Date: Wed, 31 Aug 2022 11:09:56 +0100 From: "Alexander V. Chernikov" <melifaro@ipfw.ru> To: Martin Stiemerling <mls.ietf@gmail.com> Cc: Peter Jeremy <peterj@freebsd.org>, "net@freebsd.org" <net@freebsd.org> Subject: Re: Notification of change of IP address/Routing etc Message-ID: <260F641E-8D90-42B0-87C0-E7F62BAAB481@ipfw.ru> In-Reply-To: <431B2046-B986-441D-97E8-BA7EDF0420A4@gmail.com> References: <67E19935-B868-4BFB-A9FF-9CD9A5547343@gmail.com> <Yw8jE0nVBqVYOR7M@server.rulingia.com> <431B2046-B986-441D-97E8-BA7EDF0420A4@gmail.com>
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> On 31 Aug 2022, at 10:11, Martin Stiemerling <mls.ietf@gmail.com> = wrote: >=20 > Hi,=20 >=20 >> Am 31.08.2022 um 11:00 schrieb Peter Jeremy <peterj@freebsd.org>: >>=20 >> On 2022-Aug-31 10:18:44 +0200, Martin Stiemerling = <mls.ietf@gmail.com> wrote: >>> I am looking for a mechanism to get a notification from the OS when, = for instance, an IP address on an interface or a routing entry is being = changed.=20 >>=20 >> Assuming you are using the base OS version of dhclient, you could use >> /etc/dhclient-exit-hooks, which is a shellscript documented in >> dhclient-script(8). >=20 > Thanks, but that won=E2=80=99t help, as I need notifications about all = changes, even if the change is not happening thru dhcp. E.g., IPv6 = changes or manual changes.=20 >=20 > This is for a gnmi-target, i.e., net management via yang/gnmi, under = development for Linux and FreeBSD for routers, firewalls, software = switches etc: > https://code.fbi.h-da.de/danet/gnmi-target >=20 > I have seen that there is a project for adding netlink to FreeBSD14: = https://github.com/pengnam/freebsd-netlink >=20 > Right now, I haven=E2=80=99t found a way, devd is for device changes = only, to get this done.=20 For now, you can use routing socket notifications (route(4)). "route -n monitor=E2=80=9D provide a quick way to check what=E2=80=99s = available at the moment. There are some plans to have netlink in 14 and 13 but the timeframe is = not settled yet. >=20 > I am happy to help to change this, but it is unclear to me where and = how to start.=20 >=20 > Thanks, >=20 > Martin=20 >=20 >=20 >=20 >=20
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