modules/core/m_kill.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_kill.c: Kills a user.
   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  *  $Id: m_kill.c 3408 2007-04-14 20:58:56Z jilles $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "hash.h"               /* for find_client() */
  30 #include "ircd.h"
  31 #include "numeric.h"
  32 #include "logger.h"
  33 #include "s_serv.h"
  34 #include "s_conf.h"
  35 #include "send.h"
  36 #include "whowas.h"
  37 #include "match.h"
  38 #include "msg.h"
  39 #include "parse.h"
  40 #include "modules.h"
  41 #include "s_newconf.h"
  42
  43 static char buf[BUFSIZE];
  44
  45 static int ms_kill(struct Client *, struct Client *, int, const char **);
  46 static int mo_kill(struct Client *, struct Client *, int, const char **);
  47 static void relay_kill(struct Client *, struct Client *, struct Client *,
  48                        const char *, const char *);
  49
  50 struct Message kill_msgtab = {
  51         "KILL", 0, 0, 0, MFLG_SLOW,
  52         {mg_unreg, mg_not_oper, {ms_kill, 2}, {ms_kill, 2}, mg_ignore, {mo_kill, 2}}
  53 };
  54
  55 mapi_clist_av1 kill_clist[] = { &kill_msgtab, NULL };
  56
  57 DECLARE_MODULE_AV1(kill, NULL, NULL, kill_clist, NULL, NULL, "$Revision: 3408 $");
  58
  59 /*
  60 ** mo_kill
  61 **      parv[0] = sender prefix
  62 **      parv[1] = kill victim
  63 **      parv[2] = kill path
  64 */
  65 static int
  66 mo_kill(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  67 {
  68         struct Client *target_p;
  69         const char *inpath = client_p->name;
  70         const char *user;
  71         const char *reason;
  72
  73         user = parv[1];
  74
  75         if(!IsOperLocalKill(source_p))
  76         {
  77                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "local_kill");
  78                 return 0;
  79         }
  80
  81         if(!EmptyString(parv[2]))
  82         {
  83                 char *s;
  84                 s = LOCAL_COPY(parv[2]);
  85                 if(strlen(s) > (size_t) KILLLEN)
  86                         s[KILLLEN] = '\0';
  87                 reason = s;
  88         }
  89         else
  90                 reason = "<No reason given>";
  91
  92         if((target_p = find_named_person(user)) == NULL)
  93         {
  94                 /*
  95                  ** If the user has recently changed nick, automatically
  96                  ** rewrite the KILL for this new nickname--this keeps
  97                  ** servers in synch when nick change and kill collide
  98                  */
  99                 if((target_p = get_history(user, (long) KILLCHASETIMELIMIT)) == NULL)
 100                 {
 101                         if (strchr(user, '.'))
 102                                 sendto_one_numeric(source_p, ERR_CANTKILLSERVER, form_str(ERR_CANTKILLSERVER));
 103                         else
 104                                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 105                                                    form_str(ERR_NOSUCHNICK), user);
 106                         return 0;
 107                 }
 108                 sendto_one_notice(source_p, ":KILL changed from %s to %s", user, target_p->name);
 109         }
 110
 111         if(!MyConnect(target_p) && (!IsOperGlobalKill(source_p)))
 112         {
 113                 sendto_one_notice(source_p, ":Nick %s is not on your server "
 114                                             "and you do not have the global_kill flag",
 115                                 target_p->name);
 116                 return 0;
 117         }
 118
 119         if(MyConnect(target_p))
 120                 sendto_one(target_p, ":%s!%s@%s KILL %s :%s",
 121                            source_p->name, source_p->username, source_p->host,
 122                            target_p->name, reason);
 123
 124         /* Do not change the format of this message.  There's no point in changing messages
 125          * that have been around for ever, for no reason.. */
 126         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 127                              "Received KILL message for %s!%s@%s. From %s Path: %s (%s)",
 128                              target_p->name, target_p->username, target_p->orighost,
 129                              parv[0], me.name, reason);
 130
 131         ilog(L_KILL, "%c %s %s!%s@%s %s %s",
 132              MyConnect(target_p) ? 'L' : 'G', get_oper_name(source_p),
 133              target_p->name, target_p->username, target_p->host, target_p->servptr->name, reason);
 134
 135         /*
 136          ** And pass on the message to other servers. Note, that if KILL
 137          ** was changed, the message has to be sent to all links, also
 138          ** back.
 139          ** Suicide kills are NOT passed on --SRB
 140          */
 141         if(!MyConnect(target_p))
 142         {
 143                 relay_kill(client_p, source_p, target_p, inpath, reason);
 144                 /*
 145                  ** Set FLAGS_KILLED. This prevents exit_one_client from sending
 146                  ** the unnecessary QUIT for this. (This flag should never be
 147                  ** set in any other place)
 148                  */
 149                 target_p->flags |= FLAGS_KILLED;
 150         }
 151
 152         rb_sprintf(buf, "Killed (%s (%s))", source_p->name, reason);
 153
 154         exit_client(client_p, target_p, source_p, buf);
 155
 156         return 0;
 157 }
 158
 159 /*
 160  * ms_kill
 161  *      parv[0] = sender prefix
 162  *      parv[1] = kill victim
 163  *      parv[2] = kill path and reason
 164  */
 165 static int
 166 ms_kill(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 167 {
 168         struct Client *target_p;
 169         const char *user;
 170         const char *reason;
 171         char default_reason[] = "<No reason given>";
 172         const char *path;
 173         int chasing = 0;
 174
 175         *buf = '\0';
 176
 177         user = parv[1];
 178
 179         if(EmptyString(parv[2]))
 180         {
 181                 reason = default_reason;
 182
 183                 /* hyb6 takes the nick of the killer from the path *sigh* --fl_ */
 184                 path = source_p->name;
 185         }
 186         else
 187         {
 188                 char *s = LOCAL_COPY(parv[2]), *t;
 189                 t = strchr(s, ' ');
 190
 191                 if(t)
 192                 {
 193                         *t = '\0';
 194                         t++;
 195                         reason = t;
 196                 }
 197                 else
 198                         reason = default_reason;
 199
 200                 path = s;
 201         }
 202
 203         if((target_p = find_person(user)) == NULL)
 204         {
 205                 /*
 206                  * If the user has recently changed nick, but only if its
 207                  * not an uid, automatically rewrite the KILL for this new nickname.
 208                  * --this keeps servers in synch when nick change and kill collide
 209                  */
 210                 if(IsDigit(*user) || (!(target_p = get_history(user, (long) KILLCHASETIMELIMIT))))
 211                 {
 212                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 213                                            form_str(ERR_NOSUCHNICK), IsDigit(*user) ? "*" : user);
 214                         return 0;
 215                 }
 216                 sendto_one_notice(source_p, ":KILL changed from %s to %s", user, target_p->name);
 217                 chasing = 1;
 218         }
 219
 220         if(IsServer(target_p) || IsMe(target_p))
 221         {
 222                 sendto_one_numeric(source_p, ERR_CANTKILLSERVER, form_str(ERR_CANTKILLSERVER));
 223                 return 0;
 224         }
 225
 226         if(MyConnect(target_p))
 227         {
 228                 if(IsServer(source_p))
 229                 {
 230                         sendto_one(target_p, ":%s KILL %s :%s",
 231                                    source_p->name, target_p->name, reason);
 232                 }
 233                 else
 234                         sendto_one(target_p, ":%s!%s@%s KILL %s :%s",
 235                                    source_p->name, source_p->username, source_p->host,
 236                                    target_p->name, reason);
 237         }
 238
 239         /* Be warned, this message must be From %s, or it confuses clients
 240          * so dont change it to From: or the case or anything! -- fl -- db */
 241         /* path must contain at least 2 !'s, or bitchx falsely declares it
 242          * local --fl
 243          */
 244         if(IsOper(source_p))    /* send it normally */
 245         {
 246                 sendto_realops_snomask(IsService(source_p) ? SNO_SKILL : SNO_GENERAL, L_ALL,
 247                                      "Received KILL message for %s!%s@%s. From %s Path: %s!%s!%s!%s %s",
 248                                      target_p->name, target_p->username, target_p->orighost, parv[0],
 249                                      source_p->servptr->name, source_p->host, source_p->username,
 250                                      source_p->name, reason);
 251
 252                 ilog(L_KILL, "%c %s %s!%s@%s %s %s",
 253                      MyConnect(target_p) ? 'O' : 'R', get_oper_name(source_p),
 254                      target_p->name, target_p->username, target_p->host,
 255                      target_p->servptr->name, reason);
 256         }
 257         else
 258         {
 259                 sendto_realops_snomask(SNO_SKILL, L_ALL,
 260                                      "Received KILL message for %s!%s@%s. From %s %s",
 261                                      target_p->name, target_p->username, target_p->orighost,
 262                                      parv[0], reason);
 263
 264                 ilog(L_KILL, "S %s %s!%s@%s %s %s",
 265                      source_p->name, target_p->name, target_p->username,
 266                      target_p->host, target_p->servptr->name, reason);
 267         }
 268
 269         relay_kill(client_p, source_p, target_p, path, reason);
 270
 271         /* FLAGS_KILLED prevents a quit being sent out */
 272         target_p->flags |= FLAGS_KILLED;
 273
 274         rb_sprintf(buf, "Killed (%s %s)", source_p->name, reason);
 275
 276         exit_client(client_p, target_p, source_p, buf);
 277
 278         return 0;
 279 }
 280
 281 static void
 282 relay_kill(struct Client *one, struct Client *source_p,
 283            struct Client *target_p, const char *inpath, const char *reason)
 284 {
 285         struct Client *client_p;
 286         rb_dlink_node *ptr;
 287         char buffer[BUFSIZE];
 288
 289         if(MyClient(source_p))
 290                 rb_snprintf(buffer, sizeof(buffer),
 291                             "%s!%s!%s!%s (%s)",
 292                             me.name, source_p->host, source_p->username, source_p->name, reason);
 293         else
 294                 rb_snprintf(buffer, sizeof(buffer), "%s %s", inpath, reason);
 295
 296         RB_DLINK_FOREACH(ptr, serv_list.head)
 297         {
 298                 client_p = ptr->data;
 299
 300                 if(!client_p || client_p == one)
 301                         continue;
 302
 303                 sendto_one(client_p, ":%s KILL %s :%s",
 304                            get_id(source_p, client_p), get_id(target_p, client_p), buffer);
 305         }
 306 }