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

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.5 by root, Sun Sep 10 13:43:33 2006 UTC vs.
Revision 1.26 by root, Tue Dec 19 04:58:05 2006 UTC

…		…
1
2	/*
3	* static char *rcsid_sockets_c =
4	* "$Id: lowlevel.C,v 1.5 2006/09/10 13:43:33 root Exp $";
5	*/
6
7	/*	1	/*
8	CrossFire, A Multiplayer game for X-windows	2	CrossFire, A Multiplayer game for X-windows
9		3
10	Copyright (C) 1992 Frank Tore Johansen	4	Copyright (C) 1992 Frank Tore Johansen
11		5
39	*/	33	*/
40		34
41	using namespace std;	35	using namespace std;
42		36
43	#include <global.h>	37	#include <global.h>
44	#include <newclient.h>
45	#include <sproto.h>	38	#include <sproto.h>
		39	#include <cstdarg>
46		40
47	#ifdef __linux__	41	#ifdef __linux__
48	# include <sys/types.h>	42	# include <sys/types.h>
49	# include <sys/socket.h>	43	# include <sys/socket.h>
50	# include <netinet/in.h>	44	# include <netinet/in.h>
51	# define TCP_HZ 1000 // sorry...
52	# include <netinet/tcp.h>	45	# include <netinet/tcp.h>
53	#endif	46	#endif
54		47
55	// use a really low timeout, as it doesn't cost any bandwidth, and you can	48	// use a really low timeout, as it doesn't cost any bandwidth, and you can
56	// easily die in 20 seconds...	49	// easily die in 20 seconds...
57	#define SOCKET_TIMEOUT1 10	50	#define SOCKET_TIMEOUT1 10 * 1000
58	#define SOCKET_TIMEOUT2 20	51	#define SOCKET_TIMEOUT2 20 * 1000
59		52
60	void	53	void
61	Socket_Flush (NewSocket * ns)	54	client::flush ()
62	{	55	{
63	#ifdef __linux__	56	#ifdef __linux__
64	// check time of last ack, and, if too old, kill connection	57	// check time of last ack, and, if too old, kill connection
65	struct tcp_info tcpi;	58	struct tcp_info tcpi;
66	socklen_t len = sizeof (tcpi);	59	socklen_t len = sizeof (tcpi);
67		60
68	if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))	61	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
69	{	62	{
70	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;	63	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
71		64
		65	rtt = tcpi.tcpi_rtt;
		66	rttvar = tcpi.tcpi_rttvar;
		67
72	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s	68	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s
73	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s	69	&& SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s
74	{	70	{
75	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd,	71	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
76	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);	72	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
77	ns->status = Ns_Dead;	73	destroy ();
78	}	74	}
79	}	75	}
80
81	int val;
82
83	val = 0;
84	setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
85	val = 1;
86	setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
87	#endif	76	#endif
88	}
89		77
		78	/**
		79	* Writes data to socket.
		80	*
		81	* When the socket is clear to write, and we have backlogged data, this
		82	* is called to write it out.
		83	*/
		84
		85	if (!outputbuffer.len \|\| socket_ev.poll () & PE_W)
		86	return;
		87
		88	write_outputbuffer ();
		89	}
		90
		91	void
		92	client::write_outputbuffer ()
		93	{
		94	while (outputbuffer.len)
		95	{
		96	int res = write (fd, outputbuffer.data + outputbuffer.start,
		97	min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
		98
		99	if (res > 0)
		100	{
		101	outputbuffer.start += res;
		102	/* wrap back to start of buffer */
		103	if (outputbuffer.start == SOCKETBUFSIZE)
		104	outputbuffer.start = 0;
		105
		106	outputbuffer.len -= res;
		107	#ifdef CS_LOGSTATS
		108	cst_tot.obytes += res;
		109	cst_lst.obytes += res;
		110	#endif
		111	}
		112	else if (res == 0)
		113	{
		114	LOG (llevError, "socket write failed, connection closed.\n");
		115	destroy ();
		116	return;
		117	}
		118	else if (errno == EINTR)
		119	{
		120	// just retry
		121	}
		122	else if (errno == EAGAIN)
		123	{
		124	// delay till ready
		125	socket_ev.poll (socket_ev.poll () \| PE_W);
		126	socket_ev.start ();
		127	return;
		128	}
		129	else
		130	{
		131	LOG (llevError, "socket write failed: %s\n", strerror (errno));
		132	destroy ();
		133	return;
		134	}
		135	}
		136
		137	socket_ev.poll (socket_ev.poll () & ~PE_W);
		138	}
		139
		140	/******************************************************************************
		141	*
		142	* Start of read routines.
		143	*
		144	******************************************************************************/
		145
		146	int
		147	client::next_packet ()
		148	{
		149	if (inbuf_len >= 2)
		150	{
		151	int pkt_len = (inbuf [0] << 8) \| inbuf [1];
		152
		153	if (inbuf_len >= 2 + pkt_len)
		154	return 2 + pkt_len;
		155
		156	if (inbuf_len == sizeof (inbuf))
		157	{
		158	send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED);
		159	destroy ();
		160	return -1;
		161	}
		162	}
		163
		164	return 0;
		165	}
		166
		167	void
		168	client::skip_packet (int len)
		169	{
		170	inbuf_len -= len;
		171	memmove (inbuf, inbuf + len, inbuf_len);
		172	}
		173
90	/***********************************************************************	174	/*****************************************************************************
91	*	175	* Start of command dispatch area.
92	* SockList functions/utilities	176	* The commands here are protocol commands.
93	*
94	**********************************************************************/	177	****************************************************************************/
95		178
96	void	179	// SocketCommand, PlayingCommand, should not exist with those ugly casts
97	SockList_Init (SockList * sl)	180	#define SC(cb) (void )static_cast<void ()(char , int, client )>(cb),
98	{	181	#define PC(cb) (void )static_cast<void ()(char , int, player )>(cb), PF_PLAYER \|
99	sl->len = 0;
100	sl->buf = NULL;
101	}
102		182
103	void	183	/**
104	SockList_AddInt (SockList * sl, uint32 data)	184	* Dispatch table for the server.
105	{
106	sl->buf[sl->len++] = (data >> 24) & 0xff;
107	sl->buf[sl->len++] = (data >> 16) & 0xff;
108	sl->buf[sl->len++] = (data >> 8) & 0xff;
109	sl->buf[sl->len++] = data & 0xff;
110	}
111
112	void
113	SockList_AddInt64 (SockList * sl, uint64 data)
114	{
115	sl->buf[sl->len++] = (char) ((data >> 56) & 0xff);
116	sl->buf[sl->len++] = (char) ((data >> 48) & 0xff);
117	sl->buf[sl->len++] = (char) ((data >> 40) & 0xff);
118	sl->buf[sl->len++] = (char) ((data >> 32) & 0xff);
119
120	sl->buf[sl->len++] = (char) ((data >> 24) & 0xff);
121	sl->buf[sl->len++] = (char) ((data >> 16) & 0xff);
122	sl->buf[sl->len++] = (char) ((data >> 8) & 0xff);
123	sl->buf[sl->len++] = (char) (data & 0xff);
124	}
125
126	/* Basically does the reverse of SockList_AddInt, but on
127	* strings instead. Same for the GetShort, but for 16 bits.
128	*/	185	*/
129	int	186	static struct packet_type packets[] = {
130	GetInt_String (unsigned char *data)	187	{"ncom", PC(NewPlayerCmd) PF_PLAYING },
131	{	188	{"command", PC(PlayerCmd) PF_PLAYING },
132	return ((data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3]);
133	}
134		189
135	short	190	{"examine", PC(ExamineCmd) PF_PLAYING },
136	GetShort_String (unsigned char *data)	191	{"apply", PC(ApplyCmd) PF_PLAYING },
137	{	192	{"reply", PC(ReplyCmd) 0 },
138	return ((data[0] << 8) + data[1]);	193	{"lookat", PC(LookAt) PF_PLAYING },
139	}	194	{"lock", PC(LockItem) PF_PLAYING },
		195	{"mark", PC(MarkItem) PF_PLAYING },
		196	{"move", PC(MoveCmd) PF_PLAYING },
		197	{"ext", PC(ExtCmd) 0 }, /* CF+ */
		198	{"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */
		199	{"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */
140		200
141	/******************************************************************************	201	{"exti", SC(ExtiCmd) 0 }, /* CF+ */
142	*	202	{"addme", SC(AddMeCmd) 0 },
143	* Start of read routines.	203	{"askface", SC(SendFaceCmd) 0 }, /* Added: phil */
144	*	204	{"requestinfo", SC(RequestInfo) 0 },
145	******************************************************************************/	205	{"setfacemode", SC(SetFaceMode) 0 },
		206	{"setsound", SC(SetSound) 0 },
		207	{"setup", SC(SetUp) 0 },
		208	{"version", SC(VersionCmd) 0 },
		209	{"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /Added: tchize /
		210	{"toggleextendedtext", SC(ToggleExtendedText) 0 }, /Added: tchize /
		211	{"asksmooth", SC(AskSmooth) 0 }, /Added: tchize (smoothing technologies) /
		212	};
146		213
147	/**	214	bool
148	* This reads from fd and puts the data in sl. We return true if we think	215	client::may_execute (const packet_type *pkt) const
149	* we have a full packet, 0 if we have a partial packet. The only processing
150	* we do is remove the intial size value. len (As passed) is the size of the
151	* buffer allocated in the socklist. We make the assumption the buffer is
152	* at least 2 bytes long.
153	*/
154
155	int
156	SockList_ReadPacket (int fd, SockList * sl, int len)
157	{	216	{
158	int stat, toread;	217	return (!(pkt->flags & PF_PLAYER) \|\| pl)
		218	&& (!(pkt->flags & PF_PLAYING) \|\| (pl && pl->state == ST_PLAYING));
		219	}
159		220
160	/* Sanity check - shouldn't happen */	221	void
161	if (sl->len < 0)	222	client::execute (const packet_type pkt, char data, int datalen)
162	{	223	{
163	abort ();	224	if (may_execute (pkt))
164	}	225	{
165	/* We already have a partial packet */	226	//TODO: only one format
166	if (sl->len < 2)	227	if (pkt->flags & PF_PLAYER)
		228	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
		229	else
		230	((void ()(char , int, client ))pkt->cb)((char )data, datalen, this);
167	{	231	}
168	#ifdef WIN32 /* **WIN32 SockList_ReadPacket: change read() to recv() /	232	else
		233	send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name);
		234	}
169		235
170	stat = recv (fd, sl->buf + sl->len, 2 - sl->len, 0);	236	bool
		237	client::handle_packet ()
		238	{
		239	int pkt_len = next_packet ();
171		240
172	#else	241	if (!pkt_len)
173	do	242	return false;
		243	else if (pkt_len < 0)
		244	{
		245	LOG (llevError, "read error on player %s\n",
		246	pl && pl->ob ? &pl->ob->name : "[anonymous]");
		247	destroy ();
		248	return false;
		249	}
		250
		251	inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
		252
		253	/* First, break out beginning word. There are at least
		254	* a few commands that do not have any paremeters. If
		255	* we get such a command, don't worry about trying
		256	* to break it up.
		257	*/
		258	int datalen;
		259	char data = strchr ((char )inbuf + 2, ' ');
		260
		261	if (data)
		262	{
		263	*data++ = 0;
		264	datalen = pkt_len - (data - (char *)inbuf);
		265	}
		266	else
		267	{
		268	data = (char *)inbuf + 2; // better read garbage than segfault
		269	datalen = 0;
		270	}
		271
		272	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
		273	if (!strcmp ((char *)inbuf + 2, pkt->name))
174	{	274	{
175	stat = read (fd, sl->buf + sl->len, 2 - sl->len);	275	if (pkt->flags & PF_PLAYER)
		276	queue_command (pkt, data, datalen);
		277	else
		278	execute (pkt, data, datalen);
		279
		280	goto next_packet;
		281	}
		282
		283	// If we get here, we didn't find a valid command.
		284	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
		285	next_packet:
		286	skip_packet (pkt_len);
		287
		288	// input buffer has space again
		289	socket_ev.poll (socket_ev.poll () \| PE_R);
		290
		291	return true;
		292	}
		293
		294	// callback called when socket is either readable or writable
		295	void
		296	client::socket_cb (iow &w, int got)
		297	{
		298	//TODO remove when we have better socket cleanup logic
		299	if (status == Ns_Dead)
		300	{
		301	socket_ev.poll (0);
		302	return;
		303	}
		304
		305	if (got & PE_W)
		306	{
		307	write_outputbuffer ();
		308
		309	if (!outputbuffer.len)
		310	socket_ev.poll (socket_ev.poll () & ~PE_W);
		311	}
		312
		313	if (got & PE_R)
		314	{
		315	//TODO: rate-limit tcp connection in better ways, important
		316
		317	int amount = sizeof (inbuf) - inbuf_len;
		318
		319	if (!amount)
176	}	320	{
177	while ((stat == -1) && (errno == EINTR));	321	// input buffer full
178	#endif	322	socket_ev.poll (socket_ev.poll () & ~PE_R);
179	if (stat < 0)	323	return;
180	{	324	}
181	/* In non blocking mode, EAGAIN is set when there is no	325
182	* data available.	326	amount = read (fd, inbuf + inbuf_len, amount);
183	*/	327
184	#ifdef WIN32 /* **WIN32 SockList_ReadPacket: error handling for win32 /	328	if (!amount)
185	if ((stat == -1) && WSAGetLastError () != WSAEWOULDBLOCK)	329	{
		330	destroy ();
		331	return;
		332	}
		333	else if (amount < 0)
		334	{
		335	if (errno != EAGAIN && errno != EINTR)
186	{	336	{
187	if (WSAGetLastError () == WSAECONNRESET)	337	LOG (llevError, "read error: %s\n", strerror (errno));
188	LOG (llevDebug, "Connection closed by client\n");	338	destroy ();
189	else	339	return;
190	{
191	LOG (llevDebug, "ReadPacket got error %d, returning 0\n", WSAGetLastError ());
192	}
193	return -1; /* kick this user! */
194	}	340	}
195	#else
196	if (errno != EAGAIN && errno != EWOULDBLOCK)
197	{
198	LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno));
199	}
200	#endif
201	return 0; /Error /
202	}
203	if (stat == 0)
204	return -1;
205	sl->len += stat;
206	#ifdef CS_LOGSTATS
207	cst_tot.ibytes += stat;
208	cst_lst.ibytes += stat;
209	#endif
210	if (stat < 2)
211	return 0; /* Still don't have a full packet */
212	}
213	/* Figure out how much more data we need to read. Add 2 from the
214	* end of this - size header information is not included.
215	*/
216	toread = 2 + (sl->buf[0] << 8) + sl->buf[1] - sl->len;
217	if ((toread + sl->len) >= len)
218	{
219	LOG (llevError, "SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", toread + sl->len, len);
220	/* Quick hack in case for 'oldsocketmode' input. If we are
221	* closing the socket anyways, then reading this extra 100 bytes
222	* shouldn't hurt.
223	*/
224	#ifdef WIN32 /* **win32 SockList_ReadPacket: change read() to recv() /
225	recv (fd, sl->buf + 2, 100, 0);
226	#else
227	read (fd, sl->buf + 2, 100);
228	#endif /* end win32 */
229		341
230	/* return error so the socket is closed */	342	// should not be here, normally
231	return -1;
232	}
233	do
234	{
235	#ifdef WIN32 /* **win32 SockList_ReadPacket: change read() to recv() /
236	stat = recv (fd, sl->buf + sl->len, toread, 0);
237	#else
238	do
239	{	343	}
240	stat = read (fd, sl->buf + sl->len, toread);	344	else
241	}	345	{
242	while ((stat < 0) && (errno == EINTR));	346	inbuf_len += amount;
243	#endif	347
244	if (stat < 0)	348	cst_tot.ibytes += amount;
		349	cst_lst.ibytes += amount;
		350
		351	cmd_ev.start ();
245	{	352	}
246
247	#ifdef WIN32 /* **win32 SockList_ReadPacket: change error handling for win32 /
248	if ((stat == -1) && WSAGetLastError () != WSAEWOULDBLOCK)
249	{
250	if (WSAGetLastError () == WSAECONNRESET)
251	LOG (llevDebug, "Connection closed by client\n");
252	else
253	{
254	LOG (llevDebug, "ReadPacket got error %d, returning 0\n", WSAGetLastError ());
255	}
256	return -1; /* kick this user! */
257	}
258	#else
259	if (errno != EAGAIN && errno != EWOULDBLOCK)
260	{
261	LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno));
262	}
263	#endif
264	return 0; /Error /
265	}
266	if (stat == 0)
267	return -1;
268	sl->len += stat;
269	#ifdef CS_LOGSTATS
270	cst_tot.ibytes += stat;
271	cst_lst.ibytes += stat;
272	#endif
273	toread -= stat;
274	if (toread == 0)
275	return 1;
276	if (toread < 0)
277	{
278	LOG (llevError, "SockList_ReadPacket: Read more bytes than desired.\n");
279	return 1;
280	}
281	}	353	}
282	while (toread > 0);	354	}
283	return 0;	355
		356	// called whenever we have additional commands to process
		357	void
		358	client::cmd_cb (iw &w)
		359	{
		360	if (handle_packet ())
		361	w.start ();
		362	else
		363	flush ();
284	}	364	}
285		365
286	/*******************************************************************************	366	/*******************************************************************************
287	*	367	*
288	* Start of write related routines.	368	* Start of write related routines.
…		…
293	* Adds data to a socket buffer for whatever reason.	373	* Adds data to a socket buffer for whatever reason.
294	*	374	*
295	* ns is the socket we are adding the data to, buf is the start of the	375	* ns is the socket we are adding the data to, buf is the start of the
296	* data, and len is the number of bytes to add.	376	* data, and len is the number of bytes to add.
297	*/	377	*/
298		378	void
299	static void	379	client::send (void *buf_, int len)
300	add_to_buffer (NewSocket * ns, char *buf, int len)
301	{	380	{
		381	char buf = (char )buf_;
		382	char *pos = buf;
		383	int amt = 0;
		384
		385	if (status == Ns_Dead \|\| !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	destroy ();
		392	return;
		393	}
		394
302	int avail, end;	395	int avail, end;
303
304	if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE)
305	{
306	LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd);
307	ns->status = Ns_Dead;
308	return;
309	}
310		396
311	/* data + end is where we start putting the new data. The last byte	397	/* data + end is where we start putting the new data. The last byte
312	* currently in use is actually data + end -1	398	* currently in use is actually data + end -1
313	*/	399	*/
314
315	end = ns->outputbuffer.start + ns->outputbuffer.len;	400	end = outputbuffer.start + outputbuffer.len;
316	/* The buffer is already in a wrapped state, so adjust end */	401	/* The buffer is already in a wrapped state, so adjust end */
317	if (end >= SOCKETBUFSIZE)	402	if (end >= SOCKETBUFSIZE)
318	end -= SOCKETBUFSIZE;	403	end -= SOCKETBUFSIZE;
		404
319	avail = SOCKETBUFSIZE - end;	405	avail = SOCKETBUFSIZE - end;
320		406
321	/* We can all fit it behind the current data without wrapping */	407	/* We can all fit it behind the current data without wrapping */
322	if (avail >= len)	408	if (avail >= len)
323	{
324	memcpy (ns->outputbuffer.data + end, buf, len);	409	memcpy (outputbuffer.data + end, buf, len);
325	}
326	else	410	else
327	{	411	{
328	memcpy (ns->outputbuffer.data + end, buf, avail);	412	memcpy (outputbuffer.data + end, buf, avail);
329	memcpy (ns->outputbuffer.data, buf + avail, len - avail);	413	memcpy (outputbuffer.data, buf + avail, len - avail);
330	}	414	}
		415
331	ns->outputbuffer.len += len;	416	outputbuffer.len += len;
332	#if 0
333	LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start);
334	#endif
335	}	417	}
336
337	/**
338	* Writes data to socket.
339	*
340	* When the socket is clear to write, and we have backlogged data, this
341	* is called to write it out.
342	*/
343	void
344	write_socket_buffer (NewSocket * ns)
345	{
346	int amt, max;
347
348	if (ns->outputbuffer.len == 0)
349	{
350	LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd);
351	return;
352	}
353
354	do
355	{
356	max = SOCKETBUFSIZE - ns->outputbuffer.start;
357	if (ns->outputbuffer.len < max)
358	max = ns->outputbuffer.len;
359
360	#ifdef WIN32 /* **win32 write_socket_buffer: change write() to send() /
361	amt = send (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max, 0);
362	#else
363	do
364	{
365	amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max);
366	}
367	while ((amt < 0) && (errno == EINTR));
368	#endif
369
370	if (amt < 0)
371	{ /* We got an error */
372
373	#ifdef WIN32 /* **win32 write_socket_buffer: change error handling /
374	if (amt == -1 && WSAGetLastError () != WSAEWOULDBLOCK)
375	{
376	LOG (llevError, "New socket write failed (wsb) (%d).\n", WSAGetLastError ());
377	#else
378	if (errno != EWOULDBLOCK)
379	{
380	LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno));
381	#endif
382	ns->status = Ns_Dead;
383	return;
384	}
385	else
386	{ /* EWOULDBLOCK */
387	/* can't write it, so store it away. */
388	ns->can_write = 0;
389	return;
390	}
391	}
392	ns->outputbuffer.start += amt;
393	/* wrap back to start of buffer */
394	if (ns->outputbuffer.start == SOCKETBUFSIZE)
395	ns->outputbuffer.start = 0;
396	ns->outputbuffer.len -= amt;
397	#ifdef CS_LOGSTATS
398	cst_tot.obytes += amt;
399	cst_lst.obytes += amt;
400	#endif
401	}
402	while (ns->outputbuffer.len > 0);
403	}
404
405	/**
406	* This writes data to the socket. - It is very low level -
407	* all we try and do is write out the data to the socket
408	* provided (ns). buf is the data to write, len is the number
409	* of bytes to write. IT doesn't return anything - rather, it
410	* updates the ns structure if we get an error.
411	*/
412	void
413	Write_To_Socket (NewSocket * ns, char *buf, int len)
414	{
415	int amt = 0;
416	char *pos = buf;
417
418	if (ns->status == Ns_Dead \|\| !buf)
419	{
420	LOG (llevDebug, "Write_To_Socket called with dead socket\n");
421	return;
422	}
423
424	#ifndef __GNU__ /* This caused problems on Hurd */
425	if (!ns->can_write)
426	{
427	add_to_buffer (ns, buf, len);
428	return;
429	}
430	#endif
431	/* If we manage to write more than we wanted, take it as a bonus */
432	while (len > 0)
433	{
434
435	#ifdef WIN32 /* **win32 Write_To_Socket: change write() to send() /
436	amt = send (ns->fd, pos, len, 0);
437	#else
438	do
439	{
440	amt = write (ns->fd, pos, len);
441	}
442	while ((amt < 0) && (errno == EINTR));
443	#endif
444
445	if (amt < 0)
446	{ /* We got an error */
447	#ifdef WIN32 /* **win32 Write_To_Socket: change error handling /
448	if (amt == -1 && WSAGetLastError () != WSAEWOULDBLOCK)
449	{
450	LOG (llevError, "New socket write failed WTS (%d).\n", WSAGetLastError ());
451	#else
452	if (errno != EWOULDBLOCK)
453	{
454	LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */
455	errno, strerror (errno));
456	#endif
457	ns->status = Ns_Dead;
458	return;
459	}
460	else
461	{ /* EWOULDBLOCK */
462	/* can't write it, so store it away. */
463	add_to_buffer (ns, pos, len);
464	ns->can_write = 0;
465	return;
466	}
467	}
468	/* amt gets set to 0 above in blocking code, so we do this as
469	* an else if to make sure we don't reprocess it.
470	*/
471	else if (amt == 0)
472	{
473	LOG (llevError, "Write_To_Socket: No data written out.\n");
474	}
475	len -= amt;
476	pos += amt;
477	#ifdef CS_LOGSTATS
478	cst_tot.obytes += amt;
479	cst_lst.obytes += amt;
480	#endif
481	}
482	}
483
484		418
485	/**	419	/**
486	* Takes a string of data, and writes it out to the socket. A very handy	420	* Takes a string of data, and writes it out to the socket. A very handy
487	* shortcut function.	421	* shortcut function.
488	*/	422	*/
489	void	423	void
490	cs_write_string (NewSocket * ns, const char *buf, int len)	424	client::send_packet (packet &sl)
491	{	425	{
492	SockList sl;
493
494	sl.len = len;
495	sl.buf = (unsigned char *) buf;
496	Send_With_Handling (ns, &sl);
497	}
498
499
500	/**
501	* Calls Write_To_Socket to send data to the client.
502	*
503	* The only difference in this function is that we take a SockList
504	*, and we prepend the length information.
505	*/
506	void
507	Send_With_Handling (NewSocket * ns, SockList * msg)
508	{
509	unsigned char sbuf[4];
510
511	if (ns->status == Ns_Dead \|\| !msg)	426	if (status == Ns_Dead)
512	return;	427	return;
513		428
514	if (msg->len >= MAXSOCKBUF)	429	if (sl.length () >= MAXSOCKBUF)
515	{	430	{
516	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len);	431	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
517	/* Almost certainly we've overflowed a buffer, so quite now to make	432	/* Almost certainly we've overflowed a buffer, so quit now to make
518	* it easier to debug.	433	* it easier to debug.
519	*/	434	*/
520	abort ();	435	abort ();
521	}	436	}
522	sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF;
523	sbuf[1] = ((uint32) (msg->len)) & 0xFF;
524	if (ns->status != Ns_Old)
525	Write_To_Socket (ns, (char *) sbuf, 2);
526	Write_To_Socket (ns, (char *) msg->buf, msg->len);
527	}
528		437
529	/**	438	if (!sl.length ())
530	* Takes a string of data, and writes it out to the socket. A very handy	439	return;
531	* shortcut function.	440
		441	assert (sl.hdrlen == 2);
		442
		443	sl.buf_ [0] = sl.length () >> 8;
		444	sl.buf_ [1] = sl.length () ;
		445
		446	send (sl.buf_, sl.length () + sl.hdrlen);
		447	}
		448
		449	void
		450	client::send_packet (const char *buf, int len)
		451	{
		452	packet sl;
		453
		454	sl << data (buf, len);
		455	send_packet (sl);
		456	}
		457
		458	void
		459	client::send_packet (const char *buf)
		460	{
		461	send_packet (buf, strlen (buf));
		462	}
		463
		464	void
		465	client::send_packet_printf (const char *format, ...)
		466	{
		467	packet sl;
		468
		469	va_list ap;
		470	va_start (ap, format);
		471	sl.vprintf (format, ap);
		472	va_end (ap);
		473
		474	send_packet (sl);
		475	}
		476
		477	/***********************************************************************
532	*/	478	*
533	void	479	* packet functions/utilities
534	Write_String_To_Socket (NewSocket * ns, char *buf, int len)	480	*
535	{	481	**********************************************************************/
536	SockList sl;
537		482
538	sl.len = len;	483	packet &packet::operator <<(const data &v)
539	sl.buf = (unsigned char *) buf;	484	{
540	Send_With_Handling (ns, &sl);	485	if (room () < v.len)
541	}	486	reset ();
		487	else
		488	{
		489	if (v.len)
		490	{
		491	memcpy (cur, v.ptr, v.len);
		492	cur += v.len;
		493	}
		494	}
542		495
		496	return *this;
		497	}
		498
		499	packet &packet::operator <<(const data8 &v)
		500	{
		501	unsigned int len = min (v.len, 0x00FF);
		502	return *this << uint8 (len) << data (v.ptr, len);
		503	}
		504
		505	packet &packet::operator <<(const data16 &v)
		506	{
		507	unsigned int len = min (v.len, 0xFFFF);
		508	return *this << uint16 (len) << data (v.ptr, len);
		509	}
		510
		511	packet &packet::operator <<(const char *v)
		512	{
		513	return *this << data (v, strlen (v ? v : 0));
		514	}
		515
		516	void
		517	packet::vprintf (const char *format, va_list ap)
		518	{
		519	int size = room ();
		520
		521	int len = vsnprintf ((char *)cur, size, format, ap);
		522
		523	if (len >= size)
		524	return reset ();
		525
		526	cur += len;
		527	}
543		528
544	/******************************************************************************	529	/******************************************************************************
545	*	530	*
546	* statistics logging functions.	531	* statistics logging functions.
547	*	532	*
…		…
570	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",	555	LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
571	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,	556	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
572	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);	557	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
573	cst_lst.ibytes = 0;	558	cst_lst.ibytes = 0;
574	cst_lst.obytes = 0;	559	cst_lst.obytes = 0;
575	cst_lst.max_conn = socket_info.nconns;
576	cst_lst.time_start = now;	560	cst_lst.time_start = now;
577	}	561	}
578	#endif	562	#endif
		563

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.5 by root, Sun Sep 10 13:43:33 2006 UTC vs. Revision 1.26 by root, Tue Dec 19 04:58:05 2006 UTC

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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.5 by root, Sun Sep 10 13:43:33 2006 UTC vs.
Revision 1.26 by root, Tue Dec 19 04:58:05 2006 UTC