lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 13 Apr 2022 16:00:46 -0600
From:   David Ahern <>
To:     Eric Dumazet <>,
        Arun Ajith S <>,
Subject: Re: [PATCH net-next v3] net/ipv6: Introduce accept_unsolicited_na
 knob to implement router-side changes for RFC9131

On 4/13/22 3:22 PM, Eric Dumazet wrote:
> On 4/13/22 07:34, Arun Ajith S wrote:
>> Add a new neighbour cache entry in STALE state for routers on receiving
>> an unsolicited (gratuitous) neighbour advertisement with
>> target link-layer-address option specified.
>> This is similar to the arp_accept configuration for IPv4.
>> A new sysctl endpoint is created to turn on this behaviour:
>> /proc/sys/net/ipv6/conf/interface/accept_unsolicited_na.
> Do we really need to expose this to /proc/sys, for every interface added
> in the host ?
> /proc files creations/deletion cost a lot in environments
> adding/deleting netns very often.

agree with the general intent (along with the increasing memory costs).
I do think this case should be done as a /proc/sys entry for consistency
with both ARP and existing related NA settings.

> I would prefer using NETLINK attributes, a single recvmsg() syscall can
> fetch/set hundreds of them.

What do you have in mind here? A link attribute managed through `ip link

Powered by blists - more mailing lists