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/*
* from ns.h 4.33 (Berkeley) 8/23/90
* $Id: ns_defs.h,v 8.4 1995/12/22 10:20:30 vixie Exp $
*/
/*
* ++Copyright++ 1986
* -
* 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.
* -
* --Copyright--
*/
/*
* 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 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 /* max seconds for an xfer */
#define XFER_TIME_FUDGE 10 /* MAX_XFER_TIME fudge */
#define MAX_XFERS_RUNNING 10 /* default max value of xfers_running */
#define MAX_XFERS_PER_NS 2 /* max # 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 */
#define USE_MINIMUM 0xffffffff
/* sequence-space arithmetic */
#define SEQ_GT(a,b) ((int32_t)((a)-(b)) > 0)
/* wildcard predicate */
#define WILDCARD_P(str) (str[0] == '*' && str[1] == '\0')
/* cheap garbage collection */
#define FREE_ONCE(p) { if (p) { free(p); p = NULL; } }
/* 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 refresh */
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_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 */
#ifdef SECURE_ZONES
struct netinfo *secure_nets; /* list of secure networks for zone */
#endif
#ifdef BIND_NOTIFY
/* XXX - this will have to move to the name when we do !SOA notify */
struct notify *z_notifylist; /* list of servers we should notify */
#endif
};
#ifdef BIND_NOTIFY
struct notify {
struct in_addr addr; /* of server */
time_t last; /* when they asked */
struct notify *next;
/* XXX - this will need a type field when we do !SOA notify */
};
#endif
/* zone types (z_type) */
#define Z_NIL 0 /* zone slot not in use */
#define Z_PRIMARY 1
#define Z_SECONDARY 2
#define Z_CACHE 3
#define Z_STUB 4
/* 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 ALLOW_UPDATES
#define Z_DYNAMIC 0x0400 /* allow dynamic updates */
#define Z_DYNADDONLY 0x0800 /* dynamic mode: add new data only */
#define Z_CHANGED 0x1000 /* zone has changed */
#endif /* ALLOW_UPDATES */
#define Z_XFER_ABORTED 0x2000 /* zone transfer has been aborted */
#define Z_XFER_GONE 0x4000 /* zone transfer process is gone */
/* 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 */
#include <sys/time.h>
/* 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_cmsglen; /* len 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) */
#if defined(LAME_DELEGATION) || defined(VALIDATE)
char q_domain[MAXDNAME]; /* domain for servers we are querying */
#endif
#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_NEXTADDR(qp,n) \
(((qp)->q_fwd == (struct fwdinfo *)0) ? \
&(qp)->q_addr[n].ns_addr : &(qp)->q_fwd->fwdaddr)
#define RETRY_TIMEOUT 45
#define QINFO_NULL ((struct qinfo *)0)
/*
* Return codes from ns_forw:
*/
#define FW_OK 0
#define FW_DUP 1
#define FW_NOSERVER 2
#define FW_SERVFAIL 3
struct qstream {
int s_rfd; /* stream file descriptor */
int s_size; /* expected amount of data to recive */
int s_bufsize; /* amount of data recived in s_buf */
u_char *s_buf; /* buffer of received data */
u_char *s_bufp; /* pointer into s_buf of recived data*/
struct qstream *s_next; /* next stream */
struct sockaddr_in
s_from; /* address query came from */
u_int32_t s_time; /* time stamp of last transaction */
int s_refcnt; /* number of outstanding queries */
u_int16_t s_tempsize; /* temporary for size from net */
};
#define QSTREAM_NULL ((struct qstream *)0)
struct qdatagram {
int dq_dfd; /* datagram file descriptor */
time_t dq_gen; /* generation number */
struct qdatagram
*dq_next; /* next datagram */
struct in_addr dq_addr; /* interface address */
};
#define QDATAGRAM_NULL ((struct qdatagram *)0)
struct netinfo {
struct netinfo *next;
u_int32_t addr;
u_int32_t mask;
struct in_addr my_addr;
};
#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 { nssRcvdQ, /* sent us a query */
nssRcvdR, /* sent us an answer */
nssRcvdIQ, /* sent us an inverse query */
nssRcvdNXD, /* sent us a negative response */
nssRcvdFwdQ, /* sent us a query we had to fwd */
nssRcvdFwdR, /* sent us a response we had to fwd */
nssRcvdDupQ, /* sent us a retry */
nssRcvdDupR, /* sent us an extra answer */
nssRcvdFail, /* sent us a SERVFAIL */
nssRcvdFErr, /* sent us a FORMERR */
nssRcvdErr, /* sent us some other error */
nssRcvdTCP, /* sent us a query using TCP */
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 */
nssSentFwdR, /* fwdd a response to them */
nssSentDupQ, /* sent them a retry */
nssSentFail, /* sent them a SERVFAIL */
nssSentFErr, /* sent them a FORMERR */
nssSendtoErr, /* error in sendto */
#ifdef XSTATS
nssNotNsQ, /* query received from remote port != ns_port */
nssSentNaAns, /* sent them a non autoritative answer */
nssSentNXD, /* sent them a negative response */
#endif
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 */
};
#ifdef NCACHE
#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? */
#endif /*NCACHE*/
#define VQEXPIRY 900 /* a VQ entry expires in 15*60 = 900 seconds */
#ifdef VALIDATE
#define INVALID 0
#define VALID_NO_CACHE 1
#define VALID_CACHE 2
#define MAXNAMECACHE 100
#define MAXVQ 100 /* Max number of elements in TO_Validate queue */
struct _nameaddr {
struct in_addr ns_addr;
char *nsname;
};
typedef struct _nameaddr NAMEADDR;
struct _to_validate {
int16_t class; /* Name Class */
int16_t type; /* RR type */
char *data; /* RR data */
char *dname; /* Name */
time_t time; /* time at which inserted in queue */
struct _to_validate
*next,
*prev;
};
typedef struct _to_validate TO_Validate;
#endif /*VALIDATE*/
#ifdef DEBUG
# define dprintf(lev, args) (ddt && (debug >= lev) && fprintf args)
#else
# define dprintf(lev, args)
#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
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