server/socket/init.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 *
 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 *
 * 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>
 */

/*
 * Socket general functions
 */

#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;
  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 set meta data
   * for following faces in fx.
   */
  faces_sent[0] = true;
  fx_want [FT_IMAGE] = 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 ();

  reset_stats ();

  clients.insert (this);
}

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

  while (!ixface.empty ())
    ix_pop ();

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

void
client::run ()
{
  // initialisation done, kick it!
  INVOKE_CLIENT (CONNECT, this);

  flush ();
}

void
client::do_destroy ()
{
  INVOKE_CLIENT (CLIENT_DESTROY, this);
  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 < array_length (last_skill_exp); i++)
    last_skill_exp[i] = -1;

  for (int i = 0; i < array_length (last_resist); 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

  return ns;
}

Revision:	1.75
Committed:	Sun Nov 11 05:53:12 2012 UTC (11 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_1
Changes since 1.74:	+1 -1 lines
Log Message:	move face blob manegemnt fully to perl
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.53	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	root	1.72	*
4	root	1.71	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.72	*
6	root	1.62	* Deliantra is free software: you can redistribute it and/or modify it under
7			* the terms of the Affero GNU General Public License as published by the
8			* Free Software Foundation, either version 3 of the License, or (at your
9			* option) any later version.
10	root	1.72	*
11	root	1.49	* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15	root	1.72	*
16	root	1.62	* You should have received a copy of the Affero GNU General Public License
17			* and the GNU General Public License along with this program. If not, see
18			* <http://www.gnu.org/licenses/>.
19	root	1.72	*
20	root	1.53	* The authors can be reached via e-mail to <support@deliantra.net>
21	pippijn	1.36	*/
22	elmex	1.1
23	root	1.63	/*
24	elmex	1.1	* Socket general functions
25			*/
26
27			#include <global.h>
28	root	1.11	#include <sproto.h>
29	pippijn	1.10	#include <sys/types.h>
30			#include <sys/time.h>
31			#include <sys/socket.h>
32			#include <netinet/in.h>
33	root	1.23	#include <netinet/tcp.h>
34			#include <netinet/ip.h>
35	pippijn	1.10	#include <netdb.h>
36	elmex	1.1
37	root	1.19	#include <unistd.h>
38			#include <arpa/inet.h>
39	elmex	1.1
40	root	1.31	#include <algorithm>
41
42	root	1.48	// use relatively small values, as we do not expect to receive much,
43			// and we do userspace write buffering
44			// 8kb limits throughput to roughly 66kb/s
45			#define SOCKET_RCVBUF 8192
46			#define SOCKET_SNDBUF 16384
47
48	root	1.20	sockvec clients;
49	elmex	1.1
50			/**
51			* Initializes a connection. Really, it just sets up the data structure,
52			* socket setup is handled elsewhere. We do send a version to the
53			* client.
54			*/
55	root	1.20	client::client (int fd, const char *peername)
56	root	1.17	: fd (fd), host (strdup (peername)),
57	root	1.52	socket_ev (this, &client::socket_cb)
58	elmex	1.1	{
59	root	1.34	refcnt_inc (); // the socket is an external reference
60
61	root	1.43	mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
62	root	1.42
63	root	1.61	socket_timeout = 16.;
64
65	root	1.16	{
66			struct linger linger_opt;
67
68	root	1.44	linger_opt.l_onoff = 0;
69	root	1.16	linger_opt.l_linger = 0;
70
71			if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
72	root	1.23	LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
73	root	1.16	}
74
75			{
76	root	1.42	int val;
77	root	1.23
78	root	1.48	#ifdef SO_RCVBUF
79			val = SOCKET_RCVBUF;
80			if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
81			LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
82			#endif
83
84			#ifdef SO_SNDBUF
85			val = SOCKET_SNDBUF;
86			if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
87			LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
88			#endif
89
90	root	1.42	#ifdef IP_TOS
91			val = IPTOS_LOWDELAY;
92	root	1.23	if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
93			LOG (llevError, "IP_TOS: %s\n", strerror (errno));
94	root	1.42	#endif
95	root	1.23
96	root	1.42	#ifdef TCP_NODELAY
97			val = 1;
98	root	1.23	if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
99			LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
100	root	1.42	#endif
101
102			// set some very aggressive keepalive parameters
103			#ifdef TCP_KEEPIDLE
104	root	1.44	val = 1;
105	root	1.42	if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
106			LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
107			#endif
108
109			#ifdef TCP_KEEPCNT
110	root	1.44	val = 3;
111	root	1.42	if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
112			LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
113			#endif
114	root	1.23
115	root	1.42	#ifdef TCP_KEEPINTVL
116			val = 1;
117			if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
118			LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
119			#endif
120	root	1.23
121	root	1.42	// try to find the mss value in use
122			#ifdef TCP_MAXSEG
123			socklen_t sl = sizeof (val);
124			if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
125			mss = val;
126			#endif
127	root	1.23	}
128
129	root	1.55	if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
130			LOG (llevError, "InitConnection: Error on fcntl.\n");
131	elmex	1.1
132	root	1.28	state = ST_SETUP;
133	root	1.15	mapx = 11;
134			mapy = 11;
135			itemcmd = 1; /* Default is version item1 command */
136	root	1.67	max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
137	root	1.12
138	root	1.7	/* Do this so we don't send a face command for the client for
139	root	1.73	* this face. Face 0 is sent to the client to set meta data
140			* for following faces in fx.
141	root	1.7	*/
142	root	1.40	faces_sent[0] = true;
143	root	1.75	fx_want [FT_IMAGE] = true; // all clients must support image faces
144	root	1.7
145	root	1.54	socket_ev.set (fd, EV_READ);
146	root	1.56	socket_ev.prio (2); // one higher than the ticker priority
147	root	1.54	socket_ev.start ();
148	root	1.21
149	root	1.35	reset_stats ();
150
151	root	1.34	clients.insert (this);
152	elmex	1.1	}
153
154	root	1.20	client::~client ()
155	root	1.16	{
156	root	1.34	clients.erase (this);
157	root	1.32
158	root	1.74	while (!ixface.empty ())
159			ix_pop ();
160
161	root	1.51	mapinfo_queue_clear ();
162	root	1.22	free (stats.range);
163			free (stats.title);
164			free (host);
165	root	1.73	free (ws_inbuf);
166			}
167
168			void
169			client::run ()
170			{
171			// initialisation done, kick it!
172			INVOKE_CLIENT (CONNECT, this);
173
174			flush ();
175	root	1.21	}
176
177			void
178	root	1.31	client::do_destroy ()
179	root	1.21	{
180	root	1.65	INVOKE_CLIENT (CLIENT_DESTROY, this);
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	root	1.69	for (int i = 0; i < array_length (last_skill_exp); i++)
210	root	1.35	last_skill_exp[i] = -1;
211
212	root	1.69	for (int i = 0; i < array_length (last_resist); i++)
213	root	1.35	last_resist[i] = -1;
214
215	root	1.68	last_weapon_sp = -1;
216			last_level = -1;
217			last_stats.exp = -1;
218			last_flags = 0;
219			last_weight = -1;
220			last_weight_limit = 0;
221			last_path_attuned = 0;
222	root	1.35	last_path_repelled = 0;
223	root	1.68	last_path_denied = 0;
224			last_speed = 0;
225			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	root	1.66
236	root	1.38	ns->instantiate (); // effectively a nop right now
237	root	1.66
238	root	1.38	return ns;
239	root	1.16	}
240