src/sys/netinet/ip6.h, branch main

ip6: Remove support for RFC2675 (Jumbo Payload Option)

2026-01-27T13:20:33Z

The Jumbo Payload option was intended to allow the deployment of IPv6 on networks with a link MTU in excess of 65,735 octets. Speaking to one of the authors of RFC2675 the networks which motivated the Jumbo Payload option no longer exist. FreeBSD does not currently support any links with this capacity and discussion when this change was first proposed suggested that the loop back interface had to be patched to test implementation. As there are no known devices that can carry Jumbo Payloads remove support. Reviewed by: glebius, teuxen, kp Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19960

netinet: Define IPv6 ECN mask

2024-01-03T17:56:28Z

Define a mask for the code point used for ECN in the Traffic Class field (2 bits) of an IPv6 header. BE: 0 0 3 0 0 0 0 0 Bit: 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Version| Traffic Class | Flow Label | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ... | For BE (Big Endian), or network-byte order, this corresponds to 0x00300000. For Little Endian, it corresponds to 0x00003000. Reviewed by: imp, markj MFC after: 1 week Pull Request: https://github.com/freebsd/freebsd-src/pull/879

sys: Remove ancient SCCS tags.

2023-11-27T05:23:30Z

Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix

sys: Remove $FreeBSD$: one-line .c comment pattern

2023-08-16T17:54:24Z

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

netinet6: make IPv6 fragment TTL per-VNET configurable.

2023-06-01T12:04:49Z

Having it configurable adds more flexibility, especially for the systems with low amount of memory. Additionally, it allows to speedup frag6/ tests execution. Reviewed by: kp, markj, bz Differential Revision: https://reviews.freebsd.org/D35755 MFC after: 2 weeks

tcp: use IPV6_FLOWLABEL_LEN

2023-04-11T16:53:51Z

Avoid magic numbers when handling the IPv6 flow ID for DSCP and ECN fields and use the named variable instead. Reviewed By: tuexen, #transport Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D39503

net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros

2021-03-04T19:56:48Z

Introduce convenience macros to retrieve the DSCP, ECN or traffic class bits from an IPv6 header. Use them where appropriate. Reviewed by: ae (previous version), rscheff, tuexen, rgrimes MFC after: 2 weeks Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D29056

Remove stale definitions. The removed definitions are not used right

2020-03-01T12:34:27Z

now and are incompatible with the correct ones in RFC 3168. Submitted by: Richard Scheffenegger Differential Revision: https://reviews.freebsd.org/D23903

Remove now unused IPv6 macros and update docs.

2019-11-15T21:55:41Z

After r354748-354750 all uses of the IP6_EXTHDR_CHECK() and IP6_EXTHDR_GET() macros are gone from the kernel. IP6_EXTHDR_GET0() was unused. Remove the macros and update the documentation. Sponsored by: Netflix

carp: Set DSCP value CS7

2018-07-01T08:37:07Z

Update carp to set DSCP value CS7(Network Traffic) in the flowlabel field of packets by default. Currently carp only sets TOS_LOWDELAY in IPv4 which was deprecated in 1998. This also implements sysctl that can revert carp back to it's old behavior if desired. This will allow implementation of QOS on modern network devices to make sure carp packets aren't dropped during interface contention. Submitted by: Nick Wolff Reviewed by: kp, mav (earlier version) Differential Revision: https://reviews.freebsd.org/D14536