Date: Mon, 19 Jul 2021 20:55:37 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 257286] gateway with `ping -6 -e` is ignored Message-ID: <bug-257286-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D257286 Bug ID: 257286 Summary: gateway with `ping -6 -e` is ignored Product: Base System Version: 13.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jcaplan@blackberry.com Created attachment 226555 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D226555&action= =3Dedit proposed patch Overview -------- Specifying a gateway with `ping -6 -e` is ignored. Steps to Reproduce ------------------ Two devices D1 and D2 D1: ifconfig vmx0 inet6 3ffe::1 ifconfig vmx1 inet6 2001::1 D2: ifconfig vmx0 inet6 3ffe::2 ifconfig vmx1 inet6 2001::2 Then on D1: ping -6 -e 3ffe::2 -c3 2001::2 Actual Results: --------------- The icmp6 message goes out from D1 on vmx1 Expected Results ---------------- The icmp6 message goes out from D1 on vmx0 Build Date & Hardware --------------------- FreeBSD freebsd 13.0-RELEASE FreeBSD 13.0-RELEASE #6 releng/13.0-n244733-ea31abc261f: Sat Jun 19 06:23:53 UTC 2021 Additional Information ---------------------- See attached patch. Control flow has changed quite a bit in ip6_output() since 12.2. In this scenario, we have ro =3D=3D NULL and hit the else block to determin= e the outgoing interface based on the destination ip. When ping6 uses the IPV6_NEXTHOP option, then opt->ip6po_nextroute.ro_nh is defined. However, w= hen we hit the old check later on, nh =3D=3D NULL so it is ignored and we never= get a chance to check for a hard coded next hop. Instead, when ro =3D=3D NULL, need to check the option and hard code the destination prior to calling fib6_lookup() which will assign the interface. --=20 You are receiving this mail because: You are the assignee for the bug.=
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