1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * CrossFire, A Multiplayer game for X-windows |
3 | |
3 | * |
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4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 2001 Mark Wedel |
5 | * Copyright (C) 2001 Mark Wedel |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (C) 1992 Frank Tore Johansen |
6 | |
7 | * |
7 | This program is free software; you can redistribute it and/or modify |
8 | * This program 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 2 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, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | |
21 | * |
21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
22 | * The author 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 | #ifdef HAVE_UNISTD_H |
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45 | # include <unistd.h> |
46 | #include <unistd.h> |
46 | #endif |
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47 | |
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48 | #ifdef HAVE_ARPA_INET_H |
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49 | # include <arpa/inet.h> |
47 | #include <arpa/inet.h> |
50 | #endif |
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51 | #include <newserver.h> |
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52 | |
48 | |
53 | Socket_Info socket_info; |
49 | #include <algorithm> |
54 | client_socket *init_sockets; |
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55 | |
50 | |
56 | client_socket::client_socket () |
51 | sockvec clients; |
57 | { |
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58 | } |
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59 | |
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60 | client_socket::~client_socket () |
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61 | { |
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62 | } |
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63 | |
52 | |
64 | /** |
53 | /** |
65 | * Initializes a connection. Really, it just sets up the data structure, |
54 | * Initializes a connection. Really, it just sets up the data structure, |
66 | * 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 |
67 | * client. |
56 | * client. |
68 | */ |
57 | */ |
69 | void |
58 | client::client (int fd, const char *peername) |
70 | client_socket::init (const char *from_ip) |
59 | : fd (fd), host (strdup (peername)), |
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60 | socket_ev (this, &client::socket_cb), |
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61 | cmd_ev (this, &client::cmd_cb), |
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62 | cc_inv (this), cc_other (this) |
71 | { |
63 | { |
72 | int bufsize = 65535; /*Supposed absolute upper limit */ |
64 | refcnt_inc (); // the socket is an external reference |
73 | int oldbufsize; |
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74 | int buflen = sizeof (int); |
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75 | |
65 | |
76 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
66 | { |
77 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
67 | struct linger linger_opt; |
78 | |
68 | |
79 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
69 | linger_opt.l_onoff = 0; |
80 | oldbufsize = 0; |
70 | linger_opt.l_linger = 0; |
81 | |
71 | |
82 | if (oldbufsize < bufsize) |
72 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
83 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
73 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
84 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
74 | } |
85 | |
75 | |
86 | buflen = sizeof (oldbufsize); |
76 | { |
87 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
77 | int val = IPTOS_LOWDELAY; |
88 | #ifdef ESRV_DEBUG |
78 | |
89 | LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
79 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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80 | LOG (llevError, "IP_TOS: %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 = 1; |
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85 | |
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86 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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87 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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88 | } |
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89 | |
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90 | #ifdef __linux__ |
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91 | { |
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92 | int val; |
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93 | |
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94 | // set some very aggressive keepalive parameters |
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95 | val = 10; |
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96 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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97 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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98 | |
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99 | val = 5; |
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100 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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101 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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102 | |
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103 | val = 1; |
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104 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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105 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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106 | } |
90 | #endif |
107 | #endif |
91 | |
108 | |
92 | faceset = 0; |
109 | { |
93 | facecache = 0; |
110 | int bufsize = 65535; /*Supposed absolute upper limit */ |
94 | image2 = 0; |
111 | int oldbufsize; |
95 | sound = 0; |
112 | int buflen = sizeof (int); |
96 | exp64 = 0; |
113 | |
97 | monitor_spells = 0; |
114 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
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115 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
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116 | |
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117 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
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118 | oldbufsize = 0; |
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119 | |
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120 | if (oldbufsize < bufsize) |
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121 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
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122 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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123 | |
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124 | buflen = sizeof (oldbufsize); |
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125 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
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126 | } |
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127 | |
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128 | state = ST_SETUP; |
98 | mapmode = Map0Cmd; |
129 | mapmode = Map0Cmd; |
99 | darkness = 1; |
130 | darkness = 1; |
100 | status = Ns_Add; |
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101 | mapx = 11; |
131 | mapx = 11; |
102 | mapy = 11; |
132 | mapy = 11; |
103 | newmapcmd = 0; |
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104 | itemcmd = 1; /* Default is version item1 command */ |
133 | itemcmd = 1; /* Default is version item1 command */ |
105 | ext_mapinfos = 0; /*extendedmapinfo datas */ |
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106 | EMI_smooth = 0; |
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107 | look_position = 0; |
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108 | update_look = 0; |
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109 | has_readable_type = 0; |
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110 | supported_readables = 0; |
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111 | monitor_spells = 0; |
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112 | mapinfocmd = 0; |
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113 | extcmd = 0; |
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114 | extmap = 0; |
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115 | |
134 | |
116 | /* we should really do some checking here - if total clients overflows |
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117 | * we need to do something more intelligent, because client id's will start |
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118 | * duplicating (not likely in normal cases, but malicous attacks that |
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119 | * just open and close connections could get this total up. |
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120 | */ |
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121 | inbuf_len = 0; |
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122 | |
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123 | /* Basic initialization. Needed because we do a check in |
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124 | * HandleClient for oldsocketmode without checking the |
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125 | * length of data. |
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126 | */ |
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127 | memset (&lastmap, 0, sizeof (struct Map)); |
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128 | memset (faces_sent, 0, faces_sent_len * sizeof (*faces_sent)); |
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129 | memset (&anims_sent, 0, sizeof (anims_sent)); |
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130 | memset (&stats, 0, sizeof (struct statsinfo)); |
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131 | /* Do this so we don't send a face command for the client for |
135 | /* Do this so we don't send a face command for the client for |
132 | * this face. Face 0 is sent to the client to say clear |
136 | * this face. Face 0 is sent to the client to say clear |
133 | * face information. |
137 | * face information. |
134 | */ |
138 | */ |
135 | faces_sent[0] = NS_FACESENT_FACE; |
139 | faces_sent[0] = true; |
136 | |
140 | |
137 | outputbuffer.start = 0; |
141 | socket_ev.prio (PE_PRIO_NORMAL); |
138 | outputbuffer.len = 0; |
142 | socket_ev.fd (fd); |
139 | can_write = 1; |
143 | socket_ev.poll (PE_R); |
140 | password_fails = 0; |
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141 | |
144 | |
142 | current_map = 0; |
145 | cmd_ev.prio (PE_PRIO_NORMAL); |
143 | current_x = 0; |
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144 | current_y = 0; |
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145 | client[0] = 0; |
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146 | buggy_mapscroll = 0; |
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147 | |
146 | |
148 | sent_scroll = 0; |
147 | // initialisation done, kick it! |
149 | host = strdup_local (from_ip); |
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150 | |
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151 | { |
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152 | packet sl; |
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153 | sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
148 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
154 | send_packet (sl); |
149 | flush (); |
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150 | |
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151 | reset_stats (); |
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152 | |
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153 | clients.insert (this); |
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154 | } |
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155 | |
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156 | client::~client () |
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157 | { |
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158 | clients.erase (this); |
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159 | |
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160 | free (stats.range); |
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161 | free (stats.title); |
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162 | free (host); |
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163 | } |
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164 | |
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165 | void |
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166 | client::do_destroy () |
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167 | { |
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168 | attachable::do_destroy (); |
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169 | |
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170 | if (pl) |
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171 | pl->disconnect (); |
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172 | |
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173 | if (fd >= 0) |
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174 | { |
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175 | send_packet ("goodbye"); |
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176 | flush (); |
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177 | |
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178 | close (fd); |
155 | } |
179 | } |
156 | |
180 | |
157 | if (socket_info.nconns > cst_tot.max_conn) |
181 | state = ST_DEAD; |
158 | cst_tot.max_conn = socket_info.nconns; |
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159 | if (socket_info.nconns > cst_lst.max_conn) |
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160 | cst_lst.max_conn = socket_info.nconns; |
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161 | } |
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162 | |
182 | |
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183 | socket_ev.suspend (); |
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184 | cmd_ev.suspend (); |
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185 | |
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186 | refcnt_dec (); // socket no longer open |
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187 | } |
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188 | |
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189 | void |
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190 | client::reset_stats () |
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191 | { |
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192 | /* we need to clear these to -1 and not zero - otherwise, |
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193 | * if a player quits and starts a new character, we wont |
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194 | * send new values to the client, as things like exp start |
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195 | * at zero. |
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196 | */ |
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197 | for (int i = 0; i < NUM_SKILLS; i++) |
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198 | last_skill_exp[i] = -1; |
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199 | |
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200 | for (int i = 0; i < NROFATTACKS; i++) |
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201 | last_resist[i] = -1; |
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202 | |
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203 | last_weapon_sp = -1; |
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204 | last_level = -1; |
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205 | last_stats.exp = -1; |
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206 | last_weight = (uint32) - 1; |
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207 | last_flags = 0; |
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208 | last_weight = 0; |
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209 | last_weight_limit = 0; |
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210 | last_path_attuned = 0; |
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211 | last_path_repelled = 0; |
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212 | last_path_denied = 0; |
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213 | last_speed = 0; |
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214 | flags = 0; |
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215 | |
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216 | static living zero_living; |
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217 | last_stats = zero_living; |
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218 | } |
163 | |
219 | |
164 | /** This sets up the socket and reads all the image information into memory. */ |
220 | /** This sets up the socket and reads all the image information into memory. */ |
165 | void |
221 | void |
166 | init_ericserver (void) |
222 | init_ericserver (void) |
167 | { |
223 | { |
168 | struct sockaddr_in insock; |
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169 | struct protoent *protox; |
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170 | struct linger linger_opt; |
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171 | |
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172 | socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
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173 | |
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174 | socket_info.timeout.tv_sec = 0; |
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175 | socket_info.timeout.tv_usec = 0; |
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176 | socket_info.nconns = 0; |
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177 | |
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178 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
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179 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
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180 | cst_tot.time_start = time (NULL); |
224 | cst_tot.time_start = time (NULL); |
181 | cst_lst.time_start = time (NULL); |
225 | cst_lst.time_start = time (NULL); |
182 | |
226 | |
183 | LOG (llevDebug, "Initialize new client/server data\n"); |
227 | LOG (llevDebug, "Initialize new client/server data\n"); |
184 | socket_info.nconns = 1; |
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185 | init_sockets = (client_socket *) malloc (sizeof (client_socket)); |
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186 | init_sockets[0].faces_sent = NULL; /* unused */ |
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187 | socket_info.allocated_sockets = 1; |
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188 | |
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189 | protox = getprotobyname ("tcp"); |
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190 | if (protox == NULL) |
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191 | { |
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192 | LOG (llevError, "init_ericserver: Error getting protox\n"); |
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193 | return; |
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194 | } |
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195 | |
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196 | init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
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197 | if (init_sockets[0].fd == -1) |
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198 | { |
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199 | LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
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200 | exit (-1); |
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201 | } |
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202 | |
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203 | insock.sin_family = AF_INET; |
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204 | insock.sin_port = htons (settings.csport); |
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205 | insock.sin_addr.s_addr = htonl (INADDR_ANY); |
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206 | |
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207 | linger_opt.l_onoff = 0; |
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208 | linger_opt.l_linger = 0; |
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209 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
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210 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
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211 | |
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212 | { |
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213 | int tmp = 1; |
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214 | |
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215 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
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216 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
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217 | } |
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218 | |
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219 | if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
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220 | { |
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221 | LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
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222 | close (init_sockets[0].fd); |
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223 | exit (-1); |
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224 | } |
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225 | |
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226 | if (listen (init_sockets[0].fd, 5) == (-1)) |
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227 | { |
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228 | LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
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229 | close (init_sockets[0].fd); |
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230 | exit (-1); |
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231 | } |
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232 | |
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233 | init_sockets[0].status = Ns_Add; |
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234 | read_client_images (); |
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235 | } |
228 | } |
236 | |
229 | |
237 | |
230 | |
238 | /******************************************************************************* |
231 | /******************************************************************************* |
239 | * |
232 | * |
… | |
… | |
245 | void |
238 | void |
246 | free_all_newserver (void) |
239 | free_all_newserver (void) |
247 | { |
240 | { |
248 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
241 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
249 | free_socket_images (); |
242 | free_socket_images (); |
250 | free (init_sockets); |
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251 | } |
243 | } |
252 | |
244 | |
253 | /** |
245 | client * |
254 | * Frees a socket. |
246 | client::create (int fd, const char *peername) |
255 | * Basically, all we need to do here is free all data structures that |
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256 | * might be associated with the socket. It is up to the caller to |
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257 | * update the list |
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258 | */ |
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259 | |
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260 | void |
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261 | free_newsocket (client_socket *ns) |
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262 | { |
247 | { |
263 | close (ns->fd); |
248 | client *ns = new client (dup (fd), peername); |
264 | |
249 | ns->instantiate (); // effectively a nop right now |
265 | if (ns->stats.range) |
250 | INVOKE_CLIENT (CONNECT, ns); |
266 | free (ns->stats.range); |
251 | return ns; |
267 | |
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268 | if (ns->stats.title) |
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269 | free (ns->stats.title); |
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270 | |
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271 | free (ns->host); |
|
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272 | } |
252 | } |
273 | |
253 | |
274 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
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275 | void |
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276 | final_free_player (player *pl) |
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277 | { |
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278 | pl->socket.send_packet ("goodbye"); |
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279 | free_newsocket (&pl->socket); |
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280 | free_player (pl); |
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281 | } |
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282 | |
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