modules/core/m_squit.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_squit.c: Makes a server quit.
   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_squit.c 3161 2007-01-25 07:23:01Z nenolod $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "common.h"             /* FALSE bleah */
  30 #include "match.h"
  31 #include "ircd.h"
  32 #include "numeric.h"
  33 #include "s_conf.h"
  34 #include "logger.h"
  35 #include "s_serv.h"
  36 #include "send.h"
  37 #include "msg.h"
  38 #include "parse.h"
  39 #include "modules.h"
  40 #include "hash.h"
  41 #include "s_newconf.h"
  42
  43 static int ms_squit(struct Client *, struct Client *, int, const char **);
  44 static int mo_squit(struct Client *, struct Client *, int, const char **);
  45
  46 struct Message squit_msgtab = {
  47         "SQUIT", 0, 0, 0, MFLG_SLOW,
  48         {mg_unreg, mg_not_oper, {ms_squit, 0}, {ms_squit, 0}, mg_ignore, {mo_squit, 2}}
  49 };
  50
  51 mapi_clist_av1 squit_clist[] = { &squit_msgtab, NULL };
  52
  53 DECLARE_MODULE_AV1(squit, NULL, NULL, squit_clist, NULL, NULL, "$Revision: 3161 $");
  54
  55 struct squit_parms
  56 {
  57         const char *server_name;
  58         struct Client *target_p;
  59 };
  60
  61 static struct squit_parms *find_squit(struct Client *client_p,
  62                                       struct Client *source_p, const char *server);
  63
  64
  65 /*
  66  * mo_squit - SQUIT message handler
  67  *      parv[0] = sender prefix
  68  *      parv[1] = server name
  69  *      parv[2] = comment
  70  */
  71 static int
  72 mo_squit(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  73 {
  74         struct squit_parms *found_squit;
  75         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
  76
  77         if((found_squit = find_squit(client_p, source_p, parv[1])))
  78         {
  79                 if(MyConnect(found_squit->target_p))
  80                 {
  81                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  82                                              "Received SQUIT %s from %s (%s)",
  83                                              found_squit->target_p->name,
  84                                              get_client_name(source_p, HIDE_IP), comment);
  85                         ilog(L_SERVER, "Received SQUIT %s from %s (%s)",
  86                              found_squit->target_p->name, log_client_name(source_p, HIDE_IP),
  87                              comment);
  88                 }
  89                 else if(!IsOperRemote(source_p))
  90                 {
  91                         sendto_one(source_p, form_str(ERR_NOPRIVS),
  92                                    me.name, source_p->name, "remote");
  93                         return 0;
  94                 }
  95
  96                 exit_client(client_p, found_squit->target_p, source_p, comment);
  97                 return 0;
  98         }
  99         else
 100         {
 101                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER), parv[1]);
 102         }
 103
 104         return 0;
 105 }
 106
 107 /*
 108  * ms_squit - SQUIT message handler
 109  *      parv[0] = sender prefix
 110  *      parv[1] = server name
 111  *      parv[2] = comment
 112  */
 113 static int
 114 ms_squit(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 115 {
 116         struct Client *target_p;
 117         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
 118
 119         if(parc < 2)
 120                 target_p = client_p;
 121         else
 122         {
 123                 if((target_p = find_server(NULL, parv[1])) == NULL)
 124                         return 0;
 125
 126                 if(IsMe(target_p))
 127                         target_p = client_p;
 128                 if(!IsServer(target_p))
 129                         return 0;
 130         }
 131
 132         /* Server is closing its link */
 133         if (target_p == client_p)
 134         {
 135                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Server %s closing link (%s)",
 136                                 target_p->name, comment);
 137         }
 138         /*
 139          **  Notify all opers, if my local link is remotely squitted
 140          */
 141         else if(MyConnect(target_p))
 142         {
 143                 sendto_wallops_flags(UMODE_WALLOP, &me,
 144                                      "Remote SQUIT %s from %s (%s)",
 145                                      target_p->name, source_p->name, comment);
 146
 147                 sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 148                               ":%s WALLOPS :Remote SQUIT %s from %s (%s)",
 149                               me.id, target_p->name, source_p->name, comment);
 150
 151                 ilog(L_SERVER, "SQUIT From %s : %s (%s)", parv[0], target_p->name, comment);
 152         }
 153         exit_client(client_p, target_p, source_p, comment);
 154         return 0;
 155 }
 156
 157
 158 /*
 159  * find_squit
 160  * inputs       - local server connection
 161  *              -
 162  *              -
 163  * output       - pointer to struct containing found squit or none if not found
 164  * side effects -
 165  */
 166 static struct squit_parms *
 167 find_squit(struct Client *client_p, struct Client *source_p, const char *server)
 168 {
 169         static struct squit_parms found_squit;
 170         struct Client *target_p = NULL;
 171         struct Client *p;
 172         rb_dlink_node *ptr;
 173
 174         /* must ALWAYS be reset */
 175         found_squit.target_p = NULL;
 176         found_squit.server_name = NULL;
 177
 178
 179         /*
 180          ** The following allows wild cards in SQUIT. Only useful
 181          ** when the command is issued by an oper.
 182          */
 183
 184         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 185         {
 186                 p = ptr->data;
 187                 if(IsServer(p) || IsMe(p))
 188                 {
 189                         if(match(server, p->name))
 190                         {
 191                                 target_p = p;
 192                                 break;
 193                         }
 194                 }
 195         }
 196
 197         if(target_p == NULL)
 198                 return NULL;
 199
 200         found_squit.target_p = target_p;
 201         found_squit.server_name = server;
 202
 203         if(IsMe(target_p))
 204         {
 205                 if(IsClient(client_p))
 206                 {
 207                         if(MyClient(client_p))
 208                                 sendto_one_notice(source_p, ":You are trying to squit me.");
 209
 210                         return NULL;
 211                 }
 212                 else
 213                 {
 214                         found_squit.target_p = client_p;
 215                         found_squit.server_name = client_p->name;
 216                 }
 217         }
 218
 219         if(found_squit.target_p != NULL)
 220                 return &found_squit;
 221         else
 222                 return (NULL);
 223 }