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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.17 by root, Fri Dec 15 03:53:44 2006 UTC vs.
Revision 1.47 by root, Sat May 12 22:04:20 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * CrossFire, A Multiplayer game for X-windows
3 3 *
4 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
4 Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team 5 * Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
5 Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (C) 1992 Frank Tore Johansen
6 7 *
7 This program is free software; you can redistribute it and/or modify 8 * This program 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 2 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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 21 *
21 The author can be reached via e-mail to <crossfire@schmorp.de> 22 * The author 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 34
35#define BG_SCRUB_RATE 4 // how often to send a face in the background
35 36
36#include <global.h> 37#include <global.h>
37#include <sproto.h> 38#include <sproto.h>
38#include <sockproto.h> 39#include <sockproto.h>
39 40
… …
45 46
46#include <unistd.h> 47#include <unistd.h>
47#include <arpa/inet.h> 48#include <arpa/inet.h>
48 49
49#include <loader.h> 50#include <loader.h>
50#include <newserver.h>
51 51
52/***************************************************************************** 52#define MAX_QUEUE_DEPTH 500 //TODO
53 * Start of command dispatch area. 53#define MAX_QUEUE_BACKLOG 3. //TODO
54 * The commands here are protocol commands.
55 ****************************************************************************/
56 54
57/* Either keep this near the start or end of the file so it is
58 * at least reasonablye easy to find.
59 * There are really 2 commands - those which are sent/received
60 * before player joins, and those happen after the player has joined.
61 * As such, we have function types that might be called, so
62 * we end up having 2 tables.
63 */
64
65enum {
66 PF_PLAYER = 0x01, // must have valid player
67 PF_IMMEDIATE = 0x02, // TODO: hack, can be executed immediately
68 PF_PLAYING = 0x04, // must be in playing state
69};
70
71struct pkt_type
72{
73 const char *name;
74 void *cb;
75 int flags;
76
77 bool may_execute (client_socket *ns)
78 {
79 return (!(flags & PF_PLAYER) || ns->pl)
80 && (!(flags & PF_PLAYING) || (ns->pl && ns->pl->state == ST_PLAYING));
81 }
82
83 void execute (client_socket *ns, char *data, int datalen)
84 {
85 //TODO: only one format
86 if (flags & PF_PLAYER)
87 ((void (*)(char *, int, player * ))cb)((char *)data, datalen, ns->pl);
88 else
89 ((void (*)(char *, int, client_socket *))cb)((char *)data, datalen, ns);
90 }
91};
92
93// SocketCommand, PlayingCommand, should not exist with those ugly casts
94#define SC(cb) (void *)static_cast<void (*)(char *, int, client_socket *)>(cb),
95#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
96
97/**
98 * Dispatch table for the server.
99 */
100static struct pkt_type packets[] = {
101 {"ncom", PC(NewPlayerCmd) PF_PLAYING },
102 {"command", PC(PlayerCmd) PF_PLAYING },
103
104 {"examine", PC(ExamineCmd) PF_PLAYING | PF_IMMEDIATE },
105 {"apply", PC(ApplyCmd) PF_PLAYING | PF_IMMEDIATE },
106 {"reply", PC(ReplyCmd) PF_IMMEDIATE },
107 {"lookat", PC(LookAt) PF_PLAYING | PF_IMMEDIATE },
108 {"lock", PC(LockItem) PF_PLAYING | PF_IMMEDIATE },
109 {"mark", PC(MarkItem) PF_PLAYING | PF_IMMEDIATE },
110 {"move", PC(MoveCmd) PF_PLAYING | PF_IMMEDIATE },
111 {"ext", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
112 {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */
113 {"mapinfo", PC(MapInfoCmd) PF_IMMEDIATE }, /* CF+ */
114
115 {"addme", SC(AddMeCmd) PF_IMMEDIATE },
116 {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */
117 {"requestinfo", SC(RequestInfo) 0 },
118 {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
119 {"setsound", SC(SetSound) PF_IMMEDIATE },
120 {"setup", SC(SetUp) PF_IMMEDIATE },
121 {"version", SC(VersionCmd) PF_IMMEDIATE },
122 {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */
123 {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */
124 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
125};
126
127/**
128 * RequestInfo is sort of a meta command. There is some specific
129 * request of information, but we call other functions to provide
130 * that information.
131 */
132void 55void
133RequestInfo (char *buf, int len, client_socket * ns) 56client::reset_state ()
134{ 57{
135 char *params = NULL, *cp; 58 if (!pl)
59 return;
136 60
137 /* No match */ 61 pl->run_on = 0;
138 char bigbuf[MAX_BUF]; 62 pl->fire_on = 0;
139 int slen; 63}
140 64
141 /* Set up replyinfo before we modify any of the buffers - this is used 65void
142 * if we don't find a match. 66client::queue_command (packet_type *handler, char *data, int datalen)
143 */ 67{
144 strcpy (bigbuf, "replyinfo "); 68 tstamp stamp = now ();
145 slen = strlen (bigbuf);
146 safe_strcat (bigbuf, buf, &slen, MAX_BUF);
147 69
148 /* find the first space, make it null, and update the 70 if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
149 * params pointer.
150 */
151 for (cp = buf; *cp != '\0'; cp++)
152 if (*cp == ' ')
153 { 71 {
154 *cp = '\0'; 72 //TODO: just disconnect here?
155 params = cp + 1; 73 reset_state ();
156 break; 74 send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
157 } 75 }
158
159 if (!strcmp (buf, "image_info"))
160 send_image_info (ns, params);
161 else if (!strcmp (buf, "image_sums"))
162 send_image_sums (ns, params);
163 else if (!strcmp (buf, "skill_info"))
164 send_skill_info (ns, params);
165 else if (!strcmp (buf, "spell_paths"))
166 send_spell_paths (ns, params);
167 else 76 else
168 ns->send_packet (bigbuf, len); 77 {
169} 78 cmd_queue.push_back (command ());
170 79 command &cmd = cmd_queue.back ();
171/** 80 cmd.stamp = stamp;
172 * Handle client input. 81 cmd.handler = handler;
173 * 82 cmd.data = salloc<char> (datalen + 1, data);
174 * HandleClient is actually not named really well - we only get here once 83 cmd.datalen = datalen;
175 * there is input, so we don't do exception or other stuff here.
176 * sock is the output socket information. pl is the player associated
177 * with this socket, null if no player (one of the init_sockets for just
178 * starting a connection)
179 */
180
181void
182HandleClient (client_socket *ns, player *pl)
183{
184 /* Loop through this - maybe we have several complete packets here. */
185 // limit to a few commands only, though, as to not monopolise the server
186 for (int repeat = 16; repeat--;)
187 { 84 }
188 /* If it is a player, and they don't have any speed left, we 85}
189 * return, and will read in the data when they do have time. 86
190 */ 87bool
88client::handle_command ()
89{
90 bool skipping = false;
91
92 while (!cmd_queue.empty ()
191 if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) 93 && !(state == ST_PLAYING && pl->ob && pl->ob->speed_left <= 0.f))
192 return; 94 {
95 command &cmd = cmd_queue.front ();
193 96
194 int pkt_len = ns->read_packet (); 97 if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
195
196 if (pkt_len < 0)
197 { 98 {
198 LOG (llevError, "read error on player %s\n", &pl->ob->name); 99 if (!skipping)
199 /* Caller will take care of cleaning this up */
200 ns->status = Ns_Dead;
201 return;
202 }
203 else if (pkt_len == 0)
204 /* Still dont have a full packet */
205 return;
206
207 /* First, break out beginning word. There are at least
208 * a few commands that do not have any paremeters. If
209 * we get such a command, don't worry about trying
210 * to break it up.
211 */
212 int datalen;
213 char *data = strchr ((char *)ns->inbuf + 2, ' ');
214
215 if (data)
216 { 100 {
217 *data++ = 0; 101 skipping = true;
218 datalen = pkt_len - (data - (char *)ns->inbuf); 102 reset_state ();
103 send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
104 }
105
106 cmd_queue.pop_front ();
219 } 107 }
220 else 108 else
221 { 109 {
222 data = (char *)ns->inbuf + 2; // better read garbage than segfault 110 execute (cmd.handler, cmd.data, cmd.datalen);
223 datalen = 0; 111 cmd_queue.pop_front ();
112 return true;
224 } 113 }
225
226 ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
227
228 for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
229 if (!strcmp ((char *)ns->inbuf + 2, pkt->name))
230 {
231 if (pkt->may_execute (ns))
232 {
233 pkt->execute (ns, data, datalen);
234 ns->skip_packet (pkt_len);
235 //D//TODO not doing this causes random memory corruption
236 if (pkt->flags & PF_IMMEDIATE)
237 goto next_packet;
238 return;
239 }
240 }
241
242 /* If we get here, we didn't find a valid command. Logging
243 * this might be questionable, because a broken client/malicious
244 * user could certainly send a whole bunch of invalid commands.
245 */
246 LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2);
247 ns->skip_packet (pkt_len);
248 next_packet:
249 ;
250 } 114 }
115
116 return false;
251} 117}
252 118
253void 119void
254flush_sockets (void) 120flush_sockets (void)
255{ 121{
256 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) 122 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
257 if ((*i)->status != Ns_Dead)
258 (*i)->flush (); 123 (*i)->flush ();
259} 124}
260 125
261/** 126/**
262 * This checks the sockets for input, does the right thing. 127 * This checks the sockets for input, does the right thing.
263 * 128 *
… …
266 * 131 *
267 */ 132 */
268void 133void
269doeric_server (void) 134doeric_server (void)
270{ 135{
271 int i, pollret;
272 fd_set tmp_read;
273 struct sockaddr_in addr;
274 socklen_t addrlen = sizeof (struct sockaddr);
275 player *pl, *next;
276 int maxfd = 0;
277
278#ifdef CS_LOGSTATS 136#ifdef CS_LOGSTATS
279 if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) 137 if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
280 write_cs_stats (); 138 write_cs_stats ();
281#endif 139#endif
282 140
283 /* Go through the players. Let the loop set the next pl value, 141 //TODO: should not be done here, either
284 * since we may remove some 142 for (unsigned i = 0; i < clients.size (); ++i)
143 {
144 client *ns = clients [i];
145
146 ns->tick ();
147 ns->refcnt_chk ();
148 }
149}
150
151void
152client::tick ()
153{
154 if (!pl || destroyed ())
155 return;
156
157 /* Update the players stats once per tick. More efficient than
158 * sending them whenever they change, and probably just as useful
285 */ 159 */
286 //TODO: must be handled cleanly elsewhere 160 esrv_update_stats (pl);
287 for (pl = first_player; pl; ) 161
162 if (last_weight != -1 && last_weight != WEIGHT (pl->ob))
163 {
164 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
165 if (last_weight != WEIGHT (pl->ob))
166 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
167 (unsigned long) last_weight, WEIGHT (pl->ob));
288 { 168 }
289 player *npl = pl->next;
290 169
291 //TODO: must be handled cleanly elsewhere 170 draw_client_map (pl->ob);
292 if (pl->socket->status == Ns_Dead) 171
172 if (update_look)
173 esrv_draw_look (pl->ob);
174
175 if (askface.empty () && !partial_face_ofs)
176 {
177 // regularly send a new face when queue is empty
178 if (bg_scrub && !--bg_scrub && enable_bg_scrub)
179 while (scrub_idx < faces.size () - 1)
180 {
181 ++scrub_idx;
182 if (!faces_sent [scrub_idx])
183 {
184 send_face (scrub_idx);
185 flush_fx ();
186
187 bg_scrub = 1; // send up to one face per tick, unless an image was requested
188 break;
189 }
190 }
191
192 rate_avail = max_rate - outputbuffer_len ();
193 }
194 else
195 {
196 int ol = outputbuffer_len ();
197
198 rate_avail = min (max_rate, rate_avail + max_rate);
199 rate_avail -= ol;
200
201 int avail = rate_avail;
202
203 // if we can split images, transfer up to mss packets if possible
204 // but never more 768 bytes more.
205 if (fxix) avail += min (768, mss - (ol % mss));
206
207 bg_scrub = BG_SCRUB_RATE;
208
209 while (avail > 0)
293 { 210 {
294 save_player (pl->ob, 0); 211 if (partial_face_ofs)
295
296 if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
297 { 212 {
298 terminate_all_pets (pl->ob); 213 if (facedata *d = face_data (partial_face, faceset))
299 pl->ob->remove (); 214 {
215 // 9 bytes is enough for fx_FFFOOO, 40 leaves some room
216 int chunk = min (min (avail - 40, MAXSOCKBUF - 9), partial_face_ofs);
217
218 if (chunk <= 0)
219 break;
220
221 partial_face_ofs -= chunk;
222
223 packet sl ("ix");
224
225 sl << ber32 (partial_face)
226 << ber32 (partial_face_ofs)
227 << data (d->data.data () + partial_face_ofs, chunk);
228
229 send_packet (sl);
230 }
231 else
232 partial_face_ofs = 0;
300 } 233 }
234 else if (!askface.empty ())
235 {
236 // use a lifo to send most recently requested images
237 faceidx facenum = askface.back ();
238 askface.pop_back ();
301 239
302 leave (pl, 1); 240 if (fxix)
303 final_free_player (pl); 241 {
242 if (facedata *d = face_data (facenum, faceset))
243 {
244 partial_face = facenum;
245 partial_face_ofs = d->data.size ();
246 }
247 }
248 else
249 send_image (facenum);
250 }
251 else
252 break;
253
254 int consumed = ol - outputbuffer_len ();
255 avail -= consumed;
256 rate_avail -= consumed;
304 } 257 }
305
306 pl = npl;
307 }
308
309 FD_ZERO (&tmp_read);
310
311 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); )
312 { 258 }
313 client_socket *s = *i;
314
315 if (s->status == Ns_Dead)
316 {
317 client_sockets.erase (i);
318 delete s;
319 }
320 else
321 {
322 if (s->fd > maxfd) maxfd = s->fd;
323
324 FD_SET (s->fd, &tmp_read);
325
326 ++i;
327 }
328 }
329
330 struct timeval timeout;
331
332 timeout.tv_sec = 0;
333 timeout.tv_usec = 0;
334
335 pollret = select (maxfd + 1,
336 &tmp_read, 0, 0,
337 &timeout);
338
339 if (pollret == -1)
340 {
341 LOG (llevError, "select failed: %s\n", strerror (errno));
342 return;
343 }
344
345 /* We need to do some of the processing below regardless */
346
347 /* Check for any input on the sockets */
348 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i)
349 {
350 client_socket *s = *i;
351 player *pl = s->pl;
352
353 //TODO: disassociate handleclient from socket readin
354 if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read))
355 HandleClient (s, pl);
356
357 //TODO: should not be done here, either
358 if (s->status != Ns_Dead && pl)
359 {
360 /* Update the players stats once per tick. More efficient than
361 * sending them whenever they change, and probably just as useful
362 */
363 esrv_update_stats (pl);
364 if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
365 {
366 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
367 if (pl->last_weight != WEIGHT (pl->ob))
368 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
369 (unsigned long) pl->last_weight, WEIGHT (pl->ob));
370 }
371
372 /* draw_client_map does sanity checking that map is
373 * valid, so don't do it here.
374 */
375 draw_client_map (pl->ob);
376 if (s->update_look)
377 esrv_draw_look (pl->ob);
378 }
379 }
380} 259}
381 260

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