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