modules/m_whowas.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_whois.c: Shows who a user was.
   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 "whowas.h"
  27 #include "client.h"
  28 #include "hash.h"
  29 #include "match.h"
  30 #include "ircd.h"
  31 #include "ircd_defs.h"
  32 #include "numeric.h"
  33 #include "s_serv.h"
  34 #include "s_user.h"
  35 #include "send.h"
  36 #include "s_conf.h"
  37 #include "msg.h"
  38 #include "parse.h"
  39 #include "modules.h"
  40 #include "s_newconf.h"
  41
  42 static const char whowas_desc[] =
  43         "Provides the WHOWAS command to display information on a disconnected user";
  44
  45 static void m_whowas(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  46
  47 struct Message whowas_msgtab = {
  48         "WHOWAS", 0, 0, 0, 0,
  49         {mg_unreg, {m_whowas, 2}, {m_whowas, 4}, mg_ignore, mg_ignore, {m_whowas, 2}}
  50 };
  51
  52 mapi_clist_av1 whowas_clist[] = { &whowas_msgtab, NULL };
  53
  54 DECLARE_MODULE_AV2(whowas, NULL, NULL, whowas_clist, NULL, NULL, NULL, NULL, whowas_desc);
  55
  56 /*
  57 ** m_whowas
  58 **      parv[1] = nickname queried
  59 */
  60 static void
  61 m_whowas(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  62 {
  63         rb_dlink_list *whowas_list;
  64         rb_dlink_node *ptr;
  65         int cur = 0;
  66         int max = -1;
  67         char *p;
  68         const char *nick;
  69         char tbuf[26];
  70         long sendq_limit;
  71
  72         static time_t last_used = 0L;
  73
  74         if(MyClient(source_p) && !IsOperGeneral(source_p))
  75         {
  76                 if(last_used + (parc > 3 ? ConfigFileEntry.pace_wait :
  77                                                 ConfigFileEntry.pace_wait_simple
  78                                 ) > rb_current_time())
  79                 {
  80                         sendto_one(source_p, form_str(RPL_LOAD2HI),
  81                                    me.name, source_p->name, "WHOWAS");
  82                         sendto_one_numeric(source_p, RPL_ENDOFWHOWAS, form_str(RPL_ENDOFWHOWAS),
  83                                    parv[1]);
  84                         return;
  85                 }
  86                 else
  87                         last_used = rb_current_time();
  88         }
  89
  90
  91         if(parc > 2)
  92                 max = atoi(parv[2]);
  93
  94         if(parc > 3)
  95                 if(hunt_server(client_p, source_p, ":%s WHOWAS %s %s :%s", 3, parc, parv))
  96                         return;
  97
  98         if(!MyClient(source_p) && (max <= 0 || max > 20))
  99                 max = 20;
 100
 101         if((p = strchr(parv[1], ',')))
 102                 *p = '\0';
 103
 104         nick = parv[1];
 105
 106         sendq_limit = get_sendq(client_p) * 9 / 10;
 107         whowas_list = whowas_get_list(nick);
 108
 109         if(whowas_list == NULL)
 110         {
 111                 sendto_one_numeric(source_p, ERR_WASNOSUCHNICK, form_str(ERR_WASNOSUCHNICK), nick);
 112                 sendto_one_numeric(source_p, RPL_ENDOFWHOWAS, form_str(RPL_ENDOFWHOWAS), parv[1]);
 113                 return;
 114         }
 115
 116         RB_DLINK_FOREACH(ptr, whowas_list->head)
 117         {
 118                 struct Whowas *temp = ptr->data;
 119                 if(cur > 0 && rb_linebuf_len(&client_p->localClient->buf_sendq) > sendq_limit)
 120                 {
 121                         sendto_one(source_p, form_str(ERR_TOOMANYMATCHES),
 122                                    me.name, source_p->name, "WHOWAS");
 123                         break;
 124                 }
 125
 126                 sendto_one(source_p, form_str(RPL_WHOWASUSER),
 127                            me.name, source_p->name, temp->name,
 128                            temp->username, temp->hostname, temp->realname);
 129                 if (!EmptyString(temp->sockhost) &&
 130                                 strcmp(temp->sockhost, "0") &&
 131                                 show_ip_whowas(temp, source_p))
 132                         sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
 133                                            form_str(RPL_WHOISACTUALLY),
 134                                            temp->name, temp->sockhost);
 135
 136                 if (!EmptyString(temp->suser))
 137                         sendto_one_numeric(source_p, RPL_WHOISLOGGEDIN,
 138                                            "%s %s :was logged in as",
 139                                            temp->name, temp->suser);
 140
 141                 sendto_one_numeric(source_p, RPL_WHOISSERVER,
 142                                    form_str(RPL_WHOISSERVER),
 143                                    temp->name, temp->servername,
 144                                    rb_ctime(temp->logoff, tbuf, sizeof(tbuf)));
 145
 146                 cur++;
 147                 if(max > 0 && cur >= max)
 148                         break;
 149         }
 150
 151         sendto_one_numeric(source_p, RPL_ENDOFWHOWAS, form_str(RPL_ENDOFWHOWAS), parv[1]);
 152 }