From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755318AbYJHKlu (ORCPT ); Wed, 8 Oct 2008 06:41:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753795AbYJHKlm (ORCPT ); Wed, 8 Oct 2008 06:41:42 -0400 Received: from web30101.mail.mud.yahoo.com ([209.191.69.33]:35574 "HELO web30101.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753783AbYJHKlm (ORCPT ); Wed, 8 Oct 2008 06:41:42 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Message-ID; b=nd/xUCsH7ykirdDUzo3WGfu6sf4+pCMJ5g9RTB684K7TUCqUb5ivLNceSQB8qxW8FZfoZdtZFCrBzJh/Jbj4Quay8+8hCgfCkZFYDdwWtbDXqxJwdpHBMLw56PRnhRAgHShn+Weowtw2y0kArBMHvhuBG/QxTR8uk++GV1qnNjw=; X-YMail-OSG: pA7uBMEVM1nLUBUCbCGIUTedVc2_j4mmxsuqDESSC1u420kZtYVjEPkf4oAvSkkq0iC.2xQPV8J7rV5_kj44mpp.xdLskrfDX4Msc_6BhoeoJ0ijRxZ3.if3WLkYLZm8XTYxH5PmMucw.sebbix7IhUvjaxFc_i7CDNdLsUV X-Mailer: YahooMailWebService/0.7.247.3 Date: Wed, 8 Oct 2008 03:41:41 -0700 (PDT) From: Parav Pandit Reply-To: paravpandit@yahoo.com Subject: sending TCP/IP packet based on NIC MTU size To: Linux kernel MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-ID: <513565.4838.qm@web30101.mail.mud.yahoo.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I am searching Linux kernel TCP/IP code which does following functionality. TCP/IP stack needs to check that - how many bytes of a TCP stream it can send to NIC driver. Can anybody point me where this check in performed? Like if MTU size is set to 1500 for a NIC and VLAN is not set then it will send 1492 bytes. If VLAN is set then it will send 1398 bytes to NIC. Regards, Parav Pandit