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

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.14 by root, Thu Dec 14 01:21:58 2006 UTC vs.
Revision 1.59 by root, Sun Sep 30 20:22:25 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 (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	* packet functions/utilities
86	*
87	**********************************************************************/
88
89	packet &packet::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 () & 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)
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	packet &packet::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 () \| 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	}
105		115
106	packet &packet::operator <<(const data16 &v)	116	socket_ev.poll (socket_ev.poll () & ~PE_W);
107	{
108	unsigned int len = min (v.len, 0xFFFF);
109	return *this << uint16 (len) << data (v.ptr, len);
110	}
111
112	packet &packet::operator <<(const char *v)
113	{
114	return *this << data (v, strlen (v ? v : 0));
115	}
116
117	void
118	packet::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 && !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	}
		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;
		257	}
		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))
		282	{
		283	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
		284	queue_command (pkt, data, datalen);
		285	else
		286	execute (pkt, data, datalen);
		287
		288	goto next_packet;
		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 ())
		308	{
		309	socket_ev.poll (0);
		310	return;
		311	}
		312
		313	if (got & PE_W)
		314	{
		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
146		324
147	int amount = sizeof (inbuf) - inbuf_len;	325	int amount = sizeof (inbuf) - inbuf_len;
148		326
149	if (amount <= 0)	327	if (!amount)
150	{	328	{
151	LOG (llevError, "packet too large");//TODO	329	// input buffer full
		330	socket_ev.poll (socket_ev.poll () & ~PE_R);
152	return -1;	331	return;
153	}	332	}
154		333
155	amount = read (fd, inbuf + inbuf_len, amount);	334	amount = read (fd, inbuf + inbuf_len, amount);
156		335
157	if (!amount)	336	if (!amount)
158	{	337	{
159	status = Ns_Dead;	338	destroy ();
160	return -1;	339	return;
161	}	340	}
162	else if (amount < 0)	341	else if (amount < 0)
163	{	342	{
164	if (errno != EAGAIN && errno != EINTR)	343	if (errno != EAGAIN && errno != EINTR)
165	{	344	{
166	LOG (llevError, "read error: %s", strerror (errno));	345	LOG (llevError, "read error: %s\n", strerror (errno));
		346	destroy ();
167	return -1;	347	return;
168	}	348	}
169		349
170	return 0;	350	// should not be here, normally
		351	}
		352	else
171	}	353	{
172
173	inbuf_len += amount;	354	inbuf_len += amount;
174		355
175	cst_tot.ibytes += amount;	356	cmd_ev.start ();
176	cst_lst.ibytes += amount;	357	}
177	}	358	}
178	}	359	}
179		360
		361	// called whenever we have additional commands to process
180	void	362	void
181	NewSocket::skip_packet (int len)	363	client::cmd_cb (iw &w)
182	{	364	{
183	inbuf_len -= len;	365	if (handle_packet ())
184	memmove (inbuf, inbuf + len, inbuf_len);	366	w.start ();
		367	else
		368	flush ();
185	}	369	}
186		370
187	/*******************************************************************************	371	/*******************************************************************************
188	*	372	*
189	* Start of write related routines.	373	* Start of write related routines.
194	* Adds data to a socket buffer for whatever reason.	378	* Adds data to a socket buffer for whatever reason.
195	*	379	*
196	* ns is the socket we are adding the data to, buf is the start of the	380	* 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.	381	* data, and len is the number of bytes to add.
198	*/	382	*/
199		383	void
200	static void	384	client::send (void *buf_, int len)
201	add_to_buffer (NewSocket ns, char buf, int len)
202	{	385	{
		386	char buf = (char )buf_;
		387
		388	if (destroyed () \|\| !buf)
		389	return;
		390
		391	if (len + outputbuffer.len > SOCKETBUFSIZE)
		392	{
		393	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
		394	// shutdown the socket, this is safer than destroying it immediately
		395	// as lots of code in the callchain might still access the map etc.
		396	shutdown (fd, SHUT_RDWR);
		397	return;
		398	}
		399
203	int avail, end;	400	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		401
212	/* data + end is where we start putting the new data. The last byte	402	/* data + end is where we start putting the new data. The last byte
213	* currently in use is actually data + end -1	403	* currently in use is actually data + end -1
214	*/	404	*/
215
216	end = ns->outputbuffer.start + ns->outputbuffer.len;	405	end = outputbuffer.start + outputbuffer.len;
217	/* The buffer is already in a wrapped state, so adjust end */	406	/* The buffer is already in a wrapped state, so adjust end */
218	if (end >= SOCKETBUFSIZE)	407	if (end >= SOCKETBUFSIZE)
219	end -= SOCKETBUFSIZE;	408	end -= SOCKETBUFSIZE;
220		409
221	avail = SOCKETBUFSIZE - end;	410	avail = SOCKETBUFSIZE - end;
222		411
223	/* We can all fit it behind the current data without wrapping */	412	/* We can all fit it behind the current data without wrapping */
224	if (avail >= len)	413	if (avail >= len)
225	memcpy (ns->outputbuffer.data + end, buf, len);	414	memcpy (outputbuffer.data + end, buf, len);
226	else	415	else
227	{	416	{
228	memcpy (ns->outputbuffer.data + end, buf, avail);	417	memcpy (outputbuffer.data + end, buf, avail);
229	memcpy (ns->outputbuffer.data, buf + avail, len - avail);	418	memcpy (outputbuffer.data, buf + avail, len - avail);
230	}	419	}
231		420
232	ns->outputbuffer.len += len;	421	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	}	422	}
364		423
365	/**	424	/**
366	* Takes a string of data, and writes it out to the socket. A very handy	425	* Takes a string of data, and writes it out to the socket. A very handy
367	* shortcut function.	426	* shortcut function.
368	*/	427	*/
369
370	void	428	void
371	NewSocket::send_packet (packet &sl)	429	client::send_packet (packet &sl)
372	{	430	{
373	Send_With_Handling (this, &sl);	431	if (destroyed ())
374	}
375
376	void
377	NewSocket::send_packet (const char *buf, int len)
378	{
379	packet sl;
380
381	sl << data (buf, len);
382	send_packet (sl);
383	}
384
385	void
386	NewSocket::send_packet (const char *buf)
387	{
388	send_packet (buf, strlen (buf));
389	}
390
391	/**
392	* Calls Write_To_Socket to send data to the client.
393	*
394	* The only difference in this function is that we take a packet
395	*, and we prepend the length information.
396	*/
397	void
398	Send_With_Handling (NewSocket ns, packet msg)
399	{
400	unsigned char sbuf[4];
401
402	if (ns->status == Ns_Dead \|\| !msg)
403	return;	432	return;
404		433
405	if (msg->len >= MAXSOCKBUF)	434	if (sl.length () > MAXSOCKBUF)
406	{	435	{
407	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len);	436	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
408	/* Almost certainly we've overflowed a buffer, so quite now to make	437	/* Almost certainly we've overflowed a buffer, so quit now to make
409	* it easier to debug.	438	* it easier to debug.
410	*/	439	*/
411	abort ();	440	abort ();
412	}	441	}
413	sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF;
414	sbuf[1] = ((uint32) (msg->len)) & 0xFF;
415	if (ns->status != Ns_Old)
416	Write_To_Socket (ns, (char *) sbuf, 2);
417	Write_To_Socket (ns, (char *) msg->buf, msg->len);
418	}
419		442
420	/******************************************************************************	443	if (!sl.length ())
421	*
422	* statistics logging functions.
423	*
424	******************************************************************************/
425
426	#ifdef CS_LOGSTATS
427
428	/* cst_tot is for the life of the server, cst_last is for the last series of
429	* stats
430	*/
431	CS_Stats cst_tot, cst_lst;
432
433	/**
434	* Writes out the gathered stats. We clear cst_lst.
435	*/
436	void
437	write_cs_stats (void)
438	{
439	time_t now = time (NULL);
440
441	/* If no connections recently, don't both to log anything */
442	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
443	return;	444	return;
444		445
445	/* CSSTAT is put in so scripts can easily find the line */	446	assert (sl.hdrlen == 2);
446	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
447	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
448	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
449	cst_lst.ibytes = 0;
450	cst_lst.obytes = 0;
451	cst_lst.max_conn = socket_info.nconns;
452	cst_lst.time_start = now;
453	}
454	#endif
455		447
		448	sl.buf_ [0] = sl.length () >> 8;
		449	sl.buf_ [1] = sl.length () ;
		450
		451	send (sl.buf_, sl.length () + sl.hdrlen);
		452	}
		453
		454	void
		455	client::send_packet (const char *buf, int len)
		456	{
		457	packet sl;
		458
		459	sl << data (buf, len);
		460	send_packet (sl);
		461	}
		462
		463	void
		464	client::send_packet (const char *buf)
		465	{
		466	send_packet (buf, strlen (buf));
		467	}
		468
		469	void
		470	client::send_packet_printf (const char *format, ...)
		471	{
		472	packet sl;
		473
		474	va_list ap;
		475	va_start (ap, format);
		476	sl.vprintf (format, ap);
		477	va_end (ap);
		478
		479	send_packet (sl);
		480	}
		481
		482	// returns true when the message needs special (read: perl) treatment
		483	static bool
		484	msg_is_special (const char *msg)
		485	{
		486	return msg [strcspn (msg, "<[&\n")];
		487	}
		488
		489	void
		490	client::send_msg (int color, const char type, const char msg)
		491	{
		492	if (!msg \|\| !type) // it can happen (for example, missing attack messages cause this)
		493	{
		494	LOG (logBacktrace \| llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
		495	return;
		496	}
		497
		498	int len = strlen (msg);
		499
		500	if (msg_is_special (msg) \|\| (type [0] == 'c' && type [1] == '/') \|\| len > (MAXSOCKBUF - 128))
		501	cfperl_send_msg (this, color, type, msg);
		502	else if (can_msg)
		503	send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
		504	else if (color < 0)
		505	return; // client cannot handle this
		506	else
		507	send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
		508	}
		509
		510	void
		511	client::send_drawinfo (const char *msg, int flags)
		512	{
		513	send_msg (flags, "log", msg);
		514	}
		515
		516	/***********************************************************************
		517	*
		518	* packet functions/utilities
		519	*
		520	**********************************************************************/
		521
		522	packet::packet (const char *name)
		523	{
		524	reset ();
		525
		526	int len = strlen (name);
		527	memcpy (cur, name, len); cur += len;
		528	*cur++ = ' ';
		529	}
		530
		531	packet &packet::operator <<(const ber32 v)
		532	{
		533	enum { maxlen = 32 / 7 + 1};
		534	uint8 buf[maxlen];
		535	uint8 *p = buf + maxlen;
		536	uint32 val = v.val;
		537
		538	*--p = val & 0x7F;
		539
		540	while (val > 0x7F)
		541	{
		542	val >>= 7;
		543	*--p = (val & 0x7F) \| 0x80;
		544	}
		545
		546	return *this << data (p, buf + maxlen - p);
		547	}
		548
		549	packet &packet::operator <<(const data &v)
		550	{
		551	if (room () < v.len)
		552	reset ();
		553	else
		554	{
		555	if (v.len)
		556	{
		557	memcpy (cur, v.ptr, v.len);
		558	cur += v.len;
		559	}
		560	}
		561
		562	return *this;
		563	}
		564
		565	packet &packet::operator <<(const data8 &v)
		566	{
		567	unsigned int len = min (v.len, 0x00FF);
		568	return *this << uint8 (len) << data (v.ptr, len);
		569	}
		570
		571	packet &packet::operator <<(const data16 &v)
		572	{
		573	unsigned int len = min (v.len, 0xFFFF);
		574	return *this << uint16 (len) << data (v.ptr, len);
		575	}
		576
		577	packet &packet::operator <<(const char *v)
		578	{
		579	return *this << data (v, strlen (v ? v : 0));
		580	}
		581
		582	void
		583	packet::vprintf (const char *format, va_list ap)
		584	{
		585	int size = room ();
		586
		587	int len = vsnprintf ((char *)cur, size, format, ap);
		588
		589	if (len >= size)
		590	return reset ();
		591
		592	cur += len;
		593	}
		594

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.14 by root, Thu Dec 14 01:21:58 2006 UTC vs. Revision 1.59 by root, Sun Sep 30 20:22:25 2007 UTC

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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.14 by root, Thu Dec 14 01:21:58 2006 UTC vs.
Revision 1.59 by root, Sun Sep 30 20:22:25 2007 UTC