1 |
elmex |
1.1 |
/* |
2 |
root |
1.70 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 |
root |
1.93 |
* |
4 |
root |
1.100 |
* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 |
root |
1.93 |
* |
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root |
1.82 |
* Deliantra is free software: you can redistribute it and/or modify it under |
7 |
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* the terms of the Affero GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or (at your |
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* option) any later version. |
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root |
1.93 |
* |
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root |
1.55 |
* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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root |
1.93 |
* |
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root |
1.82 |
* You should have received a copy of the Affero GNU General Public License |
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* and the GNU General Public License along with this program. If not, see |
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* <http://www.gnu.org/licenses/>. |
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root |
1.93 |
* |
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root |
1.70 |
* The authors can be reached via e-mail to <support@deliantra.net> |
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pippijn |
1.39 |
*/ |
22 |
elmex |
1.1 |
|
23 |
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/** |
24 |
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* \file |
25 |
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* Main client/server loops. |
26 |
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* |
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* \date 2003-12-02 |
28 |
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* |
29 |
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* loop.c mainly deals with initialization and higher level socket |
30 |
root |
1.26 |
* maintanance (checking for lost connections and if data has arrived.) |
31 |
elmex |
1.1 |
*/ |
32 |
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33 |
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#include <global.h> |
34 |
root |
1.10 |
#include <sproto.h> |
35 |
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#include <sockproto.h> |
36 |
elmex |
1.1 |
|
37 |
pippijn |
1.8 |
#include <sys/types.h> |
38 |
|
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#include <sys/time.h> |
39 |
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#include <sys/socket.h> |
40 |
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#include <netinet/in.h> |
41 |
|
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#include <netdb.h> |
42 |
elmex |
1.1 |
|
43 |
root |
1.16 |
#include <unistd.h> |
44 |
|
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#include <arpa/inet.h> |
45 |
elmex |
1.1 |
|
46 |
root |
1.51 |
#define BG_SCRUB_RATE 4 // how often to send a face in the background |
47 |
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|
48 |
root |
1.65 |
#define MAX_QUEUE_DEPTH 50 |
49 |
root |
1.51 |
#define MAX_QUEUE_BACKLOG 3. |
50 |
elmex |
1.1 |
|
51 |
root |
1.21 |
void |
52 |
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client::reset_state () |
53 |
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{ |
54 |
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if (!pl) |
55 |
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return; |
56 |
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|
57 |
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pl->run_on = 0; |
58 |
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pl->fire_on = 0; |
59 |
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} |
60 |
elmex |
1.1 |
|
61 |
root |
1.20 |
void |
62 |
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client::queue_command (packet_type *handler, char *data, int datalen) |
63 |
root |
1.6 |
{ |
64 |
root |
1.51 |
tstamp stamp = NOW; |
65 |
elmex |
1.1 |
|
66 |
root |
1.20 |
if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
67 |
root |
1.21 |
{ |
68 |
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reset_state (); |
69 |
root |
1.99 |
send_packet_printf ("msg %d log command queue overflow, ignoring.", NDI_RED); |
70 |
root |
1.21 |
} |
71 |
root |
1.20 |
else |
72 |
root |
1.24 |
{ |
73 |
root |
1.71 |
cmd_queue.resize (cmd_queue.size () + 1); |
74 |
root |
1.24 |
command &cmd = cmd_queue.back (); |
75 |
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cmd.stamp = stamp; |
76 |
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cmd.handler = handler; |
77 |
root |
1.25 |
cmd.data = salloc<char> (datalen + 1, data); |
78 |
root |
1.24 |
cmd.datalen = datalen; |
79 |
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} |
80 |
root |
1.20 |
} |
81 |
elmex |
1.1 |
|
82 |
root |
1.20 |
bool |
83 |
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client::handle_command () |
84 |
elmex |
1.1 |
{ |
85 |
root |
1.48 |
if (!cmd_queue.empty () |
86 |
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&& state == ST_PLAYING |
87 |
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&& pl->ob->speed_left > 0.f) |
88 |
root |
1.26 |
{ |
89 |
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command &cmd = cmd_queue.front (); |
90 |
root |
1.6 |
|
91 |
root |
1.51 |
if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
92 |
root |
1.26 |
{ |
93 |
root |
1.79 |
reset_state (); // the command might actually reset some movement state etc. |
94 |
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95 |
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if (pl) |
96 |
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pl->failmsg ( |
97 |
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"Cannot keep up with your commands, ignoring them! " |
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"H<Your character cannot keep up with the instructions you give G<him|her>. " |
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"Try issuing commands slower, or, if G<he|she> is incapacitated (paralyzed and so on), " |
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"wait till your character can act again.\n\nIf G<he|she> is permanently stuck, then " |
101 |
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"try the B<suicide> command (or use B<chat> to ask somebody to B<invite> you out).>" |
102 |
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); |
103 |
root |
1.26 |
} |
104 |
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else |
105 |
root |
1.48 |
execute (cmd.handler, cmd.data, cmd.datalen); |
106 |
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|
107 |
root |
1.71 |
sfree<char> (cmd.data, cmd.datalen + 1); |
108 |
root |
1.48 |
cmd_queue.pop_front (); |
109 |
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return true; |
110 |
root |
1.21 |
} |
111 |
root |
1.48 |
else |
112 |
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return false; |
113 |
elmex |
1.1 |
} |
114 |
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|
115 |
root |
1.6 |
void |
116 |
root |
1.42 |
client::tick () |
117 |
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{ |
118 |
root |
1.94 |
if (destroyed ()) |
119 |
root |
1.42 |
return; |
120 |
root |
1.37 |
|
121 |
root |
1.94 |
if (pl) |
122 |
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{ |
123 |
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pl->dirty = true; |
124 |
root |
1.75 |
|
125 |
root |
1.94 |
/* Update the players stats once per tick. More efficient than |
126 |
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* sending them whenever they change, and probably just as useful |
127 |
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*/ |
128 |
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pl->need_updated_stats (); |
129 |
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esrv_update_stats (pl); |
130 |
root |
1.85 |
|
131 |
root |
1.94 |
if (pl->ns->update_spells) |
132 |
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esrv_update_spells (pl); |
133 |
root |
1.20 |
|
134 |
root |
1.94 |
sint32 weight = pl->ob->client_weight (); |
135 |
root |
1.74 |
|
136 |
root |
1.94 |
if (last_weight != weight) |
137 |
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{ |
138 |
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pl->ob->update_stats (); |
139 |
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esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
140 |
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} |
141 |
root |
1.6 |
|
142 |
root |
1.94 |
draw_client_map (pl); |
143 |
root |
1.20 |
|
144 |
root |
1.94 |
if (update_look) |
145 |
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esrv_draw_look (pl); |
146 |
root |
1.41 |
|
147 |
root |
1.94 |
mapinfo_queue_run (); |
148 |
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} |
149 |
root |
1.69 |
|
150 |
root |
1.66 |
#if HAVE_TCP_INFO |
151 |
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// check time of last ack, and, if too old, kill connection |
152 |
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socklen_t len = sizeof (tcpi); |
153 |
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|
154 |
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if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
155 |
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{ |
156 |
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if (tcpi.tcpi_snd_mss) |
157 |
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mss = tcpi.tcpi_snd_mss; |
158 |
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|
159 |
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#if 0 |
160 |
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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", |
161 |
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tcpi.tcpi_unacked, |
162 |
|
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tcpi.tcpi_sacked, |
163 |
|
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tcpi.tcpi_lost, |
164 |
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tcpi.tcpi_retrans, |
165 |
|
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tcpi.tcpi_fackets, |
166 |
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tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
167 |
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|
168 |
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tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
169 |
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#endif |
170 |
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|
171 |
root |
1.80 |
// fast-time-out a player by checking for missing acks |
172 |
root |
1.66 |
// do this only when player is active |
173 |
|
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if (pl && pl->active |
174 |
root |
1.81 |
&& tcpi.tcpi_last_ack_recv > int (socket_timeout * 1000)) |
175 |
root |
1.66 |
{ |
176 |
|
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send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
177 |
|
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write_outputbuffer (); |
178 |
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|
179 |
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LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
180 |
|
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(unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
181 |
|
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destroy (); |
182 |
|
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} |
183 |
|
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} |
184 |
|
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#endif |
185 |
|
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|
186 |
root |
1.90 |
// limit budget surplus/deficit by one mss, add per-tick budget |
187 |
|
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rate_avail = min (rate_avail, mss) + max_rate; |
188 |
root |
1.66 |
|
189 |
|
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int max_send = rate_avail; |
190 |
|
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|
191 |
|
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#if HAVE_TCP_INFO |
192 |
|
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// further restrict the available bandwidth by the excess bandwidth available |
193 |
root |
1.90 |
min_it (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
194 |
root |
1.66 |
#endif |
195 |
|
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|
196 |
root |
1.78 |
// round to next-lowest mss |
197 |
|
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max_send -= max_send % mss; |
198 |
root |
1.66 |
|
199 |
root |
1.65 |
if (ixface.empty ()) |
200 |
|
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{ |
201 |
|
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// regularly send a new face when queue is empty |
202 |
root |
1.78 |
if (bg_scrub && !--bg_scrub) |
203 |
root |
1.65 |
while (scrub_idx < faces.size () - 1) |
204 |
|
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{ |
205 |
|
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++scrub_idx; |
206 |
|
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|
207 |
|
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if (!faces_sent [scrub_idx]) |
208 |
|
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if (faceinfo *f = face_info (scrub_idx)) |
209 |
root |
1.97 |
if (f->type == FT_IMAGE || f->type == FT_SOUND) // only scrub faces and sounds for now |
210 |
root |
1.65 |
{ |
211 |
|
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send_face (scrub_idx, -120); |
212 |
|
|
flush_fx (); |
213 |
|
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|
214 |
root |
1.66 |
bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
215 |
root |
1.65 |
break; |
216 |
|
|
} |
217 |
|
|
} |
218 |
|
|
} |
219 |
|
|
else |
220 |
|
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{ |
221 |
root |
1.66 |
bg_scrub = BG_SCRUB_RATE; |
222 |
root |
1.65 |
|
223 |
root |
1.66 |
for (;;) |
224 |
|
|
{ |
225 |
|
|
int avail = max_send - outputbuffer_len (); |
226 |
root |
1.64 |
|
227 |
root |
1.66 |
if (avail <= 0) |
228 |
|
|
break; |
229 |
root |
1.65 |
|
230 |
|
|
ixsend &ix = ixface.back (); |
231 |
root |
1.44 |
|
232 |
root |
1.95 |
// estimate the packet header overhead "ix " + idx + (new)ofs |
233 |
|
|
int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
234 |
|
|
int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
235 |
|
|
|
236 |
|
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// only transfer something if the amount of data transferred |
237 |
|
|
// has a healthy relation to the header overhead |
238 |
|
|
if (chunk < 64) |
239 |
|
|
break; |
240 |
root |
1.46 |
|
241 |
root |
1.95 |
chunk = min (chunk, (int)ix.ofs); |
242 |
root |
1.46 |
|
243 |
root |
1.95 |
ix.ofs -= chunk; |
244 |
root |
1.46 |
|
245 |
root |
1.95 |
//fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
246 |
root |
1.59 |
|
247 |
root |
1.95 |
packet sl ("ix"); |
248 |
root |
1.46 |
|
249 |
root |
1.95 |
sl << ber32 (ix.idx) |
250 |
|
|
<< ber32 (ix.ofs) |
251 |
root |
1.96 |
<< data (ix.data + ix.ofs, chunk); |
252 |
root |
1.46 |
|
253 |
root |
1.95 |
send_packet (sl); |
254 |
root |
1.44 |
|
255 |
root |
1.65 |
if (!ix.ofs) |
256 |
|
|
{ |
257 |
root |
1.96 |
ix_pop (); |
258 |
root |
1.56 |
|
259 |
root |
1.65 |
if (ixface.empty ()) |
260 |
|
|
break; |
261 |
root |
1.54 |
} |
262 |
root |
1.44 |
} |
263 |
|
|
} |
264 |
root |
1.66 |
|
265 |
|
|
rate_avail -= outputbuffer_len (); |
266 |
|
|
} |
267 |
|
|
|
268 |
|
|
void |
269 |
root |
1.86 |
client::flush_sockets () |
270 |
root |
1.66 |
{ |
271 |
|
|
for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
272 |
|
|
(*i)->flush (); |
273 |
|
|
} |
274 |
|
|
|
275 |
|
|
void |
276 |
root |
1.86 |
client::clock () |
277 |
root |
1.66 |
{ |
278 |
|
|
for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
279 |
|
|
(*i)->tick (); |
280 |
|
|
|
281 |
|
|
// give them all the same chances |
282 |
|
|
flush_sockets (); |
283 |
|
|
|
284 |
|
|
//TODO: should not be done here, either |
285 |
|
|
for (unsigned i = 0; i < clients.size (); ++i) |
286 |
|
|
clients[i]->refcnt_chk (); |
287 |
elmex |
1.1 |
} |
288 |
root |
1.43 |
|