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         reload_nameservers();
  88 }
  89
  90 static void
  91 rehash_ssld(struct Client *source_p)
  92 {
  93         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is restarting ssld",
  94                                 get_oper_name(source_p));
  95
  96         restart_ssld();
  97 }
  98
  99 static void
 100 rehash_motd(struct Client *source_p)
 101 {
 102         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 103                              "%s is forcing re-reading of MOTD file",
 104                              get_oper_name(source_p));
 105         if (!MyConnect(source_p))
 106                 remote_rehash_oper_p = source_p;
 107
 108         cache_user_motd();
 109 }
 110
 111 static void
 112 rehash_omotd(struct Client *source_p)
 113 {
 114         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 115                              "%s is forcing re-reading of OPER MOTD file",
 116                              get_oper_name(source_p));
 117         if (!MyConnect(source_p))
 118                 remote_rehash_oper_p = source_p;
 119
 120         free_cachefile(oper_motd);
 121         oper_motd = cache_file(OPATH, "opers.motd", 0);
 122 }
 123
 124 static void
 125 rehash_tklines(struct Client *source_p)
 126 {
 127         struct ConfItem *aconf;
 128         rb_dlink_node *ptr, *next_ptr;
 129         int i;
 130
 131         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 132                                 get_oper_name(source_p));
 133         if (!MyConnect(source_p))
 134                 remote_rehash_oper_p = source_p;
 135
 136         for(i = 0; i < LAST_TEMP_TYPE; i++)
 137         {
 138                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 139                 {
 140                         aconf = ptr->data;
 141
 142                         delete_one_address_conf(aconf->host, aconf);
 143                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 144                 }
 145         }
 146 }
 147
 148 static void
 149 rehash_tdlines(struct Client *source_p)
 150 {
 151         struct ConfItem *aconf;
 152         rb_dlink_node *ptr, *next_ptr;
 153         int i;
 154
 155         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 156                                 get_oper_name(source_p));
 157         if (!MyConnect(source_p))
 158                 remote_rehash_oper_p = source_p;
 159
 160         for(i = 0; i < LAST_TEMP_TYPE; i++)
 161         {
 162                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 163                 {
 164                         aconf = ptr->data;
 165
 166                         delete_one_address_conf(aconf->host, aconf);
 167                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 168                 }
 169         }
 170 }
 171
 172 static void
 173 rehash_txlines(struct Client *source_p)
 174 {
 175         struct ConfItem *aconf;
 176         rb_dlink_node *ptr;
 177         rb_dlink_node *next_ptr;
 178
 179         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 180                                 get_oper_name(source_p));
 181         if (!MyConnect(source_p))
 182                 remote_rehash_oper_p = source_p;
 183
 184         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 185         {
 186                 aconf = ptr->data;
 187
 188                 if(!aconf->hold || aconf->lifetime)
 189                         continue;
 190
 191                 free_conf(aconf);
 192                 rb_dlinkDestroy(ptr, &xline_conf_list);
 193         }
 194 }
 195
 196 static void
 197 rehash_tresvs(struct Client *source_p)
 198 {
 199         struct ConfItem *aconf;
 200         struct rb_radixtree_iteration_state iter;
 201         rb_dlink_node *ptr;
 202         rb_dlink_node *next_ptr;
 203         int i;
 204
 205         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 206                                 get_oper_name(source_p));
 207         if (!MyConnect(source_p))
 208                 remote_rehash_oper_p = source_p;
 209
 210         RB_RADIXTREE_FOREACH(aconf, &iter, resv_tree)
 211         {
 212                 if(!aconf->hold || aconf->lifetime)
 213                         continue;
 214
 215                 rb_radixtree_delete(resv_tree, aconf->host);
 216                 free_conf(aconf);
 217         }
 218
 219         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 220         {
 221                 aconf = ptr->data;
 222
 223                 if(!aconf->hold || aconf->lifetime)
 224                         continue;
 225
 226                 free_conf(aconf);
 227                 rb_dlinkDestroy(ptr, &resv_conf_list);
 228         }
 229 }
 230
 231 static void
 232 rehash_rejectcache(struct Client *source_p)
 233 {
 234         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 235                                 get_oper_name(source_p));
 236         if (!MyConnect(source_p))
 237                 remote_rehash_oper_p = source_p;
 238         flush_reject();
 239
 240 }
 241
 242 static void
 243 rehash_throttles(struct Client *source_p)
 244 {
 245         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing throttles",
 246                                 get_oper_name(source_p));
 247         if (!MyConnect(source_p))
 248                 remote_rehash_oper_p = source_p;
 249         flush_throttle();
 250
 251 }
 252
 253 static void
 254 rehash_help(struct Client *source_p)
 255 {
 256         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 257                              "%s is forcing re-reading of HELP files",
 258                              get_oper_name(source_p));
 259         if (!MyConnect(source_p))
 260                 remote_rehash_oper_p = source_p;
 261         load_help();
 262 }
 263
 264 static void
 265 rehash_nickdelay(struct Client *source_p)
 266 {
 267         struct nd_entry *nd;
 268         rb_dlink_node *ptr;
 269         rb_dlink_node *safe_ptr;
 270
 271         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 272                              "%s is clearing the nick delay table",
 273                              get_oper_name(source_p));
 274         if (!MyConnect(source_p))
 275                 remote_rehash_oper_p = source_p;
 276
 277         RB_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         {"SSLD",        rehash_ssld             },
 291         {"MOTD",        rehash_motd             },
 292         {"OMOTD",       rehash_omotd            },
 293         {"TKLINES",     rehash_tklines          },
 294         {"TDLINES",     rehash_tdlines          },
 295         {"TXLINES",     rehash_txlines          },
 296         {"TRESVS",      rehash_tresvs           },
 297         {"REJECTCACHE", rehash_rejectcache      },
 298         {"THROTTLES",   rehash_throttles        },
 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                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 321                                      get_oper_name(source_p), source_p->sockhost);
 322                                 rehash_commands[x].handler(source_p);
 323                                 remote_rehash_oper_p = NULL;
 324                                 return;
 325                         }
 326                 }
 327
 328                 /* We are still here..we didn't match */
 329                 cmdbuf[0] = '\0';
 330                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 331                      x++)
 332                 {
 333                         rb_strlcat(cmdbuf, " ", sizeof(cmdbuf));
 334                         rb_strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 335                 }
 336                 sendto_one_notice(source_p, ":rehash one of:%s", 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                 if (!MyConnect(source_p))
 345                         remote_rehash_oper_p = source_p;
 346                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 347                      source_p->sockhost);
 348                 rehash(0);
 349                 remote_rehash_oper_p = NULL;
 350         }
 351 }
 352
 353 /*
 354  * mo_rehash - REHASH message handler
 355  *
 356  * parv[1] = rehash type or destination
 357  * parv[2] = destination
 358  */
 359 static void
 360 mo_rehash(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 361 {
 362         const char *type = NULL, *target_server = NULL;
 363
 364         if(!IsOperRehash(source_p))
 365         {
 366                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 367                            me.name, source_p->name, "rehash");
 368                 return;
 369         }
 370
 371         if (parc > 2)
 372                 type = parv[1], target_server = parv[2];
 373         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 374                 type = NULL, target_server = parv[1];
 375         else if (parc > 1)
 376                 type = parv[1], target_server = NULL;
 377         else
 378                 type = NULL, target_server = NULL;
 379
 380         if (target_server != NULL)
 381         {
 382                 if(!IsOperRemoteBan(source_p))
 383                 {
 384                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 385                                 me.name, source_p->name, "remoteban");
 386                         return;
 387                 }
 388                 sendto_match_servs(source_p, target_server,
 389                                 CAP_ENCAP, NOCAPS,
 390                                 "ENCAP %s REHASH %s",
 391                                 target_server, type != NULL ? type : "");
 392                 if (match(target_server, me.name) == 0)
 393                         return;
 394         }
 395
 396         do_rehash(source_p, type);
 397 }
 398
 399 static void
 400 me_rehash(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 401 {
 402
 403         if (!IsPerson(source_p))
 404                 return;
 405
 406         if (!find_shared_conf(source_p->username, source_p->host,
 407                                 source_p->servptr->name, SHARED_REHASH))
 408                 return;
 409
 410         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 411 }