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  */
  25
  26 #include "stdinc.h"
  27 #include "client.h"
  28 #include "channel.h"
  29 #include "common.h"
  30 #include "match.h"
  31 #include "ircd.h"
  32 #include "s_serv.h"
  33 #include "numeric.h"
  34 #include "res.h"
  35 #include "s_conf.h"
  36 #include "s_newconf.h"
  37 #include "logger.h"
  38 #include "send.h"
  39 #include "msg.h"
  40 #include "parse.h"
  41 #include "modules.h"
  42 #include "hostmask.h"
  43 #include "reject.h"
  44 #include "hash.h"
  45 #include "cache.h"
  46
  47 static int mo_rehash(struct Client *, struct Client *, int, const char **);
  48 static int me_rehash(struct Client *, struct Client *, int, const char **);
  49
  50 struct Message rehash_msgtab = {
  51         "REHASH", 0, 0, 0, MFLG_SLOW,
  52         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_rehash, 0}, {mo_rehash, 0}}
  53 };
  54
  55 mapi_clist_av1 rehash_clist[] = { &rehash_msgtab, NULL };
  56 DECLARE_MODULE_AV1(rehash, NULL, NULL, rehash_clist, NULL, NULL, "$Revision: 3161 $");
  57
  58 struct hash_commands
  59 {
  60         const char *cmd;
  61         void (*handler) (struct Client * source_p);
  62 };
  63
  64 static void
  65 rehash_bans_loc(struct Client *source_p)
  66 {
  67         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing bans",
  68                                 get_oper_name(source_p));
  69         if (!MyConnect(source_p))
  70                 remote_rehash_oper_p = source_p;
  71
  72         rehash_bans(0);
  73 }
  74
  75 static void
  76 rehash_dns(struct Client *source_p)
  77 {
  78         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing DNS",
  79                              get_oper_name(source_p));
  80         if (!MyConnect(source_p))
  81                 remote_rehash_oper_p = source_p;
  82
  83         /* reread /etc/resolv.conf and reopen res socket */
  84         restart_resolver();
  85 }
  86
  87 static void
  88 rehash_motd(struct Client *source_p)
  89 {
  90         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  91                              "%s is forcing re-reading of MOTD file",
  92                              get_oper_name(source_p));
  93         if (!MyConnect(source_p))
  94                 remote_rehash_oper_p = source_p;
  95
  96         cache_user_motd();
  97 }
  98
  99 static void
 100 rehash_omotd(struct Client *source_p)
 101 {
 102         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 103                              "%s is forcing re-reading of OPER MOTD file",
 104                              get_oper_name(source_p));
 105         if (!MyConnect(source_p))
 106                 remote_rehash_oper_p = source_p;
 107
 108         free_cachefile(oper_motd);
 109         oper_motd = cache_file(OPATH, "opers.motd", 0);
 110 }
 111
 112 static void
 113 rehash_tklines(struct Client *source_p)
 114 {
 115         struct ConfItem *aconf;
 116         rb_dlink_node *ptr, *next_ptr;
 117         int i;
 118
 119         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 120                                 get_oper_name(source_p));
 121         if (!MyConnect(source_p))
 122                 remote_rehash_oper_p = source_p;
 123
 124         for(i = 0; i < LAST_TEMP_TYPE; i++)
 125         {
 126                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 127                 {
 128                         aconf = ptr->data;
 129
 130                         delete_one_address_conf(aconf->host, aconf);
 131                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 132                 }
 133         }
 134 }
 135
 136 static void
 137 rehash_tdlines(struct Client *source_p)
 138 {
 139         struct ConfItem *aconf;
 140         rb_dlink_node *ptr, *next_ptr;
 141         int i;
 142
 143         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 144                                 get_oper_name(source_p));
 145         if (!MyConnect(source_p))
 146                 remote_rehash_oper_p = source_p;
 147
 148         for(i = 0; i < LAST_TEMP_TYPE; i++)
 149         {
 150                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 151                 {
 152                         aconf = ptr->data;
 153
 154                         delete_one_address_conf(aconf->host, aconf);
 155                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 156                 }
 157         }
 158 }
 159
 160 static void
 161 rehash_txlines(struct Client *source_p)
 162 {
 163         struct ConfItem *aconf;
 164         rb_dlink_node *ptr;
 165         rb_dlink_node *next_ptr;
 166
 167         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 168                                 get_oper_name(source_p));
 169         if (!MyConnect(source_p))
 170                 remote_rehash_oper_p = source_p;
 171
 172         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 173         {
 174                 aconf = ptr->data;
 175
 176                 if(!aconf->hold || aconf->lifetime)
 177                         continue;
 178
 179                 free_conf(aconf);
 180                 rb_dlinkDestroy(ptr, &xline_conf_list);
 181         }
 182 }
 183
 184 static void
 185 rehash_tresvs(struct Client *source_p)
 186 {
 187         struct ConfItem *aconf;
 188         rb_dlink_node *ptr;
 189         rb_dlink_node *next_ptr;
 190         int i;
 191
 192         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 193                                 get_oper_name(source_p));
 194         if (!MyConnect(source_p))
 195                 remote_rehash_oper_p = source_p;
 196
 197         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 198         {
 199                 aconf = ptr->data;
 200
 201                 if(!aconf->hold || aconf->lifetime)
 202                         continue;
 203
 204                 free_conf(aconf);
 205                 rb_dlinkDestroy(ptr, &resvTable[i]);
 206         }
 207         HASH_WALK_END
 208
 209         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 210         {
 211                 aconf = ptr->data;
 212
 213                 if(!aconf->hold || aconf->lifetime)
 214                         continue;
 215
 216                 free_conf(aconf);
 217                 rb_dlinkDestroy(ptr, &resv_conf_list);
 218         }
 219 }
 220
 221 static void
 222 rehash_rejectcache(struct Client *source_p)
 223 {
 224         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 225                                 get_oper_name(source_p));
 226         if (!MyConnect(source_p))
 227                 remote_rehash_oper_p = source_p;
 228         flush_reject();
 229
 230 }
 231
 232 static void
 233 rehash_throttles(struct Client *source_p)
 234 {
 235         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing throttles",
 236                                 get_oper_name(source_p));
 237         if (!MyConnect(source_p))
 238                 remote_rehash_oper_p = source_p;
 239         flush_throttle();
 240
 241 }
 242
 243 static void
 244 rehash_help(struct Client *source_p)
 245 {
 246         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 247                              "%s is forcing re-reading of HELP files",
 248                              get_oper_name(source_p));
 249         if (!MyConnect(source_p))
 250                 remote_rehash_oper_p = source_p;
 251         load_help();
 252 }
 253
 254 static void
 255 rehash_nickdelay(struct Client *source_p)
 256 {
 257         struct nd_entry *nd;
 258         rb_dlink_node *ptr;
 259         rb_dlink_node *safe_ptr;
 260
 261         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 262                              "%s is clearing the nick delay table",
 263                              get_oper_name(source_p));
 264         if (!MyConnect(source_p))
 265                 remote_rehash_oper_p = source_p;
 266
 267         RB_DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 268         {
 269                 nd = ptr->data;
 270
 271                 free_nd_entry(nd);
 272         }
 273 }
 274
 275 /* *INDENT-OFF* */
 276 static struct hash_commands rehash_commands[] =
 277 {
 278         {"BANS",        rehash_bans_loc         },
 279         {"DNS",         rehash_dns              },
 280         {"MOTD",        rehash_motd             },
 281         {"OMOTD",       rehash_omotd            },
 282         {"TKLINES",     rehash_tklines          },
 283         {"TDLINES",     rehash_tdlines          },
 284         {"TXLINES",     rehash_txlines          },
 285         {"TRESVS",      rehash_tresvs           },
 286         {"REJECTCACHE", rehash_rejectcache      },
 287         {"THROTTLES",   rehash_throttles        },
 288         {"HELP",        rehash_help             },
 289         {"NICKDELAY",   rehash_nickdelay        },
 290         {NULL,          NULL                    }
 291 };
 292 /* *INDENT-ON* */
 293
 294 static void
 295 do_rehash(struct Client *source_p, const char *type)
 296 {
 297         if (type != NULL)
 298         {
 299                 int x;
 300                 char cmdbuf[100];
 301
 302                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 303                      x++)
 304                 {
 305                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 306                         {
 307                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 308                                            source_p->name, rehash_commands[x].cmd);
 309                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 310                                      get_oper_name(source_p), source_p->sockhost);
 311                                 rehash_commands[x].handler(source_p);
 312                                 remote_rehash_oper_p = NULL;
 313                                 return;
 314                         }
 315                 }
 316
 317                 /* We are still here..we didn't match */
 318                 cmdbuf[0] = '\0';
 319                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 320                      x++)
 321                 {
 322                         rb_strlcat(cmdbuf, " ", sizeof(cmdbuf));
 323                         rb_strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 324                 }
 325                 sendto_one_notice(source_p, ":rehash one of:%s", cmdbuf);
 326         }
 327         else
 328         {
 329                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 330                            ConfigFileEntry.configfile);
 331                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 332                                      "%s is rehashing server config file", get_oper_name(source_p));
 333                 if (!MyConnect(source_p))
 334                         remote_rehash_oper_p = source_p;
 335                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 336                      source_p->sockhost);
 337                 rehash(0);
 338                 remote_rehash_oper_p = NULL;
 339         }
 340 }
 341
 342 /*
 343  * mo_rehash - REHASH message handler
 344  *
 345  * parv[1] = rehash type or destination
 346  * parv[2] = destination
 347  */
 348 static int
 349 mo_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 350 {
 351         const char *type = NULL, *target_server = NULL;
 352
 353         if(!IsOperRehash(source_p))
 354         {
 355                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 356                            me.name, source_p->name, "rehash");
 357                 return 0;
 358         }
 359
 360         if (parc > 2)
 361                 type = parv[1], target_server = parv[2];
 362         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 363                 type = NULL, target_server = parv[1];
 364         else if (parc > 1)
 365                 type = parv[1], target_server = NULL;
 366         else
 367                 type = NULL, target_server = NULL;
 368
 369         if (target_server != NULL)
 370         {
 371                 if(!IsOperRemoteBan(source_p))
 372                 {
 373                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 374                                 me.name, source_p->name, "remoteban");
 375                         return 0;
 376                 }
 377                 sendto_match_servs(source_p, target_server,
 378                                 CAP_ENCAP, NOCAPS,
 379                                 "ENCAP %s REHASH %s",
 380                                 target_server, type != NULL ? type : "");
 381                 if (match(target_server, me.name) == 0)
 382                         return 0;
 383         }
 384
 385         do_rehash(source_p, type);
 386
 387         return 0;
 388 }
 389
 390 static int
 391 me_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 392 {
 393
 394         if (!IsPerson(source_p))
 395                 return 0;
 396
 397         if (!find_shared_conf(source_p->username, source_p->host,
 398                                 source_p->servptr->name, SHARED_REHASH))
 399                 return 0;
 400
 401         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 402
 403         return 0;
 404 }