From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A84BC4727C for ; Tue, 29 Sep 2020 13:50:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD287207C4 for ; Tue, 29 Sep 2020 13:50:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="S9mj+8ve" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730376AbgI2Nu4 (ORCPT ); Tue, 29 Sep 2020 09:50:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729351AbgI2Nu4 (ORCPT ); Tue, 29 Sep 2020 09:50:56 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22346C061755; Tue, 29 Sep 2020 06:50:56 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id 7so3918392pgm.11; Tue, 29 Sep 2020 06:50:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=+wk7LoqYbQetQmR+hUJz4dTqK7qk9HGpsFOcpBKxn78=; b=S9mj+8ve0KZHeSRdDA4NmfnitNx12B6I2bf5xAelUSUVnZEcbbryncmGxAcMXelZmM K0ESMhAb+m05Yg71qQ9mWI/IGr3YQ2+wTvBAqvyK2BumgzXJyM/iexEKtsXVTqwOupJX uw6GJqpOrMwZwBzTli7u3vn7gUyyUNIigVqB0B27S61oL87iPCxDvOdBjkJdWXLFtzMh weXc38YF3eZah/KqIormfppwsyygnC+ZpAB4L8JyIy0Jq30lgkki/Vrruukg0bmUmr6M wuhr+vpHzrPP/v6QoHT59srfUkshZuSRLpEkELKgf1se9L0TlNlOZrBVbgDMTnp5X3wf PX7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=+wk7LoqYbQetQmR+hUJz4dTqK7qk9HGpsFOcpBKxn78=; b=ojJt2mGt37OTKhBE1QKKphy4+WgijwHJlAoscsmmqJRVZ/aW7WjiwSMdUYI4SFajwN UurMrePvPlxC5qLknNPhHTbC3WOKe5N7b3dJxzFmqcZQ/je2q/rSusnlE0vq+R3fNIQL V5B0jX88npFdc1DRPj1DwDWM75gfrvmcjreJ62xUuVYiqWtoPN3yFvnIBx8iq++FWvUa KFQIWLdNbvIaacm2zoxwK5VWWjWaNry5BO/iwjNqtcGLFD2Lbv6tBdokUrXqrYQD47H9 tMNoErFFZr2zqmZCbIaHPT31QwAtwFVy9EMWtbzRMJlSn+UpniY5MQnH69Lsw8nn2wMO AAoQ== X-Gm-Message-State: AOAM533R/GJNjHoN2xvL2oklEyACNAC68fNGkEsZn787XDCnXlj3PBbT bnUvPClVZmFxWlOecwb6/X0eK9P/Kb8= X-Google-Smtp-Source: ABdhPJxs7ybb4B1o5EMBKQvlHqrX8y2UYiCCZtFM/TeDqGWhMTydajK+pClFXZwOhV6xXW2HaPrSiQ== X-Received: by 2002:a17:902:c40d:b029:d2:93e8:1f4b with SMTP id k13-20020a170902c40db02900d293e81f4bmr3529034plk.29.1601387455211; Tue, 29 Sep 2020 06:50:55 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id gm17sm4674915pjb.46.2020.09.29.06.50.53 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Sep 2020 06:50:54 -0700 (PDT) From: Xin Long To: network dev , linux-sctp@vger.kernel.org Cc: Marcelo Ricardo Leitner , Neil Horman , Michael Tuexen , Tom Herbert , davem@davemloft.net Subject: [PATCH net-next 11/15] sctp: add udphdr to overhead when udp_port is set Date: Tue, 29 Sep 2020 21:49:03 +0800 Message-ID: <7ff312f910ada8893fa4db57d341c628d1122640.1601387231.git.lucien.xin@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <3f1b88ab88b5cc5321ffe094bcfeff68a3a5ef2c.1601387231.git.lucien.xin@gmail.com> References: <51c1fdad515076f3014476711aec1c0a81c18d36.1601387231.git.lucien.xin@gmail.com> <65f713004ab546e0b6ec793572c72c1d0399f0fe.1601387231.git.lucien.xin@gmail.com> <49a1cbb99341f50304b514aeaace078d0b065248.1601387231.git.lucien.xin@gmail.com> <97963ca7171b92486f46477b55928182abe44806.1601387231.git.lucien.xin@gmail.com> <3f1b88ab88b5cc5321ffe094bcfeff68a3a5ef2c.1601387231.git.lucien.xin@gmail.com> In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-sctp@vger.kernel.org Message-ID: <20200929134903.AzkPt9FdDzVsvpFDea400wX69X7jqYii37qvD_R7K8c@z> sctp_mtu_payload() is for calculating the frag size before making chunks from a msg. So we should only add udphdr size to overhead when udp socks are listening, as only then sctp can handling the incoming sctp over udp packets and outgoing sctp over udp packets will be possible. Note that we can't do this according to transport->encap_port, as different transports may be set to different values, while the chunks were made before choosing the transport, we could not be able to meet all rfc6951#section-5.6 requires. Signed-off-by: Xin Long --- include/net/sctp/sctp.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index bfd87a0..6408bbb 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -578,10 +578,13 @@ static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp, { __u32 overhead = sizeof(struct sctphdr) + extra; - if (sp) + if (sp) { overhead += sp->pf->af->net_header_len; - else + if (sock_net(&sp->inet.sk)->sctp.udp_port) + overhead += sizeof(struct udphdr); + } else { overhead += sizeof(struct ipv6hdr); + } if (WARN_ON_ONCE(mtu && mtu <= overhead)) mtu = overhead; -- 2.1.0