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"
37 #include "querycmds.h"
43 #include "s_numeric.h"
60 struct MessageTree *pointers[26];
64 struct Message msgtab[] = {
68 0, MAXPARA, MFLG_SLOW, 0,
69 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
70 { m_unregistered, m_privmsg, ms_privmsg, mo_privmsg, m_ignore }
75 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
76 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
77 { m_nick, m_nick, ms_nick, m_nick, m_ignore }
82 0, MAXPARA, MFLG_SLOW | MFLG_IGNORE, 0,
83 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
84 { m_ignore, m_notice, ms_notice, mo_notice, m_ignore }
89 0, MAXPARA, MFLG_SLOW, 0,
90 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
91 { m_unregistered, m_wallchops, ms_wallchops, m_wallchops, m_ignore }
96 0, MAXPARA, MFLG_SLOW, 0,
97 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
98 { m_unregistered, m_cprivmsg, m_ignore, m_cprivmsg, m_ignore }
103 0, MAXPARA, MFLG_SLOW, 0,
104 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
105 { m_unregistered, m_cnotice, m_ignore, m_cnotice, m_ignore }
110 0, MAXPARA, MFLG_SLOW, 0,
111 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
112 { m_unregistered, m_join, ms_join, m_join, m_ignore }
117 0, MAXPARA, MFLG_SLOW, 0,
118 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
119 { m_unregistered, m_mode, ms_mode, m_mode, m_ignore }
124 0, MAXPARA, MFLG_SLOW, 0,
125 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
126 { m_ignore, m_ignore, ms_burst, m_ignore, m_ignore }
131 0, MAXPARA, MFLG_SLOW, 0,
132 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
133 { m_ignore, m_ignore, ms_create, m_ignore, m_ignore }
138 0, MAXPARA, MFLG_SLOW, 0,
139 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
140 { m_ignore, m_ignore, ms_destruct, m_ignore, m_ignore }
145 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
146 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
147 { m_quit, m_quit, ms_quit, m_quit, m_ignore }
152 0, MAXPARA, MFLG_SLOW, 0,
153 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
154 { m_unregistered, m_part, ms_part, m_part, m_ignore }
159 0, MAXPARA, MFLG_SLOW, 0,
160 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
161 { m_unregistered, m_topic, ms_topic, m_topic, m_ignore }
166 0, MAXPARA, MFLG_SLOW, 0,
167 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
168 { m_unregistered, m_invite, ms_invite, m_invite, m_ignore }
173 0, MAXPARA, MFLG_SLOW, 0,
174 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
175 { m_unregistered, m_kick, ms_kick, m_kick, m_ignore }
180 0, MAXPARA, MFLG_SLOW, 0,
181 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
182 { m_unregistered, m_not_oper, ms_wallops, mo_wallops, m_ignore }
187 0, MAXPARA, MFLG_SLOW, 0,
188 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
189 { m_ignore, m_ignore, ms_desynch, m_ignore, m_ignore }
194 0, MAXPARA, MFLG_SLOW, 0,
195 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
196 { m_unregistered, m_ping, ms_ping, m_ping, m_ignore }
201 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
202 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
203 { mr_pong, m_pong, ms_pong, m_pong, m_ignore }
208 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
209 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
210 { mr_error, m_ignore, ms_error, m_ignore, m_ignore }
215 0, MAXPARA, MFLG_SLOW, 0,
216 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
217 { m_unregistered, m_not_oper, ms_kill, mo_kill, m_ignore }
222 0, MAXPARA, MFLG_SLOW, 0,
223 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
224 { m_user, m_registered, m_ignore, m_registered, m_ignore }
229 0, MAXPARA, MFLG_SLOW, 0,
230 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
231 { m_unregistered, m_away, ms_away, m_away, m_ignore }
237 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
238 { m_unregistered, m_ison, m_ignore, m_ison, m_ignore }
243 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
244 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
245 { mr_server, m_registered, ms_server, m_registered, m_ignore }
250 0, MAXPARA, MFLG_SLOW, 0,
251 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
252 { m_unregistered, m_not_oper, ms_squit, mo_squit, m_ignore }
257 0, MAXPARA, MFLG_SLOW, 0,
258 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
259 { m_unregistered, m_whois, m_whois, m_whois, m_ignore }
264 0, MAXPARA, MFLG_SLOW, 0,
265 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
266 { m_unregistered, m_who, m_ignore, m_who, m_ignore }
271 0, MAXPARA, MFLG_SLOW, 0,
272 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
273 { m_unregistered, m_whowas, m_whowas, m_whowas, m_ignore }
278 0, MAXPARA, MFLG_SLOW, 0,
279 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
280 { m_unregistered, m_list, m_ignore, m_list, m_ignore }
285 0, MAXPARA, MFLG_SLOW, 0,
286 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
287 { m_unregistered, m_names, ms_names, m_names, m_ignore }
293 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
294 { m_unregistered, m_userhost, m_ignore, m_userhost, m_ignore }
300 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
301 { m_unregistered, m_userip, m_ignore, m_userip, m_ignore }
306 0, MAXPARA, MFLG_SLOW, 0,
307 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
308 { m_unregistered, m_trace, ms_trace, mo_trace, m_ignore }
313 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
314 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
315 { m_pass, m_registered, m_ignore, m_registered, m_ignore }
320 0, MAXPARA, MFLG_SLOW, 0,
321 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
322 { m_unregistered, m_lusers, ms_lusers, m_lusers, m_ignore }
327 0, MAXPARA, MFLG_SLOW, 0,
328 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
329 { m_unregistered, m_time, m_time, m_time, m_ignore }
334 0, MAXPARA, MFLG_SLOW, 0,
335 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
336 { m_unregistered, m_ignore, ms_settime, mo_settime, m_ignore }
341 0, MAXPARA, MFLG_SLOW, 0,
342 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
343 { m_unregistered, m_not_oper, ms_rping, mo_rping, m_ignore }
348 0, MAXPARA, MFLG_SLOW, 0,
349 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
350 { m_unregistered, m_ignore, ms_rpong, m_ignore, m_ignore }
355 0, MAXPARA, MFLG_SLOW, 0,
356 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
357 { m_unregistered, m_oper, ms_oper, mo_oper, m_ignore }
362 0, MAXPARA, MFLG_SLOW, 0,
363 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
364 { m_unregistered, m_not_oper, ms_connect, mo_connect, m_ignore }
369 0, MAXPARA, MFLG_SLOW, 0,
370 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
371 { m_unregistered, m_map, m_ignore, m_map, m_ignore }
376 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
377 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
378 { m_version, m_version, ms_version, m_version, m_ignore }
383 0, MAXPARA, MFLG_SLOW, 0,
384 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
385 { m_unregistered, m_stats, ms_stats, mo_stats, m_ignore }
390 0, MAXPARA, MFLG_SLOW, 0,
391 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
392 { m_unregistered, m_links, ms_links, m_links, m_ignore }
397 0, MAXPARA, MFLG_SLOW | MFLG_UNREG, 0,
398 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
399 { m_admin, m_admin, ms_admin, m_admin, m_ignore }
404 0, MAXPARA, MFLG_SLOW, 0,
405 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
406 { m_unregistered, m_help, m_ignore, m_help, m_ignore }
411 0, MAXPARA, MFLG_SLOW, 0,
412 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
413 { m_unregistered, m_info, ms_info, mo_info, m_ignore }
418 0, MAXPARA, MFLG_SLOW, 0,
419 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
420 { m_unregistered, m_motd, m_motd, m_motd, m_ignore }
425 0, MAXPARA, MFLG_SLOW, 0,
426 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
427 { m_unregistered, m_not_oper, m_ignore, mo_close, m_ignore }
432 0, MAXPARA, MFLG_SLOW, 0,
433 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
434 { m_unregistered, m_silence, ms_silence, m_silence, m_ignore }
439 0, MAXPARA, MFLG_SLOW, 0,
440 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
441 { m_unregistered, m_gline, ms_gline, mo_gline, m_ignore }
446 0, MAXPARA, MFLG_SLOW, 0,
447 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
448 #ifdef CONFIG_OPERCMDS
449 { m_unregistered, m_jupe, ms_jupe, mo_jupe, m_ignore }
451 { m_unregistered, m_jupe, ms_jupe, m_jupe, m_ignore }
452 #endif /* CONFIG_OPERCMDS */
457 0, MAXPARA, MFLG_SLOW, 0,
458 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
459 { m_unregistered, m_not_oper, ms_opmode, mo_opmode, m_ignore }
464 0, MAXPARA, MFLG_SLOW, 0,
465 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
466 { m_unregistered, m_not_oper, ms_clearmode, mo_clearmode, m_ignore }
471 0, MAXPARA, MFLG_SLOW, 0,
472 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
473 { m_unregistered, m_not_oper, ms_uping, mo_uping, m_ignore }
478 0, MAXPARA, MFLG_SLOW, 0,
479 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
480 { m_ignore, m_ignore, ms_end_of_burst, m_ignore, m_ignore }
483 MSG_END_OF_BURST_ACK,
484 TOK_END_OF_BURST_ACK,
486 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
487 { m_ignore, m_ignore, ms_end_of_burst_ack, m_ignore, m_ignore }
492 0, MAXPARA, MFLG_SLOW, 0,
493 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
494 { m_unregistered, m_hash, m_hash, m_hash, m_ignore }
499 0, MAXPARA, MFLG_SLOW, 0,
500 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
501 { m_unregistered, m_dns, m_dns, m_dns, m_ignore }
506 0, MAXPARA, MFLG_SLOW, 0,
507 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
508 { m_unregistered, m_not_oper, m_ignore, mo_rehash, m_ignore }
513 0, MAXPARA, MFLG_SLOW, 0,
514 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
515 { m_unregistered, m_not_oper, m_ignore, mo_restart, m_ignore }
520 0, MAXPARA, MFLG_SLOW, 0,
521 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
522 { m_unregistered, m_not_oper, m_ignore, mo_die, m_ignore }
527 0, MAXPARA, MFLG_SLOW, 0,
528 /* UNREG, CLIENT, SERVER, OPER, SERVICE */
529 { m_proto, m_proto, m_proto, m_proto, m_ignore }
539 static char *para[MAXPARA + 2]; /* leave room for prefix and null */
542 * Message Tree stuff mostly written by orabidoo, with changes by Dianora.
543 * Adapted to Undernet, adding token support, etc by comstud 10/06/97
546 static struct MessageTree msg_tree_cmd;
547 static struct MessageTree msg_tree_tok;
550 * Guts of making the token tree...
552 static struct Message **do_msg_tree_tok(struct MessageTree *mtree, char *prefix,
553 struct Message **mptr)
555 char newprefix[64]; /* Must be longer than every command name */
557 struct MessageTree *mtree1;
560 if (!lp || !strncmp((*mptr)->tok, prefix, lp))
562 if (!mptr[1] || (lp && strncmp(mptr[1]->tok, prefix, lp)))
564 /* last command in the message struct or last command in this prefix */
565 mtree->final = (*mptr)->tok + lp;
567 for (c = 0; c < 26; ++c)
568 mtree->pointers[c] = NULL;
571 /* command in this prefix */
572 if (0 == ircd_strcmp((*mptr)->tok, prefix))
575 mtree->msg = *mptr++;
580 for (c = 'A'; c <= 'Z'; ++c)
582 if ((*mptr)->tok[lp] == c)
584 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
585 mtree1->final = NULL;
586 mtree->pointers[c - 'A'] = mtree1;
587 strcpy(newprefix, prefix);
589 newprefix[lp + 1] = '\0';
590 mptr = do_msg_tree_tok(mtree1, newprefix, mptr);
591 if (!*mptr || strncmp((*mptr)->tok, prefix, lp))
593 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
594 mtree->pointers[c2] = NULL;
599 mtree->pointers[c - 'A'] = NULL;
604 * XXX - should never be here, quick hack, this can be done better
611 * Guts of making the command tree...
613 static struct Message *do_msg_tree_cmd(struct MessageTree *mtree, char *prefix,
614 struct Message *mptr)
616 char newprefix[64]; /* Must be longer than every command name */
618 struct MessageTree *mtree1;
621 if (!lp || !strncmp(mptr->cmd, prefix, lp))
623 if (!mptr[1].cmd || (lp && strncmp(mptr[1].cmd, prefix, lp)))
625 /* last command in the message struct or last command in this prefix */
626 mtree->final = mptr->cmd + lp;
628 for (c = 0; c < 26; ++c)
629 mtree->pointers[c] = NULL;
632 /* command in this prefix */
633 if (0 == ircd_strcmp(mptr->cmd, prefix))
641 for (c = 'A'; c <= 'Z'; ++c)
643 if (mptr->cmd[lp] == c)
645 mtree1 = (struct MessageTree *)MyMalloc(sizeof(struct MessageTree));
646 mtree1->final = NULL;
647 mtree->pointers[c - 'A'] = mtree1;
648 strcpy(newprefix, prefix);
650 newprefix[lp + 1] = '\0';
651 mptr = do_msg_tree_cmd(mtree1, newprefix, mptr);
652 if (!mptr->cmd || strncmp(mptr->cmd, prefix, lp))
654 for (c2 = c + 1 - 'A'; c2 < 26; ++c2)
655 mtree->pointers[c2] = NULL;
660 mtree->pointers[c - 'A'] = NULL;
665 * This should never happen
671 static int mcmdcmp(const struct Message *m1, const struct Message *m2)
673 return strcmp(m1->cmd, m2->cmd);
676 static int mtokcmp(const struct Message **m1, const struct Message **m2)
678 return strcmp((*m1)->tok, (*m2)->tok);
682 * Sort the command names.
683 * Create table of pointers into msgtab for tokens.
684 * Create trees for ->cmd and ->tok and free the token pointers.
686 void initmsgtree(void)
689 struct Message *msg = msgtab;
691 struct Message **msgtab_tok;
692 struct Message **msgtok;
694 for (i = 0; msg->cmd; ++i, ++msg)
696 qsort(msgtab, i, sizeof(struct Message),
697 (int (*)(const void *, const void *))mcmdcmp);
698 msgtab_tok = (struct Message **)MyMalloc((i + 1) * sizeof(struct Message *));
699 for (ii = 0; ii < i; ++ii)
700 msgtab_tok[ii] = msgtab + ii;
701 msgtab_tok[i] = NULL; /* Needed by `do_msg_tree_tok' */
702 qsort(msgtab_tok, i, sizeof(struct Message *),
703 (int (*)(const void *, const void *))mtokcmp);
704 msg = do_msg_tree_cmd(&msg_tree_cmd, "", msgtab);
705 msgtok = do_msg_tree_tok(&msg_tree_tok, "", msgtab_tok);
710 * Generic tree parser which works for both commands and tokens.
713 static struct Message *msg_tree_parse(char *cmd, struct MessageTree *root)
715 struct MessageTree *mtree;
716 unsigned char r = (0xdf & (unsigned char)*cmd) - 'A';
717 if (r > 25 || !(mtree = root->pointers[r]))
721 r = 0xdf & (unsigned char)*++cmd;
722 if (mtree->final && *mtree->final == r)
724 if ((r -= 'A') > 25 || !(mtree = mtree->pointers[r]))
730 * This one is identical to the one above, but it is slower because it
731 * makes sure that `cmd' matches the _full_ command, exactly.
732 * This is to avoid confusion with commands like /quake on clients
733 * that send unknown commands directly to the server.
735 static struct Message *msg_tree_parse_client(char *cmd,
736 struct MessageTree *root)
738 struct MessageTree *mtree;
739 unsigned char q = (0xdf & (unsigned char)*cmd) - 'A';
740 if (q > 25 || !(mtree = root->pointers[q]))
744 q = 0xdf & (unsigned char)*++cmd;
745 if (mtree->final && 0 == ircd_strcmp(mtree->final, cmd))
747 if ((q -= 'A') > 25 || !(mtree = mtree->pointers[q]))
755 * NOTE: parse_*() should not be called recusively by any other fucntions!
757 int parse_client(struct Client *cptr, char *buffer, char *bufend)
759 struct Client* from = cptr;
765 struct Message* mptr;
766 MessageHandler handler = 0;
768 Debug((DEBUG_DEBUG, "Parsing: %s", buffer));
773 para[0] = from->name;
774 for (ch = buffer; *ch == ' '; ch++); /* Eat leading spaces */
775 if (*ch == ':') /* Is any client doing this ? */
777 for (++ch; *ch && *ch != ' '; ++ch)
778 ; /* Ignore sender prefix from client */
780 ch++; /* Advance to command */
786 ServerStats->is_empt++;
787 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
788 cptr->name, from->name));
792 if ((s = strchr(ch, ' ')))
796 * This is a client/unregistered entity.
797 * Check long command list only.
799 if (!(mptr = msg_tree_parse_client(ch, &msg_tree_cmd)))
802 * Note: Give error message *only* to recognized
803 * persons. It's a nightmare situation to have
804 * two programs sending "Unknown command"'s or
805 * equivalent to each other at full blast....
806 * If it has got to person state, it at least
807 * seems to be well behaving. Perhaps this message
808 * should never be generated, though... --msa
809 * Hm, when is the buffer empty -- if a command
810 * code has been found ?? -Armin
812 if (buffer[0] != '\0')
815 send_reply(from, ERR_UNKNOWNCOMMAND, ch);
816 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
817 ch, get_client_name(cptr, HIDE_IP)));
819 ServerStats->is_unco++;
823 paramcount = mptr->parameters;
824 i = bufend - ((s) ? s : ch);
826 if ((mptr->flags & MFLG_SLOW))
827 cptr->since += (2 + i / 120);
829 * Allow only 1 msg per 2 seconds
830 * (on average) to prevent dumping.
831 * to keep the response rate up,
832 * bursts of up to 5 msgs are allowed
837 * Must the following loop really be so devious? On
838 * surface it splits the message to parameters from
839 * blank spaces. But, if paramcount has been reached,
840 * the rest of the message goes into this last parameter
841 * (about same effect as ":" has...) --msa
844 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
849 if (paramcount > MAXPARA)
850 paramcount = MAXPARA;
854 * Never "FRANCE " again!! ;-) Clean
855 * out *all* blanks.. --msa
865 * The rest is single parameter--can
866 * include blanks also.
874 for (; *s != ' ' && *s; s++);
881 * The "unregistered command check" was ugly and mildly inefficient.
882 * I fixed it. :) --Shadow
884 if (!IsUser(cptr) && 0 == (mptr->flags & MFLG_UNREG)) {
885 if (0 == (mptr->flags & MFLG_IGNORE))
886 sendto_one(from, ":%s %d * %s :Register first.", /* XXX DEAD */
887 me.name, ERR_NOTREGISTERED, ch);
891 handler = mptr->handlers[cptr->handler];
892 assert(0 != handler);
894 #ifndef IDLE_FROM_MSG
895 if (IsUser(cptr) && handler != m_ping && handler != m_ignore)
896 from->user->last = CurrentTime;
899 return (*handler) (cptr, from, i, para);
902 int parse_server(struct Client *cptr, char *buffer, char *bufend)
904 struct Client* from = cptr;
911 struct Message* mptr;
913 Debug((DEBUG_DEBUG, "Parsing: %s", buffer));
916 len = strlen(buffer);
920 char c = buffer[200];
922 sendto_ops("RCV:%-8.8s(%.4d): \"%s...%s\"",
923 cptr->name, len, buffer, &buffer[len - 200]);
927 sendto_ops("RCV:%-8.8s(%.4d): \"%s\"", cptr->name, len, buffer);
934 para[0] = from->name;
937 * A server ALWAYS sends a prefix. When it starts with a ':' it's the
938 * protocol 9 prefix: a nick or a server name. Otherwise it's a numeric
943 /* Let para[0] point to the name of the sender */
945 if (!(ch = strchr(ch, ' ')))
949 /* And let `from' point to its client structure,
950 opps.. a server is _also_ a client --Nem */
951 from = FindClient(para[0]);
954 * If the client corresponding to the
955 * prefix is not found. We must ignore it,
956 * it is simply a lagged message travelling
957 * upstream a SQUIT that removed the client
962 Debug((DEBUG_NOTICE, "Unknown prefix (%s)(%s) from (%s)",
963 para[0], buffer, cptr->name));
964 ++ServerStats->is_unpf;
968 * However, the only thing that MUST be
969 * allowed to travel upstream against an
970 * squit, is an SQUIT itself (the timestamp
971 * protects us from being used wrong)
975 para[0] = cptr->name;
981 else if (from->from != cptr)
983 ++ServerStats->is_wrdi;
984 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
985 buffer, cptr->name));
989 else if (Protocol(cptr) > 9) /* Well, not ALWAYS, 2.9 can send no prefix */
991 char numeric_prefix[6];
993 for (i = 0; i < 5; ++i) {
994 if ('\0' == ch[i] || ' ' == (numeric_prefix[i] = ch[i])) {
998 numeric_prefix[i] = '\0';
1000 * We got a numeric nick as prefix
1001 * 1 or 2 character prefixes are from servers
1002 * 3 or 5 chars are from clients
1004 if (' ' == ch[1] || ' ' == ch[2])
1005 from = FindNServer(numeric_prefix);
1007 from = findNUser(numeric_prefix);
1013 while (*ch != ' ' && *ch);
1016 * If the client corresponding to the
1017 * prefix is not found. We must ignore it,
1018 * it is simply a lagged message travelling
1019 * upstream a SQUIT that removed the client
1021 * There turned out to be other reasons that
1022 * a prefix is unknown, needing an upstream
1023 * KILL. Also, next to an SQUIT we better
1024 * allow a KILL to pass too.
1029 ServerStats->is_unpf++;
1032 if (*ch == 'N' && (ch[1] == ' ' || ch[1] == 'I'))
1033 /* Only sent a KILL for a nick change */
1035 struct Client *server;
1036 /* Kill the unknown numeric prefix upstream if
1037 * it's server still exists: */
1038 if ((server = FindNServer(numeric_prefix)) && server->from == cptr)
1039 sendcmdto_one(&me, CMD_KILL, cptr, "%s :%s (Unknown numeric nick)",
1040 numeric_prefix, me.name);
1043 * Things that must be allowed to travel
1044 * upstream against an squit:
1046 if (ch[1] == 'Q' || (*ch == 'D' && ch[1] == ' ') ||
1047 (*ch == 'K' && ch[2] == 'L'))
1053 /* Let para[0] point to the name of the sender */
1054 para[0] = from->name;
1056 if (from->from != cptr)
1058 ServerStats->is_wrdi++;
1059 Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
1060 buffer, cptr->name));
1069 ServerStats->is_empt++;
1070 Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
1071 cptr->name, from->name));
1076 * Extract the command code from the packet. Point s to the end
1077 * of the command code and calculate the length using pointer
1078 * arithmetic. Note: only need length for numerics and *all*
1079 * numerics must have parameters and thus a space after the command
1082 s = strchr(ch, ' '); /* s -> End of the command code */
1083 len = (s) ? (s - ch) : 0;
1084 if (len == 3 && IsDigit(*ch))
1086 numeric = (*ch - '0') * 100 + (*(ch + 1) - '0') * 10 + (*(ch + 2) - '0');
1087 paramcount = MAXPARA;
1088 ServerStats->is_num++;
1089 mptr = NULL; /* Init. to avoid stupid compiler warning :/ */
1096 /* Version Receive Send
1098 * 2.10.0 Tkn/Long Long
1099 * 2.10.10 Tkn/Long Tkn
1102 * Clients/unreg servers always receive/
1103 * send long commands -record
1107 * This is a server. Check the token command list.
1108 * -record!jegelhof@cloud9.net
1110 mptr = msg_tree_parse(ch, &msg_tree_tok);
1112 #if 1 /* for 2.10.0/2.10.10 */
1114 * This code supports 2.9 and 2.10.0 sending long commands.
1115 * It makes more calls to ircd_strcmp() than the above
1116 * so it will be somewhat slower.
1119 mptr = msg_tree_parse(ch, &msg_tree_cmd);
1125 * Note: Give error message *only* to recognized
1126 * persons. It's a nightmare situation to have
1127 * two programs sending "Unknown command"'s or
1128 * equivalent to each other at full blast....
1129 * If it has got to person state, it at least
1130 * seems to be well behaving. Perhaps this message
1131 * should never be generated, though... --msa
1132 * Hm, when is the buffer empty -- if a command
1133 * code has been found ?? -Armin
1136 if (buffer[0] != '\0')
1138 Debug((DEBUG_ERROR, "Unknown (%s) from %s",
1139 ch, get_client_name(cptr, HIDE_IP)));
1142 ServerStats->is_unco++;
1146 paramcount = mptr->parameters;
1147 i = bufend - ((s) ? s : ch);
1151 * Must the following loop really be so devious? On
1152 * surface it splits the message to parameters from
1153 * blank spaces. But, if paramcount has been reached,
1154 * the rest of the message goes into this last parameter
1155 * (about same effect as ":" has...) --msa
1158 /* Note initially true: s==NULL || *(s-1) == '\0' !! */
1163 if (paramcount > MAXPARA)
1164 paramcount = MAXPARA;
1168 * Never "FRANCE " again!! ;-) Clean
1169 * out *all* blanks.. --msa
1179 * The rest is single parameter--can
1180 * include blanks also.
1186 if (i >= paramcount)
1188 for (; *s != ' ' && *s; s++);
1193 return (do_numeric(numeric, (*buffer != ':'), cptr, from, i, para));
1196 return (*mptr->handlers[cptr->handler]) (cptr, from, i, para);