contrib/bind-9.3/bin/named/include/named/server.h

   1 /*
   2  * Copyright (C) 2004, 2006  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: server.h,v 1.58.2.1.10.13 2006/03/02 00:37:20 marka Exp $ */
  19
  20 #ifndef NAMED_SERVER_H
  21 #define NAMED_SERVER_H 1
  22
  23 #include <isc/log.h>
  24 #include <isc/sockaddr.h>
  25 #include <isc/magic.h>
  26 #include <isc/types.h>
  27 #include <isc/quota.h>
  28
  29 #include <dns/types.h>
  30 #include <dns/acl.h>
  31
  32 #include <named/types.h>
  33
  34 #define NS_EVENTCLASS           ISC_EVENTCLASS(0x4E43)
  35 #define NS_EVENT_RELOAD         (NS_EVENTCLASS + 0)
  36 #define NS_EVENT_CLIENTCONTROL  (NS_EVENTCLASS + 1)
  37
  38 /*
  39  * Name server state.  Better here than in lots of separate global variables.
  40  */
  41 struct ns_server {
  42         unsigned int            magic;
  43         isc_mem_t *             mctx;
  44
  45         isc_task_t *            task;
  46
  47         /* Configurable data. */
  48         isc_quota_t             xfroutquota;
  49         isc_quota_t             tcpquota;
  50         isc_quota_t             recursionquota;
  51         dns_acl_t               *blackholeacl;
  52         char *                  statsfile;      /* Statistics file name */
  53         char *                  dumpfile;       /* Dump file name */
  54         char *                  recfile;        /* Recursive file name */
  55         isc_boolean_t           version_set;    /* User has set version */
  56         char *                  version;        /* User-specified version */
  57         isc_boolean_t           hostname_set;   /* User has set hostname */
  58         char *                  hostname;       /* User-specified hostname */
  59         /* Use hostname for server id */
  60         isc_boolean_t           server_usehostname;
  61         char *                  server_id;      /* User-specified server id */
  62
  63         /*
  64          * Current ACL environment.  This defines the
  65          * current values of the localhost and localnets
  66          * ACLs.
  67          */
  68         dns_aclenv_t            aclenv;
  69
  70         /* Server data structures. */
  71         dns_loadmgr_t *         loadmgr;
  72         dns_zonemgr_t *         zonemgr;
  73         dns_viewlist_t          viewlist;
  74         ns_interfacemgr_t *     interfacemgr;
  75         dns_db_t *              in_roothints;
  76         dns_tkeyctx_t *         tkeyctx;
  77
  78         isc_timer_t *           interface_timer;
  79         isc_timer_t *           heartbeat_timer;
  80         isc_uint32_t            interface_interval;
  81         isc_uint32_t            heartbeat_interval;
  82
  83         isc_mutex_t             reload_event_lock;
  84         isc_event_t *           reload_event;
  85
  86         isc_boolean_t           flushonshutdown;
  87         isc_boolean_t           log_queries;    /* For BIND 8 compatibility */
  88
  89         isc_uint64_t *          querystats;     /* Query statistics counters */
  90
  91         ns_controls_t *         controls;       /* Control channels */
  92         unsigned int            dispatchgen;
  93         ns_dispatchlist_t       dispatches;
  94
  95 };
  96
  97 #define NS_SERVER_MAGIC                 ISC_MAGIC('S','V','E','R')
  98 #define NS_SERVER_VALID(s)              ISC_MAGIC_VALID(s, NS_SERVER_MAGIC)
  99
 100 void
 101 ns_server_create(isc_mem_t *mctx, ns_server_t **serverp);
 102 /*
 103  * Create a server object with default settings.
 104  * This function either succeeds or causes the program to exit
 105  * with a fatal error.
 106  */
 107
 108 void
 109 ns_server_destroy(ns_server_t **serverp);
 110 /*
 111  * Destroy a server object, freeing its memory.
 112  */
 113
 114 void
 115 ns_server_reloadwanted(ns_server_t *server);
 116 /*
 117  * Inform a server that a reload is wanted.  This function
 118  * may be called asynchronously, from outside the server's task.
 119  * If a reload is already scheduled or in progress, the call
 120  * is ignored.
 121  */
 122
 123 void
 124 ns_server_flushonshutdown(ns_server_t *server, isc_boolean_t flush);
 125 /*
 126  * Inform the server that the zones should be flushed to disk on shutdown.
 127  */
 128
 129 isc_result_t
 130 ns_server_reloadcommand(ns_server_t *server, char *args, isc_buffer_t *text);
 131 /*
 132  * Act on a "reload" command from the command channel.
 133  */
 134
 135 isc_result_t
 136 ns_server_reconfigcommand(ns_server_t *server, char *args);
 137 /*
 138  * Act on a "reconfig" command from the command channel.
 139  */
 140
 141 isc_result_t
 142 ns_server_refreshcommand(ns_server_t *server, char *args, isc_buffer_t *text);
 143 /*
 144  * Act on a "refresh" command from the command channel.
 145  */
 146
 147 isc_result_t
 148 ns_server_retransfercommand(ns_server_t *server, char *args);
 149 /*
 150  * Act on a "retransfer" command from the command channel.
 151  */
 152
 153 isc_result_t
 154 ns_server_togglequerylog(ns_server_t *server);
 155 /*
 156  * Toggle logging of queries, as in BIND 8.
 157  */
 158
 159 /*
 160  * Dump the current statistics to the statistics file.
 161  */
 162 isc_result_t
 163 ns_server_dumpstats(ns_server_t *server);
 164
 165 /*
 166  * Dump the current cache to the dump file.
 167  */
 168 isc_result_t
 169 ns_server_dumpdb(ns_server_t *server, char *args);
 170
 171 /*
 172  * Change or increment the server debug level.
 173  */
 174 isc_result_t
 175 ns_server_setdebuglevel(ns_server_t *server, char *args);
 176
 177 /*
 178  * Flush the server's cache(s)
 179  */
 180 isc_result_t
 181 ns_server_flushcache(ns_server_t *server, char *args);
 182
 183 /*
 184  * Flush a particular name from the server's cache(s)
 185  */
 186 isc_result_t
 187 ns_server_flushname(ns_server_t *server, char *args);
 188
 189 /*
 190  * Report the server's status.
 191  */
 192 isc_result_t
 193 ns_server_status(ns_server_t *server, isc_buffer_t *text);
 194
 195 /*
 196  * Enable or disable updates for a zone.
 197  */
 198 isc_result_t
 199 ns_server_freeze(ns_server_t *server, isc_boolean_t freeze, char *args);
 200
 201 /*
 202  * Dump the current recursive queries.
 203  */
 204 isc_result_t
 205 ns_server_dumprecursing(ns_server_t *server);
 206
 207 /*
 208  * Maintain a list of dispatches that require reserved ports.
 209  */
 210 void
 211 ns_add_reserved_dispatch(ns_server_t *server, const isc_sockaddr_t *addr);
 212
 213 #endif /* NAMED_SERVER_H */