modules/m_rehash.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_rehash.c: Re-reads the configuration file.
   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_rehash.c 3161 2007-01-25 07:23:01Z nenolod $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "channel.h"
  30 #include "common.h"
  31 #include "match.h"
  32 #include "ircd.h"
  33 #include "s_serv.h"
  34 #include "numeric.h"
  35 #include "res.h"
  36 #include "s_conf.h"
  37 #include "s_newconf.h"
  38 #include "logger.h"
  39 #include "send.h"
  40 #include "msg.h"
  41 #include "parse.h"
  42 #include "modules.h"
  43 #include "hostmask.h"
  44 #include "reject.h"
  45 #include "hash.h"
  46 #include "cache.h"
  47
  48 static int mo_rehash(struct Client *, struct Client *, int, const char **);
  49 static int me_rehash(struct Client *, struct Client *, int, const char **);
  50
  51 struct Message rehash_msgtab = {
  52         "REHASH", 0, 0, 0, MFLG_SLOW,
  53         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_rehash, 0}, {mo_rehash, 0}}
  54 };
  55
  56 mapi_clist_av1 rehash_clist[] = { &rehash_msgtab, NULL };
  57 DECLARE_MODULE_AV1(rehash, NULL, NULL, rehash_clist, NULL, NULL, "$Revision: 3161 $");
  58
  59 struct hash_commands
  60 {
  61         const char *cmd;
  62         void (*handler) (struct Client * source_p);
  63 };
  64
  65 static void
  66 rehash_bans_loc(struct Client *source_p)
  67 {
  68         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing bans",
  69                                 get_oper_name(source_p));
  70
  71         rehash_bans(0);
  72 }
  73
  74 static void
  75 rehash_dns(struct Client *source_p)
  76 {
  77         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing DNS",
  78                              get_oper_name(source_p));
  79
  80         /* reread /etc/resolv.conf and reopen res socket */
  81         restart_resolver();
  82 }
  83
  84 static void
  85 rehash_motd(struct Client *source_p)
  86 {
  87         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  88                              "%s is forcing re-reading of MOTD file",
  89                              get_oper_name(source_p));
  90
  91         cache_user_motd();
  92 }
  93
  94 static void
  95 rehash_omotd(struct Client *source_p)
  96 {
  97         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  98                              "%s is forcing re-reading of OPER MOTD file",
  99                              get_oper_name(source_p));
 100
 101         free_cachefile(oper_motd);
 102         oper_motd = cache_file(OPATH, "opers.motd", 0);
 103 }
 104
 105 static void
 106 rehash_tklines(struct Client *source_p)
 107 {
 108         struct ConfItem *aconf;
 109         rb_dlink_node *ptr, *next_ptr;
 110         int i;
 111
 112         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 113                                 get_oper_name(source_p));
 114
 115         for(i = 0; i < LAST_TEMP_TYPE; i++)
 116         {
 117                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 118                 {
 119                         aconf = ptr->data;
 120
 121                         delete_one_address_conf(aconf->host, aconf);
 122                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 123                 }
 124         }
 125 }
 126
 127 static void
 128 rehash_tdlines(struct Client *source_p)
 129 {
 130         struct ConfItem *aconf;
 131         rb_dlink_node *ptr, *next_ptr;
 132         int i;
 133
 134         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 135                                 get_oper_name(source_p));
 136
 137         for(i = 0; i < LAST_TEMP_TYPE; i++)
 138         {
 139                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 140                 {
 141                         aconf = ptr->data;
 142
 143                         delete_one_address_conf(aconf->host, aconf);
 144                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 145                 }
 146         }
 147 }
 148
 149 static void
 150 rehash_txlines(struct Client *source_p)
 151 {
 152         struct ConfItem *aconf;
 153         rb_dlink_node *ptr;
 154         rb_dlink_node *next_ptr;
 155
 156         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 157                                 get_oper_name(source_p));
 158
 159         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 160         {
 161                 aconf = ptr->data;
 162
 163                 if(!aconf->hold)
 164                         continue;
 165
 166                 free_conf(aconf);
 167                 rb_dlinkDestroy(ptr, &xline_conf_list);
 168         }
 169 }
 170
 171 static void
 172 rehash_tresvs(struct Client *source_p)
 173 {
 174         struct ConfItem *aconf;
 175         rb_dlink_node *ptr;
 176         rb_dlink_node *next_ptr;
 177         int i;
 178
 179         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 180                                 get_oper_name(source_p));
 181
 182         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 183         {
 184                 aconf = ptr->data;
 185
 186                 if(!aconf->hold)
 187                         continue;
 188
 189                 free_conf(aconf);
 190                 rb_dlinkDestroy(ptr, &resvTable[i]);
 191         }
 192         HASH_WALK_END
 193
 194         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 195         {
 196                 aconf = ptr->data;
 197
 198                 if(!aconf->hold)
 199                         continue;
 200
 201                 free_conf(aconf);
 202                 rb_dlinkDestroy(ptr, &resv_conf_list);
 203         }
 204 }
 205
 206 static void
 207 rehash_rejectcache(struct Client *source_p)
 208 {
 209         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 210                                 get_oper_name(source_p));
 211         flush_reject();
 212
 213 }
 214
 215 static void
 216 rehash_help(struct Client *source_p)
 217 {
 218         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 219                              "%s is forcing re-reading of HELP files",
 220                              get_oper_name(source_p));
 221         load_help();
 222 }
 223
 224 static void
 225 rehash_nickdelay(struct Client *source_p)
 226 {
 227         struct nd_entry *nd;
 228         rb_dlink_node *ptr;
 229         rb_dlink_node *safe_ptr;
 230
 231         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 232                              "%s is clearing the nick delay table",
 233                              get_oper_name(source_p));
 234
 235         RB_DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 236         {
 237                 nd = ptr->data;
 238
 239                 free_nd_entry(nd);
 240         }
 241 }
 242
 243 /* *INDENT-OFF* */
 244 static struct hash_commands rehash_commands[] =
 245 {
 246         {"BANS",        rehash_bans_loc         },
 247         {"DNS",         rehash_dns              },
 248         {"MOTD",        rehash_motd             },
 249         {"OMOTD",       rehash_omotd            },
 250         {"TKLINES",     rehash_tklines          },
 251         {"TDLINES",     rehash_tdlines          },
 252         {"TXLINES",     rehash_txlines          },
 253         {"TRESVS",      rehash_tresvs           },
 254         {"REJECTCACHE", rehash_rejectcache      },
 255         {"HELP",        rehash_help             },
 256         {"NICKDELAY",   rehash_nickdelay        },
 257         {NULL,          NULL                    }
 258 };
 259 /* *INDENT-ON* */
 260
 261 static void
 262 do_rehash(struct Client *source_p, const char *type)
 263 {
 264         if (type != NULL)
 265         {
 266                 int x;
 267                 char cmdbuf[100];
 268
 269                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 270                      x++)
 271                 {
 272                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 273                         {
 274                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 275                                            source_p->name, rehash_commands[x].cmd);
 276                                 rehash_commands[x].handler(source_p);
 277                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 278                                      get_oper_name(source_p), source_p->sockhost);
 279                                 return;
 280                         }
 281                 }
 282
 283                 /* We are still here..we didn't match */
 284                 cmdbuf[0] = '\0';
 285                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 286                      x++)
 287                 {
 288                         rb_strlcat(cmdbuf, " ", sizeof(cmdbuf));
 289                         rb_strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 290                 }
 291                 sendto_one_notice(source_p, ":rehash one of:%s", cmdbuf);
 292         }
 293         else
 294         {
 295                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 296                            ConfigFileEntry.configfile);
 297                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 298                                      "%s is rehashing server config file", get_oper_name(source_p));
 299                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 300                      source_p->sockhost);
 301                 rehash(0);
 302         }
 303 }
 304
 305 /*
 306  * mo_rehash - REHASH message handler
 307  *
 308  * parv[1] = rehash type or destination
 309  * parv[2] = destination
 310  */
 311 static int
 312 mo_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 313 {
 314         const char *type = NULL, *target_server = NULL;
 315
 316         if(!IsOperRehash(source_p))
 317         {
 318                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 319                            me.name, source_p->name, "rehash");
 320                 return 0;
 321         }
 322
 323         if (parc > 2)
 324                 type = parv[1], target_server = parv[2];
 325         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 326                 type = NULL, target_server = parv[1];
 327         else if (parc > 1)
 328                 type = parv[1], target_server = NULL;
 329         else
 330                 type = NULL, target_server = NULL;
 331
 332         if (target_server != NULL)
 333         {
 334                 if(!IsOperRemoteBan(source_p))
 335                 {
 336                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 337                                 me.name, source_p->name, "remoteban");
 338                         return 0;
 339                 }
 340                 sendto_match_servs(source_p, target_server,
 341                                 CAP_ENCAP, NOCAPS,
 342                                 "ENCAP %s REHASH %s",
 343                                 target_server, type != NULL ? type : "");
 344                 if (match(target_server, me.name) == 0)
 345                         return 0;
 346         }
 347
 348         do_rehash(source_p, type);
 349
 350         return 0;
 351 }
 352
 353 static int
 354 me_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 355 {
 356
 357         if (!IsPerson(source_p))
 358                 return 0;
 359
 360         if (!find_shared_conf(source_p->username, source_p->host,
 361                                 source_p->servptr->name, SHARED_REHASH))
 362                 return 0;
 363
 364         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 365
 366         return 0;
 367 }