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> |
46 | #include <newserver.h> |
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47 | |
48 | |
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49 | #include <algorithm> |
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50 | |
48 | sockvec client_sockets; |
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_socket::client_socket (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::socket_cb) |
60 | socket_ev (this, &client::socket_cb), |
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61 | cmd_ev (this, &client::cmd_cb) |
58 | { |
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 | |
59 | { |
67 | { |
60 | struct linger linger_opt; |
68 | struct linger linger_opt; |
61 | |
69 | |
62 | linger_opt.l_onoff = 0; |
70 | linger_opt.l_onoff = 0; |
63 | linger_opt.l_linger = 0; |
71 | linger_opt.l_linger = 0; |
64 | |
72 | |
65 | 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))) |
66 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
74 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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75 | } |
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76 | |
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77 | { |
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78 | int val; |
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79 | |
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80 | #ifdef IP_TOS |
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81 | val = IPTOS_LOWDELAY; |
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82 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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83 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
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84 | #endif |
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85 | |
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86 | #ifdef TCP_NODELAY |
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87 | val = 1; |
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88 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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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 |
67 | } |
117 | } |
68 | |
118 | |
69 | { |
119 | { |
70 | int bufsize = 65535; /*Supposed absolute upper limit */ |
120 | int bufsize = 65535; /*Supposed absolute upper limit */ |
71 | int oldbufsize; |
121 | int oldbufsize; |
… | |
… | |
83 | |
133 | |
84 | buflen = sizeof (oldbufsize); |
134 | buflen = sizeof (oldbufsize); |
85 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
135 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
86 | } |
136 | } |
87 | |
137 | |
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138 | state = ST_SETUP; |
88 | mapmode = Map0Cmd; |
139 | mapmode = Map0Cmd; |
89 | darkness = 1; |
140 | darkness = 1; |
90 | status = Ns_Add; |
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91 | mapx = 11; |
141 | mapx = 11; |
92 | mapy = 11; |
142 | mapy = 11; |
93 | itemcmd = 1; /* Default is version item1 command */ |
143 | itemcmd = 1; /* Default is version item1 command */ |
94 | |
144 | 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 | |
145 | |
100 | /* 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 |
101 | * 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 |
102 | * face information. |
148 | * face information. |
103 | */ |
149 | */ |
104 | faces_sent[0] = NS_FACESENT_FACE; |
150 | faces_sent[0] = true; |
105 | |
151 | |
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152 | socket_ev.prio (PE_PRIO_NORMAL); |
106 | socket_ev.fd (fd); |
153 | socket_ev.fd (fd); |
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154 | socket_ev.poll (PE_R); |
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155 | |
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156 | cmd_ev.prio (PE_PRIO_NORMAL); |
107 | |
157 | |
108 | // initialisation done, kick it! |
158 | // initialisation done, kick it! |
109 | |
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110 | { |
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111 | packet sl; |
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112 | sl.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); |
113 | send_packet (sl); |
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114 | flush (); |
160 | flush (); |
115 | } |
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116 | |
161 | |
117 | #if 0//TODO |
162 | reset_stats (); |
118 | socket_info.nconns++; |
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119 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
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120 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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121 | #endif |
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122 | } |
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123 | |
163 | |
124 | client_socket::~client_socket () |
164 | clients.insert (this); |
125 | { |
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126 | status = Ns_Dead; |
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127 | } |
165 | } |
128 | |
166 | |
129 | /** This sets up the socket and reads all the image information into memory. */ |
167 | client::~client () |
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168 | { |
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169 | clients.erase (this); |
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170 | |
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171 | free (stats.range); |
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172 | free (stats.title); |
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173 | free (host); |
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174 | } |
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175 | |
130 | void |
176 | void |
131 | init_ericserver (void) |
177 | client::do_destroy () |
132 | { |
178 | { |
133 | struct sockaddr_in insock; |
179 | attachable::do_destroy (); |
134 | struct linger linger_opt; |
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135 | |
180 | |
136 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
181 | if (pl) |
137 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
182 | pl->disconnect (); |
138 | cst_tot.time_start = time (NULL); |
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139 | cst_lst.time_start = time (NULL); |
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140 | |
183 | |
141 | LOG (llevDebug, "Initialize new client/server data\n"); |
184 | if (fd >= 0) |
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185 | { |
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186 | send_packet ("goodbye"); |
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187 | flush (); |
142 | |
188 | |
143 | read_client_images (); |
189 | close (fd); |
144 | } |
190 | } |
145 | |
191 | |
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192 | state = ST_DEAD; |
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193 | |
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194 | socket_ev.suspend (); |
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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; |
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229 | } |
146 | |
230 | |
147 | /******************************************************************************* |
231 | /******************************************************************************* |
148 | * |
232 | * |
149 | * Start of functions dealing with freeing of the data. |
233 | * Start of functions dealing with freeing of the data. |
150 | * |
234 | * |
… | |
… | |
156 | { |
240 | { |
157 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
241 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
158 | free_socket_images (); |
242 | free_socket_images (); |
159 | } |
243 | } |
160 | |
244 | |
161 | /** |
245 | client * |
162 | * Frees a socket. |
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163 | * Basically, all we need to do here is free all data structures that |
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164 | * might be associated with the socket. It is up to the caller to |
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165 | * update the list |
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166 | */ |
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167 | |
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168 | void |
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169 | free_newsocket (client_socket *ns) |
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170 | { |
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171 | if (ns->fd >= 0) |
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172 | close (ns->fd); |
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173 | |
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174 | if (ns->stats.range) |
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175 | free (ns->stats.range); |
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176 | |
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177 | if (ns->stats.title) |
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178 | free (ns->stats.title); |
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179 | |
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180 | free (ns->host); |
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181 | |
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182 | ns->fd = -1; |
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183 | ns->stats.range = 0; |
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184 | ns->stats.title = 0; |
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185 | ns->host = 0; |
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186 | } |
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187 | |
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188 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
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189 | void |
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190 | final_free_player (player *pl) |
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191 | { |
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192 | pl->socket->send_packet ("goodbye"); |
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193 | free_newsocket (pl->socket); |
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194 | free_player (pl); |
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195 | } |
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196 | |
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197 | bool |
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198 | add_client_socket (int fd, const char *peername) |
246 | client::create (int fd, const char *peername) |
199 | { |
247 | { |
200 | if (checkbanned (NULL, peername)) |
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201 | { |
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202 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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203 | return false; |
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204 | } |
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205 | else |
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206 | { |
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207 | client_socket *ns = new client_socket (dup (fd), peername); |
248 | client *ns = new client (dup (fd), peername); |
208 | client_sockets.push_back (ns); |
249 | ns->instantiate (); // effectively a nop right now |
209 | return true; |
250 | INVOKE_CLIENT (CONNECT, ns); |
210 | } |
251 | return ns; |
211 | } |
252 | } |
212 | |
253 | |