Commit Graph

701 Commits

Author SHA1 Message Date
Gleb Smirnoff
6ca60beb25 Actually, if code had followed style(9), there would be less stupid errors
like the one fixed in r223416.

Noticed by:	julian
2011-06-24 12:55:16 +00:00
Gleb Smirnoff
0103912db8 One more braino from me.
Pointy hat to:	glebius
Submitted by:	Alexander V. Chernikov <melifaro ipfw.ru>
2011-06-22 08:20:01 +00:00
Ben Laurie
5f301949ef Fix clang warnings.
Approved by:	philip (mentor)
2011-06-18 13:56:33 +00:00
Gleb Smirnoff
ce97208218 - Fix my braino in the 220835, when I used strtok(). It isn't
applicable here, since modifies the string. Switch to strchr().
- Restore support for undocumented optional parameters of
  redir_port and redir_proto, that were disabled in 220835.
- While here, change !isalpha() checks on optinal parameters
  for isdigit().

Submitted by:	Alexander V. Chernikov <melifaro ipfw.ru>
PR:		kern/143653
2011-06-17 12:12:52 +00:00
Andrey V. Elsukov
1875bbfe54 Implement "global" mode for ipfw nat. It is similar to natd(8)
"globalport" option for multiple NAT instances.

If ipfw rule contains "global" keyword instead of nat_number, then
for each outgoing packet ipfw_nat looks up translation state in all
configured nat instances. If an entry is found, packet aliased
according to that entry, otherwise packet is passed unchanged.

User can specify "skip_global" option in NAT configuration to exclude
an instance from the lookup in global mode.

PR:		kern/157867
Submitted by:	Alexander V. Chernikov (previous version)
Tested by:	Eugene Grosbein
2011-06-14 13:35:24 +00:00
Andrey V. Elsukov
980ccceb94 Check nat id a bit more strictly. 2011-06-14 13:02:26 +00:00
Andrey V. Elsukov
71f3650a41 Initialize co.use_set variable before parsing each new rule.
PR:		bin/134975
MFC after:	2 weeks
2011-06-06 11:10:38 +00:00
Andrey V. Elsukov
796051d664 Increase buffer size for the command line.
PR:		bin/125370
Submitted by:	sem
MFC after:	2 weeks
2011-06-06 10:52:26 +00:00
Andrey V. Elsukov
41b6083752 Add tablearg support for ipfw setfib.
PR:		kern/156410
MFC after:	2 weeks
2011-05-30 05:37:26 +00:00
Sergey Kandaurov
3e71d7d04e mdoc:
- use a proper macro for interface name ipfw0.
- add missing section number for bpf cross reference.
2011-05-17 12:58:19 +00:00
Gleb Smirnoff
d5a805491e Rewrite NAT configuration parser, so that memory allocation size is
calculated dynamically.

PR:		kern/143653
2011-04-19 15:03:12 +00:00
Gleb Smirnoff
ffbeadc45a More whitespace fixes.
Checked with:	md5, diff -x -w
2011-04-18 22:09:03 +00:00
Gleb Smirnoff
5221106c04 Whitespace fixes.
Checked with:	md5, diff -w
2011-04-18 21:18:22 +00:00
Luigi Rizzo
ae99fd0e07 The first customer of the SO_USER_COOKIE option:
the "sockarg" ipfw option matches packets associated to
a local socket and with a non-zero so_user_cookie value.
The value is made available as tablearg, so it can be used
as a skipto target or pipe number in ipfw/dummynet rules.

Code by Paul Joe, manpage by me.

Submitted by:	Paul Joe
MFC after:	1 week
2010-11-12 13:05:17 +00:00
Ulrich Spörlein
2914feeb7e mdoc: make pages render with mandoc
It's a bit more pedantic regarding .Bl list elements. This has an added
benefit of unbreaking the ipfw(8) manpage, where groff was silently
skipping one list element.
2010-10-21 12:27:13 +00:00
Luigi Rizzo
81ab11744e document logging through bpf 2010-10-13 22:07:57 +00:00
Ulrich Spörlein
0d9deed52c mdoc: drop redundant .Pp and .LP calls
They have no effect when coming in pairs, or before .Bl/.Bd
2010-10-08 12:40:16 +00:00
Rebecca Cran
e7f8dd75b3 Fix incorrect usage of 'assure' and 'insure'.
Approved by: rrs (mentor)
2010-08-28 16:32:01 +00:00
Dag-Erling Smørgrav
1727cdb62a expand_number(3) takes a uint64_t * now.
MFC after:	3 weeks
2010-08-19 11:19:21 +00:00
Joel Dahl
c2025a7660 Fix typos, spelling, formatting and mdoc mistakes found by Nobuyuki while
translating these manual pages.  Minor corrections by me.

Submitted by:	Nobuyuki Koganemaru <n-kogane@syd.odn.ne.jp>
2010-08-16 15:18:30 +00:00
Gleb Smirnoff
fa597729aa Document that the "ngtee" action no longer accepts packet, and
thus don't depend on one_pass flag anymore.

This is a POLA violation, but it is quite difficult to restore
the old behavior with new code. Also, the new behavior matches
behavior of the older "tee" action, and this is more intuitive.
2010-07-27 14:31:39 +00:00
Luigi Rizzo
f40be7f6f9 better printing of headers when listing flows 2010-07-15 14:34:56 +00:00
Luigi Rizzo
d55ebfbd4e fix 64-bit build
Reported by:	Robert Noland
2010-04-19 16:35:47 +00:00
Luigi Rizzo
37133ba702 Slightly different handling of printf/snprintf for unaligned uint64_t,
which should improve readability, and also to ease the port to
platforms that do not support %llu

MFC after:	3 days
2010-04-19 15:11:45 +00:00
Luigi Rizzo
c083134268 fix a buffer overflow with large (100k+) number of input lines.
MFC after:	3 days
2010-04-12 08:27:53 +00:00
Hajimu UMEMOTO
c323a5fa93 Set net.inet6.ip6.fw.enable as well. 2010-04-06 12:28:08 +00:00
Luigi Rizzo
c72c2330d0 fix another bug in "ipfw set N ..."
Submitted by:	Marcin Wisnicki
2010-03-24 23:06:16 +00:00
Gavin Atkinson
67d438ccb8 Tweak language to make one point potentially clearer for non-native spekers
PR:		bin/121424
Submitted by:	"Julian H. Stacey" <jhs berklix.org>
2010-03-20 14:42:16 +00:00
Luigi Rizzo
b74331bfb8 accept lower case m as a synonym for Mega (bit/s or bytes/s). 2010-03-15 18:26:09 +00:00
Luigi Rizzo
f68f58e5eb print correctly commands of the form
ipfw add 100 allow ip from { 1.2.3.4 or 5.6.7.8 }

(note that the above example could be better written as

	ipfw add 100 allow dst-ip 1.2.3.4,5.6.7.8

Submitted by:	Riccardo Panicucci
2010-03-15 18:20:51 +00:00
Luigi Rizzo
f9f7bde3bc + implement (two lines) the kernel side of 'lookup dscp N' to use the
dscp as a search key in table lookups;

+ (re)implement a sysctl variable to control the expire frequency of
  pipes and queues when they become empty;

+ add 'queue number' as optional part of the flow_id. This can be
  enabled with the command

        queue X config mask queue ...

  and makes it possible to support priority-based schedulers, where
  packets should be grouped according to the priority and not some
  fields in the 5-tuple.
  This is implemented as follows:
  - redefine a field in the ipfw_flow_id (in sys/netinet/ip_fw.h) but
    without changing the size or shape of the structure, so there are
    no ABI changes. On passing, also document how other fields are
    used, and remove some useless assignments in ip_fw2.c

  - implement small changes in the userland code to set/read the field;

  - revise the functions in ip_dummynet.c to manipulate masks so they
    also handle the additional field;

There are no ABI changes in this commit.
2010-03-15 17:14:27 +00:00
Luigi Rizzo
72662a7566 Implement "lookup dscp N" which does a lookup of the DSCP (top 6 bits
of ip->ip_tos) in a table. This can be useful to direct traffic to
different pipes/queues according to the DSCP of the packet, as follows:

    ipfw add 100 queue tablearg lookup dscp 3 // table 3 maps dscp->queue

This change is a no-op (but harmless) until the two-line kernel
side is committed, which will happen shortly.
2010-03-15 15:43:35 +00:00
Luigi Rizzo
5007b59f26 implement listing of a subset of pipes/queues/schedulers.
The filtering of the output is done in the kernel instead of userland
to reduce the amount of data transfered.
2010-03-11 22:42:33 +00:00
Luigi Rizzo
a63e8ce9e7 add back DPADD (removed by mistake in a previous commit) 2010-03-08 14:43:55 +00:00
Luigi Rizzo
34ae843479 more documentation on new dummynet features. 2010-03-05 14:13:58 +00:00
Luigi Rizzo
f10f583fec make the listing of queues/pipes/schedulers handle the case of
data size increasing while we fetch the info.
2010-03-04 16:56:36 +00:00
Luigi Rizzo
c751221af4 fix handling of sets 2010-03-04 16:55:32 +00:00
Luigi Rizzo
6429067819 reduce diffs with the cross-platform version (windows needs
some extra initialization)
2010-03-04 16:54:56 +00:00
Luigi Rizzo
1009f2c9dd remove stale comment 2010-03-04 16:08:51 +00:00
Luigi Rizzo
cc4d3c30ea Bring in the most recent version of ipfw and dummynet, developed
and tested over the past two months in the ipfw3-head branch.  This
also happens to be the same code available in the Linux and Windows
ports of ipfw and dummynet.

The major enhancement is a completely restructured version of
dummynet, with support for different packet scheduling algorithms
(loadable at runtime), faster queue/pipe lookup, and a much cleaner
internal architecture and kernel/userland ABI which simplifies
future extensions.

In addition to the existing schedulers (FIFO and WF2Q+), we include
a Deficit Round Robin (DRR or RR for brevity) scheduler, and a new,
very fast version of WF2Q+ called QFQ.

Some test code is also present (in sys/netinet/ipfw/test) that
lets you build and test schedulers in userland.

Also, we have added a compatibility layer that understands requests
from the RELENG_7 and RELENG_8 versions of the /sbin/ipfw binaries,
and replies correctly (at least, it does its best; sometimes you
just cannot tell who sent the request and how to answer).
The compatibility layer should make it possible to MFC this code in a
relatively short time.

Some minor glitches (e.g. handling of ipfw set enable/disable,
and a workaround for a bug in RELENG_7's /sbin/ipfw) will be
fixed with separate commits.

CREDITS:
This work has been partly supported by the ONELAB2 project, and
mostly developed by Riccardo Panicucci and myself.
The code for the qfq scheduler is mostly from Fabio Checconi,
and Marta Carbone and Francesco Magno have helped with testing,
debugging and some bug fixes.
2010-03-02 17:40:48 +00:00
Ruslan Ermilov
bee10047c0 Fixed dependencies (make checkdpadd). 2010-02-25 20:24:19 +00:00
Luigi Rizzo
472099c4b0 implement a new match option,
lookup {dst-ip|src-ip|dst-port|src-port|uid|jail} N

which searches the specified field in table N and sets tablearg
accordingly.
With dst-ip or src-ip the option replicates two existing options.
When used with other arguments, the option can be useful to
quickly dispatch traffic based on other fields.

Work supported by the Onelab project.

MFC after:	1 week
2009-12-15 09:46:27 +00:00
Luigi Rizzo
2f12516b1f fix the indentation for addr: values
MFC after:	3 days
2009-12-15 09:32:35 +00:00
Luigi Rizzo
6e47ca1bc5 restore setting of sin_len (was removed in 1.146 last february) as
it seems that now it is necessary for 'forward' to work outside lo0.
The bug (and fix) was reported on 8.0. This patch probably applies
to RELENG_7 as well.
It seems that 'pf' has a similar bug.

Submitted by:	Lytochkin Boris
MFC after:	3 days
2009-12-06 18:04:26 +00:00
Luigi Rizzo
7139c5c496 fix argument type in the call to expand_number
Submitted by:	gcc 4.3
MFC after:	3 days
2009-12-04 14:18:30 +00:00
Luigi Rizzo
01ab76323b use qsort_r instead of heapsort;
staticize two functions.

MFC after:	3 days
2009-12-03 12:23:48 +00:00
Alexander Leidinger
ac2e492b19 Fix minor resource leak in a function.
Reviewed by:	luigi
MFC after:	1 week
2009-11-21 10:46:49 +00:00
Christian Brueffer
8fba046b09 Fix setfib(1) section number.
PR:		133765
Submitted by:	Konstantin Zolotukhin <erebus@gorodok.net>
MFC after:	3 days
2009-09-18 14:17:00 +00:00
Oleg Bulyzhin
a6f1444804 - 'burst' description rewritten.
Submitted by:	Ben Kaduk
Approved by:	re (kib)
2009-06-26 19:49:06 +00:00
Maxim Konovalov
067e91e8c2 o Kill grammar nits.
PR:		docs/136061
Submitted by:	Ben Kaduk
MFC after:	1 week
2009-06-26 05:09:00 +00:00
Oleg Bulyzhin
6882bf4d92 - fix dummynet 'fast' mode for WF2Q case.
- fix printing of pipe profile data.
- introduce new pipe parameter: 'burst' - how much data can be sent through
  pipe bypassing bandwidth limit.
2009-06-24 22:57:07 +00:00
Luigi Rizzo
7a459517da Permit the specification of bandwidth values within
"profile" files (bandwidth is mandatory when using a
profile, so it makes sense to have everything in one place).

Update the manpage accordingly.

Submitted by:	Marta Carbone
2009-06-08 14:32:29 +00:00
Luigi Rizzo
91dbeea7b6 add a missing format in a printf
Detected building with gcc 4.3.3

MFC after:	3 days
2009-06-08 10:53:18 +00:00
Luigi Rizzo
b87ce5545b Several ipfw options and actions use a 16-bit argument to indicate
pipes, queues, tags, rule numbers and so on.
These are all different namespaces, and the only thing they have in
common is the fact they use a 16-bit slot to represent the argument.

There is some confusion in the code, mostly for historical reasons,
on how the values 0 and 65535 should be used. At the moment, 0 is
forbidden almost everywhere, while 65535 is used to represent a
'tablearg' argument, i.e. the result of the most recent table() lookup.

For now, try to use explicit constants for the min and max allowed
values, and do not overload the default rule number for that.

Also, make the MTAG_IPFW declaration only visible to the kernel.

NOTE: I think the issue needs to be revisited before 8.0 is out:
the 2^16 namespace limit for rule numbers and pipe/queue is
annoying, and we can easily bump the limit to 2^32 which gives
a lot more flexibility in partitioning the namespace.

MFC after:	5 days
2009-06-05 16:16:07 +00:00
Luigi Rizzo
bbf46d80db remove a printf that was only useful for debugging.
MFC after:	3 days
2009-06-05 13:11:34 +00:00
Tom Rhodes
81bdd4cbcd Kill hard sentence break added in the previous revision. 2009-04-11 08:52:02 +00:00
Luigi Rizzo
4bb7ae9deb Add emulation of delay profiles, which lets you model various
types of MAC overheads such as preambles, link level retransmissions
and more.

Note- this commit changes the userland/kernel ABI for pipes
(but not for ordinary firewall rules) so you need to rebuild
kernel and /sbin/ipfw to use dummynet features.

Please check the manpage for details on the new feature.

The MFC would be trivial but it breaks the ABI, so it will
be postponed until after 7.2 is released.

Interested users are welcome to apply the patch manually
to their RELENG_7 tree.

Work supported by the European Commission, Projects Onelab and
Onelab2 (contract 224263).
2009-04-09 12:46:00 +00:00
Maxim Konovalov
d8ec4cdefb o Grammar. 2009-04-08 17:46:45 +00:00
Luigi Rizzo
de24303241 Various cleanup of text, moving a couple of paragraphs
above to avoid referencing undefined terms (humans are not compilers
but still care about these things).

Change some .Sh to .Ss to better reflect the structure of the text.

No new content.
2009-04-08 15:18:21 +00:00
Tom Rhodes
c4abdf1c01 Remove contractions, reword a sentence to avoid a double negative,
and bump document date for previous change.

OKed by:	piso
2009-04-07 13:51:41 +00:00
Paolo Pisati
0240be035c Improve a bit reass documentation:
-document fragment handling sysctls
-mention some caveats about fragments handling (and to deal with it)
2009-04-05 15:24:27 +00:00
Paolo Pisati
eb2e411915 Implement an ipfw action to reassemble ip packets: reass. 2009-04-01 20:23:47 +00:00
Christian Brueffer
cdd14ccabe Mdoc style, spelling, grammar and wording fixes. This manpage needs more work. 2009-03-19 10:42:07 +00:00
Luigi Rizzo
1fd3fc6988 move a variable declaration to the beginning of the block
(unfortunately, it is far away; we need to pack this code in
a better way).
2009-03-05 08:08:09 +00:00
Luigi Rizzo
d7a32e24af remove some signed/unsigned and one const/!const warning 2009-03-05 08:01:58 +00:00
Luigi Rizzo
3e9771d290 mark a function static, as it is 2009-03-05 08:01:19 +00:00
Paolo Pisati
37ce2656ec Add SCTP NAT support.
Submitted by: CAIA (http://caia.swin.edu.au)
2009-02-07 18:49:42 +00:00
Luigi Rizzo
a52e28c7dd Explain that we assume AF_INET and only use the addr and port field
from a struct sockaddr_in, so there is no need to initialize sin_len
2009-02-02 11:02:19 +00:00
Luigi Rizzo
d84d38734f remove duplicate #include 2009-02-02 10:58:05 +00:00
Luigi Rizzo
23c608c8f6 put the altq-related functions into a separate file.
Minor cleanup of the includes used by the various source files,
including annotations of why certain headers are used.
2009-02-01 16:00:49 +00:00
Luigi Rizzo
16e3606f57 Avoid the use of duplicated typedefs -- see the comment for details. 2009-01-28 11:43:12 +00:00
Luigi Rizzo
50a99912c1 fix printing of uint64_t values, so we can use WARNS=2 2009-01-27 20:26:45 +00:00
Luigi Rizzo
b361cf5805 fix wrong variable usage... 2009-01-27 12:24:53 +00:00
Luigi Rizzo
ead75a59f1 Put nat and ipv6 support in their own files.
Usual moving of code with no changes from ipfw2.c to the
newly created files, and addition of prototypes to ipfw2.h

I have added forward declarations for ipfw_insn_* in ipfw2.h
to avoid a global dependency on ip_fw.h
2009-01-27 12:01:30 +00:00
Luigi Rizzo
4e9c8ae7b5 Put dummynet-related code in a separate file.
To this purpose, add prototypes for global functions in ipfw2.h
and move there also the list of tokens used in various places in the code.
2009-01-27 11:06:59 +00:00
Luigi Rizzo
d36bf6e792 never mind, for the time being let's stick with WARNS=0 until
we sort out all proper printf formats.
2009-01-27 11:03:47 +00:00
Luigi Rizzo
3c0c871777 Start splitting the monster file in smaller blocks.
In this episode:
- introduce a common header with a minimal set of common definitions;
- bring the main() function and options parser in main.c
- rename the main functions with an ipfw_ prefix

No code changes except for the introduction of a global variable,
resvd_set_number, which stores the RESVD_SET value from ip_fw.h
and is used to remove the dependency of main.c from ip_fw.h
(and the subtree of dependencies) for just a single constant.
2009-01-27 10:18:55 +00:00
Luigi Rizzo
0e22daad2d put the usage() function inline, it was only 1 line and used once;
slightly reformat the help() text;
slightly correct the text for the 'extraneous filename' error message;
2009-01-27 09:27:13 +00:00
Luigi Rizzo
db7c522411 put all options in a single struct, and document them.
This will allow us to easily restore the original values when processing
commands from a file (where each individual line can have its own options).
2009-01-27 09:06:25 +00:00
Luigi Rizzo
2edea98d7f I believe this is safe to build with WARNS=2 now 2009-01-27 09:04:29 +00:00
Luigi Rizzo
be39e0b2b1 remove a couple of rarely used #define;
change PRINT_UINT from a macro to a function (renaming is
postponed to reduce clutter)
2009-01-27 07:40:16 +00:00
Luigi Rizzo
5f356082eb wrap all malloc/calloc/realloc calls so they exit on failure
without having to check in each place.

Remove an wrong strdup from previous commit.
2009-01-26 14:26:35 +00:00
Luigi Rizzo
c562063980 Some implementations of getopt() expect that argv[0] is always the
program name, and ignore that entry.  ipfw2.c code instead skips
this entry and starts with options at offset 0, relying on a more
tolerant implementation of the library.

This change fixes the issue by always passing a program name
in the first entry to getopt. The motivation for this change
is to remove a potential compatibility issue should we use
a different getopt() implementation in the future.

No functional changes.

Submitted by:	Marta Carbone (parts)
MFC after:	4 weeks
2009-01-26 14:03:39 +00:00
Luigi Rizzo
e5dbf7366f remove some useless #include,
document why timeconv.h is needed

MFC after:	3 days
2009-01-22 23:25:28 +00:00
Luigi Rizzo
daa9733afd Fix a number of (innocuous) warnings, and remove a useless test.
There are still several signed/unsigned warnings left, which
require a bit more study for a proper fix.

This file has grown beyond reasonable limits.

We really need to split it into separate components (ipv4, ipv6,
dummynet, nat, table, userland-kernel communication ...) so we can
make mainteinance easier.

MFC after:	1 weeks
2009-01-20 18:16:31 +00:00
Paolo Pisati
a21e097b2e Update the ipfw man page to reflect last change (-q option with nat option).
MFC after:	3 days
2008-12-18 21:46:18 +00:00
Paolo Pisati
3fc7bd58bc Honor the quiet (-q) option while adding a nat rule.
Submitted by:	Andrey V. Elsukov<bu7cher@yandex.ru>
MFC after:	3 days
2008-12-18 21:37:31 +00:00
Maxim Konovalov
20e58023f4 o Remove a debug code and restore an accidentally deleted code
in a previous commit.
2008-10-14 17:59:39 +00:00
Maxim Konovalov
92531c02e6 o Do nothing in show_nat() for a test mode (-n). This prevents
show_nat() from endless loop and makes work ipfw -n nat <...>.

PR:		bin/128064
Submitted by:	sem
MFC after:	1 month
2008-10-14 17:53:26 +00:00
Roman Kurakin
e7ef3e9494 Fix the build.
Noted by: ganbold@
2008-09-27 15:58:54 +00:00
Roman Kurakin
e927c2b2e6 * add all keyword for table list & flush actions.
* add tables_max sysctl.
* add default_rule sysctl.

PR:		127058 (partially)
2008-09-27 15:09:00 +00:00
Roman Kurakin
c15c249000 Add keyword all in addtion to the table number for the 'list' and the
'flush' actions on tables.  Part of PR: 127058.

PR:		127058 (based on)
MFC after:	1 month
2008-09-27 14:30:34 +00:00
Giorgos Keramidas
7bf717b721 Unbreak the build. 2008-09-22 04:12:27 +00:00
Roman Kurakin
eba1dd2124 Add the check of the table number. 2008-09-21 21:46:56 +00:00
Roman Kurakin
5ec36cd651 Move table list to a separate function. 2008-09-21 12:54:09 +00:00
Roman Kurakin
b0000a98c4 Free allocated memory. 2008-09-20 19:25:02 +00:00
Roman Kurakin
015002df0d Remove some unused variables. 2008-09-20 16:46:19 +00:00
Roman Kurakin
b88a2fe170 Style(9) the show_nat() function. 2008-09-20 16:17:49 +00:00
Roman Kurakin
03d4b38d9e Do not do the useless job for an empty table.
MFC after:	1 month
2008-09-20 15:54:22 +00:00
Roman Kurakin
759dd6f7f7 Use IPFW_DEFAULT_RULE instead of hardcoded value since now it is
available.

MFC after:	5 days.
2008-09-06 17:23:37 +00:00
Ivan Voras
0d6ff382c3 Trivial typo fix.
Approved by:	gnn (mentor)
2008-08-27 15:30:09 +00:00
Julian Elischer
2cc8ab2a83 Slight wordsmithing. prompted by danger@ 2008-08-01 23:31:28 +00:00
Julian Elischer
bc20b62b0e Document the use of the tablearg keyword together with the skipto command. 2008-08-01 22:34:01 +00:00
Julian Elischer
c7d1bf0bd9 Note that setfib is not a terminal rule. 2008-07-24 18:39:36 +00:00
Julian Elischer
05b0fdac8c Change two variables to size_t to improve portability.
Submitted by:	Xin Li
2008-05-10 15:02:56 +00:00
Julian Elischer
8b07e49a00 Add code to allow the system to handle multiple routing tables.
This particular implementation is designed to be fully backwards compatible
and to be MFC-able to 7.x (and 6.x)

Currently the only protocol that can make use of the multiple tables is IPv4
Similar functionality exists in OpenBSD and Linux.

From my notes:

-----

  One thing where FreeBSD has been falling behind, and which by chance I
  have some time to work on is "policy based routing", which allows
  different
  packet streams to be routed by more than just the destination address.

  Constraints:
  ------------

  I want to make some form of this available in the 6.x tree
  (and by extension 7.x) , but FreeBSD in general needs it so I might as
  well do it in -current and back port the portions I need.

  One of the ways that this can be done is to have the ability to
  instantiate multiple kernel routing tables (which I will now
  refer to as "Forwarding Information Bases" or "FIBs" for political
  correctness reasons). Which FIB a particular packet uses to make
  the next hop decision can be decided by a number of mechanisms.
  The policies these mechanisms implement are the "Policies" referred
  to in "Policy based routing".

  One of the constraints I have if I try to back port this work to
  6.x is that it must be implemented as a EXTENSION to the existing
  ABIs in 6.x so that third party applications do not need to be
  recompiled in timespan of the branch.

  This first version will not have some of the bells and whistles that
  will come with later versions. It will, for example, be limited to 16
  tables in the first commit.
  Implementation method, Compatible version. (part 1)
  -------------------------------
  For this reason I have implemented a "sufficient subset" of a
  multiple routing table solution in Perforce, and back-ported it
  to 6.x. (also in Perforce though not  always caught up with what I
  have done in -current/P4). The subset allows a number of FIBs
  to be defined at compile time (8 is sufficient for my purposes in 6.x)
  and implements the changes needed to allow IPV4 to use them. I have not
  done the changes for ipv6 simply because I do not need it, and I do not
  have enough knowledge of ipv6 (e.g. neighbor discovery) needed to do it.

  Other protocol families are left untouched and should there be
  users with proprietary protocol families, they should continue to work
  and be oblivious to the existence of the extra FIBs.

  To understand how this is done, one must know that the current FIB
  code starts everything off with a single dimensional array of
  pointers to FIB head structures (One per protocol family), each of
  which in turn points to the trie of routes available to that family.

  The basic change in the ABI compatible version of the change is to
  extent that array to be a 2 dimensional array, so that
  instead of protocol family X looking at rt_tables[X] for the
  table it needs, it looks at rt_tables[Y][X] when for all
  protocol families except ipv4 Y is always 0.
  Code that is unaware of the change always just sees the first row
  of the table, which of course looks just like the one dimensional
  array that existed before.

  The entry points rtrequest(), rtalloc(), rtalloc1(), rtalloc_ign()
  are all maintained, but refer only to the first row of the array,
  so that existing callers in proprietary protocols can continue to
  do the "right thing".
  Some new entry points are added, for the exclusive use of ipv4 code
  called in_rtrequest(), in_rtalloc(), in_rtalloc1() and in_rtalloc_ign(),
  which have an extra argument which refers the code to the correct row.

  In addition, there are some new entry points (currently called
  rtalloc_fib() and friends) that check the Address family being
  looked up and call either rtalloc() (and friends) if the protocol
  is not IPv4 forcing the action to row 0 or to the appropriate row
  if it IS IPv4 (and that info is available). These are for calling
  from code that is not specific to any particular protocol. The way
  these are implemented would change in the non ABI preserving code
  to be added later.

  One feature of the first version of the code is that for ipv4,
  the interface routes show up automatically on all the FIBs, so
  that no matter what FIB you select you always have the basic
  direct attached hosts available to you. (rtinit() does this
  automatically).

  You CAN delete an interface route from one FIB should you want
  to but by default it's there. ARP information is also available
  in each FIB. It's assumed that the same machine would have the
  same MAC address, regardless of which FIB you are using to get
  to it.

  This brings us as to how the correct FIB is selected for an outgoing
  IPV4 packet.

  Firstly, all packets have a FIB associated with them. if nothing
  has been done to change it, it will be FIB 0. The FIB is changed
  in the following ways.

  Packets fall into one of a number of classes.

  1/ locally generated packets, coming from a socket/PCB.
     Such packets select a FIB from a number associated with the
     socket/PCB. This in turn is inherited from the process,
     but can be changed by a socket option. The process in turn
     inherits it on fork. I have written a utility call setfib
     that acts a bit like nice..

         setfib -3 ping target.example.com # will use fib 3 for ping.

     It is an obvious extension to make it a property of a jail
     but I have not done so. It can be achieved by combining the setfib and
     jail commands.

  2/ packets received on an interface for forwarding.
     By default these packets would use table 0,
     (or possibly a number settable in a sysctl(not yet)).
     but prior to routing the firewall can inspect them (see below).
     (possibly in the future you may be able to associate a FIB
     with packets received on an interface..  An ifconfig arg, but not yet.)

  3/ packets inspected by a packet classifier, which can arbitrarily
     associate a fib with it on a packet by packet basis.
     A fib assigned to a packet by a packet classifier
     (such as ipfw) would over-ride a fib associated by
     a more default source. (such as cases 1 or 2).

  4/ a tcp listen socket associated with a fib will generate
     accept sockets that are associated with that same fib.

  5/ Packets generated in response to some other packet (e.g. reset
     or icmp packets). These should use the FIB associated with the
     packet being reponded to.

  6/ Packets generated during encapsulation.
     gif, tun and other tunnel interfaces will encapsulate using the FIB
     that was in effect withthe proces that set up the tunnel.
     thus setfib 1 ifconfig gif0 [tunnel instructions]
     will set the fib for the tunnel to use to be fib 1.

  Routing messages would be associated with their
  process, and thus select one FIB or another.
  messages from the kernel would be associated with the fib they
  refer to and would only be received by a routing socket associated
  with that fib. (not yet implemented)

  In addition Netstat has been edited to be able to cope with the
  fact that the array is now 2 dimensional. (It looks in system
  memory using libkvm (!)). Old versions of netstat see only the first FIB.

  In addition two sysctls are added to give:
  a) the number of FIBs compiled in (active)
  b) the default FIB of the calling process.

  Early testing experience:
  -------------------------

  Basically our (IronPort's) appliance does this functionality already
  using ipfw fwd but that method has some drawbacks.

  For example,
  It can't fully simulate a routing table because it can't influence the
  socket's choice of local address when a connect() is done.

  Testing during the generating of these changes has been
  remarkably smooth so far. Multiple tables have co-existed
  with no notable side effects, and packets have been routes
  accordingly.

  ipfw has grown 2 new keywords:

  setfib N ip from anay to any
  count ip from any to any fib N

  In pf there seems to be a requirement to be able to give symbolic names to the
  fibs but I do not have that capacity. I am not sure if it is required.

  SCTP has interestingly enough built in support for this, called VRFs
  in Cisco parlance. it will be interesting to see how that handles it
  when it suddenly actually does something.

  Where to next:
  --------------------

  After committing the ABI compatible version and MFCing it, I'd
  like to proceed in a forward direction in -current. this will
  result in some roto-tilling in the routing code.

  Firstly: the current code's idea of having a separate tree per
  protocol family, all of the same format, and pointed to by the
  1 dimensional array is a bit silly. Especially when one considers that
  there is code that makes assumptions about every protocol having the
  same internal structures there. Some protocols don't WANT that
  sort of structure. (for example the whole idea of a netmask is foreign
  to appletalk). This needs to be made opaque to the external code.

  My suggested first change is to add routing method pointers to the
  'domain' structure, along with information pointing the data.
  instead of having an array of pointers to uniform structures,
  there would be an array pointing to the 'domain' structures
  for each protocol address domain (protocol family),
  and the methods this reached would be called. The methods would have
  an argument that gives FIB number, but the protocol would be free
  to ignore it.

  When the ABI can be changed it raises the possibilty of the
  addition of a fib entry into the "struct route". Currently,
  the structure contains the sockaddr of the desination, and the resulting
  fib entry. To make this work fully, one could add a fib number
  so that given an address and a fib, one can find the third element, the
  fib entry.

  Interaction with the ARP layer/ LL layer would need to be
  revisited as well. Qing Li has been working on this already.

  This work was sponsored by Ironport Systems/Cisco

Reviewed by:    several including rwatson, bz and mlair (parts each)
Obtained from:  Ironport systems/Cisco
2008-05-09 23:03:00 +00:00
David Malone
2b2c3b23d1 Dummynet has a limit of 100 slots queue size (or 1MB, if you give
the limit in bytes) hard coded into both the kernel and userland.
Make both these limits a sysctl, so it is easy to change the limit.
If the userland part of ipfw finds that the sysctls don't exist,
it will just fall back to the traditional limits.

(100 packets is quite a small limit these days. If you want to test
TCP at 100Mbps, 100 packets can only accommodate a DBP of 12ms.)

Note these sysctls in the man page and warn against increasing them
without thinking first.

MFC after:      3 weeks
2008-02-27 13:52:33 +00:00
Paolo Pisati
f94a7fc0b5 Add table/tablearg support to ipfw's nat.
MFC After: 1 week
2008-02-24 15:37:45 +00:00
Paolo Pisati
d956bdf35e -Fix display of nat range.
-Whitespace elimination.

Bug spotted by: Luiz Otavio O Souza
MFC After: 3 days
2008-02-21 22:55:54 +00:00
Paolo Pisati
c879f6ecd7 Fix display of multiple nat rules.
Bug spotted by: Luiz Otavio O Souza
PR:	120734
MFC After: 3 days
2008-02-18 20:26:34 +00:00
Julian Elischer
0943a3b7ec Instead of using a heuristic to decide whether to display
table 'values' as IP addresses, use an explicit argument (-i).
This is a 'POLA' issue. This is a low risk change and should be MFC'd
to RELENG_6 and RELENG 7. it might be put as an errata item for 6.3.
(not sure about 6.2).

Fix suggested by: Eugene Grosbein
PR: 	120720
MFC After: 3 days
2008-02-18 19:56:09 +00:00
Yaroslav Tykhiy
5702f0f0a5 Add a note that ipfw states do not implicitly match ICMP error messages. 2008-02-07 11:00:42 +00:00
Robert Watson
bb5081a7eb Hide ipfw internal data structures behind IPFW_INTERNAL rather than
exposing them to all consumers of ip_fw.h.  These structures are
used in both ipfw(8) and ipfw(4), but not part of the user<->kernel
interface for other applications to use, rather, shared
implementation.

MFC after:	3 days
Reported by:	Paul Vixie <paul at vix dot com>
2008-01-25 14:38:27 +00:00
Maxim Konovalov
8c03c6c023 o Fix ipfw(8) command line parser bug: "ipfw nat 1 config if" requires an argument.
PR:		bin/119815
Submitted by:	Dierk Sacher
MFC after:	1 week
2008-01-20 08:31:35 +00:00
Oleg Bulyzhin
d60810f26e Calculate p.fs.lookup_step correctly. This should prevent zeroing of
w_q_lookup table (used in RED algorithm for (1 - w_q)^t computation).

MFC after:	1 months
2007-12-17 10:25:56 +00:00
Daniel Gerzo
89396d2512 Polish this manual page a bit:
- refer to the dummynet(4) man page only once, later use rather
  the .Nm macro.
- use .Va macro when refering to the sysctl variables
- grammar and markup fixes

Reviewed by:	keramida, trhodes, ru (roughly)
MFC-after:	1 week
2007-11-26 00:36:40 +00:00
Oleg Bulyzhin
8d1e3aed2d - New sysctl variable: net.inet.ip.dummynet.io_fast
If it is set to zero value (default) dummynet module will try to emulate
  real link as close as possible (bandwidth & latency): packet will not leave
  pipe faster than it should be on real link with given bandwidth.
  (This is original behaviour of dummynet which was altered in previous commit)
  If it is set to non-zero value only bandwidth is enforced: packet's latency
  can be lower comparing to real link with given bandwidth.

- Document recently introduced dummynet(4) sysctl variables.

Requested by:	luigi, julian
MFC after:	3 month
2007-11-17 21:54:57 +00:00
Maxim Konovalov
f5800732ef o Fix indentation. No functional changes. 2007-10-27 22:04:19 +00:00
Rui Paulo
09a35a341c Change IPTOS_CE to IPTOS_ECN_CE.
Approved by:	njl (mentor)
2007-10-19 18:24:19 +00:00
Rui Paulo
06d703ef93 Comply with the removal of IPTOS_CE and IPTOS_ECT.
Discussed on freebsd-net with no objections.

Approved by:	njl (mentor), rwatson
2007-10-19 12:48:02 +00:00
Maxim Konovalov
47bc471a7e o Fix a typo in ipfw table usage example.
PR:		docs/117172
Submitted by:	novel
MFC after:	1 week
2007-10-14 09:12:46 +00:00
Maxim Konovalov
087aa087d5 o Cosmetic: fix the issue when "ipfw(8) show" produces "not" twice:
$ ipfw -n add 1 allow layer2 not mac-type ip
00001 allow ip from any to any layer2 not not mac-type 0x0800

PR:		bin/115372
Submitted by:	Andrey V. Elsukov
Approved by:	re (hrs)
MFC after:	3 weeks
2007-09-23 16:29:22 +00:00
Maxim Konovalov
4a296ec798 o Fix bug I introduced in the previous commit (ipfw set extention):
pack a set number correctly.

Submitted by:	oleg

o Plug a memory leak.

Submitted by:	oleg and Andrey V. Elsukov
Approved by:	re (kensmith)
MFC after:	1 week
2007-08-26 18:38:31 +00:00
Bjoern A. Zeeb
cc977adc71 Rename option IPSEC_FILTERGIF to IPSEC_FILTERTUNNEL.
Also rename the related functions in a similar way.
There are no functional changes.

For a packet coming in with IPsec tunnel mode, the default is
to only call into the firewall with the "outer" IP header and
payload.

With this option turned on, in addition to the "outer" parts,
the "inner" IP header and payload are passed to the
firewall too when going through ip_input() the second time.

The option was never only related to a gif(4) tunnel within
an IPsec tunnel and thus the name was very misleading.

Discussed at:			BSDCan 2007
Best new name suggested by:	rwatson
Reviewed by:			rwatson
Approved by:			re (bmah)
2007-08-05 16:16:15 +00:00
Christian S.J. Peron
f5cbef3c2d Remove references to mpsafenet. This option no longer exists.
Approved by:	re@ (bmah)
2007-08-04 20:35:42 +00:00
Maxim Konovalov
d069a5d478 o Make ipfw set more robust -- now it is possible:
- to show a specific set: ipfw set 3 show
    - to delete rules from the set: ipfw set 9 delete 100 200 300
    - to flush the set: ipfw set 4 flush
    - to reset rules counters in the set: ipfw set 1 zero

PR:		kern/113388
Submitted by:	Andrey V. Elsukov
Approved by:	re (kensmith)
MFC after:	6 weeks
2007-06-18 17:52:37 +00:00
Maxim Konovalov
bd1d3456dc o Teach get_mac_addr_mask() to not silently accept incorrect MAC
addresses.
o Swap a couple of magic 6s by ETHER_ADDR_LEN.

PR:		bin/80913
Submitted by:	Andrey V. Elsukov
MFC after:	1 month
2007-05-09 18:31:49 +00:00
Bjoern A. Zeeb
7a92401aea Add support for filtering on Routing Header Type 0 and
Mobile IPv6 Routing Header Type 2 in addition to filter
on the non-differentiated presence of any Routing Header.

MFC after:	3 weeks
2007-05-04 11:15:41 +00:00
Maxim Konovalov
5b41efdd54 o Make ipfw(8) show rules with mac/mac-type options correctly.
Before:

$ ipfw -n add 100 count icmp from any to any mac-type 0x01
00100 count icmp 0x0001
$ ipfw -n add 100 count icmp from any to any mac any any
00100 count icmp MAC any any any

After:

$ ipfw -n add 100 count icmp from any to any mac-type 0x01
00100 count icmp from any to any mac-type 0x0001
$ ipfw -n add 100 count icmp from any to any mac any any
00100 count icmp from any to any MAC any any

PR:		bin/112244
Submitted by:	Andrey V. Elsukov
MFC after:	1 month
2007-04-30 17:39:30 +00:00
Maxim Konovalov
1d9f903ae8 o Add missed w/space in the error message.
Spotted by:	Ivan Voras
MFC after:	1 week
2007-04-17 16:36:24 +00:00
Paolo Pisati
8c67c5a3f4 Mention the nat command in the synopsis and in the action section.
Approved by: glebius (mentor)
2007-02-15 14:32:26 +00:00
Max Laier
c2221c3536 Fix a parsing bug when specifying more than one address with dotted decimal
netmask.

Reported by:	Igor Anishchuk
PR:		kern/107565
MFC after:	3 days
2007-01-07 03:02:02 +00:00
Paolo Pisati
ff2f6fe80f Summer of Code 2005: improve libalias - part 2 of 2
With the second (and last) part of my previous Summer of Code work, we get:

-ipfw's in kernel nat

-redirect_* and LSNAT support

General information about nat syntax and some examples are available
in the ipfw (8) man page. The redirect and LSNAT syntax are identical
to natd, so please refer to natd (8) man page.

To enable in kernel nat in rc.conf, two options were added:

o firewall_nat_enable: equivalent to natd_enable

o firewall_nat_interface: equivalent to natd_interface

Remember to set net.inet.ip.fw.one_pass to 0, if you want the packet
to continue being checked by the firewall ruleset after being
(de)aliased.

NOTA BENE: due to some problems with libalias architecture, in kernel
nat won't work with TSO enabled nic, thus you have to disable TSO via
ifconfig (ifconfig foo0 -tso).

Approved by: glebius (mentor)
2006-12-29 21:59:17 +00:00
Tom Rhodes
1cc7aa7d96 Add a note about rule syntax compared to the shell used so users do not get
frustraited when:
ipfw add 201 deny ip from any to table(2) in via xl1
returns "Badly placed ( )'s"

PR:	73638
2006-10-09 22:12:08 +00:00
Giorgos Keramidas
223ccb5450 When addr/mask examples are given, show both a host and network
address, to avoid confusing the users that a full address is
always required.

Submitted by:   Josh Paetzel <josh@tcbug.org> (through freebsd-doc)
MFC after:	3 days
2006-10-04 19:29:05 +00:00
Maxim Konovalov
c24384096d o Check for a required "pathname" argument presence.
PR:		bin/95146
Submitted by:	candy-sendpr@kgc.co.jp
MFC after:	3 weeks
2006-09-29 08:00:40 +00:00
Ruslan Ermilov
8266d47670 Markup fixes. 2006-09-18 11:55:10 +00:00
John Hay
268f526c05 Check the length of the ipv4 and ipv6 address lists. It must be less
than F_LEN_MASK.

MFC after:	5 days
2006-09-16 19:27:40 +00:00
John Hay
e7f2ec5364 Use bzero() to clear the whole ipfw_insn_icmp6 structure in fill_icmp6types(),
otherwise this command

ipfw add allow ipv6-icmp from any to 2002::1 icmp6types 1,2,128,129

turns into icmp6types 1,2,32,33,34,...94,95,128,129

PR:		102422 (part 1)
Submitted by:	Andrey V. Elsukov <bu7cher at yandex.ru>
MFC after:	5 days
2006-09-16 06:34:30 +00:00
David Malone
cb0bfd9b89 A pipe bandwidth of 10MBits/s should probably
be understood as    10Mbits/s not 10MBytes/s.

Submitted by:	Gavin McCullagh <gavin.mccullagh@nuim.ie>
MFC after:	1 week
2006-08-23 14:29:18 +00:00
David Malone
e28cb02537 Regigle parens to try and get the intended affect. This should fix people
having trouble with the "me6" keyword. Also, we were using inet_pton on
the wrong variable in one place.

Reviewed by:	mlaier (previous version of patch)
Obtained from:	Sascha Blank (inet_pton change)
MFC after:	1 week
2006-08-20 20:10:36 +00:00
Julian Elischer
1b97421aae Fix typo. 2006-08-20 05:42:58 +00:00
Julian Elischer
afad78e259 comply with style police
Submitted by:	ru
MFC after:	1 month
2006-08-18 22:36:05 +00:00
Julian Elischer
c487be961a Allow ipfw to forward to a destination that is specified by a table.
for example:
  fwd tablearg ip from any to table(1)
where table 1 has entries of the form:
1.1.1.0/24 10.2.3.4
208.23.2.0/24 router2

This allows trivial implementation of a secondary routing table implemented
in the firewall layer.

I expect more work (under discussion with Glebius) to follow this to clean
up some of the messy parts of ipfw related to tables.

Reviewed by:	Glebius
MFC after:	1 month
2006-08-17 22:49:50 +00:00
Julian Elischer
3095bda433 Take IP_FIREWALL_EXTENDED out of the man page too.
MFC after: 1 week
2006-08-17 00:46:06 +00:00
Stefan Farfeleder
299652afbc Use the SLIST_NEXT macro instead of sle_next.
Checked with:	cmp(1)
2006-08-05 13:58:50 +00:00
Oleg Bulyzhin
84fd82e86f Specify correct argument range for tag/untag keywords.
Approved by:	glebius (mentor)
2006-07-25 11:07:31 +00:00
Oleg Bulyzhin
254c472561 Add support of 'tablearg' feature for:
- 'tag' & 'untag' action parameters.
- 'tagged' & 'limit' rule options.
Rule examples:
	pipe 1 tag tablearg ip from table(1) to any
	allow ip from any to table(2) tagged tablearg
	allow tcp from table(3) to any 25 setup limit src-addr tablearg

sbin/ipfw/ipfw2.c:
1) new macros
   GET_UINT_ARG - support of 'tablearg' keyword, argument range checking.
   PRINT_UINT_ARG - support of 'tablearg' keyword.
2) strtoport(): do not silently truncate/accept invalid port list expressions
   like: '1,2-abc' or '1,2-3-4' or '1,2-3x4'. style(9) cleanup.

Approved by:	glebius (mentor)
MFC after:	1 month
2006-06-15 09:39:22 +00:00
Max Laier
81bd0dc0bc Print dynamic rules for IPv6 as well.
PR:		bin/98349
Submitted by:	Mark Andrews
MFC after:	2 weeks
2006-06-02 05:17:17 +00:00
Oleg Bulyzhin
6a7d5cb645 Implement internal (i.e. inside kernel) packet tagging using mbuf_tags(9).
Since tags are kept while packet resides in kernelspace, it's possible to
use other kernel facilities (like netgraph nodes) for altering those tags.

Submitted by:	Andrey Elsukov <bu7cher at yandex dot ru>
Submitted by:	Vadim Goncharov <vadimnuclight at tpu dot ru>
Approved by:	glebius (mentor)
Idea from:	OpenBSD PF
MFC after:	1 month
2006-05-24 13:09:55 +00:00
Max Laier
926bbf905e For src/dest parsing take off the netmask before checking for AF with
inet_pton.  This fixes cases like "fe02::/16".

PR:		bin/91245
Reported by:	Fredrik Lindberge
2006-05-14 03:53:04 +00:00
Max Laier
270404f55a Update manpage for net.inet6.ip6.fw.enable sysctl.
Requested by:	bz
2006-05-12 18:09:33 +00:00
Julian Elischer
905c41b537 Amazing.. two screwups in one commit.
I'm piling on thise pointy hats on top of each other.
At least they nest..
2006-03-31 12:54:17 +00:00
Julian Elischer
dbadd6b028 I can't believe that no-one noticed that I broke ipfw table del
for over a month!
put {}  around if clause with multiple statements
2006-03-31 12:40:09 +00:00
Hajimu UMEMOTO
c6ec022631 Revert `proto ip' back to the previous behavior. The kernel side of
ipfw2 doesn't allow zero as protocol number.

MFC after:	3 days
2006-03-05 15:55:46 +00:00
Julian Elischer
4f6ac14677 oops, mismerge from working sources.. not only add new code,
but remove old code!
2006-02-14 03:13:12 +00:00
Julian Elischer
21899082ae Stop ipfw from aborting when asked to delete a table entry that
doesn't exist or add one that is already present, if the -q flag
is set. Useful for "ipfw -q /dev/stdin" when the command above is
invoked from  something like python or TCL to feed commands
down the throat of ipfw.
MFC in: 1 week
2006-02-14 03:10:29 +00:00
Ruslan Ermilov
f9395aff27 Fix a markup glitch. 2006-02-03 16:41:13 +00:00
Gleb Smirnoff
7f3c5f6ac3 Forget about ipfw1 and ipfw2. We aren't in RELENG_4 anymore. 2006-01-13 16:44:56 +00:00
Gleb Smirnoff
331655f15e Document 'tablearg' keyword.
Wording by:	emaste
2006-01-13 15:48:38 +00:00
Ruslan Ermilov
a5b0d9050a [mdoc] add missing space before a punctuation type argument. 2005-12-13 17:07:52 +00:00
Gleb Smirnoff
40b1ae9e00 Add a new feature for optimizining ipfw rulesets - substitution of the
action argument with the value obtained from table lookup. The feature
is now applicable only to "pipe", "queue", "divert", "tee", "netgraph"
and "ngtee" rules.

An example usage:

  ipfw pipe 1000 config bw 1000Kbyte/s
  ipfw pipe 4000 config bw 4000Kbyte/s
  ipfw table 1 add x.x.x.x 1000
  ipfw table 1 add x.x.x.y 4000
  ipfw pipe tablearg ip from table(1) to any

In the example above the rule will throw different packets to different pipes.

TODO:
  - Support "skipto" action, but without searching all rules.
  - Improve parser, so that it warns about bad rules. These are:
    - "tablearg" argument to action, but no "table" in the rule. All
      traffic will be blocked.
    - "tablearg" argument to action, but "table" searches for entry with
      a specific value. All traffic will be blocked.
    - "tablearg" argument to action, and two "table" looks - for src and
      for dst. The last lookup will match.
2005-12-13 12:16:03 +00:00
Gleb Smirnoff
02d48226cc Cleanup _FreeBSD_version. 2005-12-09 13:03:30 +00:00
Hajimu UMEMOTO
36c263cca9 We couldn't specify the rule for filtering tunnel traffic since an
IPv6 support was committed:

- Stop treating `ip' and `ipv6' as special in `proto' option as they
  conflict with /etc/protocols.

- Disuse `ipv4' in `proto' option as it is corresponding to `ipv6'.

- When protocol is specified as numeric, treat it as it is even it is
  41 (ipv6).

- Allow zero for protocol as it is valid number of `ip'.

Still, we cannot specify an IPv6 over an IPv4 tunnel like before such
as:

	pass ipv6 from any to any

But, now, you can specify it like:

	pass ip4 from any to any proto ipv6

PR:		kern/89472
Reported by:	Ga l Roualland <gael.roualland__at__dial.oleane.com>
MFC after:	1 week
2005-11-29 15:25:09 +00:00
Gleb Smirnoff
e36ffd3b15 Catch up with ip_dummynet.h rev. 1.38 and fix build. 2005-11-29 12:01:26 +00:00
Gleb Smirnoff
b090e4ce1f Garbage-collect now unused struct _ipfw_insn_pipe and flush_pipe_ptrs(),
thus removing a few XXXes.
  Document the ABI breakage in UPDATING.
2005-11-29 08:59:41 +00:00
Ruslan Ermilov
4e9e907d63 -mdoc sweep. 2005-11-18 10:36:29 +00:00
Christian S.J. Peron
cd5f2f95b6 Restore the documentation about uid, gid or prison based rules requiring
that debug.mpsafenet be set to 0. It is still possible for dead locks to
occur while these filtering options are used due to the layering violation
inherent in their implementation.

Discussed:	-current, rwatson, glebius
2005-10-23 16:15:02 +00:00
Max Laier
13f5260916 Redirect bridge(4) to if_bridge(4) and rename sysctl accordingly.
Reminded by:	ru
2005-09-28 08:18:55 +00:00
Bjoern A. Zeeb
9066356ba1 * Add dynamic sysctl for net.inet6.ip6.fw.
* Correct handling of IPv6 Extension Headers.
* Add unreach6 code.
* Add logging for IPv6.

Submitted by:	sysctl handling derived from patch from ume needed for ip6fw
Obtained from:	is_icmp6_query and send_reject6 derived from similar
		functions of netinet6,ip6fw
Reviewed by:	ume, gnn; silence on ipfw@
Test setup provided by: CK Software GmbH
MFC after:	6 days
2005-08-13 11:02:34 +00:00
Colin Percival
e5610d524c Bump document date. Remove EOL whitespace introduced in previous
commit.  Start new line at sentence break in previous commit.

Approved by:	re (implicit, fixing a commit made 5 minutes ago)
2005-07-01 10:04:33 +00:00
Colin Percival
4beacf6666 Document some limitations of uid/gid rules.
Approved by:	re (rwatson)
MFC after:	3 days
2005-07-01 09:51:10 +00:00
Ruslan Ermilov
55c82bf0d4 Markup fixes.
Approved by:	re (blanket)
2005-06-14 11:24:56 +00:00
Max Laier
b730879ffa add_proto() now fills proto for us so stop to 'guess' the protocol from the
command and rather trust the value add_proto filled in.  While here, fix an
oversight in the pretty printing of ip6/4 options.
2005-06-07 14:11:17 +00:00
Brian Feldman
5278d40bcc Better explain, then actually implement the IPFW ALTQ-rule first-match
policy.  It may be used to provide more detailed classification of
traffic without actually having to decide its fate at the time of
classification.

MFC after:	1 week
2005-06-04 19:04:31 +00:00
Max Laier
57cd6d263b Add support for IPv4 only rules to IPFW2 now that it supports IPv6 as well.
This is the last requirement before we can retire ip6fw.

Reviewed by:	dwhite, brooks(earlier version)
Submitted by:	dwhite (manpage)
Silence from:	-ipfw
2005-06-03 01:10:28 +00:00
Max Laier
ffa4a5867a Unbreak handling of "ip[v]6" protocol and option flag. No more segfaults
and not every protocol is IPv6.
2005-05-21 03:27:33 +00:00
Gleb Smirnoff
0c0e9713a6 'ngtee' also depends on net.inet.ip.fw.one_pass. 2005-05-11 12:58:15 +00:00
Gleb Smirnoff
0af8180f8c IPFW version 2 is the only option now in HEAD. Do not confuse
users of future releases with instructions about building IPFW2
on RELENG_4.
2005-05-04 13:14:57 +00:00
Brooks Davis
d360073b23 Fix a the previous commit. I wanted to remove the if and always run the
body not remove both.

Reported by:	ceri
Pointy hat:	brooks
2005-04-26 20:22:31 +00:00
Brooks Davis
38aede1cce Don't force IPv6 proto to be printed numericaly.
Noticed by:	ceri
2005-04-26 20:00:07 +00:00
Brooks Davis
8195404bed Add IPv6 support to IPFW and Dummynet.
Submitted by:	Mariano Tortoriello and Raffaele De Lorenzo (via luigi)
2005-04-18 18:35:05 +00:00
Brooks Davis
776c10059d Be more specific when complaining about bit masks. 2005-04-05 22:26:02 +00:00
Andre Oppermann
099dd0430b Bring back the full packet destination manipulation for 'ipfw fwd'
with the kernel compile time option:

 options IPFIREWALL_FORWARD_EXTENDED

This option has to be specified in addition to IPFIRWALL_FORWARD.

With this option even packets targeted for an IP address local
to the host can be redirected.  All restrictions to ensure proper
behaviour for locally generated packets are turned off.  Firewall
rules have to be carefully crafted to make sure that things like
PMTU discovery do not break.

Document the two kernel options.

PR:		kern/71910
PR:		kern/73129
MFC after:	1 week
2005-02-22 17:40:40 +00:00
Ruslan Ermilov
0227791b40 Expand *n't contractions. 2005-02-13 22:25:33 +00:00
Gleb Smirnoff
dc490fa2e9 Sort SEE ALSO.
Submitted by:	ru
2005-02-07 08:51:34 +00:00
Gleb Smirnoff
1676543619 Document how interaction with ng_ipfw node is configured. 2005-02-05 18:29:03 +00:00
Gleb Smirnoff
670742a102 Add a ng_ipfw node, implementing a quick and simple interface between
ipfw(4) and netgraph(4) facilities.

Reviewed by:	andre, brooks, julian
2005-02-05 12:06:33 +00:00
Gleb Smirnoff
bd528823ec Don't print extra " via ", if we have already printed one. While here,
slightly style brackets.

PR:		misc/75297
MFC after:	1 week
2005-01-18 15:13:20 +00:00
Ruslan Ermilov
6087df9e8b Sort sections. 2005-01-18 10:09:38 +00:00
Ruslan Ermilov
5b1eeb71f2 Markup nits. 2005-01-15 11:21:24 +00:00
Brooks Davis
0175018610 Deprecate unmaintainable uses of strncmp to implement abbreviations.
This commit replaces those with two new functions that simplify the code
and produce warnings that the syntax is deprecated.  A small number of
sensible abbreviations may be explicitly added based on user feedback.

There were previously three types of strncmp use in ipfw:
 - Most commonly, strncmp(av, "string", sizeof(av)) was used to allow av
   to match string or any shortened form of it.  I have replaced this
   with a new function _substrcmp(av, "string") which returns 0 if av
   is a substring of "string", but emits a warning if av is not exactly
   "string".

 - The next type was two instances of strncmp(av, "by", 2) which allowed
   the abbreviation of bytes to "by", "byt", etc.  Unfortunately, it
   also supported "bykHUygh&*g&*7*ui".  I added a second new function
   _substrcmp2(av, "by", "bytes") which acts like the strncmp did, but
   complains if the user doesn't spell out the word "bytes".

 - There is also one correct use of strncmp to match "table(" which might
   have another token after it without a space.

Since I changed all the lines anyway, I also fixed the treatment of
strncmp's return as a boolean in many cases.  I also modified a few
strcmp cases as well to be fully consistent.
2005-01-15 01:46:41 +00:00
Ruslan Ermilov
214144704b Scheduled mdoc(7) sweep. 2005-01-10 16:17:34 +00:00
Brooks Davis
610055c9e2 Write some bit mask limits in hex rather than decimal so they look less
magic.
2005-01-07 01:21:23 +00:00
Christian S.J. Peron
02a85ee096 Update the IPFW man page to reflect reality. mpsafenet=0 is no longer
required when using ucred based rules.

Pointed out by:	seanc (thanks!)
MFC after:	1 month
2004-12-10 02:38:21 +00:00
Brooks Davis
448d1e830b Remove a duplicate line from an apparent merge error in rev 1.63. 2004-11-25 01:09:41 +00:00
Ceri Davies
20f13585ef Be more clear that "bridged" is a synonym for "layer2".
PR:		docs/44400
Submitted by:	Constantin Stefanov <cstef at mail dot ru>
2004-11-03 21:51:34 +00:00
Andre Oppermann
24fc79b0a4 Refuse to unload the ipdivert module unless the 'force' flag is given to kldunload.
Reflect the fact that IPDIVERT is a loadable module in the divert(4) and ipfw(8)
man pages.
2004-10-22 19:12:01 +00:00
Christian S.J. Peron
93962a3a50 Add a note to the man page warning users about possible lock order
reversals+system lock ups if they are using ucred based rules
while running with debug.mpsafenet=1.

I am working on merging a shared locking mechanism into ipfw which
should take care of this problem, but it still requires a bit more
testing and review.
2004-10-09 20:07:33 +00:00
Brian Feldman
26dc327082 Reference altq(4) instead of pf.conf(5).
Tip of the hat to:	mlaier
2004-10-08 03:31:09 +00:00
Brian Feldman
17db1a040f Commit forgotten documentation for "diverted" rules. 2004-10-08 03:24:10 +00:00
Brian Feldman
a5559720e1 Remove blindly-copied extra include path. 2004-10-03 06:32:37 +00:00
Brian Feldman
c99ee9e042 Add support to IPFW for matching by TCP data length. 2004-10-03 00:47:15 +00:00
Brian Feldman
391a0e3306 Add the documentation for IPFW's diverted(-loopback|-output) matches. 2004-10-03 00:35:52 +00:00
Brian Feldman
6daf7ebd28 Add support to IPFW for classification based on "diverted" status
(that is, input via a divert socket).
2004-10-03 00:26:35 +00:00
Brian Feldman
5599f1b52b Remove accidentally-added O_DIVERTED section. 2004-10-03 00:24:42 +00:00
Brian Feldman
974dfe3084 Add to IPFW the ability to do ALTQ classification/tagging. 2004-10-03 00:17:46 +00:00
Christian S.J. Peron
d413c2e405 Since "d" is an array of 32 bit values, it is more
correct to change the cast from unsigned int to uint32_t.

Pointed out by:	luigi
2004-09-21 22:12:43 +00:00
Ruslan Ermilov
bf899c64f3 Prepare for 5.x soon becoming -STABLE.
Pointed out by:	-current users
2004-09-19 14:30:59 +00:00
Andre Oppermann
7c0102f575 Make 'ipfw tee' behave as inteded and designed. A tee'd packet is copied
and sent to the DIVERT socket while the original packet continues with the
next rule.  Unlike a normally diverted packet no IP reassembly attemts are
made on tee'd packets and they are passed upwards totally unmodified.

Note: This will not be MFC'd to 4.x because of major infrastucture changes.

PR:		kern/64240 (and many others collapsed into that one)
2004-09-13 16:46:05 +00:00
Christian S.J. Peron
3a27af0dd4 Currently when ipfw(8) generates the micro-instructions for rules which
contain O_UID, O_GID and O_JAIL opcodes, the F_NOT or F_OR logical
operator bits get clobbered. Making it impossible to use the ``NOT'' or
``OR'' operators with uid, gid and jail based constraints.

The ipfw_insn instruction template contains a ``len'' element which
stores two pieces of information, the size of the instruction
(in 32-bit words) in the low 6 bits of "len" with the 2 remaining
bits to implement OR and NOT.

The current code clobbers the OR and NOT bits by initializing the
``len'' element to the size, rather than OR'ing the bits. This change
fixes this by changing the initialization of cmd->len to an OR operation
for the O_UID, O_GID and O_JAIL opcodes.

This may be a MFC candidate for RELENG_5.

Reviewed by:	andre
Approved by:	luigi
PR:		kern/63961 (partially)
2004-09-11 19:44:29 +00:00
Maxim Konovalov
00ed660991 o Initialize a local variable and make gcc happy.
PR:		bin/71485
Submitted by:	Jukka A. Ukkonen
2004-09-10 13:42:24 +00:00
Maxim Konovalov
9ec4f2e1b3 o Restore a historical ipfw1 logamount behaviour: rules with 'log'
keyword but without 'logamount' limit the amount of their log messages
by net.inet.ip.fw.verbose_limit sysctl value.

RELENG_5 candidate.

PR:		kern/46080
Submitted by:	Dan Pelleg
MFC after:	1 week
2004-08-29 08:25:02 +00:00
Pawel Jakub Dawidek
c3d6fe74a7 Fix 'show' command for pipes and queues.
PR:		bin/70311
Submitted by:	Pawel Malachowski <pawmal-posting@freebsd.lublin.pl>
MFC after:	3 days
2004-08-23 19:20:27 +00:00
Christian S.J. Peron
a8247db1de Remove trailing whitespace and change "prisoniD" to "prisonID".
Pointed out by:	simon
Approved by:	bmilekic (mentor)
2004-08-13 02:50:59 +00:00
Christian S.J. Peron
31c88a3043 Add the ability to associate ipfw rules with a specific prison ID.
Since the only thing truly unique about a prison is it's ID, I figured
this would be the most granular way of handling this.

This commit makes the following changes:

- Adds tokenizing and parsing for the ``jail'' command line option
  to the ipfw(8) userspace utility.
- Append the ipfw opcode list with O_JAIL.
- While Iam here, add a comment informing others that if they
  want to add additional opcodes, they should append them to the end
  of the list to avoid ABI breakage.
- Add ``fw_prid'' to the ipfw ucred cache structure.
- When initializing ucred cache, if the process is jailed,
  set fw_prid to the prison ID, otherwise set it to -1.
- Update man page to reflect these changes.

This change was a strong motivator behind the ucred caching
mechanism in ipfw.

A sample usage of this new functionality could be:

    ipfw add count ip from any to any jail 2

It should be noted that because ucred based constraints
are only implemented for TCP and UDP packets, the same
applies for jail associations.

Conceptual head nod by:	pjd
Reviewed by:	rwatson
Approved by:	bmilekic (mentor)
2004-08-12 22:06:55 +00:00
Andre Oppermann
5f9541ecbd New ipfw option "antispoof":
For incoming packets, the packet's source address is checked if it
 belongs to a directly connected network.  If the network is directly
 connected, then the interface the packet came on in is compared to
 the interface the network is connected to.  When incoming interface
 and directly connected interface are not the same, the packet does
 not match.

Usage example:

 ipfw add deny ip from any to any not antispoof in

Manpage education by:	ru
2004-08-09 16:12:10 +00:00
Andre Oppermann
55db762b76 Extend versrcreach by checking against the rt_flags for RTF_REJECT and
RTF_BLACKHOLE as well.

To quote the submitter:

 The uRPF loose-check implementation by the industry vendors, at least on Cisco
 and possibly Juniper, will fail the check if the route of the source address
 is pointed to Null0 (on Juniper, discard or reject route). What this means is,
 even if uRPF Loose-check finds the route, if the route is pointed to blackhole,
 uRPF loose-check must fail. This allows people to utilize uRPF loose-check mode
 as a pseudo-packet-firewall without using any manual filtering configuration --
 one can simply inject a IGP or BGP prefix with next-hop set to a static route
 that directs to null/discard facility. This results in uRPF Loose-check failing
 on all packets with source addresses that are within the range of the nullroute.

Submitted by:	James Jun <james@towardex.com>
2004-07-21 19:55:14 +00:00
Ruslan Ermilov
9806e23132 Mechanically kill hard sentence breaks. 2004-07-02 21:45:06 +00:00
Ruslan Ermilov
1a41a8e4ce Fixed a bug spotted by compiling with -Wall. 2004-06-10 07:51:11 +00:00
Ruslan Ermilov
cd8b5ae0ae Introduce a new feature to IPFW2: lookup tables. These are useful
for handling large sparse address sets.  Initial implementation by
Vsevolod Lobko <seva@ip.net.ua>, refined by me.

MFC after:	1 week
2004-06-09 20:10:38 +00:00
Christian S.J. Peron
04f708340a o Move NEED1 macro to the top of the source file.
o Add sanity checking to the firewall delete operation
  which tells the user that a firewall rule
  specification is required.

The previous behaviour was to exit without reporting any
errors to the user.

Approved by:	bmilekic (mentor)
2004-06-02 21:12:55 +00:00
Maxim Konovalov
5cbcfccb41 o Fix usage example.
PR:		docs/67065
Submitted by:	David Syphers
2004-05-23 19:05:59 +00:00
Stefan Farfeleder
c85c1d2779 Remove spurious semicolons.
Approved by:	das (mentor)
Reviewed by:	ipfw@
2004-05-18 13:57:37 +00:00
Christian S.J. Peron
19d4beceb2 Remove redundant sanity check before add_mac() when adding
mac ipfw rules. The exact same sanity check is performed as
the first operation of add_mac(), so there is no sense
in doing it twice.

Approved by:	bmilekic (mentor)
PR:		bin/55981
2004-05-09 01:53:31 +00:00
Andre Oppermann
22b5770b99 Add the option versrcreach to verify that a valid route to the
source address of a packet exists in the routing table.  The
default route is ignored because it would match everything and
render the check pointless.

This option is very useful for routers with a complete view of
the Internet (BGP) in the routing table to reject packets with
spoofed or unrouteable source addresses.

Example:

 ipfw add 1000 deny ip from any to any not versrcreach

also known in Cisco-speak as:

  ip verify unicast source reachable-via any

Reviewed by:	luigi
2004-04-23 14:28:38 +00:00
Maxim Konovalov
14533a98b9 o Fix an incorrect parsing of 0.0.0.0/0 expression.
PR:		kern/64778
MFC after:	6 weeks
2004-04-09 17:26:01 +00:00
Ceri Davies
a155540f4b Backout revision 1.140; it seems that the previous version is clear
enough.

Requested by:	ru
2004-03-27 14:13:53 +00:00
Maxim Konovalov
1621280872 o The lenght of the port list is limited to 30 entries in ipfw2 not to 15.
PR:		docs/64534
Submitted by:	Dmitry Cherkasov
MFC after:	1 week
2004-03-26 19:09:22 +00:00
Ceri Davies
cdfd991b87 Clarify the description of the "established" option.
PR:		docs/50391
Submitted by:	root@edcsm.jussieu.fr
MFC after:	1 week
2004-03-22 21:24:38 +00:00
Maxim Konovalov
66d217f8db o Pass a correct argument to errx(3).
PR:		bin/61846
Submitted by:	Eugene Grosbein
MFC after:	1 week
2004-01-24 19:20:09 +00:00
Mike Makonnen
c6609fcd7c grammar 2004-01-23 06:37:19 +00:00
Maxim Konovalov
3abea06d63 o -c (compact) flag is ipfw2 feature.
PR:		bin/56328
MFC after:	3 days
2004-01-15 12:59:44 +00:00
Maxim Konovalov
d06b32b094 o -f (force) in conjunction with -p (preprocessor) is ipfw2 feature.
MFC after:	3 days
2004-01-15 12:57:04 +00:00
Maxim Konovalov
cec4ab6a04 o Legitimate -f (force) flags for -p (preprocessor) case.
PR:		bin/60433
Submitted:	Bjoern A. Zeeb
MFC after:	3 weeks
2003-12-24 13:04:04 +00:00
Luigi Rizzo
ac6cec512b Add a -b flag to /sbin/ipfw to print only action and comment for each
rule, thus omitting the entire body.
This makes the output a lot more readable for complex rulesets
(provided, of course, you have annotated your ruleset appropriately!)

MFC after: 3 days
2003-12-12 16:14:28 +00:00
Sam Leffler
d559f5c3d8 Include opt_ipsec.h so IPSEC/FAST_IPSEC is defined and the appropriate
code is compiled in to support the O_IPSEC operator.  Previously no
support was included and ipsec rules were always matching.  Note that
we do not return an error when an ipsec rule is added and the kernel
does not have IPsec support compiled in; this is done intentionally
but we may want to revisit this (document this in the man page).

PR:		58899
Submitted by:	Bjoern A. Zeeb
Approved by:	re (rwatson)
2003-12-02 00:23:45 +00:00
Brooks Davis
9bf40ede4a Replace the if_name and if_unit members of struct ifnet with new members
if_xname, if_dname, and if_dunit. if_xname is the name of the interface
and if_dname/unit are the driver name and instance.

This change paves the way for interface renaming and enhanced pseudo
device creation and configuration symantics.

Approved By:	re (in principle)
Reviewed By:	njl, imp
Tested On:	i386, amd64, sparc64
Obtained From:	NetBSD (if_xname)
2003-10-31 18:32:15 +00:00
Sam Leffler
2091a3fbaf remove include of route.h now that ip_dummynet.h no longer exposes
data structures that have an embedded struct route

Sponsored by:	FreeBSD Foundation
2003-10-03 21:01:48 +00:00
Ralf S. Engelschall
d1f602f79e fix typo: s/sytem/system/ 2003-09-26 12:22:28 +00:00
Peter Pentchev
94679655fd Document the alternate way of matching MAC addresses: by a bitmask.
PR:		56021
Submitted by:	Glen Gibb <grg@ridley.unimelb.edu.au>
MFC after:	1 month
2003-09-10 06:41:16 +00:00
Thomas Moestl
884be75cce Apply a bandaid to get this working on sparc64 again; the introduction
of do_cmd() broke things, because this function assumes that a socklen_t
is large enough to hold a pointer.
A real solution to this problem would be a rewrite of do_cmd() to
treat the optlen parameter consistently and not use it to carry
a pointer or integer dependent on the context.
2003-09-04 15:57:37 +00:00
Maxim Konovalov
1c56ad9b8e Check an arguments count before proceed in sysctl_handler().
PR:		bin/56298
Submitted by:	Kang Liu <liukang@bjpu.edu.cn>
MFC after:	2 weeks

# We need a regression test suit for ipfw(2)/ipfw(8) badly.
2003-09-02 10:36:40 +00:00
Luigi Rizzo
a0e26ba089 Add a note that net.inet.ip.fw.autoinc_step is ipfw2-specific 2003-07-22 07:41:24 +00:00
Maxim Konovalov
6fa74f7d88 o Initialize do_pipe before command parsing.
PR:		bin/54649
Submitted by:	Andy Gilligan <andy@evo6.org>
MFC after:	3 days
2003-07-21 09:56:05 +00:00
Luigi Rizzo
3004afca6e Userland side of:
Allow set 31 to be used for rules other than 65535.
Set 31 is still special because rules belonging to it are not deleted
by the "ipfw flush" command, but must be deleted explicitly with
"ipfw delete set 31" or by individual rule numbers.

This implement a flexible form of "persistent rules" which you might
want to have available even after an "ipfw flush".
Note that this change does not violate POLA, because you could not
use set 31 in a ruleset before this change.

Suggested by: Paul Richards
2003-07-15 23:08:44 +00:00
Luigi Rizzo
bbc39c8391 Make sure that comments are printed at the end of a rule.
Reported by:  Patrick Tracanelli <eksffa@freebsdbrasil.com.br>
2003-07-15 10:23:43 +00:00
Luigi Rizzo
f3a126d3d8 Fix one typo in help() string, remove whitespace at end of line and
other minor whitespace changes.

Replace u_char with uint8_t in a few places.
2003-07-14 18:57:41 +00:00
Luigi Rizzo
26bf4d78c2 ccept of empty lines when reading from a file (this fixes a bug
introduced in the latest commits).

Also:

* update the 'ipfw -h' output;

* allow rules of the form "100 add allow ..." i.e. with the index first.
  (requested by Paul Richards). This was an undocumented ipfw1 behaviour,
  and it is left undocumented.

and minor code cleanups.
2003-07-14 08:39:49 +00:00
Luigi Rizzo
1b43a426de Add a '-T' flag to print the timestamp as numeric value instead
of converting it with ctime(). This is a lot more convenient for
postprocessing.

Submitted by: "Jacob S. Barrett" <jbarrett@amduat.net>
2003-07-12 08:35:25 +00:00