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Diffstat (limited to 'contrib/bind/named/ns_defs.h')
| -rw-r--r-- | contrib/bind/named/ns_defs.h | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/contrib/bind/named/ns_defs.h b/contrib/bind/named/ns_defs.h new file mode 100644 index 000000000000..6bd10e543b96 --- /dev/null +++ b/contrib/bind/named/ns_defs.h @@ -0,0 +1,397 @@ +/* + * from ns.h 4.33 (Berkeley) 8/23/90 + * $Id: ns_defs.h,v 8.6 1996/05/17 09:10:46 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) + + /* 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 { 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 */ +#ifdef XSTATS + 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 */ +#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 + |