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root/svn/ircd-hybrid/trunk/src/packet.c

Comparing:
ircd-hybrid-7.2/src/packet.c (file contents), Revision 428 by michael, Sat Feb 11 12:21:51 2006 UTC vs.
ircd-hybrid/trunk/src/packet.c (file contents), Revision 4894 by michael, Wed Nov 19 17:16:06 2014 UTC

#	Line 1 | Line 1
1		/*
2	<	*  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	<	*  packet.c: Packet handlers.
2	>	*  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3		*
4	<	*  Copyright (C) 2002 by the past and present ircd coders, and others.
4	>	*  Copyright (c) 1997-2014 ircd-hybrid development team
5		*
6		*  This program is free software; you can redistribute it and/or modify
7		*  it under the terms of the GNU General Public License as published by
#	Line 16 | Line 15
15		*
16		*  You should have received a copy of the GNU General Public License
17		*  along with this program; if not, write to the Free Software
18	<	*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
18	>	*  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19		*  USA
21	–	*
22	–	*  $Id$
20		*/
21	+
22	+	/*! \file packet.c
23	+	* \brief Packet handlers.
24	+	* \version $Id$
25	+	*/
26	+
27		#include "stdinc.h"
28	<	#include "tools.h"
28	>	#include "list.h"
29		#include "s_bsd.h"
30	<	#include "s_conf.h"
31	<	#include "s_serv.h"
30	>	#include "conf.h"
31	>	#include "server.h"
32		#include "client.h"
30	–	#include "common.h"
33		#include "ircd.h"
32	–	#include "list.h"
34		#include "parse.h"
35		#include "fdlist.h"
36		#include "packet.h"
37		#include "irc_string.h"
38		#include "memory.h"
38	–	#include "hook.h"
39		#include "send.h"
40	<	#include "irc_getnameinfo.h"
40	>	#include "misc.h"
41
42		#define READBUF_SIZE 16384
43
44	–	struct Callback *iorecv_cb = NULL;
45	–	struct Callback *iorecvctrl_cb = NULL;
46	–
44		static char readBuf[READBUF_SIZE];
45		static void client_dopacket(struct Client *, char *, size_t);
46
#	Line 57 | Line 54 | static void client_dopacket(struct Clien
54		static int
55		extract_one_line(struct dbuf_queue *qptr, char *buffer)
56		{
60	–	struct dbuf_block *block;
57		int line_bytes = 0, empty_bytes = 0, phase = 0;
58	<	unsigned int idx;
59	<
64	<	char c;
65	<	dlink_node *ptr;
58	>	unsigned int idx = 0;
59	>	dlink_node *node = NULL;
60
61		/*
62		* Phase 0: "empty" characters before the line
#	Line 76 | Line 70 | extract_one_line(struct dbuf_queue *qptr
70		*
71		* --adx
72		*/
73	<	DLINK_FOREACH(ptr, qptr->blocks.head)
73	>	DLINK_FOREACH(node, qptr->blocks.head)
74		{
75	<	block = ptr->data;
75	>	struct dbuf_block *block = node->data;
76	>
77	>	if (node == qptr->blocks.head)
78	>	idx = qptr->pos;
79	>	else
80	>	idx = 0;
81
82	<	for (idx = 0; idx < block->size; idx++)
82	>	for (; idx < block->size; ++idx)
83		{
84	<	c = block->data[idx];
84	>	char c = block->data[idx];
85	>
86		if (IsEol(c) || (c == ' ' && phase != 1))
87		{
88	<	empty_bytes++;
88	>	++empty_bytes;
89	>
90		if (phase == 1)
91		phase = 2;
92		}
#	Line 115 | Line 116 | extract_one_line(struct dbuf_queue *qptr
116		dbuf_delete(qptr, line_bytes + empty_bytes);
117		return IRCD_MIN(line_bytes, IRCD_BUFSIZE - 2);
118		}
118	–
119		/*
120		* parse_client_queued - parse client queued messages
121		*/
122		static void
123		parse_client_queued(struct Client *client_p)
124	<	{
124	>	{
125		int dolen = 0;
126		int checkflood = 1;
127	<	struct LocalUser *lclient_p = client_p->localClient;
127	>	struct Connection *lclient_p = client_p->connection;
128
129		if (IsUnknown(client_p))
130		{
131		int i = 0;
132
133	<	for(;;)
133	>	while (1)
134		{
135		if (IsDefunct(client_p))
136	<	return;
136	>	return;
137
138		/* rate unknown clients at MAX_FLOOD per loop */
139		if (i >= MAX_FLOOD)
140		break;
141
142		dolen = extract_one_line(&lclient_p->buf_recvq, readBuf);
143	+
144		if (dolen == 0)
145	<	break;
145	>	break;
146
147		client_dopacket(client_p, readBuf, dolen);
148		i++;
#	Line 149 | Line 150 | parse_client_queued(struct Client *clien
150		/* if they've dropped out of the unknown state, break and move
151		* to the parsing for their appropriate status.  --fl
152		*/
153	<	if(!IsUnknown(client_p))
153	>	if (!IsUnknown(client_p))
154		break;
155		}
156		}
#	Line 160 | Line 161 | parse_client_queued(struct Client *clien
161		{
162		if (IsDefunct(client_p))
163		return;
164	<	if ((dolen = extract_one_line(&lclient_p->buf_recvq,
165	<	readBuf)) == 0)
164	>
165	>	if ((dolen = extract_one_line(&lclient_p->buf_recvq, readBuf)) == 0)
166		break;
167	+
168		client_dopacket(client_p, readBuf, dolen);
169		}
170		}
171		else if (IsClient(client_p))
172		{
173	<	if (ConfigFileEntry.no_oper_flood && (IsOper(client_p) || IsCanFlood(client_p)))
173	>	if (ConfigGeneral.no_oper_flood && (HasUMode(client_p, UMODE_OPER) || IsCanFlood(client_p)))
174		{
175	<	if (ConfigFileEntry.true_no_oper_flood)
175	>	if (ConfigGeneral.true_no_oper_flood)
176		checkflood = -1;
177		else
178		checkflood = 0;
#	Line 181 | Line 183 | parse_client_queued(struct Client *clien
183		* messages in this loop, we simply drop out of the loop prematurely.
184		*   -- adrian
185		*/
186	<	for (;;)
186	>	while (1)
187		{
188		if (IsDefunct(client_p))
189	<	break;
189	>	break;
190
191		/* This flood protection works as follows:
192		*
#	Line 201 | Line 203 | parse_client_queued(struct Client *clien
203		*/
204		if (checkflood > 0)
205		{
206	<	if(lclient_p->sent_parsed >= lclient_p->allow_read)
206	>	if (lclient_p->sent_parsed >= lclient_p->allow_read)
207		break;
208		}
209	<
210	<	/* allow opers 4 times the amount of messages as users. why 4?
209	>
210	>	/*
211	>	* Allow opers 4 times the amount of messages as users. why 4?
212		* why not. :) --fl_
213		*/
214	<	else if (lclient_p->sent_parsed >= (4 * lclient_p->allow_read) &&
212	<	checkflood != -1)
214	>	else if (lclient_p->sent_parsed >= (4 * lclient_p->allow_read) && checkflood != -1)
215		break;
216
217		dolen = extract_one_line(&lclient_p->buf_recvq, readBuf);
218	+
219		if (dolen == 0)
220		break;
221
#	Line 232 | Line 235 | flood_endgrace(struct Client *client_p)
235		SetFloodDone(client_p);
236
237		/* Drop their flood limit back down */
238	<	client_p->localClient->allow_read = MAX_FLOOD;
238	>	client_p->connection->allow_read = MAX_FLOOD;
239
240		/* sent_parsed could be way over MAX_FLOOD but under MAX_FLOOD_BURST,
241		* so reset it.
242		*/
243	<	client_p->localClient->sent_parsed = 0;
243	>	client_p->connection->sent_parsed = 0;
244		}
245
246		/*
#	Line 250 | Line 253 | void
253		flood_recalc(fde_t *fd, void *data)
254		{
255		struct Client *client_p = data;
256	<	struct LocalUser *lclient_p = client_p->localClient;
257	<
258	<	/* allow a bursting client their allocation per second, allow
256	>	struct Connection *lclient_p = client_p->connection;
257	>
258	>	/*
259	>	* Allow a bursting client their allocation per second, allow
260		* a client whos flooding an extra 2 per second
261		*/
262		if (IsFloodDone(client_p))
263		lclient_p->sent_parsed -= 2;
264		else
265		lclient_p->sent_parsed = 0;
266	<
266	>
267		if (lclient_p->sent_parsed < 0)
268		lclient_p->sent_parsed = 0;
269	<
269	>
270		parse_client_queued(client_p);
271	<
271	>
272		/* And now, try flushing .. */
273		if (!IsDead(client_p))
274		{
#	Line 274 | Line 278 | flood_recalc(fde_t *fd, void *data)
278		}
279
280		/*
277	–	* read_ctrl_packet - Read a 'packet' of data from a servlink control
278	–	*                    link and process it.
279	–	*/
280	–	void
281	–	read_ctrl_packet(fde_t *fd, void *data)
282	–	{
283	–	struct Client *server = data;
284	–	struct LocalUser *lserver = server->localClient;
285	–	struct SlinkRpl *reply;
286	–	int length = 0;
287	–	unsigned char tmp[2];
288	–	unsigned char *len = tmp;
289	–	struct SlinkRplDef *replydef;
290	–
291	–	assert(lserver != NULL);
292	–
293	–	reply = &lserver->slinkrpl;
294	–
295	–	if (IsDefunct(server))
296	–	return;
297	–
298	–	if (!reply->command)
299	–	{
300	–	reply->gotdatalen = 0;
301	–	reply->readdata = 0;
302	–	reply->data = NULL;
303	–
304	–	length = recv(fd->fd, tmp, 1, 0);
305	–
306	–	if (length <= 0)
307	–	{
308	–	if ((length == -1) && ignoreErrno(errno))
309	–	goto nodata;
310	–	dead_link_on_read(server, length);
311	–	return;
312	–	}
313	–	reply->command = tmp[0];
314	–	}
315	–
316	–	for (replydef = slinkrpltab; replydef->handler; replydef++)
317	–	{
318	–	if (replydef->replyid == (unsigned int)reply->command)
319	–	break;
320	–	}
321	–
322	–	/* we should be able to trust a local slink process...
323	–	* and if it sends an invalid command, that's a bug.. */
324	–	assert(replydef->handler);
325	–
326	–	if ((replydef->flags & SLINKRPL_FLAG_DATA) && (reply->gotdatalen < 2))
327	–	{
328	–	/* we need a datalen u16 which we don't have yet... */
329	–	length = recv(fd->fd, len, (2 - reply->gotdatalen), 0);
330	–	if (length <= 0)
331	–	{
332	–	if ((length == -1) && ignoreErrno(errno))
333	–	goto nodata;
334	–	dead_link_on_read(server, length);
335	–	return;
336	–	}
337	–
338	–	if (reply->gotdatalen == 0)
339	–	{
340	–	reply->datalen = *len << 8;
341	–	reply->gotdatalen++;
342	–	length--;
343	–	len++;
344	–	}
345	–	if (length && (reply->gotdatalen == 1))
346	–	{
347	–	reply->datalen |= *len;
348	–	reply->gotdatalen++;
349	–	if (reply->datalen > 0)
350	–	reply->data = MyMalloc(reply->datalen);
351	–	}
352	–
353	–	if (reply->gotdatalen < 2)
354	–	return; /* wait for more data */
355	–	}
356	–
357	–	if (reply->readdata < reply->datalen) /* try to get any remaining data */
358	–	{
359	–	length = recv(fd->fd, (reply->data + reply->readdata),
360	–	(reply->datalen - reply->readdata), 0);
361	–	if (length <= 0)
362	–	{
363	–	if ((length == -1) && ignoreErrno(errno))
364	–	goto nodata;
365	–	dead_link_on_read(server, length);
366	–	return;
367	–	}
368	–
369	–	reply->readdata += length;
370	–	if (reply->readdata < reply->datalen)
371	–	return; /* wait for more data */
372	–	}
373	–
374	–	execute_callback(iorecvctrl_cb, server, reply->command);
375	–
376	–	/* we now have the command and any data, pass it off to the handler */
377	–	(*replydef->handler)(reply->command, reply->datalen, reply->data, server);
378	–
379	–	/* reset SlinkRpl */
380	–	if (reply->datalen > 0)
381	–	MyFree(reply->data);
382	–	reply->command = 0;
383	–
384	–	if (IsDead(server))
385	–	return;
386	–
387	–	nodata:
388	–	/* If we get here, we need to register for another COMM_SELECT_READ */
389	–	comm_setselect(fd, COMM_SELECT_READ, read_ctrl_packet, server, 0);
390	–	}
391	–
392	–	/*
393	–	* iorecv_default - append a packet to the recvq dbuf
394	–	*/
395	–	void *
396	–	iorecv_default(va_list args)
397	–	{
398	–	struct Client *client_p = va_arg(args, struct Client *);
399	–	int length = va_arg(args, int);
400	–	char *buf = va_arg(args, char *);
401	–
402	–	dbuf_put(&client_p->localClient->buf_recvq, buf, length);
403	–	return NULL;
404	–	}
405	–
406	–	/*
281		* read_packet - Read a 'packet' of data from a connection and process it.
282		*/
283		void
#	Line 420 | Line 294 | read_packet(fde_t *fd, void *data)
294		* I personally think it makes the code too hairy to make sane.
295		*     -- adrian
296		*/
297	<	do {
297	>	do
298	>	{
299		#ifdef HAVE_LIBCRYPTO
300		if (fd->ssl)
301		{
302	<	length = SSL_read(fd->ssl, readBuf, READBUF_SIZE);
302	>	length = SSL_read(fd->ssl, readBuf, sizeof(readBuf));
303
304		/* translate openssl error codes, sigh */
305		if (length < 0)
306		switch (SSL_get_error(fd->ssl, length))
307	<	{
307	>	{
308		case SSL_ERROR_WANT_WRITE:
309	<	fd->flags.pending_read = 1;
310	<	SetSendqBlocked(client_p);
311	<	comm_setselect(fd, COMM_SELECT_WRITE, (PF *) sendq_unblocked,
312	<	client_p, 0);
438	<	return;
439	<	case SSL_ERROR_WANT_READ:
440	<	errno = EWOULDBLOCK;
309	>	comm_setselect(fd, COMM_SELECT_WRITE, sendq_unblocked, client_p, 0);
310	>	return;
311	>	case SSL_ERROR_WANT_READ:
312	>	errno = EWOULDBLOCK;
313		case SSL_ERROR_SYSCALL:
314	<	break;
314	>	break;
315		case SSL_ERROR_SSL:
316		if (errno == EAGAIN)
317		break;
318		default:
319	<	length = errno = 0;
320	<	}
319	>	length = errno = 0;
320	>	}
321		}
322		else
323		#endif
324		{
325	<	length = recv(fd->fd, readBuf, READBUF_SIZE, 0);
454	<	#ifdef _WIN32
455	<	if (length < 0)
456	<	errno = WSAGetLastError();
457	<	#endif
325	>	length = recv(fd->fd, readBuf, sizeof(readBuf), 0);
326		}
327
328		if (length <= 0)
#	Line 470 | Line 338 | read_packet(fde_t *fd, void *data)
338		return;
339		}
340
341	<	execute_callback(iorecv_cb, client_p, length, readBuf);
341	>	dbuf_put(&client_p->connection->buf_recvq, readBuf, length);
342	>
343	>	if (client_p->connection->lasttime < CurrentTime)
344	>	client_p->connection->lasttime = CurrentTime;
345	>
346	>	if (client_p->connection->lasttime > client_p->connection->since)
347	>	client_p->connection->since = CurrentTime;
348
475	–	if (client_p->lasttime < CurrentTime)
476	–	client_p->lasttime = CurrentTime;
477	–	if (client_p->lasttime > client_p->since)
478	–	client_p->since = CurrentTime;
349		ClearPingSent(client_p);
350
351		/* Attempt to parse what we have */
#	Line 485 | Line 355 | read_packet(fde_t *fd, void *data)
355		return;
356
357		/* Check to make sure we're not flooding */
488	–	/* TBD - ConfigFileEntry.client_flood should be a size_t */
358		if (!(IsServer(client_p) || IsHandshake(client_p) || IsConnecting(client_p))
359	<	&& (dbuf_length(&client_p->localClient->buf_recvq) >
360	<	(unsigned int)ConfigFileEntry.client_flood))
359	>	&& (dbuf_length(&client_p->connection->buf_recvq) >
360	>	get_recvq(&client_p->connection->confs)))
361		{
362	<	if (!(ConfigFileEntry.no_oper_flood && IsOper(client_p)))
362	>	if (!(ConfigGeneral.no_oper_flood && HasUMode(client_p, UMODE_OPER)))
363		{
364	<	exit_client(client_p, client_p, "Excess Flood");
364	>	exit_client(client_p, "Excess Flood");
365		return;
366		}
367		}
#	Line 522 | Line 391 | read_packet(fde_t *fd, void *data)
391		static void
392		client_dopacket(struct Client *client_p, char *buffer, size_t length)
393		{
394	<	/*
394	>	/*
395		* Update messages received
396		*/
397	<	++me.localClient->recv.messages;
398	<	++client_p->localClient->recv.messages;
397	>	++me.connection->recv.messages;
398	>	++client_p->connection->recv.messages;
399
400	<	/*
400	>	/*
401		* Update bytes received
402		*/
403	<	client_p->localClient->recv.bytes += length;
404	<	me.localClient->recv.bytes += length;
403	>	client_p->connection->recv.bytes += length;
404	>	me.connection->recv.bytes += length;
405
406		parse(client_p, buffer, buffer + length);
407		}

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