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

Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.1 by elmex, Sun Aug 13 17:16:06 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 1.1 2006/08/13 17:16:06 elmex 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 Socket_Flush (NewSocket *ns)	53	void
		54	client::flush ()
61	{	55	{
62	#ifdef __linux__	56	#ifdef __linux__
63	// check time of last ack, and, if too old, kill connection	57	// check time of last ack, and, if too old, kill connection
64	struct tcp_info tcpi;	58	struct tcp_info tcpi;
65	socklen_t len = sizeof (tcpi);	59	socklen_t len = sizeof (tcpi);
66		60
67	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))
68	{	62	{
69	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;
70		64
71	if (tcpi.tcpi_unacked	65	rtt = tcpi.tcpi_rtt;
		66	rttvar = tcpi.tcpi_rttvar;
		67
72	&& 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	val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
83	val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
84	#endif	76	#endif
85	}
86		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
87	/***********************************************************************	174	/*****************************************************************************
88	*	175	* Start of command dispatch area.
89	* SockList functions/utilities	176	* The commands here are protocol commands.
90	*
91	**********************************************************************/	177	****************************************************************************/
92		178
93	void SockList_Init(SockList *sl)	179	// SocketCommand, PlayingCommand, should not exist with those ugly casts
94	{	180	#define SC(cb) (void )static_cast<void ()(char , int, client )>(cb),
95	sl->len=0;	181	#define PC(cb) (void )static_cast<void ()(char , int, player )>(cb), PF_PLAYER \|
96	sl->buf=NULL;
97	}
98		182
99	void SockList_AddChar(SockList *sl, char c)	183	/**
100	{	184	* Dispatch table for the server.
101	sl->buf[sl->len]=c;
102	sl->len++;
103	}
104
105	void SockList_AddShort(SockList *sl, uint16 data)
106	{
107	sl->buf[sl->len++]= (data>>8)&0xff;
108	sl->buf[sl->len++] = data & 0xff;
109	}
110
111
112	void SockList_AddInt(SockList *sl, uint32 data)
113	{
114	sl->buf[sl->len++]= (data>>24)&0xff;
115	sl->buf[sl->len++]= (data>>16)&0xff;
116	sl->buf[sl->len++]= (data>>8)&0xff;
117	sl->buf[sl->len++] = data & 0xff;
118	}
119
120	void SockList_AddInt64(SockList *sl, uint64 data)
121	{
122	sl->buf[sl->len++]= ( char )( (data>>56)&0xff );
123	sl->buf[sl->len++]= ( char )( (data>>48)&0xff );
124	sl->buf[sl->len++]= ( char )( (data>>40)&0xff );
125	sl->buf[sl->len++]= ( char )( (data>>32)&0xff );
126
127	sl->buf[sl->len++]= ( char )( (data>>24)&0xff );
128	sl->buf[sl->len++]= ( char )( (data>>16)&0xff );
129	sl->buf[sl->len++]= ( char )( (data>>8)&0xff );
130	sl->buf[sl->len++] =( char )( data & 0xff );
131	}
132
133	/* Basically does the reverse of SockList_AddInt, but on
134	* strings instead. Same for the GetShort, but for 16 bits.
135	*/	185	*/
136	int GetInt_String(unsigned char *data)	186	static struct packet_type packets[] = {
137	{	187	{"ncom", PC(NewPlayerCmd) PF_PLAYING },
138	return ((data[0]<<24) + (data[1]<<16) + (data[2]<<8) + data[3]);	188	{"command", PC(PlayerCmd) PF_PLAYING },
139	}
140		189
141	short GetShort_String(unsigned char *data) {	190	{"examine", PC(ExamineCmd) PF_PLAYING },
142	return ((data[0]<<8)+data[1]);	191	{"apply", PC(ApplyCmd) PF_PLAYING },
143	}	192	{"reply", PC(ReplyCmd) 0 },
		193	{"lookat", PC(LookAt) PF_PLAYING },
		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+ */
144		200
145	/******************************************************************************	201	{"exti", SC(ExtiCmd) 0 }, /* CF+ */
146	*	202	{"addme", SC(AddMeCmd) 0 },
147	* Start of read routines.	203	{"askface", SC(SendFaceCmd) 0 }, /* Added: phil */
148	*	204	{"requestinfo", SC(RequestInfo) 0 },
149	******************************************************************************/	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	};
150		213
151	/**	214	bool
152	* 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
153	* we have a full packet, 0 if we have a partial packet. The only processing
154	* we do is remove the intial size value. len (As passed) is the size of the
155	* buffer allocated in the socklist. We make the assumption the buffer is
156	* at least 2 bytes long.
157	*/
158
159	int SockList_ReadPacket(int fd, SockList *sl, int len)
160	{	216	{
161	int stat,toread;	217	return (!(pkt->flags & PF_PLAYER) \|\| pl)
		218	&& (!(pkt->flags & PF_PLAYING) \|\| (pl && pl->state == ST_PLAYING));
		219	}
162		220
163	/* Sanity check - shouldn't happen */	221	void
164	if (sl->len < 0) {	222	client::execute (const packet_type pkt, char data, int datalen)
165	abort();	223	{
		224	if (may_execute (pkt))
166	}	225	{
167	/* We already have a partial packet */	226	//TODO: only one format
168	if (sl->len<2) {	227	if (pkt->flags & PF_PLAYER)
169	#ifdef WIN32 /* **WIN32 SockList_ReadPacket: change read() to recv() /	228	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
170		229	else
171	stat=recv(fd, sl->buf + sl->len, 2-sl->len,0);	230	((void ()(char , int, client ))pkt->cb)((char )data, datalen, this);
172
173	#else
174	do {
175	stat=read(fd, sl->buf + sl->len, 2-sl->len);
176	} while ((stat==-1) && (errno==EINTR));
177	#endif
178	if (stat<0) {
179	/* In non blocking mode, EAGAIN is set when there is no
180	* data available.
181	*/
182	#ifdef WIN32 /* **WIN32 SockList_ReadPacket: error handling for win32 /
183	if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) {
184	if(WSAGetLastError() == WSAECONNRESET)
185	LOG(llevDebug,"Connection closed by client\n");
186	else
187	{
188	LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError());
189	}
190	return -1; /* kick this user! */
191	}	231	}
192	#else	232	else
193	if (errno != EAGAIN && errno !=EWOULDBLOCK) {	233	send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name);
194	LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno));	234	}
		235
		236	bool
		237	client::handle_packet ()
		238	{
		239	int pkt_len = next_packet ();
		240
		241	if (!pkt_len)
		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;
195	}	249	}
196	#endif	250
197	return 0; /Error /	251	inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
198	}	252
199	if (stat==0) return -1;	253	/* First, break out beginning word. There are at least
200	sl->len += stat;	254	* a few commands that do not have any paremeters. If
201	#ifdef CS_LOGSTATS	255	* we get such a command, don't worry about trying
202	cst_tot.ibytes += stat;	256	* to break it up.
203	cst_lst.ibytes += stat;
204	#endif
205	if (stat<2) return 0; /* Still don't have a full packet */
206	}
207	/* Figure out how much more data we need to read. Add 2 from the
208	* end of this - size header information is not included.
209	*/	257	*/
210	toread = 2+(sl->buf[0] << 8) + sl->buf[1] - sl->len;	258	int datalen;
211	if ((toread + sl->len) >= len) {	259	char data = strchr ((char )inbuf + 2, ' ');
212	LOG(llevError,"SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n",
213	toread + sl->len, len);
214	/* Quick hack in case for 'oldsocketmode' input. If we are
215	* closing the socket anyways, then reading this extra 100 bytes
216	* shouldn't hurt.
217	*/
218	#ifdef WIN32 /* **win32 SockList_ReadPacket: change read() to recv() /
219	recv(fd, sl->buf+2, 100, 0);
220	#else
221	read(fd, sl->buf+2, 100);
222	#endif /* end win32 */
223		260
224	/* return error so the socket is closed */	261	if (data)
225	return -1;
226	}	262	{
227	do {	263	*data++ = 0;
228	#ifdef WIN32 /* **win32 SockList_ReadPacket: change read() to recv() /	264	datalen = pkt_len - (data - (char *)inbuf);
229	stat = recv(fd, sl->buf+ sl->len, toread, 0);
230	#else
231	do {
232	stat = read(fd, sl->buf+ sl->len, toread);
233	} while ((stat<0) && (errno==EINTR));
234	#endif
235	if (stat<0) {
236
237	#ifdef WIN32 /* **win32 SockList_ReadPacket: change error handling for win32 /
238	if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) {
239	if(WSAGetLastError() == WSAECONNRESET)
240	LOG(llevDebug,"Connection closed by client\n");
241	else
242	{
243	LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError());
244	}
245	return -1; /* kick this user! */
246	}	265	}
247	#else	266	else
248	if (errno != EAGAIN && errno !=EWOULDBLOCK) {	267	{
249	LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno));	268	data = (char *)inbuf + 2; // better read garbage than segfault
		269	datalen = 0;
250	}	270	}
251	#endif	271
252	return 0; /Error /	272	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
253	}	273	if (!strcmp ((char *)inbuf + 2, pkt->name))
254	if (stat==0) return -1;	274	{
255	sl->len += stat;	275	if (pkt->flags & PF_PLAYER)
256	#ifdef CS_LOGSTATS	276	queue_command (pkt, data, datalen);
257	cst_tot.ibytes += stat;	277	else
258	cst_lst.ibytes += stat;	278	execute (pkt, data, datalen);
259	#endif	279
260	toread -= stat;	280	goto next_packet;
261	if (toread==0) return 1;	281	}
262	if (toread < 0) {	282
263	LOG(llevError,"SockList_ReadPacket: Read more bytes than desired.\n");	283	// If we get here, we didn't find a valid command.
264	return 1;	284	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
265	}	285	next_packet:
266	} while (toread>0);	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);
267	return 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)
		320	{
		321	// input buffer full
		322	socket_ev.poll (socket_ev.poll () & ~PE_R);
		323	return;
		324	}
		325
		326	amount = read (fd, inbuf + inbuf_len, amount);
		327
		328	if (!amount)
		329	{
		330	destroy ();
		331	return;
		332	}
		333	else if (amount < 0)
		334	{
		335	if (errno != EAGAIN && errno != EINTR)
		336	{
		337	LOG (llevError, "read error: %s\n", strerror (errno));
		338	destroy ();
		339	return;
		340	}
		341
		342	// should not be here, normally
		343	}
		344	else
		345	{
		346	inbuf_len += amount;
		347
		348	cst_tot.ibytes += amount;
		349	cst_lst.ibytes += amount;
		350
		351	cmd_ev.start ();
		352	}
		353	}
		354	}
		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 ();
268	}	364	}
269		365
270	/*******************************************************************************	366	/*******************************************************************************
271	*	367	*
272	* Start of write related routines.	368	* Start of write related routines.
…		…
277	* Adds data to a socket buffer for whatever reason.	373	* Adds data to a socket buffer for whatever reason.
278	*	374	*
279	* 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
280	* data, and len is the number of bytes to add.	376	* data, and len is the number of bytes to add.
281	*/	377	*/
282		378	void
283	static void add_to_buffer(NewSocket ns, char buf, int len)	379	client::send (void *buf_, int len)
284	{	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
285	int avail, end;	395	int avail, end;
286		396
287	if ((len+ns->outputbuffer.len)>SOCKETBUFSIZE) {
288	LOG(llevDebug,"Socket on fd %d has overrun internal buffer - marking as dead\n",
289	ns->fd);
290	ns->status = Ns_Dead;
291	return;
292	}
293
294	/* 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
295	* currently in use is actually data + end -1	398	* currently in use is actually data + end -1
296	*/	399	*/
297
298	end=ns->outputbuffer.start + ns->outputbuffer.len;	400	end = outputbuffer.start + outputbuffer.len;
299	/* The buffer is already in a wrapped state, so adjust end */	401	/* The buffer is already in a wrapped state, so adjust end */
300	if (end>=SOCKETBUFSIZE) end-=SOCKETBUFSIZE;	402	if (end >= SOCKETBUFSIZE)
		403	end -= SOCKETBUFSIZE;
		404
301	avail=SOCKETBUFSIZE - end;	405	avail = SOCKETBUFSIZE - end;
302		406
303	/* We can all fit it behind the current data without wrapping */	407	/* We can all fit it behind the current data without wrapping */
304	if (avail >=len ) {	408	if (avail >= len)
305	memcpy(ns->outputbuffer.data + end, buf, len);	409	memcpy (outputbuffer.data + end, buf, len);
		410	else
306	}	411	{
307	else {
308	memcpy(ns->outputbuffer.data + end, buf, avail);	412	memcpy (outputbuffer.data + end, buf, avail);
309	memcpy(ns->outputbuffer.data, buf+avail, len-avail);	413	memcpy (outputbuffer.data, buf + avail, len - avail);
310	}
311	ns->outputbuffer.len += len;
312	#if 0
313	LOG(llevDebug,"Added %d to output buffer, total length now %d, start=%d\n", len,
314	ns->outputbuffer.len, ns->outputbuffer.start);
315	#endif
316	}
317
318	/**
319	* Writes data to socket.
320	*
321	* When the socket is clear to write, and we have backlogged data, this
322	* is called to write it out.
323	*/
324	void write_socket_buffer(NewSocket *ns)
325	{
326	int amt, max;
327
328	if (ns->outputbuffer.len==0) {
329	LOG(llevDebug,"write_socket_buffer called when there is no data, fd=%d\n",
330	ns->fd);
331	return;
332	}
333
334	do {
335	max = SOCKETBUFSIZE - ns->outputbuffer.start;
336	if (ns->outputbuffer.len<max) max = ns->outputbuffer.len;
337
338	#ifdef WIN32 /* **win32 write_socket_buffer: change write() to send() /
339	amt=send(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max,0);
340	#else
341	do {
342	amt=write(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max);
343	} while ((amt<0) && (errno==EINTR));
344	#endif
345
346	if (amt < 0) { /* We got an error */
347
348	#ifdef WIN32 /* **win32 write_socket_buffer: change error handling /
349	if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) {
350	LOG(llevError,"New socket write failed (wsb) (%d).\n", WSAGetLastError());
351	#else
352	if (errno !=EWOULDBLOCK) {
353	LOG(llevError,"New socket write failed (wsb) (%d: %s).\n",
354	errno, strerror_local(errno));
355	#endif
356	ns->status=Ns_Dead;
357	return;
358	}	414	}
359	else { /* EWOULDBLOCK */
360	/* can't write it, so store it away. */
361	ns->can_write=0;
362	return;
363	}
364	}
365	ns->outputbuffer.start += amt;
366	/* wrap back to start of buffer */
367	if (ns->outputbuffer.start==SOCKETBUFSIZE) ns->outputbuffer.start=0;
368	ns->outputbuffer.len -= amt;
369	#ifdef CS_LOGSTATS
370	cst_tot.obytes += amt;
371	cst_lst.obytes += amt;
372	#endif
373	} while (ns->outputbuffer.len>0);
374	}
375		415
376	/**	416	outputbuffer.len += len;
377	* This writes data to the socket. - It is very low level -
378	* all we try and do is write out the data to the socket
379	* provided (ns). buf is the data to write, len is the number
380	* of bytes to write. IT doesn't return anything - rather, it
381	* updates the ns structure if we get an error.
382	*/
383	void Write_To_Socket(NewSocket ns, char buf, int len)
384	{
385	int amt=0;
386	char *pos=buf;
387
388	if (ns->status == Ns_Dead \|\| !buf) {
389	LOG(llevDebug,"Write_To_Socket called with dead socket\n");
390	return;
391	}
392
393	#ifndef __GNU__ /* This caused problems on Hurd */
394	if (!ns->can_write) {
395	add_to_buffer(ns, buf, len);
396	return;
397	}
398	#endif
399	/* If we manage to write more than we wanted, take it as a bonus */
400	while (len>0) {
401
402	#ifdef WIN32 /* **win32 Write_To_Socket: change write() to send() /
403	amt=send(ns->fd, pos, len,0);
404	#else
405	do {
406	amt=write(ns->fd, pos, len);
407	} while ((amt<0) && (errno==EINTR));
408	#endif
409
410	if (amt < 0) { /* We got an error */
411	#ifdef WIN32 /* **win32 Write_To_Socket: change error handling /
412	if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) {
413	LOG(llevError,"New socket write failed WTS (%d).\n",WSAGetLastError());
414	#else
415	if (errno !=EWOULDBLOCK) {
416	LOG(llevError,"New socket write failed WTS (%d: %s).\n", /* ---WIN32 */
417	errno, strerror_local(errno));
418	#endif
419	ns->status=Ns_Dead;
420	return;
421	}
422	else { /* EWOULDBLOCK */
423	/* can't write it, so store it away. */
424	add_to_buffer(ns, pos, len);
425	ns->can_write=0;
426	return;
427	}
428	}
429	/* amt gets set to 0 above in blocking code, so we do this as
430	* an else if to make sure we don't reprocess it.
431	*/
432	else if (amt==0) {
433	LOG(llevError,"Write_To_Socket: No data written out.\n");
434	}
435	len -= amt;
436	pos += amt;
437	#ifdef CS_LOGSTATS
438	cst_tot.obytes += amt;
439	cst_lst.obytes += amt;
440	#endif
441	}
442	}	417	}
443
444		418
445	/**	419	/**
446	* 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
447	* shortcut function.	421	* shortcut function.
448	*/	422	*/
449	void cs_write_string(NewSocket ns, const char buf, int len)	423	void
		424	client::send_packet (packet &sl)
450	{	425	{
451	SockList sl;
452
453	sl.len = len;
454	sl.buf = (unsigned char*)buf;
455	Send_With_Handling(ns, &sl);
456	}
457
458
459	/**
460	* Calls Write_To_Socket to send data to the client.
461	*
462	* The only difference in this function is that we take a SockList
463	*, and we prepend the length information.
464	*/
465	void Send_With_Handling(NewSocket ns,SockList msg)
466	{
467	unsigned char sbuf[4];
468
469	if (ns->status == Ns_Dead \|\| !msg)	426	if (status == Ns_Dead)
470	return;	427	return;
471		428
472	if (msg->len >= MAXSOCKBUF) {	429	if (sl.length () >= MAXSOCKBUF)
		430	{
473	LOG(llevError,"Trying to send a buffer beyond properly size, len =%d\n",	431	LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
474	msg->len);
475	/* 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
476	* it easier to debug.	433	* it easier to debug.
477	*/	434	*/
478	abort();	435	abort ();
479	}	436	}
480	sbuf[0] = ((uint32)(msg->len) >> 8) & 0xFF;
481	sbuf[1] = ((uint32)(msg->len)) & 0xFF;
482	if (ns->status != Ns_Old)
483	Write_To_Socket(ns, (char *) sbuf, 2);
484	Write_To_Socket(ns, (char*)msg->buf, msg->len);
485	}
486		437
487	/**	438	if (!sl.length ())
488	* Takes a string of data, and writes it out to the socket. A very handy	439	return;
489	* 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	/***********************************************************************
490	*/	478	*
491	void Write_String_To_Socket(NewSocket ns, char buf, int len)	479	* packet functions/utilities
492	{	480	*
493	SockList sl;	481	**********************************************************************/
494		482
495	sl.len = len;	483	packet &packet::operator <<(const data &v)
496	sl.buf = (unsigned char*) buf;	484	{
497	Send_With_Handling(ns, &sl);	485	if (room () < v.len)
498	}	486	reset ();
		487	else
		488	{
		489	if (v.len)
		490	{
		491	memcpy (cur, v.ptr, v.len);
		492	cur += v.len;
		493	}
		494	}
499		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	}
500		528
501	/******************************************************************************	529	/******************************************************************************
502	*	530	*
503	* statistics logging functions.	531	* statistics logging functions.
504	*	532	*
505	******************************************************************************/	533	******************************************************************************/
506		534
507	#ifdef CS_LOGSTATS	535	#ifdef CS_LOGSTATS
		536
508	/* cst_tot is for the life of the server, cst_last is for the last series of	537	/* cst_tot is for the life of the server, cst_last is for the last series of
509	* stats	538	* stats
510	*/	539	*/
511	CS_Stats cst_tot, cst_lst;	540	CS_Stats cst_tot, cst_lst;
512		541
513	/**	542	/**
514	* Writes out the gathered stats. We clear cst_lst.	543	* Writes out the gathered stats. We clear cst_lst.
515	*/	544	*/
		545	void
516	void write_cs_stats(void)	546	write_cs_stats (void)
517	{	547	{
518	time_t now=time(NULL);	548	time_t now = time (NULL);
519		549
520	/* If no connections recently, don't both to log anything */	550	/* If no connections recently, don't both to log anything */
521	if (cst_lst.ibytes==0 && cst_lst.obytes==0) return;	551	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
		552	return;
522		553
523	/* CSSTAT is put in so scripts can easily find the line */	554	/* CSSTAT is put in so scripts can easily find the line */
524	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",
525	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,
526	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes,	557	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
527	cst_lst.max_conn, now - cst_lst.time_start);
528	cst_lst.ibytes=0;	558	cst_lst.ibytes = 0;
529	cst_lst.obytes=0;	559	cst_lst.obytes = 0;
530	cst_lst.max_conn=socket_info.nconns;
531	cst_lst.time_start=now;	560	cst_lst.time_start = now;
532	}	561	}
533	#endif	562	#endif
		563

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Comparing deliantra/server/socket/lowlevel.C (file contents): Revision 1.1 by elmex, Sun Aug 13 17:16:06 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 1.1 by elmex, Sun Aug 13 17:16:06 2006 UTC vs.
Revision 1.26 by root, Tue Dec 19 04:58:05 2006 UTC