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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.17 by root, Thu Dec 14 20:39:54 2006 UTC vs.
Revision 1.78 by root, Sat Dec 1 20:22:13 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#ifdef HAVE_UNISTD_H
45# include <unistd.h> 38#include <unistd.h>
46#endif
47
48#ifdef HAVE_ARPA_INET_H
49# include <arpa/inet.h> 39#include <arpa/inet.h>
50#endif
51#include <newserver.h>
52 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
48
53sockvec client_sockets; 49sockvec clients;
54 50
55/** 51/**
56 * Initializes a connection. Really, it just sets up the data structure, 52 * Initializes a connection. Really, it just sets up the data structure,
57 * 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
58 * client. 54 * client.
59 */ 55 */
60client_socket::client_socket (int fd, const char *peername) 56client::client (int fd, const char *peername)
61: fd (fd), host (strdup (peername)), 57: fd (fd), host (strdup (peername)),
62 socket_ev (this, &client_socket::socket_cb) 58 socket_ev (this, &client::socket_cb)
63{ 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
64 { 66 {
65 struct linger linger_opt; 67 struct linger linger_opt;
66 68
67 linger_opt.l_onoff = 0; 69 linger_opt.l_onoff = 0;
68 linger_opt.l_linger = 0; 70 linger_opt.l_linger = 0;
69 71
70 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)))
71 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); 73 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
72 } 74 }
73 75
74 { 76 {
75 int bufsize = 65535; /*Supposed absolute upper limit */ 77 int val;
76 int oldbufsize;
77 int buflen = sizeof (int);
78 78
79 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) 79#ifdef SO_RCVBUF
80 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
81 84
82 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 85#ifdef SO_SNDBUF
83 oldbufsize = 0; 86 val = SOCKET_SNDBUF;
84
85 if (oldbufsize < bufsize)
86 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 87 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
87 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
88 90
89 buflen = sizeof (oldbufsize); 91#ifdef IP_TOS
90 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
91 } 128 }
92 129
93 mapmode = Map0Cmd; 130 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
94 darkness = 1; 131 LOG (llevError, "InitConnection: Error on fcntl.\n");
95 status = Ns_Add; 132
133 state = ST_SETUP;
96 mapx = 11; 134 mapx = 11;
97 mapy = 11; 135 mapy = 11;
98 itemcmd = 1; /* Default is version item1 command */ 136 itemcmd = 1; /* Default is version item1 command */
99 137 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
100 faces_sent_len = nrofpixmaps;
101 faces_sent = (uint8 *)calloc (nrofpixmaps, sizeof (*faces_sent));
102 if (!faces_sent)
103 fatal (OUT_OF_MEMORY);
104 138
105 /* 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
106 * 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
107 * face information. 141 * for following faces in fx.
108 */ 142 */
109 faces_sent[0] = NS_FACESENT_FACE; 143 faces_sent[0] = true;
144 fx_want [FT_IMAGE] = true; // all clients must support image faces
110 145
111 socket_ev.fd (fd).poll (PE_W).start (); 146 socket_ev.set (fd, EV_READ);
147 socket_ev.prio (2); // one higher than the ticker priority
148 socket_ev.start ();
112 149
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{
113 // initialisation done, kick it! 172 // initialisation done, kick it!
173 INVOKE_CLIENT (CONNECT, this);
114 174
115 { 175 flush ();
116 packet sl;
117 sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
118 send_packet (sl);
119 }
120
121#if 0//TODO
122 socket_info.nconns++;
123 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
124 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
125#endif
126} 176}
127 177
128client_socket::~client_socket ()
129{
130 status = Ns_Dead;
131}
132
133/** This sets up the socket and reads all the image information into memory. */
134void 178void
135init_ericserver (void) 179client::do_destroy ()
136{ 180{
137 struct sockaddr_in insock; 181 INVOKE_CLIENT (CLIENT_DESTROY, this);
138 struct linger linger_opt; 182 attachable::do_destroy ();
139 183
140 memset (&cst_tot, 0, sizeof (CS_Stats)); 184 if (pl)
141 memset (&cst_lst, 0, sizeof (CS_Stats)); 185 pl->disconnect ();
142 cst_tot.time_start = time (NULL);
143 cst_lst.time_start = time (NULL);
144 186
145 LOG (llevDebug, "Initialize new client/server data\n"); 187 if (fd >= 0)
188 {
189 send_packet ("goodbye");
190 flush ();
146 191
147 read_client_images (); 192 close (fd);
148} 193 }
149 194
195 state = ST_DEAD;
150 196
151/******************************************************************************* 197 socket_ev.stop ();
152 *
153 * Start of functions dealing with freeing of the data.
154 *
155 ******************************************************************************/
156 198
157/** Free's all the memory that ericserver allocates. */ 199 refcnt_dec (); // socket no longer open
200}
201
158void 202void
159free_all_newserver (void) 203client::reset_stats ()
160{ 204{
161 LOG (llevDebug, "Freeing all new client/server information.\n"); 205 /* we need to clear these to -1 and not zero - otherwise,
162 free_socket_images (); 206 * if a player quits and starts a new character, we wont
163} 207 * send new values to the client, as things like exp start
164 208 * at zero.
165/**
166 * Frees a socket.
167 * Basically, all we need to do here is free all data structures that
168 * might be associated with the socket. It is up to the caller to
169 * update the list
170 */ 209 */
210 for (int i = 0; i < ecb_array_length (last_skill_exp); i++)
211 last_skill_exp[i] = -1;
171 212
172void 213 for (int i = 0; i < ecb_array_length (last_resist); i++)
173free_newsocket (client_socket *ns) 214 last_resist[i] = -1;
174{
175 if (ns->fd >= 0)
176 close (ns->fd);
177 215
178 if (ns->stats.range) 216 last_weapon_sp = -1;
179 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;
180 227
181 if (ns->stats.title) 228 static living zero_living;
182 free (ns->stats.title); 229 last_stats = zero_living;
183
184 free (ns->host);
185
186 ns->fd = -1;
187 ns->stats.range = 0;
188 ns->stats.title = 0;
189 ns->host = 0;
190} 230}
191 231
192/** Sends the 'goodbye' command to the player, and closes connection. */ 232client *
193void
194final_free_player (player *pl)
195{
196 pl->socket->send_packet ("goodbye");
197 free_newsocket (pl->socket);
198 free_player (pl);
199}
200
201bool
202add_client_socket (int fd, const char *peername) 233client::create (int fd, const char *peername)
203{ 234{
204 if (checkbanned (NULL, peername))
205 {
206 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
207 return false;
208 }
209 else
210 {
211 client_socket *ns = new client_socket (dup (fd), peername); 235 client *ns = new client (dup (fd), peername);
212 client_sockets.push_back (ns);
213 return true;
214 }
215}
216 236
237 ns->instantiate (); // effectively a nop right now
238
239 return ns;
240}
241

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