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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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#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 <netinet/tcp.h> |
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#include <netinet/ip.h> |
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#include <netdb.h> |
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|
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#include <unistd.h> |
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#include <arpa/inet.h> |
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|
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#include <algorithm> |
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|
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sockvec clients; |
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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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client::client (int fd, const char *peername) |
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: fd (fd), host (strdup (peername)), |
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socket_ev (this, &client::socket_cb), |
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cmd_ev (this, &client::cmd_cb), |
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cc_inv (this), cc_other (this) |
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{ |
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{ |
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struct linger linger_opt; |
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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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|
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if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
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LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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} |
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|
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{ |
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int val = IPTOS_LOWDELAY; |
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|
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if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
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} |
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|
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{ |
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int val = 1; |
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|
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if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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} |
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|
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#ifdef __linux__ |
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{ |
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int val; |
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|
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// set some very aggressive keepalive parameters |
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val = 10; |
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if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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|
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val = 5; |
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if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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|
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val = 1; |
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if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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} |
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#endif |
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|
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{ |
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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 (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 (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 (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 (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
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} |
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|
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state = ST_SETUP; |
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mapmode = Map0Cmd; |
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darkness = 1; |
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mapx = 11; |
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mapy = 11; |
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itemcmd = 1; /* Default is version item1 command */ |
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|
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faces_sent = salloc0<uint8> (nrofpixmaps); |
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|
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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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faces_sent[0] = NS_FACESENT_FACE; |
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|
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// socket I/O is low priority |
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// we prefer to have the server run instead of handling client requests |
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socket_ev.prio (PE_PRIO_NORMAL + 1); |
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socket_ev.fd (fd); |
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socket_ev.poll (PE_R); |
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|
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// command handling is even lower priority |
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// that way no client can monopolise the server |
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cmd_ev.prio (PE_PRIO_NORMAL + 2); |
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|
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// initialisation done, kick it! |
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send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
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flush (); |
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|
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// clients are externally referenced by the socket |
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refcnt_inc (); |
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clients.push_back (this); |
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|
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#if 0//TODO |
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socket_info.nconns++; |
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if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
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if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
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#endif |
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} |
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|
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client::~client () |
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{ |
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sfree<uint8> (faces_sent, nrofpixmaps); |
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free (stats.range); |
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free (stats.title); |
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free (host); |
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} |
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|
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void |
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client::do_destroy () |
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{ |
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attachable::do_destroy (); |
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|
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sockvec::iterator i = find (clients.begin (), clients.end (), this); |
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if (i != clients.end ()) |
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clients.erase (i); |
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|
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if (pl) |
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pl->disconnect (); |
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|
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if (fd >= 0) |
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close (fd); |
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|
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state = ST_DEAD; |
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|
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socket_ev.suspend (); |
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cmd_ev.suspend (); |
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|
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// socket now longer references us |
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refcnt_dec (); |
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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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cst_tot.time_start = time (NULL); |
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cst_lst.time_start = time (NULL); |
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|
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LOG (llevDebug, "Initialize new client/server data\n"); |
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|
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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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} |
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|
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client * |
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client::create (int fd, const char *peername) |
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{ |
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if (checkbanned (NULL, peername)) |
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{ |
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LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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return 0; |
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} |
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else |
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{ |
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client *ns = new client (dup (fd), peername); |
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|
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ns->instantiate (); // effectively a nop right now |
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|
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INVOKE_CLIENT (CONNECT, ns); |
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|
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return ns; |
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} |
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} |
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|
