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 932 2006-03-05 03:39:14Z nenolod $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "channel.h"
  30 #include "common.h"
  31 #include "irc_string.h"
  32 #include "ircd.h"
  33 #include "s_gline.h"
  34 #include "s_serv.h"
  35 #include "numeric.h"
  36 #include "res.h"
  37 #include "s_conf.h"
  38 #include "s_newconf.h"
  39 #include "s_log.h"
  40 #include "send.h"
  41 #include "msg.h"
  42 #include "parse.h"
  43 #include "modules.h"
  44 #include "hostmask.h"
  45 #include "reject.h"
  46 #include "hash.h"
  47 #include "cache.h"
  48
  49 static int mo_rehash(struct Client *, struct Client *, int, const char **);
  50 static int me_rehash(struct Client *, struct Client *, int, const char **);
  51
  52 struct Message rehash_msgtab = {
  53         "REHASH", 0, 0, 0, MFLG_SLOW,
  54         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_rehash, 0}, {mo_rehash, 0}}
  55 };
  56
  57 mapi_clist_av1 rehash_clist[] = { &rehash_msgtab, NULL };
  58 DECLARE_MODULE_AV1(rehash, NULL, NULL, rehash_clist, NULL, NULL, "$Revision: 932 $");
  59
  60 struct hash_commands
  61 {
  62         const char *cmd;
  63         void (*handler) (struct Client * source_p);
  64 };
  65
  66 static void
  67 rehash_bans_loc(struct Client *source_p)
  68 {
  69         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing bans",
  70                                 get_oper_name(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
  81         /* reread /etc/resolv.conf and reopen res socket */
  82         restart_resolver();
  83 }
  84
  85 static void
  86 rehash_motd(struct Client *source_p)
  87 {
  88         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  89                              "%s is forcing re-reading of MOTD file",
  90                              get_oper_name(source_p));
  91
  92         free_cachefile(user_motd);
  93         user_motd = cache_file(MPATH, "ircd.motd", 0);
  94 }
  95
  96 static void
  97 rehash_omotd(struct Client *source_p)
  98 {
  99         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 100                              "%s is forcing re-reading of OPER MOTD file",
 101                              get_oper_name(source_p));
 102
 103         free_cachefile(oper_motd);
 104         oper_motd = cache_file(OPATH, "opers.motd", 0);
 105 }
 106
 107 static void
 108 rehash_glines(struct Client *source_p)
 109 {
 110         struct ConfItem *aconf;
 111         dlink_node *ptr, *next_ptr;
 112
 113         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing G-lines",
 114                                 get_oper_name(source_p));
 115
 116         DLINK_FOREACH_SAFE(ptr, next_ptr, glines.head)
 117         {
 118                 aconf = ptr->data;
 119
 120                 delete_one_address_conf(aconf->host, aconf);
 121                 dlinkDestroy(ptr, &glines);
 122         }
 123 }
 124
 125 static void
 126 rehash_pglines(struct Client *source_p)
 127 {
 128         struct gline_pending *glp_ptr;
 129         dlink_node *ptr;
 130         dlink_node *next_ptr;
 131
 132         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing pending glines",
 133                                 get_oper_name(source_p));
 134
 135         DLINK_FOREACH_SAFE(ptr, next_ptr, pending_glines.head)
 136         {
 137                 glp_ptr = ptr->data;
 138
 139                 MyFree(glp_ptr->reason1);
 140                 MyFree(glp_ptr->reason2);
 141                 MyFree(glp_ptr);
 142                 dlinkDestroy(ptr, &pending_glines);
 143         }
 144 }
 145
 146 static void
 147 rehash_tklines(struct Client *source_p)
 148 {
 149         struct ConfItem *aconf;
 150         dlink_node *ptr, *next_ptr;
 151         int i;
 152
 153         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 154                                 get_oper_name(source_p));
 155
 156         for(i = 0; i < LAST_TEMP_TYPE; i++)
 157         {
 158                 DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 159                 {
 160                         aconf = ptr->data;
 161
 162                         delete_one_address_conf(aconf->host, aconf);
 163                         dlinkDestroy(ptr, &temp_klines[i]);
 164                 }
 165         }
 166 }
 167
 168 static void
 169 rehash_tdlines(struct Client *source_p)
 170 {
 171         struct ConfItem *aconf;
 172         dlink_node *ptr, *next_ptr;
 173         int i;
 174
 175         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 176                                 get_oper_name(source_p));
 177
 178         for(i = 0; i < LAST_TEMP_TYPE; i++)
 179         {
 180                 DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 181                 {
 182                         aconf = ptr->data;
 183
 184                         delete_one_address_conf(aconf->host, aconf);
 185                         dlinkDestroy(ptr, &temp_dlines[i]);
 186                 }
 187         }
 188 }
 189
 190 static void
 191 rehash_txlines(struct Client *source_p)
 192 {
 193         struct ConfItem *aconf;
 194         dlink_node *ptr;
 195         dlink_node *next_ptr;
 196
 197         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 198                                 get_oper_name(source_p));
 199
 200         DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 201         {
 202                 aconf = ptr->data;
 203
 204                 if(!aconf->hold)
 205                         continue;
 206
 207                 free_conf(aconf);
 208                 dlinkDestroy(ptr, &xline_conf_list);
 209         }
 210 }
 211
 212 static void
 213 rehash_tresvs(struct Client *source_p)
 214 {
 215         struct ConfItem *aconf;
 216         dlink_node *ptr;
 217         dlink_node *next_ptr;
 218         int i;
 219
 220         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 221                                 get_oper_name(source_p));
 222
 223         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 224         {
 225                 aconf = ptr->data;
 226
 227                 if(!aconf->hold)
 228                         continue;
 229
 230                 free_conf(aconf);
 231                 dlinkDestroy(ptr, &resvTable[i]);
 232         }
 233         HASH_WALK_END
 234
 235         DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 236         {
 237                 aconf = ptr->data;
 238
 239                 if(!aconf->hold)
 240                         continue;
 241
 242                 free_conf(aconf);
 243                 dlinkDestroy(ptr, &resv_conf_list);
 244         }
 245 }
 246
 247 static void
 248 rehash_rejectcache(struct Client *source_p)
 249 {
 250         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 251                                 get_oper_name(source_p));
 252         flush_reject();
 253
 254 }
 255
 256 static void
 257 rehash_help(struct Client *source_p)
 258 {
 259         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 260                              "%s is forcing re-reading of HELP files",
 261                              get_oper_name(source_p));
 262         clear_help_hash();
 263         load_help();
 264 }
 265
 266 static void
 267 rehash_nickdelay(struct Client *source_p)
 268 {
 269         struct nd_entry *nd;
 270         dlink_node *ptr;
 271         dlink_node *safe_ptr;
 272
 273         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 274                              "%s is clearing the nick delay table",
 275                              get_oper_name(source_p));
 276
 277         DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 278         {
 279                 nd = ptr->data;
 280
 281                 free_nd_entry(nd);
 282         }
 283 }
 284
 285 /* *INDENT-OFF* */
 286 static struct hash_commands rehash_commands[] =
 287 {
 288         {"BANS",        rehash_bans_loc         },
 289         {"DNS",         rehash_dns              },
 290         {"MOTD",        rehash_motd             },
 291         {"OMOTD",       rehash_omotd            },
 292         {"GLINES",      rehash_glines           },
 293         {"PGLINES",     rehash_pglines          },
 294         {"TKLINES",     rehash_tklines          },
 295         {"TDLINES",     rehash_tdlines          },
 296         {"TXLINES",     rehash_txlines          },
 297         {"TRESVS",      rehash_tresvs           },
 298         {"REJECTCACHE", rehash_rejectcache      },
 299         {"HELP",        rehash_help             },
 300         {"NICKDELAY",   rehash_nickdelay        },
 301         {NULL,          NULL                    }
 302 };
 303 /* *INDENT-ON* */
 304
 305 static void
 306 do_rehash(struct Client *source_p, const char *type)
 307 {
 308         if (type != NULL)
 309         {
 310                 int x;
 311                 char cmdbuf[100];
 312
 313                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 314                      x++)
 315                 {
 316                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 317                         {
 318                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 319                                            source_p->name, rehash_commands[x].cmd);
 320                                 rehash_commands[x].handler(source_p);
 321                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 322                                      get_oper_name(source_p), source_p->sockhost);
 323                                 return;
 324                         }
 325                 }
 326
 327                 /* We are still here..we didn't match */
 328                 cmdbuf[0] = '\0';
 329                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 330                      x++)
 331                 {
 332                         strlcat(cmdbuf, " ", sizeof(cmdbuf));
 333                         strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 334                 }
 335                 sendto_one(source_p, ":%s NOTICE %s :rehash one of:%s", me.name, source_p->name,
 336                            cmdbuf);
 337         }
 338         else
 339         {
 340                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 341                            ConfigFileEntry.configfile);
 342                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 343                                      "%s is rehashing server config file", get_oper_name(source_p));
 344                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 345                      source_p->sockhost);
 346                 rehash(0);
 347         }
 348 }
 349
 350 /*
 351  * mo_rehash - REHASH message handler
 352  *
 353  * parv[1] = rehash type or destination
 354  * parv[2] = destination
 355  */
 356 static int
 357 mo_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 358 {
 359         const char *type = NULL, *target_server = NULL;
 360
 361         if(!IsOperRehash(source_p))
 362         {
 363                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 364                            me.name, source_p->name, "rehash");
 365                 return 0;
 366         }
 367
 368         if (parc > 2)
 369                 type = parv[1], target_server = parv[2];
 370         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 371                 type = NULL, target_server = parv[1];
 372         else if (parc > 1)
 373                 type = parv[1], target_server = NULL;
 374         else
 375                 type = NULL, target_server = NULL;
 376
 377         if (target_server != NULL)
 378         {
 379                 if(!IsOperRemoteBan(source_p))
 380                 {
 381                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 382                                 me.name, source_p->name, "remoteban");
 383                         return 0;
 384                 }
 385                 sendto_match_servs(source_p, target_server,
 386                                 CAP_ENCAP, NOCAPS,
 387                                 "ENCAP %s REHASH %s",
 388                                 target_server, type != NULL ? type : "");
 389                 if (match(target_server, me.name) == 0)
 390                         return 0;
 391         }
 392
 393         do_rehash(source_p, type);
 394
 395         return 0;
 396 }
 397
 398 static int
 399 me_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 400 {
 401
 402         if (!IsPerson(source_p))
 403                 return 0;
 404
 405         if (!find_shared_conf(source_p->username, source_p->host,
 406                                 source_p->user->server, SHARED_REHASH))
 407                 return 0;
 408
 409         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 410
 411         return 0;
 412 }