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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.9 by root, Wed Sep 20 21:53:50 2006 UTC vs.
Revision 1.33 by pippijn, Sat Jan 6 14:42:31 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 CrossFire, A Multiplayer game for X-windows
3 3
4 Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
4 Copyright (C) 2001 Mark Wedel 5 Copyright (C) 2001 Mark Wedel
5 Copyright (C) 1992 Frank Tore Johansen 6 Copyright (C) 1992 Frank Tore Johansen
6 7
7 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
8 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
… …
30 * Mainly deals with initialization and higher level socket 31 * Mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 32 * maintenance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c 33 * The reading of data is handled in ericserver.c
33 */ 34 */
34 35
35
36#include <global.h> 36#include <global.h>
37#ifndef __CEXTRACT__
38# include <sproto.h> 37#include <sproto.h>
39#endif
40#ifndef WIN32 /* ---win32 exclude include files */
41# include <sys/types.h> 38#include <sys/types.h>
42# include <sys/time.h> 39#include <sys/time.h>
43# include <sys/socket.h> 40#include <sys/socket.h>
44# include <netinet/in.h> 41#include <netinet/in.h>
42#include <netinet/tcp.h>
43#include <netinet/ip.h>
45# include <netdb.h> 44#include <netdb.h>
46#endif /* win32 */
47 45
48#ifdef HAVE_UNISTD_H
49# include <unistd.h> 46#include <unistd.h>
50#endif
51
52#ifdef HAVE_ARPA_INET_H
53# include <arpa/inet.h> 47#include <arpa/inet.h>
54#endif
55#include <newserver.h>
56 48
57Socket_Info socket_info; 49#include <algorithm>
58NewSocket *init_sockets; 50
51sockvec clients;
59 52
60/** 53/**
61 * Initializes a connection. Really, it just sets up the data structure, 54 * Initializes a connection. Really, it just sets up the data structure,
62 * 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
63 * client. 56 * client.
64 */ 57 */
65void 58client::client (int fd, const char *peername)
66InitConnection (NewSocket * ns, const char *from_ip) 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)
67{ 63{
68 SockList sl; 64 {
69 char buf[256]; 65 struct linger linger_opt;
66
67 linger_opt.l_onoff = 0;
68 linger_opt.l_linger = 0;
69
70 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
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 {
70 int bufsize = 65535; /*Supposed absolute upper limit */ 108 int bufsize = 65535; /*Supposed absolute upper limit */
71 int oldbufsize; 109 int oldbufsize;
72 int buflen = sizeof (int); 110 int buflen = sizeof (int);
73 111
74#ifdef WIN32 /* ***WIN32 SOCKET: init win32 non blocking socket */
75 int temp = 1;
76
77 if (ioctlsocket (ns->fd, FIONBIO, &temp) == -1)
78 LOG (llevError, "InitConnection: Error on ioctlsocket.\n");
79#else
80 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 112 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
81 {
82 LOG (llevError, "InitConnection: Error on fcntl.\n"); 113 LOG (llevError, "InitConnection: Error on fcntl.\n");
83 }
84#endif /* end win32 */
85 114
86 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 115 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
87 oldbufsize = 0; 116 oldbufsize = 0;
117
88 if (oldbufsize < bufsize) 118 if (oldbufsize < bufsize)
89 {
90#ifdef ESRV_DEBUG
91 LOG (llevDebug, "Default buffer size was %d bytes, will reset it to %d\n", oldbufsize, bufsize);
92#endif
93 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 119 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
94 {
95 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); 120 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
96 } 121
97 }
98 buflen = sizeof (oldbufsize); 122 buflen = sizeof (oldbufsize);
99 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 123 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
100#ifdef ESRV_DEBUG 124 }
101 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize);
102#endif
103 125
104 ns->faceset = 0; 126 state = ST_SETUP;
105 ns->facecache = 0;
106 ns->image2 = 0;
107 ns->sound = 0;
108 ns->exp64 = 0;
109 ns->monitor_spells = 0;
110 ns->mapmode = Map0Cmd; 127 mapmode = Map0Cmd;
111 ns->darkness = 1; 128 darkness = 1;
112 ns->status = Ns_Add;
113 ns->mapx = 11; 129 mapx = 11;
114 ns->mapy = 11; 130 mapy = 11;
115 ns->newmapcmd = 0;
116 ns->itemcmd = 1; /* Default is version item1 command */ 131 itemcmd = 1; /* Default is version item1 command */
117 ns->ext_mapinfos = 0; /*extendedmapinfo datas */
118 ns->EMI_smooth = 0;
119 ns->look_position = 0;
120 ns->update_look = 0;
121 ns->has_readable_type = 0;
122 ns->supported_readables = 0;
123 ns->monitor_spells = 0;
124 ns->mapinfocmd = 0;
125 ns->extcmd = 0;
126 ns->extmap = 0;
127 132
128 /* we should really do some checking here - if total clients overflows 133 faces_sent = salloc0<uint8> (nrofpixmaps);
129 * we need to do something more intelligent, because client id's will start 134
130 * duplicating (not likely in normal cases, but malicous attacks that
131 * just open and close connections could get this total up.
132 */
133 ns->inbuf.len = 0;
134 ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF);
135 /* Basic initialization. Needed because we do a check in
136 * HandleClient for oldsocketmode without checking the
137 * length of data.
138 */
139 memset (ns->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF);
140 memset (&ns->lastmap, 0, sizeof (struct Map));
141 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
142 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
143 memset (&ns->stats, 0, sizeof (struct statsinfo));
144 /* Do this so we don't send a face command for the client for 135 /* Do this so we don't send a face command for the client for
145 * this face. Face 0 is sent to the client to say clear 136 * this face. Face 0 is sent to the client to say clear
146 * face information. 137 * face information.
147 */ 138 */
148 ns->faces_sent[0] = NS_FACESENT_FACE; 139 faces_sent[0] = NS_FACESENT_FACE;
149 140
150 ns->outputbuffer.start = 0; 141 // socket I/O is low priority
151 ns->outputbuffer.len = 0; 142 // we prefer to have the server run instead of handling client requests
152 ns->can_write = 1; 143 socket_ev.prio (PE_PRIO_NORMAL + 1);
153 ns->password_fails = 0; 144 socket_ev.fd (fd);
145 socket_ev.poll (PE_R);
154 146
155 ns->current_map = 0; 147 // command handling is even lower priority
156 ns->current_x = 0; 148 // that way no client can monopolise the server
157 ns->current_y = 0; 149 cmd_ev.prio (PE_PRIO_NORMAL + 2);
158 ns->client[0] = 0;
159 ns->buggy_mapscroll = 0;
160 150
161 ns->sent_scroll = 0; 151 // initialisation done, kick it!
162 ns->host = strdup_local (from_ip);
163 sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 152 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
164 sl.buf = (unsigned char *) buf; 153 flush ();
165 sl.len = strlen ((char *) buf); 154
166 Send_With_Handling (ns, &sl); 155 // clients are externally referenced by the socket
167#ifdef CS_LOGSTATS 156 refcnt_inc ();
168 if (socket_info.nconns > cst_tot.max_conn) 157 clients.push_back (this);
169 cst_tot.max_conn = socket_info.nconns; 158
170 if (socket_info.nconns > cst_lst.max_conn) 159#if 0//TODO
171 cst_lst.max_conn = socket_info.nconns; 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;
172#endif 163#endif
173} 164}
174 165
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}
175 197
176/** This sets up the socket and reads all the image information into memory. */ 198/** This sets up the socket and reads all the image information into memory. */
177void 199void
178init_ericserver (void) 200init_ericserver (void)
179{ 201{
180 struct sockaddr_in insock;
181 struct protoent *protox;
182 struct linger linger_opt;
183
184#ifdef WIN32 /* ***win32 - we init a windows socket */
185 WSADATA w;
186
187 socket_info.max_filedescriptor = 1; /* used in select, ignored in winsockets */
188 WSAStartup (0x0101, &w); /* this setup all socket stuff */
189 /* ill include no error tests here, winsocket 1.1 should always work */
190 /* except some old win95 versions without tcp/ip stack */
191#else /* non windows */
192
193# ifdef HAVE_SYSCONF
194 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
195# else
196# ifdef HAVE_GETDTABLESIZE
197 socket_info.max_filedescriptor = getdtablesize ();
198# else
199 "Unable to find usable function to get max filedescriptors";
200# endif
201# endif
202#endif /* win32 */
203
204 socket_info.timeout.tv_sec = 0;
205 socket_info.timeout.tv_usec = 0;
206 socket_info.nconns = 0;
207
208#ifdef CS_LOGSTATS
209 memset (&cst_tot, 0, sizeof (CS_Stats));
210 memset (&cst_lst, 0, sizeof (CS_Stats));
211 cst_tot.time_start = time (NULL); 202 cst_tot.time_start = time (NULL);
212 cst_lst.time_start = time (NULL); 203 cst_lst.time_start = time (NULL);
213#endif
214 204
215 LOG (llevDebug, "Initialize new client/server data\n"); 205 LOG (llevDebug, "Initialize new client/server data\n");
216 socket_info.nconns = 1;
217 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
218 init_sockets[0].faces_sent = NULL; /* unused */
219 socket_info.allocated_sockets = 1;
220 206
221 protox = getprotobyname ("tcp");
222 if (protox == NULL)
223 {
224 LOG (llevError, "init_ericserver: Error getting protox\n");
225 return;
226 }
227 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
228 if (init_sockets[0].fd == -1)
229 {
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
237 linger_opt.l_onoff = 0;
238 linger_opt.l_linger = 0;
239 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
240 {
241 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
242 }
243
244/* Would be nice to have an autoconf check for this. It appears that
245 * these functions are both using the same calling syntax, just one
246 * of them needs extra valus passed.
247 */
248#if defined(__osf__) || defined(hpux) || defined(sgi) || defined(NeXT) || \
249 defined(__sun__) || defined(__linux__) || defined(SVR4) || \
250 defined(__FreeBSD__) || defined(__OpenBSD__) || \
251 defined(WIN32) /* ---win32 add this here */ || \
252 defined(__GNU__) /* HURD */
253 {
254# ifdef WIN32
255 char tmp = 1;
256# else
257 int tmp = 1;
258# endif
259
260 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
261 {
262 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
263 }
264 }
265#else
266 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *) NULL, 0))
267 {
268 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
269 }
270#endif
271
272 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
273 {
274 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
275#ifdef WIN32 /* ***win32: close() -> closesocket() */
276 shutdown (init_sockets[0].fd, SD_BOTH);
277 closesocket (init_sockets[0].fd);
278#else
279 close (init_sockets[0].fd);
280#endif /* win32 */
281 exit (-1);
282 }
283 if (listen (init_sockets[0].fd, 5) == (-1))
284 {
285 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
286#ifdef WIN32 /* ***win32: close() -> closesocket() */
287 shutdown (init_sockets[0].fd, SD_BOTH);
288 closesocket (init_sockets[0].fd);
289#else
290 close (init_sockets[0].fd);
291#endif /* win32 */
292 exit (-1);
293 }
294 init_sockets[0].status = Ns_Add;
295 read_client_images (); 207 read_client_images ();
296} 208}
297 209
298 210
299/******************************************************************************* 211/*******************************************************************************
… …
306void 218void
307free_all_newserver (void) 219free_all_newserver (void)
308{ 220{
309 LOG (llevDebug, "Freeing all new client/server information.\n"); 221 LOG (llevDebug, "Freeing all new client/server information.\n");
310 free_socket_images (); 222 free_socket_images ();
311 free (init_sockets);
312} 223}
313 224
314/** 225client *
315 * Frees a socket. 226client::create (int fd, const char *peername)
316 * Basically, all we need to do here is free all data structures that
317 * might be associated with the socket. It is up to the caller to
318 * update the list
319 */
320
321void
322free_newsocket (NewSocket * ns)
323{ 227{
324#ifdef WIN32 /* ***win32: closesocket in windows style */ 228 if (checkbanned (NULL, peername))
325 shutdown (ns->fd, SD_BOTH);
326 if (closesocket (ns->fd))
327 { 229 {
328#else 230 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
329 if (close (ns->fd)) 231 return 0;
232 }
233 else
330 { 234 {
331#endif /* win32 */ 235 client *ns = new client (dup (fd), peername);
332 236
333#ifdef ESRV_DEBUG 237 ns->instantiate (); // effectively a nop right now
334 LOG (llevDebug, "Error closing socket %d\n", ns->fd); 238
335#endif 239 INVOKE_CLIENT (CONNECT, ns);
240
241 return ns;
336 } 242 }
337
338 if (ns->stats.range)
339 free (ns->stats.range);
340
341 if (ns->stats.title)
342 free (ns->stats.title);
343
344 free (ns->host);
345 free (ns->inbuf.buf);
346} 243}
347 244
348/** Sends the 'goodbye' command to the player, and closes connection. */
349void
350final_free_player (player *pl)
351{
352 cs_write_string (&pl->socket, "goodbye", 8);
353 free_newsocket (&pl->socket);
354 free_player (pl);
355}

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