1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 | |
3 | * |
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4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | Copyright (C) 2001 Mark Wedel |
5 | * Copyright (©) 2001,2007 Mark Wedel |
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 | * Crossfire TRT 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 | |
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21 | 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> |
22 | */ |
22 | */ |
23 | |
23 | |
24 | /** |
24 | /** |
25 | * \file |
25 | * \file |
26 | * Socket general functions |
26 | * Socket general functions |
27 | * |
27 | * |
… | |
… | |
30 | * Mainly deals with initialization and higher level socket |
30 | * Mainly deals with initialization and higher level socket |
31 | * maintenance (checking for lost connections and if data has arrived.) |
31 | * maintenance (checking for lost connections and if data has arrived.) |
32 | * The reading of data is handled in ericserver.c |
32 | * The reading of data is handled in ericserver.c |
33 | */ |
33 | */ |
34 | |
34 | |
35 | |
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36 | #include <global.h> |
35 | #include <global.h> |
37 | #include <sproto.h> |
36 | #include <sproto.h> |
38 | #include <sys/types.h> |
37 | #include <sys/types.h> |
39 | #include <sys/time.h> |
38 | #include <sys/time.h> |
40 | #include <sys/socket.h> |
39 | #include <sys/socket.h> |
… | |
… | |
44 | #include <netdb.h> |
43 | #include <netdb.h> |
45 | |
44 | |
46 | #include <unistd.h> |
45 | #include <unistd.h> |
47 | #include <arpa/inet.h> |
46 | #include <arpa/inet.h> |
48 | |
47 | |
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48 | #include <algorithm> |
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49 | |
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50 | // use relatively small values, as we do not expect to receive much, |
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51 | // and we do userspace write buffering |
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52 | // 8kb limits throughput to roughly 66kb/s |
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53 | #define SOCKET_RCVBUF 8192 |
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54 | #define SOCKET_SNDBUF 16384 |
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55 | |
49 | sockvec clients; |
56 | sockvec clients; |
50 | |
57 | |
51 | /** |
58 | /** |
52 | * Initializes a connection. Really, it just sets up the data structure, |
59 | * Initializes a connection. Really, it just sets up the data structure, |
53 | * socket setup is handled elsewhere. We do send a version to the |
60 | * socket setup is handled elsewhere. We do send a version to the |
54 | * client. |
61 | * client. |
55 | */ |
62 | */ |
56 | client::client (int fd, const char *peername) |
63 | client::client (int fd, const char *peername) |
57 | : fd (fd), host (strdup (peername)), |
64 | : fd (fd), host (strdup (peername)), |
58 | socket_ev (this, &client::socket_cb), |
65 | socket_ev (this, &client::socket_cb), |
59 | cmd_ev (this, &client::cmd_cb), |
66 | cmd_ev (this, &client::cmd_cb) |
60 | cc_inv (this), cc_other (this) |
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61 | { |
67 | { |
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68 | refcnt_inc (); // the socket is an external reference |
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69 | |
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70 | mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
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71 | |
62 | { |
72 | { |
63 | struct linger linger_opt; |
73 | struct linger linger_opt; |
64 | |
74 | |
65 | linger_opt.l_onoff = 0; |
75 | linger_opt.l_onoff = 0; |
66 | linger_opt.l_linger = 0; |
76 | linger_opt.l_linger = 0; |
67 | |
77 | |
68 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
78 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
69 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
79 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
70 | } |
80 | } |
71 | |
81 | |
72 | { |
82 | { |
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83 | int val; |
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84 | |
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85 | #ifdef SO_RCVBUF |
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86 | val = SOCKET_RCVBUF; |
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87 | if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val))) |
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88 | LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno)); |
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89 | #endif |
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90 | |
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91 | #ifdef SO_SNDBUF |
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92 | val = SOCKET_SNDBUF; |
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93 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val))) |
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94 | LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno)); |
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95 | #endif |
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96 | |
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97 | #ifdef IP_TOS |
73 | int val = IPTOS_LOWDELAY; |
98 | val = IPTOS_LOWDELAY; |
74 | |
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75 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
99 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
76 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
100 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
77 | } |
101 | #endif |
78 | |
102 | |
79 | { |
103 | #ifdef TCP_NODELAY |
80 | int val = 1; |
104 | val = 1; |
81 | |
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82 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
105 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
83 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
106 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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107 | #endif |
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108 | |
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109 | // set some very aggressive keepalive parameters |
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110 | #ifdef TCP_KEEPIDLE |
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111 | val = 1; |
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112 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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113 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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114 | #endif |
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115 | |
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116 | #ifdef TCP_KEEPCNT |
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117 | val = 3; |
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118 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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119 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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120 | #endif |
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121 | |
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122 | #ifdef TCP_KEEPINTVL |
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123 | val = 1; |
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124 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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125 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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126 | #endif |
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127 | |
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128 | // try to find the mss value in use |
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129 | #ifdef TCP_MAXSEG |
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130 | socklen_t sl = sizeof (val); |
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131 | if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
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132 | mss = val; |
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133 | #endif |
84 | } |
134 | } |
85 | |
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86 | #ifdef __linux__ |
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87 | { |
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88 | int val; |
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89 | |
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90 | // set some very aggressive keepalive parameters |
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91 | val = 10; |
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92 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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93 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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94 | |
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95 | val = 5; |
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96 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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97 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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98 | |
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99 | val = 1; |
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100 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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101 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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102 | } |
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103 | #endif |
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104 | |
135 | |
105 | { |
136 | { |
106 | int bufsize = 65535; /*Supposed absolute upper limit */ |
137 | int bufsize = 65535; /*Supposed absolute upper limit */ |
107 | int oldbufsize; |
138 | int oldbufsize; |
108 | int buflen = sizeof (int); |
139 | int buflen = sizeof (int); |
… | |
… | |
119 | |
150 | |
120 | buflen = sizeof (oldbufsize); |
151 | buflen = sizeof (oldbufsize); |
121 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
152 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
122 | } |
153 | } |
123 | |
154 | |
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155 | state = ST_SETUP; |
124 | mapmode = Map0Cmd; |
156 | mapmode = Map0Cmd; |
125 | darkness = 1; |
157 | darkness = 1; |
126 | status = Ns_Add; |
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127 | mapx = 11; |
158 | mapx = 11; |
128 | mapy = 11; |
159 | mapy = 11; |
129 | itemcmd = 1; /* Default is version item1 command */ |
160 | itemcmd = 1; /* Default is version item1 command */ |
130 | |
161 | max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
131 | faces_sent = salloc<uint8> (nrofpixmaps, 0); |
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132 | |
162 | |
133 | /* Do this so we don't send a face command for the client for |
163 | /* Do this so we don't send a face command for the client for |
134 | * this face. Face 0 is sent to the client to say clear |
164 | * this face. Face 0 is sent to the client to say clear |
135 | * face information. |
165 | * face information. |
136 | */ |
166 | */ |
137 | faces_sent[0] = NS_FACESENT_FACE; |
167 | faces_sent[0] = true; |
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168 | fx_want [FT_FACE] = true; // all clients must support image faces |
138 | |
169 | |
139 | // socket I/O is low priority |
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140 | // we prefer to have the server run instead of handling client requests |
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141 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
170 | socket_ev.prio (PE_PRIO_NORMAL); |
142 | socket_ev.fd (fd); |
171 | socket_ev.fd (fd); |
143 | socket_ev.poll (PE_R); |
172 | socket_ev.poll (PE_R); |
144 | |
173 | |
145 | // command handling is even lower priority |
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146 | // that way no client can monopolise the server |
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147 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
174 | cmd_ev.prio (PE_PRIO_NORMAL); |
148 | |
175 | |
149 | // initialisation done, kick it! |
176 | // initialisation done, kick it! |
150 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
177 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
151 | flush (); |
178 | flush (); |
152 | |
179 | |
153 | #if 0//TODO |
180 | reset_stats (); |
154 | socket_info.nconns++; |
181 | |
155 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
182 | clients.insert (this); |
156 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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157 | #endif |
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158 | } |
183 | } |
159 | |
184 | |
160 | client::~client () |
185 | client::~client () |
161 | { |
186 | { |
162 | if (pl) |
187 | clients.erase (this); |
163 | pl->socket = 0; |
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164 | |
188 | |
165 | if (fd >= 0) |
189 | mapinfo_queue_clear (); |
166 | close (fd); |
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167 | |
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168 | sfree<uint8> (faces_sent, nrofpixmaps); |
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169 | free (stats.range); |
190 | free (stats.range); |
170 | free (stats.title); |
191 | free (stats.title); |
171 | free (host); |
192 | free (host); |
172 | } |
193 | } |
173 | |
194 | |
174 | void |
195 | void |
175 | client::destroy () |
196 | client::do_destroy () |
176 | { |
197 | { |
177 | status = Ns_Dead; |
198 | attachable::do_destroy (); |
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199 | |
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200 | if (pl) |
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201 | pl->disconnect (); |
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202 | |
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203 | if (fd >= 0) |
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204 | { |
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205 | send_packet ("goodbye"); |
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206 | flush (); |
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207 | |
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208 | close (fd); |
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209 | } |
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210 | |
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211 | state = ST_DEAD; |
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212 | |
178 | socket_ev.suspend (); |
213 | socket_ev.suspend (); |
179 | cmd_ev.suspend (); |
214 | cmd_ev.suspend (); |
180 | } |
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181 | |
215 | |
182 | /** This sets up the socket and reads all the image information into memory. */ |
216 | refcnt_dec (); // socket no longer open |
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217 | } |
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218 | |
183 | void |
219 | void |
184 | init_ericserver (void) |
220 | client::reset_stats () |
185 | { |
221 | { |
186 | cst_tot.time_start = time (NULL); |
222 | /* we need to clear these to -1 and not zero - otherwise, |
187 | cst_lst.time_start = time (NULL); |
223 | * if a player quits and starts a new character, we wont |
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224 | * send new values to the client, as things like exp start |
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225 | * at zero. |
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226 | */ |
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227 | for (int i = 0; i < NUM_SKILLS; i++) |
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228 | last_skill_exp[i] = -1; |
188 | |
229 | |
189 | LOG (llevDebug, "Initialize new client/server data\n"); |
230 | for (int i = 0; i < NROFATTACKS; i++) |
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231 | last_resist[i] = -1; |
190 | |
232 | |
191 | read_client_images (); |
233 | last_weapon_sp = -1; |
192 | } |
234 | last_level = -1; |
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235 | last_stats.exp = -1; |
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236 | last_weight = (uint32) - 1; |
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237 | last_flags = 0; |
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238 | last_weight = 0; |
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239 | last_weight_limit = 0; |
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240 | last_path_attuned = 0; |
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241 | last_path_repelled = 0; |
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242 | last_path_denied = 0; |
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243 | last_speed = 0; |
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244 | last_flags = 0; |
193 | |
245 | |
194 | |
246 | static living zero_living; |
195 | /******************************************************************************* |
247 | last_stats = zero_living; |
196 | * |
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197 | * Start of functions dealing with freeing of the data. |
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198 | * |
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199 | ******************************************************************************/ |
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200 | |
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201 | /** Free's all the memory that ericserver allocates. */ |
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202 | void |
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203 | free_all_newserver (void) |
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204 | { |
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205 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
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206 | free_socket_images (); |
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207 | } |
248 | } |
208 | |
249 | |
209 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
250 | client * |
210 | void |
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211 | final_free_player (player *pl) |
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212 | { |
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213 | free_player (pl); |
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214 | } |
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215 | |
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216 | bool |
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217 | add_client (int fd, const char *peername) |
251 | client::create (int fd, const char *peername) |
218 | { |
252 | { |
219 | if (checkbanned (NULL, peername)) |
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220 | { |
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221 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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222 | return false; |
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223 | } |
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224 | else |
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225 | { |
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226 | client *ns = new client (dup (fd), peername); |
253 | client *ns = new client (dup (fd), peername); |
227 | clients.push_back (ns); |
254 | ns->instantiate (); // effectively a nop right now |
228 | return true; |
255 | INVOKE_CLIENT (CONNECT, ns); |
229 | } |
256 | return ns; |
230 | } |
257 | } |
231 | |
258 | |