extensions/m_remove.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_kick.c: Kicks a user from a channel.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   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 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  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.
  18  *
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  */
  24
  25 #include "stdinc.h"
  26 #include "channel.h"
  27 #include "client.h"
  28 #include "match.h"
  29 #include "ircd.h"
  30 #include "numeric.h"
  31 #include "send.h"
  32 #include "msg.h"
  33 #include "modules.h"
  34 #include "parse.h"
  35 #include "hash.h"
  36 #include "packet.h"
  37 #include "s_serv.h"
  38 #include "s_conf.h"
  39 #include "hook.h"
  40 #include "messages.h"
  41
  42 static const char description[] = "Provides the REMOVE command, an alternative to KICK";
  43
  44 static void m_remove(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  45 static void remove_quote_part(void *);
  46
  47 unsigned int CAP_REMOVE;
  48 static char part_buf[REASONLEN + 1];
  49
  50 struct Message remove_msgtab = {
  51         "REMOVE", 0, 0, 0, 0,
  52         {mg_unreg, {m_remove, 3}, {m_remove, 3}, {m_remove, 3}, mg_ignore, {m_remove, 3}}
  53 };
  54
  55 mapi_clist_av1 remove_clist[] = { &remove_msgtab, NULL };
  56 mapi_hfn_list_av1 remove_hfnlist[] = {
  57         { "privmsg_channel", remove_quote_part },
  58         { NULL, NULL }
  59 };
  60 mapi_cap_list_av2 remove_cap_list[] = {
  61         { MAPI_CAP_SERVER, "REMOVE", NULL, &CAP_REMOVE },
  62         { 0, NULL, NULL, NULL }
  63 };
  64
  65 DECLARE_MODULE_AV2(remove, NULL, NULL, remove_clist, NULL, remove_hfnlist, remove_cap_list, NULL, description);
  66
  67 static void
  68 m_remove(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  69 {
  70         struct membership *sourcems, *targetms;
  71         struct Client *who;
  72         struct Channel *chptr;
  73         int chasing = 0;
  74         char *comment;
  75         const char *name;
  76         char *p = NULL;
  77         const char *user;
  78         static char buf[BUFSIZE];
  79
  80         if(MyClient(source_p) && !IsFloodDone(source_p))
  81                 flood_endgrace(source_p);
  82
  83         *buf = '\0';
  84         if((p = strchr(parv[1], ',')))
  85                 *p = '\0';
  86
  87         name = parv[1];
  88
  89         chptr = find_channel(name);
  90         if(chptr == NULL)
  91         {
  92                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL), name);
  93                 return;
  94         }
  95
  96         if(!IsServer(source_p))
  97         {
  98                 sourcems = find_channel_membership(chptr, source_p);
  99
 100                 if((sourcems == NULL) && MyConnect(source_p))
 101                 {
 102                         sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 103                                            form_str(ERR_NOTONCHANNEL), name);
 104                         return;
 105                 }
 106
 107                 if(get_channel_access(source_p, chptr, sourcems, MODE_ADD, NULL) < CHFL_CHANOP)
 108                 {
 109                         if(MyConnect(source_p))
 110                         {
 111                                 sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 112                                            me.name, source_p->name, name);
 113                                 return;
 114                         }
 115
 116                         /* If its a TS 0 channel, do it the old way */
 117                         if(chptr->channelts == 0)
 118                         {
 119                                 sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 120                                            get_id(&me, source_p), get_id(source_p, source_p), name);
 121                                 return;
 122                         }
 123                 }
 124
 125                 /* Its a user doing a kick, but is not showing as chanop locally
 126                  * its also not a user ON -my- server, and the channel has a TS.
 127                  * There are two cases we can get to this point then...
 128                  *
 129                  *     1) connect burst is happening, and for some reason a legit
 130                  *        op has sent a KICK, but the SJOIN hasn't happened yet or
 131                  *        been seen. (who knows.. due to lag...)
 132                  *
 133                  *     2) The channel is desynced. That can STILL happen with TS
 134                  *
 135                  *     Now, the old code roger wrote, would allow the KICK to
 136                  *     go through. Thats quite legit, but lets weird things like
 137                  *     KICKS by users who appear not to be chanopped happen,
 138                  *     or even neater, they appear not to be on the channel.
 139                  *     This fits every definition of a desync, doesn't it? ;-)
 140                  *     So I will allow the KICK, otherwise, things are MUCH worse.
 141                  *     But I will warn it as a possible desync.
 142                  *
 143                  *     -Dianora
 144                  */
 145         }
 146
 147         if((p = strchr(parv[2], ',')))
 148                 *p = '\0';
 149
 150         user = parv[2];         /* strtoken(&p2, parv[2], ","); */
 151
 152         if(!(who = find_chasing(source_p, user, &chasing)))
 153         {
 154                 return;
 155         }
 156
 157         targetms = find_channel_membership(chptr, who);
 158
 159         if(targetms != NULL)
 160         {
 161                 if(MyClient(source_p) && IsService(who))
 162                 {
 163                         sendto_one(source_p, form_str(ERR_ISCHANSERVICE),
 164                                    me.name, source_p->name, who->name, chptr->chname);
 165                         return;
 166                 }
 167
 168                 if(MyClient(source_p))
 169                 {
 170                         hook_data_channel_approval hookdata;
 171
 172                         hookdata.client = source_p;
 173                         hookdata.chptr = chptr;
 174                         hookdata.msptr = sourcems;
 175                         hookdata.target = who;
 176                         hookdata.approved = 1;
 177                         hookdata.dir = MODE_ADD;        /* ensure modules like override speak up */
 178
 179                         call_hook(h_can_kick, &hookdata);
 180
 181                         if (!hookdata.approved)
 182                                 return;
 183                 }
 184
 185                 comment = LOCAL_COPY((EmptyString(parv[3])) ? who->name : parv[3]);
 186                 if(strlen(comment) > (size_t) REASONLEN)
 187                         comment[REASONLEN] = '\0';
 188
 189                 /* jdc
 190                  * - In the case of a server kicking a user (i.e. CLEARCHAN),
 191                  *   the kick should show up as coming from the server which did
 192                  *   the kick.
 193                  * - Personally, flame and I believe that server kicks shouldn't
 194                  *   be sent anyways.  Just waiting for some oper to abuse it...
 195                  */
 196                 sendto_channel_local(who, ALL_MEMBERS, chptr,
 197                                      ":%s!%s@%s PART %s :requested by %s (%s)",
 198                                      who->name, who->username,
 199                                      who->host, name, source_p->name, comment);
 200
 201                 sendto_server(client_p, chptr, CAP_REMOVE, NOCAPS,
 202                               ":%s REMOVE %s %s :%s",
 203                               use_id(source_p), chptr->chname, use_id(who), comment);
 204                 sendto_server(client_p, chptr, NOCAPS, CAP_REMOVE,
 205                               ":%s KICK %s %s :%s",
 206                               use_id(source_p), chptr->chname, use_id(who), comment);
 207
 208                 remove_user_from_channel(targetms);
 209         }
 210         else if (MyClient(source_p))
 211                 sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
 212                                    form_str(ERR_USERNOTINCHANNEL), user, name);
 213 }
 214
 215 static void
 216 remove_quote_part(void *data_)
 217 {
 218         hook_data_privmsg_channel *data = data_;
 219         if (data->approved || EmptyString(data->text) || data->msgtype != MESSAGE_TYPE_PART)
 220                 return;
 221
 222         rb_strlcpy(part_buf, "\"", sizeof(part_buf) - 1);
 223         rb_strlcat(part_buf, data->text, sizeof(part_buf) - 1);
 224         rb_strlcat(part_buf, "\"", sizeof(part_buf));
 225
 226         data->text = part_buf;
 227 }