server/socket/init.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007 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 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 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

  {
    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
  }

  {
    int bufsize = 65535;          /*Supposed absolute upper limit */
    int oldbufsize;
    int buflen = sizeof (int);

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

    if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
      oldbufsize = 0;

    if (oldbufsize < bufsize)
      if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
        LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);

    buflen = sizeof (oldbufsize);
    getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
  }

  state = ST_SETUP;
  mapmode = Map0Cmd;
  darkness = 1;
  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.prio (PE_PRIO_HIGH);
  socket_ev.fd (fd);
  socket_ev.poll (PE_R);

  // 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.suspend ();

  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_weight = (uint32) - 1;
  last_flags = 0;
  last_weight = 0;
  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:	1.53
Committed:	Thu Nov 8 19:43:29 2007 UTC (16 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.52:	+4 -4 lines
Log Message:	update copyrights and other minor stuff to deliantra
#	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	1.53	* Copyright (©) 2005,2006,2007 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	1.53	* Deliantra is free software: you can redistribute it and/or modify
9	root	1.49	* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation, either version 3 of the License, or
11			* (at your 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	1.49	* You should have received a copy of the GNU General Public License
19			* along with this program. If not, see <http://www.gnu.org/licenses/>.
20	root	1.46	*
21	root	1.53	* The authors can be reached via e-mail to <support@deliantra.net>
22	pippijn	1.36	*/
23	elmex	1.1
24			/**
25			* \file
26			* Socket general functions
27			*
28			* \date 2003-12-02
29			*
30			* Mainly deals with initialization and higher level socket
31			* maintenance (checking for lost connections and if data has arrived.)
32			* The reading of data is handled in ericserver.c
33			*/
34
35			#include <global.h>
36	root	1.11	#include <sproto.h>
37	pippijn	1.10	#include <sys/types.h>
38			#include <sys/time.h>
39			#include <sys/socket.h>
40			#include <netinet/in.h>
41	root	1.23	#include <netinet/tcp.h>
42			#include <netinet/ip.h>
43	pippijn	1.10	#include <netdb.h>
44	elmex	1.1
45	root	1.19	#include <unistd.h>
46			#include <arpa/inet.h>
47	elmex	1.1
48	root	1.31	#include <algorithm>
49
50	root	1.48	// use relatively small values, as we do not expect to receive much,
51			// and we do userspace write buffering
52			// 8kb limits throughput to roughly 66kb/s
53			#define SOCKET_RCVBUF 8192
54			#define SOCKET_SNDBUF 16384
55
56	root	1.20	sockvec clients;
57	elmex	1.1
58			/**
59			* Initializes a connection. Really, it just sets up the data structure,
60			* socket setup is handled elsewhere. We do send a version to the
61			* client.
62			*/
63	root	1.20	client::client (int fd, const char *peername)
64	root	1.17	: fd (fd), host (strdup (peername)),
65	root	1.52	socket_ev (this, &client::socket_cb)
66	elmex	1.1	{
67	root	1.34	refcnt_inc (); // the socket is an external reference
68
69	root	1.43	mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead
70	root	1.42
71	root	1.16	{
72			struct linger linger_opt;
73
74	root	1.44	linger_opt.l_onoff = 0;
75	root	1.16	linger_opt.l_linger = 0;
76
77			if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
78	root	1.23	LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
79	root	1.16	}
80
81			{
82	root	1.42	int val;
83	root	1.23
84	root	1.48	#ifdef SO_RCVBUF
85			val = SOCKET_RCVBUF;
86			if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val)))
87			LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno));
88			#endif
89
90			#ifdef SO_SNDBUF
91			val = SOCKET_SNDBUF;
92			if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val)))
93			LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno));
94			#endif
95
96	root	1.42	#ifdef IP_TOS
97			val = IPTOS_LOWDELAY;
98	root	1.23	if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
99			LOG (llevError, "IP_TOS: %s\n", strerror (errno));
100	root	1.42	#endif
101	root	1.23
102	root	1.42	#ifdef TCP_NODELAY
103			val = 1;
104	root	1.23	if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
105			LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
106	root	1.42	#endif
107
108			// set some very aggressive keepalive parameters
109			#ifdef TCP_KEEPIDLE
110	root	1.44	val = 1;
111	root	1.42	if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
112			LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
113			#endif
114
115			#ifdef TCP_KEEPCNT
116	root	1.44	val = 3;
117	root	1.42	if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
118			LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
119			#endif
120	root	1.23
121	root	1.42	#ifdef TCP_KEEPINTVL
122			val = 1;
123			if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
124			LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
125			#endif
126	root	1.23
127	root	1.42	// try to find the mss value in use
128			#ifdef TCP_MAXSEG
129			socklen_t sl = sizeof (val);
130			if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val))
131			mss = val;
132			#endif
133	root	1.23	}
134
135			{
136	root	1.16	int bufsize = 65535; /Supposed absolute upper limit /
137			int oldbufsize;
138			int buflen = sizeof (int);
139
140			if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
141			LOG (llevError, "InitConnection: Error on fcntl.\n");
142
143			if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen) == -1)
144			oldbufsize = 0;
145
146			if (oldbufsize < bufsize)
147			if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
148			LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
149
150			buflen = sizeof (oldbufsize);
151			getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen);
152			}
153	elmex	1.1
154	root	1.28	state = ST_SETUP;
155	root	1.15	mapmode = Map0Cmd;
156			darkness = 1;
157			mapx = 11;
158			mapy = 11;
159			itemcmd = 1; /* Default is version item1 command */
160	root	1.41	max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default
161	root	1.12
162	root	1.7	/* Do this so we don't send a face command for the client for
163			* this face. Face 0 is sent to the client to say clear
164			* face information.
165			*/
166	root	1.40	faces_sent[0] = true;
167	root	1.50	fx_want [FT_FACE] = true; // all clients must support image faces
168	root	1.7
169	root	1.52	socket_ev.prio (PE_PRIO_HIGH);
170	root	1.18	socket_ev.fd (fd);
171	root	1.21	socket_ev.poll (PE_R);
172
173	root	1.16	// initialisation done, kick it!
174	root	1.21	send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
175			flush ();
176	root	1.13
177	root	1.35	reset_stats ();
178
179	root	1.34	clients.insert (this);
180	elmex	1.1	}
181
182	root	1.20	client::~client ()
183	root	1.16	{
184	root	1.34	clients.erase (this);
185	root	1.32
186	root	1.51	mapinfo_queue_clear ();
187	root	1.22	free (stats.range);
188			free (stats.title);
189			free (host);
190	root	1.21	}
191
192			void
193	root	1.31	client::do_destroy ()
194	root	1.21	{
195	root	1.31	attachable::do_destroy ();
196
197			if (pl)
198			pl->disconnect ();
199
200			if (fd >= 0)
201	root	1.34	{
202			send_packet ("goodbye");
203			flush ();
204
205			close (fd);
206			}
207	root	1.29
208	root	1.28	state = ST_DEAD;
209	root	1.27
210	root	1.21	socket_ev.suspend ();
211	root	1.31
212	root	1.34	refcnt_dec (); // socket no longer open
213	root	1.16	}
214	elmex	1.1
215	root	1.35	void
216			client::reset_stats ()
217			{
218			/* we need to clear these to -1 and not zero - otherwise,
219			* if a player quits and starts a new character, we wont
220			* send new values to the client, as things like exp start
221			* at zero.
222			*/
223			for (int i = 0; i < NUM_SKILLS; i++)
224			last_skill_exp[i] = -1;
225
226			for (int i = 0; i < NROFATTACKS; i++)
227			last_resist[i] = -1;
228
229			last_weapon_sp = -1;
230			last_level = -1;
231			last_stats.exp = -1;
232			last_weight = (uint32) - 1;
233			last_flags = 0;
234			last_weight = 0;
235			last_weight_limit = 0;
236			last_path_attuned = 0;
237			last_path_repelled = 0;
238			last_path_denied = 0;
239			last_speed = 0;
240	root	1.45	last_flags = 0;
241	root	1.35
242			static living zero_living;
243			last_stats = zero_living;
244			}
245
246	root	1.27	client *
247			client::create (int fd, const char *peername)
248	root	1.16	{
249	root	1.38	client *ns = new client (dup (fd), peername);
250			ns->instantiate (); // effectively a nop right now
251			INVOKE_CLIENT (CONNECT, ns);
252			return ns;
253	root	1.16	}
254