1 | |
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2 | /* |
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3 | * static char *rcsid_init_c = |
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4 | * "$Id: init.C,v 1.7 2006/09/10 13:43:33 root Exp $"; |
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5 | */ |
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6 | |
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7 | /* |
1 | /* |
8 | CrossFire, A Multiplayer game for X-windows |
2 | CrossFire, A Multiplayer game for X-windows |
9 | |
3 | |
10 | Copyright (C) 2001 Mark Wedel |
4 | Copyright (C) 2001 Mark Wedel |
11 | Copyright (C) 1992 Frank Tore Johansen |
5 | Copyright (C) 1992 Frank Tore Johansen |
… | |
… | |
22 | |
16 | |
23 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
24 | along with this program; if not, write to the Free Software |
18 | along with this program; if not, write to the Free Software |
25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
26 | |
20 | |
27 | The author can be reached via e-mail to crossfire-devel@real-time.com |
21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
28 | */ |
22 | */ |
29 | |
23 | |
30 | /** |
24 | /** |
31 | * \file |
25 | * \file |
32 | * Socket general functions |
26 | * Socket general functions |
… | |
… | |
38 | * The reading of data is handled in ericserver.c |
32 | * The reading of data is handled in ericserver.c |
39 | */ |
33 | */ |
40 | |
34 | |
41 | |
35 | |
42 | #include <global.h> |
36 | #include <global.h> |
43 | #ifndef __CEXTRACT__ |
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44 | # include <sproto.h> |
37 | #include <sproto.h> |
45 | #endif |
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46 | #ifndef WIN32 /* ---win32 exclude include files */ |
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47 | # include <sys/types.h> |
38 | #include <sys/types.h> |
48 | # include <sys/time.h> |
39 | #include <sys/time.h> |
49 | # include <sys/socket.h> |
40 | #include <sys/socket.h> |
50 | # include <netinet/in.h> |
41 | #include <netinet/in.h> |
51 | # include <netdb.h> |
42 | #include <netdb.h> |
52 | #endif /* win32 */ |
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53 | |
43 | |
54 | #ifdef HAVE_UNISTD_H |
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55 | # include <unistd.h> |
44 | #include <unistd.h> |
56 | #endif |
45 | #include <arpa/inet.h> |
57 | |
46 | |
58 | #ifdef HAVE_ARPA_INET_H |
47 | sockvec clients; |
59 | # include <arpa/inet.h> |
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60 | #endif |
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61 | #include <newserver.h> |
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62 | |
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63 | Socket_Info socket_info; |
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64 | NewSocket *init_sockets; |
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65 | |
48 | |
66 | /** |
49 | /** |
67 | * Initializes a connection. Really, it just sets up the data structure, |
50 | * Initializes a connection. Really, it just sets up the data structure, |
68 | * socket setup is handled elsewhere. We do send a version to the |
51 | * socket setup is handled elsewhere. We do send a version to the |
69 | * client. |
52 | * client. |
70 | */ |
53 | */ |
71 | void |
54 | client::client (int fd, const char *peername) |
72 | InitConnection (NewSocket * ns, const char *from_ip) |
55 | : fd (fd), host (strdup (peername)), |
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56 | socket_ev (this, &client::socket_cb), |
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57 | cmd_ev (this, &client::cmd_cb) |
73 | { |
58 | { |
74 | SockList sl; |
59 | { |
75 | char buf[256]; |
60 | struct linger linger_opt; |
76 | int bufsize = 65535; /*Supposed absolute upper limit */ |
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77 | int oldbufsize; |
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78 | int buflen = sizeof (int); |
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79 | |
61 | |
80 | #ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */ |
62 | linger_opt.l_onoff = 0; |
81 | int temp = 1; |
63 | linger_opt.l_linger = 0; |
82 | |
64 | |
83 | if (ioctlsocket (ns->fd, FIONBIO, &temp) == -1) |
65 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
84 | LOG (llevError, "InitConnection: Error on ioctlsocket.\n"); |
66 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
85 | #else |
67 | } |
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68 | |
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69 | { |
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70 | int bufsize = 65535; /*Supposed absolute upper limit */ |
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71 | int oldbufsize; |
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72 | int buflen = sizeof (int); |
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73 | |
86 | if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) |
74 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
87 | { |
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88 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
75 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
89 | } |
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90 | #endif /* end win32 */ |
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91 | |
76 | |
92 | if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
77 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
93 | oldbufsize = 0; |
78 | oldbufsize = 0; |
94 | if (oldbufsize < bufsize) |
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95 | { |
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96 | #ifdef ESRV_DEBUG |
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97 | LOG (llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize); |
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98 | #endif |
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99 | if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
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100 | { |
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101 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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102 | } |
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103 | } |
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104 | buflen = sizeof (oldbufsize); |
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105 | getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
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106 | #ifdef ESRV_DEBUG |
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107 | LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
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108 | #endif |
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109 | |
79 | |
110 | ns->faceset = 0; |
80 | if (oldbufsize < bufsize) |
111 | ns->facecache = 0; |
81 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
112 | ns->image2 = 0; |
82 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
113 | ns->sound = 0; |
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114 | ns->exp64 = 0; |
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115 | ns->monitor_spells = 0; |
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116 | ns->mapmode = Map0Cmd; |
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117 | ns->darkness = 1; |
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118 | ns->status = Ns_Add; |
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119 | ns->comment = NULL; |
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120 | ns->old_mode = (Old_Mode) 0; |
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121 | ns->mapx = 11; |
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122 | ns->mapy = 11; |
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123 | ns->newmapcmd = 0; |
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124 | ns->itemcmd = 1; /* Default is version item1 command */ |
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125 | ns->ext_mapinfos = 0; /*extendedmapinfo datas */ |
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126 | ns->EMI_smooth = 0; |
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127 | ns->look_position = 0; |
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128 | ns->update_look = 0; |
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129 | ns->has_readable_type = 0; |
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130 | ns->supported_readables = 0; |
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131 | ns->monitor_spells = 0; |
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132 | ns->mapinfocmd = 0; |
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133 | ns->extcmd = 0; |
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134 | ns->extmap = 0; |
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135 | |
83 | |
136 | /* we should really do some checking here - if total clients overflows |
84 | buflen = sizeof (oldbufsize); |
137 | * we need to do something more intelligent, because client id's will start |
85 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
138 | * duplicating (not likely in normal cases, but malicous attacks that |
86 | } |
139 | * just open and close connections could get this total up. |
87 | |
140 | */ |
88 | mapmode = Map0Cmd; |
141 | ns->inbuf.len = 0; |
89 | darkness = 1; |
142 | ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF); |
90 | status = Ns_Add; |
143 | /* Basic initialization. Needed because we do a check in |
91 | mapx = 11; |
144 | * HandleClient for oldsocketmode without checking the |
92 | mapy = 11; |
145 | * length of data. |
93 | itemcmd = 1; /* Default is version item1 command */ |
146 | */ |
94 | |
147 | memset (ns->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF); |
95 | faces_sent = salloc<uint8> (nrofpixmaps, 0); |
148 | memset (&ns->lastmap, 0, sizeof (struct Map)); |
96 | |
149 | memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent)); |
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150 | memset (&ns->anims_sent, 0, sizeof (ns->anims_sent)); |
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151 | memset (&ns->stats, 0, sizeof (struct statsinfo)); |
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152 | /* Do this so we don't send a face command for the client for |
97 | /* Do this so we don't send a face command for the client for |
153 | * this face. Face 0 is sent to the client to say clear |
98 | * this face. Face 0 is sent to the client to say clear |
154 | * face information. |
99 | * face information. |
155 | */ |
100 | */ |
156 | ns->faces_sent[0] = NS_FACESENT_FACE; |
101 | faces_sent[0] = NS_FACESENT_FACE; |
157 | |
102 | |
158 | ns->outputbuffer.start = 0; |
103 | // socket I/O is low priority |
159 | ns->outputbuffer.len = 0; |
104 | // we prefer to have the server run instead of handling client requests |
160 | ns->can_write = 1; |
105 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
161 | ns->password_fails = 0; |
106 | socket_ev.fd (fd); |
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107 | socket_ev.poll (PE_R); |
162 | |
108 | |
163 | ns->current_map = 0; |
109 | // command handling is even lower priority |
164 | ns->current_x = 0; |
110 | // that way no client can monopolise the server |
165 | ns->current_y = 0; |
111 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
166 | ns->client[0] = 0; |
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167 | ns->buggy_mapscroll = 0; |
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168 | |
112 | |
169 | ns->sent_scroll = 0; |
113 | // initialisation done, kick it! |
170 | ns->host = strdup_local (from_ip); |
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171 | sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
114 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
172 | sl.buf = (unsigned char *) buf; |
115 | flush (); |
173 | sl.len = strlen ((char *) buf); |
116 | |
174 | Send_With_Handling (ns, &sl); |
117 | #if 0//TODO |
175 | #ifdef CS_LOGSTATS |
118 | socket_info.nconns++; |
176 | if (socket_info.nconns > cst_tot.max_conn) |
119 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
177 | cst_tot.max_conn = socket_info.nconns; |
120 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
178 | if (socket_info.nconns > cst_lst.max_conn) |
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179 | cst_lst.max_conn = socket_info.nconns; |
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180 | #endif |
121 | #endif |
181 | } |
122 | } |
182 | |
123 | |
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124 | client::~client () |
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125 | { |
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126 | if (pl) |
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127 | pl->socket = 0; |
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128 | |
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129 | if (fd >= 0) |
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130 | close (fd); |
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131 | |
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132 | free (faces_sent); |
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133 | free (stats.range); |
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134 | free (stats.title); |
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135 | free (host); |
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136 | } |
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137 | |
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138 | void |
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139 | client::destroy () |
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140 | { |
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141 | status = Ns_Dead; |
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142 | socket_ev.suspend (); |
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143 | cmd_ev.suspend (); |
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144 | } |
183 | |
145 | |
184 | /** This sets up the socket and reads all the image information into memory. */ |
146 | /** This sets up the socket and reads all the image information into memory. */ |
185 | void |
147 | void |
186 | init_ericserver (void) |
148 | init_ericserver (void) |
187 | { |
149 | { |
188 | struct sockaddr_in insock; |
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189 | struct protoent *protox; |
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190 | struct linger linger_opt; |
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191 | |
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192 | #ifdef WIN32 /* ***win32 - we init a windows socket */ |
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193 | WSADATA w; |
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194 | |
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195 | socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */ |
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196 | WSAStartup (0x0101, &w); /* this setup all socket stuff */ |
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197 | /* ill include no error tests here, winsocket 1.1 should always work */ |
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198 | /* except some old win95 versions without tcp/ip stack */ |
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199 | #else /* non windows */ |
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200 | |
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201 | # ifdef HAVE_SYSCONF |
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202 | socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
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203 | # else |
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204 | # ifdef HAVE_GETDTABLESIZE |
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205 | socket_info.max_filedescriptor = getdtablesize (); |
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206 | # else |
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207 | "Unable to find usable function to get max filedescriptors"; |
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208 | # endif |
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209 | # endif |
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210 | #endif /* win32 */ |
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211 | |
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212 | socket_info.timeout.tv_sec = 0; |
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213 | socket_info.timeout.tv_usec = 0; |
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214 | socket_info.nconns = 0; |
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215 | |
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216 | #ifdef CS_LOGSTATS |
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217 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
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218 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
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219 | cst_tot.time_start = time (NULL); |
150 | cst_tot.time_start = time (NULL); |
220 | cst_lst.time_start = time (NULL); |
151 | cst_lst.time_start = time (NULL); |
221 | #endif |
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222 | |
152 | |
223 | LOG (llevDebug, "Initialize new client/server data\n"); |
153 | LOG (llevDebug, "Initialize new client/server data\n"); |
224 | socket_info.nconns = 1; |
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225 | init_sockets = (NewSocket *) malloc (sizeof (NewSocket)); |
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226 | init_sockets[0].faces_sent = NULL; /* unused */ |
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227 | socket_info.allocated_sockets = 1; |
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228 | |
154 | |
229 | protox = getprotobyname ("tcp"); |
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230 | if (protox == NULL) |
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231 | { |
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232 | LOG (llevError, "init_ericserver: Error getting protox\n"); |
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233 | return; |
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234 | } |
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235 | init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
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236 | if (init_sockets[0].fd == -1) |
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237 | { |
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238 | LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
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239 | exit (-1); |
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240 | } |
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241 | insock.sin_family = AF_INET; |
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242 | insock.sin_port = htons (settings.csport); |
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243 | insock.sin_addr.s_addr = htonl (INADDR_ANY); |
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244 | |
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245 | linger_opt.l_onoff = 0; |
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246 | linger_opt.l_linger = 0; |
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247 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
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248 | { |
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249 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
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250 | } |
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251 | |
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252 | /* Would be nice to have an autoconf check for this. It appears that |
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253 | * these functions are both using the same calling syntax, just one |
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254 | * of them needs extra valus passed. |
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255 | */ |
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256 | #if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \ |
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257 | defined(__sun__) || defined(__linux__) || defined(SVR4) || \ |
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258 | defined(__FreeBSD__) || defined(__OpenBSD__) || \ |
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259 | defined(WIN32) /* ---win32 add this here */ || \ |
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260 | defined(__GNU__) /* HURD */ |
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261 | { |
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262 | # ifdef WIN32 |
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263 | char tmp = 1; |
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264 | # else |
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265 | int tmp = 1; |
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266 | # endif |
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267 | |
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268 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
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269 | { |
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270 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
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271 | } |
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272 | } |
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273 | #else |
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274 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0)) |
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275 | { |
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276 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
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277 | } |
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278 | #endif |
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279 | |
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280 | if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
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281 | { |
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282 | LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
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283 | #ifdef WIN32 /* ***win32: close() -> closesocket() */ |
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284 | shutdown (init_sockets[0].fd, SD_BOTH); |
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285 | closesocket (init_sockets[0].fd); |
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286 | #else |
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287 | close (init_sockets[0].fd); |
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288 | #endif /* win32 */ |
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289 | exit (-1); |
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290 | } |
|
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291 | if (listen (init_sockets[0].fd, 5) == (-1)) |
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292 | { |
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293 | LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
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294 | #ifdef WIN32 /* ***win32: close() -> closesocket() */ |
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295 | shutdown (init_sockets[0].fd, SD_BOTH); |
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296 | closesocket (init_sockets[0].fd); |
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297 | #else |
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298 | close (init_sockets[0].fd); |
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299 | #endif /* win32 */ |
|
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300 | exit (-1); |
|
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301 | } |
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302 | init_sockets[0].status = Ns_Add; |
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303 | read_client_images (); |
155 | read_client_images (); |
304 | } |
156 | } |
305 | |
157 | |
306 | |
158 | |
307 | /******************************************************************************* |
159 | /******************************************************************************* |
… | |
… | |
314 | void |
166 | void |
315 | free_all_newserver (void) |
167 | free_all_newserver (void) |
316 | { |
168 | { |
317 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
169 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
318 | free_socket_images (); |
170 | free_socket_images (); |
319 | free (init_sockets); |
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320 | } |
|
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321 | |
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322 | /** |
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323 | * Frees a socket. |
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324 | * Basically, all we need to do here is free all data structures that |
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325 | * might be associated with the socket. It is up to the caller to |
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326 | * update the list |
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327 | */ |
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328 | |
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329 | void |
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330 | free_newsocket (NewSocket * ns) |
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331 | { |
|
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332 | #ifdef WIN32 /* ***win32: closesocket in windows style */ |
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333 | shutdown (ns->fd, SD_BOTH); |
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334 | if (closesocket (ns->fd)) |
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335 | { |
|
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336 | #else |
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337 | if (close (ns->fd)) |
|
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338 | { |
|
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339 | #endif /* win32 */ |
|
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340 | |
|
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341 | #ifdef ESRV_DEBUG |
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342 | LOG (llevDebug, "Error closing socket %d\n", ns->fd); |
|
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343 | #endif |
|
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344 | } |
|
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345 | if (ns->stats.range) |
|
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346 | free (ns->stats.range); |
|
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347 | if (ns->stats.title) |
|
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348 | free (ns->stats.title); |
|
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349 | if (ns->comment) |
|
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350 | free (ns->comment); |
|
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351 | free (ns->host); |
|
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352 | free (ns->inbuf.buf); |
|
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353 | } |
171 | } |
354 | |
172 | |
355 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
173 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
356 | void |
174 | void |
357 | final_free_player (player *pl) |
175 | final_free_player (player *pl) |
358 | { |
176 | { |
359 | cs_write_string (&pl->socket, "goodbye", 8); |
|
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360 | free_newsocket (&pl->socket); |
|
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361 | free_player (pl); |
177 | free_player (pl); |
362 | } |
178 | } |
|
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179 | |
|
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180 | bool |
|
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181 | add_client (int fd, const char *peername) |
|
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182 | { |
|
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183 | if (checkbanned (NULL, peername)) |
|
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184 | { |
|
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185 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
|
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186 | return false; |
|
|
187 | } |
|
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188 | else |
|
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189 | { |
|
|
190 | client *ns = new client (dup (fd), peername); |
|
|
191 | clients.push_back (ns); |
|
|
192 | return true; |
|
|
193 | } |
|
|
194 | } |
|
|
195 | |