1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | |
3 | * |
|
|
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra 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 | * Deliantra 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 authors can be reached via e-mail to <support@deliantra.net> |
21 | The author 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 | |
|
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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 |
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50 | |
51 | #define MAX_QUEUE_DEPTH 500 //TODO |
51 | #define MAX_QUEUE_DEPTH 50 |
52 | #define MAX_QUEUE_BACKLOG 5. //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. |
53 | |
56 | |
54 | void |
57 | void |
55 | client::reset_state () |
58 | client::reset_state () |
56 | { |
59 | { |
57 | if (!pl) |
60 | if (!pl) |
… | |
… | |
62 | } |
65 | } |
63 | |
66 | |
64 | void |
67 | void |
65 | client::queue_command (packet_type *handler, char *data, int datalen) |
68 | client::queue_command (packet_type *handler, char *data, int datalen) |
66 | { |
69 | { |
67 | tstamp stamp = now (); |
70 | tstamp stamp = NOW; |
68 | |
71 | |
69 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
72 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
70 | { |
73 | { |
71 | //TODO: just disconnect here? |
74 | //TODO: just disconnect here? |
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 if (!cmd_queue.empty () && cmd_queue.front ().stamp + MAX_QUEUE_BACKLOG < stamp) |
|
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76 | { |
|
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77 | reset_state (); |
|
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78 | send_packet_printf ("drawinfo %d too many commands in queue, ignoring.", NDI_RED); |
|
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79 | } |
|
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80 | else |
78 | else |
|
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79 | { |
81 | cmd_queue.push_back (command ( |
80 | cmd_queue.push_back (command ()); |
82 | stamp, handler, (char *)salloc (datalen + 1, data), datalen |
81 | command &cmd = cmd_queue.back (); |
83 | )); |
82 | cmd.stamp = stamp; |
|
|
83 | cmd.handler = handler; |
|
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84 | cmd.data = salloc<char> (datalen + 1, data); |
|
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85 | cmd.datalen = datalen; |
|
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86 | } |
84 | } |
87 | } |
85 | |
88 | |
86 | bool |
89 | bool |
87 | client::handle_command () |
90 | client::handle_command () |
88 | { |
91 | { |
89 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
|
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90 | return false; |
|
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91 | |
|
|
92 | if (cmd_queue.empty ()) |
92 | if (!cmd_queue.empty () |
93 | return false; |
93 | && state == ST_PLAYING |
94 | |
94 | && pl->ob->speed_left > 0.f) |
|
|
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 | { |
|
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99 | reset_state (); |
|
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100 | send_packet_printf ("drawinfo %d ignoring delayed command.", NDI_RED); |
|
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101 | } |
|
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102 | else |
|
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103 | execute (cmd.handler, cmd.data, cmd.datalen); |
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104 | |
|
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105 | sfree (cmd.data, cmd.datalen); |
|
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106 | cmd_queue.pop_front (); |
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107 | |
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108 | return true; |
|
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109 | } |
|
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110 | |
|
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111 | void |
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112 | flush_sockets (void) |
|
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113 | { |
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114 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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115 | if ((*i)->status != Ns_Dead) |
|
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116 | (*i)->flush (); |
|
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117 | } |
|
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118 | |
|
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119 | /** |
|
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120 | * This checks the sockets for input, does the right thing. |
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121 | * |
|
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122 | * A bit of this code is grabbed out of socket.c |
|
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123 | * There are 2 lists we need to look through - init_sockets is a list |
|
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124 | * |
|
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125 | */ |
|
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126 | void |
|
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127 | doeric_server (void) |
|
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128 | { |
|
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129 | #ifdef CS_LOGSTATS |
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130 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
|
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131 | write_cs_stats (); |
|
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132 | #endif |
|
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133 | |
|
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134 | /* Go through the players. Let the loop set the next pl value, |
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135 | * since we may remove some |
|
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136 | */ |
|
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137 | //TODO: must be handled cleanly elsewhere |
|
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138 | for (player *pl = first_player; pl; ) |
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139 | { |
|
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140 | player *npl = pl->next; |
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141 | |
|
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142 | //TODO: must be handled cleanly elsewhere |
|
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143 | if (!pl->socket || pl->socket->status == Ns_Dead) |
|
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144 | { |
99 | { |
145 | save_player (pl->ob, 0); |
100 | reset_state (); |
146 | |
101 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
147 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
|
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148 | { |
|
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149 | terminate_all_pets (pl->ob); |
|
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150 | pl->ob->remove (); |
|
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151 | } |
|
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152 | |
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153 | leave (pl, 1); |
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154 | final_free_player (pl); |
|
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155 | } |
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156 | |
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157 | pl = npl; |
|
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158 | } |
|
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159 | |
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160 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ) |
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161 | { |
|
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162 | client *s = *i; |
|
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163 | |
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164 | if (s->status == Ns_Dead) |
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165 | { |
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166 | clients.erase (i); |
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167 | delete s; |
|
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168 | } |
102 | } |
169 | else |
103 | else |
170 | ++i; |
104 | execute (cmd.handler, cmd.data, cmd.datalen); |
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105 | |
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106 | cmd_queue.pop_front (); |
|
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107 | return true; |
|
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108 | } |
|
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109 | else |
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110 | return false; |
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111 | } |
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112 | |
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113 | void |
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114 | client::tick () |
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115 | { |
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116 | if (!pl || destroyed ()) |
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117 | return; |
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118 | |
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119 | /* Update the players stats once per tick. More efficient than |
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120 | * sending them whenever they change, and probably just as useful |
|
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121 | */ |
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122 | esrv_update_stats (pl); |
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123 | |
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124 | if (last_weight != -1 && last_weight != WEIGHT (pl->ob)) |
171 | } |
125 | { |
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126 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
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127 | if (last_weight != WEIGHT (pl->ob)) |
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128 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
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129 | (unsigned long) last_weight, WEIGHT (pl->ob)); |
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130 | } |
172 | |
131 | |
173 | /* We need to do some of the processing below regardless */ |
132 | draw_client_map (pl); |
174 | |
133 | |
175 | /* Check for any input on the sockets */ |
134 | if (update_look) |
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135 | esrv_draw_look (pl); |
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136 | |
|
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137 | mapinfo_queue_run (); |
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138 | |
|
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139 | #if HAVE_TCP_INFO |
|
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140 | // check time of last ack, and, if too old, kill connection |
|
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141 | socklen_t len = sizeof (tcpi); |
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142 | |
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143 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
|
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144 | { |
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145 | if (tcpi.tcpi_snd_mss) |
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146 | mss = tcpi.tcpi_snd_mss; |
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147 | |
|
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148 | #if 0 |
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149 | 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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150 | tcpi.tcpi_unacked, |
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151 | tcpi.tcpi_sacked, |
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152 | tcpi.tcpi_lost, |
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153 | tcpi.tcpi_retrans, |
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154 | tcpi.tcpi_fackets, |
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155 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
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156 | |
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157 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
|
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158 | #endif |
|
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159 | |
|
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160 | // fast-time-out a player by checking for missign acks |
|
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161 | // do this only when player is active |
|
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162 | if (pl && pl->active |
|
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163 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
|
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164 | { |
|
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165 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
|
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166 | write_outputbuffer (); |
|
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167 | |
|
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168 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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169 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
|
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170 | destroy (); |
|
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171 | } |
|
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172 | } |
|
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173 | #endif |
|
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174 | |
|
|
175 | rate_avail = min (max_rate + mss, rate_avail + max_rate); |
|
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176 | |
|
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177 | int max_send = rate_avail; |
|
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178 | |
|
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179 | #if HAVE_TCP_INFO |
|
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180 | // further restrict the available bandwidth by the excess bandwidth available |
|
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181 | max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
|
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182 | #endif |
|
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183 | |
|
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184 | // if we can split images, round to next-lowest mss |
|
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185 | if (fxix) max_send -= max_send % mss; |
|
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186 | |
|
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187 | if (ixface.empty ()) |
|
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188 | { |
|
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189 | // regularly send a new face when queue is empty |
|
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190 | if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
|
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191 | while (scrub_idx < faces.size () - 1) |
|
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192 | { |
|
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193 | ++scrub_idx; |
|
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194 | |
|
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195 | if (!faces_sent [scrub_idx]) |
|
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196 | if (faceinfo *f = face_info (scrub_idx)) |
|
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197 | if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now |
|
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198 | { |
|
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199 | send_face (scrub_idx, -120); |
|
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200 | flush_fx (); |
|
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201 | |
|
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202 | bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
|
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203 | break; |
|
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204 | } |
|
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205 | } |
|
|
206 | } |
|
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207 | else |
|
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208 | { |
|
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209 | bg_scrub = BG_SCRUB_RATE; |
|
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210 | |
|
|
211 | for (;;) |
|
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212 | { |
|
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213 | int avail = max_send - outputbuffer_len (); |
|
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214 | |
|
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215 | if (avail <= 0) |
|
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216 | break; |
|
|
217 | |
|
|
218 | ixsend &ix = ixface.back (); |
|
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219 | |
|
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220 | if (facedata *d = face_data (ix.idx, faceset)) |
|
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221 | { |
|
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222 | if (fxix) |
|
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223 | { |
|
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224 | // estimate the packet header overhead "ix " + idx + (new)ofs |
|
|
225 | int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
|
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226 | int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
|
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227 | |
|
|
228 | // only transfer something if the amount of data transferred |
|
|
229 | // has a healthy relation to the header overhead |
|
|
230 | if (chunk < 64) |
|
|
231 | break; |
|
|
232 | |
|
|
233 | chunk = min (chunk, (int)ix.ofs); |
|
|
234 | |
|
|
235 | ix.ofs -= chunk; |
|
|
236 | |
|
|
237 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
|
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238 | |
|
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239 | packet sl ("ix"); |
|
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240 | |
|
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241 | sl << ber32 (ix.idx) |
|
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242 | << ber32 (ix.ofs) |
|
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243 | << data (d->data.data () + ix.ofs, chunk); |
|
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244 | |
|
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245 | send_packet (sl); |
|
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246 | } |
|
|
247 | else |
|
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248 | { |
|
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249 | send_image (ix.idx); |
|
|
250 | ix.ofs = 0; |
|
|
251 | } |
|
|
252 | } |
|
|
253 | else |
|
|
254 | ix.ofs = 0; |
|
|
255 | |
|
|
256 | if (!ix.ofs) |
|
|
257 | { |
|
|
258 | ixface.pop_back (); |
|
|
259 | |
|
|
260 | if (ixface.empty ()) |
|
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261 | break; |
|
|
262 | } |
|
|
263 | } |
|
|
264 | } |
|
|
265 | |
|
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266 | rate_avail -= outputbuffer_len (); |
|
|
267 | } |
|
|
268 | |
|
|
269 | void |
|
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270 | client::flush_sockets (void) |
|
|
271 | { |
176 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
272 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
177 | { |
273 | (*i)->flush (); |
178 | client *s = *i; |
274 | } |
179 | player *pl = s->pl; |
|
|
180 | |
275 | |
181 | s->handle_packet (); |
276 | void |
182 | s->handle_command (); |
277 | client::clock (void) |
|
|
278 | { |
|
|
279 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
|
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280 | (*i)->tick (); |
183 | |
281 | |
|
|
282 | // give them all the same chances |
|
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283 | flush_sockets (); |
|
|
284 | |
184 | //TODO: should not be done here, either |
285 | //TODO: should not be done here, either |
185 | if (s->status != Ns_Dead && pl) |
286 | for (unsigned i = 0; i < clients.size (); ++i) |
186 | { |
287 | clients[i]->refcnt_chk (); |
187 | /* Update the players stats once per tick. More efficient than |
|
|
188 | * sending them whenever they change, and probably just as useful |
|
|
189 | */ |
|
|
190 | esrv_update_stats (pl); |
|
|
191 | |
|
|
192 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
|
|
193 | { |
|
|
194 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
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195 | if (pl->last_weight != WEIGHT (pl->ob)) |
|
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196 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
|
|
197 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
|
|
198 | } |
|
|
199 | |
|
|
200 | draw_client_map (pl->ob); |
|
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201 | |
|
|
202 | if (s->update_look) |
|
|
203 | esrv_draw_look (pl->ob); |
|
|
204 | } |
|
|
205 | } |
|
|
206 | } |
288 | } |
207 | |
289 | |