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