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         if (!MyConnect(source_p))
  71                 remote_rehash_oper_p = source_p;
  72
  73         rehash_bans(0);
  74 }
  75
  76 static void
  77 rehash_dns(struct Client *source_p)
  78 {
  79         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing DNS",
  80                              get_oper_name(source_p));
  81         if (!MyConnect(source_p))
  82                 remote_rehash_oper_p = source_p;
  83
  84         /* reread /etc/resolv.conf and reopen res socket */
  85         restart_resolver();
  86 }
  87
  88 static void
  89 rehash_motd(struct Client *source_p)
  90 {
  91         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  92                              "%s is forcing re-reading of MOTD file",
  93                              get_oper_name(source_p));
  94         if (!MyConnect(source_p))
  95                 remote_rehash_oper_p = source_p;
  96
  97         cache_user_motd();
  98 }
  99
 100 static void
 101 rehash_omotd(struct Client *source_p)
 102 {
 103         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 104                              "%s is forcing re-reading of OPER MOTD file",
 105                              get_oper_name(source_p));
 106         if (!MyConnect(source_p))
 107                 remote_rehash_oper_p = source_p;
 108
 109         free_cachefile(oper_motd);
 110         oper_motd = cache_file(OPATH, "opers.motd", 0);
 111 }
 112
 113 static void
 114 rehash_tklines(struct Client *source_p)
 115 {
 116         struct ConfItem *aconf;
 117         rb_dlink_node *ptr, *next_ptr;
 118         int i;
 119
 120         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 121                                 get_oper_name(source_p));
 122         if (!MyConnect(source_p))
 123                 remote_rehash_oper_p = source_p;
 124
 125         for(i = 0; i < LAST_TEMP_TYPE; i++)
 126         {
 127                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 128                 {
 129                         aconf = ptr->data;
 130
 131                         delete_one_address_conf(aconf->host, aconf);
 132                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 133                 }
 134         }
 135 }
 136
 137 static void
 138 rehash_tdlines(struct Client *source_p)
 139 {
 140         struct ConfItem *aconf;
 141         rb_dlink_node *ptr, *next_ptr;
 142         int i;
 143
 144         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 145                                 get_oper_name(source_p));
 146         if (!MyConnect(source_p))
 147                 remote_rehash_oper_p = source_p;
 148
 149         for(i = 0; i < LAST_TEMP_TYPE; i++)
 150         {
 151                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 152                 {
 153                         aconf = ptr->data;
 154
 155                         delete_one_address_conf(aconf->host, aconf);
 156                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 157                 }
 158         }
 159 }
 160
 161 static void
 162 rehash_txlines(struct Client *source_p)
 163 {
 164         struct ConfItem *aconf;
 165         rb_dlink_node *ptr;
 166         rb_dlink_node *next_ptr;
 167
 168         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 169                                 get_oper_name(source_p));
 170         if (!MyConnect(source_p))
 171                 remote_rehash_oper_p = source_p;
 172
 173         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 174         {
 175                 aconf = ptr->data;
 176
 177                 if(!aconf->hold || aconf->lifetime)
 178                         continue;
 179
 180                 free_conf(aconf);
 181                 rb_dlinkDestroy(ptr, &xline_conf_list);
 182         }
 183 }
 184
 185 static void
 186 rehash_tresvs(struct Client *source_p)
 187 {
 188         struct ConfItem *aconf;
 189         rb_dlink_node *ptr;
 190         rb_dlink_node *next_ptr;
 191         int i;
 192
 193         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 194                                 get_oper_name(source_p));
 195         if (!MyConnect(source_p))
 196                 remote_rehash_oper_p = source_p;
 197
 198         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 199         {
 200                 aconf = ptr->data;
 201
 202                 if(!aconf->hold || aconf->lifetime)
 203                         continue;
 204
 205                 free_conf(aconf);
 206                 rb_dlinkDestroy(ptr, &resvTable[i]);
 207         }
 208         HASH_WALK_END
 209
 210         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 211         {
 212                 aconf = ptr->data;
 213
 214                 if(!aconf->hold || aconf->lifetime)
 215                         continue;
 216
 217                 free_conf(aconf);
 218                 rb_dlinkDestroy(ptr, &resv_conf_list);
 219         }
 220 }
 221
 222 static void
 223 rehash_rejectcache(struct Client *source_p)
 224 {
 225         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 226                                 get_oper_name(source_p));
 227         if (!MyConnect(source_p))
 228                 remote_rehash_oper_p = source_p;
 229         flush_reject();
 230
 231 }
 232
 233 static void
 234 rehash_throttles(struct Client *source_p)
 235 {
 236         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing throttles",
 237                                 get_oper_name(source_p));
 238         if (!MyConnect(source_p))
 239                 remote_rehash_oper_p = source_p;
 240         flush_throttle();
 241
 242 }
 243
 244 static void
 245 rehash_help(struct Client *source_p)
 246 {
 247         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 248                              "%s is forcing re-reading of HELP files",
 249                              get_oper_name(source_p));
 250         if (!MyConnect(source_p))
 251                 remote_rehash_oper_p = source_p;
 252         load_help();
 253 }
 254
 255 static void
 256 rehash_nickdelay(struct Client *source_p)
 257 {
 258         struct nd_entry *nd;
 259         rb_dlink_node *ptr;
 260         rb_dlink_node *safe_ptr;
 261
 262         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 263                              "%s is clearing the nick delay table",
 264                              get_oper_name(source_p));
 265         if (!MyConnect(source_p))
 266                 remote_rehash_oper_p = source_p;
 267
 268         RB_DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 269         {
 270                 nd = ptr->data;
 271
 272                 free_nd_entry(nd);
 273         }
 274 }
 275
 276 /* *INDENT-OFF* */
 277 static struct hash_commands rehash_commands[] =
 278 {
 279         {"BANS",        rehash_bans_loc         },
 280         {"DNS",         rehash_dns              },
 281         {"MOTD",        rehash_motd             },
 282         {"OMOTD",       rehash_omotd            },
 283         {"TKLINES",     rehash_tklines          },
 284         {"TDLINES",     rehash_tdlines          },
 285         {"TXLINES",     rehash_txlines          },
 286         {"TRESVS",      rehash_tresvs           },
 287         {"REJECTCACHE", rehash_rejectcache      },
 288         {"THROTTLES",   rehash_throttles        },
 289         {"HELP",        rehash_help             },
 290         {"NICKDELAY",   rehash_nickdelay        },
 291         {NULL,          NULL                    }
 292 };
 293 /* *INDENT-ON* */
 294
 295 static void
 296 do_rehash(struct Client *source_p, const char *type)
 297 {
 298         if (type != NULL)
 299         {
 300                 int x;
 301                 char cmdbuf[100];
 302
 303                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 304                      x++)
 305                 {
 306                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 307                         {
 308                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 309                                            source_p->name, rehash_commands[x].cmd);
 310                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 311                                      get_oper_name(source_p), source_p->sockhost);
 312                                 rehash_commands[x].handler(source_p);
 313                                 remote_rehash_oper_p = NULL;
 314                                 return;
 315                         }
 316                 }
 317
 318                 /* We are still here..we didn't match */
 319                 cmdbuf[0] = '\0';
 320                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 321                      x++)
 322                 {
 323                         rb_strlcat(cmdbuf, " ", sizeof(cmdbuf));
 324                         rb_strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 325                 }
 326                 sendto_one_notice(source_p, ":rehash one of:%s", cmdbuf);
 327         }
 328         else
 329         {
 330                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 331                            ConfigFileEntry.configfile);
 332                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 333                                      "%s is rehashing server config file", get_oper_name(source_p));
 334                 if (!MyConnect(source_p))
 335                         remote_rehash_oper_p = source_p;
 336                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 337                      source_p->sockhost);
 338                 rehash(0);
 339                 remote_rehash_oper_p = NULL;
 340         }
 341 }
 342
 343 /*
 344  * mo_rehash - REHASH message handler
 345  *
 346  * parv[1] = rehash type or destination
 347  * parv[2] = destination
 348  */
 349 static int
 350 mo_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 351 {
 352         const char *type = NULL, *target_server = NULL;
 353
 354         if(!IsOperRehash(source_p))
 355         {
 356                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 357                            me.name, source_p->name, "rehash");
 358                 return 0;
 359         }
 360
 361         if (parc > 2)
 362                 type = parv[1], target_server = parv[2];
 363         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 364                 type = NULL, target_server = parv[1];
 365         else if (parc > 1)
 366                 type = parv[1], target_server = NULL;
 367         else
 368                 type = NULL, target_server = NULL;
 369
 370         if (target_server != NULL)
 371         {
 372                 if(!IsOperRemoteBan(source_p))
 373                 {
 374                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 375                                 me.name, source_p->name, "remoteban");
 376                         return 0;
 377                 }
 378                 sendto_match_servs(source_p, target_server,
 379                                 CAP_ENCAP, NOCAPS,
 380                                 "ENCAP %s REHASH %s",
 381                                 target_server, type != NULL ? type : "");
 382                 if (match(target_server, me.name) == 0)
 383                         return 0;
 384         }
 385
 386         do_rehash(source_p, type);
 387
 388         return 0;
 389 }
 390
 391 static int
 392 me_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 393 {
 394
 395         if (!IsPerson(source_p))
 396                 return 0;
 397
 398         if (!find_shared_conf(source_p->username, source_p->host,
 399                                 source_p->servptr->name, SHARED_REHASH))
 400                 return 0;
 401
 402         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 403
 404         return 0;
 405 }