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>

Socket_Info socket_info;
client_socket *init_sockets;

client_socket::client_socket ()
{
}

client_socket::~client_socket ()
{
}

/**
 * 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
client_socket::init (const char *from_ip)
{
  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);
#ifdef ESRV_DEBUG
  LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
#endif

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

  /* Basic initialization. Needed because we do a check in
   * HandleClient for oldsocketmode without checking the
   * length of data.
   */
  memset (&lastmap, 0, sizeof (struct Map));
  memset (faces_sent, 0, faces_sent_len * sizeof (*faces_sent));
  memset (&anims_sent, 0, sizeof (anims_sent));
  memset (&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.
   */
  faces_sent[0] = NS_FACESENT_FACE;

  outputbuffer.start = 0;
  outputbuffer.len = 0;
  can_write = 1;
  password_fails = 0;

  current_map = 0;
  current_x = 0;
  current_y = 0;
  client[0] = 0;
  buggy_mapscroll = 0;

  sent_scroll = 0;
  host = strdup_local (from_ip);

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

  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;
}


/** 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;

  socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);

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

  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");
  socket_info.nconns = 1;
  init_sockets = (client_socket *) malloc (sizeof (client_socket));
  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));

  {
    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));
  }

  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 (client_socket *ns)
{
  close (ns->fd);

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

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

  free (ns->host);
}

/** 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);
}

Revision:	1.15
Committed:	Thu Dec 14 02:37:37 2006 UTC (19 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.14:	+58 -55 lines
Log Message:	moar\! rewrite\!
#	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			Socket_Info socket_info;
54	root	1.15	client_socket *init_sockets;
55
56			client_socket::client_socket ()
57			{
58			}
59
60			client_socket::~client_socket ()
61			{
62			}
63	elmex	1.1
64			/**
65			* Initializes a connection. Really, it just sets up the data structure,
66			* socket setup is handled elsewhere. We do send a version to the
67			* client.
68			*/
69	root	1.7	void
70	root	1.15	client_socket::init (const char *from_ip)
71	elmex	1.1	{
72	root	1.7	int bufsize = 65535; /Supposed absolute upper limit /
73			int oldbufsize;
74			int buflen = sizeof (int);
75
76	root	1.15	if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
77	root	1.11	LOG (llevError, "InitConnection: Error on fcntl.\n");
78	elmex	1.1
79	root	1.15	if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen) == -1)
80	root	1.7	oldbufsize = 0;
81	root	1.11
82	root	1.7	if (oldbufsize < bufsize)
83	root	1.15	if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
84	root	1.11	LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
85
86	root	1.7	buflen = sizeof (oldbufsize);
87	root	1.15	getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char ) &oldbufsize, (socklen_t ) & buflen);
88	elmex	1.1	#ifdef ESRV_DEBUG
89	root	1.7	LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
90	elmex	1.1	#endif
91
92	root	1.15	faceset = 0;
93			facecache = 0;
94			image2 = 0;
95			sound = 0;
96			exp64 = 0;
97			monitor_spells = 0;
98			mapmode = Map0Cmd;
99			darkness = 1;
100			status = Ns_Add;
101			mapx = 11;
102			mapy = 11;
103			newmapcmd = 0;
104			itemcmd = 1; /* Default is version item1 command */
105			ext_mapinfos = 0; /extendedmapinfo datas /
106			EMI_smooth = 0;
107			look_position = 0;
108			update_look = 0;
109			has_readable_type = 0;
110			supported_readables = 0;
111			monitor_spells = 0;
112			mapinfocmd = 0;
113			extcmd = 0;
114			extmap = 0;
115	root	1.7
116			/* we should really do some checking here - if total clients overflows
117			* we need to do something more intelligent, because client id's will start
118			* duplicating (not likely in normal cases, but malicous attacks that
119			* just open and close connections could get this total up.
120			*/
121	root	1.15	inbuf_len = 0;
122	root	1.12
123	root	1.7	/* Basic initialization. Needed because we do a check in
124			* HandleClient for oldsocketmode without checking the
125			* length of data.
126			*/
127	root	1.15	memset (&lastmap, 0, sizeof (struct Map));
128			memset (faces_sent, 0, faces_sent_len * sizeof (*faces_sent));
129			memset (&anims_sent, 0, sizeof (anims_sent));
130			memset (&stats, 0, sizeof (struct statsinfo));
131	root	1.7	/* Do this so we don't send a face command for the client for
132			* this face. Face 0 is sent to the client to say clear
133			* face information.
134			*/
135	root	1.15	faces_sent[0] = NS_FACESENT_FACE;
136	root	1.7
137	root	1.15	outputbuffer.start = 0;
138			outputbuffer.len = 0;
139			can_write = 1;
140			password_fails = 0;
141
142			current_map = 0;
143			current_x = 0;
144			current_y = 0;
145			client[0] = 0;
146			buggy_mapscroll = 0;
147	root	1.7
148	root	1.15	sent_scroll = 0;
149			host = strdup_local (from_ip);
150	root	1.13
151			{
152	root	1.14	packet sl;
153	root	1.13	sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
154	root	1.15	send_packet (sl);
155	root	1.13	}
156
157	root	1.7	if (socket_info.nconns > cst_tot.max_conn)
158			cst_tot.max_conn = socket_info.nconns;
159			if (socket_info.nconns > cst_lst.max_conn)
160			cst_lst.max_conn = socket_info.nconns;
161	elmex	1.1	}
162
163
164			/** This sets up the socket and reads all the image information into memory. */
165	root	1.7	void
166			init_ericserver (void)
167	elmex	1.1	{
168	root	1.7	struct sockaddr_in insock;
169			struct protoent *protox;
170			struct linger linger_opt;
171
172			socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
173	elmex	1.1
174	root	1.7	socket_info.timeout.tv_sec = 0;
175			socket_info.timeout.tv_usec = 0;
176			socket_info.nconns = 0;
177	elmex	1.1
178	root	1.7	memset (&cst_tot, 0, sizeof (CS_Stats));
179			memset (&cst_lst, 0, sizeof (CS_Stats));
180			cst_tot.time_start = time (NULL);
181			cst_lst.time_start = time (NULL);
182	elmex	1.1
183	root	1.7	LOG (llevDebug, "Initialize new client/server data\n");
184			socket_info.nconns = 1;
185	root	1.15	init_sockets = (client_socket *) malloc (sizeof (client_socket));
186	root	1.7	init_sockets[0].faces_sent = NULL; /* unused */
187			socket_info.allocated_sockets = 1;
188
189			protox = getprotobyname ("tcp");
190			if (protox == NULL)
191			{
192			LOG (llevError, "init_ericserver: Error getting protox\n");
193			return;
194	elmex	1.1	}
195	root	1.11
196	root	1.7	init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
197			if (init_sockets[0].fd == -1)
198			{
199			LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
200			exit (-1);
201	elmex	1.1	}
202	root	1.11
203	root	1.7	insock.sin_family = AF_INET;
204			insock.sin_port = htons (settings.csport);
205			insock.sin_addr.s_addr = htonl (INADDR_ANY);
206
207			linger_opt.l_onoff = 0;
208			linger_opt.l_linger = 0;
209			if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
210	root	1.11	LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
211	root	1.7
212			{
213			int tmp = 1;
214
215			if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
216	root	1.11	LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
217	root	1.7	}
218	elmex	1.1
219	root	1.7	if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
220			{
221			LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
222			close (init_sockets[0].fd);
223			exit (-1);
224	elmex	1.1	}
225	root	1.11
226	root	1.7	if (listen (init_sockets[0].fd, 5) == (-1))
227			{
228			LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
229			close (init_sockets[0].fd);
230			exit (-1);
231	elmex	1.1	}
232	root	1.11
233	root	1.7	init_sockets[0].status = Ns_Add;
234			read_client_images ();
235	elmex	1.1	}
236
237
238			/*******************************************************************************
239			*
240			* Start of functions dealing with freeing of the data.
241			*
242			******************************************************************************/
243
244			/** Free's all the memory that ericserver allocates. */
245	root	1.7	void
246			free_all_newserver (void)
247			{
248			LOG (llevDebug, "Freeing all new client/server information.\n");
249			free_socket_images ();
250			free (init_sockets);
251	elmex	1.1	}
252
253			/**
254			* Frees a socket.
255			* Basically, all we need to do here is free all data structures that
256			* might be associated with the socket. It is up to the caller to
257			* update the list
258			*/
259
260	root	1.7	void
261	root	1.15	free_newsocket (client_socket *ns)
262	elmex	1.1	{
263	root	1.11	close (ns->fd);
264	root	1.9
265	root	1.7	if (ns->stats.range)
266			free (ns->stats.range);
267	root	1.9
268	root	1.7	if (ns->stats.title)
269			free (ns->stats.title);
270	root	1.9
271	root	1.7	free (ns->host);
272	elmex	1.1	}
273
274			/** Sends the 'goodbye' command to the player, and closes connection. */
275	root	1.7	void
276			final_free_player (player *pl)
277	elmex	1.1	{
278	root	1.13	pl->socket.send_packet ("goodbye");
279	root	1.7	free_newsocket (&pl->socket);
280			free_player (pl);
281	elmex	1.1	}
282	root	1.13