- Add libnpf(3) - a library to control NPF (configuration, ruleset, etc).
- Add NPF support for ftp-proxy(8).
- Add rc.d script for NPF.
- Convert npfctl(8) to use libnpf(3) and thus make it less depressive.
Note: next clean-up step should be a parser, once dholland@ will finish it.
- Add more documentation.
- Various fixes.
- Add the concept of rule procedure: separate normalization, logging and
potentially other functions from the rule structure. Rule procedure can be
shared amongst the rules. Separation is both at kernel level (npf_rproc_t)
and configuration ("procedure" + "apply").
- Fix portmap sharing for NAT policy.
- Update TCP state tracking logic. Use TCP FSM definitions.
- Add if_byindex(), OK by matt@. Use in logging for the lookup.
- Fix traceroute ALG and many other bugs; misc clean-up.
- Add support for session saving/restoring.
- Add packet logging support (can tcpdump a pseudo-interface).
- Support reload without flushing of sessions; rework some locking.
- Revisit session mangement, replace linking with npf_sentry_t entries.
- Add some counters for statistics, using percpu(9).
- Add IP_DF flag cleansing.
- Fix various bugs; misc clean-up.
by zero while validating the bpf program.
originally spotted by skrll@, and broke atf the month-old atf test for
this exact problem: net_bpf_t_div-by-zero_div_by_zero.
- Add proper TCP state tracking as described in Guido van Rooij paper,
plus handle TCP Window Scaling option.
- Completely rework npf_cache_t, reduce granularity, simplify code.
- Add npf_addr_t as an abstraction, amend session handling code, as well
as NAT code et al, to use it. Now design is prepared for IPv6 support.
- Handle IPv4 fragments i.e. perform packet reassembly.
- Add support for IPv4 ID randomization and minimum TTL enforcement.
- Add support for TCP MSS "clamping".
- Random bits for IPv6. Various fixes and clean-up.
1. Fix inverted node order, so that negative value from comparison operator
would represent lower (left) node, and positive - higher (right) node.
2. Add an argument (i.e. "context"), passed to comparison operators.
3. Change rb_tree_insert_node() to return a node - either inserted one or
already existing one.
4. Amend the interface to manipulate the actual object, instead of the
rb_node (in a similar way as Patricia-tree interface does).
5. Update all RB-tree users accordingly.
XXX: Perhaps rename rb.h to rbtree.h, since cleaning-up..
1-3 address the PR/43488 by Jeremy Huddleston.
Passes RB-tree regression tests.
Reviewed by: matt@, christos@
- Add support for bi-directional NAT and redirection / port forwarding.
- Finish filtering on ICMP type/code and add filtering on TCP flags.
- Add support for TCP reset (RST) or ICMP destination unreachable on block.
- Fix a bunch of bugs; misc cleanup.
hosts. IPv6 is probably still broken, and, actually, the lookup table
for mask values should be kept in network byte order, not host byte order
and the corresponding change to the srtconfig ioctl interface made.
But at least this works.
1) RFC2367 says in 2.3.3 Address Extension: "All non-address
information in the sockaddrs, such as sin_zero for AF_INET sockaddrs,
and sin6_flowinfo for AF_INET6 sockaddrs, MUST be zeroed out."
the IPSEC_NAT_T code was expecting the port information it needs
to be conveyed in the sockaddr instead of exclusively by
SADB_X_EXT_NAT_T_SPORT and SADB_X_EXT_NAT_T_DPORT,
and was not zeroing out the port information in the non-nat-traversal
case.
Since it was expecting the port information to reside in the sockaddr
it could get away with (re)setting the ports after starting to use them.
-> Set the natt ports before setting the SA mature.
2) RFC3947 has two Original Address fields, initiator and responder,
so we need SADB_X_EXT_NAT_T_OAI and SADB_X_EXT_NAT_T_OAR and not just
SADB_X_EXT_NAT_T_OA
The change has been created using vanhu's patch for FreeBSD as reference.
Note that establishing actual nat-t sessions has not yet been tested.
Likely fixes the following:
PR bin/41757
PR net/42592
PR net/42606
- Designed to be fully MP-safe and highly efficient.
- Tables/IP sets (hash or red-black tree) for high performance lookups.
- Stateful filtering and Network Address Port Translation (NAPT).
Framework for application level gateways (ALGs).
- Packet inspection engine called n-code processor - inspired by BPF -
supporting generic RISC-like and specific CISC-like instructions for
common patterns (e.g. IPv4 address matching). See npf_ncode(9) manual.
- Convenient userland utility npfctl(8) with npf.conf(8).
NOTE: This is not yet a fully capable alternative to PF or IPFilter.
Further work (support for binat/rdr, return-rst/return-icmp, common ALGs,
state saving/restoring, logging, etc) is in progress.
Thanks a lot to Matt Thomas for various useful comments and code review.
Aye by: board@
cegger