From mboxrd@z Thu Jan 1 00:00:00 1970 From: "van der Linden, Frank" Subject: Re: [PATCH v2] tcp: verify the checksum of the first data segment in a new connection Date: Tue, 12 Jun 2018 21:53:17 +0000 Message-ID: References: <5b203e1b.vy4yU6CwMEwLmNtj%fllinden@amazon.com> <9541859a-1346-e13a-b97c-a2a63f3b19f4@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 To: Eric Dumazet , "edumazet@google.com" , "netdev@vger.kernel.org" Return-path: Received: from smtp-fw-9101.amazon.com ([207.171.184.25]:18830 "EHLO smtp-fw-9101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933793AbeFLVxV (ORCPT ); Tue, 12 Jun 2018 17:53:21 -0400 In-Reply-To: <9541859a-1346-e13a-b97c-a2a63f3b19f4@gmail.com> Content-Language: en-US Content-ID: <0A28E61EC623B044BD3C713D5087DBB6@amazon.com> Sender: netdev-owner@vger.kernel.org List-ID: VGhlIGNvbnZlbnRpb24gc2VlbXMgdG8gYmUgdG8gY2FsbCB0Y3BfY2hlY2tzdW1fY29tcGxldGUg YWZ0ZXIgdGNwX2ZpbHRlciBoYXMgYSBjaGFuY2UgdG8gZGVhbCB3aXRoIHRoZSBwYWNrZXQuIEkg d2FudGVkIHRvIHByZXNlcnZlIHRoYXQuDQoNCklmIHRoYXQgaXMgbm90IGEgY29uY2VybiwgdGhl biBJIGFncmVlIHRoYXQgdGhpcyBpcyBhIGZhciBiZXR0ZXIgd2F5IHRvIGdvLg0KDQpGcmFuaw0K DQrvu79PbiA2LzEyLzE4LCAyOjUwIFBNLCAiRXJpYyBEdW1hemV0IiA8ZXJpYy5kdW1hemV0QGdt YWlsLmNvbT4gd3JvdGU6DQoNCiAgICANCiAgICANCiAgICBPbiAwNi8xMi8yMDE4IDAyOjQxIFBN LCBGcmFuayB2YW4gZGVyIExpbmRlbiB3cm90ZToNCiAgICA+IGNvbW1pdCAwNzkwOTZmMTAzZmEg KCJ0Y3AvZGNjcDogaW5zdGFsbCBzeW5fcmVjdiByZXF1ZXN0cyBpbnRvIGVoYXNoDQogICAgPiB0 YWJsZSIpIGludHJvZHVjZWQgYW4gb3B0aW1pemF0aW9uIGZvciB0aGUgaGFuZGxpbmcgb2YgY2hp bGQgc29ja2V0cw0KICAgID4gY3JlYXRlZCBmb3IgYSBuZXcgVENQIGNvbm5lY3Rpb24uDQogICAg PiANCiAgICA+IEJ1dCB0aGlzIG9wdGltaXphdGlvbiBwYXNzZXMgYW55IGRhdGEgYXNzb2NpYXRl ZCB3aXRoIHRoZSBsYXN0IEFDSyBvZiB0aGUNCiAgICA+IGNvbm5lY3Rpb24gaGFuZHNoYWtlIHVw IHRoZSBzdGFjayB3aXRob3V0IHZlcmlmeWluZyBpdHMgY2hlY2tzdW0sIGJlY2F1c2UgaXQNCiAg ICA+IGNhbGxzIHRjcF9jaGlsZF9wcm9jZXNzKCksIHdoaWNoIGluIHR1cm4gY2FsbHMgdGNwX3Jj dl9zdGF0ZV9wcm9jZXNzKCkNCiAgICA+IGRpcmVjdGx5LiAgVGhlc2UgbG93ZXItbGV2ZWwgcHJv Y2Vzc2luZyBmdW5jdGlvbnMgZG8gbm90IGRvIGFueSBjaGVja3N1bQ0KICAgID4gdmVyaWZpY2F0 aW9uLg0KICAgID4gDQogICAgPiBJbnNlcnQgYSB0Y3BfY2hlY2tzdW1fY29tcGxldGUgY2FsbCBp biB0aGUgVENQX05FV19TWU5fUkVDRUlWRSBwYXRoIHRvDQogICAgPiBmaXggdGhpcy4NCiAgICA+ IA0KICAgID4gU2lnbmVkLW9mZi1ieTogRnJhbmsgdmFuIGRlciBMaW5kZW4gPGZsbGluZGVuQGFt YXpvbi5jb20+DQogICAgDQogICAgDQogICAgVGhpcyBpcyB3YXkgdG9vIGNvbXBsaWNhdGVkLg0K ICAgIA0KICAgIFlvdSBzaG91bGQgY2FsbCB0Y3BfY2hlY2tzdW1fY29tcGxldGUoKSBlYXJsaWVy IGFuZCBhdm9pZCBhbGwgdGhpcyBtZXNzLg0KICAgIA0KICAgIA0KICAgIElQVjQgcGFydCBzaG93 biBoZXJlIDoNCiAgICANCiAgICBkaWZmIC0tZ2l0IGEvbmV0L2lwdjQvdGNwX2lwdjQuYyBiL25l dC9pcHY0L3RjcF9pcHY0LmMNCiAgICBpbmRleCBmZWQzZjFjNjYxNjcwODk5N2Y2MjE1MzVlZmU5 NDEyZTRhZmEwYTUwLi43YjVmMzJhYTM4MzViMDEyNGIwYTliZDM0MmMzNzFkZjdiNDZmNDcxIDEw MDY0NA0KICAgIC0tLSBhL25ldC9pcHY0L3RjcF9pcHY0LmMNCiAgICArKysgYi9uZXQvaXB2NC90 Y3BfaXB2NC5jDQogICAgQEAgLTE3MzAsNiArMTczMCwxMCBAQCBpbnQgdGNwX3Y0X3JjdihzdHJ1 Y3Qgc2tfYnVmZiAqc2tiKQ0KICAgICAgICAgICAgICAgICAgICAgICAgICAgIHJlcXNrX3B1dChy ZXEpOw0KICAgICAgICAgICAgICAgICAgICAgICAgICAgIGdvdG8gZGlzY2FyZF9pdDsNCiAgICAg ICAgICAgICAgICAgICAgfQ0KICAgICsgICAgICAgICAgICAgICBpZiAodW5saWtlbHkodGNwX2No ZWNrc3VtX2NvbXBsZXRlKHNrYikpKSB7DQogICAgKyAgICAgICAgICAgICAgICAgICAgICAgcmVx c2tfcHV0KHJlcSk7DQogICAgKyAgICAgICAgICAgICAgICAgICAgICAgZ290byBjc3VtX2Vycm9y Ow0KICAgICsgICAgICAgICAgICAgICB9DQogICAgICAgICAgICAgICAgICAgIGlmICh1bmxpa2Vs eShzay0+c2tfc3RhdGUgIT0gVENQX0xJU1RFTikpIHsNCiAgICAgICAgICAgICAgICAgICAgICAg ICAgICBpbmV0X2Nza19yZXFza19xdWV1ZV9kcm9wX2FuZF9wdXQoc2ssIHJlcSk7DQogICAgICAg ICAgICAgICAgICAgICAgICAgICAgZ290byBsb29rdXA7DQogICAgDQogICAgDQogICAgDQogICAg DQoNCg==