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 | * |
… | |
… | |
29 | * |
30 | * |
30 | * Mainly deals with initialization and higher level socket |
31 | * Mainly deals with initialization and higher level socket |
31 | * maintenance (checking for lost connections and if data has arrived.) |
32 | * maintenance (checking for lost connections and if data has arrived.) |
32 | * The reading of data is handled in ericserver.c |
33 | * The reading of data is handled in ericserver.c |
33 | */ |
34 | */ |
34 | |
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35 | |
35 | |
36 | #include <global.h> |
36 | #include <global.h> |
37 | #include <sproto.h> |
37 | #include <sproto.h> |
38 | #include <sys/types.h> |
38 | #include <sys/types.h> |
39 | #include <sys/time.h> |
39 | #include <sys/time.h> |
40 | #include <sys/socket.h> |
40 | #include <sys/socket.h> |
41 | #include <netinet/in.h> |
41 | #include <netinet/in.h> |
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42 | #include <netinet/tcp.h> |
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43 | #include <netinet/ip.h> |
42 | #include <netdb.h> |
44 | #include <netdb.h> |
43 | |
45 | |
44 | #include <unistd.h> |
46 | #include <unistd.h> |
45 | #include <arpa/inet.h> |
47 | #include <arpa/inet.h> |
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48 | |
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49 | #include <algorithm> |
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50 | |
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51 | // use relatively small values, as we do not expect to receive much, |
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52 | // and we do userspace write buffering |
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53 | // 8kb limits throughput to roughly 66kb/s |
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54 | #define SOCKET_RCVBUF 8192 |
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55 | #define SOCKET_SNDBUF 16384 |
46 | |
56 | |
47 | sockvec clients; |
57 | sockvec clients; |
48 | |
58 | |
49 | /** |
59 | /** |
50 | * Initializes a connection. Really, it just sets up the data structure, |
60 | * Initializes a connection. Really, it just sets up the data structure, |
… | |
… | |
54 | client::client (int fd, const char *peername) |
64 | client::client (int fd, const char *peername) |
55 | : fd (fd), host (strdup (peername)), |
65 | : fd (fd), host (strdup (peername)), |
56 | socket_ev (this, &client::socket_cb), |
66 | socket_ev (this, &client::socket_cb), |
57 | cmd_ev (this, &client::cmd_cb) |
67 | cmd_ev (this, &client::cmd_cb) |
58 | { |
68 | { |
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69 | refcnt_inc (); // the socket is an external reference |
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70 | |
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71 | mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
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72 | |
59 | { |
73 | { |
60 | struct linger linger_opt; |
74 | struct linger linger_opt; |
61 | |
75 | |
62 | linger_opt.l_onoff = 0; |
76 | linger_opt.l_onoff = 0; |
63 | linger_opt.l_linger = 0; |
77 | linger_opt.l_linger = 0; |
64 | |
78 | |
65 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
79 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
66 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
80 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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81 | } |
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82 | |
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83 | { |
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84 | int val; |
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85 | |
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86 | #ifdef SO_RCVBUF |
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87 | val = SOCKET_RCVBUF; |
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88 | if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val))) |
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89 | LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno)); |
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90 | #endif |
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91 | |
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92 | #ifdef SO_SNDBUF |
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93 | val = SOCKET_SNDBUF; |
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94 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val))) |
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95 | LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno)); |
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96 | #endif |
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97 | |
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98 | #ifdef IP_TOS |
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99 | val = IPTOS_LOWDELAY; |
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100 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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101 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
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102 | #endif |
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103 | |
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104 | #ifdef TCP_NODELAY |
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105 | val = 1; |
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106 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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107 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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108 | #endif |
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109 | |
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110 | // set some very aggressive keepalive parameters |
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111 | #ifdef TCP_KEEPIDLE |
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112 | val = 1; |
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113 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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114 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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115 | #endif |
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116 | |
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117 | #ifdef TCP_KEEPCNT |
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118 | val = 3; |
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119 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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120 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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121 | #endif |
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122 | |
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123 | #ifdef TCP_KEEPINTVL |
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124 | val = 1; |
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125 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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126 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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127 | #endif |
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128 | |
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129 | // try to find the mss value in use |
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130 | #ifdef TCP_MAXSEG |
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131 | socklen_t sl = sizeof (val); |
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132 | if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
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133 | mss = val; |
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134 | #endif |
67 | } |
135 | } |
68 | |
136 | |
69 | { |
137 | { |
70 | int bufsize = 65535; /*Supposed absolute upper limit */ |
138 | int bufsize = 65535; /*Supposed absolute upper limit */ |
71 | int oldbufsize; |
139 | int oldbufsize; |
… | |
… | |
83 | |
151 | |
84 | buflen = sizeof (oldbufsize); |
152 | buflen = sizeof (oldbufsize); |
85 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
153 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
86 | } |
154 | } |
87 | |
155 | |
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156 | state = ST_SETUP; |
88 | mapmode = Map0Cmd; |
157 | mapmode = Map0Cmd; |
89 | darkness = 1; |
158 | darkness = 1; |
90 | status = Ns_Add; |
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91 | mapx = 11; |
159 | mapx = 11; |
92 | mapy = 11; |
160 | mapy = 11; |
93 | itemcmd = 1; /* Default is version item1 command */ |
161 | itemcmd = 1; /* Default is version item1 command */ |
94 | |
162 | max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
95 | faces_sent_len = nrofpixmaps; |
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96 | faces_sent = (uint8 *)calloc (nrofpixmaps, sizeof (*faces_sent)); |
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97 | if (!faces_sent) |
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98 | fatal (OUT_OF_MEMORY); |
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99 | |
163 | |
100 | /* Do this so we don't send a face command for the client for |
164 | /* Do this so we don't send a face command for the client for |
101 | * this face. Face 0 is sent to the client to say clear |
165 | * this face. Face 0 is sent to the client to say clear |
102 | * face information. |
166 | * face information. |
103 | */ |
167 | */ |
104 | faces_sent[0] = NS_FACESENT_FACE; |
168 | faces_sent[0] = true; |
105 | |
169 | |
106 | // socket I/O is low priority |
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107 | // we prefer to have the server run instead of handling client requests |
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108 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
170 | socket_ev.prio (PE_PRIO_NORMAL); |
109 | socket_ev.fd (fd); |
171 | socket_ev.fd (fd); |
110 | socket_ev.poll (PE_R); |
172 | socket_ev.poll (PE_R); |
111 | |
173 | |
112 | // command handling is even lower priority |
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113 | // that way no client can monopolise the server |
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114 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
174 | cmd_ev.prio (PE_PRIO_NORMAL); |
115 | |
175 | |
116 | // initialisation done, kick it! |
176 | // initialisation done, kick it! |
117 | |
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118 | 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); |
119 | flush (); |
178 | flush (); |
120 | |
179 | |
121 | #if 0//TODO |
180 | reset_stats (); |
122 | socket_info.nconns++; |
181 | |
123 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
182 | clients.insert (this); |
124 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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125 | #endif |
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126 | } |
183 | } |
127 | |
184 | |
128 | client::~client () |
185 | client::~client () |
129 | { |
186 | { |
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187 | clients.erase (this); |
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188 | |
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189 | free (stats.range); |
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190 | free (stats.title); |
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191 | free (host); |
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192 | } |
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193 | |
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194 | void |
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195 | client::do_destroy () |
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196 | { |
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197 | attachable::do_destroy (); |
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198 | |
130 | if (pl) |
199 | if (pl) |
131 | pl->socket = 0; |
200 | pl->disconnect (); |
132 | |
201 | |
133 | if (fd >= 0) |
202 | if (fd >= 0) |
134 | close (fd), fd = -1; |
203 | { |
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204 | send_packet ("goodbye"); |
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205 | flush (); |
135 | |
206 | |
136 | free (stats.range), stats.range = 0; |
207 | close (fd); |
137 | free (stats.title), stats.title = 0; |
208 | } |
138 | free (host), host = 0; |
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139 | } |
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140 | |
209 | |
141 | void |
210 | state = ST_DEAD; |
142 | client::destroy () |
211 | |
143 | { |
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144 | status = Ns_Dead; |
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145 | socket_ev.suspend (); |
212 | socket_ev.suspend (); |
146 | cmd_ev.suspend (); |
213 | cmd_ev.suspend (); |
147 | } |
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148 | |
214 | |
149 | /** This sets up the socket and reads all the image information into memory. */ |
215 | refcnt_dec (); // socket no longer open |
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216 | } |
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217 | |
150 | void |
218 | void |
151 | init_ericserver (void) |
219 | client::reset_stats () |
152 | { |
220 | { |
153 | cst_tot.time_start = time (NULL); |
221 | /* we need to clear these to -1 and not zero - otherwise, |
154 | 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; |
155 | |
228 | |
156 | 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; |
157 | |
231 | |
158 | read_client_images (); |
232 | last_weapon_sp = -1; |
159 | } |
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; |
160 | |
244 | |
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245 | static living zero_living; |
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246 | last_stats = zero_living; |
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247 | } |
161 | |
248 | |
162 | /******************************************************************************* |
249 | /******************************************************************************* |
163 | * |
250 | * |
164 | * Start of functions dealing with freeing of the data. |
251 | * Start of functions dealing with freeing of the data. |
165 | * |
252 | * |
… | |
… | |
171 | { |
258 | { |
172 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
259 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
173 | free_socket_images (); |
260 | free_socket_images (); |
174 | } |
261 | } |
175 | |
262 | |
176 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
263 | client * |
177 | void |
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178 | final_free_player (player *pl) |
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179 | { |
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180 | free_player (pl); |
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181 | } |
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182 | |
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183 | bool |
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184 | add_client (int fd, const char *peername) |
264 | client::create (int fd, const char *peername) |
185 | { |
265 | { |
186 | if (checkbanned (NULL, peername)) |
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187 | { |
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188 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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189 | return false; |
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190 | } |
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191 | else |
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192 | { |
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193 | client *ns = new client (dup (fd), peername); |
266 | client *ns = new client (dup (fd), peername); |
194 | clients.push_back (ns); |
267 | ns->instantiate (); // effectively a nop right now |
195 | return true; |
268 | INVOKE_CLIENT (CONNECT, ns); |
196 | } |
269 | return ns; |
197 | } |
270 | } |
198 | |
271 | |