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

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.16 by root, Thu Dec 14 02:37:37 2006 UTC vs.
Revision 1.60 by root, Mon Oct 1 01:09:10 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	// force a packet when idle for more than this many seconds,
51	// easily die in 20 seconds...	37	// forcing an ack regularly.
52	#define SOCKET_TIMEOUT1 10	38	#define IDLE_PING 2.
53	#define SOCKET_TIMEOUT2 20
54		39
55	void	40	void
56	Socket_Flush (client_socket * ns)	41	client::flush ()
57	{	42	{
58	#ifdef __linux__	43	if (destroyed ())
59	// check time of last ack, and, if too old, kill connection	44	return;
60	struct tcp_info tcpi;
61	socklen_t len = sizeof (tcpi);
62		45
63	if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))	46	/**
64	{	47	* Writes data to socket.
65	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;	48	*
		49	* When the socket is clear to write, and we have backlogged data, this
		50	* is called to write it out.
		51	*/
66		52
67	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s	53	// write a nop to the socket at least every IDLE_NOP seconds.
68	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s	54	if (!outputbuffer.len)
69	{	55	{
70	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd,	56	if (last_send + IDLE_PING <= NOW && pl && pl->active)
71	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
72	ns->status = Ns_Dead;
73	}	57	{
		58	// this is a bit ugly, but map1/map1a seem to be the only
		59	// nop'able commands and they are quite small.
		60	packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
		61	send_packet (sl);
		62	}
		63	else
		64	return;
		65	}
		66
		67	if (socket_ev.poll () & PE_W)
		68	return;
		69
		70	last_send = NOW;
		71	write_outputbuffer ();
		72	}
		73
		74	void
		75	client::write_outputbuffer ()
		76	{
		77	while (outputbuffer.len)
74	}	78	{
		79	int res = write (fd, outputbuffer.data + outputbuffer.start,
		80	min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
75		81
76	int val;	82	if (res > 0)
		83	{
		84	outputbuffer.start += res;
		85	/* wrap back to start of buffer */
		86	if (outputbuffer.start == SOCKETBUFSIZE)
		87	outputbuffer.start = 0;
77		88
78	val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));	89	outputbuffer.len -= res;
79	val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));	90	}
80	#endif	91	else if (res == 0)
81	}	92	{
		93	LOG (llevError, "socket write failed, connection closed.\n");
		94	destroy ();
		95	return;
		96	}
		97	else if (errno == EINTR)
		98	{
		99	// just retry
		100	}
		101	else if (errno == EAGAIN)
		102	{
		103	// delay till ready
		104	socket_ev.poll (socket_ev.poll () \| PE_W);
		105	socket_ev.start ();
		106	return;
		107	}
		108	else
		109	{
		110	LOG (llevError, "socket write failed: %s\n", strerror (errno));
		111	destroy ();
		112	return;
		113	}
		114	}
82		115
		116	socket_ev.poll (socket_ev.poll () & ~PE_W);
		117	}
		118
		119	/******************************************************************************
		120	*
		121	* Start of read routines.
		122	*
		123	******************************************************************************/
		124
		125	int
		126	client::next_packet ()
		127	{
		128	if (inbuf_len >= 2)
		129	{
		130	int pkt_len = (inbuf [0] << 8) \| inbuf [1];
		131
		132	if (inbuf_len >= 2 + pkt_len)
		133	return 2 + pkt_len;
		134
		135	if (inbuf_len == sizeof (inbuf))
		136	{
		137	send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED \| NDI_REPLY);
		138	destroy ();
		139	return -1;
		140	}
		141	}
		142
		143	return 0;
		144	}
		145
		146	void
		147	client::skip_packet (int len)
		148	{
		149	inbuf_len -= len;
		150	memmove (inbuf, inbuf + len, inbuf_len);
		151	}
		152
83	/***********************************************************************	153	/*****************************************************************************
84	*	154	* Start of command dispatch area.
85	* packet functions/utilities	155	* The commands here are protocol commands.
86	*
87	**********************************************************************/	156	****************************************************************************/
88		157
89	packet &packet::operator <<(const data &v)	158	// SocketCommand, PlayingCommand, should not exist with those ugly casts
		159	#define SC(cb) (void )static_cast<void ()(char , int, client )>(cb),
		160	#define PC(cb) (void )static_cast<void ()(char , int, player )>(cb), PF_PLAYER \|
		161
		162	/**
		163	* Dispatch table for the server.
		164	*/
		165	static struct packet_type packets[] = {
		166	{"ncom", PC(NewPlayerCmd) PF_PLAYING \| PF_COMMAND6 },
		167	{"command", PC(PlayerCmd) PF_PLAYING \| PF_COMMAND0 },
		168
		169	{"examine", PC(ExamineCmd) PF_PLAYING },
		170	{"ex", PC(ExCmd) PF_PLAYING },
		171	{"apply", PC(ApplyCmd) PF_PLAYING },
		172	{"lookat", PC(LookAt) PF_PLAYING },
		173	{"lock", PC(LockItem) PF_PLAYING },
		174	{"mark", PC(MarkItem) PF_PLAYING },
		175	{"move", PC(MoveCmd) PF_PLAYING },
		176	{"ext", PC(ExtCmd) 0 }, // CF+
		177	{"mapredraw", PC(MapRedrawCmd) 0 },
		178	{"mapinfo", PC(MapInfoCmd) 0 }, // CF+
		179
		180	{"reply", SC(ReplyCmd) 0 },
		181	{"exti", SC(ExtiCmd) 0 }, // CF+
		182	{"addme", SC(AddMeCmd) 0 },
		183	{"askface", SC(AskFaceCmd) 0 },
		184	{"requestinfo", SC(RequestInfo) 0 },
		185	{"setfacemode", SC(SetFaceMode) 0 },
		186	{"setsound", SC(SetSound) 0 },
		187	{"setup", SC(SetUp) 0 },
		188	{"version", SC(VersionCmd) 0 },
		189	{"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /Added: tchize /
		190	{"toggleextendedtext", SC(ToggleExtendedText) 0 }, /Added: tchize /
		191	{"asksmooth", SC(AskSmooth) 0 }, /Added: tchize (smoothing technologies) /
		192	};
		193
		194	bool
		195	client::may_execute (const packet_type *pkt) const
90	{	196	{
91	if (room () < v.len)	197	return (!(pkt->flags & PF_PLAYER) \|\| pl)
92	reset ();	198	&& (!(pkt->flags & PF_PLAYING) \|\| state == ST_PLAYING);
		199	}
		200
		201	// HACK: some commands currently should be executed
		202	// even when the player is frozen. this hack detects
		203	// those commands. it should be folded into may_execute,
		204	// but kept seperate to emphasise the hack aspect, i.e.
		205	// do it better, then remove.
		206	static bool
		207	always_immediate (const client ns, const packet_type pkt, const char *data, int len)
		208	{
		209	if (!(pkt->flags & (PF_COMMAND0 \| PF_COMMAND6)))
		210	return false;
		211
		212	if (!ns->pl \|\| !ns->pl->ob \|\| !ns->pl->ob->map)
		213	return false;
		214
		215	if (pkt->flags & PF_COMMAND6)
		216	{
		217	data += 6;
		218	len -= 6;
		219	}
		220
		221	if (len > 4 && !strncmp (data, "say " , 4))
		222	return true;
		223	if (len > 5 && !strncmp (data, "chat ", 5))
		224	return true;
		225
		226	return false;
		227	}
		228
		229	void
		230	client::execute (const packet_type pkt, char data, int datalen)
		231	{
		232	if (may_execute (pkt) \|\| always_immediate (this, pkt, data, datalen))
		233	{
		234	//TODO: only one format
		235	if (pkt->flags & PF_PLAYER)
		236	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
		237	else
		238	((void ()(char , int, client ))pkt->cb)((char )data, datalen, this);
		239	}
93	else	240	else
		241	send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED \| NDI_REPLY, pkt->name);
		242	}
		243
		244	bool
		245	client::handle_packet ()
		246	{
		247	int pkt_len = next_packet ();
		248
		249	if (!pkt_len)
		250	return false;
		251	else if (pkt_len < 0)
		252	{
		253	LOG (llevError, "read error on player %s\n",
		254	pl && pl->ob ? &pl->ob->name : "[anonymous]");
		255	destroy ();
		256	return false;
94	{	257	}
95	if (v.len)	258
		259	inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
		260
		261	/* First, break out beginning word. There are at least
		262	* a few commands that do not have any paremeters. If
		263	* we get such a command, don't worry about trying
		264	* to break it up.
		265	*/
		266	int datalen;
		267	char data = strchr ((char )inbuf + 2, ' ');
		268
		269	if (data)
		270	{
		271	*data++ = 0;
		272	datalen = pkt_len - (data - (char *)inbuf);
		273	}
		274	else
		275	{
		276	data = (char *)inbuf + 2; // better read garbage than segfault
		277	datalen = 0;
		278	}
		279
		280	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
		281	if (!strcmp ((char *)inbuf + 2, pkt->name))
96	{	282	{
97	memcpy (cur, v.ptr, v.len);	283	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
98	cur += v.len;	284	queue_command (pkt, data, datalen);
		285	else
		286	execute (pkt, data, datalen);
		287
		288	goto next_packet;
99	}	289	}
		290
		291	// If we get here, we didn't find a valid command.
		292	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED \| NDI_REPLY, (char *)inbuf + 2);
		293	next_packet:
		294	skip_packet (pkt_len);
		295
		296	// input buffer has space again
		297	socket_ev.poll (socket_ev.poll () \| PE_R);
		298
		299	return true;
		300	}
		301
		302	// callback called when socket is either readable or writable
		303	void
		304	client::socket_cb (iow &w, int got)
		305	{
		306	//TODO remove when we have better socket cleanup logic
		307	if (destroyed ())
100	}	308	{
101		309	socket_ev.poll (0);
102	return *this;	310	return;
103	}
104
105	packet &packet::operator <<(const data8 &v)
106	{
107	unsigned int len = min (v.len, 0x00FF);
108	return *this << uint8 (len) << data (v.ptr, len);
109	}
110
111	packet &packet::operator <<(const data16 &v)
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	}
137
138	/******************************************************************************
139	*
140	* Start of read routines.
141	*
142	******************************************************************************/
143
144	int
145	client_socket::read_packet ()
146	{
147	for (;;)
148	{	311	}
149	if (inbuf_len >= 2)
150	{
151	unsigned int pkt_len = (inbuf [0] << 8) \| inbuf [1];
152		312
153	if (inbuf_len >= 2 + pkt_len)	313	if (got & PE_W)
154	return pkt_len + 2;	314	{
155	}	315	write_outputbuffer ();
		316
		317	if (!outputbuffer.len)
		318	socket_ev.poll (socket_ev.poll () & ~PE_W);
		319	}
		320
		321	if (got & PE_R)
		322	{
		323	//TODO: rate-limit tcp connection in better ways, important
156		324
157	int amount = sizeof (inbuf) - inbuf_len;	325	int amount = sizeof (inbuf) - inbuf_len;
158		326
159	if (amount <= 0)	327	if (!amount)
160	{	328	{
161	LOG (llevError, "packet too large");//TODO	329	// input buffer full
		330	socket_ev.poll (socket_ev.poll () & ~PE_R);
162	return -1;	331	return;
163	}	332	}
164		333
165	amount = read (fd, inbuf + inbuf_len, amount);	334	amount = read (fd, inbuf + inbuf_len, amount);
166		335
167	if (!amount)	336	if (!amount)
168	{	337	{
169	status = Ns_Dead;	338	destroy ();
170	return -1;	339	return;
171	}	340	}
172	else if (amount < 0)	341	else if (amount < 0)
173	{	342	{
174	if (errno != EAGAIN && errno != EINTR)	343	if (errno != EAGAIN && errno != EINTR)
175	{	344	{
176	LOG (llevError, "read error: %s", strerror (errno));	345	LOG (llevError, "read error: %s\n", strerror (errno));
		346	destroy ();
177	return -1;	347	return;
178	}	348	}
179		349
180	return 0;	350	// should not be here, normally
		351	}
		352	else
181	}	353	{
182
183	inbuf_len += amount;	354	inbuf_len += amount;
184		355
185	cst_tot.ibytes += amount;	356	if (handle_packet ())
186	cst_lst.ibytes += amount;	357	{
187	}	358	while (handle_packet ())
188	}	359	;
189		360
190	void	361	flush ();
191	client_socket::skip_packet (int len)	362	}
192	{	363	}
193	inbuf_len -= len;	364	}
194	memmove (inbuf, inbuf + len, inbuf_len);
195	}	365	}
196		366
197	/*******************************************************************************	367	/*******************************************************************************
198	*	368	*
199	* Start of write related routines.	369	* Start of write related routines.
204	* Adds data to a socket buffer for whatever reason.	374	* Adds data to a socket buffer for whatever reason.
205	*	375	*
206	* ns is the socket we are adding the data to, buf is the start of the	376	* 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.	377	* data, and len is the number of bytes to add.
208	*/	378	*/
209		379	void
210	static void	380	client::send (void *buf_, int len)
211	add_to_buffer (client_socket ns, char buf, int len)
212	{	381	{
		382	char buf = (char )buf_;
		383
		384	if (destroyed () \|\| !buf)
		385	return;
		386
		387	if (len + outputbuffer.len > SOCKETBUFSIZE)
		388	{
		389	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
		390	// shutdown the socket, this is safer than destroying it immediately
		391	// as lots of code in the callchain might still access the map etc.
		392	shutdown (fd, SHUT_RDWR);
		393	return;
		394	}
		395
213	int avail, end;	396	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		397
222	/* data + end is where we start putting the new data. The last byte	398	/* data + end is where we start putting the new data. The last byte
223	* currently in use is actually data + end -1	399	* currently in use is actually data + end -1
224	*/	400	*/
225
226	end = ns->outputbuffer.start + ns->outputbuffer.len;	401	end = outputbuffer.start + outputbuffer.len;
227	/* The buffer is already in a wrapped state, so adjust end */	402	/* The buffer is already in a wrapped state, so adjust end */
228	if (end >= SOCKETBUFSIZE)	403	if (end >= SOCKETBUFSIZE)
229	end -= SOCKETBUFSIZE;	404	end -= SOCKETBUFSIZE;
230		405
231	avail = SOCKETBUFSIZE - end;	406	avail = SOCKETBUFSIZE - end;
232		407
233	/* We can all fit it behind the current data without wrapping */	408	/* We can all fit it behind the current data without wrapping */
234	if (avail >= len)	409	if (avail >= len)
235	memcpy (ns->outputbuffer.data + end, buf, len);	410	memcpy (outputbuffer.data + end, buf, len);
236	else	411	else
237	{	412	{
238	memcpy (ns->outputbuffer.data + end, buf, avail);	413	memcpy (outputbuffer.data + end, buf, avail);
239	memcpy (ns->outputbuffer.data, buf + avail, len - avail);	414	memcpy (outputbuffer.data, buf + avail, len - avail);
240	}	415	}
241		416
242	ns->outputbuffer.len += len;	417	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	}	418	}
374		419
375	/**	420	/**
376	* Takes a string of data, and writes it out to the socket. A very handy	421	* Takes a string of data, and writes it out to the socket. A very handy
377	* shortcut function.	422	* shortcut function.
378	*/	423	*/
379
380	void	424	void
381	client_socket::send_packet (packet &sl)	425	client::send_packet (packet &sl)
382	{	426	{
383	Send_With_Handling (this, &sl);	427	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;	428	return;
414		429
415	if (msg->length () >= MAXSOCKBUF)	430	if (sl.length () > MAXSOCKBUF)
416	{	431	{
417	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->length ());	432	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	433	/* Almost certainly we've overflowed a buffer, so quit now to make
419	* it easier to debug.	434	* it easier to debug.
420	*/	435	*/
421	abort ();	436	abort ();
422	}	437	}
423		438
424	sbuf[0] = ((uint32) (msg->length ()) >> 8);	439	if (!sl.length ())
425	sbuf[1] = ((uint32) (msg->length ()) );
426
427	if (ns->status != Ns_Old)
428	ns->send (sbuf, 2);
429
430	ns->send (msg->buf, msg->length ());
431	}
432
433	/******************************************************************************
434	*
435	* statistics logging functions.
436	*
437	******************************************************************************/
438
439	#ifdef CS_LOGSTATS
440
441	/* cst_tot is for the life of the server, cst_last is for the last series of
442	* stats
443	*/
444	CS_Stats cst_tot, cst_lst;
445
446	/**
447	* Writes out the gathered stats. We clear cst_lst.
448	*/
449	void
450	write_cs_stats (void)
451	{
452	time_t now = time (NULL);
453
454	/* If no connections recently, don't both to log anything */
455	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
456	return;	440	return;
457		441
458	/* CSSTAT is put in so scripts can easily find the line */	442	assert (sl.hdrlen == 2);
459	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
460	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
461	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
462	cst_lst.ibytes = 0;
463	cst_lst.obytes = 0;
464	cst_lst.max_conn = socket_info.nconns;
465	cst_lst.time_start = now;
466	}
467	#endif
468		443
		444	sl.buf_ [0] = sl.length () >> 8;
		445	sl.buf_ [1] = sl.length () ;
		446
		447	send (sl.buf_, sl.length () + sl.hdrlen);
		448	}
		449
		450	void
		451	client::send_packet (const char *buf, int len)
		452	{
		453	packet sl;
		454
		455	sl << data (buf, len);
		456	send_packet (sl);
		457	}
		458
		459	void
		460	client::send_packet (const char *buf)
		461	{
		462	send_packet (buf, strlen (buf));
		463	}
		464
		465	void
		466	client::send_packet_printf (const char *format, ...)
		467	{
		468	packet sl;
		469
		470	va_list ap;
		471	va_start (ap, format);
		472	sl.vprintf (format, ap);
		473	va_end (ap);
		474
		475	send_packet (sl);
		476	}
		477
		478	// returns true when the message needs special (read: perl) treatment
		479	static bool
		480	msg_is_special (const char *msg)
		481	{
		482	return msg [strcspn (msg, "<[&\n")];
		483	}
		484
		485	void
		486	client::send_msg (int color, const char type, const char msg)
		487	{
		488	if (!msg \|\| !type) // it can happen (for example, missing attack messages cause this)
		489	{
		490	LOG (logBacktrace \| llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
		491	return;
		492	}
		493
		494	int len = strlen (msg);
		495
		496	if (msg_is_special (msg) \|\| (type [0] == 'c' && type [1] == '/') \|\| len > (MAXSOCKBUF - 128))
		497	cfperl_send_msg (this, color, type, msg);
		498	else if (can_msg)
		499	send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
		500	else if (color < 0)
		501	return; // client cannot handle this
		502	else
		503	send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
		504	}
		505
		506	void
		507	client::send_drawinfo (const char *msg, int flags)
		508	{
		509	send_msg (flags, "log", msg);
		510	}
		511
		512	/***********************************************************************
		513	*
		514	* packet functions/utilities
		515	*
		516	**********************************************************************/
		517
		518	packet::packet (const char *name)
		519	{
		520	reset ();
		521
		522	int len = strlen (name);
		523	memcpy (cur, name, len); cur += len;
		524	*cur++ = ' ';
		525	}
		526
		527	packet &packet::operator <<(const ber32 v)
		528	{
		529	enum { maxlen = 32 / 7 + 1};
		530	uint8 buf[maxlen];
		531	uint8 *p = buf + maxlen;
		532	uint32 val = v.val;
		533
		534	*--p = val & 0x7F;
		535
		536	while (val > 0x7F)
		537	{
		538	val >>= 7;
		539	*--p = (val & 0x7F) \| 0x80;
		540	}
		541
		542	return *this << data (p, buf + maxlen - p);
		543	}
		544
		545	packet &packet::operator <<(const data &v)
		546	{
		547	if (room () < v.len)
		548	reset ();
		549	else
		550	{
		551	if (v.len)
		552	{
		553	memcpy (cur, v.ptr, v.len);
		554	cur += v.len;
		555	}
		556	}
		557
		558	return *this;
		559	}
		560
		561	packet &packet::operator <<(const data8 &v)
		562	{
		563	unsigned int len = min (v.len, 0x00FF);
		564	return *this << uint8 (len) << data (v.ptr, len);
		565	}
		566
		567	packet &packet::operator <<(const data16 &v)
		568	{
		569	unsigned int len = min (v.len, 0xFFFF);
		570	return *this << uint16 (len) << data (v.ptr, len);
		571	}
		572
		573	packet &packet::operator <<(const char *v)
		574	{
		575	return *this << data (v, strlen (v ? v : 0));
		576	}
		577
		578	void
		579	packet::vprintf (const char *format, va_list ap)
		580	{
		581	int size = room ();
		582
		583	int len = vsnprintf ((char *)cur, size, format, ap);
		584
		585	if (len >= size)
		586	return reset ();
		587
		588	cur += len;
		589	}
		590

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.16 by root, Thu Dec 14 02:37:37 2006 UTC vs. Revision 1.60 by root, Mon Oct 1 01:09:10 2007 UTC

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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.16 by root, Thu Dec 14 02:37:37 2006 UTC vs.
Revision 1.60 by root, Mon Oct 1 01:09:10 2007 UTC