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));
95 cli_user(cptr)->refcnt = 1;
97 return cli_user(cptr);
100 /** Dereference \a user.
101 * User structures are reference-counted; if the refcount of \a user
102 * becomes zero, free it.
103 * @param[in] user User to dereference.
105 void free_user(struct User* user)
108 assert(0 < user->refcnt);
110 if (--user->refcnt == 0) {
116 assert(0 == user->joined);
117 assert(0 == user->invited);
118 assert(0 == user->channel);
125 /** Find number of User structs allocated and memory used by them.
126 * @param[out] count_out Receives number of User structs allocated.
127 * @param[out] bytes_out Receives number of bytes used by User structs.
129 void user_count_memory(size_t* count_out, size_t* bytes_out)
131 assert(0 != count_out);
132 assert(0 != bytes_out);
133 *count_out = userCount;
134 *bytes_out = userCount * sizeof(struct User);
138 /** Find the next client (starting at \a next) with a name that matches \a ch.
139 * Normal usage loop is:
140 * for (x = client; x = next_client(x,mask); x = x->next)
141 * HandleMatchingClient;
143 * @param[in] next First client to check.
144 * @param[in] ch Name mask to check against.
145 * @return Next matching client found, or NULL if none.
147 struct Client *next_client(struct Client *next, const char* ch)
149 struct Client *tmp = next;
154 next = FindClient(ch);
155 next = next ? next : tmp;
156 if (cli_prev(tmp) == next)
160 for (; next; next = cli_next(next))
161 if (!match(ch, cli_name(next)))
166 /** Find the destination server for a command, and forward it if that is not us.
168 * \a server may be a nickname, server name, server mask (if \a from
169 * is a local user) or server numnick (if \a is a server or remote
172 * @param[in] from Client that sent the command to us.
173 * @param[in] cmd Long-form command text.
174 * @param[in] tok Token-form command text.
175 * @param[in] one Client that originated the command (ignored).
176 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
177 * @param[in] pattern Format string of arguments to command.
178 * @param[in] server Index of target name or mask in \a parv.
179 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
180 * @param[in] parv Array of arguments to command.
181 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
183 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
184 struct Client *one, int MustBeOper, const char *pattern,
185 int server, int parc, char *parv[])
187 struct Client *acptr;
190 /* Assume it's me, if no server or an unregistered client */
191 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
192 return (HUNTED_ISME);
194 if (MustBeOper && !IsPrivileged(from))
196 send_reply(from, ERR_NOPRIVILEGES);
197 return HUNTED_NOSUCH;
200 /* Make sure it's a server */
202 /* Make sure it's a server */
203 if (!strchr(to, '*')) {
204 if (0 == (acptr = FindClient(to))) {
205 send_reply(from, ERR_NOSUCHSERVER, to);
206 return HUNTED_NOSUCH;
210 acptr = cli_user(acptr)->server;
211 } else if (!(acptr = find_match_server(to))) {
212 send_reply(from, ERR_NOSUCHSERVER, to);
213 return (HUNTED_NOSUCH);
215 } else if (!(acptr = FindNServer(to))) {
216 send_reply(from, SND_EXPLICIT | ERR_NOSUCHSERVER, "* :Server has disconnected");
217 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
221 return (HUNTED_ISME);
223 if (MustBeOper && !IsPrivileged(from)) {
224 send_reply(from, ERR_NOPRIVILEGES);
225 return HUNTED_NOSUCH;
228 /* assert(!IsServer(from)); */
230 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
232 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
233 parv[4], parv[5], parv[6], parv[7], parv[8]);
235 return (HUNTED_PASS);
238 /** Find the destination server for a command, and forward it (as a
239 * high-priority command) if that is not us.
241 * \a server may be a nickname, server name, server mask (if \a from
242 * is a local user) or server numnick (if \a is a server or remote
244 * Unlike hunt_server_cmd(), this appends the message to the
245 * high-priority message queue for the destination server.
247 * @param[in] from Client that sent the command to us.
248 * @param[in] cmd Long-form command text.
249 * @param[in] tok Token-form command text.
250 * @param[in] one Client that originated the command (ignored).
251 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
252 * @param[in] pattern Format string of arguments to command.
253 * @param[in] server Index of target name or mask in \a parv.
254 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
255 * @param[in] parv Array of arguments to command.
256 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
258 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
259 struct Client *one, int MustBeOper,
260 const char *pattern, int server, int parc,
263 struct Client *acptr;
266 /* Assume it's me, if no server or an unregistered client */
267 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
268 return (HUNTED_ISME);
270 /* Make sure it's a server */
272 /* Make sure it's a server */
273 if (!strchr(to, '*')) {
274 if (0 == (acptr = FindClient(to))) {
275 send_reply(from, ERR_NOSUCHSERVER, to);
276 return HUNTED_NOSUCH;
280 acptr = cli_user(acptr)->server;
281 } else if (!(acptr = find_match_server(to))) {
282 send_reply(from, ERR_NOSUCHSERVER, to);
283 return (HUNTED_NOSUCH);
285 } else if (!(acptr = FindNServer(to)))
286 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
289 return (HUNTED_ISME);
291 if (MustBeOper && !IsPrivileged(from)) {
292 send_reply(from, ERR_NOPRIVILEGES);
293 return HUNTED_NOSUCH;
296 /* assert(!IsServer(from)); SETTIME to particular destinations permitted */
298 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
300 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
301 parv[4], parv[5], parv[6], parv[7], parv[8]);
303 return (HUNTED_PASS);
307 /** Copy a cleaned-up version of a username.
308 * Replace all instances of '~' and "invalid" username characters
309 * (!isIrcUi()) with underscores, truncating at USERLEN or the first
310 * control character. \a dest and \a source may be the same buffer.
311 * @param[out] dest Destination buffer.
312 * @param[in] source Source buffer.
313 * @param[in] tilde If non-zero, prepend a '~' to \a dest.
315 static char *clean_user_id(char *dest, char *source, int tilde)
322 ch = *s++; /* Store first character to copy: */
325 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
328 while (ch && !IsCntrl(ch) && rlen--)
330 char nch = *s++; /* Store next character to copy */
331 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
344 * This function is called when both NICK and USER messages
345 * have been accepted for the client, in whatever order. Only
346 * after this the USER message is propagated.
348 * NICK's must be propagated at once when received, although
349 * it would be better to delay them too until full info is
350 * available. Doing it is not so simple though, would have
351 * to implement the following:
353 * 1) user telnets in and gives only "NICK foobar" and waits
354 * 2) another user far away logs in normally with the nick
355 * "foobar" (quite legal, as this server didn't propagate it).
356 * 3) now this server gets nick "foobar" from outside, but
357 * has already the same defined locally. Current server
358 * would just issue "KILL foobar" to clean out dups. But,
359 * this is not fair. It should actually request another
360 * nick from local user or kill him/her...
362 /** Finish registering a user who has sent both NICK and USER.
363 * For local connections, possibly check IAuth; make sure there is a
364 * matching Client config block; clean the username field; check
365 * K/k-lines; check for "hacked" looking usernames; assign a numnick;
366 * and send greeting (WELCOME, ISUPPORT, MOTD, etc).
367 * For all connections, update the invisible user and operator counts;
368 * run IPcheck against their address; and forward the NICK.
370 * @param[in] cptr Client who introduced the user.
371 * @param[in,out] sptr Client who has been fully introduced.
372 * @param[in] nick Client's new nickname.
373 * @param[in] username Client's username.
374 * @return Zero or CPTR_KILLED.
376 int register_user(struct Client *cptr, struct Client *sptr,
377 const char *nick, char *username)
379 struct ConfItem* aconf;
383 char c = 0; /* not alphanum */
384 char d = 'a'; /* not a digit */
392 short digitgroups = 0;
393 struct User* user = cli_user(sptr);
397 user->last = CurrentTime;
398 parv[0] = cli_name(sptr);
399 parv[1] = parv[2] = NULL;
403 static time_t last_too_many1;
404 static time_t last_too_many2;
406 assert(cptr == sptr);
407 assert(cli_unreg(sptr) == 0);
408 if (!IsIAuthed(sptr)) {
410 return iauth_start_client(iauth_active, sptr);
414 switch (conf_check_client(sptr))
418 case ACR_NO_AUTHORIZATION:
419 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
420 get_client_name(sptr, HIDE_IP));
421 ++ServerStats->is_ref;
422 return exit_client(cptr, sptr, &me,
423 "No Authorization - use another server");
424 case ACR_TOO_MANY_IN_CLASS:
425 if (CurrentTime - last_too_many1 >= (time_t) 60)
427 last_too_many1 = CurrentTime;
428 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
429 "class %s for %s.", get_client_class(sptr),
430 get_client_name(sptr, SHOW_IP));
432 ++ServerStats->is_ref;
433 IPcheck_connect_fail(sptr);
434 return exit_client(cptr, sptr, &me,
435 "Sorry, your connection class is full - try "
436 "again later or try another server");
437 case ACR_TOO_MANY_FROM_IP:
438 if (CurrentTime - last_too_many2 >= (time_t) 60)
440 last_too_many2 = CurrentTime;
441 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
443 get_client_name(sptr, SHOW_IP));
445 ++ServerStats->is_ref;
446 return exit_client(cptr, sptr, &me,
447 "Too many connections from your host");
448 case ACR_ALREADY_AUTHORIZED:
449 /* Can this ever happen? */
451 ++ServerStats->is_ref;
452 IPcheck_connect_fail(sptr);
453 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
455 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
456 ircd_strncpy(user->realhost, cli_sockhost(sptr), HOSTLEN);
457 aconf = cli_confs(sptr)->value.aconf;
459 clean_user_id(user->username,
460 HasFlag(sptr, FLAG_GOTID) ? cli_username(sptr) : username,
461 HasFlag(sptr, FLAG_DOID) && !HasFlag(sptr, FLAG_GOTID));
463 if ((user->username[0] == '\0')
464 || ((user->username[0] == '~') && (user->username[1] == '\000')))
465 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
467 if (!EmptyString(aconf->passwd)
468 && strcmp(cli_passwd(sptr), aconf->passwd))
470 ServerStats->is_ref++;
471 send_reply(sptr, ERR_PASSWDMISMATCH);
472 return exit_client(cptr, sptr, &me, "Bad Password");
474 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
476 * following block for the benefit of time-dependent K:-lines
478 killreason = find_kill(sptr);
480 ServerStats->is_ref++;
481 return exit_client(cptr, sptr, &me,
482 (killreason == -1 ? "K-lined" : "G-lined"));
485 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
486 * Summary of rules now implemented in this patch: Ensor 11-94
487 * In a mixed-case name, if first char is upper, one more upper may
488 * appear anywhere. (A mixed-case name *must* have an upper first
489 * char, and may have one other upper.)
490 * A third upper may appear if all 3 appear at the beginning of the
491 * name, separated only by "others" (-/_/.).
492 * A single group of digits is allowed anywhere.
493 * Two groups of digits are allowed if at least one of the groups is
494 * at the beginning or the end.
495 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
496 * But not as the first or last char.
497 * No other special characters are allowed.
498 * Name must contain at least one letter.
500 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
501 while (*tmpstr && !badid)
513 if ((leadcaps || pos == 1) && !lower && !digits)
519 if (pos == 1 || !IsDigit(d))
526 else if (c == '-' || c == '_' || c == '.')
531 else if (d == '-' || d == '_' || d == '.' || other > 2)
540 if (lower && upper && (!leadcaps || leadcaps > 3 ||
541 (upper > 2 && upper > leadcaps)))
543 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
545 else if ((!lower && !upper) || !IsAlnum(c))
548 if (badid && (!HasFlag(sptr, FLAG_GOTID) ||
549 strcmp(cli_username(sptr), username) != 0))
551 ServerStats->is_ref++;
553 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
554 ":Your username is invalid.");
555 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
556 ":Connect with your real username, in lowercase.");
557 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
558 ":If your mail address were foo@bar.com, your username "
560 return exit_client(cptr, sptr, &me, "USER: Bad username");
562 Count_unknownbecomesclient(sptr, UserStats);
565 cli_handler(sptr) = CLIENT_HANDLER;
566 release_dns_reply(sptr);
567 SetLocalNumNick(sptr);
570 feature_str(FEAT_NETWORK),
571 feature_str(FEAT_PROVIDER) ? " via " : "",
572 feature_str(FEAT_PROVIDER) ? feature_str(FEAT_PROVIDER) : "",
575 * This is a duplicate of the NOTICE but see below...
577 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
578 send_reply(sptr, RPL_CREATED, creation);
579 send_reply(sptr, RPL_MYINFO, cli_name(&me), version, infousermodes,
580 infochanmodes, infochanmodeswithparams);
581 send_supported(sptr);
582 m_lusers(sptr, sptr, 1, parv);
585 if (cli_snomask(sptr) & SNO_NOISY)
586 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
587 if (feature_bool(FEAT_CONNEXIT_NOTICES))
588 sendto_opmask_butone(0, SNO_CONNEXIT,
589 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s%s>",
590 cli_name(sptr), user->username, user->host,
591 cli_sock_ip(sptr), get_client_class(sptr),
592 cli_info(sptr), NumNick(cptr) /* two %s's */);
594 IPcheck_connect_succeeded(sptr);
596 * Set user's initial modes
598 tmpstr = (char*)client_get_default_umode(sptr);
599 if (tmpstr) for (; *tmpstr; ++tmpstr) {
602 if (!feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY)) {
604 set_snomask(sptr, SNO_DEFAULT, SNO_SET);
608 if (!feature_bool(FEAT_WALLOPS_OPER_ONLY))
618 if (!feature_bool(FEAT_HIS_DEBUG_OPER_ONLY))
625 struct Client *acptr;
627 ircd_strncpy(user->username, username, USERLEN);
628 Count_newremoteclient(UserStats, user->server);
630 acptr = user->server;
631 if (cli_from(acptr) != cli_from(sptr))
633 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
634 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
635 cli_sockhost(cli_from(acptr)));
636 SetFlag(sptr, FLAG_KILLED);
637 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
639 else if (HasFlag(acptr, FLAG_TS8))
640 SetFlag(sptr, FLAG_TS8);
643 * Check to see if this user is being propagated
644 * as part of a net.burst, or is using protocol 9.
645 * FIXME: This can be sped up - its stupid to check it for
646 * every NICK message in a burst again --Run.
648 for (; acptr != &me; acptr = cli_serv(acptr)->up)
650 if (IsBurst(acptr) || Protocol(acptr) < 10)
653 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
656 * We ran out of bits to count this
658 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
659 sptr, cli_name(&me));
660 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
665 if (IsInvisible(sptr))
666 ++UserStats.inv_clients;
670 tmpstr = umode_str(sptr);
671 /* Send full IP address to IPv6-grokking servers. */
672 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
673 FLAG_IPV6, FLAG_LAST_FLAG,
674 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
675 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
676 user->username, user->realhost,
677 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
678 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 1),
679 NumNick(sptr), cli_info(sptr));
680 /* Send fake IPv6 addresses to pre-IPv6 servers. */
681 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
682 FLAG_LAST_FLAG, FLAG_IPV6,
683 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
684 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
685 user->username, user->realhost,
686 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
687 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 0),
688 NumNick(sptr), cli_info(sptr));
690 /* Send user mode to client */
693 static struct Flags flags; /* automatically initialized to zeros */
694 send_umode(cptr, sptr, &flags, ALL_UMODES);
695 if ((cli_snomask(sptr) != SNO_DEFAULT) && HasFlag(sptr, FLAG_SERVNOTICE))
696 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
701 /** List of user mode characters. */
702 static const struct UserMode {
703 unsigned int flag; /**< User mode constant. */
704 char c; /**< Character corresponding to the mode. */
708 { FLAG_INVISIBLE, 'i' },
709 { FLAG_WALLOP, 'w' },
710 { FLAG_SERVNOTICE, 's' },
712 { FLAG_CHSERV, 'k' },
714 { FLAG_ACCOUNT, 'r' },
715 { FLAG_HIDDENHOST, 'x' }
718 /** Length of #userModeList. */
719 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
722 * XXX - find a way to get rid of this
724 /** Nasty global buffer used for communications with umode_str() and others. */
725 static char umodeBuf[BUFSIZE];
727 /** Try to set a user's nickname.
728 * If \a sptr is a server, the client is being introduced for the first time.
729 * @param[in] cptr Client to set nickname.
730 * @param[in] sptr Client sending the NICK.
731 * @param[in] nick New nickname.
732 * @param[in] parc Number of arguments to NICK.
733 * @param[in] parv Argument list to NICK.
734 * @return CPTR_KILLED if \a cptr was killed, else 0.
736 int set_nick_name(struct Client* cptr, struct Client* sptr,
737 const char* nick, int parc, char* parv[])
739 if (IsServer(sptr)) {
741 const char* account = 0;
745 * A server introducing a new client, change source
747 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
748 assert(0 != new_client);
750 cli_hopcount(new_client) = atoi(parv[2]);
751 cli_lastnick(new_client) = atoi(parv[3]);
752 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+')
754 for (p = parv[6] + 1; *p; p++)
756 for (i = 0; i < USERMODELIST_SIZE; ++i)
758 if (userModeList[i].c == *p)
760 SetFlag(new_client, userModeList[i].flag);
761 if (userModeList[i].flag == FLAG_ACCOUNT)
768 client_set_privs(new_client, NULL); /* set privs on user */
772 strcpy(cli_name(new_client), nick);
773 cli_user(new_client) = make_user(new_client);
774 cli_user(new_client)->server = sptr;
775 SetRemoteNumNick(new_client, parv[parc - 2]);
777 * IP# of remote client
779 base64toip(parv[parc - 3], &cli_ip(new_client));
781 add_client_to_list(new_client);
782 hAddClient(new_client);
784 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
785 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
786 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
787 ircd_strncpy(cli_user(new_client)->realhost, parv[5], HOSTLEN);
788 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
790 int len = ACCOUNTLEN;
791 if ((p = strchr(account, ':'))) {
792 len = (p++) - account;
793 cli_user(new_client)->acc_create = atoi(p);
794 Debug((DEBUG_DEBUG, "Received timestamped account in user mode; "
795 "account \"%s\", timestamp %Tu", account,
796 cli_user(new_client)->acc_create));
798 ircd_strncpy(cli_user(new_client)->account, account, len);
800 if (HasHiddenHost(new_client))
801 ircd_snprintf(0, cli_user(new_client)->host, HOSTLEN, "%s.%s",
802 account, feature_str(FEAT_HIDDEN_HOST));
804 return register_user(cptr, new_client, cli_name(new_client), parv[4]);
806 else if ((cli_name(sptr))[0]) {
808 * Client changing its nick
810 * If the client belongs to me, then check to see
811 * if client is on any channels where it is currently
812 * banned. If so, do not allow the nick change to occur.
815 const char* channel_name;
816 struct Membership *member;
817 if ((channel_name = find_no_nickchange_channel(sptr))) {
818 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
821 * Refuse nick change if the last nick change was less
822 * then 30 seconds ago. This is intended to get rid of
823 * clone bots doing NICK FLOOD. -SeKs
824 * If someone didn't change their nick for more then 60 seconds
825 * however, allow to do two nick changes immediately after another
826 * before limiting the nick flood. -Run
828 if (CurrentTime < cli_nextnick(cptr))
830 cli_nextnick(cptr) += 2;
831 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
832 cli_nextnick(cptr) - CurrentTime);
833 /* Send error message */
834 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
835 /* bounce NICK to user */
836 return 0; /* ignore nick change! */
839 /* Limit total to 1 change per NICK_DELAY seconds: */
840 cli_nextnick(cptr) += NICK_DELAY;
841 /* However allow _maximal_ 1 extra consecutive nick change: */
842 if (cli_nextnick(cptr) < CurrentTime)
843 cli_nextnick(cptr) = CurrentTime;
845 /* Invalidate all bans against the user so we check them again */
846 for (member = (cli_user(cptr))->channel; member;
847 member = member->next_channel)
848 ClearBanValid(member);
851 * Also set 'lastnick' to current time, if changed.
853 if (0 != ircd_strcmp(parv[0], nick))
854 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
857 * Client just changing his/her nick. If he/she is
858 * on a channel, send note of change to all clients
859 * on that channel. Propagate notice to other servers.
862 sendcmdto_common_channels_butone(sptr, CMD_NICK, NULL, ":%s", nick);
863 add_history(sptr, 1);
864 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
868 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
870 if ((cli_name(sptr))[0])
872 strcpy(cli_name(sptr), nick);
876 /* Local client setting NICK the first time */
878 strcpy(cli_name(sptr), nick);
879 if (!cli_user(sptr)) {
880 cli_user(sptr) = make_user(sptr);
881 cli_user(sptr)->server = &me;
885 cli_unreg(sptr) &= ~CLIREG_NICK; /* nickname now set */
888 * If the client hasn't gotten a cookie-ping yet,
889 * choose a cookie and send it. -record!jegelhof@cloud9.net
891 if (!cli_cookie(sptr)) {
893 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
894 } while (!cli_cookie(sptr));
895 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
897 else if (!cli_unreg(sptr)) {
899 * USER and PONG already received, now we have NICK.
900 * register_user may reject the client and call exit_client
901 * for it - must test this and exit m_nick too !
903 cli_lastnick(sptr) = TStime(); /* Always local client */
904 if (register_user(cptr, sptr, nick, cli_user(sptr)->username) == CPTR_KILLED)
911 /** Calculate the hash value for a target.
912 * @param[in] target Pointer to target, cast to unsigned int.
913 * @return Hash value constructed from the pointer.
915 static unsigned char hash_target(unsigned int target)
917 return (unsigned char) (target >> 16) ^ (target >> 8);
920 /** Records \a target as a recent target for \a sptr.
921 * @param[in] sptr User who has sent to a new target.
922 * @param[in] target Target to add.
925 add_target(struct Client *sptr, void *target)
927 /* Ok, this shouldn't work esp on alpha
929 unsigned char hash = hash_target((unsigned long) target);
930 unsigned char* targets;
933 assert(cli_local(sptr));
935 targets = cli_targets(sptr);
940 for (i = 0; i < MAXTARGETS; ++i) {
941 if (targets[i] == hash)
947 memmove(&targets[RESERVEDTARGETS + 1],
948 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
949 targets[RESERVEDTARGETS] = hash;
952 /** Check whether \a sptr can send to or join \a target yet.
953 * @param[in] sptr User trying to join a channel or send a message.
954 * @param[in] target Target of the join or message.
955 * @param[in] name Name of the target.
956 * @param[in] created If non-zero, trying to join a new channel.
957 * @return Non-zero if too many target changes; zero if okay to send.
959 int check_target_limit(struct Client *sptr, void *target, const char *name,
962 unsigned char hash = hash_target((unsigned long) target);
964 unsigned char* targets;
967 assert(cli_local(sptr));
968 targets = cli_targets(sptr);
970 /* If user is invited to channel, give him/her a free target */
971 if (IsChannelName(name) && IsInvited(sptr, target))
975 * Same target as last time?
977 if (targets[0] == hash)
979 for (i = 1; i < MAXTARGETS; ++i) {
980 if (targets[i] == hash) {
981 memmove(&targets[1], &targets[0], i);
990 if (CurrentTime < cli_nexttarget(sptr)) {
991 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
995 cli_nexttarget(sptr) += 2;
996 send_reply(sptr, ERR_TARGETTOOFAST, name,
997 cli_nexttarget(sptr) - CurrentTime);
1002 cli_nexttarget(sptr) += TARGET_DELAY;
1003 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
1004 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
1007 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
1012 /** Allows a channel operator to avoid target change checks when
1013 * sending messages to users on their channel.
1014 * @param[in] source User sending the message.
1015 * @param[in] nick Destination of the message.
1016 * @param[in] channel Name of channel being sent to.
1017 * @param[in] text Message to send.
1018 * @param[in] is_notice If non-zero, use CNOTICE instead of CPRIVMSG.
1020 /* Added 971023 by Run. */
1021 int whisper(struct Client* source, const char* nick, const char* channel,
1022 const char* text, int is_notice)
1024 struct Client* dest;
1025 struct Channel* chptr;
1026 struct Membership* membership;
1028 assert(0 != source);
1030 assert(0 != channel);
1031 assert(MyUser(source));
1033 if (!(dest = FindUser(nick))) {
1034 return send_reply(source, ERR_NOSUCHNICK, nick);
1036 if (!(chptr = FindChannel(channel))) {
1037 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
1040 * compare both users channel lists, instead of the channels user list
1041 * since the link is the same, this should be a little faster for channels
1042 * with a lot of users
1044 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
1045 if (chptr == membership->channel)
1048 if (0 == membership) {
1049 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
1051 if (!IsVoicedOrOpped(membership)) {
1052 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
1055 * lookup channel in destination
1057 assert(0 != cli_user(dest));
1058 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
1059 if (chptr == membership->channel)
1062 if (0 == membership || IsZombie(membership)) {
1063 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
1065 if (is_silenced(source, dest))
1068 if (cli_user(dest)->away)
1069 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
1071 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
1073 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
1078 /** Send a user mode change for \a cptr to neighboring servers.
1079 * @param[in] cptr User whose mode is changing.
1080 * @param[in] sptr Client who sent us the mode change message.
1081 * @param[in] old Prior set of user flags.
1082 * @param[in] prop If non-zero, also include FLAG_OPER.
1084 void send_umode_out(struct Client *cptr, struct Client *sptr,
1085 struct Flags *old, int prop)
1088 struct Client *acptr;
1090 send_umode(NULL, sptr, old, prop ? SEND_UMODES : SEND_UMODES_BUT_OPER);
1092 for (i = HighestFd; i >= 0; i--)
1094 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
1095 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
1096 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
1098 if (cptr && MyUser(cptr))
1099 send_umode(cptr, sptr, old, ALL_UMODES);
1103 /** Call \a fmt for each Client named in \a names.
1104 * @param[in] sptr Client requesting information.
1105 * @param[in] names Space-delimited list of nicknames.
1106 * @param[in] rpl Base reply string for messages.
1107 * @param[in] fmt Formatting callback function.
1109 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1114 int users_found = 0;
1115 struct Client* acptr;
1122 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1124 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1125 if ((acptr = FindUser(name))) {
1127 msgq_append(0, mb, " ");
1128 (*fmt)(acptr, sptr, mb);
1130 if (5 == ++arg_count)
1133 send_buffer(sptr, mb, 0);
1137 /** Set \a flag on \a cptr and possibly hide the client's hostmask.
1138 * @param[in,out] cptr User who is getting a new flag.
1139 * @param[in] flag Some flag that affects host-hiding (FLAG_HIDDENHOST, FLAG_ACCOUNT).
1143 hide_hostmask(struct Client *cptr, unsigned int flag)
1145 struct Membership *chan;
1148 case FLAG_HIDDENHOST:
1149 /* Local users cannot set +x unless FEAT_HOST_HIDING is true. */
1150 if (MyConnect(cptr) && !feature_bool(FEAT_HOST_HIDING))
1154 /* Invalidate all bans against the user so we check them again */
1155 for (chan = (cli_user(cptr))->channel; chan;
1156 chan = chan->next_channel)
1157 ClearBanValid(chan);
1163 SetFlag(cptr, flag);
1164 if (!HasFlag(cptr, FLAG_HIDDENHOST) || !HasFlag(cptr, FLAG_ACCOUNT))
1167 sendcmdto_common_channels_butone(cptr, CMD_QUIT, cptr, ":Registered");
1168 ircd_snprintf(0, cli_user(cptr)->host, HOSTLEN, "%s.%s",
1169 cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
1171 /* ok, the client is now fully hidden, so let them know -- hikari */
1172 if (MyConnect(cptr))
1173 send_reply(cptr, RPL_HOSTHIDDEN, cli_user(cptr)->host);
1176 * Go through all channels the client was on, rejoin him
1177 * and set the modes, if any
1179 for (chan = cli_user(cptr)->channel; chan; chan = chan->next_channel)
1183 /* Send a JOIN unless the user's join has been delayed. */
1184 if (!IsDelayedJoin(chan))
1185 sendcmdto_channel_butserv_butone(cptr, CMD_JOIN, chan->channel, cptr, 0,
1186 "%H", chan->channel);
1187 if (IsChanOp(chan) && HasVoice(chan))
1188 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr, 0,
1189 "%H +ov %C %C", chan->channel, cptr,
1191 else if (IsChanOp(chan) || HasVoice(chan))
1192 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr, 0,
1193 "%H +%c %C", chan->channel, IsChanOp(chan) ? 'o' : 'v', cptr);
1198 /** Set a user's mode. This function checks that \a cptr is trying to
1199 * set his own mode, prevents local users from setting inappropriate
1200 * modes through this function, and applies any other side effects of
1201 * a successful mode change.
1203 * @param[in,out] cptr User setting someone's mode.
1204 * @param[in] sptr Client who sent the mode change message.
1205 * @param[in] parc Number of parameters in \a parv.
1206 * @param[in] parv Parameters to MODE.
1209 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1213 struct Client *acptr;
1216 struct Flags setflags;
1217 unsigned int tmpmask = 0;
1218 int snomask_given = 0;
1221 int do_host_hiding = 0;
1226 return need_more_params(sptr, "MODE");
1228 if (!(acptr = FindUser(parv[1])))
1230 if (MyConnect(sptr))
1231 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1235 if (IsServer(sptr) || sptr != acptr)
1238 sendwallto_group_butone(&me, WALL_WALLOPS, 0,
1239 "MODE for User %s from %s!%s", parv[1],
1240 cli_name(cptr), cli_name(sptr));
1242 send_reply(sptr, ERR_USERSDONTMATCH);
1250 for (i = 0; i < USERMODELIST_SIZE; i++)
1252 if (HasFlag(sptr, userModeList[i].flag) &&
1253 userModeList[i].flag != FLAG_ACCOUNT)
1254 *m++ = userModeList[i].c;
1257 send_reply(sptr, RPL_UMODEIS, buf);
1258 if (HasFlag(sptr, FLAG_SERVNOTICE) && MyConnect(sptr)
1259 && cli_snomask(sptr) !=
1260 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1261 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1266 * find flags already set for user
1267 * why not just copy them?
1269 setflags = cli_flags(sptr);
1271 if (MyConnect(sptr))
1272 tmpmask = cli_snomask(sptr);
1275 * parse mode change string(s)
1277 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1278 for (m = *p; *m; m++) {
1287 if (*(p + 1) && is_snomask(*(p + 1))) {
1289 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1290 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1293 tmpmask = (what == MODE_ADD) ?
1294 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1296 SetServNotice(sptr);
1298 ClearServNotice(sptr);
1301 if (what == MODE_ADD)
1307 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)
1324 ClrFlag(sptr, FLAG_OPER);
1325 ClrFlag(sptr, FLAG_LOCOP);
1326 if (MyConnect(sptr))
1328 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1329 cli_handler(sptr) = CLIENT_HANDLER;
1334 if (what == MODE_ADD)
1337 ClearInvisible(sptr);
1340 if (what == MODE_ADD)
1346 if (what == MODE_ADD)
1347 SetChannelService(sptr);
1349 ClearChannelService(sptr);
1352 if (what == MODE_ADD)
1358 if (what == MODE_ADD)
1362 send_reply(sptr, ERR_UMODEUNKNOWNFLAG, *m);
1368 * Evaluate rules for new user mode
1369 * Stop users making themselves operators too easily:
1371 if (!IsServer(cptr))
1373 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1375 if (!FlagHas(&setflags, FLAG_LOCOP) && IsLocOp(sptr))
1378 * new umode; servers can set it, local users cannot;
1379 * prevents users from /kick'ing or /mode -o'ing
1381 if (!FlagHas(&setflags, FLAG_CHSERV))
1382 ClearChannelService(sptr);
1384 * only send wallops to opers
1386 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1387 !FlagHas(&setflags, FLAG_WALLOP))
1389 if (feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY) && MyConnect(sptr) &&
1390 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_SERVNOTICE))
1392 ClearServNotice(sptr);
1393 set_snomask(sptr, 0, SNO_SET);
1395 if (feature_bool(FEAT_HIS_DEBUG_OPER_ONLY) &&
1396 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_DEBUG))
1399 if (MyConnect(sptr))
1401 if ((FlagHas(&setflags, FLAG_OPER) || FlagHas(&setflags, FLAG_LOCOP)) &&
1403 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPERATOR);
1405 if (SendServNotice(sptr))
1407 if (tmpmask != cli_snomask(sptr))
1408 set_snomask(sptr, tmpmask, SNO_SET);
1409 if (cli_snomask(sptr) && snomask_given)
1410 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1413 set_snomask(sptr, 0, SNO_SET);
1416 * Compare new flags with old flags and send string which
1417 * will cause servers to update correctly.
1419 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1423 client_set_privs(sptr, NULL); /* may set propagate privilege */
1425 /* remember propagate privilege setting */
1426 if (HasPriv(sptr, PRIV_PROPAGATE))
1428 if (FlagHas(&setflags, FLAG_OPER) && !IsOper(sptr))
1430 /* user no longer oper */
1432 client_set_privs(sptr, NULL); /* will clear propagate privilege */
1434 if (FlagHas(&setflags, FLAG_INVISIBLE) && !IsInvisible(sptr))
1435 --UserStats.inv_clients;
1436 if (!FlagHas(&setflags, FLAG_INVISIBLE) && IsInvisible(sptr))
1437 ++UserStats.inv_clients;
1438 if (!FlagHas(&setflags, FLAG_HIDDENHOST) && do_host_hiding)
1439 hide_hostmask(sptr, FLAG_HIDDENHOST);
1440 send_umode_out(cptr, sptr, &setflags, prop);
1445 /** Build a mode string to describe modes for \a cptr.
1446 * @param[in] cptr Some user.
1447 * @return Pointer to a static buffer.
1449 char *umode_str(struct Client *cptr)
1451 /* Maximum string size: "owidgrx\0" */
1454 struct Flags c_flags = cli_flags(cptr);
1456 if (!HasPriv(cptr, PRIV_PROPAGATE))
1457 FlagClr(&c_flags, FLAG_OPER);
1459 for (i = 0; i < USERMODELIST_SIZE; ++i)
1461 if (FlagHas(&c_flags, userModeList[i].flag) &&
1462 userModeList[i].flag >= FLAG_GLOBAL_UMODES)
1463 *m++ = userModeList[i].c;
1466 if (IsAccount(cptr))
1468 char* t = cli_user(cptr)->account;
1471 while ((*m++ = *t++))
1474 if (cli_user(cptr)->acc_create) {
1476 Debug((DEBUG_DEBUG, "Sending timestamped account in user mode for "
1477 "account \"%s\"; timestamp %Tu", cli_user(cptr)->account,
1478 cli_user(cptr)->acc_create));
1479 ircd_snprintf(0, t = nbuf, sizeof(nbuf), ":%Tu",
1480 cli_user(cptr)->acc_create);
1481 m--; /* back up over previous nul-termination */
1482 while ((*m++ = *t++))
1489 return umodeBuf; /* Note: static buffer, gets
1490 overwritten by send_umode() */
1493 /** Send a mode change string for \a sptr to \a cptr.
1494 * @param[in] cptr Destination of mode change message.
1495 * @param[in] sptr User whose mode has changed.
1496 * @param[in] old Pre-change set of modes for \a sptr.
1497 * @param[in] sendset One of ALL_UMODES, SEND_UMODES_BUT_OPER,
1498 * SEND_UMODES, to select which changed user modes to send.
1500 void send_umode(struct Client *cptr, struct Client *sptr, struct Flags *old,
1506 int what = MODE_NULL;
1509 * Build a string in umodeBuf to represent the change in the user's
1510 * mode between the new (cli_flags(sptr)) and 'old', but skipping
1511 * the modes indicated by sendset.
1515 for (i = 0; i < USERMODELIST_SIZE; ++i)
1517 flag = userModeList[i].flag;
1518 if (FlagHas(old, flag)
1519 == HasFlag(sptr, flag))
1525 case SEND_UMODES_BUT_OPER:
1526 if (flag == FLAG_OPER)
1528 /* and fall through */
1530 if (flag < FLAG_GLOBAL_UMODES)
1534 if (FlagHas(old, flag))
1536 if (what == MODE_DEL)
1537 *m++ = userModeList[i].c;
1542 *m++ = userModeList[i].c;
1545 else /* !FlagHas(old, flag) */
1547 if (what == MODE_ADD)
1548 *m++ = userModeList[i].c;
1553 *m++ = userModeList[i].c;
1558 if (*umodeBuf && cptr)
1559 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1563 * Check to see if this resembles a sno_mask. It is if 1) there is
1564 * at least one digit and 2) The first digit occurs before the first
1565 * alphabetic character.
1566 * @param[in] word Word to check for sno_mask-ness.
1567 * @return Non-zero if \a word looks like a server notice mask; zero if not.
1569 int is_snomask(char *word)
1573 for (; *word; word++)
1576 else if (IsAlpha(*word))
1582 /** Update snomask \a oldmask according to \a arg and \a what.
1583 * @param[in] oldmask Original user mask.
1584 * @param[in] arg Update string (either a number or '+'/'-' followed by a number).
1585 * @param[in] what MODE_ADD if adding the mask.
1586 * @return New value of service notice mask.
1588 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1590 unsigned int sno_what;
1591 unsigned int newmask;
1595 if (what == MODE_ADD)
1600 else if (*arg == '-')
1603 if (what == MODE_ADD)
1609 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1610 /* pity we don't have strtoul everywhere */
1611 newmask = (unsigned int)atoi(arg);
1612 if (sno_what == SNO_DEL)
1613 newmask = oldmask & ~newmask;
1614 else if (sno_what == SNO_ADD)
1619 /** Remove \a cptr from the singly linked list \a list.
1620 * @param[in] cptr Client to remove from list.
1621 * @param[in,out] list Pointer to head of list containing \a cptr.
1623 static void delfrom_list(struct Client *cptr, struct SLink **list)
1626 struct SLink* prv = NULL;
1628 for (tmp = *list; tmp; tmp = tmp->next) {
1629 if (tmp->value.cptr == cptr) {
1631 prv->next = tmp->next;
1641 /** Set \a cptr's server notice mask, according to \a what.
1642 * @param[in,out] cptr Client whose snomask is updating.
1643 * @param[in] newmask Base value for new snomask.
1644 * @param[in] what One of SNO_ADD, SNO_DEL, SNO_SET, to choose operation.
1646 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1648 unsigned int oldmask, diffmask; /* unsigned please */
1652 oldmask = cli_snomask(cptr);
1654 if (what == SNO_ADD)
1656 else if (what == SNO_DEL)
1657 newmask = oldmask & ~newmask;
1658 else if (what != SNO_SET) /* absolute set, no math needed */
1659 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1661 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1663 diffmask = oldmask ^ newmask;
1665 for (i = 0; diffmask >> i; i++) {
1666 if (((diffmask >> i) & 1))
1668 if (((newmask >> i) & 1))
1671 tmp->next = opsarray[i];
1672 tmp->value.cptr = cptr;
1676 /* not real portable :( */
1677 delfrom_list(cptr, &opsarray[i]);
1680 cli_snomask(cptr) = newmask;
1683 /** Check whether \a sptr is allowed to send a message to \a acptr.
1684 * If \a sptr is a remote user, it means some server has an outdated
1685 * SILENCE list for \a acptr, so send the missing SILENCE mask(s) back
1686 * in the direction of \a sptr. Skip the check if \a sptr is a server.
1687 * @param[in] sptr Client trying to send a message.
1688 * @param[in] acptr Destination of message.
1689 * @return Non-zero if \a sptr is SILENCEd by \a acptr, zero if not.
1691 int is_silenced(struct Client *sptr, struct Client *acptr)
1695 size_t buf_used, slen;
1698 if (IsServer(sptr) || !(user = cli_user(acptr))
1699 || !(found = find_ban(sptr, user->silence)))
1701 assert(!(found->flags & BAN_EXCEPTION));
1702 if (!MyConnect(sptr)) {
1703 /* Buffer positive silence to send back. */
1704 buf_used = strlen(found->banstr);
1705 memcpy(buf, found->banstr, buf_used);
1706 /* Add exceptions to buffer. */
1707 for (found = user->silence; found; found = found->next) {
1708 if (!(found->flags & BAN_EXCEPTION))
1710 slen = strlen(found->banstr);
1711 if (buf_used + slen + 4 > 400) {
1712 buf[buf_used] = '\0';
1713 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1717 buf[buf_used++] = ',';
1718 buf[buf_used++] = '+';
1719 buf[buf_used++] = '~';
1720 memcpy(buf + buf_used, found->banstr, slen);
1723 /* Flush silence buffer. */
1725 buf[buf_used] = '\0';
1726 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1733 /** Send RPL_ISUPPORT lines to \a cptr.
1734 * @param[in] cptr Client to send ISUPPORT to.
1738 send_supported(struct Client *cptr)
1740 char featurebuf[512];
1742 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1743 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1744 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1745 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1747 return 0; /* convenience return, if it's ever needed */