From nobody Wed Sep 17 19:38:04 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 9DDFF22424E for ; Tue, 19 Aug 2025 09:00:31 +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=1755594031; cv=none; b=s5wq+MfYIYCXBxgqGPgqraQBPEzaW8ThbL7Fx5bI+Et8W93N6bV8IOyTZCyhh+pkIeVRPESAOJHD1iyhFxjOHbDuRQ/+uwkjmuPWCfuDOitCOcZ4A/VGgQqLnzW1pg2tV1F+RAVACSS92bD6ER2mag7FBoOsiRAvbH+aQtr8qf0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755594031; c=relaxed/simple; bh=J87gRu+lhUbmNeEj0rm9Cx+3jrK/nERyWETPs/7IZWw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QLqQIg8kIfNSjoc1WJKXQdk7YbRv+c2UsRw6MIsHjTJqkMoh+WSfrqj7BfqMnkInW6kWW6qi9lQ1+RcL5PsdiCyFlzRs2OEL/lTqG9AOD1Btha0veN3N7u53cYcSblBdrivWZJgPdk8I8P0OdR37CHAkoksNPSwq3KPqU71ZnNY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fha2bkCP; 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="fha2bkCP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0DCFC116B1; Tue, 19 Aug 2025 09:00:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755594031; bh=J87gRu+lhUbmNeEj0rm9Cx+3jrK/nERyWETPs/7IZWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fha2bkCP2BzfX+2tup/KBV76RLmaa9z3GFi+GY6oe/z6cPg4CCt8Lo5Np4HpURgD0 kwkbXb45AlvsLVecBLIugfq6lWnDIAZxRWO7IgEJpS+sG+HAZNmzMDZ1BB6bGhKnLN nYVO/cDk4rvGbN9nZKNA1qhjxsvwAIvms08dMNoaPeuUuDMyZwUN5qFXnv7uQjysJJ 2R0S0DV9OE/p3jTbnKKfBbaZWFXMtTh0xBVHfko3H9tDHtb1sRZzNAaR68UF9TZouH qRoFG53EZSi8Q0F6QV2tWyTj7hGr3vC7XuoI4LvRWvFgeWmoZMIKNQI1rQI2TMLW3w AMHeCNcImqnEQ== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next 05/11] selftests: mptcp: sockopt: add SO_BINDTOIFINDEX test Date: Tue, 19 Aug 2025 17:00:11 +0800 Message-ID: <0888dbece9afe24eab9e838fec4d3809d2afc3e5.1755592822.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.48.1 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 Implement tests for the SO_BINDTOIFINDEX socket option: - Uses ioctl to get the loopback interface index - Sets the option to bind to "lo" - Validates the bound index via getsockopt - Supports both IPv4 and IPv6 Signed-off-by: Geliang Tang --- .../selftests/net/mptcp/mptcp_sockopt.c | 41 +++++++++++++++++++ .../selftests/net/mptcp/mptcp_sockopt.sh | 8 ++++ 2 files 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 df4f85f129f7..25456e540cad 100644 --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c @@ -20,6 +20,7 @@ #include #include #include +#include =20 #include #include @@ -208,11 +209,36 @@ static void do_setsockopt_bindtodevice(int fd) perror("setsockopt(SO_BINDTODEVICE)"); } =20 +static int get_ifindex(int fd, const char *ifname) +{ + struct ifreq ifr; + + memset(&ifr, 0, sizeof(ifr)); + strncpy(ifr.ifr_name, ifname, IFNAMSIZ); + + if (ioctl(fd, SIOCGIFINDEX, &ifr) < 0) { + perror("ioctl"); + return -1; + } + + return ifr.ifr_ifindex; +} + +static void do_setsockopt_bindtoifindex(int fd) +{ + int ifindex =3D get_ifindex(fd, "lo"); + + if (setsockopt(fd, SOL_SOCKET, SO_BINDTOIFINDEX, + &ifindex, sizeof(ifindex))) + perror("setsockopt(SO_BINDTOIFINDEX)"); +} + static void do_setsockopts(int fd) { do_setsockopt_reuseaddr(fd); do_setsockopt_reuseport(fd); do_setsockopt_bindtodevice(fd); + do_setsockopt_bindtoifindex(fd); } =20 static int sock_listen_mptcp(const char * const listenaddr, @@ -622,6 +648,19 @@ static void do_getsockopt_bindtodevice(int fd) assert(!memcmp(ifname, "lo", len)); } =20 +static void do_getsockopt_bindtoifindex(int fd) +{ + socklen_t len; + int ifindex; + + len =3D sizeof(ifindex); + if (getsockopt(fd, SOL_SOCKET, SO_BINDTOIFINDEX, + &ifindex, &len)) + die_perror("getsockopt(SO_BINDTOIFINDEX)"); + + assert(ifindex =3D=3D get_ifindex(fd, "lo")); +} + static void do_getsockopts(struct so_state *s, int fd, size_t r, size_t w) { do_getsockopt_mptcp_info(s, fd, w); @@ -638,6 +677,8 @@ static void do_getsockopts(struct so_state *s, int fd, = size_t r, size_t w) do_getsockopt_reuseport(fd); =20 do_getsockopt_bindtodevice(fd); + + do_getsockopt_bindtoifindex(fd); } =20 static void connect_one_server(int fd, int pipefd) diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh b/tools/tes= ting/selftests/net/mptcp/mptcp_sockopt.sh index 948e54b50c43..8eae13f4da38 100755 --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh @@ -285,6 +285,10 @@ do_mptcp_sockopt_tests() mptcp_lib_pr_ok mptcp_lib_result_pass "SO_BINDTODEVICE sockopt v4" =20 + print_title "SO_BINDTOIFINDEX sockopt v4" + mptcp_lib_pr_ok + mptcp_lib_result_pass "SO_BINDTOIFINDEX sockopt v4" + ip netns exec "$ns_sbox" ./mptcp_sockopt -6 lret=3D$? =20 @@ -311,6 +315,10 @@ do_mptcp_sockopt_tests() print_title "SO_BINDTODEVICE sockopt v6" mptcp_lib_pr_ok mptcp_lib_result_pass "SO_BINDTODEVICE sockopt v6" + + print_title "SO_BINDTOIFINDEX sockopt v6" + mptcp_lib_pr_ok + mptcp_lib_result_pass "SO_BINDTOIFINDEX sockopt v6" } =20 run_tests() --=20 2.48.1