git: c0563fd5fc32 - stable/13 - netinet: Define IPv6 ECN mask
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Date: Thu, 11 Jan 2024 14:35:19 UTC
The branch stable/13 has been updated by markj:
URL: https://cgit.FreeBSD.org/src/commit/?id=c0563fd5fc322bc9948c5402cb28641fec53931c
commit c0563fd5fc322bc9948c5402cb28641fec53931c
Author: Jose Luis Duran <jlduran@gmail.com>
AuthorDate: 2023-10-28 02:50:18 +0000
Commit: Mark Johnston <markj@FreeBSD.org>
CommitDate: 2024-01-11 14:33:05 +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.
Reviewed by: imp, markj
MFC after: 1 week
Pull Request: https://github.com/freebsd/freebsd-src/pull/879
(cherry picked from commit b0e13f785b336670bdf39b83a78435b00d00f43c)
---
sys/netinet/ip6.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sys/netinet/ip6.h b/sys/netinet/ip6.h
index faa6fc290ca1..37d2c1777c32 100644
--- a/sys/netinet/ip6.h
+++ b/sys/netinet/ip6.h
@@ -97,10 +97,12 @@ 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