src-test2/sys/netinet6/ipsec.h, branch stable/5

MFC: /*- and related license changes

2005-01-31T23:27:04Z

nuke unused functions.

2004-02-16T17:02:44Z

Submitted by: "Bjoern A. Zeeb"

Initial import of RFC 2385 (TCP-MD5) digest support.

2004-02-11T04:26:04Z

This is the first of two commits; bringing in the kernel support first. This can be enabled by compiling a kernel with options TCP_SIGNATURE and FAST_IPSEC. For the uninitiated, this is a TCP option which provides for a means of authenticating TCP sessions which came into being before IPSEC. It is still relevant today, however, as it is used by many commercial router vendors, particularly with BGP, and as such has become a requirement for interconnect at many major Internet points of presence. Several parts of the TCP and IP headers, including the segment payload, are digested with MD5, including a shared secret. The PF_KEY interface is used to manage the secrets using security associations in the SADB. There is a limitation here in that as there is no way to map a TCP flow per-port back to an SPI without polluting tcpcb or using the SPD; the code to do the latter is unstable at this time. Therefore this code only supports per-host keying granularity. Whilst FAST_IPSEC is mutually exclusive with KAME IPSEC (and thus IPv6), TCP_SIGNATURE applies only to IPv4. For the vast majority of prospective users of this feature, this will not pose any problem. This implementation is output-only; that is, the option is honoured when responding to a host initiating a TCP session, but no effort is made [yet] to authenticate inbound traffic. This is, however, sufficient to interwork with Cisco equipment. Tested with a Cisco 2501 running IOS 12.0(27), and Quagga 0.96.4 with local patches. Patches for tcpdump to validate TCP-MD5 sessions are also available from me upon request. Sponsored by: sentex.net

pass pcb rather than so. it is expected that per socket policy

2004-02-03T18:20:55Z

works again.

nuke obsoleted ipsec_gethist(). it just did panic to notify user

2003-11-07T20:38:45Z

that it was obsoleted. it is better to fail than just hiding use of ipsec_gethist() at build. Sugessted by: "Bjoern A. Zeeb"

- cleanup SP refcnt issue.

2003-11-04T16:02:05Z

- share policy-on-socket for listening socket. - don't copy policy-on-socket at all. secpolicy no longer contain spidx, which saves a lot of memory. - deep-copy pcb policy if it is an ipsec policy. assign ID field to all SPD entries. make it possible for racoon to grab SPD entry on pcb. - fixed the order of searching SA table for packets. - fixed to get a security association header. a mode is always needed to compare them. - fixed that the incorrect time was set to sadb_comb_{hard|soft}_usetime. - disallow port spec for tunnel mode policy (as we don't reassemble). - an user can define a policy-id. - clear enc/auth key before freeing. - fixed that the kernel crashed when key_spdacquire() was called because key_spdacquire() had been implemented imcopletely. - preparation for 64bit sequence number. - maintain ordered list of SA, based on SA id. - cleanup secasvar management; refcnt is key.c responsibility; alloc/free is keydb.c responsibility. - cleanup, avoid double-loop. - use hash for spi-based lookup. - mark persistent SP "persistent". XXX in theory refcnt should do the right thing, however, we have "spdflush" which would touch all SPs. another solution would be to de-register persistent SPs from sptree. - u_short -> u_int16_t - reduce kernel stack usage by auto variable secasindex. - clarify function name confusion. ipsec_*_policy -> ipsec_*_pcbpolicy. - avoid variable name confusion. (struct inpcbpolicy *)pcb_sp, spp (struct secpolicy **), sp (struct secpolicy *) - count number of ipsec encapsulations on ipsec4_output, so that we can tell ip_output() how to handle the packet further. - When the value of the ul_proto is ICMP or ICMPV6, the port field in "src" of the spidx specifies ICMP type, and the port field in "dst" of the spidx specifies ICMP code. - avoid from applying IPsec transport mode to the packets when the kernel forwards the packets. Tested by: nork Obtained from: KAME

- fix typo in comments.

2003-10-08T18:26:08Z

- style. - NULL is not 0. - some variables were renamed. - nuke unused logic. (there is no functional change.) Obtained from: KAME

Add a TCP TIMEWAIT state which uses less space than a fullblown TCP

2003-02-19T22:32:43Z

control block. Allow the socket and tcpcb structures to be freed earlier than inpcb. Update code to understand an inp w/o a socket. Reviewed by: hsu, silby, jayanth Sponsored by: DARPA, NAI Labs

Replace aux mbufs with packet tags:

2002-10-16T01:54:46Z

o instead of a list of mbufs use a list of m_tag structures a la openbsd o for netgraph et. al. extend the stock openbsd m_tag to include a 32-bit ABI/module number cookie o for openbsd compatibility define a well-known cookie MTAG_ABI_COMPAT and use this in defining openbsd-compatible m_tag_find and m_tag_get routines o rewrite KAME use of aux mbufs in terms of packet tags o eliminate the most heavily used aux mbufs by adding an additional struct inpcb parameter to ip_output and ip6_output to allow the IPsec code to locate the security policy to apply to outbound packets o bump __FreeBSD_version so code can be conditionalized o fixup ipfilter's call to ip_output based on __FreeBSD_version Reviewed by: julian, luigi (silent), -arch, -net, darren Approved by: julian, silence from everyone else Obtained from: openbsd (mostly) MFC after: 1 month

just merged cosmetic changes from KAME to ease sync between KAME and FreeBSD.

2002-04-19T04:46:24Z

(based on freebsd4-snap-20020128) Reviewed by: ume MFC after: 1 week