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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.2 by root, Thu Aug 17 20:23:32 2006 UTC vs.
Revision 1.27 by root, Thu Dec 21 06:12:37 2006 UTC

1/*
2 * static char *rcsid_init_c =
3 * "$Id: init.C,v 1.2 2006/08/17 20:23:32 root Exp $";
4 */
5
6/* 1/*
7 CrossFire, A Multiplayer game for X-windows 2 CrossFire, A Multiplayer game for X-windows
8 3
9 Copyright (C) 2001 Mark Wedel 4 Copyright (C) 2001 Mark Wedel
10 Copyright (C) 1992 Frank Tore Johansen 5 Copyright (C) 1992 Frank Tore Johansen
… …
21 16
22 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software 18 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 20
26 The author can be reached via e-mail to crossfire-devel@real-time.com 21 The author can be reached via e-mail to <crossfire@schmorp.de>
27*/ 22*/
28 23
29/** 24/**
30 * \file 25 * \file
31 * Socket general functions 26 * Socket general functions
… …
35 * Mainly deals with initialization and higher level socket 30 * Mainly deals with initialization and higher level socket
36 * maintenance (checking for lost connections and if data has arrived.) 31 * maintenance (checking for lost connections and if data has arrived.)
37 * The reading of data is handled in ericserver.c 32 * The reading of data is handled in ericserver.c
38 */ 33 */
39 34
40
41#include <global.h> 35#include <global.h>
42#ifndef __CEXTRACT__
43#include <sproto.h> 36#include <sproto.h>
44#endif
45#ifndef WIN32 /* ---win32 exclude include files */
46#include <sys/types.h> 37#include <sys/types.h>
47#include <sys/time.h> 38#include <sys/time.h>
48#include <sys/socket.h> 39#include <sys/socket.h>
49#include <netinet/in.h> 40#include <netinet/in.h>
41#include <netinet/tcp.h>
42#include <netinet/ip.h>
50#include <netdb.h> 43#include <netdb.h>
51#endif /* win32 */
52 44
53#ifdef HAVE_UNISTD_H
54#include <unistd.h> 45#include <unistd.h>
55#endif
56
57#ifdef HAVE_ARPA_INET_H
58#include <arpa/inet.h> 46#include <arpa/inet.h>
59#endif
60#include <newserver.h>
61 47
62Socket_Info socket_info; 48sockvec clients;
63NewSocket *init_sockets;
64 49
65/** 50/**
66 * Initializes a connection. Really, it just sets up the data structure, 51 * Initializes a connection. Really, it just sets up the data structure,
67 * socket setup is handled elsewhere. We do send a version to the 52 * socket setup is handled elsewhere. We do send a version to the
68 * client. 53 * client.
69 */ 54 */
70void InitConnection(NewSocket *ns, const char *from_ip) 55client::client (int fd, const char *peername)
56: fd (fd), host (strdup (peername)),
57 socket_ev (this, &client::socket_cb),
58 cmd_ev (this, &client::cmd_cb),
59 cc_inv (this), cc_other (this)
71{ 60{
72 SockList sl; 61 {
73 char buf[256];
74 int bufsize=65535; /*Supposed absolute upper limit */
75 int oldbufsize;
76 int buflen=sizeof(int);
77
78#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */
79 int temp = 1;
80
81 if(ioctlsocket(ns->fd, FIONBIO , &temp) == -1)
82 LOG(llevError,"InitConnection: Error on ioctlsocket.\n");
83#else
84 if (fcntl(ns->fd, F_SETFL, O_NONBLOCK)==-1) {
85 LOG(llevError,"InitConnection: Error on fcntl.\n");
86 }
87#endif /* end win32 */
88
89 if (getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, (socklen_t*) &buflen)==-1)
90 oldbufsize=0;
91 if (oldbufsize<bufsize) {
92#ifdef ESRV_DEBUG
93 LOG(llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
94#endif
95 if(setsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&bufsize, sizeof(&bufsize))) {
96 LOG(llevError,"InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
97 }
98 }
99 buflen=sizeof(oldbufsize);
100 getsockopt(ns->fd,SOL_SOCKET,SO_SNDBUF, (char*)&oldbufsize, (socklen_t*) &buflen);
101#ifdef ESRV_DEBUG
102 LOG(llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
103#endif
104
105 ns->faceset = 0;
106 ns->facecache = 0;
107 ns->image2 = 0;
108 ns->sound = 0;
109 ns->exp64 = 0;
110 ns->monitor_spells = 0;
111 ns->mapmode = Map0Cmd;
112 ns->darkness = 1;
113 ns->status = Ns_Add;
114 ns->comment = NULL;
115 ns->old_mode = (Old_Mode) 0;
116 ns->mapx = 11;
117 ns->mapy = 11;
118 ns->newmapcmd= 0;
119 ns->itemcmd = 1; /* Default is version item1 command*/
120 ns->ext_mapinfos=0; /*extendedmapinfo datas*/
121 ns->EMI_smooth=0;
122 ns->look_position = 0;
123 ns->update_look = 0;
124 ns->has_readable_type = 0;
125 ns->supported_readables = 0;
126 ns->monitor_spells = 0;
127 ns->mapinfocmd = 0;
128 ns->extcmd = 0;
129
130 /* we should really do some checking here - if total clients overflows
131 * we need to do something more intelligent, because client id's will start
132 * duplicating (not likely in normal cases, but malicous attacks that
133 * just open and close connections could get this total up.
134 */
135 ns->inbuf.len=0;
136 ns->inbuf.buf= (unsigned char*) malloc( sizeof( unsigned char ) * MAXSOCKBUF );
137 /* Basic initialization. Needed because we do a check in
138 * HandleClient for oldsocketmode without checking the
139 * length of data.
140 */
141 memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF );
142 memset(&ns->lastmap,0,sizeof(struct Map));
143 memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent));
144 memset(&ns->anims_sent,0,sizeof(ns->anims_sent));
145 memset(&ns->stats,0,sizeof(struct statsinfo));
146 /* Do this so we don't send a face command for the client for
147 * this face. Face 0 is sent to the client to say clear
148 * face information.
149 */
150 ns->faces_sent[0] = NS_FACESENT_FACE;
151
152 ns->outputbuffer.start=0;
153 ns->outputbuffer.len=0;
154 ns->can_write=1;
155 ns->password_fails = 0;
156
157 ns->current_map = 0;
158 ns->current_x = 0;
159 ns->current_y = 0;
160
161 ns->sent_scroll=0;
162 ns->host=strdup_local(from_ip);
163 sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO);
164 sl.buf=(unsigned char*)buf;
165 sl.len=strlen((char*)buf);
166 Send_With_Handling(ns, &sl);
167#ifdef CS_LOGSTATS
168 if (socket_info.nconns>cst_tot.max_conn)
169 cst_tot.max_conn = socket_info.nconns;
170 if (socket_info.nconns>cst_lst.max_conn)
171 cst_lst.max_conn = socket_info.nconns;
172#endif
173}
174
175
176/** This sets up the socket and reads all the image information into memory. */
177void init_ericserver(void)
178{
179 struct sockaddr_in insock;
180 struct protoent *protox;
181 struct linger linger_opt; 62 struct linger linger_opt;
182
183#ifdef WIN32 /* ***win32 - we init a windows socket */
184 WSADATA w;
185
186 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */
187 WSAStartup (0x0101,&w); /* this setup all socket stuff */
188 /* ill include no error tests here, winsocket 1.1 should always work */
189 /* except some old win95 versions without tcp/ip stack */
190#else /* non windows */
191
192#ifdef HAVE_SYSCONF
193 socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX);
194#else
195# ifdef HAVE_GETDTABLESIZE
196 socket_info.max_filedescriptor = getdtablesize();
197# else
198 "Unable to find usable function to get max filedescriptors";
199# endif
200#endif
201#endif /* win32 */
202
203 socket_info.timeout.tv_sec = 0;
204 socket_info.timeout.tv_usec = 0;
205 socket_info.nconns=0;
206
207#ifdef CS_LOGSTATS
208 memset(&cst_tot, 0, sizeof(CS_Stats));
209 memset(&cst_lst, 0, sizeof(CS_Stats));
210 cst_tot.time_start=time(NULL);
211 cst_lst.time_start=time(NULL);
212#endif
213
214 LOG(llevDebug,"Initialize new client/server data\n");
215 socket_info.nconns = 1;
216 init_sockets = (NewSocket *) malloc(sizeof(NewSocket));
217 init_sockets[0].faces_sent = NULL; /* unused */
218 socket_info.allocated_sockets=1;
219
220 protox = getprotobyname("tcp");
221 if (protox==NULL) {
222 LOG(llevError,"init_ericserver: Error getting protox\n");
223 return;
224 }
225 init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto);
226 if (init_sockets[0].fd == -1) {
227 LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno));
228 exit(-1);
229 }
230 insock.sin_family = AF_INET;
231 insock.sin_port = htons(settings.csport);
232 insock.sin_addr.s_addr = htonl(INADDR_ANY);
233 63
234 linger_opt.l_onoff = 0; 64 linger_opt.l_onoff = 0;
235 linger_opt.l_linger = 0; 65 linger_opt.l_linger = 0;
236 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, 66
237 sizeof(struct linger))) { 67 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
238 LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno)); 68 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
69 }
70
71 {
72 int val = IPTOS_LOWDELAY;
73
74 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
75 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
76 }
77
78 {
79 int val = 1;
80
81 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
82 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
83 }
84
85#ifdef __linux__
86 {
87 int val;
88
89 // set some very aggressive keepalive parameters
90 val = 10;
91 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
92 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
93
94 val = 5;
95 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
96 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
97
98 val = 1;
99 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
100 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
101 }
102#endif
103
104 {
105 int bufsize = 65535; /*Supposed absolute upper limit */
106 int oldbufsize;
107 int buflen = sizeof (int);
108
109 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
110 LOG (llevError, "InitConnection: Error on fcntl.\n");
111
112 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
113 oldbufsize = 0;
114
115 if (oldbufsize < bufsize)
116 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
117 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
118
119 buflen = sizeof (oldbufsize);
120 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
121 }
122
123 mapmode = Map0Cmd;
124 darkness = 1;
125 mapx = 11;
126 mapy = 11;
127 itemcmd = 1; /* Default is version item1 command */
128
129 faces_sent = salloc0<uint8> (nrofpixmaps);
130
131 /* 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 faces_sent[0] = NS_FACESENT_FACE;
136
137 // socket I/O is low priority
138 // we prefer to have the server run instead of handling client requests
139 socket_ev.prio (PE_PRIO_NORMAL + 1);
140 socket_ev.fd (fd);
141 socket_ev.poll (PE_R);
142
143 // command handling is even lower priority
144 // that way no client can monopolise the server
145 cmd_ev.prio (PE_PRIO_NORMAL + 2);
146
147 // initialisation done, kick it!
148 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
149 flush ();
150
151#if 0//TODO
152 socket_info.nconns++;
153 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
154 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
155#endif
156}
157
158client::~client ()
159{
160 if (pl)
161 pl->socket = 0;
162
163 if (fd >= 0)
164 close (fd);
165
166 sfree<uint8> (faces_sent, nrofpixmaps);
167 free (stats.range);
168 free (stats.title);
169 free (host);
170}
171
172void
173client::destroy ()
174{
175 destroyed = true;
176
177 socket_ev.suspend ();
178 cmd_ev.suspend ();
179}
180
181/** This sets up the socket and reads all the image information into memory. */
182void
183init_ericserver (void)
184{
185 cst_tot.time_start = time (NULL);
186 cst_lst.time_start = time (NULL);
187
188 LOG (llevDebug, "Initialize new client/server data\n");
189
190 read_client_images ();
191}
192
193
194/*******************************************************************************
195 *
196 * Start of functions dealing with freeing of the data.
197 *
198 ******************************************************************************/
199
200/** Free's all the memory that ericserver allocates. */
201void
202free_all_newserver (void)
203{
204 LOG (llevDebug, "Freeing all new client/server information.\n");
205 free_socket_images ();
206}
207
208/** Sends the 'goodbye' command to the player, and closes connection. */
209void
210final_free_player (player *pl)
211{
212 free_player (pl);
213}
214
215client *
216client::create (int fd, const char *peername)
217{
218 if (checkbanned (NULL, peername))
219 {
220 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
221 return 0;
239 } 222 }
240/* Would be nice to have an autoconf check for this. It appears that 223 else
241 * these functions are both using the same calling syntax, just one
242 * of them needs extra valus passed.
243 */
244#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
245 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
246 defined(__FreeBSD__) || defined(__OpenBSD__) || \
247 defined(WIN32) /* ---win32 add this here */ || \
248 defined(__GNU__) /* HURD */
249 { 224 {
250#ifdef WIN32 225 client *ns = new client (dup (fd), peername);
251 char tmp = 1; 226 clients.push_back (ns);
252#else
253 int tmp =1;
254#endif
255 227
256 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { 228 ns->instantiate (); // effectively a nop right now
257 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); 229
258 } 230 INVOKE_CLIENT (CONNECT, ns);
231
232 return ns;
259 } 233 }
260#else
261 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) {
262 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
263 }
264#endif
265
266 if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) {
267 LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno));
268#ifdef WIN32 /* ***win32: close() -> closesocket() */
269 shutdown(init_sockets[0].fd,SD_BOTH);
270 closesocket(init_sockets[0].fd);
271#else
272 close(init_sockets[0].fd);
273#endif /* win32 */
274 exit(-1);
275 }
276 if (listen(init_sockets[0].fd,5) == (-1)) {
277 LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno));
278#ifdef WIN32 /* ***win32: close() -> closesocket() */
279 shutdown(init_sockets[0].fd,SD_BOTH);
280 closesocket(init_sockets[0].fd);
281#else
282 close(init_sockets[0].fd);
283#endif /* win32 */
284 exit(-1);
285 }
286 init_sockets[0].status=Ns_Add;
287 read_client_images();
288} 234}
289 235
290
291/*******************************************************************************
292 *
293 * Start of functions dealing with freeing of the data.
294 *
295 ******************************************************************************/
296
297/** Free's all the memory that ericserver allocates. */
298void free_all_newserver(void)
299{
300 LOG(llevDebug,"Freeing all new client/server information.\n");
301 free_socket_images();
302 free(init_sockets);
303}
304
305/**
306 * Frees a socket.
307 * Basically, all we need to do here is free all data structures that
308 * might be associated with the socket. It is up to the caller to
309 * update the list
310 */
311
312void free_newsocket(NewSocket *ns)
313{
314#ifdef WIN32 /* ***win32: closesocket in windows style */
315 shutdown(ns->fd,SD_BOTH);
316 if (closesocket(ns->fd)) {
317#else
318 if (close(ns->fd)) {
319#endif /* win32 */
320
321#ifdef ESRV_DEBUG
322 LOG(llevDebug,"Error closing socket %d\n", ns->fd);
323#endif
324 }
325 if (ns->stats.range)
326 free(ns->stats.range);
327 if (ns->stats.title)
328 free(ns->stats.title);
329 if (ns->comment)
330 free(ns->comment);
331 free(ns->host);
332 free(ns->inbuf.buf);
333}
334
335/** Sends the 'goodbye' command to the player, and closes connection. */
336void final_free_player(player *pl)
337{
338 cs_write_string(&pl->socket, "goodbye", 8);
339 free_newsocket(&pl->socket);
340 free_player(pl);
341}
342

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