Commit Graph

488 Commits

Author SHA1 Message Date
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