Date: Mon, 15 Jan 2024 12:13:46 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: Mark Johnston <markj@FreeBSD.org> Cc: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: Re: git: b0e13f785b33 - main - netinet: Define IPv6 ECN mask Message-ID: <6o0q4p2s-qsp0-qs68-95q5-p67o7rn07070@SerrOFQ.bet> In-Reply-To: <202401031832.403IWu1A018909@gitrepo.freebsd.org> References: <202401031832.403IWu1A018909@gitrepo.freebsd.org>
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On Wed, 3 Jan 2024, Mark Johnston wrote: > The branch main has been updated by markj: > > URL: https://cgit.FreeBSD.org/src/commit/?id=b0e13f785b336670bdf39b83a78435b00d00f43c > > commit b0e13f785b336670bdf39b83a78435b00d00f43c > Author: Jose Luis Duran <jlduran@gmail.com> > AuthorDate: 2023-10-28 02:50:18 +0000 > Commit: Mark Johnston <markj@FreeBSD.org> > CommitDate: 2024-01-03 17:56:28 +0000 > > netinet: Define IPv6 ECN mask > > 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. I would really appreciate if these (supposedly excepts) came with a reference to an RFC (ideally with section). > Reviewed by: imp, markj > MFC after: 1 week > Pull Request: https://github.com/freebsd/freebsd-src/pull/879 > --- > sys/netinet/ip6.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/sys/netinet/ip6.h b/sys/netinet/ip6.h > index 9807e6a1780a..2f61d594e59d 100644 > --- a/sys/netinet/ip6.h > +++ b/sys/netinet/ip6.h > @@ -95,10 +95,12 @@ struct ip6_hdr { > #if BYTE_ORDER == BIG_ENDIAN > #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */ > #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */ > +#define IPV6_ECN_MASK 0x00300000 /* ECN code point (2 bits) */ > #else > #if BYTE_ORDER == LITTLE_ENDIAN > #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */ > #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */ > +#define IPV6_ECN_MASK 0x00003000 /* ECN code point (2 bits) */ > #endif /* LITTLE_ENDIAN */ > #endif > #define IPV6_FLOWLABEL_LEN 20 > -- Bjoern A. Zeeb r15:7
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