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.
28 #include "ircd_alloc.h"
29 #include "ircd_chattr.h"
30 #include "ircd_reply.h"
31 #include "ircd_string.h"
36 #include "querycmds.h"
42 #include "s_numeric.h"
59 struct MessageTree *pointers[26];
63 struct Message msgtab[] = {
67 0, MAXPARA, MFLG_SLOW, 0,
68 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
69 { m_unregistered, m_privmsg, ms_privmsg, mo_privmsg, m_ignore }
74 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
75 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
76 { m_nick, m_nick, ms_nick, m_nick, m_ignore }
81 0, MAXPARA, MFLG_SLOW | MFLG_IGNORE, 0,
82 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
83 { m_ignore, m_notice, ms_notice, mo_notice, m_ignore }
88 0, MAXPARA, MFLG_SLOW, 0,
89 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
90 { m_unregistered, m_wallchops, ms_wallchops, m_wallchops, m_ignore }
95 0, MAXPARA, MFLG_SLOW, 0,
96 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
97 { m_unregistered, m_cprivmsg, m_ignore, m_cprivmsg, m_ignore }
102 0, MAXPARA, MFLG_SLOW, 0,
103 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
104 { m_unregistered, m_cnotice, m_ignore, m_cnotice, m_ignore }
109 0, MAXPARA, MFLG_SLOW, 0,
110 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
111 { m_unregistered, m_join, ms_join, m_join, m_ignore }
116 0, MAXPARA, MFLG_SLOW, 0,
117 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
118 { m_unregistered, m_mode, ms_mode, m_mode, m_ignore }
123 0, MAXPARA, MFLG_SLOW, 0,
124 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
125 { m_ignore, m_ignore, ms_burst, m_ignore, m_ignore }
130 0, MAXPARA, MFLG_SLOW, 0,
131 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
132 { m_ignore, m_ignore, ms_create, m_ignore, m_ignore }
137 0, MAXPARA, MFLG_SLOW, 0,
138 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
139 { m_ignore, m_ignore, ms_destruct, m_ignore, m_ignore }
144 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
145 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
146 { m_quit, m_quit, ms_quit, m_quit, m_ignore }
151 0, MAXPARA, MFLG_SLOW, 0,
152 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
153 { m_unregistered, m_part, ms_part, m_part, m_ignore }
158 0, MAXPARA, MFLG_SLOW, 0,
159 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
160 { m_unregistered, m_topic, ms_topic, m_topic, m_ignore }
165 0, MAXPARA, MFLG_SLOW, 0,
166 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
167 { m_unregistered, m_invite, ms_invite, m_invite, m_ignore }
172 0, MAXPARA, MFLG_SLOW, 0,
173 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
174 { m_unregistered, m_kick, ms_kick, m_kick, m_ignore }
179 0, MAXPARA, MFLG_SLOW, 0,
180 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
181 { m_unregistered, m_not_oper, ms_wallops, mo_wallops, m_ignore }
186 0, MAXPARA, MFLG_SLOW, 0,
187 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
188 { m_ignore, m_ignore, ms_desynch, m_ignore, m_ignore }
193 0, MAXPARA, MFLG_SLOW, 0,
194 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
195 { m_unregistered, m_ping, ms_ping, m_ping, m_ignore }
200 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
201 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
202 { mr_pong, m_pong, ms_pong, m_pong, m_ignore }
207 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
208 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
209 { m_ignore, m_ignore, ms_error, m_ignore, m_ignore }
214 0, MAXPARA, MFLG_SLOW, 0,
215 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
216 { m_unregistered, m_not_oper, ms_kill, mo_kill, m_ignore }
221 0, MAXPARA, MFLG_SLOW, 0,
222 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
223 { m_user, m_registered, m_ignore, m_registered, m_ignore }
228 0, MAXPARA, MFLG_SLOW, 0,
229 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
230 { m_unregistered, m_away, ms_away, m_away, m_ignore }
236 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
237 { m_unregistered, m_ison, m_ignore, m_ison, m_ignore }
242 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
243 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
244 { mr_server, m_registered, ms_server, m_registered, m_ignore }
249 0, MAXPARA, MFLG_SLOW, 0,
250 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
251 { m_unregistered, m_not_oper, ms_squit, mo_squit, m_ignore }
256 0, MAXPARA, MFLG_SLOW, 0,
257 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
258 { m_unregistered, m_whois, m_whois, m_whois, m_ignore }
263 0, MAXPARA, MFLG_SLOW, 0,
264 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
265 { m_unregistered, m_who, m_ignore, m_who, m_ignore }
270 0, MAXPARA, MFLG_SLOW, 0,
271 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
272 { m_unregistered, m_whowas, m_whowas, m_whowas, m_ignore }
277 0, MAXPARA, MFLG_SLOW, 0,
278 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
279 { m_unregistered, m_list, m_ignore, m_list, m_ignore }
284 0, MAXPARA, MFLG_SLOW, 0,
285 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
286 { m_unregistered, m_names, ms_names, m_names, m_ignore }
292 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
293 { m_unregistered, m_userhost, m_ignore, m_userhost, m_ignore }
299 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
300 { m_unregistered, m_userip, m_ignore, m_userip, m_ignore }
305 0, MAXPARA, MFLG_SLOW, 0,
306 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
307 { m_unregistered, m_trace, ms_trace, mo_trace, m_ignore }
312 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
313 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
314 { mr_pass, m_registered, m_ignore, m_registered, m_ignore }
319 0, MAXPARA, MFLG_SLOW, 0,
320 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
321 { m_unregistered, m_lusers, ms_lusers, m_lusers, m_ignore }
326 0, MAXPARA, MFLG_SLOW, 0,
327 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
328 { m_unregistered, m_time, m_time, m_time, m_ignore }
333 0, MAXPARA, MFLG_SLOW, 0,
334 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
335 { m_unregistered, m_ignore, ms_settime, mo_settime, m_ignore }
340 0, MAXPARA, MFLG_SLOW, 0,
341 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
342 { m_unregistered, m_not_oper, ms_rping, mo_rping, m_ignore }
347 0, MAXPARA, MFLG_SLOW, 0,
348 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
349 { m_unregistered, m_ignore, ms_rpong, m_ignore, m_ignore }
354 0, MAXPARA, MFLG_SLOW, 0,
355 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
357 { m_unregistered, m_oper, ms_oper, mo_oper, m_ignore }
359 { m_unregistered, m_oper, m_ignore, m_ignore, m_ignore }
365 0, MAXPARA, MFLG_SLOW, 0,
366 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
367 { m_unregistered, m_not_oper, ms_connect, mo_connect, m_ignore }
372 0, MAXPARA, MFLG_SLOW, 0,
373 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
374 { m_unregistered, m_map, m_ignore, m_map, m_ignore }
379 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
380 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
381 { m_version, m_version, ms_version, m_version, m_ignore }
386 0, MAXPARA, MFLG_SLOW, 0,
387 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
388 { m_unregistered, m_stats, ms_stats, mo_stats, m_ignore }
393 0, MAXPARA, MFLG_SLOW, 0,
394 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
395 { m_unregistered, m_links, ms_links, m_links, m_ignore }
400 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
401 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
402 { m_admin, m_admin, ms_admin, m_admin, m_ignore }
407 0, MAXPARA, MFLG_SLOW, 0,
408 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
409 { m_unregistered, m_help, m_ignore, m_help, m_ignore }
414 0, MAXPARA, MFLG_SLOW, 0,
415 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
416 { m_unregistered, m_info, ms_info, mo_info, m_ignore }
421 0, MAXPARA, MFLG_SLOW, 0,
422 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
423 { m_unregistered, m_motd, m_motd, m_motd, m_ignore }
428 0, MAXPARA, MFLG_SLOW, 0,
429 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
430 { m_unregistered, m_not_oper, m_ignore, mo_close, m_ignore }
435 0, MAXPARA, MFLG_SLOW, 0,
436 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
437 { m_unregistered, m_silence, ms_silence, m_silence, m_ignore }
442 0, MAXPARA, MFLG_SLOW, 0,
443 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
444 { m_unregistered, m_gline, ms_gline, mo_gline, m_ignore }
449 0, MAXPARA, MFLG_SLOW, 0,
450 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
451 { m_unregistered, m_jupe, ms_jupe, mo_jupe, m_ignore }
456 0, MAXPARA, MFLG_SLOW, 0,
457 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
458 { m_unregistered, m_not_oper, ms_opmode, mo_opmode, m_ignore }
463 0, MAXPARA, MFLG_SLOW, 0,
464 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
465 { m_unregistered, m_not_oper, ms_clearmode, mo_clearmode, m_ignore }
470 0, MAXPARA, MFLG_SLOW, 0,
471 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
472 { m_unregistered, m_not_oper, ms_uping, mo_uping, m_ignore }
477 0, MAXPARA, MFLG_SLOW, 0,
478 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
479 { m_ignore, m_ignore, ms_end_of_burst, m_ignore, m_ignore }
482 MSG_END_OF_BURST_ACK,
483 TOK_END_OF_BURST_ACK,
485 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
486 { m_ignore, m_ignore, ms_end_of_burst_ack, m_ignore, m_ignore }
491 0, MAXPARA, MFLG_SLOW, 0,
492 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
493 { m_unregistered, m_hash, m_hash, m_hash, m_ignore }
498 0, MAXPARA, MFLG_SLOW, 0,
499 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
500 { m_unregistered, m_dns, m_dns, m_dns, m_ignore }
505 0, MAXPARA, MFLG_SLOW, 0,
506 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
507 { m_unregistered, m_not_oper, m_ignore, mo_rehash, m_ignore }
512 0, MAXPARA, MFLG_SLOW, 0,
513 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
514 { m_unregistered, m_not_oper, m_ignore, mo_restart, m_ignore }
519 0, MAXPARA, MFLG_SLOW, 0,
520 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
521 { m_unregistered, m_not_oper, m_ignore, mo_die, m_ignore }
526 0, MAXPARA, MFLG_SLOW, 0,
527 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
528 { m_proto, m_proto, m_proto, m_proto, m_ignore }
533 0, MAXPARA, MFLG_SLOW, 0,
534 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
535 { m_unregistered, m_not_oper, m_ignore, mo_set, m_ignore }
540 0, MAXPARA, MFLG_SLOW, 0,
541 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
542 { m_unregistered, m_not_oper, m_ignore, mo_reset, m_ignore }
547 0, MAXPARA, MFLG_SLOW, 0,
548 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
549 { m_unregistered, m_not_oper, m_ignore, mo_get, m_ignore }
554 0, MAXPARA, MFLG_SLOW, 0,
555 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
556 { m_unregistered, m_not_oper, m_ignore, mo_privs, m_ignore }
558 /* This command is an alias for QUIT during the unregistered part of
559 * of the server. This is because someone jumping via a broken web
560 * proxy will send a 'POST' as their first command - which we will
561 * obviously disconnect them immediately for, stopping people abusing
567 0, MAXPARA, MFLG_SLOW, 0,
568 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
569 { m_quit, m_ignore, m_ignore, m_ignore, m_ignore }
579 static char *para[MAXPARA + 2]; /* leave room for prefix and null */
582 * Message Tree stuff mostly written by orabidoo, with changes by Dianora.
583 * Adapted to Undernet, adding token support, etc by comstud 10/06/97
586 static struct MessageTree msg_tree_cmd;
587 static struct MessageTree msg_tree_tok;
590 * Guts of making the token tree...
592 static struct Message **do_msg_tree_tok(struct MessageTree *mtree, char *prefix,
593 struct Message **mptr)
595 char newprefix[64]; /* Must be longer than every command name */
597 struct MessageTree *mtree1;
600 if (!lp || !strncmp((*mptr)->tok, prefix, lp))
602 if (!mptr[1] || (lp && strncmp(mptr[1]->tok, prefix, lp)))
604 /* last command in the message struct or last command in this prefix */
605 mtree->final = (*mptr)->tok + lp;
607 for (c = 0; c < 26; ++c)
608 mtree->pointers[c] = NULL;
611 /* command in this prefix */
612 if (0 == ircd_strcmp((*mptr)->tok, prefix))
615 mtree->msg = *mptr++;
620 for (c = 'A'; c <= 'Z'; ++c)
622 if ((*mptr)->tok[lp] == c)
624 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
625 mtree1->final = NULL;
626 mtree->pointers[c - 'A'] = mtree1;
627 strcpy(newprefix, prefix);
629 newprefix[lp + 1] = '\0';
630 mptr = do_msg_tree_tok(mtree1, newprefix, mptr);
631 if (!*mptr || strncmp((*mptr)->tok, prefix, lp))
633 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
634 mtree->pointers[c2] = NULL;
639 mtree->pointers[c - 'A'] = NULL;
644 * XXX - should never be here, quick hack, this can be done better
651 * Guts of making the command tree...
653 static struct Message *do_msg_tree_cmd(struct MessageTree *mtree, char *prefix,
654 struct Message *mptr)
656 char newprefix[64]; /* Must be longer than every command name */
658 struct MessageTree *mtree1;
661 if (!lp || !strncmp(mptr->cmd, prefix, lp))
663 if (!mptr[1].cmd || (lp && strncmp(mptr[1].cmd, prefix, lp)))
665 /* last command in the message struct or last command in this prefix */
666 mtree->final = mptr->cmd + lp;
668 for (c = 0; c < 26; ++c)
669 mtree->pointers[c] = NULL;
672 /* command in this prefix */
673 if (0 == ircd_strcmp(mptr->cmd, prefix))
681 for (c = 'A'; c <= 'Z'; ++c)
683 if (mptr->cmd[lp] == c)
685 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
686 mtree1->final = NULL;
687 mtree->pointers[c - 'A'] = mtree1;
688 strcpy(newprefix, prefix);
690 newprefix[lp + 1] = '\0';
691 mptr = do_msg_tree_cmd(mtree1, newprefix, mptr);
692 if (!mptr->cmd || strncmp(mptr->cmd, prefix, lp))
694 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
695 mtree->pointers[c2] = NULL;
700 mtree->pointers[c - 'A'] = NULL;
705 * This should never happen
711 static int mcmdcmp(const struct Message *m1, const struct Message *m2)
713 return strcmp(m1->cmd, m2->cmd);
716 static int mtokcmp(const struct Message **m1, const struct Message **m2)
718 return strcmp((*m1)->tok, (*m2)->tok);
722 * Sort the command names.
723 * Create table of pointers into msgtab for tokens.
724 * Create trees for ->cmd and ->tok and free the token pointers.
726 void initmsgtree(void)
729 struct Message *msg = msgtab;
731 struct Message **msgtab_tok;
732 struct Message **msgtok;
734 for (i = 0; msg->cmd; ++i, ++msg)
736 qsort(msgtab, i, sizeof(struct Message),
737 (int (*)(const void *, const void *))mcmdcmp);
738 msgtab_tok = (struct Message **)MyMalloc((i + 1) * sizeof(struct Message *));
739 for (ii = 0; ii < i; ++ii)
740 msgtab_tok[ii] = msgtab + ii;
741 msgtab_tok[i] = NULL; /* Needed by `do_msg_tree_tok' */
742 qsort(msgtab_tok, i, sizeof(struct Message *),
743 (int (*)(const void *, const void *))mtokcmp);
744 msg = do_msg_tree_cmd(&msg_tree_cmd, "", msgtab);
745 msgtok = do_msg_tree_tok(&msg_tree_tok, "", msgtab_tok);
750 * Generic tree parser which works for both commands and tokens.
753 static struct Message *msg_tree_parse(char *cmd, struct MessageTree *root)
755 struct MessageTree *mtree;
756 unsigned char r = (0xdf & (unsigned char)*cmd) - 'A';
757 if (r > 25 || !(mtree = root->pointers[r]))
761 r = 0xdf & (unsigned char)*++cmd;
762 if (mtree->final && *mtree->final == r)
764 if ((r -= 'A') > 25 || !(mtree = mtree->pointers[r]))
770 * This one is identical to the one above, but it is slower because it
771 * makes sure that `cmd' matches the _full_ command, exactly.
772 * This is to avoid confusion with commands like /quake on clients
773 * that send unknown commands directly to the server.
775 static struct Message *msg_tree_parse_client(char *cmd,
776 struct MessageTree *root)
778 struct MessageTree *mtree;
779 unsigned char q = (0xdf & (unsigned char)*cmd) - 'A';
780 if (q > 25 || !(mtree = root->pointers[q]))
784 q = 0xdf & (unsigned char)*++cmd;
785 if (mtree->final && 0 == ircd_strcmp(mtree->final, cmd))
787 if ((q -= 'A') > 25 || !(mtree = mtree->pointers[q]))
795 * NOTE: parse_*() should not be called recusively by any other fucntions!
797 int parse_client(struct Client *cptr, char *buffer, char *bufend)
799 struct Client* from = cptr;
805 struct Message* mptr;
806 MessageHandler handler = 0;
808 Debug((DEBUG_DEBUG, "Client Parsing: %s", buffer));
813 para[0] = cli_name(from);
814 for (ch = buffer; *ch == ' '; ch++); /* Eat leading spaces */
815 if (*ch == ':') /* Is any client doing this ? */
817 for (++ch; *ch && *ch != ' '; ++ch)
818 ; /* Ignore sender prefix from client */
820 ch++; /* Advance to command */
826 ServerStats->is_empt++;
827 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
828 cli_name(cptr), cli_name(from)));
832 if ((s = strchr(ch, ' ')))
836 * This is a client/unregistered entity.
837 * Check long command list only.
839 if (!(mptr = msg_tree_parse_client(ch, &msg_tree_cmd)))
842 * Note: Give error message *only* to recognized
843 * persons. It's a nightmare situation to have
844 * two programs sending "Unknown command"'s or
845 * equivalent to each other at full blast....
846 * If it has got to person state, it at least
847 * seems to be well behaving. Perhaps this message
848 * should never be generated, though... --msa
849 * Hm, when is the buffer empty -- if a command
850 * code has been found ?? -Armin
852 if (buffer[0] != '\0')
855 send_reply(from, ERR_UNKNOWNCOMMAND, ch);
856 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
857 ch, get_client_name(cptr, HIDE_IP)));
859 ServerStats->is_unco++;
863 paramcount = mptr->parameters;
864 i = bufend - ((s) ? s : ch);
866 if ((mptr->flags & MFLG_SLOW))
867 cli_since(cptr) += (2 + i / 120);
869 * Allow only 1 msg per 2 seconds
870 * (on average) to prevent dumping.
871 * to keep the response rate up,
872 * bursts of up to 5 msgs are allowed
877 * Must the following loop really be so devious? On
878 * surface it splits the message to parameters from
879 * blank spaces. But, if paramcount has been reached,
880 * the rest of the message goes into this last parameter
881 * (about same effect as ":" has...) --msa
884 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
889 if (paramcount > MAXPARA)
890 paramcount = MAXPARA;
894 * Never "FRANCE " again!! ;-) Clean
895 * out *all* blanks.. --msa
905 * The rest is single parameter--can
906 * include blanks also.
914 for (; *s != ' ' && *s; s++);
920 handler = mptr->handlers[cli_handler(cptr)];
921 assert(0 != handler);
923 #ifndef IDLE_FROM_MSG
924 if (IsUser(cptr) && handler != m_ping && handler != m_ignore)
925 cli_user(from)->last = CurrentTime;
928 return (*handler) (cptr, from, i, para);
931 int parse_server(struct Client *cptr, char *buffer, char *bufend)
933 struct Client* from = cptr;
940 struct Message* mptr;
942 Debug((DEBUG_DEBUG, "Server Parsing: %s", buffer));
947 para[0] = cli_name(from);
950 * A server ALWAYS sends a prefix. When it starts with a ':' it's the
951 * protocol 9 prefix: a nick or a server name. Otherwise it's a numeric
956 /* Let para[0] point to the name of the sender */
958 if (!(ch = strchr(ch, ' ')))
962 /* And let `from' point to its client structure,
963 opps.. a server is _also_ a client --Nem */
964 from = FindClient(para[0]);
967 * If the client corresponding to the
968 * prefix is not found. We must ignore it,
969 * it is simply a lagged message travelling
970 * upstream a SQUIT that removed the client
975 Debug((DEBUG_NOTICE, "Unknown prefix (%s)(%s) from (%s)",
976 para[0], buffer, cli_name(cptr)));
977 ++ServerStats->is_unpf;
981 * However, the only thing that MUST be
982 * allowed to travel upstream against an
983 * squit, is an SQUIT itself (the timestamp
984 * protects us from being used wrong)
988 para[0] = cli_name(cptr);
994 else if (cli_from(from) != cptr)
996 ++ServerStats->is_wrdi;
997 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
998 buffer, cli_name(cptr)));
1003 char numeric_prefix[6];
1005 for (i = 0; i < 5; ++i) {
1006 if ('\0' == ch[i] || ' ' == (numeric_prefix[i] = ch[i])) {
1010 numeric_prefix[i] = '\0';
1013 * We got a numeric nick as prefix
1014 * 1 or 2 character prefixes are from servers
1015 * 3 or 5 chars are from clients
1018 protocol_violation(cptr,"Missing Prefix");
1021 else if (' ' == ch[1] || ' ' == ch[2])
1022 from = FindNServer(numeric_prefix);
1024 from = findNUser(numeric_prefix);
1030 while (*ch != ' ' && *ch);
1033 * If the client corresponding to the
1034 * prefix is not found. We must ignore it,
1035 * it is simply a lagged message travelling
1036 * upstream a SQUIT that removed the client
1038 * There turned out to be other reasons that
1039 * a prefix is unknown, needing an upstream
1040 * KILL. Also, next to an SQUIT we better
1041 * allow a KILL to pass too.
1046 ServerStats->is_unpf++;
1049 if (*ch == 'N' && (ch[1] == ' ' || ch[1] == 'I'))
1050 /* Only sent a KILL for a nick change */
1052 struct Client *server;
1053 /* Kill the unknown numeric prefix upstream if
1054 * it's server still exists: */
1055 if ((server = FindNServer(numeric_prefix)) && cli_from(server) == cptr)
1056 sendcmdto_one(&me, CMD_KILL, cptr, "%s :%s (Unknown numeric nick)",
1057 numeric_prefix, cli_name(&me));
1060 * Things that must be allowed to travel
1061 * upstream against an squit:
1063 if (ch[1] == 'Q' || (*ch == 'D' && ch[1] == ' ') ||
1064 (*ch == 'K' && ch[2] == 'L'))
1070 /* Let para[0] point to the name of the sender */
1071 para[0] = cli_name(from);
1073 if (cli_from(from) != cptr)
1075 ServerStats->is_wrdi++;
1076 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
1077 buffer, cli_name(cptr)));
1086 ServerStats->is_empt++;
1087 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
1088 cli_name(cptr), cli_name(from)));
1093 * Extract the command code from the packet. Point s to the end
1094 * of the command code and calculate the length using pointer
1095 * arithmetic. Note: only need length for numerics and *all*
1096 * numerics must have parameters and thus a space after the command
1099 s = strchr(ch, ' '); /* s -> End of the command code */
1100 len = (s) ? (s - ch) : 0;
1101 if (len == 3 && IsDigit(*ch))
1103 numeric = (*ch - '0') * 100 + (*(ch + 1) - '0') * 10 + (*(ch + 2) - '0');
1104 paramcount = 2; /* destination, and the rest of it */
1105 ServerStats->is_num++;
1106 mptr = NULL; /* Init. to avoid stupid compiler warning :/ */
1113 /* Version Receive Send
1115 * 2.10.0 Tkn/Long Long
1116 * 2.10.10 Tkn/Long Tkn
1119 * Clients/unreg servers always receive/
1120 * send long commands -record
1124 * This is a server. Check the token command list.
1125 * -record!jegelhof@cloud9.net
1127 mptr = msg_tree_parse(ch, &msg_tree_tok);
1129 #if 1 /* for 2.10.0/2.10.10 */
1131 * This code supports 2.9 and 2.10.0 sending long commands.
1132 * It makes more calls to ircd_strcmp() than the above
1133 * so it will be somewhat slower.
1136 mptr = msg_tree_parse(ch, &msg_tree_cmd);
1142 * Note: Give error message *only* to recognized
1143 * persons. It's a nightmare situation to have
1144 * two programs sending "Unknown command"'s or
1145 * equivalent to each other at full blast....
1146 * If it has got to person state, it at least
1147 * seems to be well behaving. Perhaps this message
1148 * should never be generated, though... --msa
1149 * Hm, when is the buffer empty -- if a command
1150 * code has been found ?? -Armin
1153 if (buffer[0] != '\0')
1155 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
1156 ch, get_client_name(cptr, HIDE_IP)));
1159 ServerStats->is_unco++;
1163 paramcount = mptr->parameters;
1164 i = bufend - ((s) ? s : ch);
1168 * Must the following loop really be so devious? On
1169 * surface it splits the message to parameters from
1170 * blank spaces. But, if paramcount has been reached,
1171 * the rest of the message goes into this last parameter
1172 * (about same effect as ":" has...) --msa
1175 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
1180 if (paramcount > MAXPARA)
1181 paramcount = MAXPARA;
1185 * Never "FRANCE " again!! ;-) Clean
1186 * out *all* blanks.. --msa
1196 * The rest is single parameter--can
1197 * include blanks also.
1200 para[++i] = s; /* preserve the colon to make do_numeric happy */
1206 if (i >= paramcount)
1208 for (; *s != ' ' && *s; s++);
1213 return (do_numeric(numeric, (*buffer != ':'), cptr, from, i, para));
1216 return (*mptr->handlers[cli_handler(cptr)]) (cptr, from, i, para);