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Comparing ircd-hybrid/trunk/src/parse.c (file contents):
Revision 3632 by michael, Fri May 23 18:39:59 2014 UTC vs.
Revision 8715 by michael, Sun Dec 9 20:17:02 2018 UTC

#	Line 1 | Line 1
1		/*
2		*  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3		*
4	<	*  Copyright (c) 1997-2014 ircd-hybrid development team
4	>	*  Copyright (c) 1997-2018 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 15 | 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
20		*/
21
#	Line 29 | Line 29
29		#include "parse.h"
30		#include "channel.h"
31		#include "hash.h"
32	+	#include "id.h"
33		#include "irc_string.h"
34		#include "ircd.h"
35		#include "numeric.h"
#	Line 38 | Line 39
39		#include "memory.h"
40		#include "user.h"
41		#include "server.h"
42	+	#include "packet.h"
43
44
45		/*
#	Line 72 | Line 74
74		* Diane Bruce (Dianora), June 6 2003
75		*/
76
77	<	#define MAXPTRLEN 32
78	<	/* Must be a power of 2, and
79	<	* larger than 26 [a-z]|[A-Z]
80	<	* its used to allocate the set
81	<	* of pointers at each node of the tree
82	<	* There are MAXPTRLEN pointers at each node.
83	<	* Obviously, there have to be more pointers
84	<	* Than ASCII letters. 32 is a nice number
85	<	* since there is then no need to shift
86	<	* 'A'/'a' to base 0 index, at the expense
87	<	* of a few never used pointers. For a small
86	<	* parser like this, this is a good compromise
87	<	* and does make it somewhat faster.
88	<	*
89	<	* - Dianora
90	<	*/
77	>	/*
78	>	* Must be a power of 2, and larger than 26 [a-z]|[A-Z]. It's used to allocate
79	>	* the set of pointers at each node of the tree.
80	>	* There are MAXPTRLEN pointers at each node. Obviously, there have to be more
81	>	* pointers than ASCII letters. 32 is a nice number since there is then no need
82	>	* to shift 'A'/'a' to base 0 index, at the expense of a few never used
83	>	* pointers.
84	>	* For a small parser like this, this is a good compromise and does
85	>	* make it somewhat faster. - Dianora
86	>	*/
87	>	enum { MAXPTRLEN = 32 };
88
89	<	struct MessageTree
89	>
90	>	static struct MessageTree
91		{
92		int links; /* Count of all pointers (including msg) at this node
93		* used as reference count for deletion of _this_ node.
94		*/
95		struct Message *msg;
96		struct MessageTree *pointers[MAXPTRLEN];
97	<	};
97	>	} msg_tree;
98
101	–	static struct MessageTree msg_tree;
99
100	<	static char *para[MAXPARA + 2]; /* <command> + <parameters> + NULL */
100	>	/* remove_unknown()
101	>	*
102	>	* inputs       -
103	>	* output       -
104	>	* side effects -
105	>	*/
106	>	static void
107	>	parse_remove_unknown(struct Client *client_p, const char *lsender, char *lbuffer)
108	>	{
109	>	/*
110	>	* Do kill if it came from a server because it means there is a ghost
111	>	* user on the other server which needs to be removed. -avalon
112	>	* Tell opers about this. -Taner
113	>	*/
114	>	/*
115	>	* '[0-9]something'  is an ID      (KILL/SQUIT depending on its length)
116	>	* 'nodots'          is a nickname (KILL)
117	>	* 'no.dot.at.start' is a server   (SQUIT)
118	>	*/
119	>	if ((IsDigit(*lsender) && strlen(lsender) <= IRC_MAXSID) || strchr(lsender, '.'))
120	>	{
121	>	sendto_realops_flags(UMODE_DEBUG, L_ADMIN, SEND_NOTICE,
122	>	"Unknown prefix (%s) from %s, Squitting %s",
123	>	lbuffer, client_get_name(client_p, SHOW_IP), lsender);
124	>	sendto_realops_flags(UMODE_DEBUG, L_OPER, SEND_NOTICE,
125	>	"Unknown prefix (%s) from %s, Squitting %s",
126	>	lbuffer, client_get_name(client_p, MASK_IP), lsender);
127	>	sendto_one(client_p, ":%s SQUIT %s :(Unknown prefix (%s) from %s)",
128	>	me.id, lsender, lbuffer, client_p->name);
129	>	}
130	>	else
131	>	sendto_one(client_p, ":%s KILL %s :%s (Unknown Client)",
132	>	me.id, lsender, me.name);
133	>	}
134
135	<	static int cancel_clients(struct Client *, struct Client *, char *);
136	<	static void remove_unknown(struct Client *, char *, char *);
137	<	static void handle_numeric(unsigned int, struct Client *, int, char *[]);
138	<	static void handle_command(struct Message *, struct Client *, unsigned int, char *[]);
135	>	/*
136	>	*
137	>	*      parc    number of arguments ('sender' counted as one!)
138	>	*      parv[0] pointer to 'sender' (may point to empty string) (not used)
139	>	*      parv[1]..parv[parc-1]
140	>	*              pointers to additional parameters, this is a NULL
141	>	*              terminated list (parv[parc] == NULL).
142	>	*
143	>	* *WARNING*
144	>	*      Numerics are mostly error reports. If there is something
145	>	*      wrong with the message, just *DROP* it! Don't even think of
146	>	*      sending back a neat error message -- big danger of creating
147	>	*      a ping pong error message...
148	>	*
149	>	* Rewritten by Nemesi, Jan 1999, to support numeric nicks in parv[1]
150	>	*
151	>	* Called when we get a numeric message from a remote _server_ and we are
152	>	* supposed to forward it somewhere. Note that we always ignore numerics sent
153	>	* to 'me' and simply drop the message if we can't handle with this properly:
154	>	* the savvy approach is NEVER generate an error in response to an... error :)
155	>	*/
156	>	static void
157	>	parse_handle_numeric(unsigned int numeric, struct Client *source_p, int parc, char *parv[])
158	>	{
159	>	struct Client *target_p = NULL;
160	>	struct Channel *chptr = NULL;
161
162	+	/*
163	+	* Avoid trash, we need it to come from a server and have a target
164	+	*/
165	+	if (parc < 2 || !IsServer(source_p))
166	+	return;
167	+
168	+	/*
169	+	* Who should receive this message ? Will we do something with it ?
170	+	* Note that we use findUser functions, so the target can't be neither
171	+	* a server, nor a channel (?) nor a list of targets (?) .. u2.10
172	+	* should never generate numeric replies to non-users anyway
173	+	* Ahem... it can be a channel actually, csc bots use it :\ --Nem
174	+	*/
175	+	if (IsChanPrefix(*parv[1]))
176	+	chptr = hash_find_channel(parv[1]);
177	+	else
178	+	target_p = find_person(source_p, parv[1]);
179	+
180	+	if ((target_p == NULL || target_p->from == source_p->from) && chptr == NULL)
181	+	return;
182	+
183	+	/*
184	+	* Remap low number numerics, not that I understand WHY.. --Nemesi
185	+	*/
186	+	/*
187	+	* Numerics below 100 talk about the current 'connection', you're not
188	+	* connected to a remote server so it doesn't make sense to send them
189	+	* remotely - but the information they contain may be useful, so we
190	+	* remap them up. Weird, but true.  -- Isomer
191	+	*/
192	+	if (numeric < 100)
193	+	numeric += 100;
194	+
195	+	if (target_p)
196	+	{
197	+	/* Fake it for server hiding, if it's our client */
198	+	if ((ConfigServerHide.hide_servers || IsHidden(source_p)) && MyConnect(target_p) &&
199	+	!HasUMode(target_p, UMODE_OPER))
200	+	sendto_one_numeric(target_p, &me, numeric | SND_EXPLICIT, "%s", parv[2]);
201	+	else
202	+	sendto_one_numeric(target_p, source_p, numeric | SND_EXPLICIT, "%s", parv[2]);
203	+	}
204	+	else
205	+	sendto_channel_butone(source_p, source_p, chptr, 0, "%u %s %s",
206	+	numeric, chptr->name, parv[2]);
207	+	}
208	+
209	+	/* handle_command()
210	+	*
211	+	* inputs       - pointer to message block
212	+	*              - pointer to client
213	+	*              - pointer to client message is from
214	+	*              - count of number of args
215	+	*              - pointer to argv[] array
216	+	* output       - -1 if error from server
217	+	* side effects -
218	+	*/
219	+	static void
220	+	parse_handle_command(struct Message *message, struct Client *source_p,
221	+	unsigned int i, char *para[])
222	+	{
223	+	if (IsServer(source_p->from))
224	+	++message->rcount;
225	+	++message->count;
226	+
227	+	if (MyClient(source_p) && (message->flags & MFLG_ENDGRACE))
228	+	flood_endgrace(source_p);
229	+
230	+	/* Check right amount of parameters is passed... --is */
231	+	if (i < message->args_min)
232	+	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, message->cmd);
233	+	else
234	+	message->handlers[source_p->from->handler](source_p, i, para);
235	+	}
236
237		/*
238		* parse a buffer.
#	Line 117 | Line 243 | void
243		parse(struct Client *client_p, char *pbuffer, char *bufend)
244		{
245		struct Client *from = client_p;
246	<	struct Message *msg_ptr = NULL;
246	>	struct Message *message = NULL;
247	>	char *para[MAXPARA + 2];  /* <command> + <parameters> + NULL */
248		char *ch = NULL;
249		char *s = NULL;
250		unsigned int numeric = 0;
#	Line 127 | Line 254 | parse(struct Client *client_p, char *pbu
254		if (IsDefunct(client_p))
255		return;
256
257	<	assert(client_p->localClient->fd.flags.open);
257	>	assert(client_p->connection);
258	>	assert(client_p->connection->fd);
259	>	assert(client_p->connection->fd->flags.open);
260	>
261	>
262		assert((bufend - pbuffer) < IRCD_BUFSIZE);
263
264		for (ch = pbuffer; *ch == ' '; ++ch)  /* Skip spaces */
#	Line 139 | Line 270 | parse(struct Client *client_p, char *pbu
270		* Copy the prefix to 'sender' assuming it terminates
271		* with SPACE (or NULL, which is an error, though).
272		*/
273	<	char *sender = ++ch;
273	>	const char *const sender = ++ch;
274
275		if ((s = strchr(ch, ' ')))
276		{
#	Line 149 | Line 280 | parse(struct Client *client_p, char *pbu
280
281		if (*sender && IsServer(client_p))
282		{
283	<	if ((from = find_person(client_p, sender)) == NULL)
284	<	from = hash_find_server(sender);
283	>	if ((from = hash_find_id(sender)) == NULL)
284	>	from = hash_find_client(sender);
285
286		/*
287		* Hmm! If the client corresponding to the prefix is not found--what is
#	Line 160 | Line 291 | parse(struct Client *client_p, char *pbu
291		if (from == NULL)
292		{
293		++ServerStats.is_unpf;
294	<	remove_unknown(client_p, sender, pbuffer);
294	>	parse_remove_unknown(client_p, sender, pbuffer);
295		return;
296		}
297
298		if (from->from != client_p)
299		{
300		++ServerStats.is_wrdi;
301	<	cancel_clients(client_p, from, pbuffer);
301	>	sendto_realops_flags(UMODE_DEBUG, L_ADMIN, SEND_NOTICE,
302	>	"Fake direction: dropped message from %s[%s] via %s",
303	>	from->name, from->from->name,
304	>	client_get_name(client_p, SHOW_IP));
305	>	sendto_realops_flags(UMODE_DEBUG, L_OPER, SEND_NOTICE,
306	>	"Fake direction: dropped message from %s[%s] via %s",
307	>	from->name, from->from->name,
308	>	client_get_name(client_p, MASK_IP));
309		return;
310		}
311		}
#	Line 191 | Line 329 | parse(struct Client *client_p, char *pbu
329		*/
330
331		/* EOB is 3 characters long but is not a numeric */
332	<	if (*(ch + 3) == ' ' &&  /* Ok, lets see if its a possible numeric.. */
332	>	if (*(ch + 3) == ' ' &&  /* Ok, let's see if it's a possible numeric */
333		IsDigit(*ch) && IsDigit(*(ch + 1)) && IsDigit(*(ch + 2)))
334		{
335		numeric = (*ch - '0') * 100 + (*(ch + 1) - '0') * 10 + (*(ch + 2) - '0');
#	Line 202 | Line 340 | parse(struct Client *client_p, char *pbu
340		}
341		else
342		{
205	–	unsigned int ii = 0;
206	–
343		if ((s = strchr(ch, ' ')))
344		*s++ = '\0';
345
346	<	if ((msg_ptr = find_command(ch)) == NULL)
346	>	if ((message = find_command(ch)) == NULL)
347		{
348		/*
349		* Note: Give error message *only* to recognized
#	Line 228 | Line 364 | parse(struct Client *client_p, char *pbu
364		return;
365		}
366
367	<	assert(msg_ptr->cmd);
367	>	assert(message->cmd);
368
369	<	paramcount = msg_ptr->args_max;
370	<	ii = bufend - ((s) ? s : ch);
371	<	msg_ptr->bytes += ii;
369	>	paramcount = message->args_max;
370	>
371	>	size_t length = bufend - ((s) ? s : ch);
372	>	message->bytes += length;
373		}
374
375		/*
#	Line 246 | Line 383 | parse(struct Client *client_p, char *pbu
383
384		para[parc] = ch;
385
386	+	if (message && (message->flags & MFLG_EXTRA))
387	+	{
388	+	/*
389	+	* XXX: This will have to go away after the command handler rewrite
390	+	*/
391	+	para[++parc] = message->extra;
392	+	}
393	+
394		if (s)
395		{
396		if (paramcount > MAXPARA)
397		paramcount = MAXPARA;
398
399	<	while (1)
399	>	while (true)
400		{
401		while (*s == ' ')
402		*s++ = '\0';
#	Line 261 | Line 406 | parse(struct Client *client_p, char *pbu
406
407		if (*s == ':')
408		{
409	<	/* The rest is a single parameter */
410	<	para[++parc] = s + (!numeric);  /* Keep the colon if it's a numeric */
409	>	/* The rest is single parameter--can include blanks also. */
410	>	para[++parc] = s + (numeric == 0);  /* Keep the colon if it's a numeric */
411		break;
412		}
413
#	Line 278 | Line 423 | parse(struct Client *client_p, char *pbu
423
424		para[++parc] = NULL;
425
426	<	if (msg_ptr)
427	<	handle_command(msg_ptr, from, parc, para);
283	<	else
284	<	handle_numeric(numeric, from, parc, para);
285	<	}
286	<
287	<	/* handle_command()
288	<	*
289	<	* inputs       - pointer to message block
290	<	*              - pointer to client
291	<	*              - pointer to client message is from
292	<	*              - count of number of args
293	<	*              - pointer to argv[] array
294	<	* output       - -1 if error from server
295	<	* side effects -
296	<	*/
297	<	static void
298	<	handle_command(struct Message *mptr, struct Client *source_p,
299	<	unsigned int i, char *hpara[])
300	<	{
301	<	if (IsServer(source_p->from))
302	<	++mptr->rcount;
303	<
304	<	++mptr->count;
305	<
306	<	/* Check right amount of parameters is passed... --is */
307	<	if (i < mptr->args_min)
308	<	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, mptr->cmd);
426	>	if (message)
427	>	parse_handle_command(message, from, parc, para);
428		else
429	<	mptr->handlers[source_p->from->handler](source_p, i, hpara);
429	>	parse_handle_numeric(numeric, from, parc, para);
430		}
431
432		/* add_msg_element()
#	Line 351 | Line 470 | add_msg_element(struct MessageTree *mtre
470		*/
471		if ((ntree_p = mtree_p->pointers[*cmd & (MAXPTRLEN - 1)]) == NULL)
472		{
473	<	ntree_p = MyCalloc(sizeof(struct MessageTree));
473	>	ntree_p = xcalloc(sizeof(*ntree_p));
474		mtree_p->pointers[*cmd & (MAXPTRLEN - 1)] = ntree_p;
475
476		mtree_p->links++;  /* Have new pointer, so up ref count */
#	Line 379 | Line 498 | add_msg_element(struct MessageTree *mtre
498		*
499		* Then it pops up the recurse stack. As it comes back up the recurse
500		* The code checks to see if the child now has no pointers or msg
501	<	* i.e. the links count has gone to zero. If its no longer used, the
501	>	* i.e. the links count has gone to zero. If it's no longer used, the
502		* child struct MessageTree can be deleted. The parent reference
503		* to this child is then removed and the parents link count goes down.
504		* Thus, we continue to go back up removing all unused MessageTree(s)
#	Line 409 | Line 528 | del_msg_element(struct MessageTree *mtre
528		{
529		mtree_p->pointers[*cmd & (MAXPTRLEN - 1)] = NULL;
530		mtree_p->links--;
531	<	MyFree(ntree_p);
531	>	xfree(ntree_p);
532		}
533		}
534		}
#	Line 427 | Line 546 | msg_tree_parse(const char *cmd)
546		{
547		struct MessageTree *mtree = &msg_tree;
548
549	<	assert(cmd && *cmd);
549	>	assert(!EmptyString(cmd));
550
551		while (IsAlpha(*cmd) && (mtree = mtree->pointers[*cmd & (MAXPTRLEN - 1)]))
552		if (*++cmd == '\0')
#	Line 441 | Line 560 | msg_tree_parse(const char *cmd)
560		* inputs       - pointer to struct Message
561		* output       - none
562		* side effects - load this one command name
444	–	*                msg->count msg->bytes is modified in place, in
445	–	*                modules address space. Might not want to do that...
563		*/
564		void
565		mod_add_cmd(struct Message *msg)
566		{
567	<	assert(msg && msg->cmd);
567	>	assert(msg);
568	>	assert(msg->cmd);
569
570		/* Command already added? */
571	<	if (msg_tree_parse(msg->cmd))
572	<	return;
455	<
456	<	add_msg_element(&msg_tree, msg, msg->cmd);
457	<	msg->count = msg->rcount = msg->bytes = 0;
571	>	if (msg_tree_parse(msg->cmd) == NULL)
572	>	add_msg_element(&msg_tree, msg, msg->cmd);
573		}
574
575		/* mod_del_cmd()
#	Line 466 | Line 581 | mod_add_cmd(struct Message *msg)
581		void
582		mod_del_cmd(struct Message *msg)
583		{
584	<	assert(msg && msg->cmd);
585	<
471	<	if (!msg_tree_parse(msg->cmd))
472	<	return;
584	>	assert(msg);
585	>	assert(msg->cmd);
586
587	<	del_msg_element(&msg_tree, msg->cmd);
587	>	if (msg_tree_parse(msg->cmd))
588	>	del_msg_element(&msg_tree, msg->cmd);
589		}
590
591		/* find_command()
#	Line 509 | Line 623 | recurse_report_messages(struct Client *s
623		void
624		report_messages(struct Client *source_p)
625		{
626	<	const struct MessageTree *mtree = &msg_tree;
626	>	const struct MessageTree *const mtree = &msg_tree;
627
628		for (unsigned int i = 0; i < MAXPTRLEN; ++i)
629		if (mtree->pointers[i])
630		recurse_report_messages(source_p, mtree->pointers[i]);
631		}
632
519	–	/* cancel_clients()
520	–	*
521	–	* inputs       -
522	–	* output       -
523	–	* side effects -
524	–	*/
525	–	static int
526	–	cancel_clients(struct Client *client_p, struct Client *source_p, char *cmd)
527	–	{
528	–	/*
529	–	* Kill all possible points that are causing confusion here,
530	–	* I'm not sure I've got this all right...
531	–	* - avalon
532	–	*
533	–	* Knowing avalon, probably not.
534	–	*/
535	–
536	–	/*
537	–	* With TS, fake prefixes are a common thing, during the
538	–	* connect burst when there's a nick collision, and they
539	–	* must be ignored rather than killed because one of the
540	–	* two is surviving.. so we don't bother sending them to
541	–	* all ops everytime, as this could send 'private' stuff
542	–	* from lagged clients. we do send the ones that cause
543	–	* servers to be dropped though, as well as the ones from
544	–	* non-TS servers -orabidoo
545	–	*/
546	–	/*
547	–	* Incorrect prefix for a server from some connection. If it is a
548	–	* client trying to be annoying, just QUIT them, if it is a server
549	–	* then the same deal.
550	–	*/
551	–	if (IsServer(source_p) || IsMe(source_p))
552	–	{
553	–	sendto_realops_flags(UMODE_DEBUG, L_ADMIN, SEND_NOTICE,
554	–	"Message for %s[%s] from %s",
555	–	source_p->name, source_p->from->name,
556	–	get_client_name(client_p, SHOW_IP));
557	–	sendto_realops_flags(UMODE_DEBUG, L_OPER, SEND_NOTICE,
558	–	"Message for %s[%s] from %s",
559	–	source_p->name, source_p->from->name,
560	–	get_client_name(client_p, MASK_IP));
561	–	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
562	–	"Not dropping server %s (%s) for Fake Direction",
563	–	client_p->name, source_p->name);
564	–	return -1;
565	–	/* return exit_client(client_p, client_p, &me, "Fake Direction");*/
566	–	}
567	–
568	–	/*
569	–	* Ok, someone is trying to impose as a client and things are
570	–	* confused. If we got the wrong prefix from a server, send out a
571	–	* kill, else just exit the lame client.
572	–	*/
573	–	/*
574	–	* If the fake prefix is coming from a TS server, discard it
575	–	* silently -orabidoo
576	–	*
577	–	* all servers must be TS these days --is
578	–	*/
579	–	sendto_realops_flags(UMODE_DEBUG, L_ADMIN, SEND_NOTICE,
580	–	"Message for %s[%s@%s!%s] from %s (TS, ignored)",
581	–	source_p->name, source_p->username, source_p->host,
582	–	source_p->from->name, get_client_name(client_p, SHOW_IP));
583	–	sendto_realops_flags(UMODE_DEBUG, L_OPER, SEND_NOTICE,
584	–	"Message for %s[%s@%s!%s] from %s (TS, ignored)",
585	–	source_p->name, source_p->username, source_p->host,
586	–	source_p->from->name, get_client_name(client_p, MASK_IP));
587	–	return 0;
588	–	}
589	–
590	–	/* remove_unknown()
591	–	*
592	–	* inputs       -
593	–	* output       -
594	–	* side effects -
595	–	*/
596	–	static void
597	–	remove_unknown(struct Client *client_p, char *lsender, char *lbuffer)
598	–	{
599	–	/*
600	–	* Do kill if it came from a server because it means there is a ghost
601	–	* user on the other server which needs to be removed. -avalon
602	–	* Tell opers about this. -Taner
603	–	*/
604	–	/*
605	–	* '[0-9]something'  is an ID      (KILL/SQUIT depending on its length)
606	–	* 'nodots'          is a nickname (KILL)
607	–	* 'no.dot.at.start' is a server   (SQUIT)
608	–	*/
609	–	if ((IsDigit(*lsender) && strlen(lsender) <= IRC_MAXSID) || strchr(lsender, '.'))
610	–	{
611	–	sendto_realops_flags(UMODE_DEBUG, L_ADMIN, SEND_NOTICE,
612	–	"Unknown prefix (%s) from %s, Squitting %s",
613	–	lbuffer, get_client_name(client_p, SHOW_IP), lsender);
614	–	sendto_realops_flags(UMODE_DEBUG, L_OPER, SEND_NOTICE,
615	–	"Unknown prefix (%s) from %s, Squitting %s",
616	–	lbuffer, client_p->name, lsender);
617	–	sendto_one(client_p, ":%s SQUIT %s :(Unknown prefix (%s) from %s)",
618	–	me.id, lsender, lbuffer, client_p->name);
619	–	}
620	–	else
621	–	sendto_one(client_p, ":%s KILL %s :%s (Unknown Client)",
622	–	me.id, lsender, me.name);
623	–	}
624	–
625	–	/*
626	–	*
627	–	*      parc    number of arguments ('sender' counted as one!)
628	–	*      parv[0] pointer to 'sender' (may point to empty string) (not used)
629	–	*      parv[1]..parv[parc-1]
630	–	*              pointers to additional parameters, this is a NULL
631	–	*              terminated list (parv[parc] == NULL).
632	–	*
633	–	* *WARNING*
634	–	*      Numerics are mostly error reports. If there is something
635	–	*      wrong with the message, just *DROP* it! Don't even think of
636	–	*      sending back a neat error message -- big danger of creating
637	–	*      a ping pong error message...
638	–	*
639	–	* Rewritten by Nemesi, Jan 1999, to support numeric nicks in parv[1]
640	–	*
641	–	* Called when we get a numeric message from a remote _server_ and we are
642	–	* supposed to forward it somewhere. Note that we always ignore numerics sent
643	–	* to 'me' and simply drop the message if we can't handle with this properly:
644	–	* the savvy approach is NEVER generate an error in response to an... error :)
645	–	*/
646	–	static void
647	–	handle_numeric(unsigned int numeric, struct Client *source_p, int parc, char *parv[])
648	–	{
649	–	struct Client *target_p = NULL;
650	–	struct Channel *chptr = NULL;
651	–
652	–	/*
653	–	* Avoid trash, we need it to come from a server and have a target
654	–	*/
655	–	if (parc < 2 || !IsServer(source_p))
656	–	return;
657	–
658	–	/*
659	–	* Who should receive this message ? Will we do something with it ?
660	–	* Note that we use findUser functions, so the target can't be neither
661	–	* a server, nor a channel (?) nor a list of targets (?) .. u2.10
662	–	* should never generate numeric replies to non-users anyway
663	–	* Ahem... it can be a channel actually, csc bots use it :\ --Nem
664	–	*/
665	–	if (IsChanPrefix(*parv[1]))
666	–	chptr = hash_find_channel(parv[1]);
667	–	else
668	–	target_p = find_person(source_p, parv[1]);
669	–
670	–	if (((!target_p) || (target_p->from == source_p->from)) && !chptr)
671	–	return;
672	–
673	–	/*
674	–	* Remap low number numerics, not that I understand WHY.. --Nemesi
675	–	*/
676	–	/*
677	–	* Numerics below 100 talk about the current 'connection', you're not
678	–	* connected to a remote server so it doesn't make sense to send them
679	–	* remotely - but the information they contain may be useful, so we
680	–	* remap them up. Weird, but true.  -- Isomer
681	–	*/
682	–	if (numeric < 100)
683	–	numeric += 100;
684	–
685	–	if (target_p)
686	–	{
687	–	/* Fake it for server hiding, if it's our client */
688	–	if (ConfigServerHide.hide_servers && MyConnect(target_p) &&
689	–	!HasUMode(target_p, UMODE_OPER))
690	–	sendto_one_numeric(target_p, &me, numeric|SND_EXPLICIT, "%s", parv[2]);
691	–	else
692	–	sendto_one_numeric(target_p, source_p, numeric|SND_EXPLICIT, "%s", parv[2]);
693	–	}
694	–	else
695	–	sendto_channel_butone(source_p, source_p, chptr, 0, "%u %s %s",
696	–	numeric, chptr->chname, parv[2]);
697	–	}
698	–
633		/* m_not_oper()
634		* inputs       -
635		* output       -

Comparing ircd-hybrid/trunk/src/parse.c (property svn:keywords):
Revision 3632 by michael, Fri May 23 18:39:59 2014 UTC vs.
Revision 8715 by michael, Sun Dec 9 20:17:02 2018 UTC

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