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 | * |
… | |
… | |
45 | #include <unistd.h> |
45 | #include <unistd.h> |
46 | #include <arpa/inet.h> |
46 | #include <arpa/inet.h> |
47 | |
47 | |
48 | #include <algorithm> |
48 | #include <algorithm> |
49 | |
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 | |
50 | sockvec clients; |
56 | sockvec clients; |
51 | |
57 | |
52 | /** |
58 | /** |
53 | * Initializes a connection. Really, it just sets up the data structure, |
59 | * Initializes a connection. Really, it just sets up the data structure, |
54 | * 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 |
55 | * client. |
61 | * client. |
56 | */ |
62 | */ |
57 | client::client (int fd, const char *peername) |
63 | client::client (int fd, const char *peername) |
58 | : fd (fd), host (strdup (peername)), |
64 | : fd (fd), host (strdup (peername)), |
59 | socket_ev (this, &client::socket_cb), |
65 | socket_ev (this, &client::socket_cb), |
60 | cmd_ev (this, &client::cmd_cb), |
66 | cmd_ev (this, &client::cmd_cb) |
61 | cc_inv (this), cc_other (this) |
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62 | { |
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 | |
63 | { |
72 | { |
64 | struct linger linger_opt; |
73 | struct linger linger_opt; |
65 | |
74 | |
66 | linger_opt.l_onoff = 0; |
75 | linger_opt.l_onoff = 0; |
67 | linger_opt.l_linger = 0; |
76 | linger_opt.l_linger = 0; |
68 | |
77 | |
69 | 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))) |
70 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
79 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
71 | } |
80 | } |
72 | |
81 | |
73 | { |
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 |
74 | int val = IPTOS_LOWDELAY; |
98 | val = IPTOS_LOWDELAY; |
75 | |
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76 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
99 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
77 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
100 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
78 | } |
101 | #endif |
79 | |
102 | |
80 | { |
103 | #ifdef TCP_NODELAY |
81 | int val = 1; |
104 | val = 1; |
82 | |
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83 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
105 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
84 | 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 |
85 | } |
134 | } |
86 | |
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87 | #ifdef __linux__ |
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88 | { |
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89 | int val; |
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90 | |
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91 | // set some very aggressive keepalive parameters |
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92 | val = 10; |
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93 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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94 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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95 | |
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96 | val = 5; |
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97 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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98 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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99 | |
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100 | val = 1; |
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101 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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102 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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103 | } |
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104 | #endif |
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105 | |
135 | |
106 | { |
136 | { |
107 | int bufsize = 65535; /*Supposed absolute upper limit */ |
137 | int bufsize = 65535; /*Supposed absolute upper limit */ |
108 | int oldbufsize; |
138 | int oldbufsize; |
109 | int buflen = sizeof (int); |
139 | int buflen = sizeof (int); |
… | |
… | |
126 | mapmode = Map0Cmd; |
156 | mapmode = Map0Cmd; |
127 | darkness = 1; |
157 | darkness = 1; |
128 | mapx = 11; |
158 | mapx = 11; |
129 | mapy = 11; |
159 | mapy = 11; |
130 | itemcmd = 1; /* Default is version item1 command */ |
160 | itemcmd = 1; /* Default is version item1 command */ |
131 | |
161 | max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
132 | faces_sent = salloc0<uint8> (nrofpixmaps); |
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133 | |
162 | |
134 | /* 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 |
135 | * 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 |
136 | * face information. |
165 | * face information. |
137 | */ |
166 | */ |
138 | 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 |
139 | |
169 | |
140 | // socket I/O is low priority |
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141 | // we prefer to have the server run instead of handling client requests |
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142 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
170 | socket_ev.prio (PE_PRIO_NORMAL); |
143 | socket_ev.fd (fd); |
171 | socket_ev.fd (fd); |
144 | socket_ev.poll (PE_R); |
172 | socket_ev.poll (PE_R); |
145 | |
173 | |
146 | // command handling is even lower priority |
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147 | // that way no client can monopolise the server |
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148 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
174 | cmd_ev.prio (PE_PRIO_NORMAL); |
149 | |
175 | |
150 | // initialisation done, kick it! |
176 | // initialisation done, kick it! |
151 | 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); |
152 | flush (); |
178 | flush (); |
153 | |
179 | |
154 | // clients are externally referenced by the socket |
180 | reset_stats (); |
155 | refcnt_inc (); |
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156 | clients.push_back (this); |
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157 | |
181 | |
158 | #if 0//TODO |
182 | clients.insert (this); |
159 | socket_info.nconns++; |
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160 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
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161 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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162 | #endif |
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163 | } |
183 | } |
164 | |
184 | |
165 | client::~client () |
185 | client::~client () |
166 | { |
186 | { |
167 | sockvec::iterator i = find (clients.begin (), clients.end (), this); |
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168 | if (i != clients.end ()) |
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169 | clients.erase (i); |
187 | clients.erase (this); |
170 | |
188 | |
171 | sfree<uint8> (faces_sent, nrofpixmaps); |
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172 | free (stats.range); |
189 | free (stats.range); |
173 | free (stats.title); |
190 | free (stats.title); |
174 | free (host); |
191 | free (host); |
175 | } |
192 | } |
176 | |
193 | |
… | |
… | |
181 | |
198 | |
182 | if (pl) |
199 | if (pl) |
183 | pl->disconnect (); |
200 | pl->disconnect (); |
184 | |
201 | |
185 | if (fd >= 0) |
202 | if (fd >= 0) |
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203 | { |
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204 | send_packet ("goodbye"); |
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205 | flush (); |
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206 | |
186 | close (fd); |
207 | close (fd); |
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208 | } |
187 | |
209 | |
188 | state = ST_DEAD; |
210 | state = ST_DEAD; |
189 | |
211 | |
190 | socket_ev.suspend (); |
212 | socket_ev.suspend (); |
191 | cmd_ev.suspend (); |
213 | cmd_ev.suspend (); |
192 | |
214 | |
193 | // socket now longer references us |
215 | refcnt_dec (); // socket no longer open |
194 | refcnt_dec (); |
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195 | } |
216 | } |
196 | |
217 | |
197 | /** This sets up the socket and reads all the image information into memory. */ |
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198 | void |
218 | void |
199 | init_ericserver (void) |
219 | client::reset_stats () |
200 | { |
220 | { |
201 | cst_tot.time_start = time (NULL); |
221 | /* we need to clear these to -1 and not zero - otherwise, |
202 | cst_lst.time_start = time (NULL); |
222 | * if a player quits and starts a new character, we wont |
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223 | * send new values to the client, as things like exp start |
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224 | * at zero. |
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225 | */ |
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226 | for (int i = 0; i < NUM_SKILLS; i++) |
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227 | last_skill_exp[i] = -1; |
203 | |
228 | |
204 | LOG (llevDebug, "Initialize new client/server data\n"); |
229 | for (int i = 0; i < NROFATTACKS; i++) |
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230 | last_resist[i] = -1; |
205 | |
231 | |
206 | read_client_images (); |
232 | last_weapon_sp = -1; |
207 | } |
233 | last_level = -1; |
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234 | last_stats.exp = -1; |
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235 | last_weight = (uint32) - 1; |
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236 | last_flags = 0; |
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237 | last_weight = 0; |
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238 | last_weight_limit = 0; |
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239 | last_path_attuned = 0; |
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240 | last_path_repelled = 0; |
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241 | last_path_denied = 0; |
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242 | last_speed = 0; |
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243 | last_flags = 0; |
208 | |
244 | |
209 | |
245 | static living zero_living; |
210 | /******************************************************************************* |
246 | last_stats = zero_living; |
211 | * |
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212 | * Start of functions dealing with freeing of the data. |
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213 | * |
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214 | ******************************************************************************/ |
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215 | |
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216 | /** Free's all the memory that ericserver allocates. */ |
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217 | void |
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218 | free_all_newserver (void) |
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219 | { |
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220 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
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221 | free_socket_images (); |
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222 | } |
247 | } |
223 | |
248 | |
224 | client * |
249 | client * |
225 | client::create (int fd, const char *peername) |
250 | client::create (int fd, const char *peername) |
226 | { |
251 | { |
227 | if (checkbanned (NULL, peername)) |
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228 | { |
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229 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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230 | return 0; |
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231 | } |
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232 | else |
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233 | { |
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234 | client *ns = new client (dup (fd), peername); |
252 | client *ns = new client (dup (fd), peername); |
235 | |
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236 | ns->instantiate (); // effectively a nop right now |
253 | ns->instantiate (); // effectively a nop right now |
237 | |
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238 | INVOKE_CLIENT (CONNECT, ns); |
254 | INVOKE_CLIENT (CONNECT, ns); |
239 | |
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240 | return ns; |
255 | return ns; |
241 | } |
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242 | } |
256 | } |
243 | |
257 | |