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 "common.h"             /* FALSE bleah */
  28 #include "match.h"
  29 #include "ircd.h"
  30 #include "numeric.h"
  31 #include "s_conf.h"
  32 #include "logger.h"
  33 #include "s_serv.h"
  34 #include "send.h"
  35 #include "msg.h"
  36 #include "parse.h"
  37 #include "modules.h"
  38 #include "hash.h"
  39 #include "s_newconf.h"
  40
  41 static int ms_squit(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  42 static int mo_squit(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  43
  44 struct Message squit_msgtab = {
  45         "SQUIT", 0, 0, 0, 0,
  46         {mg_unreg, mg_not_oper, {ms_squit, 0}, {ms_squit, 0}, mg_ignore, {mo_squit, 2}}
  47 };
  48
  49 mapi_clist_av1 squit_clist[] = { &squit_msgtab, NULL };
  50
  51 DECLARE_MODULE_AV2(squit, NULL, NULL, squit_clist, NULL, NULL, NULL, NULL, NULL);
  52
  53 struct squit_parms
  54 {
  55         const char *server_name;
  56         struct Client *target_p;
  57 };
  58
  59 static struct squit_parms *find_squit(struct Client *client_p,
  60                                       struct Client *source_p, const char *server);
  61
  62
  63 /*
  64  * mo_squit - SQUIT message handler
  65  *      parv[1] = server name
  66  *      parv[2] = comment
  67  */
  68 static int
  69 mo_squit(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  70 {
  71         struct squit_parms *found_squit;
  72         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
  73
  74         if((found_squit = find_squit(client_p, source_p, parv[1])))
  75         {
  76                 if(MyConnect(found_squit->target_p))
  77                 {
  78                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  79                                              "Received SQUIT %s from %s (%s)",
  80                                              found_squit->target_p->name,
  81                                              get_client_name(source_p, HIDE_IP), comment);
  82                         ilog(L_SERVER, "Received SQUIT %s from %s (%s)",
  83                              found_squit->target_p->name, log_client_name(source_p, HIDE_IP),
  84                              comment);
  85                 }
  86                 else if(!IsOperRemote(source_p))
  87                 {
  88                         sendto_one(source_p, form_str(ERR_NOPRIVS),
  89                                    me.name, source_p->name, "remote");
  90                         return 0;
  91                 }
  92
  93                 exit_client(client_p, found_squit->target_p, source_p, comment);
  94                 return 0;
  95         }
  96         else
  97         {
  98                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER), parv[1]);
  99         }
 100
 101         return 0;
 102 }
 103
 104 /*
 105  * ms_squit - SQUIT message handler
 106  *      parv[1] = server name
 107  *      parv[2] = comment
 108  */
 109 static int
 110 ms_squit(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 111 {
 112         struct Client *target_p;
 113         const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;
 114
 115         if(parc < 2)
 116                 target_p = client_p;
 117         else
 118         {
 119                 if((target_p = find_server(NULL, parv[1])) == NULL)
 120                         return 0;
 121
 122                 if(IsMe(target_p))
 123                         target_p = client_p;
 124                 if(!IsServer(target_p))
 125                         return 0;
 126         }
 127
 128         /* Server is closing its link */
 129         if (target_p == client_p)
 130         {
 131                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Server %s closing link (%s)",
 132                                 target_p->name, comment);
 133         }
 134         /*
 135          **  Notify all opers, if my local link is remotely squitted
 136          */
 137         else if(MyConnect(target_p))
 138         {
 139                 sendto_wallops_flags(UMODE_WALLOP, &me,
 140                                      "Remote SQUIT %s from %s (%s)",
 141                                      target_p->name, source_p->name, comment);
 142
 143                 sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 144                               ":%s WALLOPS :Remote SQUIT %s from %s (%s)",
 145                               me.id, target_p->name, source_p->name, comment);
 146
 147                 ilog(L_SERVER, "SQUIT From %s : %s (%s)", source_p->name, target_p->name, comment);
 148         }
 149         exit_client(client_p, target_p, source_p, comment);
 150         return 0;
 151 }
 152
 153
 154 /*
 155  * find_squit
 156  * inputs       - local server connection
 157  *              -
 158  *              -
 159  * output       - pointer to struct containing found squit or none if not found
 160  * side effects -
 161  */
 162 static struct squit_parms *
 163 find_squit(struct Client *client_p, struct Client *source_p, const char *server)
 164 {
 165         static struct squit_parms found_squit;
 166         struct Client *target_p = NULL;
 167         struct Client *p;
 168         rb_dlink_node *ptr;
 169
 170         /* must ALWAYS be reset */
 171         found_squit.target_p = NULL;
 172         found_squit.server_name = NULL;
 173
 174
 175         /*
 176          ** The following allows wild cards in SQUIT. Only useful
 177          ** when the command is issued by an oper.
 178          */
 179
 180         RB_DLINK_FOREACH(ptr, global_serv_list.head)
 181         {
 182                 p = ptr->data;
 183                 if(IsServer(p) || IsMe(p))
 184                 {
 185                         if(match(server, p->name))
 186                         {
 187                                 target_p = p;
 188                                 break;
 189                         }
 190                 }
 191         }
 192
 193         if(target_p == NULL)
 194                 return NULL;
 195
 196         found_squit.target_p = target_p;
 197         found_squit.server_name = server;
 198
 199         if(IsMe(target_p))
 200         {
 201                 if(IsClient(client_p))
 202                 {
 203                         if(MyClient(client_p))
 204                                 sendto_one_notice(source_p, ":You are trying to squit me.");
 205
 206                         return NULL;
 207                 }
 208                 else
 209                 {
 210                         found_squit.target_p = client_p;
 211                         found_squit.server_name = client_p->name;
 212                 }
 213         }
 214
 215         if(found_squit.target_p != NULL)
 216                 return &found_squit;
 217         else
 218                 return (NULL);
 219 }