From nobody Thu Nov 27 14:02:38 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 74D122FE059 for ; Wed, 5 Nov 2025 09:29:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762334984; cv=none; b=CaJh4YkB9mzFcSlDLX+Br7yh8CRrHWIdUbbHBkibh9FanN0rOu0OOCEp8RB3GPDrTC+9MylmFaMyXJ0+3FV01VAVTTY019Qnba7FSielH+CVO+qaClfYuqIT3SyhSDDtfnAGHr3wD0snFQ+DfDW179tpIsK0sWVnhlrvnceJbKo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762334984; c=relaxed/simple; bh=Id8Y5cCpW8a6fTmhiL7u9VRBktxppJjIW8En60VP3lI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TBfYNXXDzQDwmPYX2D/mXpoYPB67DQypIRzxF9zFzcahpfSyioWCEUJ1mUWJ7CtsV01NQLvHAzpv2NJPRmCL7pkaNi30GP30Gz7bGSvArqEQYJ2n9N5dC6LwxPgo3y+qqfG9FBNatOnrFJe1rskxhkVlHSjMO2Ovy72jO27FW60= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Fn4Ft+jQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Fn4Ft+jQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0D4BAC4CEFB; Wed, 5 Nov 2025 09:29:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762334984; bh=Id8Y5cCpW8a6fTmhiL7u9VRBktxppJjIW8En60VP3lI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Fn4Ft+jQoQdMw7eL/4DrSY48RFyFrmiRCm5GU+D5yypT3LdyeABVfIcLqLTLF2tFt o7mh5beqvgVDHJnud8gW+P54q4sLvQebWdOHMv9pbIf1spMEkDH7OEnI0VrFM3FAbA BwdDG24+0tRsqXI2dzKpWMQz5WAFKMUXR0BZ/Z6o1cRfT/RaY6416yZ9luV9jcUZzt QBML9EJvg0ePC4prkDUX98VClLiXuiQZWimbzyOzaOiq3r2h4raxKtG8NE/53njvDq trOVirW5VQG/jLlmesQkg/KQx0WPJQ5hoPbgTtltLpaZz1MT7EYa8iyUkOumqY9uMa X+KX6q0AG6peA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v6 5/7] selftests: mptcp: sockopt: implement TCP_MD5SIG support Date: Wed, 5 Nov 2025 17:29:28 +0800 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Geliang Tang Add socket option handling for TCP_MD5SIG and TCP_MD5SIG_EXT. Configure MD5 keys using the key provided via '-m' parameter. Signed-off-by: Geliang Tang --- .../selftests/net/mptcp/mptcp_sockopt.c | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/test= ing/selftests/net/mptcp/mptcp_sockopt.c index fcf1d7a195d1..e577fbec9373 100644 --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c @@ -25,6 +25,7 @@ #include =20 #include +#include =20 static int pf =3D AF_INET; static bool md5; @@ -186,6 +187,50 @@ static void xgetaddrinfo(const char *node, const char = *service, } } =20 +static void do_setsockopt_md5sig(int fd) +{ + struct sockaddr_storage *addr; + size_t key_len =3D strlen(key); + struct tcp_md5sig md5sig; + int opt =3D TCP_MD5SIG; + + memset(&md5sig, 0, sizeof(md5sig)); + addr =3D (struct sockaddr_storage *)&md5sig.tcpm_addr; + addr->ss_family =3D pf; + + if ((pf =3D=3D AF_INET ? inet_pton(pf, "127.0.0.1", &((struct sockaddr_in= *)addr)->sin_addr) : + inet_pton(pf, "::1", &((struct sockaddr_in6 *)addr)->sin6_addr)) != =3D 1) + perror("inet_pton failed"); + + if (key_len > sizeof(md5sig.tcpm_key)) + perror("Key too long\n"); + + memcpy(md5sig.tcpm_key, key, key_len); + md5sig.tcpm_keylen =3D key_len; + + if (prefixlen || ifindex) + opt =3D TCP_MD5SIG_EXT; + + if (prefixlen) { + md5sig.tcpm_flags |=3D TCP_MD5SIG_FLAG_PREFIX; + md5sig.tcpm_prefixlen =3D prefixlen; + } + + if (ifindex) { + md5sig.tcpm_flags |=3D TCP_MD5SIG_FLAG_IFINDEX; + md5sig.tcpm_ifindex =3D (uint8_t)ifindex; + } + + if (setsockopt(fd, IPPROTO_TCP, opt, &md5sig, sizeof(md5sig))) + perror("setsockopt(TCP_MD5SIG)"); +} + +static void do_setsockopts(int fd) +{ + if (md5) + do_setsockopt_md5sig(fd); +} + static int sock_listen_mptcp(const char * const listenaddr, const char * const port) { @@ -213,6 +258,8 @@ static int sock_listen_mptcp(const char * const listena= ddr, sizeof(one))) perror("setsockopt"); =20 + do_setsockopts(sock); + if (bind(sock, a->ai_addr, a->ai_addrlen) =3D=3D 0) break; /* success */ =20 @@ -250,6 +297,8 @@ static int sock_connect_mptcp(const char * const remote= addr, if (sock < 0) continue; =20 + do_setsockopts(sock); + if (connect(sock, a->ai_addr, a->ai_addrlen) =3D=3D 0) break; /* success */ =20 --=20 2.43.0