modules/core/m_ban.c

   1 /*
   2  * charybdis: An advanced ircd.
   3  * m_ban.c: Propagates network bans across servers.
   4  *
   5  *  Copyright (C) 2010 Jilles Tjoelker
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are
   9  * met:
  10  *
  11  * 1.Redistributions of source code must retain the above copyright notice,
  12  *   this list of conditions and the following disclaimer.
  13  * 2.Redistributions in binary form must reproduce the above copyright
  14  *   notice, this list of conditions and the following disclaimer in the
  15  *   documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  21  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  25  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  26  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "stdinc.h"
  31 #include "send.h"
  32 #include "client.h"
  33 #include "common.h"
  34 #include "config.h"
  35 #include "ircd.h"
  36 #include "match.h"
  37 #include "s_conf.h"
  38 #include "msg.h"
  39 #include "modules.h"
  40 #include "hash.h"
  41 #include "s_serv.h"
  42 #include "operhash.h"
  43 #include "reject.h"
  44 #include "hostmask.h"
  45
  46 static int ms_ban(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
  47
  48 struct Message ban_msgtab = {
  49         "BAN", 0, 0, 0, MFLG_SLOW,
  50         {mg_unreg, mg_ignore, {ms_ban, 9}, {ms_ban, 9}, mg_ignore, mg_ignore}
  51 };
  52
  53 mapi_clist_av1 ban_clist[] =  { &ban_msgtab, NULL };
  54 DECLARE_MODULE_AV1(ban, NULL, NULL, ban_clist, NULL, NULL, "$Revision: 1349 $");
  55
  56 /* ms_ban()
  57  *
  58  * parv[1] - type
  59  * parv[2] - username mask or *
  60  * parv[3] - hostname mask
  61  * parv[4] - creation TS
  62  * parv[5] - duration (relative to creation)
  63  * parv[6] - lifetime (relative to creation)
  64  * parv[7] - oper or *
  65  * parv[8] - reason (possibly with |operreason)
  66  */
  67 static int
  68 ms_ban(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  69 {
  70         rb_dlink_node *ptr;
  71         struct ConfItem *aconf;
  72         unsigned int ntype;
  73         const char *oper, *stype;
  74         time_t created, hold, lifetime;
  75         char *p;
  76         int act;
  77
  78         if (strlen(parv[1]) != 1)
  79         {
  80                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
  81                                 "Unknown BAN type %s from %s",
  82                                 parv[1], source_p->name);
  83                 return 0;
  84         }
  85         switch (parv[1][0])
  86         {
  87                 case 'K':
  88                         ntype = CONF_KILL;
  89                         stype = "K-Line";
  90                         break;
  91                 default:
  92                         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
  93                                         "Unknown BAN type %s from %s",
  94                                         parv[1], source_p->name);
  95                         return 0;
  96         }
  97         created = atol(parv[4]);
  98         hold = created + atoi(parv[5]);
  99         lifetime = created + atoi(parv[6]);
 100         if (!strcmp(parv[7], "*"))
 101                 oper = IsServer(source_p) ? source_p->name : get_oper_name(source_p);
 102         else
 103                 oper = parv[7];
 104         ptr = find_prop_ban(ntype, parv[2], parv[3]);
 105         if (ptr != NULL)
 106         {
 107                 aconf = ptr->data;
 108                 if (aconf->created > created ||
 109                                 (aconf->created == created &&
 110                                  aconf->lifetime >= lifetime))
 111                 {
 112                         if (IsPerson(source_p))
 113                                 sendto_one_notice(source_p,
 114                                                 ":Your %s [%s%s%s] has been superseded",
 115                                                 stype,
 116                                                 aconf->user ? aconf->user : "",
 117                                                 aconf->user ? "@" : "",
 118                                                 aconf->host);
 119                         return 0;
 120                 }
 121                 act = !(aconf->status & CONF_ILLEGAL) || (hold != created &&
 122                                 hold > rb_current_time());
 123                 if (lifetime > aconf->lifetime)
 124                         aconf->lifetime = lifetime;
 125                 /* already expired, hmm */
 126                 if (aconf->lifetime <= rb_current_time())
 127                         return 0;
 128                 deactivate_conf(aconf, ptr);
 129                 rb_free(aconf->user);
 130                 aconf->user = NULL;
 131                 rb_free(aconf->host);
 132                 aconf->host = NULL;
 133                 operhash_delete(aconf->info.oper);
 134                 aconf->info.oper = NULL;
 135                 rb_free(aconf->passwd);
 136                 aconf->passwd = NULL;
 137                 rb_free(aconf->spasswd);
 138                 aconf->spasswd = NULL;
 139         }
 140         else
 141         {
 142                 aconf = make_conf();
 143                 aconf->status = CONF_ILLEGAL | ntype;
 144                 aconf->lifetime = lifetime;
 145                 rb_dlinkAddAlloc(aconf, &prop_bans);
 146                 act = hold != created && hold > rb_current_time();
 147         }
 148         aconf->flags &= ~CONF_FLAGS_MYOPER;
 149         aconf->flags |= CONF_FLAGS_TEMPORARY;
 150         aconf->user = ntype == CONF_KILL ? rb_strdup(parv[2]) : NULL;
 151         aconf->host = rb_strdup(parv[3]);
 152         aconf->info.oper = operhash_add(oper);
 153         aconf->created = created;
 154         aconf->hold = hold;
 155         p = strchr(parv[parc - 1], '|');
 156         if (p == NULL)
 157                 aconf->passwd = rb_strdup(parv[parc - 1]);
 158         else
 159         {
 160                 aconf->passwd = rb_strndup(parv[parc - 1], p - parv[parc - 1] + 1);
 161                 aconf->spasswd = rb_strdup(p + 1);
 162         }
 163         if (act && hold != created)
 164         {
 165                 /* Keep the notices in sync with modules/m_kline.c etc. */
 166                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 167                                        "%s added global %d min. %s%s%s for [%s%s%s] [%s]",
 168                                        IsServer(source_p) ? source_p->name : get_oper_name(source_p),
 169                                        (hold - rb_current_time()) / 60,
 170                                        stype,
 171                                        strcmp(parv[7], "*") ? " from " : "",
 172                                        strcmp(parv[7], "*") ? parv[7] : "",
 173                                        aconf->user ? aconf->user : "",
 174                                        aconf->user ? "@" : "",
 175                                        aconf->host,
 176                                        parv[parc - 1]);
 177                 ilog(L_KLINE, "%s %s %d %s %s %s", parv[1],
 178                                 IsServer(source_p) ? source_p->name : get_oper_name(source_p),
 179                                 (hold - rb_current_time()) / 60,
 180                                 aconf->user, aconf->host,
 181                                 parv[parc - 1]);
 182                 aconf->status &= ~CONF_ILLEGAL;
 183         }
 184         else if (act)
 185         {
 186                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 187                                 "%s has removed the global %s for: [%s%s%s]%s%s",
 188                                 IsServer(source_p) ? source_p->name : get_oper_name(source_p),
 189                                 stype,
 190                                 aconf->user ? aconf->user : "",
 191                                 aconf->user ? "@" : "",
 192                                 aconf->host,
 193                                 strcmp(parv[7], "*") ? " on behalf of " : "",
 194                                 strcmp(parv[7], "*") ? parv[7] : "");
 195                 ilog(L_KLINE, "U%s %s %s %s", parv[1],
 196                                 IsServer(source_p) ? source_p->name : get_oper_name(source_p),
 197                                 aconf->user, aconf->host);
 198         }
 199         switch (ntype)
 200         {
 201                 case CONF_KILL:
 202                         if (aconf->status & CONF_ILLEGAL)
 203                                 remove_reject_mask(aconf->user, aconf->host);
 204                         else
 205                         {
 206                                 add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf);
 207                                 if(ConfigFileEntry.kline_delay ||
 208                                                 (IsServer(source_p) &&
 209                                                  !HasSentEob(source_p)))
 210                                 {
 211                                         if(kline_queued == 0)
 212                                         {
 213                                                 rb_event_addonce("check_klines", check_klines_event, NULL,
 214                                                                  ConfigFileEntry.kline_delay);
 215                                                 kline_queued = 1;
 216                                         }
 217                                 }
 218                                 else
 219                                         check_klines();
 220                         }
 221                         break;
 222         }
 223         sendto_server(client_p, NULL, CAP_BAN|CAP_TS6, NOCAPS,
 224                         ":%s BAN %s %s %s %s %s %s %s :%s",
 225                         source_p->id,
 226                         parv[1],
 227                         parv[2],
 228                         parv[3],
 229                         parv[4],
 230                         parv[5],
 231                         parv[6],
 232                         parv[7],
 233                         parv[parc - 1]);
 234         return 0;
 235 }