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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.15 by root, Thu Dec 14 02:37:37 2006 UTC vs.
Revision 1.69 by root, Tue Feb 8 00:17:14 2011 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>
54client_socket *init_sockets;
55 41
56client_socket::client_socket () 42// use relatively small values, as we do not expect to receive much,
57{ 43// and we do userspace write buffering
58} 44// 8kb limits throughput to roughly 66kb/s
45#define SOCKET_RCVBUF 8192
46#define SOCKET_SNDBUF 16384
59 47
60client_socket::~client_socket () 48sockvec clients;
61{
62}
63 49
64/** 50/**
65 * Initializes a connection. Really, it just sets up the data structure, 51 * Initializes a connection. Really, it just sets up the data structure,
66 * 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
67 * client. 53 * client.
68 */ 54 */
69void 55client::client (int fd, const char *peername)
70client_socket::init (const char *from_ip) 56: fd (fd), host (strdup (peername)),
57 socket_ev (this, &client::socket_cb)
71{ 58{
72 int bufsize = 65535; /*Supposed absolute upper limit */ 59 refcnt_inc (); // the socket is an external reference
73 int oldbufsize; 60
74 int buflen = sizeof (int); 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 }
75 128
76 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) 129 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
77 LOG (llevError, "InitConnection: Error on fcntl.\n"); 130 LOG (llevError, "InitConnection: Error on fcntl.\n");
78 131
79 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 132 state = ST_SETUP;
80 oldbufsize = 0;
81
82 if (oldbufsize < bufsize)
83 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
84 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
85
86 buflen = sizeof (oldbufsize);
87 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
88#ifdef ESRV_DEBUG
89 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
90#endif
91
92 faceset = 0;
93 facecache = 0;
94 image2 = 0;
95 sound = 0;
96 exp64 = 0;
97 monitor_spells = 0;
98 mapmode = Map0Cmd;
99 darkness = 1;
100 status = Ns_Add;
101 mapx = 11; 133 mapx = 11;
102 mapy = 11; 134 mapy = 11;
103 newmapcmd = 0;
104 itemcmd = 1; /* Default is version item1 command */ 135 itemcmd = 1; /* Default is version item1 command */
105 ext_mapinfos = 0; /*extendedmapinfo datas */ 136 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
106 EMI_smooth = 0;
107 look_position = 0;
108 update_look = 0;
109 has_readable_type = 0;
110 supported_readables = 0;
111 monitor_spells = 0;
112 mapinfocmd = 0;
113 extcmd = 0;
114 extmap = 0;
115 137
116 /* we should really do some checking here - if total clients overflows
117 * we need to do something more intelligent, because client id's will start
118 * duplicating (not likely in normal cases, but malicous attacks that
119 * just open and close connections could get this total up.
120 */
121 inbuf_len = 0;
122
123 /* Basic initialization. Needed because we do a check in
124 * HandleClient for oldsocketmode without checking the
125 * length of data.
126 */
127 memset (&lastmap, 0, sizeof (struct Map));
128 memset (faces_sent, 0, faces_sent_len * sizeof (*faces_sent));
129 memset (&anims_sent, 0, sizeof (anims_sent));
130 memset (&stats, 0, sizeof (struct statsinfo));
131 /* Do this so we don't send a face command for the client for 138 /* Do this so we don't send a face command for the client for
132 * this face. Face 0 is sent to the client to say clear 139 * this face. Face 0 is sent to the client to say clear
133 * face information. 140 * face information.
134 */ 141 */
135 faces_sent[0] = NS_FACESENT_FACE; 142 faces_sent[0] = true;
143 fx_want [FT_FACE] = true; // all clients must support image faces
136 144
137 outputbuffer.start = 0; 145 socket_ev.set (fd, EV_READ);
138 outputbuffer.len = 0; 146 socket_ev.prio (2); // one higher than the ticker priority
139 can_write = 1; 147 socket_ev.start ();
140 password_fails = 0;
141 148
142 current_map = 0; 149 // initialisation done, kick it!
143 current_x = 0; 150 INVOKE_CLIENT (CONNECT, this);
144 current_y = 0;
145 client[0] = 0;
146 buggy_mapscroll = 0;
147 151
148 sent_scroll = 0; 152 flush ();
149 host = strdup_local (from_ip);
150 153
151 { 154 reset_stats ();
152 packet sl;
153 sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
154 send_packet (sl);
155 }
156 155
157 if (socket_info.nconns > cst_tot.max_conn) 156 clients.insert (this);
158 cst_tot.max_conn = socket_info.nconns;
159 if (socket_info.nconns > cst_lst.max_conn)
160 cst_lst.max_conn = socket_info.nconns;
161} 157}
162 158
159client::~client ()
160{
161 clients.erase (this);
163 162
164/** This sets up the socket and reads all the image information into memory. */ 163 mapinfo_queue_clear ();
164 free (stats.range);
165 free (stats.title);
166 free (host);
167}
168
165void 169void
166init_ericserver (void) 170client::do_destroy ()
167{ 171{
168 struct sockaddr_in insock; 172 INVOKE_CLIENT (CLIENT_DESTROY, this);
169 struct protoent *protox; 173 attachable::do_destroy ();
170 struct linger linger_opt;
171 174
172 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 175 if (pl)
176 pl->disconnect ();
173 177
174 socket_info.timeout.tv_sec = 0; 178 if (fd >= 0)
175 socket_info.timeout.tv_usec = 0;
176 socket_info.nconns = 0;
177
178 memset (&cst_tot, 0, sizeof (CS_Stats));
179 memset (&cst_lst, 0, sizeof (CS_Stats));
180 cst_tot.time_start = time (NULL);
181 cst_lst.time_start = time (NULL);
182
183 LOG (llevDebug, "Initialize new client/server data\n");
184 socket_info.nconns = 1;
185 init_sockets = (client_socket *) malloc (sizeof (client_socket));
186 init_sockets[0].faces_sent = NULL; /* unused */
187 socket_info.allocated_sockets = 1;
188
189 protox = getprotobyname ("tcp");
190 if (protox == NULL)
191 { 179 {
192 LOG (llevError, "init_ericserver: Error getting protox\n"); 180 send_packet ("goodbye");
193 return; 181 flush ();
182
183 close (fd);
194 } 184 }
195 185
196 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); 186 state = ST_DEAD;
197 if (init_sockets[0].fd == -1)
198 {
199 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
200 exit (-1);
201 }
202 187
203 insock.sin_family = AF_INET; 188 socket_ev.stop ();
204 insock.sin_port = htons (settings.csport);
205 insock.sin_addr.s_addr = htonl (INADDR_ANY);
206 189
207 linger_opt.l_onoff = 0; 190 refcnt_dec (); // socket no longer open
208 linger_opt.l_linger = 0;
209 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
210 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
211
212 {
213 int tmp = 1;
214
215 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
216 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
217 }
218
219 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
220 {
221 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
222 close (init_sockets[0].fd);
223 exit (-1);
224 }
225
226 if (listen (init_sockets[0].fd, 5) == (-1))
227 {
228 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
229 close (init_sockets[0].fd);
230 exit (-1);
231 }
232
233 init_sockets[0].status = Ns_Add;
234 read_client_images ();
235} 191}
236 192
237
238/*******************************************************************************
239 *
240 * Start of functions dealing with freeing of the data.
241 *
242 ******************************************************************************/
243
244/** Free's all the memory that ericserver allocates. */
245void 193void
246free_all_newserver (void) 194client::reset_stats ()
247{ 195{
248 LOG (llevDebug, "Freeing all new client/server information.\n"); 196 /* we need to clear these to -1 and not zero - otherwise,
249 free_socket_images (); 197 * if a player quits and starts a new character, we wont
250 free (init_sockets); 198 * send new values to the client, as things like exp start
251} 199 * at zero.
252
253/**
254 * Frees a socket.
255 * Basically, all we need to do here is free all data structures that
256 * might be associated with the socket. It is up to the caller to
257 * update the list
258 */ 200 */
201 for (int i = 0; i < array_length (last_skill_exp); i++)
202 last_skill_exp[i] = -1;
259 203
260void 204 for (int i = 0; i < array_length (last_resist); i++)
261free_newsocket (client_socket *ns) 205 last_resist[i] = -1;
262{
263 close (ns->fd);
264 206
265 if (ns->stats.range) 207 last_weapon_sp = -1;
266 free (ns->stats.range); 208 last_level = -1;
209 last_stats.exp = -1;
210 last_flags = 0;
211 last_weight = -1;
212 last_weight_limit = 0;
213 last_path_attuned = 0;
214 last_path_repelled = 0;
215 last_path_denied = 0;
216 last_speed = 0;
217 last_flags = 0;
267 218
268 if (ns->stats.title) 219 static living zero_living;
269 free (ns->stats.title); 220 last_stats = zero_living;
270
271 free (ns->host);
272} 221}
273 222
274/** Sends the 'goodbye' command to the player, and closes connection. */ 223client *
275void 224client::create (int fd, const char *peername)
276final_free_player (player *pl)
277{ 225{
278 pl->socket.send_packet ("goodbye"); 226 client *ns = new client (dup (fd), peername);
279 free_newsocket (&pl->socket);
280 free_player (pl);
281}
282 227
228 ns->instantiate (); // effectively a nop right now
229
230 return ns;
231}
232

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