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| author | Guido Falsi <madpilot@FreeBSD.org> | 2025-09-20 12:26:41 +0000 |
|---|---|---|
| committer | Guido Falsi <madpilot@FreeBSD.org> | 2025-09-20 12:31:44 +0000 |
| commit | 31ec8b6407fdd5a87d70265762457c67ce618283 (patch) | |
| tree | 6a491295a0ca12b8bcb32c645a9294ba5d51e324 /contrib/llvm-project/compiler-rt/lib/profile/InstrProfilingMergeFile.c | |
| parent | 174d5d9397c492aff67f7ad49e130039697dc1dd (diff) | |
Implement RFC 7217 (A Method for Generating Semantically Opaque
Interface Identifiers with IPv6 Stateless Address Autoconfiguration
(SLAAC)) in our IPv6 stack.
A new ifconfig `stableaddr` flag is added to enable the feature on
interfaces, which defaults to on or off for new interfaces based
on the sysctl `net.inet6.ip6.use_stableaddr` (off by default, so
this commit causes no change in behavior with default settings).
The algorithm follows the RFC in its logic, using SHA256-HMAC as
the algorithm to derive addresses so as to provide code that can
be leveraged by future implentations of RFC 8981, leveraging the
`hostuuid` as the secret.
The source of the hostidentifier can be configured using the sysctl
`net.inet6.ip6.stableaddr_netifsource`, while the number of retries
generating a new address in case of collision can be configured
using the `net.inet6.ip6.stableaddr_maxretries` sysctl (default 3).
Documentation about all these flags is added to the ifconfig(8) man
page.
Reviewed by: cognet, glebius, hrs
Tested by: zarychtam@plan-b.pwste.edu.pl
Approved by: cognet, glebius
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D49681
Diffstat (limited to 'contrib/llvm-project/compiler-rt/lib/profile/InstrProfilingMergeFile.c')
0 files changed, 0 insertions, 0 deletions