From: Leonard Crestez <cdleonard@gmail.com>
To: David Ahern <dsahern@gmail.com>, Francesco Ruggeri <fruggeri@arista.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>,
David Ahern <dsahern@kernel.org>, Shuah Khan <shuah@kernel.org>,
Eric Dumazet <edumazet@google.com>,
"David S. Miller" <davem@davemloft.net>,
Herbert Xu <herbert@gondor.apana.org.au>,
Kuniyuki Iwashima <kuniyu@amazon.co.jp>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Jakub Kicinski <kuba@kernel.org>,
Yuchung Cheng <ycheng@google.com>,
Mat Martineau <mathew.j.martineau@linux.intel.com>,
Christoph Paasch <cpaasch@apple.com>,
Ivan Delalande <colona@arista.com>,
Priyaranjan Jha <priyarjha@google.com>,
netdev <netdev@vger.kernel.org>,
linux-crypto@vger.kernel.org, linux-kselftest@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 00/19] tcp: Initial support for RFC5925 auth option
Date: Sat, 25 Sep 2021 17:21:14 +0300 [thread overview]
Message-ID: <b6c15f48-b6d1-e656-c796-9e7e63e646b3@gmail.com> (raw)
In-Reply-To: <e5b191ed-881e-542c-40e1-0cefdbfb2f10@gmail.com>
On 9/25/21 4:35 AM, David Ahern wrote:
> On 9/23/21 1:38 AM, Leonard Crestez wrote:
>> On 9/22/21 11:23 PM, Francesco Ruggeri wrote:
>>> On Tue, Sep 21, 2021 at 9:15 AM Leonard Crestez <cdleonard@gmail.com>
>>> wrote:
>>>> * Sequence Number Extension not implemented so connections will flap
>>>> every ~4G of traffic.
>>>
>>> Could you expand on this?
>>> What exactly do you mean by flap? Will the connection be terminated?
>>> I assume that depending on the initial sequence numbers the first flaps
>>> may occur well before 4G.
>>> Do you use a SNE of 0 in the hash computation, or do you just not include
>>> the SNE in it?
>>
>> SNE is hardcoded to zero, with the logical consequence of incorrect
>> signatures on sequence number wrapping. The SNE has to be included
>> because otherwise all signatures would be invalid.
>>
>> You are correct that this can break much sooner than 4G of traffic, but
>> still in the GB range on average. I didn't test the exact behavior (not
>> clear how) but if signatures don't validate the connection will likely
>> timeout.
>>
>
> This is for BGP and LDP connections. What's the expected frequency of
> rollover for large FIBs? Seems like it could be fairly often.
Implementing SNE is obviously required for standard conformance, I'm not
claiming it is not needed. I will include this in a future version.
I skipped it because it has very few interactions with the rest of the
code so it can be implemented separately. Many tests can pass just fine
ignoring SNE.
--
Regards,
Leonard
prev parent reply other threads:[~2021-09-25 14:21 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-21 16:14 [PATCH 00/19] tcp: Initial support for RFC5925 auth option Leonard Crestez
2021-09-21 16:14 ` [PATCH 01/19] tcp: authopt: Initial support and key management Leonard Crestez
2021-09-21 16:14 ` [PATCH 02/19] docs: Add user documentation for tcp_authopt Leonard Crestez
2021-09-21 16:14 ` [PATCH 03/19] selftests: Initial tcp_authopt test module Leonard Crestez
2021-09-21 16:14 ` [PATCH 04/19] selftests: tcp_authopt: Initial sockopt manipulation Leonard Crestez
2021-09-21 16:14 ` [PATCH 05/19] tcp: authopt: Add crypto initialization Leonard Crestez
2021-09-21 16:14 ` [PATCH 06/19] tcp: authopt: Compute packet signatures Leonard Crestez
2021-09-21 16:14 ` [PATCH 07/19] tcp: authopt: Hook into tcp core Leonard Crestez
2021-09-21 16:14 ` [PATCH 08/19] tcp: authopt: Disable via sysctl by default Leonard Crestez
2021-09-25 1:57 ` David Ahern
2021-09-25 14:14 ` Leonard Crestez
2021-09-21 16:14 ` [PATCH 09/19] selftests: tcp_authopt: Test key address binding Leonard Crestez
2021-09-21 16:14 ` [PATCH 10/19] tcp: ipv6: Add AO signing for tcp_v6_send_response Leonard Crestez
2021-09-21 16:14 ` [PATCH 11/19] tcp: authopt: Add support for signing skb-less replies Leonard Crestez
2021-09-21 16:14 ` [PATCH 12/19] tcp: ipv4: Add AO signing for " Leonard Crestez
2021-09-21 16:14 ` [PATCH 13/19] selftests: tcp_authopt: Add scapy-based packet signing code Leonard Crestez
2021-09-21 16:14 ` [PATCH 14/19] selftests: tcp_authopt: Add packet-level tests Leonard Crestez
2021-09-21 16:14 ` [PATCH 15/19] selftests: Initial tcp_authopt support for nettest Leonard Crestez
2021-09-21 16:14 ` [PATCH 16/19] selftests: Initial tcp_authopt support for fcnal-test Leonard Crestez
2021-09-21 16:15 ` [PATCH 17/19] selftests: Add -t tcp_authopt option for fcnal-test.sh Leonard Crestez
2021-09-25 1:52 ` David Ahern
2021-09-25 14:38 ` Leonard Crestez
2021-09-21 16:15 ` [PATCH 18/19] tcp: authopt: Add key selection controls Leonard Crestez
2021-09-21 16:15 ` [PATCH 19/19] selftests: tcp_authopt: Add tests for rollover Leonard Crestez
2021-09-21 23:13 ` [PATCH 00/19] tcp: Initial support for RFC5925 auth option Jakub Kicinski
2021-09-23 7:49 ` Leonard Crestez
2021-09-23 13:58 ` Jakub Kicinski
2021-09-25 14:25 ` Leonard Crestez
2021-09-22 20:23 ` Francesco Ruggeri
2021-09-23 7:38 ` Leonard Crestez
2021-09-25 1:35 ` David Ahern
2021-09-25 14:21 ` Leonard Crestez [this message]
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