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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 1.48 by root, Sat Jun 9 23:18:17 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game.
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 it
8 it under the terms of the GNU General Public License as published by 9 * under the terms of the GNU General Public License as published by the Free
9 the Free Software Foundation; either version 2 of the License, or 10 * Software Foundation; either version 2 of the License, or (at your option)
10 (at your option) any later version. 11 * 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, but
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 GNU General Public License for more details. 16 * 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 along
18 along with this program; if not, write to the Free Software 19 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 <crossfire@schmorp.de>
22*/ 23 */
23 24
24/** 25/**
25 * \file 26 * \file
26 * Socket general functions 27 * Socket general functions
27 * 28 *
… …
29 * 30 *
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),
67 cmd_ev (this, &client::cmd_cb)
63{ 68{
64 SockList sl; 69 refcnt_inc (); // the socket is an external reference
65 char buf[256]; 70
71 mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
72
73 {
74 struct linger linger_opt;
75
76 linger_opt.l_onoff = 0;
77 linger_opt.l_linger = 0;
78
79 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
80 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
81 }
82
83 {
84 int val;
85
86#ifdef SO_RCVBUF
87 val = SOCKET_RCVBUF;
88 if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
89 LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
90#endif
91
92#ifdef SO_SNDBUF
93 val = SOCKET_SNDBUF;
94 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
95 LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
96#endif
97
98#ifdef IP_TOS
99 val = IPTOS_LOWDELAY;
100 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
101 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
102#endif
103
104#ifdef TCP_NODELAY
105 val = 1;
106 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
107 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
108#endif
109
110 // set some very aggressive keepalive parameters
111#ifdef TCP_KEEPIDLE
112 val = 1;
113 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
114 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
115#endif
116
117#ifdef TCP_KEEPCNT
118 val = 3;
119 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
120 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
121#endif
122
123#ifdef TCP_KEEPINTVL
124 val = 1;
125 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
126 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
127#endif
128
129 // try to find the mss value in use
130#ifdef TCP_MAXSEG
131 socklen_t sl = sizeof (val);
132 if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
133 mss = val;
134#endif
135 }
136
137 {
66 int bufsize = 65535; /*Supposed absolute upper limit */ 138 int bufsize = 65535; /*Supposed absolute upper limit */
67 int oldbufsize; 139 int oldbufsize;
68 int buflen = sizeof (int); 140 int buflen = sizeof (int);
69 141
70 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 142 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
71 LOG (llevError, "InitConnection: Error on fcntl.\n"); 143 LOG (llevError, "InitConnection: Error on fcntl.\n");
72 144
73 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 145 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
74 oldbufsize = 0; 146 oldbufsize = 0;
75 147
76 if (oldbufsize < bufsize) 148 if (oldbufsize < bufsize)
77 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 149 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
78 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); 150 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
79 151
80 buflen = sizeof (oldbufsize); 152 buflen = sizeof (oldbufsize);
81 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 153 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
82#ifdef ESRV_DEBUG 154 }
83 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
84#endif
85 155
86 ns->faceset = 0; 156 state = ST_SETUP;
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; 157 mapmode = Map0Cmd;
93 ns->darkness = 1; 158 darkness = 1;
94 ns->status = Ns_Add;
95 ns->mapx = 11; 159 mapx = 11;
96 ns->mapy = 11; 160 mapy = 11;
97 ns->newmapcmd = 0;
98 ns->itemcmd = 1; /* Default is version item1 command */ 161 itemcmd = 1; /* Default is version item1 command */
99 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 162 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;
109 163
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 164 /* 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 165 * this face. Face 0 is sent to the client to say clear
127 * face information. 166 * face information.
128 */ 167 */
129 ns->faces_sent[0] = NS_FACESENT_FACE; 168 faces_sent[0] = true;
130 169
131 ns->outputbuffer.start = 0; 170 socket_ev.prio (PE_PRIO_NORMAL);
132 ns->outputbuffer.len = 0; 171 socket_ev.fd (fd);
133 ns->can_write = 1; 172 socket_ev.poll (PE_R);
134 ns->password_fails = 0;
135 173
136 ns->current_map = 0; 174 cmd_ev.prio (PE_PRIO_NORMAL);
137 ns->current_x = 0;
138 ns->current_y = 0;
139 ns->client[0] = 0;
140 ns->buggy_mapscroll = 0;
141 175
142 ns->sent_scroll = 0; 176 // initialisation done, kick it!
143 ns->host = strdup_local (from_ip);
144 sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 177 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
145 sl.buf = (unsigned char *) buf; 178 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}
155 179
180 reset_stats ();
156 181
157/** This sets up the socket and reads all the image information into memory. */ 182 clients.insert (this);
183}
184
185client::~client ()
186{
187 clients.erase (this);
188
189 free (stats.range);
190 free (stats.title);
191 free (host);
192}
193
158void 194void
159init_ericserver (void) 195client::do_destroy ()
160{ 196{
161 struct sockaddr_in insock; 197 attachable::do_destroy ();
162 struct protoent *protox;
163 struct linger linger_opt;
164 198
165 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 199 if (pl)
200 pl->disconnect ();
166 201
167 socket_info.timeout.tv_sec = 0; 202 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 { 203 {
187 LOG (llevError, "init_ericserver: Error getting protox\n"); 204 send_packet ("goodbye");
188 return; 205 flush ();
206
207 close (fd);
189 } 208 }
190 209
191 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); 210 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 }
197 211
198 insock.sin_family = AF_INET; 212 socket_ev.suspend ();
199 insock.sin_port = htons (settings.csport); 213 cmd_ev.suspend ();
200 insock.sin_addr.s_addr = htonl (INADDR_ANY);
201 214
202 linger_opt.l_onoff = 0; 215 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} 216}
231 217
218void
219client::reset_stats ()
220{
221 /* we need to clear these to -1 and not zero - otherwise,
222 * if a player quits and starts a new character, we wont
223 * send new values to the client, as things like exp start
224 * at zero.
225 */
226 for (int i = 0; i < NUM_SKILLS; i++)
227 last_skill_exp[i] = -1;
228
229 for (int i = 0; i < NROFATTACKS; i++)
230 last_resist[i] = -1;
231
232 last_weapon_sp = -1;
233 last_level = -1;
234 last_stats.exp = -1;
235 last_weight = (uint32) - 1;
236 last_flags = 0;
237 last_weight = 0;
238 last_weight_limit = 0;
239 last_path_attuned = 0;
240 last_path_repelled = 0;
241 last_path_denied = 0;
242 last_speed = 0;
243 last_flags = 0;
244
245 static living zero_living;
246 last_stats = zero_living;
247}
232 248
233/******************************************************************************* 249/*******************************************************************************
234 * 250 *
235 * Start of functions dealing with freeing of the data. 251 * Start of functions dealing with freeing of the data.
236 * 252 *
… …
240void 256void
241free_all_newserver (void) 257free_all_newserver (void)
242{ 258{
243 LOG (llevDebug, "Freeing all new client/server information.\n"); 259 LOG (llevDebug, "Freeing all new client/server information.\n");
244 free_socket_images (); 260 free_socket_images ();
245 free (init_sockets);
246} 261}
247 262
248/** 263client *
249 * Frees a socket. 264client::create (int fd, const char *peername)
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 */
254
255void
256free_newsocket (NewSocket *ns)
257{ 265{
258 close (ns->fd); 266 client *ns = new client (dup (fd), peername);
259 267 ns->instantiate (); // effectively a nop right now
260 if (ns->stats.range) 268 INVOKE_CLIENT (CONNECT, ns);
261 free (ns->stats.range); 269 return ns;
262
263 if (ns->stats.title)
264 free (ns->stats.title);
265
266 free (ns->host);
267} 270}
268 271
269/** Sends the 'goodbye' command to the player, and closes connection. */
270void
271final_free_player (player *pl)
272{
273 cs_write_string (&pl->socket, "goodbye", 8);
274 free_newsocket (&pl->socket);
275 free_player (pl);
276}

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