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  *  $Id: m_rehash.c 3161 2007-01-25 07:23:01Z nenolod $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "channel.h"
  30 #include "common.h"
  31 #include "irc_string.h"
  32 #include "ircd.h"
  33 #include "s_serv.h"
  34 #include "numeric.h"
  35 #include "res.h"
  36 #include "s_conf.h"
  37 #include "s_newconf.h"
  38 #include "logger.h"
  39 #include "send.h"
  40 #include "msg.h"
  41 #include "parse.h"
  42 #include "modules.h"
  43 #include "hostmask.h"
  44 #include "reject.h"
  45 #include "hash.h"
  46 #include "cache.h"
  47
  48 static int mo_rehash(struct Client *, struct Client *, int, const char **);
  49 static int me_rehash(struct Client *, struct Client *, int, const char **);
  50
  51 struct Message rehash_msgtab = {
  52         "REHASH", 0, 0, 0, MFLG_SLOW,
  53         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_rehash, 0}, {mo_rehash, 0}}
  54 };
  55
  56 mapi_clist_av1 rehash_clist[] = { &rehash_msgtab, NULL };
  57 DECLARE_MODULE_AV1(rehash, NULL, NULL, rehash_clist, NULL, NULL, "$Revision: 3161 $");
  58
  59 struct hash_commands
  60 {
  61         const char *cmd;
  62         void (*handler) (struct Client * source_p);
  63 };
  64
  65 static void
  66 rehash_bans_loc(struct Client *source_p)
  67 {
  68         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing bans",
  69                                 get_oper_name(source_p));
  70
  71         rehash_bans(0);
  72 }
  73
  74 static void
  75 rehash_dns(struct Client *source_p)
  76 {
  77         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is rehashing DNS",
  78                              get_oper_name(source_p));
  79
  80         /* reread /etc/resolv.conf and reopen res socket */
  81         restart_resolver();
  82 }
  83
  84 static void
  85 rehash_motd(struct Client *source_p)
  86 {
  87         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  88                              "%s is forcing re-reading of MOTD file",
  89                              get_oper_name(source_p));
  90
  91         free_cachefile(user_motd);
  92         user_motd = cache_file(MPATH, "ircd.motd", 0);
  93 }
  94
  95 static void
  96 rehash_omotd(struct Client *source_p)
  97 {
  98         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  99                              "%s is forcing re-reading of OPER MOTD file",
 100                              get_oper_name(source_p));
 101
 102         free_cachefile(oper_motd);
 103         oper_motd = cache_file(OPATH, "opers.motd", 0);
 104 }
 105
 106 static void
 107 rehash_tklines(struct Client *source_p)
 108 {
 109         struct ConfItem *aconf;
 110         rb_dlink_node *ptr, *next_ptr;
 111         int i;
 112
 113         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp klines",
 114                                 get_oper_name(source_p));
 115
 116         for(i = 0; i < LAST_TEMP_TYPE; i++)
 117         {
 118                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_klines[i].head)
 119                 {
 120                         aconf = ptr->data;
 121
 122                         delete_one_address_conf(aconf->host, aconf);
 123                         rb_dlinkDestroy(ptr, &temp_klines[i]);
 124                 }
 125         }
 126 }
 127
 128 static void
 129 rehash_tdlines(struct Client *source_p)
 130 {
 131         struct ConfItem *aconf;
 132         rb_dlink_node *ptr, *next_ptr;
 133         int i;
 134
 135         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp dlines",
 136                                 get_oper_name(source_p));
 137
 138         for(i = 0; i < LAST_TEMP_TYPE; i++)
 139         {
 140                 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, temp_dlines[i].head)
 141                 {
 142                         aconf = ptr->data;
 143
 144                         delete_one_address_conf(aconf->host, aconf);
 145                         rb_dlinkDestroy(ptr, &temp_dlines[i]);
 146                 }
 147         }
 148 }
 149
 150 static void
 151 rehash_txlines(struct Client *source_p)
 152 {
 153         struct ConfItem *aconf;
 154         rb_dlink_node *ptr;
 155         rb_dlink_node *next_ptr;
 156
 157         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp xlines",
 158                                 get_oper_name(source_p));
 159
 160         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 161         {
 162                 aconf = ptr->data;
 163
 164                 if(!aconf->hold)
 165                         continue;
 166
 167                 free_conf(aconf);
 168                 rb_dlinkDestroy(ptr, &xline_conf_list);
 169         }
 170 }
 171
 172 static void
 173 rehash_tresvs(struct Client *source_p)
 174 {
 175         struct ConfItem *aconf;
 176         rb_dlink_node *ptr;
 177         rb_dlink_node *next_ptr;
 178         int i;
 179
 180         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing temp resvs",
 181                                 get_oper_name(source_p));
 182
 183         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 184         {
 185                 aconf = ptr->data;
 186
 187                 if(!aconf->hold)
 188                         continue;
 189
 190                 free_conf(aconf);
 191                 rb_dlinkDestroy(ptr, &resvTable[i]);
 192         }
 193         HASH_WALK_END
 194
 195         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 196         {
 197                 aconf = ptr->data;
 198
 199                 if(!aconf->hold)
 200                         continue;
 201
 202                 free_conf(aconf);
 203                 rb_dlinkDestroy(ptr, &resv_conf_list);
 204         }
 205 }
 206
 207 static void
 208 rehash_rejectcache(struct Client *source_p)
 209 {
 210         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s is clearing reject cache",
 211                                 get_oper_name(source_p));
 212         flush_reject();
 213
 214 }
 215
 216 static void
 217 rehash_help(struct Client *source_p)
 218 {
 219         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 220                              "%s is forcing re-reading of HELP files",
 221                              get_oper_name(source_p));
 222         load_help();
 223 }
 224
 225 static void
 226 rehash_nickdelay(struct Client *source_p)
 227 {
 228         struct nd_entry *nd;
 229         rb_dlink_node *ptr;
 230         rb_dlink_node *safe_ptr;
 231
 232         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 233                              "%s is clearing the nick delay table",
 234                              get_oper_name(source_p));
 235
 236         RB_DLINK_FOREACH_SAFE(ptr, safe_ptr, nd_list.head)
 237         {
 238                 nd = ptr->data;
 239
 240                 free_nd_entry(nd);
 241         }
 242 }
 243
 244 /* *INDENT-OFF* */
 245 static struct hash_commands rehash_commands[] =
 246 {
 247         {"BANS",        rehash_bans_loc         },
 248         {"DNS",         rehash_dns              },
 249         {"MOTD",        rehash_motd             },
 250         {"OMOTD",       rehash_omotd            },
 251         {"TKLINES",     rehash_tklines          },
 252         {"TDLINES",     rehash_tdlines          },
 253         {"TXLINES",     rehash_txlines          },
 254         {"TRESVS",      rehash_tresvs           },
 255         {"REJECTCACHE", rehash_rejectcache      },
 256         {"HELP",        rehash_help             },
 257         {"NICKDELAY",   rehash_nickdelay        },
 258         {NULL,          NULL                    }
 259 };
 260 /* *INDENT-ON* */
 261
 262 static void
 263 do_rehash(struct Client *source_p, const char *type)
 264 {
 265         if (type != NULL)
 266         {
 267                 int x;
 268                 char cmdbuf[100];
 269
 270                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 271                      x++)
 272                 {
 273                         if(irccmp(type, rehash_commands[x].cmd) == 0)
 274                         {
 275                                 sendto_one(source_p, form_str(RPL_REHASHING), me.name,
 276                                            source_p->name, rehash_commands[x].cmd);
 277                                 rehash_commands[x].handler(source_p);
 278                                 ilog(L_MAIN, "REHASH %s From %s[%s]", type,
 279                                      get_oper_name(source_p), source_p->sockhost);
 280                                 return;
 281                         }
 282                 }
 283
 284                 /* We are still here..we didn't match */
 285                 cmdbuf[0] = '\0';
 286                 for (x = 0; rehash_commands[x].cmd != NULL && rehash_commands[x].handler != NULL;
 287                      x++)
 288                 {
 289                         strlcat(cmdbuf, " ", sizeof(cmdbuf));
 290                         strlcat(cmdbuf, rehash_commands[x].cmd, sizeof(cmdbuf));
 291                 }
 292                 sendto_one_notice(source_p, ":rehash one of:%s", cmdbuf);
 293         }
 294         else
 295         {
 296                 sendto_one(source_p, form_str(RPL_REHASHING), me.name, source_p->name,
 297                            ConfigFileEntry.configfile);
 298                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 299                                      "%s is rehashing server config file", get_oper_name(source_p));
 300                 ilog(L_MAIN, "REHASH From %s[%s]", get_oper_name(source_p),
 301                      source_p->sockhost);
 302                 rehash(0);
 303         }
 304 }
 305
 306 /*
 307  * mo_rehash - REHASH message handler
 308  *
 309  * parv[1] = rehash type or destination
 310  * parv[2] = destination
 311  */
 312 static int
 313 mo_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 314 {
 315         const char *type = NULL, *target_server = NULL;
 316
 317         if(!IsOperRehash(source_p))
 318         {
 319                 sendto_one(source_p, form_str(ERR_NOPRIVS),
 320                            me.name, source_p->name, "rehash");
 321                 return 0;
 322         }
 323
 324         if (parc > 2)
 325                 type = parv[1], target_server = parv[2];
 326         else if (parc > 1 && (strchr(parv[1], '.') || strchr(parv[1], '?') || strchr(parv[1], '*')))
 327                 type = NULL, target_server = parv[1];
 328         else if (parc > 1)
 329                 type = parv[1], target_server = NULL;
 330         else
 331                 type = NULL, target_server = NULL;
 332
 333         if (target_server != NULL)
 334         {
 335                 if(!IsOperRemoteBan(source_p))
 336                 {
 337                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 338                                 me.name, source_p->name, "remoteban");
 339                         return 0;
 340                 }
 341                 sendto_match_servs(source_p, target_server,
 342                                 CAP_ENCAP, NOCAPS,
 343                                 "ENCAP %s REHASH %s",
 344                                 target_server, type != NULL ? type : "");
 345                 if (match(target_server, me.name) == 0)
 346                         return 0;
 347         }
 348
 349         do_rehash(source_p, type);
 350
 351         return 0;
 352 }
 353
 354 static int
 355 me_rehash(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 356 {
 357
 358         if (!IsPerson(source_p))
 359                 return 0;
 360
 361         if (!find_shared_conf(source_p->username, source_p->host,
 362                                 source_p->servptr->name, SHARED_REHASH))
 363                 return 0;
 364
 365         do_rehash(source_p, parc > 1 ? parv[1] : NULL);
 366
 367         return 0;
 368 }