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

Comparing:
ircd-hybrid-8/src/packet.c (file contents), Revision 1243 by michael, Fri Sep 30 10:47:53 2011 UTC vs.
ircd-hybrid/trunk/src/packet.c (file contents), Revision 3113 by michael, Thu Mar 6 22:19:29 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 18 | Line 17
17		*  along with this program; if not, write to the Free Software
18		*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
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 "list.h"
29		#include "s_bsd.h"
30	<	#include "s_conf.h"
30	>	#include "conf.h"
31		#include "s_serv.h"
32		#include "client.h"
33		#include "ircd.h"
#	Line 39 | Line 42
42
43		#define READBUF_SIZE 16384
44
42	–	struct Callback *iorecv_cb = NULL;
43	–	struct Callback *iorecvctrl_cb = NULL;
44	–
45		static char readBuf[READBUF_SIZE];
46		static void client_dopacket(struct Client *, char *, size_t);
47
#	Line 55 | Line 55 | static void client_dopacket(struct Clien
55		static int
56		extract_one_line(struct dbuf_queue *qptr, char *buffer)
57		{
58	–	struct dbuf_block *block;
58		int line_bytes = 0, empty_bytes = 0, phase = 0;
59	<	unsigned int idx;
60	<
62	<	char c;
63	<	dlink_node *ptr;
59	>	unsigned int idx = 0;
60	>	dlink_node *ptr = NULL;
61
62		/*
63		* Phase 0: "empty" characters before the line
#	Line 76 | Line 73 | extract_one_line(struct dbuf_queue *qptr
73		*/
74		DLINK_FOREACH(ptr, qptr->blocks.head)
75		{
76	<	block = ptr->data;
76	>	struct dbuf_block *block = ptr->data;
77	>
78	>	if (ptr == qptr->blocks.head)
79	>	idx = qptr->pos;
80	>	else
81	>	idx = 0;
82
83	<	for (idx = 0; idx < block->size; idx++)
83	>	for (; idx < block->size; ++idx)
84		{
85	<	c = block->data[idx];
85	>	char c = block->data[idx];
86	>
87		if (IsEol(c) || (c == ' ' && phase != 1))
88		{
89	<	empty_bytes++;
89	>	++empty_bytes;
90		if (phase == 1)
91		phase = 2;
92		}
#	Line 113 | 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		}
116	–
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;
#	Line 128 | Line 130 | parse_client_queued(struct Client *clien
130		{
131		int i = 0;
132
133	<	for(;;)
133	>	for (; ;)
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)
#	Line 139 | Line 141 | parse_client_queued(struct Client *clien
141
142		dolen = extract_one_line(&lclient_p->buf_recvq, readBuf);
143		if (dolen == 0)
144	<	break;
144	>	break;
145
146		client_dopacket(client_p, readBuf, dolen);
147		i++;
#	Line 179 | Line 181 | parse_client_queued(struct Client *clien
181		* messages in this loop, we simply drop out of the loop prematurely.
182		*   -- adrian
183		*/
184	<	for (;;)
184	>	for (; ;)
185		{
186		if (IsDefunct(client_p))
187	<	break;
187	>	break;
188
189		/* This flood protection works as follows:
190		*
#	Line 202 | Line 204 | parse_client_queued(struct Client *clien
204		if(lclient_p->sent_parsed >= lclient_p->allow_read)
205		break;
206		}
207	<
207	>
208		/* allow opers 4 times the amount of messages as users. why 4?
209		* why not. :) --fl_
210		*/
#	Line 249 | Line 251 | flood_recalc(fde_t *fd, void *data)
251		{
252		struct Client *client_p = data;
253		struct LocalUser *lclient_p = client_p->localClient;
254	<
254	>
255		/* allow a bursting client their allocation per second, allow
256		* a client whos flooding an extra 2 per second
257		*/
#	Line 257 | Line 259 | flood_recalc(fde_t *fd, void *data)
259		lclient_p->sent_parsed -= 2;
260		else
261		lclient_p->sent_parsed = 0;
262	<
262	>
263		if (lclient_p->sent_parsed < 0)
264		lclient_p->sent_parsed = 0;
265	<
265	>
266		parse_client_queued(client_p);
267	<
267	>
268		/* And now, try flushing .. */
269		if (!IsDead(client_p))
270		{
#	Line 272 | Line 274 | flood_recalc(fde_t *fd, void *data)
274		}
275
276		/*
275	–	* read_ctrl_packet - Read a 'packet' of data from a servlink control
276	–	*                    link and process it.
277	–	*/
278	–	void
279	–	read_ctrl_packet(fde_t *fd, void *data)
280	–	{
281	–	struct Client *server = data;
282	–	struct LocalUser *lserver = server->localClient;
283	–	struct SlinkRpl *reply;
284	–	int length = 0;
285	–	unsigned char tmp[2];
286	–	unsigned char *len = tmp;
287	–	struct SlinkRplDef *replydef;
288	–
289	–	assert(lserver != NULL);
290	–
291	–	reply = &lserver->slinkrpl;
292	–
293	–	if (IsDefunct(server))
294	–	return;
295	–
296	–	if (!reply->command)
297	–	{
298	–	reply->gotdatalen = 0;
299	–	reply->readdata = 0;
300	–	reply->data = NULL;
301	–
302	–	length = recv(fd->fd, tmp, 1, 0);
303	–
304	–	if (length <= 0)
305	–	{
306	–	if ((length == -1) && ignoreErrno(errno))
307	–	goto nodata;
308	–	dead_link_on_read(server, length);
309	–	return;
310	–	}
311	–	reply->command = tmp[0];
312	–	}
313	–
314	–	for (replydef = slinkrpltab; replydef->handler; replydef++)
315	–	{
316	–	if (replydef->replyid == (unsigned int)reply->command)
317	–	break;
318	–	}
319	–
320	–	/* we should be able to trust a local slink process...
321	–	* and if it sends an invalid command, that's a bug.. */
322	–	assert(replydef->handler);
323	–
324	–	if ((replydef->flags & SLINKRPL_FLAG_DATA) && (reply->gotdatalen < 2))
325	–	{
326	–	/* we need a datalen u16 which we don't have yet... */
327	–	length = recv(fd->fd, len, (2 - reply->gotdatalen), 0);
328	–	if (length <= 0)
329	–	{
330	–	if ((length == -1) && ignoreErrno(errno))
331	–	goto nodata;
332	–	dead_link_on_read(server, length);
333	–	return;
334	–	}
335	–
336	–	if (reply->gotdatalen == 0)
337	–	{
338	–	reply->datalen = *len << 8;
339	–	reply->gotdatalen++;
340	–	length--;
341	–	len++;
342	–	}
343	–	if (length && (reply->gotdatalen == 1))
344	–	{
345	–	reply->datalen |= *len;
346	–	reply->gotdatalen++;
347	–	if (reply->datalen > 0)
348	–	reply->data = MyMalloc(reply->datalen);
349	–	}
350	–
351	–	if (reply->gotdatalen < 2)
352	–	return; /* wait for more data */
353	–	}
354	–
355	–	if (reply->readdata < reply->datalen) /* try to get any remaining data */
356	–	{
357	–	length = recv(fd->fd, (reply->data + reply->readdata),
358	–	(reply->datalen - reply->readdata), 0);
359	–	if (length <= 0)
360	–	{
361	–	if ((length == -1) && ignoreErrno(errno))
362	–	goto nodata;
363	–	dead_link_on_read(server, length);
364	–	return;
365	–	}
366	–
367	–	reply->readdata += length;
368	–	if (reply->readdata < reply->datalen)
369	–	return; /* wait for more data */
370	–	}
371	–
372	–	execute_callback(iorecvctrl_cb, server, reply->command);
373	–
374	–	/* we now have the command and any data, pass it off to the handler */
375	–	(*replydef->handler)(reply->command, reply->datalen, reply->data, server);
376	–
377	–	/* reset SlinkRpl */
378	–	if (reply->datalen > 0)
379	–	MyFree(reply->data);
380	–	reply->command = 0;
381	–
382	–	if (IsDead(server))
383	–	return;
384	–
385	–	nodata:
386	–	/* If we get here, we need to register for another COMM_SELECT_READ */
387	–	comm_setselect(fd, COMM_SELECT_READ, read_ctrl_packet, server, 0);
388	–	}
389	–
390	–	/*
391	–	* iorecv_default - append a packet to the recvq dbuf
392	–	*/
393	–	void *
394	–	iorecv_default(va_list args)
395	–	{
396	–	struct Client *client_p = va_arg(args, struct Client *);
397	–	int length = va_arg(args, int);
398	–	char *buf = va_arg(args, char *);
399	–
400	–	dbuf_put(&client_p->localClient->buf_recvq, buf, length);
401	–	return NULL;
402	–	}
403	–
404	–	/*
277		* read_packet - Read a 'packet' of data from a connection and process it.
278		*/
279		void
#	Line 418 | Line 290 | read_packet(fde_t *fd, void *data)
290		* I personally think it makes the code too hairy to make sane.
291		*     -- adrian
292		*/
293	<	do {
293	>	do
294	>	{
295		#ifdef HAVE_LIBCRYPTO
296		if (fd->ssl)
297		{
#	Line 427 | Line 300 | read_packet(fde_t *fd, void *data)
300		/* translate openssl error codes, sigh */
301		if (length < 0)
302		switch (SSL_get_error(fd->ssl, length))
303	<	{
303	>	{
304		case SSL_ERROR_WANT_WRITE:
305	<	fd->flags.pending_read = 1;
306	<	SetSendqBlocked(client_p);
307	<	comm_setselect(fd, COMM_SELECT_WRITE, (PF *) sendq_unblocked,
308	<	client_p, 0);
436	<	return;
437	<	case SSL_ERROR_WANT_READ:
438	<	errno = EWOULDBLOCK;
305	>	comm_setselect(fd, COMM_SELECT_WRITE, (PF *)sendq_unblocked, client_p, 0);
306	>	return;
307	>	case SSL_ERROR_WANT_READ:
308	>	errno = EWOULDBLOCK;
309		case SSL_ERROR_SYSCALL:
310	<	break;
310	>	break;
311		case SSL_ERROR_SSL:
312		if (errno == EAGAIN)
313		break;
314		default:
315	<	length = errno = 0;
316	<	}
315	>	length = errno = 0;
316	>	}
317		}
318		else
319		#endif
#	Line 464 | Line 334 | read_packet(fde_t *fd, void *data)
334		return;
335		}
336
337	<	execute_callback(iorecv_cb, client_p, length, readBuf);
337	>	dbuf_put(&client_p->localClient->buf_recvq, readBuf, length);
338
339		if (client_p->localClient->lasttime < CurrentTime)
340		client_p->localClient->lasttime = CurrentTime;
#	Line 479 | Line 349 | read_packet(fde_t *fd, void *data)
349		return;
350
351		/* Check to make sure we're not flooding */
482	–	/* TBD - ConfigFileEntry.client_flood should be a size_t */
352		if (!(IsServer(client_p) || IsHandshake(client_p) || IsConnecting(client_p))
353		&& (dbuf_length(&client_p->localClient->buf_recvq) >
354	<	(unsigned int)ConfigFileEntry.client_flood))
354	>	get_recvq(&client_p->localClient->confs)))
355		{
356		if (!(ConfigFileEntry.no_oper_flood && HasUMode(client_p, UMODE_OPER)))
357		{
#	Line 516 | Line 385 | read_packet(fde_t *fd, void *data)
385		static void
386		client_dopacket(struct Client *client_p, char *buffer, size_t length)
387		{
388	<	/*
388	>	/*
389		* Update messages received
390		*/
391		++me.localClient->recv.messages;
392		++client_p->localClient->recv.messages;
393
394	<	/*
394	>	/*
395		* Update bytes received
396		*/
397		client_p->localClient->recv.bytes += length;

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