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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 1.62 by root, Mon Oct 12 14:00:59 2009 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 (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
4 Copyright (C) 2001 Mark Wedel 5 * Copyright (©) 2001,2007 Mark Wedel
5 Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
6 7 *
7 This program is free software; you can redistribute it and/or modify 8 * 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 9 * 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 10 * Free Software Foundation, either version 3 of the License, or (at your
10 (at your option) any later version. 11 * option) any later version.
11 12 *
12 This program is distributed in the hope that it will be useful, 13 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 16 * GNU General Public License for more details.
16 17 *
17 You should have received a copy of the GNU General Public License 18 * 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 19 * and the GNU General Public License along with this program. If not, see
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * <http://www.gnu.org/licenses/>.
20 21 *
21 The author can be reached via e-mail to <crossfire@schmorp.de> 22 * The authors can be reached via e-mail to <support@deliantra.net>
22*/ 23 */
23 24
24/** 25/**
25 * \file 26 * \file
26 * Socket general functions 27 * Socket general functions
27 * 28 *
… …
30 * Mainly deals with initialization and higher level socket 31 * Mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 32 * maintenance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c 33 * The reading of data is handled in ericserver.c
33 */ 34 */
34 35
35
36#include <global.h> 36#include <global.h>
37#include <sproto.h> 37#include <sproto.h>
38#include <sys/types.h> 38#include <sys/types.h>
39#include <sys/time.h> 39#include <sys/time.h>
40#include <sys/socket.h> 40#include <sys/socket.h>
41#include <netinet/in.h> 41#include <netinet/in.h>
42#include <netinet/tcp.h>
43#include <netinet/ip.h>
42#include <netdb.h> 44#include <netdb.h>
43 45
44#ifdef HAVE_UNISTD_H
45# include <unistd.h> 46#include <unistd.h>
46#endif
47
48#ifdef HAVE_ARPA_INET_H
49# include <arpa/inet.h> 47#include <arpa/inet.h>
50#endif
51#include <newserver.h>
52 48
53Socket_Info socket_info; 49#include <algorithm>
54NewSocket *init_sockets; 50
51// use relatively small values, as we do not expect to receive much,
52// and we do userspace write buffering
53// 8kb limits throughput to roughly 66kb/s
54#define SOCKET_RCVBUF 8192
55#define SOCKET_SNDBUF 16384
56
57sockvec clients;
55 58
56/** 59/**
57 * Initializes a connection. Really, it just sets up the data structure, 60 * Initializes a connection. Really, it just sets up the data structure,
58 * socket setup is handled elsewhere. We do send a version to the 61 * socket setup is handled elsewhere. We do send a version to the
59 * client. 62 * client.
60 */ 63 */
61void 64client::client (int fd, const char *peername)
62InitConnection (NewSocket *ns, const char *from_ip) 65: fd (fd), host (strdup (peername)),
66 socket_ev (this, &client::socket_cb)
63{ 67{
64 SockList sl; 68 refcnt_inc (); // the socket is an external reference
65 char buf[256];
66 int bufsize = 65535; /*Supposed absolute upper limit */
67 int oldbufsize;
68 int buflen = sizeof (int);
69 69
70 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
71
72 socket_timeout = 16.;
73
74 {
75 struct linger linger_opt;
76
77 linger_opt.l_onoff = 0;
78 linger_opt.l_linger = 0;
79
80 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
81 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
82 }
83
84 {
85 int val;
86
87#ifdef SO_RCVBUF
88 val = SOCKET_RCVBUF;
89 if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
90 LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
91#endif
92
93#ifdef SO_SNDBUF
94 val = SOCKET_SNDBUF;
95 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
96 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
97#endif
98
99#ifdef IP_TOS
100 val = IPTOS_LOWDELAY;
101 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
102 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
103#endif
104
105#ifdef TCP_NODELAY
106 val = 1;
107 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
108 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
109#endif
110
111 // set some very aggressive keepalive parameters
112#ifdef TCP_KEEPIDLE
113 val = 1;
114 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
115 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
116#endif
117
118#ifdef TCP_KEEPCNT
119 val = 3;
120 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
121 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
122#endif
123
124#ifdef TCP_KEEPINTVL
125 val = 1;
126 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
127 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
128#endif
129
130 // try to find the mss value in use
131#ifdef TCP_MAXSEG
132 socklen_t sl = sizeof (val);
133 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
134 mss = val;
135#endif
136 }
137
70 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 138 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
71 LOG (llevError, "InitConnection: Error on fcntl.\n"); 139 LOG (llevError, "InitConnection: Error on fcntl.\n");
72 140
73 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 141 state = ST_SETUP;
74 oldbufsize = 0;
75
76 if (oldbufsize < bufsize)
77 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
78 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
79
80 buflen = sizeof (oldbufsize);
81 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
82#ifdef ESRV_DEBUG
83 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
84#endif
85
86 ns->faceset = 0;
87 ns->facecache = 0;
88 ns->image2 = 0;
89 ns->sound = 0;
90 ns->exp64 = 0;
91 ns->monitor_spells = 0;
92 ns->mapmode = Map0Cmd; 142 mapmode = Map1aCmd;
93 ns->darkness = 1;
94 ns->status = Ns_Add;
95 ns->mapx = 11; 143 mapx = 11;
96 ns->mapy = 11; 144 mapy = 11;
97 ns->newmapcmd = 0;
98 ns->itemcmd = 1; /* Default is version item1 command */ 145 itemcmd = 1; /* Default is version item1 command */
99 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 146 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
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;
109 147
110 /* we should really do some checking here - if total clients overflows
111 * we need to do something more intelligent, because client id's will start
112 * duplicating (not likely in normal cases, but malicous attacks that
113 * just open and close connections could get this total up.
114 */
115 ns->inbuf_len = 0;
116
117 /* Basic initialization. Needed because we do a check in
118 * HandleClient for oldsocketmode without checking the
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 148 /* 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 149 * this face. Face 0 is sent to the client to say clear
127 * face information. 150 * face information.
128 */ 151 */
129 ns->faces_sent[0] = NS_FACESENT_FACE; 152 faces_sent[0] = true;
153 fx_want [FT_FACE] = true; // all clients must support image faces
130 154
131 ns->outputbuffer.start = 0; 155 socket_ev.set (fd, EV_READ);
132 ns->outputbuffer.len = 0; 156 socket_ev.prio (2); // one higher than the ticker priority
133 ns->can_write = 1; 157 socket_ev.start ();
134 ns->password_fails = 0;
135 158
136 ns->current_map = 0; 159 // initialisation done, kick it!
137 ns->current_x = 0;
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); 160 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
145 sl.buf = (unsigned char *) buf; 161 flush ();
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}
155 162
163 reset_stats ();
156 164
157/** This sets up the socket and reads all the image information into memory. */ 165 clients.insert (this);
166}
167
168client::~client ()
169{
170 clients.erase (this);
171
172 mapinfo_queue_clear ();
173 free (stats.range);
174 free (stats.title);
175 free (host);
176}
177
158void 178void
159init_ericserver (void) 179client::do_destroy ()
160{ 180{
161 struct sockaddr_in insock; 181 attachable::do_destroy ();
162 struct protoent *protox;
163 struct linger linger_opt;
164 182
165 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 183 if (pl)
184 pl->disconnect ();
166 185
167 socket_info.timeout.tv_sec = 0; 186 if (fd >= 0)
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 {
187 LOG (llevError, "init_ericserver: Error getting protox\n"); 188 send_packet ("goodbye");
188 return; 189 flush ();
190
191 close (fd);
189 } 192 }
190 193
191 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); 194 state = ST_DEAD;
192 if (init_sockets[0].fd == -1)
193 {
194 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
195 exit (-1);
196 }
197 195
198 insock.sin_family = AF_INET; 196 socket_ev.stop ();
199 insock.sin_port = htons (settings.csport);
200 insock.sin_addr.s_addr = htonl (INADDR_ANY);
201 197
202 linger_opt.l_onoff = 0; 198 refcnt_dec (); // socket no longer open
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} 199}
231 200
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 201void
241free_all_newserver (void) 202client::reset_stats ()
242{ 203{
243 LOG (llevDebug, "Freeing all new client/server information.\n"); 204 /* we need to clear these to -1 and not zero - otherwise,
244 free_socket_images (); 205 * if a player quits and starts a new character, we wont
245 free (init_sockets); 206 * send new values to the client, as things like exp start
246} 207 * at zero.
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 */ 208 */
209 for (int i = 0; i < NUM_SKILLS; i++)
210 last_skill_exp[i] = -1;
254 211
255void 212 for (int i = 0; i < NROFATTACKS; i++)
256free_newsocket (NewSocket *ns) 213 last_resist[i] = -1;
257{
258 close (ns->fd);
259 214
260 if (ns->stats.range) 215 last_weapon_sp = -1;
261 free (ns->stats.range); 216 last_level = -1;
217 last_stats.exp = -1;
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;
262 226
263 if (ns->stats.title) 227 static living zero_living;
264 free (ns->stats.title); 228 last_stats = zero_living;
265
266 free (ns->host);
267} 229}
268 230
269/** Sends the 'goodbye' command to the player, and closes connection. */ 231client *
270void 232client::create (int fd, const char *peername)
271final_free_player (player *pl)
272{ 233{
273 cs_write_string (&pl->socket, "goodbye", 8); 234 client *ns = new client (dup (fd), peername);
274 free_newsocket (&pl->socket); 235 ns->instantiate (); // effectively a nop right now
275 free_player (pl); 236 INVOKE_CLIENT (CONNECT, ns);
237 return ns;
276} 238}
239

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