From patchwork Fri Dec 27 20:54:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helge Deller X-Patchwork-Id: 13922131 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3244CE7718B for ; Fri, 27 Dec 2024 20:56:21 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tRHMN-00043e-7q; Fri, 27 Dec 2024 15:55:03 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRHML-00042u-B9 for qemu-devel@nongnu.org; Fri, 27 Dec 2024 15:55:01 -0500 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tRHMJ-0000yX-Vs for qemu-devel@nongnu.org; Fri, 27 Dec 2024 15:55:01 -0500 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 57D705C5F70; Fri, 27 Dec 2024 20:54:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E614C4CED4; Fri, 27 Dec 2024 20:54:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1735332898; bh=7sDAkRnZ08OkWc2JgsOLVf4mCXc++peN2aQFHOAIuw4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=keD6rvbYqU6y+xgFQS/zd4g7sl7zMjD34Di8Tx6+3HdSClVNU0bZjvA3/BBOgdrxh 6BUtwXmzp98X9AAkflf4HMcgiuxDMON6akYe9kSE9VMt05Kr3+R2PvIkr8GL+N3WI0 v9Lfel2BM1qex7+AmGHY+dkoOU0La/uUx1UgzDD5Rc/wx6ik73s5mjz3ShrHQqcV3U tlmGUBs+dru9nzYRXnIC968oznwVwS+XZNsLBgejY2dKXENYpXkYwhD2xcSYME8bCw 0sQ5iUe6+f+9X96NgGuf6rQ1S73zTTj26WMVp+ja83PHD52CaPHWPsM3dYTvQU9VNF AEB4Hvg5ZMtvQ== From: deller@kernel.org To: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, Laurent Vivier , Richard Henderson Cc: deller@gmx.de Subject: [PATCH v2 4/6] linux-user: netlink: Add emulation of IP_MULTICAST_IF Date: Fri, 27 Dec 2024 21:54:47 +0100 Message-ID: <20241227205449.29311-5-deller@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241227205449.29311-1-deller@kernel.org> References: <20241227205449.29311-1-deller@kernel.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2604:1380:4641:c500::1; envelope-from=deller@kernel.org; helo=dfw.source.kernel.org X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.138, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Helge Deller Share code with IP_ADD_MEMBERSHIP/IP_DROP_MEMBERSHIP. Signed-off-by: Helge Deller --- linux-user/syscall.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index bbe2560927..4360543e20 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -2130,16 +2130,23 @@ static abi_long do_setsockopt(int sockfd, int level, int optname, } ret = get_errno(setsockopt(sockfd, level, optname, &val, sizeof(val))); break; + case IP_MULTICAST_IF: case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: { struct ip_mreqn ip_mreq; struct target_ip_mreqn *target_smreqn; + int min_size; QEMU_BUILD_BUG_ON(sizeof(struct ip_mreq) != sizeof(struct target_ip_mreq)); - if (optlen < sizeof (struct target_ip_mreq) || + if (optname == IP_MULTICAST_IF) { + min_size = sizeof(struct in_addr); + } else { + min_size = sizeof(struct target_ip_mreq); + } + if (optlen < min_size || optlen > sizeof (struct target_ip_mreqn)) { return -TARGET_EINVAL; } @@ -2149,7 +2156,9 @@ static abi_long do_setsockopt(int sockfd, int level, int optname, return -TARGET_EFAULT; } ip_mreq.imr_multiaddr.s_addr = target_smreqn->imr_multiaddr.s_addr; - ip_mreq.imr_address.s_addr = target_smreqn->imr_address.s_addr; + if (optlen >= sizeof(struct target_ip_mreq)) { + ip_mreq.imr_address.s_addr = target_smreqn->imr_address.s_addr; + } if (optlen == sizeof(struct target_ip_mreqn)) { ip_mreq.imr_ifindex = tswapal(target_smreqn->imr_ifindex); optlen = sizeof(struct ip_mreqn);