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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.12 by root, Thu Dec 14 00:01:35 2006 UTC vs.
Revision 1.74 by root, Sun Nov 11 04:29:11 2012 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 (©) 2005,2006,2007,2008,2009,2010,2011,2012 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 */
55client::client (int fd, const char *peername)
56: fd (fd), host (strdup (peername)),
57 socket_ev (this, &client::socket_cb)
58{
59 refcnt_inc (); // the socket is an external reference
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
129 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
130 LOG (llevError, "InitConnection: Error on fcntl.\n");
131
132 state = ST_SETUP;
133 mapx = 11;
134 mapy = 11;
135 itemcmd = 1; /* Default is version item1 command */
136 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
137
138 /* Do this so we don't send a face command for the client for
139 * this face. Face 0 is sent to the client to set meta data
140 * for following faces in fx.
141 */
142 faces_sent[0] = true;
143 fx_want [FT_FACE] = true; // all clients must support image faces
144
145 socket_ev.set (fd, EV_READ);
146 socket_ev.prio (2); // one higher than the ticker priority
147 socket_ev.start ();
148
149 reset_stats ();
150
151 clients.insert (this);
152}
153
154client::~client ()
155{
156 clients.erase (this);
157
158 while (!ixface.empty ())
159 ix_pop ();
160
161 mapinfo_queue_clear ();
162 free (stats.range);
163 free (stats.title);
164 free (host);
165 free (ws_inbuf);
166}
167
61void 168void
62InitConnection (NewSocket *ns, const char *from_ip) 169client::run ()
63{ 170{
64 SockList sl; 171 // initialisation done, kick it!
65 char buf[256]; 172 INVOKE_CLIENT (CONNECT, this);
66 int bufsize = 65535; /*Supposed absolute upper limit */
67 int oldbufsize;
68 int buflen = sizeof (int);
69 173
70 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 174 flush ();
71 LOG (llevError, "InitConnection: Error on fcntl.\n"); 175}
72 176
73 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 177void
74 oldbufsize = 0; 178client::do_destroy ()
179{
180 INVOKE_CLIENT (CLIENT_DESTROY, this);
181 attachable::do_destroy ();
75 182
76 if (oldbufsize < bufsize) 183 if (pl)
77 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 184 pl->disconnect ();
78 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
79 185
80 buflen = sizeof (oldbufsize); 186 if (fd >= 0)
81 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 187 {
82#ifdef ESRV_DEBUG 188 send_packet ("goodbye");
83 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); 189 flush ();
84#endif
85 190
86 ns->faceset = 0; 191 close (fd);
87 ns->facecache = 0; 192 }
88 ns->image2 = 0;
89 ns->sound = 0;
90 ns->exp64 = 0;
91 ns->monitor_spells = 0;
92 ns->mapmode = Map0Cmd;
93 ns->darkness = 1;
94 ns->status = Ns_Add;
95 ns->mapx = 11;
96 ns->mapy = 11;
97 ns->newmapcmd = 0;
98 ns->itemcmd = 1; /* Default is version item1 command */
99 ns->ext_mapinfos = 0; /*extendedmapinfo datas */
100 ns->EMI_smooth = 0;
101 ns->look_position = 0;
102 ns->update_look = 0;
103 ns->has_readable_type = 0;
104 ns->supported_readables = 0;
105 ns->monitor_spells = 0;
106 ns->mapinfocmd = 0;
107 ns->extcmd = 0;
108 ns->extmap = 0;
109 193
110 /* we should really do some checking here - if total clients overflows 194 state = ST_DEAD;
111 * we need to do something more intelligent, because client id's will start 195
112 * duplicating (not likely in normal cases, but malicous attacks that 196 socket_ev.stop ();
113 * just open and close connections could get this total up. 197
198 refcnt_dec (); // socket no longer open
199}
200
201void
202client::reset_stats ()
203{
204 /* we need to clear these to -1 and not zero - otherwise,
205 * if a player quits and starts a new character, we wont
206 * send new values to the client, as things like exp start
207 * at zero.
114 */ 208 */
115 ns->inbuf_len = 0; 209 for (int i = 0; i < array_length (last_skill_exp); i++)
210 last_skill_exp[i] = -1;
116 211
117 /* Basic initialization. Needed because we do a check in 212 for (int i = 0; i < array_length (last_resist); i++)
118 * HandleClient for oldsocketmode without checking the 213 last_resist[i] = -1;
119 * length of data.
120 */
121 memset (&ns->lastmap, 0, sizeof (struct Map));
122 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
123 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
124 memset (&ns->stats, 0, sizeof (struct statsinfo));
125 /* Do this so we don't send a face command for the client for
126 * this face. Face 0 is sent to the client to say clear
127 * face information.
128 */
129 ns->faces_sent[0] = NS_FACESENT_FACE;
130 214
131 ns->outputbuffer.start = 0; 215 last_weapon_sp = -1;
132 ns->outputbuffer.len = 0; 216 last_level = -1;
133 ns->can_write = 1; 217 last_stats.exp = -1;
134 ns->password_fails = 0; 218 last_flags = 0;
219 last_weight = -1;
220 last_weight_limit = 0;
221 last_path_attuned = 0;
222 last_path_repelled = 0;
223 last_path_denied = 0;
224 last_speed = 0;
225 last_flags = 0;
135 226
136 ns->current_map = 0; 227 static living zero_living;
137 ns->current_x = 0; 228 last_stats = zero_living;
138 ns->current_y = 0;
139 ns->client[0] = 0;
140 ns->buggy_mapscroll = 0;
141
142 ns->sent_scroll = 0;
143 ns->host = strdup_local (from_ip);
144 sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
145 sl.buf = (unsigned char *) buf;
146 sl.len = strlen ((char *) buf);
147 Send_With_Handling (ns, &sl);
148#ifdef CS_LOGSTATS
149 if (socket_info.nconns > cst_tot.max_conn)
150 cst_tot.max_conn = socket_info.nconns;
151 if (socket_info.nconns > cst_lst.max_conn)
152 cst_lst.max_conn = socket_info.nconns;
153#endif
154} 229}
155 230
156 231client *
157/** This sets up the socket and reads all the image information into memory. */ 232client::create (int fd, const char *peername)
158void
159init_ericserver (void)
160{ 233{
161 struct sockaddr_in insock; 234 client *ns = new client (dup (fd), peername);
162 struct protoent *protox;
163 struct linger linger_opt;
164 235
165 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 236 ns->instantiate (); // effectively a nop right now
166 237
167 socket_info.timeout.tv_sec = 0; 238 return ns;
168 socket_info.timeout.tv_usec = 0;
169 socket_info.nconns = 0;
170
171#ifdef CS_LOGSTATS
172 memset (&cst_tot, 0, sizeof (CS_Stats));
173 memset (&cst_lst, 0, sizeof (CS_Stats));
174 cst_tot.time_start = time (NULL);
175 cst_lst.time_start = time (NULL);
176#endif
177
178 LOG (llevDebug, "Initialize new client/server data\n");
179 socket_info.nconns = 1;
180 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
181 init_sockets[0].faces_sent = NULL; /* unused */
182 socket_info.allocated_sockets = 1;
183
184 protox = getprotobyname ("tcp");
185 if (protox == NULL)
186 {
187 LOG (llevError, "init_ericserver: Error getting protox\n");
188 return;
189 }
190
191 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
192 if (init_sockets[0].fd == -1)
193 {
194 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
195 exit (-1);
196 }
197
198 insock.sin_family = AF_INET;
199 insock.sin_port = htons (settings.csport);
200 insock.sin_addr.s_addr = htonl (INADDR_ANY);
201
202 linger_opt.l_onoff = 0;
203 linger_opt.l_linger = 0;
204 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
205 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
206
207 {
208 int tmp = 1;
209
210 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
211 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
212 }
213
214 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
215 {
216 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
217 close (init_sockets[0].fd);
218 exit (-1);
219 }
220
221 if (listen (init_sockets[0].fd, 5) == (-1))
222 {
223 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
224 close (init_sockets[0].fd);
225 exit (-1);
226 }
227
228 init_sockets[0].status = Ns_Add;
229 read_client_images ();
230} 239}
231 240
232
233/*******************************************************************************
234 *
235 * Start of functions dealing with freeing of the data.
236 *
237 ******************************************************************************/
238
239/** Free's all the memory that ericserver allocates. */
240void
241free_all_newserver (void)
242{
243 LOG (llevDebug, "Freeing all new client/server information.\n");
244 free_socket_images ();
245 free (init_sockets);
246}
247
248/**
249 * Frees a socket.
250 * Basically, all we need to do here is free all data structures that
251 * might be associated with the socket. It is up to the caller to
252 * update the list
253 */
254
255void
256free_newsocket (NewSocket *ns)
257{
258 close (ns->fd);
259
260 if (ns->stats.range)
261 free (ns->stats.range);
262
263 if (ns->stats.title)
264 free (ns->stats.title);
265
266 free (ns->host);
267}
268
269/** Sends the 'goodbye' command to the player, and closes connection. */
270void
271final_free_player (player *pl)
272{
273 cs_write_string (&pl->socket, "goodbye", 8);
274 free_newsocket (&pl->socket);
275 free_player (pl);
276}

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