server/socket/init.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008,2009,2010 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;
  mapmode = Map1aCmd;
  mapx = 11;
  mapy = 11;
  itemcmd = 1;              /* Default is version item1 command */
  max_rate = 200000 / (1000000 / MAX_TIME); // ~2mbit 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!
  INVOKE_CLIENT (CONNECT, this);

  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 ()
{
  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 < 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

  return ns;
}

Revision:	1.66
Committed:	Thu Apr 8 19:31:22 2010 UTC (14 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.65:	+5 -3 lines
Log Message:	new server protocol
#	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	1.64	* Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	pippijn	1.36	*
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	pippijn	1.36	*
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	pippijn	1.36	*
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	1.46	*
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	1.60	mapmode = Map1aCmd;
134	root	1.15	mapx = 11;
135			mapy = 11;
136			itemcmd = 1; /* Default is version item1 command */
137	root	1.66	max_rate = 200000 / (1000000 / MAX_TIME); // ~2mbit is assumed per default
138	root	1.12
139	root	1.7	/* Do this so we don't send a face command for the client for
140			* this face. Face 0 is sent to the client to say clear
141			* face information.
142			*/
143	root	1.40	faces_sent[0] = true;
144	root	1.50	fx_want [FT_FACE] = true; // all clients must support image faces
145	root	1.7
146	root	1.54	socket_ev.set (fd, EV_READ);
147	root	1.56	socket_ev.prio (2); // one higher than the ticker priority
148	root	1.54	socket_ev.start ();
149	root	1.21
150	root	1.16	// initialisation done, kick it!
151	root	1.66	INVOKE_CLIENT (CONNECT, this);
152
153	root	1.21	flush ();
154	root	1.13
155	root	1.35	reset_stats ();
156
157	root	1.34	clients.insert (this);
158	elmex	1.1	}
159
160	root	1.20	client::~client ()
161	root	1.16	{
162	root	1.34	clients.erase (this);
163	root	1.32
164	root	1.51	mapinfo_queue_clear ();
165	root	1.22	free (stats.range);
166			free (stats.title);
167			free (host);
168	root	1.21	}
169
170			void
171	root	1.31	client::do_destroy ()
172	root	1.21	{
173	root	1.65	INVOKE_CLIENT (CLIENT_DESTROY, this);
174	root	1.31	attachable::do_destroy ();
175
176			if (pl)
177			pl->disconnect ();
178
179			if (fd >= 0)
180	root	1.34	{
181			send_packet ("goodbye");
182			flush ();
183
184			close (fd);
185			}
186	root	1.29
187	root	1.28	state = ST_DEAD;
188	root	1.27
189	root	1.54	socket_ev.stop ();
190	root	1.31
191	root	1.34	refcnt_dec (); // socket no longer open
192	root	1.16	}
193	elmex	1.1
194	root	1.35	void
195			client::reset_stats ()
196			{
197			/* we need to clear these to -1 and not zero - otherwise,
198			* if a player quits and starts a new character, we wont
199			* send new values to the client, as things like exp start
200			* at zero.
201			*/
202			for (int i = 0; i < NUM_SKILLS; i++)
203			last_skill_exp[i] = -1;
204
205			for (int i = 0; i < NROFATTACKS; i++)
206			last_resist[i] = -1;
207
208			last_weapon_sp = -1;
209			last_level = -1;
210			last_stats.exp = -1;
211			last_flags = 0;
212	root	1.58	last_weight = -1;
213	root	1.35	last_weight_limit = 0;
214			last_path_attuned = 0;
215			last_path_repelled = 0;
216			last_path_denied = 0;
217			last_speed = 0;
218	root	1.45	last_flags = 0;
219	root	1.35
220			static living zero_living;
221			last_stats = zero_living;
222			}
223
224	root	1.27	client *
225			client::create (int fd, const char *peername)
226	root	1.16	{
227	root	1.38	client *ns = new client (dup (fd), peername);
228	root	1.66
229	root	1.38	ns->instantiate (); // effectively a nop right now
230	root	1.66
231	root	1.38	return ns;
232	root	1.16	}
233