1 |
elmex |
1.1 |
/* |
2 |
root |
1.70 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 |
pippijn |
1.39 |
* |
4 |
root |
1.70 |
* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 |
root |
1.49 |
* Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team |
6 |
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* Copyright (©) 1992,2007 Frank Tore Johansen |
7 |
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* |
8 |
root |
1.70 |
* Deliantra is free software: you can redistribute it and/or modify |
9 |
root |
1.55 |
* it under the terms of the GNU General Public License as published by |
10 |
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* the Free Software Foundation, either version 3 of the License, or |
11 |
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* (at your option) any later version. |
12 |
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* |
13 |
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* This program is distributed in the hope that it will be useful, |
14 |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 |
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* GNU General Public License for more details. |
17 |
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* |
18 |
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* You should have received a copy of the GNU General Public License |
19 |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
20 |
root |
1.49 |
* |
21 |
root |
1.70 |
* The authors can be reached via e-mail to <support@deliantra.net> |
22 |
pippijn |
1.39 |
*/ |
23 |
elmex |
1.1 |
|
24 |
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/** |
25 |
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* \file |
26 |
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* Main client/server loops. |
27 |
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* |
28 |
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* \date 2003-12-02 |
29 |
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* |
30 |
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* loop.c mainly deals with initialization and higher level socket |
31 |
root |
1.26 |
* maintanance (checking for lost connections and if data has arrived.) |
32 |
elmex |
1.1 |
*/ |
33 |
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34 |
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#include <global.h> |
35 |
root |
1.10 |
#include <sproto.h> |
36 |
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#include <sockproto.h> |
37 |
elmex |
1.1 |
|
38 |
pippijn |
1.8 |
#include <sys/types.h> |
39 |
|
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#include <sys/time.h> |
40 |
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#include <sys/socket.h> |
41 |
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#include <netinet/in.h> |
42 |
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#include <netdb.h> |
43 |
elmex |
1.1 |
|
44 |
root |
1.16 |
#include <unistd.h> |
45 |
|
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#include <arpa/inet.h> |
46 |
elmex |
1.1 |
|
47 |
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#include <loader.h> |
48 |
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|
49 |
root |
1.51 |
#define BG_SCRUB_RATE 4 // how often to send a face in the background |
50 |
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|
51 |
root |
1.65 |
#define MAX_QUEUE_DEPTH 50 |
52 |
root |
1.51 |
#define MAX_QUEUE_BACKLOG 3. |
53 |
elmex |
1.1 |
|
54 |
root |
1.66 |
// disconnect a socket after this many seconds without an ack |
55 |
root |
1.72 |
#define SOCKET_TIMEOUT 16. |
56 |
root |
1.66 |
|
57 |
root |
1.21 |
void |
58 |
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client::reset_state () |
59 |
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{ |
60 |
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if (!pl) |
61 |
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return; |
62 |
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63 |
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pl->run_on = 0; |
64 |
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pl->fire_on = 0; |
65 |
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} |
66 |
elmex |
1.1 |
|
67 |
root |
1.20 |
void |
68 |
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client::queue_command (packet_type *handler, char *data, int datalen) |
69 |
root |
1.6 |
{ |
70 |
root |
1.51 |
tstamp stamp = NOW; |
71 |
elmex |
1.1 |
|
72 |
root |
1.20 |
if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
73 |
root |
1.21 |
{ |
74 |
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//TODO: just disconnect here? |
75 |
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reset_state (); |
76 |
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send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
77 |
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} |
78 |
root |
1.20 |
else |
79 |
root |
1.24 |
{ |
80 |
root |
1.71 |
cmd_queue.resize (cmd_queue.size () + 1); |
81 |
root |
1.24 |
command &cmd = cmd_queue.back (); |
82 |
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cmd.stamp = stamp; |
83 |
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cmd.handler = handler; |
84 |
root |
1.25 |
cmd.data = salloc<char> (datalen + 1, data); |
85 |
root |
1.24 |
cmd.datalen = datalen; |
86 |
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} |
87 |
root |
1.20 |
} |
88 |
elmex |
1.1 |
|
89 |
root |
1.20 |
bool |
90 |
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client::handle_command () |
91 |
elmex |
1.1 |
{ |
92 |
root |
1.48 |
if (!cmd_queue.empty () |
93 |
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&& state == ST_PLAYING |
94 |
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&& pl->ob->speed_left > 0.f) |
95 |
root |
1.26 |
{ |
96 |
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command &cmd = cmd_queue.front (); |
97 |
root |
1.6 |
|
98 |
root |
1.51 |
if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
99 |
root |
1.26 |
{ |
100 |
root |
1.48 |
reset_state (); |
101 |
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send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
102 |
root |
1.26 |
} |
103 |
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else |
104 |
root |
1.48 |
execute (cmd.handler, cmd.data, cmd.datalen); |
105 |
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|
106 |
root |
1.71 |
sfree<char> (cmd.data, cmd.datalen + 1); |
107 |
root |
1.48 |
cmd_queue.pop_front (); |
108 |
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return true; |
109 |
root |
1.21 |
} |
110 |
root |
1.48 |
else |
111 |
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return false; |
112 |
elmex |
1.1 |
} |
113 |
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|
114 |
root |
1.6 |
void |
115 |
root |
1.42 |
client::tick () |
116 |
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{ |
117 |
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if (!pl || destroyed ()) |
118 |
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return; |
119 |
root |
1.37 |
|
120 |
root |
1.42 |
/* Update the players stats once per tick. More efficient than |
121 |
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* sending them whenever they change, and probably just as useful |
122 |
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*/ |
123 |
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esrv_update_stats (pl); |
124 |
root |
1.20 |
|
125 |
root |
1.42 |
if (last_weight != -1 && last_weight != WEIGHT (pl->ob)) |
126 |
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{ |
127 |
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esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
128 |
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if (last_weight != WEIGHT (pl->ob)) |
129 |
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LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
130 |
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(unsigned long) last_weight, WEIGHT (pl->ob)); |
131 |
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} |
132 |
root |
1.6 |
|
133 |
root |
1.50 |
draw_client_map (pl); |
134 |
root |
1.20 |
|
135 |
root |
1.42 |
if (update_look) |
136 |
root |
1.50 |
esrv_draw_look (pl); |
137 |
root |
1.41 |
|
138 |
root |
1.69 |
mapinfo_queue_run (); |
139 |
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|
140 |
root |
1.66 |
#if HAVE_TCP_INFO |
141 |
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// check time of last ack, and, if too old, kill connection |
142 |
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socklen_t len = sizeof (tcpi); |
143 |
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|
144 |
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if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
145 |
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{ |
146 |
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if (tcpi.tcpi_snd_mss) |
147 |
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mss = tcpi.tcpi_snd_mss; |
148 |
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|
149 |
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#if 0 |
150 |
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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", |
151 |
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tcpi.tcpi_unacked, |
152 |
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tcpi.tcpi_sacked, |
153 |
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tcpi.tcpi_lost, |
154 |
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tcpi.tcpi_retrans, |
155 |
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tcpi.tcpi_fackets, |
156 |
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tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
157 |
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|
158 |
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tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
159 |
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#endif |
160 |
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|
161 |
root |
1.68 |
// fast-time-out a player by checking for missign acks |
162 |
root |
1.66 |
// do this only when player is active |
163 |
|
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if (pl && pl->active |
164 |
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&& tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
165 |
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{ |
166 |
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send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
167 |
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write_outputbuffer (); |
168 |
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|
169 |
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LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
170 |
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(unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
171 |
|
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destroy (); |
172 |
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} |
173 |
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} |
174 |
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#endif |
175 |
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176 |
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rate_avail = min (max_rate + mss, rate_avail + max_rate); |
177 |
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|
178 |
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int max_send = rate_avail; |
179 |
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|
180 |
|
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#if HAVE_TCP_INFO |
181 |
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// further restrict the available bandwidth by the excess bandwidth available |
182 |
|
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max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
183 |
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#endif |
184 |
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|
185 |
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// if we can split images, round to next-lowest mss |
186 |
|
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if (fxix) max_send -= max_send % mss; |
187 |
|
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|
188 |
root |
1.65 |
if (ixface.empty ()) |
189 |
|
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{ |
190 |
|
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// regularly send a new face when queue is empty |
191 |
|
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if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
192 |
|
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while (scrub_idx < faces.size () - 1) |
193 |
|
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{ |
194 |
|
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++scrub_idx; |
195 |
|
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|
196 |
|
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if (!faces_sent [scrub_idx]) |
197 |
|
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if (faceinfo *f = face_info (scrub_idx)) |
198 |
root |
1.67 |
if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now |
199 |
root |
1.65 |
{ |
200 |
|
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send_face (scrub_idx, -120); |
201 |
|
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flush_fx (); |
202 |
|
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|
203 |
root |
1.66 |
bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
204 |
root |
1.65 |
break; |
205 |
|
|
} |
206 |
|
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} |
207 |
|
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} |
208 |
|
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else |
209 |
|
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{ |
210 |
root |
1.66 |
bg_scrub = BG_SCRUB_RATE; |
211 |
root |
1.65 |
|
212 |
root |
1.66 |
for (;;) |
213 |
|
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{ |
214 |
|
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int avail = max_send - outputbuffer_len (); |
215 |
root |
1.64 |
|
216 |
root |
1.66 |
if (avail <= 0) |
217 |
|
|
break; |
218 |
root |
1.65 |
|
219 |
|
|
ixsend &ix = ixface.back (); |
220 |
root |
1.44 |
|
221 |
root |
1.65 |
if (facedata *d = face_data (ix.idx, faceset)) |
222 |
|
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{ |
223 |
|
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if (fxix) |
224 |
|
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{ |
225 |
|
|
// estimate the packet header overhead "ix " + idx + (new)ofs |
226 |
|
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int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
227 |
|
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int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
228 |
|
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|
229 |
|
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// only transfer something if the amount of data transferred |
230 |
|
|
// has a healthy relation to the header overhead |
231 |
|
|
if (chunk < 64) |
232 |
|
|
break; |
233 |
root |
1.46 |
|
234 |
root |
1.65 |
chunk = min (chunk, (int)ix.ofs); |
235 |
root |
1.46 |
|
236 |
root |
1.65 |
ix.ofs -= chunk; |
237 |
root |
1.46 |
|
238 |
root |
1.65 |
//fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
239 |
root |
1.59 |
|
240 |
root |
1.65 |
packet sl ("ix"); |
241 |
root |
1.46 |
|
242 |
root |
1.65 |
sl << ber32 (ix.idx) |
243 |
|
|
<< ber32 (ix.ofs) |
244 |
|
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<< data (d->data.data () + ix.ofs, chunk); |
245 |
root |
1.46 |
|
246 |
root |
1.65 |
send_packet (sl); |
247 |
|
|
} |
248 |
|
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else |
249 |
root |
1.63 |
{ |
250 |
root |
1.65 |
send_image (ix.idx); |
251 |
|
|
ix.ofs = 0; |
252 |
root |
1.46 |
} |
253 |
root |
1.65 |
} |
254 |
|
|
else |
255 |
|
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ix.ofs = 0; |
256 |
root |
1.44 |
|
257 |
root |
1.65 |
if (!ix.ofs) |
258 |
|
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{ |
259 |
|
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ixface.pop_back (); |
260 |
root |
1.56 |
|
261 |
root |
1.65 |
if (ixface.empty ()) |
262 |
|
|
break; |
263 |
root |
1.54 |
} |
264 |
root |
1.44 |
} |
265 |
|
|
} |
266 |
root |
1.66 |
|
267 |
|
|
rate_avail -= outputbuffer_len (); |
268 |
|
|
} |
269 |
|
|
|
270 |
|
|
void |
271 |
|
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client::flush_sockets (void) |
272 |
|
|
{ |
273 |
|
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for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
274 |
|
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(*i)->flush (); |
275 |
|
|
} |
276 |
|
|
|
277 |
|
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void |
278 |
|
|
client::clock (void) |
279 |
|
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{ |
280 |
|
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for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
281 |
|
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(*i)->tick (); |
282 |
|
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|
283 |
|
|
// give them all the same chances |
284 |
|
|
flush_sockets (); |
285 |
|
|
|
286 |
|
|
//TODO: should not be done here, either |
287 |
|
|
for (unsigned i = 0; i < clients.size (); ++i) |
288 |
|
|
clients[i]->refcnt_chk (); |
289 |
elmex |
1.1 |
} |
290 |
root |
1.43 |
|