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 "irc_radixtree.h"
  45 #include "sslproc.h"
  46
  47 static int mo_rehash(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  48 static int me_rehash(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  49
  50 struct Message rehash_msgtab = {
  51         "REHASH", 0, 0, 0, 0,
  52         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_rehash, 0}, {mo_rehash, 0}}
  53 };
  54
  55 mapi_clist_av1 rehash_clist[] = { &rehash_msgtab, NULL };
  56 DECLARE_MODULE_AV1(rehash, NULL, NULL, rehash_clist, NULL, NULL, "$Revision: 3161 $");
  57
  58 struct hash_commands
  59 {
  60         const char *cmd;
  61         void (*handler) (struct Client * source_p);
  62 };
  63
  64 static void
  65 rehash_bans_loc(struct Client *source_p)
  66 {
  67         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing bans",
  68                                 get_oper_name(source_p));
  69         if (!MyConnect(source_p))
  70                 remote_rehash_oper_p = 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         if (!MyConnect(source_p))
  81                 remote_rehash_oper_p = source_p;
  82
  83         /* reread /etc/resolv.conf and reopen res socket */
  84         restart_authd();
  85 }
  86
  87 static void
  88 rehash_ssld(struct Client *source_p)
  89 {
  90         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is restarting ssld",
  91                                 get_oper_name(source_p));
  92
  93         restart_ssld();
  94 }
  95
  96 static void
  97 rehash_motd(struct Client *source_p)
  98 {
  99         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 100                              "%s is forcing re-reading of MOTD file",
 101                              get_oper_name(source_p));
 102         if (!MyConnect(source_p))
 103                 remote_rehash_oper_p = source_p;
 104
 105         cache_user_motd();
 106 }
 107
 108 static void
 109 rehash_omotd(struct Client *source_p)
 110 {
 111         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 112                              "%s is forcing re-reading of OPER MOTD file",
 113                              get_oper_name(source_p));
 114         if (!MyConnect(source_p))
 115                 remote_rehash_oper_p = source_p;
 116
 117         free_cachefile(oper_motd);
 118         oper_motd = cache_file(OPATH, "opers.motd", 0);
 119 }
 120
 121 static void
 122 rehash_tklines(struct Client *source_p)
 123 {
 124         struct ConfItem *aconf;
 125         rb_dlink_node *ptr, *next_ptr;
 126         int i;
 127
 128         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 129                                 get_oper_name(source_p));
 130         if (!MyConnect(source_p))
 131                 remote_rehash_oper_p = source_p;
 132
 133         for(i = 0; i < LAST_TEMP_TYPE; i++)
 134         {
 135                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 136                 {
 137                         aconf = ptr->data;
 138
 139                         delete_one_address_conf(aconf->host, aconf);
 140                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 141                 }
 142         }
 143 }
 144
 145 static void
 146 rehash_tdlines(struct Client *source_p)
 147 {
 148         struct ConfItem *aconf;
 149         rb_dlink_node *ptr, *next_ptr;
 150         int i;
 151
 152         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 153                                 get_oper_name(source_p));
 154         if (!MyConnect(source_p))
 155                 remote_rehash_oper_p = source_p;
 156
 157         for(i = 0; i < LAST_TEMP_TYPE; i++)
 158         {
 159                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 160                 {
 161                         aconf = ptr->data;
 162
 163                         delete_one_address_conf(aconf->host, aconf);
 164                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 165                 }
 166         }
 167 }
 168
 169 static void
 170 rehash_txlines(struct Client *source_p)
 171 {
 172         struct ConfItem *aconf;
 173         rb_dlink_node *ptr;
 174         rb_dlink_node *next_ptr;
 175
 176         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 177                                 get_oper_name(source_p));
 178         if (!MyConnect(source_p))
 179                 remote_rehash_oper_p = source_p;
 180
 181         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 182         {
 183                 aconf = ptr->data;
 184
 185                 if(!aconf->hold || aconf->lifetime)
 186                         continue;
 187
 188                 free_conf(aconf);
 189                 rb_dlinkDestroy(ptr, &xline_conf_list);
 190         }
 191 }
 192
 193 static void
 194 rehash_tresvs(struct Client *source_p)
 195 {
 196         struct ConfItem *aconf;
 197         struct irc_radixtree_iteration_state iter;
 198         rb_dlink_node *ptr;
 199         rb_dlink_node *next_ptr;
 200         int i;
 201
 202         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 203                                 get_oper_name(source_p));
 204         if (!MyConnect(source_p))
 205                 remote_rehash_oper_p = source_p;
 206
 207         IRC_RADIXTREE_FOREACH(aconf, &iter, resv_tree)
 208         {
 209                 if(!aconf->hold || aconf->lifetime)
 210                         continue;
 211
 212                 irc_radixtree_delete(resv_tree, aconf->host);
 213                 free_conf(aconf);
 214         }
 215
 216         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 217         {
 218                 aconf = ptr->data;
 219
 220                 if(!aconf->hold || aconf->lifetime)
 221                         continue;
 222
 223                 free_conf(aconf);
 224                 rb_dlinkDestroy(ptr, &resv_conf_list);
 225         }
 226 }
 227
 228 static void
 229 rehash_rejectcache(struct Client *source_p)
 230 {
 231         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 232                                 get_oper_name(source_p));
 233         if (!MyConnect(source_p))
 234                 remote_rehash_oper_p = source_p;
 235         flush_reject();
 236
 237 }
 238
 239 static void
 240 rehash_throttles(struct Client *source_p)
 241 {
 242         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing throttles",
 243                                 get_oper_name(source_p));
 244         if (!MyConnect(source_p))
 245                 remote_rehash_oper_p = source_p;
 246         flush_throttle();
 247
 248 }
 249
 250 static void
 251 rehash_help(struct Client *source_p)
 252 {
 253         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 254                              "%s is forcing re-reading of HELP files",
 255                              get_oper_name(source_p));
 256         if (!MyConnect(source_p))
 257                 remote_rehash_oper_p = source_p;
 258         load_help();
 259 }
 260
 261 static void
 262 rehash_nickdelay(struct Client *source_p)
 263 {
 264         struct nd_entry *nd;
 265         rb_dlink_node *ptr;
 266         rb_dlink_node *safe_ptr;
 267
 268         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 269                              "%s is clearing the nick delay table",
 270                              get_oper_name(source_p));
 271         if (!MyConnect(source_p))
 272                 remote_rehash_oper_p = source_p;
 273
 274         RB_DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 275         {
 276                 nd = ptr->data;
 277
 278                 free_nd_entry(nd);
 279         }
 280 }
 281
 282 /* *INDENT-OFF* */
 283 static struct hash_commands rehash_commands[] =
 284 {
 285         {"BANS",        rehash_bans_loc         },
 286         {"DNS",         rehash_dns              },
 287         {"SSLD",        rehash_ssld             },
 288         {"MOTD",        rehash_motd             },
 289         {"OMOTD",       rehash_omotd            },
 290         {"TKLINES",     rehash_tklines          },
 291         {"TDLINES",     rehash_tdlines          },
 292         {"TXLINES",     rehash_txlines          },
 293         {"TRESVS",      rehash_tresvs           },
 294         {"REJECTCACHE", rehash_rejectcache      },
 295         {"THROTTLES",   rehash_throttles        },
 296         {"HELP",        rehash_help             },
 297         {"NICKDELAY",   rehash_nickdelay        },
 298         {NULL,          NULL                    }
 299 };
 300 /* *INDENT-ON* */
 301
 302 static void
 303 do_rehash(struct Client *source_p, const char *type)
 304 {
 305         if (type != NULL)
 306         {
 307                 int x;
 308                 char cmdbuf[100];
 309
 310                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 311                      x++)
 312                 {
 313                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 314                         {
 315                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 316                                            source_p->name, rehash_commands[x].cmd);
 317                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 318                                      get_oper_name(source_p), source_p->sockhost);
 319                                 rehash_commands[x].handler(source_p);
 320                                 remote_rehash_oper_p = NULL;
 321                                 return;
 322                         }
 323                 }
 324
 325                 /* We are still here..we didn't match */
 326                 cmdbuf[0] = '\0';
 327                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 328                      x++)
 329                 {
 330                         rb_strlcat(cmdbuf, " ", sizeof(cmdbuf));
 331                         rb_strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 332                 }
 333                 sendto_one_notice(source_p, ":rehash one of:%s", cmdbuf);
 334         }
 335         else
 336         {
 337                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 338                            ConfigFileEntry.configfile);
 339                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 340                                      "%s is rehashing server config file", get_oper_name(source_p));
 341                 if (!MyConnect(source_p))
 342                         remote_rehash_oper_p = source_p;
 343                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 344                      source_p->sockhost);
 345                 rehash(0);
 346                 remote_rehash_oper_p = NULL;
 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 MsgBuf *msgbuf_p, 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 MsgBuf *msgbuf_p, 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->servptr->name, SHARED_REHASH))
 407                 return 0;
 408
 409         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 410
 411         return 0;
 412 }