness = 1;
103 ns->status = Ns_Add;
104 ns->mapx = 11; 140 mapx = 11;
105 ns->mapy = 11; 141 mapy = 11;
106 ns->newmapcmd = 0;
107 ns->itemcmd = 1; /* Default is version item1 command */ 142 itemcmd = 1; /* Default is version item1 command */
108 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 143 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
109 ns->EMI_smooth = 0;
110 ns->look_position = 0;
111 ns->update_look = 0;
112 ns->has_readable_type = 0;
113 ns->supported_readables = 0;
114 ns->monitor_spells = 0;
115 ns->mapinfocmd = 0;
116 ns->extcmd = 0;
117 ns->extmap = 0;
118 144
119 /* we should really do some checking here - if total clients overflows
120 * we need to do something more intelligent, because client id's will start
121 * duplicating (not likely in normal cases, but malicous attacks that
122 * just open and close connections could get this total up.
123 */
124 ns->inbuf.len = 0;
125 ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF);
126 /* Basic initialization. Needed because we do a check in
127 * HandleClient for oldsocketmode without checking the
128 * length of data.
129 */
130 memset (ns->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF);
131 memset (&ns->lastmap, 0, sizeof (struct Map));
132 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
133 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
134 memset (&ns->stats, 0, sizeof (struct statsinfo));
135 /* Do this so we don't send a face command for the client for 145 /* Do this so we don't send a face command for the client for
136 * this face. Face 0 is sent to the client to say clear 146 * this face. Face 0 is sent to the client to say clear
137 * face information. 147 * face information.
138 */ 148 */
139 ns->faces_sent[0] = NS_FACESENT_FACE; 149 faces_sent[0] = true;
150 fx_want [FT_FACE] = true; // all clients must support image faces
140 151
141 ns->outputbuffer.start = 0; 152 socket_ev.set (fd, EV_READ);
142 ns->outputbuffer.len = 0; 153 socket_ev.prio (2); // one higher than the ticker priority
143 ns->can_write = 1; 154 socket_ev.start ();
144 ns->password_fails = 0;
145 155
146 ns->current_map = 0; 156 // initialisation done, kick it!
147 ns->current_x = 0;
148 ns->current_y = 0;
149 ns->client[0] = 0;
150 ns->buggy_mapscroll = 0;
151
152 ns->sent_scroll = 0;
153 ns->host = strdup_local (from_ip);
154 sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 157 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
155 sl.buf = (unsigned char *) buf; 158 flush ();
156 sl.len = strlen ((char *) buf);
157 Send_With_Handling (ns, &sl);
158#ifdef CS_LOGSTATS
159 if (socket_info.nconns > cst_tot.max_conn)
160 cst_tot.max_conn = socket_info.nconns;
161 if (socket_info.nconns > cst_lst.max_conn)
162 cst_lst.max_conn = socket_info.nconns;
163#endif
164}
165 159
160 reset_stats ();
166 161
167/** This sets up the socket and reads all the image information into memory. */ 162 clients.insert (this);
163}
164
165client::~client ()
166{
167 clients.erase (this);
168
169 mapinfo_queue_clear ();
170 free (stats.range);
171 free (stats.title);
172 free (host);
173}
174
168void 175void
169init_ericserver (void) 176client::do_destroy ()
170{ 177{
171 struct sockaddr_in insock; 178 attachable::do_destroy ();
172 struct protoent *protox;
173 struct linger linger_opt;
174 179
175#ifdef HAVE_SYSCONF 180 if (pl)
176 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 181 pl->disconnect ();
177#else
178# ifdef HAVE_GETDTABLESIZE
179 socket_info.max_filedescriptor = getdtablesize ();
180# else
181 "Unable to find usable function to get max filedescriptors";
182# endif
183#endif
184 182
185 socket_info.timeout.tv_sec = 0; 183 if (fd >= 0)
186 socket_info.timeout.tv_usec = 0;
187 socket_info.nconns = 0;
188
189#ifdef CS_LOGSTATS
190 memset (&cst_tot, 0, sizeof (CS_Stats));
191 memset (&cst_lst, 0, sizeof (CS_Stats));
192 cst_tot.time_start = time (NULL);
193 cst_lst.time_start = time (NULL);
194#endif
195
196 LOG (llevDebug, "Initialize new client/server data\n");
197 socket_info.nconns = 1;
198 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
199 init_sockets[0].faces_sent = NULL; /* unused */
200 socket_info.allocated_sockets = 1;
201
202 protox = getprotobyname ("tcp");
203 if (protox == NULL)
204 { 184 {
205 LOG (llevError, "init_ericserver: Error getting protox\n"); 185 send_packet ("goodbye");
206 return; 186 flush ();
187
188 close (fd);
207 } 189 }
208 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
209 if (init_sockets[0].fd == -1)
210 {
211 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
212 exit (-1);
213 }
214 insock.sin_family = AF_INET;
215 insock.sin_port = htons (settings.csport);
216 insock.sin_addr.s_addr = htonl (INADDR_ANY);
217 190
218 linger_opt.l_onoff = 0; 191 state = ST_DEAD;
219 linger_opt.l_linger = 0;
220 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
221 {
222 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
223 }
224 192
225/* Would be nice to have an autoconf check for this. It appears that 193 socket_ev.stop ();
226 * these functions are both using the same calling syntax, just one
227 * of them needs extra valus passed.
228 */
229#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
230 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
231 defined(__FreeBSD__) || defined(__OpenBSD__) || \
232 defined(WIN32) /* ---win32 add this here */ || \
233 defined(__GNU__) /* HURD */
234 {
235 int tmp = 1;
236 194
237 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) 195 refcnt_dec (); // socket no longer open
238 {
239 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
240 }
241 }
242#else
243 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0))
244 {
245 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
246 }
247#endif
248
249 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
250 {
251 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
252 close (init_sockets[0].fd);
253 exit (-1);
254 }
255 if (listen (init_sockets[0].fd, 5) == (-1))
256 {
257 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
258 close (init_sockets[0].fd);
259 exit (-1);
260 }
261 init_sockets[0].status = Ns_Add;
262 read_client_images ();
263} 196}
264 197
265
266/*******************************************************************************
267 *
268 * Start of functions dealing with freeing of the data.
269 *
270 ******************************************************************************/
271
272/** Free's all the memory that ericserver allocates. */
273void 198void
274free_all_newserver (void) 199client::reset_stats ()
275{ 200{
276 LOG (llevDebug, "Freeing all new client/server information.\n"); 201 /* we need to clear these to -1 and not zero - otherwise,
277 free_socket_images (); 202 * if a player quits and starts a new character, we wont
278 free (init_sockets); 203 * send new values to the client, as things like exp start
279} 204 * at zero.
280
281/**
282 * Frees a socket.
283 * Basically, all we need to do here is free all data structures that
284 * might be associated with the socket. It is up to the caller to
285 * update the list
286 */ 205 */
206 for (int i = 0; i < NUM_SKILLS; i++)
207 last_skill_exp[i] = -1;
287 208
288void 209 for (int i = 0; i < NROFATTACKS; i++)
289free_newsocket (NewSocket * ns) 210 last_resist[i] = -1;
290{
291 if (close (ns->fd))
292 {
293 211
294#ifdef ESRV_DEBUG 212 last_weapon_sp = -1;
295 LOG (llevDebug, "Error closing socket %d\n", ns->fd); 213 last_level = -1;
296#endif 214 last_stats.exp = -1;
297 } 215 last_flags = 0;
216 last_weight = -1;
217 last_weight_limit = 0;
218 last_path_attuned = 0;
219 last_path_repelled = 0;
220 last_path_denied = 0;
221 last_speed = 0;
222 last_flags = 0;
298 223
299 if (ns->stats.range) 224 static living zero_living;
300 free (ns->stats.range); 225 last_stats = zero_living;
301
302 if (ns->stats.title)
303 free (ns->stats.title);
304
305 free (ns->host);
306 free (ns->inbuf.buf);
307} 226}
308 227
309/** Sends the 'goodbye' command to the player, and closes connection. */ 228client *
310void 229client::create (int fd, const char *peername)
311final_free_player (player *pl)
312{ 230{
313 cs_write_string (&pl->socket, "goodbye", 8); 231 client *ns = new client (dup (fd), peername);
314 free_newsocket (&pl->socket); 232 ns->instantiate (); // effectively a nop right now
315 free_player (pl); 233 INVOKE_CLIENT (CONNECT, ns);
234 return ns;
316} 235}
236

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