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
#	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			#ifdef HAVE_UNISTD_H
45	root	1.7	# include <unistd.h>
46	elmex	1.1	#endif
47
48			#ifdef HAVE_ARPA_INET_H
49	root	1.7	# include <arpa/inet.h>
50	elmex	1.1	#endif
51			#include <newserver.h>
52
53	root	1.16	sockvec client_sockets;
54	elmex	1.1
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	root	1.16	client_socket::client_socket (int fd, const char *peername)
61			: fd (fd), host (strdup (peername))
62	elmex	1.1	{
63	root	1.16	{
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	elmex	1.1
92	root	1.15	mapmode = Map0Cmd;
93			darkness = 1;
94			status = Ns_Add;
95			mapx = 11;
96			mapy = 11;
97			itemcmd = 1; /* Default is version item1 command */
98	root	1.12
99	root	1.16	faces_sent_len = nrofpixmaps;
100			faces_sent = (uint8 )calloc (nrofpixmaps, sizeof (faces_sent));
101			if (!faces_sent)
102			fatal (OUT_OF_MEMORY);
103
104	root	1.7	/* 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	root	1.15	faces_sent[0] = NS_FACESENT_FACE;
109	root	1.7
110	root	1.15	can_write = 1;
111
112	root	1.16	// initialisation done, kick it!
113	root	1.13
114			{
115	root	1.14	packet sl;
116	root	1.13	sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
117	root	1.15	send_packet (sl);
118	root	1.13	}
119
120	root	1.16	#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	elmex	1.1	}
126
127	root	1.16	client_socket::~client_socket ()
128			{
129			status = Ns_Dead;
130			}
131	elmex	1.1
132			/** This sets up the socket and reads all the image information into memory. */
133	root	1.7	void
134			init_ericserver (void)
135	elmex	1.1	{
136	root	1.7	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	elmex	1.1
144	root	1.7	LOG (llevDebug, "Initialize new client/server data\n");
145	root	1.11
146	root	1.7	read_client_images ();
147	elmex	1.1	}
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	root	1.7	void
158			free_all_newserver (void)
159			{
160			LOG (llevDebug, "Freeing all new client/server information.\n");
161			free_socket_images ();
162	elmex	1.1	}
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	root	1.7	void
172	root	1.15	free_newsocket (client_socket *ns)
173	elmex	1.1	{
174	root	1.16	if (ns->fd >= 0)
175			close (ns->fd);
176	root	1.9
177	root	1.7	if (ns->stats.range)
178			free (ns->stats.range);
179	root	1.9
180	root	1.7	if (ns->stats.title)
181			free (ns->stats.title);
182	root	1.9
183	root	1.7	free (ns->host);
184	root	1.16
185			ns->fd = -1;
186			ns->stats.range = 0;
187			ns->stats.title = 0;
188			ns->host = 0;
189	elmex	1.1	}
190
191			/** Sends the 'goodbye' command to the player, and closes connection. */
192	root	1.7	void
193			final_free_player (player *pl)
194	elmex	1.1	{
195	root	1.16	pl->socket->send_packet ("goodbye");
196			free_newsocket (pl->socket);
197	root	1.7	free_player (pl);
198	elmex	1.1	}
199	root	1.13
200	root	1.16	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