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/* |
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* static char *rcsid_init_c = |
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* "$Id: init.c,v 1.47 2006/03/14 17:12:28 ryo_saeba Exp $"; |
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*/ |
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|
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/* |
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CrossFire, A Multiplayer game for X-windows |
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|
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Copyright (C) 2001 Mark Wedel |
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Copyright (C) 1992 Frank Tore Johansen |
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|
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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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|
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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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|
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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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|
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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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/** |
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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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|
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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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|
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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|
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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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|
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Socket_Info socket_info; |
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NewSocket *init_sockets; |
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|
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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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|
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#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */ |
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int temp = 1; |
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|
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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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|
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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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|
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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; |
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ns->monitor_spells = 0; |
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|
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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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*/ |
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ns->faces_sent[0] = NS_FACESENT_FACE; |
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|
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ns->outputbuffer.start=0; |
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ns->outputbuffer.len=0; |
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ns->can_write=1; |
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ns->password_fails = 0; |
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|
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ns->sent_scroll=0; |
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ns->host=strdup_local(from_ip); |
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sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO); |
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sl.buf=buf; |
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sl.len=strlen((char*)buf); |
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Send_With_Handling(ns, &sl); |
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#ifdef CS_LOGSTATS |
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if (socket_info.nconns>cst_tot.max_conn) |
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cst_tot.max_conn = socket_info.nconns; |
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if (socket_info.nconns>cst_lst.max_conn) |
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cst_lst.max_conn = socket_info.nconns; |
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#endif |
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} |
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|
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|
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/** This sets up the socket and reads all the image information into memory. */ |
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void init_ericserver(void) |
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{ |
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struct sockaddr_in insock; |
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struct protoent *protox; |
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struct linger linger_opt; |
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|
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#ifdef WIN32 /* ***win32 - we init a windows socket */ |
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WSADATA w; |
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|
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socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */ |
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WSAStartup (0x0101,&w); /* this setup all socket stuff */ |
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/* ill include no error tests here, winsocket 1.1 should always work */ |
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/* except some old win95 versions without tcp/ip stack */ |
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#else /* non windows */ |
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|
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#ifdef HAVE_SYSCONF |
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socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX); |
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#else |
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# ifdef HAVE_GETDTABLESIZE |
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socket_info.max_filedescriptor = getdtablesize(); |
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# else |
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"Unable to find usable function to get max filedescriptors"; |
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# endif |
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#endif |
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#endif /* win32 */ |
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|
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socket_info.timeout.tv_sec = 0; |
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socket_info.timeout.tv_usec = 0; |
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socket_info.nconns=0; |
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|
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#ifdef CS_LOGSTATS |
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memset(&cst_tot, 0, sizeof(CS_Stats)); |
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memset(&cst_lst, 0, sizeof(CS_Stats)); |
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cst_tot.time_start=time(NULL); |
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cst_lst.time_start=time(NULL); |
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#endif |
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|
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LOG(llevDebug,"Initialize new client/server data\n"); |
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socket_info.nconns = 1; |
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init_sockets = malloc(sizeof(NewSocket)); |
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init_sockets[0].faces_sent = NULL; /* unused */ |
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socket_info.allocated_sockets=1; |
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|
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protox = getprotobyname("tcp"); |
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if (protox==NULL) { |
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LOG(llevError,"init_ericserver: Error getting protox\n"); |
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return; |
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} |
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init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto); |
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if (init_sockets[0].fd == -1) { |
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LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno)); |
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exit(-1); |
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} |
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insock.sin_family = AF_INET; |
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insock.sin_port = htons(settings.csport); |
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insock.sin_addr.s_addr = htonl(INADDR_ANY); |
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|
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linger_opt.l_onoff = 0; |
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linger_opt.l_linger = 0; |
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if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, |
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sizeof(struct linger))) { |
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LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno)); |
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} |
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/* Would be nice to have an autoconf check for this. It appears that |
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* these functions are both using the same calling syntax, just one |
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* of them needs extra valus passed. |
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*/ |
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#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \ |
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defined(__sun__) || defined(__linux__) || defined(SVR4) || \ |
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defined(__FreeBSD__) || defined(__OpenBSD__) || \ |
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defined(WIN32) /* ---win32 add this here */ || \ |
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defined(__GNU__) /* HURD */ |
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{ |
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#ifdef WIN32 |
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char tmp = 1; |
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#else |
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int tmp =1; |
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#endif |
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|
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if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { |
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LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); |
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} |
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} |
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#else |
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if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) { |
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LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); |
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} |
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#endif |
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|
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if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) { |
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LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno)); |
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#ifdef WIN32 /* ***win32: close() -> closesocket() */ |
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shutdown(init_sockets[0].fd,SD_BOTH); |
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closesocket(init_sockets[0].fd); |
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#else |
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close(init_sockets[0].fd); |
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#endif /* win32 */ |
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exit(-1); |
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} |
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if (listen(init_sockets[0].fd,5) == (-1)) { |
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LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno)); |
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#ifdef WIN32 /* ***win32: close() -> closesocket() */ |
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shutdown(init_sockets[0].fd,SD_BOTH); |
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closesocket(init_sockets[0].fd); |
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#else |
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close(init_sockets[0].fd); |
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#endif /* win32 */ |
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exit(-1); |
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} |
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init_sockets[0].status=Ns_Add; |
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read_client_images(); |
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} |
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|
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|
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/******************************************************************************* |
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* |
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* Start of functions dealing with freeing of the data. |
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* |
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******************************************************************************/ |
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|
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/** Free's all the memory that ericserver allocates. */ |
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void free_all_newserver(void) |
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{ |
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LOG(llevDebug,"Freeing all new client/server information.\n"); |
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free_socket_images(); |
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free(init_sockets); |
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} |
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|
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/** |
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* Frees a socket. |
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* Basically, all we need to do here is free all data structures that |
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* might be associated with the socket. It is up to the caller to |
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* update the list |
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*/ |
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|
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void free_newsocket(NewSocket *ns) |
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{ |
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#ifdef WIN32 /* ***win32: closesocket in windows style */ |
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shutdown(ns->fd,SD_BOTH); |
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if (closesocket(ns->fd)) { |
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#else |
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if (close(ns->fd)) { |
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#endif /* win32 */ |
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|
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#ifdef ESRV_DEBUG |
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LOG(llevDebug,"Error closing socket %d\n", ns->fd); |
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#endif |
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} |
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if (ns->stats.range) |
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free(ns->stats.range); |
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if (ns->stats.title) |
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free(ns->stats.title); |
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if (ns->comment) |
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free(ns->comment); |
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free(ns->host); |
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free(ns->inbuf.buf); |
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} |
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|
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/** Sends the 'goodbye' command to the player, and closes connection. */ |
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void final_free_player(player *pl) |
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{ |
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cs_write_string(&pl->socket, "goodbye", 8); |
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free_newsocket(&pl->socket); |
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free_player(pl); |
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} |
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|
