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

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.13 by root, Thu Dec 14 01:12:35 2006 UTC vs.
Revision 1.66 by root, Fri Sep 19 01:39:45 2008 UTC

…		…
1	/*	1	/*
2	CrossFire, A Multiplayer game for X-windows	2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3		3	*
		4	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra 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	* Deliantra 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 <support@deliantra.net>
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 (NewSocket * 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	{
74	}	58	// this is a bit ugly, but map1/map1a seem to be the only
75		59	// nop'able commands and they are quite small.
76	int val;	60	packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
77		61	send_packet (sl);
78	val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));	62	}
79	val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));	63	else
80	#endif	64	return;
81	}
82
83	/***********************************************************************
84	*
85	* SockList functions/utilities
86	*
87	**********************************************************************/
88
89	SockList &SockList::operator <<(const data &v)
90	{
91	if (v.len)
92	{	65	}
93	memcpy (buf + len, v.ptr, v.len);	66
94	len += v.len;	67	if (socket_ev.poll () & EV_WRITE)
		68	return;
		69
		70	last_send = NOW;
		71	write_outputbuffer ();
		72	}
		73
		74	void
		75	client::write_outputbuffer ()
		76	{
		77	while (outputbuffer.len)
95	}	78	{
		79	int res = write (fd, outputbuffer.data + outputbuffer.start,
		80	min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
96		81
97	return *this;	82	if (res > 0)
98	}	83	{
		84	outputbuffer.start += res;
		85	/* wrap back to start of buffer */
		86	if (outputbuffer.start == SOCKETBUFSIZE)
		87	outputbuffer.start = 0;
99		88
100	SockList &SockList::operator <<(const data8 &v)	89	outputbuffer.len -= res;
101	{	90	}
102	unsigned int len = min (v.len, 0x00FF);	91	else if (res == 0)
103	return *this << uint8 (len) << data (v.ptr, len);	92	{
104	}	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 () \| EV_WRITE);
		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	}
105		115
106	SockList &SockList::operator <<(const data16 &v)	116	socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
107	{
108	unsigned int len = min (v.len, 0xFFFF);
109	return *this << uint16 (len) << data (v.ptr, len);
110	}
111
112	SockList &SockList::operator <<(const char *v)
113	{
114	return *this << data (v, strlen (v ? v : 0));
115	}
116
117	void
118	SockList::printf (const char *format, ...)
119	{
120	va_list ap;
121	va_start (ap, format);
122
123	len += vsnprintf ((char *)buf + len, MAXSOCKBUF, format, ap);
124
125	va_end (ap);
126	}	117	}
127		118
128	/******************************************************************************	119	/******************************************************************************
129	*	120	*
130	* Start of read routines.	121	* Start of read routines.
131	*	122	*
132	******************************************************************************/	123	******************************************************************************/
133		124
134	int	125	int
135	NewSocket::read_packet ()	126	client::next_packet ()
136	{	127	{
137	for (;;)
138	{
139	if (inbuf_len >= 2)	128	if (inbuf_len >= 2)
140	{	129	{
141	unsigned int pkt_len = (inbuf [0] << 8) \| inbuf [1];	130	int pkt_len = (inbuf [0] << 8) \| inbuf [1];
142		131
143	if (inbuf_len >= 2 + pkt_len)	132	if (inbuf_len >= 2 + pkt_len)
144	return pkt_len + 2;	133	return 2 + pkt_len;
		134
		135	if (inbuf_len == sizeof (inbuf))
145	}	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
		153	/*****************************************************************************
		154	* Start of command dispatch area.
		155	* The commands here are protocol commands.
		156	****************************************************************************/
		157
		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
		196	{
		197	return (!(pkt->flags & PF_PLAYER) \|\| pl)
		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 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
		222	if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
		223	if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
		224
		225	if (len == 7 && !strcmp (data, "suicide")) return true;
		226
		227	return false;
		228	}
		229
		230	void
		231	client::execute (const packet_type pkt, char data, int datalen)
		232	{
		233	if (may_execute (pkt) \|\| always_immediate (this, pkt, data, datalen))
		234	{
		235	//TODO: only one format
		236	if (pkt->flags & PF_PLAYER)
		237	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
		238	else
		239	((void ()(char , int, client ))pkt->cb)((char )data, datalen, this);
		240	}
		241	else
		242	send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED \| NDI_REPLY, pkt->name);
		243	}
		244
		245	bool
		246	client::handle_packet ()
		247	{
		248	int pkt_len = next_packet ();
		249
		250	if (!pkt_len)
		251	return false;
		252	else if (pkt_len < 0)
		253	{
		254	LOG (llevError, "read error on player %s\n",
		255	pl && pl->ob ? &pl->ob->name : "[anonymous]");
		256	destroy ();
		257	return false;
		258	}
		259
		260	inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
		261
		262	/* First, break out beginning word. There are at least
		263	* a few commands that do not have any paremeters. If
		264	* we get such a command, don't worry about trying
		265	* to break it up.
		266	*/
		267	int datalen;
		268	char data = strchr ((char )inbuf + 2, ' ');
		269
		270	if (data)
		271	{
		272	*data++ = 0;
		273	datalen = pkt_len - (data - (char *)inbuf);
		274	}
		275	else
		276	{
		277	data = (char *)inbuf + 2; // better read garbage than segfault
		278	datalen = 0;
		279	}
		280
		281	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
		282	if (!strcmp ((char *)inbuf + 2, pkt->name))
		283	{
		284	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
		285	queue_command (pkt, data, datalen);
		286	else
		287	execute (pkt, data, datalen);
		288
		289	goto next_packet;
		290	}
		291
		292	// If we get here, we didn't find a valid command.
		293	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED \| NDI_REPLY, (char *)inbuf + 2);
		294	next_packet:
		295	skip_packet (pkt_len);
		296
		297	// input buffer has space again
		298	socket_ev.poll (socket_ev.poll () \| EV_READ);
		299
		300	return true;
		301	}
		302
		303	// callback called when socket is either readable or writable
		304	void
		305	client::socket_cb (iow &w, int revents)
		306	{
		307	//TODO remove when we have better socket cleanup logic
		308	if (destroyed ())
		309	{
		310	socket_ev.poll (0);
		311	return;
		312	}
		313
		314	if (revents & EV_WRITE)
		315	{
		316	write_outputbuffer ();
		317
		318	if (!outputbuffer.len)
		319	socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
		320	}
		321
		322	if (revents & EV_READ)
		323	{
		324	//TODO: rate-limit tcp connection in better ways, important
146		325
147	int amount = sizeof (inbuf) - inbuf_len;	326	int amount = sizeof (inbuf) - inbuf_len;
148		327
149	if (amount <= 0)	328	if (!amount)
150	{	329	{
151	LOG (llevError, "packet too large");//TODO	330	// input buffer full
		331	socket_ev.poll (socket_ev.poll () & ~EV_READ);
152	return -1;	332	return;
153	}	333	}
154		334
155	amount = read (fd, inbuf + inbuf_len, amount);	335	amount = read (fd, inbuf + inbuf_len, amount);
156		336
157	if (!amount)	337	if (!amount)
158	{	338	{
159	status = Ns_Dead;	339	destroy ();
160	return -1;	340	return;
161	}	341	}
162	else if (amount < 0)	342	else if (amount < 0)
163	{	343	{
164	if (errno != EAGAIN && errno != EINTR)	344	if (errno != EAGAIN && errno != EINTR)
165	{	345	{
166	LOG (llevError, "read error: %s", strerror (errno));	346	LOG (llevError, "read error: %s\n", strerror (errno));
		347	destroy ();
167	return -1;	348	return;
168	}	349	}
169		350
170	return 0;	351	// should not be here, normally
		352	}
		353	else
171	}	354	{
172
173	inbuf_len += amount;	355	inbuf_len += amount;
174		356
175	cst_tot.ibytes += amount;	357	if (handle_packet ())
176	cst_lst.ibytes += amount;	358	{
177	}	359	while (handle_packet ())
178	}	360	;
179		361
180	void	362	flush ();
181	NewSocket::skip_packet (int len)	363	}
182	{	364	}
183	inbuf_len -= len;	365	}
184	memmove (inbuf, inbuf + len, inbuf_len);
185	}	366	}
186		367
187	/*******************************************************************************	368	/*******************************************************************************
188	*	369	*
189	* Start of write related routines.	370	* Start of write related routines.
194	* Adds data to a socket buffer for whatever reason.	375	* Adds data to a socket buffer for whatever reason.
195	*	376	*
196	* ns is the socket we are adding the data to, buf is the start of the	377	* ns is the socket we are adding the data to, buf is the start of the
197	* data, and len is the number of bytes to add.	378	* data, and len is the number of bytes to add.
198	*/	379	*/
199		380	void
200	static void	381	client::send (void *buf_, int len)
201	add_to_buffer (NewSocket ns, char buf, int len)
202	{	382	{
		383	char buf = (char )buf_;
		384
		385	if (destroyed () \|\| !buf)
		386	return;
		387
		388	if (len + outputbuffer.len > SOCKETBUFSIZE)
		389	{
		390	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
		391	// shutdown the socket, this is safer than destroying it immediately
		392	// as lots of code in the callchain might still access the map etc.
		393	shutdown (fd, SHUT_RDWR);
		394	return;
		395	}
		396
203	int avail, end;	397	int avail, end;
204
205	if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE)
206	{
207	LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd);
208	ns->status = Ns_Dead;
209	return;
210	}
211		398
212	/* data + end is where we start putting the new data. The last byte	399	/* data + end is where we start putting the new data. The last byte
213	* currently in use is actually data + end -1	400	* currently in use is actually data + end -1
214	*/	401	*/
215
216	end = ns->outputbuffer.start + ns->outputbuffer.len;	402	end = outputbuffer.start + outputbuffer.len;
217	/* The buffer is already in a wrapped state, so adjust end */	403	/* The buffer is already in a wrapped state, so adjust end */
218	if (end >= SOCKETBUFSIZE)	404	if (end >= SOCKETBUFSIZE)
219	end -= SOCKETBUFSIZE;	405	end -= SOCKETBUFSIZE;
220		406
221	avail = SOCKETBUFSIZE - end;	407	avail = SOCKETBUFSIZE - end;
222		408
223	/* We can all fit it behind the current data without wrapping */	409	/* We can all fit it behind the current data without wrapping */
224	if (avail >= len)	410	if (avail >= len)
225	memcpy (ns->outputbuffer.data + end, buf, len);	411	memcpy (outputbuffer.data + end, buf, len);
226	else	412	else
227	{	413	{
228	memcpy (ns->outputbuffer.data + end, buf, avail);	414	memcpy (outputbuffer.data + end, buf, avail);
229	memcpy (ns->outputbuffer.data, buf + avail, len - avail);	415	memcpy (outputbuffer.data, buf + avail, len - avail);
230	}	416	}
231		417
232	ns->outputbuffer.len += len;	418	outputbuffer.len += len;
233	#if 0
234	LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start);
235	#endif
236	}
237
238	/**
239	* Writes data to socket.
240	*
241	* When the socket is clear to write, and we have backlogged data, this
242	* is called to write it out.
243	*/
244	void
245	write_socket_buffer (NewSocket * ns)
246	{
247	int amt, max;
248
249	if (ns->outputbuffer.len == 0)
250	{
251	LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd);
252	return;
253	}
254
255	do
256	{
257	max = SOCKETBUFSIZE - ns->outputbuffer.start;
258	if (ns->outputbuffer.len < max)
259	max = ns->outputbuffer.len;
260
261	do
262	{
263	amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max);
264	}
265	while ((amt < 0) && (errno == EINTR));
266
267	if (amt < 0)
268	{ /* We got an error */
269
270	if (errno != EWOULDBLOCK)
271	{
272	LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno));
273	ns->status = Ns_Dead;
274	return;
275	}
276	else
277	{ /* EWOULDBLOCK */
278	/* can't write it, so store it away. */
279	ns->can_write = 0;
280	return;
281	}
282	}
283	ns->outputbuffer.start += amt;
284	/* wrap back to start of buffer */
285	if (ns->outputbuffer.start == SOCKETBUFSIZE)
286	ns->outputbuffer.start = 0;
287	ns->outputbuffer.len -= amt;
288	#ifdef CS_LOGSTATS
289	cst_tot.obytes += amt;
290	cst_lst.obytes += amt;
291	#endif
292	}
293	while (ns->outputbuffer.len > 0);
294	}
295
296	/**
297	* This writes data to the socket. - It is very low level -
298	* all we try and do is write out the data to the socket
299	* provided (ns). buf is the data to write, len is the number
300	* of bytes to write. IT doesn't return anything - rather, it
301	* updates the ns structure if we get an error.
302	*/
303	void
304	Write_To_Socket (NewSocket * ns, char *buf, int len)
305	{
306	int amt = 0;
307	char *pos = buf;
308
309	if (ns->status == Ns_Dead \|\| !buf)
310	{
311	LOG (llevDebug, "Write_To_Socket called with dead socket\n");
312	return;
313	}
314
315	#ifndef __GNU__ /* This caused problems on Hurd */
316	if (!ns->can_write)
317	{
318	add_to_buffer (ns, buf, len);
319	return;
320	}
321	#endif
322	/* If we manage to write more than we wanted, take it as a bonus */
323	while (len > 0)
324	{
325
326	do
327	{
328	amt = write (ns->fd, pos, len);
329	}
330	while ((amt < 0) && (errno == EINTR));
331
332	if (amt < 0)
333	{ /* We got an error */
334	if (errno != EWOULDBLOCK)
335	{
336	LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */
337	errno, strerror (errno));
338	ns->status = Ns_Dead;
339	return;
340	}
341	else
342	{ /* EWOULDBLOCK */
343	/* can't write it, so store it away. */
344	add_to_buffer (ns, pos, len);
345	ns->can_write = 0;
346	return;
347	}
348	}
349	/* amt gets set to 0 above in blocking code, so we do this as
350	* an else if to make sure we don't reprocess it.
351	*/
352	else if (amt == 0)
353	{
354	LOG (llevError, "Write_To_Socket: No data written out.\n");
355	}
356	len -= amt;
357	pos += amt;
358	#ifdef CS_LOGSTATS
359	cst_tot.obytes += amt;
360	cst_lst.obytes += amt;
361	#endif
362	}
363	}	419	}
364		420
365	/**	421	/**
366	* Takes a string of data, and writes it out to the socket. A very handy	422	* Takes a string of data, and writes it out to the socket. A very handy
367	* shortcut function.	423	* shortcut function.
368	*/	424	*/
369
370	void	425	void
371	NewSocket::send_packet (SockList &sl)	426	client::send_packet (packet &sl)
372	{	427	{
373	Send_With_Handling (this, &sl);	428	if (destroyed ())
374	}
375
376	void
377	NewSocket::send_packet (const char *buf, int len)
378	{
379	SockList sl (MAXSOCKBUF);
380
381	sl << data (buf, len);
382	send_packet (sl);
383	sl.free ();
384	}
385
386	void
387	NewSocket::send_packet (const char *buf)
388	{
389	send_packet (buf, strlen (buf));
390	}
391
392	/**
393	* Calls Write_To_Socket to send data to the client.
394	*
395	* The only difference in this function is that we take a SockList
396	*, and we prepend the length information.
397	*/
398	void
399	Send_With_Handling (NewSocket ns, SockList msg)
400	{
401	unsigned char sbuf[4];
402
403	if (ns->status == Ns_Dead \|\| !msg)
404	return;	429	return;
405		430
406	if (msg->len >= MAXSOCKBUF)	431	if (sl.length () > MAXSOCKBUF)
407	{	432	{
408	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len);	433	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
409	/* Almost certainly we've overflowed a buffer, so quite now to make	434	/* Almost certainly we've overflowed a buffer, so quit now to make
410	* it easier to debug.	435	* it easier to debug.
411	*/	436	*/
412	abort ();	437	abort ();
413	}	438	}
414	sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF;
415	sbuf[1] = ((uint32) (msg->len)) & 0xFF;
416	if (ns->status != Ns_Old)
417	Write_To_Socket (ns, (char *) sbuf, 2);
418	Write_To_Socket (ns, (char *) msg->buf, msg->len);
419	}
420		439
421	/******************************************************************************	440	if (!sl.length ())
422	*
423	* statistics logging functions.
424	*
425	******************************************************************************/
426
427	#ifdef CS_LOGSTATS
428
429	/* cst_tot is for the life of the server, cst_last is for the last series of
430	* stats
431	*/
432	CS_Stats cst_tot, cst_lst;
433
434	/**
435	* Writes out the gathered stats. We clear cst_lst.
436	*/
437	void
438	write_cs_stats (void)
439	{
440	time_t now = time (NULL);
441
442	/* If no connections recently, don't both to log anything */
443	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
444	return;	441	return;
445		442
446	/* CSSTAT is put in so scripts can easily find the line */	443	assert (sl.hdrlen == 2);
447	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
448	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
449	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
450	cst_lst.ibytes = 0;
451	cst_lst.obytes = 0;
452	cst_lst.max_conn = socket_info.nconns;
453	cst_lst.time_start = now;
454	}
455	#endif
456		444
		445	sl.buf_ [0] = sl.length () >> 8;
		446	sl.buf_ [1] = sl.length () ;
		447
		448	send (sl.buf_, sl.length () + sl.hdrlen);
		449	}
		450
		451	void
		452	client::send_packet (const char *buf, int len)
		453	{
		454	packet sl;
		455
		456	sl << data (buf, len);
		457	send_packet (sl);
		458	}
		459
		460	void
		461	client::send_packet (const char *buf)
		462	{
		463	send_packet (buf, strlen (buf));
		464	}
		465
		466	void
		467	client::send_packet_printf (const char *format, ...)
		468	{
		469	packet sl;
		470
		471	va_list ap;
		472	va_start (ap, format);
		473	sl.vprintf (format, ap);
		474	va_end (ap);
		475
		476	send_packet (sl);
		477	}
		478
		479	void
		480	client::send_msg (int color, const char type, const char msg)
		481	{
		482	if (!msg \|\| !type) // it can happen (for example, missing attack messages cause this)
		483	{
		484	LOG (logBacktrace \| llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
		485	return;
		486	}
		487
		488	int len = strlen (msg);
		489
		490	if (!(color & NDI_VERBATIM)
		491	&& (msg_is_special (msg)
		492	\|\| (type [0] == 'c' && type [1] == '/') \|\| len > (MAXSOCKBUF - 128)))
		493	cfperl_send_msg (this, color, type, msg);
		494	else if (can_msg)
		495	send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
		496	else if (color < 0)
		497	return; // client cannot handle this
		498	else
		499	send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
		500	}
		501
		502	void
		503	client::send_drawinfo (const char *msg, int flags)
		504	{
		505	send_msg (flags, "log", msg);
		506	}
		507
		508	/***********************************************************************
		509	*
		510	* packet functions/utilities
		511	*
		512	**********************************************************************/
		513
		514	packet::packet (const char *name)
		515	{
		516	reset ();
		517
		518	int len = strlen (name);
		519	memcpy (cur, name, len); cur += len;
		520	*cur++ = ' ';
		521	}
		522
		523	packet &packet::operator <<(const ber32 v)
		524	{
		525	enum { maxlen = 32 / 7 + 1};
		526	uint8 buf[maxlen];
		527	uint8 *p = buf + maxlen;
		528	uint32 val = v.val;
		529
		530	*--p = val & 0x7F;
		531
		532	while (val > 0x7F)
		533	{
		534	val >>= 7;
		535	*--p = (val & 0x7F) \| 0x80;
		536	}
		537
		538	return *this << data (p, buf + maxlen - p);
		539	}
		540
		541	packet &packet::operator <<(const data &v)
		542	{
		543	if (room () < v.len)
		544	reset ();
		545	else
		546	{
		547	if (v.len)
		548	{
		549	memcpy (cur, v.ptr, v.len);
		550	cur += v.len;
		551	}
		552	}
		553
		554	return *this;
		555	}
		556
		557	packet &packet::operator <<(const data8 &v)
		558	{
		559	unsigned int len = min (v.len, 0x00FF);
		560	return *this << uint8 (len) << data (v.ptr, len);
		561	}
		562
		563	packet &packet::operator <<(const data16 &v)
		564	{
		565	unsigned int len = min (v.len, 0xFFFF);
		566	return *this << uint16 (len) << data (v.ptr, len);
		567	}
		568
		569	packet &packet::operator <<(const char *v)
		570	{
		571	return *this << data (v, strlen (v ? v : 0));
		572	}
		573
		574	void
		575	packet::vprintf (const char *format, va_list ap)
		576	{
		577	int size = room ();
		578
		579	int len = vsnprintf ((char *)cur, size, format, ap);
		580
		581	if (len >= size)
		582	return reset ();
		583
		584	cur += len;
		585	}
		586

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.13 by root, Thu Dec 14 01:12:35 2006 UTC vs. Revision 1.66 by root, Fri Sep 19 01:39:45 2008 UTC

Diff Legend

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.13 by root, Thu Dec 14 01:12:35 2006 UTC vs.
Revision 1.66 by root, Fri Sep 19 01:39:45 2008 UTC