server/socket/init.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2001 Mark Wedel
    Copyright (C) 1992 Frank Tore Johansen

    This program 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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The author can be reached via e-mail to <crossfire@schmorp.de>
*/

/**
 * \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 <netdb.h>

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

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),
  cmd_ev    (this, &client::cmd_cb)
{
  {
    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, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
  }

  {
    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);
  }

  mapmode = Map0Cmd;
  darkness = 1;
  status = Ns_Add;
  mapx = 11;
  mapy = 11;
  itemcmd = 1;              /* Default is version item1 command */

  faces_sent_len = nrofpixmaps;
  faces_sent = (uint8 *)calloc (nrofpixmaps, sizeof (*faces_sent));
  if (!faces_sent)
    fatal (OUT_OF_MEMORY);

  /* 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] = NS_FACESENT_FACE;

  // socket I/O is low priority
  // we prefer to have the server run instead of handling client requests
  socket_ev.prio (PE_PRIO_NORMAL + 1);
  socket_ev.fd (fd);
  socket_ev.poll (PE_R);

  // command handling is even lower priority
  // that way no client can monopolise the server
  cmd_ev.prio (PE_PRIO_NORMAL + 2);

  // initialisation done, kick it!

  send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
  flush ();

#if 0//TODO
  socket_info.nconns++;
  if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
  if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
#endif
}

client::~client ()
{
  if (pl)
    pl->socket = 0;

  if (fd >= 0)
    close (fd), fd = -1;

  free (stats.range), stats.range = 0;
  free (stats.title), stats.title = 0;
  free (host), host = 0;
}

void
client::destroy ()
{
  status = Ns_Dead;
  socket_ev.suspend ();
  cmd_ev.suspend ();
}

/** This sets up the socket and reads all the image information into memory. */
void
init_ericserver (void)
{
  cst_tot.time_start = time (NULL);
  cst_lst.time_start = time (NULL);

  LOG (llevDebug, "Initialize new client/server data\n");

  read_client_images ();
}


/*******************************************************************************
 *
 * Start of functions dealing with freeing of the data.
 *
 ******************************************************************************/

/** Free's all the memory that ericserver allocates. */
void
free_all_newserver (void)
{
  LOG (llevDebug, "Freeing all new client/server information.\n");
  free_socket_images ();
}

/** Sends the 'goodbye' command to the player, and closes connection. */
void
final_free_player (player *pl)
{
  free_player (pl);
}

bool
add_client (int fd, const char *peername)
{
  if (checkbanned (NULL, peername))
    {
      LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
      return false;
    }
  else
    {
      client *ns = new client (dup (fd), peername);
      clients.push_back (ns);
      return true;
    }
}

Revision:	1.21
Committed:	Sat Dec 16 03:08:26 2006 UTC (19 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.20:	+28 -41 lines
Log Message:	- socket i/o is completely asynchronous now - some command sare handled immediately - others (most palying related commands) are queued for later (as of now synchronous) processing - specifying a max queue length (in seconds) is possible, but disabled - also add some syntax sugar for network code
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2001 Mark Wedel
5			Copyright (C) 1992 Frank Tore Johansen
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	root	1.8	The author can be reached via e-mail to <crossfire@schmorp.de>
22	elmex	1.1	*/
23
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
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			#include <netdb.h>
43	elmex	1.1
44	root	1.19	#include <unistd.h>
45			#include <arpa/inet.h>
46	elmex	1.1
47	root	1.20	sockvec clients;
48	elmex	1.1
49			/**
50			* Initializes a connection. Really, it just sets up the data structure,
51			* socket setup is handled elsewhere. We do send a version to the
52			* client.
53			*/
54	root	1.20	client::client (int fd, const char *peername)
55	root	1.17	: fd (fd), host (strdup (peername)),
56	root	1.21	socket_ev (this, &client::socket_cb),
57			cmd_ev (this, &client::cmd_cb)
58	elmex	1.1	{
59	root	1.16	{
60			struct linger linger_opt;
61
62			linger_opt.l_onoff = 0;
63			linger_opt.l_linger = 0;
64
65			if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
66			LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
67			}
68
69			{
70			int bufsize = 65535; /Supposed absolute upper limit /
71			int oldbufsize;
72			int buflen = sizeof (int);
73
74			if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
75			LOG (llevError, "InitConnection: Error on fcntl.\n");
76
77			if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen) == -1)
78			oldbufsize = 0;
79
80			if (oldbufsize < bufsize)
81			if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
82			LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
83
84			buflen = sizeof (oldbufsize);
85			getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen);
86			}
87	elmex	1.1
88	root	1.15	mapmode = Map0Cmd;
89			darkness = 1;
90			status = Ns_Add;
91			mapx = 11;
92			mapy = 11;
93			itemcmd = 1; /* Default is version item1 command */
94	root	1.12
95	root	1.16	faces_sent_len = nrofpixmaps;
96			faces_sent = (uint8 )calloc (nrofpixmaps, sizeof (faces_sent));
97			if (!faces_sent)
98			fatal (OUT_OF_MEMORY);
99
100	root	1.7	/* Do this so we don't send a face command for the client for
101			* this face. Face 0 is sent to the client to say clear
102			* face information.
103			*/
104	root	1.15	faces_sent[0] = NS_FACESENT_FACE;
105	root	1.7
106	root	1.21	// socket I/O is low priority
107			// we prefer to have the server run instead of handling client requests
108			socket_ev.prio (PE_PRIO_NORMAL + 1);
109	root	1.18	socket_ev.fd (fd);
110	root	1.21	socket_ev.poll (PE_R);
111
112			// command handling is even lower priority
113			// that way no client can monopolise the server
114			cmd_ev.prio (PE_PRIO_NORMAL + 2);
115	root	1.15
116	root	1.16	// initialisation done, kick it!
117	root	1.13
118	root	1.21	send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
119			flush ();
120	root	1.13
121	root	1.16	#if 0//TODO
122			socket_info.nconns++;
123			if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
124			if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
125			#endif
126	elmex	1.1	}
127
128	root	1.20	client::~client ()
129	root	1.16	{
130	root	1.21	if (pl)
131			pl->socket = 0;
132
133			if (fd >= 0)
134			close (fd), fd = -1;
135
136			free (stats.range), stats.range = 0;
137			free (stats.title), stats.title = 0;
138			free (host), host = 0;
139			}
140
141			void
142			client::destroy ()
143			{
144	root	1.16	status = Ns_Dead;
145	root	1.21	socket_ev.suspend ();
146			cmd_ev.suspend ();
147	root	1.16	}
148	elmex	1.1
149			/** This sets up the socket and reads all the image information into memory. */
150	root	1.7	void
151			init_ericserver (void)
152	elmex	1.1	{
153	root	1.7	cst_tot.time_start = time (NULL);
154			cst_lst.time_start = time (NULL);
155	elmex	1.1
156	root	1.7	LOG (llevDebug, "Initialize new client/server data\n");
157	root	1.11
158	root	1.7	read_client_images ();
159	elmex	1.1	}
160
161
162			/*******************************************************************************
163			*
164			* Start of functions dealing with freeing of the data.
165			*
166			******************************************************************************/
167
168			/** Free's all the memory that ericserver allocates. */
169	root	1.7	void
170			free_all_newserver (void)
171			{
172			LOG (llevDebug, "Freeing all new client/server information.\n");
173			free_socket_images ();
174	elmex	1.1	}
175
176			/** Sends the 'goodbye' command to the player, and closes connection. */
177	root	1.7	void
178			final_free_player (player *pl)
179	elmex	1.1	{
180	root	1.7	free_player (pl);
181	elmex	1.1	}
182	root	1.13
183	root	1.16	bool
184	root	1.20	add_client (int fd, const char *peername)
185	root	1.16	{
186			if (checkbanned (NULL, peername))
187			{
188			LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
189			return false;
190			}
191			else
192			{
193	root	1.20	client *ns = new client (dup (fd), peername);
194			clients.push_back (ns);
195	root	1.16	return true;
196			}
197			}
198