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>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif
#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>

Socket_Info socket_info;
NewSocket *init_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.
 */
void
InitConnection (NewSocket * ns, const char *from_ip)
{
  SockList sl;
  char buf[256];
  int bufsize = 65535;          /*Supposed absolute upper limit */
  int oldbufsize;
  int buflen = sizeof (int);

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

  if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
    oldbufsize = 0;
  if (oldbufsize < bufsize)
    {
#ifdef ESRV_DEBUG
      LOG (llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
#endif
      if (setsockopt (ns->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 (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
#ifdef ESRV_DEBUG
  LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
#endif

  ns->faceset = 0;
  ns->facecache = 0;
  ns->image2 = 0;
  ns->sound = 0;
  ns->exp64 = 0;
  ns->monitor_spells = 0;
  ns->mapmode = Map0Cmd;
  ns->darkness = 1;
  ns->status = Ns_Add;
  ns->mapx = 11;
  ns->mapy = 11;
  ns->newmapcmd = 0;
  ns->itemcmd = 1;              /* Default is version item1 command */
  ns->ext_mapinfos = 0;         /*extendedmapinfo datas */
  ns->EMI_smooth = 0;
  ns->look_position = 0;
  ns->update_look = 0;
  ns->has_readable_type = 0;
  ns->supported_readables = 0;
  ns->monitor_spells = 0;
  ns->mapinfocmd = 0;
  ns->extcmd = 0;
  ns->extmap = 0;

  /* we should really do some checking here - if total clients overflows
   * we need to do something more intelligent, because client id's will start
   * duplicating (not likely in normal cases, but malicous attacks that
   * just open and close connections could get this total up.
   */
  ns->inbuf.len = 0;
  ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF);
  /* Basic initialization. Needed because we do a check in
   * HandleClient for oldsocketmode without checking the
   * length of data.
   */
  memset (ns->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF);
  memset (&ns->lastmap, 0, sizeof (struct Map));
  memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
  memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
  memset (&ns->stats, 0, sizeof (struct statsinfo));
  /* 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.
   */
  ns->faces_sent[0] = NS_FACESENT_FACE;

  ns->outputbuffer.start = 0;
  ns->outputbuffer.len = 0;
  ns->can_write = 1;
  ns->password_fails = 0;

  ns->current_map = 0;
  ns->current_x = 0;
  ns->current_y = 0;
  ns->client[0] = 0;
  ns->buggy_mapscroll = 0;

  ns->sent_scroll = 0;
  ns->host = strdup_local (from_ip);
  sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
  sl.buf = (unsigned char *) buf;
  sl.len = strlen ((char *) buf);
  Send_With_Handling (ns, &sl);
#ifdef CS_LOGSTATS
  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
}


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

#ifdef HAVE_SYSCONF
  socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
#else
# ifdef HAVE_GETDTABLESIZE
  socket_info.max_filedescriptor = getdtablesize ();
# else
  "Unable to find usable function to get max filedescriptors";
# endif
#endif

  socket_info.timeout.tv_sec = 0;
  socket_info.timeout.tv_usec = 0;
  socket_info.nconns = 0;

#ifdef CS_LOGSTATS
  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);
#endif

  LOG (llevDebug, "Initialize new client/server data\n");
  socket_info.nconns = 1;
  init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
  init_sockets[0].faces_sent = NULL;    /* unused */
  socket_info.allocated_sockets = 1;

  protox = getprotobyname ("tcp");
  if (protox == NULL)
    {
      LOG (llevError, "init_ericserver: Error getting protox\n");
      return;
    }
  init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
  if (init_sockets[0].fd == -1)
    {
      LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
      exit (-1);
    }
  insock.sin_family = AF_INET;
  insock.sin_port = htons (settings.csport);
  insock.sin_addr.s_addr = htonl (INADDR_ANY);

  linger_opt.l_onoff = 0;
  linger_opt.l_linger = 0;
  if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
    {
      LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
    }

/* Would be nice to have an autoconf check for this.  It appears that
 * these functions are both using the same calling syntax, just one
 * of them needs extra valus passed.
 */
#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
        defined(__sun__) || defined(__linux__) || defined(SVR4) || \
        defined(__FreeBSD__) || defined(__OpenBSD__) || \
        defined(WIN32) /* ---win32 add this here */  || \
        defined(__GNU__)        /* HURD */
  {
    int tmp = 1;

    if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
      {
        LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
      }
  }
#else
  if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0))
    {
      LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
    }
#endif

  if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
    {
      LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
      close (init_sockets[0].fd);
      exit (-1);
    }
  if (listen (init_sockets[0].fd, 5) == (-1))
    {
      LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
      close (init_sockets[0].fd);
      exit (-1);
    }
  init_sockets[0].status = Ns_Add;
  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 ();
  free (init_sockets);
}

/**
 * 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 (NewSocket * ns)
{
  if (close (ns->fd))
    {

#ifdef ESRV_DEBUG
      LOG (llevDebug, "Error closing socket %d\n", ns->fd);
#endif
    }

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

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

  free (ns->host);
  free (ns->inbuf.buf);
}

/** Sends the 'goodbye' command to the player, and closes connection. */
void
final_free_player (player *pl)
{
  cs_write_string (&pl->socket, "goodbye", 8);
  free_newsocket (&pl->socket);
  free_player (pl);
}
Revision:	1.10
Committed:	Mon Dec 11 19:46:47 2006 UTC (17 years, 6 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.9:	+10 -49 lines
Log Message:	removed #ifn?def WIN32 from all files
#	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			#ifndef __CEXTRACT__
38	root	1.7	# include <sproto.h>
39	elmex	1.1	#endif
40	pippijn	1.10	#include <sys/types.h>
41			#include <sys/time.h>
42			#include <sys/socket.h>
43			#include <netinet/in.h>
44			#include <netdb.h>
45	elmex	1.1
46			#ifdef HAVE_UNISTD_H
47	root	1.7	# include <unistd.h>
48	elmex	1.1	#endif
49
50			#ifdef HAVE_ARPA_INET_H
51	root	1.7	# include <arpa/inet.h>
52	elmex	1.1	#endif
53			#include <newserver.h>
54
55			Socket_Info socket_info;
56			NewSocket *init_sockets;
57
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	1.7	void
64			InitConnection (NewSocket * ns, const char *from_ip)
65	elmex	1.1	{
66	root	1.7	SockList sl;
67			char buf[256];
68			int bufsize = 65535; /Supposed absolute upper limit /
69			int oldbufsize;
70			int buflen = sizeof (int);
71
72			if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1)
73			{
74			LOG (llevError, "InitConnection: Error on fcntl.\n");
75	elmex	1.1	}
76
77	root	1.7	if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen) == -1)
78			oldbufsize = 0;
79			if (oldbufsize < bufsize)
80			{
81	elmex	1.1	#ifdef ESRV_DEBUG
82	root	1.7	LOG (llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
83	elmex	1.1	#endif
84	root	1.7	if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
85			{
86			LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
87	root	1.5	}
88	elmex	1.1	}
89	root	1.7	buflen = sizeof (oldbufsize);
90			getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen);
91	elmex	1.1	#ifdef ESRV_DEBUG
92	root	1.7	LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
93	elmex	1.1	#endif
94
95	root	1.7	ns->faceset = 0;
96			ns->facecache = 0;
97			ns->image2 = 0;
98			ns->sound = 0;
99			ns->exp64 = 0;
100			ns->monitor_spells = 0;
101			ns->mapmode = Map0Cmd;
102			ns->darkness = 1;
103			ns->status = Ns_Add;
104			ns->mapx = 11;
105			ns->mapy = 11;
106			ns->newmapcmd = 0;
107			ns->itemcmd = 1; /* Default is version item1 command */
108			ns->ext_mapinfos = 0; /extendedmapinfo datas /
109			ns->EMI_smooth = 0;
110			ns->look_position = 0;
111			ns->update_look = 0;
112			ns->has_readable_type = 0;
113			ns->supported_readables = 0;
114			ns->monitor_spells = 0;
115			ns->mapinfocmd = 0;
116			ns->extcmd = 0;
117			ns->extmap = 0;
118
119			/* we should really do some checking here - if total clients overflows
120			* we need to do something more intelligent, because client id's will start
121			* duplicating (not likely in normal cases, but malicous attacks that
122			* just open and close connections could get this total up.
123			*/
124			ns->inbuf.len = 0;
125			ns->inbuf.buf = (unsigned char ) malloc (sizeof (unsigned char) MAXSOCKBUF);
126			/* Basic initialization. Needed because we do a check in
127			* HandleClient for oldsocketmode without checking the
128			* length of data.
129			*/
130			memset (ns->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF);
131			memset (&ns->lastmap, 0, sizeof (struct Map));
132			memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
133			memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
134			memset (&ns->stats, 0, sizeof (struct statsinfo));
135			/* Do this so we don't send a face command for the client for
136			* this face. Face 0 is sent to the client to say clear
137			* face information.
138			*/
139			ns->faces_sent[0] = NS_FACESENT_FACE;
140
141			ns->outputbuffer.start = 0;
142			ns->outputbuffer.len = 0;
143			ns->can_write = 1;
144			ns->password_fails = 0;
145
146			ns->current_map = 0;
147			ns->current_x = 0;
148			ns->current_y = 0;
149			ns->client[0] = 0;
150			ns->buggy_mapscroll = 0;
151
152			ns->sent_scroll = 0;
153			ns->host = strdup_local (from_ip);
154			sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
155			sl.buf = (unsigned char *) buf;
156			sl.len = strlen ((char *) buf);
157			Send_With_Handling (ns, &sl);
158	elmex	1.1	#ifdef CS_LOGSTATS
159	root	1.7	if (socket_info.nconns > cst_tot.max_conn)
160			cst_tot.max_conn = socket_info.nconns;
161			if (socket_info.nconns > cst_lst.max_conn)
162			cst_lst.max_conn = socket_info.nconns;
163	elmex	1.1	#endif
164			}
165
166
167			/** This sets up the socket and reads all the image information into memory. */
168	root	1.7	void
169			init_ericserver (void)
170	elmex	1.1	{
171	root	1.7	struct sockaddr_in insock;
172			struct protoent *protox;
173			struct linger linger_opt;
174
175	pippijn	1.10	#ifdef HAVE_SYSCONF
176	root	1.7	socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
177	pippijn	1.10	#else
178			# ifdef HAVE_GETDTABLESIZE
179			socket_info.max_filedescriptor = getdtablesize ();
180	root	1.7	# else
181	elmex	1.1	"Unable to find usable function to get max filedescriptors";
182	root	1.7	# endif
183	pippijn	1.10	#endif
184	elmex	1.1
185	root	1.7	socket_info.timeout.tv_sec = 0;
186			socket_info.timeout.tv_usec = 0;
187			socket_info.nconns = 0;
188	elmex	1.1
189			#ifdef CS_LOGSTATS
190	root	1.7	memset (&cst_tot, 0, sizeof (CS_Stats));
191			memset (&cst_lst, 0, sizeof (CS_Stats));
192			cst_tot.time_start = time (NULL);
193			cst_lst.time_start = time (NULL);
194	elmex	1.1	#endif
195
196	root	1.7	LOG (llevDebug, "Initialize new client/server data\n");
197			socket_info.nconns = 1;
198			init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
199			init_sockets[0].faces_sent = NULL; /* unused */
200			socket_info.allocated_sockets = 1;
201
202			protox = getprotobyname ("tcp");
203			if (protox == NULL)
204			{
205			LOG (llevError, "init_ericserver: Error getting protox\n");
206			return;
207	elmex	1.1	}
208	root	1.7	init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
209			if (init_sockets[0].fd == -1)
210			{
211			LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
212			exit (-1);
213	elmex	1.1	}
214	root	1.7	insock.sin_family = AF_INET;
215			insock.sin_port = htons (settings.csport);
216			insock.sin_addr.s_addr = htonl (INADDR_ANY);
217
218			linger_opt.l_onoff = 0;
219			linger_opt.l_linger = 0;
220			if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
221			{
222			LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
223	elmex	1.1	}
224	root	1.7
225	elmex	1.1	/* Would be nice to have an autoconf check for this. It appears that
226			* these functions are both using the same calling syntax, just one
227			* of them needs extra valus passed.
228			*/
229			#if defined(__osf__) \|\| defined(hpux) \|\| defined(sgi) \|\| defined(NeXT) \|\| \
230			defined(__sun__) \|\| defined(__linux__) \|\| defined(SVR4) \|\| \
231			defined(__FreeBSD__) \|\| defined(__OpenBSD__) \|\| \
232			defined(WIN32) /* ---win32 add this here */ \|\| \
233	root	1.7	defined(__GNU__) /* HURD */
234			{
235			int tmp = 1;
236
237			if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
238			{
239			LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
240			}
241			}
242	elmex	1.1	#else
243	root	1.7	if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0))
244			{
245			LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
246	elmex	1.1	}
247			#endif
248
249	root	1.7	if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
250			{
251			LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
252			close (init_sockets[0].fd);
253			exit (-1);
254	elmex	1.1	}
255	root	1.7	if (listen (init_sockets[0].fd, 5) == (-1))
256			{
257			LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
258			close (init_sockets[0].fd);
259			exit (-1);
260	elmex	1.1	}
261	root	1.7	init_sockets[0].status = Ns_Add;
262			read_client_images ();
263	elmex	1.1	}
264
265
266			/*******************************************************************************
267			*
268			* Start of functions dealing with freeing of the data.
269			*
270			******************************************************************************/
271
272			/** Free's all the memory that ericserver allocates. */
273	root	1.7	void
274			free_all_newserver (void)
275			{
276			LOG (llevDebug, "Freeing all new client/server information.\n");
277			free_socket_images ();
278			free (init_sockets);
279	elmex	1.1	}
280
281			/**
282			* Frees a socket.
283			* Basically, all we need to do here is free all data structures that
284			* might be associated with the socket. It is up to the caller to
285			* update the list
286			*/
287
288	root	1.7	void
289			free_newsocket (NewSocket * ns)
290	elmex	1.1	{
291	root	1.7	if (close (ns->fd))
292			{
293	elmex	1.1
294			#ifdef ESRV_DEBUG
295	root	1.7	LOG (llevDebug, "Error closing socket %d\n", ns->fd);
296	elmex	1.1	#endif
297			}
298	root	1.9
299	root	1.7	if (ns->stats.range)
300			free (ns->stats.range);
301	root	1.9
302	root	1.7	if (ns->stats.title)
303			free (ns->stats.title);
304	root	1.9
305	root	1.7	free (ns->host);
306			free (ns->inbuf.buf);
307	elmex	1.1	}
308
309			/** Sends the 'goodbye' command to the player, and closes connection. */
310	root	1.7	void
311			final_free_player (player *pl)
312	elmex	1.1	{
313	root	1.7	cs_write_string (&pl->socket, "goodbye", 8);
314			free_newsocket (&pl->socket);
315			free_player (pl);
316	elmex	1.1	}