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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 1.28 by root, Thu Dec 21 23:37:06 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; 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
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; 62 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 63
232 linger_opt.l_onoff = 0; 64 linger_opt.l_onoff = 0;
233 linger_opt.l_linger = 0; 65 linger_opt.l_linger = 0;
234 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, 66
235 sizeof(struct linger))) { 67 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
236 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 state = ST_SETUP;
124 mapmode = Map0Cmd;
125 darkness = 1;
126 mapx = 11;
127 mapy = 11;
128 itemcmd = 1; /* Default is version item1 command */
129
130 faces_sent = salloc0<uint8> (nrofpixmaps);
131
132 /* Do this so we don't send a face command for the client for
133 * this face. Face 0 is sent to the client to say clear
134 * face information.
135 */
136 faces_sent[0] = NS_FACESENT_FACE;
137
138 // socket I/O is low priority
139 // we prefer to have the server run instead of handling client requests
140 socket_ev.prio (PE_PRIO_NORMAL + 1);
141 socket_ev.fd (fd);
142 socket_ev.poll (PE_R);
143
144 // command handling is even lower priority
145 // that way no client can monopolise the server
146 cmd_ev.prio (PE_PRIO_NORMAL + 2);
147
148 // initialisation done, kick it!
149 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
150 flush ();
151
152#if 0//TODO
153 socket_info.nconns++;
154 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
155 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
156#endif
157}
158
159client::~client ()
160{
161 if (pl)
162 pl->ns = 0;
163
164 if (fd >= 0)
165 close (fd);
166
167 sfree<uint8> (faces_sent, nrofpixmaps);
168 free (stats.range);
169 free (stats.title);
170 free (host);
171}
172
173void
174client::destroy ()
175{
176 state = ST_DEAD;
177
178 socket_ev.suspend ();
179 cmd_ev.suspend ();
180}
181
182/** This sets up the socket and reads all the image information into memory. */
183void
184init_ericserver (void)
185{
186 cst_tot.time_start = time (NULL);
187 cst_lst.time_start = time (NULL);
188
189 LOG (llevDebug, "Initialize new client/server data\n");
190
191 read_client_images ();
192}
193
194
195/*******************************************************************************
196 *
197 * Start of functions dealing with freeing of the data.
198 *
199 ******************************************************************************/
200
201/** Free's all the memory that ericserver allocates. */
202void
203free_all_newserver (void)
204{
205 LOG (llevDebug, "Freeing all new client/server information.\n");
206 free_socket_images ();
207}
208
209/** Sends the 'goodbye' command to the player, and closes connection. */
210void
211final_free_player (player *pl)
212{
213 free_player (pl);
214}
215
216client *
217client::create (int fd, const char *peername)
218{
219 if (checkbanned (NULL, peername))
220 {
221 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
222 return 0;
237 } 223 }
238/* Would be nice to have an autoconf check for this. It appears that 224 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 { 225 {
248#ifdef WIN32 226 client *ns = new client (dup (fd), peername);
249 char tmp = 1; 227 clients.push_back (ns);
250#else
251 int tmp =1;
252#endif
253 228
254 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { 229 ns->instantiate (); // effectively a nop right now
255 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror_local(errno)); 230
256 } 231 INVOKE_CLIENT (CONNECT, ns);
232
233 return ns;
257 } 234 }
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} 235}
287 236
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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