/* * from ns.h 4.33 (Berkeley) 8/23/90 * $Id: ns_defs.h,v 8.115 2002/01/29 03:59:35 marka Exp $ */ /* * Copyright (c) 1986 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ /* * Portions Copyright (c) 1996-2000 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ /* * Portions Copyright (c) 1999 by Check Point Software Technologies, Inc. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Check Point Software Technologies Incorporated not be used * in advertising or publicity pertaining to distribution of the document * or software without specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND CHECK POINT SOFTWARE TECHNOLOGIES * INCORPORATED DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. * IN NO EVENT SHALL CHECK POINT SOFTWARE TECHNOLOGIES INCORPRATED * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * Global definitions for the name server. */ /* * Effort has been expended here to make all structure members 32 bits or * larger land on 32-bit boundaries; smaller structure members have been * deliberately shuffled and smaller integer sizes chosen where possible * to make sure this happens. This is all meant to avoid structure member * padding which can cost a _lot_ of memory when you have hundreds of * thousands of entries in your cache. */ /* * Timeout time should be around 1 minute or so. Using the * the current simplistic backoff strategy, the sequence * retrys after 4, 8, and 16 seconds. With 3 servers, this * dies out in a little more than a minute. * (sequence RETRYBASE, 2*RETRYBASE, 4*RETRYBASE... for MAXRETRY) */ #define NEWZONES 64 /* how many zones to grow the zone table by */ #define INITIALZONES NEWZONES /* how many zones are allocated initially */ #define MINROOTS 2 /* min number of root hints */ #define NSMAX 16 /* max number of NS addrs to try ([0..255]) */ #define RETRYBASE 4 /* base time between retries */ #define MAXCLASS 255 /* XXX - may belong elsewhere */ #define MAXRETRY 3 /* max number of retries per addr */ #define MAXCNAMES 8 /* max # of CNAMES tried per addr */ #define MAXQUERIES 20 /* max # of queries to be made */ #define MAXQSERIAL 4 /* max # of outstanding QSERIAL's */ /* (prevent "recursive" loops) */ #define INIT_REFRESH 600 /* retry time for initial slave */ /* contact (10 minutes) */ #define MIN_REFRESH 2 /* never refresh more frequently than once */ /* every MIN_REFRESH seconds */ #define MIN_RETRY 1 /* never retry more frequently than once */ /* every MIN_RETRY seconds */ #define MAX_REFRESH 2419200 /* perform a refresh query at least */ /* every 4 weeks*/ #define MAX_RETRY 1209600 /* perform a retry after no more than 2 weeks */ #define MAX_EXPIRE 31536000 /* expire a zone if we have not talked to */ /* the primary in 1 year */ #define NADDRECS 20 /* max addt'l rr's per resp */ #define XFER_TIMER 120 /* named-xfer's connect timeout */ #define MAX_XFER_TIME 60*60*2 /* default max seconds for an xfer */ #define XFER_TIME_FUDGE 10 /* MAX_XFER_TIME fudge */ #define MAX_XFERS_RUNNING 20 /* max value of transfers_in */ #define DEFAULT_XFERS_RUNNING 10 /* default value of transfers_in */ #define DEFAULT_XFERS_PER_NS 2 /* default # of xfers per peer nameserver */ #define XFER_BUFSIZE (16*1024) /* arbitrary but bigger than most MTU's */ #define MAX_SYNCDELAY 3 /* Presumed timeout in use by our clients. */ #define MAX_SYNCDRAIN 100000 /* How long we'll spin in drain_all_rcvbuf. */ #define MAX_SYNCSTORE 500 #define NS_MAX_DISTANCE 3 /* maximum nameserver chaining before failure */ /* maximum time to cache negative answers */ #define DEFAULT_MAX_NCACHE_TTL (3*60*60) #define ALPHA 0.7 /* How much to preserve of old response time */ #define BETA 1.2 /* How much to penalize response time on failure */ #define GAMMA 0.98 /* How much to decay unused response times */ /* What maintainance operations need to be performed sometime soon? */ typedef enum need { main_need_zreload = 0, /* ns_zreload() needed. */ main_need_reload, /* ns_reload() needed. */ main_need_reconfig, /* ns_reconfig() needed. */ main_need_endxfer, /* endxfer() needed. */ main_need_zoneload, /* loadxfer() needed. */ main_need_dump, /* doadump() needed. */ main_need_statsdump, /* ns_stats() needed. */ main_need_statsdumpandclear, /* ns_stats() needed. */ main_need_exit, /* exit() needed. */ main_need_qrylog, /* toggle_qrylog() needed. */ main_need_debug, /* use_desired_debug() needed. */ main_need_restart, /* exec() needed. */ main_need_reap, /* need to reap dead children */ main_need_noexpired, /* ns_reconfig() needed w/ noexpired set */ main_need_num, /* number of needs, used for array bound. */ main_need_tick /* tick every second to poll for cleanup (NT)*/ } main_need; /* What global options are set? */ #define OPTION_NORECURSE 0x00000001 /* Don't recurse even if asked. */ #define OPTION_NOFETCHGLUE 0x00000002 /* Don't fetch missing glue. */ #define OPTION_FORWARD_ONLY 0x00000004 /* Don't use NS RR's, just forward. */ #define OPTION_FAKE_IQUERY 0x00000008 /* Fake up bogus response to IQUERY. */ #ifdef BIND_NOTIFY #define OPTION_NONOTIFY 0x00000010 /* Turn off notify */ #define OPTION_SUPNOTIFY_INITIAL 0x00000020 /* Supress initial notify */ #endif #define OPTION_NONAUTH_NXDOMAIN 0x00000040 /* Generate non-auth NXDOMAINs? */ #define OPTION_MULTIPLE_CNAMES 0x00000080 /* Allow a name to have multiple * CNAME RRs */ #define OPTION_HOSTSTATS 0x00000100 /* Maintain per-host statistics? */ #define OPTION_DEALLOC_ON_EXIT 0x00000200 /* Deallocate everything on exit? */ #define OPTION_NODIALUP 0x00000400 /* Turn off dialup support */ #define OPTION_NORFC2308_TYPE1 0x00000800 /* Prevent type1 respones (RFC 2308) * to cached negative respones */ #define OPTION_USE_ID_POOL 0x00001000 /* Use the memory hogging query ID */ #define OPTION_TREAT_CR_AS_SPACE 0x00002000 /* Treat CR in zone files as * space */ #define OPTION_USE_IXFR 0x00004000 /* Use by default ixfr in zone * transfer */ #define OPTION_MAINTAIN_IXFR_BASE 0x00008000 /* Part of IXFR file name logic. */ #define OPTION_HITCOUNT 0x00010000 /* Keep track of each time an * RR gets hit in the database */ #define DEFAULT_OPTION_FLAGS (OPTION_NODIALUP|OPTION_NONAUTH_NXDOMAIN|\ OPTION_USE_ID_POOL|OPTION_NORFC2308_TYPE1) #ifdef BIND_UPDATE #define SOAINCRINTVL 300 /* default value for the time after which * the zone serial number must be incremented * after a successful update has occurred */ #define DUMPINTVL 3600 /* default interval at which to dump changed zones * randomized, not exact */ #define DEFERUPDCNT 100 /* default number of updates that can happen * before the zone serial number will be * incremented */ #define UPDATE_TIMER XFER_TIMER #endif /* BIND_UPDATE */ #define USE_MINIMUM 0xffffffff #define MAXIMUM_TTL 0x7fffffff #define CLEAN_TIMER 0x01 #define INTERFACE_TIMER 0x02 #define STATS_TIMER 0x04 #define HEARTBEAT_TIMER 0x08 /* IP address accessor, network byte order. */ #define ina_ulong(ina) (ina.s_addr) /* IP address accessor, host byte order, read only. */ #define ina_hlong(ina) ntohl(ina.s_addr) /* IP address equality. */ /* XXX: assumes that network byte order won't affect equality. */ #define ina_equal(a, b) (ina_ulong(a) == ina_ulong(b)) /* IP address equality with a mask. */ #define ina_onnet(h, n, m) ((ina_ulong(h) & ina_ulong(m)) == ina_ulong(n)) /* Sequence space arithmetic. */ #define SEQ_GT(a,b) ((int32_t)((a)-(b)) > 0) #define SEQ_LT(a,b) ((int32_t)((a)-(b)) < 0) #define NS_OPTION_P(option) ((server_options == NULL) ? \ (panic(panic_msg_no_options, NULL), 0) : \ ((server_options->flags & option) != 0)) #define NS_ZOPTION_P(zp, option) \ (((zp) != NULL && (((zp)->z_optset & option) != 0)) ? \ (((zp)->z_options & option) != 0) : NS_OPTION_P(option)) #define NS_ZFWDTAB(zp) (((zp) == NULL) ? \ server_options->fwdtab : (zp)->z_fwdtab) #define NS_INCRSTAT(addr, which) \ do { \ if ((int)which >= (int)nssLast) \ ns_panic(ns_log_insist, 1, panic_msg_bad_which, \ __FILE__, __LINE__, #which); \ else { \ if (NS_OPTION_P(OPTION_HOSTSTATS)) { \ struct nameser *ns = \ nameserFind(addr, NS_F_INSERT); \ if (ns != NULL) \ ns->stats[(int)which]++; \ } \ globalStats[(int)which]++; \ } \ } while (0) enum severity { ignore, warn, fail, not_set }; #ifdef BIND_NOTIFY enum znotify { znotify_use_default=0, znotify_yes, znotify_no }; #endif enum zdialup { zdialup_use_default=0, zdialup_yes, zdialup_no }; enum axfr_format { axfr_use_default=0, axfr_one_answer, axfr_many_answers }; struct ip_match_direct { struct in_addr address; struct in_addr mask; }; struct ip_match_indirect { struct ip_match_list *list; }; struct ip_match_key { struct dst_key *key; }; typedef enum { ip_match_pattern, ip_match_indirect, ip_match_localhost, ip_match_localnets, ip_match_key } ip_match_type; typedef struct ip_match_element { ip_match_type type; u_int flags; union { struct ip_match_direct direct; struct ip_match_indirect indirect; struct ip_match_key key; } u; struct ip_match_element *next; } *ip_match_element; /* Flags for ip_match_element */ #define IP_MATCH_NEGATE 0x01 /* match means deny access */ typedef struct ip_match_list { ip_match_element first; ip_match_element last; } *ip_match_list; typedef struct ztimer_info { char *name; int class; int type; } *ztimer_info; /* * These fields are ordered to maintain word-alignment; * be careful about changing them. */ struct zoneinfo { char *z_origin; /* root domain name of zone */ time_t z_time; /* time for next refresh */ time_t z_lastupdate; /* time of last soa serial increment */ u_int32_t z_refresh; /* refresh interval */ u_int32_t z_retry; /* refresh retry interval */ u_int32_t z_expire; /* expiration time for cached info */ u_int32_t z_minimum; /* minimum TTL value */ u_int32_t z_serial; /* changes if zone modified */ char *z_source; /* source location of data */ time_t z_ftime; /* modification time of source file */ struct in_addr z_axfr_src; /* bind() the axfr socket to this */ struct in_addr z_addr[NSMAX]; /* list of master servers for zone */ struct dst_key * z_keys[NSMAX]; /* tsig key associated with master */ u_char z_addrcnt; /* number of entries in z_addr[] */ struct in_addr z_xaddr[NSMAX]; /* list of master servers for xfer */ u_char z_xaddrcnt; /* number of entries in z_xaddr[] */ u_char z_type; /* type of zone; see below */ u_int32_t z_flags; /* state bits; see below */ pid_t z_xferpid; /* xfer child pid */ u_int z_options; /* options set specific to this zone */ u_int z_optset; /* which opts override global opts */ int z_class; /* class of zone */ int z_numxfrs; /* Ref count of concurrent xfrs. */ enum severity z_checknames; /* How to handle non-RFC-compliant names */ #ifdef BIND_UPDATE time_t z_dumptime; /* randomized time for next zone dump * if Z_NEED_DUMP is set */ u_int32_t z_dumpintvl; /* time interval between zone dumps */ time_t z_soaincrintvl; /* interval for updating soa serial */ time_t z_soaincrtime; /* time for soa increment */ u_int32_t z_deferupdcnt; /* max number of updates before SOA * serial number incremented */ u_int32_t z_updatecnt; /* number of update requests processed * since the last SOA serial update */ char *z_updatelog; /* log file for updates */ #endif ip_match_list z_update_acl; /* list of who can issue dynamic updates */ ip_match_list z_query_acl; /* sites we'll answer questions for */ ip_match_list z_transfer_acl; /* sites that may get a zone transfer from us */ long z_max_transfer_time_in; /* max num seconds for AXFR */ #ifdef BIND_NOTIFY enum znotify z_notify; /* Notify mode */ struct in_addr *z_also_notify; /* More nameservers to notify */ int z_notify_count; #endif enum zdialup z_dialup; /* secondaries over a dialup link */ char *z_ixfr_base; /* where to find the history of the zone */ char *z_ixfr_tmp; /* tmp file for the ixfr */ int z_maintain_ixfr_base; long z_max_log_size_ixfr; u_int32_t z_serial_ixfr_start; evTimerID z_timer; /* maintenance timer */ ztimer_info z_timerinfo; /* UAP associated with timer */ time_t z_nextmaint; /* time of next maintenance */ u_int16_t z_port; /* perform AXFR to this port */ struct fwdinfo *z_fwdtab; /* zone-specific forwarders */ LINK(struct zoneinfo) z_freelink; /* if it's on the free list. */ LINK(struct zoneinfo) z_reloadlink; /* if it's on the reload list. */ }; /* zone types (z_type) */ enum zonetype { z_nil, z_master, z_slave, z_hint, z_stub, z_forward, z_cache, z_any }; #define Z_NIL z_nil /* XXX */ #define Z_MASTER z_master /* XXX */ #define Z_PRIMARY z_master /* XXX */ #define Z_SLAVE z_slave /* XXX */ #define Z_SECONDARY z_slave /* XXX */ #define Z_HINT z_hint /* XXX */ #define Z_CACHE z_cache /* XXX */ #define Z_STUB z_stub /* XXX */ #define Z_FORWARD z_forward /* XXX */ #define Z_ANY z_any /* XXX*2 */ /* zone state bits (32 bits) */ #define Z_AUTH 0x00000001 /* zone is authoritative */ #define Z_NEED_XFER 0x00000002 /* waiting to do xfer */ #define Z_XFER_RUNNING 0x00000004 /* asynch. xfer is running */ #define Z_NEED_RELOAD 0x00000008 /* waiting to do reload */ #define Z_SYSLOGGED 0x00000010 /* have logged timeout */ #define Z_QSERIAL 0x00000020 /* sysquery()'ing for serial number */ #define Z_FOUND 0x00000040 /* found in boot file when reloading */ #define Z_INCLUDE 0x00000080 /* set if include used in file */ #define Z_DB_BAD 0x00000100 /* errors when loading file */ #define Z_TMP_FILE 0x00000200 /* backup file for xfer is temporary */ #ifdef BIND_UPDATE #define Z_DYNAMIC 0x00000400 /* allow dynamic updates */ #define Z_NEED_DUMP 0x00000800 /* zone has changed, needs a dump */ #define Z_NEED_SOAUPDATE 0x00001000 /* soa serial number needs increment */ #endif /* BIND_UPDATE */ #define Z_XFER_ABORTED 0x00002000 /* zone transfer has been aborted */ #define Z_XFER_GONE 0x00004000 /* zone transfer process is gone */ #define Z_TIMER_SET 0x00008000 /* z_timer contains a valid id */ #ifdef BIND_NOTIFY #define Z_NOTIFY 0x00010000 /* has an outbound notify executing */ #endif #define Z_NEED_QSERIAL 0x00020000 /* we need to re-call qserial() */ #define Z_PARENT_RELOAD 0x00040000 /* we need to reload this as parent */ #define Z_FORWARD_SET 0x00080000 /* has forwarders been set */ #define Z_EXPIRED 0x00100000 /* expire timer has gone off */ #define Z_NEEDREFRESH 0x00200000 /* need to perform a refresh check */ /* named_xfer exit codes */ #define XFER_UPTODATE 0 /* zone is up-to-date */ #define XFER_SUCCESS 1 /* performed transfer successfully */ #define XFER_TIMEOUT 2 /* no server reachable/xfer timeout */ #define XFER_FAIL 3 /* other failure, has been logged */ #define XFER_SUCCESSAXFR 4 /* named-xfr recived a xfr */ #define XFER_SUCCESSIXFR 5 /* named-xfr recived a ixfr */ #define XFER_SUCCESSAXFRIXFRFILE 6 /* named-xfr received AXFR for IXFR */ #define XFER_ISAXFR -1 /* the last XFR is AXFR */ #define XFER_ISIXFR -2 /* the last XFR is IXFR */ #define XFER_ISAXFRIXFR -3 /* the last XFR is AXFR but we must create IXFR base */ struct qserv { struct sockaddr_in ns_addr; /* address of NS */ struct databuf *ns; /* databuf for NS record */ struct databuf *nsdata; /* databuf for server address */ struct timeval stime; /* time first query started */ unsigned int forwarder:1; /* this entry is for a forwarder */ unsigned int noedns:1; /* don't try edns */ unsigned int nretry:30; /* # of times addr retried */ u_int32_t serial; /* valid if Q_ZSERIAL */ }; /* * Structure for recording info on forwarded or generated queries. */ struct qinfo { u_int16_t q_id; /* id of query */ u_int16_t q_nsid; /* id of forwarded query */ struct sockaddr_in q_from; /* requestor's address */ u_char *q_msg, /* the message */ *q_cmsg; /* the cname message */ int16_t q_msglen, /* len of message */ q_msgsize, /* allocated size of message */ q_cmsglen, /* len of cname message */ q_cmsgsize; /* allocated size of cname message */ int16_t q_dfd; /* UDP file descriptor */ int16_t q_udpsize; /* UDP message size */ int q_distance; /* distance this query is from the * original query that the server * received. */ time_t q_time; /* time to retry */ time_t q_expire; /* time to expire */ struct qinfo *q_next; /* rexmit list (sorted by time) */ struct qinfo *q_link; /* storage list (random order) */ struct databuf *q_usedns[NSMAX]; /* databuf for NS that we've tried */ struct qserv q_addr[NSMAX]; /* addresses of NS's */ #ifdef notyet struct nameser *q_ns[NSMAX]; /* name servers */ #endif struct dst_key *q_keys[NSMAX]; /* keys to use with this address */ u_char q_naddr; /* number of addr's in q_addr */ u_char q_curaddr; /* last addr sent to */ u_char q_nusedns; /* number of elements in q_usedns[] */ u_int8_t q_flags; /* see below */ int16_t q_cname; /* # of cnames found */ int16_t q_nqueries; /* # of queries required */ struct qstream *q_stream; /* TCP stream, null if UDP */ struct zoneinfo *q_zquery; /* Zone query is about (Q_ZSERIAL) */ struct zoneinfo *q_fzone; /* Forwarding zone, if any */ char *q_domain; /* domain of most enclosing zone cut */ char *q_name; /* domain of query */ u_int16_t q_class; /* class of query */ u_int16_t q_type; /* type of query */ #ifdef BIND_NOTIFY int q_notifyzone; /* zone which needs another znotify() * when the reply to this comes in. */ #endif struct tsig_record *q_tsig; /* forwarded query's TSIG record */ struct tsig_record *q_nstsig; /* forwarded query's TSIG record */ }; /* q_flags bits (8 bits) */ #define Q_SYSTEM 0x01 /* is a system query */ #define Q_PRIMING 0x02 /* generated during priming phase */ #define Q_ZSERIAL 0x04 /* getting zone serial for xfer test */ #define Q_USEVC 0x08 /* forward using tcp not udp */ #define Q_EDNS 0x10 /* add edns opt record to answer */ #define Q_NEXTADDR(qp,n) (&(qp)->q_addr[n].ns_addr) #define RETRY_TIMEOUT 45 /* * Return codes from ns_forw: */ #define FW_OK 0 #define FW_DUP 1 #define FW_NOSERVER 2 #define FW_SERVFAIL 3 typedef void (*sq_closure)(struct qstream *qs); #ifdef BIND_UPDATE struct fdlist { int fd; struct fdlist *next; }; #endif typedef struct ns_delta { LINK(struct ns_delta) d_link; ns_updque d_changes; } ns_delta; typedef LIST(ns_delta) ns_deltalist; typedef struct _interface { int dfd, /* Datagram file descriptor */ sfd; /* Stream file descriptor. */ time_t gen; /* Generation number. */ struct in_addr addr; /* Interface address. */ u_int16_t port; /* Interface port. */ u_int16_t flags; /* Valid bits for evXXXXID. */ evFileID evID_d; /* Datagram read-event. */ evConnID evID_s; /* Stream listen-event. */ LINK(struct _interface) link; } interface; #define INTERFACE_FILE_VALID 0x01 #define INTERFACE_CONN_VALID 0x02 #define INTERFACE_FORWARDING 0x04 struct qstream { int s_rfd; /* stream file descriptor */ int s_size; /* expected amount of data to rcv */ int s_bufsize; /* amount of data received in s_buf */ u_char *s_buf; /* buffer of received data */ u_char *s_wbuf; /* send buffer */ u_char *s_wbuf_send; /* next sendable byte of send buffer */ u_char *s_wbuf_free; /* next free byte of send buffer */ u_char *s_wbuf_end; /* byte after end of send buffer */ sq_closure s_wbuf_closure; /* callback for writable descriptor */ struct qstream *s_next; /* next stream */ struct sockaddr_in s_from; /* address query came from */ interface *s_ifp; /* interface query came from */ time_t s_time; /* time stamp of last transaction */ int s_refcnt; /* number of outstanding queries */ u_char s_temp[HFIXEDSZ]; #ifdef BIND_UPDATE int s_opcode; /* type of request */ int s_linkcnt; /* number of client connections using * this connection to forward updates * to the primary */ struct fdlist *s_fds; /* linked list of connections to the * primaries that have been used by * the server to forward this client's * update requests */ #endif evStreamID evID_r; /* read event. */ evFileID evID_w; /* writable event handle. */ evConnID evID_c; /* connect event handle */ u_int flags; /* see below */ struct qstream_xfr { enum { s_x_base, s_x_firstsoa, s_x_zone, s_x_lastsoa, s_x_done, s_x_adding, s_x_deleting, s_x_addsoa, s_x_deletesoa } state; /* state of transfer. */ u_char *msg, /* current assembly message. */ *cp, /* where are we in msg? */ *eom, /* end of msg. */ *ptrs[128]; /* ptrs for dn_comp(). */ int class, /* class of an XFR. */ type, /* type of XFR. */ id, /* id of an XFR. */ opcode; /* opcode of an XFR. */ u_int zone; /* zone being XFR'd. */ union { struct namebuf *axfr; /* top np of an AXFR. */ ns_deltalist *ixfr; /* top udp of an IXFR. */ } top; int ixfr_zone; u_int32_t serial; /* serial number requested in IXFR */ ns_tcp_tsig_state *tsig_state; /* used by ns_sign_tcp */ int tsig_skip; /* skip calling ns_sign_tcp * during the next flush */ struct qs_x_lev { /* decompose the recursion. */ enum {sxl_ns, sxl_all, sxl_sub} state; /* what's this level doing? */ int flags; /* see below (SXL_*). */ char dname[MAXDNAME]; struct namebuf *np, /* this node. */ *nnp, /* next node to process. */ **npp, /* subs. */ **npe; /* end of subs. */ struct databuf *dp; /* current rr. */ struct qs_x_lev *next; /* link. */ } *lev; /* LIFO. */ enum axfr_format transfer_format; } xfr; }; #define SXL_GLUING 0x01 #define SXL_ZONECUT 0x02 /* flags */ #define STREAM_MALLOC 0x01 #define STREAM_WRITE_EV 0x02 #define STREAM_READ_EV 0x04 #define STREAM_CONNECT_EV 0x08 #define STREAM_DONE_CLOSE 0x10 #define STREAM_AXFR 0x20 #define STREAM_AXFRIXFR 0x40 #define ALLOW_NETS 0x0001 #define ALLOW_HOSTS 0x0002 #define ALLOW_ALL (ALLOW_NETS | ALLOW_HOSTS) struct fwddata { struct sockaddr_in fwdaddr; /* address of NS */ struct databuf *ns; /* databuf for NS record */ struct databuf *nsdata; /* databuf for server address */ int ref_count; /* how many users of this */ }; struct fwdinfo { struct fwdinfo *next; struct fwddata *fwddata; }; enum nameserStats { nssRcvdR, /* sent us an answer */ nssRcvdNXD, /* sent us a negative response */ nssRcvdFwdR, /* sent us a response we had to fwd */ nssRcvdDupR, /* sent us an extra answer */ nssRcvdFail, /* sent us a SERVFAIL */ nssRcvdFErr, /* sent us a FORMERR */ nssRcvdErr, /* sent us some other error */ nssRcvdAXFR, /* sent us an AXFR */ nssRcvdLDel, /* sent us a lame delegation */ nssRcvdOpts, /* sent us some IP options */ nssSentSysQ, /* sent them a sysquery */ nssSentAns, /* sent them an answer */ nssSentFwdQ, /* fwdd a query to them */ nssSentDupQ, /* sent them a retry */ nssSendtoErr, /* error in sendto */ nssRcvdQ, /* sent us a query */ nssRcvdIQ, /* sent us an inverse query */ nssRcvdFwdQ, /* sent us a query we had to fwd */ nssRcvdDupQ, /* sent us a retry */ nssRcvdTCP, /* sent us a query using TCP */ nssSentFwdR, /* fwdd a response to them */ nssSentFail, /* sent them a SERVFAIL */ nssSentFErr, /* sent them a FORMERR */ nssSentNaAns, /* sent them a non autoritative answer */ nssSentNXD, /* sent them a negative response */ nssRcvdUQ, /* sent us an unapproved query */ nssRcvdURQ, /* sent us an unapproved recursive query */ nssRcvdUXFR, /* sent us an unapproved AXFR or IXFR */ nssRcvdUUpd, /* sent us an unapproved update */ nssLast }; struct nameser { struct in_addr addr; /* key */ u_long stats[nssLast]; /* statistics */ #ifdef notyet u_int32_t rtt; /* round trip time */ /* XXX - need to add more stuff from "struct qserv", and use our rtt */ u_int16_t flags; /* see below */ u_int8_t xfers; /* #/xfers running right now */ #endif }; enum transport { primary_trans, secondary_trans, response_trans, update_trans, num_trans }; /* types used by the parser or config routines */ typedef struct zone_config { void *opaque; } zone_config; typedef struct listen_info { u_short port; ip_match_list list; struct listen_info *next; } *listen_info; typedef struct listen_info_list { listen_info first; listen_info last; } *listen_info_list; #ifndef RLIMIT_TYPE #define RLIMIT_TYPE u_long #endif typedef RLIMIT_TYPE rlimit_type; struct control; typedef struct control *control; typedef LIST(struct control) controls; enum ordering { unknown_order, fixed_order, cyclic_order, random_order }; #define DEFAULT_ORDERING cyclic_order typedef struct rrset_order_element { int class; int type; char *name; enum ordering order; struct rrset_order_element *next; } *rrset_order_element ; typedef struct rrset_order_list { rrset_order_element first; rrset_order_element last; } *rrset_order_list; typedef struct options { u_int32_t flags; char *hostname; char *version; char *directory; char *dump_filename; char *pid_filename; char *stats_filename; char *memstats_filename; char *named_xfer; int transfers_in; int transfers_per_ns; int transfers_out; int serial_queries; int max_log_size_ixfr; enum axfr_format transfer_format; long max_transfer_time_in; struct sockaddr_in query_source; struct in_addr axfr_src; #ifdef BIND_NOTIFY int notify_count; struct in_addr *also_notify; #endif ip_match_list query_acl; ip_match_list recursion_acl; ip_match_list transfer_acl; ip_match_list blackhole_acl; ip_match_list topology; ip_match_list sortlist; enum severity check_names[num_trans]; u_long data_size; u_long stack_size; u_long core_size; u_long files; listen_info_list listen_list; struct fwdinfo *fwdtab; /* XXX need to add forward option */ int clean_interval; int interface_interval; int stats_interval; rrset_order_list ordering; int heartbeat_interval; u_int max_ncache_ttl; u_int max_host_stats; u_int lame_ttl; int minroots; u_int16_t preferred_glue; } *options; typedef struct key_list_element { struct dst_key *key; struct key_list_element *next; } *key_list_element; typedef struct key_info_list { key_list_element first; key_list_element last; } *key_info_list; typedef struct topology_config { void *opaque; } topology_config; #define UNKNOWN_TOPOLOGY_DISTANCE 9998 #define MAX_TOPOLOGY_DISTANCE 9999 typedef struct topology_distance { ip_match_list patterns; struct topology_distance *next; } *topology_distance; typedef struct topology_context { topology_distance first; topology_distance last; } *topology_context; typedef struct acl_table_entry { char *name; ip_match_list list; struct acl_table_entry *next; } *acl_table_entry; typedef struct server_config { void *opaque; } server_config; #define SERVER_INFO_BOGUS 0x01 #define SERVER_INFO_SUPPORT_IXFR 0x02 typedef struct server_info { struct in_addr address; u_int flags; int transfers; enum axfr_format transfer_format; key_info_list key_list; /* could move statistics to here, too */ struct server_info *next; } *server_info; /* * enum <--> name translation */ struct ns_sym { int number; /* Identifying number, like ns_log_default */ const char * name; /* Its symbolic name, like "default" */ }; /* * Logging options */ typedef enum ns_logging_categories { ns_log_default = 0, ns_log_config, ns_log_parser, ns_log_queries, ns_log_lame_servers, ns_log_statistics, ns_log_panic, ns_log_update, ns_log_ncache, ns_log_xfer_in, ns_log_xfer_out, ns_log_db, ns_log_eventlib, ns_log_packet, #ifdef BIND_NOTIFY ns_log_notify, #endif ns_log_cname, ns_log_security, ns_log_os, ns_log_insist, ns_log_maint, ns_log_load, ns_log_resp_checks, ns_log_control, ns_log_max_category } ns_logging_categories; typedef struct log_config { log_context log_ctx; log_channel eventlib_channel; log_channel packet_channel; int default_debug_active; } *log_config; struct map { const char * token; int val; }; #define NOERROR_NODATA 15 /* only used internally by the server, used for * -ve $ing non-existence of records. 15 is not * a code used as yet anyway. */ #define NTTL 600 /* ttl for negative data: 10 minutes? */ #define VQEXPIRY 900 /* a VQ entry expires in 15*60 = 900 seconds */ #ifdef BIND_UPDATE enum req_action { Finish, Refuse, Return }; #endif #ifdef INIT error "INIT already defined, check system include files" #endif #ifdef DECL error "DECL already defined, check system include files" #endif #ifdef MAIN_PROGRAM #define INIT(x) = x #define DECL #else #define INIT(x) #define DECL extern #endif #define EDNS_MESSAGE_SZ 4096