953 lines
40 KiB
Plaintext
953 lines
40 KiB
Plaintext
@(#)RELEASE_NOTES e07@nikhef.nl (Eric Wassenaar) 961113
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yymmdd Description of changes per release
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TODO Things that still need to be done
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WISHLIST Wishes expressed by various people
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NOTES Important issues to keep in mind
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MISC Miscellaneous reminders
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# ----------------------------------------------------------------------
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# Description of changes per release
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# ----------------------------------------------------------------------
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961113
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Portability fix.
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Trying to include <strings.h> was a bit over-ambitious
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and caused confusion on some platforms.
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On certain platforms PAGESIZE is not a constant, but
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hides a sysconf() call. This precludes initialization
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of static variables in malloc.c
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There are no functional changes in this release.
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961013
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Configurable defaults.
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Make the compiled-in read timeout during stream I/O
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configurable in conf.h. The default value is 60 seconds.
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Make the new default _res.retry and _res.retrans values
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configurable in conf.h. Note that the _res.retrans value
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can be overridden with the -s command line option.
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Minor fixes.
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Guard against possible interrupts during I/O handling.
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961012
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Multiple answers during zone listing.
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Allow multiple resource records per reply buffer packet
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during zone transfers. Currently BIND puts each resource
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record in a seperate reply buffer, but there are other
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implementations which behave differently. Important fix.
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961010
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New resource records and query types.
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Add support for T_NAPTR resource records.
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Define T_EID/T_NIMLOC/T_ATMA resource record types, but
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they have no support yet.
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Minor fixes.
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When comparing domain names in routines indomain() or
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samedomain(), properly handle embedded quoted dots.
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This is just a generalization. Currently these modules
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are used only in those cases where embedded quoted dots
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are not valid.
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Miscellaneous changes.
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Attempt to further reduce lint clutter. It is difficult
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to eliminate this altogether. There are too many subtle
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differences between various platforms.
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960929
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New resource records and query types.
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Define the new IXFR type as per RFC 1995. No support
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for this yet, however.
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Add support for T_KEY and T_SIG resource records.
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These require some new utility functions.
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Recognize T_NXT and T_SRV which still have draft status.
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Extra safety checks.
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After a positive return from an ordinary gethostbyname
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or gethostbyaddr we cannot be absolutely sure that the
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size of the canonical h_name is within bounds.
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Note that this is guaranteed by host's internal modules.
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Minor fixes.
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Be more restrictive with respect to wildcard checking.
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Make sure it is really specified as the first label.
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Construct reverse in-addr.arpa name without trailing dot
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if we know that this is already an absolute name.
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Miscellaneous changes.
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Print also the input name we are going to hostalias().
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Rename a few variables for better readability.
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Add various definitions that might be missing in the
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default include files on some weird platforms.
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Use a configurable limit for the number of recursive
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chain lookups.
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Some cleanup to avoid lint warnings on some platforms.
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Revised manual page.
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Some items needed an update.
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Extend the list of related RFCs.
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Several layout changes, suggested by Greg Woods.
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960921
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Extend functionality of -A option.
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If the -A flag is specified along with any explicit
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list mode option, it not only enables reversed address
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checking, it also enables those special checks that are
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normally suppressed during recursive listings, such as
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checks for canonical host names and invalid underscores.
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Revise -p option plus explicit server.
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Consider the set of NS servers gotten from an explicit
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server as authoritative if the -p option is also given.
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This affects whether or not to print lame delegation
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warnings in case the SOA record could not be retrieved.
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Suppress lame delegation warnings in case the A records
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for NS servers could not be retrieved and an explicit
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server is specified. The latter was an oversight.
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Indicated by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>
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Improve error reporting.
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After a negative return from an ordinary gethostbyname
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or gethostbyaddr we don't know whether or not the answer
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was authoritative. Perform an extra lookup in some few
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cases where we really want to distinguish between them.
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This is kludgy, and needs improvement.
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Revise additional checking during RR printout.
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This prevents possible recursive loops in some cases.
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Requires adapting the way state information is passed
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via print_info() and print_rrec().
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Make query section consistency checks.
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When retrieving certain crucial information, such as
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SOA or NS records, make sure the qdcount is exactly one
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as it should be.
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The values in the query section in a reply should match
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those in the original query. This is already enforced
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by the BIND 4.9 res_send(). An error is reported when a
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mismatch is detected, but results are processed anyway.
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Make sure response comes from a known server.
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When using datagrams, compare the source address of the
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response to the list of known servers. Ignore the answer
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if there is a mismatch. Was missing for HOST_RES_SEND.
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Minor bug fixes.
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When retrieving SOA records, make sure they belong to
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the requested domain.
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Must properly set h_errno in some obscure circumstances.
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Miscellaneous changes.
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Clear the entire sockaddr_in before filling in the
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relevant entries. Some platforms seem to rely on
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sin_zero being actually zero.
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960808
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Conform to BIND 4.9.5 interpretation of TXT strings.
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When multiple strings are encoded, they are now treated
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and printed as individual quoted strings, separated by
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whitespace. Formerly, they were concatenated and printed
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as one single quoted string.
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Note that this interpretation makes the TXT data field
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multi-valued, and precludes the use of strings that are
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longer than 255 characters.
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960512
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Allocate list of host data dynamically.
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This avoids the MAXHOSTS static limit, and keeps the
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initial BSS of the executable to a reasonable size.
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Mentioned by Greg Woods <woods@most.weird.com>
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The list will be expanded in chunks as needed during
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zone transfers, but will not shrink again.
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Escape special characters within quoted strings.
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Data fields of TXT/HINFO/UINFO records are printed as
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quoted strings. Some special embedded characters should
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be backslash-escaped in the output format.
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Properly handle tcp packet overflow.
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If the supplied answer buffer space is insufficient to
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store the entire answer, res_send() is supposed to
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return the length of the entire untruncated answer, not
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the number of bytes that are actually available.
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Increase MAXPACKET packet buffer size.
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This is now set to the maximum value used internally
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by the BIND named. The same value is used by dig.
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Although still static, it should be sufficient.
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Miscellaneous changes.
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Show the length of the received answer in various debug
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messages. This gives some insight in case of truncation.
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960417
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Rudimentary support for AAAA RR.
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Just decode and print the ip v6 address during regular
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RR type processing, in the most straightforward way.
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No provisions for reverse lookups yet.
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Increase MAXPACKET packet buffer size.
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The traditional value 1024 for the (tcp) packet size is
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no longer sufficient (see moderators.uu.net MX records).
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Miscellaneous changes.
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In verbose mode, show the number of bytes in the answer
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if it exceeds the (udp) packet size PACKETSZ (512), or
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in case the answer is truncated. Print the truncation
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indication at a more appropriate position.
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951231
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Cosmetic changes.
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Print all relevant messages in debug mode to stdout,
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and appropriately prefix them with ";; " to conform
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with the BIND 4.9.3 conventions.
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Miscellaneous changes.
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Consider the all-ones broadcast address a fake address.
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951024
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Avoid potential alignment conflicts.
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Allocate socket addresses of type struct sockaddr_in
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instead of type struct sockaddr. The first one has
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stricter alignment restrictions, although they have
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the same size.
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Correct various misspellings.
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Noted by Keith Bostic <bostic@bsdi.com>
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950925
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Portability fix.
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Refine type definitions for the arguments to various
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resolver routines to be even more backward compatible,
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and to avoid compilation or lint warning messages on
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new platforms. It should run clean on BSD44 systems.
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There are no functional changes in this release.
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950923
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Add new -z option to list delegated zones in a zone.
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This is a new variant of the zone listing specials.
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A zone transfer is done, and only the names of the
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encountered delegated zones are printed.
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This option is undocumented, and subject to change.
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Sort list of delegated zones alphabetically.
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Before acting on delegated zones during zone listings,
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sort them in alphabetical order for prettier output.
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Portability fix.
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The BIND 4.9.3 resolver routines require the passed
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buffer arguments to be of type u_char instead of char.
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This causes a prototype mismatch for HOST_RES_SEND.
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Mentioned by Geert Jan de Groot <geertj@ripe.net>
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Minor command option functionality change.
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The -L flag, when given without any other list mode
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option, now implies the -l option.
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Miscellaneous code cleanup.
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Pass the name of the actually contacted server during
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zone listings in more elegant way.
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Avoid (harmless) lint warnings on picky platforms.
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950822
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Fix bug in recursive lookup handling.
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During recursive lookups, e.g. when following CNAME
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chains, querynames are always assumed to be already
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fully qualified, and must be tried ``as is''.
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The classical example of a CNAME that points to the
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pseudo "localhost.", or an erroneously dot-terminated
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single name, should not be subject to local aliasing
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or search list processing. They were.
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Reported by Alexander Dupuy <dupuy@smarts.com>
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950809
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Portability fix.
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Check for SVR4 as well as for SYSV in port.h, which is
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necessary for compilation via the master BIND Makefile.
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Suggested by <Piete.Brooks@cl.cam.ac.uk>
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There are no functional changes in this release.
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950502
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Maintain hash list for zone name lookups.
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This should not be really necessary for most practical
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purposes, but it makes processing of the .in-addr.arpa
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zone and even the .COM zone at least feasible.
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The latter still requires quite a lot of memory, and
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some cpu time to filter out the glue records from its
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50000 A records and 110000 NS records.
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The toplevel zone count as of today is:
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COM 50000 delegated zones
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IN-ADDR.ARPA 30000 delegated zones
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ORG 5000 delegated zones
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NET 3000 delegated zones
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EDU 2000 delegated zones
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Suppress various checks in quiet mode.
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This avoids costly checks and achieves some speedup
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in cases that nothing would have been printed anyway.
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Supply alternative recv_sock() module.
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The select() system call may fail on the solaris 2.4
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platform without appropriate patches. An alarm can be
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used instead, at the cost of extra system call overhead.
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950429
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Fix bug in error reporting.
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The name and address of the contacted server during
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zone listings could be clobbered by intermediate
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calls to res_send().
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950427
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Fix glitch in host name lookup.
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New entry would be inadvertently added to the hash
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list in case the MAXHOSTS limit was reached.
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Miscellaneous changes.
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Speedup comparison of zone names and host names by
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looking up zone names in the host name hash list.
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950407
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Maintain hash list for host name lookups.
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A linear search through the per-zone host name table
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becomes very costly for zones with several thousands
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of hosts. Significant speedup is achieved.
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Even for recursive listings of many small zones the
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reduction of total processing time is noticeable.
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950318
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Increase (static) maximum number of hosts.
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This avoids imposing arbitrary limits in most cases.
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950302
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Prevent zone transfer for certain zones.
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Some zones are known to contain bogus information.
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E.g. definition of A records for all possible addresses
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in a class-B network will bias the hostcount.
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Add new -N option to define an explicit list of zones
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for which a zone transfer is deliberately skipped.
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Requested by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>
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Miscellaneous code cleanup.
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Split off various tasks from monolithic list_zone().
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Invert the double matching loop in sort_servers().
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Fix glitch when comparing matching domain labels.
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950115
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Sort list of nameservers for a zone.
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When the NS records for a zone are issued in BIND 4.9
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round-robin fashion, this may yield an unfavorable
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order for doing zone transfers. Apply some heuristic
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to sort them according to preference, giving priority
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to servers within your own domain or parent domains.
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Add new option -P to define an explicit list of domains
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of preferred servers, giving priority to matching ones.
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Suggested by Marten Terpstra <marten@ripe.net>
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Don't suppress certain rr data any more.
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The preference value in the MX/RT/PX records and the
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version number in the AFSDB record was suppressed in
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non-verbose mode, unless the -T option was specified.
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These values are now printed by default.
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Requested by Geert Jan de Groot <geertj@ripe.net>
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941210
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Adapt implementation of LOC RR.
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The binary data format has already changed twice:
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the four 4-bit fields are now four 8-bit fields,
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and log2 encoding has changed to power-of-10 encoding.
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Support for this will be incorporated in BIND 4.9.3.
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Still undocumented in the host manual page.
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941206
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Compatibility with BIND 4.9.3.
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The NOCHANGE query response has now been conditionally
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defined via #ifdef ALLOW_UPDATES. Older versions of
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BIND may still return this (should have been FORMERR).
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Improve error reporting.
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Define a special h_errno status SERVER_FAILURE for the
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case a SERVFAIL query response is returned. This is
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used to report lame delegations during SOA checking
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or zone transfers. Servers may return this code when
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the zone data has expired altogether. This is not a
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TRY_AGAIN situation if such server is authoritative.
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Suggested by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>
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Rename special status NOT_AVAILABLE to QUERY_REFUSED.
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Various minor changes.
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Check for invalid characters in T_AAAA record names.
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Print optional protocol and port from T_A record
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after a comment sign. Not sure whether this has ever
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been used.
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941129
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Implement LOC RR as defined by preliminary draft-RFC.
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Requires conversion routines for spherical position,
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vertical position, and precision.
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Tested on big-endian, little-endian, Alpha, Cray.
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This is only a pre-release.
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Undocumented until RFC gets public.
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941125
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Recognize new RR types as reserved by RFC 1700.
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Implement PX RR type as defined per RFC 1664.
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Implement GPOS RR type as defined per RFC 1712.
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Include few simple utility scripts.
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These are just examples of wrappers to host.
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nslookup -- emulate most functions of the real one.
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mxlookup -- lookup records at each of its servers.
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941006
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Lessen restrictions for certain tests.
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The checks for invalid underscores and canonical host
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names were suppressed during recursive zone listings
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on all levels. They are now suppressed only when not
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operating on the base level. This enables the checks
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during the ``host -C -L 1'' command.
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Extend functionality of -A option.
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If the -A flag is specified along with any explicit
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list mode option, it enables reversed address checking.
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The address of each encountered A record is reverse
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mapped, and it is checked whether it is registered and
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maps back to the A record name. This flag can safely
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be specified in the ``host -CA -L 1'' command.
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Add new -W option to list wildcard records in a zone.
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This is a new variant of the zone listing specials.
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A zone transfer is done, and only wildcard records
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are printed. The default resource record type is MX.
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This option is undocumented, and subject to change.
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941004
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Improve printout.
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Include conversion of the various time values from the
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SOA record in the comment part during ordinary printout.
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941002
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Call alternative res_debug print routine if available.
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In BIND 4.9.* an alternative module is present which
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accepts (as it should) the size of the query buffer.
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Rearrange include files.
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Move configuration definitions to new conf.h.
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940917
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Improve support for NSAP records, as per RFC 1637.
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Print ordinary NSAP addresses with separating dots,
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after the 1-byte AFI, then after every 2 bytes.
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Add new option -n to generate reverse NSAP within the
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nsap.int domain, similar to the -i option.
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Print reverse NSAP in forward notation, unless forced
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to print full zone file format.
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940911
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Verify that some host names are canonical.
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This is formally required, but also in practice highly
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desirable. The target hosts in NS and MX records only
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are verified, being the most crucial.
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Currently the test is skipped during recursive zone
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processing, to avoid excessive output of non-canonical
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MX targets.
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When figuring out the nameservers for a zone before
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doing a zone transfer, a non-canonical nameserver name
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is always reported.
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Report illegal domain names.
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This is now done by default for 'host' related domain
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names. The A and MX record names and NS and MX target
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names are checked only.
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Only alphanumeric characters and hyphen '-' are valid.
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Currently the reporting of names containing underscores
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is suppressed during recursive zone listings, to avoid
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excessive output of such illegal host names.
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During SOA checking, an illegal primary or hostmaster
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is always reported.
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Document the -I option.
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This option does no longer trigger the checking of
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invalid characters in names.
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To suppress illegal underscore messages, use "-I _".
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To show them during recursive listings, use "-I ''".
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Modify various messages.
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Make some warning messages slightly shorter, and start
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the message with the resource record or zone name.
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Most of the SOA check messages have been affected.
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Remove the answer buf offset in the incomplete HINFO
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warning messages.
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Improve error reporting.
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Include the name of an explicit server in ns_error()
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messages describing h_errno. This was already done
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for the errno messages.
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Include the server name also in ns_error() messages
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after a failing zone transfer from that server.
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Define a special h_errno status NOT_AVAILABLE for the
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case a query was explicitly refused. Some servers are
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configured to refuse zone transfers.
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Major update of manual page.
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Explain some more failure messages.
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Explain most of the common warning and error messages.
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940819
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Modify various messages.
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Include the server name in messages reporting failures
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and problems during zone transfers.
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Implement ttl consistency checks.
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Multiple records of same name/type/class should have the
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same ttl value in zone listings. This is now checked.
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A suitable hash function is needed to minimize overhead.
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The approach is similar to the function used in sendmail.
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This has been a long standing wish from
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Peter Koch <pk@TechFak.Uni-Bielefeld.DE>
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Various speedup fixes.
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Avoid unnecessary indomain() calls during zone listings.
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940713
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Modify various messages.
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Replace some of the ``extraneous'' messages with a more
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descriptive text. Include name and type of the query in
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messages reporting format errors in the response.
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Include zone name in error messages during SOA check.
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Revise check for valid names.
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If a domain name refers to a ``mailbox'', the part up to
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the first unquoted dot is the ``local part'' to which
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the RFC 822 syntax rules apply.
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940623
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Revise res_send() strategy.
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Mark bad server status for certain conditions which make
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it unlikely that we will succeed during the next try.
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Operating system failures are not in this category.
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Nameserver unreachable status is now reported in a more
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reliable fashion. A second try would sometimes timeout.
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(May be useful for monitoring the upcoming summer 1994
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reshuffling of EBONE/EuropaNET/NSFnet interconnections).
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Facelift for socket I/O routines.
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Systematically use _res_close() to close a connection.
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|
Include the answer packet length in debug printout.
|
|
Extend resolver initialization.
|
|
Set initial query ID to some arbitrary number.
|
|
Various speedup fixes.
|
|
Avoid unnecessary strlen() calls during zone listings.
|
|
Check whether the resource record data must be printed
|
|
outside the print routine to avoid unnecessary overhead.
|
|
Use bcopy() instead of sprintf() in obvious cases.
|
|
Better output format control.
|
|
In non-verbose and non-debug mode, only pure resource
|
|
record output is written to stdout.
|
|
Add new -Z option to force resource record output to be
|
|
in full zone listing format, including trailing dot in
|
|
domain names, plus ttl value and class indicator.
|
|
Rearrange include files.
|
|
Define resource record structures in rrec.h.
|
|
Function declarations moved to defs.h.
|
|
|
|
940615
|
|
Various portability changes.
|
|
Avoid use of sizeof() for all entities that have a fixed
|
|
field width, and use predefined constants instead. This
|
|
is necessary for systems without 16 or 32 bit integers.
|
|
Fix use of ipaddr_t and struct in_addr appropriately.
|
|
All this makes the utility portable to e.g. Cray.
|
|
Save and restore state during recursive lookup.
|
|
Error codes could be clobbered during MAILB tracing.
|
|
Miscellaneous minor code cleanup.
|
|
|
|
940603
|
|
Fix implementation for -F option properly.
|
|
Exchanging the role of stdout and the logfile now works
|
|
on all platforms. Asked by Artur Romao <artur@dns.pt>
|
|
|
|
940526
|
|
Combine explicit server and -p option.
|
|
If both are specified, the explicit server is contacted
|
|
to retrieve the desired servers for the given zone
|
|
during zone listing/checking modes. This is useful for
|
|
checking zones that have not been registered yet.
|
|
Requested by Geert Jan de Groot <geertj@ripe.net>
|
|
Rudimentary support for NSAP records.
|
|
This is still very experimental. It is unclear how an
|
|
NSAP address should be encoded in the resource record,
|
|
and how its hierarchical structure is decided.
|
|
Inspired by the 4.9 diffs from cisco.com.
|
|
|
|
940317
|
|
Print SOA serial always as an unsigned value.
|
|
Warn about ``extraordinary'' serial if high bit is set.
|
|
Reset errno to avoid stale values.
|
|
Could happen when doing multiple gethostbyaddr() calls
|
|
in extended mode when the BIND res_send() is linked in.
|
|
Problem noted by <Piete.Brooks@cl.cam.ac.uk>
|
|
Solaris portability fix.
|
|
For solaris 2.x use res_gethostby{addr,name} modules
|
|
to force dns lookups. The __switch_gethostby{addr,name}
|
|
modules have disappeared in solaris 2.3.
|
|
|
|
930926
|
|
Extend -I option with argument containing allowed chars.
|
|
This string specifies formally illegal, but silently
|
|
allowed characters when checking illegal domain names.
|
|
The -I option is still necessary to enable checking.
|
|
Still done only for resource record names in listings.
|
|
Note that some hesiod names contain the '/' character.
|
|
Indicated by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Additional SOA record checks.
|
|
Check hostmaster field for illegal chars, such as '@'
|
|
(needed as long as data field names are not checked).
|
|
Revised SOA record checks.
|
|
Check primary field against list of known nameservers.
|
|
Issue warning if not among the authoritative servers.
|
|
This may be intentional in special cases, however.
|
|
Required some code reshuffling.
|
|
Add new -M option to list mailable subdomains in a zone.
|
|
This is a new variant of the zone listing specials.
|
|
A zone transfer is done (without listing anything by
|
|
default) to determine the available delegated zones.
|
|
For each of these zones, the MX records are printed.
|
|
Experimental, undocumented. Insufficient too: you
|
|
really want to see also the domains for which only
|
|
an MX record exist.
|
|
Cleanup terminology in the code documentation.
|
|
Remove the word 'subdomain' and cleanup the confusion
|
|
between 'domain' versus 'zone'.
|
|
Update manual page.
|
|
Use terminology that is technically more correct.
|
|
Explain various things that were still missing.
|
|
|
|
930919
|
|
Print actual name that was queried in error messages.
|
|
Formerly, only the (possibly abbreviated) queryname
|
|
as specified on the command line was printed.
|
|
Special care must be given if domain search is enabled,
|
|
especially in the enforced BIND compatibility mode.
|
|
Looks much better. Asked by <Piete.Brooks@cl.cam.ac.uk>
|
|
Some more SOA record tests.
|
|
Some records have the name of the zone specified in the
|
|
field that should contain the name of the primary server.
|
|
Miscellaneous minor changes.
|
|
Slightly modify the nameserver name printout during -C.
|
|
Set proper h_errno when answer buffer counts are corrupt.
|
|
Add new -V option to print version number.
|
|
Define version in separate vers.c
|
|
Use class mnemonics as defined in RFC 1035.
|
|
Print 'CH' instead of 'CHAOS'. Anyone using this ?
|
|
Recognize obsolete 'CS' or 'CSNET'. Pretty useless.
|
|
Just for ultimate completeness.
|
|
Check for invalid characters in domain names.
|
|
Only alphanumeric characters and hyphen '-' are valid.
|
|
Unfortunately, the use of underscore '_' is widespread,
|
|
so issuing a warning by default is unrealistic. Therefore:
|
|
Add new -I option to warn about illegal domain names.
|
|
Currently done only for resource record names during zone
|
|
listing. Could be extended to domain names in data fields.
|
|
Perhaps a warning by default in case illegal other than
|
|
underscore. Option is still undocumented as the semantics
|
|
are subject to change.
|
|
|
|
930915
|
|
Add -R option to always first try search domains.
|
|
Normally querynames are assumed to be fully qualified
|
|
and are tried as such, unless it is a single name which
|
|
is always tried, and only once, in the default domain.
|
|
This option sets RES_DNSRCH and simulates the default
|
|
BIND behavior, with the exception that NO_DATA status
|
|
terminates the search immediately.
|
|
With the additional otherwise undocumented -B option the
|
|
BIND behavior is fully enforced and the search continues.
|
|
Added only for testing purposes, not for general use.
|
|
Few more BIND 4.9 compatibility changes.
|
|
Some resolver routines have gotten new argument types.
|
|
Adapt Makefile to BIND conventions.
|
|
The Makefile can be used completely stand-alone,
|
|
or can be invoked from the master BIND Makefile.
|
|
Affects names of various (inherited) make variables.
|
|
Change BIND_RES_SEND to HOST_RES_SEND with opposite
|
|
meaning. Default is HOST_RES_SEND in case stand-alone.
|
|
|
|
930911
|
|
Extension of user interface.
|
|
Allow multiple arguments on command line or from stdin.
|
|
Requires new syntax for specifying explicit server.
|
|
New options -x and '-X server' indicate extended syntax.
|
|
Quite a lot reshuffling of code. Urgently requested by
|
|
<Piete.Brooks@cl.cam.ac.uk> and Paul Vixie <paul@vix.com>
|
|
Configurable default options.
|
|
Use an environment variable HOST_DEFAULTS to pre-define
|
|
default options and parameters. These are interpolated
|
|
in front of the command line arguments before scanning.
|
|
Syntax is the same as the command line syntax.
|
|
Fix bug when querying single name without dot.
|
|
Not only the default domain, but also the eventual other
|
|
search domains would be tried, although DNSRCH is off.
|
|
This is a long-standing bug. Very important fix.
|
|
|
|
930908
|
|
Various declaration changes for portability.
|
|
Print TXT/HINFO/UINFO strings within double quotes.
|
|
It is done both in regular and zone listing output.
|
|
This is conforming the syntax for zone input files.
|
|
Add trailing dot to domain names in zone listing.
|
|
This is conforming the syntax for zone input files.
|
|
The trailing dot is not added in regular output.
|
|
Define exit codes in new exit.h header file.
|
|
This avoids the need to include /usr/ucbinclude when
|
|
running in non-BSD mode on solaris 2.x platforms.
|
|
Attempt to diagnose lame delegations.
|
|
Error messages about lame delegations are given during
|
|
zone listings and when checking SOA records (but only when
|
|
the contacted servers are supposed to be authoritative).
|
|
Also in case servers from NS records turn out not to exist.
|
|
This may need some refinement for special cases.
|
|
Perform some extra checks during zone listings.
|
|
Check for unexpected error status in packets. Only the
|
|
very first packet in response to a transfer query can
|
|
have an error status.
|
|
Issue warning if only a single nameserver found.
|
|
Not an error per se, but not much redundancy then.
|
|
Suggested by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Check for anomalous empty zone transfers.
|
|
Transfers consisting of only SOA records could occur if
|
|
we queried the victim of a lame delegation which happened
|
|
to have the SOA record present. Fake an error that will
|
|
result in a lame delegation message.
|
|
Mentioned by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Indicate list/check failure/success via exit code.
|
|
Failure status is returned in case any error has been
|
|
reported via errmsg or pr_error (not pr_warning).
|
|
For Ruediger Volk <rv@deins.informatik.uni-dortmund.de>
|
|
Add -o option to suppress rr output to stdout.
|
|
Can be used in combination with -f to separate rr output
|
|
from verbose comments and error output.
|
|
Perform some SOA timer consistency checks.
|
|
Check timer values for anomalies, such as (retry > refresh)
|
|
or (refresh + retry > expire).
|
|
Suggested by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Also compare all values instead of just serial.
|
|
More accurate reporting of zones processed.
|
|
Print total number of successful zone transfers versus the
|
|
number of attempted transfers. Print count of zones which
|
|
were successfully processed (transferred or -C checked)
|
|
versus the number of zones requested to be processed.
|
|
From this we can deduce the number of transfers that failed
|
|
and the number of times we couldn't find any nameservers.
|
|
|
|
930901
|
|
Increase MAXNSNAME from 12 to 16.
|
|
This is conforming NSMAX in ns.h
|
|
Don't accumulate statistics if not necessary.
|
|
Skip the costly host count scan in case nothing would
|
|
be reported at all according to the command line options.
|
|
Add some extra checks during zone listings.
|
|
Check for invalid nonzero nscount and arcount.
|
|
Special handling for non-authoritative answers.
|
|
We had already NO_RREC for non-authoritative NO_DATA, but
|
|
non-authoritative HOST_NOT_FOUND would yield TRY_AGAIN.
|
|
Change this to NO_HOST to issue a separate error message.
|
|
This identifies some special cases, e.g. queries for a
|
|
non-existing name using class C_ANY when the nameserver
|
|
is authoritative only for one specific class.
|
|
Use TRY_AGAIN in both cases during zone listing errors.
|
|
Minor declaration changes for portability.
|
|
Add -F option to exchange role of stdout and logfile.
|
|
The '-F file' is the same as '-f file' but all stdout
|
|
output goes to the logfile, and stdout only gets the extra
|
|
resource record output (so that it can be used in pipes).
|
|
Implementation is inherently unportable. Supported only on
|
|
a few platforms where it happens to work.
|
|
Explain status messages in the manual page.
|
|
Include address and name of server in perror messages.
|
|
This gives a lot more information in case stderr and stdout
|
|
are differently redirected.
|
|
|
|
930830
|
|
Make error checking in some routines uniform.
|
|
Miscellaneous declaration changes.
|
|
Filter resource record class appropriately.
|
|
In zone listings records of different class can show up,
|
|
e.g. HS records are mixed with IN records. Only records
|
|
of the requested class should be processed. This fixes
|
|
problems with recursive zone traversals and inaccurate
|
|
statistics. Pointed out by <Yves.Devillers@inria.fr>
|
|
and <Piet.Beertema@EU.net>. Important fix.
|
|
Include record class, if special, in some output.
|
|
Show the class if it is not the default IN class.
|
|
Include address of duplicate hosts in message.
|
|
This may help to locate the problem.
|
|
Properly concatenate long TXT strings that are split.
|
|
Long TXT strings (>255) are split as of BIND 4.8.3.
|
|
They were displayed incorrectly with TAB separators.
|
|
Problem noted by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Cleanup some DNS terminology in output messages.
|
|
Fix some confusion between '(sub)domain' and 'zone'. Only
|
|
done in the output of host, not yet in the documentation.
|
|
Pointed out by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Implement host address list as hashed list.
|
|
The linear list is replaced with a hashed list, using the
|
|
low-order address bits as the key. This may dramatically
|
|
speed up recursive zone listings. Very important fix.
|
|
Suggested by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
Miscellaneous portability hooks.
|
|
Add new port.h header file.
|
|
Change u_long to u_int for resource record fields.
|
|
These are fixed 32-bit quantities.
|
|
Note that BIND 4.9 uses u_int32_t for these, but still uses
|
|
(inconsistently) u_short instead of u_int16_t.
|
|
Necessary for port to alpha and BIND 4.9.
|
|
Change u_long to ipaddr_t for 32-bit address fields.
|
|
For the time being, make this identical to u_long for non-
|
|
alpha machines with pre-BIND 4.9 to avoid lint warnings.
|
|
Note that BIND 4.9 uses u_int32_t for these.
|
|
Necessary for port to alpha and BIND 4.9.
|
|
Introduce new typedef for 'struct state'.
|
|
Necessary for BIND 4.9.
|
|
Make all arguments to vararg routines same type.
|
|
No more mixing of arbitrary pointers and ints. Only number
|
|
of arguments is variable. Requires few silly interfaces.
|
|
Necessary for port to alpha.
|
|
Add the RELEASE_NOTES file to explain changes.
|
|
|
|
930209
|
|
Lookup server name with default resolver values.
|
|
Check SOA records without nameserver recursion.
|
|
Implement new RR types from RFC 1183 and 1348.
|
|
|
|
921005
|
|
Anticipate ultrix specific resolv.h
|
|
Miscellaneous declaration changes.
|
|
Some reshuffling of code.
|
|
|
|
920702
|
|
Recognize alternative program call names.
|
|
Distinguish between auth and non-auth NO_DATA.
|
|
|
|
920624
|
|
Lookup server name before changing nameserver address.
|
|
Handle possible truncation in zone transfers.
|
|
Provide private simplified version of res_send().
|
|
Add -u option to force virtual circuit connections.
|
|
Move all socket I/O routines to separate send.c.
|
|
|
|
920616
|
|
Allocate list of zonenames dynamically, not statically.
|
|
Move and slightly modify the test for fake hosts.
|
|
Suppress host count statistics during inverse listing.
|
|
Miscellaneous documentation updates.
|
|
|
|
920315
|
|
Improve counting of hosts within domain.
|
|
Discard glue records not directly within domain.
|
|
Keep track of hosts with duplicate address.
|
|
Add -D option to list duplicate hosts.
|
|
Add -E option to list extrazone hosts.
|
|
Miscellaneous casting and typing cleanup.
|
|
Increase (static) number of possible subdomains.
|
|
|
|
911201
|
|
Option -T also prints MX preference value.
|
|
Save name of longest hostname found (just for fun).
|
|
Undocumented option -g to select long names (fun).
|
|
|
|
911010
|
|
Don't recurse on cnames if querytype is cname.
|
|
|
|
910923
|
|
Count gateway hosts (with multiple addresses).
|
|
Add -G option to list gateway hosts.
|
|
|
|
910905
|
|
Improve counting of hosts within domain.
|
|
Allow hosts not directly within domain.
|
|
Increase (static) maximum number of hosts.
|
|
|
|
910415
|
|
Improve finding of subdomain names.
|
|
Allow subdomains not directly within domain.
|
|
Check for unauthoritative glue records.
|
|
Add -T option to print ttl when non-verbose.
|
|
Improve connect timeout handling.
|
|
Improve dotted quad parsing.
|
|
Minimum ttl is now called default ttl.
|
|
|
|
910129
|
|
Maintain count of hosts during domain listings.
|
|
Check for hosts with same name as subdomain.
|
|
Add -H option for special host count mode.
|
|
Recognize obsolete T_MAILA.
|
|
|
|
# ----------------------------------------------------------------------
|
|
# TODO
|
|
# ----------------------------------------------------------------------
|
|
|
|
Enhance reverse mapping.
|
|
The new BIND 4.9.* gethostbyaddr() can be configured
|
|
to return host aliases in case multiple PTR records
|
|
were encountered during the reverse lookup.
|
|
It is unclear what the official host name should be.
|
|
Should perhaps abandon the idea of official host name.
|
|
However, the PTR records are still exempt from the new
|
|
round-robin scheduling, and are returned in the order
|
|
in which they are defined in the zone file.
|
|
|
|
Enhance error reporting.
|
|
After a negative return from gethostbyname/gethostbyaddr
|
|
we want to know whether the answer was authoritative or
|
|
not. In a few places we are able to find out, but this
|
|
is a kludge and needs to be reimplemented.
|
|
|
|
# ----------------------------------------------------------------------
|
|
# WISHLIST
|
|
# ----------------------------------------------------------------------
|
|
|
|
Skip printing of second SOA in zone listing.
|
|
Asked by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
|
|
# ----------------------------------------------------------------------
|
|
# NOTES
|
|
# ----------------------------------------------------------------------
|
|
|
|
Include files and resolver library.
|
|
If you are linking this utility with an explicit resolver
|
|
library, make sure you will be compiling with the same
|
|
include files that were used to build the resolver library.
|
|
The BIND 4.9 include file <resolv.h> is incompatible with
|
|
the BIND 4.8 version. This utility can handle both versions,
|
|
but you cannot link with an 4.9 library after compilation
|
|
with the 4.8 include files, and vice versa.
|
|
|
|
Old resolver libraries.
|
|
The res_mkquery() routine in the SUN-supplied resolver
|
|
library on SunOS <= 4.1.3 adds the default domain to given
|
|
single names if REF_DEFNAMES is set. This is not correct and
|
|
leads to undesired results if you query about toplevel domains.
|
|
It may be a pre-BIND 4.8.2 problem.
|
|
The same behavior is reported in the default ultrix resolver.
|
|
This will not be fixed in host. The documentation states that
|
|
you need BIND 4.8.2 or higher.
|
|
Problem noted by Peter Koch <pk@TechFak.Uni-Bielefeld.DE>.
|
|
|
|
Vendor-specific resolver libraries.
|
|
Some vendors supply resolver libraries with configurable
|
|
lookup strategies for gethostbyname/gethostbyaddr, e.g. to
|
|
consult DNS, NIS, /etc/hosts, or other databases, in specific
|
|
order. Such libraries are to be avoided when linking host.
|
|
It is meant to query the DNS and DNS only.
|
|
|
|
SUN's resolver library on solaris 2.x
|
|
If you are on solaris 2.x and you don't have a proper BIND
|
|
resolver library to link with, but have to use the broken
|
|
default library, you can define NO_YP_LOOKUP in the Makefile
|
|
to prevent gethostbyname/gethostbyaddr querying the YP/NIS.
|
|
SUN will probably implement BIND 4.9.3 after its release.
|
|
|
|
Multiple answers during zone listing.
|
|
During zone transfers BIND encapsulates every resource
|
|
record in a seperate reply buffer containing a HEADER
|
|
and an answer section (ancount == 1). The authority and
|
|
additional section are empty. The query section is also
|
|
empty except in the very first reply buffer.
|
|
Some non-BIND implementations may send multiple answers
|
|
per reply buffer (ancount > 1).
|
|
|
|
# ----------------------------------------------------------------------
|
|
# MISC
|
|
# ----------------------------------------------------------------------
|
|
|
|
Port to DEC/Alpha with OSF/1.
|
|
Requested by various people.
|
|
This requires basically two adaptations:
|
|
- sizeof(u_long) is 64 bits instead of 32 bits.
|
|
Affects ip address fields and some fixed fields in the
|
|
nameserver query/answer buffers.
|
|
- pointers in C subroutine arguments are 64 bit quantities.
|
|
Affects the varargs modules.
|
|
Suggestions by Dietrich Wiegandt <dietrich@dxcern.cern.ch>
|
|
and David Cherkus <cherkus@zk3.dec.com>.
|
|
|
|
Compatibility with BIND 4.9.
|
|
Don't use the u_long types any more.
|
|
The 'struct state' is now 'struct __res_state'.
|
|
New resolver library has various hooks for 'dig'.
|
|
New resolver library prints to stdout with leading ";" but
|
|
unfortunately not everywhere. It prints to stderr sometimes
|
|
also with ";" but does not so in the perror() messages.
|
|
(Things have been corrected in BIND 4.9.3).
|
|
BIND 4.9 prints FQDN with trailing dot.
|
|
BIND 4.9 prints TXT strings within double quotes.
|
|
|
|
New features of BIND 4.9.3.
|
|
Don't use sizeof() for u_int, u_short, struct in_addr, and
|
|
HEADER, but use predefined constants for entities that have
|
|
a fixed field width.
|
|
A new parameter _res.ndots has been defined.
|
|
The res_search() module may query the given name ``as_is''.
|
|
The res_search() module retries after SERVFAIL.
|
|
The res_send() module marks a bad server status for almost
|
|
every error condition.
|
|
Extra checks are carried out to ensure that a reply packet
|
|
really is the answer to a query: nameserver addresses and
|
|
query fields are compared.
|
|
|