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 |
… | |
… | |
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 | { |
73 | int oldbufsize; |
65 | struct linger linger_opt; |
74 | int buflen = sizeof (int); |
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75 | |
66 | |
76 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
67 | linger_opt.l_onoff = 0; |
77 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
68 | linger_opt.l_linger = 0; |
78 | |
69 | |
79 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
70 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
80 | oldbufsize = 0; |
71 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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72 | } |
81 | |
73 | |
82 | if (oldbufsize < bufsize) |
74 | { |
83 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
75 | int val = IPTOS_LOWDELAY; |
84 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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85 | |
76 | |
86 | buflen = sizeof (oldbufsize); |
77 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
87 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
78 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
88 | #ifdef ESRV_DEBUG |
79 | } |
89 | LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
80 | |
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81 | { |
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82 | int val = 1; |
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83 | |
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84 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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85 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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86 | } |
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87 | |
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88 | #ifdef __linux__ |
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89 | { |
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90 | int val; |
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91 | |
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92 | // set some very aggressive keepalive parameters |
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93 | val = 10; |
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94 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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95 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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96 | |
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97 | val = 5; |
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98 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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99 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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100 | |
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101 | val = 1; |
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102 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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103 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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104 | } |
90 | #endif |
105 | #endif |
91 | |
106 | |
92 | faceset = 0; |
107 | { |
93 | facecache = 0; |
108 | int bufsize = 65535; /*Supposed absolute upper limit */ |
94 | image2 = 0; |
109 | int oldbufsize; |
95 | sound = 0; |
110 | int buflen = sizeof (int); |
96 | exp64 = 0; |
111 | |
97 | monitor_spells = 0; |
112 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
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113 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
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114 | |
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115 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
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116 | oldbufsize = 0; |
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117 | |
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118 | if (oldbufsize < bufsize) |
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119 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
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120 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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121 | |
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122 | buflen = sizeof (oldbufsize); |
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123 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
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124 | } |
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125 | |
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126 | state = ST_SETUP; |
98 | mapmode = Map0Cmd; |
127 | mapmode = Map0Cmd; |
99 | darkness = 1; |
128 | darkness = 1; |
100 | status = Ns_Add; |
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101 | mapx = 11; |
129 | mapx = 11; |
102 | mapy = 11; |
130 | mapy = 11; |
103 | newmapcmd = 0; |
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104 | itemcmd = 1; /* Default is version item1 command */ |
131 | 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 | |
132 | |
116 | /* we should really do some checking here - if total clients overflows |
133 | faces_sent = salloc0<uint8> (nrofpixmaps); |
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 | |
134 | |
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] = NS_FACESENT_FACE; |
136 | |
140 | |
137 | outputbuffer.start = 0; |
141 | // socket I/O is low priority |
138 | outputbuffer.len = 0; |
142 | // we prefer to have the server run instead of handling client requests |
139 | can_write = 1; |
143 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
140 | password_fails = 0; |
144 | socket_ev.fd (fd); |
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145 | socket_ev.poll (PE_R); |
141 | |
146 | |
142 | current_map = 0; |
147 | // command handling is even lower priority |
143 | current_x = 0; |
148 | // that way no client can monopolise the server |
144 | current_y = 0; |
149 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
145 | client[0] = 0; |
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146 | buggy_mapscroll = 0; |
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147 | |
150 | |
148 | sent_scroll = 0; |
151 | // 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); |
152 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
154 | send_packet (sl); |
153 | flush (); |
155 | } |
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156 | |
154 | |
157 | if (socket_info.nconns > cst_tot.max_conn) |
155 | // clients are externally referenced by the socket |
158 | cst_tot.max_conn = socket_info.nconns; |
156 | refcnt_inc (); |
159 | if (socket_info.nconns > cst_lst.max_conn) |
157 | clients.push_back (this); |
160 | cst_lst.max_conn = socket_info.nconns; |
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161 | } |
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162 | |
158 | |
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159 | #if 0//TODO |
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160 | socket_info.nconns++; |
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161 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
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162 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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163 | #endif |
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164 | } |
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165 | |
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166 | client::~client () |
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167 | { |
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168 | sockvec::iterator i = find (clients.begin (), clients.end (), this); |
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169 | if (i != clients.end ()) |
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170 | clients.erase (i); |
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171 | |
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172 | sfree<uint8> (faces_sent, nrofpixmaps); |
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173 | free (stats.range); |
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174 | free (stats.title); |
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175 | free (host); |
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176 | } |
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177 | |
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178 | void |
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179 | client::do_destroy () |
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180 | { |
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181 | attachable::do_destroy (); |
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182 | |
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183 | if (pl) |
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184 | pl->disconnect (); |
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185 | |
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186 | if (fd >= 0) |
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187 | close (fd); |
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188 | |
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189 | state = ST_DEAD; |
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190 | |
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191 | socket_ev.suspend (); |
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192 | cmd_ev.suspend (); |
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193 | |
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194 | // socket now longer references us |
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195 | refcnt_dec (); |
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196 | } |
163 | |
197 | |
164 | /** This sets up the socket and reads all the image information into memory. */ |
198 | /** This sets up the socket and reads all the image information into memory. */ |
165 | void |
199 | void |
166 | init_ericserver (void) |
200 | init_ericserver (void) |
167 | { |
201 | { |
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); |
202 | cst_tot.time_start = time (NULL); |
181 | cst_lst.time_start = time (NULL); |
203 | cst_lst.time_start = time (NULL); |
182 | |
204 | |
183 | LOG (llevDebug, "Initialize new client/server data\n"); |
205 | 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 | |
206 | |
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 (); |
207 | read_client_images (); |
235 | } |
208 | } |
236 | |
209 | |
237 | |
210 | |
238 | /******************************************************************************* |
211 | /******************************************************************************* |
… | |
… | |
245 | void |
218 | void |
246 | free_all_newserver (void) |
219 | free_all_newserver (void) |
247 | { |
220 | { |
248 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
221 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
249 | free_socket_images (); |
222 | free_socket_images (); |
250 | free (init_sockets); |
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251 | } |
223 | } |
252 | |
224 | |
253 | /** |
225 | client * |
254 | * Frees a socket. |
226 | 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 | { |
227 | { |
263 | close (ns->fd); |
228 | if (checkbanned (NULL, peername)) |
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229 | { |
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230 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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231 | return 0; |
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232 | } |
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233 | else |
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234 | { |
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235 | client *ns = new client (dup (fd), peername); |
264 | |
236 | |
265 | if (ns->stats.range) |
237 | ns->instantiate (); // effectively a nop right now |
266 | free (ns->stats.range); |
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267 | |
238 | |
268 | if (ns->stats.title) |
239 | INVOKE_CLIENT (CONNECT, ns); |
269 | free (ns->stats.title); |
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270 | |
240 | |
271 | free (ns->host); |
241 | return ns; |
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242 | } |
272 | } |
243 | } |
273 | |
244 | |
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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