| 1 | /* |
1 | /* |
| 2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 | * |
3 | * |
| 4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 | * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team |
5 | * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team |
| 6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
| 7 | * |
7 | * |
| 8 | * Crossfire TRT is free software: you can redistribute it and/or modify |
8 | * Deliantra is free software: you can redistribute it and/or modify |
| 9 | * 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 |
| 10 | * the Free Software Foundation, either version 3 of the License, or |
10 | * the Free Software Foundation, either version 3 of the License, or |
| 11 | * (at your option) any later version. |
11 | * (at your option) any later version. |
| 12 | * |
12 | * |
| 13 | * 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, |
| … | |
… | |
| 16 | * GNU General Public License for more details. |
16 | * GNU General Public License for more details. |
| 17 | * |
17 | * |
| 18 | * 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 |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | * |
20 | * |
| 21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
21 | * The authors can be reached via e-mail to <support@deliantra.net> |
| 22 | */ |
22 | */ |
| 23 | |
23 | |
| 24 | /** |
24 | /** |
| 25 | * \file |
25 | * \file |
| 26 | * Main client/server loops. |
26 | * Main client/server loops. |
| … | |
… | |
| 46 | |
46 | |
| 47 | #include <loader.h> |
47 | #include <loader.h> |
| 48 | |
48 | |
| 49 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
49 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
| 50 | |
50 | |
| 51 | #define MAX_QUEUE_DEPTH 500 |
51 | #define MAX_QUEUE_DEPTH 50 |
| 52 | #define MAX_QUEUE_BACKLOG 3. |
52 | #define MAX_QUEUE_BACKLOG 3. |
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53 | |
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54 | // disconnect a socket after this many seconds without an ack |
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55 | #define SOCKET_TIMEOUT 16. |
| 53 | |
56 | |
| 54 | void |
57 | void |
| 55 | client::reset_state () |
58 | client::reset_state () |
| 56 | { |
59 | { |
| 57 | if (!pl) |
60 | if (!pl) |
| … | |
… | |
| 72 | reset_state (); |
75 | reset_state (); |
| 73 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
76 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
| 74 | } |
77 | } |
| 75 | else |
78 | else |
| 76 | { |
79 | { |
| 77 | cmd_queue.push_back (command ()); |
80 | cmd_queue.resize (cmd_queue.size () + 1); |
| 78 | command &cmd = cmd_queue.back (); |
81 | command &cmd = cmd_queue.back (); |
| 79 | cmd.stamp = stamp; |
82 | cmd.stamp = stamp; |
| 80 | cmd.handler = handler; |
83 | cmd.handler = handler; |
| 81 | cmd.data = salloc<char> (datalen + 1, data); |
84 | cmd.data = salloc<char> (datalen + 1, data); |
| 82 | cmd.datalen = datalen; |
85 | cmd.datalen = datalen; |
| … | |
… | |
| 98 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
101 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
| 99 | } |
102 | } |
| 100 | else |
103 | else |
| 101 | execute (cmd.handler, cmd.data, cmd.datalen); |
104 | execute (cmd.handler, cmd.data, cmd.datalen); |
| 102 | |
105 | |
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|
106 | sfree<char> (cmd.data, cmd.datalen + 1); |
| 103 | cmd_queue.pop_front (); |
107 | cmd_queue.pop_front (); |
| 104 | return true; |
108 | return true; |
| 105 | } |
109 | } |
| 106 | else |
110 | else |
| 107 | return false; |
111 | return false; |
| 108 | } |
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|
| 109 | |
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| 110 | void |
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| 111 | flush_sockets (void) |
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| 112 | { |
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| 113 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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| 114 | (*i)->flush (); |
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| 115 | } |
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| 116 | |
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| 117 | /** |
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| 118 | * This checks the sockets for input, does the right thing. |
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| 119 | * |
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| 120 | * A bit of this code is grabbed out of socket.c |
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| 121 | * There are 2 lists we need to look through - init_sockets is a list |
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| 122 | * |
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| 123 | */ |
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| 124 | void |
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| 125 | doeric_server (void) |
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| 126 | { |
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| 127 | //TODO: should not be done here, either |
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| 128 | for (unsigned i = 0; i < clients.size (); ++i) |
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| 129 | { |
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| 130 | client *ns = clients [i]; |
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| 131 | |
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| 132 | ns->tick (); |
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| 133 | ns->refcnt_chk (); |
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| 134 | } |
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| 135 | } |
112 | } |
| 136 | |
113 | |
| 137 | void |
114 | void |
| 138 | client::tick () |
115 | client::tick () |
| 139 | { |
116 | { |
| … | |
… | |
| 155 | |
132 | |
| 156 | draw_client_map (pl); |
133 | draw_client_map (pl); |
| 157 | |
134 | |
| 158 | if (update_look) |
135 | if (update_look) |
| 159 | esrv_draw_look (pl); |
136 | esrv_draw_look (pl); |
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137 | |
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138 | mapinfo_queue_run (); |
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139 | |
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140 | #if HAVE_TCP_INFO |
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141 | // check time of last ack, and, if too old, kill connection |
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142 | socklen_t len = sizeof (tcpi); |
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143 | |
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144 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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145 | { |
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146 | if (tcpi.tcpi_snd_mss) |
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147 | mss = tcpi.tcpi_snd_mss; |
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148 | |
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149 | #if 0 |
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150 | 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", |
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151 | tcpi.tcpi_unacked, |
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152 | tcpi.tcpi_sacked, |
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153 | tcpi.tcpi_lost, |
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154 | tcpi.tcpi_retrans, |
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155 | tcpi.tcpi_fackets, |
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156 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
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157 | |
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158 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
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159 | #endif |
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160 | |
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161 | // fast-time-out a player by checking for missign acks |
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162 | // do this only when player is active |
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163 | if (pl && pl->active |
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164 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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165 | { |
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166 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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167 | write_outputbuffer (); |
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168 | |
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169 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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170 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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171 | destroy (); |
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172 | } |
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173 | } |
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174 | #endif |
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175 | |
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176 | rate_avail = min (max_rate + mss, rate_avail + max_rate); |
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177 | |
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178 | int max_send = rate_avail; |
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179 | |
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180 | #if HAVE_TCP_INFO |
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181 | // further restrict the available bandwidth by the excess bandwidth available |
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182 | max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
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183 | #endif |
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184 | |
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185 | // if we can split images, round to next-lowest mss |
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186 | if (fxix) max_send -= max_send % mss; |
| 160 | |
187 | |
| 161 | if (ixface.empty ()) |
188 | if (ixface.empty ()) |
| 162 | { |
189 | { |
| 163 | // regularly send a new face when queue is empty |
190 | // regularly send a new face when queue is empty |
| 164 | if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
191 | if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
| 165 | while (scrub_idx < faces.size () - 1) |
192 | while (scrub_idx < faces.size () - 1) |
| 166 | { |
193 | { |
| 167 | ++scrub_idx; |
194 | ++scrub_idx; |
| 168 | |
195 | |
| 169 | if (!faces_sent [scrub_idx]) |
196 | if (!faces_sent [scrub_idx]) |
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197 | if (faceinfo *f = face_info (scrub_idx)) |
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198 | if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now |
| 170 | { |
199 | { |
| 171 | send_face (scrub_idx); |
200 | send_face (scrub_idx, -120); |
| 172 | flush_fx (); |
201 | flush_fx (); |
| 173 | |
202 | |
| 174 | bg_scrub = 1; // send up to one face per tick, unless an image was requested |
203 | bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
| 175 | break; |
204 | break; |
| 176 | } |
205 | } |
| 177 | } |
206 | } |
| 178 | |
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| 179 | rate_avail = max_rate - outputbuffer_len (); |
|
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| 180 | } |
|
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| 181 | else if (!outq) // only send when bandwidht allows it |
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| 182 | { |
207 | } |
| 183 | int ol = outputbuffer_len (); |
208 | else |
| 184 | |
209 | { |
| 185 | rate_avail = min (max_rate, rate_avail + max_rate); |
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| 186 | rate_avail -= ol; |
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| 187 | |
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| 188 | int avail = rate_avail; |
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| 189 | |
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| 190 | // if we can split images, transfer up to mss-sized packets if possible |
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| 191 | // but never 768 bytes more. |
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| 192 | if (fxix) avail += min (768, mss - (ol % mss)); |
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| 193 | |
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| 194 | bg_scrub = BG_SCRUB_RATE; |
210 | bg_scrub = BG_SCRUB_RATE; |
| 195 | |
211 | |
| 196 | while (avail > 0) |
212 | for (;;) |
| 197 | { |
213 | { |
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214 | int avail = max_send - outputbuffer_len (); |
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215 | |
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216 | if (avail <= 0) |
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217 | break; |
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218 | |
| 198 | ixsend &ix = ixface.back (); |
219 | ixsend &ix = ixface.back (); |
| 199 | |
220 | |
| 200 | if (facedata *d = face_data (ix.idx, faceset)) |
221 | if (facedata *d = face_data (ix.idx, faceset)) |
| 201 | { |
222 | { |
| 202 | if (fxix) |
223 | if (fxix) |
| 203 | { |
224 | { |
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225 | // estimate the packet header overhead "ix " + idx + (new)ofs |
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226 | int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
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227 | int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
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228 | |
| 204 | // only transfer something if the amount of data transferred |
229 | // only transfer something if the amount of data transferred |
| 205 | // has a healthy relation to the header overhead |
230 | // has a healthy relation to the header overhead |
| 206 | if (avail <= 40) |
231 | if (chunk < 64) |
| 207 | break; |
232 | break; |
| 208 | |
233 | |
| 209 | // 9 bytes is enough for fx_FFFOOO |
234 | chunk = min (chunk, (int)ix.ofs); |
| 210 | int chunk = min (min (avail, MAXSOCKBUF - 9), (int)ix.ofs); |
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| 211 | |
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| 212 | if (chunk <= 0) |
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| 213 | break; |
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| 214 | |
235 | |
| 215 | ix.ofs -= chunk; |
236 | ix.ofs -= chunk; |
| 216 | |
237 | |
| 217 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
238 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
| 218 | |
239 | |
| … | |
… | |
| 231 | } |
252 | } |
| 232 | } |
253 | } |
| 233 | else |
254 | else |
| 234 | ix.ofs = 0; |
255 | ix.ofs = 0; |
| 235 | |
256 | |
| 236 | int consumed = outputbuffer_len () - ol; |
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| 237 | |
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| 238 | avail -= consumed; |
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| 239 | rate_avail -= consumed; |
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| 240 | |
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| 241 | ol = outputbuffer_len (); |
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| 242 | |
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| 243 | if (!ix.ofs) |
257 | if (!ix.ofs) |
| 244 | { |
258 | { |
| 245 | ixface.pop_back (); |
259 | ixface.pop_back (); |
| 246 | |
260 | |
| 247 | if (ixface.empty ()) |
261 | if (ixface.empty ()) |
| 248 | break; |
262 | break; |
| 249 | } |
263 | } |
| 250 | } |
264 | } |
| 251 | } |
265 | } |
| 252 | } |
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| 253 | |
266 | |
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267 | rate_avail -= outputbuffer_len (); |
|
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268 | } |
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269 | |
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270 | void |
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271 | client::flush_sockets (void) |
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272 | { |
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273 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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274 | (*i)->flush (); |
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275 | } |
|
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276 | |
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277 | void |
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278 | client::clock (void) |
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279 | { |
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280 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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281 | (*i)->tick (); |
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282 | |
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283 | // give them all the same chances |
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284 | flush_sockets (); |
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285 | |
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286 | //TODO: should not be done here, either |
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287 | for (unsigned i = 0; i < clients.size (); ++i) |
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288 | clients[i]->refcnt_chk (); |
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289 | } |
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290 | |
