Version 10b (3-OCT-2004)
------------------------

- the "mtu" parameter in TBF is now optional
- tcsim now uses KVERSION[NUM] instead of KFULLVERSION[NUM] to avoid breaking
  if EXTRAVERSION contains multiple dots or other surprises (reported by
  Eduardo Grosclaude)
- scripts/runtests.sh now runs commands with LANG=C, to avoid localized error
  messages (reported by Eduardo Grosclaude)

Version 10a (28-SEP-2004)
-------------------------

- configure is compatible with 2.4.27
- updated kernel version example in README from 2.4.26 to 2.4.27
- scripts/compatibility.sh: added 2.4.27
- changed name of "tcc" to "tcng", for collision with "tiny cc" (reported by
  Matthias Urlichs)
- scripts/localize.sh: now installs a wrapper for "tcng", pointing to "tcc"
- scripts/symlinks.sh: now adds a link from "tcng" to "tcc"
- tcsim/tcsim.c: now calls "tcc" as "tcng"
- configure: changed "tcc" to "tcng" at all user-visible places
- tcc/tcc.c: no longer identifies itself as "tcc" when invoked with -V
- Makefile: the binary distribution for "tcc" is now called "tcng"
- build/{tcng,tcsim}.spec.in: changed most references for "tcc" to "tcng"
- Makefile: removed lib/tcng/include/klib/kernel/include from TCSIM_BINDIST
- configure now uses include/SNAPSHOT.h instead of RELNOTES to detect iproute2
  version
- configure is now compatible with iproute2-2.6.8-ss040730 and
  iproute2-2.6.9-ss040831 (updated tests/cbqroot and tests/tbf)
- tcng/README now recommends to download iproute2-2.6.9-ss040831.tar.gz
  (this also affects tcsim.spec)
- recent versions of iproute2 only support MPUs <= 255 bytes (updated
  tests/mpu)
- tcng can now use "conform-exceed" instead of "action" (updated tests/drop)
- configure: new options "--action" (or "-a") and "--conform-exceed" (or "-A")
  to override action handling
- tcc/Makefile now depends on ../config

Version 9m (9-MAY-2004)
-----------------------

- configure is compatible with 2.4.26
- updated kernel version example in README from 2.4.25 to 2.4.26
- scripts/compatibility.sh: added 2.4.26
- installation example in README now also mentions downloading the iproute2
  tarball from Debian
- configure and scripts/minisrc.sh now also recognize the Debian iproute
  tarball
- tcsim/setup.klib: added "time_after" and "time_after_eq" to linux/sched.h
- tcsim/setup.klib: converts dsfield.h to remove bare newlines from strings
  (needed to build tcsim with old kernel sources and a new gcc)
- if_u32.c:dump_and now checks if any but the last && term changes the offset
  group (tests/tcng-9m; updated tests/tcng-2i, reported by Laurent Moutel)
- tcsim/Makefile: compile tcsim.c without kernel includes, to avoid confusing
  glibc headers (reported by Nuutti Kotivuori)

Version 9l (29-FEB-2004)
------------------------

- configure did not preserve the YACC setting across sessions
- configure now complains if -k, -i, -d, -t, or -y have no argument
- tcc and tcsim now use -$ if -std=c99 does not work (updated tests/cppdollar)
- configure: new options "-$" and "--c99" (or "-c99") to override dollar
  handling
- the writer helper process of tcsim now always exits with _exit, to avoid
  running the exit handler that kills cpp
- runtests.sh converts " parse " to " syntax " in stderr if expecting an error,
  because some YACCs print "parse error" instead of "syntax error"
- examples/prio+fw, examples/tbf, examples-ng/pfifo_fast, examples-ng/prio+fw,
  examples/priority, tests/idiomatic, tests/packet, tests/tcsattpro,
  tests/tcsattpsv, tests/tcsattset, tests/tcsdefinc, tests/trace, tests/u32dlb,
  and tests/u32slb now avoid using variadic macros with an empty argument list
  all, to keep some versions of CPP from complaining
- tests/tcng-7g forced a syntax error at EOF, which yielded inconsistent
  results with different versions of CPP
- updated kernel version example in tcng/README from 2.4.22 to 2.4.25
- q_htb.c: used ~0UL to mean "0xffffffffUL"
- moved removal of .depend from "clean" to "spotless" make target
- tcsim/Makefile: removed left-over dependencies on module cleanup targets
  "ephemeral-mod" and "clean-mod"
- tcsim/modules/Makefile did not define OBJS

Version 9k (28-FEB-2004)
------------------------

- cpp 3.3.3 unceremoniously dropped "-$", so we're now using "-std=c99"
  (updated tests/cppdollar, tests/phasep; based on patch by Robin H. Johnson)
- tcc and tcsim now invoke cpp with argv[0] set to the name of cpp (instead of
  the name with which tcc or tcsim was invoked), for cpp 3.3.3 compatibility
  (updated tests/tcng-6u; fixed by Robin H. Johnson)
- POSIX obsoleted "tail -N", using "tail -n N" now (updated tests/tstcond;
  fixed by Robin H. Johnson)
- Makefile: added remark that the ebuild that comes with tcng isn't nearly as
  good as the one from Gentoo
- build system now uses bison if "configure" finds no yacc
- configure: added option --yacc (-y) to set the YACC command
- toys/comtc now uses extension .i instead of .cpp, since the latter caused cpp
  to switch to C++ mode
- configure: changed "dir_or_tarball" to "dir_or_tar.bz2" in description of
  "--kernel" argument
- configure now also accepts tarballs for iproute2
- added scripts/minisrc.sh which extracts the files needed to build tcsim from
  an iproute2 tarball
- changed UNDEF_U32 from ~0UL to ~0U for 64 bit compatibility
- tcc/ext_io.c:expand_errors added casts to avoid complaints when using a
  pointer difference in printf on 64 bit
- setup.klib: elements of "struct timeval" are now "unsigned long" instead of
  "unsigned" for better compatibility with glibc on 64 bit
- kmod_cc and tcmod_cc now use -fPIC for amd64 compatibility
- tcc/ext/Makefile and tcc/ext/tcc-ext-test.in now use -fPIC for amd64
  compatibility
- tcc/iflib_actdb.c:debug_subtree printed pointer to policier instead of its
  number
- setup.klib: linux/types.h now just #includes stddef.h instead of trying its
  own definitions for size_t and NULL
- changed long obsolete "make upload" to equal "make upload-sf"

Version 9j (26-FEB-2004)
------------------------

- Makefile: targets "tcc" and "tcsim" depend also on "shared" (reported by
  Mustafa Ogun)
- configure is compatible with 2.4.24 and 2.4.25
- scripts/compatibility.sh: added 2.4.23, 2.4.24, and 2.4.25
- minksrc.sh now only extracts kernel source from tarball if the source has not
  already been extracted
- moved progress reporting from "configure" to "minksrc.sh"
- "make clean" now also removes temporary files of "configure"

Version 9i (22-NOV-2003)
------------------------

- tcc now supports TBF with an inner qdisc (tests/tbfqdsyn, tests/tbfqdtc,
  tests/tbfqdext, tests/tbfqdrun)
- removed redundant flag QDISC_HAS_DEFAULT
- added build/tcng.ebuild file for Gentoo (by "raptor")
- Makefile: added "gentoo" target
- setup.klib no longer uses a symbolic link to the original source tree
- configure: added option --no-defaults to skip loading of old config file
- tcsim/Makefile.unclean tcsim/modules/Makefile: object files now depend on the
  config file
- added scripts/minksrc.sh which extracts the files needed to build tcsim from
  a kernel tarball
- added scripts/compatibility.sh which runs all regression tests involving
  tcsim for all supported kernel versions
- Makefile: added "compatibility" target
- "make sf-upload" now prints the MD5 message digest before uploading
- configure: removed 2.4.11 kernel, which was withdrawn
- configure: -k argument can be a kernel tarball
- runtests.sh: added option -t to run only tests probably using tcsim
- setup.klib: unconditionally defining LONG_MAX in include/linux/kernel.h broke
  2.5.4 builds

Version 9h (7-NOV-2003)
-----------------------

- tcc/ext/Makefile: dependencies now only include .c files compiled in that
  directory, removing a warning when building RPMs
- split tcsim/Makefile into Makefile.unclean and Makefile.clean to avoid
  rebuilding klib and ulib when cleaning up after configuration changes
- configure is compatible with 2.4.22 and 2.4.23 (pre-release, tested with
  2.4.23-pre9)
- setup.klib generates linux/smp.h needed for 2.4.22
- tcsim/trace.c and tcsim/modules/sch_discard.c adjust ..._drop prototype for
  interface change in 2.4.22
- setup.klib clears LANG before using sed on [^ -~]
- setup.klib adds "err" and "error_report" members to "struct sock" in
  af_netlink.c (for 2.4.23)
- updated kernel version example in tcng/README from 2.4.21 to 2.4.22
- configure: added options --no-manual and --with-manual (abbreviations -m and
  -M) to allow building tcng with or without the documentation (suggested by
  "raptor")
- configure: automatically assumes --no-manual if either latex or dvips is not
  in the PATH

Version 9g (6-NOV-2003)
-----------------------

- tcsim leaked memory for variable names (fixed by Dimitry Ketov)
- tcsim now frees commands after execution (based on a patch by Dimitry Ketov)
- tcsim -c freed command variables on each access (tests/tcng-9g)
- scripts/runtests.sh: the -c option had no effect and was not mentioned in the
  usage
- changed "tree color meter" to "three color meter" in documentation (fixed by
  Martin A. Brown)

Version 9f (19-JUN-2003)
------------------------

- updated kernel version example in tcng/README from 2.4.20 to 2.4.21
- setup.klib is now compatible with 2.4.21 (final release) (by Dimitry Ketov)
- fixed setup.klib compatibility with old kernels, like 2.4.3

Version 9e (28-APR-2003)
------------------------

- updated tests/tcng-6u to accept captialization of cpp 3.2
- put back packet ID in tcsim_filter output, which was removed in tcng-8x
  because I had forgotten that it was used for delay calculation in tcsim_plot
  (fixed by Dimitry Ketov; updated tests/basic, tests/tcng-8x, tests/tcsattpro,
  tests/tcsattpsv, and tests/tcsattset)
- doc/tcsim.inc: updated tcsim_filter output format description accordingly
- examples/dsmark+policing, examples/ef-prio, and examples/gred used UDP_HDR
  instead of IP_HDR
- "make rpm" and "make tcsim-rpms" now use "rpmbuild" instead of "rpm" if
  available

Version 9d (14-JAN-2003)
------------------------

- updated kernel version example in tcng/README from 2.4.19 to 2.4.20
- configure is now compatible with 2.4.21 (pre-release, tested with pre3)
- tcsim -V now also prints the versions of the kernel and iproute2 used to
  build it
- make "upload-sf" now runs md5sum after uploading
- README: changed tar xfI <file> to more compatible bzcat <file> | tar xf -
- generalized argument-fetching mechanism of sprintf, and split it into
  sprintf.c and sprintf_generic.c
- removed extra % from sprintf's precision error message (updated
  tests/sprintf)
- comtc's second pass now invokes tcc with the -n option, because some versions
  of CPP don't allow -include with -fpreprocessed
- toys/comtc mis-converted stdin location tags when using cpp 2.96 (reported by
  Martin A. Brown)
- tcsim executed original rtnl_close, closing an undefined file descriptor,
  which sometimes upset flex, causing it to fail with "input in flex scanner
  failed" (reported by "bauer")

Version 9c (14-NOV-2002)
------------------------

- if_u32 badly mis-ordered rules with multi-phase policers (tests/u32pol)
- updated tests/arith, tests/egress, tests/intro, tests/selpath,
  tests/selpathcbq, tests/selpathdup, tests/selpathgred, tests/tcng-2n, and
  tests/tcng-7o to use unified match format introduced with above fix
- tcc and tcsim silently ignored invalid digits in octal numbers
  (tests/tcng-9c)
- tcsim did not report EOF in tcng section as an error (tests/tcng-9c)
- updated tests/typerr and tests/varhash accordingly
- if_u32.c can now generate fw and tcindex classifiers from meta-fields
  (tests/metau32)
- for consistency, dsmark can now also default parameter "value" from qdisc
  (tests/u32pol)
- tests/tcstimstp used packets that caused SFQ to segfault under efence
- scripts/runtests.sh: also "comtc" now filters efence blabber
- added known range check problem to TODO

Version 9b (21-OCT-2002)
------------------------

- tcsim tried to ignore system HZ (tc/tc_core.c:tc_core_init), but didn't
- test "SLB with MPU (ext)" actually used tc, not the external interface
  (tests/mpu)
- added dependency on ../VERSION for tcc.o and tcsim.o
- if_u32.c now generates hashes only if they are actually referenced
- updated tests/cbqroot, tests/comtc, tests/egress, tests/htbng, tests/intro,
  tests/selpath, tests/selpathcbq, tests/selpathdup, tests/selpathgred,
  tests/tcng-2h, tests/tcng-2i, tests/tcng-2j, tests/tcng-2q, tests/tcng-3g,
  and tests/tcsenq accordingly

Version 9a (18-OCT-2002)
------------------------

- iflib_not.c:single_bit_test failed an assertion when comparing 128 bit
  values (tests/tcng-9a, reported by Jacob Teplitsky)
- shared/addr.c:ipv{4,6}_host now cache query results in order to avoid
  inconsistencies when external database changes during tcc run
- updated TODO accordingly
- added top-level Makefile target "count-tests"
- top-level Makefile targets "test", "tests", and "valgrind" weren't .PHONY
- "c" target did not detect unsupported field roots (tests/tcng-9a)
- "c" target now supports the "protocol" meta field (tests/protc)
- renamed meta.h to tccmeta.h and added it to tcc's public include files
- added support for meta-field to external interface (tests/protext)

Version 8z (10-OCT-2002)
------------------------

- tcc and tcsim allowed passing more than one file name to cpp, which treats
  the second file name as output file (tests/tcng-8z)
- protocol support for u32 mis-attached subexpressions under new field root
  (tests/protcomb)
- tests/htbquant and tests/tcstimstp did not probe if HTB is available before
  using it
- tcsim stopped HTB timers before last packet was sent (tests/tcstimstp)
- tcsim now detects stopped devices with packets pending at "end"
  (tests/tcstimstp)
- updated tests/basic, tests/tcssnap, tests/u32dlb, and tests/u32slb according
  to above change
- -Wexpensive did not warn about implicit negation (tests/tcng-8z)
- tcc: replaced -E with -Wexperror, and -E -E with -Wexppostopt (tests/newexp)
- updated tests/bitfield, tests/bittest, tests/expensive, tests/ne,
  tests/tcng-5y, and tests/tcng-7a according to above change
- tcc -E now runs cpp without any further processing (just like gcc -E;
  tests/tccin)
- tcc: added option -f infile to read from specified file, ignoring input file
  argument (tests/tccin)
- tcc now writes location map after dumping, in order to include
  target-specific fixups in map
- added script toys/comtc that copies comments immediately preceding elements
  to tc output (tests/comtc)
- runtests.sh: added command comtc to invoke toys/comtc
- tcc sometimes forgot that "prio" qdisc now supports policing (tests/tcng-8z)
- cleaned up hack causing compiler warning in if_u32.c

Version 8y (21-SEP-2002)
------------------------

- HTB quantum can now be specified in bytes or seconds (tests/htbquant)
- documented various parameter handling differences between tcng and tc
- added first example from HTB documentation to tests/htbng
- tcsim now uses default.tcsim to automatically include packet.def and
  ports.tc, similar to how tcc uses default.tc (tests/tcsdefinc)
- tcsim: added option -n to disable inclusion of default.tcsim
  (tests/tcsdefinc)
- updated tests/cbqroot, tests/cpp31, tests/defcbq, tests/defdsm, tests/ext,
  tests/idiomatic, tests/tcng-2j, tests/tcng-3i, tests/tcng-3t, tests/tcng-4n,
  and tests/trace to either invoke tcsim with -n, or to avoid using ip.def
- removed use of ip.def from all examples (examples/*, examples-ng/*)
- tcc/defaults.tc now resets the line number in order to work around strange
  cpps that embed -included file instead of including it, causing line numbers
  to be off by the length of the -included file (reported by "raptor")
- tcsim now stops SFQ and HTB timers at end (tests/tcstimstp)
- updated examples/sfq and examples-ng/sfq accordingly
- moved helper functions alloc, alloc_t, stralloc, and alloc_sprintf to
  tcng/shared/memutil.*
- added %c format to alloc_sprintf
- removed potential buffer overruns in tcsim/module.c and tcsim/cfg.l by using
  alloc_sprintf
- tcc did not complain when specifying "limit" in bytes and in packets for FIFO
  qdisc (tests/tcng-8y)
- added awk to build prerequisites

Version 8x (20-SEP-2002)
------------------------

- tcc: added HTB queuing discipline (tests/htbng, by Jacob Teplitsky)
- tcsim no longer resets the "protocol" attribute when traversing a link
  (tests/tcsattpsv)
- tcsim attributes now have two priorities (normal and default, indicated with
  the keyword "default"), and the global attributes can be set with the
  command "attributes" (tests/tcsattset)
- tcsim: IP_PCK and IP6_PCK now set the "protocol" attribute with "default"
  priority (tests/tcsattpro)
- updated kernel version example in tcng/README from 2.4.18 to 2.4.19 (change
  log incorrectly stated this had been done already in 8u)
- added warning when taking prefix of IPv4 or IPv6 constant instead of field
  (tests/constpfx, suggested by Jacob Teplitsky)
- added warning switch "constpfx" to control above warning (tests/constpfx)
- added new make target "immaculate" which also removes pre-built files
- tcc/ports.tc is now removed by "immaculate", not "clean"
- doc/Makefile can now re-generate EPS files (from FIG)
- .depend is now always removed on "spotless", never on "clean"
- various other minor "make clean" and "make spotless" corrections (most of
  them reported by Jacob Teplitsky)
- added dummy targets "depend" and "dep" to doc/Makefile
- documentation: added section describing parameter propagation rules
- tcng/README now lists packages required for building and using tcng
  (suggested by "raptor")
- setup.klib now reverts PSCHED_CLOCK_SOURCE to PSCHED_JIFFIES in case it was
  changed in the source tree (reported by "raptor")
- runtests.sh got confused by END CONDITIONAL followed by BEGIN CONDITIONAL
  (tests/tstcond)
- tcc let various types of "drop on" slip through, crashing it later
  (tests/dropon)
- moved "drop on" test from tests/misfeatures to tests/dropon
- tcsim_filter failed to select by device name (tests/tcng-8x)
- documentation: -c was missing in "tcsim_filter tos=0xb8" example
- tcsim_filter included packet ID in output, although documentation claims it
  doesn't, which makes more sense (tests/tcng-8x)
- tcc failed to refuse element ID zero in "fw" filter (tests/tcng-8x)
- updated tests/blocks, tests/cbqzero, tests/extndm, tests/location,
  tests/misfeatures, tests/newsynmsc, tests/semicolon, tests/tag,
  tests/tcng-5g, and tests/tcng-6w accordingly
- tcsim/packet6.def:IP6_HDR did not initialize $ip6_plen
- added pending issues related to protocol selection support to tcng/TODO

Version 8w (13-SEP-2002)
------------------------

- added root of meta fields (__meta) and definitions for meta-fields in meta.tc
  (included via fields.tc)
- added some layer > 2 protocol numbers to values.tc
- tcsim's send command now has a "protocol" attribute (default: ETH_P_IP)
- updated documentation according to above changes
- ip_hdr and ip6_hdr now check meta_protocol if USE_META_PROTOCOL is #defined
- added protocol selection support to if_u32.c (tests/protu32)
- filters fw, tcindex, and u32, now default to ETH_P_ALL instad of ETH_P_IP
- updated tests/cbqroot, tests/egress, tests/named, tests/selpath,
  tests/selpathcbq, tests/selpathdup, and tests/setpathgred accordingly
- configure now detects and prints kernel extra version (e.g. pre7)

Version 8v (12-SEP-2002)
------------------------

- configure is now compatible with 2.4.20 (pre-release, tested with pre6)
- tcsim/setup.klib: added struct notifier_block declaration for 2.4.20-pre6
  compatibility
- tcsim/setup.klib: disables psched_tick (added in 2.4.20) when terminating
- added HTB and its various dependencies to the tcsim kernel build process
- runtests.sh now only counts tests instead of running them if environment
  variable TCNG_TESTS_COUNT is set
- runtests.sh: added conditional test execution (tests/tstcond)
- runtests.sh: added command runtests for regression testing the regression
  test script
- README: described how to build tcsim with HTB support (tests/htb)
- tcsim now sets printk log level to KERN_WARNING (4)
- tcsim: added option -k <number> to set kernel logging threshold
- updated documentation accordingly
- added "help" target to top-level Makefile

Version 8u (12-AUG-2002)
------------------------

- updated kernel version example in tcng/README from 2.4.18 to 2.4.19
- configure is now compatible with 2.4.19 (final release)
- tcc refused to left-shift 32 bit values by 0 bits (tests/tcng-8u)
- configure now checks for defective cpp (reported by "raptor")
- added undocumented options --kversions and --iversions to configure
- added script build/findsrc to locate source files
- "make tcsim-rpms" now uses any supported version of kernel and iproute2, not
  only the suggested one
- added more experimental code for FSM-based classification (not yet useful)
- documentation: tcsim figure still called tcsim_filter and tcsim_plot
  "filter.pl" and "plot.pl"

Version 8t (16-JUL-2002)
------------------------

- tcc: changed some "error"s to "lerrors"s (by Jacob Teplitsky)
- updated tests/tcng-4i accordingly
- tcc selected CBQ class 0 when using negation, causing the kernel to busy loop
  (tests/cbqzero; reported by Bert Hubert)
- updated tests/cbqroot accordingly
- tcsim/cfg.[ly] claimed their names were tcsim.[ly]
- tcsim allowed second and jiffie values to begin with opening square bracket
  (tests/tcng-8t)
- tcsim now supports SI prefixes "M", "k", "m", and "u" for second and jiffie
  values (tests/tcssi)
- tcsim now supports relative time for "time" and "until" (tests/tcsrelt)
- updated documentation according to above two changes
- copied acknowledgements from README to documentation preamble
- began adding support for FSM-based classification to external interface
  (untested and undocumented)
- changed "-C" to "nounspec" in all test titles of tests/defdsm
- RPM build didn't build "shared" directory introduced in tcng 8s

Version 8s (21-JUN-2002)
------------------------

- merged u128.[ch] from tcsim and tcc into shared/libtcngmisc.a
- tcsim now sets the line style globally, such that it can be overridden with
  -cmd, e.g. -cmd "set data style linespoints"
- tcsim_plot didn't check return value from system (reported by Bodo Bauer and
  Don Provan)
- tests/tcng-8q exercises masking via offset and size (suggested by Jacob
  Teplitsky)
- merged ipv4_host/ipv6_host from tcc and evaluate_ipv4 and evaluate_ipv6 from
  tcsim into shared/libtcngmisc.a
- tcc and tcsim did not accept address 255.255.255.255 (tests/tcng-8q)
- scripts/update-port-numbers.sh: increased ports file update interval from one
  week to 92 days, and switched to using temporary file for download
- documented that "." does not work as an operator and therefore can't be used
  with parentheses (tests/misfeatures)

Version 8r (31-MAY-2002)
------------------------

- tcsim: added out_of_line_bug to linux/kernel.h for compatibility with recent
  2.4.19 pre-releases (tested with 2.4.19-pre9)
- tcsim: added min_t to linux/netdevice.h for compatibility with recent 2.4.19
  pre-releases (tested with 2.4.19-pre8)
- doc/Makefile now strips extraneous meta-information from EPS included in
  Postscript output when converting from DVI to Postscript
- fixed truncated comment in build/tcsim.spec.in
- build/tcng.spec.in: added conflict between current tcc and tcc-devel < 7r
- tcsim_plot: new option  -cmd gnuplot_command  to pass commands to gnuplot
- updated doc/tcsim.inc accordingly
- doc/tcsim.inc: tcsim_filter synopsis did not include -jpeg and -png

Version 8q (26-MAY-2002)
------------------------

- removed doc/external.tex and doc/build.asc
- flagged tcc/README, tcc/LANGUAGE, and tcsim/README as obsolete
- added much improved documentation in doc/
- upgraded scripts/t2x.pl to version "26-MAY-2002" (various improvements)

Version 8p (22-MAY-2002)
------------------------

- added %f format to sprintf (tests/sprintf)
- added "uninstall" target to tcng/Makefile
- added section comments to tcng/Makefile
- tcsim now pretty-prints enqueuing results, as it only did when tracing
  (tests/tcsenq)
- updated tests/trace accordingly
- scripts/trinity.sh now puts $topdir/bin first in the PATH, to avoid getting
  confused by installed version of tcng

Version 8o (21-MAY-2002)
------------------------

- if execvp fails, now also tcsim prints the path of the CPP it tried to run
  (reported by munro)
- tcsim/packet6.def initialized fictitious $ip6_proto instead of $ip6_nxt
- tcsim/packet4.def: changed size prefix of $ip_src, $ip_dst, and $igmp_group
  from nl: to ipv4:
- added optional "mpu" (minimum policed unit) parameter to metering macros,
  with default value 0B (tests/mpu)
- added support for buckets with non-zero mpu parameter to if_u32.c (tests/mpu)
- police.c:dump_police_tc issued mpu as rate, not as size

Version 8n (17-MAY-2002)
------------------------

- forgot to include tests/sprintf in distribution, oops
- sprintf ignored leading zero in format string (tests/sprintf)
- sprintf caused tcc to abort when processing %% with a format specification
  yielding not exactly one character (tests/sprintf)
- sprintf now also supports octal output (%o), and precisions other than "*"
  (tests/sprintf)
- documented further IPv6 constraints in TODO
- tcsim_filter now prints snapshots before processing events at the same time
- tcsim_filter now sorts snapshots
- added regression tests for tcsim_filter's -s option, and the corresponding
  bypass in tcsim_plot (tests/tcssnap)
- tcsim_plot ignores snapshots from tcsim_filter if writing the plot to
  standard output (tests/tcssnap)
- ".ipv6" test was missing in tests/ipv6
- updated change log entry of version 8d accordingly

Version 8m (17-MAY-2002)
------------------------

- util.c:alloc_sprintf advanced pointer too far on %.*s
- util.c:alloc_sprintf mis-calculated length if string is shorter than
  precision
- tcng: added new function sprintf(fmt,...) with Perl-like semantics
  (tests/sprintf)
- tcsim_filter: new option -s <time> to generate counter snapshot (prefixed by
  "# ") at specified time
- tcsim_plot copies lines beginning with "#" to standard output

Version 8l (16-MAY-2002)
------------------------

- new Makefile target "valgrind" to run all regression tests under Valgrind
- rel_access over-optimized <= and >= with masked access, yielding incorrect
  classifiers (tests/relmask)
- added external program tcc-ext-null that blackholes input, which is useful
  for performance tests
- updated Makefile, build/tcng.spec.in, and scripts/symlinks.sh according to
  above change

Version 8k (16-MAY-2002)
------------------------

- iflib_arith.c:ne_to_eq now also supports IPv6 addresses (tests/ipv6relne)
- iflib_arith.c:rel_general now also supports IPv6 addresses (tests/ipv6relge)
- updated tests/ipv6relar accordingly
- removed obsolete entries from TODO

Version 8j (14-MAY-2002)
------------------------

- tcsim_plot still called tcsim_filter filter.pl (tests/tcng-8j)
- tcsim_plot, tcsim_filter, and tcsim_pretty still called themselves in
  comments plot.pl, filter.pl, and pretty.pl, respectively
- added tcsim_plot to programs recognized by scripts/runtests.sh
- "egress" classes were not converted to "dsmark" when using tc output
  (tests/tcng-8j)
- tcsim_plot now writes to standard output if the file name for -p, -png, or
  -jpeg is "-"
- tcsim_plot now sets output to /dev/null before terminating, to avoid plotting
  twice
- added rules for common configurations of srTCM and trTCM to if_u32.c
  (tests/u32srtcm, tests/u32trtcm)
- if_u32.c:issue_actions ignored the do_actions flag and generated actions
  at each phase, which would yield invalid advanced meters (like trTCM)

Version 8i (14-MAY-2002)
------------------------

- tcc: -xall:... implies "all" (tests/extall, suggested by Jacob)
- iflib_arith.c: rel_math, rel_to_eq, and rel_eq_or now also support IPv6
  addresses (tests/ipv6relar)
- updated TODO accordingly

Version 8h (30-APR-2002)
------------------------

- tests/intro was not included in distribution
- constant overflow in multiplication and bit-shifts now yields an error
  (tests/range)
- constant overflow caused by right-shift of access now yields a warning
  (tests/range)
- updated tests/access and tests/ipv6 accordingly
- attempting to take the modulo of an address now yields an error
  (tests/tcng-8h)
- tcc/named.c:ipv6_host always used AI_NUMERICHOST, even if allow_dns was set
- tcc/tcng.y: clarified that "host" must be identical to "host4"
- tcsim now supports IPv6 addresses and 128 bit arithmetic (tests/ipv6tcs)
- tcsim has new type qualifiers "ipv4" and "ipv6" (tests/ipv4tcs,
  tests/ipv6tcs)
- split packet.def into packet4.def and packet6.def, with new packet.def that
  includes both
- updated Makefile, build/tcsim.spec.in, and scripts/symlinks.sh according to
  above change
- added remaining pending IPv6 issues to TODO

Version 8g (30-APR-2002)
------------------------

- tcsim now accepts an optional unit name after the interface rate
  (tests/tcsiru)
- changed tcc/iflib_arith.c:rel_access to use 128 bit arithmetic
- updated tests/access accordingly
- if_u32.c and if_ext.c now support 128 bit matches (tests/ipv6u32 and
  tests/ipv6ext)
- new tcc include file default.tc, which is included by default (tests/definc)
- split fields.tc into fields4.tc and fields6.tc, with new fields.tc that
  includes both
- updated Makefile, build/tcng.spec.in, and scripts/symlinks.sh according to
  above two changes
- new tcc option -n to suppress inclusion of default.tc (tests/definc)
- updated tests/cpp31 accordingly

Version 8f (29-APR-2002)
------------------------

- oops, 8e had wrong release date
- tcsim/usvc.c:rtnl_open did not initialize rth->seq, yielding a complaint from
  Valgrind
- removed corresponding sections from build/valgrind.supp.in
- configure is now compatible with iproute2-2.4.7-now-ss010803, 010824, and 
  020116(-try)
- tcng/README now recommends to download iproute2-2.2.4-now-ss010824.tar.gz
  (this also affects tcsim.spec)

Version 8e (26-APR-2002)
------------------------

- added new operators "host4" and "host6" to processs IPv4 and IPv6 addresses,
  respectively (tests/ipv4, tests/ipv6)
- tcng.l now recognizes RFC2373-style IPv6 addresses (tests/ipv6,
  tests/misfeatures)
- print_data can now print IPv6 addresses (tests/ipv6)
- decisions with non-logical operators are now caught earlier (tests/decerr)
- various minor fixes in nascent but still unusable IPv6 support (tests/ipv6)

Version 8d (25-APR-2002)
------------------------

- IPv4 addresses have now their own first-class data type (tests/ipv4)
- in debugging output and variable use output, IPv4 addresses are now printed
  as dotted quads instead of hexadecimal integers
- updated tests/named2 accordingly
- added size qualifiers "ipv4" and "ipv6" (tests/ipv4, tests/ipv6)
- dotted quads and "host" now yield IPv4 addresses instead of integers
  (tests/ipv4)
- "/" becomes a mask operator when applied to an IPv4 address (tests/ipv4)
- added partial (useless) support for IPv6 addresses
- added 128 bit arithmetic operations in u128.[ch]
- print_expr now also prints an operator's type if it is not dt_none, dt_unum,
  or dt_decision
- fields.tc: changed type of ip_src, ip_dst, and igmp_group from .nl to .ipv4
  (tests/ipv4)
- inside tcng.y, FIELD_NAME was of type char * instead of FIELD *

Version 8c (24-APR-2002)
------------------------

- scripts/runtests.sh: added command-line option -g for using Valgrind
  (see http://developer.kde.org/~sewardj/)
- added Valgrind suppression file build/valgrind.supp.in
- added fields for old-style TOS octet (RFC791) to idiomatic.tc (suggested by
  Jacob)

Version 8b (25-MAR-2002)
------------------------

- merged class of ingress/egress was sometimes referenced after freeing,
  yielding weird results or crashes (tests/merged, reported by Jacob)
- tcc now warns that class for shared qdisc should be implicit (tests/merged)
- added warning switch "explicit" to control above warning (tests/merged)
- updated tests/classvar, tests/dpcwng, tests/egress, tests/extqch,
  tests/ingin, and tests/tcng-7n accordingly

Version 8a (15-MAR-2002)
------------------------

- changed tests/intro to use "egress" instead of "dsmark"
- improved error message when attempting to use class selection path with
  non-class (tests/tcng-8a, reported by Jacob)
- updated tests/nullcsp accordingly
- "tc" target didn't call egress "dsmark", and forgot to add default index
  parameter (tests/tcng-8a)
- updated tests/egress accordingly

Version 7z (12-MAR-2002)
------------------------

- runtests.sh: added commands tcsim_unadorned and tcc_unadorned to invoke the
  respective program without adding options or arguments
- changed tests/tcng-6z to use tcsim_unadorned and tcc_unadorned instead of
  tcsim/tcsim and tcc/tcc, respectively
- default fifos are no longer added to yet-to-be-numbered (by a class selection
  path) class, where they then then caused a complaint about numbering a class
  with shared qdisc (tests/tcng-7z, reported by Jacob)

Version 7y (12-MAR-2002)
------------------------

- added new qdisc "egress" that is synonymous to "dsmark", except that it
  implies "default_index 0", and that using it as an "inner" qdisc produces a
  warning (tests/egress)
- changed all error and warning messages mentioning "dsmark" to say "egress" if
  using egress (tests/egress)
- updated tests/extndm accordingly
- added regression test for dsmark's unnumbered and parameterless class warning
  (tests/dpcwng)
- fixed off by one error in dsmark index out of range diagnostic
  (tests/tcng-7y)
- updated tests/dsind and tests/tcng-1i accordingly
- ingress qdisc generated invalid default classification decision dt_class
  instead of dr_class (tests/tcng-7y)

Version 7x (12-MAR-2002)
------------------------

- tests/ingin: added tcc-ext-echo example
- added introductory example script tests/intro (suggested by Jacob)
- policer id assignment is now almost O(n), instead of O(n^2) (tests/fastpol)
- tcc/Makefile did not rebuild ports.tc after "make clean"

Version 7w (11-MAR-2002)
------------------------

- tcc: moved class selection path code to separate file csp.c
- dsmark now accepts class zero generated via class selection paths
  (tests/tcng-7w)
- class selection paths can now be empty (tests/nullcsp)
- tcng now allows ingress qdisc to have a child qdisc, like dsmark
  (tests/ingin)
- updated tests/ingext accordingly
- support for class selection paths is now qdisc flag (tests/tcng-7w)
- updated tests/extndm accordingly

Version 7v (7-MAR-2002)
-----------------------

- variable name lookup now uses a hash instead of a linear search
- tcc: added undocumented option -H to dump hash statistics (tests/varhash)
- iflib_actdb.c: when assigning preferred action numbers, use an unsorted
  list of preferred numbers first, then a sorted list, instead of always
  walking the whole action tree (tests/fastpref)

Version 7u (5-MAR-2002)
-----------------------

- removed "ingress" qdisc restriction when using -Xx,all (tests/ingext)
- changed error messages for ingress qdisc to include location (tests/ingext)
- in diagnostics related to an inner qdisc, gred and dsmark now report qdisc
  location, not class location (tests/tcng-7u)
- updated tests/grederr accordingly

Version 7t (4-MAR-2002)
-----------------------

- tcsim/klink.c: backed out accidential (but harmless) inclusion of linux/ip.h
- tcc/ext/tccext.c: allocation for bit strings is now rounded to the next
  full machine word (suggested by Jacob)
- printing the usage of redefined variables containing structures crashed tcc
  (tests/tcng-7t, reported by Jacob)
- increased packet size in tests/barrier because too short packets could crash
  dsmark since tcsim pretends they're IPv4 anyway

Version 7s (4-MAR-2002)
-----------------------

- updated kernel version example in tcng/README from 2.4.17 to 2.4.18
- configure is now compatible with 2.4.19 (pre-release, tested with pre2),
  2.5.3, and 2.5.4
- README: clarified valid kernel versions, i.e. that 2.5.5 and above are
  currently not supported
- began adding "Bivio Networks" where "Network Robots" is used, or replacing
  the latter

Version 7r (1-FEB-2002)
-----------------------

- tccext: added new construct "barrier", indicated by
  TCCEXT_RULE->actions == NULL, to delimit uncombined, locally optimized rule
  sets
- updated tccext.h, tccext.c, echo.c, and match.c accordingly (tests/barrier)
- tccext: new configuration keyword "nocombine" to keep tcc from merging ifs
  into a single large expression (suggested by Jacob; tests/nocombsta,
  tests/nocombmet)
- tcc-ext-test now also accepts option "nocombine" (tests/barrier)

Version 7q (31-JAN-2002)
------------------------

- "drop with u32" was missing in version 7o change log entry
- changed if_ext_act.c to store pointers to buckets/classes, instead of values
  extracted from them
- tcc: renamed if_ext_act.c to iflib_actdb.c to reflect sharing with if_u32.c
- u32 target now supports SLB and DLB meters (tests/u32slb, tests/u32dlb)
- tcc incorrectly required "mtu" if "peakrate" was not specified
  (tests/tcng-7q)
- meters.tc: meter test macros did not enclose argument in parentheses, and
  grammar did not allow parentheses around policer definition (tests/tcng-7q)
- meters.tc: meter test macros now evaluate macro argument only once
  (tests/metmac)

Version 7p (29-JAN-2002)
------------------------

- fixed buggy buffer use in location.c (tests/tcng-7p)
- in variable use file, each structure entry now yields a separate line, even
  if the whole structure was generated in a single assignment (tests/struct)
- data_clone left parent pointer of top-level structure elements uninitialized
- compound expressions may now also include field definitions (tests/compound)
- meters.tc now has macros SLB, DLB, srTCM, and trTCM which are used
  $var = SLB(...) instead of set_SLB($var,...) (tests/meters2)

Version 7o (29-JAN-2002)
------------------------

- tcc: -S now omits separator entirely
- updated tests/tcng-7n accordingly
- back-ported match generation back-end from external interface to u32, to
  allow for transparent elimination of contradictory matches
- updated tests/tcng-2o accordingly
- also u32 targets now propagates actions to leaf nodes
- u32 did not generate correct default classification when negating
  (tests/tcng-7o)
- u32 target now supports "drop" action (tests/u32drop)

Version 7n (27-JAN-2002)
------------------------

- tcc: undocumented option -S joins structure entries in variable use output
  with an underscore instead of a dot (tests/tcng-7n)
- dsmark now auto-assigns class number if using only one class, so that this
  class has the implicit qdisc (reported by Jacob; tests/tcng-7n)
- values.tc now complains if included directly, not via fields.tc
  (tests/includes)
- tcsim's packet.def pretends to be fields.tc when including values.tc
  (tests/includes)
- new header file idiomatic.tc, for inclusion from fields.tc, with convenience
  macros for idiomatic patterns in TCP/IP packets (tests/idiomatic)
- updated scripts/symlinks.sh and build/tcng.spec.in to include idiomatic.tc
- dsmark did not detect duplicate class numbers (tests/tcng-7n)

Version 7m (26-JAN-2002)
------------------------

- added first-class data type "bucket", which is similar to "police", but it
  only takes parameters "rate", "burst", "mpu", "pragma", and "tag", has no
  attached decisions, and cannot be used in filter ... police ... expressions
  (tests/bucket)
- updated meters.tc to use buckets instead of policers (the "mtu" parameter is
  still accepted, but now ignored)
- tcc/data.[ch]: removed ancient #ifdefs that controlled whether data_destroy*
  really free data
- added compound expression construct { $var = ...; ...; expression; }
  (tests/compound)
- added structure data type (associative arrays) (tests/struct)
- updated tests/tcng-1h and tests/typerr to reflect changed diagnostics due to
  parser modifications
- unit suffixes and size qualifiers are now processed in parser instead of
  scanner, reducing name space restrictions (tests/tcng-7m)
- tcc accepts (and ignores) option -S again (will be used for compatibility
  mode in the future)

Version 7l (25-JAN-2002)
------------------------

- several small corrections in tcc's usage output
- tcc: removed option -S (obsolete since version 6w)
- updated tests/tcng-6w accordingly
- configure is now compatible with 2.5.3 (pre-release, tested with pre5)
- tcsim/setup.klib: changed af_netlink.c filter for 2.5.3-pre5 compatibility

Version 7k (15-JAN-2002)
------------------------

- renamed tcsim's pretty.pl to tcsim_pretty
- updated tcsim/README accordingly
- added tcsim_pretty to tcsim RPM
- upgraded scripts/t2x.pl to version "15-JAN-2002" (adds %%end directive and
  fixes meta-characters as \verb deliminators)
- several small corrections in tcsim's usage output and tcsim/README

Version 7j (1-JAN-2002)
-----------------------

- updated kernel version example in tcng/README from 2.4.16 to 2.4.17
- configure is now compatible with 2.4.18 (pre-release, tested with pre1),
  2.5.2 (pre-release, tested with pre5)
- field roots are now syntactically equivalent to fields and can be combined
  with offsets and size qualifiers (tests/tcng-7j)
- updated tests/grpalloc accordingly
- corrected missing access size adjustment uncovered by field root syntax
  change
- if_ext.c: added assertion to catch above type of bug

Version 7i (31-DEC-2001)
------------------------

- credits at the beginning of README now also mention Jacob Teplitsky's
  contributions
- added new tcng construct "field_root" to set non-zero base offset group
  (tests/froot)
- updated tcc/LANGUAGE accordingly
- tcc now assigns offset group numbers starting with 100 (defined in
  config.h:AUTO_OFFSET_GROUP_BASE, tests/grpalloc)
- updated tests/bitfield, tests/extmult, tests/field, tests/field2,
  tests/precond, and tests/tcng-2u accordingly

Version 7h (22-DEC-2001)
------------------------

- if_ext.c: bits from impossible matches could "leak" to next match
  (tests/tcng-7h)
- updated tests/precond accordingly
- added test <= 5 to tests/relop
- tcc: added option -O to enable optimizations
- iflib_arith.c: added prefix-based conversion of relational operators, enabled
  with -Oprefix (suggested by Jacob; tests/relpref)
- iflib_arith.c: != can now be turned into multiple tests for equality, enabled
  with -One (tests/ne)
- common subexpression elimination can now be disabled with -Onocse (tests/cse)

Version 7g (18-DEC-2001)
------------------------

- macro expansions used by tcc_var2fix.pl were incompatible with Red Hat cpp
  2.96-54; rewrote tcc_var2fix.pl to use different expansion mechanism
- tcc gave syntax error for file beginning with semicolon (tests/tcng-7g)
- tcsim treated semicolons after whitespace in tcc input as comments
  (tests/tcng-7g)

Version 7f (14-DEC-2001)
------------------------

- split tcc/fields.tc into fields.tc and values.tc to allow inclusion of the
  latter by packet.def
- updated tcc/LANGUAGE accordingly
- added tcsim/packet.def, a modernized version of ip.def (tests/packet)
- -N skips most optimizations in the "old" algorithm, for experiments with
  "smart" backends
- mask operator generated mask 0 instead of 0xffffffff for ":32" (reported by
  Jacob; tests/tcng-7f)

Version 7e (13-DEC-2001)
------------------------

- the use of bare words as strings in expressions or in warning labels is now
  a syntax error
- updated tests/bare, tests/host, tests/ports, tests/tag, and tests/tcng-7c
  accordingly

Version 7d (13-DEC-2001)
------------------------

- tcc now issues a warning if treating a bare word as a string in expressions
  and in warning label lists (tests/bare)
- updated tcc/LANGUAGE accordingly
- updated examples-ng/prio+rsvp, tests/extrasemi, tests/host,
  tests/misfeatures, tests/named, tests/named2, tests/ports, tests/semicolon,
  tests/tag, tests/varredef, tests/waprpos, and tests/warn accordingly

Version 7c (13-DEC-2001)
------------------------

- fields.tc: changed definitions of ip_RF, ip_DF, ip_MF, tcp_URG, tcp_ACK,
  tcp_PSH, tcp_RST, tcp_SYN, and tcp_FIN to return 0 or 1, not 0 or 2^n
  (tests/bitfield)
- Makefile now uses rpm --eval instead of build/dummy.spec hack
- removed build/dummy.spec
- filter "route" parameter "fromif" now accepts constant expressions, and no
  longer requires fixed string (tests/tcng-7c)

Version 7b (11-DEC-2001)
------------------------

- added option -N or --with-tcsim to "configure"
- tcc/iflib-red.c: fixed gcc 3.1 syntax incompatibility
- changed tests/cppdollar to ignore extra blank lines emitted by cpp 3.1
- tcc/location.c: changed default file name from "(stdin)" to "<stdin>", for
  cpp 3.1 compatibility (tests/cpp31)
- tcc/location.c now inserts "<stdin>" when encountering empty file name, e.g.
  from older versions of cpp (tests/cpp31)
- updated tests/bands, tests/basic, tests/blocks, tests/cbqroot, tests/defdsm,
  tests/drop, tests/dsind, tests/expensive, tests/extcbq, tests/extflt,
  tests/extlocbas, tests/extlocext, tests/extndm, tests/fredef, tests/grederr,
  tests/host, tests/ifnamsiz, tests/location, tests/misfeature, tests/named,
  tests/newsynmsc, tests/phasep, tests/ports, tests/selpath, tests/setpathcbq,
  tests/selpathdup, tests/selpathext, tests/semicolon, tests/tag,
  tests/tcng-1g, tests/tcng-1h, tests/tcng-1i, tests/tcng-1j, tests/tcng-2e,
  tests/tcng-2k, tests/tcng-3k, tests/tcng-3m, tests/tcng-4f, tests/tcng-4i,
  tests/tcng-4u, tests/tcng-5a, tests/tcng-5c, tests/tcng-6t, tests/tcng-6w,
  tests/tcng-6x, tests/tcng-7a, tests/typerr, tests/variables, tests/varredef,
  tests/waprpos, and tests/warn accordingly
- updated tcng/tcc/README accordingly (i.e. also location map uses "<stdin>"
  instead of "-")
- added -X phase "P" for tcsim's cpp
- tcsim/cfg.l also follows "<stdin>" convention (tests/cpp31)
- changed tests/modules to work around strange environment variable propagation
  in recent version of bash
- scripts/run-all-tests: work-around for case insensitive character range bug
  in some versions for bash

Version 7a (7-DEC-2001)
-----------------------

- tcc -E -E no longer refuses ">" and ">=" as "expensive" even though
  iflib_arith.c:rel_general could handle them (tests/tcng-7a)

Version 6z (6-DEC-2001)
-----------------------

- updated kernel version example on tcng/README from 2.4.14 to 2.4.16
- configure is now compatible with 2.4.16, 2.4.17 (pre-release, tested with
  pre5), 2.5.0, and 2.5.1 (pre-release, tested with pre5)
- if tcsim couldn't exec tcc, it claimed cpp was missing
- tcc.c:main did not allocated room for -$ in cpp argv, causing tcsim to
  segfault if invoked without arguments (tests/tcng-6z)
- tcc/Makefile: added comment explaining why "make clean" and "make spotless"
  don't remove file "port-numbers"
- tcc did not accept semicolons immediately following opening curly brace
  (tests/tcng-6z)

Version 6y (20-NOV-2001)
------------------------

- tcc/README: added unnamed scopes to description of variable usage output
- tcsim now allows double quotes around interface names (tests/tcng-6y)
- tcc-ext-test subsystem now removes .so, .o, and .out files after usage
- fields.tc: fragment flag values were shifted by four bits (tests/tcng-6y)
- updated tests/subbyte accordingly

Version 6x (19-NOV-2001)
------------------------

- tcc and tcsim now invoke cpp with the option -$ (tests/cppdollar)
- tcng: blocks ({...}) are allowed anywhere inside other blocks (tests/blocks)
- updated tcc/LANGUAGE accordingly
- removed comment explaining past syntax weirdness from tcc/tcng.y
- lexer read token past closing curly brace with inner scope (tests/tcng-6x)
- tcc_var2fix.pl generated macros with same name as variables, causing
  conflicts when using -$
- removed explicit detection of old-style syntax error of named device without
  block (tests/newsynmsc)
- like classes and filters, now also qdiscs can be extended (tests/extend)
- util.h:__DP_CHECK did not print error location (tests/tcng-6x)
- on SIGINT, tcc tried to close stream even if already closed, failing
  assertion
- added external script tcc-ext-abort that simply sends a SIGABRT to itself
- tcc now fully decodes and reports exit status and signals from external
  program (reported by Ronald Murphy; tests/tcng-6x)

Version 6w (15-NOV-2001)
------------------------

- tcc's usage output did not mention -u in the synopsis
- tcc: backwards-compatibility -S no-op now yields a warning (tests/tcng-6w)
- filter.c:unum_only now prints source code location on error (tests/tcng-6w)
- tcc did not refuse filters other than tcindex on child qdiscs or their
  classes when using "all" with external interface (tests/tcng-6w)
- tcc adds empty classifier if classifier is missing when using "all" with
  external interface (tests/tcng-6w)
- updated tests/extlocbas, tests/pragma, tests/tcng-4d, tests/tcng-4l,
  tests/tcng-4o, and tests/tcng-5s accordingly

Version 6v (9-NOV-2001)
-----------------------

- updated kernel version example on tcng/README from 2.4.13 to 2.4.14
- configure is now compatible with 2.4.15 (pre-release, tested with pre1)
- iflib_red.c:bubble_or mis-converted (a || side_effect) && b (tests/tcng-6v)
- iflib_act.c:iflib_actions now does second round of optimizations to resolve
  constants hidden between actions (see above)
- updated tests/misfeatures accordingly
- type error messages now contain the type found, and frequently also the type
  expected (tests/typerr)
- updated tests/ports, tests/tcng-6t accordingly

Version 6u (26-OCT-2001)
------------------------

- tcc and tcsim did not look at exit status of cpp subprocess (reported by
  Ronald Murphy; tests/tcng-6u)
- changed tcc_var2fix.pl to use a field instead of a dummy macro assignment,
  such that no cleanup is needed after invoking the "next" macro, and
  continuation (i.e. semicolon or curly brace) following the generated macro
  can be applied to the "next" macro

Version 6t (25-OCT-2001)
------------------------

- assert in qdisc.c:add_default_fifos assumed qdisc was already sanity-checked
  (reported by Ronald Murphy; tests/tcng-6t)
- updated kernel version example on tcng/README from 2.4.12 to 2.4.13
- configure is now compatible with 2.4.14 (pre-release, tested with pre1)
- dropped tcc/tcm.tc from the distribution (and all its offsprings)
- added scripts/update-port-numbers.sh and scripts/extract-port-numbers.pl to
  download IANA port-numbers file and to convert it a format suitable for
  inclusion by tcng scripts (tests/ports)
- added ports.tc to source distribution and to all tcc binary distributions
- in expressions X+0, 0+X, and X-0, type of X was not verified (tests/tcng-6t)
- tcsim/ip.def now uses ports.tc for port definitions (PORT_DNS changed to
  PORT_DOMAIN)
- updated examples-ng/u32, examples/u32, tests/ext, and tests/trace accordingly
- removed description of ambiguous drop with old syntax from tcc/LANGUAGE

Version 6s (23-OCT-2001)
------------------------

- cleaned up "TODO"
- fields.tc: ip_RF, ip_DF, ip_MF, tcp_URG, tcp_ACK, tcp_PSH, tcp_RST, tcp_SYN,
  tcp_FIN no longer contain explicit comparison, allowing tcc to perform better
  optimizations
- updated tests/subbyte accordingly
- moved scripts/var2fix.pl to tcc/tcc_var2fix.pl
- scripts/symlinks.sh links tcc/tcc_var2fix.pl to bin/
- build/tcng.spec.in: included tcc/tcc_var2fix.pl in the tcc-devel RPM
- scripts/symlinks.sh tried to link to directory with ln -s instead of ln -sfn

Version 6r (23-OCT-2001)
------------------------

- alternate device name syntax "dev <expression>" (suggested by Simon Nuthall;
  tests/named2)
- updated tests/location and tests/tag accordigly (used device name "dev")
- updated tcc/LANGUAGE accordingly
- enabled "new" algorithms (except for the "new" bit-tree) and removed some
  old code (iflib_red.c:optimize_eq, shift handling in iflib_bit.c:eq_fsm,
  special treatment of -N in tcc.c:main)
- updated tests/arith, tests/access, tests/bittest, tests/buckfill,
  tests/misfeatures, tests/tcng-2k, tests/tcng-5z
- moved various shift and mask related problems from tests/misfeatures to
  tests/tcng-6r

Version 6q (23-OCT-2001)
------------------------

- ext_io.c now cleans up temporary files when interrupted with SIGINT
- added scripts/run-all-tests which does what the name suggests
- TCNG_TESTS_BINDIST and tcng-tests RPM include run-all-tests
- removed toys/cbq and toys/if
- updated toys/cspnest and toys/tunnel to use new syntax
- -E -E now reports negation only when encountering it (tests/bittest)
- expressions without relational operator are automatically treated as X != 0
  (added in 6o; tests/bittest)
- iflib_not optimizes double negation and single bit tests (tests/bittest)

Version 6p (23-OCT-2001)
------------------------

- switched tcc to exclusively use new syntax (also affects meters.tc and
  var2fix.pl)
- cleaned up syntax for classes, filter specifications in selections, and the
  two "... if" cases previously requiring %prec
- updated tests/newsynmsc and tests/semicolon accordingly
- fixed minor glitch in tests/extrasemi
- updated tcc/LANGUAGE

Version 6o (23-OCT-2001)
------------------------

- tcc/tcng.y: changed rules for assignments, qdiscs bodies, class bodies,
  filter bodies, and selector lists from right-hand side to left-hand side
  recursion to avoid overflowing YACC stack
- tests/misfeatures: noted that dsmark with class selection paths gets confused
  if nounspec is set, the classification is not self-contained, and
  default_index points to a non-existent class number
- changed /.*something.*/ to /^.*something.*/ in sed regexps of tests/buckfill
  and tests/tcng-6j, making the tests up to four times faster (this was the
  "very slow tcsim send" bug)
- tcc: -N -N didn't switch to "old" algorithm
- tcc: -N -N -N switches to common "access rel constant" conversion algorithm
  iflib_arith:rel_access (tests/access)
- dump_failed now prints shorter "can't dump subexpression", and optionally
  the reason of failure instead of the line number
- updated tests/additive, tests/access, tests/misfeatures, and tests/tcng-5q
  accordingly
- changed if_u32.c:dump_eq and if_ext.c:dump_match to handle multiple ands
  (previously filtered by iflib_red.c:optimize_eq)
- tcng.l used strtol to parse uint32_t, limiting all integer literals to 31
  bits (tests/tcng-6o)
- tcsim's cfg.l used strtol to parse binary uint32_t (tests/tcng-6o)

Version 6n (20-OCT-2001)
------------------------

- "tag" parameter did not accept expressions (tests/tcng-6n)
- "pragma" parameter did not accept expressions (tests/tcng-6n)
- tests/misfeatures: "pragma" should accept normal expressions, not only
  primary expressions
- tcc/meters.tc.in: all meter definition macros (set_*) now have optional
  parameters "tag" and "pragma" to set the tag and one pragma for the buckets
  generated (only with new syntax; tests/mettagpra)
- moved old TCM examples in toys/srtcm.tc and toys/trtcm.tc to tests/pol_ext
- tcng tests bindist and tcng-tests RPM no longer include toys/srtcm.tc and
  toys/trtcm.tc
- prio now automatically raises default for "bands" parameter if necessary
  (tests/bands)
- updated tests/tcng-4u accordingly

Version 6m (20-OCT-2001)
------------------------

- scripts/runtests.sh now invokes tcc with -S -S -S, and tcsim with
  -Xc,-S -Xc,-S -Xc,-S -DTCNG_SEMICOLON
- converted examples-ng/* to new syntax
- converted tcc/example to new syntax
- converted toys/srtcm.tc and toys/trtcm.tc to new syntax
- de-crowded tests/arith, tests/host, tests/misfeatures, tests/named,
  tests/tcng-1i, tests/tcng-1j, tests/tcng-1o, tests/tcng-2f, and tests/tcng-3g
- converted all regression tests to new syntax
- removed ambiguous syntax tests from tests/misfeatures
- removed ugly old syntax tests from tests/newsynmsc and tests/semicolon
- tests/tcng-5y showed spectacular failure of old syntax, with subtle syntax
  ambiguity leading to subtle error in generated classifier
- TODO: removed entry for mythical __ file bug

Version 6l (19-OCT-2001)
------------------------

- extra semicolons are now allowed where one semicolon or a block end appears,
  e.g. ;;; is equivalent to ; and }; is equivalent to } (tests/extrasemi)
- new syntax requires interface sections to be enclosed by curly braces
  (tests/newsynmsc)
- new syntax does no longer allow filters specified in selectors to have their
  own blocks (tests/newsynmsc)
- tcc now handles both old-style and new-style syntax for filters specified in
  selectors (tests/newsynmsc)
- updated tests/semicolon accordingly
- documented new syntax in tcc/LANGUAGE
- tcc.c:main did not allocated room for -DTCNG_*SEMICOLON in cpp argv, causing
  tcc to segfault if invoked without arguments
- empty tags are now ignored (updated tests/tcng-5a accordingly)
- empty pragmas are now ignored (updated tests/pragma accordingly)
- tags can now also be specified as "tag <string>" (updated tests/tag)
- strings are now first-class data types in the tcng language, can be compared
  with relational operators, and can be concatenated with + (tests/string)
- updated tcc/LANGUAGE accordingly
- "host" can now be followed by an expression, not only a host name or IPv4
  address (tests/named2)
- host, port, ipproto, and (ether) protocol parameters can now be also use
  strings expression, not just string literals or numeric expressions
  (tests/named2)
- variables now record the location where they are created, yielding much
  better location information in warnings
- updated tests/location, tests/selpath, tests/tcng-3k, tests/tcng-5c,
  tests/varredef, tests/waprpos, and tests/warn accordingly
- syntax changes changed the location indicated in some error messages. Updated
  tests/named accordingly
- tcc/LANGUAGE: split parameters section to cover expressions in their own
  section

Version 6k (19-OCT-2001)
------------------------

- fixed precond() example in tcc/LANGUAGE (reported by Ronald Murphy)
- tcng language will soon require semicolons at the end of constructs, unless
  they end with a block, e.g.  $x = 5  will be  $x = 5;  fifo  will be  fifo;
  but  prio { ... }  will stay the same
- tcc can help migration with the undocumented -S option: without -S, behaves
  like it did before, with -S it warns when using semicolons (for comments),
  with -S -S semicolons no longer begin comments, and tcc warns if a semicolon
  is missing somewhere, and with -S -S -S missing semicolons yield an error
  (tests/semicolon)
- updated fields.tc accordingly (remains backwards-compatible)
- tcc adds -DTCNG_NOSEMICOLON to CPP options if no or only one -S it set,
  -DTCNG_SEMICOLON if more than one -S is set
- meters.tc is now generated via macro-generating preprocessor
  scripts/var2fix.pl
- updated meters.tc such that it is generated to contain a part with, and one
  without semicolons (new files meters.tc.in and meters_nosemi.tc.in)
- duplicate global pragma location is reported more accurately
- updated tests/waprpos accordingly

Version 6j (17-OCT-2001)
------------------------

- Makefile: "tcc" has no dependency on "symlink", breaking RPM build in 6i
- tcc/location.c:file_open printed wrong file name on error
- meters.tc: trTCM_red fell through if packet conformed to Tc, but not to Tp
  (tests/tcng-6j)
- if_ext_act.c:add_actions gave up too quickly when encountering unusual
  expressions (tests/tcng-6j)

Version 6i (17-OCT-2001)
------------------------

- tcc and tcsim now print CPP's path if CPP isn't found (reported by Jacob)
- tcng-tests RPM no longer includes tests/usage, which can safely be tested in
  a regular build environment, and is very location-dependent 
- fields.tc: renamed fields "ip", "tcp", etc. to "ip_hdr", "tcp_hdr", etc.
- updated tests/classvar, tests/field, tests/tcng-4n, and tests/tcng-5y
  accordingly
- described now consistent field naming convention in tcc/LANGUAGE
- tcm.tc now fails with an #error (was #warning) and will be removed very soon
- updated TODO

Version 6h (15-OCT-2001)
------------------------

- unless -B is set: -N is now enabled by default, and double -N switches off
  -N (to reuse old regression tests for a while)
- updated tests/buckfill, tests/classvar, tests/expensive, tests/fastpath,
  tests/relop, tests/tcng-5j, tests/tcng-5y, and tests/tcng-5z accordingly
- build/tc{ng,sim}.spec.in: %doc came before %defattr, which caused
  documentation files to pick up wrong ownership
- meters.tc was not compatible with SuSE's CPP that identifies itself as
  CPP 2.95.2 but appears to be different from the CPP that comes with GCC
  2.95.2

Version 6g (15-OCT-2001)
------------------------

- tcc: moved generation of location map and variable use list before build
  phase, so external programs can use these files
- doc/external.tex: clarified that tokens need to be added to a bucket not only
  on "conform", but also on "count".
- removed corresponding (rather obscure) tests from tests/misfeatures
- tcc/ext/match.c and tcc/tcm_cls.c now refill buckets on "count" too
  (tests/buckfill)
- iflib_red.c:prune_shortcuts sometimes removed count in "count ... || 1"
  (tests/buckfill)
- tcm_cls.c now prints policer state if DEBUG is #defined
- added correct solution for double count test, and failure of "old" algorithm
  (tests/misfeatures)

Version 6f (12-OCT-2001)
------------------------

- updated path to fields.tc in tcc/LANGUAGE
- added function "precond" that evaluates the preconditions of its argument
  (tests/precond)
- added regression tests for bit and other sub-byte fields (tests/subbyte)
- fixed subtle pointer aliasing issues in field.c

Version 6e (12-OCT-2001)
------------------------

- updated kernel version example on tcng/README from 2.4.10 to 2.4.12
- configure is now compatible with 2.4.12 and 2.4.13 (pre-release, tested with
  pre1)
- added #warning to tcm.tc, telling users to switch to meters.tc
- added test for count-count crash with -N -B to tests/misfeatures
- scripts/runtests.sh now searches PATH for executables
- build/Makefile: "variable" expansion sed scripts only expanded first
  occurrence of "variable"
- TCSIM_BINDIST and tcsim-devel now also contain header files from
  ulib/iproute2/include*, ulib/iproute2/tc/tc_{util,core}.h, toys/?rtcm.tc,
  and all examples
- tcc/ext/tcc-ext-test is now relocatable via TCNG_TOPDIR
- make tcsim-rpms  now also generates tcng-tests RPM
- trimmed usage lines of tcc and tcsim to avoid wrap-around if installed at
  default location

Version 6d (11-OCT-2001)
------------------------

- added more regression tests for fields (tests/field2)
- fields in variables were expanded too early, i.e. at the time of assignment
  instead of at the time of use (moved tests from tests/misfeatures to
  tests/tcng-6d)
- pseudo parameter names for meter macros can now be macros themselves
  (added tests to tests/meters)
- updated tests/expensive, tests/fastpath, and tests/tcm to use meters.tc
  instead of tcm.tc

Version 6c (11-OCT-2001)
------------------------

- meters.tc: set_SLB sometimes used __dlb_ names, causing a variable
  uninitialized error (tests/tcng-6c)
- added tests for SLB and DLB macros, and the set_* macros of srTCM and trTCM
  (tests/meters)

Version 6b (11-OCT-2001)
------------------------

- tcng expression syntax didn't include unary minus, oops :-) (tests/tcng-6b)
- tcc/LANGUAGE acknowledges that there are "standard" header files and naming
  conventions
- added tcc/meters.tc with improved TCM macros and single/double leaky bucket
  macros, obsoleting tcm.tc
- fields in variables are expanded too early, i.e. at the time of assignment
  instead of at the time of use, which can cause problems with preconditions
  (tests/misfeatures)
 
Version 6a (10-OCT-2001)
------------------------

- extended tests/relop to check range 0-31 (was 0-16) to ensure better coverage
  of upper bits
- tcc, tcsim: added -X phase "p" for tcc's cpp (tests/phasep)
- tcng: the "warn" directive can now appear anywhere where variables or fields
  are allowed (tests/waprpos)
- tcng: the global pragma can now appear after global variables, fields, or
  "warn" directives (tests/waprpos)
- updated tcc/LANGUAGE accordingly, described pragmas, and renamed the
  "preamble" to "processing directives"
- tcng no longer allows the empty string as a pragma value (tests/pragma)
- tccext.c included keyword "pragma" among pragma values for qdiscs and classes
  (updated tests/pragma)
- tcng/README now recommends to download iproute2-2.2.4-now-ss001007.tar.gz
  instead of iproute2-current.tar.gz (this also affects build/tcsim.spec)
- build/Makefile: target "all" now depends on "rpmstuff"

Version 5z (10-OCT-2001)
------------------------

- "C" target didn't support < or >= (tests/tcng-5z)
- iflib_bit.c did not recognize matches with values larger than the field size
  as always false (tests/tcng-5z)
- tcc can now translate relational operators with arbitrary constants
  (tests/relop)
- added list of unfiled items to TODO

Version 5y (9-OCT-2001)
-----------------------

- new option -Wexpensive to warn about expensive operations (as opposed to -E,
  which yields a fatal error; added tests to tests/expensive)
- variables can now be re-defined, just like fields (tests/varredef)
- new option -Wredefine (tests/varredef)
- updated tcc/LANGUAGE accordingly
- iflib_red.c:bundle could not handle multiple optimizations at the same level
  and has fence-post error when optimizing expressions of the type (ab || a)
  (tests/tcng-5y)
- updated tests/not accordingly
- oops, build/dummy.spec was never added (since tcng-5v)

Version 5x (5-OCT-2001)
-----------------------

- util.c: new function alloc_sprintf that acts as asprintf with error handling
- fixed about a dozen potential buffer overflows, many of them by using
  alloc_sprintf
- if_c.c: changed asserts on bucket/result overflow to errorf; moved array size
  definitions to config.h
- updated tests/additive according to above changes
- added and enabled data_destroy and data_destroy_1
- fixed calls to data_destroy* iflib_act.c and iflib_arith.c, and access after
  destroy problems in iflib_red.c

Version 5w (5-OCT-2001)
-----------------------

- new external program tcc-ext-file that writes the configuration data to the
  file specified with -Xx,file=<name>
- added tcc-ext-file to binary distributions
- child termination detection in tcc/ext_io.c was unnecessarily complicated and
  caused a race condition between child termination and processing of errors
  reported by child

Version 5v (4-OCT-2001)
-----------------------

- changed the names of filter.pl and plot.pl to tcsim_filter and tcsim_plot,
  respectively
- updated tcsim/README, scripts/symlinks.sh, scripts/runtests.sh,
  tests/pol_traffic, tests/tbf, tests/tcng-3i, and tests/usage accordingly
- scripts/runtests.sh: changed trinity.sh to "trinity" in order to eliminate
  last remaining bash-ism
- updated tests/ext, tests/tcng-2u, and tests/usage accordingly
- build/tcng.spec.in: split tcc RPM into tcc and tcc-devel
- added echoh.h to tcc-devel RPM
- Makefile: changed dependencies on ".distisuptodate" to the equivalent "dist"
- Makefile: added target "rmaltdist" to remove all binary distributions in
  tar.gz files or in RPMs, and any SRPMs, leaving only source distributions
  created with "make dist"
- "make rpm" now symlinks tcng source instead of copying it
- added experimental spec file build/tcsim.spec.in and helper file
  build/dummy.spec to build tcsim RPM (use with  make tcsim-rpms )
- Makefile: re-structured RPM-related targets
- TCSIM_BINDIST now also includes directories lib/tcng/include/klib/include and
  lib/tcng/include/klib/kernel/include
- added missing dependency of tcsim on symlinks

Version 5u (3-OCT-2001)
-----------------------

- TODO: removed obsolete remark about bubble_and
- tcc: removed obsolete options -A, -C, and -F
- tcc: new option -W[no]... to enable/disable specific warnings
- -Wtruncate enables warning when truncating value ranges (disabled by default;
  used to be always enabled)
- updated tests/tcng-2e accordingly
- -Wnounused disables unusued variable warning (enabled by default)
- updated tests/devbra and tests/tcng-5g (also removing several of useless -w),
  and tests/extlocbas and tests/misfeatures accordingly, i.e. by changing -w to
  -Wnounused
- tcng: new construct "warn [no]warning,..." to include -W options in
  configuration files (tests/warn)
- duplicate class selection paths are now valid, and are treated as distinct
  classes at top-level dsmark, in order to allow use of marking at top-level
  dsmark (tests/selpathdup)
- removed duplicate class selection path test from tests/selpath

Version 5t (3-OCT-2001)
-----------------------

- tcc/ext/tccext.* added field "location" to TCCEXT_BLOCK, TCCEXT_QDISC,
  TCCEXT_CLASS, and TCCEXT_BUCKET, containing pre-formatted location string
- tcc/ext/echoh.*: added function echoh_buckets to print buckets
- tcc/ext/echoh.* now prints an error with location information and exits, if
  encountering pragma "force_failure"
- added regression tests for error feedback (tests/extlocext)
- tcc/ext/tccext.c:tccext_destroy did not free block->name
- tcc/ext.c no longer uses yyerror, because it's usually invoked either before
  parsing the first line or at EOF anyway
- removed tccext output formatting from TODO

Version 5s (3-OCT-2001)
-----------------------

- location specifications enclosed in [<...>] in standard error from external
  programs are now translated by tcc back to source code locations
  (tests/extlocbas)
- added new external program tcc-ext-xlat used by tests/extlocbas
- -Xx,fifos no longer attaches fifos to numbered dsmark classes (tests/tcng-5s,
  reported by Jacob)
- tcc now prints "expression" as the value of non-constant variables
  (tests/tcng-5s)
- updated tcc/README accordingly
- child process for external program executed exit handler, causing attempt to
  unlink input file twice, which failed, and output file was not deleted as a
  consequence (tests/tcng-5s, reported by Jacob)
  
Version 5r (2-OCT-2001)
-----------------------

- configure is now compatible with 2.4.11 (pre-release, tested with pre2)
- tcsim/setup.klib: added MODULE_LICENSE to include/linux/module.h for 2.4.11
  compatibility
- added targets "ephemeral", "dep", "depend", and "clean" to build/Makefile
- added "build" to DIRS in top-level Makefile, in particular so that
  "make ephemeral" now descends into "build"
- Makefile and scripts/Makefile: added "all" to .PHONY
- doc/Makefile: added .PHONY

Version 5q (2-OCT-2001)
-----------------------

- q_gred.c: changed diagnostics to provide better location data
- added set of regression tests for GRED error detection (tests/grederr)
- q_gred.c tested for presence of qdisc parameter "grio" in class scope
  (tests/grederr)
- q_prio.c: changed diagnostics to provide better location data
- updated tests/tcng-1i, tests/tcng-1j, and tests/tcng-4u accordingly
- q_dsmark.c:sel_add_hier_filters "return"ed when encountering GRED, instead of
  "continue"ing, thereby possibly skipping other qdiscs (tests/tcng-5q,
  reported by Jacob)
- updated tests/selpathgred accordingly
- iflib_act.c:bubble_and now explicitly checks for invalid condition
  (tests/tcng-5q)
- updated tests/misfeatures accordingly
- tcc/LANGUAGE: clarified role of parent classes within the same qdisc in class
  selection path
- added set of regression tests for class selection paths with CBQ
  (tests/selpathcbq)

Version 5p (28-SEP-2001)
------------------------

- tcc/LANGUAGE: documented variables containing expressions
- tcc now refuses interface names longer than IFNAMSIZ-1 (15) characters
  (tests/ifnamsiz)

Version 5o (28-SEP-2001)
------------------------

- variables can now contain expressions (tests/varexp)

Version 5n (27-SEP-2001)
------------------------

- added portable default value for BuildRoot to build/tcng.spec.in

Version 5m (26-SEP-2001)
------------------------

- tcc.spec.in: added LGPL to "copyright" tag
- tcc.spec.in used COPYING instead of COPYING.{GPL,LGPL}
- tcc.spec.in: RPM_BUILD_ROOT test for / had logic reversed
- copied copyright information from tcng/README to tcng/tcc/README
- "make rpm" now moves RPM file to tcng top-level directory and removes
  directory "rpm" after use
- "make clean" now removes directories "build-test" and "rpm"
- "make rpm" now generates a relocatable RPM, and also the SRPM for tcng
- moved bytesex.c and tcc.spec.in to new directory tcng/build
- updated tcng/configure accordingly
- moved setting of topdir from tcc.spec.in to build/rpmrc and build/rpmmacros
  (see build/README for details)

Version 5l (25-SEP-2001)
------------------------

- scripts/symlinks.sh still created obsolete links to kmod_cc and tcmod_tcc in
  tcng/bin
- tcc-ext-test.in still expected kmod_cc and tcmod_cc in $TOPDIR/bin, not
  $TOPDIR/lib/tcng/bin
- scripts/localize.sh now allowed environment variable TCNG_INSTALL_CWD to
  override its notion of the current directory
- "make all" and "make install" now automatically skip tcsim if disabled in
  configuration
- added tcc RPM spec file tcng/tcc.spec.in, and Makefile target "rpm"

Version 5k (25-SEP-2001)
------------------------

- added assorted regression tests using class variables (tests/classvar)
- new directory locations:
  - tcc-module, tcc-ext-err, kmod_cc, and tcmod_cc now go into
    $TOPDIR/lib/tcng/bin instead of $TOPDIR/bin
  - libtccext.a, tcm_cls.c, and tcm_f.c now go into $TOPDIR/lib/tcng/lib
    instead of $TOPDIR/lib
  - tccext.h, echoh.h, fields.tc, ip.def, tcngreg.def, and the symbolic links
    to tcsim/klib and tcsim/ulib now go into $TOPDIR/lib/tcng/include instead
    of $TOPDIR/include
- updated scripts/symlinks.sh, Makefile, scripts/localize.sh, tcc/tcc.c,
  tcc/if_c.c, tcc/tcc-module.in, tcc/ext/tcc-ext-test.in, tcsim/tcsim.c,
  tcsim/modules/kmod_cc.in, and tcsim/modules/tcmod_cc.in accordingly
- moved toys/tcm.tc to tcc/tcm.tc (and $TOPDIR/lib/tcng/include)
- updated tests/expensive, tests/fastpath, and tests/tcm accordingly
- tcc/ext_io.c now adds $TOPDIR/lib/tcng/bin to the PATH
- removed now unnecessary PATH=$PATH:tcc/ext from the following tests:
  arith, bitopt, cbqroot, classvar, defifo, drop, dsind, expensive, ext,
  extcbq, extflt, extmult, extndm, extqch, fastpath, field, fredef, location,
  misfeatures, not, phasex, pol_ext, setpathext, tcm, tcng-2u, tcng-3b,
  tcng-3h, tcng-3m, tcng-3n, tcng-3p, tcng-3r, tcng-3s, tcng-4a, tcng-4c,
  tcng-4d, tcng-4f, tcng-4h, tcng-4j, tcng-4l, tcng-4n, tcng-4p, tcng-4u,
  tcng-4w, tcng-4z, tcng-5a, tcng-5j, and unspec
- updated kernel version example on tcng/README from 2.4.9 to 2.4.10
  
Version 5j (25-SEP-2001)
------------------------

- iflib_red.c: added debbugging function to dump matrix considered by "bundle"
- iflib_red.c:bundle_skip effectively limited bundling to one level
- updated tests/not and tests/tcng-2j accordingly
- iflib_red.c: changed order of transformations when using -N so that common
  uses of trTCM can be optimized too (tests/fastpath)
- ext_all.c: _root hack came back to bite us when using multiple interfaces
  (tests/tcng-5j)
- iflib_cheap.c: rewrote detection of expensive combination of static
  classification and policing (tests/expensive)

Version 5i (21-SEP-2001)
------------------------

- tcc: it is now an error to try to use the obsolete options -A, -C, and -F
- updated tests/defifo and tests/location accordingly
- iflib_red.c:bubble_or removed incorrect comment about side-effect of
  iflib_act.c:self_contained
- tcc: added new option -E to make tcc fail if encountering an "expensive"
  operation, such as negation (either explicitly or via !=, > or >=), or an
  action tree that is not self-contained (tests/expensive; suggested by Jacob)
- iflib_red.c:bubble_or now more aggressively eliminates right-hand side of
  logical and
- README and configure: tcc is not compatible with kernel versions < 2.4.3

Version 5h (20-SEP-2001)
------------------------

- tcc/iflib_red.c:iflib_normalize no longer bubbles actions through static
  classification in expressions ending in  ... && (conditions || decision)
  (tests/fastpath; only with -N; suggested by Jacob)
- tcc/iflib_red.c:iflib_normalize makes expressions typical in simple multi
  color markers self-contained, thereby making above optimization possible in a
  wider range of cases (only with -N; tests/fastpath)
- toys/tcm.tc: added constrained versions of the color test macros, which tcc
  can process more easily.
- if_ext.c: removed redundant pass through iflib_normalize when using the "old"
  algorithm

Version 5g (19-SEP-2001)
------------------------

- "make spotless" did not imply "make clean", leaving e.g. .symlinks
- TODO: documented tests/selpathgred incompatibility with older kernels
- added device and tunnel data types to simplify implementation of variable use
  scope information output
- variable use output (-u) now includes scope information
- updated tcc/README, tests/tcng-5f, and tests/varuse accordingly
- filters had no blank between "filter" and identifier in variable use output
  (tests/tcng-5g)
- added more precise location information to CBQ error messages (suggested by
  Jacob)
- updated tests/cbqroot accordingly

Version 5f (19-SEP-2001)
------------------------

- tcsim/setup.klib: added max_t for compatibility with recent 2.4.10
  pre-releases
- tcc/LANGUAGE: clarified that class selection paths cannot be nested (see
  toys/cspnest)
- tcc did not suppress pseudo-parameter "class_sel_path" in tccext output
- added regression tests for class selection path with external interface
  (tests/selpathext)
- ext_all.c now issues a warning when defaulting to CBQ root class (suggested
  by Jacob)
- scripts/cvsupdate.sh: added option -n to avoid accidental file changes
- class selection path data structures are now deallocated after use
- class selection paths now also work with GRED (tests/selpathgred)
- tcc/README: CBQ support is no longer "untested" (spotted by Gautam Thaker)
- tcc/iflib_act.c: self_contained did not handle constants or op_count
  correctly, was too optimistic with logical or, and did not consider that
  boolean operations involving self-contained subexpressions constrain their
  possible values, even though they may not be self-contained themselves
- tcc/iflib_red.c:bubble_or no longer tries to "normalize" actions, because
  iflib_act.c:push_action has to re-arrange them anyway (experimental)
- tcc/iflib_act.c: added function trim_self_contained to remove self-contained
  sub-expressions before doing anything else (experimental, may be redundant)
- variable use list did not include forward-declared variables (tests/tcng-5f,
  reported by Jacob)
- undocumented tcc command-line option -N now sets general algorithm mode (also
  for old algorithm) and no longer implies -B

Version 5e (14-SEP-2001)
------------------------

- updated TODO to reflect changes in version 5d
- last two entries were missing in CHANGES section of version 5d
- tcc/README: documented the -u option
- tcc/LANGUAGE: documented class selection paths

Version 5d (13-SEP-2001)
------------------------

- added experimental <...> construct to automatically generate tcindex-based
  classification system in conjunction with dsmark (tests/selpath)
- made dsmark "indices" parameter optional
- mask and value parameters that are equivalent to default values are ignored

Version 5c (11-SEP-2001)
------------------------

- tcc: new option  -u var_use_file  to write content of variables to the
  specified file (tests/varuse)
- variables before first implict device now really have global scope
  (tests/tcng-5c)
- unused global variables are reported at end of file (tests/tcng-5c)
- updated tests/tcng-3k accordingly
- tcsim/plot.pl: added PNG (-png) and JPEG (-jpeg) output (based on patch by
  Gautam and Nikhil Thaker)
- dsmark no longer complains if class with a number above "indices" sets "mask"
  or "value" to values that imply no change (tests/dsind)
- dsmark: "indices" is now optional, and set to the next power of two above the
  highest class number (tests/dsind)
- q_dsmark.c: changed diagnostics to provide better location data
- updated tests/tcng-1i accordingly
- configure now exits on the first error
- tcsim/Makefile.ulib now invokes further makes with -e, to facilitate
  cross-compilation (reported by Langie Light)

Version 5b (8-SEP-2001)
-----------------------

- added new debugging function debugf2 that prints if debug > 1
- scripts/symlinks.sh no longer prints the names of directories in "list" mode
  (this broke "make spotless")
- added "new" bit graph algorithm in tcng/tcc/iflib_newbit.c (it's completely
  useless at the moment)
- tcc: new undocumented option -N to select "new" bit graph algorithm

Version 5a (30-AUG-2001)
------------------------

- added helper functions for run-time measurement (start_timer, print_timer)
- fixed uninitialized variable bug in tcc/if_u32.c:dump_offset
- fixed harmless uninitialized variable warnings in
  tcc/iflib_bit.c:{dump_static,dump_all_paths_to}
- file names containing blanks or other unprintable characters are now printed
  as <unprintable> in location map (tests/tcng-5a)
- empty strings are no longer allowed as tags (tests/tcng-5a)
- added new reporting functions lwarn and lwarnf
- changed most yy{error,warn}* to l{error,warn}* in ext_all.c, if_c.c, and
  if_ext.c
- updated tests/additive, tests/extcbq, tests/extflt, and tests/extndm
  accordingly
- iflib_bit.c now validates reference counts after all major operations unless
  NDEBUG is defined
- iflib_bit.c:{bubble_static,swap_bits} were badly broken (tests/tcng-5a,
  reported by Jacob)
- when debugging (-d), iflib_bit.c:unique_state validates that all bit types
  are still valid (they become invalid if free'ing a bit still in use)
- unique_state now eliminates bits when discovering that they are redundant
  (bit->true == bit->false), yielding more compact results
- adapted tests/tcng-4p accordingly

Version 4z (29-AUG-2001)
------------------------

- tcc/police.c:assign_policer_ids was only invoked once, but more policers
  could be defined afterwards (tests/tcng-4z, reported by Jacob)
- configure, scripts/runtests.sh, and scripts/symlinks.sh assumed that the
  shell looks for files to source in the current directory instead of following
  the PATH if no explicit path is given (reported by Jacob)
- configure now reports loading defaults from old config file
- configure is now compatible with 2.4.10 (pre-release, tested with pre2)

Version 4y (24-AUG-2001)
------------------------

- tcsim/setup.klib generated include/linux/in.h with byte order hard-coded to
  little endian
- tcsim/modules/kmod_cc.in, tcsim/modules/tcmod_cc.in, and tcc/ext/tcc-ext-test
  now look for environment variable CC before using hard-coded default of "cc"
  (was "gcc")
- bindist-tcng-tests now also includes various files from tcc/ext and
  tcsim/modules
- tcc did not consider empty strings ("") to be strings at all (reported by
  Jacob)
- setup.klib generated netfilter.h with unnamed struct, causing warnings with
  some versions of gcc
- described input file format in scripts/runtests.sh
- scripts/runtests.sh now automatically inserts FILE directives if multiple
  input files are specified on the command line

Version 4x (23-AUG-2001)
------------------------

- removed useless -I- from tcsim/Makefile
- new binary distribution target bindist-tcng-tests added (not generally useful
  yet)
- extended scripts/runtests.sh to take TOPDIR and TCNG_TOPDIR from the
  environment, and to use reasonable defaults if "config" is absent
- modified scripts/trinity.sh.in to use environment variable TCNG_TOPDIR (if
  present) instead of configured-in TOPDIR
- Makefile: added target "scripts" (how did scripts/trinity.sh ever get built
  without ??)
- changes names of binary distribution files from <component>-<version>.tar.gz
  to <component>-<version>-bin.tar.gz
- tcc/config.h:TCC_MODULE_CMD always used hard-coded TOPDIR instead of allowing
  TCNG_TOPDIR override
- configure: new options --big-endian (-b) and --little-endian (-l) to set the
  bytesex
- configure: now also "inherits" bytesex from old config file

Version 4w (22-AUG-2001)
------------------------

- fixed a few glitches in the CHANGES section of 4v
- updated tcsim/setup.klib to handle max(type,a,b) macro introduced in 2.4.9
- updated kernel version example on tcng/README from 2.4.7 to 2.4.9
- fields now have scoping, like variables (tests/tcng-4w)
- updated tests/misfeatures and tests/fredef accordingly (moved old misfeature
  test to tests/tcng-4w, but moved one now broken test from tests/fredef to
  tests/misfeatures and added new tests for similar problem with variables)
- devices now have optional braces around their qdiscs in order to avoid
  ambiguous variable scope (tests/devbra)
- updated tcc/LANGUAGE according to the two changes above
- tcc: added option -w to suppress all warnings

Version 4v (22-AUG-2001)
------------------------

- configure: added option --no-tcsim (abbreviation -n) to enable build of tcc
  only
- top-level make now refuses all targets depending on tcsim, and build-test if
  tcsim is disabled in configuration
- removed unnecessary inclusion of ../../config from tcsim/modules/Makefile
  (caused complaint on  make cvsupdate  in virgin tree)
- scripts/symlinks.sh now sources "config" only if linking (unconditional
  sourcing caused complaint on  make cvsupdate  in virgin tree)
- tcc now sorts sibling classes by class ID (tests/sort; suggested by Jacob)
- updated tests/extqch accordingly
- tcc now allows fields to be re-defined wherever one can put a variable
  assignment (tests/fredef)
- known bug: fields still have global scope (tests/misfeatures)

Version 4u (16-AUG-2001)
------------------------

- configure is now compatible with 2.4.9 (pre-release, tested with pre4)
- tcc/README: "Invocation" section was obsolete and incorrect (reported by
  Mika Yrjola)
- added realistic tcc example in tcc/example
- tcsim: added option -c to perform only syntax check
- new test tests/examples checks all examples in examples/*, examples-ng/*, and
  tcc/example for correct syntax
- tcsim/setup.klib now skips cls_u32.c patch applied somewhere in 2.4.8-pre*
- dump_if_u32 now also handles negation
- updated tests/tcng-3g accordingly
- location map used "file:line", not "file line" as described in README
- location map now uses "-" instead of empty string to indicate stdin.
  Clarified tcc/README accordingly.
- updated tests/location and tests/tag according to above changes
- dsmark did not adjust parent qdisc when resolving class 0 collision
  (tests/tcng-4u)
- inner qdisc of explicit CBQ root class was not dumped on tc (tests/tcng-4u)
- CBQ messed up order of filters on parent and root (which are the same), so
  now tcc refuses this bizarre combination (tests/tcng-4u)
- -B now sorts bits (in a very ugly way), just like without -B (tests/tcng-4u)

Version 4t (10-AUG-2001)
------------------------

- split make target "bindist" into "bindist-tcc" and "bindist-tcsim"
- added missing target "tcsim" to tcng/Makefile

Version 4s (9-AUG-2001)
-----------------------

- "make clean" in tcng/tcsim tried to access klib/ulib, which may not exist
  after partial build
- forgot to include scripts/localize.sh in distribution

Version 4r (9-AUG-2001)
-----------------------

- added tcng/tcc/ext/tcc-ext-err to tcng/bin
- modified tcc/tcc.c, tcc/tcc-module.in, tcsim/tcsim.c,
  tcsim/modules/kmod_cc.in, and tcsim/modules/tcmod_cc.in to use environment
  variable TCNG_TOPDIR (if present) instead of compiled-in TOPDIR
- added option --install-directory (or -d) to configure
- added "make install" target and "make bindist" targets
- new script scripts/localize.sh to generate wrapper scripts for tcc and tcsim
- tcc/Makefile now uses scripts/topdir.sh to build tcc-module
- described installation procedure in tcng/README

Version 4q (9-AUG-2001)
-----------------------

- added new target "ephemeral" to most Makefiles
- added new target "cvsupdate" to top-level Makefile, which removes ephemeral
  files from CVS' list
- added scripts scripts/cvsupdate.sh invoked for above target
- added new target "bindist" to top-level Makefile to build binary
  distributions of tcc and tcsim
- scripts/symlinks.sh now accepts the mode of operation as its first argument
  ("list" or "link")
- fixed various files forgotten by "make clean" and such

Version 4p (8-AUG-2001)
-----------------------

- optimized iflib_bit.c:clear_counters (from O(2^N) worst-case to O(N))
- added new field BIT.dump_number to optimize iflib_bit.c:deassign_numbers
  (from O(2^N) worst-case to O(N))
- slightly improved heuristic used by iflib_bit.c:pick_best to produce up to
  80% fewer matches
- updated tests/tcng-3r accordingly
- copy_list selected first, not last common node, confusing eliminate_bundle
  (tests/tcng-4p)
- tcng/tcc/Makefile did not use CC_OPTS (from tcng/Common.make)

Version 4o (7-AUG-2001)
-----------------------

- added more compact test case for bug fixed in 4n (tests/tcng-4n)
- added more precise location information to dsmark_default_class error message
- updated tests/defdsm accordingly
- dsmark failed to merge auto-generated class 0 with explicitly specified class
  0, yielding duplicate class 0 (tests/tcng-4o; reported by Jacob)
- tccext.c did not find nested classes and therefore erroneously created dummy
  classes (tests/tcng-4o; reported by Jacob)
- fixed tests/extqch accordingly

Version 4n (3-AUG-2001)
-----------------------

- tcc/iflib_bit.c:swap_bits did not distinguish true and false, causing tcc to
  crash (tests/tcng-4n)

Version 4m (3-AUG-2001)
-----------------------

- tests/location did not include test for ingress qdisc
- error.h: added new error reporting functions lerror, lerrorf, vlerrof
- improved reporting of error location in parameter handling
- updated tests/tcng-2e accordingly

Version 4l (30-JUL-2001)
------------------------

- broke if_ext.c down into individual functions allowing to dump exactly what
  is needed in each mode
- updated tests/extmult accordingly; added bucket test to tests/extmult
- tccext.h: renamed TCCEXT_ACTION.u.classes to class_list to avoid ambiguity
  with TCCEXT_QDISC/TCCEXT_CLASS.classes (suggested by Jacob)
- updated tccext.c, echo.c, and match.c accordingly
- configure is now compatible with 2.4.8 (pre-release)
- tccext.c now detects duplicate items on input (tests/dupext)
- tcc-ext-echo used to loop if there was more than one bucket (tests/tcng-4l)
- tcc: renamed DEVICE.qdisc to DEVICE.egress
- -A ("all") no longer requires use of if to generate code (tests/tcng-4l)

Version 4k (24-JUL-2001)
------------------------

- tcc: undocumented options -A, -C, -F now print warning
- tcc-ext-test now accepts "nounspec" argument, and echoes it in config mode
- updated tests/defcbq, tests/defdsm, tests/defifo, tests/extflt,
  tests/extmult, tests/extndm, tests/extqch, tests/location, tests/pragma,
  tests/tcng-3m, tests/tcng-3s, tests/tcng-4a, tests/tcng-4d, tests/tcng-4f,
  and tests/unspec to no longer use undocumented options, or to suppress the
  warning
- callers of scripts/runtests.sh can now pass file name information using a
  FILE <file_name> directive
- q_cbq.c now always generates an explicit root class, if none is present
  (tests/cbqroot)
- updated tests/extndm, tests/extqch, tests/location, tests/tcng-1n,
  tests/tcng-2c, tests/tcng-2h, and tests/tcng-4f accordingly
- q_cbq.c combines the root class with the qdisc when generating tc output
  (tests/cbqroot)
- qdisc.c:make_class did not initialize all fields of new class, causing stray
  problems with require_class

Version 4j (24-JUL-2001)
------------------------

- tccext: moved actions and rules from global scope to block scope
- updated tccext.h, tccext.c, echo.c, and tests/tcng-3s accordingly
- tcc/ext/match.c now detects and refuses multiple blocks (at run-time)
- tcc/ext/echo.c now prints offsets and buckets before blocks, to maintain at
  least some resemblance of order
- updated tests/pragma, and tests/tcng-3s accordingly
- suppressed cross-block sharing in if_ext_act.c (tests/extmult)
- CHANGES: tcng-4h entry for iflib_act problem was incomplete and also missing
  in TODO
- tcc/ext.c:ext_build used shadowed variable "name", yielding confusing reports
- lex hack to express if anchors conflicted with "drop if", causing enigmatic
  syntax errors (tests/tcng-4j)
- fields.tc: added field udp_data, for symmetry with TCP

Version 4i (24-JUL-2001)
------------------------

- added runtests.sh, trinity.sh, topdir.sh, and configure to usage format
  checking (tests/usage)
- tcc, tcsim, runtests.sh: added new -X phase "x" or "x<elem>" to send
  command-line arguments to programs at tcc's external interface (tests/phasex)
- ext.c now prints standard output of external program when -d is set
- divided TODO into short-term and long-term issues
- ext_all now follows CBQ classes for further classification (tests/extcbq)
- removed corresponding misfeature test from tests/extflt
- ext_all now selects root class if classification fails completely in CBQ,
  instead of yielding an error (tests/extcbq)
- ext_all now refuses priomap parameter (tests/extcbq)
- qdisc.c:assign_class_id did not detect duplicate class IDs (tests/tcng-4i)
- variable scoping was outside-in (tests/tcng-4i)
- "drop" without selector now warns that it's useless (tests/tcng-4i)

Version 4h (23-JUL-2001)
------------------------

- updated kernel version example on tcng/README from 2.4.6 to 2.4.7
- external interface: there is now only a single action per action line, which
  simplifies the code and makes the data structures less ambiguous
- eliminated TCCEXT_ACTIONS and added "index" and "next" fields in
  TCCEXT_ACTION
- updated doc/external.tex accordingly
- updated tests/pragma, tests/tcm, and tests/tcng-3s accordingly
- oops, iflib_bit never emitted "action N" clauses (tests/tcng-4h)
- iflib_act.c:bubble_and turns  Action && Match  into  M && A  without
  considering possible side-effects of A or M (note: the resulting mess fails
  at later processing stages, so at least no incorrect output is generated)

Version 4g (22-JUL-2001)
------------------------

- split qdisc.c into qdisc.c, qdisc_common.h, q_ingress.c, q_cbq.c, q_dsmark.c,
  q_fifo.c, q_gred.c, q_prio.c, q_red.c, q_sfq.c, and q_tbf.c
- split filter.c into filter.c, filter_common.h, f_if.c, f_fw.c, f_route.c,
  f_rsvp.c, and f_tcindex.c
- qdiscs now dump to external interface via QDISC_DSC.dump_ext (using new
  file ext_dump.c)

Version 4f (20-JUL-2001)
------------------------

- ext_all now allows simple configurations with other qdiscs than dsmark at
  root (tests/extndm)
- ext_all tried to include priomap parameter in output (tests/tcng-4f)
- tcc now refuses duplicate parameters in same parameter list
- updated tcc/LANGUAGE accordingly
- simplified intriguingly complicated (and rather fragile) contraption to
  add "bands 3" for PRIO at ext_all
- dsmark can now also generate default classification if default_index is
  absent, but set_tc_index is present (tests/defdsm)
- CBQ can now also generate default classification (tests/defcbq)
- ext_io.c is now better at deleting temporary files (reported by Jacob)
- make clean-test now also removes "precious" files generated by tcc-ext-test
- tcc-ext-test.in and tcc/ext/match.c: changed name of file with tccext data
  from _m*.out to __m*.out to simplify cleanup

Version 4e (19-JUL-2001)
------------------------

- tcc now registers the source code location of all major language elements
- tcc: added new option  -l location_map_file  to generate source code location
  map for language elements (tests/location)
- updated tcc/README accordingly
- a user-defined tag can be assigned to devices, qdiscs, classes, filters,
  filter elements, policers, and tunnels, by including a string in the
  parameter list (tests/tag)
- added test that usage lines of tcc, tcc-module, tcsim, filter.pl, and plot.pl
  are short enough (tests/usage)

Version 4d (17-JUL-2001)
------------------------

- ext_all leaked default parameters among sibling classes (reported by Jacob)
- symbolic links are now generated by scripts/symlinks.sh for better CVS
  compatibility (suggested by Langie Light)
- link to echoh.h was missing in distribution
- when using -B, action "unspec" was called "continue"
- added draft description of new external protocol rules (doc/README.tccext)
- renamed tcc/ext.c to tcc/ext_io.c
- added prototype implementation of new external protocol
- tcc/ext: updated tcc-ext-err, echo.c, echoh_main.c, and tcc-ext-test.in
  accordingly
- made output selection in tests/ext less dependent on naming conventions of
  tcc-ext-test
- updates tests/tcng-3s to obey new calling conventions
- external program now needs to be available even if tcc faild before the build
  phase; updated tests/extflt accordingly
- dependency on "tcc" was missing for "make test"

Version 4c (16-JUL-2001)
------------------------

- added trailing line of dashes to each test title
- added "drop if" construct, which is roughly synonymous to
  "class if (...) && drop" (tests/drop, tests/misfeatures)
- updated tcc/LANGUAGE accordingly
- accessing "raw" without specifying an index crashed iflib_off.c:use_offset
- added cases where bit strings are combined across presence boundaries to
  tests/misfeatures
- included TODO file

Version 4b (14-JUL-2001)
------------------------

- tcsim: an end time can now be specified for "every" (suggested by Stefano
  Avallone; test in tests/until)
- added description of test writing concepts in tests/README
- verified that filter ID range is indeed 1..0xffff, as filter.c assumes
- ext_all.c:filter_path now checks that tcindex classifiers don't use policing
  (tests/extflt)
- ext_all.c:filter_path accessed prm_mask in element, where it doesn't exist
  (but by sheer luck happens to have the right value)
- tcng/README did not mention that also echoh is under the LGPL
- echoh_blocks now accepts a file argument, and tcc-ext-echoh prints on stderr,
  not stdout
- updated kernel version example on tcng/README from 2.4.3 to 2.4.6
- runtests.sh now strips trailing line of dashes from test title, allowing
  writing of more easily readable test files

Version 4a (13-JUL-2001)
------------------------

- tcc/param.c:param_print would de-reference NULL pointer on childless elements
  (reported by Jacob)
- Common.make didn't remove __*.in files generated at external interface
- ext.c did not clean up temporary files after error exit
- libtccext.a: added new function echoh_block to print qdisc/class hierarchy
  (suggested by Jacob)
- added link from include/echoh.h
- added corresponding external program tcc-ext-echoh
- tcc/ext_all.c:filter_path did shift before mask instead of mask before shift
- tcc/ext_all.c:filter_path messed up default parameters
- plot.pl now weights samples when calculating the average rate over multiple
  packets (based on a patch by Lars Wischhof)

Version 3z (12-JUL-2001)
------------------------

- added patch to iproute2/tc to fix offset increment for data items larger than
  4 bytes (patches/tc-u32-incr)
- new qdisc flags QDISC_CHILD_QDISCS and QDISC_SHARED_QDISC to indicate
  how many child qdiscs a qdisc can have
- new undocumented option -F to add FIFO qdiscs wherever a default qdisc is
  used (tests/defifo)
- tccext.h: clarified that TCCEXT_BLOCK.qdiscs points to the top-level qdisc
- started adding infrastructure for clean external interface protocol
- replaced huge "if_ext calls ext_all" hack by several smaller ones

Version 3y (10-JUL-2001)
------------------------

- external.tex did not mention that qdisc and class pragmas begin with the
  keyword "pragma"
- documented how qdisc and class structure is represented at external
  interface
- added support for class hierarchy and pointers to child qdiscs to
  tcc/ext/{tccext.[ch],echo.c} (tests/extqch)
- ext_all.c generated qdiscs parent-first, not child-first
- tccext: introduced new type TCCEXT_CLASS_LIST for list of classes (so that
  classes can be linked according to their own hierarchy)
- added comment to tcc/ext/echo.c to clarify its role

Version 3x (9-JUL-2001)
-----------------------

- tccext.c:tccext_destroy may have looped on qdisc destruction
- tccext and ext_all now support pragmas on qdiscs and classes (tests/pragma)

Version 3w (9-JUL-2001)
-----------------------

- new default parameter handling model involving a stack (currently only used
  by ext_all.c)
- param_get now sets prm_priority.v to 1e6 times the floating-point value
- config.h, error.c: renamed MAX_STACK_DEPTH to MAX_DEBUG_DEPTH
- added dependency on mkprminc to all .inc files generated by it
- mkprminc now names fields in structure initializer
- tcc/ext/{tccext.[ch],echo.c} now know about parameters, and a little bit
  about the structural relationship between qdiscs and classes
- added description of qdiscs, classes, and parameters to doc/external.tex

Version 3v (6-JUL-2001)
-----------------------

- pragma on devices did not set param_def, which could crash tcc (test added
  to tests/pragma)

Version 3u (6-JUL-2001)
-----------------------

- in tccext, changed "queue" to "qdisc", "QUEUE" to "QDISC"
- added experimental module for dumping full configuration (activated with -A)
- tccext recognizes (and ignores) "class"

Version 3t (4-JUL-2001)
-----------------------

- configure is now compatible with 2.4.7 (pre-release)
- configure now takes defaults from old config file if one exists
- ip.def: UDP_HDR did not evaluate parameters (reported by Stefano Avallone)
- tcsim/modules/kmod_cc and scripts/runtests.sh used [ with == instead of =,
  causing problems with older versions of bash (reported by Nikhil Thaker)

Version 3s (4-JUL-2001)
-----------------------

- at external interface, "class" action can now be a comma-separated list of
  queue/class numbers
- tcc-ext-echo now prints action number in decimal instead of hex
- tcc-ext-echo now prints items in the order described in doc/external.tex
- prio default classification was off by a factor of two
- adjusted tests accordingly (pragma, unspec)
- tccext.c could not parse consecutive drops actions

Version 3r (2-JUL-2001)
-----------------------

- remove_duplicates did not handle branches with multiple ingress paths right

Version 3q (2-JUL-2001)
-----------------------

- iflib_bit.c:make_bit now clears counters to avoid buggy-looking debugging
  output
- added daVinci URL to scripts/fsm2dav.pl
- scripts/fsm2dav.pl now also supports "conform" and "count"
- added missing prototype of if_ext.c:get_offset_group
- added masks and shifts to iflib_bit.c
- added mask and shift tests tests/bitops, derived from tests/ifopt

Version 3p (1-JUL-2001)
-----------------------

- oops, iflib_bit.c:dump_this_action had qdisc and class number swapped
- made iflib_bit.c bug list more complete
- moved toys/tcm-tests to tests/tcm to show off the new algorithm
- added test to show double inequality (tests/tcng-3p)

Version 3o (29-JUN-2001)
------------------------

- integrated early development prototype of "if" expression optimization
  based on a finite state machine (not useful yet; invoke with -B)
- added script fsm2dav.pl to convert "raw" FSM output to daVinci term
  representation

Version 3n (27-JUN-2001)
------------------------

- syntax "if conform ($p)" is now accepted
- policer variables can now be redefined (a syntax conflict was introduced in
  version 3k)
- greatly simplified the way how the "police" prefix is made optional
- data_equal: added assertion that arguments aren't operators
- added debugging output to tcc/var.c

Version 3m (26-JUN-2001)
------------------------

- tcng language documentation update (use of bare words is discouraged,
  "police" keyword before variables is optional in if expressions, described
  "if" and related constructs)
- added tests for negation combined with field conditions (tests/field)
- dsmark complained about class for inner qdisc if using default parameters
- after negation, the && and || actions were not swapped, causing incorrect
  processing of multiple nested negations
- tcc/ext/match.c incorrectly refused to count packets for which not enough
  tokens were available
- policing may be too permissive if using "count" without prior "conform"
  (misfeature)
- tcsim used bit size to check room in byte-sized buffer
- tcsim did not check room for default size (one byte)
- tcsim now checks values of packet data for correct range
- require_class always searched for class 0, yielding incorrect default
  selections if such a class existed
- added missing tests for arithmetic replacement of non-equality (tests/arith)

Version 3l (19-JUN-2001)
------------------------

- qdiscs now have flags expressing their capabilities
- more rigid checking for qdisc capabilities
- ingress, dsmark, and prio now generate default class selection (currently
  enabled with undocumented tcc option -C)
- added new action "unspec" which is taken in the absence of -C
- updated tests accordingly (ext, field, misfeature, not, tcng-2u)
- tcc now knows that  # 1 "."  from cpp really means ""

Version 3k (18-JUN-2001)
------------------------

- tcc no longer warns when using "milli" for seconds
- "police" prefix before variable name is now optional
- likewise, "filter" prefix before variable name on "on" expression is now
  optional
- tcc incorrectly refused "eth0 $q = prio ..."
- tcc still refuses above assignment with default device (misfeature)
- tcc incorrectly refused use of qdisc variables at top level
- "mtu" is no longer required for policers if target is not "tc"
- updated tests according to above change (pol_ext, pol_traffic, pragma,
  tcng-3b, vartype)

Version 3j (14-JUN-2001)
------------------------

- tccext_destroy did not free buckets and actions
- added "pragma" parameter to all traffic control elements
- added global pragma directive (tcc)
- added tcc/ext/echo.c to print parsed configuration on standard error
- added regression test tests/pragma to test pragmas
- updated doc/external.tex accordingly

Version 3i (14-JUN-2001)
------------------------

- added patch patches/tc-dsmark-dfl for iproute2/tc to accept default_index 0
  (reported by Stefano Avi)
- tcc now refuses "if" rooted at classes, or combined with other filters
- added preliminary support for negation in "if" expressions

Version 3h (12-JUN-2001)
------------------------

- tcm.tc overestimated tcc's clearvoyance skills by including "count" in
  negated expressions, from where it may not be removed in time
- action numbering did not work when "drop" was involved (it did not recognize
  that "drop" equals "drop", and generated a new inverted tree every time)
- scripts/runtests.sh now prints a grammatically correct message when there is
  only a single test

Version 3g (12-JUN-2001)
------------------------

- if_ext_act.c now tries to use class numbers as action numbers in order to
  ease visual inspection (suggested by Jacob)
- updated tests accordingly (tests/field, tests/tcng-2u, tests/tcng-3b)
- fields.tc is now protected against multiple inclusion
- iflib_red.c:prune_shortcuts incorrectly reduced 0 || X to 1
- op.c:unum1_eval incorrectly assumed operands were always constant
- added TCM design study in toys/tcm.tc

Version 3f (11-JUN-2001)
------------------------

- added various simple arithmetic optimizations (iflib_arith.c)
- added corresponding tests in tests/arith
- tcsim crashed when device name was missing after "dev"
- u32 target now also supports boolean constants 0 and 1
- disabled globbing in runtests.sh to allow the use of asterisks in titles
- iflib_reduce is no longer called by common if code in filter.c:if_dump_tc
- iflib_red.c:do_optimize_eq shifted the default mask in the wrong direction
- if_u32 still has problems with masks; recorded them in tests/misfeatures

Version 3e (7-JUN-2001)
-----------------------

- tcc: fields can now be redefined (added test tests/field)
- policing results can now be used explicitly in "if" expressions (see
  tests/lib/pol_single_drop.tcsim)
- added action "drop" to tccext

Version 3d (7-JUN-2001)
-----------------------

- configure is now compatible with 2.4.6 (pre-release)
- global "make" now also builds content of documentation directory
- new file tests/pol_traffic with "live" policing tests for "C" and "ext"
- policing in tcc/ext/match.c didn't work at all
- added "block" statement to external interface
- if_ext now sorts bits within the same match and offset group by offset
- updated regression tests according to above two changes
- forgot to include scripts/rlatex, oops

Version 3c (5-JUN-2001)
-----------------------

- ether_proto_print(ether_proto(N)) can now return different name than N, or
  number (to handle protocols unknown to tc, or known under a different name)
- policer list wasn't NULL-terminated
- major redesign of action handling in if_ext, resulting in more compact
  actions group
- added flag "combine" to iflib_offset to make optimizations suitably tame for
  if_ext (reported by Jacob)
- above change makes if_ext generate less elegant offset expressions. Adjusted
  tests accordingly and moved old test to toys/reminiscence
- actions may now also include "action N" to point to that action. Updates
  documentation accordingly.

Version 3b (1-JUN-2001)
-----------------------

- moved runtests.sh to scripts/ where it rightfully belongs
- iflib_act issued redundant expressions, creating the impression that they
  were not self-contained
- moved action_tree from if_ext.c to iflib_act.c
- action_tree now knows that C || X is an action tree (C = self-contained)
- iflib_act incorrectly walked into action trees when walking an || chain,
  making incorrect transformations
- README still pointed to old download location (reported by Jacob)
- moved protocol/host/port lookups from tcng.y to new file named.c
- all filters: new parameter "protocol" to set ether protocol (suggested by
  Steven Van den Berghe)
- added a bunch of tests for named items (tests/named)

Version 3a (1-JUN-2001)
-----------------------

- if_ext now moves policing below matches (using iflib_act.c)
- if_ext now detects redundant or conflicting tests and reduces matches/rules
  accordingly
- if_ext now maintains an actions registry, eliminating the shared counter
  hack
- added regression tests for above to tests/pol_ext and tests/ext
- added tests for things to fix: tests/misfeatures

Version 2z (31-MAY-2001)
------------------------

- added policing support to tcc/ext/match.c
- added support for overflow bucket to tccext.[ch]
- doc/external.tex: documented overflow bucket and excluded 0 as bucket index
- doc/external.tex: count does not count below zero
- if_ext now generates policing information
- added regression tests for build process with policing (tests/pol_ext)

Version 2y (30-MAY-2001)
------------------------

- added pointer to PAX PDL to fields.tc (pointer from Michael Richardson)
- if_ext.c now generates action indices and actions (largely untested)
- tccext.c now parses actions and buckets groups
- adjusted tests/tcng-2u and tccext.[ch] accordingly
- added warning that tccext_destroy does not free memory objects attached to
  user fields
- added policing operators "conform" and "count"
- added policer parameter "overflow"
- data.c:print_data now also prints a policer's number
- added policer construction examples toys/srtcm.tc and toys/trtcm.tc
- "rate" parameter was optional in CBQ
- if_ext.c now only invokes debugf if debug > 1

Version 2x (29-MAY-2001)
------------------------

- tcc/tc.h tcc/tcdefs.h: put macro name after #endif in comments
- tcsim's include/linux/time.h only provides struct timeval #ifdef __KERNEL__;
  added #include <sys/time.h> to provide it where needed (2.4.5 compatibility)
- tcsim used flag 1 in pseudo-CPP # lines, confusing cpp 2.96-81

Version 2w (29-MAY-2001)
------------------------

- tcc/ext/tccext: added context as explicit argument to TE_SIZEOF macro (by
  Jacob Teplitsky)
- cleaned up tcc/PARAMETERS; moved RSVP and CBQ differences to tcc/README
- moved description of external format from tcc/if_ext.c to doc/external.tex
- added scripts/t2x.pl for conversion from LaTeX to ASCII
- added scripts/rlatex for automatic repeated invocation of LaTeX
- implemented some of the changes to the external interface
- renamed tcc-ext-cat to tcc-ext-err and changed output from stdout to stderr
- updated regression tests to follow external interface changes
- added new targets sf-upload and upload-sf to upload tcng to SourceForge

Version 2v (25-MAY-2001)
------------------------

- added test for additive headers (tests/additive)
- u32 can't handle additive headers; removed code pretending it can

Version 2u (25-MAY-2001)
------------------------

- iflib_off:extract_sum now also crosses op_offset
- moved removal of __*.out from clean-test to clean-mod
- new external script tcc-ext-cat for test framework (-x if:cat)
- fixed various bugs related to nested offsets (major overhaul of iflib_off.c)
- if_u32:dump_offset shifted in the wrong direction on mis-aligned field, and
  didn't adjust mask
- added corresponding regression tests (tests/tcng-2u)
- tests/ now has sub-directory tests/lib/ with files shared among tests
- trinity.sh must now be invoked with  [-v] [file]
- trinity.sh has dependency on trinity.sh.in
- output filter in trinity.sh did not work for tc target
- removed sed filter from use of trinity.sh in tests/ext; changed use of -v
- runtests.sh now knows about trinity.sh, and how to remove efence output
- new debugging function debugf for better reporting from recursive functions
- tcc now flushes stdout and stderr before invoking external script
- Makefile: added target build-test as alias for test-build

Version 2t (24-MAY-2001)
------------------------

- changed the horrible tcc-ext-ext_test* to tcc-ext-test*
- consolidated TOPDIR replacement in tcsim/modules/Makefile and
  tcc/ext/Makefile in new script scripts/topdir.sh
- added script scripts/trinity.sh.in to compare classifier output for tc, c,
  and external target
- added more tests to tests/ext
- removed redundant call to abort from dump_failed(d); abort();
- if_ext.c now generates  offset  lines
- Makefile: added target test-build to test building the current distribution

Version 2s (23-MAY-2001)
------------------------

- added parser for external target interface (under the LGPL)
- renamed COPYING to COPYING.GPL and upgraded to its Y2k-compatible version
- kmod_cc now removes -shared and adds -c if -r is present in command line
- cls_unspec.c didn't #include <net/rtnetlink.h>, causing compilation of "real"
  kernel module to fail
- tcc/tcm_f called itself "unspec" in usage line
- added framework for including code for external targets
- added corresponding regression test tests/ext

Version 2r (15-MAY-2001)
------------------------

- tcc: target "tc" was mistakenly called "u32"
- enabled more compiler warnings
- fixed new warnings
- made authorship/copyright headers more uniform and extensible
- made "if" expression handling functions more modular
- began adding very experimental generic interface for external targets
- tcc: new command line option -x to register external targets

Version 2q (14-MAY-2001)
------------------------

- bison didn't like tcc/tcng.y (reported by Kristof Verniers)
- iproute2/tc depended on /proc/net/psched, containing values which may differ
  from tcsim's HZ default
- preconditions were always inserted at root, even from below ||
- tcc: usage claimed that "c" was the default target
- Common.make: upload host name wasn't fully qualified

Version 2p (4-MAY-2001)
-----------------------

- make depend in tcng/tcc no longer tries to read tcm_{cls,f}.c (reported by
  Jacob)
- added directories tcng/{bin,include,lib} with links to files used by
  scripts, and for module builds
- tcc and tcsim now automatically add -I for tcng's various header files
- tcc-module no longer requires PATH to be set
- simplified runtests.sh and tests/c according to above changes
- tcc-module is now generated from tcc-module.in
- tcc and tcsim did not set last argv element to NULL before invoking cpp

Version 2o (4-MAY-2001)
-----------------------

- added more tcng regression tests
- tcc/op.c:additive_eval sometimes over-optimized
- tcsim: removed -C option, use -Xc instead
- runtests.sh now also supports -X argument; added phase "s" for tcsim
- tcc-module assumed internal problems on simple usage error
- make targets clean-test{,s} and clean-mod to remove temporary files
- if.c:do_optimize_eq now reports an error if the access would have to be moved
  (which should never happen)
- if_u32 now catches conflicting matches detected by f_u32.c (reported by
  Jacob)
- tcm_cls.c now prints debugging output if compiled with -DDEBUG
- tcc/data.c:data_dump: dt_fnum format is now %#g to make it look different
  from dt_unum

Version 2n (4-MAY-2001)
-----------------------

- added more tcng regression tests
- added 2.4.5 (pre-release) compatibility (memory management changes in
  linux/skbuff.h; removal of ETH_P_ECHO)
- "if 0" and "if 1" now work too
- tcc: recursed endlessly on un-optimized || (reported by Jacob)
- added ../Common.make dependency to {tcc,tcsim,tcsim/modules}/Makefile, so
  "make" after configuration changes has the desired effect
- tcsim: added function warnf
- replaced tcsim's -C by unified -Xphase,arg (like gcc -Xl,...), supported by
  tcsim, tcc, and tcc-module, with phases c=tcc, m=tcc-module, k=kmod_cc,
  t=tcmod_cc
- updated tests/c accordingly
- tcc-module no longer constructs temporary .c files

Version 2m (2-MAY-2001)
-----------------------

- distribution didn't contain tcc/target.h, tcc/target.c

Version 2l (2-MAY-2001)
-----------------------

- added framework for generating C code (experimental)
- tcc: new option -t to enable/disable code generation targets
- tcsim: new option -C to pass arguments to tcc (e.g. -C -tc)
- added C target for "if"
- added more tcng regression tests
- tcc: make clean now removes param_*.inc
- more "if" optimizations to eliminate redundant boolean expressions (fixes
  problems reported by Jacob Teplitsky)

Version 2k (1-MAY-2001)
-----------------------

- added more tcng regression tests
- dump_failed now indicates file name and line number of caller
- if: couldn't dump (field & mask) == value
- if now reduces <<, >>, & underneath ==
- added warnings if masks don't make sense
- added warning if size qualifier is not 8, 16, or 32

Version 2j (1-MAY-2001)
-----------------------

- added one more tcng regression test
- if: added crude hack to work around u32 limitation that offset may not be
  used without previous match (reported by Jacob Teplitsky)

Version 2i (30-APR-2001)
------------------------

- added more tcng regression tests
- if: always try to pull offsets to make leafs more regular (fixes problems
  reported by Jacob Teplitsky)

Version 2h (30-APR-2001)
------------------------

- added one more tcng regression test
- removed defeatistic comment from examples-ng/u32
- make dist: -lefence check still looked in Makefile, not Common.make
- added more definitions to fields.tc
- "if" is always linked to qdisc, not class
- added warning for "if" anchor

Version 2g (29-APR-2001)
------------------------

- new construct: "if" (yes, it works now !)
- added more tcng regression tests
- cleaned up libnetlink.c fix
- no more warnings due to data_destroy{,_1} doing nothing
- patch k-u32-offset was wrong; fixed it

Version 2f (28-APR-2001)
------------------------

- added more tcng regression tests
- tcc error message for invalid tunnel id claimed range starts at 0, not 1
- RSVP: "ah", "esp", and "ipproto" on element supersedes all their defaults
- added directory tcng/patches with fixes needed to pass regression tests
- added more preliminary code for "if"

Version 2e (27-APR-2001)
------------------------

- added more tcng regression tests
- expected losses were mis-calculated in examples/tbf and examples-ng/tbf
- changed field "tos" to "ip_tos" in toys/if
- moved field definitions from toys/if to new file tcc/fields.tc
- parameter truncation warnings were sometimes printed twice
- value of dt_rate parameters is now reported in bps, not Bps in truncation
  warning
- CHANGES: forgot to mention tcc -d option added in 2d
- added tracing of u32 classification process
- setup.ulib fixed receive buffer overrun bug in iproute2/tc (now-ss001007)
- added examples/u32 and (non-functional) examples-ng/u32
- added more preliminary code for "if"

Version 2d (26-APR-2001)
------------------------

- several slight changes to replacement kernel headers to improve compatibility
- moved common Makefile items to Common.make for consistent behaviour in all
  directories
- added tcc option -d to enable debugging output

Version 2c (26-APR-2001)
------------------------

- added more tcng regression tests
- iproute2/tc expects CBQ "weight" to be a size, although it's a rate
  everywhere else. tcng now reluctantly complies ...
- CBQ didn't include "bandwidth" among default parameters, but used it as such
- some preliminary code for parts of "if"
- moved tcng/tcsim/toys to tcng
- added toys/if, my "if" test input
- plot.pl now only plots data sets actually containing data
- parameter name "isolated" wasn't recognized (reported by Jacob Teplitsky)

Version 2b (24-APR-2001)
------------------------

- make clean didn't remove left-over temporary test files
- oops, runtests.sh wasn't included in the distribution

Version 2a (24-APR-2001)
------------------------

- added tcsim to tcng package
- former tcng is now in tcng/tcc/, moved tests and examples-* directories of
  tcsim to tcng/
- removed tcng/tcc/ef-prio-example
- merged COPYING, and parts of README and Makefile
- moved tests and configuration to the top-level
- configure: always sets TCC to $TOPDIR/tcc/tcc, unless explicitly overridden
- tcc: RSVP filter now prints a warning if it has no elements