From patchwork Mon Oct 19 12:25:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xin Long X-Patchwork-Id: 298812 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 902C8C43457 for ; Mon, 19 Oct 2020 12:26:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D248222B8 for ; Mon, 19 Oct 2020 12:26:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nj8W4Rsp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727483AbgJSM0q (ORCPT ); Mon, 19 Oct 2020 08:26:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726669AbgJSM0q (ORCPT ); Mon, 19 Oct 2020 08:26:46 -0400 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F27BAC0613CE; Mon, 19 Oct 2020 05:26:44 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id gv6so5618475pjb.4; Mon, 19 Oct 2020 05:26:44 -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=chT+1o8Xi621C2FvgvkILiU4uVhJ0TT4r54HGt7i2kM=; b=nj8W4RspfBpzQ1vCEEUOo4/d2zwdyms1ncUaR6YDjdQqFjucyPubIO8MVddEhmiDXi 9RvBXgiep+i9woRc1DDi4H6m3uCcqPYiiSmMa/sH8Gn+Nc0U5vB95ZFA7fSMiKE8zxvD 3qDSyAphFOpva6XznRwqvSGXfmHg5yiCSbZ6EhWIihFZcqw++Hnmp/PbK6fxgycBjvA/ PBuoi+FBChYbUMX9jEb9sPDvcbXhFiQpyqHpXQ1YWR/m1M3b8HeHdOuy6FgocqmKDX2Y bIHIdSVsslqUWp0/WywUpIMGKor/IZCZP1XxzeUiQwbWU+IpjYbWCchmItKo4+38RMwn PN6Q== 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=chT+1o8Xi621C2FvgvkILiU4uVhJ0TT4r54HGt7i2kM=; b=RxiX1Bdbo9sXqV1HzYntf+IfYjWUHlFFDb5gJbeUsAjbCXwABlD7gOZDsL0a/B5mZ+ FnkzEPNYL4pILB7V+QYv/L1QZD+mQJwFIeTSsjDD/1uS4gvb+bzTm701ZAW8xHDN2T63 4yHEIwvr8VH+GPfiCxkibynXsmbQHbJCiptbQCSOeEvVdSNW3sGTNYm4/IT+uI+Wa2y4 u1t2LBRio1tq8/p6Bz6LgtrvdsgC7ttI+OOIXV1vV/6qGjnDH1s9MZ2IqTcfD9PSJgJS KDcDUCKAxVN68peLl6G2KfKVexuYky4JBHFxfbJJzUiJRh2FKqSmBOPOzRKvKOqENd2w RgBA== X-Gm-Message-State: AOAM531wZ2Wfm15JhjQMdv4QQAtEUsY6/fAvHJK8a3l0rKkDBgVshpRS 8ohYHBnmaXiAUN/b9Fx5yLIxRgIVHgc= X-Google-Smtp-Source: ABdhPJyzZm3DeEhOSaCeOCP67WT4GPhPbL+aa624VrwRaBwNOnhVf/R0UYhoEz0jyPAm3LILfuHfdQ== X-Received: by 2002:a17:90a:5b05:: with SMTP id o5mr16908779pji.139.1603110404245; Mon, 19 Oct 2020 05:26:44 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id n3sm11011432pgf.11.2020.10.19.05.26.43 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Oct 2020 05:26:43 -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: [PATCHv4 net-next 08/16] sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt Date: Mon, 19 Oct 2020 20:25:25 +0800 Message-Id: <25013493737f5b488ce48c38667a077ca6573dd5.1603110316.git.lucien.xin@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: References: <71b3af0fb347f27b5c3bf846dbd34485d9f80af0.1603110316.git.lucien.xin@gmail.com> <5f06ac649f4b63fc5a254812a963cada3183f136.1603110316.git.lucien.xin@gmail.com> <7a2f5792c1a428c16962fff08b7bcfedc21bd5e2.1603110316.git.lucien.xin@gmail.com> <7cfd72e42b8b1cde268ad4062c96c08a56c4b14f.1603110316.git.lucien.xin@gmail.com> In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch is to implement: rfc6951#section-6.1: Get or Set the Remote UDP Encapsulation Port Number with the param of the struct: struct sctp_udpencaps { sctp_assoc_t sue_assoc_id; struct sockaddr_storage sue_address; uint16_t sue_port; }; the encap_port of sock, assoc or transport can be changed by users, which also means it allows the different transports of the same asoc to have different encap_port value. v1->v2: - no change. v2->v3: - fix the endian warning when setting values between encap_port and sue_port. Signed-off-by: Xin Long --- include/uapi/linux/sctp.h | 7 +++ net/sctp/socket.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 121 insertions(+) diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h index 28ad40d..cb78e7a 100644 --- a/include/uapi/linux/sctp.h +++ b/include/uapi/linux/sctp.h @@ -140,6 +140,7 @@ typedef __s32 sctp_assoc_t; #define SCTP_ECN_SUPPORTED 130 #define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 131 #define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE +#define SCTP_REMOTE_UDP_ENCAPS_PORT 132 /* PR-SCTP policies */ #define SCTP_PR_SCTP_NONE 0x0000 @@ -1197,6 +1198,12 @@ struct sctp_event { uint8_t se_on; }; +struct sctp_udpencaps { + sctp_assoc_t sue_assoc_id; + struct sockaddr_storage sue_address; + uint16_t sue_port; +}; + /* SCTP Stream schedulers */ enum sctp_sched_type { SCTP_SS_FCFS, diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 09b94cd..2a9ee9b 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4417,6 +4417,55 @@ static int sctp_setsockopt_pf_expose(struct sock *sk, return retval; } +static int sctp_setsockopt_encap_port(struct sock *sk, + struct sctp_udpencaps *encap, + unsigned int optlen) +{ + struct sctp_association *asoc; + struct sctp_transport *t; + __be16 encap_port; + + if (optlen != sizeof(*encap)) + return -EINVAL; + + /* If an address other than INADDR_ANY is specified, and + * no transport is found, then the request is invalid. + */ + encap_port = (__force __be16)encap->sue_port; + if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) { + t = sctp_addr_id2transport(sk, &encap->sue_address, + encap->sue_assoc_id); + if (!t) + return -EINVAL; + + t->encap_port = encap_port; + return 0; + } + + /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the + * socket is a one to many style socket, and an association + * was not found, then the id was invalid. + */ + asoc = sctp_id2assoc(sk, encap->sue_assoc_id); + if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC && + sctp_style(sk, UDP)) + return -EINVAL; + + /* If changes are for association, also apply encap_port to + * each transport. + */ + if (asoc) { + list_for_each_entry(t, &asoc->peer.transport_addr_list, + transports) + t->encap_port = encap_port; + + return 0; + } + + sctp_sk(sk)->encap_port = encap_port; + return 0; +} + /* API 6.2 setsockopt(), getsockopt() * * Applications use setsockopt() and getsockopt() to set or retrieve @@ -4636,6 +4685,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE: retval = sctp_setsockopt_pf_expose(sk, kopt, optlen); break; + case SCTP_REMOTE_UDP_ENCAPS_PORT: + retval = sctp_setsockopt_encap_port(sk, kopt, optlen); + break; default: retval = -ENOPROTOOPT; break; @@ -7791,6 +7843,65 @@ static int sctp_getsockopt_pf_expose(struct sock *sk, int len, return retval; } +static int sctp_getsockopt_encap_port(struct sock *sk, int len, + char __user *optval, int __user *optlen) +{ + struct sctp_association *asoc; + struct sctp_udpencaps encap; + struct sctp_transport *t; + __be16 encap_port; + + if (len < sizeof(encap)) + return -EINVAL; + + len = sizeof(encap); + if (copy_from_user(&encap, optval, len)) + return -EFAULT; + + /* If an address other than INADDR_ANY is specified, and + * no transport is found, then the request is invalid. + */ + if (!sctp_is_any(sk, (union sctp_addr *)&encap.sue_address)) { + t = sctp_addr_id2transport(sk, &encap.sue_address, + encap.sue_assoc_id); + if (!t) { + pr_debug("%s: failed no transport\n", __func__); + return -EINVAL; + } + + encap_port = t->encap_port; + goto out; + } + + /* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the + * socket is a one to many style socket, and an association + * was not found, then the id was invalid. + */ + asoc = sctp_id2assoc(sk, encap.sue_assoc_id); + if (!asoc && encap.sue_assoc_id != SCTP_FUTURE_ASSOC && + sctp_style(sk, UDP)) { + pr_debug("%s: failed no association\n", __func__); + return -EINVAL; + } + + if (asoc) { + encap_port = asoc->encap_port; + goto out; + } + + encap_port = sctp_sk(sk)->encap_port; + +out: + encap.sue_port = (__force uint16_t)encap_port; + if (copy_to_user(optval, &encap, len)) + return -EFAULT; + + if (put_user(len, optlen)) + return -EFAULT; + + return 0; +} + static int sctp_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { @@ -8011,6 +8122,9 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname, case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE: retval = sctp_getsockopt_pf_expose(sk, len, optval, optlen); break; + case SCTP_REMOTE_UDP_ENCAPS_PORT: + retval = sctp_getsockopt_encap_port(sk, len, optval, optlen); + break; default: retval = -ENOPROTOOPT; break;