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[1] = server name
  68  *      parv[2] = comment
  69  */
  70 static int
  71 mo_squit(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  72 {
  73         struct squit_parms *found_squit;
  74         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
  75
  76         if((found_squit = find_squit(client_p, source_p, parv[1])))
  77         {
  78                 if(MyConnect(found_squit->target_p))
  79                 {
  80                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  81                                              "Received SQUIT %s from %s (%s)",
  82                                              found_squit->target_p->name,
  83                                              get_client_name(source_p, HIDE_IP), comment);
  84                         ilog(L_SERVER, "Received SQUIT %s from %s (%s)",
  85                              found_squit->target_p->name, log_client_name(source_p, HIDE_IP),
  86                              comment);
  87                 }
  88                 else if(!IsOperRemote(source_p))
  89                 {
  90                         sendto_one(source_p, form_str(ERR_NOPRIVS),
  91                                    me.name, source_p->name, "remote");
  92                         return 0;
  93                 }
  94
  95                 exit_client(client_p, found_squit->target_p, source_p, comment);
  96                 return 0;
  97         }
  98         else
  99         {
 100                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER), parv[1]);
 101         }
 102
 103         return 0;
 104 }
 105
 106 /*
 107  * ms_squit - SQUIT message handler
 108  *      parv[1] = server name
 109  *      parv[2] = comment
 110  */
 111 static int
 112 ms_squit(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 113 {
 114         struct Client *target_p;
 115         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
 116
 117         if(parc < 2)
 118                 target_p = client_p;
 119         else
 120         {
 121                 if((target_p = find_server(NULL, parv[1])) == NULL)
 122                         return 0;
 123
 124                 if(IsMe(target_p))
 125                         target_p = client_p;
 126                 if(!IsServer(target_p))
 127                         return 0;
 128         }
 129
 130         /* Server is closing its link */
 131         if (target_p == client_p)
 132         {
 133                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Server %s closing link (%s)",
 134                                 target_p->name, comment);
 135         }
 136         /*
 137          **  Notify all opers, if my local link is remotely squitted
 138          */
 139         else if(MyConnect(target_p))
 140         {
 141                 sendto_wallops_flags(UMODE_WALLOP, &me,
 142                                      "Remote SQUIT %s from %s (%s)",
 143                                      target_p->name, source_p->name, comment);
 144
 145                 sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 146                               ":%s WALLOPS :Remote SQUIT %s from %s (%s)",
 147                               me.id, target_p->name, source_p->name, comment);
 148
 149                 ilog(L_SERVER, "SQUIT From %s : %s (%s)", source_p->name, target_p->name, comment);
 150         }
 151         exit_client(client_p, target_p, source_p, comment);
 152         return 0;
 153 }
 154
 155
 156 /*
 157  * find_squit
 158  * inputs       - local server connection
 159  *              -
 160  *              -
 161  * output       - pointer to struct containing found squit or none if not found
 162  * side effects -
 163  */
 164 static struct squit_parms *
 165 find_squit(struct Client *client_p, struct Client *source_p, const char *server)
 166 {
 167         static struct squit_parms found_squit;
 168         struct Client *target_p = NULL;
 169         struct Client *p;
 170         rb_dlink_node *ptr;
 171
 172         /* must ALWAYS be reset */
 173         found_squit.target_p = NULL;
 174         found_squit.server_name = NULL;
 175
 176
 177         /*
 178          ** The following allows wild cards in SQUIT. Only useful
 179          ** when the command is issued by an oper.
 180          */
 181
 182         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 183         {
 184                 p = ptr->data;
 185                 if(IsServer(p) || IsMe(p))
 186                 {
 187                         if(match(server, p->name))
 188                         {
 189                                 target_p = p;
 190                                 break;
 191                         }
 192                 }
 193         }
 194
 195         if(target_p == NULL)
 196                 return NULL;
 197
 198         found_squit.target_p = target_p;
 199         found_squit.server_name = server;
 200
 201         if(IsMe(target_p))
 202         {
 203                 if(IsClient(client_p))
 204                 {
 205                         if(MyClient(client_p))
 206                                 sendto_one_notice(source_p, ":You are trying to squit me.");
 207
 208                         return NULL;
 209                 }
 210                 else
 211                 {
 212                         found_squit.target_p = client_p;
 213                         found_squit.server_name = client_p->name;
 214                 }
 215         }
 216
 217         if(found_squit.target_p != NULL)
 218                 return &found_squit;
 219         else
 220                 return (NULL);
 221 }