| 1 | /* |
1 | /* |
| 2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
| 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 |
| 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 author can be reached via e-mail to <crossfire@schmorp.de> |
21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
| 22 | */ |
22 | */ |
| 23 | |
23 | |
| 24 | /** |
24 | /** |
| 25 | * \file |
25 | * \file |
| 26 | * Main client/server loops. |
26 | * Main client/server loops. |
| 27 | * |
27 | * |
| 28 | * \date 2003-12-02 |
28 | * \date 2003-12-02 |
| 29 | * |
29 | * |
| 30 | * loop.c mainly deals with initialization and higher level socket |
30 | * loop.c mainly deals with initialization and higher level socket |
| 31 | * maintenance (checking for lost connections and if data has arrived.) |
31 | * maintanance (checking for lost connections and if data has arrived.) |
| 32 | * The reading of data is handled in ericserver.c |
|
|
| 33 | */ |
32 | */ |
| 34 | |
|
|
| 35 | |
33 | |
| 36 | #include <global.h> |
34 | #include <global.h> |
| 37 | #include <sproto.h> |
35 | #include <sproto.h> |
| 38 | #include <sockproto.h> |
36 | #include <sockproto.h> |
| 39 | |
37 | |
| … | |
… | |
| 46 | #include <unistd.h> |
44 | #include <unistd.h> |
| 47 | #include <arpa/inet.h> |
45 | #include <arpa/inet.h> |
| 48 | |
46 | |
| 49 | #include <loader.h> |
47 | #include <loader.h> |
| 50 | |
48 | |
|
|
49 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
|
|
50 | |
| 51 | #define MAX_QUEUE_DEPTH 500 //TODO |
51 | #define MAX_QUEUE_DEPTH 500 |
| 52 | #define MAX_QUEUE_BACKLOG 5. //TODO |
52 | #define MAX_QUEUE_BACKLOG 3. |
| 53 | |
53 | |
| 54 | void |
54 | void |
| 55 | client::reset_state () |
55 | client::reset_state () |
| 56 | { |
56 | { |
| 57 | if (!pl) |
57 | if (!pl) |
| … | |
… | |
| 62 | } |
62 | } |
| 63 | |
63 | |
| 64 | void |
64 | void |
| 65 | client::queue_command (packet_type *handler, char *data, int datalen) |
65 | client::queue_command (packet_type *handler, char *data, int datalen) |
| 66 | { |
66 | { |
| 67 | tstamp stamp = now (); |
67 | tstamp stamp = NOW; |
| 68 | |
68 | |
| 69 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
69 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
| 70 | { |
70 | { |
| 71 | //TODO: just disconnect here? |
71 | //TODO: just disconnect here? |
| 72 | reset_state (); |
72 | reset_state (); |
| 73 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
73 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
| 74 | } |
|
|
| 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 | } |
74 | } |
| 80 | else |
75 | else |
| 81 | { |
76 | { |
| 82 | cmd_queue.push_back (command ()); |
77 | cmd_queue.push_back (command ()); |
| 83 | command &cmd = cmd_queue.back (); |
78 | command &cmd = cmd_queue.back (); |
| 84 | cmd.stamp = stamp; |
79 | cmd.stamp = stamp; |
| 85 | cmd.handler = handler; |
80 | cmd.handler = handler; |
| 86 | cmd.data = (char *)salloc (datalen + 1, data); |
81 | cmd.data = salloc<char> (datalen + 1, data); |
| 87 | cmd.datalen = datalen; |
82 | cmd.datalen = datalen; |
| 88 | } |
83 | } |
| 89 | } |
84 | } |
| 90 | |
85 | |
| 91 | bool |
86 | bool |
| 92 | client::handle_command () |
87 | client::handle_command () |
| 93 | { |
88 | { |
| 94 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
89 | if (!cmd_queue.empty () |
|
|
90 | && state == ST_PLAYING |
|
|
91 | && pl->ob->speed_left > 0.f) |
|
|
92 | { |
|
|
93 | command &cmd = cmd_queue.front (); |
|
|
94 | |
|
|
95 | if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
|
|
96 | { |
|
|
97 | reset_state (); |
|
|
98 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
|
|
99 | } |
|
|
100 | else |
|
|
101 | execute (cmd.handler, cmd.data, cmd.datalen); |
|
|
102 | |
|
|
103 | cmd_queue.pop_front (); |
|
|
104 | return true; |
|
|
105 | } |
|
|
106 | else |
| 95 | return false; |
107 | return false; |
| 96 | |
|
|
| 97 | if (cmd_queue.empty ()) |
|
|
| 98 | return false; |
|
|
| 99 | |
|
|
| 100 | command &cmd = cmd_queue.front (); |
|
|
| 101 | |
|
|
| 102 | if (cmd.stamp + MAX_QUEUE_BACKLOG < now ()) |
|
|
| 103 | { |
|
|
| 104 | reset_state (); |
|
|
| 105 | send_packet_printf ("drawinfo %d ignoring delayed command.", NDI_RED); |
|
|
| 106 | } |
|
|
| 107 | else |
|
|
| 108 | execute (cmd.handler, cmd.data, cmd.datalen); |
|
|
| 109 | |
|
|
| 110 | cmd_queue.pop_front (); |
|
|
| 111 | |
|
|
| 112 | return true; |
|
|
| 113 | } |
108 | } |
| 114 | |
109 | |
| 115 | void |
110 | void |
| 116 | flush_sockets (void) |
111 | flush_sockets (void) |
| 117 | { |
112 | { |
| 118 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
113 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
| 119 | if ((*i)->status != Ns_Dead) |
|
|
| 120 | (*i)->flush (); |
114 | (*i)->flush (); |
| 121 | } |
115 | } |
| 122 | |
116 | |
| 123 | /** |
117 | /** |
| 124 | * This checks the sockets for input, does the right thing. |
118 | * This checks the sockets for input, does the right thing. |
| 125 | * |
119 | * |
| … | |
… | |
| 128 | * |
122 | * |
| 129 | */ |
123 | */ |
| 130 | void |
124 | void |
| 131 | doeric_server (void) |
125 | doeric_server (void) |
| 132 | { |
126 | { |
| 133 | #ifdef CS_LOGSTATS |
127 | //TODO: should not be done here, either |
| 134 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
128 | for (unsigned i = 0; i < clients.size (); ++i) |
| 135 | write_cs_stats (); |
129 | { |
|
|
130 | client *ns = clients [i]; |
|
|
131 | |
|
|
132 | ns->tick (); |
|
|
133 | ns->refcnt_chk (); |
|
|
134 | } |
|
|
135 | } |
|
|
136 | |
|
|
137 | void |
|
|
138 | client::tick () |
|
|
139 | { |
|
|
140 | if (!pl || destroyed ()) |
|
|
141 | return; |
|
|
142 | |
|
|
143 | /* Update the players stats once per tick. More efficient than |
|
|
144 | * sending them whenever they change, and probably just as useful |
|
|
145 | */ |
|
|
146 | esrv_update_stats (pl); |
|
|
147 | |
|
|
148 | if (last_weight != -1 && last_weight != WEIGHT (pl->ob)) |
|
|
149 | { |
|
|
150 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
|
151 | if (last_weight != WEIGHT (pl->ob)) |
|
|
152 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
|
|
153 | (unsigned long) last_weight, WEIGHT (pl->ob)); |
|
|
154 | } |
|
|
155 | |
|
|
156 | draw_client_map (pl); |
|
|
157 | |
|
|
158 | if (update_look) |
|
|
159 | esrv_draw_look (pl); |
|
|
160 | |
|
|
161 | if (ixface.empty ()) |
|
|
162 | { |
|
|
163 | // regularly send a new face when queue is empty |
|
|
164 | if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
|
|
165 | while (scrub_idx < faces.size () - 1) |
|
|
166 | { |
|
|
167 | ++scrub_idx; |
|
|
168 | |
|
|
169 | if (!faces_sent [scrub_idx]) |
|
|
170 | { |
|
|
171 | send_face (scrub_idx, -120); |
|
|
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 | bool overload = false; |
|
|
184 | |
|
|
185 | #if HAVE_TCP_INFO |
|
|
186 | // do bandwidth checking |
|
|
187 | if (tcpi.tcpi_unacked + 1 > max (4, tcpi.tcpi_snd_cwnd)) |
|
|
188 | { |
|
|
189 | overload = true; |
|
|
190 | if (next_rate_adjust <= NOW) |
|
|
191 | { |
|
|
192 | next_rate_adjust = NOW + 2; |
|
|
193 | max_rate = max (max_rate >> 1, int (5000 * TICK)); |
|
|
194 | LOG (llevDebug, "tcp %s overloaded (%d + 1 > 4 | %d), rate now %d\n", |
|
|
195 | host, (int)tcpi.tcpi_unacked, (int)tcpi.tcpi_snd_cwnd, int (max_rate / TICK));//D |
|
|
196 | send_packet_printf ("drawinfo %d Due to possible network congestion, your output-rate has been reduced to %dbps.", |
|
|
197 | NDI_RED, int (max_rate / TICK)); |
|
|
198 | } |
|
|
199 | } |
| 136 | #endif |
200 | #endif |
| 137 | |
201 | |
| 138 | /* Go through the players. Let the loop set the next pl value, |
202 | if (!overload) |
| 139 | * since we may remove some |
|
|
| 140 | */ |
|
|
| 141 | //TODO: must be handled cleanly elsewhere |
|
|
| 142 | for (player *pl = first_player; pl; ) |
|
|
| 143 | { |
|
|
| 144 | player *npl = pl->next; |
|
|
| 145 | |
|
|
| 146 | //TODO: must be handled cleanly elsewhere |
|
|
| 147 | if (!pl->socket || pl->socket->status == Ns_Dead) |
|
|
| 148 | { |
203 | { |
| 149 | save_player (pl->ob, 0); |
204 | int ol = outputbuffer_len (); |
| 150 | |
205 | |
| 151 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
206 | rate_avail = min (max_rate, rate_avail + max_rate); |
|
|
207 | rate_avail -= ol; |
|
|
208 | |
|
|
209 | int avail = rate_avail; |
|
|
210 | |
|
|
211 | // if we can split images, transfer up to mss-sized packets if possible |
|
|
212 | // but never 768 bytes more. |
|
|
213 | if (fxix) avail += min (768, mss - (ol % mss)); |
|
|
214 | |
|
|
215 | bg_scrub = BG_SCRUB_RATE; |
|
|
216 | |
|
|
217 | while (avail > 0) |
| 152 | { |
218 | { |
| 153 | terminate_all_pets (pl->ob); |
219 | ixsend &ix = ixface.back (); |
| 154 | pl->ob->remove (); |
220 | |
|
|
221 | if (facedata *d = face_data (ix.idx, faceset)) |
|
|
222 | { |
|
|
223 | if (fxix) |
|
|
224 | { |
|
|
225 | // only transfer something if the amount of data transferred |
|
|
226 | // has a healthy relation to the header overhead |
|
|
227 | if (avail <= 40) |
|
|
228 | break; |
|
|
229 | |
|
|
230 | // 9 bytes is enough for fx_FFFOOO |
|
|
231 | int chunk = min (min (avail, MAXSOCKBUF - 9), (int)ix.ofs); |
|
|
232 | |
|
|
233 | if (chunk <= 0) |
|
|
234 | break; |
|
|
235 | |
|
|
236 | ix.ofs -= chunk; |
|
|
237 | |
|
|
238 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
|
|
239 | |
|
|
240 | packet sl ("ix"); |
|
|
241 | |
|
|
242 | sl << ber32 (ix.idx) |
|
|
243 | << ber32 (ix.ofs) |
|
|
244 | << data (d->data.data () + ix.ofs, chunk); |
|
|
245 | |
|
|
246 | send_packet (sl); |
|
|
247 | } |
|
|
248 | else |
|
|
249 | { |
|
|
250 | send_image (ix.idx); |
|
|
251 | ix.ofs = 0; |
|
|
252 | } |
|
|
253 | } |
|
|
254 | else |
|
|
255 | ix.ofs = 0; |
|
|
256 | |
|
|
257 | int consumed = outputbuffer_len () - ol; |
|
|
258 | |
|
|
259 | avail -= consumed; |
|
|
260 | rate_avail -= consumed; |
|
|
261 | |
|
|
262 | ol = outputbuffer_len (); |
|
|
263 | |
|
|
264 | if (!ix.ofs) |
|
|
265 | { |
|
|
266 | ixface.pop_back (); |
|
|
267 | |
|
|
268 | if (ixface.empty ()) |
|
|
269 | break; |
|
|
270 | } |
| 155 | } |
271 | } |
| 156 | |
|
|
| 157 | leave (pl, 1); |
|
|
| 158 | final_free_player (pl); |
|
|
| 159 | } |
272 | } |
| 160 | |
|
|
| 161 | pl = npl; |
|
|
| 162 | } |
|
|
| 163 | |
|
|
| 164 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ) |
|
|
| 165 | { |
273 | } |
| 166 | client *s = *i; |
|
|
| 167 | |
|
|
| 168 | if (s->status == Ns_Dead) |
|
|
| 169 | { |
|
|
| 170 | clients.erase (i); |
|
|
| 171 | delete s; |
|
|
| 172 | } |
|
|
| 173 | else |
|
|
| 174 | ++i; |
|
|
| 175 | } |
|
|
| 176 | |
|
|
| 177 | /* We need to do some of the processing below regardless */ |
|
|
| 178 | |
|
|
| 179 | /* Check for any input on the sockets */ |
|
|
| 180 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
|
|
| 181 | { |
|
|
| 182 | client *s = *i; |
|
|
| 183 | player *pl = s->pl; |
|
|
| 184 | |
|
|
| 185 | s->handle_packet (); |
|
|
| 186 | s->handle_command (); |
|
|
| 187 | |
|
|
| 188 | //TODO: should not be done here, either |
|
|
| 189 | if (s->status != Ns_Dead && pl) |
|
|
| 190 | { |
|
|
| 191 | /* Update the players stats once per tick. More efficient than |
|
|
| 192 | * sending them whenever they change, and probably just as useful |
|
|
| 193 | */ |
|
|
| 194 | esrv_update_stats (pl); |
|
|
| 195 | |
|
|
| 196 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
|
|
| 197 | { |
|
|
| 198 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
|
| 199 | if (pl->last_weight != WEIGHT (pl->ob)) |
|
|
| 200 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
|
|
| 201 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
|
|
| 202 | } |
|
|
| 203 | |
|
|
| 204 | draw_client_map (pl->ob); |
|
|
| 205 | |
|
|
| 206 | if (s->update_look) |
|
|
| 207 | esrv_draw_look (pl->ob); |
|
|
| 208 | } |
|
|
| 209 | } |
|
|
| 210 | } |
274 | } |
| 211 | |
275 | |
