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root/svn/ircd-hybrid/trunk/src/parse.c
Revision: 1323
Committed: Fri Mar 30 11:40:49 2012 UTC (14 years, 6 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid-8/src/parse.c
File size: 24831 byte(s)
Log Message:
- parse.c: remove unused prototypes

File Contents

# User Rev Content
1 adx 30 /*
2     * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3     * parse.c: The message parser.
4     *
5     * Copyright (C) 2002 by the past and present ircd coders, and others.
6     *
7     * This program is free software; you can redistribute it and/or modify
8     * it under the terms of the GNU General Public License as published by
9     * the Free Software Foundation; either version 2 of the License, or
10     * (at your option) any later version.
11     *
12     * This program is distributed in the hope that it will be useful,
13     * but WITHOUT ANY WARRANTY; without even the implied warranty of
14     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15     * GNU General Public License for more details.
16     *
17     * You should have received a copy of the GNU General Public License
18     * along with this program; if not, write to the Free Software
19     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20     * USA
21     *
22 knight 31 * $Id$
23 adx 30 */
24    
25     #include "stdinc.h"
26 michael 1243 #include "client.h"
27 adx 30 #include "parse.h"
28     #include "channel.h"
29     #include "hash.h"
30     #include "irc_string.h"
31     #include "sprintf_irc.h"
32     #include "ircd.h"
33     #include "numeric.h"
34 michael 1309 #include "log.h"
35 adx 30 #include "send.h"
36 michael 1309 #include "conf.h"
37 adx 30 #include "memory.h"
38     #include "s_user.h"
39     #include "s_serv.h"
40    
41     /*
42     * (based on orabidoo's parser code)
43     *
44     * This has always just been a trie. Look at volume III of Knuth ACP
45     *
46     *
47     * ok, you start out with an array of pointers, each one corresponds
48     * to a letter at the current position in the command being examined.
49     *
50     * so roughly you have this for matching 'trie' or 'tie'
51     *
52     * 't' points -> [MessageTree *] 'r' -> [MessageTree *] -> 'i'
53     * -> [MessageTree *] -> [MessageTree *] -> 'e' and matches
54     *
55     * 'i' -> [MessageTree *] -> 'e' and matches
56     *
57     * BUGS (Limitations!)
58     *
59     * I designed this trie to parse ircd commands. Hence it currently
60     * casefolds. This is trivial to fix by increasing MAXPTRLEN.
61     * This trie also "folds" '{' etc. down. This means, the input to this
62     * trie must be alpha tokens only. This again, is a limitation that
63     * can be overcome by increasing MAXPTRLEN to include upper/lower case
64     * at the expense of more memory. At the extreme end, you could make
65     * MAXPTRLEN 128.
66     *
67     * This is also not a patricia trie. On short ircd tokens, this is
68     * not likely going to matter.
69     *
70     * Diane Bruce (Dianora), June 6 2003
71     */
72    
73     #define MAXPTRLEN 32
74     /* Must be a power of 2, and
75     * larger than 26 [a-z]|[A-Z]
76     * its used to allocate the set
77     * of pointers at each node of the tree
78     * There are MAXPTRLEN pointers at each node.
79     * Obviously, there have to be more pointers
80     * Than ASCII letters. 32 is a nice number
81     * since there is then no need to shift
82     * 'A'/'a' to base 0 index, at the expense
83     * of a few never used pointers. For a small
84     * parser like this, this is a good compromise
85     * and does make it somewhat faster.
86     *
87     * - Dianora
88     */
89    
90     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     };
98    
99     static struct MessageTree msg_tree;
100    
101     /*
102     * NOTE: parse() should not be called recursively by other functions!
103     */
104     static char *sender;
105 michael 1322 static char *para[MAXPARA + 2]; /* <prefix> + <params> + NULL */
106 adx 30 static char buffer[1024];
107    
108     static int cancel_clients(struct Client *, struct Client *, char *);
109     static void remove_unknown(struct Client *, char *, char *);
110 michael 1178 static void handle_numeric(char[], struct Client *, struct Client *, int, char *[]);
111     static void handle_command(struct Message *, struct Client *, struct Client *, unsigned int, char *[]);
112 adx 30
113    
114     /*
115     * parse a buffer.
116     *
117     * NOTE: parse() should not be called recusively by any other functions!
118     */
119     void
120     parse(struct Client *client_p, char *pbuffer, char *bufend)
121     {
122     struct Client *from = client_p;
123 michael 1178 struct Message *msg_ptr = NULL;
124 michael 1246 char *ch = NULL;
125     char *s = NULL;
126     char *numeric = NULL;
127 michael 1178 unsigned int parc = 0;
128     unsigned int paramcount;
129 adx 30
130     if (IsDefunct(client_p))
131     return;
132    
133     assert(client_p->localClient->fd.flags.open);
134     assert((bufend - pbuffer) < 512);
135    
136 michael 1246 for (ch = pbuffer; *ch == ' '; ++ch) /* skip spaces */
137 adx 30 /* null statement */ ;
138    
139     if (*ch == ':')
140     {
141 michael 1178 /*
142     * Copy the prefix to 'sender' assuming it terminates
143 adx 30 * with SPACE (or NULL, which is an error, though).
144     */
145 michael 1178 sender = ++ch;
146 adx 30
147     if ((s = strchr(ch, ' ')) != NULL)
148     {
149     *s = '\0';
150 michael 1178 ch = ++s;
151 adx 30 }
152    
153     if (*sender && IsServer(client_p))
154     {
155     if ((from = find_person(client_p, sender)) == NULL)
156 michael 1169 from = hash_find_server(sender);
157 adx 30
158     /* Hmm! If the client corresponding to the
159     * prefix is not found--what is the correct
160     * action??? Now, I will ignore the message
161     * (old IRC just let it through as if the
162     * prefix just wasn't there...) --msa
163     */
164     if (from == NULL)
165     {
166 michael 896 ++ServerStats.is_unpf;
167 adx 30 remove_unknown(client_p, sender, pbuffer);
168     return;
169     }
170    
171     if (from->from != client_p)
172     {
173 michael 896 ++ServerStats.is_wrdi;
174 adx 30 cancel_clients(client_p, from, pbuffer);
175     return;
176     }
177     }
178    
179     while (*ch == ' ')
180 michael 1178 ++ch;
181 adx 30 }
182    
183     if (*ch == '\0')
184     {
185 michael 896 ++ServerStats.is_empt;
186 adx 30 return;
187     }
188    
189     /* Extract the command code from the packet. Point s to the end
190     * of the command code and calculate the length using pointer
191     * arithmetic. Note: only need length for numerics and *all*
192     * numerics must have parameters and thus a space after the command
193     * code. -avalon
194     */
195    
196     /* EOB is 3 chars long but is not a numeric */
197     if (*(ch + 3) == ' ' && /* ok, lets see if its a possible numeric.. */
198     IsDigit(*ch) && IsDigit(*(ch + 1)) && IsDigit(*(ch + 2)))
199     {
200     numeric = ch;
201     paramcount = MAXPARA;
202 michael 896 ++ServerStats.is_num;
203 adx 30 s = ch + 3; /* I know this is ' ' from above if */
204     *s++ = '\0'; /* blow away the ' ', and point s to next part */
205     }
206     else
207     {
208 michael 948 unsigned int ii = 0;
209 adx 30
210     if ((s = strchr(ch, ' ')) != NULL)
211     *s++ = '\0';
212    
213 michael 1178 if ((msg_ptr = find_command(ch)) == NULL)
214 adx 30 {
215     /* Note: Give error message *only* to recognized
216     * persons. It's a nightmare situation to have
217     * two programs sending "Unknown command"'s or
218     * equivalent to each other at full blast....
219     * If it has got to person state, it at least
220     * seems to be well behaving. Perhaps this message
221     * should never be generated, though... --msa
222     * Hm, when is the buffer empty -- if a command
223     * code has been found ?? -Armin
224     */
225 michael 1246 if (*pbuffer != '\0')
226 adx 30 {
227     if (IsClient(from))
228     sendto_one(from, form_str(ERR_UNKNOWNCOMMAND),
229     me.name, from->name, ch);
230     }
231    
232 michael 896 ++ServerStats.is_unco;
233 adx 30 return;
234     }
235    
236 michael 1178 assert(msg_ptr->cmd != NULL);
237 adx 30
238 michael 1178 paramcount = msg_ptr->args_max;
239 adx 30 ii = bufend - ((s) ? s : ch);
240 michael 1178 msg_ptr->bytes += ii;
241 adx 30 }
242    
243 michael 1178 /*
244     * Must the following loop really be so devious? On surface it
245     * splits the message to parameters from blank spaces. But, if
246     * paramcount has been reached, the rest of the message goes into
247     * this last parameter (about same effect as ":" has...) --msa
248     */
249    
250     /* Note initially true: s==NULL || *(s-1) == '\0' !! */
251    
252     para[parc] = from->name;
253    
254     if (s)
255 adx 30 {
256 michael 1178 if (paramcount > MAXPARA)
257     paramcount = MAXPARA;
258    
259     while (1)
260     {
261     while (*s == ' ')
262     *s++ = '\0';
263    
264     if (*s == '\0')
265     break;
266    
267     if (*s == ':')
268     {
269     /* The rest is a single parameter */
270     para[++parc] = s + 1;
271     break;
272     }
273    
274     para[++parc] = s;
275    
276     if (parc >= paramcount)
277     break;
278    
279     while (*s && *s != ' ')
280     ++s;
281     }
282 adx 30 }
283    
284 michael 1178 para[++parc] = NULL;
285    
286     if (msg_ptr != NULL)
287     handle_command(msg_ptr, client_p, from, parc, para);
288 adx 30 else
289 michael 1178 handle_numeric(numeric, client_p, from, parc, para);
290 adx 30 }
291    
292     /* handle_command()
293     *
294     * inputs - pointer to message block
295     * - pointer to client
296     * - pointer to client message is from
297     * - count of number of args
298     * - pointer to argv[] array
299     * output - -1 if error from server
300     * side effects -
301     */
302     static void
303     handle_command(struct Message *mptr, struct Client *client_p,
304 michael 1323 struct Client *from, unsigned int i, char *hpara[])
305 adx 30 {
306     MessageHandler handler = 0;
307    
308     if (IsServer(client_p))
309     mptr->rcount++;
310    
311     mptr->count++;
312    
313     /* New patch to avoid server flooding from unregistered connects
314     * - Pie-Man 07/27/2000 */
315     if (!IsRegistered(client_p))
316     {
317     /* if its from a possible server connection
318     * ignore it.. more than likely its a header thats sneaked through
319     */
320     if ((IsHandshake(client_p) || IsConnecting(client_p) ||
321     IsServer(client_p)) && !(mptr->flags & MFLG_UNREG))
322     return;
323     }
324    
325     handler = mptr->handlers[client_p->handler];
326    
327     /* check right amount of params is passed... --is */
328 michael 1178 if (i < mptr->args_min)
329 adx 30 {
330     if (!IsServer(client_p))
331     {
332     sendto_one(client_p, form_str(ERR_NEEDMOREPARAMS),
333     me.name, EmptyString(hpara[0]) ? "*" : hpara[0], mptr->cmd);
334     }
335     else
336     {
337     sendto_realops_flags(UMODE_ALL, L_ALL,
338     "Dropping server %s due to (invalid) command '%s' "
339     "with only %d arguments (expecting %d).",
340 michael 1178 client_p->name, mptr->cmd, i, mptr->args_min);
341 michael 1247 ilog(LOG_TYPE_IRCD, "Insufficient parameters (%d) for command '%s' from %s.",
342 adx 30 i, mptr->cmd, client_p->name);
343     exit_client(client_p, client_p,
344     "Not enough arguments to server command.");
345     }
346     }
347     else
348     (*handler)(client_p, from, i, hpara);
349     }
350    
351     /* clear_tree_parse()
352     *
353     * inputs - NONE
354     * output - NONE
355     * side effects - MUST MUST be called at startup ONCE before
356     * any other keyword routine is used.
357     */
358     void
359     clear_tree_parse(void)
360     {
361     memset(&msg_tree, 0, sizeof(msg_tree));
362     }
363    
364     /* add_msg_element()
365     *
366     * inputs - pointer to MessageTree
367     * - pointer to Message to add for given command
368     * - pointer to current portion of command being added
369     * output - NONE
370     * side effects - recursively build the Message Tree ;-)
371     */
372     /*
373     * How this works.
374     *
375     * The code first checks to see if its reached the end of the command
376     * If so, that struct MessageTree has a msg pointer updated and the links
377     * count incremented, since a msg pointer is a reference.
378     * Then the code descends recursively, building the trie.
379     * If a pointer index inside the struct MessageTree is NULL a new
380     * child struct MessageTree has to be allocated.
381     * The links (reference count) is incremented as they are created
382     * in the parent.
383     */
384     static void
385     add_msg_element(struct MessageTree *mtree_p,
386     struct Message *msg_p, const char *cmd)
387     {
388     struct MessageTree *ntree_p;
389    
390     if (*cmd == '\0')
391     {
392     mtree_p->msg = msg_p;
393     mtree_p->links++; /* Have msg pointer, so up ref count */
394     }
395     else
396     {
397     /* *cmd & (MAXPTRLEN-1)
398     * convert the char pointed to at *cmd from ASCII to an integer
399     * between 0 and MAXPTRLEN.
400     * Thus 'A' -> 0x1 'B' -> 0x2 'c' -> 0x3 etc.
401     */
402    
403 michael 1013 if ((ntree_p = mtree_p->pointers[*cmd & (MAXPTRLEN - 1)]) == NULL)
404 adx 30 {
405 michael 1013 ntree_p = MyMalloc(sizeof(struct MessageTree));
406     mtree_p->pointers[*cmd & (MAXPTRLEN - 1)] = ntree_p;
407 adx 30
408     mtree_p->links++; /* Have new pointer, so up ref count */
409     }
410 michael 896
411 michael 1013 add_msg_element(ntree_p, msg_p, cmd + 1);
412 adx 30 }
413     }
414    
415     /* del_msg_element()
416     *
417     * inputs - Pointer to MessageTree to delete from
418     * - pointer to command name to delete
419     * output - NONE
420     * side effects - recursively deletes a token from the Message Tree ;-)
421     */
422     /*
423     * How this works.
424     *
425     * Well, first off, the code recursively descends into the trie
426     * until it finds the terminating letter of the command being removed.
427     * Once it has done that, it marks the msg pointer as NULL then
428     * reduces the reference count on that allocated struct MessageTree
429     * since a command counts as a reference.
430     *
431     * Then it pops up the recurse stack. As it comes back up the recurse
432     * The code checks to see if the child now has no pointers or msg
433     * i.e. the links count has gone to zero. If its no longer used, the
434     * child struct MessageTree can be deleted. The parent reference
435     * to this child is then removed and the parents link count goes down.
436     * Thus, we continue to go back up removing all unused MessageTree(s)
437     */
438     static void
439     del_msg_element(struct MessageTree *mtree_p, const char *cmd)
440     {
441     struct MessageTree *ntree_p;
442    
443 michael 1246 /*
444     * In case this is called for a nonexistent command
445 adx 30 * check that there is a msg pointer here, else links-- goes -ve
446     * -db
447     */
448     if ((*cmd == '\0') && (mtree_p->msg != NULL))
449     {
450     mtree_p->msg = NULL;
451     mtree_p->links--;
452     }
453     else
454     {
455 michael 1013 if ((ntree_p = mtree_p->pointers[*cmd & (MAXPTRLEN - 1)]) != NULL)
456 adx 30 {
457 michael 1013 del_msg_element(ntree_p, cmd + 1);
458 michael 896
459 adx 30 if (ntree_p->links == 0)
460     {
461 michael 1013 mtree_p->pointers[*cmd & (MAXPTRLEN - 1)] = NULL;
462 adx 30 mtree_p->links--;
463     MyFree(ntree_p);
464     }
465     }
466     }
467     }
468    
469     /* msg_tree_parse()
470     *
471     * inputs - Pointer to command to find
472     * - Pointer to MessageTree root
473     * output - Find given command returning Message * if found NULL if not
474     * side effects - none
475     */
476     static struct Message *
477     msg_tree_parse(const char *cmd, struct MessageTree *root)
478     {
479 michael 522 struct MessageTree *mtree = root;
480 adx 30 assert(cmd && *cmd);
481    
482 michael 522 while (IsAlpha(*cmd) && (mtree = mtree->pointers[*cmd & (MAXPTRLEN - 1)]))
483     if (*++cmd == '\0')
484     return mtree->msg;
485 adx 30
486 michael 522 return NULL;
487 adx 30 }
488    
489     /* mod_add_cmd()
490     *
491     * inputs - pointer to struct Message
492     * output - none
493     * side effects - load this one command name
494     * msg->count msg->bytes is modified in place, in
495     * modules address space. Might not want to do that...
496     */
497     void
498     mod_add_cmd(struct Message *msg)
499     {
500 michael 1246 assert(msg && msg->cmd);
501 adx 30
502     /* command already added? */
503 michael 1246 if (msg_tree_parse(msg->cmd, &msg_tree))
504 adx 30 return;
505    
506     add_msg_element(&msg_tree, msg, msg->cmd);
507     msg->count = msg->rcount = msg->bytes = 0;
508     }
509    
510     /* mod_del_cmd()
511     *
512     * inputs - pointer to struct Message
513     * output - none
514     * side effects - unload this one command name
515     */
516     void
517     mod_del_cmd(struct Message *msg)
518     {
519 michael 1246 assert(msg && msg->cmd);
520 adx 30
521     del_msg_element(&msg_tree, msg->cmd);
522     }
523    
524     /* find_command()
525     *
526     * inputs - command name
527     * output - pointer to struct Message
528     * side effects - none
529     */
530     struct Message *
531     find_command(const char *cmd)
532     {
533 michael 896 return msg_tree_parse(cmd, &msg_tree);
534 adx 30 }
535    
536 michael 1246 static void
537     recurse_report_messages(struct Client *source_p, const struct MessageTree *mtree)
538     {
539     unsigned int i;
540    
541     if (mtree->msg != NULL)
542     sendto_one(source_p, form_str(RPL_STATSCOMMANDS),
543     me.name, source_p->name, mtree->msg->cmd,
544     mtree->msg->count, mtree->msg->bytes,
545     mtree->msg->rcount);
546    
547     for (i = 0; i < MAXPTRLEN; ++i)
548     if (mtree->pointers[i] != NULL)
549     recurse_report_messages(source_p, mtree->pointers[i]);
550     }
551    
552 adx 30 /* report_messages()
553     *
554     * inputs - pointer to client to report to
555     * output - NONE
556     * side effects - client is shown list of commands
557     */
558     void
559     report_messages(struct Client *source_p)
560     {
561 michael 1013 const struct MessageTree *mtree = &msg_tree;
562     unsigned int i;
563 adx 30
564 michael 1246 for (i = 0; i < MAXPTRLEN; ++i)
565 adx 30 if (mtree->pointers[i] != NULL)
566     recurse_report_messages(source_p, mtree->pointers[i]);
567     }
568    
569     /* cancel_clients()
570     *
571     * inputs -
572     * output -
573     * side effects -
574     */
575     static int
576     cancel_clients(struct Client *client_p, struct Client *source_p, char *cmd)
577     {
578     /* kill all possible points that are causing confusion here,
579     * I'm not sure I've got this all right...
580     * - avalon
581     *
582     * knowing avalon, probably not.
583     */
584    
585     /* with TS, fake prefixes are a common thing, during the
586     * connect burst when there's a nick collision, and they
587     * must be ignored rather than killed because one of the
588     * two is surviving.. so we don't bother sending them to
589     * all ops everytime, as this could send 'private' stuff
590     * from lagged clients. we do send the ones that cause
591     * servers to be dropped though, as well as the ones from
592     * non-TS servers -orabidoo
593     */
594     /* Incorrect prefix for a server from some connection. If it is a
595     * client trying to be annoying, just QUIT them, if it is a server
596     * then the same deal.
597     */
598     if (IsServer(source_p) || IsMe(source_p))
599     {
600     sendto_realops_flags(UMODE_DEBUG, L_ADMIN, "Message for %s[%s] from %s",
601     source_p->name, source_p->from->name,
602     get_client_name(client_p, SHOW_IP));
603     sendto_realops_flags(UMODE_DEBUG, L_OPER, "Message for %s[%s] from %s",
604     source_p->name, source_p->from->name,
605     get_client_name(client_p, MASK_IP));
606     sendto_realops_flags(UMODE_DEBUG, L_ALL,
607     "Not dropping server %s (%s) for Fake Direction",
608     client_p->name, source_p->name);
609 michael 896 return -1;
610 adx 30 /* return exit_client(client_p, client_p, &me, "Fake Direction");*/
611     }
612    
613     /* Ok, someone is trying to impose as a client and things are
614     * confused. If we got the wrong prefix from a server, send out a
615     * kill, else just exit the lame client.
616     */
617     /* If the fake prefix is coming from a TS server, discard it
618     * silently -orabidoo
619     *
620     * all servers must be TS these days --is
621     */
622     sendto_realops_flags(UMODE_DEBUG, L_ADMIN,
623     "Message for %s[%s@%s!%s] from %s (TS, ignored)",
624     source_p->name, source_p->username, source_p->host,
625     source_p->from->name, get_client_name(client_p, SHOW_IP));
626     sendto_realops_flags(UMODE_DEBUG, L_OPER,
627     "Message for %s[%s@%s!%s] from %s (TS, ignored)",
628     source_p->name, source_p->username, source_p->host,
629     source_p->from->name, get_client_name(client_p, MASK_IP));
630    
631 michael 896 return 0;
632 adx 30 }
633    
634     /* remove_unknown()
635     *
636     * inputs -
637     * output -
638     * side effects -
639     */
640     static void
641     remove_unknown(struct Client *client_p, char *lsender, char *lbuffer)
642     {
643     /* Do kill if it came from a server because it means there is a ghost
644     * user on the other server which needs to be removed. -avalon
645     * Tell opers about this. -Taner
646     */
647     /* '[0-9]something' is an ID (KILL/SQUIT depending on its length)
648     * 'nodots' is a nickname (KILL)
649     * 'no.dot.at.start' is a server (SQUIT)
650     */
651     if ((IsDigit(*lsender) && strlen(lsender) <= IRC_MAXSID) ||
652     strchr(lsender, '.') != NULL)
653     {
654     sendto_realops_flags(UMODE_DEBUG, L_ADMIN,
655     "Unknown prefix (%s) from %s, Squitting %s",
656     lbuffer, get_client_name(client_p, SHOW_IP), lsender);
657     sendto_realops_flags(UMODE_DEBUG, L_OPER,
658     "Unknown prefix (%s) from %s, Squitting %s",
659     lbuffer, client_p->name, lsender);
660     sendto_one(client_p, ":%s SQUIT %s :(Unknown prefix (%s) from %s)",
661     me.name, lsender, lbuffer, client_p->name);
662     }
663     else
664     sendto_one(client_p, ":%s KILL %s :%s (Unknown Client)",
665     me.name, lsender, me.name);
666     }
667    
668     /*
669     *
670     * parc number of arguments ('sender' counted as one!)
671     * parv[0] pointer to 'sender' (may point to empty string) (not used)
672     * parv[1]..parv[parc-1]
673     * pointers to additional parameters, this is a NULL
674     * terminated list (parv[parc] == NULL).
675     *
676     * *WARNING*
677     * Numerics are mostly error reports. If there is something
678     * wrong with the message, just *DROP* it! Don't even think of
679     * sending back a neat error message -- big danger of creating
680     * a ping pong error message...
681     */
682     static void
683 michael 1178 handle_numeric(char numeric[], struct Client *client_p, struct Client *source_p,
684     int parc, char *parv[])
685 adx 30 {
686     struct Client *target_p;
687     struct Channel *chptr;
688     char *t; /* current position within the buffer */
689     int i, tl; /* current length of presently being built string in t */
690    
691     if (parc < 2 || !IsServer(source_p))
692     return;
693    
694     /* Remap low number numerics. */
695     if (numeric[0] == '0')
696     numeric[0] = '1';
697    
698     /* Prepare the parameter portion of the message into 'buffer'.
699     * (Because the buffer is twice as large as the message buffer
700     * for the socket, no overflow can occur here... ...on current
701     * assumptions--bets are off, if these are changed --msa)
702     */
703     t = buffer;
704     for (i = 2; i < (parc - 1); i++)
705     {
706     tl = ircsprintf(t, " %s", parv[i]);
707     t += tl;
708     }
709    
710 michael 1298 ircsprintf(t, " :%s", parv[parc-1]);
711 adx 30
712     if (((target_p = find_person(client_p, parv[1])) != NULL) ||
713 michael 1169 ((target_p = hash_find_server(parv[1])) != NULL))
714 adx 30 {
715     if (IsMe(target_p))
716     {
717     int num;
718    
719     /*
720     * We shouldn't get numerics sent to us,
721     * any numerics we do get indicate a bug somewhere..
722     */
723     /* ugh. this is here because of nick collisions. when two servers
724     * relink, they burst each other their nicks, then perform collides.
725     * if there is a nick collision, BOTH servers will kill their own
726     * nicks, and BOTH will kill the other servers nick, which wont exist,
727     * because it will have been already killed by the local server.
728     *
729     * unfortunately, as we cant guarantee other servers will do the
730     * "right thing" on a nick collision, we have to keep both kills.
731     * ergo we need to ignore ERR_NOSUCHNICK. --fl_
732     */
733     /* quick comment. This _was_ tried. i.e. assume the other servers
734     * will do the "right thing" and kill a nick that is colliding.
735     * unfortunately, it did not work. --Dianora
736     */
737    
738     /* Yes, a good compiler would have optimised this, but
739     * this is probably easier to read. -db
740     */
741     num = atoi(numeric);
742    
743     if ((num != ERR_NOSUCHNICK))
744     sendto_realops_flags(UMODE_ALL, L_ADMIN,
745     "*** %s(via %s) sent a %s numeric to me: %s",
746     source_p->name, client_p->name, numeric, buffer);
747     return;
748     }
749     else if (target_p->from == client_p)
750     {
751     /* This message changed direction (nick collision?)
752     * ignore it.
753     */
754     return;
755     }
756    
757     /* csircd will send out unknown umode flag for +a (admin), drop it here. */
758     if ((atoi(numeric) == ERR_UMODEUNKNOWNFLAG) && MyClient(target_p))
759     return;
760    
761     /* Fake it for server hiding, if its our client */
762     if (ConfigServerHide.hide_servers &&
763 michael 1219 MyClient(target_p) && !HasUMode(target_p, UMODE_OPER))
764 adx 30 sendto_one(target_p, ":%s %s %s%s", me.name, numeric, target_p->name, buffer);
765 adx 753 else
766     sendto_one(target_p, ":%s %s %s%s", ID_or_name(source_p, target_p->from),
767     numeric, ID_or_name(target_p, target_p->from), buffer);
768 adx 30 return;
769     }
770     else if ((chptr = hash_find_channel(parv[1])) != NULL)
771 michael 1243 sendto_channel_local(ALL_MEMBERS, 0, chptr,
772 adx 30 ":%s %s %s %s",
773     source_p->name,
774     numeric, chptr->chname, buffer);
775     }
776    
777     /* m_not_oper()
778     * inputs -
779     * output -
780     * side effects - just returns a nastyogram to given user
781     */
782     void
783     m_not_oper(struct Client *client_p, struct Client *source_p,
784     int parc, char *parv[])
785     {
786     sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
787 michael 948 me.name, source_p->name);
788 adx 30 }
789    
790     void
791     m_unregistered(struct Client *client_p, struct Client *source_p,
792     int parc, char *parv[])
793     {
794 michael 1235 sendto_one(source_p, form_str(ERR_NOTREGISTERED), me.name,
795     source_p->name[0] ? source_p->name : "*");
796 adx 30 }
797    
798     void
799     m_registered(struct Client *client_p, struct Client *source_p,
800     int parc, char *parv[])
801     {
802 michael 1235 sendto_one(source_p, form_str(ERR_ALREADYREGISTRED),
803 michael 1080 me.name, source_p->name);
804 adx 30 }
805    
806     void
807     m_ignore(struct Client *client_p, struct Client *source_p,
808     int parc, char *parv[])
809     {
810     return;
811     }
812    
813 michael 946 void
814     rfc1459_command_send_error(struct Client *client_p, struct Client *source_p,
815     int parc, char *parv[])
816     {
817 michael 948 const char *in_para;
818 michael 946
819 michael 948 in_para = (parc > 1 && *parv[1] != '\0') ? parv[1] : "<>";
820 michael 946
821 michael 1247 ilog(LOG_TYPE_IRCD, "Received ERROR message from %s: %s",
822 michael 948 source_p->name, in_para);
823 michael 946
824     if (client_p == source_p)
825     {
826     sendto_realops_flags(UMODE_ALL, L_ADMIN, "ERROR :from %s -- %s",
827 michael 948 get_client_name(client_p, HIDE_IP), in_para);
828 michael 946 sendto_realops_flags(UMODE_ALL, L_OPER, "ERROR :from %s -- %s",
829 michael 948 get_client_name(client_p, MASK_IP), in_para);
830 michael 946 }
831     else
832     {
833     sendto_realops_flags(UMODE_ALL, L_OPER, "ERROR :from %s via %s -- %s",
834 michael 948 source_p->name, get_client_name(client_p, MASK_IP), in_para);
835 michael 946 sendto_realops_flags(UMODE_ALL, L_ADMIN, "ERROR :from %s via %s -- %s",
836 michael 948 source_p->name, get_client_name(client_p, HIDE_IP), in_para);
837 michael 946 }
838    
839     if (MyClient(source_p))
840     exit_client(source_p, source_p, "ERROR");
841     }

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision