1 | /* |
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2 | * static char *rcsid_init_c = |
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3 | * "$Id: init.C,v 1.3 2006/08/18 02:06:58 root Exp $"; |
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4 | */ |
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5 | |
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6 | /* |
1 | /* |
7 | CrossFire, A Multiplayer game for X-windows |
2 | CrossFire, A Multiplayer game for X-windows |
8 | |
3 | |
9 | Copyright (C) 2001 Mark Wedel |
4 | Copyright (C) 2001 Mark Wedel |
10 | Copyright (C) 1992 Frank Tore Johansen |
5 | Copyright (C) 1992 Frank Tore Johansen |
… | |
… | |
21 | |
16 | |
22 | 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 |
23 | along with this program; if not, write to the Free Software |
18 | along with this program; if not, write to the Free Software |
24 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | |
20 | |
26 | 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> |
27 | */ |
22 | */ |
28 | |
23 | |
29 | /** |
24 | /** |
30 | * \file |
25 | * \file |
31 | * Socket general functions |
26 | * Socket general functions |
… | |
… | |
35 | * Mainly deals with initialization and higher level socket |
30 | * Mainly deals with initialization and higher level socket |
36 | * maintenance (checking for lost connections and if data has arrived.) |
31 | * maintenance (checking for lost connections and if data has arrived.) |
37 | * The reading of data is handled in ericserver.c |
32 | * The reading of data is handled in ericserver.c |
38 | */ |
33 | */ |
39 | |
34 | |
40 | |
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41 | #include <global.h> |
35 | #include <global.h> |
42 | #ifndef __CEXTRACT__ |
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43 | #include <sproto.h> |
36 | #include <sproto.h> |
44 | #endif |
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45 | #ifndef WIN32 /* ---win32 exclude include files */ |
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46 | #include <sys/types.h> |
37 | #include <sys/types.h> |
47 | #include <sys/time.h> |
38 | #include <sys/time.h> |
48 | #include <sys/socket.h> |
39 | #include <sys/socket.h> |
49 | #include <netinet/in.h> |
40 | #include <netinet/in.h> |
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41 | #include <netinet/tcp.h> |
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42 | #include <netinet/ip.h> |
50 | #include <netdb.h> |
43 | #include <netdb.h> |
51 | #endif /* win32 */ |
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52 | |
44 | |
53 | #ifdef HAVE_UNISTD_H |
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54 | #include <unistd.h> |
45 | #include <unistd.h> |
55 | #endif |
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56 | |
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57 | #ifdef HAVE_ARPA_INET_H |
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58 | #include <arpa/inet.h> |
46 | #include <arpa/inet.h> |
59 | #endif |
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60 | #include <newserver.h> |
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61 | |
47 | |
62 | Socket_Info socket_info; |
48 | #include <algorithm> |
63 | NewSocket *init_sockets; |
49 | |
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50 | sockvec clients; |
64 | |
51 | |
65 | /** |
52 | /** |
66 | * Initializes a connection. Really, it just sets up the data structure, |
53 | * Initializes a connection. Really, it just sets up the data structure, |
67 | * socket setup is handled elsewhere. We do send a version to the |
54 | * socket setup is handled elsewhere. We do send a version to the |
68 | * client. |
55 | * client. |
69 | */ |
56 | */ |
70 | void InitConnection(NewSocket *ns, const char *from_ip) |
57 | client::client (int fd, const char *peername) |
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58 | : fd (fd), host (strdup (peername)), |
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59 | socket_ev (this, &client::socket_cb), |
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60 | cmd_ev (this, &client::cmd_cb), |
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61 | cc_inv (this), cc_other (this) |
71 | { |
62 | { |
72 | SockList sl; |
63 | { |
73 | char buf[256]; |
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74 | int bufsize=65535; /*Supposed absolute upper limit */ |
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75 | int oldbufsize; |
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76 | int buflen=sizeof(int); |
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77 | |
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78 | #ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */ |
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79 | int temp = 1; |
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80 | |
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81 | if(ioctlsocket(ns->fd, FIONBIO , &temp) == -1) |
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82 | LOG(llevError,"InitConnection: Error on ioctlsocket.\n"); |
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83 | #else |
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84 | if (fcntl(ns->fd, F_SETFL, O_NONBLOCK)==-1) { |
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85 | LOG(llevError,"InitConnection: Error on fcntl.\n"); |
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86 | } |
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87 | #endif /* end win32 */ |
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88 | |
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89 | if (getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, (socklen_t*) &buflen)==-1) |
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90 | oldbufsize=0; |
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91 | if (oldbufsize<bufsize) { |
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92 | #ifdef ESRV_DEBUG |
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93 | LOG(llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize); |
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94 | #endif |
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95 | if(setsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&bufsize, sizeof(&bufsize))) { |
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96 | LOG(llevError,"InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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97 | } |
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98 | } |
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99 | buflen=sizeof(oldbufsize); |
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100 | getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, (socklen_t*) &buflen); |
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101 | #ifdef ESRV_DEBUG |
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102 | LOG(llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
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103 | #endif |
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104 | |
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105 | ns->faceset = 0; |
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106 | ns->facecache = 0; |
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107 | ns->image2 = 0; |
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108 | ns->sound = 0; |
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109 | ns->exp64 = 0; |
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110 | ns->monitor_spells = 0; |
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111 | ns->mapmode = Map0Cmd; |
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112 | ns->darkness = 1; |
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113 | ns->status = Ns_Add; |
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114 | ns->comment = NULL; |
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115 | ns->old_mode = (Old_Mode) 0; |
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116 | ns->mapx = 11; |
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117 | ns->mapy = 11; |
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118 | ns->newmapcmd= 0; |
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119 | ns->itemcmd = 1; /* Default is version item1 command*/ |
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120 | ns->ext_mapinfos=0; /*extendedmapinfo datas*/ |
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121 | ns->EMI_smooth=0; |
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122 | ns->look_position = 0; |
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123 | ns->update_look = 0; |
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124 | ns->has_readable_type = 0; |
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125 | ns->supported_readables = 0; |
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126 | ns->monitor_spells = 0; |
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127 | ns->mapinfocmd = 0; |
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128 | ns->extcmd = 0; |
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129 | ns->extmap = 0; |
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130 | |
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131 | /* we should really do some checking here - if total clients overflows |
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132 | * we need to do something more intelligent, because client id's will start |
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133 | * duplicating (not likely in normal cases, but malicous attacks that |
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134 | * just open and close connections could get this total up. |
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135 | */ |
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136 | ns->inbuf.len=0; |
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137 | ns->inbuf.buf= (unsigned char*) malloc( sizeof( unsigned char ) * MAXSOCKBUF ); |
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138 | /* Basic initialization. Needed because we do a check in |
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139 | * HandleClient for oldsocketmode without checking the |
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140 | * length of data. |
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141 | */ |
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142 | memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF ); |
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143 | memset(&ns->lastmap,0,sizeof(struct Map)); |
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144 | memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent)); |
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145 | memset(&ns->anims_sent,0,sizeof(ns->anims_sent)); |
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146 | memset(&ns->stats,0,sizeof(struct statsinfo)); |
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147 | /* Do this so we don't send a face command for the client for |
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148 | * this face. Face 0 is sent to the client to say clear |
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149 | * face information. |
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150 | */ |
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151 | ns->faces_sent[0] = NS_FACESENT_FACE; |
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152 | |
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153 | ns->outputbuffer.start=0; |
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154 | ns->outputbuffer.len=0; |
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155 | ns->can_write=1; |
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156 | ns->password_fails = 0; |
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157 | |
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158 | ns->current_map = 0; |
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159 | ns->current_x = 0; |
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160 | ns->current_y = 0; |
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161 | |
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162 | ns->sent_scroll=0; |
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163 | ns->host=strdup_local(from_ip); |
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164 | sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO); |
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165 | sl.buf=(unsigned char*)buf; |
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166 | sl.len=strlen((char*)buf); |
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167 | Send_With_Handling(ns, &sl); |
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168 | #ifdef CS_LOGSTATS |
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169 | if (socket_info.nconns>cst_tot.max_conn) |
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170 | cst_tot.max_conn = socket_info.nconns; |
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171 | if (socket_info.nconns>cst_lst.max_conn) |
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172 | cst_lst.max_conn = socket_info.nconns; |
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173 | #endif |
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174 | } |
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175 | |
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176 | |
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177 | /** This sets up the socket and reads all the image information into memory. */ |
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178 | void init_ericserver(void) |
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179 | { |
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180 | struct sockaddr_in insock; |
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181 | struct protoent *protox; |
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182 | struct linger linger_opt; |
64 | struct linger linger_opt; |
183 | |
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184 | #ifdef WIN32 /* ***win32 - we init a windows socket */ |
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185 | WSADATA w; |
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186 | |
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187 | socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */ |
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188 | WSAStartup (0x0101,&w); /* this setup all socket stuff */ |
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189 | /* ill include no error tests here, winsocket 1.1 should always work */ |
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190 | /* except some old win95 versions without tcp/ip stack */ |
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191 | #else /* non windows */ |
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192 | |
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193 | #ifdef HAVE_SYSCONF |
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194 | socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX); |
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195 | #else |
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196 | # ifdef HAVE_GETDTABLESIZE |
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197 | socket_info.max_filedescriptor = getdtablesize(); |
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198 | # else |
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199 | "Unable to find usable function to get max filedescriptors"; |
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200 | # endif |
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201 | #endif |
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202 | #endif /* win32 */ |
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203 | |
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204 | socket_info.timeout.tv_sec = 0; |
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205 | socket_info.timeout.tv_usec = 0; |
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206 | socket_info.nconns=0; |
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207 | |
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208 | #ifdef CS_LOGSTATS |
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209 | memset(&cst_tot, 0, sizeof(CS_Stats)); |
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210 | memset(&cst_lst, 0, sizeof(CS_Stats)); |
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211 | cst_tot.time_start=time(NULL); |
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212 | cst_lst.time_start=time(NULL); |
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213 | #endif |
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214 | |
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215 | LOG(llevDebug,"Initialize new client/server data\n"); |
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216 | socket_info.nconns = 1; |
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217 | init_sockets = (NewSocket *) malloc(sizeof(NewSocket)); |
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218 | init_sockets[0].faces_sent = NULL; /* unused */ |
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219 | socket_info.allocated_sockets=1; |
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220 | |
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221 | protox = getprotobyname("tcp"); |
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222 | if (protox==NULL) { |
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223 | LOG(llevError,"init_ericserver: Error getting protox\n"); |
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224 | return; |
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225 | } |
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226 | init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto); |
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227 | if (init_sockets[0].fd == -1) { |
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228 | LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno)); |
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229 | exit(-1); |
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230 | } |
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231 | insock.sin_family = AF_INET; |
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232 | insock.sin_port = htons(settings.csport); |
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233 | insock.sin_addr.s_addr = htonl(INADDR_ANY); |
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234 | |
65 | |
235 | linger_opt.l_onoff = 0; |
66 | linger_opt.l_onoff = 0; |
236 | linger_opt.l_linger = 0; |
67 | linger_opt.l_linger = 0; |
237 | if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, |
68 | |
238 | sizeof(struct linger))) { |
69 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
239 | LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno)); |
70 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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71 | } |
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72 | |
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73 | { |
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74 | int val = IPTOS_LOWDELAY; |
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75 | |
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76 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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77 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
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78 | } |
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79 | |
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80 | { |
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81 | int val = 1; |
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82 | |
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83 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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84 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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85 | } |
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86 | |
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87 | #ifdef __linux__ |
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88 | { |
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89 | int val; |
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90 | |
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91 | // set some very aggressive keepalive parameters |
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92 | val = 10; |
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93 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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94 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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95 | |
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96 | val = 5; |
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97 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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98 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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99 | |
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100 | val = 1; |
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101 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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102 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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103 | } |
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104 | #endif |
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105 | |
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106 | { |
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107 | int bufsize = 65535; /*Supposed absolute upper limit */ |
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108 | int oldbufsize; |
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109 | int buflen = sizeof (int); |
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110 | |
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111 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
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112 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
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113 | |
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114 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
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115 | oldbufsize = 0; |
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116 | |
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117 | if (oldbufsize < bufsize) |
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118 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
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119 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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120 | |
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121 | buflen = sizeof (oldbufsize); |
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122 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
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123 | } |
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124 | |
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125 | state = ST_SETUP; |
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126 | mapmode = Map0Cmd; |
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127 | darkness = 1; |
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128 | mapx = 11; |
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129 | mapy = 11; |
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130 | itemcmd = 1; /* Default is version item1 command */ |
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131 | |
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132 | faces_sent = salloc0<uint8> (nrofpixmaps); |
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133 | |
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134 | /* Do this so we don't send a face command for the client for |
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135 | * this face. Face 0 is sent to the client to say clear |
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136 | * face information. |
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137 | */ |
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138 | faces_sent[0] = NS_FACESENT_FACE; |
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139 | |
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140 | // socket I/O is low priority |
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141 | // we prefer to have the server run instead of handling client requests |
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142 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
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143 | socket_ev.fd (fd); |
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144 | socket_ev.poll (PE_R); |
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145 | |
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146 | // command handling is even lower priority |
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147 | // that way no client can monopolise the server |
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148 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
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149 | |
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150 | // initialisation done, kick it! |
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151 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
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152 | flush (); |
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153 | |
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154 | // clients are externally referenced by the socket |
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155 | refcnt_inc (); |
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156 | clients.push_back (this); |
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157 | |
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158 | #if 0//TODO |
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159 | socket_info.nconns++; |
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160 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
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161 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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162 | #endif |
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163 | } |
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164 | |
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165 | client::~client () |
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166 | { |
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167 | sockvec::iterator i = find (clients.begin (), clients.end (), this); |
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168 | if (i != clients.end ()) |
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169 | clients.erase (i); |
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170 | |
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171 | sfree<uint8> (faces_sent, nrofpixmaps); |
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172 | free (stats.range); |
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173 | free (stats.title); |
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174 | free (host); |
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175 | } |
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176 | |
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177 | void |
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178 | client::do_destroy () |
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179 | { |
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180 | attachable::do_destroy (); |
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181 | |
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182 | if (pl) |
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183 | pl->disconnect (); |
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184 | |
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185 | if (fd >= 0) |
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186 | close (fd); |
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187 | |
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188 | state = ST_DEAD; |
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189 | |
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190 | socket_ev.suspend (); |
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191 | cmd_ev.suspend (); |
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192 | |
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193 | // socket now longer references us |
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194 | refcnt_dec (); |
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195 | } |
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196 | |
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197 | /** This sets up the socket and reads all the image information into memory. */ |
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198 | void |
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199 | init_ericserver (void) |
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200 | { |
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201 | cst_tot.time_start = time (NULL); |
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202 | cst_lst.time_start = time (NULL); |
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203 | |
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204 | LOG (llevDebug, "Initialize new client/server data\n"); |
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205 | |
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206 | read_client_images (); |
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207 | } |
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208 | |
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209 | |
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210 | /******************************************************************************* |
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211 | * |
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212 | * Start of functions dealing with freeing of the data. |
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213 | * |
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214 | ******************************************************************************/ |
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215 | |
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216 | /** Free's all the memory that ericserver allocates. */ |
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217 | void |
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218 | free_all_newserver (void) |
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219 | { |
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220 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
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221 | free_socket_images (); |
|
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222 | } |
|
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223 | |
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224 | client * |
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225 | client::create (int fd, const char *peername) |
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226 | { |
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227 | if (checkbanned (NULL, peername)) |
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228 | { |
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229 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
|
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230 | return 0; |
240 | } |
231 | } |
241 | /* Would be nice to have an autoconf check for this. It appears that |
232 | else |
242 | * these functions are both using the same calling syntax, just one |
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243 | * of them needs extra valus passed. |
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244 | */ |
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245 | #if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \ |
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246 | defined(__sun__) || defined(__linux__) || defined(SVR4) || \ |
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247 | defined(__FreeBSD__) || defined(__OpenBSD__) || \ |
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248 | defined(WIN32) /* ---win32 add this here */ || \ |
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249 | defined(__GNU__) /* HURD */ |
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250 | { |
233 | { |
251 | #ifdef WIN32 |
234 | client *ns = new client (dup (fd), peername); |
252 | char tmp = 1; |
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253 | #else |
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254 | int tmp =1; |
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255 | #endif |
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256 | |
235 | |
257 | if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { |
236 | ns->instantiate (); // effectively a nop right now |
258 | LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); |
237 | |
259 | } |
238 | INVOKE_CLIENT (CONNECT, ns); |
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239 | |
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240 | return ns; |
260 | } |
241 | } |
261 | #else |
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262 | if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) { |
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263 | LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); |
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264 | } |
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265 | #endif |
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266 | |
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267 | if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) { |
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268 | LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno)); |
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269 | #ifdef WIN32 /* ***win32: close() -> closesocket() */ |
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270 | shutdown(init_sockets[0].fd,SD_BOTH); |
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271 | closesocket(init_sockets[0].fd); |
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272 | #else |
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273 | close(init_sockets[0].fd); |
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274 | #endif /* win32 */ |
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275 | exit(-1); |
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276 | } |
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277 | if (listen(init_sockets[0].fd,5) == (-1)) { |
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278 | LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno)); |
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279 | #ifdef WIN32 /* ***win32: close() -> closesocket() */ |
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280 | shutdown(init_sockets[0].fd,SD_BOTH); |
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281 | closesocket(init_sockets[0].fd); |
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282 | #else |
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283 | close(init_sockets[0].fd); |
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284 | #endif /* win32 */ |
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285 | exit(-1); |
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286 | } |
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287 | init_sockets[0].status=Ns_Add; |
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288 | read_client_images(); |
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289 | } |
242 | } |
290 | |
243 | |
291 | |
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292 | /******************************************************************************* |
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293 | * |
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294 | * Start of functions dealing with freeing of the data. |
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295 | * |
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296 | ******************************************************************************/ |
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297 | |
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298 | /** Free's all the memory that ericserver allocates. */ |
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299 | void free_all_newserver(void) |
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300 | { |
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301 | LOG(llevDebug,"Freeing all new client/server information.\n"); |
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302 | free_socket_images(); |
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303 | free(init_sockets); |
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304 | } |
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305 | |
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306 | /** |
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307 | * Frees a socket. |
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308 | * Basically, all we need to do here is free all data structures that |
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309 | * might be associated with the socket. It is up to the caller to |
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310 | * update the list |
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311 | */ |
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312 | |
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313 | void free_newsocket(NewSocket *ns) |
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314 | { |
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315 | #ifdef WIN32 /* ***win32: closesocket in windows style */ |
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316 | shutdown(ns->fd,SD_BOTH); |
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317 | if (closesocket(ns->fd)) { |
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318 | #else |
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319 | if (close(ns->fd)) { |
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320 | #endif /* win32 */ |
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321 | |
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322 | #ifdef ESRV_DEBUG |
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323 | LOG(llevDebug,"Error closing socket %d\n", ns->fd); |
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324 | #endif |
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325 | } |
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326 | if (ns->stats.range) |
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327 | free(ns->stats.range); |
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328 | if (ns->stats.title) |
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329 | free(ns->stats.title); |
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330 | if (ns->comment) |
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331 | free(ns->comment); |
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332 | free(ns->host); |
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333 | free(ns->inbuf.buf); |
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334 | } |
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335 | |
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336 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
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337 | void final_free_player(player *pl) |
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338 | { |
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339 | cs_write_string(&pl->socket, "goodbye", 8); |
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340 | free_newsocket(&pl->socket); |
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341 | free_player(pl); |
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342 | } |
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343 | |
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