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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.11 by root, Wed Dec 13 02:55:51 2006 UTC vs.
Revision 1.54 by root, Wed Nov 14 08:09:46 2007 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 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
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 authors can be reached via e-mail to <support@deliantra.net>
21 The author 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{
64 SockList sl; 67 refcnt_inc (); // the socket is an external reference
65 char buf[256]; 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 {
66 int bufsize = 65535; /*Supposed absolute upper limit */ 136 int bufsize = 65535; /*Supposed absolute upper limit */
67 int oldbufsize; 137 int oldbufsize;
68 int buflen = sizeof (int); 138 int buflen = sizeof (int);
69 139
70 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 140 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
71 LOG (llevError, "InitConnection: Error on fcntl.\n"); 141 LOG (llevError, "InitConnection: Error on fcntl.\n");
72 142
73 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)
74 oldbufsize = 0; 144 oldbufsize = 0;
75 145
76 if (oldbufsize < bufsize) 146 if (oldbufsize < bufsize)
77 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 147 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); 148 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
79 149
80 buflen = sizeof (oldbufsize); 150 buflen = sizeof (oldbufsize);
81 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 151 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
82#ifdef ESRV_DEBUG 152 }
83 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
84#endif
85 153
86 ns->faceset = 0; 154 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; 155 mapmode = Map0Cmd;
93 ns->darkness = 1; 156 darkness = 1;
94 ns->status = Ns_Add;
95 ns->mapx = 11; 157 mapx = 11;
96 ns->mapy = 11; 158 mapy = 11;
97 ns->newmapcmd = 0;
98 ns->itemcmd = 1; /* Default is version item1 command */ 159 itemcmd = 1; /* Default is version item1 command */
99 ns->ext_mapinfos = 0; /*extendedmapinfo datas */ 160 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;
109 161
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 ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF);
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->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF);
122 memset (&ns->lastmap, 0, sizeof (struct Map));
123 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
124 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
125 memset (&ns->stats, 0, sizeof (struct statsinfo));
126 /* 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
127 * 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
128 * face information. 164 * face information.
129 */ 165 */
130 ns->faces_sent[0] = NS_FACESENT_FACE; 166 faces_sent[0] = true;
167 fx_want [FT_FACE] = true; // all clients must support image faces
131 168
132 ns->outputbuffer.start = 0; 169 socket_ev.set (fd, EV_READ);
133 ns->outputbuffer.len = 0; 170 socket_ev.start ();
134 ns->can_write = 1;
135 ns->password_fails = 0;
136 171
137 ns->current_map = 0; 172 // initialisation done, kick it!
138 ns->current_x = 0;
139 ns->current_y = 0;
140 ns->client[0] = 0;
141 ns->buggy_mapscroll = 0;
142
143 ns->sent_scroll = 0;
144 ns->host = strdup_local (from_ip);
145 sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 173 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
146 sl.buf = (unsigned char *) buf; 174 flush ();
147 sl.len = strlen ((char *) buf);
148 Send_With_Handling (ns, &sl);
149#ifdef CS_LOGSTATS
150 if (socket_info.nconns > cst_tot.max_conn)
151 cst_tot.max_conn = socket_info.nconns;
152 if (socket_info.nconns > cst_lst.max_conn)
153 cst_lst.max_conn = socket_info.nconns;
154#endif
155}
156 175
176 reset_stats ();
157 177
158/** This sets up the socket and reads all the image information into memory. */ 178 clients.insert (this);
179}
180
181client::~client ()
182{
183 clients.erase (this);
184
185 mapinfo_queue_clear ();
186 free (stats.range);
187 free (stats.title);
188 free (host);
189}
190
159void 191void
160init_ericserver (void) 192client::do_destroy ()
161{ 193{
162 struct sockaddr_in insock; 194 attachable::do_destroy ();
163 struct protoent *protox;
164 struct linger linger_opt;
165 195
166 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); 196 if (pl)
197 pl->disconnect ();
167 198
168 socket_info.timeout.tv_sec = 0; 199 if (fd >= 0)
169 socket_info.timeout.tv_usec = 0;
170 socket_info.nconns = 0;
171
172#ifdef CS_LOGSTATS
173 memset (&cst_tot, 0, sizeof (CS_Stats));
174 memset (&cst_lst, 0, sizeof (CS_Stats));
175 cst_tot.time_start = time (NULL);
176 cst_lst.time_start = time (NULL);
177#endif
178
179 LOG (llevDebug, "Initialize new client/server data\n");
180 socket_info.nconns = 1;
181 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
182 init_sockets[0].faces_sent = NULL; /* unused */
183 socket_info.allocated_sockets = 1;
184
185 protox = getprotobyname ("tcp");
186 if (protox == NULL)
187 { 200 {
188 LOG (llevError, "init_ericserver: Error getting protox\n"); 201 send_packet ("goodbye");
189 return; 202 flush ();
203
204 close (fd);
190 } 205 }
191 206
192 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); 207 state = ST_DEAD;
193 if (init_sockets[0].fd == -1)
194 {
195 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
196 exit (-1);
197 }
198 208
199 insock.sin_family = AF_INET; 209 socket_ev.stop ();
200 insock.sin_port = htons (settings.csport);
201 insock.sin_addr.s_addr = htonl (INADDR_ANY);
202 210
203 linger_opt.l_onoff = 0; 211 refcnt_dec (); // socket no longer open
204 linger_opt.l_linger = 0;
205 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
206 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
207
208 {
209 int tmp = 1;
210
211 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
212 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
213 }
214
215 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
216 {
217 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
218 close (init_sockets[0].fd);
219 exit (-1);
220 }
221
222 if (listen (init_sockets[0].fd, 5) == (-1))
223 {
224 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
225 close (init_sockets[0].fd);
226 exit (-1);
227 }
228
229 init_sockets[0].status = Ns_Add;
230 read_client_images ();
231} 212}
232 213
233
234/*******************************************************************************
235 *
236 * Start of functions dealing with freeing of the data.
237 *
238 ******************************************************************************/
239
240/** Free's all the memory that ericserver allocates. */
241void 214void
242free_all_newserver (void) 215client::reset_stats ()
243{ 216{
244 LOG (llevDebug, "Freeing all new client/server information.\n"); 217 /* we need to clear these to -1 and not zero - otherwise,
245 free_socket_images (); 218 * if a player quits and starts a new character, we wont
246 free (init_sockets); 219 * send new values to the client, as things like exp start
247} 220 * at zero.
248
249/**
250 * Frees a socket.
251 * Basically, all we need to do here is free all data structures that
252 * might be associated with the socket. It is up to the caller to
253 * update the list
254 */ 221 */
222 for (int i = 0; i < NUM_SKILLS; i++)
223 last_skill_exp[i] = -1;
255 224
256void 225 for (int i = 0; i < NROFATTACKS; i++)
257free_newsocket (NewSocket *ns) 226 last_resist[i] = -1;
258{
259 close (ns->fd);
260 227
261 if (ns->stats.range) 228 last_weapon_sp = -1;
262 free (ns->stats.range); 229 last_level = -1;
230 last_stats.exp = -1;
231 last_weight = (uint32) - 1;
232 last_flags = 0;
233 last_weight = 0;
234 last_weight_limit = 0;
235 last_path_attuned = 0;
236 last_path_repelled = 0;
237 last_path_denied = 0;
238 last_speed = 0;
239 last_flags = 0;
263 240
264 if (ns->stats.title) 241 static living zero_living;
265 free (ns->stats.title); 242 last_stats = zero_living;
266
267 free (ns->host);
268 free (ns->inbuf.buf);
269} 243}
270 244
271/** Sends the 'goodbye' command to the player, and closes connection. */ 245client *
272void 246client::create (int fd, const char *peername)
273final_free_player (player *pl)
274{ 247{
275 cs_write_string (&pl->socket, "goodbye", 8); 248 client *ns = new client (dup (fd), peername);
276 free_newsocket (&pl->socket); 249 ns->instantiate (); // effectively a nop right now
277 free_player (pl); 250 INVOKE_CLIENT (CONNECT, ns);
251 return ns;
278} 252}
253

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