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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@schmorp.de> |
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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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#include <sproto.h> |
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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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|
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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 |
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InitConnection (NewSocket *ns, const char *from_ip) |
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{ |
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SockList sl; |
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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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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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if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
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oldbufsize = 0; |
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|
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if (oldbufsize < bufsize) |
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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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buflen = sizeof (oldbufsize); |
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getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & 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->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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ns->mapinfocmd = 0; |
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ns->extcmd = 0; |
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ns->extmap = 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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|
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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->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->current_map = 0; |
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ns->current_x = 0; |
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ns->current_y = 0; |
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ns->client[0] = 0; |
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ns->buggy_mapscroll = 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 = (unsigned char *) 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 |
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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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socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
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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 = (NewSocket *) 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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{ |
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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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|
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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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{ |
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LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
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exit (-1); |
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} |
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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, sizeof (struct linger))) |
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LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
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|
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{ |
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int tmp = 1; |
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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 (errno)); |
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} |
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|
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if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
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{ |
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LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
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close (init_sockets[0].fd); |
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exit (-1); |
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} |
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|
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if (listen (init_sockets[0].fd, 5) == (-1)) |
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{ |
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LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
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close (init_sockets[0].fd); |
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exit (-1); |
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} |
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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 |
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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 |
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free_newsocket (NewSocket *ns) |
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{ |
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close (ns->fd); |
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|
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if (ns->stats.range) |
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free (ns->stats.range); |
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|
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if (ns->stats.title) |
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free (ns->stats.title); |
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|
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free (ns->host); |
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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 |
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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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} |
