From nobody Sun Feb 8 20:36:01 2026 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3FEC92288CB for ; Mon, 7 Apr 2025 08:51:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744015907; cv=none; b=ashp3vcJtXBF5EzJ9P6rI0No6UIHE9UD4f10tvKHuMlrAuZXt9812tRjYKnJK+LpPGxHnqP374OFriqu2mWova/d6SjXGmGh0z9R+tNSvkmi7S/GgIxXnL/JreImYJVKCM11PuhvCkkRb4I1vxjOxQbxxJS//y3hAtW1hCDueVQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744015907; c=relaxed/simple; bh=JzUuLgQjqzsuDFsOmyFLNHi+3ZA2NXJNSaqGAaMZIJc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=b2hPR71YWR/zEMrjwA0it/73IzCOFPeFdTHVRN6P5uZIXDfbtOFQIy4qyVZbssAiqsFtY1URCNvPkgazkUrw9rQ9EfDJFDEsY+Dgcwo/UYPnN3ghtbgylQMtKDGEF8msTI2nrUh8BFw8JwmNoZH65Po24jsZgcgoW9E3DIbG29M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com; spf=pass smtp.mailfrom=bytedance.com; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b=hudHDkwz; arc=none smtp.client-ip=209.85.215.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=bytedance.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bytedance.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bytedance.com header.i=@bytedance.com header.b="hudHDkwz" Received: by mail-pg1-f173.google.com with SMTP id 41be03b00d2f7-af28bc68846so3628448a12.1 for ; Mon, 07 Apr 2025 01:51:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1744015904; x=1744620704; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=1uyJxUSjwirFDuWmm3Ov2pKSAd0ErZhNjYPXSZRPwMg=; b=hudHDkwzHMFKEzT7mdhekPHwsOQAsrP6Ny/5DVlghsRkOSCgd+KdTm8xlEVMHpA35l W36haTVziOQCALDdix5wP1dDRAZLH++YGAB2PVpUpxBXCH9zj+GafFSCPYUWV+RtHa1R 8x+z41ht6Yqil3o9RLDC42HNfiHlO667FLVQFcgF+TOxW6m8KC6/tBYhtuL77nGqAH1y z/1EZfdPcqsqQUDnKu8k/ZyI4ujT9lM/0B++iBy5lPlzEvV2flgPJrOZrsFO4bkl0D0T 0bd6jxcSIinf85j5ctJyPX8eb3s4jZrH2m12ebvna/fsJP9o8Ceq4GzuHSMfT0YEVPLu YMCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744015904; x=1744620704; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=1uyJxUSjwirFDuWmm3Ov2pKSAd0ErZhNjYPXSZRPwMg=; b=siGA7Vp93iy89l/r7UP43gXgyD7iob/eaEODO+F36bD95bpfq7C0iP0qkIcygoTCxs rC7i0eRr53IxIhoqse1NxIjOVG6PcpY1E2dF17vHK7w9qMgpF3TPv7cLHSXqPKKAhgJT yW479H5QUI8yL/uHAgB+z69iTQJ8Sl+U2mXImbP2sxKRSmiyqivzr4NKtm9EpopZa7Aa PdfcKLHLBYnNyxRSbbPce6Smz99uVtpUEiFuV3XmBYnYa6UCFc3tGBZY2QM0kg1RIrNk GKxj8h0FCfaF5PyBNlNN4fQnb5JcE5E3HyHpovdmMKB8pI/+V0NApMu9apyQ4mdntmFU HJPw== X-Gm-Message-State: AOJu0YzuRbgagS5EoqnlTwBnz6pwfTb9Hs8A+/BlsrVLV0YWbsmLc1JR AKO/vHS8dHTq/L1Skbqk3NkCfAviX8ClVwoK1QBVfdWA9Ro8nASOmS/v2Ye07QX81vikINsahom L X-Gm-Gg: ASbGncvuc+7FqHZcU2RDDIEntKYD0RfxAptjR18GK8B5g/vC52vDPz5ph0P22iiXjem HI4XK4e7vuVdHCjLQ9r5ZKlglMYhQV7XeDFvRibrnUEkvOBz6JXXWcReB6vmmu3gMvSsOqPKCFr xcv4CMgWR3rAtyBQQAHaeXBXdkNza95NkZowApvdBQmq2vutnAqgyENuVa1r5J+z+f+8srWGb2t 0uFXs6ZCyAfAcUmfNlhR1AOwZK842GLXFTG0bLF533nl/X6UGKjfosTApkiEHyjxzcyJFWmjJcG N4IZo18eaoe6Zc50rntjvNaJ9/EUNxMpJz9GElLUv3fDRDc1v0aB1rZCkLqNVnHwT/w= X-Google-Smtp-Source: AGHT+IGW7/HQcOSrWsFxMUBwQZEFvu6hcIo8WL0C16qqewIUDvPZ3V176EqIWn668YLPeuSi7WpN/A== X-Received: by 2002:a17:902:f64d:b0:220:f87d:9d5b with SMTP id d9443c01a7336-22a8a867cfdmr200793525ad.24.1744015904387; Mon, 07 Apr 2025 01:51:44 -0700 (PDT) Received: from always-zbook.bytedance.net ([61.213.176.5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-229787727eesm75759455ad.224.2025.04.07.01.51.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Apr 2025 01:51:44 -0700 (PDT) From: zhenwei pi To: linux-kernel@vger.kernel.org, mptcp@lists.linux.dev, linux-kselftest@vger.kernel.org, netdev@vger.kernel.org Cc: matttbe@kernel.org, martineau@kernel.org, geliang@kernel.org, viktor.soderqvist@est.tech, zhenwei pi , zhenwei pi Subject: [PATCH] selftests: mptcp: add comment for getaddrinfo Date: Mon, 7 Apr 2025 16:51:22 +0800 Message-ID: <20250407085122.1203489-1-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" mptcp_connect.c is a startup tutorial of MPTCP programming, however there is a lack of ai_protocol(IPPROTO_MPTCP) usage. Add comment for getaddrinfo MPTCP support. Signed-off-by: zhenwei pi Signed-off-by: zhenwei pi --- tools/testing/selftests/net/mptcp/mptcp_connect.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/test= ing/selftests/net/mptcp/mptcp_connect.c index c83a8b47bbdf..6b9031273964 100644 --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c @@ -179,6 +179,18 @@ static void xgetnameinfo(const struct sockaddr *addr, = socklen_t addrlen, } } =20 +/* There is a lack of MPTCP support from glibc, these code leads error: + * struct addrinfo hints =3D { + * .ai_protocol =3D IPPROTO_MPTCP, + * ... + * }; + * err =3D getaddrinfo(node, service, &hints, res); + * ... + * So using IPPROTO_TCP to resolve, and use TCP/MPTCP to create socket. + * + * glibc starts to support MPTCP since v2.42. + * Link: https://sourceware.org/git/?p=3Dglibc.git;a=3Dcommit;h=3Da8e9022e= 0f82 + */ static void xgetaddrinfo(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res) --=20 2.34.1