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