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[155.97.234.108]) by smtp.gmail.com with ESMTPSA id c1sm19363908pfb.135.2019.09.03.09.06.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Sep 2019 09:06:04 -0700 (PDT) Subject: Re: [PATCH] Clock-independent TCP ISN generation To: Eric Dumazet , davem@davemloft.net Cc: shiraz.saleem@intel.com, jgg@ziepe.ca, arnd@arndb.de, netdev@vger.kernel.org, sirus@cs.utah.edu References: <70c41960-6d14-3943-31ca-75598ad3d2d7@gmail.com> <2cbd5a8f-f120-a7df-83a3-923f33ca0a10@gmail.com> From: Cyrus Sh Openpgp: preference=signencrypt Autocrypt: addr=sirus.shahini@gmail.com; prefer-encrypt=mutual; keydata= mQENBFeVDCUBCADQxg44Jls52jg8sAvXE2CC8BKZBXxjI2SbHtWkYdchayCiOOhSn7P+aW8F OEiI6qJD8/jcq5F7xQv4LZSm5KRG7RbHhfk2ZgB/yM9GksXS4lZdzu+mR1YoIc9/rtgLQ+bv mIfbXSyI0zidQ3mpZAmfIxLg8aNNAbW6AIafCwmUS847cK3vadzu1Jc5j3VLFATkh4eb0HXR tbwtqqvLLKqXBfre4sMysUFK/0bcF4FtGBw89iMD9CpXKtTF+UmJ8Ir7/eK4qUIPMvCCvpcO wH38xP1biWKzknmK0NDgDmUOVAgPB82puYJHZwGLHB2K1Wl+kBR0td1LrOP7+XCMUELjABEB AAG0IkN5cnVzLlNoIDxzaXJ1cy5zaGFoaW5pQGdtYWlsLmNvbT6JATgEEwECACIFAleVDCUC GwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJELUzPfwK/ZGvHn4H/iSfPYufKTwJU9DD ynx5/HsyMOGh5JKXyDu84WE3+8jlNXKNCpPAHylvCE1CgIF6d4W60Zy7sSgOep3svKSdo9A0 qbajUttEv2xSuv4il+8Z3QcdVnHw11IoQxj/ayxsctPDDYvk/7vPmVXMZEnpIbDw/nPzR+Jt axa/xWOp8kufOSc7DdP2OiRTXLqddCM6uWqL/ckvmvBB58BP4QYedUEZxxaMj3/ErzEGEjUY tke796IU8HWcc/venQfPEEuHgNsfgbXtUiKu4UBAhVmXwCRgrUodd+9ZJlqYOY56e9y6bLjj gw3Ls8Du7SsRP/apFwnbQMbLpxiPOSUWYngNGOK5AQ0EV5UMJQEIAMLFZAP8zwnD8Q/smVtJ 8ltJn1w1gNuUTEQvIzGTYVTW1E5LqZZB+RLte+UH+uZ04ii2/Qm+//xk23gq+4wQvlX8Vpxj gEyaZl2QibaUWDzh+1w4XcLHs9su37kSQoBljm86fk4qgnyTDxTa4sUACZzj+dT6tvxM+yYg WM2rglpFQ2d4boAa0/ScEXOVhPKV7D8jVSerK8Jb1jDjG3zovS8h6+Sv3II50K2Fwg+qLz6r KQRcxqM7FTBrurug8HGpYXwUs96ZtkOvdBr0Rll9ibi/3ksNbVJVJqKixIHxHwoddfDqS3Xc t1F0spHPkZK1FB5Kj7gvlFq8Fd8N7S2tescAEQEAAYkBHwQYAQIACQUCV5UMJQIbDAAKCRC1 Mz38Cv2Rr6ZXB/9M3Er23Hu5/aHHceCTwPbQIsM1GzQ7vCzzb7+L908tjlc5mj1S7wNyBg+J XhaK3N1QYgc4ZEQiY91h3lAgiAw1fghDK9CEEcVV9RgakfLbhfMsQQj0TnhZ/afSAD84h8gZ K0Ilqi1XNb0quwm3lGE8SJqbM3yFV5ArMFG5QZN7O+TK+uC9Ruj3kV6hqV4LXaNJ4lug76yx tPbu9w6p2nOJ8d2Gv5T6K0uSoUCfplZa0hmX8ZZBYSQZLrEk0KrlorH0GZfvr1Rv2gXa6/Ne I9Sdj0Bd/WQRUnr8l6HlVPHA/diIFwSzo5taOqx62QXI1RbSozDjJ7QoR/gTilEDF18C Message-ID: Date: Tue, 3 Sep 2019 10:06:03 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <2cbd5a8f-f120-a7df-83a3-923f33ca0a10@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 9/3/19 9:59 AM, Eric Dumazet wrote: > > You could add a random delay to all SYN packets, if you believe your host has clock skews. In theory yes, but again do you know any practical example with tested applications and the list of the rules? I'm interested to see an actual example that somebody has carried out and observed its results.