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

Comparing:
ircd-hybrid/src/packet.c (file contents), Revision 33 by knight, Sun Oct 2 20:50:00 2005 UTC vs.
ircd-hybrid/trunk/src/packet.c (file contents), Revision 3107 by michael, Thu Mar 6 12:09:42 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 "tools.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"
30	–	#include "common.h"
33		#include "ircd.h"
32	–	#include "list.h"
34		#include "parse.h"
35		#include "fdlist.h"
36		#include "packet.h"
#	Line 37 | Line 38
38		#include "memory.h"
39		#include "hook.h"
40		#include "send.h"
41	<	#include "irc_getnameinfo.h"
41	>	#include "s_misc.h"
42
43		#define READBUF_SIZE 16384
44
44	–	struct Callback *iorecv_cb = NULL;
45	–	struct Callback *iorecvctrl_cb = NULL;
46	–
45		static char readBuf[READBUF_SIZE];
46		static void client_dopacket(struct Client *, char *, size_t);
47
#	Line 57 | Line 55 | static void client_dopacket(struct Clien
55		static int
56		extract_one_line(struct dbuf_queue *qptr, char *buffer)
57		{
60	–	struct dbuf_block *block;
58		int line_bytes = 0, empty_bytes = 0, phase = 0;
59	<	unsigned int idx;
60	<
64	<	char c;
65	<	dlink_node *ptr;
59	>	unsigned int idx = 0;
60	>	dlink_node *ptr = NULL;
61
62		/*
63		* Phase 0: "empty" characters before the line
#	Line 78 | 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 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;
#	Line 130 | 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 141 | 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 166 | Line 166 | parse_client_queued(struct Client *clien
166		client_dopacket(client_p, readBuf, dolen);
167		}
168		}
169	<	else if(IsClient(client_p))
169	>	else if (IsClient(client_p))
170		{
171	<	if (ConfigFileEntry.no_oper_flood && (IsOper(client_p) || IsCanFlood(client_p)))
171	>	if (ConfigFileEntry.no_oper_flood && (HasUMode(client_p, UMODE_OPER) || IsCanFlood(client_p)))
172		{
173		if (ConfigFileEntry.true_no_oper_flood)
174		checkflood = -1;
#	Line 181 | 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 204 | 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 251 | 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 259 | 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 274 | Line 274 | flood_recalc(fde_t *fd, void *data)
274		}
275
276		/*
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	–	/*
277		* read_packet - Read a 'packet' of data from a connection and process it.
278		*/
279		void
#	Line 406 | 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 415 | 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);
424	<	return;
425	<	case SSL_ERROR_WANT_READ:
426	<	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
320		{
321		length = recv(fd->fd, readBuf, READBUF_SIZE, 0);
437	–	#ifdef _WIN32
438	–	if (length < 0)
439	–	errno = WSAGetLastError();
440	–	#endif
322		}
323
324		if (length <= 0)
#	Line 453 | 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_raw(&client_p->localClient->buf_recvq, readBuf, length);
338
339	<	if (client_p->lasttime < CurrentTime)
340	<	client_p->lasttime = CurrentTime;
341	<	if (client_p->lasttime > client_p->since)
342	<	client_p->since = CurrentTime;
339	>	if (client_p->localClient->lasttime < CurrentTime)
340	>	client_p->localClient->lasttime = CurrentTime;
341	>	if (client_p->localClient->lasttime > client_p->localClient->since)
342	>	client_p->localClient->since = CurrentTime;
343		ClearPingSent(client_p);
344
464	–	dbuf_put(&client_p->localClient->buf_recvq, readBuf, length);
465	–
345		/* Attempt to parse what we have */
346		parse_client_queued(client_p);
347
#	Line 470 | Line 349 | read_packet(fde_t *fd, void *data)
349		return;
350
351		/* Check to make sure we're not flooding */
473	–	/* 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 && IsOper(client_p)))
356	>	if (!(ConfigFileEntry.no_oper_flood && HasUMode(client_p, UMODE_OPER)))
357		{
358		exit_client(client_p, client_p, "Excess Flood");
359		return;
#	Line 507 | 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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