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

Comparing:
ircd-hybrid/src/packet.c (file contents), Revision 1028 by michael, Sun Nov 8 13:03:38 2009 UTC vs.
ircd-hybrid/trunk/src/packet.c (file contents), Revision 3453 by michael, Thu May 1 19:31:11 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"
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"
34		#include "parse.h"
35		#include "fdlist.h"
36		#include "packet.h"
37		#include "irc_string.h"
38		#include "memory.h"
37	–	#include "hook.h"
39		#include "send.h"
40	<	#include "irc_getnameinfo.h"
40	>	#include "misc.h"
41
42		#define READBUF_SIZE 16384
43
43	–	struct Callback *iorecv_cb = NULL;
44	–	struct Callback *iorecvctrl_cb = NULL;
45	–
44		static char readBuf[READBUF_SIZE];
45		static void client_dopacket(struct Client *, char *, size_t);
46
#	Line 56 | Line 54 | static void client_dopacket(struct Clien
54		static int
55		extract_one_line(struct dbuf_queue *qptr, char *buffer)
56		{
59	–	struct dbuf_block *block;
57		int line_bytes = 0, empty_bytes = 0, phase = 0;
58	<	unsigned int idx;
59	<
63	<	char c;
64	<	dlink_node *ptr;
58	>	unsigned int idx = 0;
59	>	dlink_node *ptr = NULL;
60
61		/*
62		* Phase 0: "empty" characters before the line
#	Line 77 | Line 72 | extract_one_line(struct dbuf_queue *qptr
72		*/
73		DLINK_FOREACH(ptr, qptr->blocks.head)
74		{
75	<	block = ptr->data;
75	>	struct dbuf_block *block = ptr->data;
76
77	<	for (idx = 0; idx < block->size; idx++)
77	>	if (ptr == qptr->blocks.head)
78	>	idx = qptr->pos;
79	>	else
80	>	idx = 0;
81	>
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 114 | 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		}
117	–
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 129 | Line 130 | parse_client_queued(struct Client *clien
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)
#	Line 140 | 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 148 | Line 149 | parse_client_queued(struct Client *clien
149		/* if they've dropped out of the unknown state, break and move
150		* to the parsing for their appropriate status.  --fl
151		*/
152	<	if(!IsUnknown(client_p))
152	>	if (!IsUnknown(client_p))
153		break;
154		}
155		}
#	Line 159 | Line 160 | parse_client_queued(struct Client *clien
160		{
161		if (IsDefunct(client_p))
162		return;
163	<	if ((dolen = extract_one_line(&lclient_p->buf_recvq,
163	<	readBuf)) == 0)
163	>	if ((dolen = extract_one_line(&lclient_p->buf_recvq, readBuf)) == 0)
164		break;
165	+
166		client_dopacket(client_p, readBuf, dolen);
167		}
168		}
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 180 | 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	>	while (1)
185		{
186		if (IsDefunct(client_p))
187	<	break;
187	>	break;
188
189		/* This flood protection works as follows:
190		*
#	Line 200 | Line 201 | parse_client_queued(struct Client *clien
201		*/
202		if (checkflood > 0)
203		{
204	<	if(lclient_p->sent_parsed >= lclient_p->allow_read)
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		*/
211	<	else if (lclient_p->sent_parsed >= (4 * lclient_p->allow_read) &&
211	<	checkflood != -1)
211	>	else if (lclient_p->sent_parsed >= (4 * lclient_p->allow_read) && checkflood != -1)
212		break;
213
214		dolen = extract_one_line(&lclient_p->buf_recvq, readBuf);
#	Line 250 | Line 250 | flood_recalc(fde_t *fd, void *data)
250		{
251		struct Client *client_p = data;
252		struct LocalUser *lclient_p = client_p->localClient;
253	<
253	>
254		/* allow a bursting client their allocation per second, allow
255		* a client whos flooding an extra 2 per second
256		*/
#	Line 258 | Line 258 | flood_recalc(fde_t *fd, void *data)
258		lclient_p->sent_parsed -= 2;
259		else
260		lclient_p->sent_parsed = 0;
261	<
261	>
262		if (lclient_p->sent_parsed < 0)
263		lclient_p->sent_parsed = 0;
264	<
264	>
265		parse_client_queued(client_p);
266	<
266	>
267		/* And now, try flushing .. */
268		if (!IsDead(client_p))
269		{
#	Line 273 | Line 273 | flood_recalc(fde_t *fd, void *data)
273		}
274
275		/*
276	–	* read_ctrl_packet - Read a 'packet' of data from a servlink control
277	–	*                    link and process it.
278	–	*/
279	–	void
280	–	read_ctrl_packet(fde_t *fd, void *data)
281	–	{
282	–	struct Client *server = data;
283	–	struct LocalUser *lserver = server->localClient;
284	–	struct SlinkRpl *reply;
285	–	int length = 0;
286	–	unsigned char tmp[2];
287	–	unsigned char *len = tmp;
288	–	struct SlinkRplDef *replydef;
289	–
290	–	assert(lserver != NULL);
291	–
292	–	reply = &lserver->slinkrpl;
293	–
294	–	if (IsDefunct(server))
295	–	return;
296	–
297	–	if (!reply->command)
298	–	{
299	–	reply->gotdatalen = 0;
300	–	reply->readdata = 0;
301	–	reply->data = NULL;
302	–
303	–	length = recv(fd->fd, tmp, 1, 0);
304	–
305	–	if (length <= 0)
306	–	{
307	–	if ((length == -1) && ignoreErrno(errno))
308	–	goto nodata;
309	–	dead_link_on_read(server, length);
310	–	return;
311	–	}
312	–	reply->command = tmp[0];
313	–	}
314	–
315	–	for (replydef = slinkrpltab; replydef->handler; replydef++)
316	–	{
317	–	if (replydef->replyid == (unsigned int)reply->command)
318	–	break;
319	–	}
320	–
321	–	/* we should be able to trust a local slink process...
322	–	* and if it sends an invalid command, that's a bug.. */
323	–	assert(replydef->handler);
324	–
325	–	if ((replydef->flags & SLINKRPL_FLAG_DATA) && (reply->gotdatalen < 2))
326	–	{
327	–	/* we need a datalen u16 which we don't have yet... */
328	–	length = recv(fd->fd, len, (2 - reply->gotdatalen), 0);
329	–	if (length <= 0)
330	–	{
331	–	if ((length == -1) && ignoreErrno(errno))
332	–	goto nodata;
333	–	dead_link_on_read(server, length);
334	–	return;
335	–	}
336	–
337	–	if (reply->gotdatalen == 0)
338	–	{
339	–	reply->datalen = *len << 8;
340	–	reply->gotdatalen++;
341	–	length--;
342	–	len++;
343	–	}
344	–	if (length && (reply->gotdatalen == 1))
345	–	{
346	–	reply->datalen |= *len;
347	–	reply->gotdatalen++;
348	–	if (reply->datalen > 0)
349	–	reply->data = MyMalloc(reply->datalen);
350	–	}
351	–
352	–	if (reply->gotdatalen < 2)
353	–	return; /* wait for more data */
354	–	}
355	–
356	–	if (reply->readdata < reply->datalen) /* try to get any remaining data */
357	–	{
358	–	length = recv(fd->fd, (reply->data + reply->readdata),
359	–	(reply->datalen - reply->readdata), 0);
360	–	if (length <= 0)
361	–	{
362	–	if ((length == -1) && ignoreErrno(errno))
363	–	goto nodata;
364	–	dead_link_on_read(server, length);
365	–	return;
366	–	}
367	–
368	–	reply->readdata += length;
369	–	if (reply->readdata < reply->datalen)
370	–	return; /* wait for more data */
371	–	}
372	–
373	–	execute_callback(iorecvctrl_cb, server, reply->command);
374	–
375	–	/* we now have the command and any data, pass it off to the handler */
376	–	(*replydef->handler)(reply->command, reply->datalen, reply->data, server);
377	–
378	–	/* reset SlinkRpl */
379	–	if (reply->datalen > 0)
380	–	MyFree(reply->data);
381	–	reply->command = 0;
382	–
383	–	if (IsDead(server))
384	–	return;
385	–
386	–	nodata:
387	–	/* If we get here, we need to register for another COMM_SELECT_READ */
388	–	comm_setselect(fd, COMM_SELECT_READ, read_ctrl_packet, server, 0);
389	–	}
390	–
391	–	/*
392	–	* iorecv_default - append a packet to the recvq dbuf
393	–	*/
394	–	void *
395	–	iorecv_default(va_list args)
396	–	{
397	–	struct Client *client_p = va_arg(args, struct Client *);
398	–	int length = va_arg(args, int);
399	–	char *buf = va_arg(args, char *);
400	–
401	–	dbuf_put(&client_p->localClient->buf_recvq, buf, length);
402	–	return NULL;
403	–	}
404	–
405	–	/*
276		* read_packet - Read a 'packet' of data from a connection and process it.
277		*/
278		void
#	Line 419 | Line 289 | read_packet(fde_t *fd, void *data)
289		* I personally think it makes the code too hairy to make sane.
290		*     -- adrian
291		*/
292	<	do {
292	>	do
293	>	{
294		#ifdef HAVE_LIBCRYPTO
295		if (fd->ssl)
296		{
297	<	length = SSL_read(fd->ssl, readBuf, READBUF_SIZE);
297	>	length = SSL_read(fd->ssl, readBuf, sizeof(readBuf));
298
299		/* translate openssl error codes, sigh */
300		if (length < 0)
301		switch (SSL_get_error(fd->ssl, length))
302	<	{
302	>	{
303		case SSL_ERROR_WANT_WRITE:
304	<	fd->flags.pending_read = 1;
305	<	SetSendqBlocked(client_p);
306	<	comm_setselect(fd, COMM_SELECT_WRITE, (PF *) sendq_unblocked,
307	<	client_p, 0);
437	<	return;
438	<	case SSL_ERROR_WANT_READ:
439	<	errno = EWOULDBLOCK;
304	>	comm_setselect(fd, COMM_SELECT_WRITE, (PF *)sendq_unblocked, client_p, 0);
305	>	return;
306	>	case SSL_ERROR_WANT_READ:
307	>	errno = EWOULDBLOCK;
308		case SSL_ERROR_SYSCALL:
309	<	break;
309	>	break;
310		case SSL_ERROR_SSL:
311		if (errno == EAGAIN)
312		break;
313		default:
314	<	length = errno = 0;
315	<	}
314	>	length = errno = 0;
315	>	}
316		}
317		else
318		#endif
319		{
320	<	length = recv(fd->fd, readBuf, READBUF_SIZE, 0);
320	>	length = recv(fd->fd, readBuf, sizeof(readBuf), 0);
321		}
322
323		if (length <= 0)
#	Line 465 | Line 333 | read_packet(fde_t *fd, void *data)
333		return;
334		}
335
336	<	execute_callback(iorecv_cb, client_p, length, readBuf);
336	>	dbuf_put(&client_p->localClient->buf_recvq, readBuf, length);
337	>
338	>	if (client_p->localClient->lasttime < CurrentTime)
339	>	client_p->localClient->lasttime = CurrentTime;
340	>	if (client_p->localClient->lasttime > client_p->localClient->since)
341	>	client_p->localClient->since = CurrentTime;
342
470	–	if (client_p->lasttime < CurrentTime)
471	–	client_p->lasttime = CurrentTime;
472	–	if (client_p->lasttime > client_p->since)
473	–	client_p->since = CurrentTime;
343		ClearPingSent(client_p);
344
345		/* Attempt to parse what we have */
#	Line 480 | Line 349 | read_packet(fde_t *fd, void *data)
349		return;
350
351		/* Check to make sure we're not flooding */
483	–	/* 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");
358	>	exit_client(client_p, "Excess Flood");
359		return;
360		}
361		}
#	Line 517 | 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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