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_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_ignore, ms_pong, m_ignore, m_ignore }
207 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
208 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
209 { mr_error, 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 { m_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 */
356 { m_unregistered, m_oper, ms_oper, mo_oper, m_ignore }
361 0, MAXPARA, MFLG_SLOW, 0,
362 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
363 { m_unregistered, m_not_oper, ms_connect, mo_connect, m_ignore }
368 0, MAXPARA, MFLG_SLOW, 0,
369 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
370 { m_unregistered, m_map, m_ignore, m_map, m_ignore }
375 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
376 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
377 { m_version, m_version, ms_version, m_version, m_ignore }
382 0, MAXPARA, MFLG_SLOW, 0,
383 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
384 { m_unregistered, m_stats, ms_stats, mo_stats, m_ignore }
389 0, MAXPARA, MFLG_SLOW, 0,
390 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
391 { m_unregistered, m_links, ms_links, m_links, m_ignore }
396 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
397 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
398 { m_admin, m_admin, ms_admin, m_admin, m_ignore }
403 0, MAXPARA, MFLG_SLOW, 0,
404 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
405 { m_unregistered, m_help, m_ignore, m_help, m_ignore }
410 0, MAXPARA, MFLG_SLOW, 0,
411 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
412 { m_unregistered, m_info, ms_info, mo_info, m_ignore }
417 0, MAXPARA, MFLG_SLOW, 0,
418 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
419 { m_unregistered, m_motd, m_motd, m_motd, m_ignore }
424 0, MAXPARA, MFLG_SLOW, 0,
425 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
426 { m_unregistered, m_not_oper, m_ignore, mo_close, m_ignore }
431 0, MAXPARA, MFLG_SLOW, 0,
432 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
433 { m_unregistered, m_silence, ms_silence, m_silence, m_ignore }
438 0, MAXPARA, MFLG_SLOW, 0,
439 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
440 { m_unregistered, m_not_oper, ms_gline, mo_gline, m_ignore }
445 0, MAXPARA, MFLG_SLOW, 0,
446 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
447 { m_ignore, m_ignore, ms_end_of_burst, m_ignore, m_ignore }
450 MSG_END_OF_BURST_ACK,
451 TOK_END_OF_BURST_ACK,
453 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
454 { m_ignore, m_ignore, ms_end_of_burst_ack, m_ignore, m_ignore }
459 0, MAXPARA, MFLG_SLOW, 0,
460 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
461 { m_unregistered, m_hash, m_hash, m_hash, m_ignore }
466 0, MAXPARA, MFLG_SLOW, 0,
467 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
468 { m_unregistered, m_dns, m_dns, m_dns, m_ignore }
473 0, MAXPARA, MFLG_SLOW, 0,
474 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
475 { m_unregistered, m_not_oper, m_ignore, mo_rehash, m_ignore }
480 0, MAXPARA, MFLG_SLOW, 0,
481 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
482 { m_unregistered, m_not_oper, m_ignore, mo_restart, m_ignore }
487 0, MAXPARA, MFLG_SLOW, 0,
488 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
489 { m_unregistered, m_not_oper, m_ignore, mo_die, m_ignore }
494 0, MAXPARA, MFLG_SLOW, 0,
495 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
496 { m_proto, m_proto, m_proto, m_proto, m_ignore }
506 static char *para[MAXPARA + 2]; /* leave room for prefix and null */
509 * Message Tree stuff mostly written by orabidoo, with changes by Dianora.
510 * Adapted to Undernet, adding token support, etc by comstud 10/06/97
513 static struct MessageTree msg_tree_cmd;
514 static struct MessageTree msg_tree_tok;
517 * Guts of making the token tree...
519 static struct Message **do_msg_tree_tok(struct MessageTree *mtree, char *prefix,
520 struct Message **mptr)
522 char newprefix[64]; /* Must be longer than every command name */
524 struct MessageTree *mtree1;
527 if (!lp || !strncmp((*mptr)->tok, prefix, lp))
529 if (!mptr[1] || (lp && strncmp(mptr[1]->tok, prefix, lp)))
531 /* last command in the message struct or last command in this prefix */
532 mtree->final = (*mptr)->tok + lp;
534 for (c = 0; c < 26; ++c)
535 mtree->pointers[c] = NULL;
538 /* command in this prefix */
539 if (0 == ircd_strcmp((*mptr)->tok, prefix))
542 mtree->msg = *mptr++;
547 for (c = 'A'; c <= 'Z'; ++c)
549 if ((*mptr)->tok[lp] == c)
551 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
552 mtree1->final = NULL;
553 mtree->pointers[c - 'A'] = mtree1;
554 strcpy(newprefix, prefix);
556 newprefix[lp + 1] = '\0';
557 mptr = do_msg_tree_tok(mtree1, newprefix, mptr);
558 if (!*mptr || strncmp((*mptr)->tok, prefix, lp))
560 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
561 mtree->pointers[c2] = NULL;
566 mtree->pointers[c - 'A'] = NULL;
571 * XXX - should never be here, quick hack, this can be done better
578 * Guts of making the command tree...
580 static struct Message *do_msg_tree_cmd(struct MessageTree *mtree, char *prefix,
581 struct Message *mptr)
583 char newprefix[64]; /* Must be longer than every command name */
585 struct MessageTree *mtree1;
588 if (!lp || !strncmp(mptr->cmd, prefix, lp))
590 if (!mptr[1].cmd || (lp && strncmp(mptr[1].cmd, prefix, lp)))
592 /* last command in the message struct or last command in this prefix */
593 mtree->final = mptr->cmd + lp;
595 for (c = 0; c < 26; ++c)
596 mtree->pointers[c] = NULL;
599 /* command in this prefix */
600 if (0 == ircd_strcmp(mptr->cmd, prefix))
608 for (c = 'A'; c <= 'Z'; ++c)
610 if (mptr->cmd[lp] == c)
612 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
613 mtree1->final = NULL;
614 mtree->pointers[c - 'A'] = mtree1;
615 strcpy(newprefix, prefix);
617 newprefix[lp + 1] = '\0';
618 mptr = do_msg_tree_cmd(mtree1, newprefix, mptr);
619 if (!mptr->cmd || strncmp(mptr->cmd, prefix, lp))
621 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
622 mtree->pointers[c2] = NULL;
627 mtree->pointers[c - 'A'] = NULL;
632 * This should never happen
638 static int mcmdcmp(const struct Message *m1, const struct Message *m2)
640 return strcmp(m1->cmd, m2->cmd);
643 static int mtokcmp(const struct Message **m1, const struct Message **m2)
645 return strcmp((*m1)->tok, (*m2)->tok);
649 * Sort the command names.
650 * Create table of pointers into msgtab for tokens.
651 * Create trees for ->cmd and ->tok and free the token pointers.
653 void initmsgtree(void)
656 struct Message *msg = msgtab;
658 struct Message **msgtab_tok;
659 struct Message **msgtok;
661 for (i = 0; msg->cmd; ++i, ++msg)
663 qsort(msgtab, i, sizeof(struct Message),
664 (int (*)(const void *, const void *))mcmdcmp);
665 msgtab_tok = (struct Message **)MyMalloc((i + 1) * sizeof(struct Message *));
666 for (ii = 0; ii < i; ++ii)
667 msgtab_tok[ii] = msgtab + ii;
668 msgtab_tok[i] = NULL; /* Needed by `do_msg_tree_tok' */
669 qsort(msgtab_tok, i, sizeof(struct Message *),
670 (int (*)(const void *, const void *))mtokcmp);
671 msg = do_msg_tree_cmd(&msg_tree_cmd, "", msgtab);
672 msgtok = do_msg_tree_tok(&msg_tree_tok, "", msgtab_tok);
677 * Generic tree parser which works for both commands and tokens.
680 static struct Message *msg_tree_parse(char *cmd, struct MessageTree *root)
682 struct MessageTree *mtree;
683 unsigned char r = (0xdf & (unsigned char)*cmd) - 'A';
684 if (r > 25 || !(mtree = root->pointers[r]))
688 r = 0xdf & (unsigned char)*++cmd;
689 if (mtree->final && *mtree->final == r)
691 if ((r -= 'A') > 25 || !(mtree = mtree->pointers[r]))
697 * This one is identical to the one above, but it is slower because it
698 * makes sure that `cmd' matches the _full_ command, exactly.
699 * This is to avoid confusion with commands like /quake on clients
700 * that send unknown commands directly to the server.
702 static struct Message *msg_tree_parse_client(char *cmd,
703 struct MessageTree *root)
705 struct MessageTree *mtree;
706 unsigned char q = (0xdf & (unsigned char)*cmd) - 'A';
707 if (q > 25 || !(mtree = root->pointers[q]))
711 q = 0xdf & (unsigned char)*++cmd;
712 if (mtree->final && 0 == ircd_strcmp(mtree->final, cmd))
714 if ((q -= 'A') > 25 || !(mtree = mtree->pointers[q]))
722 * NOTE: parse_*() should not be called recusively by any other fucntions!
724 int parse_client(struct Client *cptr, char *buffer, char *bufend)
726 struct Client* from = cptr;
732 struct Message* mptr;
733 MessageHandler handler = 0;
735 Debug((DEBUG_DEBUG, "Parsing: %s", buffer));
740 para[0] = from->name;
741 for (ch = buffer; *ch == ' '; ch++); /* Eat leading spaces */
742 if (*ch == ':') /* Is any client doing this ? */
744 for (++ch; *ch && *ch != ' '; ++ch)
745 ; /* Ignore sender prefix from client */
747 ch++; /* Advance to command */
753 ServerStats->is_empt++;
754 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
755 cptr->name, from->name));
759 if ((s = strchr(ch, ' ')))
763 * This is a client/unregistered entity.
764 * Check long command list only.
766 if (!(mptr = msg_tree_parse_client(ch, &msg_tree_cmd)))
769 * Note: Give error message *only* to recognized
770 * persons. It's a nightmare situation to have
771 * two programs sending "Unknown command"'s or
772 * equivalent to each other at full blast....
773 * If it has got to person state, it at least
774 * seems to be well behaving. Perhaps this message
775 * should never be generated, though... --msa
776 * Hm, when is the buffer empty -- if a command
777 * code has been found ?? -Armin
779 if (buffer[0] != '\0')
782 sendto_one(from, ":%s %d %s %s :Unknown command",
783 me.name, ERR_UNKNOWNCOMMAND, from->name, ch);
784 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
785 ch, get_client_name(cptr, HIDE_IP)));
787 ServerStats->is_unco++;
791 paramcount = mptr->parameters;
792 i = bufend - ((s) ? s : ch);
794 if ((mptr->flags & MFLG_SLOW))
795 cptr->since += (2 + i / 120);
797 * Allow only 1 msg per 2 seconds
798 * (on average) to prevent dumping.
799 * to keep the response rate up,
800 * bursts of up to 5 msgs are allowed
805 * Must the following loop really be so devious? On
806 * surface it splits the message to parameters from
807 * blank spaces. But, if paramcount has been reached,
808 * the rest of the message goes into this last parameter
809 * (about same effect as ":" has...) --msa
812 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
817 if (paramcount > MAXPARA)
818 paramcount = MAXPARA;
822 * Never "FRANCE " again!! ;-) Clean
823 * out *all* blanks.. --msa
833 * The rest is single parameter--can
834 * include blanks also.
842 for (; *s != ' ' && *s; s++);
849 * The "unregistered command check" was ugly and mildly inefficient.
850 * I fixed it. :) --Shadow
852 if (!IsUser(cptr) && 0 == (mptr->flags & MFLG_UNREG)) {
853 if (0 == (mptr->flags & MFLG_IGNORE))
854 sendto_one(from, ":%s %d * %s :Register first.",
855 me.name, ERR_NOTREGISTERED, ch);
859 handler = mptr->handlers[cptr->handler];
860 assert(0 != handler);
862 #ifndef IDLE_FROM_MSG
863 if (IsUser(cptr) && handler != m_ping && handler != m_ignore)
864 from->user->last = CurrentTime;
867 return (*handler) (cptr, from, i, para);
870 int parse_server(struct Client *cptr, char *buffer, char *bufend)
872 struct Client* from = cptr;
879 struct Message* mptr;
881 Debug((DEBUG_DEBUG, "Parsing: %s", buffer));
884 len = strlen(buffer);
888 char c = buffer[200];
890 sendto_ops("RCV:%-8.8s(%.4d): \"%s...%s\"",
891 cptr->name, len, buffer, &buffer[len - 200]);
895 sendto_ops("RCV:%-8.8s(%.4d): \"%s\"", cptr->name, len, buffer);
902 para[0] = from->name;
905 * A server ALWAYS sends a prefix. When it starts with a ':' it's the
906 * protocol 9 prefix: a nick or a server name. Otherwise it's a numeric
911 /* Let para[0] point to the name of the sender */
913 if (!(ch = strchr(ch, ' ')))
917 /* And let `from' point to its client structure,
918 opps.. a server is _also_ a client --Nem */
919 from = FindClient(para[0]);
922 * If the client corresponding to the
923 * prefix is not found. We must ignore it,
924 * it is simply a lagged message travelling
925 * upstream a SQUIT that removed the client
930 Debug((DEBUG_NOTICE, "Unknown prefix (%s)(%s) from (%s)",
931 para[0], buffer, cptr->name));
932 ++ServerStats->is_unpf;
936 * However, the only thing that MUST be
937 * allowed to travel upstream against an
938 * squit, is an SQUIT itself (the timestamp
939 * protects us from being used wrong)
943 para[0] = cptr->name;
949 else if (from->from != cptr)
951 ++ServerStats->is_wrdi;
952 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
953 buffer, cptr->name));
957 else if (Protocol(cptr) > 9) /* Well, not ALWAYS, 2.9 can send no prefix */
959 char numeric_prefix[6];
961 for (i = 0; i < 5; ++i) {
962 if ('\0' == ch[i] || ' ' == (numeric_prefix[i] = ch[i])) {
966 numeric_prefix[i] = '\0';
968 * We got a numeric nick as prefix
969 * 1 or 2 character prefixes are from servers
970 * 3 or 5 chars are from clients
972 if (' ' == ch[1] || ' ' == ch[2])
973 from = FindNServer(numeric_prefix);
975 from = findNUser(numeric_prefix);
981 while (*ch != ' ' && *ch);
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
989 * There turned out to be other reasons that
990 * a prefix is unknown, needing an upstream
991 * KILL. Also, next to an SQUIT we better
992 * allow a KILL to pass too.
997 ServerStats->is_unpf++;
1000 if (*ch == 'N' && (ch[1] == ' ' || ch[1] == 'I'))
1001 /* Only sent a KILL for a nick change */
1003 struct Client *server;
1004 /* Kill the unknown numeric prefix upstream if
1005 * it's server still exists: */
1006 if ((server = FindNServer(numeric_prefix)) && server->from == cptr)
1007 sendto_one(cptr, "%s KILL %s :%s (Unknown numeric nick)",
1008 NumServ(&me), numeric_prefix, me.name);
1011 * Things that must be allowed to travel
1012 * upstream against an squit:
1014 if (ch[1] == 'Q' || (*ch == 'D' && ch[1] == ' ') ||
1015 (*ch == 'K' && ch[2] == 'L'))
1021 /* Let para[0] point to the name of the sender */
1022 para[0] = from->name;
1024 if (from->from != cptr)
1026 ServerStats->is_wrdi++;
1027 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
1028 buffer, cptr->name));
1037 ServerStats->is_empt++;
1038 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
1039 cptr->name, from->name));
1044 * Extract the command code from the packet. Point s to the end
1045 * of the command code and calculate the length using pointer
1046 * arithmetic. Note: only need length for numerics and *all*
1047 * numerics must have parameters and thus a space after the command
1050 s = strchr(ch, ' '); /* s -> End of the command code */
1051 len = (s) ? (s - ch) : 0;
1052 if (len == 3 && IsDigit(*ch))
1054 numeric = (*ch - '0') * 100 + (*(ch + 1) - '0') * 10 + (*(ch + 2) - '0');
1055 paramcount = MAXPARA;
1056 ServerStats->is_num++;
1057 mptr = NULL; /* Init. to avoid stupid compiler warning :/ */
1064 /* Version Receive Send
1066 * 2.10.0 Tkn/Long Long
1067 * 2.10.10 Tkn/Long Tkn
1070 * Clients/unreg servers always receive/
1071 * send long commands -record
1075 * This is a server. Check the token command list.
1076 * -record!jegelhof@cloud9.net
1078 mptr = msg_tree_parse(ch, &msg_tree_tok);
1080 #if 1 /* for 2.10.0/2.10.10 */
1082 * This code supports 2.9 and 2.10.0 sending long commands.
1083 * It makes more calls to ircd_strcmp() than the above
1084 * so it will be somewhat slower.
1087 mptr = msg_tree_parse(ch, &msg_tree_cmd);
1093 * Note: Give error message *only* to recognized
1094 * persons. It's a nightmare situation to have
1095 * two programs sending "Unknown command"'s or
1096 * equivalent to each other at full blast....
1097 * If it has got to person state, it at least
1098 * seems to be well behaving. Perhaps this message
1099 * should never be generated, though... --msa
1100 * Hm, when is the buffer empty -- if a command
1101 * code has been found ?? -Armin
1104 if (buffer[0] != '\0')
1106 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
1107 ch, get_client_name(cptr, HIDE_IP)));
1110 ServerStats->is_unco++;
1114 paramcount = mptr->parameters;
1115 i = bufend - ((s) ? s : ch);
1119 * Must the following loop really be so devious? On
1120 * surface it splits the message to parameters from
1121 * blank spaces. But, if paramcount has been reached,
1122 * the rest of the message goes into this last parameter
1123 * (about same effect as ":" has...) --msa
1126 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
1131 if (paramcount > MAXPARA)
1132 paramcount = MAXPARA;
1136 * Never "FRANCE " again!! ;-) Clean
1137 * out *all* blanks.. --msa
1147 * The rest is single parameter--can
1148 * include blanks also.
1154 if (i >= paramcount)
1156 for (; *s != ' ' && *s; s++);
1161 return (do_numeric(numeric, (*buffer != ':'), cptr, from, i, para));
1164 return (*mptr->handlers[cptr->handler]) (cptr, from, i, para);