Import (trimmed) ISC bind-8.1.2-t3b. This will be updated to 8.1.2 on

final release.

Obtained from:  ftp.isc.org

1 files changed, 756 insertions, 0 deletions

diff --git a/contrib/bind/bin/named/ns_defs.h b/contrib/bind/bin/named/ns_defs.h
new file mode 100644
index 0000000..f81a383
--- /dev/null
+++ b/contrib/bind/bin/named/ns_defs.h
@@ -0,0 +1,756 @@
+/*
+ *	from ns.h	4.33 (Berkeley) 8/23/90
+ *	$Id: ns_defs.h,v 8.38 1998/03/17 03:22:27 halley 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, 1997 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.
+ */
+
+/*
+ * 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 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 secondary */
+				/* 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 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 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? */
+#define	MAIN_NEED_RELOAD	0x0001	/* db_reload() needed. */
+#define	MAIN_NEED_MAINT		0x0002	/* ns_maint() needed. */
+#define	MAIN_NEED_ENDXFER	0x0004	/* endxfer() needed. */
+#define	MAIN_NEED_ZONELOAD	0x0008	/* loadxfer() needed. */
+#define	MAIN_NEED_DUMP		0x0010	/* doadump() needed. */
+#define	MAIN_NEED_STATSDUMP	0x0020	/* ns_stats() needed. */
+#define	MAIN_NEED_EXIT		0x0040	/* exit() needed. */
+#define	MAIN_NEED_QRYLOG	0x0080	/* toggle_qrylog() needed. */
+#define	MAIN_NEED_DEBUG		0x0100	/* use_desired_debug() needed. */
+#define	MAIN_NEED_NOTIFY	0x0200	/* do_notify_after_load() needed */
+
+	/* What global options are set? */
+#define	OPTION_NORECURSE	0x0001	/* Don't recurse even if asked. */
+#define	OPTION_NOFETCHGLUE	0x0002	/* Don't fetch missing glue. */
+#define	OPTION_FORWARD_ONLY	0x0004	/* Don't use NS RR's, just forward. */
+#define	OPTION_FAKE_IQUERY	0x0008	/* Fake up bogus response to IQUERY. */
+#define	OPTION_NONOTIFY		0x0010	/* Turn off notify */
+#define	OPTION_NONAUTH_NXDOMAIN	0x0020	/* Generate non-auth NXDOMAINs? */
+#define	OPTION_MULTIPLE_CNAMES	0x0040	/* Allow a name to have multiple
+					 * CNAME RRs */
+#define OPTION_HOSTSTATS	0x0080	/* Maintain per-host statistics? */
+#define OPTION_DEALLOC_ON_EXIT	0x0100	/* Deallocate everything on exit? */
+
+#define	DEFAULT_OPTION_FLAGS	(OPTION_HOSTSTATS)
+
+#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
+
+	/* 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	NS_OPTION_P(option) ((server_options == NULL) ? \
+		(panic(panic_msg_no_options, NULL), 0) : \
+		((server_options->flags & option) != 0))
+
+#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 };
+
+enum znotify { znotify_use_default=0, znotify_yes, znotify_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;
+};
+
+typedef enum { ip_match_pattern, ip_match_indirect, ip_match_localhost,
+	       ip_match_localnets } 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;
+	} 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_xaddr;	/* override server for next xfer */
+	struct in_addr	z_addr[NSMAX];	/* list of master servers for zone */
+	u_char		z_addrcnt;	/* number of entries in z_addr[] */
+	u_char		z_type;		/* type of zone; see below */
+	u_int16_t	z_flags;	/* state bits; see below */
+	pid_t		z_xferpid;	/* xfer child pid */
+	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 */
+	enum znotify	z_notify;	/* Notify mode */
+	struct in_addr	z_also_notify[NSMAX];  /* More nameservers to notify */
+	int		z_notify_count;
+	evTimerID	z_timer;	/* maintenance timer */
+	ztimer_info	z_timerinfo;	/* UAP associated with timer */
+	time_t		z_nextmaint;	/* time of next maintenance */
+};
+
+	/* zone types (z_type) */
+enum zonetype { z_nil, z_master, z_slave, z_hint, z_stub, 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_hint		/* XXX */
+#define Z_STUB		z_stub		/* XXX */
+#define Z_ANY		z_any		/* XXX*2 */
+
+	/* zone state bits (16 bits) */
+#define	Z_AUTH		0x0001		/* zone is authoritative */
+#define	Z_NEED_XFER	0x0002		/* waiting to do xfer */
+#define	Z_XFER_RUNNING	0x0004		/* asynch. xfer is running */
+#define	Z_NEED_RELOAD	0x0008		/* waiting to do reload */
+#define	Z_SYSLOGGED	0x0010		/* have logged timeout */
+#define	Z_QSERIAL	0x0020		/* sysquery()'ing for serial number */
+#define	Z_FOUND		0x0040		/* found in boot file when reloading */
+#define	Z_INCLUDE	0x0080		/* set if include used in file */
+#define	Z_DB_BAD	0x0100		/* errors when loading file */
+#define	Z_TMP_FILE	0x0200		/* backup file for xfer is temporary */
+#ifdef BIND_UPDATE
+#define	Z_DYNAMIC	0x0400		/* allow dynamic updates */
+#define	Z_NEED_DUMP	0x0800		/* zone has changed, needs a dump */
+#define	Z_NEED_SOAUPDATE 0x1000		/* soa serial number needs increment */
+#endif /* BIND_UPDATE */
+#define	Z_XFER_ABORTED	0x2000		/* zone transfer has been aborted */
+#define	Z_XFER_GONE	0x4000		/* zone transfer process is gone */
+#define	Z_TIMER_SET	0x8000		/* z_timer contains a valid id */
+
+	/* 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 */
+
+/* XXX - "struct qserv" is deprecated in favor of "struct nameser" */
+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 */
+	int		nretry;		/* # of times addr retried */
+};
+
+/*
+ * 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 */
+	struct fwdinfo	*q_fwd;		/* last	forwarder used */
+	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
+	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) */
+	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 a sysnotify()
+					 * when the reply to this comes in.
+					 */
+#endif
+};
+
+	/* 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_NEXTADDR(qp,n)	\
+	(((qp)->q_fwd == (struct fwdinfo *)0) ? \
+	 &(qp)->q_addr[n].ns_addr : &(qp)->q_fwd->fwdaddr)
+
+#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 _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 }
+				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. */
+				id,		/* id of an XFR. */
+				opcode;		/* opcode of an XFR. */
+		u_int		zone;		/* zone being XFR'd. */
+		struct namebuf	*top;		/* top np of an XFR. */
+		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 ALLOW_NETS	0x0001
+#define	ALLOW_HOSTS	0x0002
+#define	ALLOW_ALL	(ALLOW_NETS | ALLOW_HOSTS)
+
+struct fwdinfo {
+	struct fwdinfo	*next;
+	struct sockaddr_in
+			fwdaddr;
+};
+
+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 */
+			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 */
+#endif
+	u_int8_t	xfers;		/* #/xfers running right now */
+};
+		
+enum transport { primary_trans, secondary_trans, response_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;
+
+typedef struct options {
+	u_int flags;
+	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;
+	enum axfr_format transfer_format;
+	long max_transfer_time_in;
+	struct sockaddr_in query_source;
+	ip_match_list query_acl;
+	ip_match_list transfer_acl;
+	ip_match_list topology;
+	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;
+} *options;
+
+typedef struct key_info {
+	char *name;
+	char *algorithm;
+	char *secret;			/* XXX should be u_char? */
+} *key_info;
+
+typedef struct key_list_element {
+	key_info info;
+	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
+
+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 */
+	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,
+	ns_log_notify,
+	ns_log_cname,
+	ns_log_security,
+	ns_log_os,
+	ns_log_insist,
+	ns_log_maint,
+	ns_log_load,
+	ns_log_resp_checks,
+	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 {
+	char *			token;
+	int			val;
+};
+
+#define NOERROR_NODATA   6	/* only used internally by the server, used for
+				 * -ve $ing non-existence of records. 6 is not 
+				 * a code used as yet anyway. anant@isi.edu
+				 */
+
+#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 BIND_NOTIFY
+typedef enum {
+	notify_info_waitfor, notify_info_delay, notify_info_error,
+	notify_info_done
+} notify_info_state;
+
+typedef struct notify_info {
+	char *name;
+	int class;
+	notify_info_state state;
+	evWaitID wait_id;
+	evTimerID timer_id;
+	LINK(struct notify_info) link;
+} *notify_info;
+
+typedef LIST(struct notify_info) notify_info_list;
+#endif /* BIND_NOTIFY */
+
+#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