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
  25 #include "stdinc.h"
  26 #include "client.h"
  27 #include "hash.h"               /* for find_client() */
  28 #include "ircd.h"
  29 #include "numeric.h"
  30 #include "logger.h"
  31 #include "s_serv.h"
  32 #include "s_conf.h"
  33 #include "send.h"
  34 #include "whowas.h"
  35 #include "match.h"
  36 #include "msg.h"
  37 #include "parse.h"
  38 #include "modules.h"
  39 #include "s_newconf.h"
  40
  41 static int h_can_kill;
  42 static char buf[BUFSIZE];
  43
  44 static int ms_kill(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  45 static int mo_kill(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  46 static void relay_kill(struct Client *, struct Client *, struct Client *,
  47                        const char *, const char *);
  48 static const char kill_desc[] = "Provides the KILL command to remove a user from the network";
  49
  50 struct Message kill_msgtab = {
  51         "KILL", 0, 0, 0, 0,
  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 mapi_hlist_av1 kill_hlist[] = {
  58         { "can_kill", &h_can_kill },
  59         { NULL, NULL},
  60 };
  61
  62 DECLARE_MODULE_AV2(kill, NULL, NULL, kill_clist, kill_hlist, NULL, NULL, NULL, kill_desc);
  63
  64 /*
  65 ** mo_kill
  66 **      parv[1] = kill victim
  67 **      parv[2] = kill path
  68 */
  69 static int
  70 mo_kill(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  71 {
  72         struct Client *target_p;
  73         const char *inpath = client_p->name;
  74         const char *user;
  75         const char *reason;
  76         hook_data_client_approval moduledata;
  77
  78         user = parv[1];
  79
  80         if(!IsOperLocalKill(source_p))
  81         {
  82                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "local_kill");
  83                 return 0;
  84         }
  85
  86         if(!EmptyString(parv[2]))
  87         {
  88                 char *s;
  89                 s = LOCAL_COPY(parv[2]);
  90                 if(strlen(s) > (size_t) KILLLEN)
  91                         s[KILLLEN] = '\0';
  92                 reason = s;
  93         }
  94         else
  95                 reason = "<No reason given>";
  96
  97         if((target_p = find_named_person(user)) == NULL)
  98         {
  99                 /*
 100                  ** If the user has recently changed nick, automatically
 101                  ** rewrite the KILL for this new nickname--this keeps
 102                  ** servers in synch when nick change and kill collide
 103                  */
 104                 if((target_p = whowas_get_history(user, (long) KILLCHASETIMELIMIT)) == NULL)
 105                 {
 106                         if (strchr(user, '.'))
 107                                 sendto_one_numeric(source_p, ERR_CANTKILLSERVER, form_str(ERR_CANTKILLSERVER));
 108                         else
 109                                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 110                                                    form_str(ERR_NOSUCHNICK), user);
 111                         return 0;
 112                 }
 113                 sendto_one_notice(source_p, ":KILL changed from %s to %s", user, target_p->name);
 114         }
 115
 116         if(!MyConnect(target_p) && (!IsOperGlobalKill(source_p)))
 117         {
 118                 sendto_one_notice(source_p, ":Nick %s is not on your server "
 119                                             "and you do not have the global_kill flag",
 120                                 target_p->name);
 121                 return 0;
 122         }
 123
 124         /* Last chance to stop the kill */
 125         moduledata.client = source_p;
 126         moduledata.target = target_p;
 127         moduledata.approved = 1;
 128         call_hook(h_can_kill, &moduledata);
 129
 130         if (moduledata.approved == 0)
 131                 /* The callee should have sent a message. */
 132                 return 0;
 133
 134         if(MyConnect(target_p))
 135                 sendto_one(target_p, ":%s!%s@%s KILL %s :%s",
 136                            source_p->name, source_p->username, source_p->host,
 137                            target_p->name, reason);
 138
 139         /* Do not change the format of this message.  There's no point in changing messages
 140          * that have been around for ever, for no reason.. */
 141         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 142                              "Received KILL message for %s!%s@%s. From %s Path: %s (%s)",
 143                              target_p->name, target_p->username, target_p->orighost,
 144                              source_p->name, me.name, reason);
 145
 146         ilog(L_KILL, "%c %s %s!%s@%s %s %s",
 147              MyConnect(target_p) ? 'L' : 'G', get_oper_name(source_p),
 148              target_p->name, target_p->username, target_p->host, target_p->servptr->name, reason);
 149
 150         /*
 151          ** And pass on the message to other servers. Note, that if KILL
 152          ** was changed, the message has to be sent to all links, also
 153          ** back.
 154          ** Suicide kills are NOT passed on --SRB
 155          */
 156         if(!MyConnect(target_p))
 157         {
 158                 relay_kill(client_p, source_p, target_p, inpath, reason);
 159                 /*
 160                  ** Set FLAGS_KILLED. This prevents exit_one_client from sending
 161                  ** the unnecessary QUIT for this. (This flag should never be
 162                  ** set in any other place)
 163                  */
 164                 target_p->flags |= FLAGS_KILLED;
 165         }
 166
 167         sprintf(buf, "Killed (%s (%s))", source_p->name, reason);
 168
 169         exit_client(client_p, target_p, source_p, buf);
 170
 171         return 0;
 172 }
 173
 174 /*
 175  * ms_kill
 176  *      parv[1] = kill victim
 177  *      parv[2] = kill path and reason
 178  */
 179 static int
 180 ms_kill(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 181 {
 182         struct Client *target_p;
 183         const char *user;
 184         const char *reason;
 185         char default_reason[] = "<No reason given>";
 186         const char *path;
 187
 188         *buf = '\0';
 189
 190         user = parv[1];
 191
 192         if(EmptyString(parv[2]))
 193         {
 194                 reason = default_reason;
 195
 196                 /* hyb6 takes the nick of the killer from the path *sigh* --fl_ */
 197                 path = source_p->name;
 198         }
 199         else
 200         {
 201                 char *s = LOCAL_COPY(parv[2]), *t;
 202                 t = strchr(s, ' ');
 203
 204                 if(t)
 205                 {
 206                         *t = '\0';
 207                         t++;
 208                         reason = t;
 209                 }
 210                 else
 211                         reason = default_reason;
 212
 213                 path = s;
 214         }
 215
 216         if((target_p = find_person(user)) == NULL)
 217         {
 218                 /*
 219                  * If the user has recently changed nick, but only if its
 220                  * not an uid, automatically rewrite the KILL for this new nickname.
 221                  * --this keeps servers in synch when nick change and kill collide
 222                  */
 223                 if(IsDigit(*user) || (!(target_p = whowas_get_history(user, (long) KILLCHASETIMELIMIT))))
 224                 {
 225                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 226                                            form_str(ERR_NOSUCHNICK), IsDigit(*user) ? "*" : user);
 227                         return 0;
 228                 }
 229                 sendto_one_notice(source_p, ":KILL changed from %s to %s", user, target_p->name);
 230         }
 231
 232         if(IsServer(target_p) || IsMe(target_p))
 233         {
 234                 sendto_one_numeric(source_p, ERR_CANTKILLSERVER, form_str(ERR_CANTKILLSERVER));
 235                 return 0;
 236         }
 237
 238         if(MyConnect(target_p))
 239         {
 240                 if(IsServer(source_p))
 241                 {
 242                         sendto_one(target_p, ":%s KILL %s :%s",
 243                                    source_p->name, target_p->name, reason);
 244                 }
 245                 else
 246                         sendto_one(target_p, ":%s!%s@%s KILL %s :%s",
 247                                    source_p->name, source_p->username, source_p->host,
 248                                    target_p->name, reason);
 249         }
 250
 251         /* Be warned, this message must be From %s, or it confuses clients
 252          * so dont change it to From: or the case or anything! -- fl -- db */
 253         /* path must contain at least 2 !'s, or bitchx falsely declares it
 254          * local --fl
 255          */
 256         if(IsOper(source_p))    /* send it normally */
 257         {
 258                 sendto_realops_snomask(IsService(source_p) ? SNO_SKILL : SNO_GENERAL, L_ALL,
 259                                      "Received KILL message for %s!%s@%s. From %s Path: %s!%s!%s!%s %s",
 260                                      target_p->name, target_p->username, target_p->orighost, source_p->name,
 261                                      source_p->servptr->name, source_p->host, source_p->username,
 262                                      source_p->name, reason);
 263
 264                 ilog(L_KILL, "%c %s %s!%s@%s %s %s",
 265                      MyConnect(target_p) ? 'O' : 'R', get_oper_name(source_p),
 266                      target_p->name, target_p->username, target_p->host,
 267                      target_p->servptr->name, reason);
 268         }
 269         else
 270         {
 271                 sendto_realops_snomask(SNO_SKILL, L_ALL,
 272                                      "Received KILL message for %s!%s@%s. From %s %s",
 273                                      target_p->name, target_p->username, target_p->orighost,
 274                                      source_p->name, reason);
 275
 276                 ilog(L_KILL, "S %s %s!%s@%s %s %s",
 277                      source_p->name, target_p->name, target_p->username,
 278                      target_p->host, target_p->servptr->name, reason);
 279         }
 280
 281         relay_kill(client_p, source_p, target_p, path, reason);
 282
 283         /* FLAGS_KILLED prevents a quit being sent out */
 284         target_p->flags |= FLAGS_KILLED;
 285
 286         sprintf(buf, "Killed (%s %s)", source_p->name, reason);
 287
 288         exit_client(client_p, target_p, source_p, buf);
 289
 290         return 0;
 291 }
 292
 293 static void
 294 relay_kill(struct Client *one, struct Client *source_p,
 295            struct Client *target_p, const char *inpath, const char *reason)
 296 {
 297         struct Client *client_p;
 298         rb_dlink_node *ptr;
 299         char buffer[BUFSIZE];
 300
 301         if(MyClient(source_p))
 302                 snprintf(buffer, sizeof(buffer),
 303                             "%s!%s!%s!%s (%s)",
 304                             me.name, source_p->host, source_p->username, source_p->name, reason);
 305         else
 306                 snprintf(buffer, sizeof(buffer), "%s %s", inpath, reason);
 307
 308         RB_DLINK_FOREACH(ptr, serv_list.head)
 309         {
 310                 client_p = ptr->data;
 311
 312                 if(!client_p || client_p == one)
 313                         continue;
 314
 315                 sendto_one(client_p, ":%s KILL %s :%s",
 316                            get_id(source_p, client_p), get_id(target_p, client_p), buffer);
 317         }
 318 }