1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
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 it |
8 | it under the terms of the GNU General Public License as published by |
9 | * under the terms of the GNU General Public License as published by the Free |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | * Software Foundation; either version 2 of the License, or (at your option) |
10 | (at your option) any later version. |
11 | * 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, but |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
15 | GNU General Public License for more details. |
16 | * 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 along |
18 | along with this program; if not, write to the Free Software |
19 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | |
21 | * |
21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
22 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
23 | */ |
23 | |
24 | |
24 | /** |
25 | /** |
25 | * \file |
26 | * \file |
26 | * Socket general functions |
27 | * Socket general functions |
27 | * |
28 | * |
… | |
… | |
43 | #include <netdb.h> |
44 | #include <netdb.h> |
44 | |
45 | |
45 | #include <unistd.h> |
46 | #include <unistd.h> |
46 | #include <arpa/inet.h> |
47 | #include <arpa/inet.h> |
47 | |
48 | |
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49 | #include <algorithm> |
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50 | |
48 | sockvec clients; |
51 | sockvec clients; |
49 | |
52 | |
50 | /** |
53 | /** |
51 | * Initializes a connection. Really, it just sets up the data structure, |
54 | * Initializes a connection. Really, it just sets up the data structure, |
52 | * socket setup is handled elsewhere. We do send a version to the |
55 | * socket setup is handled elsewhere. We do send a version to the |
53 | * client. |
56 | * client. |
54 | */ |
57 | */ |
55 | client::client (int fd, const char *peername) |
58 | client::client (int fd, const char *peername) |
56 | : fd (fd), host (strdup (peername)), |
59 | : fd (fd), host (strdup (peername)), |
57 | socket_ev (this, &client::socket_cb), |
60 | socket_ev (this, &client::socket_cb), |
58 | cmd_ev (this, &client::cmd_cb), |
61 | cmd_ev (this, &client::cmd_cb) |
59 | cc_inv (this), cc_other (this) |
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60 | { |
62 | { |
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63 | refcnt_inc (); // the socket is an external reference |
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64 | |
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65 | mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
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66 | |
61 | { |
67 | { |
62 | struct linger linger_opt; |
68 | struct linger linger_opt; |
63 | |
69 | |
64 | linger_opt.l_onoff = 0; |
70 | linger_opt.l_onoff = 0; |
65 | linger_opt.l_linger = 0; |
71 | linger_opt.l_linger = 0; |
66 | |
72 | |
67 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
73 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
68 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
74 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
69 | } |
75 | } |
70 | |
76 | |
71 | { |
77 | { |
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78 | int val; |
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79 | |
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80 | #ifdef IP_TOS |
72 | int val = IPTOS_LOWDELAY; |
81 | val = IPTOS_LOWDELAY; |
73 | |
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74 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
82 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
75 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
83 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
76 | } |
84 | #endif |
77 | |
85 | |
78 | { |
86 | #ifdef TCP_NODELAY |
79 | int val = 1; |
87 | val = 1; |
80 | |
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81 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
88 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
82 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
89 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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90 | #endif |
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91 | |
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92 | // set some very aggressive keepalive parameters |
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93 | #ifdef TCP_KEEPIDLE |
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94 | val = 1; |
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95 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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96 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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97 | #endif |
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98 | |
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99 | #ifdef TCP_KEEPCNT |
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100 | val = 3; |
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101 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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102 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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103 | #endif |
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104 | |
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105 | #ifdef TCP_KEEPINTVL |
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106 | val = 1; |
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107 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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108 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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109 | #endif |
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110 | |
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111 | // try to find the mss value in use |
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112 | #ifdef TCP_MAXSEG |
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113 | socklen_t sl = sizeof (val); |
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114 | if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
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115 | mss = val; |
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116 | #endif |
83 | } |
117 | } |
84 | |
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85 | #ifdef __linux__ |
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86 | { |
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87 | int val; |
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88 | |
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89 | // set some very aggressive keepalive parameters |
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90 | val = 10; |
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91 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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92 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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93 | |
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94 | val = 5; |
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95 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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96 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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97 | |
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98 | val = 1; |
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99 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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100 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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101 | } |
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102 | #endif |
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103 | |
118 | |
104 | { |
119 | { |
105 | int bufsize = 65535; /*Supposed absolute upper limit */ |
120 | int bufsize = 65535; /*Supposed absolute upper limit */ |
106 | int oldbufsize; |
121 | int oldbufsize; |
107 | int buflen = sizeof (int); |
122 | int buflen = sizeof (int); |
… | |
… | |
124 | mapmode = Map0Cmd; |
139 | mapmode = Map0Cmd; |
125 | darkness = 1; |
140 | darkness = 1; |
126 | mapx = 11; |
141 | mapx = 11; |
127 | mapy = 11; |
142 | mapy = 11; |
128 | itemcmd = 1; /* Default is version item1 command */ |
143 | itemcmd = 1; /* Default is version item1 command */ |
129 | |
144 | max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
130 | faces_sent = salloc0<uint8> (nrofpixmaps); |
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131 | |
145 | |
132 | /* Do this so we don't send a face command for the client for |
146 | /* Do this so we don't send a face command for the client for |
133 | * this face. Face 0 is sent to the client to say clear |
147 | * this face. Face 0 is sent to the client to say clear |
134 | * face information. |
148 | * face information. |
135 | */ |
149 | */ |
136 | faces_sent[0] = NS_FACESENT_FACE; |
150 | faces_sent[0] = true; |
137 | |
151 | |
138 | // socket I/O is low priority |
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139 | // we prefer to have the server run instead of handling client requests |
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140 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
152 | socket_ev.prio (PE_PRIO_NORMAL); |
141 | socket_ev.fd (fd); |
153 | socket_ev.fd (fd); |
142 | socket_ev.poll (PE_R); |
154 | socket_ev.poll (PE_R); |
143 | |
155 | |
144 | // command handling is even lower priority |
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145 | // that way no client can monopolise the server |
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146 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
156 | cmd_ev.prio (PE_PRIO_NORMAL); |
147 | |
157 | |
148 | // initialisation done, kick it! |
158 | // initialisation done, kick it! |
149 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
159 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
150 | flush (); |
160 | flush (); |
151 | |
161 | |
152 | #if 0//TODO |
162 | reset_stats (); |
153 | socket_info.nconns++; |
163 | |
154 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
164 | clients.insert (this); |
155 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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156 | #endif |
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157 | } |
165 | } |
158 | |
166 | |
159 | client::~client () |
167 | client::~client () |
160 | { |
168 | { |
161 | if (pl) |
169 | clients.erase (this); |
162 | pl->ns = 0; |
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163 | |
170 | |
164 | if (fd >= 0) |
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165 | close (fd); |
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166 | |
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167 | sfree<uint8> (faces_sent, nrofpixmaps); |
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168 | free (stats.range); |
171 | free (stats.range); |
169 | free (stats.title); |
172 | free (stats.title); |
170 | free (host); |
173 | free (host); |
171 | } |
174 | } |
172 | |
175 | |
173 | void |
176 | void |
174 | client::destroy () |
177 | client::do_destroy () |
175 | { |
178 | { |
176 | INVOKE_CLIENT (DESTROY, this); |
179 | attachable::do_destroy (); |
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180 | |
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181 | if (pl) |
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182 | pl->disconnect (); |
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183 | |
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184 | if (fd >= 0) |
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185 | { |
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186 | send_packet ("goodbye"); |
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187 | flush (); |
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188 | |
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189 | close (fd); |
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190 | } |
177 | |
191 | |
178 | state = ST_DEAD; |
192 | state = ST_DEAD; |
179 | |
193 | |
180 | socket_ev.suspend (); |
194 | socket_ev.suspend (); |
181 | cmd_ev.suspend (); |
195 | cmd_ev.suspend (); |
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196 | |
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197 | refcnt_dec (); // socket no longer open |
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198 | } |
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199 | |
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200 | void |
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201 | client::reset_stats () |
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202 | { |
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203 | /* we need to clear these to -1 and not zero - otherwise, |
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204 | * if a player quits and starts a new character, we wont |
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205 | * send new values to the client, as things like exp start |
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206 | * at zero. |
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207 | */ |
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208 | for (int i = 0; i < NUM_SKILLS; i++) |
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209 | last_skill_exp[i] = -1; |
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210 | |
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211 | for (int i = 0; i < NROFATTACKS; i++) |
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212 | last_resist[i] = -1; |
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213 | |
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214 | last_weapon_sp = -1; |
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215 | last_level = -1; |
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216 | last_stats.exp = -1; |
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217 | last_weight = (uint32) - 1; |
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218 | last_flags = 0; |
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219 | last_weight = 0; |
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220 | last_weight_limit = 0; |
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221 | last_path_attuned = 0; |
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222 | last_path_repelled = 0; |
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223 | last_path_denied = 0; |
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224 | last_speed = 0; |
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225 | last_flags = 0; |
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226 | |
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227 | static living zero_living; |
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228 | last_stats = zero_living; |
182 | } |
229 | } |
183 | |
230 | |
184 | /** This sets up the socket and reads all the image information into memory. */ |
231 | /** This sets up the socket and reads all the image information into memory. */ |
185 | void |
232 | void |
186 | init_ericserver (void) |
233 | init_ericserver (void) |
187 | { |
234 | { |
188 | cst_tot.time_start = time (NULL); |
235 | cst_tot.time_start = time (NULL); |
189 | cst_lst.time_start = time (NULL); |
236 | cst_lst.time_start = time (NULL); |
190 | |
237 | |
191 | LOG (llevDebug, "Initialize new client/server data\n"); |
238 | LOG (llevDebug, "Initialize new client/server data\n"); |
192 | |
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193 | read_client_images (); |
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194 | } |
239 | } |
195 | |
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196 | |
240 | |
197 | /******************************************************************************* |
241 | /******************************************************************************* |
198 | * |
242 | * |
199 | * Start of functions dealing with freeing of the data. |
243 | * Start of functions dealing with freeing of the data. |
200 | * |
244 | * |
… | |
… | |
206 | { |
250 | { |
207 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
251 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
208 | free_socket_images (); |
252 | free_socket_images (); |
209 | } |
253 | } |
210 | |
254 | |
211 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
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212 | void |
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213 | final_free_player (player *pl) |
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214 | { |
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215 | free_player (pl); |
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216 | } |
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217 | |
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218 | client * |
255 | client * |
219 | client::create (int fd, const char *peername) |
256 | client::create (int fd, const char *peername) |
220 | { |
257 | { |
221 | if (checkbanned (NULL, peername)) |
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222 | { |
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223 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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224 | return 0; |
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225 | } |
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226 | else |
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227 | { |
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228 | client *ns = new client (dup (fd), peername); |
258 | client *ns = new client (dup (fd), peername); |
229 | clients.push_back (ns); |
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230 | |
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231 | ns->instantiate (); // effectively a nop right now |
259 | ns->instantiate (); // effectively a nop right now |
232 | |
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233 | INVOKE_CLIENT (CONNECT, ns); |
260 | INVOKE_CLIENT (CONNECT, ns); |
234 | |
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235 | return ns; |
261 | return ns; |
236 | } |
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237 | } |
262 | } |
238 | |
263 | |