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
  25 #include "stdinc.h"
  26 #include "client.h"
  27 #include "match.h"
  28 #include "ircd.h"
  29 #include "numeric.h"
  30 #include "s_conf.h"
  31 #include "logger.h"
  32 #include "s_serv.h"
  33 #include "send.h"
  34 #include "msg.h"
  35 #include "parse.h"
  36 #include "modules.h"
  37 #include "hash.h"
  38 #include "s_newconf.h"
  39
  40 static const char squit_desc[] = "Provides the SQUIT command to cause a server to quit";
  41
  42 static void ms_squit(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  43 static void mo_squit(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  44
  45 struct Message squit_msgtab = {
  46         "SQUIT", 0, 0, 0, 0,
  47         {mg_unreg, mg_not_oper, {ms_squit, 0}, {ms_squit, 0}, mg_ignore, {mo_squit, 2}}
  48 };
  49
  50 mapi_clist_av1 squit_clist[] = { &squit_msgtab, NULL };
  51
  52 DECLARE_MODULE_AV2(squit, NULL, NULL, squit_clist, NULL, NULL, NULL, NULL, squit_desc);
  53
  54 struct squit_parms
  55 {
  56         const char *server_name;
  57         struct Client *target_p;
  58 };
  59
  60 static struct squit_parms *find_squit(struct Client *client_p,
  61                                       struct Client *source_p, const char *server);
  62
  63
  64 /*
  65  * mo_squit - SQUIT message handler
  66  *      parv[1] = server name
  67  *      parv[2] = comment
  68  */
  69 static void
  70 mo_squit(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  71 {
  72         struct squit_parms *found_squit;
  73         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
  74
  75         if((found_squit = find_squit(client_p, source_p, parv[1])))
  76         {
  77                 if(MyConnect(found_squit->target_p))
  78                 {
  79                         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
  80                                              "Received SQUIT %s from %s (%s)",
  81                                              found_squit->target_p->name,
  82                                              get_client_name(source_p, HIDE_IP), comment);
  83                         ilog(L_SERVER, "Received SQUIT %s from %s (%s)",
  84                              found_squit->target_p->name, log_client_name(source_p, HIDE_IP),
  85                              comment);
  86                 }
  87                 else if(!IsOperRemote(source_p))
  88                 {
  89                         sendto_one(source_p, form_str(ERR_NOPRIVS),
  90                                    me.name, source_p->name, "remote");
  91                         return;
  92                 }
  93
  94                 exit_client(client_p, found_squit->target_p, source_p, comment);
  95                 return;
  96         }
  97         else
  98         {
  99                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER), parv[1]);
 100         }
 101 }
 102
 103 /*
 104  * ms_squit - SQUIT message handler
 105  *      parv[1] = server name
 106  *      parv[2] = comment
 107  */
 108 static void
 109 ms_squit(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 110 {
 111         struct Client *target_p;
 112         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
 113
 114         if(parc < 2)
 115                 target_p = client_p;
 116         else
 117         {
 118                 if((target_p = find_server(NULL, parv[1])) == NULL)
 119                         return;
 120
 121                 if(IsMe(target_p))
 122                         target_p = client_p;
 123                 if(!IsServer(target_p))
 124                         return;
 125         }
 126
 127         /* Server is closing its link */
 128         if (target_p == client_p)
 129         {
 130                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Server %s closing link (%s)",
 131                                 target_p->name, comment);
 132         }
 133         /*
 134          **  Notify all opers, if my local link is remotely squitted
 135          */
 136         else if(MyConnect(target_p))
 137         {
 138                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Remote SQUIT %s from %s (%s)",
 139                                      target_p->name, source_p->name, comment);
 140
 141                 ilog(L_SERVER, "SQUIT From %s : %s (%s)", source_p->name, target_p->name, comment);
 142         }
 143         exit_client(client_p, target_p, source_p, comment);
 144 }
 145
 146
 147 /*
 148  * find_squit
 149  * inputs       - local server connection
 150  *              -
 151  *              -
 152  * output       - pointer to struct containing found squit or none if not found
 153  * side effects -
 154  */
 155 static struct squit_parms *
 156 find_squit(struct Client *client_p, struct Client *source_p, const char *server)
 157 {
 158         static struct squit_parms found_squit;
 159         struct Client *target_p = NULL;
 160         struct Client *p;
 161         rb_dlink_node *ptr;
 162
 163         /* must ALWAYS be reset */
 164         found_squit.target_p = NULL;
 165         found_squit.server_name = NULL;
 166
 167
 168         /*
 169          ** The following allows wild cards in SQUIT. Only useful
 170          ** when the command is issued by an oper.
 171          */
 172
 173         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 174         {
 175                 p = ptr->data;
 176                 if(IsServer(p) || IsMe(p))
 177                 {
 178                         if(match(server, p->name))
 179                         {
 180                                 target_p = p;
 181                                 break;
 182                         }
 183                 }
 184         }
 185
 186         if(target_p == NULL)
 187                 return NULL;
 188
 189         found_squit.target_p = target_p;
 190         found_squit.server_name = server;
 191
 192         if(IsMe(target_p))
 193         {
 194                 if(IsClient(client_p))
 195                 {
 196                         if(MyClient(client_p))
 197                                 sendto_one_notice(source_p, ":You are trying to squit me.");
 198
 199                         return NULL;
 200                 }
 201                 else
 202                 {
 203                         found_squit.target_p = client_p;
 204                         found_squit.server_name = client_p->name;
 205                 }
 206         }
 207
 208         if(found_squit.target_p != NULL)
 209                 return &found_squit;
 210         else
 211                 return (NULL);
 212 }