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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 1.52 by root, Mon Oct 1 01:09:10 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT 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 * Crossfire TRT is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by 9 * it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or 10 * the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version. 11 * (at your 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 GNU General Public License
18 along with this program; if not, write to the Free Software 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 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 <crossfire@schmorp.de>
22*/ 22 */
23 23
24/** 24/**
25 * \file 25 * \file
26 * Socket general functions 26 * Socket general functions
27 * 27 *
… …
30 * Mainly deals with initialization and higher level socket 30 * Mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 31 * maintenance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c 32 * The reading of data is handled in ericserver.c
33 */ 33 */
34 34
35
36#include <global.h> 35#include <global.h>
37#include <sproto.h> 36#include <sproto.h>
38#include <sys/types.h> 37#include <sys/types.h>
39#include <sys/time.h> 38#include <sys/time.h>
40#include <sys/socket.h> 39#include <sys/socket.h>
41#include <netinet/in.h> 40#include <netinet/in.h>
41#include <netinet/tcp.h>
42#include <netinet/ip.h>
42#include <netdb.h> 43#include <netdb.h>
43 44
44#ifdef HAVE_UNISTD_H
45# include <unistd.h> 45#include <unistd.h>
46#endif
47
48#ifdef HAVE_ARPA_INET_H
49# include <arpa/inet.h> 46#include <arpa/inet.h>
50#endif
51#include <newserver.h>
52 47
53Socket_Info socket_info; 48#include <algorithm>
54NewSocket *init_sockets; 49
50// use relatively small values, as we do not expect to receive much,
51// and we do userspace write buffering
52// 8kb limits throughput to roughly 66kb/s
53#define SOCKET_RCVBUF 8192
54#define SOCKET_SNDBUF 16384
55
56sockvec clients;
55 57
56/** 58/**
57 * Initializes a connection. Really, it just sets up the data structure, 59 * Initializes a connection. Really, it just sets up the data structure,
58 * socket setup is handled elsewhere. We do send a version to the 60 * socket setup is handled elsewhere. We do send a version to the
59 * client. 61 * client.
60 */ 62 */
61void 63client::client (int fd, const char *peername)
62InitConnection (NewSocket *ns, const char *from_ip) 64: fd (fd), host (strdup (peername)),
65 socket_ev (this, &client::socket_cb)
63{ 66{
67 refcnt_inc (); // the socket is an external reference
68
69 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
70
71 {
72 struct linger linger_opt;
73
74 linger_opt.l_onoff = 0;
75 linger_opt.l_linger = 0;
76
77 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
78 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
79 }
80
81 {
82 int val;
83
84#ifdef SO_RCVBUF
85 val = SOCKET_RCVBUF;
86 if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
87 LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
88#endif
89
90#ifdef SO_SNDBUF
91 val = SOCKET_SNDBUF;
92 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
93 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
94#endif
95
96#ifdef IP_TOS
97 val = IPTOS_LOWDELAY;
98 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
99 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
100#endif
101
102#ifdef TCP_NODELAY
103 val = 1;
104 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
105 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
106#endif
107
108 // set some very aggressive keepalive parameters
109#ifdef TCP_KEEPIDLE
110 val = 1;
111 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
112 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
113#endif
114
115#ifdef TCP_KEEPCNT
116 val = 3;
117 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
118 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
119#endif
120
121#ifdef TCP_KEEPINTVL
122 val = 1;
123 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
124 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
125#endif
126
127 // try to find the mss value in use
128#ifdef TCP_MAXSEG
129 socklen_t sl = sizeof (val);
130 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
131 mss = val;
132#endif
133 }
134
135 {
64 int bufsize = 65535; /*Supposed absolute upper limit */ 136 int bufsize = 65535; /*Supposed absolute upper limit */
65 int oldbufsize; 137 int oldbufsize;
66 int buflen = sizeof (int); 138 int buflen = sizeof (int);
67 139
68 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 140 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
69 LOG (llevError, "InitConnection: Error on fcntl.\n"); 141 LOG (llevError, "InitConnection: Error on fcntl.\n");
70 142
71 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 143 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
72 oldbufsize = 0; 144 oldbufsize = 0;
73 145
74 if (oldbufsize < bufsize) 146 if (oldbufsize < bufsize)
75 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 147 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
76 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); 148 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
77 149
78 buflen = sizeof (oldbufsize); 150 buflen = sizeof (oldbufsize);
79 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 151 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
80#ifdef ESRV_DEBUG 152 }
81 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
82#endif
83 153
84 ns->faceset = 0; 154 state = ST_SETUP;
85 ns->facecache = 0;
86 ns->image2 = 0;
87 ns->sound = 0;
88 ns->exp64 = 0;
89 ns->monitor_spells = 0;
90 ns->mapmode = Map0Cmd; 155 mapmode = Map0Cmd;
91 ns->darkness = 1; 156 darkness = 1;
92 ns->status = Ns_Add;
93 ns->mapx = 11; 157 mapx = 11;
94 ns->mapy = 11; 158 mapy = 11;
95 ns->newmapcmd = 0;
96 ns->itemcmd = 1; /* Default is version item1 command */ 159 itemcmd = 1; /* Default is version item1 command */
97 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 160 max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
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;
107 161
108 /* we should really do some checking here - if total clients overflows
109 * we need to do something more intelligent, because client id's will start
110 * duplicating (not likely in normal cases, but malicous attacks that
111 * just open and close connections could get this total up.
112 */
113 ns->inbuf_len = 0;
114
115 /* Basic initialization. Needed because we do a check in
116 * HandleClient for oldsocketmode without checking the
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 162 /* 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 163 * this face. Face 0 is sent to the client to say clear
125 * face information. 164 * face information.
126 */ 165 */
127 ns->faces_sent[0] = NS_FACESENT_FACE; 166 faces_sent[0] = true;
167 fx_want [FT_FACE] = true; // all clients must support image faces
128 168
129 ns->outputbuffer.start = 0; 169 socket_ev.prio (PE_PRIO_HIGH);
130 ns->outputbuffer.len = 0; 170 socket_ev.fd (fd);
131 ns->can_write = 1; 171 socket_ev.poll (PE_R);
132 ns->password_fails = 0;
133 172
134 ns->current_map = 0; 173 // initialisation done, kick it!
135 ns->current_x = 0;
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); 174 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
147 Send_With_Handling (ns, &sl); 175 flush ();
148 sl.free ();
149 }
150 176
151#ifdef CS_LOGSTATS 177 reset_stats ();
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}
158 178
179 clients.insert (this);
180}
159 181
160/** This sets up the socket and reads all the image information into memory. */ 182client::~client ()
183{
184 clients.erase (this);
185
186 mapinfo_queue_clear ();
187 free (stats.range);
188 free (stats.title);
189 free (host);
190}
191
161void 192void
162init_ericserver (void) 193client::do_destroy ()
163{ 194{
164 struct sockaddr_in insock; 195 attachable::do_destroy ();
165 struct protoent *protox;
166 struct linger linger_opt;
167 196
168 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 197 if (pl)
198 pl->disconnect ();
169 199
170 socket_info.timeout.tv_sec = 0; 200 if (fd >= 0)
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 { 201 {
190 LOG (llevError, "init_ericserver: Error getting protox\n"); 202 send_packet ("goodbye");
191 return; 203 flush ();
204
205 close (fd);
192 } 206 }
193 207
194 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); 208 state = ST_DEAD;
195 if (init_sockets[0].fd == -1)
196 {
197 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
198 exit (-1);
199 }
200 209
201 insock.sin_family = AF_INET; 210 socket_ev.suspend ();
202 insock.sin_port = htons (settings.csport);
203 insock.sin_addr.s_addr = htonl (INADDR_ANY);
204 211
205 linger_opt.l_onoff = 0; 212 refcnt_dec (); // socket no longer open
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} 213}
234 214
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 215void
244free_all_newserver (void) 216client::reset_stats ()
245{ 217{
246 LOG (llevDebug, "Freeing all new client/server information.\n"); 218 /* we need to clear these to -1 and not zero - otherwise,
247 free_socket_images (); 219 * if a player quits and starts a new character, we wont
248 free (init_sockets); 220 * send new values to the client, as things like exp start
249} 221 * at zero.
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 */ 222 */
223 for (int i = 0; i < NUM_SKILLS; i++)
224 last_skill_exp[i] = -1;
257 225
258void 226 for (int i = 0; i < NROFATTACKS; i++)
259free_newsocket (NewSocket *ns) 227 last_resist[i] = -1;
260{
261 close (ns->fd);
262 228
263 if (ns->stats.range) 229 last_weapon_sp = -1;
264 free (ns->stats.range); 230 last_level = -1;
231 last_stats.exp = -1;
232 last_weight = (uint32) - 1;
233 last_flags = 0;
234 last_weight = 0;
235 last_weight_limit = 0;
236 last_path_attuned = 0;
237 last_path_repelled = 0;
238 last_path_denied = 0;
239 last_speed = 0;
240 last_flags = 0;
265 241
266 if (ns->stats.title) 242 static living zero_living;
267 free (ns->stats.title); 243 last_stats = zero_living;
268
269 free (ns->host);
270} 244}
271 245
272/** Sends the 'goodbye' command to the player, and closes connection. */ 246client *
273void 247client::create (int fd, const char *peername)
274final_free_player (player *pl)
275{ 248{
276 pl->socket.send_packet ("goodbye"); 249 client *ns = new client (dup (fd), peername);
277 free_newsocket (&pl->socket); 250 ns->instantiate (); // effectively a nop right now
278 free_player (pl); 251 INVOKE_CLIENT (CONNECT, ns);
252 return ns;
279} 253}
280 254

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