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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 1.33 by pippijn, Sat Jan 6 14:42:31 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 {
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 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; 65 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 66
237 linger_opt.l_onoff = 0; 67 linger_opt.l_onoff = 0;
238 linger_opt.l_linger = 0; 68 linger_opt.l_linger = 0;
239 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_LINGER,(char *) &linger_opt, 69
240 sizeof(struct linger))) { 70 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
241 LOG(llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror(errno)); 71 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
72 }
73
74 {
75 int val = IPTOS_LOWDELAY;
76
77 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
78 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
79 }
80
81 {
82 int val = 1;
83
84 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
85 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
86 }
87
88#ifdef __linux__
89 {
90 int val;
91
92 // set some very aggressive keepalive parameters
93 val = 10;
94 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
95 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
96
97 val = 5;
98 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
99 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
100
101 val = 1;
102 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
103 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
104 }
105#endif
106
107 {
108 int bufsize = 65535; /*Supposed absolute upper limit */
109 int oldbufsize;
110 int buflen = sizeof (int);
111
112 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
113 LOG (llevError, "InitConnection: Error on fcntl.\n");
114
115 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
116 oldbufsize = 0;
117
118 if (oldbufsize < bufsize)
119 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
120 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
121
122 buflen = sizeof (oldbufsize);
123 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
124 }
125
126 state = ST_SETUP;
127 mapmode = Map0Cmd;
128 darkness = 1;
129 mapx = 11;
130 mapy = 11;
131 itemcmd = 1; /* Default is version item1 command */
132
133 faces_sent = salloc0<uint8> (nrofpixmaps);
134
135 /* Do this so we don't send a face command for the client for
136 * this face. Face 0 is sent to the client to say clear
137 * face information.
138 */
139 faces_sent[0] = NS_FACESENT_FACE;
140
141 // socket I/O is low priority
142 // we prefer to have the server run instead of handling client requests
143 socket_ev.prio (PE_PRIO_NORMAL + 1);
144 socket_ev.fd (fd);
145 socket_ev.poll (PE_R);
146
147 // command handling is even lower priority
148 // that way no client can monopolise the server
149 cmd_ev.prio (PE_PRIO_NORMAL + 2);
150
151 // initialisation done, kick it!
152 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
153 flush ();
154
155 // clients are externally referenced by the socket
156 refcnt_inc ();
157 clients.push_back (this);
158
159#if 0//TODO
160 socket_info.nconns++;
161 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
162 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
163#endif
164}
165
166client::~client ()
167{
168 sockvec::iterator i = find (clients.begin (), clients.end (), this);
169 if (i != clients.end ())
170 clients.erase (i);
171
172 sfree<uint8> (faces_sent, nrofpixmaps);
173 free (stats.range);
174 free (stats.title);
175 free (host);
176}
177
178void
179client::do_destroy ()
180{
181 attachable::do_destroy ();
182
183 if (pl)
184 pl->disconnect ();
185
186 if (fd >= 0)
187 close (fd);
188
189 state = ST_DEAD;
190
191 socket_ev.suspend ();
192 cmd_ev.suspend ();
193
194 // socket now longer references us
195 refcnt_dec ();
196}
197
198/** This sets up the socket and reads all the image information into memory. */
199void
200init_ericserver (void)
201{
202 cst_tot.time_start = time (NULL);
203 cst_lst.time_start = time (NULL);
204
205 LOG (llevDebug, "Initialize new client/server data\n");
206
207 read_client_images ();
208}
209
210
211/*******************************************************************************
212 *
213 * Start of functions dealing with freeing of the data.
214 *
215 ******************************************************************************/
216
217/** Free's all the memory that ericserver allocates. */
218void
219free_all_newserver (void)
220{
221 LOG (llevDebug, "Freeing all new client/server information.\n");
222 free_socket_images ();
223}
224
225client *
226client::create (int fd, const char *peername)
227{
228 if (checkbanned (NULL, peername))
229 {
230 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
231 return 0;
242 } 232 }
243/* Would be nice to have an autoconf check for this. It appears that 233 else
244 * these functions are both using the same calling syntax, just one
245 * of them needs extra valus passed.
246 */
247#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
248 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
249 defined(__FreeBSD__) || defined(__OpenBSD__) || \
250 defined(WIN32) /* ---win32 add this here */ || \
251 defined(__GNU__) /* HURD */
252 { 234 {
253#ifdef WIN32 235 client *ns = new client (dup (fd), peername);
254 char tmp = 1;
255#else
256 int tmp =1;
257#endif
258 236
259 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR, &tmp, sizeof(tmp))) { 237 ns->instantiate (); // effectively a nop right now
260 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror(errno)); 238
261 } 239 INVOKE_CLIENT (CONNECT, ns);
240
241 return ns;
262 } 242 }
263#else
264 if(setsockopt(init_sockets[0].fd,SOL_SOCKET,SO_REUSEADDR,(char *)NULL,0)) {
265 LOG(llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror(errno));
266 }
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} 243}
292 244
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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