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/* |
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* This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
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* |
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* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
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* Copyright (©) 2001,2007 Mark Wedel |
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* Copyright (©) 1992,2007 Frank Tore Johansen |
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* |
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* Crossfire TRT is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the Free |
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* Software Foundation; either version 2 of the License, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* The authors 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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// use relatively small values, as we do not expect to receive much, |
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// and we do userspace write buffering |
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// 8kb limits throughput to roughly 66kb/s |
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#define SOCKET_RCVBUF 8192 |
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#define SOCKET_SNDBUF 16384 |
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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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{ |
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refcnt_inc (); // the socket is an external reference |
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|
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mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
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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; |
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|
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#ifdef SO_RCVBUF |
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val = SOCKET_RCVBUF; |
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if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val))) |
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LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno)); |
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#endif |
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|
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#ifdef SO_SNDBUF |
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val = SOCKET_SNDBUF; |
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if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val))) |
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LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno)); |
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#endif |
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|
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#ifdef IP_TOS |
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val = IPTOS_LOWDELAY; |
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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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#endif |
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|
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#ifdef TCP_NODELAY |
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val = 1; |
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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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#endif |
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|
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// set some very aggressive keepalive parameters |
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#ifdef TCP_KEEPIDLE |
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val = 1; |
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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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#endif |
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|
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#ifdef TCP_KEEPCNT |
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val = 3; |
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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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#endif |
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|
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#ifdef TCP_KEEPINTVL |
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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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#endif |
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|
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// try to find the mss value in use |
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#ifdef TCP_MAXSEG |
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socklen_t sl = sizeof (val); |
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if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
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mss = val; |
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#endif |
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} |
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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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max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
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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] = true; |
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|
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socket_ev.prio (PE_PRIO_NORMAL); |
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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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cmd_ev.prio (PE_PRIO_NORMAL); |
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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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reset_stats (); |
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|
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clients.insert (this); |
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} |
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|
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client::~client () |
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{ |
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clients.erase (this); |
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|
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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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if (pl) |
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pl->disconnect (); |
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|
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if (fd >= 0) |
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{ |
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send_packet ("goodbye"); |
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flush (); |
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|
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close (fd); |
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} |
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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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refcnt_dec (); // socket no longer open |
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} |
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|
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void |
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client::reset_stats () |
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{ |
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/* we need to clear these to -1 and not zero - otherwise, |
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* if a player quits and starts a new character, we wont |
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* send new values to the client, as things like exp start |
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* at zero. |
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*/ |
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for (int i = 0; i < NUM_SKILLS; i++) |
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last_skill_exp[i] = -1; |
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|
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for (int i = 0; i < NROFATTACKS; i++) |
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last_resist[i] = -1; |
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|
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last_weapon_sp = -1; |
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last_level = -1; |
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last_stats.exp = -1; |
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last_weight = (uint32) - 1; |
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last_flags = 0; |
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last_weight = 0; |
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last_weight_limit = 0; |
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last_path_attuned = 0; |
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last_path_repelled = 0; |
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last_path_denied = 0; |
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last_speed = 0; |
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last_flags = 0; |
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|
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static living zero_living; |
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last_stats = zero_living; |
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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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client *ns = new client (dup (fd), peername); |
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ns->instantiate (); // effectively a nop right now |
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INVOKE_CLIENT (CONNECT, ns); |
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return ns; |
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} |
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|
