| 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 (C) 2002-2003 Mark Wedel & The Crossfire Development Team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 | Copyright (C) 1992 Frank Tore Johansen |
5 | * |
| 6 | |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
| 7 | 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 |
7 | * the terms of the Affero GNU General Public License as published by the |
| 9 | the Free Software Foundation; either version 2 of the License, or |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
| 10 | (at your option) any later version. |
9 | * option) any later version. |
| 11 | |
10 | * |
| 12 | This program is distributed in the hope that it will be useful, |
11 | * This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
| 16 | |
15 | * |
| 17 | You should have received a copy of the GNU General Public License |
16 | * You should have received a copy of the Affero GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
17 | * and the GNU General Public License along with this program. If not, see |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
18 | * <http://www.gnu.org/licenses/>. |
| 20 | |
19 | * |
| 21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
| 22 | */ |
21 | */ |
| 23 | |
22 | |
| 24 | /** |
23 | /** |
| 25 | * \file |
24 | * \file |
| 26 | * Main client/server loops. |
25 | * Main client/server loops. |
| 27 | * |
26 | * |
| 28 | * \date 2003-12-02 |
27 | * \date 2003-12-02 |
| 29 | * |
28 | * |
| 30 | * loop.c mainly deals with initialization and higher level socket |
29 | * loop.c mainly deals with initialization and higher level socket |
| 31 | * maintenance (checking for lost connections and if data has arrived.) |
30 | * maintanance (checking for lost connections and if data has arrived.) |
| 32 | * The reading of data is handled in ericserver.c |
|
|
| 33 | */ |
31 | */ |
| 34 | |
|
|
| 35 | |
32 | |
| 36 | #include <global.h> |
33 | #include <global.h> |
| 37 | #include <sproto.h> |
34 | #include <sproto.h> |
| 38 | #include <sockproto.h> |
35 | #include <sockproto.h> |
| 39 | |
36 | |
| … | |
… | |
| 44 | #include <netdb.h> |
41 | #include <netdb.h> |
| 45 | |
42 | |
| 46 | #include <unistd.h> |
43 | #include <unistd.h> |
| 47 | #include <arpa/inet.h> |
44 | #include <arpa/inet.h> |
| 48 | |
45 | |
| 49 | #include <loader.h> |
46 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
| 50 | |
47 | |
| 51 | #define MAX_QUEUE_DEPTH 500 //TODO |
48 | #define MAX_QUEUE_DEPTH 50 |
| 52 | #define MAX_QUEUE_BACKLOG 2 //TODO |
49 | #define MAX_QUEUE_BACKLOG 3. |
| 53 | |
50 | |
| 54 | void |
51 | void |
| 55 | client::reset_state () |
52 | client::reset_state () |
| 56 | { |
53 | { |
| 57 | if (!pl) |
54 | if (!pl) |
| … | |
… | |
| 62 | } |
59 | } |
| 63 | |
60 | |
| 64 | void |
61 | void |
| 65 | client::queue_command (packet_type *handler, char *data, int datalen) |
62 | client::queue_command (packet_type *handler, char *data, int datalen) |
| 66 | { |
63 | { |
| 67 | tstamp stamp = now (); |
64 | tstamp stamp = NOW; |
| 68 | |
65 | |
| 69 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
66 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
| 70 | { |
67 | { |
| 71 | //TODO: just disconnect here? |
|
|
| 72 | reset_state (); |
68 | reset_state (); |
| 73 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
69 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
| 74 | } |
70 | } |
| 75 | else if (!cmd_queue.empty () && cmd_queue.front ().stamp + MAX_QUEUE_BACKLOG < stamp) |
|
|
| 76 | { |
|
|
| 77 | reset_state (); |
|
|
| 78 | send_packet_printf ("drawinfo %d too many commands in queue, ignoring.", NDI_RED); |
|
|
| 79 | } |
|
|
| 80 | else |
71 | else |
| 81 | cmd_queue.push_back (command ( |
72 | { |
| 82 | stamp, handler, (char *)salloc (datalen + 1, data), datalen |
73 | cmd_queue.resize (cmd_queue.size () + 1); |
| 83 | )); |
74 | command &cmd = cmd_queue.back (); |
|
|
75 | cmd.stamp = stamp; |
|
|
76 | cmd.handler = handler; |
|
|
77 | cmd.data = salloc<char> (datalen + 1, data); |
|
|
78 | cmd.datalen = datalen; |
|
|
79 | } |
| 84 | } |
80 | } |
| 85 | |
81 | |
| 86 | bool |
82 | bool |
| 87 | client::handle_command () |
83 | client::handle_command () |
| 88 | { |
84 | { |
| 89 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
|
|
| 90 | return false; |
|
|
| 91 | |
|
|
| 92 | if (cmd_queue.empty ()) |
85 | if (!cmd_queue.empty () |
| 93 | return false; |
86 | && state == ST_PLAYING |
| 94 | |
87 | && pl->ob->speed_left > 0.f) |
|
|
88 | { |
| 95 | command &cmd = cmd_queue.front (); |
89 | command &cmd = cmd_queue.front (); |
| 96 | |
90 | |
| 97 | if (cmd.stamp + MAX_QUEUE_BACKLOG < now ()) |
91 | if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
| 98 | { |
|
|
| 99 | reset_state (); |
|
|
| 100 | send_packet_printf ("drawinfo %d ignoring delayed command.", NDI_RED); |
|
|
| 101 | } |
|
|
| 102 | else |
|
|
| 103 | execute (cmd.handler, cmd.data, cmd.datalen); |
|
|
| 104 | |
|
|
| 105 | sfree (cmd.data, cmd.datalen); |
|
|
| 106 | cmd_queue.pop_front (); |
|
|
| 107 | |
|
|
| 108 | return true; |
|
|
| 109 | } |
|
|
| 110 | |
|
|
| 111 | void |
|
|
| 112 | flush_sockets (void) |
|
|
| 113 | { |
|
|
| 114 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
|
|
| 115 | if ((*i)->status != Ns_Dead) |
|
|
| 116 | (*i)->flush (); |
|
|
| 117 | } |
|
|
| 118 | |
|
|
| 119 | /** |
|
|
| 120 | * This checks the sockets for input, does the right thing. |
|
|
| 121 | * |
|
|
| 122 | * A bit of this code is grabbed out of socket.c |
|
|
| 123 | * There are 2 lists we need to look through - init_sockets is a list |
|
|
| 124 | * |
|
|
| 125 | */ |
|
|
| 126 | void |
|
|
| 127 | doeric_server (void) |
|
|
| 128 | { |
|
|
| 129 | #ifdef CS_LOGSTATS |
|
|
| 130 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
|
|
| 131 | write_cs_stats (); |
|
|
| 132 | #endif |
|
|
| 133 | |
|
|
| 134 | /* Go through the players. Let the loop set the next pl value, |
|
|
| 135 | * since we may remove some |
|
|
| 136 | */ |
|
|
| 137 | //TODO: must be handled cleanly elsewhere |
|
|
| 138 | for (player *pl = first_player; pl; ) |
|
|
| 139 | { |
|
|
| 140 | player *npl = pl->next; |
|
|
| 141 | |
|
|
| 142 | //TODO: must be handled cleanly elsewhere |
|
|
| 143 | if (!pl->socket || pl->socket->status == Ns_Dead) |
|
|
| 144 | { |
92 | { |
| 145 | save_player (pl->ob, 0); |
93 | reset_state (); // the command might actually reset some movement state etc. |
| 146 | |
94 | |
| 147 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
95 | if (pl) |
|
|
96 | pl->failmsg ( |
|
|
97 | "Cannot keep up with your commands, ignoring them! " |
|
|
98 | "H<Your character cannot keep up with the instructions you give G<him|her>. " |
|
|
99 | "Try issuing commands slower, or, if G<he|she> is incapacitated (paralyzed and so on), " |
|
|
100 | "wait till your character can act again.\n\nIf G<he|she> is permanently stuck, then " |
|
|
101 | "try the B<suicide> command (or use B<chat> to ask somebody to B<invite> you out).>" |
| 148 | { |
102 | ); |
| 149 | terminate_all_pets (pl->ob); |
|
|
| 150 | pl->ob->remove (); |
|
|
| 151 | } |
|
|
| 152 | |
|
|
| 153 | leave (pl, 1); |
|
|
| 154 | final_free_player (pl); |
|
|
| 155 | } |
|
|
| 156 | |
|
|
| 157 | pl = npl; |
|
|
| 158 | } |
|
|
| 159 | |
|
|
| 160 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ) |
|
|
| 161 | { |
|
|
| 162 | client *s = *i; |
|
|
| 163 | |
|
|
| 164 | if (s->status == Ns_Dead) |
|
|
| 165 | { |
|
|
| 166 | clients.erase (i); |
|
|
| 167 | delete s; |
|
|
| 168 | } |
103 | } |
| 169 | else |
104 | else |
| 170 | ++i; |
105 | execute (cmd.handler, cmd.data, cmd.datalen); |
|
|
106 | |
|
|
107 | sfree<char> (cmd.data, cmd.datalen + 1); |
|
|
108 | cmd_queue.pop_front (); |
|
|
109 | return true; |
|
|
110 | } |
|
|
111 | else |
|
|
112 | return false; |
|
|
113 | } |
|
|
114 | |
|
|
115 | void |
|
|
116 | client::tick () |
|
|
117 | { |
|
|
118 | if (!pl || destroyed ()) |
|
|
119 | return; |
|
|
120 | |
|
|
121 | pl->dirty = true; |
|
|
122 | |
|
|
123 | /* Update the players stats once per tick. More efficient than |
|
|
124 | * sending them whenever they change, and probably just as useful |
|
|
125 | */ |
|
|
126 | pl->need_updated_stats (); |
|
|
127 | esrv_update_stats (pl); |
|
|
128 | |
|
|
129 | if (pl->ns->update_spells) |
|
|
130 | esrv_update_spells (pl); |
|
|
131 | |
|
|
132 | sint32 weight = pl->ob->client_weight (); |
|
|
133 | |
|
|
134 | if (last_weight != weight) |
| 171 | } |
135 | { |
|
|
136 | pl->ob->update_stats (); |
|
|
137 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
|
138 | } |
| 172 | |
139 | |
| 173 | /* We need to do some of the processing below regardless */ |
140 | draw_client_map (pl); |
| 174 | |
141 | |
| 175 | /* Check for any input on the sockets */ |
142 | if (update_look) |
|
|
143 | esrv_draw_look (pl); |
|
|
144 | |
|
|
145 | mapinfo_queue_run (); |
|
|
146 | |
|
|
147 | #if HAVE_TCP_INFO |
|
|
148 | // check time of last ack, and, if too old, kill connection |
|
|
149 | socklen_t len = sizeof (tcpi); |
|
|
150 | |
|
|
151 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
|
|
152 | { |
|
|
153 | if (tcpi.tcpi_snd_mss) |
|
|
154 | mss = tcpi.tcpi_snd_mss; |
|
|
155 | |
|
|
156 | #if 0 |
|
|
157 | fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n", |
|
|
158 | tcpi.tcpi_unacked, |
|
|
159 | tcpi.tcpi_sacked, |
|
|
160 | tcpi.tcpi_lost, |
|
|
161 | tcpi.tcpi_retrans, |
|
|
162 | tcpi.tcpi_fackets, |
|
|
163 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
|
|
164 | |
|
|
165 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
|
|
166 | #endif |
|
|
167 | |
|
|
168 | // fast-time-out a player by checking for missing acks |
|
|
169 | // do this only when player is active |
|
|
170 | if (pl && pl->active |
|
|
171 | && tcpi.tcpi_last_ack_recv > int (socket_timeout * 1000)) |
|
|
172 | { |
|
|
173 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
|
|
174 | write_outputbuffer (); |
|
|
175 | |
|
|
176 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
|
|
177 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
|
|
178 | destroy (); |
|
|
179 | } |
|
|
180 | } |
|
|
181 | #endif |
|
|
182 | |
|
|
183 | // limit budget surplus/deficit by one mss, add per-tick budget |
|
|
184 | rate_avail = min (rate_avail, mss) + max_rate; |
|
|
185 | |
|
|
186 | int max_send = rate_avail; |
|
|
187 | |
|
|
188 | #if HAVE_TCP_INFO |
|
|
189 | // further restrict the available bandwidth by the excess bandwidth available |
|
|
190 | min_it (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
|
|
191 | #endif |
|
|
192 | |
|
|
193 | // round to next-lowest mss |
|
|
194 | max_send -= max_send % mss; |
|
|
195 | |
|
|
196 | if (ixface.empty ()) |
|
|
197 | { |
|
|
198 | // regularly send a new face when queue is empty |
|
|
199 | if (bg_scrub && !--bg_scrub) |
|
|
200 | while (scrub_idx < faces.size () - 1) |
|
|
201 | { |
|
|
202 | ++scrub_idx; |
|
|
203 | |
|
|
204 | if (!faces_sent [scrub_idx]) |
|
|
205 | if (faceinfo *f = face_info (scrub_idx)) |
|
|
206 | if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now |
|
|
207 | { |
|
|
208 | send_face (scrub_idx, -120); |
|
|
209 | flush_fx (); |
|
|
210 | |
|
|
211 | bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
|
|
212 | break; |
|
|
213 | } |
|
|
214 | } |
|
|
215 | } |
|
|
216 | else |
|
|
217 | { |
|
|
218 | bg_scrub = BG_SCRUB_RATE; |
|
|
219 | |
|
|
220 | for (;;) |
|
|
221 | { |
|
|
222 | int avail = max_send - outputbuffer_len (); |
|
|
223 | |
|
|
224 | if (avail <= 0) |
|
|
225 | break; |
|
|
226 | |
|
|
227 | ixsend &ix = ixface.back (); |
|
|
228 | |
|
|
229 | if (facedata *d = face_data (ix.idx, faceset)) |
|
|
230 | { |
|
|
231 | // estimate the packet header overhead "ix " + idx + (new)ofs |
|
|
232 | int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
|
|
233 | int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
|
|
234 | |
|
|
235 | // only transfer something if the amount of data transferred |
|
|
236 | // has a healthy relation to the header overhead |
|
|
237 | if (chunk < 64) |
|
|
238 | break; |
|
|
239 | |
|
|
240 | chunk = min (chunk, (int)ix.ofs); |
|
|
241 | |
|
|
242 | ix.ofs -= chunk; |
|
|
243 | |
|
|
244 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
|
|
245 | |
|
|
246 | packet sl ("ix"); |
|
|
247 | |
|
|
248 | sl << ber32 (ix.idx) |
|
|
249 | << ber32 (ix.ofs) |
|
|
250 | << data (d->data + ix.ofs, chunk); |
|
|
251 | |
|
|
252 | send_packet (sl); |
|
|
253 | } |
|
|
254 | else |
|
|
255 | ix.ofs = 0; |
|
|
256 | |
|
|
257 | if (!ix.ofs) |
|
|
258 | { |
|
|
259 | ixface.pop_back (); |
|
|
260 | |
|
|
261 | if (ixface.empty ()) |
|
|
262 | break; |
|
|
263 | } |
|
|
264 | } |
|
|
265 | } |
|
|
266 | |
|
|
267 | rate_avail -= outputbuffer_len (); |
|
|
268 | } |
|
|
269 | |
|
|
270 | void |
|
|
271 | client::flush_sockets () |
|
|
272 | { |
| 176 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
273 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
| 177 | { |
274 | (*i)->flush (); |
| 178 | client *s = *i; |
275 | } |
| 179 | player *pl = s->pl; |
|
|
| 180 | |
276 | |
| 181 | s->handle_packet (); |
277 | void |
| 182 | s->handle_command (); |
278 | client::clock () |
|
|
279 | { |
|
|
280 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
|
|
281 | (*i)->tick (); |
| 183 | |
282 | |
|
|
283 | // give them all the same chances |
|
|
284 | flush_sockets (); |
|
|
285 | |
| 184 | //TODO: should not be done here, either |
286 | //TODO: should not be done here, either |
| 185 | if (s->status != Ns_Dead && pl) |
287 | for (unsigned i = 0; i < clients.size (); ++i) |
| 186 | { |
288 | clients[i]->refcnt_chk (); |
| 187 | /* Update the players stats once per tick. More efficient than |
|
|
| 188 | * sending them whenever they change, and probably just as useful |
|
|
| 189 | */ |
|
|
| 190 | esrv_update_stats (pl); |
|
|
| 191 | |
|
|
| 192 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
|
|
| 193 | { |
|
|
| 194 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
|
| 195 | if (pl->last_weight != WEIGHT (pl->ob)) |
|
|
| 196 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
|
|
| 197 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
|
|
| 198 | } |
|
|
| 199 | |
|
|
| 200 | draw_client_map (pl->ob); |
|
|
| 201 | |
|
|
| 202 | if (s->update_look) |
|
|
| 203 | esrv_draw_look (pl->ob); |
|
|
| 204 | } |
|
|
| 205 | } |
|
|
| 206 | } |
289 | } |
| 207 | |
290 | |
