server/socket/init.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2001,2007 Mark Wedel
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

/**
 * \file
 * Socket general functions
 *
 * \date 2003-12-02
 *
 * Mainly deals with initialization and higher level socket
 * maintenance (checking for lost connections and if data has arrived.)
 * The reading of data is handled in ericserver.c
 */

#include <global.h>
#include <sproto.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netinet/ip.h>
#include <netdb.h>

#include <unistd.h>
#include <arpa/inet.h>

#include <algorithm>

// use relatively small values, as we do not expect to receive much,
// and we do userspace write buffering
// 8kb limits throughput to roughly 66kb/s
#define SOCKET_RCVBUF  8192
#define SOCKET_SNDBUF 16384

sockvec clients;

/**
 * Initializes a connection. Really, it just sets up the data structure,
 * socket setup is handled elsewhere.  We do send a version to the
 * client.
 */
client::client (int fd, const char *peername)
: fd (fd), host (strdup (peername)),
  socket_ev (this, &client::socket_cb)
{
  refcnt_inc (); // the socket is an external reference

  mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead

  socket_timeout = 16.;

  {
    struct linger linger_opt;

    linger_opt.l_onoff  = 0;
    linger_opt.l_linger = 0;

    if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
      LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
  }

  {
    int val;

#ifdef SO_RCVBUF
    val = SOCKET_RCVBUF;
    if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
      LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
#endif

#ifdef SO_SNDBUF
    val = SOCKET_SNDBUF;
    if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
      LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
#endif

#ifdef IP_TOS
    val = IPTOS_LOWDELAY;
    if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
      LOG (llevError, "IP_TOS: %s\n", strerror (errno));
#endif

#ifdef TCP_NODELAY
    val = 1;
    if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
      LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
#endif

    // set some very aggressive keepalive parameters
#ifdef TCP_KEEPIDLE
    val = 1;
    if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
      LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
#endif

#ifdef TCP_KEEPCNT
    val = 3;
    if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
      LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
#endif

#ifdef TCP_KEEPINTVL
    val = 1;
    if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
      LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
#endif

    // try to find the mss value in use
#ifdef TCP_MAXSEG
    socklen_t sl = sizeof (val);
    if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
      mss = val;
#endif
  }

  if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
    LOG (llevError, "InitConnection:  Error on fcntl.\n");

  state = ST_SETUP;
  mapmode = Map1aCmd;
  mapx = 11;
  mapy = 11;
  itemcmd = 1;              /* Default is version item1 command */
  max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default

  /* Do this so we don't send a face command for the client for
   * this face.  Face 0 is sent to the client to say clear
   * face information.
   */
  faces_sent[0] = true;
  fx_want [FT_FACE] = true; // all clients must support image faces

  socket_ev.set (fd, EV_READ);
  socket_ev.prio (2); // one higher than the ticker priority
  socket_ev.start ();

  // initialisation done, kick it!
  send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
  flush ();

  reset_stats ();

  clients.insert (this);
}

client::~client ()
{
  clients.erase (this);

  mapinfo_queue_clear ();
  free (stats.range);
  free (stats.title);
  free (host);
}

void
client::do_destroy ()
{
  attachable::do_destroy ();

  if (pl)
    pl->disconnect ();

  if (fd >= 0)
    {
      send_packet ("goodbye");
      flush ();

      close (fd);
    }

  state = ST_DEAD;

  socket_ev.stop ();

  refcnt_dec (); // socket no longer open
}

void
client::reset_stats ()
{
  /* we need to clear these to -1 and not zero - otherwise,
   * if a player quits and starts a new character, we wont
   * send new values to the client, as things like exp start
   * at zero.
   */
  for (int i = 0; i < NUM_SKILLS; i++)
    last_skill_exp[i] = -1;

  for (int i = 0; i < NROFATTACKS; i++)
    last_resist[i] = -1;

  last_weapon_sp = -1;
  last_level = -1;
  last_stats.exp = -1;
  last_flags = 0;
  last_weight = -1;
  last_weight_limit = 0;
  last_path_attuned = 0;
  last_path_repelled = 0;
  last_path_denied = 0;
  last_speed = 0;
  last_flags = 0;

  static living zero_living;
  last_stats = zero_living;
}

client *
client::create (int fd, const char *peername)
{
  client *ns = new client (dup (fd), peername);
  ns->instantiate (); // effectively a nop right now
  INVOKE_CLIENT (CONNECT, ns);
  return ns;
}

Revision:	1.62
Committed:	Mon Oct 12 14:00:59 2009 UTC (14 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_82, rel-2_81
Changes since 1.61:	+7 -6 lines
Log Message:	clarify license
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.53	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	pippijn	1.36	*
4	root	1.59	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.46	* Copyright (©) 2001,2007 Mark Wedel
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.36	*
8	root	1.62	* Deliantra is free software: you can redistribute it and/or modify it under
9			* the terms of the Affero GNU General Public License as published by the
10			* Free Software Foundation, either version 3 of the License, or (at your
11			* option) any later version.
12	pippijn	1.36	*
13	root	1.49	* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17	pippijn	1.36	*
18	root	1.62	* You should have received a copy of the Affero GNU General Public License
19			* and the GNU General Public License along with this program. If not, see
20			* <http://www.gnu.org/licenses/>.
21	root	1.46	*
22	root	1.53	* The authors can be reached via e-mail to <support@deliantra.net>
23	pippijn	1.36	*/
24	elmex	1.1
25			/**
26			* \file
27			* Socket general functions
28			*
29			* \date 2003-12-02
30			*
31			* Mainly deals with initialization and higher level socket
32			* maintenance (checking for lost connections and if data has arrived.)
33			* The reading of data is handled in ericserver.c
34			*/
35
36			#include <global.h>
37	root	1.11	#include <sproto.h>
38	pippijn	1.10	#include <sys/types.h>
39			#include <sys/time.h>
40			#include <sys/socket.h>
41			#include <netinet/in.h>
42	root	1.23	#include <netinet/tcp.h>
43			#include <netinet/ip.h>
44	pippijn	1.10	#include <netdb.h>
45	elmex	1.1
46	root	1.19	#include <unistd.h>
47			#include <arpa/inet.h>
48	elmex	1.1
49	root	1.31	#include <algorithm>
50
51	root	1.48	// use relatively small values, as we do not expect to receive much,
52			// and we do userspace write buffering
53			// 8kb limits throughput to roughly 66kb/s
54			#define SOCKET_RCVBUF 8192
55			#define SOCKET_SNDBUF 16384
56
57	root	1.20	sockvec clients;
58	elmex	1.1
59			/**
60			* Initializes a connection. Really, it just sets up the data structure,
61			* socket setup is handled elsewhere. We do send a version to the
62			* client.
63			*/
64	root	1.20	client::client (int fd, const char *peername)
65	root	1.17	: fd (fd), host (strdup (peername)),
66	root	1.52	socket_ev (this, &client::socket_cb)
67	elmex	1.1	{
68	root	1.34	refcnt_inc (); // the socket is an external reference
69
70	root	1.43	mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
71	root	1.42
72	root	1.61	socket_timeout = 16.;
73
74	root	1.16	{
75			struct linger linger_opt;
76
77	root	1.44	linger_opt.l_onoff = 0;
78	root	1.16	linger_opt.l_linger = 0;
79
80			if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
81	root	1.23	LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
82	root	1.16	}
83
84			{
85	root	1.42	int val;
86	root	1.23
87	root	1.48	#ifdef SO_RCVBUF
88			val = SOCKET_RCVBUF;
89			if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
90			LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
91			#endif
92
93			#ifdef SO_SNDBUF
94			val = SOCKET_SNDBUF;
95			if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
96			LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
97			#endif
98
99	root	1.42	#ifdef IP_TOS
100			val = IPTOS_LOWDELAY;
101	root	1.23	if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
102			LOG (llevError, "IP_TOS: %s\n", strerror (errno));
103	root	1.42	#endif
104	root	1.23
105	root	1.42	#ifdef TCP_NODELAY
106			val = 1;
107	root	1.23	if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
108			LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
109	root	1.42	#endif
110
111			// set some very aggressive keepalive parameters
112			#ifdef TCP_KEEPIDLE
113	root	1.44	val = 1;
114	root	1.42	if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
115			LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
116			#endif
117
118			#ifdef TCP_KEEPCNT
119	root	1.44	val = 3;
120	root	1.42	if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
121			LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
122			#endif
123	root	1.23
124	root	1.42	#ifdef TCP_KEEPINTVL
125			val = 1;
126			if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
127			LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
128			#endif
129	root	1.23
130	root	1.42	// try to find the mss value in use
131			#ifdef TCP_MAXSEG
132			socklen_t sl = sizeof (val);
133			if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
134			mss = val;
135			#endif
136	root	1.23	}
137
138	root	1.55	if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
139			LOG (llevError, "InitConnection: Error on fcntl.\n");
140	elmex	1.1
141	root	1.28	state = ST_SETUP;
142	root	1.60	mapmode = Map1aCmd;
143	root	1.15	mapx = 11;
144			mapy = 11;
145			itemcmd = 1; /* Default is version item1 command */
146	root	1.41	max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
147	root	1.12
148	root	1.7	/* Do this so we don't send a face command for the client for
149			* this face. Face 0 is sent to the client to say clear
150			* face information.
151			*/
152	root	1.40	faces_sent[0] = true;
153	root	1.50	fx_want [FT_FACE] = true; // all clients must support image faces
154	root	1.7
155	root	1.54	socket_ev.set (fd, EV_READ);
156	root	1.56	socket_ev.prio (2); // one higher than the ticker priority
157	root	1.54	socket_ev.start ();
158	root	1.21
159	root	1.16	// initialisation done, kick it!
160	root	1.21	send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
161			flush ();
162	root	1.13
163	root	1.35	reset_stats ();
164
165	root	1.34	clients.insert (this);
166	elmex	1.1	}
167
168	root	1.20	client::~client ()
169	root	1.16	{
170	root	1.34	clients.erase (this);
171	root	1.32
172	root	1.51	mapinfo_queue_clear ();
173	root	1.22	free (stats.range);
174			free (stats.title);
175			free (host);
176	root	1.21	}
177
178			void
179	root	1.31	client::do_destroy ()
180	root	1.21	{
181	root	1.31	attachable::do_destroy ();
182
183			if (pl)
184			pl->disconnect ();
185
186			if (fd >= 0)
187	root	1.34	{
188			send_packet ("goodbye");
189			flush ();
190
191			close (fd);
192			}
193	root	1.29
194	root	1.28	state = ST_DEAD;
195	root	1.27
196	root	1.54	socket_ev.stop ();
197	root	1.31
198	root	1.34	refcnt_dec (); // socket no longer open
199	root	1.16	}
200	elmex	1.1
201	root	1.35	void
202			client::reset_stats ()
203			{
204			/* we need to clear these to -1 and not zero - otherwise,
205			* if a player quits and starts a new character, we wont
206			* send new values to the client, as things like exp start
207			* at zero.
208			*/
209			for (int i = 0; i < NUM_SKILLS; i++)
210			last_skill_exp[i] = -1;
211
212			for (int i = 0; i < NROFATTACKS; i++)
213			last_resist[i] = -1;
214
215			last_weapon_sp = -1;
216			last_level = -1;
217			last_stats.exp = -1;
218			last_flags = 0;
219	root	1.58	last_weight = -1;
220	root	1.35	last_weight_limit = 0;
221			last_path_attuned = 0;
222			last_path_repelled = 0;
223			last_path_denied = 0;
224			last_speed = 0;
225	root	1.45	last_flags = 0;
226	root	1.35
227			static living zero_living;
228			last_stats = zero_living;
229			}
230
231	root	1.27	client *
232			client::create (int fd, const char *peername)
233	root	1.16	{
234	root	1.38	client *ns = new client (dup (fd), peername);
235			ns->instantiate (); // effectively a nop right now
236			INVOKE_CLIENT (CONNECT, ns);
237			return ns;
238	root	1.16	}
239