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root |
1.1 |
/* |
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* static char *rcsid_init_c = |
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elmex |
1.1.1.2 |
* "$Id: init.c,v 1.47 2006/03/14 17:12:28 ryo_saeba Exp $"; |
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root |
1.1 |
*/ |
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/* |
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CrossFire, A Multiplayer game for X-windows |
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Copyright (C) 2001 Mark Wedel |
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Copyright (C) 1992 Frank Tore Johansen |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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The author can be reached via e-mail to crossfire-devel@real-time.com |
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*/ |
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/** |
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* \file |
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* Socket general functions |
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* |
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* \date 2003-12-02 |
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* |
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* Mainly deals with initialization and higher level socket |
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* maintenance (checking for lost connections and if data has arrived.) |
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* The reading of data is handled in ericserver.c |
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*/ |
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#include <global.h> |
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#ifndef __CEXTRACT__ |
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#include <sproto.h> |
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#endif |
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#ifndef WIN32 /* ---win32 exclude include files */ |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netdb.h> |
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#endif /* win32 */ |
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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#ifdef HAVE_ARPA_INET_H |
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#include <arpa/inet.h> |
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#endif |
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#include <newserver.h> |
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Socket_Info socket_info; |
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NewSocket *init_sockets; |
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/** |
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* Initializes a connection. Really, it just sets up the data structure, |
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* socket setup is handled elsewhere. We do send a version to the |
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* client. |
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*/ |
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void InitConnection(NewSocket *ns, const char *from_ip) |
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{ |
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SockList sl; |
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unsigned char buf[256]; |
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int bufsize=65535; /*Supposed absolute upper limit */ |
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int oldbufsize; |
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int buflen=sizeof(int); |
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#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */ |
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int temp = 1; |
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if(ioctlsocket(ns->fd, FIONBIO , &temp) == -1) |
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LOG(llevError,"InitConnection: Error on ioctlsocket.\n"); |
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#else |
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if (fcntl(ns->fd, F_SETFL, O_NONBLOCK)==-1) { |
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LOG(llevError,"InitConnection: Error on fcntl.\n"); |
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} |
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#endif /* end win32 */ |
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if (getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, &buflen)==-1) |
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oldbufsize=0; |
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if (oldbufsize<bufsize) { |
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#ifdef ESRV_DEBUG |
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LOG(llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize); |
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#endif |
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if(setsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&bufsize, sizeof(&bufsize))) { |
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LOG(llevError,"InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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} |
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} |
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buflen=sizeof(oldbufsize); |
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getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, &buflen); |
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#ifdef ESRV_DEBUG |
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LOG(llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
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#endif |
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ns->faceset = 0; |
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ns->facecache = 0; |
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ns->image2 = 0; |
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ns->sound = 0; |
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ns->exp64 = 0; |
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ns->monitor_spells = 0; |
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ns->mapmode = Map0Cmd; |
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ns->darkness = 1; |
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ns->status = Ns_Add; |
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ns->comment = NULL; |
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ns->old_mode = 0; |
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ns->mapx = 11; |
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ns->mapy = 11; |
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ns->newmapcmd= 0; |
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ns->itemcmd = 1; /* Default is version item1 command*/ |
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ns->ext_mapinfos=0; /*extendedmapinfo datas*/ |
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ns->EMI_smooth=0; |
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ns->look_position = 0; |
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ns->update_look = 0; |
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ns->has_readable_type = 0; |
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ns->supported_readables = 0; |
126 |
elmex |
1.1.1.2 |
ns->monitor_spells = 0; |
127 |
root |
1.1 |
|
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/* we should really do some checking here - if total clients overflows |
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* we need to do something more intelligent, because client id's will start |
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* duplicating (not likely in normal cases, but malicous attacks that |
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* just open and close connections could get this total up. |
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*/ |
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ns->inbuf.len=0; |
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ns->inbuf.buf=malloc( sizeof( unsigned char ) * MAXSOCKBUF ); |
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/* Basic initialization. Needed because we do a check in |
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* HandleClient for oldsocketmode without checking the |
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* length of data. |
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*/ |
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memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF ); |
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memset(&ns->lastmap,0,sizeof(struct Map)); |
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memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent)); |
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memset(&ns->anims_sent,0,sizeof(ns->anims_sent)); |
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memset(&ns->stats,0,sizeof(struct statsinfo)); |
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/* Do this so we don't send a face command for the client for |
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* this face. Face 0 is sent to the client to say clear |
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* face information. |
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*/ |
148 |
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ns->faces_sent[0] = NS_FACESENT_FACE; |
149 |
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150 |
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ns->outputbuffer.start=0; |
151 |
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ns->outputbuffer.len=0; |
152 |
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ns->can_write=1; |
153 |
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ns->password_fails = 0; |
154 |
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155 |
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ns->sent_scroll=0; |
156 |
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ns->host=strdup_local(from_ip); |
157 |
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sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO); |
158 |
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sl.buf=buf; |
159 |
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sl.len=strlen((char*)buf); |
160 |
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Send_With_Handling(ns, &sl); |
161 |
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#ifdef CS_LOGSTATS |
162 |
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if (socket_info.nconns>cst_tot.max_conn) |
163 |
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cst_tot.max_conn = socket_info.nconns; |
164 |
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if (socket_info.nconns>cst_lst.max_conn) |
165 |
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cst_lst.max_conn = socket_info.nconns; |
166 |
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#endif |
167 |
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} |
168 |
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169 |
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170 |
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/** This sets up the socket and reads all the image information into memory. */ |
171 |
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void init_ericserver(void) |
172 |
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{ |
173 |
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struct sockaddr_in insock; |
174 |
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struct protoent *protox; |
175 |
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struct linger linger_opt; |
176 |
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177 |
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#ifdef WIN32 /* ***win32 - we init a windows socket */ |
178 |
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WSADATA w; |
179 |
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180 |
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socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */ |
181 |
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WSAStartup (0x0101,&w); /* this setup all socket stuff */ |
182 |
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/* ill include no error tests here, winsocket 1.1 should always work */ |
183 |
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/* except some old win95 versions without tcp/ip stack */ |
184 |
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#else /* non windows */ |
185 |
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186 |
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#ifdef HAVE_SYSCONF |
187 |
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socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX); |
188 |
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#else |
189 |
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# ifdef HAVE_GETDTABLESIZE |
190 |
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socket_info.max_filedescriptor = getdtablesize(); |
191 |
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# else |
192 |
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"Unable to find usable function to get max filedescriptors"; |
193 |
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# endif |
194 |
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#endif |
195 |
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#endif /* win32 */ |
196 |
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197 |
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socket_info.timeout.tv_sec = 0; |
198 |
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socket_info.timeout.tv_usec = 0; |
199 |
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socket_info.nconns=0; |
200 |
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201 |
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#ifdef CS_LOGSTATS |
202 |
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memset(&cst_tot, 0, sizeof(CS_Stats)); |
203 |
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memset(&cst_lst, 0, sizeof(CS_Stats)); |
204 |
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cst_tot.time_start=time(NULL); |
205 |
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cst_lst.time_start=time(NULL); |
206 |
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#endif |
207 |
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208 |
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LOG(llevDebug,"Initialize new client/server data\n"); |
209 |
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socket_info.nconns = 1; |
210 |
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init_sockets = malloc(sizeof(NewSocket)); |
211 |
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init_sockets[0].faces_sent = NULL; /* unused */ |
212 |
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socket_info.allocated_sockets=1; |
213 |
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214 |
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protox = getprotobyname("tcp"); |
215 |
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if (protox==NULL) { |
216 |
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LOG(llevError,"init_ericserver: Error getting protox\n"); |
217 |
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return; |
218 |
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} |
219 |
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init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto); |
220 |
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if (init_sockets[0].fd == -1) { |
221 |
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LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno)); |
222 |
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exit(-1); |
223 |
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} |
224 |
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insock.sin_family = AF_INET; |
225 |
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insock.sin_port = htons(settings.csport); |
226 |
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insock.sin_addr.s_addr = htonl(INADDR_ANY); |
227 |
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228 |
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linger_opt.l_onoff = 0; |
229 |
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linger_opt.l_linger = 0; |
230 |
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if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, |
231 |
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sizeof(struct linger))) { |
232 |
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LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno)); |
233 |
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} |
234 |
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/* Would be nice to have an autoconf check for this. It appears that |
235 |
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* these functions are both using the same calling syntax, just one |
236 |
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* of them needs extra valus passed. |
237 |
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*/ |
238 |
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#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \ |
239 |
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defined(__sun__) || defined(__linux__) || defined(SVR4) || \ |
240 |
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defined(__FreeBSD__) || defined(__OpenBSD__) || \ |
241 |
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defined(WIN32) /* ---win32 add this here */ || \ |
242 |
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defined(__GNU__) /* HURD */ |
243 |
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{ |
244 |
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#ifdef WIN32 |
245 |
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char tmp = 1; |
246 |
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#else |
247 |
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int tmp =1; |
248 |
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#endif |
249 |
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250 |
|
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if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { |
251 |
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LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); |
252 |
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} |
253 |
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} |
254 |
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#else |
255 |
|
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if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) { |
256 |
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LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); |
257 |
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} |
258 |
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#endif |
259 |
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260 |
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if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) { |
261 |
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LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno)); |
262 |
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#ifdef WIN32 /* ***win32: close() -> closesocket() */ |
263 |
|
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shutdown(init_sockets[0].fd,SD_BOTH); |
264 |
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closesocket(init_sockets[0].fd); |
265 |
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#else |
266 |
|
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close(init_sockets[0].fd); |
267 |
|
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#endif /* win32 */ |
268 |
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exit(-1); |
269 |
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} |
270 |
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if (listen(init_sockets[0].fd,5) == (-1)) { |
271 |
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LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno)); |
272 |
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#ifdef WIN32 /* ***win32: close() -> closesocket() */ |
273 |
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shutdown(init_sockets[0].fd,SD_BOTH); |
274 |
|
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closesocket(init_sockets[0].fd); |
275 |
|
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#else |
276 |
|
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close(init_sockets[0].fd); |
277 |
|
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#endif /* win32 */ |
278 |
|
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exit(-1); |
279 |
|
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} |
280 |
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init_sockets[0].status=Ns_Add; |
281 |
|
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read_client_images(); |
282 |
|
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} |
283 |
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284 |
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|
285 |
|
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/******************************************************************************* |
286 |
|
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* |
287 |
|
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* Start of functions dealing with freeing of the data. |
288 |
|
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* |
289 |
|
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******************************************************************************/ |
290 |
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291 |
|
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/** Free's all the memory that ericserver allocates. */ |
292 |
|
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void free_all_newserver(void) |
293 |
|
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{ |
294 |
|
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LOG(llevDebug,"Freeing all new client/server information.\n"); |
295 |
|
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free_socket_images(); |
296 |
|
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free(init_sockets); |
297 |
|
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} |
298 |
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|
299 |
|
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/** |
300 |
|
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* Frees a socket. |
301 |
|
|
* Basically, all we need to do here is free all data structures that |
302 |
|
|
* might be associated with the socket. It is up to the caller to |
303 |
|
|
* update the list |
304 |
|
|
*/ |
305 |
|
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|
306 |
|
|
void free_newsocket(NewSocket *ns) |
307 |
|
|
{ |
308 |
|
|
#ifdef WIN32 /* ***win32: closesocket in windows style */ |
309 |
|
|
shutdown(ns->fd,SD_BOTH); |
310 |
|
|
if (closesocket(ns->fd)) { |
311 |
|
|
#else |
312 |
|
|
if (close(ns->fd)) { |
313 |
|
|
#endif /* win32 */ |
314 |
|
|
|
315 |
|
|
#ifdef ESRV_DEBUG |
316 |
|
|
LOG(llevDebug,"Error closing socket %d\n", ns->fd); |
317 |
|
|
#endif |
318 |
|
|
} |
319 |
|
|
if (ns->stats.range) |
320 |
|
|
free(ns->stats.range); |
321 |
|
|
if (ns->stats.title) |
322 |
|
|
free(ns->stats.title); |
323 |
|
|
if (ns->comment) |
324 |
|
|
free(ns->comment); |
325 |
|
|
free(ns->host); |
326 |
|
|
free(ns->inbuf.buf); |
327 |
|
|
} |
328 |
|
|
|
329 |
|
|
/** Sends the 'goodbye' command to the player, and closes connection. */ |
330 |
|
|
void final_free_player(player *pl) |
331 |
|
|
{ |
332 |
|
|
cs_write_string(&pl->socket, "goodbye", 8); |
333 |
|
|
free_newsocket(&pl->socket); |
334 |
|
|
free_player(pl); |
335 |
|
|
} |
336 |
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|