/* * 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 /* 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