2 * IRC - Internet Relay Chat, common/parse.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
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
8 * the Free Software Foundation; either version 1, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include "ircd_alloc.h"
31 #include "ircd_chattr.h"
32 #include "ircd_features.h"
33 #include "ircd_policy.h"
34 #include "ircd_reply.h"
35 #include "ircd_string.h"
40 #include "querycmds.h"
46 #include "s_numeric.h"
63 struct MessageTree *pointers[26];
67 struct Message msgtab[] = {
71 0, MAXPARA, MFLG_SLOW, 0,
72 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
73 { m_unregistered, m_privmsg, ms_privmsg, mo_privmsg, m_ignore }
78 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
79 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
80 { m_nick, m_nick, ms_nick, m_nick, m_ignore }
85 0, MAXPARA, MFLG_SLOW | MFLG_IGNORE, 0,
86 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
87 { m_ignore, m_notice, ms_notice, mo_notice, m_ignore }
92 0, MAXPARA, MFLG_SLOW, 0,
93 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
94 { m_unregistered, m_wallchops, ms_wallchops, m_wallchops, m_ignore }
99 0, MAXPARA, MFLG_SLOW, 0,
100 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
101 { m_unregistered, m_cprivmsg, m_ignore, m_cprivmsg, m_ignore }
106 0, MAXPARA, MFLG_SLOW, 0,
107 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
108 { m_unregistered, m_cnotice, m_ignore, m_cnotice, m_ignore }
113 0, MAXPARA, MFLG_SLOW, 0,
114 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
115 { m_unregistered, m_join, ms_join, m_join, m_ignore }
120 0, MAXPARA, MFLG_SLOW, 0,
121 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
122 { m_unregistered, m_mode, ms_mode, m_mode, m_ignore }
127 0, MAXPARA, MFLG_SLOW, 0,
128 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
129 { m_ignore, m_ignore, ms_burst, m_ignore, m_ignore }
134 0, MAXPARA, MFLG_SLOW, 0,
135 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
136 { m_ignore, m_ignore, ms_create, m_ignore, m_ignore }
141 0, MAXPARA, MFLG_SLOW, 0,
142 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
143 { m_ignore, m_ignore, ms_destruct, m_ignore, m_ignore }
148 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
149 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
150 { m_quit, m_quit, ms_quit, m_quit, m_ignore }
155 0, MAXPARA, MFLG_SLOW, 0,
156 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
157 { m_unregistered, m_part, ms_part, m_part, m_ignore }
162 0, MAXPARA, MFLG_SLOW, 0,
163 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
164 { m_unregistered, m_topic, ms_topic, m_topic, m_ignore }
169 0, MAXPARA, MFLG_SLOW, 0,
170 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
171 { m_unregistered, m_invite, ms_invite, m_invite, m_ignore }
176 0, MAXPARA, MFLG_SLOW, 0,
177 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
178 { m_unregistered, m_kick, ms_kick, m_kick, m_ignore }
183 0, MAXPARA, MFLG_SLOW, 0,
184 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
185 { m_unregistered, m_not_oper, ms_wallops, mo_wallops, m_ignore }
190 0, MAXPARA, MFLG_SLOW, 0,
191 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
192 { m_unregistered, m_not_oper, ms_wallusers, mo_wallusers, m_ignore }
197 0, MAXPARA, MFLG_SLOW, 0,
198 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
199 { m_ignore, m_ignore, ms_desynch, m_ignore, m_ignore }
204 0, MAXPARA, MFLG_SLOW, 0,
205 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
206 { m_unregistered, m_ping, ms_ping, mo_ping, m_ignore }
211 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
212 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
213 { mr_pong, m_pong, ms_pong, m_pong, m_ignore }
218 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
219 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
220 { mr_error, m_ignore, ms_error, m_ignore, m_ignore }
225 0, MAXPARA, MFLG_SLOW, 0,
226 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
227 { m_unregistered, m_not_oper, ms_kill, mo_kill, m_ignore }
232 0, MAXPARA, MFLG_SLOW, 0,
233 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
234 { m_user, m_registered, m_ignore, m_registered, m_ignore }
239 0, MAXPARA, MFLG_SLOW, 0,
240 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
241 { m_unregistered, m_away, ms_away, m_away, m_ignore }
247 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
248 { m_unregistered, m_ison, m_ignore, m_ison, m_ignore }
253 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
254 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
255 { mr_server, m_registered, ms_server, m_registered, m_ignore }
260 0, MAXPARA, MFLG_SLOW, 0,
261 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
262 { m_unregistered, m_not_oper, ms_squit, mo_squit, m_ignore }
267 0, MAXPARA, MFLG_SLOW, 0,
268 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
269 { m_unregistered, m_whois, ms_whois, m_whois, m_ignore }
274 0, MAXPARA, MFLG_SLOW, 0,
275 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
276 { m_unregistered, m_who, m_ignore, m_who, m_ignore }
281 0, MAXPARA, MFLG_SLOW, 0,
282 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
283 { m_unregistered, m_whowas, m_whowas, m_whowas, m_ignore }
288 0, MAXPARA, MFLG_SLOW, 0,
289 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
290 { m_unregistered, m_list, m_ignore, m_list, m_ignore }
295 0, MAXPARA, MFLG_SLOW, 0,
296 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
297 { m_unregistered, m_names, ms_names, m_names, m_ignore }
303 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
304 { m_unregistered, m_userhost, m_ignore, m_userhost, m_ignore }
310 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
311 { m_unregistered, m_userip, m_ignore, m_userip, m_ignore }
316 0, MAXPARA, MFLG_SLOW, 0,
317 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
318 #ifdef HEAD_IN_SAND_TRACE
319 { m_unregistered, m_not_oper, ms_trace, mo_trace, m_ignore }
321 { m_unregistered, m_trace, ms_trace, mo_trace, m_ignore }
327 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
328 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
329 { mr_pass, m_registered, m_ignore, m_registered, m_ignore }
334 0, MAXPARA, MFLG_SLOW, 0,
335 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
336 { m_unregistered, m_lusers, ms_lusers, m_lusers, m_ignore }
341 0, MAXPARA, MFLG_SLOW, 0,
342 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
343 { m_unregistered, m_time, m_time, m_time, m_ignore }
348 0, MAXPARA, MFLG_SLOW, 0,
349 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
350 { m_unregistered, m_ignore, ms_settime, mo_settime, m_ignore }
355 0, MAXPARA, MFLG_SLOW, 0,
356 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
357 { m_unregistered, m_not_oper, ms_rping, mo_rping, m_ignore }
362 0, MAXPARA, MFLG_SLOW, 0,
363 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
364 { m_unregistered, m_ignore, ms_rpong, m_ignore, m_ignore }
369 0, MAXPARA, MFLG_SLOW, 0,
370 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
371 { m_unregistered, m_oper, ms_oper, mo_oper, m_ignore }
376 0, MAXPARA, MFLG_SLOW, 0,
377 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
378 { m_unregistered, m_not_oper, ms_connect, mo_connect, m_ignore }
383 0, MAXPARA, MFLG_SLOW, 0,
384 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
385 { m_unregistered, m_map, m_ignore, mo_map, m_ignore }
390 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
391 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
392 { m_version, m_version, ms_version, mo_version, m_ignore }
397 0, MAXPARA, MFLG_SLOW, 0,
398 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
399 { m_unregistered, m_stats, ms_stats, mo_stats, m_ignore }
404 0, MAXPARA, MFLG_SLOW, 0,
405 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
406 #ifdef HEAD_IN_SAND_LINKS
407 { m_unregistered, m_links_redirect, m_links, m_links, m_ignore }
409 { m_unregistered, m_links, m_links, m_links, m_ignore }
415 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
416 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
417 { m_admin, m_admin, ms_admin, mo_admin, m_ignore }
422 0, MAXPARA, MFLG_SLOW, 0,
423 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
424 { m_unregistered, m_help, m_ignore, m_help, m_ignore }
429 0, MAXPARA, MFLG_SLOW, 0,
430 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
431 { m_unregistered, m_info, ms_info, mo_info, m_ignore }
436 0, MAXPARA, MFLG_SLOW, 0,
437 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
438 { m_unregistered, m_motd, m_motd, m_motd, m_ignore }
443 0, MAXPARA, MFLG_SLOW, 0,
444 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
445 { m_unregistered, m_not_oper, m_ignore, mo_close, m_ignore }
450 0, MAXPARA, MFLG_SLOW, 0,
451 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
452 { m_unregistered, m_silence, ms_silence, m_silence, m_ignore }
457 0, MAXPARA, MFLG_SLOW, 0,
458 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
459 { m_unregistered, m_gline, ms_gline, mo_gline, m_ignore }
464 0, MAXPARA, MFLG_SLOW, 0,
465 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
466 { m_unregistered, m_jupe, ms_jupe, mo_jupe, m_ignore }
471 0, MAXPARA, MFLG_SLOW, 0,
472 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
473 { m_unregistered, m_not_oper, ms_opmode, mo_opmode, m_ignore }
478 0, MAXPARA, MFLG_SLOW, 0,
479 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
480 { m_unregistered, m_not_oper, ms_clearmode, mo_clearmode, m_ignore }
485 0, MAXPARA, MFLG_SLOW, 0,
486 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
487 { m_unregistered, m_not_oper, ms_uping, mo_uping, m_ignore }
492 0, MAXPARA, MFLG_SLOW, 0,
493 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
494 { m_ignore, m_ignore, ms_end_of_burst, m_ignore, m_ignore }
497 MSG_END_OF_BURST_ACK,
498 TOK_END_OF_BURST_ACK,
500 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
501 { m_ignore, m_ignore, ms_end_of_burst_ack, m_ignore, m_ignore }
506 0, MAXPARA, MFLG_SLOW, 0,
507 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
508 { m_unregistered, m_hash, m_hash, m_hash, m_ignore }
513 0, MAXPARA, MFLG_SLOW, 0,
514 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
515 { m_unregistered, m_dns, m_dns, m_dns, m_ignore }
520 0, MAXPARA, MFLG_SLOW, 0,
521 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
522 { m_unregistered, m_not_oper, m_ignore, mo_rehash, m_ignore }
527 0, MAXPARA, MFLG_SLOW, 0,
528 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
529 { m_unregistered, m_not_oper, m_ignore, mo_restart, m_ignore }
534 0, MAXPARA, MFLG_SLOW, 0,
535 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
536 { m_unregistered, m_not_oper, m_ignore, mo_die, m_ignore }
541 0, MAXPARA, MFLG_SLOW, 0,
542 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
543 { m_proto, m_proto, m_proto, m_proto, m_ignore }
548 0, MAXPARA, MFLG_SLOW, 0,
549 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
550 { m_unregistered, m_not_oper, m_ignore, mo_set, m_ignore }
555 0, MAXPARA, MFLG_SLOW, 0,
556 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
557 { m_unregistered, m_not_oper, m_ignore, mo_reset, m_ignore }
562 0, MAXPARA, MFLG_SLOW, 0,
563 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
564 { m_unregistered, m_not_oper, m_ignore, mo_get, m_ignore }
569 0, MAXPARA, MFLG_SLOW, 0,
570 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
571 { m_unregistered, m_not_oper, m_ignore, mo_privs, m_ignore }
576 0, MAXPARA, MFLG_SLOW, 0,
577 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
578 { m_ignore, m_ignore, ms_account, m_ignore, m_ignore }
580 /* This command is an alias for QUIT during the unregistered part of
581 * of the server. This is because someone jumping via a broken web
582 * proxy will send a 'POST' as their first command - which we will
583 * obviously disconnect them immediately for, stopping people abusing
589 0, MAXPARA, MFLG_SLOW, 0,
590 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
591 { m_quit, m_ignore, m_ignore, m_ignore, m_ignore }
597 static char *para[MAXPARA + 2]; /* leave room for prefix and null */
600 * Message Tree stuff mostly written by orabidoo, with changes by Dianora.
601 * Adapted to Undernet, adding token support, etc by comstud 10/06/97
604 static struct MessageTree msg_tree_cmd;
605 static struct MessageTree msg_tree_tok;
608 * Guts of making the token tree...
610 static struct Message **do_msg_tree_tok(struct MessageTree *mtree, char *prefix,
611 struct Message **mptr)
613 char newprefix[64]; /* Must be longer than every command name */
615 struct MessageTree *mtree1;
618 if (!lp || !strncmp((*mptr)->tok, prefix, lp))
620 if (!mptr[1] || (lp && strncmp(mptr[1]->tok, prefix, lp)))
622 /* last command in the message struct or last command in this prefix */
623 mtree->final = (*mptr)->tok + lp;
625 for (c = 0; c < 26; ++c)
626 mtree->pointers[c] = NULL;
629 /* command in this prefix */
630 if (0 == ircd_strcmp((*mptr)->tok, prefix))
633 mtree->msg = *mptr++;
638 for (c = 'A'; c <= 'Z'; ++c)
640 if ((*mptr)->tok[lp] == c)
642 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
643 mtree1->final = NULL;
644 mtree->pointers[c - 'A'] = mtree1;
645 strcpy(newprefix, prefix);
647 newprefix[lp + 1] = '\0';
648 mptr = do_msg_tree_tok(mtree1, newprefix, mptr);
649 if (!*mptr || strncmp((*mptr)->tok, prefix, lp))
651 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
652 mtree->pointers[c2] = NULL;
657 mtree->pointers[c - 'A'] = NULL;
662 * XXX - should never be here, quick hack, this can be done better
669 * Guts of making the command tree...
671 static struct Message *do_msg_tree_cmd(struct MessageTree *mtree, char *prefix,
672 struct Message *mptr)
674 char newprefix[64]; /* Must be longer than every command name */
676 struct MessageTree *mtree1;
679 if (!lp || !strncmp(mptr->cmd, prefix, lp))
681 if (!mptr[1].cmd || (lp && strncmp(mptr[1].cmd, prefix, lp)))
683 /* last command in the message struct or last command in this prefix */
684 mtree->final = mptr->cmd + lp;
686 for (c = 0; c < 26; ++c)
687 mtree->pointers[c] = NULL;
690 /* command in this prefix */
691 if (0 == ircd_strcmp(mptr->cmd, prefix))
699 for (c = 'A'; c <= 'Z'; ++c)
701 if (mptr->cmd[lp] == c)
703 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
704 mtree1->final = NULL;
705 mtree->pointers[c - 'A'] = mtree1;
706 strcpy(newprefix, prefix);
708 newprefix[lp + 1] = '\0';
709 mptr = do_msg_tree_cmd(mtree1, newprefix, mptr);
710 if (!mptr->cmd || strncmp(mptr->cmd, prefix, lp))
712 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
713 mtree->pointers[c2] = NULL;
718 mtree->pointers[c - 'A'] = NULL;
723 * This should never happen
729 static int mcmdcmp(const struct Message *m1, const struct Message *m2)
731 return strcmp(m1->cmd, m2->cmd);
734 static int mtokcmp(const struct Message **m1, const struct Message **m2)
736 return strcmp((*m1)->tok, (*m2)->tok);
740 * Sort the command names.
741 * Create table of pointers into msgtab for tokens.
742 * Create trees for ->cmd and ->tok and free the token pointers.
744 void initmsgtree(void)
747 struct Message *msg = msgtab;
749 struct Message **msgtab_tok;
750 struct Message **msgtok;
752 for (i = 0; msg->cmd; ++i, ++msg)
754 qsort(msgtab, i, sizeof(struct Message),
755 (int (*)(const void *, const void *))mcmdcmp);
756 msgtab_tok = (struct Message **)MyMalloc((i + 1) * sizeof(struct Message *));
757 for (ii = 0; ii < i; ++ii)
758 msgtab_tok[ii] = msgtab + ii;
759 msgtab_tok[i] = NULL; /* Needed by `do_msg_tree_tok' */
760 qsort(msgtab_tok, i, sizeof(struct Message *),
761 (int (*)(const void *, const void *))mtokcmp);
762 msg = do_msg_tree_cmd(&msg_tree_cmd, "", msgtab);
763 msgtok = do_msg_tree_tok(&msg_tree_tok, "", msgtab_tok);
768 * Generic tree parser which works for both commands and tokens.
771 static struct Message *msg_tree_parse(char *cmd, struct MessageTree *root)
773 struct MessageTree *mtree;
774 unsigned char r = (0xdf & (unsigned char)*cmd) - 'A';
775 if (r > 25 || !(mtree = root->pointers[r]))
779 r = 0xdf & (unsigned char)*++cmd;
780 if (mtree->final && *mtree->final == r)
782 if ((r -= 'A') > 25 || !(mtree = mtree->pointers[r]))
788 * This one is identical to the one above, but it is slower because it
789 * makes sure that `cmd' matches the _full_ command, exactly.
790 * This is to avoid confusion with commands like /quake on clients
791 * that send unknown commands directly to the server.
793 static struct Message *msg_tree_parse_client(char *cmd,
794 struct MessageTree *root)
796 struct MessageTree *mtree;
797 unsigned char q = (0xdf & (unsigned char)*cmd) - 'A';
798 if (q > 25 || !(mtree = root->pointers[q]))
802 q = 0xdf & (unsigned char)*++cmd;
803 if (mtree->final && 0 == ircd_strcmp(mtree->final, cmd))
805 if ((q -= 'A') > 25 || !(mtree = mtree->pointers[q]))
813 * NOTE: parse_*() should not be called recusively by any other fucntions!
815 int parse_client(struct Client *cptr, char *buffer, char *bufend)
817 struct Client* from = cptr;
823 struct Message* mptr;
824 MessageHandler handler = 0;
826 Debug((DEBUG_DEBUG, "Client Parsing: %s", buffer));
831 para[0] = cli_name(from);
832 for (ch = buffer; *ch == ' '; ch++); /* Eat leading spaces */
833 if (*ch == ':') /* Is any client doing this ? */
835 for (++ch; *ch && *ch != ' '; ++ch)
836 ; /* Ignore sender prefix from client */
838 ch++; /* Advance to command */
844 ServerStats->is_empt++;
845 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
846 cli_name(cptr), cli_name(from)));
850 if ((s = strchr(ch, ' ')))
854 * This is a client/unregistered entity.
855 * Check long command list only.
857 if (!(mptr = msg_tree_parse_client(ch, &msg_tree_cmd)))
860 * Note: Give error message *only* to recognized
861 * persons. It's a nightmare situation to have
862 * two programs sending "Unknown command"'s or
863 * equivalent to each other at full blast....
864 * If it has got to person state, it at least
865 * seems to be well behaving. Perhaps this message
866 * should never be generated, though... --msa
867 * Hm, when is the buffer empty -- if a command
868 * code has been found ?? -Armin
870 if (buffer[0] != '\0')
873 send_reply(from, ERR_UNKNOWNCOMMAND, ch);
874 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
875 ch, get_client_name(cptr, HIDE_IP)));
877 ServerStats->is_unco++;
881 paramcount = mptr->parameters;
882 i = bufend - ((s) ? s : ch);
884 if ((mptr->flags & MFLG_SLOW))
885 cli_since(cptr) += (2 + i / 120);
887 * Allow only 1 msg per 2 seconds
888 * (on average) to prevent dumping.
889 * to keep the response rate up,
890 * bursts of up to 5 msgs are allowed
895 * Must the following loop really be so devious? On
896 * surface it splits the message to parameters from
897 * blank spaces. But, if paramcount has been reached,
898 * the rest of the message goes into this last parameter
899 * (about same effect as ":" has...) --msa
902 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
907 if (paramcount > MAXPARA)
908 paramcount = MAXPARA;
912 * Never "FRANCE " again!! ;-) Clean
913 * out *all* blanks.. --msa
923 * The rest is single parameter--can
924 * include blanks also.
932 for (; *s != ' ' && *s; s++);
938 handler = mptr->handlers[cli_handler(cptr)];
939 assert(0 != handler);
941 if (!feature_bool(FEAT_IDLE_FROM_MSG) && IsUser(cptr) &&
942 handler != m_ping && handler != m_ignore)
943 cli_user(from)->last = CurrentTime;
945 return (*handler) (cptr, from, i, para);
948 int parse_server(struct Client *cptr, char *buffer, char *bufend)
950 struct Client* from = cptr;
957 struct Message* mptr;
959 Debug((DEBUG_DEBUG, "Server Parsing: %s", buffer));
964 para[0] = cli_name(from);
967 * A server ALWAYS sends a prefix. When it starts with a ':' it's the
968 * protocol 9 prefix: a nick or a server name. Otherwise it's a numeric
973 /* Let para[0] point to the name of the sender */
975 if (!(ch = strchr(ch, ' ')))
979 /* And let `from' point to its client structure,
980 opps.. a server is _also_ a client --Nem */
981 from = FindClient(para[0]);
984 * If the client corresponding to the
985 * prefix is not found. We must ignore it,
986 * it is simply a lagged message travelling
987 * upstream a SQUIT that removed the client
992 Debug((DEBUG_NOTICE, "Unknown prefix (%s)(%s) from (%s)",
993 para[0], buffer, cli_name(cptr)));
994 ++ServerStats->is_unpf;
998 * However, the only thing that MUST be
999 * allowed to travel upstream against an
1000 * squit, is an SQUIT itself (the timestamp
1001 * protects us from being used wrong)
1005 para[0] = cli_name(cptr);
1011 else if (cli_from(from) != cptr)
1013 ++ServerStats->is_wrdi;
1014 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
1015 buffer, cli_name(cptr)));
1020 char numeric_prefix[6];
1022 for (i = 0; i < 5; ++i) {
1023 if ('\0' == ch[i] || ' ' == (numeric_prefix[i] = ch[i])) {
1027 numeric_prefix[i] = '\0';
1030 * We got a numeric nick as prefix
1031 * 1 or 2 character prefixes are from servers
1032 * 3 or 5 chars are from clients
1035 protocol_violation(cptr,"Missing Prefix");
1038 else if (' ' == ch[1] || ' ' == ch[2])
1039 from = FindNServer(numeric_prefix);
1041 from = findNUser(numeric_prefix);
1047 while (*ch != ' ' && *ch);
1050 * If the client corresponding to the
1051 * prefix is not found. We must ignore it,
1052 * it is simply a lagged message travelling
1053 * upstream a SQUIT that removed the client
1055 * There turned out to be other reasons that
1056 * a prefix is unknown, needing an upstream
1057 * KILL. Also, next to an SQUIT we better
1058 * allow a KILL to pass too.
1063 ServerStats->is_unpf++;
1066 if (*ch == 'N' && (ch[1] == ' ' || ch[1] == 'I'))
1067 /* Only sent a KILL for a nick change */
1069 struct Client *server;
1070 /* Kill the unknown numeric prefix upstream if
1071 * it's server still exists: */
1072 if ((server = FindNServer(numeric_prefix)) && cli_from(server) == cptr)
1073 sendcmdto_one(&me, CMD_KILL, cptr, "%s :%s (Unknown numeric nick)",
1074 numeric_prefix, cli_name(&me));
1077 * Things that must be allowed to travel
1078 * upstream against an squit:
1080 if (ch[1] == 'Q' || (*ch == 'D' && ch[1] == ' ') ||
1081 (*ch == 'K' && ch[2] == 'L'))
1087 /* Let para[0] point to the name of the sender */
1088 para[0] = cli_name(from);
1090 if (cli_from(from) != cptr)
1092 ServerStats->is_wrdi++;
1093 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
1094 buffer, cli_name(cptr)));
1103 ServerStats->is_empt++;
1104 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
1105 cli_name(cptr), cli_name(from)));
1110 * Extract the command code from the packet. Point s to the end
1111 * of the command code and calculate the length using pointer
1112 * arithmetic. Note: only need length for numerics and *all*
1113 * numerics must have parameters and thus a space after the command
1116 s = strchr(ch, ' '); /* s -> End of the command code */
1117 len = (s) ? (s - ch) : 0;
1118 if (len == 3 && IsDigit(*ch))
1120 numeric = (*ch - '0') * 100 + (*(ch + 1) - '0') * 10 + (*(ch + 2) - '0');
1121 paramcount = 2; /* destination, and the rest of it */
1122 ServerStats->is_num++;
1123 mptr = NULL; /* Init. to avoid stupid compiler warning :/ */
1130 /* Version Receive Send
1132 * 2.10.0 Tkn/Long Long
1133 * 2.10.10 Tkn/Long Tkn
1136 * Clients/unreg servers always receive/
1137 * send long commands -record
1141 * This is a server. Check the token command list.
1142 * -record!jegelhof@cloud9.net
1144 mptr = msg_tree_parse(ch, &msg_tree_tok);
1146 #if 1 /* for 2.10.0/2.10.10 */
1148 * This code supports 2.9 and 2.10.0 sending long commands.
1149 * It makes more calls to ircd_strcmp() than the above
1150 * so it will be somewhat slower.
1153 mptr = msg_tree_parse(ch, &msg_tree_cmd);
1159 * Note: Give error message *only* to recognized
1160 * persons. It's a nightmare situation to have
1161 * two programs sending "Unknown command"'s or
1162 * equivalent to each other at full blast....
1163 * If it has got to person state, it at least
1164 * seems to be well behaving. Perhaps this message
1165 * should never be generated, though... --msa
1166 * Hm, when is the buffer empty -- if a command
1167 * code has been found ?? -Armin
1170 if (buffer[0] != '\0')
1172 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
1173 ch, get_client_name(cptr, HIDE_IP)));
1176 ServerStats->is_unco++;
1180 paramcount = mptr->parameters;
1181 i = bufend - ((s) ? s : ch);
1185 * Must the following loop really be so devious? On
1186 * surface it splits the message to parameters from
1187 * blank spaces. But, if paramcount has been reached,
1188 * the rest of the message goes into this last parameter
1189 * (about same effect as ":" has...) --msa
1192 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
1197 if (paramcount > MAXPARA)
1198 paramcount = MAXPARA;
1202 * Never "FRANCE " again!! ;-) Clean
1203 * out *all* blanks.. --msa
1213 * The rest is single parameter--can
1214 * include blanks also.
1217 para[++i] = s; /* preserve the colon to make do_numeric happy */
1223 if (i >= paramcount)
1225 for (; *s != ' ' && *s; s++);
1230 return (do_numeric(numeric, (*buffer != ':'), cptr, from, i, para));
1233 return (*mptr->handlers[cli_handler(cptr)]) (cptr, from, i, para);