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 (17 years, 6 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
#	Content
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	The author can be reached via e-mail to <crossfire@schmorp.de>
22	*/
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	#include <sproto.h>
38	#include <sys/types.h>
39	#include <sys/time.h>
40	#include <sys/socket.h>
41	#include <netinet/in.h>
42	#include <netdb.h>
43
44	#include <unistd.h>
45	#include <arpa/inet.h>
46
47	sockvec clients;
48
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	client::client (int fd, const char *peername)
55	: fd (fd), host (strdup (peername)),
56	socket_ev (this, &client::socket_cb),
57	cmd_ev (this, &client::cmd_cb)
58	{
59	{
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
88	mapmode = Map0Cmd;
89	darkness = 1;
90	status = Ns_Add;
91	mapx = 11;
92	mapy = 11;
93	itemcmd = 1; /* Default is version item1 command */
94
95	faces_sent_len = nrofpixmaps;
96	faces_sent = (uint8 )calloc (nrofpixmaps, sizeof (faces_sent));
97	if (!faces_sent)
98	fatal (OUT_OF_MEMORY);
99
100	/* 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	faces_sent[0] = NS_FACESENT_FACE;
105
106	// 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	socket_ev.fd (fd);
110	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
116	// initialisation done, kick it!
117
118	send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
119	flush ();
120
121	#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	}
127
128	client::~client ()
129	{
130	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	status = Ns_Dead;
145	socket_ev.suspend ();
146	cmd_ev.suspend ();
147	}
148
149	/** This sets up the socket and reads all the image information into memory. */
150	void
151	init_ericserver (void)
152	{
153	cst_tot.time_start = time (NULL);
154	cst_lst.time_start = time (NULL);
155
156	LOG (llevDebug, "Initialize new client/server data\n");
157
158	read_client_images ();
159	}
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	void
170	free_all_newserver (void)
171	{
172	LOG (llevDebug, "Freeing all new client/server information.\n");
173	free_socket_images ();
174	}
175
176	/** Sends the 'goodbye' command to the player, and closes connection. */
177	void
178	final_free_player (player *pl)
179	{
180	free_player (pl);
181	}
182
183	bool
184	add_client (int fd, const char *peername)
185	{
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	client *ns = new client (dup (fd), peername);
194	clients.push_back (ns);
195	return true;
196	}
197	}
198