netdev - Re: [PATCH net-next] ipv6: sysctl to restrict candidate source addresses

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Message-ID: <CAAedzxqC3jeezcSnmM+PYJYT+oVFr6kZ1mX_xBFmMrsGFTH6VQ@mail.gmail.com>
Date:	Mon, 6 Jul 2015 12:06:33 +0900
From:	Erik Kline <ek@...gle.com>
To:	YOSHIFUJI Hideaki <hideaki.yoshifuji@...aclelinux.com>
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Lorenzo Colitti <lorenzo@...gle.com>,
	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next] ipv6: sysctl to restrict candidate source addresses

Reworked with "use_oif_addr".

Thanks,
-Erik

On 3 July 2015 at 16:03, YOSHIFUJI Hideaki
<hideaki.yoshifuji@...aclelinux.com> wrote:
> Hi,
>
> Erik Kline wrote:
>> Per RFC 6724, section 4, "Candidate Source Addresses":
>>
>>     It is RECOMMENDED that the candidate source addresses be the set
>>     of unicast addresses assigned to the interface that will be used
>>     to send to the destination (the "outgoing" interface).
>>
>> Add a sysctl to enable this behaviour.
>>
>> Signed-off-by: Erik Kline <ek@...gle.com>
>> ---
>>  Documentation/networking/ip-sysctl.txt | 12 ++++++++++++
>>  include/linux/ipv6.h                   |  1 +
>>  include/uapi/linux/ipv6.h              |  1 +
>>  net/ipv6/addrconf.c                    | 30 +++++++++++++++++++++++++-----
>>  4 files changed, 39 insertions(+), 5 deletions(-)
>>
>> diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
>> index 5fae770..d8f3e60 100644
>> --- a/Documentation/networking/ip-sysctl.txt
>> +++ b/Documentation/networking/ip-sysctl.txt
>> @@ -1435,6 +1435,18 @@ mtu - INTEGER
>>       Default Maximum Transfer Unit
>>       Default: 1280 (IPv6 required minimum)
>>
>> +restrict_srcaddr - INTEGER
>> +     Restrict candidate source addresses (vis. RFC 6724, section 4).
>> +
>> +     When set to 1, the candidate source addresses for destinations
>> +     routed via this interface are restricted to the set of addresses
>> +     configured on this interface.
>> +
>> +     Possible values are:
>> +             0 : no source address restrictions
>> +             1 : require matching outgoing interface
>> +     Default:  0
>> +
>
> I cannot get what "restrict" restricts.  How about "use_oif_addr" or
> something like that (like use_tempaddr)?
>
> --
> Hideaki Yoshifuji <hideaki.yoshifuji@...aclelinux.com>
> Technical Division, MIRACLE LINUX CORPORATION
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