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/* |
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* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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* |
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* Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team |
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* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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* |
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* Deliantra is free software: you can redistribute it and/or modify it under |
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* the terms of the Affero GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or (at your |
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* 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 Affero GNU General Public License |
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* and the GNU General Public License along with this program. If not, see |
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* <http://www.gnu.org/licenses/>. |
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* |
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* The authors can be reached via e-mail to <support@deliantra.net> |
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*/ |
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|
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/* |
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* Socket general functions |
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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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{ |
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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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socket_timeout = 16.; |
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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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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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state = ST_SETUP; |
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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 set meta data |
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* for following faces in fx. |
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*/ |
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faces_sent[0] = true; |
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fx_want [FT_IMAGE] = true; // all clients must support image faces |
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|
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socket_ev.set (fd, EV_READ); |
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socket_ev.prio (2); // one higher than the ticker priority |
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socket_ev.start (); |
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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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while (!ixface.empty ()) |
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ix_pop (); |
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|
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mapinfo_queue_clear (); |
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free (stats.range); |
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free (stats.title); |
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free (host); |
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free (ws_inbuf); |
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} |
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|
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void |
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client::run () |
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{ |
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// initialisation done, kick it! |
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INVOKE_CLIENT (CONNECT, this); |
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|
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flush (); |
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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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INVOKE_CLIENT (CLIENT_DESTROY, this); |
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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.stop (); |
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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 < ecb_array_length (last_skill_exp); i++) |
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last_skill_exp[i] = -1; |
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|
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for (int i = 0; i < ecb_array_length (last_resist); 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_flags = 0; |
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last_weight = -1; |
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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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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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|
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ns->instantiate (); // effectively a nop right now |
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|
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return ns; |
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} |
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|
