From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f53.google.com (mail-wr1-f53.google.com [209.85.221.53]) (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 0167C3A7826 for ; Tue, 17 Mar 2026 10:40:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.53 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773744037; cv=none; b=FZT5visrQfL8zmFXAUNwkMEdb0hpYVrUp5RtzfmknNVyHO1fVYkHvtQ1SAE64zNCOl4SrFHsUOVxtt2YU5TAV5DDVw1QQdt2+IBFpV1KTlhRM6mtdijmL307ooPpiXgjA3BlZ8xhv0lIJZ22N2BWxu0k5bKFB1cv5nNfrwkHbTw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773744037; c=relaxed/simple; bh=JSJGJMK6KyufJ/PXMyD+v1i6aM7TmhBZWN5SubcrK5g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=deafh35HRutr0YgMKJj6QQtMfo123o8Shd4AqLJRYreG/r7ez/wRoTsIT9xQQXVYn4fKoSyYEs9jwZlafMx7NQ6tBskk1Ok5yrJksWzDM4+L78Hb9/h19w3yyOY33FR9Oeiv4q0we1HQb4nU4sW1jqO/wonhkHwYD8PkWk+PZvk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=openvpn.net; spf=pass smtp.mailfrom=openvpn.com; dkim=pass (2048-bit key) header.d=openvpn.net header.i=@openvpn.net header.b=gt3dfbXI; arc=none smtp.client-ip=209.85.221.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=openvpn.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=openvpn.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=openvpn.net header.i=@openvpn.net header.b="gt3dfbXI" Received: by mail-wr1-f53.google.com with SMTP id ffacd0b85a97d-439b97a8a8cso5597081f8f.1 for ; Tue, 17 Mar 2026 03:40:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=openvpn.net; s=google; t=1773744034; x=1774348834; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=qqDo5H8oLMcH1+Hu7RTzP1KSiSjs6M89cDFS4JLvEmU=; b=gt3dfbXIuhYJ8NXXm/mAzpmJBnyhqIEueiSPWx/7AjGLK8jScMQ71THjKzbPIwlGQ1 J1njvW80IPj/QG2IFRUV/XJMfVj0UEGxC8fUALttJIgmzVFKqiHq5Z7MnEoRpwlUvhwg +8Mt/XoYFmt1l89pcC4q9PrPvomlZks4el98dzUd2jXLKH/utEFhvlc0QWu01Y+qe2f8 GYC5SZ8kFwl7Mw+jh6jxXeNE0RHxAXYj7oFso5aSReBA8BDxF17FBQ0W7/+85Mk2TucX o/PG7gq8RLPfuG2SioFi5fvsZGWWUW3HF6ca/jwHieHdzooR5qzHhOD+iHg8Kw5ySCgV ZQ7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773744034; x=1774348834; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=qqDo5H8oLMcH1+Hu7RTzP1KSiSjs6M89cDFS4JLvEmU=; b=fCtz7M5qatPJ8xO+xFjFLb/gT3C/WjCaAO8+rJkZDrRqpxjkPjcCD97Im5Dh/xuC8P h75PLB0zdBYHGTDZRp1kBv90iCGAtHt+vV2e253oaJGiDipyF5ErA7KgOZOX03EiXpY8 1TgPlgt0itwsokJOMoEYRHJzpr+LMQpLd/Cv/4EpGI7CZHgkwzlSp6RHLbefyLfty48+ zL7fSPscjT0FM7V+uEePHGnhpoo4uuYpfYo1d+LoZK2tdJ5PPr5VnQVKyf3KuoyiVIJj DtroAfJS0JaaH47UGOmlxXnO7mL4y0Qw7SFc9273Od8zMrz3fNQVmBb+i54GJYa1Nd6u Ty8Q== X-Gm-Message-State: AOJu0YxhVAIfNpgTjQMNBWiZ9nO+CxG9FPrjLRNwM7O51vy5MdMbEtfe GTvIN12eISGd1p4pLljzldMIOBGrbeh8Xqu183a0ZgS0dQ8vm10kDXdizBKnEFKtaX3P+p4K7Oq hEAGmZN5ctQ5eACAScnRB73br1KfsPP21UuAhQYmh2YLSz/ADf8gD7IY53LpqG97v X-Gm-Gg: ATEYQzzENs/j7ygBXebxyegPhMJXzkRSLewApcjZtxt4LT/gFhzwlBbCCj6sVt7dTZ9 ye493nPDl/qlqzk1k0pTh8kvOiJ7BRUOUucvxHp/KT6b/Yr7QQKU6/oovShxeD6ghI9+t1wpRx2 VKms82W5YZzod10U0xVbnCg7UpFTzL2ItmfxlEuUkwY5DnzbTG68/5LfZguSMUeA/59dpEfowuH Z7H2+7BESotq6DqEb+7ClBhsWPkzUIJbqSzeYVwX1glaGyL6wFBtF7wFys6ekykPPakXY5s8DFL lHk9mPDNGkJRl64POgb60YC5bii8FmDmsYe4Z74vvMFlAXbnaYMA7/ggRTF5gr4l9JePRbnYPPJ d2xEXq/4aX2NfihUNzF8QRJzlQHRY+RxZTyn4KjO1YOx/POFgWNeRniszBXREP57oMRx10imvZZ fohcTUaiNz4KgOf5aEI/+eQQKfcljZJ6ss7WE= X-Received: by 2002:a05:6000:40ce:b0:439:abcd:b305 with SMTP id ffacd0b85a97d-43a04d87081mr29517629f8f.13.1773744032972; Tue, 17 Mar 2026 03:40:32 -0700 (PDT) Received: from inifinity.mandelbit.com ([2001:67c:2fbc:1:4f22:3f9:13dd:cf23]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-439fe22529csm49948215f8f.31.2026.03.17.03.40.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Mar 2026 03:40:32 -0700 (PDT) From: Antonio Quartulli To: netdev@vger.kernel.org Cc: ralf@mandelbit.com, Sabrina Dubroca , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" , Eric Dumazet , linux-kselftest@vger.kernel.org, horms@kernel.org, shuah@kernel.org, donald.hunter@gmail.com, Antonio Quartulli Subject: [PATCH net-next 4/9] ovpn: notify userspace on client float event Date: Tue, 17 Mar 2026 11:40:18 +0100 Message-ID: <20260317104023.192548-5-antonio@openvpn.net> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260317104023.192548-1-antonio@openvpn.net> References: <20260317104023.192548-1-antonio@openvpn.net> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ralf Lici Send a netlink notification when a client updates its remote UDP endpoint. The notification includes the new IP address, port, and scope ID (for IPv6). Cc: linux-kselftest@vger.kernel.org Cc: horms@kernel.org Cc: shuah@kernel.org Cc: donald.hunter@gmail.com Signed-off-by: Ralf Lici Signed-off-by: Antonio Quartulli Reviewed-by: Sabrina Dubroca --- Documentation/netlink/specs/ovpn.yaml | 6 ++ drivers/net/ovpn/netlink.c | 82 +++++++++++++++++++++ drivers/net/ovpn/netlink.h | 2 + drivers/net/ovpn/peer.c | 2 + include/uapi/linux/ovpn.h | 1 + tools/testing/selftests/net/ovpn/ovpn-cli.c | 3 + 6 files changed, 96 insertions(+) diff --git a/Documentation/netlink/specs/ovpn.yaml b/Documentation/netlink/specs/ovpn.yaml index 1b91045cee2e..0d0c028bf96f 100644 --- a/Documentation/netlink/specs/ovpn.yaml +++ b/Documentation/netlink/specs/ovpn.yaml @@ -502,6 +502,12 @@ operations: - ifindex - keyconf + - + name: peer-float-ntf + doc: Notification about a peer floating (changing its remote UDP endpoint) + notify: peer-get + mcgrp: peers + mcast-groups: list: - diff --git a/drivers/net/ovpn/netlink.c b/drivers/net/ovpn/netlink.c index fed0e46b32a3..e10d7f9a28f5 100644 --- a/drivers/net/ovpn/netlink.c +++ b/drivers/net/ovpn/netlink.c @@ -1203,6 +1203,88 @@ int ovpn_nl_peer_del_notify(struct ovpn_peer *peer) return ret; } +/** + * ovpn_nl_peer_float_notify - notify userspace about peer floating + * @peer: the floated peer + * @ss: sockaddr representing the new remote endpoint + * + * Return: 0 on success or a negative error code otherwise + */ +int ovpn_nl_peer_float_notify(struct ovpn_peer *peer, + const struct sockaddr_storage *ss) +{ + struct ovpn_socket *sock; + struct sockaddr_in6 *sa6; + struct sockaddr_in *sa; + struct sk_buff *msg; + struct nlattr *attr; + int ret = -EMSGSIZE; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &ovpn_nl_family, 0, + OVPN_CMD_PEER_FLOAT_NTF); + if (!hdr) { + ret = -ENOBUFS; + goto err_free_msg; + } + + if (nla_put_u32(msg, OVPN_A_IFINDEX, peer->ovpn->dev->ifindex)) + goto err_cancel_msg; + + attr = nla_nest_start(msg, OVPN_A_PEER); + if (!attr) + goto err_cancel_msg; + + if (nla_put_u32(msg, OVPN_A_PEER_ID, peer->id)) + goto err_cancel_msg; + + if (ss->ss_family == AF_INET) { + sa = (struct sockaddr_in *)ss; + if (nla_put_in_addr(msg, OVPN_A_PEER_REMOTE_IPV4, + sa->sin_addr.s_addr) || + nla_put_net16(msg, OVPN_A_PEER_REMOTE_PORT, sa->sin_port)) + goto err_cancel_msg; + } else if (ss->ss_family == AF_INET6) { + sa6 = (struct sockaddr_in6 *)ss; + if (nla_put_in6_addr(msg, OVPN_A_PEER_REMOTE_IPV6, + &sa6->sin6_addr) || + nla_put_u32(msg, OVPN_A_PEER_REMOTE_IPV6_SCOPE_ID, + sa6->sin6_scope_id) || + nla_put_net16(msg, OVPN_A_PEER_REMOTE_PORT, sa6->sin6_port)) + goto err_cancel_msg; + } else { + ret = -EAFNOSUPPORT; + goto err_cancel_msg; + } + + nla_nest_end(msg, attr); + genlmsg_end(msg, hdr); + + rcu_read_lock(); + sock = rcu_dereference(peer->sock); + if (!sock) { + ret = -EINVAL; + goto err_unlock; + } + genlmsg_multicast_netns(&ovpn_nl_family, sock_net(sock->sk), msg, + 0, OVPN_NLGRP_PEERS, GFP_ATOMIC); + rcu_read_unlock(); + + return 0; + +err_unlock: + rcu_read_unlock(); +err_cancel_msg: + genlmsg_cancel(msg, hdr); +err_free_msg: + nlmsg_free(msg); + return ret; +} + /** * ovpn_nl_key_swap_notify - notify userspace peer's key must be renewed * @peer: the peer whose key needs to be renewed diff --git a/drivers/net/ovpn/netlink.h b/drivers/net/ovpn/netlink.h index 8615dfc3c472..11ee7c681885 100644 --- a/drivers/net/ovpn/netlink.h +++ b/drivers/net/ovpn/netlink.h @@ -13,6 +13,8 @@ int ovpn_nl_register(void); void ovpn_nl_unregister(void); int ovpn_nl_peer_del_notify(struct ovpn_peer *peer); +int ovpn_nl_peer_float_notify(struct ovpn_peer *peer, + const struct sockaddr_storage *ss); int ovpn_nl_key_swap_notify(struct ovpn_peer *peer, u8 key_id); #endif /* _NET_OVPN_NETLINK_H_ */ diff --git a/drivers/net/ovpn/peer.c b/drivers/net/ovpn/peer.c index 3716a1d82801..4e145b4497e6 100644 --- a/drivers/net/ovpn/peer.c +++ b/drivers/net/ovpn/peer.c @@ -287,6 +287,8 @@ void ovpn_peer_endpoints_update(struct ovpn_peer *peer, struct sk_buff *skb) spin_unlock_bh(&peer->lock); + ovpn_nl_peer_float_notify(peer, &ss); + /* rehashing is required only in MP mode as P2P has one peer * only and thus there is no hashtable */ diff --git a/include/uapi/linux/ovpn.h b/include/uapi/linux/ovpn.h index 959b41def61f..0cce0d58b830 100644 --- a/include/uapi/linux/ovpn.h +++ b/include/uapi/linux/ovpn.h @@ -100,6 +100,7 @@ enum { OVPN_CMD_KEY_SWAP, OVPN_CMD_KEY_SWAP_NTF, OVPN_CMD_KEY_DEL, + OVPN_CMD_PEER_FLOAT_NTF, __OVPN_CMD_MAX, OVPN_CMD_MAX = (__OVPN_CMD_MAX - 1) diff --git a/tools/testing/selftests/net/ovpn/ovpn-cli.c b/tools/testing/selftests/net/ovpn/ovpn-cli.c index 0f3babf19fd0..7178abae1b2f 100644 --- a/tools/testing/selftests/net/ovpn/ovpn-cli.c +++ b/tools/testing/selftests/net/ovpn/ovpn-cli.c @@ -1516,6 +1516,9 @@ static int ovpn_handle_msg(struct nl_msg *msg, void *arg) case OVPN_CMD_PEER_DEL_NTF: fprintf(stdout, "received CMD_PEER_DEL_NTF\n"); break; + case OVPN_CMD_PEER_FLOAT_NTF: + fprintf(stdout, "received CMD_PEER_FLOAT_NTF\n"); + break; case OVPN_CMD_KEY_SWAP_NTF: fprintf(stdout, "received CMD_KEY_SWAP_NTF\n"); break; -- 2.52.0