[ViewVC] Diff of: cvs/deliantra/server/socket/lowlevel.C

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.18 by root, Thu Dec 14 05:09:32 2006 UTC vs.
Revision 1.49 by root, Sun Jul 1 05:00:20 2007 UTC

…		…
1	/*	1	/*
2	CrossFire, A Multiplayer game for X-windows	2	* This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3		3	*
		4	* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
4	Copyright (C) 1992 Frank Tore Johansen	5	* Copyright (©) 1992,2007 Frank Tore Johansen
5		6	*
6	This program is free software; you can redistribute it and/or modify	7	* Crossfire TRT is free software: you can redistribute it and/or modify
7	it under the terms of the GNU General Public License as published by	8	* it under the terms of the GNU General Public License as published by
8	the Free Software Foundation; either version 2 of the License, or	9	* the Free Software Foundation, either version 3 of the License, or
9	(at your option) any later version.	10	* (at your option) any later version.
10		11	*
11	This program is distributed in the hope that it will be useful,	12	* This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.	15	* GNU General Public License for more details.
15		16	*
16	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
17	along with this program; if not, write to the Free Software	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
20	The author can be reached via e-mail to mark@pyramid.com
21	*/
22
23	/**
24	* \file
25	* Low-level socket-related functions.
26	*	19	*
27	* \date 2003-12-02	20	* The authors can be reached via e-mail to <crossfire@schmorp.de>
28	*
29	* Contains some base functions that both the client and server
30	* can use. As such, depending what we are being compiled for will
31	* determine what we can include. the client is designed have
32	* CFCLIENT defined as part of its compile flags.
33	*/	21	*/
34		22
35	using namespace std;	23	using namespace std;
36		24
37	#include <global.h>	25	#include <global.h>
38	#include <newclient.h>
39	#include <sproto.h>	26	#include <sproto.h>
40	#include <cstdarg>	27	#include <cstdarg>
41		28
42	#ifdef __linux__	29	#if HAVE_TCP_INFO
43	# include <sys/types.h>	30	# include <sys/types.h>
44	# include <sys/socket.h>	31	# include <sys/socket.h>
45	# include <netinet/in.h>	32	# include <netinet/in.h>
46	# define TCP_HZ 1000 // sorry...
47	# include <netinet/tcp.h>	33	# include <netinet/tcp.h>
48	#endif	34	#endif
49		35
50	// use a really low timeout, as it doesn't cost any bandwidth, and you can	36	// disconnect a socket after this many seconds without an ack
51	// easily die in 20 seconds...
52	#define SOCKET_TIMEOUT1 10	37	#define SOCKET_TIMEOUT 8.
53	#define SOCKET_TIMEOUT2 20
54		38
		39	// force a packet when idle for more than this many seconds,
		40	// forcing an ack regularly.
		41	#define IDLE_PING 2.
		42
55	void	43	void
56	Socket_Flush (client_socket * ns)	44	client::flush ()
57	{	45	{
58	#ifdef __linux__	46	if (destroyed ())
		47	return;
		48
		49	#if HAVE_TCP_INFO
		50	// check about once per second, spread evenly over all clients
		51	// do this only when player is active
		52	if (!((pticks + fd) & 7) && pl && pl->active)
		53	{
59	// check time of last ack, and, if too old, kill connection	54	// check time of last ack, and, if too old, kill connection
60	struct tcp_info tcpi;	55	struct tcp_info tcpi;
61	socklen_t len = sizeof (tcpi);	56	socklen_t len = sizeof (tcpi);
62		57
63	if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))	58	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
64	{	59	{
65	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;	60	if (tcpi.tcpi_snd_mss)
		61	mss = tcpi.tcpi_snd_mss;
66		62
67	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s	63	rtt = tcpi.tcpi_rtt;
68	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s	64	rttvar = tcpi.tcpi_rttvar;
		65
		66	if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
69	{	67	{
		68	send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
		69	write_outputbuffer ();
		70
70	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd,	71	LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
71	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);	72	(unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
72	ns->status = Ns_Dead;	73	destroy ();
73	}	74	}
		75	}
74	}	76	}
75
76	int val;
77
78	val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
79	val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
80	#endif	77	#endif
81	}
82		78
83	/***********************************************************************	79	/**
84	*	80	* Writes data to socket.
85	* packet functions/utilities	81	*
86	*	82	* When the socket is clear to write, and we have backlogged data, this
87	**********************************************************************/	83	* is called to write it out.
		84	*/
88		85
89	packet &packet::operator <<(const data &v)	86	// write a nop to the socket at least every IDLE_NOP seconds.
90	{	87	if (!outputbuffer.len)
91	if (room () < v.len)
92	reset ();
93	else
94	{	88	{
95	if (v.len)	89	if (last_send + IDLE_PING <= NOW && pl && pl->active)
96	{
97	memcpy (cur, v.ptr, v.len);
98	cur += v.len;
99	}	90	{
		91	// this is a bit ugly, but map1/map1a seem to be the only
		92	// nop'able commands and they are quite small.
		93	packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
		94	send_packet (sl);
		95	}
		96	else
		97	return;
		98	}
		99
		100	if (socket_ev.poll () & PE_W)
		101	return;
		102
		103	last_send = NOW;
		104	write_outputbuffer ();
		105	}
		106
		107	void
		108	client::write_outputbuffer ()
		109	{
		110	while (outputbuffer.len)
100	}	111	{
		112	int res = write (fd, outputbuffer.data + outputbuffer.start,
		113	min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
101		114
102	return *this;	115	if (res > 0)
103	}	116	{
		117	outputbuffer.start += res;
		118	/* wrap back to start of buffer */
		119	if (outputbuffer.start == SOCKETBUFSIZE)
		120	outputbuffer.start = 0;
104		121
105	packet &packet::operator <<(const data8 &v)	122	outputbuffer.len -= res;
106	{	123	}
107	unsigned int len = min (v.len, 0x00FF);	124	else if (res == 0)
108	return *this << uint8 (len) << data (v.ptr, len);	125	{
109	}	126	LOG (llevError, "socket write failed, connection closed.\n");
		127	destroy ();
		128	return;
		129	}
		130	else if (errno == EINTR)
		131	{
		132	// just retry
		133	}
		134	else if (errno == EAGAIN)
		135	{
		136	// delay till ready
		137	socket_ev.poll (socket_ev.poll () \| PE_W);
		138	socket_ev.start ();
		139	return;
		140	}
		141	else
		142	{
		143	LOG (llevError, "socket write failed: %s\n", strerror (errno));
		144	destroy ();
		145	return;
		146	}
		147	}
110		148
111	packet &packet::operator <<(const data16 &v)	149	socket_ev.poll (socket_ev.poll () & ~PE_W);
112	{
113	unsigned int len = min (v.len, 0xFFFF);
114	return *this << uint16 (len) << data (v.ptr, len);
115	}
116
117	packet &packet::operator <<(const char *v)
118	{
119	return *this << data (v, strlen (v ? v : 0));
120	}
121
122	void
123	packet::printf (const char *format, ...)
124	{
125	int size = room ();
126
127	va_list ap;
128	va_start (ap, format);
129	int len = vsnprintf ((char *)cur, size, format, ap);
130	va_end (ap);
131
132	if (len >= size)
133	return reset ();
134
135	cur += len;
136	}	150	}
137		151
138	/******************************************************************************	152	/******************************************************************************
139	*	153	*
140	* Start of read routines.	154	* Start of read routines.
141	*	155	*
142	******************************************************************************/	156	******************************************************************************/
143		157
144	int	158	int
145	client_socket::read_packet ()	159	client::next_packet ()
146	{	160	{
147	for (;;)
148	{
149	if (inbuf_len >= 2)	161	if (inbuf_len >= 2)
150	{	162	{
151	unsigned int pkt_len = (inbuf [0] << 8) \| inbuf [1];	163	int pkt_len = (inbuf [0] << 8) \| inbuf [1];
152		164
153	if (inbuf_len >= 2 + pkt_len)	165	if (inbuf_len >= 2 + pkt_len)
154	return pkt_len + 2;	166	return 2 + pkt_len;
		167
		168	if (inbuf_len == sizeof (inbuf))
155	}	169	{
		170	send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED);
		171	destroy ();
		172	return -1;
		173	}
		174	}
		175
		176	return 0;
		177	}
		178
		179	void
		180	client::skip_packet (int len)
		181	{
		182	inbuf_len -= len;
		183	memmove (inbuf, inbuf + len, inbuf_len);
		184	}
		185
		186	/*****************************************************************************
		187	* Start of command dispatch area.
		188	* The commands here are protocol commands.
		189	****************************************************************************/
		190
		191	// SocketCommand, PlayingCommand, should not exist with those ugly casts
		192	#define SC(cb) (void )static_cast<void ()(char , int, client )>(cb),
		193	#define PC(cb) (void )static_cast<void ()(char , int, player )>(cb), PF_PLAYER \|
		194
		195	/**
		196	* Dispatch table for the server.
		197	*/
		198	static struct packet_type packets[] = {
		199	{"ncom", PC(NewPlayerCmd) PF_PLAYING \| PF_COMMAND6 },
		200	{"command", PC(PlayerCmd) PF_PLAYING \| PF_COMMAND0 },
		201
		202	{"examine", PC(ExamineCmd) PF_PLAYING },
		203	{"ex", PC(ExCmd) PF_PLAYING },
		204	{"apply", PC(ApplyCmd) PF_PLAYING },
		205	{"lookat", PC(LookAt) PF_PLAYING },
		206	{"lock", PC(LockItem) PF_PLAYING },
		207	{"mark", PC(MarkItem) PF_PLAYING },
		208	{"move", PC(MoveCmd) PF_PLAYING },
		209	{"ext", PC(ExtCmd) 0 }, // CF+
		210	{"mapredraw", PC(MapRedrawCmd) 0 },
		211	{"mapinfo", PC(MapInfoCmd) 0 }, // CF+
		212
		213	{"reply", SC(ReplyCmd) 0 },
		214	{"exti", SC(ExtiCmd) 0 }, // CF+
		215	{"addme", SC(AddMeCmd) 0 },
		216	{"askface", SC(AskFaceCmd) 0 },
		217	{"requestinfo", SC(RequestInfo) 0 },
		218	{"setfacemode", SC(SetFaceMode) 0 },
		219	{"setsound", SC(SetSound) 0 },
		220	{"setup", SC(SetUp) 0 },
		221	{"version", SC(VersionCmd) 0 },
		222	{"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /Added: tchize /
		223	{"toggleextendedtext", SC(ToggleExtendedText) 0 }, /Added: tchize /
		224	{"asksmooth", SC(AskSmooth) 0 }, /Added: tchize (smoothing technologies) /
		225	};
		226
		227	bool
		228	client::may_execute (const packet_type *pkt) const
		229	{
		230	return (!(pkt->flags & PF_PLAYER) \|\| pl)
		231	&& (!(pkt->flags & PF_PLAYING) \|\| state == ST_PLAYING);
		232	}
		233
		234	// HACK: some commands currently should be executed
		235	// even when the player is frozen. this hack detects
		236	// those commands. it should be folded into may_execute,
		237	// but kept seperate to emphasise the hack aspect, i.e.
		238	// do it better, then remove.
		239	static bool
		240	always_immediate (const client ns, const packet_type pkt, const char *data, int len)
		241	{
		242	if (!(pkt->flags & (PF_COMMAND0 \| PF_COMMAND6)))
		243	return false;
		244
		245	if (!ns->pl \|\| !ns->pl->ob \|\| !ns->pl->ob->map)
		246	return false;
		247
		248	if (pkt->flags & PF_COMMAND6)
		249	{
		250	data += 6;
		251	len -= 6;
		252	}
		253
		254	if (len > 4 && !strncmp (data, "say " , 4))
		255	return true;
		256	if (len > 5 && !strncmp (data, "chat ", 5))
		257	return true;
		258
		259	return false;
		260	}
		261
		262	void
		263	client::execute (const packet_type pkt, char data, int datalen)
		264	{
		265	if (may_execute (pkt) \|\| always_immediate (this, pkt, data, datalen))
		266	{
		267	//TODO: only one format
		268	if (pkt->flags & PF_PLAYER)
		269	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
		270	else
		271	((void ()(char , int, client ))pkt->cb)((char )data, datalen, this);
		272	}
		273	else
		274	send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name);
		275	}
		276
		277	bool
		278	client::handle_packet ()
		279	{
		280	int pkt_len = next_packet ();
		281
		282	if (!pkt_len)
		283	return false;
		284	else if (pkt_len < 0)
		285	{
		286	LOG (llevError, "read error on player %s\n",
		287	pl && pl->ob ? &pl->ob->name : "[anonymous]");
		288	destroy ();
		289	return false;
		290	}
		291
		292	inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
		293
		294	/* First, break out beginning word. There are at least
		295	* a few commands that do not have any paremeters. If
		296	* we get such a command, don't worry about trying
		297	* to break it up.
		298	*/
		299	int datalen;
		300	char data = strchr ((char )inbuf + 2, ' ');
		301
		302	if (data)
		303	{
		304	*data++ = 0;
		305	datalen = pkt_len - (data - (char *)inbuf);
		306	}
		307	else
		308	{
		309	data = (char *)inbuf + 2; // better read garbage than segfault
		310	datalen = 0;
		311	}
		312
		313	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
		314	if (!strcmp ((char *)inbuf + 2, pkt->name))
		315	{
		316	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
		317	queue_command (pkt, data, datalen);
		318	else
		319	execute (pkt, data, datalen);
		320
		321	goto next_packet;
		322	}
		323
		324	// If we get here, we didn't find a valid command.
		325	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
		326	next_packet:
		327	skip_packet (pkt_len);
		328
		329	// input buffer has space again
		330	socket_ev.poll (socket_ev.poll () \| PE_R);
		331
		332	return true;
		333	}
		334
		335	// callback called when socket is either readable or writable
		336	void
		337	client::socket_cb (iow &w, int got)
		338	{
		339	//TODO remove when we have better socket cleanup logic
		340	if (destroyed ())
		341	{
		342	socket_ev.poll (0);
		343	return;
		344	}
		345
		346	if (got & PE_W)
		347	{
		348	write_outputbuffer ();
		349
		350	if (!outputbuffer.len)
		351	socket_ev.poll (socket_ev.poll () & ~PE_W);
		352	}
		353
		354	if (got & PE_R)
		355	{
		356	//TODO: rate-limit tcp connection in better ways, important
156		357
157	int amount = sizeof (inbuf) - inbuf_len;	358	int amount = sizeof (inbuf) - inbuf_len;
158		359
159	if (amount <= 0)	360	if (!amount)
160	{	361	{
161	LOG (llevError, "packet too large");//TODO	362	// input buffer full
		363	socket_ev.poll (socket_ev.poll () & ~PE_R);
162	return -1;	364	return;
163	}	365	}
164		366
165	amount = read (fd, inbuf + inbuf_len, amount);	367	amount = read (fd, inbuf + inbuf_len, amount);
166		368
167	if (!amount)	369	if (!amount)
168	{	370	{
169	status = Ns_Dead;	371	destroy ();
170	return -1;	372	return;
171	}	373	}
172	else if (amount < 0)	374	else if (amount < 0)
173	{	375	{
174	if (errno != EAGAIN && errno != EINTR)	376	if (errno != EAGAIN && errno != EINTR)
175	{	377	{
176	LOG (llevError, "read error: %s", strerror (errno));	378	LOG (llevError, "read error: %s\n", strerror (errno));
		379	destroy ();
177	return -1;	380	return;
178	}	381	}
179		382
180	return 0;	383	// should not be here, normally
		384	}
		385	else
181	}	386	{
182
183	inbuf_len += amount;	387	inbuf_len += amount;
184		388
185	cst_tot.ibytes += amount;	389	cmd_ev.start ();
186	cst_lst.ibytes += amount;	390	}
187	}	391	}
188	}	392	}
189		393
		394	// called whenever we have additional commands to process
190	void	395	void
191	client_socket::skip_packet (int len)	396	client::cmd_cb (iw &w)
192	{	397	{
193	inbuf_len -= len;	398	if (handle_packet ())
194	memmove (inbuf, inbuf + len, inbuf_len);	399	w.start ();
		400	else
		401	flush ();
195	}	402	}
196		403
197	/*******************************************************************************	404	/*******************************************************************************
198	*	405	*
199	* Start of write related routines.	406	* Start of write related routines.
204	* Adds data to a socket buffer for whatever reason.	411	* Adds data to a socket buffer for whatever reason.
205	*	412	*
206	* ns is the socket we are adding the data to, buf is the start of the	413	* ns is the socket we are adding the data to, buf is the start of the
207	* data, and len is the number of bytes to add.	414	* data, and len is the number of bytes to add.
208	*/	415	*/
209		416	void
210	static void	417	client::send (void *buf_, int len)
211	add_to_buffer (client_socket ns, char buf, int len)
212	{	418	{
		419	char buf = (char )buf_;
		420
		421	if (destroyed () \|\| !buf)
		422	return;
		423
		424	if (len + outputbuffer.len > SOCKETBUFSIZE)
		425	{
		426	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
		427	// shutdown the socket, this is safer than destroying it immediately
		428	// as lots of code in the callchain might still access the map etc.
		429	shutdown (fd, SHUT_RDWR);
		430	return;
		431	}
		432
213	int avail, end;	433	int avail, end;
214
215	if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE)
216	{
217	LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd);
218	ns->status = Ns_Dead;
219	return;
220	}
221		434
222	/* data + end is where we start putting the new data. The last byte	435	/* data + end is where we start putting the new data. The last byte
223	* currently in use is actually data + end -1	436	* currently in use is actually data + end -1
224	*/	437	*/
225
226	end = ns->outputbuffer.start + ns->outputbuffer.len;	438	end = outputbuffer.start + outputbuffer.len;
227	/* The buffer is already in a wrapped state, so adjust end */	439	/* The buffer is already in a wrapped state, so adjust end */
228	if (end >= SOCKETBUFSIZE)	440	if (end >= SOCKETBUFSIZE)
229	end -= SOCKETBUFSIZE;	441	end -= SOCKETBUFSIZE;
230		442
231	avail = SOCKETBUFSIZE - end;	443	avail = SOCKETBUFSIZE - end;
232		444
233	/* We can all fit it behind the current data without wrapping */	445	/* We can all fit it behind the current data without wrapping */
234	if (avail >= len)	446	if (avail >= len)
235	memcpy (ns->outputbuffer.data + end, buf, len);	447	memcpy (outputbuffer.data + end, buf, len);
236	else	448	else
237	{	449	{
238	memcpy (ns->outputbuffer.data + end, buf, avail);	450	memcpy (outputbuffer.data + end, buf, avail);
239	memcpy (ns->outputbuffer.data, buf + avail, len - avail);	451	memcpy (outputbuffer.data, buf + avail, len - avail);
240	}	452	}
241		453
242	ns->outputbuffer.len += len;	454	outputbuffer.len += len;
243	#if 0
244	LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start);
245	#endif
246	}
247
248	/**
249	* Writes data to socket.
250	*
251	* When the socket is clear to write, and we have backlogged data, this
252	* is called to write it out.
253	*/
254	void
255	write_socket_buffer (client_socket * ns)
256	{
257	int amt, max;
258
259	if (ns->outputbuffer.len == 0)
260	{
261	LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd);
262	return;
263	}
264
265	do
266	{
267	max = SOCKETBUFSIZE - ns->outputbuffer.start;
268	if (ns->outputbuffer.len < max)
269	max = ns->outputbuffer.len;
270
271	do
272	{
273	amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max);
274	}
275	while ((amt < 0) && (errno == EINTR));
276
277	if (amt < 0)
278	{ /* We got an error */
279
280	if (errno != EWOULDBLOCK)
281	{
282	LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno));
283	ns->status = Ns_Dead;
284	return;
285	}
286	else
287	{ /* EWOULDBLOCK */
288	/* can't write it, so store it away. */
289	ns->can_write = 0;
290	return;
291	}
292	}
293	ns->outputbuffer.start += amt;
294	/* wrap back to start of buffer */
295	if (ns->outputbuffer.start == SOCKETBUFSIZE)
296	ns->outputbuffer.start = 0;
297	ns->outputbuffer.len -= amt;
298	#ifdef CS_LOGSTATS
299	cst_tot.obytes += amt;
300	cst_lst.obytes += amt;
301	#endif
302	}
303	while (ns->outputbuffer.len > 0);
304	}
305
306	/**
307	* This writes data to the socket. - It is very low level -
308	* all we try and do is write out the data to the socket
309	* provided (ns). buf is the data to write, len is the number
310	* of bytes to write. IT doesn't return anything - rather, it
311	* updates the ns structure if we get an error.
312	*/
313	void
314	client_socket::send (void *buf_, int len)
315	{
316	char buf = (char )buf_;
317	char *pos = buf;
318	int amt = 0;
319
320	if (status == Ns_Dead \|\| !buf)
321	{
322	LOG (llevDebug, "Write_To_Socket called with dead socket\n");
323	return;
324	}
325
326	#ifndef __GNU__ /* This caused problems on Hurd */
327	if (!can_write)
328	{
329	add_to_buffer (this, buf, len);
330	return;
331	}
332	#endif
333
334	/* If we manage to write more than we wanted, take it as a bonus */
335	while (len > 0)
336	{
337	do
338	{
339	amt = write (fd, pos, len);
340	}
341	while ((amt < 0) && (errno == EINTR));
342
343	if (amt < 0)
344	{ /* We got an error */
345	if (errno != EWOULDBLOCK)
346	{
347	LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */
348	errno, strerror (errno));
349	status = Ns_Dead;
350	return;
351	}
352	else
353	{ /* EWOULDBLOCK */
354	/* can't write it, so store it away. */
355	add_to_buffer (this, pos, len);
356	can_write = 0;
357	return;
358	}
359	}
360	/* amt gets set to 0 above in blocking code, so we do this as
361	* an else if to make sure we don't reprocess it.
362	*/
363	else if (amt == 0)
364	LOG (llevError, "Write_To_Socket: No data written out.\n");
365
366	len -= amt;
367	pos += amt;
368	#ifdef CS_LOGSTATS
369	cst_tot.obytes += amt;
370	cst_lst.obytes += amt;
371	#endif
372	}
373	}	455	}
374		456
375	/**	457	/**
376	* Takes a string of data, and writes it out to the socket. A very handy	458	* Takes a string of data, and writes it out to the socket. A very handy
377	* shortcut function.	459	* shortcut function.
378	*/	460	*/
379
380	void	461	void
381	client_socket::send_packet (packet &sl)	462	client::send_packet (packet &sl)
382	{	463	{
383	Send_With_Handling (this, &sl);	464	if (destroyed ())
384	}
385
386	void
387	client_socket::send_packet (const char *buf, int len)
388	{
389	packet sl;
390
391	sl << data (buf, len);
392	send_packet (sl);
393	}
394
395	void
396	client_socket::send_packet (const char *buf)
397	{
398	send_packet (buf, strlen (buf));
399	}
400
401	/**
402	* Calls Write_To_Socket to send data to the client.
403	*
404	* The only difference in this function is that we take a packet
405	*, and we prepend the length information.
406	*/
407	void
408	Send_With_Handling (client_socket ns, packet msg)
409	{
410	unsigned char sbuf[4];
411
412	if (ns->status == Ns_Dead \|\| !msg)
413	return;	465	return;
414		466
415	if (msg->length () >= MAXSOCKBUF)	467	if (sl.length () >= MAXSOCKBUF)
416	{	468	{
417	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->length ());	469	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
418	/* Almost certainly we've overflowed a buffer, so quite now to make	470	/* Almost certainly we've overflowed a buffer, so quit now to make
419	* it easier to debug.	471	* it easier to debug.
420	*/	472	*/
421	abort ();	473	abort ();
422	}	474	}
423		475
424	sbuf[0] = ((uint32) (msg->length ()) >> 8);	476	if (!sl.length ())
425	sbuf[1] = ((uint32) (msg->length ()) );	477	return;
426		478
427	//TODO: single write, or writev	479	assert (sl.hdrlen == 2);
428	ns->send (sbuf, 2);
429	ns->send (msg->buf, msg->length ());
430	}
431		480
		481	sl.buf_ [0] = sl.length () >> 8;
		482	sl.buf_ [1] = sl.length () ;
		483
		484	send (sl.buf_, sl.length () + sl.hdrlen);
		485	}
		486
		487	void
		488	client::send_packet (const char *buf, int len)
		489	{
		490	packet sl;
		491
		492	sl << data (buf, len);
		493	send_packet (sl);
		494	}
		495
		496	void
		497	client::send_packet (const char *buf)
		498	{
		499	send_packet (buf, strlen (buf));
		500	}
		501
		502	void
		503	client::send_packet_printf (const char *format, ...)
		504	{
		505	packet sl;
		506
		507	va_list ap;
		508	va_start (ap, format);
		509	sl.vprintf (format, ap);
		510	va_end (ap);
		511
		512	send_packet (sl);
		513	}
		514
		515	// returns true when the message needs special (read: perl) treatment
		516	static bool
		517	msg_is_special (const char *msg)
		518	{
		519	return msg [strcspn (msg, "<[&\n")];
		520	}
		521
		522	void
		523	client::send_msg (int color, const char type, const char msg)
		524	{
		525	if (msg_is_special (msg))
		526	cfperl_send_msg (this, color, type, msg);
		527	else if (can_msg)
		528	send_packet_printf ("msg %d %s %s", color, type, msg);
		529	else if (color < 0)
		530	return; // client cannot handle this
		531	else
		532	send_packet_printf ("drawinfo %d %s", color, msg);
		533	}
		534
		535	void
		536	client::send_drawinfo (const char *msg, int flags)
		537	{
		538	send_msg (flags, "log", msg);
		539	}
		540
432	/******************************************************************************	541	/***********************************************************************
433	*	542	*
434	* statistics logging functions.	543	* packet functions/utilities
435	*	544	*
436	******************************************************************************/	545	**********************************************************************/
437		546
438	#ifdef CS_LOGSTATS	547	packet::packet (const char *name)
439
440	/* cst_tot is for the life of the server, cst_last is for the last series of
441	* stats
442	*/
443	CS_Stats cst_tot, cst_lst;
444
445	/**
446	* Writes out the gathered stats. We clear cst_lst.
447	*/
448	void
449	write_cs_stats (void)
450	{	548	{
451	time_t now = time (NULL);	549	reset ();
452		550
453	/* If no connections recently, don't both to log anything */	551	int len = strlen (name);
454	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)	552	memcpy (cur, name, len); cur += len;
455	return;	553	*cur++ = ' ';
456
457	/* CSSTAT is put in so scripts can easily find the line */
458	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
459	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
460	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
461	cst_lst.ibytes = 0;
462	cst_lst.obytes = 0;
463	cst_lst.time_start = now;
464	}	554	}
465	#endif
466		555
		556	packet &packet::operator <<(const ber32 v)
		557	{
		558	enum { maxlen = 32 / 7 + 1};
		559	uint8 buf[maxlen];
		560	uint8 *p = buf + maxlen;
		561	uint32 val = v.val;
		562
		563	*--p = val & 0x7F;
		564
		565	while (val > 0x7F)
		566	{
		567	val >>= 7;
		568	*--p = (val & 0x7F) \| 0x80;
		569	}
		570
		571	return *this << data (p, buf + maxlen - p);
		572	}
		573
		574	packet &packet::operator <<(const data &v)
		575	{
		576	if (room () < v.len)
		577	reset ();
		578	else
		579	{
		580	if (v.len)
		581	{
		582	memcpy (cur, v.ptr, v.len);
		583	cur += v.len;
		584	}
		585	}
		586
		587	return *this;
		588	}
		589
		590	packet &packet::operator <<(const data8 &v)
		591	{
		592	unsigned int len = min (v.len, 0x00FF);
		593	return *this << uint8 (len) << data (v.ptr, len);
		594	}
		595
		596	packet &packet::operator <<(const data16 &v)
		597	{
		598	unsigned int len = min (v.len, 0xFFFF);
		599	return *this << uint16 (len) << data (v.ptr, len);
		600	}
		601
		602	packet &packet::operator <<(const char *v)
		603	{
		604	return *this << data (v, strlen (v ? v : 0));
		605	}
		606
		607	void
		608	packet::vprintf (const char *format, va_list ap)
		609	{
		610	int size = room ();
		611
		612	int len = vsnprintf ((char *)cur, size, format, ap);
		613
		614	if (len >= size)
		615	return reset ();
		616
		617	cur += len;
		618	}
		619

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.18 by root, Thu Dec 14 05:09:32 2006 UTC vs. Revision 1.49 by root, Sun Jul 1 05:00:20 2007 UTC

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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.18 by root, Thu Dec 14 05:09:32 2006 UTC vs.
Revision 1.49 by root, Sun Jul 1 05:00:20 2007 UTC