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>

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include <newserver.h>

sockvec client_sockets;

/**
 * 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_socket::client_socket (int fd, const char *peername)
: fd (fd), host (strdup (peername))
{
  {
    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;

  can_write = 1;

  // initialisation done, kick it!

  {
    packet sl;
    sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
    send_packet (sl);
  }

#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_socket::~client_socket ()
{
  status = Ns_Dead;
}

/** This sets up the socket and reads all the image information into memory. */
void
init_ericserver (void)
{
  struct sockaddr_in insock;
  struct linger linger_opt;

  memset (&cst_tot, 0, sizeof (CS_Stats));
  memset (&cst_lst, 0, sizeof (CS_Stats));
  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 ();
}

/**
 * Frees a socket.
 * Basically, all we need to do here is free all data structures that
 * might be associated with the socket.  It is up to the caller to
 * update the list
 */

void
free_newsocket (client_socket *ns)
{
  if (ns->fd >= 0)
    close (ns->fd);

  if (ns->stats.range)
    free (ns->stats.range);

  if (ns->stats.title)
    free (ns->stats.title);

  free (ns->host);

  ns->fd = -1;
  ns->stats.range = 0;
  ns->stats.title = 0;
  ns->host = 0;
}

/** Sends the 'goodbye' command to the player, and closes connection. */
void
final_free_player (player *pl)
{
  pl->socket->send_packet ("goodbye");
  free_newsocket (pl->socket);
  free_player (pl);
}

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

Revision:	1.16
Committed:	Thu Dec 14 04:30:33 2006 UTC (17 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+71 -138 lines
Log Message:	- rewrote most of the socket loop code - moved connection accept into tcp.ext - no evil socket copying anymore, needs more cleanups
#	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	#ifdef HAVE_UNISTD_H
45	# include <unistd.h>
46	#endif
47
48	#ifdef HAVE_ARPA_INET_H
49	# include <arpa/inet.h>
50	#endif
51	#include <newserver.h>
52
53	sockvec client_sockets;
54
55	/**
56	* Initializes a connection. Really, it just sets up the data structure,
57	* socket setup is handled elsewhere. We do send a version to the
58	* client.
59	*/
60	client_socket::client_socket (int fd, const char *peername)
61	: fd (fd), host (strdup (peername))
62	{
63	{
64	struct linger linger_opt;
65
66	linger_opt.l_onoff = 0;
67	linger_opt.l_linger = 0;
68
69	if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
70	LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
71	}
72
73	{
74	int bufsize = 65535; /Supposed absolute upper limit /
75	int oldbufsize;
76	int buflen = sizeof (int);
77
78	if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
79	LOG (llevError, "InitConnection: Error on fcntl.\n");
80
81	if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen) == -1)
82	oldbufsize = 0;
83
84	if (oldbufsize < bufsize)
85	if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
86	LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
87
88	buflen = sizeof (oldbufsize);
89	getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen);
90	}
91
92	mapmode = Map0Cmd;
93	darkness = 1;
94	status = Ns_Add;
95	mapx = 11;
96	mapy = 11;
97	itemcmd = 1; /* Default is version item1 command */
98
99	faces_sent_len = nrofpixmaps;
100	faces_sent = (uint8 )calloc (nrofpixmaps, sizeof (faces_sent));
101	if (!faces_sent)
102	fatal (OUT_OF_MEMORY);
103
104	/* Do this so we don't send a face command for the client for
105	* this face. Face 0 is sent to the client to say clear
106	* face information.
107	*/
108	faces_sent[0] = NS_FACESENT_FACE;
109
110	can_write = 1;
111
112	// initialisation done, kick it!
113
114	{
115	packet sl;
116	sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
117	send_packet (sl);
118	}
119
120	#if 0//TODO
121	socket_info.nconns++;
122	if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
123	if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
124	#endif
125	}
126
127	client_socket::~client_socket ()
128	{
129	status = Ns_Dead;
130	}
131
132	/** This sets up the socket and reads all the image information into memory. */
133	void
134	init_ericserver (void)
135	{
136	struct sockaddr_in insock;
137	struct linger linger_opt;
138
139	memset (&cst_tot, 0, sizeof (CS_Stats));
140	memset (&cst_lst, 0, sizeof (CS_Stats));
141	cst_tot.time_start = time (NULL);
142	cst_lst.time_start = time (NULL);
143
144	LOG (llevDebug, "Initialize new client/server data\n");
145
146	read_client_images ();
147	}
148
149
150	/*******************************************************************************
151	*
152	* Start of functions dealing with freeing of the data.
153	*
154	******************************************************************************/
155
156	/** Free's all the memory that ericserver allocates. */
157	void
158	free_all_newserver (void)
159	{
160	LOG (llevDebug, "Freeing all new client/server information.\n");
161	free_socket_images ();
162	}
163
164	/**
165	* Frees a socket.
166	* Basically, all we need to do here is free all data structures that
167	* might be associated with the socket. It is up to the caller to
168	* update the list
169	*/
170
171	void
172	free_newsocket (client_socket *ns)
173	{
174	if (ns->fd >= 0)
175	close (ns->fd);
176
177	if (ns->stats.range)
178	free (ns->stats.range);
179
180	if (ns->stats.title)
181	free (ns->stats.title);
182
183	free (ns->host);
184
185	ns->fd = -1;
186	ns->stats.range = 0;
187	ns->stats.title = 0;
188	ns->host = 0;
189	}
190
191	/** Sends the 'goodbye' command to the player, and closes connection. */
192	void
193	final_free_player (player *pl)
194	{
195	pl->socket->send_packet ("goodbye");
196	free_newsocket (pl->socket);
197	free_player (pl);
198	}
199
200	bool
201	add_client_socket (int fd, const char *peername)
202	{
203	if (checkbanned (NULL, peername))
204	{
205	LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
206	return false;
207	}
208	else
209	{
210	client_socket *ns = new client_socket (dup (fd), peername);
211	client_sockets.push_back (ns);
212	return true;
213	}
214	}
215