Date: Tue, 18 Feb 2025 03:40:43 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 284872] [carp] Missing byte order correction causing certain unicast announcements to have invalid destination MAC address Message-ID: <bug-284872-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D284872 Bug ID: 284872 Summary: [carp] Missing byte order correction causing certain unicast announcements to have invalid destination MAC address Product: Base System Version: 14.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: brett.merrick@itcollective.nz sys/netinet/ip_carp.c - line 1248: if (IN_MULTICAST(sc->sc_carpaddr.s_addr)) m->m_flags |=3D M_MCAST;=20 Should read: if (IN_MULTICAST(ntohl(sc->sc_carpaddr.s_addr))) m->m_flags |=3D M_MCAST;=20 At present, any announcement where the peer IP address ends in .244-.239 ra= ther than begins with 244.-239. get sent to an invalid multicast destination MAC address. eg. Frame 17: 70 bytes on wire (560 bits), 70 bytes captured (560 bits) Ethernet II, Src: Microsoft_de:ed:00 (00:15:5d:de:ed:00), Dst: IPv4mcast_28:c9:ef (01:00:5e:28:c9:ef) Internet Protocol Version 4, Src: 192.168.201.238, Dst: 192.168.201.239 Common Address Redundancy Protocol --=20 You are receiving this mail because: You are the assignee for the bug.=
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