* Add cidr:kfib algo type just for fun. It binds kernel fib
of given number to a table.

Example:
# ipfw table fib2 create algo "cidr:kfib fib=2"
# ipfw table fib2 info
+++ table(fib2), set(0) +++
k

* Add cidr:kfib algo type just for fun. It binds kernel fib
of given number to a table.

Example:
# ipfw table fib2 create algo "cidr:kfib fib=2"
# ipfw table fib2 info
+++ table(fib2), set(0) +++
kindex: 2, type: cidr, locked
valtype: number, references: 0
algorithm: cidr:kfib fib=2
items: 11, size: 288
# ipfw table fib2 list
+++ table(fib2), set(0) +++
10.0.0.0/24 0
127.0.0.1/32 0
::/96 0
::1/128 0
::ffff:0.0.0.0/96 0
2a02:978:2::/112 0
fe80::/10 0
fe80:1::/64 0
fe80:2::/64 0
fe80:3::/64 0
ff02::/16 0
# ipfw table fib2 lookup 10.0.0.5
10.0.0.0/24 0
# ipfw table fib2 lookup 2a02:978:2::11
2a02:978:2::/112 0
# ipfw table fib2 detail
+++ table(fib2), set(0) +++
kindex: 2, type: cidr, locked
valtype: number, references: 0
algorithm: cidr:kfib fib=2
items: 11, size: 288
IPv4 algorithm radix info
items: 0 itemsize: 200
IPv6 algorithm radix info
items: 0 itemsize: 200

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* Document internal commands.
* Do not require/set default table type if algo name is specified.
* Add TA_FLAG_READONLY option for algorithms.

* Rename ipfw_[un]bind_table_rule to ipfw_[un]ref_rule_tables
* Update their descriptions.

* Rename has_space to need_modify to be consistent with 0 as return values.
* document all callbacks supported by algorithms code.

* Add support for batched add/delete for ipfw tables
* Add support for atomic batches add (all or none).
* Fix panic on deleting non-existing entry in radix algo.

Examples:

# si is empty
# ipfw tab

* Add support for batched add/delete for ipfw tables
* Add support for atomic batches add (all or none).
* Fix panic on deleting non-existing entry in radix algo.

Examples:

# si is empty
# ipfw table si add 1.1.1.1/32 1111 2.2.2.2/32 2222
added: 1.1.1.1/32 1111
added: 2.2.2.2/32 2222
# ipfw table si add 2.2.2.2/32 2200 4.4.4.4/32 4444
exists: 2.2.2.2/32 2200
added: 4.4.4.4/32 4444
ipfw: Adding record failed: record already exists
^^^^^ Returns error but keeps inserted items
# ipfw table si list
+++ table(si), set(0) +++
1.1.1.1/32 1111
2.2.2.2/32 2222
4.4.4.4/32 4444
# ipfw table si atomic add 3.3.3.3/32 3333 4.4.4.4/32 4400 5.5.5.5/32 5555
added(reverted): 3.3.3.3/32 3333
exists: 4.4.4.4/32 4400
ignored: 5.5.5.5/32 5555
ipfw: Adding record failed: record already exists
^^^^^ Returns error and reverts added records
# ipfw table si list
+++ table(si), set(0) +++
1.1.1.1/32 1111
2.2.2.2/32 2222
4.4.4.4/32 4444

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* Use 2 32-bits field inside rule instead of 2 pointer to save skipto state.
* Introduce ipfw_reap_add() to unify unlinking rules/adding it to reap queue
* Unbreak FreeBSD7 export format.

* Add IP_FW_TABLE_XMODIFY opcode
* Since there seems to be lack of consensus on strict value typing,
remove non-default value types. Use userland-only "value format type"
to print values.

Kernel

* Add IP_FW_TABLE_XMODIFY opcode
* Since there seems to be lack of consensus on strict value typing,
remove non-default value types. Use userland-only "value format type"
to print values.

Kernel changes:
* Add IP_FW_XMODIFY to permit table run-time modifications.
Currently we support changing limit and value format type.

Userland changes:
* Support IP_FW_XMODIFY opcode.
* Support specifying value format type (ftype) in tablble create/modify req
* Fine-print value type/value format type.

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Remove IP_FW_TABLES_XGETSIZE opcode.
It is superseded by IP_FW_TABLES_XLIST.

Kernel changes:
* Implement proper checks for switching between global and set-aware tables
* Split IP_FW_DEL mess into the following opcodes:
* IP_FW_XDEL (del rules matching pattern)
* IP_FW_XM

Kernel changes:
* Implement proper checks for switching between global and set-aware tables
* Split IP_FW_DEL mess into the following opcodes:
* IP_FW_XDEL (del rules matching pattern)
* IP_FW_XMOVE (move rules matching pattern to another set)
* IP_FW_SET_SWAP (swap between 2 sets)
* IP_FW_SET_MOVE (move one set to another one)
* IP_FW_SET_ENABLE (enable/disable sets)
* Add IP_FW_XZERO / IP_FW_XRESETLOG to finish IP_FW3 migration.
* Use unified ipfw_range_tlv as range description for all of the above.
* Check dynamic states IFF there was non-zero number of deleted dyn rules,
* Del relevant dynamic states with singe traversal instead of per-rule one.

Userland changes:
* Switch ipfw(8) to use new opcodes.

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Implement atomic ipfw table swap.

Kernel changes:
* Add opcode IP_FW_TABLE_XSWAP
* Add support for swapping 2 tables with the same type/ftype/vtype.
* Make skipto cache init after ipfw locks init.

Implement atomic ipfw table swap.

Kernel changes:
* Add opcode IP_FW_TABLE_XSWAP
* Add support for swapping 2 tables with the same type/ftype/vtype.
* Make skipto cache init after ipfw locks init.

Userland changes:
* Add "table X swap Y" command.

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Show algorithm-specific data in "table info" output.

Remove unneded headers.

* Fix case when returning more that 4096 bytes of data
* Use different approach to ensure algo has enough space to store N elements:
- explicitly ask algo (under UH_WLOCK) before/after insertion.

* Fix case when returning more that 4096 bytes of data
* Use different approach to ensure algo has enough space to store N elements:
- explicitly ask algo (under UH_WLOCK) before/after insertion. This (along
with existing reallocation callbacks) really guarantees us that it is safe
to insert N elements at once while holding UH_WLOCK+WLOCK.
- remove old aflags/flags approach

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* Permit limiting number of items in table.

Kernel changes:
* Add TEI_FLAGS_DONTADD entry flag to indicate that insert is not possible
* Support given flag in all algorithms
* Add "limit" field to i

* Permit limiting number of items in table.

Kernel changes:
* Add TEI_FLAGS_DONTADD entry flag to indicate that insert is not possible
* Support given flag in all algorithms
* Add "limit" field to ipfw_xtable_info
* Add actual limiting code into add_table_entry()

Userland changes:
* Add "limit" option as "create" table sub-option. Limit modification
is currently impossible.
* Print human-readable errors in table enry addition/deletion code.

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* Use TA_FLAG_DEFAULT for default algorithm selection instead of
exporting algorithm structures directly.

* Pass needed state buffer size in algo structures as preparation
for tables add/del req

* Use TA_FLAG_DEFAULT for default algorithm selection instead of
exporting algorithm structures directly.

* Pass needed state buffer size in algo structures as preparation
for tables add/del requests batching.

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* Add new "flow" table type to support N=1..5-tuple lookups
* Add "flow:hash" algorithm

Kernel changes:
* Add O_IP_FLOW_LOOKUP opcode to support "flow" lookups
* Add IPFW_TABLE_FLOW table type
* Add

* Add new "flow" table type to support N=1..5-tuple lookups
* Add "flow:hash" algorithm

Kernel changes:
* Add O_IP_FLOW_LOOKUP opcode to support "flow" lookups
* Add IPFW_TABLE_FLOW table type
* Add "struct tflow_entry" as strage for 6-tuple flows
* Add "flow:hash" algorithm. Basically it is auto-growing chained hash table.
Additionally, we store mask of fields we need to compare in each instance/

* Increase ipfw_obj_tentry size by adding struct tflow_entry
* Add per-algorithm stat (ifpw_ta_tinfo) to ipfw_xtable_info
* Increase algoname length: 32 -> 64 (algo options passed there as string)
* Assume every table type can be customized by flags, use u8 to store "tflags" field.
* Simplify ipfw_find_table_entry() by providing @tentry directly to algo callback.
* Fix bug in cidr:chash resize procedure.

Userland changes:
* add "flow table(NAME)" syntax to support n-tuple checking tables.
* make fill_flags() separate function to ease working with _s_x arrays
* change "table info" output to reflect longer "type" fields

Syntax:
ipfw table fl2 create type flow:[src-ip][,proto][,src-port][,dst-ip][dst-port] [algo flow:hash]

Examples:

0:02 [2] zfscurr0# ipfw table fl2 create type flow:src-ip,proto,dst-port algo flow:hash
0:02 [2] zfscurr0# ipfw table fl2 info
+++ table(fl2), set(0) +++
kindex: 0, type: flow:src-ip,proto,dst-port
valtype: number, references: 0
algorithm: flow:hash
items: 0, size: 280
0:02 [2] zfscurr0# ipfw table fl2 add 2a02:6b8::333,tcp,443 45000
0:02 [2] zfscurr0# ipfw table fl2 add 10.0.0.92,tcp,80 22000
0:02 [2] zfscurr0# ipfw table fl2 list
+++ table(fl2), set(0) +++
2a02:6b8::333,6,443 45000
10.0.0.92,6,80 22000
0:02 [2] zfscurr0# ipfw add 200 count tcp from me to 78.46.89.105 80 flow 'table(fl2)'
00200 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2)
0:03 [2] zfscurr0# ipfw show
00200 0 0 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2)
65535 617 59416 allow ip from any to any
0:03 [2] zfscurr0# telnet -s 10.0.0.92 78.46.89.105 80
Trying 78.46.89.105...
..
0:04 [2] zfscurr0# ipfw show
00200 5 272 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2)
65535 682 66733 allow ip from any to any

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* Dump available table algorithms via "ipfw talist" cmd.

Kernel changes:
* Add type/refcount fields to table algo instances.
* Add IP_FW_TABLES_ALIST opcode to export available algorihms to userland

* Dump available table algorithms via "ipfw talist" cmd.

Kernel changes:
* Add type/refcount fields to table algo instances.
* Add IP_FW_TABLES_ALIST opcode to export available algorihms to userland.

Userland changes:
* Fix cores on empty input inside "ipfw table" handler.
* Add "ipfw talist" cmd to print availabled kernel algorithms.
* Change "table info" output to reflect long algorithm config lines.

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* Copy ta structures to stable storage to ease future extension.
* Remove algo .lookup field since table lookup function is set by algo code.

* Add new ipfw cidr algorihm: hash table.
Algorithm works with both IPv4 and IPv6 prefixes, /32 and /128
ranges are assumed by default.
It works the following way: input IP address is masked to speci

* Add new ipfw cidr algorihm: hash table.
Algorithm works with both IPv4 and IPv6 prefixes, /32 and /128
ranges are assumed by default.
It works the following way: input IP address is masked to specified
mask, hashed and searched inside hash bucket.

Current implementation does not support "lookup" method and hash auto-resize.
This will be changed soon.

some examples:

ipfw table mi_test2 create type cidr algo cidr:hash
ipfw table mi_test create type cidr algo "cidr:hash masks=/30,/64"

ipfw table mi_test2 info
+++ table(mi_test2), set(0) +++
type: cidr, kindex: 7
valtype: number, references: 0
algorithm: cidr:hash
items: 0, size: 220

ipfw table mi_test info
+++ table(mi_test), set(0) +++
type: cidr, kindex: 6
valtype: number, references: 0
algorithm: cidr:hash masks=/30,/64
items: 0, size: 220

ipfw table mi_test add 10.0.0.5/30
ipfw table mi_test add 10.0.0.8/30
ipfw table mi_test add 2a02:6b8:b010::1/64 25

ipfw table mi_test list
+++ table(mi_test), set(0) +++
10.0.0.4/30 0
10.0.0.8/30 0
2a02:6b8:b010::/64 25

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* Change algorthm names to "type:algo" (e.g. "iface:array", "cidr:radix") format.
* Pass number of items changed in add/del hooks to permit adding/deleting
multiple values at once.

* Add generic ipfw interface tracking API
* Rewrite interface tables to use interface indexes

Kernel changes:
* Add generic interface tracking API:
- ipfw_iface_ref (must call unlocked, performs la

* Add generic ipfw interface tracking API
* Rewrite interface tables to use interface indexes

Kernel changes:
* Add generic interface tracking API:
- ipfw_iface_ref (must call unlocked, performs lazy init if needed, allocates
state & bumps ref)
- ipfw_iface_add_ntfy(UH_WLOCK+WLOCK, links comsumer & runs its callback to
update ifindex)
- ipfw_iface_del_ntfy(UH_WLOCK+WLOCK, unlinks consumer)
- ipfw_iface_unref(unlocked, drops reference)
Additionally, consumer callbacks are called in interface withdrawal/departure.

* Rewrite interface tables to use iface tracking API. Currently tables are
implemented the following way:
runtime data is stored as sorted array of {ifidx, val} for existing interfaces
full data is stored inside namedobj instance (chained hashed table).

* Add IP_FW_XIFLIST opcode to dump status of tracked interfaces

* Pass @chain ptr to most non-locked algorithm callbacks:
(prepare_add, prepare_del, flush_entry ..). This may be needed for better
interaction of given algorithm an other ipfw subsystems

* Add optional "change_ti" algorithm handler to permit updating of
cached table_info pointer (happens in case of table_max resize)

* Fix small bug in ipfw_list_tables()
* Add badd (insert into sorted array) and bdel (remove from sorted array) funcs

Userland changes:
* Add "iflist" cmd to print status of currently tracked interface
* Add stringnum_cmp for better interface/table names sorting

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* Require explicit table creation before use on kernel side.
* Add resize callbacks for upcoming table-based algorithms.

Kernel changes:
* s/ipfw_modify_table/ipfw_manage_table_ent/
* Simplify add_t

* Require explicit table creation before use on kernel side.
* Add resize callbacks for upcoming table-based algorithms.

Kernel changes:
* s/ipfw_modify_table/ipfw_manage_table_ent/
* Simplify add_table_entry(): make table creation a separate piece of code.
Do not perform creation if not in "compat" mode.
* Add ability to perform modification of algorithm state (like table resize).
The following callbacks were added:
- prepare_mod (allocate new state, without locks)
- fill_mod (UH_WLOCK, copy old state to new one)
- modify (UH_WLOCK + WLOCK, switch state)
- flush_mod (no locks, flushes allocated data)
Given callbacks are called if table modification has been requested by add or
delete callbacks. Additional u64 tc->'flags' field was added to pass these
requests.
* Change add/del table ent format: permit adding/removing multiple entries
at once (only 1 supported at the moment).

Userland changes:
* Auto-create tables with warning

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* Use different rule structures in kernel/userland.
* Switch kernel to use per-cpu counters for rules.
* Keep ABI/API.

Kernel changes:
* Each rules is now exported as TLV with optional extenable
c

* Use different rule structures in kernel/userland.
* Switch kernel to use per-cpu counters for rules.
* Keep ABI/API.

Kernel changes:
* Each rules is now exported as TLV with optional extenable
counter block (ip_fW_bcounter for base one) and
ip_fw_rule for rule&cmd data.
* Counters needs to be explicitly requested by IPFW_CFG_GET_COUNTERS flag.
* Separate counters from rules in kernel and clean up ip_fw a bit.
* Pack each rule in IPFW_TLV_RULE_ENT tlv to ease parsing.
* Introduce versioning in container TLV (may be needed in future).
* Fix ipfw_cfg_lheader broken u64 alignment.

Userland changes:
* Use set_mask from cfg header when requesting config
* Fix incorrect read accouting in ipfw_show_config()
* Use IPFW_RULE_NOOPT flag instead of playing with _pad
* Fix "ipfw -d list": do not print counters for dynamic states
* Some small fixes

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* Add "lookup" table functionality to permit userland entry lookups.
* Bump table dump format preserving old ABI.

Kernel size:
* Add IP_FW_TABLE_XFIND to handle "lookup" request from userland.
* Add

* Add "lookup" table functionality to permit userland entry lookups.
* Bump table dump format preserving old ABI.

Kernel size:
* Add IP_FW_TABLE_XFIND to handle "lookup" request from userland.
* Add ta_find_tentry() algorithm callbacks/handlers to support lookups.
* Fully switch to ipfw_obj_tentry for various table dumps:
algorithms are now required to support the latest (ipfw_obj_tentry) entry
dump format, the rest is handled by generic dump code.
IP_FW_TABLE_XLIST opcode version bumped (0 -> 1).
* Eliminate legacy ta_dump_entry algo handler:
dump_table_entry() converts data from current to legacy format.

Userland side:
* Add "lookup" table parameter.
* Change the way table type is guessed: call table_get_info() first,
and check value for IPv4/IPv6 type IFF table does not exist.
* Fix table_get_list(): do more tries if supplied buffer is not enough.
* Sparate table_show_entry() from table_show_list().

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* Issue warning while requesting ruleset with new tables via legacy binary.
Convert each unresolved table as table 65535 (which cannot be used normally).
* Perform s/^ipfw_// for add_table_entry, d

* Issue warning while requesting ruleset with new tables via legacy binary.
Convert each unresolved table as table 65535 (which cannot be used normally).
* Perform s/^ipfw_// for add_table_entry, del_table_entry and flush_table since
these are internal functions exported to keep legacy interface.
* Remove macro TABLE_SET. Operations with tables can be done in any set, the only
thing net.inet.ip.fw.tables_sets affects is the set in which tables are looked
up while binding them to the rule.

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