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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.6 by root, Wed Aug 30 16:30:37 2006 UTC vs.
Revision 1.34 by root, Sun Jan 7 02:39:15 2007 UTC

1/*
2 * static char *rcsid_init_c =
3 * "$Id: init.C,v 1.6 2006/08/30 16:30:37 root Exp $";
4 */
5
6/* 1/*
7 CrossFire, A Multiplayer game for X-windows 2 CrossFire, A Multiplayer game for X-windows
8 3
4 Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
9 Copyright (C) 2001 Mark Wedel 5 Copyright (C) 2001 Mark Wedel
10 Copyright (C) 1992 Frank Tore Johansen 6 Copyright (C) 1992 Frank Tore Johansen
11 7
12 This program is free software; you can redistribute it and/or modify 8 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by 9 it under the terms of the GNU General Public License as published by
… …
21 17
22 You should have received a copy of the GNU General Public License 18 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software 19 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 21
26 The author can be reached via e-mail to crossfire-devel@real-time.com 22 The author can be reached via e-mail to <crossfire@schmorp.de>
27*/ 23*/
28 24
29/** 25/**
30 * \file 26 * \file
31 * Socket general functions 27 * Socket general functions
… …
35 * Mainly deals with initialization and higher level socket 31 * Mainly deals with initialization and higher level socket
36 * maintenance (checking for lost connections and if data has arrived.) 32 * maintenance (checking for lost connections and if data has arrived.)
37 * The reading of data is handled in ericserver.c 33 * The reading of data is handled in ericserver.c
38 */ 34 */
39 35
40
41#include <global.h> 36#include <global.h>
42#ifndef __CEXTRACT__
43#include <sproto.h> 37#include <sproto.h>
44#endif
45#ifndef WIN32 /* ---win32 exclude include files */
46#include <sys/types.h> 38#include <sys/types.h>
47#include <sys/time.h> 39#include <sys/time.h>
48#include <sys/socket.h> 40#include <sys/socket.h>
49#include <netinet/in.h> 41#include <netinet/in.h>
42#include <netinet/tcp.h>
43#include <netinet/ip.h>
50#include <netdb.h> 44#include <netdb.h>
51#endif /* win32 */
52 45
53#ifdef HAVE_UNISTD_H
54#include <unistd.h> 46#include <unistd.h>
55#endif
56
57#ifdef HAVE_ARPA_INET_H
58#include <arpa/inet.h> 47#include <arpa/inet.h>
59#endif
60#include <newserver.h>
61 48
62Socket_Info socket_info; 49#include <algorithm>
63NewSocket *init_sockets; 50
51sockvec clients;
64 52
65/** 53/**
66 * Initializes a connection. Really, it just sets up the data structure, 54 * Initializes a connection. Really, it just sets up the data structure,
67 * socket setup is handled elsewhere. We do send a version to the 55 * socket setup is handled elsewhere. We do send a version to the
68 * client. 56 * client.
69 */ 57 */
70void InitConnection(NewSocket *ns, const char *from_ip) 58client::client (int fd, const char *peername)
59: fd (fd), host (strdup (peername)),
60 socket_ev (this, &client::socket_cb),
61 cmd_ev (this, &client::cmd_cb),
62 cc_inv (this), cc_other (this)
71{ 63{
72 SockList sl; 64 refcnt_inc (); // the socket is an external reference
73 char buf[256];
74 int bufsize=65535; /*Supposed absolute upper limit */
75 int oldbufsize;
76 int buflen=sizeof(int);
77 65
78#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */ 66 {
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 ns->extmap = 0;
130
131 /* we should really do some checking here - if total clients overflows
132 * we need to do something more intelligent, because client id's will start
133 * duplicating (not likely in normal cases, but malicous attacks that
134 * just open and close connections could get this total up.
135 */
136 ns->inbuf.len=0;
137 ns->inbuf.buf= (unsigned char*) malloc( sizeof( unsigned char ) * MAXSOCKBUF );
138 /* Basic initialization. Needed because we do a check in
139 * HandleClient for oldsocketmode without checking the
140 * length of data.
141 */
142 memset( ns->inbuf.buf, 0, sizeof( unsigned char ) * MAXSOCKBUF );
143 memset(&ns->lastmap,0,sizeof(struct Map));
144 memset(ns->faces_sent, 0, ns->faces_sent_len*sizeof(*ns->faces_sent));
145 memset(&ns->anims_sent,0,sizeof(ns->anims_sent));
146 memset(&ns->stats,0,sizeof(struct statsinfo));
147 /* Do this so we don't send a face command for the client for
148 * this face. Face 0 is sent to the client to say clear
149 * face information.
150 */
151 ns->faces_sent[0] = NS_FACESENT_FACE;
152
153 ns->outputbuffer.start=0;
154 ns->outputbuffer.len=0;
155 ns->can_write=1;
156 ns->password_fails = 0;
157
158 ns->current_map = 0;
159 ns->current_x = 0;
160 ns->current_y = 0;
161 ns->client[0] = 0;
162 ns->buggy_mapscroll = 0;
163
164 ns->sent_scroll=0;
165 ns->host=strdup_local(from_ip);
166 sprintf((char*)buf, "version %d %d %s\n", VERSION_CS,VERSION_SC, VERSION_INFO);
167 sl.buf=(unsigned char*)buf;
168 sl.len=strlen((char*)buf);
169 Send_With_Handling(ns, &sl);
170#ifdef CS_LOGSTATS
171 if (socket_info.nconns>cst_tot.max_conn)
172 cst_tot.max_conn = socket_info.nconns;
173 if (socket_info.nconns>cst_lst.max_conn)
174 cst_lst.max_conn = socket_info.nconns;
175#endif
176}
177
178
179/** This sets up the socket and reads all the image information into memory. */
180void init_ericserver(void)
181{
182 struct sockaddr_in insock;
183 struct protoent *protox;
184 struct linger linger_opt; 67 struct linger linger_opt;
185
186#ifdef WIN32 /* ***win32 - we init a windows socket */
187 WSADATA w;
188
189 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */
190 WSAStartup (0x0101,&w); /* this setup all socket stuff */
191 /* ill include no error tests here, winsocket 1.1 should always work */
192 /* except some old win95 versions without tcp/ip stack */
193#else /* non windows */
194
195#ifdef HAVE_SYSCONF
196 socket_info.max_filedescriptor = sysconf(_SC_OPEN_MAX);
197#else
198# ifdef HAVE_GETDTABLESIZE
199 socket_info.max_filedescriptor = getdtablesize();
200# else
201 "Unable to find usable function to get max filedescriptors";
202# endif
203#endif
204#endif /* win32 */
205
206 socket_info.timeout.tv_sec = 0;
207 socket_info.timeout.tv_usec = 0;
208 socket_info.nconns=0;
209
210#ifdef CS_LOGSTATS
211 memset(&cst_tot, 0, sizeof(CS_Stats));
212 memset(&cst_lst, 0, sizeof(CS_Stats));
213 cst_tot.time_start=time(NULL);
214 cst_lst.time_start=time(NULL);
215#endif
216
217 LOG(llevDebug,"Initialize new client/server data\n");
218 socket_info.nconns = 1;
219 init_sockets = (NewSocket *) malloc(sizeof(NewSocket));
220 init_sockets[0].faces_sent = NULL; /* unused */
221 socket_info.allocated_sockets=1;
222
223 protox = getprotobyname("tcp");
224 if (protox==NULL) {
225 LOG(llevError,"init_ericserver: Error getting protox\n");
226 return;
227 }
228 init_sockets[0].fd = socket(PF_INET, SOCK_STREAM, protox->p_proto);
229 if (init_sockets[0].fd == -1) {
230 LOG(llevError, "Cannot create socket: %s\n", strerror(errno));
231 exit(-1);
232 }
233 insock.sin_family = AF_INET;
234 insock.sin_port = htons(settings.csport);
235 insock.sin_addr.s_addr = htonl(INADDR_ANY);
236 68
237 linger_opt.l_onoff = 0; 69 linger_opt.l_onoff = 0;
238 linger_opt.l_linger = 0; 70 linger_opt.l_linger = 0;
239 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, 71
240 sizeof(struct linger))) { 72 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
241 LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror(errno)); 73 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
74 }
75
76 {
77 int val = IPTOS_LOWDELAY;
78
79 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
80 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
81 }
82
83 {
84 int val = 1;
85
86 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
87 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
88 }
89
90#ifdef __linux__
91 {
92 int val;
93
94 // set some very aggressive keepalive parameters
95 val = 10;
96 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
97 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
98
99 val = 5;
100 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
101 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
102
103 val = 1;
104 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
105 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
106 }
107#endif
108
109 {
110 int bufsize = 65535; /*Supposed absolute upper limit */
111 int oldbufsize;
112 int buflen = sizeof (int);
113
114 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
115 LOG (llevError, "InitConnection: Error on fcntl.\n");
116
117 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
118 oldbufsize = 0;
119
120 if (oldbufsize < bufsize)
121 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
122 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
123
124 buflen = sizeof (oldbufsize);
125 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
126 }
127
128 state = ST_SETUP;
129 mapmode = Map0Cmd;
130 darkness = 1;
131 mapx = 11;
132 mapy = 11;
133 itemcmd = 1; /* Default is version item1 command */
134
135 faces_sent = salloc0<uint8> (nrofpixmaps);
136
137 /* Do this so we don't send a face command for the client for
138 * this face. Face 0 is sent to the client to say clear
139 * face information.
140 */
141 faces_sent[0] = NS_FACESENT_FACE;
142
143 // socket I/O is low priority
144 // we prefer to have the server run instead of handling client requests
145 socket_ev.prio (PE_PRIO_NORMAL + 1);
146 socket_ev.fd (fd);
147 socket_ev.poll (PE_R);
148
149 // command handling is even lower priority
150 // that way no client can monopolise the server
151 cmd_ev.prio (PE_PRIO_NORMAL + 2);
152
153 // initialisation done, kick it!
154 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
155 flush ();
156
157 clients.insert (this);
158}
159
160client::~client ()
161{
162 clients.erase (this);
163
164 sfree<uint8> (faces_sent, nrofpixmaps);
165 free (stats.range);
166 free (stats.title);
167 free (host);
168}
169
170void
171client::do_destroy ()
172{
173 attachable::do_destroy ();
174
175 if (pl)
176 pl->disconnect ();
177
178 if (fd >= 0)
179 {
180 send_packet ("goodbye");
181 flush ();
182
183 close (fd);
242 } 184 }
243/* Would be nice to have an autoconf check for this. It appears that 185
244 * these functions are both using the same calling syntax, just one 186 state = ST_DEAD;
245 * of them needs extra valus passed. 187
188 socket_ev.suspend ();
189 cmd_ev.suspend ();
190
191 refcnt_dec (); // socket no longer open
192}
193
194/** This sets up the socket and reads all the image information into memory. */
195void
196init_ericserver (void)
197{
198 cst_tot.time_start = time (NULL);
199 cst_lst.time_start = time (NULL);
200
201 LOG (llevDebug, "Initialize new client/server data\n");
202
203 read_client_images ();
204}
205
206
207/*******************************************************************************
246 */ 208 *
247#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \ 209 * Start of functions dealing with freeing of the data.
248 defined(__sun__) || defined(__linux__) || defined(SVR4) || \ 210 *
249 defined(__FreeBSD__) || defined(__OpenBSD__) || \ 211 ******************************************************************************/
250 defined(WIN32) /* ---win32 add this here */ || \ 212
251 defined(__GNU__) /* HURD */ 213/** Free's all the memory that ericserver allocates. */
214void
215free_all_newserver (void)
216{
217 LOG (llevDebug, "Freeing all new client/server information.\n");
218 free_socket_images ();
219}
220
221client *
222client::create (int fd, const char *peername)
223{
224 if (checkbanned (NULL, peername))
252 { 225 {
253#ifdef WIN32 226 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
254 char tmp = 1; 227 return 0;
255#else
256 int tmp =1;
257#endif
258
259 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) {
260 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror(errno));
261 }
262 } 228 }
263#else 229 else
264 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) { 230 {
265 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror(errno)); 231 client *ns = new client (dup (fd), peername);
232
233 ns->instantiate (); // effectively a nop right now
234
235 INVOKE_CLIENT (CONNECT, ns);
236
237 return ns;
266 } 238 }
267#endif
268
269 if (bind(init_sockets[0].fd,(struct sockaddr *)&insock,sizeof(insock)) == (-1)) {
270 LOG(llevError, "Cannot bind socket to port %d: %s\n", ntohs(insock.sin_port), strerror(errno));
271#ifdef WIN32 /* ***win32: close() -> closesocket() */
272 shutdown(init_sockets[0].fd,SD_BOTH);
273 closesocket(init_sockets[0].fd);
274#else
275 close(init_sockets[0].fd);
276#endif /* win32 */
277 exit(-1);
278 }
279 if (listen(init_sockets[0].fd,5) == (-1)) {
280 LOG(llevError, "Cannot listen on socket: %s\n", strerror(errno));
281#ifdef WIN32 /* ***win32: close() -> closesocket() */
282 shutdown(init_sockets[0].fd,SD_BOTH);
283 closesocket(init_sockets[0].fd);
284#else
285 close(init_sockets[0].fd);
286#endif /* win32 */
287 exit(-1);
288 }
289 init_sockets[0].status=Ns_Add;
290 read_client_images();
291} 239}
292 240
293
294/*******************************************************************************
295 *
296 * Start of functions dealing with freeing of the data.
297 *
298 ******************************************************************************/
299
300/** Free's all the memory that ericserver allocates. */
301void free_all_newserver(void)
302{
303 LOG(llevDebug,"Freeing all new client/server information.\n");
304 free_socket_images();
305 free(init_sockets);
306}
307
308/**
309 * Frees a socket.
310 * Basically, all we need to do here is free all data structures that
311 * might be associated with the socket. It is up to the caller to
312 * update the list
313 */
314
315void free_newsocket(NewSocket *ns)
316{
317#ifdef WIN32 /* ***win32: closesocket in windows style */
318 shutdown(ns->fd,SD_BOTH);
319 if (closesocket(ns->fd)) {
320#else
321 if (close(ns->fd)) {
322#endif /* win32 */
323
324#ifdef ESRV_DEBUG
325 LOG(llevDebug,"Error closing socket %d\n", ns->fd);
326#endif
327 }
328 if (ns->stats.range)
329 free(ns->stats.range);
330 if (ns->stats.title)
331 free(ns->stats.title);
332 if (ns->comment)
333 free(ns->comment);
334 free(ns->host);
335 free(ns->inbuf.buf);
336}
337
338/** Sends the 'goodbye' command to the player, and closes connection. */
339void final_free_player(player *pl)
340{
341 cs_write_string(&pl->socket, "goodbye", 8);
342 free_newsocket(&pl->socket);
343 free_player(pl);
344}
345

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