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 (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
5 | * Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team |
5 | * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team |
6 | * Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
7 | * |
7 | * |
8 | * 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 |
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 2 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, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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, write to the Free Software |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 | * |
20 | * |
22 | * 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> |
23 | */ |
22 | */ |
24 | |
23 | |
25 | /** |
24 | /** |
26 | * \file |
25 | * \file |
27 | * Main client/server loops. |
26 | * Main client/server loops. |
… | |
… | |
30 | * |
29 | * |
31 | * loop.c mainly deals with initialization and higher level socket |
30 | * loop.c mainly deals with initialization and higher level socket |
32 | * maintanance (checking for lost connections and if data has arrived.) |
31 | * maintanance (checking for lost connections and if data has arrived.) |
33 | */ |
32 | */ |
34 | |
33 | |
35 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
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36 | |
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37 | #include <global.h> |
34 | #include <global.h> |
38 | #include <sproto.h> |
35 | #include <sproto.h> |
39 | #include <sockproto.h> |
36 | #include <sockproto.h> |
40 | |
37 | |
41 | #include <sys/types.h> |
38 | #include <sys/types.h> |
… | |
… | |
47 | #include <unistd.h> |
44 | #include <unistd.h> |
48 | #include <arpa/inet.h> |
45 | #include <arpa/inet.h> |
49 | |
46 | |
50 | #include <loader.h> |
47 | #include <loader.h> |
51 | |
48 | |
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49 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
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50 | |
52 | #define MAX_QUEUE_DEPTH 500 //TODO |
51 | #define MAX_QUEUE_DEPTH 50 |
53 | #define MAX_QUEUE_BACKLOG 3. //TODO |
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 8. |
54 | |
56 | |
55 | void |
57 | void |
56 | client::reset_state () |
58 | client::reset_state () |
57 | { |
59 | { |
58 | if (!pl) |
60 | if (!pl) |
… | |
… | |
63 | } |
65 | } |
64 | |
66 | |
65 | void |
67 | void |
66 | client::queue_command (packet_type *handler, char *data, int datalen) |
68 | client::queue_command (packet_type *handler, char *data, int datalen) |
67 | { |
69 | { |
68 | tstamp stamp = now (); |
70 | tstamp stamp = NOW; |
69 | |
71 | |
70 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
72 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
71 | { |
73 | { |
72 | //TODO: just disconnect here? |
74 | //TODO: just disconnect here? |
73 | reset_state (); |
75 | reset_state (); |
… | |
… | |
85 | } |
87 | } |
86 | |
88 | |
87 | bool |
89 | bool |
88 | client::handle_command () |
90 | client::handle_command () |
89 | { |
91 | { |
90 | bool skipping = false; |
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91 | |
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92 | while (!cmd_queue.empty () |
92 | if (!cmd_queue.empty () |
93 | && !(state == ST_PLAYING && pl->ob && pl->ob->speed_left <= 0)) |
93 | && state == ST_PLAYING |
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94 | && pl->ob->speed_left > 0.f) |
94 | { |
95 | { |
95 | command &cmd = cmd_queue.front (); |
96 | command &cmd = cmd_queue.front (); |
96 | |
97 | |
97 | if (cmd.stamp + MAX_QUEUE_BACKLOG < now ()) |
98 | if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
98 | { |
99 | { |
99 | if (!skipping) |
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100 | { |
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101 | skipping = true; |
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102 | reset_state (); |
100 | reset_state (); |
103 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
101 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
104 | } |
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105 | |
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106 | cmd_queue.pop_front (); |
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107 | } |
102 | } |
108 | else |
103 | else |
109 | { |
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110 | execute (cmd.handler, cmd.data, cmd.datalen); |
104 | execute (cmd.handler, cmd.data, cmd.datalen); |
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105 | |
111 | cmd_queue.pop_front (); |
106 | cmd_queue.pop_front (); |
112 | return true; |
107 | return true; |
113 | } |
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114 | } |
108 | } |
115 | |
109 | else |
116 | return false; |
110 | return false; |
117 | } |
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118 | |
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119 | void |
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120 | flush_sockets (void) |
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121 | { |
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122 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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123 | (*i)->flush (); |
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124 | } |
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125 | |
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126 | /** |
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127 | * This checks the sockets for input, does the right thing. |
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128 | * |
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129 | * A bit of this code is grabbed out of socket.c |
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130 | * There are 2 lists we need to look through - init_sockets is a list |
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131 | * |
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132 | */ |
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133 | void |
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134 | doeric_server (void) |
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135 | { |
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136 | #ifdef CS_LOGSTATS |
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137 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
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138 | write_cs_stats (); |
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139 | #endif |
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140 | |
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141 | //TODO: should not be done here, either |
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142 | for (unsigned i = 0; i < clients.size (); ++i) |
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143 | { |
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144 | client *ns = clients [i]; |
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145 | |
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146 | ns->tick (); |
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147 | ns->refcnt_chk (); |
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148 | } |
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149 | } |
111 | } |
150 | |
112 | |
151 | void |
113 | void |
152 | client::tick () |
114 | client::tick () |
153 | { |
115 | { |
… | |
… | |
165 | if (last_weight != WEIGHT (pl->ob)) |
127 | 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", |
128 | 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)); |
129 | (unsigned long) last_weight, WEIGHT (pl->ob)); |
168 | } |
130 | } |
169 | |
131 | |
170 | draw_client_map (pl->ob); |
132 | draw_client_map (pl); |
171 | |
133 | |
172 | if (update_look) |
134 | if (update_look) |
173 | esrv_draw_look (pl->ob); |
135 | esrv_draw_look (pl); |
174 | |
136 | |
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137 | #if HAVE_TCP_INFO |
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138 | // check time of last ack, and, if too old, kill connection |
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139 | socklen_t len = sizeof (tcpi); |
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140 | |
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141 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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142 | { |
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143 | if (tcpi.tcpi_snd_mss) |
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144 | mss = tcpi.tcpi_snd_mss; |
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145 | |
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146 | #if 0 |
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147 | 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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148 | tcpi.tcpi_unacked, |
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149 | tcpi.tcpi_sacked, |
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150 | tcpi.tcpi_lost, |
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151 | tcpi.tcpi_retrans, |
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152 | tcpi.tcpi_fackets, |
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153 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
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154 | |
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155 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
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156 | #endif |
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157 | |
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158 | // do this only when player is active |
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159 | if (pl && pl->active |
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160 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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161 | { |
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162 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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163 | write_outputbuffer (); |
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164 | |
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165 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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166 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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167 | destroy (); |
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168 | } |
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169 | } |
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170 | #endif |
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171 | |
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172 | rate_avail = min (max_rate + mss, rate_avail + max_rate); |
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173 | |
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174 | int max_send = rate_avail; |
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175 | |
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176 | #if HAVE_TCP_INFO |
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177 | // further restrict the available bandwidth by the excess bandwidth available |
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178 | max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
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179 | #endif |
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180 | |
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181 | // if we can split images, round to next-lowest mss |
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182 | if (fxix) max_send -= max_send % mss; |
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183 | |
175 | if (askface.empty ()) |
184 | if (ixface.empty ()) |
176 | { |
185 | { |
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186 | // regularly send a new face when queue is empty |
177 | if (bg_scrub && !--bg_scrub) |
187 | if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
178 | while (scrub_idx < faces.size () - 1) |
188 | while (scrub_idx < faces.size () - 1) |
179 | { |
189 | { |
180 | ++scrub_idx; |
190 | ++scrub_idx; |
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191 | |
181 | if (!faces_sent [scrub_idx]) |
192 | if (!faces_sent [scrub_idx]) |
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193 | if (faceinfo *f = face_info (scrub_idx)) |
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194 | if (f->type == FT_FACE) // only scrub faces for now |
182 | { |
195 | { |
183 | send_face (scrub_idx); |
196 | send_face (scrub_idx, -120); |
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197 | flush_fx (); |
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198 | |
184 | bg_scrub = 1; // send up to one face per tick, unless an image was requested |
199 | bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
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200 | break; |
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201 | } |
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202 | } |
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203 | } |
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204 | else |
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205 | { |
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206 | bg_scrub = BG_SCRUB_RATE; |
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207 | |
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208 | for (;;) |
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209 | { |
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210 | int avail = max_send - outputbuffer_len (); |
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211 | |
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212 | if (avail <= 0) |
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213 | break; |
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214 | |
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215 | ixsend &ix = ixface.back (); |
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216 | |
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217 | if (facedata *d = face_data (ix.idx, faceset)) |
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218 | { |
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219 | if (fxix) |
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220 | { |
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221 | // estimate the packet header overhead "ix " + idx + (new)ofs |
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222 | int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
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223 | int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
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224 | |
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225 | // only transfer something if the amount of data transferred |
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226 | // has a healthy relation to the header overhead |
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227 | if (chunk < 64) |
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228 | break; |
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229 | |
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230 | chunk = min (chunk, (int)ix.ofs); |
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231 | |
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232 | ix.ofs -= chunk; |
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233 | |
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234 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
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235 | |
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236 | packet sl ("ix"); |
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237 | |
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238 | sl << ber32 (ix.idx) |
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239 | << ber32 (ix.ofs) |
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240 | << data (d->data.data () + ix.ofs, chunk); |
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241 | |
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242 | send_packet (sl); |
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243 | } |
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244 | else |
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245 | { |
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246 | send_image (ix.idx); |
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247 | ix.ofs = 0; |
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248 | } |
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249 | } |
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250 | else |
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251 | ix.ofs = 0; |
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252 | |
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253 | if (!ix.ofs) |
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254 | { |
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255 | ixface.pop_back (); |
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256 | |
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257 | if (ixface.empty ()) |
185 | break; |
258 | break; |
186 | } |
259 | } |
187 | } |
260 | } |
188 | } |
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189 | else |
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190 | while (!askface.empty () && outputbuffer_len () < max_rate) |
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191 | { |
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192 | // use a lifo to send most recently requested images |
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193 | faceidx face = askface.back (); |
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194 | askface.pop_back (); |
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195 | |
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196 | send_image (face); |
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197 | |
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198 | bg_scrub = BG_SCRUB_RATE; |
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199 | } |
261 | } |
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262 | |
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263 | rate_avail -= outputbuffer_len (); |
200 | } |
264 | } |
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265 | |
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266 | void |
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267 | client::flush_sockets (void) |
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268 | { |
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269 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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270 | (*i)->flush (); |
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271 | } |
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272 | |
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273 | void |
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274 | client::clock (void) |
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275 | { |
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276 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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277 | (*i)->tick (); |
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278 | |
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279 | // give them all the same chances |
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280 | flush_sockets (); |
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281 | |
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282 | //TODO: should not be done here, either |
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283 | for (unsigned i = 0; i < clients.size (); ++i) |
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284 | clients[i]->refcnt_chk (); |
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285 | } |
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286 | |