From patchwork Tue Oct 13 07:27:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xin Long X-Patchwork-Id: 11835101 X-Patchwork-Delegate: kuba@kernel.org 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=ham 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 5479DC433E7 for ; Tue, 13 Oct 2020 07:29:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D3F820878 for ; Tue, 13 Oct 2020 07:29:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="O97GTLRt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390287AbgJMH3b (ORCPT ); Tue, 13 Oct 2020 03:29:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390040AbgJMH3b (ORCPT ); Tue, 13 Oct 2020 03:29:31 -0400 Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D088CC0613D0; Tue, 13 Oct 2020 00:29:29 -0700 (PDT) Received: by mail-pl1-x642.google.com with SMTP id p11so10200569pld.5; Tue, 13 Oct 2020 00:29:29 -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=zpcgNpTt1Eopd9QaDKGy8sWqns6Rwfi4+2UKE6Sn+wQ=; b=O97GTLRtn6UX8SRqec/Oq2uokgNhHd03+Z0nVj5R2covIwshJwhjQRMwDS87Os5XHw +qnAKZJo10pTh5tf/zy4LGdFSDNNetTGh7TX8r5kDQ6Y6agkOAgglveYUR3H3YEa6P7V AmwqOiLDt70xU6NImnT/j56TCUtyxfHyilDST/4YkOPwjD3IbhWsaRh1AWgQcgUPcaKZ hGvSaUVAJL5bjkSaZ92S366FDRVhume9kZ0sJNw/dWtflm5x0aMBVyHpvtxkjthhVb/K 6ZMpR97/5Q4ISUq0fsIKIg+MwaHnk5fWHMdQjJ/L41RDKhAmTeuoE9+wrahYT7brPs5K C5nA== 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=zpcgNpTt1Eopd9QaDKGy8sWqns6Rwfi4+2UKE6Sn+wQ=; b=SXHgIp+JitY0bvNwet4CJaPhxPdmchEUumre5HtqUHnKlElFtoYwwq62fF4An9sO7Z 5TCQOdz3MivYk1opgu+DhwLCYGlIx26CPd1klRKDHLSf9RbvMtB3Fr8F4OOmpG78b8do slXi6Q/A3unrvapQgfYlwshDxKaEtG2/9sDjwv7svDkw3Pf88jf8G3Pb2NQRurloDWDA 7q8Py0sM0Q8VNTJw3Jgyi1sS6vEJq0duaxhtbXSIjl5TrP+qNwzNvM+bpLmtWcSIh69x M7ZSy1FawEszZie0bIXAJrBNdMccMuXKTuw1P4pwk+OsQdpFQPZY+Go4Ew1UFiyfMWAE qdsQ== X-Gm-Message-State: AOAM531l6AQwioquQA9oLpPLv8LglkuOtE1fQODfhVI6S65HwUqGCyp1 dviVRFe6B+yl4gVNeA8B0YyRXBGecYI= X-Google-Smtp-Source: ABdhPJyk+JhvBLWAwHmlIfHz8QTnISCzVXUeHYCsqLOXuF7iyPwQhDVt7xfVgmi5zd5GWTD+nMQfFQ== X-Received: by 2002:a17:90a:a111:: with SMTP id s17mr24714455pjp.28.1602574169160; Tue, 13 Oct 2020 00:29:29 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id b3sm21762739pfd.66.2020.10.13.00.29.28 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 13 Oct 2020 00:29:28 -0700 (PDT) From: Xin Long To: network dev , linux-sctp@vger.kernel.org Cc: Marcelo Ricardo Leitner , Neil Horman , Michael Tuexen , davem@davemloft.net, gnault@redhat.com, pabeni@redhat.com, willemdebruijn.kernel@gmail.com Subject: [PATCHv3 net-next 13/16] sctp: support for sending packet over udp6 sock Date: Tue, 13 Oct 2020 15:27:38 +0800 Message-Id: X-Mailer: git-send-email 2.1.0 In-Reply-To: <46f33eb9331b7e1e688a7f125201ad600ae83fbd.1602574012.git.lucien.xin@gmail.com> References: <7159fb58f44f9ff00ca5b3b8a26ee3aa2fd1bf8a.1602574012.git.lucien.xin@gmail.com> <37e9f70ffb9dea1572025b8e1c4b1f1c6e6b3da5.1602574012.git.lucien.xin@gmail.com> <08854ecf72eee34d3e98e30def6940d94f97fdef.1602574012.git.lucien.xin@gmail.com> <732baa9aef67a1b0d0b4d69f47149b41a49bbd76.1602574012.git.lucien.xin@gmail.com> <4885b112360b734e25714499346e6dc22246a87d.1602574012.git.lucien.xin@gmail.com> <46f33eb9331b7e1e688a7f125201ad600ae83fbd.1602574012.git.lucien.xin@gmail.com> In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This one basically does the similar things in sctp_v6_xmit as does for udp4 sock in the last patch, just note that: 1. label needs to be calculated, as it's the param of udp_tunnel6_xmit_skb(). 2. The 'nocheck' param of udp_tunnel6_xmit_skb() is false, as required by RFC. v1->v2: - Use sp->udp_port instead in sctp_v6_xmit(), which is more safe. Signed-off-by: Xin Long --- net/sctp/ipv6.c | 43 ++++++++++++++++++++++++++++++++----------- 1 file changed, 32 insertions(+), 11 deletions(-) diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index a064bf2..814754d 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -55,6 +55,7 @@ #include #include #include +#include #include @@ -191,33 +192,53 @@ static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, return ret; } -static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) +static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *t) { + struct dst_entry *dst = dst_clone(t->dst); + struct flowi6 *fl6 = &t->fl.u.ip6; struct sock *sk = skb->sk; struct ipv6_pinfo *np = inet6_sk(sk); - struct flowi6 *fl6 = &transport->fl.u.ip6; __u8 tclass = np->tclass; - int res; + __be32 label; pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, skb->len, &fl6->saddr, &fl6->daddr); - if (transport->dscp & SCTP_DSCP_SET_MASK) - tclass = transport->dscp & SCTP_DSCP_VAL_MASK; + if (t->dscp & SCTP_DSCP_SET_MASK) + tclass = t->dscp & SCTP_DSCP_VAL_MASK; if (INET_ECN_is_capable(tclass)) IP6_ECN_flow_xmit(sk, fl6->flowlabel); - if (!(transport->param_flags & SPP_PMTUD_ENABLE)) + if (!(t->param_flags & SPP_PMTUD_ENABLE)) skb->ignore_df = 1; SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS); - rcu_read_lock(); - res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt), - tclass, sk->sk_priority); - rcu_read_unlock(); - return res; + if (!t->encap_port || !sctp_sk(sk)->udp_port) { + int res; + + skb_dst_set(skb, dst); + rcu_read_lock(); + res = ip6_xmit(sk, skb, fl6, sk->sk_mark, + rcu_dereference(np->opt), + tclass, sk->sk_priority); + rcu_read_unlock(); + return res; + } + + if (skb_is_gso(skb)) + skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL_CSUM; + + skb->encapsulation = 1; + skb_reset_inner_mac_header(skb); + skb_reset_inner_transport_header(skb); + skb_set_inner_ipproto(skb, IPPROTO_SCTP); + label = ip6_make_flowlabel(sock_net(sk), skb, fl6->flowlabel, true, fl6); + + return udp_tunnel6_xmit_skb(dst, sk, skb, NULL, &fl6->saddr, + &fl6->daddr, tclass, ip6_dst_hoplimit(dst), + label, sctp_sk(sk)->udp_port, t->encap_port, false); } /* Returns the dst cache entry for the given source and destination ip