2 # NOTE: Quite a few patches and suggestions come from other sources, to whom
3 # I'm greatly indebted, even if no names are mentioned.
5 # Thanks to the Coombs Computing Unit at the ANU for their continued support
6 # in providing a very available location for the IP Filter home page and
9 # Thanks to Hewlett Packard for making it possible to port IP Filter to
12 # Thanks to Tel.Net Media for supplying me with equipment to ensure that
13 # IP Filter continues to work on Solaris/sparc64.
15 # Thanks to BSDI for providing object files for BSD/OS 3.1 and the means
16 # to further support development of IP Filter under BSDI.
18 # Thanks to Craig Bishop of connect.com.au and Sun Microsystems for the
19 # loan of a machine to work on a Solaris 2.x port of this software.
21 # Thanks also to all those who have contributed patches and other code,
22 # and especially those who have found the time to port IP Filter to new
25 3.4.31 7/12/2002 - Released
27 Solaris 10 compatibility
29 fix linking into pfil in NetBSD
31 fix IRIX 6.2 compatibility
33 add code to check consistency of fr_checkp/fr_check on non-Solaris
35 OpenBSD: missing patches for ip6_output.c on OpenBSD 3.2,
36 make LKM work for 3.2 (OpenBSD LKMs now match NetBSD)
38 3.4.30 26/11/2002 - Released
40 attempt to detect using GNU make and abort if so
42 OpenBSD 3.2 patches from Stefan Hermes von GMX
44 add MSS clamping code from NetBSD
46 correctly display ipv6 output with ipfstat for (accounting) rules
48 fix problems with ioctl handling for /dev/ipauth
50 set SYN bit in rcmd fake packet to create back channel
52 make libpcap reader capable of determining in/out (not in libpcap file)
53 and add more DLT types
55 do not allow redirects to localhost for Solaris in NAT parser
57 allow return-rst with auth rules
61 fix for handling ipv6 icmp errors
63 fix up ipfs command line option processing
65 only allow processing a ftp 227 response following a PASV command
67 NetBSD: use poll() and adapt to new cdevsw mechanism
69 make flushing for just ipv6 things work
71 3.4.29 28/8/2002 - Released
73 Make substantial changes to the FTP proxy to improve reliability, security
76 don't send ICMP errors/TCP RST's in response to blocked proxy packets
78 fix potential memory leaks when unloading ipfilter from kernel
80 fix bug in SIOCGNATL handler that did not preserve the expected
81 byte order from earlier versions in the port number
83 set do not fragment flag in generated packets according to system flags,
86 preserve filter rule number and group number in state structure
88 fix bug in ipmon printing of p/P/b/B
90 make some changes to the kmem.c code for IRIX compatibility
92 add code to specifically handle ip.tun* interfaces on Solaris
94 3.4.28 6/6/2002 - Released
96 Fix for H.323 proxy to work on little endian boxes
98 IRIX: Update installation documentation
101 allow use of groups > 65535
103 create a new packet info summary for packets going through ipfr_fastroute()
104 so that where details are different (RST/ICMP errors), the packet now gets
105 correctly NAT'd, etc.
107 fix the FTP proxy so that checks for TCP sequence numbers outside the
108 normal offset due to data changes use absolute numbers
110 make it possible to remove rules in ipftest
112 Update installing onto OpenBSD and split into two directories:
113 OpenBSD-2 and OpenBSD-3
115 fix error in printout out the protocol in NAT rules
117 always unlock ipfilter if locking fails half way through in ipfs
119 fix problems with TCP window scaling
121 update of man pages for ipnat(4) and ipftest(1)
123 3.4.27 28/04/2002 - Released
125 fix calculation of 2's complmenent 16 bit checksum for user space
127 add mbuflen() to usespace compiles.
129 add more #ifdef complexity for platform portability
131 add OpenBSD 3.1 diffs
133 3.4.26 25/04/2002 - Released
135 fix parsing and printing of NAT rules with regression tests.
137 add code to adjust TCP checksums inside ICMP errors where present and as
140 fix documentation problems in instal documents
142 fix locking problem with auth code on Solaris
144 fix use of version macros for FreeBSD and make the use of __FreeBSD_version
145 override previous hacks except when not present
147 fix the macros defined for SIOCAUTHR and SIOCAUTHW
149 fix the H.323 proxy so it no longer panics (multiple issues: re-entry into
150 nat_ioctl with lock held on Solaris, trying to copy data from kernel space
151 with copyin, unaligned access to get 32bit & 16bit numbers)
153 use the ip_ttl ndd parameter on Solaris to fill in ip_ttl for packets
154 generated by IPFilter
156 fix comparing state information to delete state table entries
158 flag packets as being "bad state" if they're outside the window and prevent
159 them from being able to cause new state to be created - except for SYN packets
161 be stricter about what packets match a TCP state table entry if its creation
162 was triggered by a SYN packet.
164 add patches to handle TCP window scaling
166 don't update TCP state table entries if the packet is not considered to be
167 part of the connection
169 ipfs wasn't allowing -i command line option in getopt
171 IRIX: fix kvm interface, fix compile warnings, compile the kernel with -O2
172 regardless of user compile, fix the getkflags script to prune down the
173 output more so it is acceptable
175 change building in Makefiles to create links to the application in $(TOP)
176 at the end of "build" rather than when each is created.
178 update BSD/kupgrade for FreeBSD
180 l4check wasn't properly closing things when a connection fails
182 man page updates for ipmon(8) and ipnat(5)
184 more regression tests added.
186 3.4.25 13/03/2002 - Released
188 retain rule # in state information
190 log the direction of a packet so ipmon gets it right rather than incorrectly
191 deriving it from the rule flags
193 add #ifdef for IPFILTER_LOGSIZE (put options IPFILTER_LOGSIZE=16384 in BSD
194 kernel config files to increase that buffer size)
196 recognise return-* rules differently to block in ipftest
198 fix bug in ipmon output for solaris
200 add regression testing for skip rules, logging and using head/group
202 fix output of ipmon: was displaying large unsigned ints rather than -1
203 when no rules matched.
205 make logging code compile into ipftest and add -l command line option to
206 dump binary log file (read with ipmon -f) when it finishes.
208 protect rule # and group # from interference when checking accounting rules
210 add regression testing for log output (text) from ipmon.
212 document -b command line option for ipmon
214 fix double-quick in Solaris startup script
216 3.4.24 01/03/2002 - Released
218 fix how files are installed on SunOS5
220 fix some minor problems in SunOS5 ipfboot script
222 by default, compile all OpenBSD tools in 3.0 for IPv6
224 fix NULL-pointer dereference in NAT code
226 make a better attempt at replacing the appropriate binaries on BSD systems
228 always print IPv6 icmp-types as a number
230 impose some rules about what "skip" can be used with
232 fix parsing problems with "keep state" and "keep state-age"
234 Try to read as much data as is in the log device in ipmon
236 remove some redundant checks when searching for rdr/nat rules
238 fix bug in handling of ACCT with FTP proxy
240 increase array size for interface names, using LIFNAMSIZ
242 include H.323 proxy from QNX
244 3.4.23 16/01/2002 - Released
246 Include patches to install IPFilter into OpenBSD 3.0, both for just kernel
247 compiles and complete system builds.
249 Fix bug in automatic flushing of state table which would cause it to hang
250 in an infinite loop bug introduced in 3.4.20.
252 Modify the sample proxy (samples/proxy.c) so that it ads a NAT mapping for
253 the outgoing connection to make it look like it comes from the real source.
255 Only support ICMPv6 with IPv6.
257 Move ipnat.1 to ipnat.8
259 Enhance ipmon to print textual ICMP[v6] types and subtypes where possible.
261 Make it possible to do IPv6 regression testing with ipftest.
263 Use kvm library for kmem access, rather than trying to do it manually with
266 Fix diffs for ip_input.c on BSDOS so it doesn't crash with fastroute.
268 Remove Berkeley advertising licence clause. Reference:
269 ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
271 Add more regression tests: ICMPv6 neighbour discovery, ICMP time exceeded
272 and fragmentation required.
274 Fix ipfboot script on Solaris to deal with no nameservers or no route to
275 them in a clean manner.
277 Support per-rule set timeouts for non-TCP NAT and state
281 Add ICMPv6 stateful checking, including handling multicast destination
282 addresses for neighbour discovery.
284 Fix problems with internals of ICMP messages for MTU discovery and
285 unreachables not being correctly adjust on little endian boxes.
287 Add "in-via" and "out-via" to filtering rules grammar. It is now possible
288 to bind a rule to both incoming and outgoing interfaces, in both forward
289 and reverse directions (4 directions in total). allows for asymetric flows
292 Fix ipfstat and ipnat for working on crash dumps.
294 Don't let USE_INET6 stay defined for SunOS4
296 Count things we see for each interface on solaris.
298 Include <netinet/icmp6.h> when compiling with USE_INET6 defined and
299 also include a whole bunch of #define's to make sure the symbols expected
302 Fix up fastroute on BSD systems.
304 Make fastrouting work for IPv6 just a bit better. doesn't split up big
305 packets into fragments like the IPv4 one does. You can now do a
306 "to <if>:<ipv6_addr>"
308 Remove some of the differences between user-space and kernel-space code
309 that is internal to ipfilter.
311 Call ipfr_slowtimer() after each packet is processed in ipftest to artificially
312 create the illusion of passing time and include the expire functions in the
313 code compiled for user-space.
315 Fix issues with the IPSec proxy not working or leading to a system crash.
317 Junk all processing of SPIs and special handling for ESP.
319 Add "no-match" as a filter rule action (resets _LAST_ match)
321 Add hack to workaround problems with Cassini interface cards on
324 Add some protocols to etc/protocols
326 3.4.22 03/12/2001 - Released
328 various openbsd changes
330 sorting based on IP numbers for ipfstat top output
332 fix various IPv6 code & compile problems
334 modify ip_fil.c to be more netbsd friendly
336 fix fastroute bug where it modified a packet post-sending
338 fix get_unit() - don't understand why it was broken.
340 add FI_IGNOREPKT and don't count so marked packets when doing stats or
343 extend the interface name saved to log output
345 make proxies capable of extending the matching done on a packet with a
346 particular nat session
348 change interfaces inside NAT & state code to accomodate redesign to allow
351 fix bug when free'ing loaded rules that results in a memory leak
352 (only an issue with "ipf -rf -", not flush)
354 make ipftest capable of loading > 1 file or rules, making it now possible
355 to load both NAT & filter rules
357 fix hex input for ipftest to allow interface name & direction to work
359 show ipsec proxy details in ipnat output
361 if OPT_HEX is set in opts, print a packet out as hex
363 don't modify b_next or preseve it or preserve b_prev for solaris
365 fix up kinstall scripts to install all the files everywhere they need to
367 fix overflowing of bits in ip_off inside iptest
369 make userauth and proxy in samples directory compile
371 fix minimum size when doing a pullup for ESP & ICMPv6
373 3.4.21 24/10/2001 - Released
377 make state work for non-tcp/udp/icmp in a very simple way
379 include diffs for ipv6 firewall on openbsd-2.9
381 add compatibility filter wrapper for NetBSD-current
383 fix command line option problems with ipfs
385 if we fill the state table and a automated flush doesn't purge any
386 expiring entries, remove all entries idle for more than half a day
388 fix bug with sending resets/icmp errors where the pointer to the data
389 section of the packet was not being set (BSD only)
391 split out validating ftp commands and responses into different halves,
392 one for each of server & client.
394 do not compile in STATETOP support for specific architectures
396 fix INSTALL.FreeBSD to no longer provide directions and properly direct
397 people to the right file for the right version of FreeBSD.
399 3.4.20 24/07/2001 - Released
401 adjust NAT hashing to give a better spread across the table
403 show icmp code/type names in output, where known
405 fix bug in altering cached interface names in state when resync'ing
407 fix bug in real audio proxy that caused crashs
409 fix compiling using sunos4 cc
411 patch from casper to address weird exit problem for ipstat in top mode
413 patch from Greg Woods to produce names for icmp types/unreach codes,
416 fix bug where ipfr_fastroute() would use a mblk and it would also get
419 don't match fragments which would cause 64k length to be exceeded
421 ftp proxy fix for port numbers being setup for pasv ftp with state/nat
423 change hashing for NAT to include both IP#'s and ports.
425 Solaris fixes for IPv6
427 fix compiling iplang bits, under Solaris, for ipsend
429 3.4.19 29/06/2001 - Released
431 fix to support suspend/resume on solaris8 as well as ipv6
433 include group/group-head in match of filter rules
435 fix endian problem reading snoop files
437 make all licence comments point to the one place
439 fix ftp proxy to only advance state if a reply is received in response to
442 3.4.18 05/06/2001 - Released
444 fix up parsing of "from ! host" where '!' is separate
446 disable hardware checksums for NetBSD
448 put ipftest temporary files in . rather than /tmp
450 modify ftp proxy to be more intelligent about moving between states
451 and recognise new authentication commands
453 allow state/nat table sizes to be externally influenced
455 print out host mapping table for NAT with ipnat -l
457 fix handling of hardware checksum'ing on Solaris
459 fixup makefiles for Solaris
461 update regression tests
463 fix surrender of SPL's for failure cases
465 include patches for OpenBSD's new timeout mechanism
467 default ipl_unreach to ICMP_UNREACH_FILTER_PROHIB if defined, else make it
470 fix up handling of packets matching auth rules and interaction with state
472 add -q command line option to ipfstat on Solaris to list bound interfaces
474 add command line option to ipfstat/ipnat to select different core image
476 don't use ncurses on Solaris for STATETOP
478 fix includes to get FreeBSD version
480 do not byte swap ip_id
482 fix handling success for packets matching the auth rule
484 don't double-count short packets
486 add ICMP router discovery message size recognition
488 fix packet length calculation for IPv6
490 set CPUDIR when for install-sunos5 make target
492 SUNWspro -xF causes Solaris 2.5.1 kernel to crash
494 3.4.17 06/04/2001 - Released
496 fix fragment#0 handling bug where they could get in via cache information
497 created by state table entries
499 use ire_walk to look for ire cache entries with link layer headers cached
501 deal with bad SPL assumptions for log reading on BSD
503 fix ftp proxy to allow logins with passwords
505 some auth rule patches, fixing byte endian problems and returning as an error
507 support LOG_SECURITY, where available, in ipmon
509 don't return an error for packets which match auth rules
511 introduce fr_icmpacktimeout to timeout entries once an ICMP reply has
512 been seen separately to when created
514 3.4.16 15/01/2001 - Released
516 fix race condition in flushing of state entries that are timing out
520 log all NAT entries created, not just those via rules
522 3.4.15 17/12/2000 - Released
524 add minimum ttl filtering (to be replaced later by return-icmp-as-dest
525 for all ICMP packets matching state entries).
527 fix NAT'ing of fragments
529 fix sanity checks for ICMPV6
531 fix up compiling on IRIX 6.2 with IDF/IDL installed
533 3.4.14 02/11/2000 - Released
535 cause flushing NAT table to generate log records the same as state flush
538 fix ftp proxy port/pasv
540 fix problem where nat_{in,out}lookup() would release a write lock when it
543 add check for ipf6.conf in Solaris ipfboot
545 3.4.13 28/10/2000 - Released
547 fix introduced bug with ICMP packets being rejected when valid
549 fix bug with proxy's that don't set fin_dlen correctly when calling
552 3.4.12 26/10/2000 - Released
554 fix installing into FreeBSD-4.1
556 fix FTP proxy bug where it'd hang and make NAT slightly more efficient
558 fix general compiling errors/warnings on various platforms
560 don't access ICMP data fields that aren't there
562 3.4.11 09/10/2000 - Released
564 return NULL for IPv6 access control lists if it is disabled rather than
567 fix for getting protocol & packet length for IPv6 packets for pullup.
569 update plog script from version 0.8 to version 0.10
571 patch from Frank Volf adding fix_datacksum() to NAT code, enhancing the
572 capabilities for "fixing" checksums.
574 3.4.10 03/09/2000 - Released
576 merge patch from Frank Volf for ICMP nat handling of TCP/UDP data `errors'
578 getline() adjusts linenum now
580 add tcphalfclosed timeout
582 fill in icmp_nextmtu field if it is defined on the platform
584 RST generation fix from guido
586 force 32bit compile for gcc on solaris if it can't generate 64bit code
588 encase logging when fr_chksrc == 2 in #ifdef IPFILTER_LOG
590 fix up line wrap problems in plog script
592 fix ICMP packet handling to not drop valid ICMP errors
594 freebsd 5.0 compat changes
596 3.4.9 08/08/2000 - Released
598 implement new aging mechanism in fr_tcp_age()
600 fix icmp state checking bug
602 revamp buildsunos script and build both sparcv7/sparcv9 for Solaris
603 if on an Ultra with a 64bit system & compiler (Caseper Dik)
605 open ipfilter device read only if we know we can
607 print out better information for ICMP packets in ipmon
609 move checking for source spoofed packets to a point where we can generate
612 return EFAULT from ircopyptr/iwcopyptr
614 don't do ioctl(SIOCGETFS) for auth stats
616 fix up freeing mbufs for post-4.3BSD
618 fix returning of inc from ftp proxy
620 fix bugs with ipfs -R/-W (Caseper Dik)
622 3.4.8 19/07/2000 - Released
624 create fake opt_inet6.h for FreeBSD-4 compile as LKM
626 add #ifdef's for KLD_MODULE sanity
628 NAT fastroute'd packets which come out of return-*
630 fix upper/lower case crap in ftp proxy and get seq# checking fixed up.
632 3.4.7 08/07/2000 - Released
634 make "ipf -y" lookup NAT if's which are unknown
636 prepend line numbers to ioctl error messages in ipf/ipnat
638 don't apply patches to FreeBSD twice
640 allow for ip_len to be on an unaligned boundary early on in fr_precheck
642 fix printing of icmp code when it is 0
644 correct printing of port numbers in map rules with from/to
646 don't allow fr_func to be called at securelevel > 0 or rules to be added
647 if securelevel > 0 if they have a non-zero fr_func.
649 3.4.6 11/06/2000 - Released
651 add extra regression tests for new nat functionality
653 place restrictions on using '!' in map/rdr rules
655 fix up solaris compile problems
657 3.4.5 10/06/2000 - Released
659 mention -sl in ipfstat.8
661 fix/support '!' in from/to rules (rdr) for NAT
663 add from/to support to rdr NAT rules
665 don't send ICMP errors in response to ICMP errors
667 fix sunos5 compilation for "ipfstat-top" and cleanup ipfboot
669 input accounting list used for both outbound and inbound packets
671 3.4.4 23/05/2000 - Released
673 don't add TCP state if it is an RST packet and (attempt) to send out
674 RST/ICMP packets in a manner that bypasses IP Filter.
676 add patch to work with 4.0_STABLE delayed checksums
678 3.4.3 20/05/2000 - Released
682 don't truncate IPv6 packets on Solaris
684 fix keep state for ICMP ECHO
686 add some NAT stats and use def_nat_age rather than DEF_NAT_AGE
688 don't make ftp proxy drop packets
690 use MCLISREFERENCED() in tandem with M_EXT to check if IP fields need to be
693 fix up RST generation for non-Solaris
695 get "short" flag right for IPv6
697 3.4.2 - 10/5/2000 - Released
699 Fix bug in dealing with "hlen == 1 and opt > 1" - Itojun
701 ignore previous NAT mappings for 0/0 and 0/32 rules
703 bring in a completely new ftp proxy
705 allow NAT to cause packets to be dropped.
707 add NetBSD callout support for 1.4-current
709 3.4.1 - 30/4/2000 - Released
711 add ratoui() and fix parsing of group numbers to allow 0 - UINT_MAX
713 don't include opt_inet6.h for FreeBSD if KLD_MODULE is defined
715 Solaris must use copyin() for all types of ioctl() args
717 fix up screen/tty when leaving "top mode" of ipfstat
719 linked list for maptable not setup correctly in nat_hostmap()
721 check for maptable rather than nat_table[1] to see if malloc for maptable
722 succeeded in nat_init
724 fix handling of map NAT rules with "from/to" host specs
726 fix printout out of source address when using "from/to" with map rules
728 convert ip_len back to network byte order, not plen, for solaris as ip_len
729 may have been changed by NAT and plen won't reflect this
731 3.4 - 27/4/2000 - Released
733 source address spoofing can be turned on (fr_chksrc) without using
736 group numbers are now 32bits in size, up from 16bits
738 IPv6 filtering available
740 add frank volf's state-top patches
742 add load splitting and round-robin attribute to redirect rules
744 FreeBSD-4.0 support (including KLD)
746 add top-style operation mode for ipfstat (-t)
748 add save/restore of IP Filter state/NAT information (ipfs)
750 further ftp proxy security checks
752 support for adding and removing proxies at runtime
754 3.3.13 26/04/2000 - Released
756 Fix parsing of "range" with "portmap"
758 Relax checking of ftp replies, slightly.
760 Fix NAT timeouts for ICMP packets
762 SunOS4 patches for ICMP redirects from Jurgen Keil (jk@tools.de)
764 3.3.12 16/03/2000 - Released
766 tighten up ftp proxy behaviour. sigh. yuck. hate.
768 fix bug in range check for NAT where the last IP# was not used.
770 fix problem with icmp codes > 127 in filter rules caused bad things to
771 happen and in particular, where #18 caused the rule to be printed
774 fix bug with the spl level not being reset when returning EIO from
775 iplioctl due to ipfilter not being initialized yet.
777 3.3.11 04/03/2000 - Released
779 make "or-block" work with lines that start with "log"
781 fix up parsing and printing of rules with syslog levels in them
783 fix from Cy Schubert for calling of apr_fini only if non-null
786 3.3.10 24/02/2000 - Released
788 * fix back from guido for state tracking interfaces
790 * update for NetBSD pfil interface changes
792 * if attaching fails and we can abort, then cleanup when doing so.
795 * solaris.c (fr_precheck): After calling freemsg on mt, set it point to *mp.
796 * ipf.c (packetlogon): use flag to store the return value from get_flags.
797 * ipmon.c (init_tabs): General cleanup so we do not have to cast
798 an int s->s_port to u_int port and try to check if the u_int port
801 3.3.9 15/02/2000 - Released
803 fix scheduling of bad locking in fr_addstate() used when we attach onto
806 fix up ip_statesync() with storing interface names in ipstate_t
808 fix fr_running for LKM's - Eugene Polovnikov
810 junk using pullupmsg() for solaris - it's next to useless for what we
811 need to do here anyway - and implement what we require.
813 don't call fr_delstate() in fr_checkstate(), when compiled for a user
814 program, early but when we're finished with it (got fr & pass)
816 ipnat(5) fix from Guido
818 on solaris2, copy message and use that with filter if there is another
819 copy if it being used (db_ref > 1). bad for performance, but better
820 than causing a crash.
822 patch for solaris8-fcs compile from Casper Dik
824 3.3.8 01/02/2000 - Released
826 fix state handling of SYN packets.
828 add parsing recognition of extra icmp types/codes and fix handling of
829 icmp time stamps and mask requests - Frank volf
831 3.3.7 25/01/2000 - Released
833 sync on state information as well as NAT information when required
835 record nat protocol in all nat log records
837 don't reuse the IP# from an active NAT session if the IP# in the rule
838 has changed dynamically.
840 lookup the protocol for NAT log information in ipmon and pass that to
843 fix the bug with changing the outbound interface of a packet where it
844 would lead to a panic.
846 use fr_running instead of ipl_inited. (sysctl name change on freebsd)
848 return EIO if someone attempts an ioctl on state/nat if ipfilter is not
851 fix rule insertion bug
853 make state flushing clean anything that's not fully established (4/4)
855 call fr_state_flush() after we've released ipf_state so we don't generate
856 a recursive mutex acquisition panic
858 fix parsing of icmp code after return-icmp/return-icmp-as-dest and add
859 some patches to enhance parsing strength
861 3.3.6 28/12/1999 - Released
863 add in missing rwlock release in fr_checkicmpmatchingstate() and fix check
864 for ICMP_ECHO to only be for packet, not state entry which we don't have yet.
866 handle SIOCIPFFB in nat_ioctl() and fr_state_ioctl()
868 fix size of friostat for SunOS4
870 fix bug in running off the end of a buffer in real audio proxy
872 3.3.5 11/12/1999 - Released
874 fix parsing of "log level" and printing it back out too
876 <net/if_types.h> is only present on Solaris2.6/7/8
878 use send_icmp_err rather than icmp_error to send back a frag-needed error
881 do not use -b with add_drv on Solaris unless $BASEDIR is set.
883 fix problem where source address in icmp replies is reversed
885 fix yet another problem with real audio.
887 3.3.4 4/12/1999 - Released
889 fix up the real audio proxy to properly setup state information and NAT
890 entries, thanks to Laine Stump for testing/advice/fixes.
892 fix ipfr_fastroute to set dst->sin_addr (Sean Farley - appears to prevent
893 FreeBSD 3.3 from panic'ing) as this had been removed in prior hacks to this
896 fix kinstall for BSDI
898 support ICMP errors being allowed through for ICMP packets going out with
901 support hardware checksumming (gigabit ethernet cards) on Solaris thanks to
902 Tel.Net Media for providing hardware for testing.
904 patched from Frank Volf for ipmon (ICMP & fragmented packets) and allowing
905 ICMP responses to ICMP packets in the keep state table.
907 add in patches for hardware checksumming under solaris
909 Solaris install scripts now use $BASEDIR as appropriate.
913 fix "ipf -y" on solaris so that it rescans rules also for changes in
916 let ipmon become a daemon with -D if it is using syslog
918 fix parsing of return-icmp-as-dest(foo)
920 add reference to ipfstat -g to ipfstat.8
922 ipf_mutex needs to be declared for irix in ip_fil.c
924 3.3.3 22/10/1999 - Released
926 add -g command line option to ipfstat to show groups still define.
928 fix problem with fragment table not recording rule pointer when called
929 from state functions (fin_fr not set).
931 fixup fastroute problems with keep state rules.
933 load rules into inactive set first, so we don't disable things like NIS
934 lookups half way through processing - found by Kevin Littlejohn
936 fix handling of unaligned ip pointer for solaris
938 patch for fr_newauth from Rudi Sluijtman
940 fixed htons() bug in fr_tcpsum() where ip_p wasn't cast to u_short
942 3.3.2 23/09/1999 - Released
944 patches from Scott Presnell to fix rcmd proxy
946 patches from Greg to fix Solaris detachment of interfaces
948 add openbsd compatibility fixes
950 fix free'ing already freed memory in ipfr_slowtimer()
952 fix for deferencing invalid memory in cleaning up after a device disappears
954 3.3.1 14/8/1999 - Released
956 remove include file sys/user.h for irix
958 prevent people from running buildsunos directly
960 fix up some problems with the saving of rule pointers so that NAT saves
961 that information in case it should need to call fr_addstate() from a proxy.
963 fix up scanning for the end of FTP messages
965 don't remove /etc/opt/ipf in postremove
967 attempt to prevent people running buildsolaris script without doing a
970 fix timeout losing on freebsd3
972 3.3 7/8/1999 - Released
974 NAT: information (rules, mappings) are stored in hash tables; setup some
975 basic NAT regression testing.
977 display version name of installed kernel code when initializing.
979 add -V command line option to ipf, showing version (program and kernel
980 module) as well as the run-status of the kernel code.
982 fix problem with "log" rules actually affecting result of filtering.
984 automatically use SUNWspro if available and on a 64bit Solaris system for
987 add kernel proxies for rcmd(3) and RealAudio (PNA)
989 use timeout/untimeout on SunOS4/BSD platforms too rather than hijacking
992 fix IP headers generated through parsing of text information
994 fix NAT rules to be in the correct order again.
996 make keep-state work with to/fastroute keywords and enforce usage of those
999 update keep-state code with new algorithm from Guido
1001 add FreeBSD-3 support
1003 add return-icmp-as-dest option to retrun an ICMP packet using the original
1004 destination as the source rather than a local IP address
1006 add "level [facility.]<priority>" option to filter language
1008 add changes from Guido to state code.
1010 add code to return EPERM if the device is opened for writing and we're
1011 in securelevel 2 or greater.
1013 authentication code patches from Guido
1015 fix real audio proxy
1017 fix ipmon rule printing of interfaces and add IN/OUT to the end of ipmon
1020 fix bimap rules with hash tables
1022 update addresses used in NAT mappings for 0/32 rules for any protocol but TCP
1023 if it changes on the interface - check every ip_natexpire()
1025 add redirect regression test
1027 count buckets used in the state hash table.
1029 fix sending of RST's with return-rst to use the ack number provided in
1030 the packet being replied to in addition to the sequence number.
1032 fix to compile as a 64bit application on solaris7-64bit
1034 add NAT IP mapping to ranges of IP addresses that aren't CIDR specified
1036 fix calculation of in_space parameter for NAT
1038 fix `wrapping' when incrementing the next ip address for use in NAT
1040 fix free'ing of kernel memory in ip_natunload on solaris
1042 fix -l/-U command line options from interfering with each other
1044 fix fastroute under solaris2 and cleanup compilation for solaris7
1046 add install scripts and compile cleanly on BSD/OS 4.0
1048 safely open files in /tmp for writing device output when testing.
1050 fix uninitialized pointer bug in NAT
1052 fix SIOCZRLST (zero list rule stats) bug with groups
1054 change some usage of u_short to u_int in function calling
1056 fix compilation for Solaris7 (SUNWspro)
1058 change solaris makefiles to build for either sparc or i386 rather than
1059 per-cpu (sun4u, etc).
1063 add patches from George Michaelson for FreeBSD 3.0
1065 add patch from Guido to provide ICMP checking for known state in the same
1066 manner as is done for NAT.
1068 enable FTP PASV proxying and enable wildcarding in NAT/state code for ports
1069 for better PORT/PASV support with FTP.
1071 bring into main tree static nat features: map-block and "auto" portmapping.
1073 add in source host filtering for redirects (alan jones)
1075 3.2.10 22/11/98 - Released
1077 3.2.10beta9 17/11/98 - Released
1079 fix fr_tcpsum problems in handling mbufs with an odd number of bytes
1080 and/or split across an mbuf boundary
1082 fix NAT list entry comparisons and allow multiple entries for the same
1083 proxy (but on different ports).
1085 don't create duplicate NAT entries for repeated PORT commands.
1087 3.2.10beta8 14/11/98 - Released
1089 always exit an rwlock before expecting to enter it again on solaris
1091 fix loop in nat_new for pre-existing nat
1093 don't setup state for an ftp connection if creating nat fails.
1095 3.2.10beta7 05/11/98 - Released
1097 set fake window in ipft_tx.c to ensure code passes tests.
1099 cleaned up/enhanced ipnat -l/ipnat -lv output
1101 fixed NAT handling of non-TCP/UDP packets, esp. for ICMP errors returned.
1103 Solaris recusive mutex on icmp-error/tcp-reset - requires rwlock's rather
1106 3.2.10beta6 03/11/98 - Released
1108 fix mixed use of krwlock_t and kmutex_t on Solaris2
1110 fix FTP proxy back up, splitting pasv code out of port code.
1112 3.2.10beta5 02/11/98 - Released
1114 fixed port translation in ICMP reply handling
1116 3.2.10beta4 01/11/98 - Released
1118 increase useful statistic collection on solaris
1120 filter DL_UNITDATA_REQ as well as DL_UNITDATA_IND on solaris
1122 disable PASV reply translation for now
1124 fail with an error if we try to load a NAT rule with a non-existant
1127 fix portmap usage with 0/0 and 0/32 map rules
1129 remove ap_unload/ap_expire - automatically done when NAT is cleaned up
1131 print "STATE:CLOSED" from ipmon if the connection progresses past established
1132 rather than "STATE:EXPIRED"
1134 3.2.10beta3 26/10/98 - Released
1136 fixed traceroute/nat problem
1138 rewrote nat/proxy interface
1140 ipnat now lists associated proxy sessions for each NAT where applicable
1142 3.2.10beta2 13/10/98 - Released
1144 use KRWLOCK_T in place of krwlock_t for solaris as well as irix
1146 disable use of read-write lock acquisition by default
1148 add in mb_t for linux, non-kernel
1150 some changes to progress compilation on linux with glibc
1152 change PASV as well as PORT when passed through kernel ftp proxy.
1154 don't allow window to become 0 in tcp state code
1156 make ipmon compile cleaner
1160 3.2.10beta 11/09/98 - Released
1162 stop fr_tcpsum() thinking it has run out of data when it hasn't.
1164 stop solaris panics due to fin_dp being something wild.
1166 revisit usage of ATOMIC_*()
1168 log closing state of TCP connection in "keep state"
1170 fix fake-arp table code for ipsend.
1172 ipmon now writes pid to a file.
1174 fix "ipmon -a" to actually activate all logging devices.
1176 add patches for BSDOS4.
1178 perl scripts for log analysis donated.
1180 3.2.9 22/06/98 - Released
1182 fix byte order for ICMP packets generated on Solaris
1184 fix some locking problems.
1186 fix malloc bug in NAT (introduced in 3.2.8).
1188 patch from guido for state connections that get fragmented
1190 3.2.8 08/06/98 - Released
1192 use readers/writers locks in Solaris2 in place of some mutexes.
1194 Solaris2 installation enhancements - Martin Forssen (maf@carlstedt.se)
1196 3.2.7 24/05/98 - Released
1198 u_long -> u_32_t conversions
1200 patches from Bernd Ernesti for NetBSD
1202 fixup ipmon to actually handle HUP's.
1204 Linux fixes from Michael H. Warfield (mhw@wittsend.com)
1206 update for keep state patch (not security related) - Guido
1208 dumphex() uses stdout rather than log
1210 3.2.6 18/05/98 - Released
1212 fix potential security loop hole in keep state code.
1216 3.2.5 09/05/98 - Released
1218 BSD/OS 3.1 .o files added for the kernel.
1220 fix sequence # skew vs window size check.
1222 fix minimum ICMP header size check.
1224 remove references to Cybersource.
1226 fix my email address.
1228 remove ntohl in ipnat - Thomas Tornblom
1230 3.2.4 09/04/98 - Released
1232 add script to make devices for /dev on BSD boxes
1234 fixup building into the kernel for FreeBSD 2.2.5
1236 add -D command line option to ipmon to make it a daemon and SIGHUP causes
1237 it to close and reopen the logfile
1239 fixup make clean and make package for SunOS5 - Marc Boucher
1241 postinstall keeps adding "minor=ipf ipl" - George Ross <gdmr@dcs.ed.ac.uk>
1243 protected by IP Filter gif - Sergey Solyanik <solik@atom.ru>
1245 3.2.3 10/11/97 - Released
1247 fix some iplang bugs
1249 fix tcp checksum data overrun, sgi #define changes,
1250 avoid infinite loop when nat'ing to single IP# - Marc Boucher
1252 fixup DEVFS usage for FreeBSD
1254 fix sunos5 "make clean" cleaning up too much
1256 3.2.2 28/11/97 - Released
1258 change packet matching to return actual error, if bad packet, to facilitate
1261 allow ip:netmask in grammar too now - Guido
1263 assume IRIX has u_int32_t in sys/types.h (needed for R10000)
1265 rewrite parts of command line options for ipmon
1267 fix TCP urgent packet & offset testing and add LAND attack test for iptest
1269 fix grammar error in yacc grammar for iplang
1271 redirect (rdr) destination port bytes-wapped when it shouldn't be.
1273 general: fr_check now returns error code, such as EHOSTUNREACH or
1274 ECONNRESET (attempt to make ECONNRESET work for locally outbound
1277 linux: enable return-rst, need to filter tcp retransmits which are sent
1278 separately from normal packets
1280 memory leak plugged in ip_proxy.c
1282 BSDI compatibility patches from Guido
1284 tcp checksum fix - Marc Boucher
1286 recursive mutex and ioctl param fix - Marc Boucher
1288 3.2.1 12/11/97 - Released
1292 port to Linux 2.0.31
1294 patches to make "map a/m -> 0/0" work with ftp proxying properly - Marc Boucher
1296 add "ipf -F s" and "ipf -F S" to flush state table entries.
1298 announce if logging is on or off when ip filter initializes.
1300 "ipf -F a" doesn't flush groups properly for Solaris.
1302 3.2 30/10/97 - Released
1304 ipnat doesn't successfully remove proxy mappings with "-rf" -
1307 use K&R C function style for solaris kernel code
1309 use m_adj() to decrease packet size in ftp proxy
1311 use mbufchainlen rather than msgdsize,
1312 IRIX update - Marc Boucher
1314 fix NetBSD modunload bug (pfil_add_hook done twice)
1316 patches for OpenBSD 2.1 - Craig Bevins <craigb@bitcom.net.au>
1318 3.2beta10 24/10/97 - Released
1320 fix fragment table entries allocated for NAT.
1322 fix tcp checksum calculations over mbuf/mblk boundaries
1324 fix panic for blen < 0 in ftp kernel proxy - marc boucher
1326 fix flushing of rules which have been grouped.
1328 3.2beta9 20/10/97 - Released
1330 some nit picking on solaris2 with SUNWspro - Michael Lyle <mrl@rpnet.net>
1332 ftp kernel proxy patches from Marc Boucher
1334 3.2beta8 13/10/97 - Released
1336 add support for passing ICMP errors back through NAT.
1338 IRIX port update - Marc Boucher
1340 calculate correct MIN size of packet to log for UDP - Marc Boucher
1342 need htons(ETHERTYPE_x) on little endian BSD boxes - Dave Huang
1344 copyright header fixups
1346 3.2beta7 23/09/97 - Released
1348 fickup problems introduced by prior merges & changes.
1350 3.2beta6 23/09/97 - Released
1352 patch for spin-reading race condition - Marc Boucher.
1354 IRIX port by Marc Boucher.
1356 compatibility updates for Linux to ipsend
1358 3.2beta5 13/09/97 - Released
1360 patches from Bernd Ernesti for NetBSD integration (mostly prototyping and
1361 compiler warning things)
1363 ipf -y will resync IP#'s allocated with 0/32 in NAT to match interface if it
1366 update manual pages and other documentation updates.
1368 3.2beta4 27/8/97 - Released
1370 enable setting IP and TCP options for iplang/
1372 Solaris2 patches from Marc Boucher.
1374 add groups for filter rules.
1376 3.2beta3 21/8/97 - Released
1378 patches for Solaris2 (interface panic solution ?): fix FIONREAD and
1379 replacing q_qinfo points - Marc Boucher <marc@CAM.ORG>
1381 change ipsend/* and ipsd/* copyright notices to be the same as ip filter's
1383 patch for SYN-ACK skew testing fix from Eric V. Smith <EricSmith@windsor.com>
1385 3.2beta2 6/8/97 - Released
1387 make it load on Solaris 2.3
1389 rewrote logging to remove solaris errors, introduced checking to see if the
1390 same packet is logged successively.
1392 fix filter cache to work when there are no rules loaded.
1394 add "raw" option to ipresend to send entire ethernet frames.
1396 nat list corruption bug - NetBSD - Klaus Klein
1398 3.2beta1 5/7/97 - Released
1400 patches from Jason Thorpe fixing: UNSIGNED_CHAR lossage, off_t being 64bits
1401 lossage, and other NetBSD bits.
1405 fixup fwtk patches and add protocol field for SIOCGNATL.
1407 rdr bugs reported by Alexander Romanyu (alexr@aix.krid.crimea.ua), with
1409 * rdr matched all packets of a given protocol (ignored ports).
1410 * severe bug in nat_delete which caused system crash/freeze.
1412 change Makefile so that CC isn't passed on for FreeBSD/NetBSD (will use
1413 the default CC - cc, not gcc)
1415 3.2alpha9 16/6/97 - Released
1417 added "skip" keyword.
1419 implement preauthentication of packets, as outlined by Guido.
1421 Make it compile as cleanly as possible with -Wall & general code cleanup
1423 getopt returns int, not char. Bernd Ernesti
1425 3.2alpha8 13/6/97 - Released
1427 code added to support "auth" rules which require a user program to allow them
1428 through. First revision and much of the code came from Guido.
1430 hex output from ipmon doesn't goto syslog when recovering from out of sync
1431 error. Luke Mewburn (lukem@connect.com.au)
1433 fix solaris2.6 lookup of destination ire's.
1435 ipnat doesn't throw away unused bits (after masking), causing it to
1436 behave incorrectly. Carson Gaspar
1438 NAT code doesn't include inteface name when matching - Alexey Mavrin
1441 replace old SunOS tcpip.h with new tcpip.h (from 4.4BSD) - Jason Thorpe.
1443 update install procedures to include ip_proxy.c
1445 mask out unused bits in NAT/RDR rules.
1447 use a generic type (u_32_t) for 32bit variables, rather than rely on
1448 u_long being such - Jason Thorpe.
1450 create a local "netinet" directory and include from ~netinet/*" rather than
1451 just "*" to make keeping the code working on ports easier.
1453 add an m_copydata and m_copyback for SunOS4 (based on 4.4BSD-Lite versions)
1455 documentation updates.
1457 NetBSD update from Jason Thorpe <thorpej@netbsd.org>
1459 allow RST's through with a matching SEQ # and 0 ACK. Guido Van Rooij
1461 ipmon uses excessive amounts of CPU on Solaris2 - Reinhard Bertram
1462 <Reinhard.Bertram@KOM.th-darmstadt.de>
1464 3.2alpha7 25/5/97 - Released
1466 add strlen for pre-2.2 kernels - Doug Kite <dkite@websgi.icomnet.com>
1468 setup bits and pieces for compiling into a FreeBSD-2.2 kernel.
1470 split up "bsd" targets. Now a separate netbsd/freebsd/bsd target.
1471 mln_ipl.c has been split up into itself and mlf_ipl.c (for freebsd).
1473 fix (negative) host matching in filtering.
1475 add sysctl interface for some variables when compiled into FreeBSD-2.2 kernels
1478 make all the candidates for kernel compiling include "netinet/..." and build
1479 a subdirectory "netinet" when compiling and symlink all .h files into this.
1481 add install make target to Makefile.ipsend
1483 3.2alpha6 8/5/97 - Released
1485 Add "!" (not) to hostname/ip matching.
1487 Automatically add packet info to the fragment cache if it is a fragment
1488 and we're translating addreses for.
1490 Automatically add packet info to the fragment cache if it is a fragment
1491 and we're "keeping state" for the packet.
1493 Solaris2 patches - Anthony Baxter (arb@connect.com.au)
1495 change install procedure for FreeBSD 2.2 to allow building to a kernel
1496 which is different to the running kernel.
1498 add FIONREAD for Solaris2!
1500 when expiring NAT table entries, if we would set a time to fr_tcpclosed
1501 (which is 1), make it fr_tcplaskack(20) so that the state tables have a
1506 add proxying skeleton support and sample ftp transparent proxy code.
1508 add printfs at startup to tell user what is happening.
1510 add packets & bytes for EXPIRE NAT log records.
1512 fix the "install-bsd" target in the root Makefile. Chris Williams
1515 Fixes for FreeBSD 2.2 (and later revs) to prevent panics. Julian Assange.
1517 3.2alpha4 2/4/97 - Released
1519 Some compiler warnings cleaned up.
1521 FreeBSD-2.2 patches for LKM completed.
1523 3.2alpha3 31/3/97 - Released
1525 ipmon changes: -N for reading NAT logfile, -S for reading state logfile.
1526 -a for reading all. -n now toggles hostname resolution.
1528 Add logging of new state entries and expiration of old state entries.
1529 count log successes and failures.
1531 Add logging of new NAT entries and expiration of old NAT entries.
1532 count log successes and failures.
1534 Use u_quad_t for records of bytes & packets where kept
1535 (IP Accounting: fr_hits, fr_bytes; IP state: is_pkts, is_bytes).
1537 Fixup use of CPU and DCPU in Makefiles.
1539 Fix broken 0/32 NAT mapping. Carl Makin <cmakin@nla.gov.au>
1543 Implement mapping to 0/32 as being an alias for automatically using the
1544 interface's first IP address.
1546 Implement separate minor devices for both NAT and IP state code.
1548 Fully prototype all functions.
1550 Fix Makefile problem due to attempt to fix Sun compiling problems.
1552 3.1.10 23/3/97 - Released
1554 ipfstat -a requires a -i or -o command line option too. Print an error
1555 when not present rather than attempt to do something.
1557 patch updates for SunOS4 for kernel compiling.
1558 patch for ipmon -s (flush's syslog file which isn't good). Andrew J. Schorr
1559 <schorr@ead.dsa.com>
1561 too many people hit their heads hard when compiling code into the kernel
1562 that doesn't let any packets through. (fil.c - IPF_NOMATCH)
1564 icmp-type parsing doesn't return any errors when it isn't constructed
1565 correctly. Neil Readwin
1567 Using "-conf" with modload on SunOS4 doesn't work.
1568 Timothy Demarest <demarest@arraycomm.com>
1570 Need to define ARCH in makefile for SunOS4 building. "make sunos4"
1571 in INSTALL.SunOS is incorrect. James R Grinter <jrg@blodwen.demon.co.uk>
1572 [all SunOS targets now run buildsunos]
1574 NAT lookups are still incorrect, matching non-TCP/UDP with TCP/UDP
1575 information. ArkanoiD <ark@paranoid.convey.ru>
1577 Need to check for __FreeBSD_version being 199511 rather than 199607
1578 in mln_ipl.c. Eric Feillant <Eric.Feillant@EUnet.fr>
1580 3.1.9 8/3/97 - Released
1582 fixed incorrect lookup of active NAT entries.
1584 patch for ip_deq() wrong for pre 2.1.6 FreeBSD.
1585 fyeung@fyeung8.netific.com (Francis Yeung)
1587 check for out with return-rst/return-icmp at wrong place - Erkki Ritoniemi
1590 text_readip returns the interface pointer pointing to text on stack -
1593 fix from Pradeep Krishnan for printout rules "with not opt sec".
1595 3.1.8 18/2/97 - Released
1597 Diffs for ip_output.c and ip_input.c updated to fix bug with fastroute and
1598 compiling warnings about reuse of m0.
1600 prevent use of return-rst and return-icmp with rules blocking packets going
1601 out, preventing panics in certain situations.
1603 loop forms in frag cache table - Yury Pshenychny <yura@rd.zgik.zaporizhzhe.ua>
1605 should use SPLNET/SPLX around expire routines in NAT/frag/state code.
1607 redeclared malloc in 44arp.c -
1609 3.1.7 8/2/97 - Released
1611 Macros used for ntohs/htons supplied with gcc don't always work very well
1612 when the assignment is the same variable being converted.
1614 Filter matching doesn't not match rule which checks tcp flags on packets
1615 which are fragments - David Wilson
1617 3.1.7beta 30/1/97 - Released
1619 Fix up NAT bugs introduced in last major change (now tested), including
1620 nat_delete(), nat_lookupredir(), checksum changes, etc.
1622 3.1.7alpha 30/1/97 - Released
1624 Many changes to NAT code, including contributions from Laurent Joncheray
1627 Use "NO_SLEEP" when allocating memory under SunOS.
1629 Make kernel printf's nicer for BSD/SunOS4
1631 Always do a checksum for packets being filtered going out and being
1632 processed by fastroute.
1634 Leave kernel to play with cdevsw on *BSD systems with LKM's.
1636 ipnat.1 man page fixes.
1638 3.1.6 21/1/97 - Released
1640 Allow NAT to work on BSD systems in conjunction with "pass .. to ifname"
1642 Memory leak introduced in 3.1.3 in NAT lists, clearing of NAT table tried
1643 to free memory twice.
1645 NAT recalculates IP header checksum based on difference between IP#'s and
1646 port numbers - should be just IP#'s (Solaris2 only)
1648 3.1.5 13/1/97 - Released
1650 fixed setting of NAT timeouts and use different timeouts for concurrent
1651 TCP sessions using the same IP# mapping (when port mapping isn't used)
1653 multiple loading/unloading of LKM's doesn't clean up cdevsw properly for
1656 3.1.4 10/1/97 - Released
1658 add command line options -C and -F to ipnat to flush NAT list and table
1660 ipnat -l loops on output - Neil Readwin (nreadwin@nysales.micrognosis.com)
1662 NetBSD/FreeBSD kernel malloc changes - Daniel Carosone
1664 3.1.3 10/1/97 - Released
1666 NAT chains not constructed correctly in hash tables - Antony Y.R Lu
1667 (antony@hawk.ee.ncku.edu.tw)
1669 Updated INSTALL.NetBSD, INSTALL.FreeBSD and INSTALL.Sol2
1671 man page update (ipf.5) from Daniel Carosone (dan@geek.com.au)
1673 ICMP header checksum update now included in NAT.
1675 Solaris2 needs to modify IP header checksums in ip_natin and ip_natout.
1677 3.1.2 4/12/96 - Released
1679 ipmon doesn't use syslog all the time when given -s option
1681 fixed mclput panic in ip_input.c and replace ntohs() with NTOHS() macro
1683 check the results of hostname resolution in ipnat
1685 "make *install" fixed for subdirectories.
1687 problems with "ARCH:=" and gnu make resolved
1689 parser reports an error for lines with whitespaces only rather than skipping
1690 them. D.Carosone@abm.com.au (Daniel Carosone)
1692 patches for integration into NetBSD-current (post 1.2).
1694 add an option to allow non-IP packets going up/down the stream on Solaris2
1695 to be dropped. John Bass.
1697 3.1.2beta 21/11/96 - Released
1699 make ipsend compile on Linux 2.0.24
1701 changes to TCP kept state algorithm, making it watch state on TCP
1702 connections in both directions. Also use the same algorithm for NAT TCP.
1704 -Wall cleanup - Bernd Ernesti
1706 added "or-block" for "pass .. log or-block" after a suggestion from
1707 David Oppenheim (davido@optimation.com.au)
1709 added subdirectories for building IP Filter in SunOS5/BSD for different
1712 Solaris2 fixes to logging and pre-filtering packet processing - 3.1.1p2
1714 mbuf logging not using mtod(), remove iplbusy - 3.1.1p1 1/11/96
1716 3.1.1 28/10/96 - Released
1718 Installation script fixes and deinstall scripts for IP Filter on:
1719 SunOS4/FreeBSD/NetBSD
1721 Man page fixes - Paul Dubois (dubois@primate.wisc.edu)
1723 Fix use of SOLARIS macro in ipmon, rewrote ipllog() (again!)
1725 parsing isn't completely case insensitive - David Wilson
1726 (davidw@optimation.com.au)
1728 Release ipl_mutex across uiomove() calls
1730 print entire rule entries out for "ipf -z" when zero'ing per-rule stats.
1732 ipfstat returns same output for "hits" in "ipfstat -aio" - Terletsky Slavik
1733 (ts@polynet.lviv.ua)
1735 New algorithm for setting timeouts for TCP connection (more closely follow
1736 TCP FSM) - Pradeep Krishnan (pkrishna@netcom.com)
1738 Track both window sizes for TCP connections through "keep state".
1740 Solaris2 doesn't like _KERNEL defined in stdargs.h - Jos van Wezel
1743 3.1.1-beta2 6/10/96 - Released
1745 Solaris2 fastroute/dup-to/to now works
1747 ipmon `record' reading rewritten
1749 Added post-NetBSD1.2 packet filter patches - Mathew Green (mrg@eterna.com.au)
1751 Attempt to use in_proto.c.diff, not "..diffs" for SunOS4 - David Wilson
1752 (davidw@optimation.com.au)
1754 Michael Ryan (mike@NetworX.ie) reports the following:
1755 * The Trumpet WinSock under Windows always sends its SYN packet with an ACK
1756 value of 1, unlike any other implementation I've seen, which would set it
1757 to zero. The "keep state" feature of IP Filter doesn't work when receiving
1758 non-zero ACK values on new connection requests.
1759 * */Makefile install rule doesn't install all the binaries/man pages
1760 * Make ipnat use "tcp/udp" instead of "tcpudp"
1761 * Print out "tcp/udp" properly
1762 * ipnat "portmap tcp" matches "portmap udp" when adding/removing
1763 * NAT dest. ip# increased by one on mask of 0xffffffff when it shouldn't
1765 3.1.1-beta 1/9/96 - Released
1767 add better detection of TCP connections closing to TCP state monitoring.
1769 fr_addstate() not called correctly for fragments. "keep state" and
1770 "keep frag" code don't work together 100% - Songqing Cai
1771 (songqing_cai@sterling.com)
1773 call to fr_addstate() incorrect for adding state in combination with keeping
1774 fragment information - Songqing Cai (songqing_cai@sterling.com)
1776 KFREE() passed fp (incorrect) and not fr (correct) in ip_frag.c - John Hood
1777 (cgull@smoke.marlboro.vt.us)
1779 make ipf parser recognise '\\' as a `continued line' marker - Dima Ruban
1782 3.1.1-alpha 23/8/96 - Released
1784 kernel panic's when ICMP packets go through NAT code
1786 stats aren't zero'd properly with ipf -Z
1788 ipnat doesn't show port numbers correctly all the time and also add the
1789 protocol (tcp/udp/tcpudp) to rdr output - Carson Gaspar (carson@lehman.com)
1791 fast checksum fixing not 100% - backout patch - Bill Dorsey (dorsey@lila.com)
1793 NetBSD-1.2 patches from - VaX#n8 <vax@linkdead.paranoia.com>
1795 Usage() call error in fils.c - Ajay Shekhawat (ajay@cedar.buffalo.edu)
1797 ip_optcopy() staticly defined in ip_output.c in SunOS4 - Nick Hall
1798 (nrh@tardis.ed.ac.uk)
1800 3.1.0 7/7/96 - Released
1802 Reformatted ipnat output to be compatible with it's input, so that
1803 "ipnat -l | ipnat -rf -" is possible.
1805 3.1.0beta 30/6/96 - Released
1807 NetBSD-1.2 patches from Greg Woods (woods@most.weird.com)
1809 kernel module must not be installed stripped (Solaris2), as created by
1810 "make package" for Solaris2 - Peter Heimann
1811 (peter@i3.informatik.rwth-aachen.de)
1813 3.1.0alpha 5/6/96 - Released
1815 include examples in package for solaris2
1817 patches for removing an extra ip header checksum (FreeBSD/NetBSD/SunOS)
1819 removed trailing space from printouts of rules in ipf.
1821 ipresend supports the same range of inputs that ipftest does.
1823 sending a duplicate copy of a packet to another network devices is now
1824 supported. ("dup-to")
1826 sending a packet to an arbitary interface is now supported, irrespective
1827 of its actual route, with no ttl decrement. Can also be routed without
1828 the ttl being decremented. ("to" and "fastroute").
1830 "call" option added to support calling a generic function if a packet is
1833 show all (upto 4) recorded bytes from the interface name in logging from
1836 support for using unix file permissions for read/write access on the device
1839 recursive mutex in nat_new() for Solaris 2.x - Per L. Hagen <per@stibo.dk>
1841 ipftest doesn't call initparse() for THISHOST - Catherine Allen
1842 (cla@connect.com.au)
1844 Man page corrections from Rex Bona (rex@pengo.comsmiths.com.au)
1846 3.0.4 10/4/96 - Released
1848 looop in `parsing' IP packets with optlen 0 for ip options.
1850 rule number not initialized and resulted in unexpected results for state
1853 option parsing and printing bugs - Pradeep Krishnan
1855 3.0.4beta 25/3/96 - Released
1857 wouldn't parse "keep flags keep state" correctly.
1859 SunOS4.1.x ip_input.c doesn't recognise all 1s broadcast address - Nigel Verdon
1861 patches for BSDI's BSD/OS 2.1 and libpcap reader on little endian systems
1862 from Thorsten Lockert <tholo@tetherless.com>
1864 b* functions in fil.c on Solaris 2.4
1866 3.0.3 17/3/96 - Released
1868 added patches to support IP Filter initialisation when compiled into the
1871 added -x option to ipmon to display hex dumps of logged packets.
1873 added -H option to ipftest to allow ascii-hex formatted input to specify
1874 arbitary IP packets.
1876 Sending TCP RSTs as a response now work for Solaris2 x86
1878 add patches to make IP Filter compile into NetBSD kernels properly.
1880 patch to stop SunOS 4.1.x kernels panicing with "data traps".
1882 ipfboot script unloads and reloads ipf module on Solaris2 if it is already
1883 loaded into the kernel.
1885 Installation of IP Filter as a Solaris2 package is now supported.
1887 Man pages for ipnat.4, ipnat.5 added.
1889 added some more regression tests and fixed up IP Filter to pass the new tests
1890 (previous versions failed some of the tests in set 12).
1892 IP option filter processing has changed so that saying "with opt lsrr" will
1893 check only for that one, but not mask out other options, so a packet with
1894 strict source routing, along with loose source routing will match all of
1895 "with opt lsrr", "with opt ssrr" and "with opt lsrr,ssrr".
1897 IPL_NAME needed in ipnat.c - Kelly (kelly@count04.mry.scruznet.com)
1899 patches for clean NetBSD compilation from Bernd Ernesti (bernd@arresum.inka.de)
1901 make install is incorrect - Julian Briggs (julian@lightwork.co.uk)
1903 strtol() returns 0x7fffffff for all negative numbers,
1904 printfr() generates incorrect output for "opt sec-class *",
1905 handling of "not opt xxx opt yyy" incorrect.
1906 - Minh Tonthat (minht@sbei.com)/Pradeep Krishnan (pradeepk@sbei.com)
1908 m_pullup() called only for input and not output; caused problems
1909 with filtering icmp - Nigel Verdon (verdenn@gb.swissbank.com)
1911 parsing problem for "port 1" and NetBSD patches incorrect -
1912 Andreas Gustafsson (gson@guava.araneus.fi)
1914 3.0.2 4/2/96 - Released
1916 Corrected bug where NAT recalculates checksums for fragments.
1918 make NAT recalculate UDP checksums (rather than setting them to 0),
1919 if they're non-zero.
1921 DNS patches - Real Page (Real.Page@Matrox.com)
1923 alteration of checksum recalculations in NAT code and addition of
1924 redirection with NAT - Mike Neuman
1926 core dump, if tcp/udp is used with a port number and not service name,
1927 in ipf - Mike Neuman (mcn@engarde.com)
1929 initparse() call, missing to prime "<thishost>" hook - Craig Bishop
1931 3.0.1 14/1/96 - Released
1933 miscellaneous patches for Solaris2
1935 3.0 14/1/96 - Released
1937 Patch included for FDDI, from Richard Ohnemus
1938 (Richard_Ohnemus@dallas.csd.sterling.com)
1940 Code cleanup for release.
1944 recursive mutex in ipfr_slowtimer fixed, reported by Craig Bishop
1946 recursive mutex in sending TCP RSTs fixed, reported by Tony Becker
1950 FIxup for Solaris2.5 install and interface name bug in ipftest from
1951 Julian Briggs (julian@lightwork.co.uk)
1953 Byte order patches for ipmon from Tony Becker (tony@mcrsys.com)
1957 Added the (somewhat warped) IP accounting as it exists in ipfw on FreeBSD.
1958 Note, this isn't really what one would call IP account, when compared to
1959 process accounting, sigh.
1961 Split up ipresend into iptest/ipresend/ipsend
1963 Added another m_pullup() inside fr_check() for BSD style kernels and
1964 added some checks to ipllog() to not log more than is present (for short
1967 Fixed bug where failed hostname/netname resolution goes undetecte and
1968 becomes 0.0.0.0 (any) (reported Guido van Rooij)
1970 3.0beta 11/11/95 - Released
1972 Rewrote the way rule testing is done, reducing the number of files needed and
1975 SIOCIPFFL was incorrectly affected by IPFILTER_LOG (Mathew Green)
1977 Patches from Guido van Rooij to fix sending back TCP RSTs on Net-2/Net-3
1978 BSD based Unixes (panic'd)
1980 Patches for FreeBSD/i86 ipmon from Riku Kalinen <riku@tequila.nixu.fi>
1981 (I think someone else already told me about these but they got lost :-/)
1983 Changed Makefile structure to build object files for different operating
1984 systems in separate directories by default.
1986 BSDI has ef0 for first ethernet interface
1988 Allow for a "not" operator before optional keywords.
1990 The "rule number" was being incorrectly incremented every time it went through
1991 the loop rather than when it matched a rule.
1993 2.8.2 24/10/95 - Released
1995 Fixed up problems with "textip" for doing lots of testing.
1997 Fixed bug in detection of "short" tcp/ip packets (all reported as being short).
1999 Solaris 2.4 port now works 100%.
2001 Man page errors reported and fixed.
2003 Removed duplicate entry in etc/services for login on port 49 (Craig Bishop).
2005 Fixed ipmon output to put a space after the log-letter.
2007 Patch from Guido van Rooij to fix parsing problem.
2009 2.8.1 15/10/95 - Released
2011 Added ttl and tos filtering.
2013 Patches for fixing up compilation and port problems (little endian)
2014 from Guido van Rooij <guido@IAEhv.nl>.
2016 Man page problems reported and fixed by Carson Gaspar <carson@lehman.com>.
2018 ipsend doesn't compile properly on Solaris2.4
2020 Lots of work done for Solaris2.4 to make it MT/MP safe and work.
2022 2.8 15/9/95 - Released
2024 ipmon can now send messages to syslogd (-s) and use names instead of
2027 IP packets are now "compiled" into a structure only containing filterable
2030 Added regression testing in the test/ subdirectory, using a new option
2031 (-b) with the ipftest program.
2033 Added "nomatch" return to filter results. These are counted and show
2034 up in reports from ipfstat.
2036 Moved filter code out of ip_fil.c and into fil.c - there is now only one
2037 instance of it in the package.
2039 Added Solaris 2.4 support.
2041 Added IPSO basic security option filtering.
2043 Added name support for filtering on all 19 named IP options.
2045 Patches from Ivan Brawley to log packet contents as well as packet headers.
2047 Update for sun/conf.c.diff from Ivan Brawley <ibrawley@awadi.com.AU>
2049 Added patches for FreeBSD 1, and added two new switches (-E, -D) to ipf,
2050 along with a new ioctl, SIOCFRENB.
2051 From: Dieter Dworkin Muller <dworkin@village.org>
2053 2.7.3 31/7.95 - Released
2055 Didn't compile cleanly without IPFILTER_LOG defined (Mathew Green).
2057 ipftest now deals with tcpdump3 binary output files (from libpcap) with -P.
2059 Brought ipftest program upto date with actual filter code.
2061 Filter would cause a match to occur when it wasn't meant to if the packet
2062 had short headers and was missing portions that should have been there.
2063 Err, it would rightly not match on them, but their absence caused a match
2064 when it shouldn't have been.
2066 2.7.2 26/7/95 - Released
2068 Problem with filtering just SYN flagged packets reported by
2069 Dieter Dworkin Muller <dworkin@village.org>. To solve this
2070 problem, added support for masking TCP flags for comparison "flags X/Y".
2072 2.7.1 9/7/95 - Released
2074 Added ip_dirbroadcast support for Sun ip_input.c
2076 Fixed up the install scripts for FreeBSD/NetBSD to recognise where they are
2079 2.7 7/7/95 - Released
2081 Added "return-rst" to return TCP RST's to TCP packets.
2083 Actually ported it to FreeBSD-i386 2.0.0, so it works there properly now.
2085 Added insertion of filter rules. Use "@<#>" at the beginning of a filter
2086 to insert a rule at row #.
2088 Filter keeps track of how many times each rule is matched.
2090 Changed compile time things to match kernel option (IPFILTER_LKM &
2093 Updated ip_input.c and ip_output.c with paches for 3.5 Multicast IP.
2094 (No change required for 3.6)
2096 Now includes TCP fragments which start inside the TCP header as being short.
2097 Added counting the number of times each rule is matched.
2100 2.6 11/5/95 - Released
2102 Added -n option to ipf: when supplied, no changes are made to the kernel.
2104 Added installation scripts for SunOS 4.1.x and NetBSD/FreeBSD/BSDI.
2106 Rewrote filtering to use a more generic mask & match procedure for
2107 checking if a packet matches a rule.
2109 2.5.2 27/4/95 - Released
2111 "tcp/udp" and a non-initialised pointer caused the "proto" to become
2112 a `random' value; added "ip#/dotted.mask" notation to the BNF.
2113 From Adam W. Feigin <feigin@iis.ee.ethz.ch>
2115 2.5.1 22/3/95 - Released
2117 "tcp/udp" had a strange effect (undesired) on getserv*() functions,
2118 causing protocol/service lookups to fail. Reported by Matthew Green.
2120 2.5 17/3/95 - Released
2122 Added a new keyword "all" to BNF and parsing of tcpdump/etherfind/snoop
2123 output through the ipftest program. Suggestions from:
2124 Michael Ciavarella (mikec@phyto.apana.org.au)
2126 Conflicts occur when "general" filter rules are used for ports and the
2127 lack of a "proto" when used with "port" matches other packets when only
2128 TCP/UDP are implied.
2129 Reported Matthew Green (mrg@fulcom.com.au);
2130 reported & fixed 6-8/3/95
2132 Added filtering of short TCP packets using "with short" 28/2/95
2133 (These can possibly slip by checks for the various flags). Short UDP
2134 or ICMP are dropped to the floor and logged.
2136 Added filtering of fragmented packets using "with frag" 24/2/95
2138 Port to NetBSD-current completed 20/2/95, using LKM.
2140 Added logging of the rule # which caused the logging to happen and the
2141 interface on which the packet is currently as suggested by
2142 Andreas Greulich (greulich@math-stat.unibe.ch) 10/2/95
2144 2.4 9/2/95 - Released
2145 Fixed saving of IP headers in ICMP packets.
2148 Added ipf -F [in|out|all] to flush filter rule sets (SIOCIPFFL).
2149 Fixed iplread() and iplsave() with help from Marc Huber.
2151 2.2 7/1/95 - Released
2152 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
2153 its own major char number dynamically when modload'ing. Fixed up
2154 use of <, >, <=, >= and >< for ports.
2156 2.1 21/12/94 - Released
2157 repackaged to include the correct ip_output.c and ip_input.c *goof*
2159 2.0 18/12/94 - Released
2160 added code to check for port ranges - complete.
2161 rewrote to work as a loadable kernel module - complete.
2164 added code for ouput filtering as well as input filtering and added support for logging to a simple character device of packet headers.
2166 1.0 22/04/93 - Released