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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.1 by elmex, Sun Aug 13 17:16:05 2006 UTC vs.
Revision 1.31 by root, Mon Dec 25 11:25:50 2006 UTC

1/*
2 * static char *rcsid_init_c =
3 * "$Id: init.C,v 1.1 2006/08/13 17:16:05 elmex 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; 48#include <algorithm>
63NewSocket *init_sockets; 49
50sockvec clients;
64 51
65/** 52/**
66 * Initializes a connection. Really, it just sets up the data structure, 53 * Initializes a connection. Really, it just sets up the data structure,
67 * socket setup is handled elsewhere. We do send a version to the 54 * socket setup is handled elsewhere. We do send a version to the
68 * client. 55 * client.
69 */ 56 */
70void InitConnection(NewSocket *ns, const char *from_ip) 57client::client (int fd, const char *peername)
58: fd (fd), host (strdup (peername)),
59 socket_ev (this, &client::socket_cb),
60 cmd_ev (this, &client::cmd_cb),
61 cc_inv (this), cc_other (this)
71{ 62{
72 SockList sl; 63 {
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
159 ns->sent_scroll=0;
160 ns->host=strdup_local(from_ip);
161 sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO);
162 sl.buf=(unsigned char*)buf;
163 sl.len=strlen((char*)buf);
164 Send_With_Handling(ns, &sl);
165#ifdef CS_LOGSTATS
166 if (socket_info.nconns>cst_tot.max_conn)
167 cst_tot.max_conn = socket_info.nconns;
168 if (socket_info.nconns>cst_lst.max_conn)
169 cst_lst.max_conn = socket_info.nconns;
170#endif
171}
172
173
174/** This sets up the socket and reads all the image information into memory. */
175void init_ericserver(void)
176{
177 struct sockaddr_in insock;
178 struct protoent *protox;
179 struct linger linger_opt; 64 struct linger linger_opt;
180
181#ifdef WIN32 /* ***win32 - we init a windows socket */
182 WSADATA w;
183
184 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */
185 WSAStartup (0x0101,&w); /* this setup all socket stuff */
186 /* ill include no error tests here, winsocket 1.1 should always work */
187 /* except some old win95 versions without tcp/ip stack */
188#else /* non windows */
189
190#ifdef HAVE_SYSCONF
191 socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX);
192#else
193# ifdef HAVE_GETDTABLESIZE
194 socket_info.max_filedescriptor = getdtablesize();
195# else
196 "Unable to find usable function to get max filedescriptors";
197# endif
198#endif
199#endif /* win32 */
200
201 socket_info.timeout.tv_sec = 0;
202 socket_info.timeout.tv_usec = 0;
203 socket_info.nconns=0;
204
205#ifdef CS_LOGSTATS
206 memset(&cst_tot, 0, sizeof(CS_Stats));
207 memset(&cst_lst, 0, sizeof(CS_Stats));
208 cst_tot.time_start=time(NULL);
209 cst_lst.time_start=time(NULL);
210#endif
211
212 LOG(llevDebug,"Initialize new client/server data\n");
213 socket_info.nconns = 1;
214 init_sockets = (NewSocket *) malloc(sizeof(NewSocket));
215 init_sockets[0].faces_sent = NULL; /* unused */
216 socket_info.allocated_sockets=1;
217
218 protox = getprotobyname("tcp");
219 if (protox==NULL) {
220 LOG(llevError,"init_ericserver: Error getting protox\n");
221 return;
222 }
223 init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto);
224 if (init_sockets[0].fd == -1) {
225 LOG(llevError, "Cannot create socket: %s\n", strerror_local(errno));
226 exit(-1);
227 }
228 insock.sin_family = AF_INET;
229 insock.sin_port = htons(settings.csport);
230 insock.sin_addr.s_addr = htonl(INADDR_ANY);
231 65
232 linger_opt.l_onoff = 0; 66 linger_opt.l_onoff = 0;
233 linger_opt.l_linger = 0; 67 linger_opt.l_linger = 0;
234 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, 68
235 sizeof(struct linger))) { 69 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
236 LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror_local(errno)); 70 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
71 }
72
73 {
74 int val = IPTOS_LOWDELAY;
75
76 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
77 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
78 }
79
80 {
81 int val = 1;
82
83 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
84 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
85 }
86
87#ifdef __linux__
88 {
89 int val;
90
91 // set some very aggressive keepalive parameters
92 val = 10;
93 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
94 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
95
96 val = 5;
97 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
98 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
99
100 val = 1;
101 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
102 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
103 }
104#endif
105
106 {
107 int bufsize = 65535; /*Supposed absolute upper limit */
108 int oldbufsize;
109 int buflen = sizeof (int);
110
111 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
112 LOG (llevError, "InitConnection: Error on fcntl.\n");
113
114 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
115 oldbufsize = 0;
116
117 if (oldbufsize < bufsize)
118 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
119 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
120
121 buflen = sizeof (oldbufsize);
122 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
123 }
124
125 state = ST_SETUP;
126 mapmode = Map0Cmd;
127 darkness = 1;
128 mapx = 11;
129 mapy = 11;
130 itemcmd = 1; /* Default is version item1 command */
131
132 faces_sent = salloc0<uint8> (nrofpixmaps);
133
134 /* Do this so we don't send a face command for the client for
135 * this face. Face 0 is sent to the client to say clear
136 * face information.
137 */
138 faces_sent[0] = NS_FACESENT_FACE;
139
140 // socket I/O is low priority
141 // we prefer to have the server run instead of handling client requests
142 socket_ev.prio (PE_PRIO_NORMAL + 1);
143 socket_ev.fd (fd);
144 socket_ev.poll (PE_R);
145
146 // command handling is even lower priority
147 // that way no client can monopolise the server
148 cmd_ev.prio (PE_PRIO_NORMAL + 2);
149
150 // initialisation done, kick it!
151 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
152 flush ();
153
154 // clients are externally referenced by the socket
155 refcnt_inc ();
156 clients.push_back (this);
157
158#if 0//TODO
159 socket_info.nconns++;
160 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
161 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
162#endif
163}
164
165client::~client ()
166{
167 sfree<uint8> (faces_sent, nrofpixmaps);
168 free (stats.range);
169 free (stats.title);
170 free (host);
171}
172
173void
174client::do_destroy ()
175{
176 attachable::do_destroy ();
177
178 sockvec::iterator i = find (clients.begin (), clients.end (), this);
179 if (i != clients.end ())
180 clients.erase (i);
181
182 if (pl)
183 pl->disconnect ();
184
185 if (fd >= 0)
186 close (fd);
187
188 state = ST_DEAD;
189
190 socket_ev.suspend ();
191 cmd_ev.suspend ();
192
193 // socket now longer references us
194 refcnt_dec ();
195}
196
197/** This sets up the socket and reads all the image information into memory. */
198void
199init_ericserver (void)
200{
201 cst_tot.time_start = time (NULL);
202 cst_lst.time_start = time (NULL);
203
204 LOG (llevDebug, "Initialize new client/server data\n");
205
206 read_client_images ();
207}
208
209
210/*******************************************************************************
211 *
212 * Start of functions dealing with freeing of the data.
213 *
214 ******************************************************************************/
215
216/** Free's all the memory that ericserver allocates. */
217void
218free_all_newserver (void)
219{
220 LOG (llevDebug, "Freeing all new client/server information.\n");
221 free_socket_images ();
222}
223
224client *
225client::create (int fd, const char *peername)
226{
227 if (checkbanned (NULL, peername))
228 {
229 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
230 return 0;
237 } 231 }
238/* Would be nice to have an autoconf check for this. It appears that 232 else
239 * these functions are both using the same calling syntax, just one
240 * of them needs extra valus passed.
241 */
242#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
243 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
244 defined(__FreeBSD__) || defined(__OpenBSD__) || \
245 defined(WIN32) /* ---win32 add this here */ || \
246 defined(__GNU__) /* HURD */
247 { 233 {
248#ifdef WIN32 234 client *ns = new client (dup (fd), peername);
249 char tmp = 1;
250#else
251 int tmp =1;
252#endif
253 235
254 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { 236 ns->instantiate (); // effectively a nop right now
255 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); 237
256 } 238 INVOKE_CLIENT (CONNECT, ns);
239
240 return ns;
257 } 241 }
258#else
259 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) {
260 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno));
261 }
262#endif
263
264 if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) {
265 LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror_local(errno));
266#ifdef WIN32 /* ***win32: close() -> closesocket() */
267 shutdown(init_sockets[0].fd,SD_BOTH);
268 closesocket(init_sockets[0].fd);
269#else
270 close(init_sockets[0].fd);
271#endif /* win32 */
272 exit(-1);
273 }
274 if (listen(init_sockets[0].fd,5) == (-1)) {
275 LOG(llevError, "Cannot listen on socket: %s\n", strerror_local(errno));
276#ifdef WIN32 /* ***win32: close() -> closesocket() */
277 shutdown(init_sockets[0].fd,SD_BOTH);
278 closesocket(init_sockets[0].fd);
279#else
280 close(init_sockets[0].fd);
281#endif /* win32 */
282 exit(-1);
283 }
284 init_sockets[0].status=Ns_Add;
285 read_client_images();
286} 242}
287 243
288
289/*******************************************************************************
290 *
291 * Start of functions dealing with freeing of the data.
292 *
293 ******************************************************************************/
294
295/** Free's all the memory that ericserver allocates. */
296void free_all_newserver(void)
297{
298 LOG(llevDebug,"Freeing all new client/server information.\n");
299 free_socket_images();
300 free(init_sockets);
301}
302
303/**
304 * Frees a socket.
305 * Basically, all we need to do here is free all data structures that
306 * might be associated with the socket. It is up to the caller to
307 * update the list
308 */
309
310void free_newsocket(NewSocket *ns)
311{
312#ifdef WIN32 /* ***win32: closesocket in windows style */
313 shutdown(ns->fd,SD_BOTH);
314 if (closesocket(ns->fd)) {
315#else
316 if (close(ns->fd)) {
317#endif /* win32 */
318
319#ifdef ESRV_DEBUG
320 LOG(llevDebug,"Error closing socket %d\n", ns->fd);
321#endif
322 }
323 if (ns->stats.range)
324 free(ns->stats.range);
325 if (ns->stats.title)
326 free(ns->stats.title);
327 if (ns->comment)
328 free(ns->comment);
329 free(ns->host);
330 free(ns->inbuf.buf);
331}
332
333/** Sends the 'goodbye' command to the player, and closes connection. */
334void final_free_player(player *pl)
335{
336 cs_write_string(&pl->socket, "goodbye", 8);
337 free_newsocket(&pl->socket);
338 free_player(pl);
339}
340

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