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 #include "stdinc.h"
  26 #include "client.h"
  27 #include "channel.h"
  28 #include "common.h"
  29 #include "match.h"
  30 #include "ircd.h"
  31 #include "s_serv.h"
  32 #include "numeric.h"
  33 #include "s_conf.h"
  34 #include "s_newconf.h"
  35 #include "logger.h"
  36 #include "send.h"
  37 #include "msg.h"
  38 #include "parse.h"
  39 #include "modules.h"
  40 #include "hostmask.h"
  41 #include "reject.h"
  42 #include "hash.h"
  43 #include "cache.h"
  44 #include "rb_radixtree.h"
  45 #include "sslproc.h"
  46
  47 static const char rehash_desc[] =
  48         "Provides the REHASH command to reload configuration and other files";
  49
  50 static void mo_rehash(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  51 static void me_rehash(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  52
  53 struct Message rehash_msgtab = {
  54         "REHASH", 0, 0, 0, 0,
  55         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_rehash, 0}, {mo_rehash, 0}}
  56 };
  57
  58 mapi_clist_av1 rehash_clist[] = { &rehash_msgtab, NULL };
  59
  60 DECLARE_MODULE_AV2(rehash, NULL, NULL, rehash_clist, NULL, NULL, NULL, NULL, rehash_desc);
  61
  62 struct hash_commands
  63 {
  64         const char *cmd;
  65         void (*handler) (struct Client * source_p);
  66 };
  67
  68 static void
  69 rehash_bans_loc(struct Client *source_p)
  70 {
  71         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing bans",
  72                                 get_oper_name(source_p));
  73         if (!MyConnect(source_p))
  74                 remote_rehash_oper_p = source_p;
  75
  76         rehash_bans(0);
  77 }
  78
  79 static void
  80 rehash_dns(struct Client *source_p)
  81 {
  82         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing DNS",
  83                              get_oper_name(source_p));
  84         if (!MyConnect(source_p))
  85                 remote_rehash_oper_p = source_p;
  86
  87         /* reread /etc/resolv.conf and reopen res socket */
  88         restart_authd();
  89 }
  90
  91 static void
  92 rehash_ssld(struct Client *source_p)
  93 {
  94         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is restarting ssld",
  95                                 get_oper_name(source_p));
  96
  97         restart_ssld();
  98 }
  99
 100 static void
 101 rehash_motd(struct Client *source_p)
 102 {
 103         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 104                              "%s is forcing re-reading of MOTD file",
 105                              get_oper_name(source_p));
 106         if (!MyConnect(source_p))
 107                 remote_rehash_oper_p = source_p;
 108
 109         cache_user_motd();
 110 }
 111
 112 static void
 113 rehash_omotd(struct Client *source_p)
 114 {
 115         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 116                              "%s is forcing re-reading of OPER MOTD file",
 117                              get_oper_name(source_p));
 118         if (!MyConnect(source_p))
 119                 remote_rehash_oper_p = source_p;
 120
 121         free_cachefile(oper_motd);
 122         oper_motd = cache_file(OPATH, "opers.motd", 0);
 123 }
 124
 125 static void
 126 rehash_tklines(struct Client *source_p)
 127 {
 128         struct ConfItem *aconf;
 129         rb_dlink_node *ptr, *next_ptr;
 130         int i;
 131
 132         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 133                                 get_oper_name(source_p));
 134         if (!MyConnect(source_p))
 135                 remote_rehash_oper_p = source_p;
 136
 137         for(i = 0; i < LAST_TEMP_TYPE; i++)
 138         {
 139                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 140                 {
 141                         aconf = ptr->data;
 142
 143                         delete_one_address_conf(aconf->host, aconf);
 144                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 145                 }
 146         }
 147 }
 148
 149 static void
 150 rehash_tdlines(struct Client *source_p)
 151 {
 152         struct ConfItem *aconf;
 153         rb_dlink_node *ptr, *next_ptr;
 154         int i;
 155
 156         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 157                                 get_oper_name(source_p));
 158         if (!MyConnect(source_p))
 159                 remote_rehash_oper_p = source_p;
 160
 161         for(i = 0; i < LAST_TEMP_TYPE; i++)
 162         {
 163                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 164                 {
 165                         aconf = ptr->data;
 166
 167                         delete_one_address_conf(aconf->host, aconf);
 168                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 169                 }
 170         }
 171 }
 172
 173 static void
 174 rehash_txlines(struct Client *source_p)
 175 {
 176         struct ConfItem *aconf;
 177         rb_dlink_node *ptr;
 178         rb_dlink_node *next_ptr;
 179
 180         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 181                                 get_oper_name(source_p));
 182         if (!MyConnect(source_p))
 183                 remote_rehash_oper_p = source_p;
 184
 185         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 186         {
 187                 aconf = ptr->data;
 188
 189                 if(!aconf->hold || aconf->lifetime)
 190                         continue;
 191
 192                 free_conf(aconf);
 193                 rb_dlinkDestroy(ptr, &xline_conf_list);
 194         }
 195 }
 196
 197 static void
 198 rehash_tresvs(struct Client *source_p)
 199 {
 200         struct ConfItem *aconf;
 201         struct rb_radixtree_iteration_state iter;
 202         rb_dlink_node *ptr;
 203         rb_dlink_node *next_ptr;
 204         int i;
 205
 206         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 207                                 get_oper_name(source_p));
 208         if (!MyConnect(source_p))
 209                 remote_rehash_oper_p = source_p;
 210
 211         RB_RADIXTREE_FOREACH(aconf, &iter, resv_tree)
 212         {
 213                 if(!aconf->hold || aconf->lifetime)
 214                         continue;
 215
 216                 rb_radixtree_delete(resv_tree, aconf->host);
 217                 free_conf(aconf);
 218         }
 219
 220         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 221         {
 222                 aconf = ptr->data;
 223
 224                 if(!aconf->hold || aconf->lifetime)
 225                         continue;
 226
 227                 free_conf(aconf);
 228                 rb_dlinkDestroy(ptr, &resv_conf_list);
 229         }
 230 }
 231
 232 static void
 233 rehash_rejectcache(struct Client *source_p)
 234 {
 235         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 236                                 get_oper_name(source_p));
 237         if (!MyConnect(source_p))
 238                 remote_rehash_oper_p = source_p;
 239         flush_reject();
 240
 241 }
 242
 243 static void
 244 rehash_throttles(struct Client *source_p)
 245 {
 246         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing throttles",
 247                                 get_oper_name(source_p));
 248         if (!MyConnect(source_p))
 249                 remote_rehash_oper_p = source_p;
 250         flush_throttle();
 251
 252 }
 253
 254 static void
 255 rehash_help(struct Client *source_p)
 256 {
 257         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 258                              "%s is forcing re-reading of HELP files",
 259                              get_oper_name(source_p));
 260         if (!MyConnect(source_p))
 261                 remote_rehash_oper_p = source_p;
 262         load_help();
 263 }
 264
 265 static void
 266 rehash_nickdelay(struct Client *source_p)
 267 {
 268         struct nd_entry *nd;
 269         rb_dlink_node *ptr;
 270         rb_dlink_node *safe_ptr;
 271
 272         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 273                              "%s is clearing the nick delay table",
 274                              get_oper_name(source_p));
 275         if (!MyConnect(source_p))
 276                 remote_rehash_oper_p = source_p;
 277
 278         RB_DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 279         {
 280                 nd = ptr->data;
 281
 282                 free_nd_entry(nd);
 283         }
 284 }
 285
 286 /* *INDENT-OFF* */
 287 static struct hash_commands rehash_commands[] =
 288 {
 289         {"BANS",        rehash_bans_loc         },
 290         {"DNS",         rehash_dns              },
 291         {"SSLD",        rehash_ssld             },
 292         {"MOTD",        rehash_motd             },
 293         {"OMOTD",       rehash_omotd            },
 294         {"TKLINES",     rehash_tklines          },
 295         {"TDLINES",     rehash_tdlines          },
 296         {"TXLINES",     rehash_txlines          },
 297         {"TRESVS",      rehash_tresvs           },
 298         {"REJECTCACHE", rehash_rejectcache      },
 299         {"THROTTLES",   rehash_throttles        },
 300         {"HELP",        rehash_help             },
 301         {"NICKDELAY",   rehash_nickdelay        },
 302         {NULL,          NULL                    }
 303 };
 304 /* *INDENT-ON* */
 305
 306 static void
 307 do_rehash(struct Client *source_p, const char *type)
 308 {
 309         if (type != NULL)
 310         {
 311                 int x;
 312                 char cmdbuf[100];
 313
 314                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 315                      x++)
 316                 {
 317                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 318                         {
 319                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 320                                            source_p->name, rehash_commands[x].cmd);
 321                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 322                                      get_oper_name(source_p), source_p->sockhost);
 323                                 rehash_commands[x].handler(source_p);
 324                                 remote_rehash_oper_p = NULL;
 325                                 return;
 326                         }
 327                 }
 328
 329                 /* We are still here..we didn't match */
 330                 cmdbuf[0] = '\0';
 331                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 332                      x++)
 333                 {
 334                         rb_strlcat(cmdbuf, " ", sizeof(cmdbuf));
 335                         rb_strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 336                 }
 337                 sendto_one_notice(source_p, ":rehash one of:%s", cmdbuf);
 338         }
 339         else
 340         {
 341                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 342                            ConfigFileEntry.configfile);
 343                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 344                                      "%s is rehashing server config file", get_oper_name(source_p));
 345                 if (!MyConnect(source_p))
 346                         remote_rehash_oper_p = source_p;
 347                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 348                      source_p->sockhost);
 349                 rehash(0);
 350                 remote_rehash_oper_p = NULL;
 351         }
 352 }
 353
 354 /*
 355  * mo_rehash - REHASH message handler
 356  *
 357  * parv[1] = rehash type or destination
 358  * parv[2] = destination
 359  */
 360 static void
 361 mo_rehash(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 362 {
 363         const char *type = NULL, *target_server = NULL;
 364
 365         if(!IsOperRehash(source_p))
 366         {
 367                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 368                            me.name, source_p->name, "rehash");
 369                 return;
 370         }
 371
 372         if (parc > 2)
 373                 type = parv[1], target_server = parv[2];
 374         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 375                 type = NULL, target_server = parv[1];
 376         else if (parc > 1)
 377                 type = parv[1], target_server = NULL;
 378         else
 379                 type = NULL, target_server = NULL;
 380
 381         if (target_server != NULL)
 382         {
 383                 if(!IsOperRemoteBan(source_p))
 384                 {
 385                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 386                                 me.name, source_p->name, "remoteban");
 387                         return;
 388                 }
 389                 sendto_match_servs(source_p, target_server,
 390                                 CAP_ENCAP, NOCAPS,
 391                                 "ENCAP %s REHASH %s",
 392                                 target_server, type != NULL ? type : "");
 393                 if (match(target_server, me.name) == 0)
 394                         return;
 395         }
 396
 397         do_rehash(source_p, type);
 398 }
 399
 400 static void
 401 me_rehash(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 402 {
 403
 404         if (!IsPerson(source_p))
 405                 return;
 406
 407         if (!find_shared_conf(source_p->username, source_p->host,
 408                                 source_p->servptr->name, SHARED_REHASH))
 409                 return;
 410
 411         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 412 }