/* * IRC - Internet Relay Chat, ircd/m_kick.c * Copyright (C) 1990 Jarkko Oikarinen and * University of Oulu, Computing Center * * See file AUTHORS in IRC package for additional names of * the programmers. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 1, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id: m_kick.c 1893 2008-11-18 03:18:46Z entrope $ */ /* * m_functions execute protocol messages on this server: * * cptr is always NON-NULL, pointing to a *LOCAL* client * structure (with an open socket connected!). This * identifies the physical socket where the message * originated (or which caused the m_function to be * executed--some m_functions may call others...). * * sptr is the source of the message, defined by the * prefix part of the message if present. If not * or prefix not found, then sptr==cptr. * * (!IsServer(cptr)) => (cptr == sptr), because * prefixes are taken *only* from servers... * * (IsServer(cptr)) * (sptr == cptr) => the message didn't * have the prefix. * * (sptr != cptr && IsServer(sptr) means * the prefix specified servername. (?) * * (sptr != cptr && !IsServer(sptr) means * that message originated from a remote * user (not local). * * combining * * (!IsServer(sptr)) means that, sptr can safely * taken as defining the target structure of the * message in this server. * * *Always* true (if 'parse' and others are working correct): * * 1) sptr->from == cptr (note: cptr->from == cptr) * * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr * *cannot* be a local connection, unless it's * actually cptr!). [MyConnect(x) should probably * be defined as (x == x->from) --msa ] * * parc number of variable parameter strings (if zero, * parv is allowed to be NULL) * * parv a NULL terminated list of parameter pointers, * * parv[0], sender (prefix string), if not present * this points to an empty string. * parv[1]...parv[parc-1] * pointers to additional parameters * parv[parc] == NULL, *always* * * note: it is guaranteed that parv[0]..parv[parc-1] are all * non-NULL pointers. */ #include "config.h" #include "channel.h" #include "client.h" #include "hash.h" #include "ircd.h" #include "ircd_log.h" #include "ircd_reply.h" #include "ircd_string.h" #include "msg.h" #include "numeric.h" #include "numnicks.h" #include "send.h" #include "ircd_features.h" /* #include -- Now using assert in ircd_log.h */ /* * m_kick - generic message handler * * parv[0] = sender prefix * parv[1] = channel * parv[2] = client to kick * parv[parc-1] = kick comment */ int m_kick(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) { struct Client *who; struct Channel *chptr; struct Membership *member = 0; struct Membership* member2; char *name, *comment; ClrFlag(sptr, FLAG_TS8); if (parc < 3 || *parv[1] == '\0') return need_more_params(sptr, "KICK"); name = parv[1]; /* simple checks */ if (!(chptr = get_channel(sptr, name, CGT_NO_CREATE))) return send_reply(sptr, ERR_NOSUCHCHANNEL, name); if (!(member2 = find_member_link(chptr, sptr)) || IsZombie(member2) || !(IsChanOp(member2) || IsHalfOp(member2))) return send_reply(sptr, ERR_CHANOPRIVSNEEDED, name); if (!(who = find_chasing(sptr, parv[2], 0))) return 0; /* find_chasing sends the reply for us */ /* Don't allow the channel service to be kicked */ if (IsChannelService(who) && IsService(cli_user(who)->server)) return send_reply(sptr, ERR_ISCHANSERVICE, cli_name(who), chptr->chname, "a network service"); if (IsChannelService(who) && !IsXtraOp(sptr) && (who!=sptr)) return send_reply(sptr, ERR_ISCHANSERVICE, cli_name(who), chptr->chname, "a IRC operator"); /* Prevent kicking opers from local channels -DM- */ if (IsLocalChannel(chptr->chname) && HasPriv(who, PRIV_DEOP_LCHAN)) return send_reply(sptr, ERR_ISOPERLCHAN, cli_name(who), chptr->chname); /* check if kicked user is actually on the channel */ if (!(member = find_member_link(chptr, who)) || IsZombie(member)) return send_reply(sptr, ERR_USERNOTINCHANNEL, cli_name(who), chptr->chname); /* Prevent halfops from kicking ops */ if (IsChanOp(member) && IsHalfOp(member2) && !IsChanOp(member2)) return send_reply(sptr, ERR_HALFCANTKICKOP, name); /* Don't allow to kick member with a higher op-level, * or members with the same op-level unless both are MAXOPLEVEL. */ if (OpLevel(member) < OpLevel(member2) || (OpLevel(member) == OpLevel(member2) && OpLevel(member) < MAXOPLEVEL)) return send_reply(sptr, ERR_NOTLOWEROPLEVEL, cli_name(who), chptr->chname, OpLevel(member2), OpLevel(member), "kick", OpLevel(member) == OpLevel(member2) ? "the same" : "a higher"); if (parc > 3) /* We rely on ircd_snprintf to truncate the comment */ comment = EmptyString(parv[parc - 1]) ? parv[0] : parv[parc - 1]; else comment = parv[0]; if (!IsLocalChannel(name)) sendcmdto_serv_butone(sptr, CMD_KICK, cptr, "%H %C :%s", chptr, who, comment); if (IsDelayedJoin(member)) { /* If it's a delayed join, only send the KICK to the person doing * the kicking and the victim */ if (MyUser(who)) sendcmdto_one(sptr, CMD_KICK, who, "%H %C :%s", chptr, who, comment); if (CapActive(sptr, CAP_EXTJOIN)) sendcmdto_one(who, CMD_JOIN, sptr, "%H %s :%s", chptr, IsAccount(who) ? cli_account(who) : "*", cli_info(who)); else sendcmdto_one(who, CMD_JOIN, sptr, "%H", chptr); sendcmdto_one(sptr, CMD_KICK, sptr, "%H %C :%s", chptr, who, comment); CheckDelayedJoins(chptr); } else sendcmdto_channel_butserv_butone(sptr, CMD_KICK, chptr, NULL, 0, "%H %C :%s", chptr, who, comment); make_zombie(member, who, cptr, sptr, chptr); return 0; } /* * ms_kick - server message handler * * parv[0] = sender prefix * parv[1] = channel * parv[2] = client to kick * parv[parc-1] = kick comment */ int ms_kick(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) { struct Client *who; struct Channel *chptr; struct Membership *member = 0, *sptr_link = 0; char *name, *comment; ClrFlag(sptr, FLAG_TS8); if (parc < 3 || *parv[1] == '\0') return need_more_params(sptr, "KICK"); name = parv[1]; comment = parv[parc - 1]; /* figure out who gets kicked from what */ if (IsLocalChannel(name) || !(chptr = get_channel(sptr, name, CGT_NO_CREATE)) || !(who = findNUser(parv[2]))) return 0; /* We go ahead and pass on the KICK for users not on the channel */ member = find_member_link(chptr, who); if (member && IsZombie(member)) { /* We might get a KICK from a zombie's own server because the user * net-rode during a burst (which always generates a KICK) *and* * was kicked via another server. In that case, we must remove * the user from the channel. */ if (sptr == cli_user(who)->server) { remove_user_from_channel(who, chptr); } /* Otherwise, we treat zombies like they are not channel members. */ member = 0; } /* Send HACK notice, but not for servers in BURST */ /* 2002-10-17: Don't send HACK if the users local server is kicking them */ if (IsServer(sptr) && !IsBurstOrBurstAck(sptr) && sptr!=cli_user(who)->server) sendto_opmask_butone(0, SNO_HACK4, "HACK: %C KICK %H %C %s", sptr, chptr, who, comment); /* Unless someone accepted it downstream (or the user isn't on the channel * here), if kicker is not on channel, or if kicker is not a channel * operator, bounce the kick */ if (!IsServer(sptr) && !IsChannelService(sptr) && member && cli_from(who) != cptr && (!(sptr_link = find_member_link(chptr, sptr)) || (!IsChanOp(sptr_link) && !IsHalfOp(sptr_link)))) { sendto_opmask_butone(0, SNO_HACK2, "HACK: %C KICK %H %C %s", sptr, chptr, who, comment); sendcmdto_one(who, CMD_JOIN, cptr, "%H", chptr); /* Reop/revoice member */ if (IsChanOp(member) || IsHalfOp(member) ||HasVoice(member)) { struct ModeBuf mbuf; modebuf_init(&mbuf, sptr, cptr, chptr, (MODEBUF_DEST_SERVER | /* Send mode to a server */ MODEBUF_DEST_DEOP | /* Deop the source */ MODEBUF_DEST_BOUNCE)); /* And bounce the MODE */ if (IsChanOp(member)) modebuf_mode_client(&mbuf, MODE_DEL | MODE_CHANOP, who, OpLevel(member)); if (IsHalfOp(member)) modebuf_mode_client(&mbuf, MODE_DEL | MODE_HALFOP, who, MAXOPLEVEL + 1); if (HasVoice(member)) modebuf_mode_client(&mbuf, MODE_DEL | MODE_VOICE, who, MAXOPLEVEL + 1); modebuf_flush(&mbuf); } } else { /* Propagate kick... */ sendcmdto_serv_butone(sptr, CMD_KICK, cptr, "%H %C :%s", chptr, who, comment); if (member) { /* and tell the channel about it */ if (IsDelayedJoin(member)) { if (MyUser(who)) sendcmdto_one(IsServer(sptr) ? &his : sptr, CMD_KICK, who, "%H %C :%s", chptr, who, comment); } else { sendcmdto_channel_butserv_butone(IsServer(sptr) ? &his : sptr, CMD_KICK, chptr, NULL, 0, "%H %C :%s", chptr, who, comment); } make_zombie(member, who, cptr, sptr, chptr); } } return 0; }