Date: Wed, 14 Jun 2023 10:40:43 +0000 From: Benoit Chesneau <benoitc@enki-multimedia.eu> To: Alexander Chernikov <melifaro@FreeBSD.org> Cc: "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org> Subject: Re: can't add a /24 blackhole route with a /32 loopback Message-ID: <JwbosyfjgGLW90NQ4X4eGBlw3R733HYvveuYsRZMfc20rcyRoMzssroz2yxwIkYw6qsSErVlFUlQzUYl4MQg3DigK03FlyUGzLB3yVMBRS4=@enki-multimedia.eu> In-Reply-To: <785732C7-A6B2-4039-A9E2-6AC3DCD97618@FreeBSD.org> References: <9Jh8lSg93tjEc0-UEU3MQkGuQc7R9Aht0NBt4kEr6-wtgMdf673nws_jGaHelYwz0U78ik2BM4WLUca2JZAjrX-WSbP5QS4rsvoBHZo_JZo=@enki-multimedia.eu> <4DF565CC-D8AE-4F35-A7CF-7ED5AAD27B49@FreeBSD.org> <t_gT66nRcCT4fte7HbEMcM6J2spH-rEGFNYtZqX0GsUlxW4R5_pEVx3ZqtAwphKT4UBZsGZKX9gxeym1SKdc5GmceXGy1rRYEnSU1X6-_8c=@enki-multimedia.eu> <sgx1BljfJfV-Bn0PlfJ0va7yWHE9QraHpTjPBB6jlJWq4aehFwihem8C8f3ikkjvdEGIYY15S3ppTkQpWDfR3LDi_IKewBg7XQ1v9_u3SC4=@enki-multimedia.eu> <5747CC08-6903-4E2F-B0A5-D0CAB08F8165@FreeBSD.org> <0C23EFD2-1535-46B0-9E69-93D58B376CC3@FreeBSD.org> <U2t98l4c8iB0VFmMFD9ET2Qd-xAeybUqjfNmvBPjEA5OBWiSpLdBRT9Ci6GHqryyLo8JJVnV4rMqNFvWiOKv-_6DkeVcpOTmf6c7HRAA-Qk=@enki-multimedia.eu> <WjecIjlFU9R_pRXbSj-GUxyI_O45IsDQg8tVTLo9E4BdyMUAzjSYsKtaBpewzCCv9JjWkWDkIYaW3Qm9ge3Jd10hyO-pckdRri5dWoPM7uU=@enki-multimedia.eu> <785732C7-A6B2-4039-A9E2-6AC3DCD97618@FreeBSD.org>
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------- Original Message ------- On Wednesday, June 14th, 2023 at 12:36, Alexander Chernikov <melifaro@FreeBSD.org> wrote: > > On 14 Jun 2023, at 11:26, Benoit Chesneau benoitc@enki-multimedia.eu wrote: > > > > I found an interresting log in dmesg (see below). Not sure how it can happens. > > > > Could it be related to the usage of bird? > > > > The log: > > > > `[rtsock] fill_blackholeinfo: PID 72835: Unable to find ifa for blackhole/reject nhop [rtsock] fill_blackholeinfo: PID 72837: Unable to find ifa for blackhole/reject nhop [rtsock] fill_blackholeinfo: PID 72838: Unable to find ifa for blackhole/reject nhop [rtsock] fill_blackholeinfo: PID 72847: Unable to find ifa for blackhole/reject nhop [rtsock] fill_blackholeinfo: PID 72854: Unable to find ifa for blackhole/reject nhop [rtsock] fill_blackholeinfo: PID 72860: Unable to find ifa for blackhole/reject nhop` > > Not sure if that’s bird (it shouldn’t be the case), but that’s the reason. > Every route requires some preferred source interface address by convention, as the stack wants to see some non-NULL value. > For the blackhole routes, this source address is the first address from lo0 interface. > In your case, `lo0` doesn’t contain any IPv4 addresses (typically there should be 127.0.0.1 there). > Is there any reason for not having 127.0.0.1 ? > oh! good catch. When localhost added it works, indeed... Thanks! There ws no reason the localhost was not set. I am not sure why it has been not set. I will investigate. Benoît
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