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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.13 by root, Thu Dec 14 01:12:35 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
53Socket_Info socket_info; 41#include <algorithm>
54NewSocket *init_sockets; 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
49sockvec clients;
55 50
56/** 51/**
57 * Initializes a connection. Really, it just sets up the data structure, 52 * Initializes a connection. Really, it just sets up the data structure,
58 * 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
59 * client. 54 * client.
60 */ 55 */
56client::client (int fd, const char *peername)
57: fd (fd), host (strdup (peername)),
58 socket_ev (this, &client::socket_cb)
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
66 {
67 struct linger linger_opt;
68
69 linger_opt.l_onoff = 0;
70 linger_opt.l_linger = 0;
71
72 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
73 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
74 }
75
76 {
77 int val;
78
79#ifdef SO_RCVBUF
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
84
85#ifdef SO_SNDBUF
86 val = SOCKET_SNDBUF;
87 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
88 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
89#endif
90
91#ifdef IP_TOS
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
128 }
129
130 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
131 LOG (llevError, "InitConnection: Error on fcntl.\n");
132
133 state = ST_SETUP;
134 mapx = 11;
135 mapy = 11;
136 itemcmd = 1; /* Default is version item1 command */
137 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
138
139 /* Do this so we don't send a face command for the client for
140 * this face. Face 0 is sent to the client to set meta data
141 * for following faces in fx.
142 */
143 faces_sent[0] = true;
144 fx_want [FT_IMAGE] = true; // all clients must support image faces
145
146 socket_ev.set (fd, EV_READ);
147 socket_ev.prio (2); // one higher than the ticker priority
148 socket_ev.start ();
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
61void 169void
62InitConnection (NewSocket *ns, const char *from_ip) 170client::run ()
63{ 171{
64 int bufsize = 65535; /*Supposed absolute upper limit */ 172 // initialisation done, kick it!
65 int oldbufsize; 173 INVOKE_CLIENT (CONNECT, this);
66 int buflen = sizeof (int);
67 174
68 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 175 flush ();
69 LOG (llevError, "InitConnection: Error on fcntl.\n"); 176}
70 177
71 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 178void
72 oldbufsize = 0; 179client::do_destroy ()
180{
181 INVOKE_CLIENT (CLIENT_DESTROY, this);
182 attachable::do_destroy ();
73 183
74 if (oldbufsize < bufsize) 184 if (pl)
75 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 185 pl->disconnect ();
76 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
77 186
78 buflen = sizeof (oldbufsize); 187 if (fd >= 0)
79 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 188 {
80#ifdef ESRV_DEBUG 189 send_packet ("goodbye");
81 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); 190 flush ();
82#endif
83 191
84 ns->faceset = 0; 192 close (fd);
85 ns->facecache = 0; 193 }
86 ns->image2 = 0;
87 ns->sound = 0;
88 ns->exp64 = 0;
89 ns->monitor_spells = 0;
90 ns->mapmode = Map0Cmd;
91 ns->darkness = 1;
92 ns->status = Ns_Add;
93 ns->mapx = 11;
94 ns->mapy = 11;
95 ns->newmapcmd = 0;
96 ns->itemcmd = 1; /* Default is version item1 command */
97 ns->ext_mapinfos = 0; /*extendedmapinfo datas */
98 ns->EMI_smooth = 0;
99 ns->look_position = 0;
100 ns->update_look = 0;
101 ns->has_readable_type = 0;
102 ns->supported_readables = 0;
103 ns->monitor_spells = 0;
104 ns->mapinfocmd = 0;
105 ns->extcmd = 0;
106 ns->extmap = 0;
107 194
108 /* we should really do some checking here - if total clients overflows 195 state = ST_DEAD;
109 * we need to do something more intelligent, because client id's will start 196
110 * duplicating (not likely in normal cases, but malicous attacks that 197 socket_ev.stop ();
111 * just open and close connections could get this total up. 198
199 refcnt_dec (); // socket no longer open
200}
201
202void
203client::reset_stats ()
204{
205 /* we need to clear these to -1 and not zero - otherwise,
206 * if a player quits and starts a new character, we wont
207 * send new values to the client, as things like exp start
208 * at zero.
112 */ 209 */
113 ns->inbuf_len = 0; 210 for (int i = 0; i < ecb_array_length (last_skill_exp); i++)
211 last_skill_exp[i] = -1;
114 212
115 /* Basic initialization. Needed because we do a check in 213 for (int i = 0; i < ecb_array_length (last_resist); i++)
116 * HandleClient for oldsocketmode without checking the 214 last_resist[i] = -1;
117 * length of data.
118 */
119 memset (&ns->lastmap, 0, sizeof (struct Map));
120 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
121 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
122 memset (&ns->stats, 0, sizeof (struct statsinfo));
123 /* Do this so we don't send a face command for the client for
124 * this face. Face 0 is sent to the client to say clear
125 * face information.
126 */
127 ns->faces_sent[0] = NS_FACESENT_FACE;
128 215
129 ns->outputbuffer.start = 0; 216 last_weapon_sp = -1;
130 ns->outputbuffer.len = 0; 217 last_level = -1;
131 ns->can_write = 1; 218 last_stats.exp = -1;
132 ns->password_fails = 0; 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;
133 227
134 ns->current_map = 0; 228 static living zero_living;
135 ns->current_x = 0; 229 last_stats = zero_living;
136 ns->current_y = 0;
137 ns->client[0] = 0;
138 ns->buggy_mapscroll = 0;
139
140 ns->sent_scroll = 0;
141 ns->host = strdup_local (from_ip);
142
143 {
144 SockList sl (MAXSOCKBUF);
145
146 sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
147 Send_With_Handling (ns, &sl);
148 sl.free ();
149 }
150
151#ifdef CS_LOGSTATS
152 if (socket_info.nconns > cst_tot.max_conn)
153 cst_tot.max_conn = socket_info.nconns;
154 if (socket_info.nconns > cst_lst.max_conn)
155 cst_lst.max_conn = socket_info.nconns;
156#endif
157} 230}
158 231
159 232client *
160/** This sets up the socket and reads all the image information into memory. */ 233client::create (int fd, const char *peername)
161void
162init_ericserver (void)
163{ 234{
164 struct sockaddr_in insock; 235 client *ns = new client (dup (fd), peername);
165 struct protoent *protox;
166 struct linger linger_opt;
167 236
168 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 237 ns->instantiate (); // effectively a nop right now
169 238
170 socket_info.timeout.tv_sec = 0; 239 return ns;
171 socket_info.timeout.tv_usec = 0;
172 socket_info.nconns = 0;
173
174#ifdef CS_LOGSTATS
175 memset (&cst_tot, 0, sizeof (CS_Stats));
176 memset (&cst_lst, 0, sizeof (CS_Stats));
177 cst_tot.time_start = time (NULL);
178 cst_lst.time_start = time (NULL);
179#endif
180
181 LOG (llevDebug, "Initialize new client/server data\n");
182 socket_info.nconns = 1;
183 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
184 init_sockets[0].faces_sent = NULL; /* unused */
185 socket_info.allocated_sockets = 1;
186
187 protox = getprotobyname ("tcp");
188 if (protox == NULL)
189 {
190 LOG (llevError, "init_ericserver: Error getting protox\n");
191 return;
192 }
193
194 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
195 if (init_sockets[0].fd == -1)
196 {
197 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
198 exit (-1);
199 }
200
201 insock.sin_family = AF_INET;
202 insock.sin_port = htons (settings.csport);
203 insock.sin_addr.s_addr = htonl (INADDR_ANY);
204
205 linger_opt.l_onoff = 0;
206 linger_opt.l_linger = 0;
207 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
208 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
209
210 {
211 int tmp = 1;
212
213 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
214 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
215 }
216
217 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
218 {
219 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
220 close (init_sockets[0].fd);
221 exit (-1);
222 }
223
224 if (listen (init_sockets[0].fd, 5) == (-1))
225 {
226 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
227 close (init_sockets[0].fd);
228 exit (-1);
229 }
230
231 init_sockets[0].status = Ns_Add;
232 read_client_images ();
233} 240}
234 241
235
236/*******************************************************************************
237 *
238 * Start of functions dealing with freeing of the data.
239 *
240 ******************************************************************************/
241
242/** Free's all the memory that ericserver allocates. */
243void
244free_all_newserver (void)
245{
246 LOG (llevDebug, "Freeing all new client/server information.\n");
247 free_socket_images ();
248 free (init_sockets);
249}
250
251/**
252 * Frees a socket.
253 * Basically, all we need to do here is free all data structures that
254 * might be associated with the socket. It is up to the caller to
255 * update the list
256 */
257
258void
259free_newsocket (NewSocket *ns)
260{
261 close (ns->fd);
262
263 if (ns->stats.range)
264 free (ns->stats.range);
265
266 if (ns->stats.title)
267 free (ns->stats.title);
268
269 free (ns->host);
270}
271
272/** Sends the 'goodbye' command to the player, and closes connection. */
273void
274final_free_player (player *pl)
275{
276 pl->socket.send_packet ("goodbye");
277 free_newsocket (&pl->socket);
278 free_player (pl);
279}
280

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