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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.20 by root, Fri Dec 15 19:59:20 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,
… …
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{ 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
58 { 66 {
59 struct linger linger_opt; 67 struct linger linger_opt;
60 68
61 linger_opt.l_onoff = 0; 69 linger_opt.l_onoff = 0;
62 linger_opt.l_linger = 0; 70 linger_opt.l_linger = 0;
63 71
64 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)))
65 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); 73 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
66 } 74 }
67 75
68 { 76 {
69 int bufsize = 65535; /*Supposed absolute upper limit */ 77 int val;
70 int oldbufsize;
71 int buflen = sizeof (int);
72 78
73 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) 79#ifdef SO_RCVBUF
74 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
75 84
76 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 85#ifdef SO_SNDBUF
77 oldbufsize = 0; 86 val = SOCKET_SNDBUF;
78
79 if (oldbufsize < bufsize)
80 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 87 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
81 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
82 90
83 buflen = sizeof (oldbufsize); 91#ifdef IP_TOS
84 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
85 } 128 }
86 129
87 mapmode = Map0Cmd; 130 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
88 darkness = 1; 131 LOG (llevError, "InitConnection: Error on fcntl.\n");
89 status = Ns_Add; 132
133 state = ST_SETUP;
90 mapx = 11; 134 mapx = 11;
91 mapy = 11; 135 mapy = 11;
92 itemcmd = 1; /* Default is version item1 command */ 136 itemcmd = 1; /* Default is version item1 command */
93 137 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
94 faces_sent_len = nrofpixmaps;
95 faces_sent = (uint8 *)calloc (nrofpixmaps, sizeof (*faces_sent));
96 if (!faces_sent)
97 fatal (OUT_OF_MEMORY);
98 138
99 /* 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
100 * 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
101 * face information. 141 * for following faces in fx.
102 */ 142 */
103 faces_sent[0] = NS_FACESENT_FACE; 143 faces_sent[0] = true;
144 fx_want [FT_IMAGE] = true; // all clients must support image faces
104 145
146 socket_ev.set (fd, EV_READ);
147 socket_ev.prio (2); // one higher than the ticker priority
105 socket_ev.fd (fd); 148 socket_ev.start ();
106 149
150 reset_stats ();
151
152 clients.insert (this);
153}
154
155client::~client ()
156{
157 clients.erase (this);
158
159 while (!ixface.empty ())
160 ix_pop ();
161
162 mapinfo_queue_clear ();
163 free (stats.range);
164 free (stats.title);
165 free (host);
166 free (ws_inbuf);
167}
168
169void
170client::run ()
171{
107 // initialisation done, kick it! 172 // initialisation done, kick it!
173 INVOKE_CLIENT (CONNECT, this);
108 174
109 {
110 packet sl;
111 sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
112 send_packet (sl);
113 flush (); 175 flush ();
114 }
115
116#if 0//TODO
117 socket_info.nconns++;
118 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
119 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
120#endif
121} 176}
122 177
123client::~client ()
124{
125 status = Ns_Dead;
126}
127
128/** This sets up the socket and reads all the image information into memory. */
129void 178void
130init_ericserver (void) 179client::do_destroy ()
131{ 180{
132 struct sockaddr_in insock; 181 INVOKE_CLIENT (CLIENT_DESTROY, this);
133 struct linger linger_opt; 182 attachable::do_destroy ();
134 183
135 memset (&cst_tot, 0, sizeof (CS_Stats)); 184 if (pl)
136 memset (&cst_lst, 0, sizeof (CS_Stats)); 185 pl->disconnect ();
137 cst_tot.time_start = time (NULL);
138 cst_lst.time_start = time (NULL);
139 186
140 LOG (llevDebug, "Initialize new client/server data\n"); 187 if (fd >= 0)
188 {
189 send_packet ("goodbye");
190 flush ();
141 191
142 read_client_images (); 192 close (fd);
143} 193 }
144 194
195 state = ST_DEAD;
145 196
146/******************************************************************************* 197 socket_ev.stop ();
147 *
148 * Start of functions dealing with freeing of the data.
149 *
150 ******************************************************************************/
151 198
152/** Free's all the memory that ericserver allocates. */ 199 refcnt_dec (); // socket no longer open
200}
201
153void 202void
154free_all_newserver (void) 203client::reset_stats ()
155{ 204{
156 LOG (llevDebug, "Freeing all new client/server information.\n"); 205 /* we need to clear these to -1 and not zero - otherwise,
157 free_socket_images (); 206 * if a player quits and starts a new character, we wont
158} 207 * send new values to the client, as things like exp start
159 208 * at zero.
160/**
161 * Frees a socket.
162 * Basically, all we need to do here is free all data structures that
163 * might be associated with the socket. It is up to the caller to
164 * update the list
165 */ 209 */
210 for (int i = 0; i < array_length (last_skill_exp); i++)
211 last_skill_exp[i] = -1;
166 212
167void 213 for (int i = 0; i < array_length (last_resist); i++)
168free_newsocket (client *ns) 214 last_resist[i] = -1;
169{
170 if (ns->fd >= 0)
171 close (ns->fd);
172 215
173 if (ns->stats.range) 216 last_weapon_sp = -1;
174 free (ns->stats.range); 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;
175 227
176 if (ns->stats.title) 228 static living zero_living;
177 free (ns->stats.title); 229 last_stats = zero_living;
178
179 free (ns->host);
180
181 ns->fd = -1;
182 ns->stats.range = 0;
183 ns->stats.title = 0;
184 ns->host = 0;
185} 230}
186 231
187/** Sends the 'goodbye' command to the player, and closes connection. */ 232client *
188void
189final_free_player (player *pl)
190{
191 pl->socket->send_packet ("goodbye");
192 free_newsocket (pl->socket);
193 free_player (pl);
194}
195
196bool
197add_client (int fd, const char *peername) 233client::create (int fd, const char *peername)
198{ 234{
199 if (checkbanned (NULL, peername))
200 {
201 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
202 return false;
203 }
204 else
205 {
206 client *ns = new client (dup (fd), peername); 235 client *ns = new client (dup (fd), peername);
207 clients.push_back (ns);
208 return true;
209 }
210}
211 236
237 ns->instantiate (); // effectively a nop right now
238
239 return ns;
240}
241

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