2 * IRC - Internet Relay Chat, ircd/s_user.c (formerly ircd/s_msg.c)
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 * @brief Miscellaneous user-related helper functions.
36 #include "ircd_alloc.h"
37 #include "ircd_auth.h"
38 #include "ircd_chattr.h"
39 #include "ircd_features.h"
41 #include "ircd_reply.h"
42 #include "ircd_snprintf.h"
43 #include "ircd_string.h"
52 #include "querycmds.h"
58 #include "s_serv.h" /* max_client_count */
61 #include "supported.h"
67 #include "handlers.h" /* m_motd and m_lusers */
69 /* #include <assert.h> -- Now using assert in ircd_log.h */
76 /** Count of allocated User structures. */
77 static int userCount = 0;
79 /** Makes sure that \a cptr has a User information block.
80 * If cli_user(cptr) != NULL, does nothing.
81 * @param[in] cptr Client to attach User struct to.
82 * @return User struct associated with \a cptr.
84 struct User *make_user(struct Client *cptr)
88 if (!cli_user(cptr)) {
89 cli_user(cptr) = (struct User*) MyMalloc(sizeof(struct User));
90 assert(0 != cli_user(cptr));
92 /* All variables are 0 by default */
93 memset(cli_user(cptr), 0, sizeof(struct User));
97 cli_user(cptr)->refcnt = 1;
99 return cli_user(cptr);
102 /** Dereference \a user.
103 * User structures are reference-counted; if the refcount of \a user
104 * becomes zero, free it.
105 * @param[in] user User to dereference.
107 void free_user(struct User* user)
110 assert(0 < user->refcnt);
112 if (--user->refcnt == 0) {
118 assert(0 == user->joined);
119 assert(0 == user->invited);
120 assert(0 == user->channel);
129 /** Find number of User structs allocated and memory used by them.
130 * @param[out] count_out Receives number of User structs allocated.
131 * @param[out] bytes_out Receives number of bytes used by User structs.
133 void user_count_memory(size_t* count_out, size_t* bytes_out)
135 assert(0 != count_out);
136 assert(0 != bytes_out);
137 *count_out = userCount;
138 *bytes_out = userCount * sizeof(struct User);
142 /** Find the next client (starting at \a next) with a name that matches \a ch.
143 * Normal usage loop is:
144 * for (x = client; x = next_client(x,mask); x = x->next)
145 * HandleMatchingClient;
147 * @param[in] next First client to check.
148 * @param[in] ch Name mask to check against.
149 * @return Next matching client found, or NULL if none.
151 struct Client *next_client(struct Client *next, const char* ch)
153 struct Client *tmp = next;
158 next = FindClient(ch);
159 next = next ? next : tmp;
160 if (cli_prev(tmp) == next)
164 for (; next; next = cli_next(next))
165 if (!match(ch, cli_name(next)))
170 /** Find the destination server for a command, and forward it if that is not us.
172 * \a server may be a nickname, server name, server mask (if \a from
173 * is a local user) or server numnick (if \a is a server or remote
176 * @param[in] from Client that sent the command to us.
177 * @param[in] cmd Long-form command text.
178 * @param[in] tok Token-form command text.
179 * @param[in] one Client that originated the command (ignored).
180 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
181 * @param[in] pattern Format string of arguments to command.
182 * @param[in] server Index of target name or mask in \a parv.
183 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
184 * @param[in] parv Array of arguments to command.
185 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
187 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
188 struct Client *one, int MustBeOper, const char *pattern,
189 int server, int parc, char *parv[])
191 struct Client *acptr;
194 /* Assume it's me, if no server or an unregistered client */
195 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
196 return (HUNTED_ISME);
198 if (MustBeOper && !IsPrivileged(from))
200 send_reply(from, ERR_NOPRIVILEGES);
201 return HUNTED_NOSUCH;
204 /* Make sure it's a server */
206 /* Make sure it's a server */
207 if (!strchr(to, '*')) {
208 if (0 == (acptr = FindClient(to))) {
209 send_reply(from, ERR_NOSUCHSERVER, to);
210 return HUNTED_NOSUCH;
214 acptr = cli_user(acptr)->server;
215 } else if (!(acptr = find_match_server(to))) {
216 send_reply(from, ERR_NOSUCHSERVER, to);
217 return (HUNTED_NOSUCH);
219 } else if (!(acptr = FindNServer(to))) {
220 send_reply(from, SND_EXPLICIT | ERR_NOSUCHSERVER, "* :Server has disconnected");
221 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
225 return (HUNTED_ISME);
227 if (MustBeOper && !IsPrivileged(from)) {
228 send_reply(from, ERR_NOPRIVILEGES);
229 return HUNTED_NOSUCH;
232 /* assert(!IsServer(from)); */
234 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
236 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
237 parv[4], parv[5], parv[6], parv[7], parv[8]);
239 return (HUNTED_PASS);
242 /** Find the destination server for a command, and forward it (as a
243 * high-priority command) if that is not us.
245 * \a server may be a nickname, server name, server mask (if \a from
246 * is a local user) or server numnick (if \a is a server or remote
248 * Unlike hunt_server_cmd(), this appends the message to the
249 * high-priority message queue for the destination server.
251 * @param[in] from Client that sent the command to us.
252 * @param[in] cmd Long-form command text.
253 * @param[in] tok Token-form command text.
254 * @param[in] one Client that originated the command (ignored).
255 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
256 * @param[in] pattern Format string of arguments to command.
257 * @param[in] server Index of target name or mask in \a parv.
258 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
259 * @param[in] parv Array of arguments to command.
260 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
262 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
263 struct Client *one, int MustBeOper,
264 const char *pattern, int server, int parc,
267 struct Client *acptr;
270 /* Assume it's me, if no server or an unregistered client */
271 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
272 return (HUNTED_ISME);
274 /* Make sure it's a server */
276 /* Make sure it's a server */
277 if (!strchr(to, '*')) {
278 if (0 == (acptr = FindClient(to))) {
279 send_reply(from, ERR_NOSUCHSERVER, to);
280 return HUNTED_NOSUCH;
284 acptr = cli_user(acptr)->server;
285 } else if (!(acptr = find_match_server(to))) {
286 send_reply(from, ERR_NOSUCHSERVER, to);
287 return (HUNTED_NOSUCH);
289 } else if (!(acptr = FindNServer(to)))
290 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
293 return (HUNTED_ISME);
295 if (MustBeOper && !IsPrivileged(from)) {
296 send_reply(from, ERR_NOPRIVILEGES);
297 return HUNTED_NOSUCH;
300 /* assert(!IsServer(from)); SETTIME to particular destinations permitted */
302 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
304 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
305 parv[4], parv[5], parv[6], parv[7], parv[8]);
307 return (HUNTED_PASS);
311 /** Copy a cleaned-up version of a username.
312 * Replace all instances of '~' and "invalid" username characters
313 * (!isIrcUi()) with underscores, truncating at USERLEN or the first
314 * control character. \a dest and \a source may be the same buffer.
315 * @param[out] dest Destination buffer.
316 * @param[in] source Source buffer.
317 * @param[in] tilde If non-zero, prepend a '~' to \a dest.
319 static char *clean_user_id(char *dest, char *source, int tilde)
326 ch = *s++; /* Store first character to copy: */
329 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
332 while (ch && !IsCntrl(ch) && rlen--)
334 char nch = *s++; /* Store next character to copy */
335 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
348 * This function is called when both NICK and USER messages
349 * have been accepted for the client, in whatever order. Only
350 * after this the USER message is propagated.
352 * NICK's must be propagated at once when received, although
353 * it would be better to delay them too until full info is
354 * available. Doing it is not so simple though, would have
355 * to implement the following:
357 * 1) user telnets in and gives only "NICK foobar" and waits
358 * 2) another user far away logs in normally with the nick
359 * "foobar" (quite legal, as this server didn't propagate it).
360 * 3) now this server gets nick "foobar" from outside, but
361 * has already the same defined locally. Current server
362 * would just issue "KILL foobar" to clean out dups. But,
363 * this is not fair. It should actually request another
364 * nick from local user or kill him/her...
366 /** Finish registering a user who has sent both NICK and USER.
367 * For local connections, possibly check IAuth; make sure there is a
368 * matching Client config block; clean the username field; check
369 * K/k-lines; check for "hacked" looking usernames; assign a numnick;
370 * and send greeting (WELCOME, ISUPPORT, MOTD, etc).
371 * For all connections, update the invisible user and operator counts;
372 * run IPcheck against their address; and forward the NICK.
374 * @param[in] cptr Client who introduced the user.
375 * @param[in,out] sptr Client who has been fully introduced.
376 * @param[in] nick Client's new nickname.
377 * @param[in] username Client's username.
378 * @return Zero or CPTR_KILLED.
380 int register_user(struct Client *cptr, struct Client *sptr,
381 const char *nick, char *username)
383 struct ConfItem* aconf;
387 char c = 0; /* not alphanum */
388 char d = 'a'; /* not a digit */
396 short digitgroups = 0;
397 struct User* user = cli_user(sptr);
401 user->last = CurrentTime;
402 parv[0] = cli_name(sptr);
403 parv[1] = parv[2] = NULL;
407 static time_t last_too_many1;
408 static time_t last_too_many2;
410 assert(cptr == sptr);
411 assert(cli_unreg(sptr) == 0);
412 if (!IsIAuthed(sptr)) {
414 return iauth_start_client(iauth_active, sptr);
418 switch (conf_check_client(sptr))
422 case ACR_NO_AUTHORIZATION:
423 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
424 get_client_name(sptr, HIDE_IP));
425 ++ServerStats->is_ref;
426 return exit_client(cptr, sptr, &me,
427 "No Authorization - use another server");
428 case ACR_TOO_MANY_IN_CLASS:
429 if (CurrentTime - last_too_many1 >= (time_t) 60)
431 last_too_many1 = CurrentTime;
432 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
433 "class %i for %s.", get_client_class(sptr),
434 get_client_name(sptr, SHOW_IP));
436 ++ServerStats->is_ref;
437 IPcheck_connect_fail(&cli_ip(sptr));
438 return exit_client(cptr, sptr, &me,
439 "Sorry, your connection class is full - try "
440 "again later or try another server");
441 case ACR_TOO_MANY_FROM_IP:
442 if (CurrentTime - last_too_many2 >= (time_t) 60)
444 last_too_many2 = CurrentTime;
445 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
447 get_client_name(sptr, SHOW_IP));
449 ++ServerStats->is_ref;
450 return exit_client(cptr, sptr, &me,
451 "Too many connections from your host");
452 case ACR_ALREADY_AUTHORIZED:
453 /* Can this ever happen? */
455 ++ServerStats->is_ref;
456 IPcheck_connect_fail(&cli_ip(sptr));
457 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
459 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
460 ircd_strncpy(user->realhost, cli_sockhost(sptr), HOSTLEN);
461 aconf = cli_confs(sptr)->value.aconf;
463 clean_user_id(user->username,
464 HasFlag(sptr, FLAG_GOTID) ? cli_username(sptr) : username,
465 HasFlag(sptr, FLAG_DOID) && !HasFlag(sptr, FLAG_GOTID));
467 if ((user->username[0] == '\0')
468 || ((user->username[0] == '~') && (user->username[1] == '\000')))
469 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
471 if (!EmptyString(aconf->passwd)
472 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
473 && strcmp(cli_passwd(sptr), aconf->passwd))
475 ServerStats->is_ref++;
476 send_reply(sptr, ERR_PASSWDMISMATCH);
477 return exit_client(cptr, sptr, &me, "Bad Password");
479 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
481 * following block for the benefit of time-dependent K:-lines
483 killreason = find_kill(sptr);
485 ServerStats->is_ref++;
486 return exit_client(cptr, sptr, &me,
487 (killreason == -1 ? "K-lined" : "G-lined"));
490 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
491 * Summary of rules now implemented in this patch: Ensor 11-94
492 * In a mixed-case name, if first char is upper, one more upper may
493 * appear anywhere. (A mixed-case name *must* have an upper first
494 * char, and may have one other upper.)
495 * A third upper may appear if all 3 appear at the beginning of the
496 * name, separated only by "others" (-/_/.).
497 * A single group of digits is allowed anywhere.
498 * Two groups of digits are allowed if at least one of the groups is
499 * at the beginning or the end.
500 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
501 * But not as the first or last char.
502 * No other special characters are allowed.
503 * Name must contain at least one letter.
505 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
506 while (*tmpstr && !badid)
518 if ((leadcaps || pos == 1) && !lower && !digits)
524 if (pos == 1 || !IsDigit(d))
531 else if (c == '-' || c == '_' || c == '.')
536 else if (d == '-' || d == '_' || d == '.' || other > 2)
545 if (lower && upper && (!leadcaps || leadcaps > 3 ||
546 (upper > 2 && upper > leadcaps)))
548 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
550 else if ((!lower && !upper) || !IsAlnum(c))
553 if (badid && (!HasFlag(sptr, FLAG_GOTID) ||
554 strcmp(cli_username(sptr), username) != 0))
556 ServerStats->is_ref++;
558 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
559 ":Your username is invalid.");
560 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
561 ":Connect with your real username, in lowercase.");
562 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
563 ":If your mail address were foo@bar.com, your username "
565 return exit_client(cptr, sptr, &me, "USER: Bad username");
567 Count_unknownbecomesclient(sptr, UserStats);
570 ircd_strncpy(user->username, username, USERLEN);
571 Count_newremoteclient(UserStats, user->server);
575 if (IsInvisible(sptr))
576 ++UserStats.inv_clients;
580 if (MyConnect(sptr)) {
581 cli_handler(sptr) = CLIENT_HANDLER;
582 release_dns_reply(sptr);
583 SetLocalNumNick(sptr);
586 feature_str(FEAT_NETWORK),
587 feature_str(FEAT_PROVIDER) ? " via " : "",
588 feature_str(FEAT_PROVIDER) ? feature_str(FEAT_PROVIDER) : "",
591 * This is a duplicate of the NOTICE but see below...
593 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
594 send_reply(sptr, RPL_CREATED, creation);
595 send_reply(sptr, RPL_MYINFO, cli_name(&me), infousermodes, infochanmodes,
596 infochanmodeswithparams, version);
597 send_supported(sptr);
598 m_lusers(sptr, sptr, 1, parv);
601 /* nextping = CurrentTime; */
602 if (cli_snomask(sptr) & SNO_NOISY)
603 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
604 if (feature_bool(FEAT_CONNEXIT_NOTICES))
605 sendto_opmask_butone(0, SNO_CONNEXIT,
606 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s%s>",
607 cli_name(sptr), user->username, user->host,
608 cli_sock_ip(sptr), get_client_class(sptr),
609 cli_info(sptr), NumNick(cptr) /* two %s's */);
611 IPcheck_connect_succeeded(sptr);
613 * Set user's initial modes
615 parv[0] = (char*)nick;
616 parv[1] = (char*)nick;
617 parv[2] = (char*)client_get_default_umode(sptr);
618 parv[3] = NULL; /* needed in case of +s */
619 set_user_mode(sptr, sptr, 3, parv);
620 ClearHiddenHost(sptr); /* just in case somebody stuck +x in there */
623 /* if (IsServer(cptr)) */
625 struct Client *acptr;
627 acptr = user->server;
628 if (cli_from(acptr) != cli_from(sptr))
630 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
631 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
632 cli_sockhost(cli_from(acptr)));
633 SetFlag(sptr, FLAG_KILLED);
634 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
636 else if (HasFlag(acptr, FLAG_TS8))
637 SetFlag(sptr, FLAG_TS8);
640 * Check to see if this user is being propogated
641 * as part of a net.burst, or is using protocol 9.
642 * FIXME: This can be speeded up - its stupid to check it for
643 * every NICK message in a burst again --Run.
645 for (acptr = user->server; acptr != &me; acptr = cli_serv(acptr)->up)
647 if (IsBurst(acptr) || Protocol(acptr) < 10)
650 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
653 * We ran out of bits to count this
655 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
656 sptr, cli_name(&me));
657 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
660 tmpstr = umode_str(sptr);
661 /* Send full IP address to IPv6-grokking servers. */
662 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
663 FLAG_IPV6, FLAG_LAST_FLAG,
664 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
665 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
666 user->username, user->realhost,
667 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
668 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 1),
669 NumNick(sptr), cli_info(sptr));
670 /* Send fake IPv6 addresses to pre-IPv6 servers. */
671 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
672 FLAG_LAST_FLAG, FLAG_IPV6,
673 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
674 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
675 user->username, user->realhost,
676 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
677 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 0),
678 NumNick(sptr), cli_info(sptr));
680 /* Send server notice mask to client */
681 if (MyUser(sptr) && (cli_snomask(sptr) != SNO_DEFAULT) && HasFlag(sptr, FLAG_SERVNOTICE))
682 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
687 /** List of user mode characters. */
688 static const struct UserMode {
689 unsigned int flag; /**< User mode constant. */
690 char c; /**< Character corresponding to the mode. */
694 { FLAG_INVISIBLE, 'i' },
695 { FLAG_WALLOP, 'w' },
696 { FLAG_SERVNOTICE, 's' },
698 { FLAG_CHSERV, 'k' },
700 { FLAG_ACCOUNT, 'r' },
701 { FLAG_HIDDENHOST, 'x' }
704 /** Length of #userModeList. */
705 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
708 * XXX - find a way to get rid of this
710 /** Nasty global buffer used for communications with umode_str() and others. */
711 static char umodeBuf[BUFSIZE];
713 /** Try to set a user's nickname.
714 * If \a sptr is a server, the client is being introduced for the first time.
715 * @param[in] cptr Client to set nickname.
716 * @param[in] sptr Client sending the NICK.
717 * @param[in] nick New nickname.
718 * @param[in] parc Number of arguments to NICK.
719 * @param[in] parv Argument list to NICK.
720 * @return CPTR_KILLED if \a cptr was killed, else 0.
722 int set_nick_name(struct Client* cptr, struct Client* sptr,
723 const char* nick, int parc, char* parv[])
725 if (IsServer(sptr)) {
727 const char* account = 0;
731 * A server introducing a new client, change source
733 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
734 assert(0 != new_client);
736 cli_hopcount(new_client) = atoi(parv[2]);
737 cli_lastnick(new_client) = atoi(parv[3]);
738 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+')
740 for (p = parv[6] + 1; *p; p++)
742 for (i = 0; i < USERMODELIST_SIZE; ++i)
744 if (userModeList[i].c == *p)
746 SetFlag(new_client, userModeList[i].flag);
747 if (userModeList[i].flag == FLAG_ACCOUNT)
754 client_set_privs(new_client, NULL); /* set privs on user */
758 strcpy(cli_name(new_client), nick);
759 cli_user(new_client) = make_user(new_client);
760 cli_user(new_client)->server = sptr;
761 SetRemoteNumNick(new_client, parv[parc - 2]);
763 * IP# of remote client
765 base64toip(parv[parc - 3], &cli_ip(new_client));
767 add_client_to_list(new_client);
768 hAddClient(new_client);
770 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
771 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
772 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
773 ircd_strncpy(cli_user(new_client)->realhost, parv[5], HOSTLEN);
774 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
776 int len = ACCOUNTLEN;
777 if ((p = strchr(account, ':'))) {
778 len = (p++) - account;
779 cli_user(new_client)->acc_create = atoi(p);
780 Debug((DEBUG_DEBUG, "Received timestamped account in user mode; "
781 "account \"%s\", timestamp %Tu", account,
782 cli_user(new_client)->acc_create));
784 ircd_strncpy(cli_user(new_client)->account, account, len);
786 if (HasHiddenHost(new_client))
787 ircd_snprintf(0, cli_user(new_client)->host, HOSTLEN, "%s.%s",
788 account, feature_str(FEAT_HIDDEN_HOST));
790 return register_user(cptr, new_client, cli_name(new_client), parv[4]);
792 else if ((cli_name(sptr))[0]) {
794 * Client changing its nick
796 * If the client belongs to me, then check to see
797 * if client is on any channels where it is currently
798 * banned. If so, do not allow the nick change to occur.
801 const char* channel_name;
802 struct Membership *member;
803 if ((channel_name = find_no_nickchange_channel(sptr))) {
804 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
807 * Refuse nick change if the last nick change was less
808 * then 30 seconds ago. This is intended to get rid of
809 * clone bots doing NICK FLOOD. -SeKs
810 * If someone didn't change their nick for more then 60 seconds
811 * however, allow to do two nick changes immediately after another
812 * before limiting the nick flood. -Run
814 if (CurrentTime < cli_nextnick(cptr))
816 cli_nextnick(cptr) += 2;
817 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
818 cli_nextnick(cptr) - CurrentTime);
819 /* Send error message */
820 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
821 /* bounce NICK to user */
822 return 0; /* ignore nick change! */
825 /* Limit total to 1 change per NICK_DELAY seconds: */
826 cli_nextnick(cptr) += NICK_DELAY;
827 /* However allow _maximal_ 1 extra consecutive nick change: */
828 if (cli_nextnick(cptr) < CurrentTime)
829 cli_nextnick(cptr) = CurrentTime;
831 /* Invalidate all bans against the user so we check them again */
832 for (member = (cli_user(cptr))->channel; member;
833 member = member->next_channel)
834 ClearBanValid(member);
837 * Also set 'lastnick' to current time, if changed.
839 if (0 != ircd_strcmp(parv[0], nick))
840 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
843 * Client just changing his/her nick. If he/she is
844 * on a channel, send note of change to all clients
845 * on that channel. Propagate notice to other servers.
848 sendcmdto_common_channels_butone(sptr, CMD_NICK, NULL, ":%s", nick);
849 add_history(sptr, 1);
850 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
854 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
856 if ((cli_name(sptr))[0])
858 strcpy(cli_name(sptr), nick);
862 /* Local client setting NICK the first time */
864 strcpy(cli_name(sptr), nick);
865 if (!cli_user(sptr)) {
866 cli_user(sptr) = make_user(sptr);
867 cli_user(sptr)->server = &me;
871 cli_unreg(sptr) &= ~CLIREG_NICK; /* nickname now set */
874 * If the client hasn't gotten a cookie-ping yet,
875 * choose a cookie and send it. -record!jegelhof@cloud9.net
877 if (!cli_cookie(sptr)) {
879 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
880 } while (!cli_cookie(sptr));
881 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
883 else if (!cli_unreg(sptr)) {
885 * USER and PONG already received, now we have NICK.
886 * register_user may reject the client and call exit_client
887 * for it - must test this and exit m_nick too !
889 cli_lastnick(sptr) = TStime(); /* Always local client */
890 if (register_user(cptr, sptr, nick, cli_user(sptr)->username) == CPTR_KILLED)
897 /** Calculate the hash value for a target.
898 * @param[in] target Pointer to target, cast to unsigned int.
899 * @return Hash value constructed from the pointer.
901 static unsigned char hash_target(unsigned int target)
903 return (unsigned char) (target >> 16) ^ (target >> 8);
906 /** Records \a target as a recent target for \a sptr.
907 * @param[in] sptr User who has sent to a new target.
908 * @param[in] target Target to add.
911 add_target(struct Client *sptr, void *target)
913 /* Ok, this shouldn't work esp on alpha
915 unsigned char hash = hash_target((unsigned long) target);
916 unsigned char* targets;
919 assert(cli_local(sptr));
921 targets = cli_targets(sptr);
926 for (i = 0; i < MAXTARGETS; ++i) {
927 if (targets[i] == hash)
933 memmove(&targets[RESERVEDTARGETS + 1],
934 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
935 targets[RESERVEDTARGETS] = hash;
938 /** Check whether \a sptr can send to or join \a target yet.
939 * @param[in] sptr User trying to join a channel or send a message.
940 * @param[in] target Target of the join or message.
941 * @param[in] name Name of the target.
942 * @param[in] created If non-zero, trying to join a new channel.
943 * @return Non-zero if too many target changes; zero if okay to send.
945 int check_target_limit(struct Client *sptr, void *target, const char *name,
948 unsigned char hash = hash_target((unsigned long) target);
950 unsigned char* targets;
953 assert(cli_local(sptr));
954 targets = cli_targets(sptr);
956 /* If user is invited to channel, give him/her a free target */
957 if (IsChannelName(name) && IsInvited(sptr, target))
961 * Same target as last time?
963 if (targets[0] == hash)
965 for (i = 1; i < MAXTARGETS; ++i) {
966 if (targets[i] == hash) {
967 memmove(&targets[1], &targets[0], i);
976 if (CurrentTime < cli_nexttarget(sptr)) {
977 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
981 cli_nexttarget(sptr) += 2;
982 send_reply(sptr, ERR_TARGETTOOFAST, name,
983 cli_nexttarget(sptr) - CurrentTime);
988 cli_nexttarget(sptr) += TARGET_DELAY;
989 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
990 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
993 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
998 /** Allows a channel operator to avoid target change checks when
999 * sending messages to users on their channel.
1000 * @param[in] source User sending the message.
1001 * @param[in] nick Destination of the message.
1002 * @param[in] channel Name of channel being sent to.
1003 * @param[in] text Message to send.
1004 * @param[in] is_notice If non-zero, use CNOTICE instead of CPRIVMSG.
1006 /* Added 971023 by Run. */
1007 int whisper(struct Client* source, const char* nick, const char* channel,
1008 const char* text, int is_notice)
1010 struct Client* dest;
1011 struct Channel* chptr;
1012 struct Membership* membership;
1014 assert(0 != source);
1016 assert(0 != channel);
1017 assert(MyUser(source));
1019 if (!(dest = FindUser(nick))) {
1020 return send_reply(source, ERR_NOSUCHNICK, nick);
1022 if (!(chptr = FindChannel(channel))) {
1023 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
1026 * compare both users channel lists, instead of the channels user list
1027 * since the link is the same, this should be a little faster for channels
1028 * with a lot of users
1030 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
1031 if (chptr == membership->channel)
1034 if (0 == membership) {
1035 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
1037 if (!IsVoicedOrOpped(membership)) {
1038 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
1041 * lookup channel in destination
1043 assert(0 != cli_user(dest));
1044 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
1045 if (chptr == membership->channel)
1048 if (0 == membership || IsZombie(membership)) {
1049 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
1051 if (is_silenced(source, dest))
1054 if (cli_user(dest)->away)
1055 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
1057 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
1059 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
1064 /** Send a user mode change for \a cptr to neighboring servers.
1065 * @param[in] cptr User whose mode is changing.
1066 * @param[in] sptr Client who sent us the mode change message.
1067 * @param[in] old Prior set of user flags.
1068 * @param[in] prop If non-zero, also include FLAG_OPER.
1070 void send_umode_out(struct Client *cptr, struct Client *sptr,
1071 struct Flags *old, int prop)
1074 struct Client *acptr;
1076 send_umode(NULL, sptr, old, prop ? SEND_UMODES : SEND_UMODES_BUT_OPER);
1078 for (i = HighestFd; i >= 0; i--)
1080 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
1081 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
1082 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
1084 if (cptr && MyUser(cptr))
1085 send_umode(cptr, sptr, old, ALL_UMODES);
1089 /** Call \a fmt for each Client named in \a names.
1090 * @param[in] sptr Client requesting information.
1091 * @param[in] names Space-delimited list of nicknames.
1092 * @param[in] rpl Base reply string for messages.
1093 * @param[in] fmt Formatting callback function.
1095 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1100 int users_found = 0;
1101 struct Client* acptr;
1108 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1110 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1111 if ((acptr = FindUser(name))) {
1113 msgq_append(0, mb, " ");
1114 (*fmt)(acptr, sptr, mb);
1116 if (5 == ++arg_count)
1119 send_buffer(sptr, mb, 0);
1123 /** Set \a flag on \a cptr and possibly hide the client's hostmask.
1124 * @param[in,out] cptr User who is getting a new flag.
1125 * @param[in] flag Some flag that affects host-hiding (FLAG_HIDDENHOST, FLAG_ACCOUNT).
1129 hide_hostmask(struct Client *cptr, unsigned int flag)
1131 struct Membership *chan;
1134 case FLAG_HIDDENHOST:
1135 /* Local users cannot set +x unless FEAT_HOST_HIDING is true. */
1136 if (MyConnect(cptr) && !feature_bool(FEAT_HOST_HIDING))
1140 /* Invalidate all bans against the user so we check them again */
1141 for (chan = (cli_user(cptr))->channel; chan;
1142 chan = chan->next_channel)
1143 ClearBanValid(chan);
1149 SetFlag(cptr, flag);
1150 if (!HasFlag(cptr, FLAG_HIDDENHOST) || !HasFlag(cptr, FLAG_ACCOUNT))
1153 sendcmdto_common_channels_butone(cptr, CMD_QUIT, cptr, ":Registered");
1154 ircd_snprintf(0, cli_user(cptr)->host, HOSTLEN, "%s.%s",
1155 cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
1157 /* ok, the client is now fully hidden, so let them know -- hikari */
1158 if (MyConnect(cptr))
1159 send_reply(cptr, RPL_HOSTHIDDEN, cli_user(cptr)->host);
1162 * Go through all channels the client was on, rejoin him
1163 * and set the modes, if any
1165 for (chan = cli_user(cptr)->channel; chan; chan = chan->next_channel)
1169 /* Send a JOIN unless the user's join has been delayed. */
1170 if (!IsDelayedJoin(chan))
1171 sendcmdto_channel_butserv_butone(cptr, CMD_JOIN, chan->channel, cptr, 0,
1172 "%H", chan->channel);
1173 if (IsChanOp(chan) && HasVoice(chan))
1174 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr, 0,
1175 "%H +ov %C %C", chan->channel, cptr,
1177 else if (IsChanOp(chan) || HasVoice(chan))
1178 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr, 0,
1179 "%H +%c %C", chan->channel, IsChanOp(chan) ? 'o' : 'v', cptr);
1184 /** Set a user's mode. This function checks that \a cptr is trying to
1185 * set his own mode, prevents local users from setting inappropriate
1186 * modes through this function, and applies any other side effects of
1187 * a successful mode change.
1189 * @param[in,out] cptr User setting someone's mode.
1190 * @param[in] sptr Client who sent the mode change message.
1191 * @param[in] parc Number of parameters in \a parv.
1192 * @param[in] parv Parameters to MODE.
1195 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1199 struct Client *acptr;
1202 struct Flags setflags;
1203 unsigned int tmpmask = 0;
1204 int snomask_given = 0;
1207 int do_host_hiding = 0;
1212 return need_more_params(sptr, "MODE");
1214 if (!(acptr = FindUser(parv[1])))
1216 if (MyConnect(sptr))
1217 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1221 if (IsServer(sptr) || sptr != acptr)
1224 sendwallto_group_butone(&me, WALL_WALLOPS, 0,
1225 "MODE for User %s from %s!%s", parv[1],
1226 cli_name(cptr), cli_name(sptr));
1228 send_reply(sptr, ERR_USERSDONTMATCH);
1236 for (i = 0; i < USERMODELIST_SIZE; i++)
1238 if (HasFlag(sptr, userModeList[i].flag) &&
1239 userModeList[i].flag != FLAG_ACCOUNT)
1240 *m++ = userModeList[i].c;
1243 send_reply(sptr, RPL_UMODEIS, buf);
1244 if (HasFlag(sptr, FLAG_SERVNOTICE) && MyConnect(sptr)
1245 && cli_snomask(sptr) !=
1246 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1247 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1252 * find flags already set for user
1253 * why not just copy them?
1255 setflags = cli_flags(sptr);
1257 if (MyConnect(sptr))
1258 tmpmask = cli_snomask(sptr);
1261 * parse mode change string(s)
1263 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1264 for (m = *p; *m; m++) {
1273 if (*(p + 1) && is_snomask(*(p + 1))) {
1275 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1276 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1279 tmpmask = (what == MODE_ADD) ?
1280 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1282 SetServNotice(sptr);
1284 ClearServNotice(sptr);
1287 if (what == MODE_ADD)
1293 if (what == MODE_ADD)
1296 ClrFlag(sptr, FLAG_OPER);
1297 ClrFlag(sptr, FLAG_LOCOP);
1298 if (MyConnect(sptr))
1300 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1301 cli_handler(sptr) = CLIENT_HANDLER;
1306 if (what == MODE_ADD)
1310 ClrFlag(sptr, FLAG_OPER);
1311 ClrFlag(sptr, FLAG_LOCOP);
1312 if (MyConnect(sptr))
1314 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1315 cli_handler(sptr) = CLIENT_HANDLER;
1320 if (what == MODE_ADD)
1323 ClearInvisible(sptr);
1326 if (what == MODE_ADD)
1332 if (what == MODE_ADD)
1333 SetChannelService(sptr);
1335 ClearChannelService(sptr);
1338 if (what == MODE_ADD)
1344 if (what == MODE_ADD)
1348 send_reply(sptr, ERR_UMODEUNKNOWNFLAG, *m);
1354 * Evaluate rules for new user mode
1355 * Stop users making themselves operators too easily:
1357 if (!IsServer(cptr))
1359 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1361 if (!FlagHas(&setflags, FLAG_LOCOP) && IsLocOp(sptr))
1364 * new umode; servers can set it, local users cannot;
1365 * prevents users from /kick'ing or /mode -o'ing
1367 if (!FlagHas(&setflags, FLAG_CHSERV))
1368 ClearChannelService(sptr);
1370 * only send wallops to opers
1372 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1373 !FlagHas(&setflags, FLAG_WALLOP))
1375 if (feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY) && MyConnect(sptr) &&
1376 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_SERVNOTICE))
1378 ClearServNotice(sptr);
1379 set_snomask(sptr, 0, SNO_SET);
1381 if (feature_bool(FEAT_HIS_DEBUG_OPER_ONLY) &&
1382 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_DEBUG))
1385 if (MyConnect(sptr))
1387 if ((FlagHas(&setflags, FLAG_OPER) || FlagHas(&setflags, FLAG_LOCOP)) &&
1389 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPERATOR);
1391 if (SendServNotice(sptr))
1393 if (tmpmask != cli_snomask(sptr))
1394 set_snomask(sptr, tmpmask, SNO_SET);
1395 if (cli_snomask(sptr) && snomask_given)
1396 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1399 set_snomask(sptr, 0, SNO_SET);
1402 * Compare new flags with old flags and send string which
1403 * will cause servers to update correctly.
1405 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1409 client_set_privs(sptr, NULL); /* may set propagate privilege */
1411 /* remember propagate privilege setting */
1412 if (HasPriv(sptr, PRIV_PROPAGATE))
1414 if (FlagHas(&setflags, FLAG_OPER) && !IsOper(sptr))
1416 /* user no longer oper */
1418 client_set_privs(sptr, NULL); /* will clear propagate privilege */
1420 if (FlagHas(&setflags, FLAG_INVISIBLE) && !IsInvisible(sptr))
1421 --UserStats.inv_clients;
1422 if (!FlagHas(&setflags, FLAG_INVISIBLE) && IsInvisible(sptr))
1423 ++UserStats.inv_clients;
1424 if (!FlagHas(&setflags, FLAG_HIDDENHOST) && do_host_hiding)
1425 hide_hostmask(sptr, FLAG_HIDDENHOST);
1426 send_umode_out(cptr, sptr, &setflags, prop);
1431 /** Build a mode string to describe modes for \a cptr.
1432 * @param[in] cptr Some user.
1433 * @return Pointer to a static buffer.
1435 char *umode_str(struct Client *cptr)
1437 /* Maximum string size: "owidgrx\0" */
1440 struct Flags c_flags = cli_flags(cptr);
1442 if (HasPriv(cptr, PRIV_PROPAGATE))
1443 FlagSet(&c_flags, FLAG_OPER);
1445 FlagClr(&c_flags, FLAG_OPER);
1447 for (i = 0; i < USERMODELIST_SIZE; ++i)
1449 if (FlagHas(&c_flags, userModeList[i].flag) &&
1450 userModeList[i].flag >= FLAG_GLOBAL_UMODES)
1451 *m++ = userModeList[i].c;
1454 if (IsAccount(cptr))
1456 char* t = cli_user(cptr)->account;
1459 while ((*m++ = *t++))
1462 if (cli_user(cptr)->acc_create) {
1464 Debug((DEBUG_DEBUG, "Sending timestamped account in user mode for "
1465 "account \"%s\"; timestamp %Tu", cli_user(cptr)->account,
1466 cli_user(cptr)->acc_create));
1467 ircd_snprintf(0, t = nbuf, sizeof(nbuf), ":%Tu",
1468 cli_user(cptr)->acc_create);
1469 m--; /* back up over previous nul-termination */
1470 while ((*m++ = *t++))
1477 return umodeBuf; /* Note: static buffer, gets
1478 overwritten by send_umode() */
1481 /** Send a mode change string for \a sptr to \a cptr.
1482 * @param[in] cptr Destination of mode change message.
1483 * @param[in] sptr User whose mode has changed.
1484 * @param[in] old Pre-change set of modes for \a sptr.
1485 * @param[in] sendset One of ALL_UMODES, SEND_UMODES_BUT_OPER,
1486 * SEND_UMODES, to select which changed user modes to send.
1488 void send_umode(struct Client *cptr, struct Client *sptr, struct Flags *old,
1494 int what = MODE_NULL;
1497 * Build a string in umodeBuf to represent the change in the user's
1498 * mode between the new (cli_flags(sptr)) and 'old', but skipping
1499 * the modes indicated by sendset.
1503 for (i = 0; i < USERMODELIST_SIZE; ++i)
1505 flag = userModeList[i].flag;
1506 if (FlagHas(old, flag)
1507 == HasFlag(sptr, flag))
1513 case SEND_UMODES_BUT_OPER:
1514 if (flag == FLAG_OPER)
1516 /* and fall through */
1518 if (flag < FLAG_GLOBAL_UMODES)
1522 if (FlagHas(old, flag))
1524 if (what == MODE_DEL)
1525 *m++ = userModeList[i].c;
1530 *m++ = userModeList[i].c;
1533 else /* !FlagHas(old, flag) */
1535 if (what == MODE_ADD)
1536 *m++ = userModeList[i].c;
1541 *m++ = userModeList[i].c;
1546 if (*umodeBuf && cptr)
1547 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1551 * Check to see if this resembles a sno_mask. It is if 1) there is
1552 * at least one digit and 2) The first digit occurs before the first
1553 * alphabetic character.
1554 * @param[in] word Word to check for sno_mask-ness.
1555 * @return Non-zero if \a word looks like a server notice mask; zero if not.
1557 int is_snomask(char *word)
1561 for (; *word; word++)
1564 else if (IsAlpha(*word))
1570 /** Update snomask \a oldmask according to \a arg and \a what.
1571 * @param[in] oldmask Original user mask.
1572 * @param[in] arg Update string (either a number or '+'/'-' followed by a number).
1573 * @param[in] what MODE_ADD if adding the mask.
1574 * @return New value of service notice mask.
1576 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1578 unsigned int sno_what;
1579 unsigned int newmask;
1583 if (what == MODE_ADD)
1588 else if (*arg == '-')
1591 if (what == MODE_ADD)
1597 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1598 /* pity we don't have strtoul everywhere */
1599 newmask = (unsigned int)atoi(arg);
1600 if (sno_what == SNO_DEL)
1601 newmask = oldmask & ~newmask;
1602 else if (sno_what == SNO_ADD)
1607 /** Remove \a cptr from the singly linked list \a list.
1608 * @param[in] cptr Client to remove from list.
1609 * @param[in,out] list Pointer to head of list containing \a cptr.
1611 static void delfrom_list(struct Client *cptr, struct SLink **list)
1614 struct SLink* prv = NULL;
1616 for (tmp = *list; tmp; tmp = tmp->next) {
1617 if (tmp->value.cptr == cptr) {
1619 prv->next = tmp->next;
1629 /** Set \a cptr's server notice mask, according to \a what.
1630 * @param[in,out] cptr Client whose snomask is updating.
1631 * @param[in] newmask Base value for new snomask.
1632 * @param[in] what One of SNO_ADD, SNO_DEL, SNO_SET, to choose operation.
1634 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1636 unsigned int oldmask, diffmask; /* unsigned please */
1640 oldmask = cli_snomask(cptr);
1642 if (what == SNO_ADD)
1644 else if (what == SNO_DEL)
1645 newmask = oldmask & ~newmask;
1646 else if (what != SNO_SET) /* absolute set, no math needed */
1647 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1649 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1651 diffmask = oldmask ^ newmask;
1653 for (i = 0; diffmask >> i; i++) {
1654 if (((diffmask >> i) & 1))
1656 if (((newmask >> i) & 1))
1659 tmp->next = opsarray[i];
1660 tmp->value.cptr = cptr;
1664 /* not real portable :( */
1665 delfrom_list(cptr, &opsarray[i]);
1668 cli_snomask(cptr) = newmask;
1671 /** Check whether \a sptr is allowed to send a message to \a acptr.
1672 * If \a sptr is a remote user, it means some server has an outdated
1673 * SILENCE list for \a acptr, so send the missing SILENCE mask(s) back
1674 * in the direction of \a sptr.
1675 * @param[in] sptr Client trying to send a message.
1676 * @param[in] acptr Destination of message.
1677 * @return Non-zero if \a sptr is SILENCEd by \a acptr, zero if not.
1679 int is_silenced(struct Client *sptr, struct Client *acptr)
1683 size_t buf_used, slen;
1686 if (!(user = cli_user(acptr))
1687 || !(found = find_ban(sptr, user->silence)))
1689 assert(!(found->flags & BAN_EXCEPTION));
1690 if (!MyConnect(sptr)) {
1691 /* Buffer positive silence to send back. */
1692 buf_used = strlen(found->banstr);
1693 memcpy(buf, found->banstr, buf_used);
1694 /* Add exceptions to buffer. */
1695 for (found = user->silence; found; found = found->next) {
1696 if (!(found->flags & BAN_EXCEPTION))
1698 slen = strlen(found->banstr);
1699 if (buf_used + slen + 4 > 400) {
1700 buf[buf_used] = '\0';
1701 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1705 buf[buf_used++] = ',';
1706 buf[buf_used++] = '+';
1707 buf[buf_used++] = '~';
1708 memcpy(buf + buf_used, found->banstr, slen);
1711 /* Flush silence buffer. */
1713 buf[buf_used] = '\0';
1714 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1721 /** Send RPL_ISUPPORT lines to \a cptr.
1722 * @param[in] cptr Client to send ISUPPORT to.
1726 send_supported(struct Client *cptr)
1728 char featurebuf[512];
1730 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1731 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1732 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1733 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1735 return 0; /* convenience return, if it's ever needed */