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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.19 by root, Fri Dec 15 19:59:20 2006 UTC vs.
Revision 1.51 by root, Sat Jun 9 22:54:04 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) 2002-2003 Mark Wedel & The Crossfire Development Team 5 * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team
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 * Main client/server loops. 27 * Main client/server loops.
27 * 28 *
28 * \date 2003-12-02 29 * \date 2003-12-02
29 * 30 *
30 * loop.c mainly deals with initialization and higher level socket 31 * loop.c mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 32 * maintanance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c
33 */ 33 */
34
35 34
36#include <global.h> 35#include <global.h>
37#include <sproto.h> 36#include <sproto.h>
38#include <sockproto.h> 37#include <sockproto.h>
39 38
46#include <unistd.h> 45#include <unistd.h>
47#include <arpa/inet.h> 46#include <arpa/inet.h>
48 47
49#include <loader.h> 48#include <loader.h>
50 49
51/***************************************************************************** 50#define BG_SCRUB_RATE 4 // how often to send a face in the background
52 * Start of command dispatch area.
53 * The commands here are protocol commands.
54 ****************************************************************************/
55 51
56/* Either keep this near the start or end of the file so it is 52#define MAX_QUEUE_DEPTH 500
57 * at least reasonablye easy to find. 53#define MAX_QUEUE_BACKLOG 3.
58 * There are really 2 commands - those which are sent/received
59 * before player joins, and those happen after the player has joined.
60 * As such, we have function types that might be called, so
61 * we end up having 2 tables.
62 */
63 54
64enum { 55void
65 PF_PLAYER = 0x01, // must have valid player 56client::reset_state ()
66 PF_IMMEDIATE = 0x02, // TODO: hack, can be executed immediately
67 PF_PLAYING = 0x04, // must be in playing state
68};
69
70struct pkt_type
71{ 57{
72 const char *name; 58 if (!pl)
73 void *cb; 59 return;
74 int flags;
75 60
76 bool may_execute (client *ns) 61 pl->run_on = 0;
62 pl->fire_on = 0;
63}
64
65void
66client::queue_command (packet_type *handler, char *data, int datalen)
67{
68 tstamp stamp = NOW;
69
70 if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
77 { 71 {
78 return (!(flags & PF_PLAYER) || ns->pl) 72 //TODO: just disconnect here?
79 && (!(flags & PF_PLAYING) || (ns->pl && ns->pl->state == ST_PLAYING)); 73 reset_state ();
74 send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
80 } 75 }
81
82 void execute (client *ns, char *data, int datalen)
83 {
84 //TODO: only one format
85 if (flags & PF_PLAYER)
86 ((void (*)(char *, int, player * ))cb)((char *)data, datalen, ns->pl);
87 else 76 else
88 ((void (*)(char *, int, client *))cb)((char *)data, datalen, ns); 77 {
89 } 78 cmd_queue.push_back (command ());
90}; 79 command &cmd = cmd_queue.back ();
91 80 cmd.stamp = stamp;
92// SocketCommand, PlayingCommand, should not exist with those ugly casts 81 cmd.handler = handler;
93#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 82 cmd.data = salloc<char> (datalen + 1, data);
94#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | 83 cmd.datalen = datalen;
95
96/**
97 * Dispatch table for the server.
98 */
99static struct pkt_type packets[] = {
100 {"ncom", PC(NewPlayerCmd) PF_PLAYING },
101 {"command", PC(PlayerCmd) PF_PLAYING },
102
103 {"examine", PC(ExamineCmd) PF_PLAYING | PF_IMMEDIATE },
104 {"apply", PC(ApplyCmd) PF_PLAYING | PF_IMMEDIATE },
105 {"reply", PC(ReplyCmd) PF_IMMEDIATE },
106 {"lookat", PC(LookAt) PF_PLAYING | PF_IMMEDIATE },
107 {"lock", PC(LockItem) PF_PLAYING | PF_IMMEDIATE },
108 {"mark", PC(MarkItem) PF_PLAYING | PF_IMMEDIATE },
109 {"move", PC(MoveCmd) PF_PLAYING | PF_IMMEDIATE },
110 {"ext", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
111 {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */
112 {"mapinfo", PC(MapInfoCmd) PF_IMMEDIATE }, /* CF+ */
113
114 {"addme", SC(AddMeCmd) PF_IMMEDIATE },
115 {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */
116 {"requestinfo", SC(RequestInfo) 0 },
117 {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
118 {"setsound", SC(SetSound) PF_IMMEDIATE },
119 {"setup", SC(SetUp) PF_IMMEDIATE },
120 {"version", SC(VersionCmd) PF_IMMEDIATE },
121 {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */
122 {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */
123 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
124};
125
126/**
127 * Handle client input.
128 *
129 * HandleClient is actually not named really well - we only get here once
130 * there is input, so we don't do exception or other stuff here.
131 * sock is the output socket information. pl is the player associated
132 * with this socket, null if no player (one of the init_sockets for just
133 * starting a connection)
134 */
135void
136HandleClient (client *ns, player *pl)
137{
138 /* Loop through this - maybe we have several complete packets here. */
139 // limit to a few commands only, though, as to not monopolise the server
140 for (int repeat = 16; repeat--;)
141 { 84 }
142 /* If it is a player, and they don't have any speed left, we 85}
143 * return, and will read in the data when they do have time.
144 */
145 if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)
146 return;
147 86
148 int pkt_len = ns->read_packet (); 87bool
88client::handle_command ()
89{
90 if (!cmd_queue.empty ()
91 && state == ST_PLAYING
92 && pl->ob->speed_left > 0.f)
93 {
94 command &cmd = cmd_queue.front ();
149 95
150 if (pkt_len < 0) 96 if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW)
151 { 97 {
152 LOG (llevError, "read error on player %s\n", &pl->ob->name); 98 reset_state ();
153 /* Caller will take care of cleaning this up */ 99 send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
154 ns->status = Ns_Dead;
155 return;
156 }
157 else if (pkt_len == 0)
158 /* Still dont have a full packet */
159 return;
160
161 /* First, break out beginning word. There are at least
162 * a few commands that do not have any paremeters. If
163 * we get such a command, don't worry about trying
164 * to break it up.
165 */
166 int datalen;
167 char *data = strchr ((char *)ns->inbuf + 2, ' ');
168
169 if (data)
170 {
171 *data++ = 0;
172 datalen = pkt_len - (data - (char *)ns->inbuf);
173 } 100 }
174 else 101 else
175 { 102 execute (cmd.handler, cmd.data, cmd.datalen);
176 data = (char *)ns->inbuf + 2; // better read garbage than segfault
177 datalen = 0;
178 }
179 103
180 ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 104 cmd_queue.pop_front ();
181 105 return true;
182 for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
183 if (!strcmp ((char *)ns->inbuf + 2, pkt->name))
184 {
185 if (pkt->may_execute (ns))
186 {
187 pkt->execute (ns, data, datalen);
188 ns->skip_packet (pkt_len);
189 //D//TODO not doing this causes random memory corruption
190 if (pkt->flags & PF_IMMEDIATE)
191 goto next_packet;
192 return;
193 }
194 }
195
196 /* If we get here, we didn't find a valid command. Logging
197 * this might be questionable, because a broken client/malicious
198 * user could certainly send a whole bunch of invalid commands.
199 */
200 LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2);
201 ns->skip_packet (pkt_len);
202 next_packet:
203 ;
204 } 106 }
107 else
108 return false;
205} 109}
206 110
207void 111void
208flush_sockets (void) 112flush_sockets (void)
209{ 113{
210 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) 114 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
211 if ((*i)->status != Ns_Dead)
212 (*i)->flush (); 115 (*i)->flush ();
213} 116}
214 117
215/** 118/**
216 * This checks the sockets for input, does the right thing. 119 * This checks the sockets for input, does the right thing.
217 * 120 *
220 * 123 *
221 */ 124 */
222void 125void
223doeric_server (void) 126doeric_server (void)
224{ 127{
225 int i, pollret; 128 //TODO: should not be done here, either
226 fd_set tmp_read; 129 for (unsigned i = 0; i < clients.size (); ++i)
227 struct sockaddr_in addr; 130 {
228 socklen_t addrlen = sizeof (struct sockaddr); 131 client *ns = clients [i];
229 player *pl, *next;
230 int maxfd = 0;
231 132
232#ifdef CS_LOGSTATS 133 ns->tick ();
233 if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) 134 ns->refcnt_chk ();
234 write_cs_stats (); 135 }
235#endif 136}
236 137
237 /* Go through the players. Let the loop set the next pl value, 138void
238 * since we may remove some 139client::tick ()
140{
141 if (!pl || destroyed ())
142 return;
143
144 /* Update the players stats once per tick. More efficient than
145 * sending them whenever they change, and probably just as useful
239 */ 146 */
240 //TODO: must be handled cleanly elsewhere 147 esrv_update_stats (pl);
241 for (pl = first_player; pl; ) 148
149 if (last_weight != -1 && last_weight != WEIGHT (pl->ob))
150 {
151 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
152 if (last_weight != WEIGHT (pl->ob))
153 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
154 (unsigned long) last_weight, WEIGHT (pl->ob));
242 { 155 }
243 player *npl = pl->next;
244 156
245 //TODO: must be handled cleanly elsewhere 157 draw_client_map (pl);
246 if (pl->socket->status == Ns_Dead) 158
159 if (update_look)
160 esrv_draw_look (pl);
161
162 if (askface.empty () && !partial_face_ofs)
163 {
164 // regularly send a new face when queue is empty
165 if (bg_scrub && !--bg_scrub && enable_bg_scrub)
166 while (scrub_idx < faces.size () - 1)
167 {
168 ++scrub_idx;
169 if (!faces_sent [scrub_idx])
170 {
171 send_face (scrub_idx);
172 flush_fx ();
173
174 bg_scrub = 1; // send up to one face per tick, unless an image was requested
175 break;
176 }
177 }
178
179 rate_avail = max_rate - outputbuffer_len ();
180 }
181 else
182 {
183 int ol = outputbuffer_len ();
184
185 rate_avail = min (max_rate, rate_avail + max_rate);
186 rate_avail -= ol;
187
188 int avail = rate_avail;
189
190 // if we can split images, transfer up to mss packets if possible
191 // but never more 768 bytes more.
192 if (fxix) avail += min (768, mss - (ol % mss));
193
194 bg_scrub = BG_SCRUB_RATE;
195
196 while (avail > 0)
247 { 197 {
248 save_player (pl->ob, 0); 198 if (partial_face_ofs)
249
250 if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
251 { 199 {
252 terminate_all_pets (pl->ob); 200 if (facedata *d = face_data (partial_face, faceset))
253 pl->ob->remove (); 201 {
202 // 9 bytes is enough for fx_FFFOOO, 40 leaves some room
203 int chunk = min (min (avail - 40, MAXSOCKBUF - 9), partial_face_ofs);
204
205 if (chunk <= 0)
206 break;
207
208 partial_face_ofs -= chunk;
209
210 packet sl ("ix");
211
212 sl << ber32 (partial_face)
213 << ber32 (partial_face_ofs)
214 << data (d->data.data () + partial_face_ofs, chunk);
215
216 send_packet (sl);
217 }
218 else
219 partial_face_ofs = 0;
254 } 220 }
221 else if (!askface.empty ())
222 {
223 // use a lifo to send most recently requested images
224 faceidx facenum = askface.back ();
225 askface.pop_back ();
255 226
256 leave (pl, 1); 227 if (fxix)
257 final_free_player (pl); 228 {
229 if (facedata *d = face_data (facenum, faceset))
230 {
231 partial_face = facenum;
232 partial_face_ofs = d->data.size ();
233 }
234 }
235 else
236 send_image (facenum);
237 }
238 else
239 break;
240
241 int consumed = ol - outputbuffer_len ();
242 avail -= consumed;
243 rate_avail -= consumed;
258 } 244 }
259
260 pl = npl;
261 }
262
263 FD_ZERO (&tmp_read);
264
265 for (sockvec::iterator i = clients.begin (); i != clients.end (); )
266 { 245 }
267 client *s = *i;
268
269 if (s->status == Ns_Dead)
270 {
271 clients.erase (i);
272 delete s;
273 }
274 else
275 {
276 if (s->fd > maxfd) maxfd = s->fd;
277
278 FD_SET (s->fd, &tmp_read);
279
280 ++i;
281 }
282 }
283
284 struct timeval timeout;
285
286 timeout.tv_sec = 0;
287 timeout.tv_usec = 0;
288
289 pollret = select (maxfd + 1,
290 &tmp_read, 0, 0,
291 &timeout);
292
293 if (pollret == -1)
294 {
295 LOG (llevError, "select failed: %s\n", strerror (errno));
296 return;
297 }
298
299 /* We need to do some of the processing below regardless */
300
301 /* Check for any input on the sockets */
302 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
303 {
304 client *s = *i;
305 player *pl = s->pl;
306
307 //TODO: disassociate handleclient from socket readin
308 if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read))
309 HandleClient (s, pl);
310
311 //TODO: should not be done here, either
312 if (s->status != Ns_Dead && pl)
313 {
314 /* Update the players stats once per tick. More efficient than
315 * sending them whenever they change, and probably just as useful
316 */
317 esrv_update_stats (pl);
318 if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
319 {
320 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
321 if (pl->last_weight != WEIGHT (pl->ob))
322 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
323 (unsigned long) pl->last_weight, WEIGHT (pl->ob));
324 }
325
326 /* draw_client_map does sanity checking that map is
327 * valid, so don't do it here.
328 */
329 draw_client_map (pl->ob);
330 if (s->update_look)
331 esrv_draw_look (pl->ob);
332 }
333 }
334} 246}
335 247

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