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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.22 by root, Sat Dec 16 21:40:26 2006 UTC vs.
Revision 1.77 by root, Sat Nov 17 23:40:05 2018 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 (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
5 Copyright (C) 1992 Frank Tore Johansen 5 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
6 6 *
7 This program is free software; you can redistribute it and/or modify 7 * Deliantra is free software: you can redistribute it and/or modify it under
8 it under the terms of the GNU General Public License as published by 8 * 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 9 * Free Software Foundation, either version 3 of the License, or (at your
10 (at your option) any later version. 10 * option) any later version.
11 11 *
12 This program is distributed in the hope that it will be useful, 12 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 15 * GNU General Public License for more details.
16 16 *
17 You should have received a copy of the GNU General Public License 17 * 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 18 * and the GNU General Public License along with this program. If not, see
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 * <http://www.gnu.org/licenses/>.
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 <support@deliantra.net>
22*/ 22 */
23 23
24/** 24/*
25 * \file
26 * Socket general functions 25 * 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 */ 26 */
34
35 27
36#include <global.h> 28#include <global.h>
37#include <sproto.h> 29#include <sproto.h>
38#include <sys/types.h> 30#include <sys/types.h>
39#include <sys/time.h> 31#include <sys/time.h>
40#include <sys/socket.h> 32#include <sys/socket.h>
41#include <netinet/in.h> 33#include <netinet/in.h>
34#include <netinet/tcp.h>
35#include <netinet/ip.h>
42#include <netdb.h> 36#include <netdb.h>
43 37
44#include <unistd.h> 38#include <unistd.h>
45#include <arpa/inet.h> 39#include <arpa/inet.h>
40
41#include <algorithm>
42
43// use relatively small values, as we do not expect to receive much,
44// and we do userspace write buffering
45// 8kb limits throughput to roughly 66kb/s
46#define SOCKET_RCVBUF 8192
47#define SOCKET_SNDBUF 16384
46 48
47sockvec clients; 49sockvec clients;
48 50
49/** 51/**
50 * Initializes a connection. Really, it just sets up the data structure, 52 * Initializes a connection. Really, it just sets up the data structure,
51 * socket setup is handled elsewhere. We do send a version to the 53 * socket setup is handled elsewhere. We do send a version to the
52 * client. 54 * client.
53 */ 55 */
54client::client (int fd, const char *peername) 56client::client (int fd, const char *peername)
55: fd (fd), host (strdup (peername)), 57: fd (fd), host (strdup (peername)),
56 socket_ev (this, &client::socket_cb), 58 socket_ev (this, &client::socket_cb)
57 cmd_ev (this, &client::cmd_cb)
58{ 59{
60 refcnt_inc (); // the socket is an external reference
61
62 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
63
64 socket_timeout = 16.;
65
59 { 66 {
60 struct linger linger_opt; 67 struct linger linger_opt;
61 68
62 linger_opt.l_onoff = 0; 69 linger_opt.l_onoff = 0;
63 linger_opt.l_linger = 0; 70 linger_opt.l_linger = 0;
64 71
65 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) 72 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
66 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); 73 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
67 } 74 }
68 75
69 { 76 {
70 int bufsize = 65535; /*Supposed absolute upper limit */ 77 int val;
71 int oldbufsize;
72 int buflen = sizeof (int);
73 78
74 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) 79#ifdef SO_RCVBUF
75 LOG (llevError, "InitConnection: Error on fcntl.\n"); 80 val = SOCKET_RCVBUF;
81 if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
82 LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
83#endif
76 84
77 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 85#ifdef SO_SNDBUF
78 oldbufsize = 0; 86 val = SOCKET_SNDBUF;
79
80 if (oldbufsize < bufsize)
81 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 87 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
82 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); 88 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
89#endif
83 90
84 buflen = sizeof (oldbufsize); 91#ifdef IP_TOS
85 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 92 val = IPTOS_LOWDELAY;
93 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
94 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
95#endif
96
97#ifdef TCP_NODELAY
98 val = 1;
99 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
100 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
101#endif
102
103 // set some very aggressive keepalive parameters
104#ifdef TCP_KEEPIDLE
105 val = 1;
106 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
107 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
108#endif
109
110#ifdef TCP_KEEPCNT
111 val = 3;
112 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
113 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
114#endif
115
116#ifdef TCP_KEEPINTVL
117 val = 1;
118 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
119 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
120#endif
121
122 // try to find the mss value in use
123#ifdef TCP_MAXSEG
124 socklen_t sl = sizeof (val);
125 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
126 mss = val;
127#endif
86 } 128 }
87 129
88 mapmode = Map0Cmd; 130 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
89 darkness = 1; 131 LOG (llevError, "InitConnection: Error on fcntl.\n");
90 status = Ns_Add; 132
133 state = ST_SETUP;
91 mapx = 11; 134 mapx = 11;
92 mapy = 11; 135 mapy = 11;
93 itemcmd = 1; /* Default is version item1 command */ 136 itemcmd = 1; /* Default is version item1 command */
94 137 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
95 faces_sent = salloc<uint8> (nrofpixmaps, 0);
96 138
97 /* 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
98 * this face. Face 0 is sent to the client to say clear 140 * this face. Face 0 is sent to the client to set meta data
99 * face information. 141 * for following faces in fx.
100 */ 142 */
101 faces_sent[0] = NS_FACESENT_FACE; 143 faces_sent[0] = true;
144 fx_want [FT_IMAGE] = true; // all clients must support image faces
102 145
103 // socket I/O is low priority 146 socket_ev.set (fd, EV_READ);
104 // we prefer to have the server run instead of handling client requests 147 socket_ev.prio (2); // one higher than the ticker priority
105 socket_ev.prio (PE_PRIO_NORMAL + 1);
106 socket_ev.fd (fd); 148 socket_ev.start ();
107 socket_ev.poll (PE_R);
108 149
109 // command handling is even lower priority 150 reset_stats ();
110 // that way no client can monopolise the server
111 cmd_ev.prio (PE_PRIO_NORMAL + 2);
112 151
113 // initialisation done, kick it! 152 clients.insert (this);
114 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
115 flush ();
116
117#if 0//TODO
118 socket_info.nconns++;
119 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
120 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
121#endif
122} 153}
123 154
124client::~client () 155client::~client ()
125{ 156{
126 if (pl) 157 clients.erase (this);
127 pl->socket = 0;
128 158
129 if (fd >= 0) 159 while (!ixface.empty ())
130 close (fd); 160 ix_pop ();
131 161
132 free (faces_sent); 162 mapinfo_queue_clear ();
133 free (stats.range); 163 free (stats.range);
134 free (stats.title); 164 free (stats.title);
135 free (host); 165 free (host);
166 free (ws_inbuf);
136} 167}
137 168
138void 169void
139client::destroy () 170client::run ()
140{ 171{
141 status = Ns_Dead; 172 // initialisation done, kick it!
142 socket_ev.suspend (); 173 INVOKE_CLIENT (CONNECT, this);
143 cmd_ev.suspend ();
144}
145 174
146/** This sets up the socket and reads all the image information into memory. */ 175 flush ();
176}
177
147void 178void
148init_ericserver (void) 179client::do_destroy ()
149{ 180{
150 cst_tot.time_start = time (NULL); 181 INVOKE_CLIENT (CLIENT_DESTROY, this);
151 cst_lst.time_start = time (NULL); 182 attachable::do_destroy ();
152 183
153 LOG (llevDebug, "Initialize new client/server data\n"); 184 if (pl)
185 pl->disconnect ();
154 186
155 read_client_images (); 187 if (fd >= 0)
156} 188 {
189 send_packet ("goodbye");
190 flush ();
157 191
192 close (fd);
193 }
158 194
159/******************************************************************************* 195 state = ST_DEAD;
160 *
161 * Start of functions dealing with freeing of the data.
162 *
163 ******************************************************************************/
164 196
165/** Free's all the memory that ericserver allocates. */ 197 socket_ev.stop ();
198
199 refcnt_dec (); // socket no longer open
200}
201
166void 202void
167free_all_newserver (void) 203client::reset_stats ()
168{ 204{
169 LOG (llevDebug, "Freeing all new client/server information.\n"); 205 /* we need to clear these to -1 and not zero - otherwise,
170 free_socket_images (); 206 * if a player quits and starts a new character, we wont
171} 207 * send new values to the client, as things like exp start
208 * at zero.
209 */
210 for (int i = 0; i < array_length (last_skill_exp); i++)
211 last_skill_exp[i] = -1;
172 212
173/** Sends the 'goodbye' command to the player, and closes connection. */ 213 for (int i = 0; i < array_length (last_resist); i++)
174void 214 last_resist[i] = -1;
175final_free_player (player *pl)
176{
177 free_player (pl);
178}
179 215
180bool 216 last_weapon_sp = -1;
217 last_level = -1;
218 last_stats.exp = -1;
219 last_flags = 0;
220 last_weight = -1;
221 last_weight_limit = 0;
222 last_path_attuned = 0;
223 last_path_repelled = 0;
224 last_path_denied = 0;
225 last_speed = 0;
226 last_flags = 0;
227
228 static living zero_living;
229 last_stats = zero_living;
230}
231
232client *
181add_client (int fd, const char *peername) 233client::create (int fd, const char *peername)
182{ 234{
183 if (checkbanned (NULL, peername))
184 {
185 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
186 return false;
187 }
188 else
189 {
190 client *ns = new client (dup (fd), peername); 235 client *ns = new client (dup (fd), peername);
191 clients.push_back (ns);
192 return true;
193 }
194}
195 236
237 ns->instantiate (); // effectively a nop right now
238
239 return ns;
240}
241

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