[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 1.25 by root, Sun Dec 17 19:14:00 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...	45	# define TCP_HZ 1000 // sorry...
52	# include <netinet/tcp.h>	46	# include <netinet/tcp.h>
53	#endif	47	#endif
54		48
55	// use a really low timeout, as it doesn't cost any bandwidth, and you can	49	// use a really low timeout, as it doesn't cost any bandwidth, and you can
56	// easily die in 20 seconds...	50	// easily die in 20 seconds...
57	#define SOCKET_TIMEOUT1 10	51	#define SOCKET_TIMEOUT1 10
58	#define SOCKET_TIMEOUT2 20	52	#define SOCKET_TIMEOUT2 20
59		53
60	void Socket_Flush (NewSocket *ns)	54	void
		55	client::flush ()
61	{	56	{
62	#ifdef __linux__	57	#ifdef __linux__
63	// check time of last ack, and, if too old, kill connection	58	// check time of last ack, and, if too old, kill connection
64	struct tcp_info tcpi;	59	struct tcp_info tcpi;
65	socklen_t len = sizeof (tcpi);	60	socklen_t len = sizeof (tcpi);
66		61
67	if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))	62	if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
68	{	63	{
69	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;	64	unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
70		65
71	if (tcpi.tcpi_unacked	66	rtt = tcpi.tcpi_rtt;
		67	rttvar = tcpi.tcpi_rttvar;
		68
72	&& SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s	69	if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s
73	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s	70	&& SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s
74	{	71	{
75	LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd,	72	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);	73	(unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
77	ns->status = Ns_Dead;	74	destroy ();
78	}	75	}
79	}	76	}
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	77	#endif
85	}
86		78
		79	/**
		80	* Writes data to socket.
		81	*
		82	* When the socket is clear to write, and we have backlogged data, this
		83	* is called to write it out.
		84	*/
		85
		86	if (!outputbuffer.len \|\| socket_ev.poll () & PE_W)
		87	return;
		88
		89	write_outputbuffer ();
		90	}
		91
		92	void
		93	client::write_outputbuffer ()
		94	{
		95	while (outputbuffer.len)
		96	{
		97	int res = write (fd, outputbuffer.data + outputbuffer.start,
		98	min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
		99
		100	if (res > 0)
		101	{
		102	outputbuffer.start += res;
		103	/* wrap back to start of buffer */
		104	if (outputbuffer.start == SOCKETBUFSIZE)
		105	outputbuffer.start = 0;
		106
		107	outputbuffer.len -= res;
		108	#ifdef CS_LOGSTATS
		109	cst_tot.obytes += res;
		110	cst_lst.obytes += res;
		111	#endif
		112	}
		113	else if (res == 0)
		114	{
		115	LOG (llevError, "socket write failed, connection closed.\n");
		116	destroy ();
		117	return;
		118	}
		119	else if (errno == EINTR)
		120	{
		121	// just retry
		122	}
		123	else if (errno == EAGAIN)
		124	{
		125	// delay till ready
		126	socket_ev.poll (socket_ev.poll () \| PE_W);
		127	socket_ev.start ();
		128	return;
		129	}
		130	else
		131	{
		132	LOG (llevError, "socket write failed: %s\n", strerror (errno));
		133	destroy ();
		134	return;
		135	}
		136	}
		137
		138	socket_ev.poll (socket_ev.poll () & ~PE_W);
		139	}
		140
		141	/******************************************************************************
		142	*
		143	* Start of read routines.
		144	*
		145	******************************************************************************/
		146
		147	int
		148	client::next_packet ()
		149	{
		150	if (inbuf_len >= 2)
		151	{
		152	int pkt_len = (inbuf [0] << 8) \| inbuf [1];
		153
		154	if (inbuf_len >= 2 + pkt_len)
		155	return 2 + pkt_len;
		156
		157	if (inbuf_len == sizeof (inbuf))
		158	{
		159	send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED);
		160	destroy ();
		161	return -1;
		162	}
		163	}
		164
		165	return 0;
		166	}
		167
		168	void
		169	client::skip_packet (int len)
		170	{
		171	inbuf_len -= len;
		172	memmove (inbuf, inbuf + len, inbuf_len);
		173	}
		174
87	/***********************************************************************	175	/*****************************************************************************
88	*	176	* Start of command dispatch area.
89	* SockList functions/utilities	177	* The commands here are protocol commands.
90	*
91	**********************************************************************/	178	****************************************************************************/
92		179
93	void SockList_Init(SockList *sl)	180	// SocketCommand, PlayingCommand, should not exist with those ugly casts
94	{	181	#define SC(cb) (void )static_cast<void ()(char , int, client )>(cb),
95	sl->len=0;	182	#define PC(cb) (void )static_cast<void ()(char , int, player )>(cb), PF_PLAYER \|
96	sl->buf=NULL;
97	}
98		183
99	void SockList_AddChar(SockList *sl, char c)	184	/**
100	{	185	* 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	*/	186	*/
136	int GetInt_String(unsigned char *data)	187	static struct packet_type packets[] = {
137	{	188	{"ncom", PC(NewPlayerCmd) PF_PLAYING },
138	return ((data[0]<<24) + (data[1]<<16) + (data[2]<<8) + data[3]);	189	{"command", PC(PlayerCmd) PF_PLAYING },
139	}
140		190
141	short GetShort_String(unsigned char *data) {	191	{"examine", PC(ExamineCmd) PF_PLAYING },
142	return ((data[0]<<8)+data[1]);	192	{"apply", PC(ApplyCmd) PF_PLAYING },
143	}	193	{"reply", PC(ReplyCmd) PF_IMMEDIATE },
		194	{"lookat", PC(LookAt) PF_PLAYING },
		195	{"lock", PC(LockItem) PF_PLAYING },
		196	{"mark", PC(MarkItem) PF_PLAYING },
		197	{"move", PC(MoveCmd) PF_PLAYING },
		198	{"exti", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
		199	{"ext", PC(ExtCmd) 0 }, /* CF+ */
		200	{"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */
		201	{"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */
144		202
145	/******************************************************************************	203	{"addme", SC(AddMeCmd) PF_IMMEDIATE },
146	*	204	{"askface", SC(SendFaceCmd) PF_IMMEDIATE }, /* Added: phil */
147	* Start of read routines.	205	{"requestinfo", SC(RequestInfo) PF_IMMEDIATE },
148	*	206	{"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
149	******************************************************************************/	207	{"setsound", SC(SetSound) PF_IMMEDIATE },
		208	{"setup", SC(SetUp) PF_IMMEDIATE },
		209	{"version", SC(VersionCmd) PF_IMMEDIATE },
		210	{"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /Added: tchize /
		211	{"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /Added: tchize /
		212	{"asksmooth", SC(AskSmooth) PF_IMMEDIATE }, /Added: tchize (smoothing technologies) /
		213	};
150		214
151	/**	215	bool
152	* This reads from fd and puts the data in sl. We return true if we think	216	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	{	217	{
161	int stat,toread;	218	return (!(pkt->flags & PF_PLAYER) \|\| pl)
		219	&& (!(pkt->flags & PF_PLAYING) \|\| (pl && pl->state == ST_PLAYING));
		220	}
162		221
163	/* Sanity check - shouldn't happen */	222	void
164	if (sl->len < 0) {	223	client::execute (const packet_type pkt, char data, int datalen)
165	abort();	224	{
		225	if (may_execute (pkt))
166	}	226	{
167	/* We already have a partial packet */	227	//TODO: only one format
168	if (sl->len<2) {	228	if (pkt->flags & PF_PLAYER)
169	#ifdef WIN32 /* **WIN32 SockList_ReadPacket: change read() to recv() /	229	((void ()(char , int, player ))pkt->cb)((char )data, datalen, pl);
170		230	else
171	stat=recv(fd, sl->buf + sl->len, 2-sl->len,0);	231	((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	}	232	}
192	#else	233	else
193	if (errno != EAGAIN && errno !=EWOULDBLOCK) {	234	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));	235	}
		236
		237	bool
		238	client::handle_packet ()
		239	{
		240	int pkt_len = next_packet ();
		241
		242	if (!pkt_len)
		243	return false;
		244	else if (pkt_len < 0)
		245	{
		246	LOG (llevError, "read error on player %s\n",
		247	pl && pl->ob ? &pl->ob->name : "[anonymous]");
		248	destroy ();
		249	return false;
195	}	250	}
196	#endif	251
197	return 0; /Error /	252	inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
198	}	253
199	if (stat==0) return -1;	254	/* First, break out beginning word. There are at least
200	sl->len += stat;	255	* a few commands that do not have any paremeters. If
201	#ifdef CS_LOGSTATS	256	* we get such a command, don't worry about trying
202	cst_tot.ibytes += stat;	257	* 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	*/	258	*/
210	toread = 2+(sl->buf[0] << 8) + sl->buf[1] - sl->len;	259	int datalen;
211	if ((toread + sl->len) >= len) {	260	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		261
224	/* return error so the socket is closed */	262	if (data)
225	return -1;
226	}	263	{
227	do {	264	*data++ = 0;
228	#ifdef WIN32 /* **win32 SockList_ReadPacket: change read() to recv() /	265	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	}	266	}
247	#else	267	else
248	if (errno != EAGAIN && errno !=EWOULDBLOCK) {	268	{
249	LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno));	269	data = (char *)inbuf + 2; // better read garbage than segfault
		270	datalen = 0;
250	}	271	}
251	#endif	272
252	return 0; /Error /	273	for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
253	}	274	if (!strcmp ((char *)inbuf + 2, pkt->name))
254	if (stat==0) return -1;	275	{
255	sl->len += stat;	276	if (pkt->flags & PF_IMMEDIATE)
256	#ifdef CS_LOGSTATS	277	execute (pkt, data, datalen);
257	cst_tot.ibytes += stat;	278	else
258	cst_lst.ibytes += stat;	279	queue_command (pkt, data, datalen);
259	#endif	280
260	toread -= stat;	281	goto next_packet;
261	if (toread==0) return 1;	282	}
262	if (toread < 0) {	283
263	LOG(llevError,"SockList_ReadPacket: Read more bytes than desired.\n");	284	/* If we get here, we didn't find a valid command. Logging
264	return 1;	285	* this might be questionable, because a broken client/malicious
265	}	286	* user could certainly send a whole bunch of invalid commands.
266	} while (toread>0);	287	*/
		288	send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
		289	next_packet:
		290	skip_packet (pkt_len);
		291
		292	// input buffer has space again
		293	socket_ev.poll (socket_ev.poll () \| PE_R);
		294
		295	return true;
		296	}
		297
		298	// callback called when socket is either readable or writable
		299	void
		300	client::socket_cb (iow &w, int got)
		301	{
		302	//TODO remove when we have better socket cleanup logic
		303	if (status == Ns_Dead)
		304	{
		305	socket_ev.poll (0);
267	return 0;	306	return;
		307	}
		308
		309	if (got & PE_W)
		310	{
		311	write_outputbuffer ();
		312
		313	if (!outputbuffer.len)
		314	socket_ev.poll (socket_ev.poll () & ~PE_W);
		315	}
		316
		317	if (got & PE_R)
		318	{
		319	//TODO: rate-limit tcp connection in better ways, important
		320
		321	int amount = sizeof (inbuf) - inbuf_len;
		322
		323	if (!amount)
		324	{
		325	// input buffer full
		326	socket_ev.poll (socket_ev.poll () & ~PE_R);
		327	return;
		328	}
		329
		330	amount = read (fd, inbuf + inbuf_len, amount);
		331
		332	if (!amount)
		333	{
		334	destroy ();
		335	return;
		336	}
		337	else if (amount < 0)
		338	{
		339	if (errno != EAGAIN && errno != EINTR)
		340	{
		341	LOG (llevError, "read error: %s\n", strerror (errno));
		342	destroy ();
		343	return;
		344	}
		345
		346	// should not be here, normally
		347	}
		348	else
		349	{
		350	inbuf_len += amount;
		351
		352	cst_tot.ibytes += amount;
		353	cst_lst.ibytes += amount;
		354
		355	cmd_ev.start ();
		356	}
		357	}
		358	}
		359
		360	// called whenever we have additional commands to process
		361	void
		362	client::cmd_cb (iw &w)
		363	{
		364	if (handle_packet () \|\| handle_command ())
		365	w.start ();
		366	else
		367	flush ();
268	}	368	}
269		369
270	/*******************************************************************************	370	/*******************************************************************************
271	*	371	*
272	* Start of write related routines.	372	* Start of write related routines.
…		…
277	* Adds data to a socket buffer for whatever reason.	377	* Adds data to a socket buffer for whatever reason.
278	*	378	*
279	* ns is the socket we are adding the data to, buf is the start of the	379	* 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.	380	* data, and len is the number of bytes to add.
281	*/	381	*/
282		382	void
283	static void add_to_buffer(NewSocket ns, char buf, int len)	383	client::send (void *buf_, int len)
284	{	384	{
		385	char buf = (char )buf_;
		386	char *pos = buf;
		387	int amt = 0;
		388
		389	if (status == Ns_Dead \|\| !buf)
		390	return;
		391
		392	if ((len + outputbuffer.len) > SOCKETBUFSIZE)
		393	{
		394	LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
		395	destroy ();
		396	return;
		397	}
		398
285	int avail, end;	399	int avail, end;
286		400
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	401	/* data + end is where we start putting the new data. The last byte
295	* currently in use is actually data + end -1	402	* currently in use is actually data + end -1
296	*/	403	*/
297
298	end=ns->outputbuffer.start + ns->outputbuffer.len;	404	end = outputbuffer.start + outputbuffer.len;
299	/* The buffer is already in a wrapped state, so adjust end */	405	/* The buffer is already in a wrapped state, so adjust end */
300	if (end>=SOCKETBUFSIZE) end-=SOCKETBUFSIZE;	406	if (end >= SOCKETBUFSIZE)
		407	end -= SOCKETBUFSIZE;
		408
301	avail=SOCKETBUFSIZE - end;	409	avail = SOCKETBUFSIZE - end;
302		410
303	/* We can all fit it behind the current data without wrapping */	411	/* We can all fit it behind the current data without wrapping */
304	if (avail >=len ) {	412	if (avail >= len)
305	memcpy(ns->outputbuffer.data + end, buf, len);	413	memcpy (outputbuffer.data + end, buf, len);
		414	else
306	}	415	{
307	else {
308	memcpy(ns->outputbuffer.data + end, buf, avail);	416	memcpy (outputbuffer.data + end, buf, avail);
309	memcpy(ns->outputbuffer.data, buf+avail, len-avail);	417	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	}	418	}
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		419
376	/**	420	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	}	421	}
443
444		422
445	/**	423	/**
446	* Takes a string of data, and writes it out to the socket. A very handy	424	* Takes a string of data, and writes it out to the socket. A very handy
447	* shortcut function.	425	* shortcut function.
448	*/	426	*/
449	void cs_write_string(NewSocket ns, const char buf, int len)	427	void
		428	client::send_packet (packet &sl)
450	{	429	{
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)	430	if (status == Ns_Dead)
470	return;	431	return;
471		432
472	if (msg->len >= MAXSOCKBUF) {	433	if (sl.length () >= MAXSOCKBUF)
		434	{
473	LOG(llevError,"Trying to send a buffer beyond properly size, len =%d\n",	435	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	436	/* Almost certainly we've overflowed a buffer, so quit now to make
476	* it easier to debug.	437	* it easier to debug.
477	*/	438	*/
478	abort();	439	abort ();
479	}	440	}
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		441
487	/**	442	if (!sl.length ())
488	* Takes a string of data, and writes it out to the socket. A very handy	443	return;
489	* shortcut function.	444
		445	assert (sl.hdrlen == 2);
		446
		447	sl.buf_ [0] = sl.length () >> 8;
		448	sl.buf_ [1] = sl.length () ;
		449
		450	send (sl.buf_, sl.length () + sl.hdrlen);
		451	}
		452
		453	void
		454	client::send_packet (const char *buf, int len)
		455	{
		456	packet sl;
		457
		458	sl << data (buf, len);
		459	send_packet (sl);
		460	}
		461
		462	void
		463	client::send_packet (const char *buf)
		464	{
		465	send_packet (buf, strlen (buf));
		466	}
		467
		468	void
		469	client::send_packet_printf (const char *format, ...)
		470	{
		471	packet sl;
		472
		473	va_list ap;
		474	va_start (ap, format);
		475	sl.vprintf (format, ap);
		476	va_end (ap);
		477
		478	send_packet (sl);
		479	}
		480
		481	/***********************************************************************
490	*/	482	*
491	void Write_String_To_Socket(NewSocket ns, char buf, int len)	483	* packet functions/utilities
492	{	484	*
493	SockList sl;	485	**********************************************************************/
494		486
495	sl.len = len;	487	packet &packet::operator <<(const data &v)
496	sl.buf = (unsigned char*) buf;	488	{
497	Send_With_Handling(ns, &sl);	489	if (room () < v.len)
498	}	490	reset ();
		491	else
		492	{
		493	if (v.len)
		494	{
		495	memcpy (cur, v.ptr, v.len);
		496	cur += v.len;
		497	}
		498	}
499		499
		500	return *this;
		501	}
		502
		503	packet &packet::operator <<(const data8 &v)
		504	{
		505	unsigned int len = min (v.len, 0x00FF);
		506	return *this << uint8 (len) << data (v.ptr, len);
		507	}
		508
		509	packet &packet::operator <<(const data16 &v)
		510	{
		511	unsigned int len = min (v.len, 0xFFFF);
		512	return *this << uint16 (len) << data (v.ptr, len);
		513	}
		514
		515	packet &packet::operator <<(const char *v)
		516	{
		517	return *this << data (v, strlen (v ? v : 0));
		518	}
		519
		520	void
		521	packet::vprintf (const char *format, va_list ap)
		522	{
		523	int size = room ();
		524
		525	int len = vsnprintf ((char *)cur, size, format, ap);
		526
		527	if (len >= size)
		528	return reset ();
		529
		530	cur += len;
		531	}
500		532
501	/******************************************************************************	533	/******************************************************************************
502	*	534	*
503	* statistics logging functions.	535	* statistics logging functions.
504	*	536	*
505	******************************************************************************/	537	******************************************************************************/
506		538
507	#ifdef CS_LOGSTATS	539	#ifdef CS_LOGSTATS
		540
508	/* cst_tot is for the life of the server, cst_last is for the last series of	541	/* cst_tot is for the life of the server, cst_last is for the last series of
509	* stats	542	* stats
510	*/	543	*/
511	CS_Stats cst_tot, cst_lst;	544	CS_Stats cst_tot, cst_lst;
512		545
513	/**	546	/**
514	* Writes out the gathered stats. We clear cst_lst.	547	* Writes out the gathered stats. We clear cst_lst.
515	*/	548	*/
		549	void
516	void write_cs_stats(void)	550	write_cs_stats (void)
517	{	551	{
518	time_t now=time(NULL);	552	time_t now = time (NULL);
519		553
520	/* If no connections recently, don't both to log anything */	554	/* If no connections recently, don't both to log anything */
521	if (cst_lst.ibytes==0 && cst_lst.obytes==0) return;	555	if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
		556	return;
522		557
523	/* CSSTAT is put in so scripts can easily find the line */	558	/* 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",	559	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,	560	ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
526	now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes,	561	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;	562	cst_lst.ibytes = 0;
529	cst_lst.obytes=0;	563	cst_lst.obytes = 0;
530	cst_lst.max_conn=socket_info.nconns;
531	cst_lst.time_start=now;	564	cst_lst.time_start = now;
532	}	565	}
533	#endif	566	#endif
		567

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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 1.25 by root, Sun Dec 17 19:14:00 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 1.25 by root, Sun Dec 17 19:14:00 2006 UTC