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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.18 by root, Fri Dec 15 04:21:29 2006 UTC vs.
Revision 1.41 by root, Wed Mar 14 15:44:47 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 35
36#include <global.h> 36#include <global.h>
37#include <sproto.h> 37#include <sproto.h>
… …
45 45
46#include <unistd.h> 46#include <unistd.h>
47#include <arpa/inet.h> 47#include <arpa/inet.h>
48 48
49#include <loader.h> 49#include <loader.h>
50#include <newserver.h>
51 50
52/***************************************************************************** 51#define MAX_QUEUE_DEPTH 500 //TODO
53 * Start of command dispatch area. 52#define MAX_QUEUE_BACKLOG 3. //TODO
54 * The commands here are protocol commands.
55 ****************************************************************************/
56
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 * Handle client input.
129 *
130 * HandleClient is actually not named really well - we only get here once
131 * there is input, so we don't do exception or other stuff here.
132 * sock is the output socket information. pl is the player associated
133 * with this socket, null if no player (one of the init_sockets for just
134 * starting a connection)
135 */
136 53
137void 54void
138HandleClient (client_socket *ns, player *pl) 55client::reset_state ()
139{ 56{
140 /* Loop through this - maybe we have several complete packets here. */ 57 if (!pl)
141 // limit to a few commands only, though, as to not monopolise the server 58 return;
142 for (int repeat = 16; repeat--;) 59
60 pl->run_on = 0;
61 pl->fire_on = 0;
62}
63
64void
65client::queue_command (packet_type *handler, char *data, int datalen)
66{
67 tstamp stamp = now ();
68
69 if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
143 { 70 {
144 /* If it is a player, and they don't have any speed left, we 71 //TODO: just disconnect here?
145 * return, and will read in the data when they do have time. 72 reset_state ();
146 */ 73 send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
147 if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) 74 }
148 return; 75 else
76 {
77 cmd_queue.push_back (command ());
78 command &cmd = cmd_queue.back ();
79 cmd.stamp = stamp;
80 cmd.handler = handler;
81 cmd.data = salloc<char> (datalen + 1, data);
82 cmd.datalen = datalen;
83 }
84}
149 85
150 int pkt_len = ns->read_packet (); 86bool
87client::handle_command ()
88{
89 bool skipping = false;
151 90
152 if (pkt_len < 0) 91 while (!cmd_queue.empty ()
92 && !(state == ST_PLAYING && pl->ob && pl->ob->speed_left <= 0))
93 {
94 command &cmd = cmd_queue.front ();
95
96 if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
153 { 97 {
154 LOG (llevError, "read error on player %s\n", &pl->ob->name); 98 if (!skipping)
155 /* Caller will take care of cleaning this up */ 99 {
156 ns->status = Ns_Dead; 100 skipping = true;
157 return; 101 reset_state ();
102 send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
158 } 103 }
159 else if (pkt_len == 0)
160 /* Still dont have a full packet */
161 return;
162 104
163 /* First, break out beginning word. There are at least 105 cmd_queue.pop_front ();
164 * a few commands that do not have any paremeters. If
165 * we get such a command, don't worry about trying
166 * to break it up.
167 */
168 int datalen;
169 char *data = strchr ((char *)ns->inbuf + 2, ' ');
170
171 if (data)
172 {
173 *data++ = 0;
174 datalen = pkt_len - (data - (char *)ns->inbuf);
175 } 106 }
176 else 107 else
177 { 108 {
178 data = (char *)ns->inbuf + 2; // better read garbage than segfault 109 execute (cmd.handler, cmd.data, cmd.datalen);
179 datalen = 0; 110 cmd_queue.pop_front ();
111 return true;
180 } 112 }
113 }
181 114
182 ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 115 return false;
183
184 for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
185 if (!strcmp ((char *)ns->inbuf + 2, pkt->name))
186 {
187 if (pkt->may_execute (ns))
188 {
189 pkt->execute (ns, data, datalen);
190 ns->skip_packet (pkt_len);
191 //D//TODO not doing this causes random memory corruption
192 if (pkt->flags & PF_IMMEDIATE)
193 goto next_packet;
194 return;
195 }
196 }
197
198 /* If we get here, we didn't find a valid command. Logging
199 * this might be questionable, because a broken client/malicious
200 * user could certainly send a whole bunch of invalid commands.
201 */
202 LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2);
203 ns->skip_packet (pkt_len);
204 next_packet:
205 ;
206 }
207} 116}
208 117
209void 118void
210flush_sockets (void) 119flush_sockets (void)
211{ 120{
212 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) 121 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
213 if ((*i)->status != Ns_Dead)
214 (*i)->flush (); 122 (*i)->flush ();
215} 123}
216 124
217/** 125/**
218 * This checks the sockets for input, does the right thing. 126 * This checks the sockets for input, does the right thing.
219 * 127 *
… …
222 * 130 *
223 */ 131 */
224void 132void
225doeric_server (void) 133doeric_server (void)
226{ 134{
227 int i, pollret;
228 fd_set tmp_read;
229 struct sockaddr_in addr;
230 socklen_t addrlen = sizeof (struct sockaddr);
231 player *pl, *next;
232 int maxfd = 0;
233
234#ifdef CS_LOGSTATS 135#ifdef CS_LOGSTATS
235 if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) 136 if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
236 write_cs_stats (); 137 write_cs_stats ();
237#endif 138#endif
238 139
239 /* Go through the players. Let the loop set the next pl value, 140 //TODO: should not be done here, either
240 * since we may remove some 141 for (unsigned i = 0; i < clients.size (); ++i)
241 */
242 //TODO: must be handled cleanly elsewhere
243 for (pl = first_player; pl; )
244 { 142 {
245 player *npl = pl->next; 143 client *s = clients [i];
246
247 //TODO: must be handled cleanly elsewhere
248 if (pl->socket->status == Ns_Dead)
249 {
250 save_player (pl->ob, 0);
251
252 if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
253 {
254 terminate_all_pets (pl->ob);
255 pl->ob->remove ();
256 }
257
258 leave (pl, 1);
259 final_free_player (pl);
260 }
261
262 pl = npl;
263 }
264
265 FD_ZERO (&tmp_read);
266
267 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); )
268 {
269 client_socket *s = *i;
270
271 if (s->status == Ns_Dead)
272 {
273 client_sockets.erase (i);
274 delete s;
275 }
276 else
277 {
278 if (s->fd > maxfd) maxfd = s->fd;
279
280 FD_SET (s->fd, &tmp_read);
281
282 ++i;
283 }
284 }
285
286 struct timeval timeout;
287
288 timeout.tv_sec = 0;
289 timeout.tv_usec = 0;
290
291 pollret = select (maxfd + 1,
292 &tmp_read, 0, 0,
293 &timeout);
294
295 if (pollret == -1)
296 {
297 LOG (llevError, "select failed: %s\n", strerror (errno));
298 return;
299 }
300
301 /* We need to do some of the processing below regardless */
302
303 /* Check for any input on the sockets */
304 for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i)
305 {
306 client_socket *s = *i;
307 player *pl = s->pl; 144 player *pl = s->pl;
308 145
309 //TODO: disassociate handleclient from socket readin 146 if (pl && pl->ns && !pl->ns->destroyed ())
310 if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read)) 147 {
311 HandleClient (s, pl); 148 client *ns = pl->ns;
312 149
313 //TODO: should not be done here, either
314 if (s->status != Ns_Dead && pl)
315 {
316 /* Update the players stats once per tick. More efficient than 150 /* Update the players stats once per tick. More efficient than
317 * sending them whenever they change, and probably just as useful 151 * sending them whenever they change, and probably just as useful
318 */ 152 */
319 esrv_update_stats (pl); 153 esrv_update_stats (pl);
154
320 if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) 155 if (ns->last_weight != -1 && ns->last_weight != WEIGHT (pl->ob))
321 { 156 {
322 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); 157 esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
323 if (pl->last_weight != WEIGHT (pl->ob)) 158 if (ns->last_weight != WEIGHT (pl->ob))
324 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", 159 LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
325 (unsigned long) pl->last_weight, WEIGHT (pl->ob)); 160 (unsigned long) ns->last_weight, WEIGHT (pl->ob));
326 } 161 }
327 162
328 /* draw_client_map does sanity checking that map is
329 * valid, so don't do it here.
330 */
331 draw_client_map (pl->ob); 163 draw_client_map (pl->ob);
164
332 if (s->update_look) 165 if (s->update_look)
333 esrv_draw_look (pl->ob); 166 esrv_draw_look (pl->ob);
167
168 while (!ns->askface.empty () && ns->outputbuffer_len () < ns->max_rate)
169 {
170 // use a lifo to send most recently requested images
171 faceidx face = ns->askface.back ();
172 ns->askface.pop_back ();
173
174 ns->send_image (face);
175 }
334 } 176 }
177
178 s->refcnt_chk ();
335 } 179 }
336} 180}
337 181

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