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

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.22 by root, Fri Dec 15 19:59:20 2006 UTC vs.
Revision 1.98 by root, Wed Nov 16 23:42:03 2016 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 (C) 1992 Frank Tore Johansen	4	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5		5	*
6	This program is free software; you can redistribute it and/or modify	6	* Deliantra is free software: you can redistribute it and/or modify it under
7	it under the terms of the GNU General Public License as published by	7	* the terms of the Affero GNU General Public License as published by the
8	the Free Software Foundation; either version 2 of the License, or	8	* Free Software Foundation, either version 3 of the License, or (at your
9	(at your option) any later version.	9	* option) any later version.
10		10	*
11	This program is distributed in the hope that it will be useful,	11	* This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.	14	* GNU General Public License for more details.
15		15	*
16	You should have received a copy of the GNU General Public License	16	* You should have received a copy of the Affero GNU General Public License
17	along with this program; if not, write to the Free Software	17	* and the GNU General Public License along with this program. If not, see
18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.	18	* <http://www.gnu.org/licenses/>.
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 <sproto.h>	26	#include <sproto.h>
39	#include <cstdarg>	27	#include <cstdarg>
40		28
41	#ifdef __linux__	29	#if HAVE_TCP_INFO
42	# include <sys/types.h>	30	# include <sys/types.h>
43	# include <sys/socket.h>	31	# include <sys/socket.h>
44	# include <netinet/in.h>	32	# include <netinet/in.h>
45	# define TCP_HZ 1000 // sorry...
46	# include <netinet/tcp.h>	33	# include <netinet/tcp.h>
47	#endif	34	#endif
48		35
49	// 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,
50	// easily die in 20 seconds...	37	// forcing an ack regularly.
51	#define SOCKET_TIMEOUT1 10	38	#define IDLE_PING 2.
52	#define SOCKET_TIMEOUT2 20
53		39
54	void	40	void
55	client::flush ()	41	client::flush ()
56	{	42	{
57	#ifdef __linux__	43	if (destroyed ())
58	// check time of last ack, and, if too old, kill connection	44	return;
59	struct tcp_info tcpi;
60	socklen_t len = sizeof (tcpi);
61
62	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
63	{
64	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
65
66	rtt = tcpi.tcpi_rtt;
67	rttvar = tcpi.tcpi_rttvar;
68
69	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s
70	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s
71	{
72	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
73	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
74	status = Ns_Dead;
75	}
76	}
77	#endif
78		45
79	/**	46	/**
80	* Writes data to socket.	47	* Writes data to socket.
81	*	48	*
82	* When the socket is clear to write, and we have backlogged data, this	49	* When the socket is clear to write, and we have backlogged data, this
83	* is called to write it out.	50	* is called to write it out.
84	*/	51	*/
85		52
86	if (!outputbuffer.len \|\| socket_ev.poll () & PE_W)	53	// write a nop to the socket at least every IDLE_PING seconds.
		54	if (!outputbuffer.len)
		55	{
		56	if (last_send + IDLE_PING <= NOW && pl && pl->active)
		57	{
		58	// this is a bit ugly, but map1a seems to be the only
		59	// nop'able command and it is quite small.
		60	packet sl ("map1a");
		61	send_packet (sl);
		62	}
		63	else
		64	return;
		65	}
		66
		67	if (socket_ev.poll () & EV_WRITE)
87	return;	68	return;
88		69
		70	last_send = NOW;
89	write_outputbuffer ();	71	write_outputbuffer ();
90	}	72	}
91		73
92	void	74	void
93	client::write_outputbuffer ()	75	client::write_outputbuffer ()
103	/* wrap back to start of buffer */	85	/* wrap back to start of buffer */
104	if (outputbuffer.start == SOCKETBUFSIZE)	86	if (outputbuffer.start == SOCKETBUFSIZE)
105	outputbuffer.start = 0;	87	outputbuffer.start = 0;
106		88
107	outputbuffer.len -= res;	89	outputbuffer.len -= res;
108	#ifdef CS_LOGSTATS
109	cst_tot.obytes += res;
110	cst_lst.obytes += res;
111	#endif
112	}	90	}
113	else if (res == 0)	91	else if (res == 0)
114	{	92	{
115	LOG (llevError, "socket write failed, connection closed.\n");	93	LOG (llevError, "socket write failed, connection closed.\n");
116	status = Ns_Dead;	94	destroy ();
117	return;	95	return;
118	}	96	}
119	else if (errno == EINTR)	97	else if (errno == EINTR)
120	{	98	{
121	// just retry	99	// just retry
122	}	100	}
123	else if (errno == EAGAIN)	101	else if (errno == EAGAIN)
124	{	102	{
125	// delay till ready	103	// delay till ready
126	socket_ev.poll (socket_ev.poll () \| PE_W);	104	socket_ev.poll (socket_ev.poll () \| EV_WRITE);
127	socket_ev.start ();	105	socket_ev.start ();
128	return;	106	return;
129	}	107	}
130	else	108	else
131	{	109	{
132	LOG (llevError, "socket write failed: %s\n", strerror (errno));	110	LOG (llevError, "socket write failed: %s\n", strerror (errno));
133	status = Ns_Dead;	111	destroy ();
134	return;	112	return;
135	}	113	}
136	}	114	}
137		115
138	socket_ev.poll (socket_ev.poll () & ~PE_W);	116	socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
139	}	117	}
140		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 ("msg %d log 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
141	/***********************************************************************	153	/*****************************************************************************
142	*	154	* Start of command dispatch area.
143	* packet functions/utilities	155	* The commands here are protocol commands.
144	*
145	**********************************************************************/	156	****************************************************************************/
146		157
147	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	static void
		163	NopCmd (char , int, client )
148	{	164	{
149	if (room () < v.len)	165	// do nothing
150	reset ();	166	}
		167
		168	/**
		169	* Dispatch table for the server.
		170	*/
		171	static struct packet_type packets[] = {
		172	{"command", PC(PlayerCmd) PF_PLAYING \| PF_COMMAND },
		173
		174	{"examine", PC(ExamineCmd) PF_PLAYING },
		175	{"ex", PC(ExCmd) PF_PLAYING },
		176	{"apply", PC(ApplyCmd) PF_PLAYING },
		177	{"lookat", PC(LookAt) PF_PLAYING },
		178	{"lock", PC(LockItem) PF_PLAYING },
		179	{"mark", PC(MarkItem) PF_PLAYING },
		180	{"move", PC(MoveCmd) PF_PLAYING },
		181	{"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
		182	{"mapredraw", PC(MapRedrawCmd) 0 },
		183	{"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
		184
		185	{"reply", SC(ReplyCmd) 0 },
		186	{"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
		187	{"addme", SC(AddMeCmd) 0 },
		188	{"askface", SC(AskFaceCmd) 0 },
		189	{"requestinfo", SC(RequestInfo) 0 },
		190	{"setsound", SC(SetSound) 0 },
		191	{"setup", SC(SetUp) 0 },
		192	{"version", SC(VersionCmd) 0 },
		193
		194	{"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
		195	};
		196
		197	bool
		198	client::may_execute (const packet_type *pkt) const
		199	{
		200	return (!(pkt->flags & PF_PLAYER) \|\| pl)
		201	&& (!(pkt->flags & PF_PLAYING) \|\| state == ST_PLAYING);
		202	}
		203
		204	// HACK: some commands currently should be executed
		205	// even when the player is frozen. this hack detects
		206	// those commands. it should be folded into may_execute,
		207	// but kept seperate to emphasise the hack aspect, i.e.
		208	// do it better, then remove.
		209	static bool
		210	always_immediate (const client ns, const packet_type pkt, const char *data, int len)
		211	{
		212	if (!(pkt->flags & PF_COMMAND))
		213	return false;
		214
		215	if (!ns->pl \|\| !ns->pl->ob \|\| !ns->pl->ob->map)
		216	return false;
		217
		218	if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
		219	if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
		220	if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
		221	if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
		222	if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
		223
		224	if (len == 7 && !strcmp (data, "suicide")) 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	{
		237	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
		238	pl->need_updated_stats ();
		239	}
		240	else
		241	((void ()(char , int, client ))pkt->cb)((char )data, datalen, this);
		242	}
151	else	243	else
		244	send_packet_printf ("msg %d log ERROR: you cannot execute '%s' now.", NDI_RED \| NDI_REPLY, pkt->name);
		245	}
		246
		247	bool
		248	client::handle_packet ()
		249	{
		250	int pkt_len = next_packet ();
		251
		252	if (!pkt_len)
		253	return false;
		254	else if (pkt_len < 0)
		255	{
		256	LOG (llevError, "read error on player %s\n",
		257	pl && pl->ob ? &pl->ob->name : "[anonymous]");
		258	destroy ();
		259	return false;
152	{	260	}
153	if (v.len)	261
		262	uint8_t save_byte = inbuf [pkt_len]; // rather ugly
		263	inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
		264
		265	/* First, break out beginning word. There are at least
		266	* a few commands that do not have any paremeters. If
		267	* we get such a command, don't worry about trying
		268	* to break it up.
		269	*/
		270	int datalen;
		271	char data = strchr ((char )inbuf + 2, ' ');
		272
		273	if (data)
		274	{
		275	*data++ = 0;
		276	datalen = pkt_len - (data - (char *)inbuf);
		277	}
		278	else
		279	{
		280	data = (char *)inbuf + 2; // better read garbage than segfault
		281	datalen = 0;
		282	}
		283
		284	for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt)
		285	if (!strcmp ((char *)inbuf + 2, pkt->name))
154	{	286	{
155	memcpy (cur, v.ptr, v.len);	287	if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
156	cur += v.len;	288	queue_command (pkt, data, datalen);
		289	else
		290	execute (pkt, data, datalen);
		291
		292	goto next_packet;
		293	}
		294
		295	// If we get here, we didn't find a valid command.
		296	send_packet_printf ("msg %d log ERROR: command '%s' not supported.", NDI_RED \| NDI_REPLY, (char *)inbuf + 2);
		297
		298	next_packet:
		299	inbuf [pkt_len] = save_byte; // rather ugly
		300	skip_packet (pkt_len);
		301
		302	// input buffer has space again
		303	socket_ev.poll (socket_ev.poll () \| EV_READ);
		304
		305	return true;
		306	}
		307
		308	void
		309	client::inbuf_handle ()
		310	{
		311	if (!handle_packet ())
		312	return;
		313
		314	while (handle_packet ())
		315	;
		316
		317	flush ();
		318	}
		319
		320	// callback called when socket is either readable or writable
		321	void
		322	client::socket_cb (iow &w, int revents)
		323	{
		324	//TODO remove when we have better socket cleanup logic
		325	if (destroyed ())
		326	{
		327	socket_ev.poll (0);
		328	return;
		329	}
		330
		331	if (revents & EV_WRITE)
		332	{
		333	write_outputbuffer ();
		334
		335	if (!outputbuffer.len)
		336	socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
		337	}
		338
		339	if (revents & EV_READ)
		340	{
		341	int amount;
		342	uint8 *rbuf;
		343
		344	if (ws_version)
157	}	345	{
158	}	346	if (ws_inbuf_len + 2048 > ws_inbuf_alloc)
		347	ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096);
159		348
160	return *this;	349	rbuf = ws_inbuf + ws_inbuf_len;
161	}	350	amount = ws_inbuf_alloc - ws_inbuf_len;
162
163	packet &packet::operator <<(const data8 &v)
164	{
165	unsigned int len = min (v.len, 0x00FF);
166	return *this << uint8 (len) << data (v.ptr, len);
167	}
168
169	packet &packet::operator <<(const data16 &v)
170	{
171	unsigned int len = min (v.len, 0xFFFF);
172	return *this << uint16 (len) << data (v.ptr, len);
173	}
174
175	packet &packet::operator <<(const char *v)
176	{
177	return *this << data (v, strlen (v ? v : 0));
178	}
179
180	void
181	packet::printf (const char *format, ...)
182	{
183	int size = room ();
184
185	va_list ap;
186	va_start (ap, format);
187	int len = vsnprintf ((char *)cur, size, format, ap);
188	va_end (ap);
189
190	if (len >= size)
191	return reset ();
192
193	cur += len;
194	}
195
196	/******************************************************************************
197	*
198	* Start of read routines.
199	*
200	******************************************************************************/
201
202	int
203	client::read_packet ()
204	{
205	for (;;)
206	{
207	if (inbuf_len >= 2)
208	{	351	}
209	unsigned int pkt_len = (inbuf [0] << 8) \| inbuf [1];	352	else
210
211	if (inbuf_len >= 2 + pkt_len)
212	return pkt_len + 2;
213	}	353	{
214		354	rbuf = inbuf + inbuf_len;
215	int amount = sizeof (inbuf) - inbuf_len;	355	amount = sizeof (inbuf) - inbuf_len;
216
217	if (amount <= 0)
218	{	356	}
219	LOG (llevError, "packet too large");//TODO
220	return -1;
221	}
222
223	amount = read (fd, inbuf + inbuf_len, amount);
224		357
225	if (!amount)	358	if (!amount)
226	{	359	{
227	status = Ns_Dead;	360	// input buffer full
		361	LOG (llevError, "input buffer overflow.");
		362	destroy ();
228	return -1;	363	return;
		364	}
		365
		366	amount = read (fd, rbuf, amount);
		367
		368	if (!amount)
		369	{
		370	destroy ();
		371	return;
229	}	372	}
230	else if (amount < 0)	373	else if (amount < 0)
231	{	374	{
232	if (errno != EAGAIN && errno != EINTR)	375	if (errno != EAGAIN && errno != EINTR)
233	{	376	{
234	LOG (llevError, "read error: %s\n", strerror (errno));	377	LOG (llevError, "read error: %s\n", strerror (errno));
		378	destroy ();
235	return -1;	379	return;
236	}	380	}
237		381
238	return 0;	382	// should not be here, normally
		383	}
		384
		385	if (ws_version)
239	}	386	{
		387	ws_inbuf_len += amount;
240		388
		389	while (ws_inbuf_len)
		390	{
		391	if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask
		392	break;
		393
		394	int d = 2;
		395	int fin = ws_inbuf [0] & 0x80;
		396	int op = ws_inbuf [0] & 0x0f;
		397	int len = ws_inbuf [1] & 0x7f;
		398
		399	if (len == 126)
		400	{
		401	len = (ws_inbuf [2] << 8) \| ws_inbuf [3];
		402	d += 2;
		403	}
		404	else if (len == 127)
		405	{
		406	if (ws_inbuf_len < 2 + 8)
		407	return;
		408
		409	// we don't do extra long frames, if a browser wants to send >2**32 bytes,
		410	// there are bigger issues to fix.
		411	len = (ws_inbuf [8] << 8) \| ws_inbuf [9];
		412	d += 8;
		413	}
		414
		415	// we only continue if we have a complete frame
		416	if (ws_inbuf_len < d + 4 + len)
		417	return;
		418
		419	switch (op)
		420	{
		421	case 0: op = ws_inbuf_type; break; // continuation
		422	case 1: ws_inbuf_type = 1; break; // utf-8
		423	case 2: ws_inbuf_type = 2; break; // binary
		424	}
		425
		426	if (len > sizeof (inbuf) - inbuf_len)
		427	{
		428	// input buffer full
		429	LOG (llevError, "input buffer overflow (ws).");
		430	destroy ();
		431	return;
		432	}
		433
		434	uint8 *buf = inbuf + inbuf_len + 2;
		435
		436	for (int i = 0; i < len; ++i)
		437	buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)];
		438
		439	// remove frame
		440	ws_inbuf_len -= d + 4 + len;
		441	memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len);
		442
		443	switch (op)
		444	{
		445	case 1: // utf-8
		446	// utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases
		447	// but we assume that these extra-long packets will be rare.
		448	{
		449	uint8 *a = buf;
		450	uint8 *b = a;
		451	uint8 *c = a + len;
		452
		453	for (; a < c; ++a, ++b)
		454	{
		455	b = a;
		456
		457	if (*a >= 0x80)
		458	*b = (a [0] & 0x1f) << 6 \| (a [1] & 0x3f), ++a;
		459	}
		460
		461	len -= a - b;
		462	}
		463	/* FALLTHROUGH */
		464	case 2: // binary
		465	inbuf_len += len;
		466
		467	if (fin)
		468	{
		469	inbuf [0] = inbuf_len >> 8;
		470	inbuf [1] = inbuf_len;
		471
		472	inbuf_len += 2;
		473
		474	inbuf_handle ();
		475	}
		476	break;
		477
		478	case 9: // ping
		479	{
		480	// send pong - we assume ping messages are <64k
		481	// as we can't handle >10k at the moment anyway.
		482	uint8 hdr [] = { 0x8a, 126, len >> 8, len };
		483	send (hdr, sizeof (hdr));
		484	send (inbuf + inbuf_len, len);
		485	}
		486	break;
		487
		488	case 10: // pong
		489	break;
		490
		491	case 8: // close
		492	default:
		493	destroy ();
		494	return;
		495	}
		496	}
		497	}
		498	else
		499	{
241	inbuf_len += amount;	500	inbuf_len += amount;
242		501	inbuf_handle ();
243	cst_tot.ibytes += amount;	502	}
244	cst_lst.ibytes += amount;
245	}	503	}
246	}
247
248	void
249	client::skip_packet (int len)
250	{
251	inbuf_len -= len;
252	memmove (inbuf, inbuf + len, inbuf_len);
253	}	504	}
254		505
255	/*******************************************************************************	506	/*******************************************************************************
256	*	507	*
257	* Start of write related routines.	508	* Start of write related routines.
…		…
266	*/	517	*/
267	void	518	void
268	client::send (void *buf_, int len)	519	client::send (void *buf_, int len)
269	{	520	{
270	char buf = (char )buf_;	521	char buf = (char )buf_;
271	char *pos = buf;
272	int amt = 0;
273		522
274	if (status == Ns_Dead \|\| !buf)	523	if (destroyed () \|\| !buf)
275	{
276	LOG (llevDebug, "Write_To_Socket called with dead socket\n");
277	return;	524	return;
278	}
279		525
280	if ((len + outputbuffer.len) > SOCKETBUFSIZE)	526	if (len + outputbuffer.len > SOCKETBUFSIZE)
281	{	527	{
282	LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", fd);	528	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
283	status = Ns_Dead;	529	// shutdown the socket, this is safer than destroying it immediately
		530	// as lots of code in the callchain might still access the map etc.
		531	shutdown (fd, SHUT_RDWR);
284	return;	532	return;
285	}	533	}
286		534
287	int avail, end;	535	int avail, end;
288		536
…		…
306	}	554	}
307		555
308	outputbuffer.len += len;	556	outputbuffer.len += len;
309	}	557	}
310		558
311	void
312	client::socket_cb (iow &w, int got)
313	{
314	write_outputbuffer ();
315
316	if (!outputbuffer.len)
317	socket_ev.poll (socket_ev.poll () & ~PE_W);
318	}
319
320	/**	559	/**
321	* Takes a string of data, and writes it out to the socket. A very handy	560	* Takes a string of data, and writes it out to the socket. A very handy
322	* shortcut function.	561	* shortcut function.
323	*/	562	*/
324	void	563	void
325	client::send_packet (packet &sl)	564	client::send_packet (packet &sl)
326	{	565	{
327	if (status == Ns_Dead)	566	if (destroyed ())
328	return;	567	return;
329		568
330	if (sl.length () >= MAXSOCKBUF)	569	if (sl.length () > MAXSOCKBUF)
331	{	570	{
332	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());	571	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
333	/* Almost certainly we've overflowed a buffer, so quit now to make	572	/* Almost certainly we've overflowed a buffer, so quit now to make
334	* it easier to debug.	573	* it easier to debug.
335	*/	574	*/
…		…
337	}	576	}
338		577
339	if (!sl.length ())	578	if (!sl.length ())
340	return;	579	return;
341		580
		581	if (ws_version == 8)
		582	{
		583	static uint8 buf [MAXSOCKBUF * 2 + 4];
		584
		585	uint8 *b = buf + 4;
		586	for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a)
		587	{
		588	if (*a < 0x80)
		589	b++ = a;
		590	else
		591	{
		592	b++ = 0xc0 \| ((a >> 6) & 0x1f);
		593	b++ = 0x80 \| ( a & 0x3f);
		594	}
		595	}
		596
		597	assert (b - buf < sizeof (buf));
		598
		599	int len = b - (buf + 4);
		600
		601	if (len < 126)
		602	{
		603	buf [2] = 0x81;
		604	buf [3] = len;
		605
		606	send (buf + 2, len + 2);
		607	}
		608	else
		609	{
		610	buf [0] = 0x81;
		611	buf [1] = 126;
		612	buf [2] = len >> 8;
		613	buf [3] = len;
		614
		615	send (buf, len + 4);
		616	}
		617	}
		618	else if (ws_version == 13)
		619	{
		620	int len = sl.length ();
		621
		622	if (len < 126)
		623	{
		624	uint8 hdr [] = { 0x82, len };
		625	send (hdr, sizeof (hdr));
		626	}
		627	else
		628	{
		629	uint8 hdr [] = { 0x82, 126, len >> 8, len };
		630	send (hdr, sizeof (hdr));
		631	}
		632
		633	send (sl.buf_ + sl.hdrlen, len);
		634	}
		635	else
		636	{
342	assert (sl.hdrlen == 2);	637	assert (sl.hdrlen == 2);
343		638
344	sl.buf_ [0] = sl.length () >> 8;	639	sl.buf_ [0] = sl.length () >> 8;
345	sl.buf_ [1] = sl.length () ;	640	sl.buf_ [1] = sl.length () ;
346		641
347	send (sl.buf_, sl.length () + sl.hdrlen);	642	send (sl.buf_, sl.length () + sl.hdrlen);
		643	}
348	}	644	}
349		645
350	void	646	void
351	client::send_packet (const char *buf, int len)	647	client::send_packet (const char *buf, int len)
352	{	648	{
…		…
360	client::send_packet (const char *buf)	656	client::send_packet (const char *buf)
361	{	657	{
362	send_packet (buf, strlen (buf));	658	send_packet (buf, strlen (buf));
363	}	659	}
364		660
		661	void
		662	client::send_packet_printf (const char *format, ...)
		663	{
		664	packet sl;
		665
		666	va_list ap;
		667	va_start (ap, format);
		668	sl.vprintf (format, ap);
		669	va_end (ap);
		670
		671	send_packet (sl);
		672	}
		673
		674	void
		675	client::send_msg (int color, const char type, const char msg)
		676	{
		677	if (!msg \|\| !type) // it can happen (for example, missing attack messages cause this)
		678	{
		679	LOG (logBacktrace \| llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
		680	return;
		681	}
		682
		683	int len = strlen (msg);
		684
		685	if (!(color & NDI_VERBATIM)
		686	&& (msg_is_special (msg)
		687	\|\| (type [0] == 'c' && type [1] == '/') \|\| len > (MAXSOCKBUF - 128)))
		688	cfperl_send_msg (this, color, type, msg);
		689	else
		690	send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
		691	}
		692
365	/******************************************************************************	693	/***********************************************************************
366	*	694	*
367	* statistics logging functions.	695	* packet functions/utilities
368	*	696	*
369	******************************************************************************/	697	**********************************************************************/
370		698
371	#ifdef CS_LOGSTATS	699	packet::packet (const char *name)
372
373	/* cst_tot is for the life of the server, cst_last is for the last series of
374	* stats
375	*/
376	CS_Stats cst_tot, cst_lst;
377
378	/**
379	* Writes out the gathered stats. We clear cst_lst.
380	*/
381	void
382	write_cs_stats (void)
383	{	700	{
384	time_t now = time (NULL);	701	reset ();
385		702
386	/* If no connections recently, don't both to log anything */	703	int len = strlen (name);
387	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)	704	memcpy (cur, name, len); cur += len;
388	return;	705	*cur++ = ' ';
389
390	/* CSSTAT is put in so scripts can easily find the line */
391	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
392	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
393	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
394	cst_lst.ibytes = 0;
395	cst_lst.obytes = 0;
396	cst_lst.time_start = now;
397	}	706	}
398	#endif
399		707
		708	packet &packet::operator <<(const ber32 v)
		709	{
		710	enum { maxlen = 32 / 7 + 1 };
		711	uint8 buf[maxlen];
		712	uint8 *p = buf + maxlen;
		713	uint32 val = v.val;
		714
		715	*--p = val & 0x7F;
		716
		717	while (val > 0x7F)
		718	{
		719	val >>= 7;
		720	*--p = (val & 0x7F) \| 0x80;
		721	}
		722
		723	return *this << data (p, buf + maxlen - p);
		724	}
		725
		726	packet &packet::operator <<(const data &v)
		727	{
		728	if (room () < v.len)
		729	reset ();
		730	else
		731	{
		732	if (v.len)
		733	{
		734	memcpy (cur, v.ptr, v.len);
		735	cur += v.len;
		736	}
		737	}
		738
		739	return *this;
		740	}
		741
		742	packet &packet::operator <<(const data8 &v)
		743	{
		744	unsigned int len = min (v.len, 0x00FF);
		745	return *this << uint8 (len) << data (v.ptr, len);
		746	}
		747
		748	packet &packet::operator <<(const data16 &v)
		749	{
		750	unsigned int len = min (v.len, 0xFFFF);
		751	return *this << uint16 (len) << data (v.ptr, len);
		752	}
		753
		754	packet &packet::operator <<(const char *v)
		755	{
		756	return *this << data (v, strlen (v ? v : 0));
		757	}
		758
		759	void
		760	packet::vprintf (const char *format, va_list ap)
		761	{
		762	int size = room ();
		763
		764	int len = vsnprintf ((char *)cur, size, format, ap);
		765
		766	if (len >= size)
		767	return reset ();
		768
		769	cur += len;
		770	}
		771

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.22 by root, Fri Dec 15 19:59:20 2006 UTC vs. Revision 1.98 by root, Wed Nov 16 23:42:03 2016 UTC

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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.22 by root, Fri Dec 15 19:59:20 2006 UTC vs.
Revision 1.98 by root, Wed Nov 16 23:42:03 2016 UTC