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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.13 by root, Thu Dec 14 01:12:35 2006 UTC vs.
Revision 1.66 by root, Thu Apr 8 19:31:22 2010 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 (C) 2001 Mark Wedel 4 * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 Copyright (C) 1992 Frank Tore Johansen 5 *
6 6 * Deliantra is free software: you can redistribute it and/or modify it under
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 7 * the terms of the Affero GNU General Public License as published by the
9 the Free Software Foundation; either version 2 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
10 (at your option) any later version. 9 * option) any later version.
11 10 *
12 This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 14 * GNU General Public License for more details.
16 15 *
17 You should have received a copy of the GNU General Public License 16 * You should have received a copy of the Affero GNU General Public License
18 along with this program; if not, write to the Free Software 17 * and the GNU General Public License along with this program. If not, see
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * <http://www.gnu.org/licenses/>.
20 19 *
21 The author can be reached via e-mail to <crossfire@schmorp.de> 20 * The authors can be reached via e-mail to <support@deliantra.net>
22*/ 21 */
23 22
24/** 23/*
25 * \file
26 * Socket general functions 24 * 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 */ 25 */
34
35 26
36#include <global.h> 27#include <global.h>
37#include <sproto.h> 28#include <sproto.h>
38#include <sys/types.h> 29#include <sys/types.h>
39#include <sys/time.h> 30#include <sys/time.h>
40#include <sys/socket.h> 31#include <sys/socket.h>
41#include <netinet/in.h> 32#include <netinet/in.h>
33#include <netinet/tcp.h>
34#include <netinet/ip.h>
42#include <netdb.h> 35#include <netdb.h>
43 36
44#ifdef HAVE_UNISTD_H
45# include <unistd.h> 37#include <unistd.h>
46#endif
47
48#ifdef HAVE_ARPA_INET_H
49# include <arpa/inet.h> 38#include <arpa/inet.h>
50#endif
51#include <newserver.h>
52 39
53Socket_Info socket_info; 40#include <algorithm>
54NewSocket *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;
55 49
56/** 50/**
57 * Initializes a connection. Really, it just sets up the data structure, 51 * Initializes a connection. Really, it just sets up the data structure,
58 * 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
59 * client. 53 * client.
60 */ 54 */
61void 55client::client (int fd, const char *peername)
62InitConnection (NewSocket *ns, const char *from_ip) 56: fd (fd), host (strdup (peername)),
57 socket_ev (this, &client::socket_cb)
63{ 58{
64 int bufsize = 65535; /*Supposed absolute upper limit */ 59 refcnt_inc (); // the socket is an external reference
65 int oldbufsize;
66 int buflen = sizeof (int);
67 60
61 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
62
63 socket_timeout = 16.;
64
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
68 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 129 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
69 LOG (llevError, "InitConnection: Error on fcntl.\n"); 130 LOG (llevError, "InitConnection: Error on fcntl.\n");
70 131
71 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 132 state = ST_SETUP;
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; 133 mapmode = Map1aCmd;
91 ns->darkness = 1;
92 ns->status = Ns_Add;
93 ns->mapx = 11; 134 mapx = 11;
94 ns->mapy = 11; 135 mapy = 11;
95 ns->newmapcmd = 0;
96 ns->itemcmd = 1; /* Default is version item1 command */ 136 itemcmd = 1; /* Default is version item1 command */
97 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 137 max_rate = 200000 / (1000000 / MAX_TIME); // ~2mbit is assumed per default
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;
107 138
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 139 /* 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 140 * this face. Face 0 is sent to the client to say clear
125 * face information. 141 * face information.
126 */ 142 */
127 ns->faces_sent[0] = NS_FACESENT_FACE; 143 faces_sent[0] = true;
144 fx_want [FT_FACE] = true; // all clients must support image faces
128 145
129 ns->outputbuffer.start = 0; 146 socket_ev.set (fd, EV_READ);
130 ns->outputbuffer.len = 0; 147 socket_ev.prio (2); // one higher than the ticker priority
131 ns->can_write = 1; 148 socket_ev.start ();
132 ns->password_fails = 0;
133 149
134 ns->current_map = 0; 150 // initialisation done, kick it!
135 ns->current_x = 0; 151 INVOKE_CLIENT (CONNECT, this);
136 ns->current_y = 0;
137 ns->client[0] = 0;
138 ns->buggy_mapscroll = 0;
139 152
140 ns->sent_scroll = 0; 153 flush ();
141 ns->host = strdup_local (from_ip);
142 154
143 { 155 reset_stats ();
144 SockList sl (MAXSOCKBUF);
145 156
146 sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 157 clients.insert (this);
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}
158 159
160client::~client ()
161{
162 clients.erase (this);
159 163
160/** This sets up the socket and reads all the image information into memory. */ 164 mapinfo_queue_clear ();
165 free (stats.range);
166 free (stats.title);
167 free (host);
168}
169
161void 170void
162init_ericserver (void) 171client::do_destroy ()
163{ 172{
164 struct sockaddr_in insock; 173 INVOKE_CLIENT (CLIENT_DESTROY, this);
165 struct protoent *protox; 174 attachable::do_destroy ();
166 struct linger linger_opt;
167 175
168 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 176 if (pl)
177 pl->disconnect ();
169 178
170 socket_info.timeout.tv_sec = 0; 179 if (fd >= 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 { 180 {
190 LOG (llevError, "init_ericserver: Error getting protox\n"); 181 send_packet ("goodbye");
191 return; 182 flush ();
183
184 close (fd);
192 } 185 }
193 186
194 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); 187 state = ST_DEAD;
195 if (init_sockets[0].fd == -1)
196 {
197 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
198 exit (-1);
199 }
200 188
201 insock.sin_family = AF_INET; 189 socket_ev.stop ();
202 insock.sin_port = htons (settings.csport);
203 insock.sin_addr.s_addr = htonl (INADDR_ANY);
204 190
205 linger_opt.l_onoff = 0; 191 refcnt_dec (); // socket no longer open
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} 192}
234 193
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. */
243void 194void
244free_all_newserver (void) 195client::reset_stats ()
245{ 196{
246 LOG (llevDebug, "Freeing all new client/server information.\n"); 197 /* we need to clear these to -1 and not zero - otherwise,
247 free_socket_images (); 198 * if a player quits and starts a new character, we wont
248 free (init_sockets); 199 * send new values to the client, as things like exp start
249} 200 * at zero.
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 */ 201 */
202 for (int i = 0; i < NUM_SKILLS; i++)
203 last_skill_exp[i] = -1;
257 204
258void 205 for (int i = 0; i < NROFATTACKS; i++)
259free_newsocket (NewSocket *ns) 206 last_resist[i] = -1;
260{
261 close (ns->fd);
262 207
263 if (ns->stats.range) 208 last_weapon_sp = -1;
264 free (ns->stats.range); 209 last_level = -1;
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;
265 219
266 if (ns->stats.title) 220 static living zero_living;
267 free (ns->stats.title); 221 last_stats = zero_living;
268
269 free (ns->host);
270} 222}
271 223
272/** Sends the 'goodbye' command to the player, and closes connection. */ 224client *
273void 225client::create (int fd, const char *peername)
274final_free_player (player *pl)
275{ 226{
276 pl->socket.send_packet ("goodbye"); 227 client *ns = new client (dup (fd), peername);
277 free_newsocket (&pl->socket);
278 free_player (pl);
279}
280 228
229 ns->instantiate (); // effectively a nop right now
230
231 return ns;
232}
233

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