From nobody Fri Oct 3 06:37:11 2025 Received: from mail1.fiberby.net (mail1.fiberby.net [193.104.135.124]) (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 26E2A2DE6FA; Thu, 4 Sep 2025 22:03:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.104.135.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757023411; cv=none; b=VC27VrXnySinll455Bd+sYezG6RWCLqusr2/+2nFz7g85+M56yuETNQ9n5wFuyGShZQkMRjrXcAx17iaJobfRx0C7BKzWLOqXEEdbRrxJi6PvZ/f7cyceck4czdWeTICRLmddLORkvUtyvjU0zHA8Dkqh1uZBLUdv81phDaDQkE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757023411; c=relaxed/simple; bh=oSNm5eg5gYI2AKFp3yCBDv0gEfrms2mI0sAqlg7aafw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=JHs/Fn7XtRdDegB7CAmtiT6T/CJAMJe2A180E7VfmtSb/q1KIiIvrKQ4hswxuW8vMAsNEYBw1woPcUvPt3c9LmxfWYU8GakhZAUJgGgYYlswYuFEUUYl34V7t/IULIPORBt/reda3Ikw/QsCmeqeJG2X1HITWbqle868inrrAsI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fiberby.net; spf=pass smtp.mailfrom=fiberby.net; dkim=pass (2048-bit key) header.d=fiberby.net header.i=@fiberby.net header.b=fHcq7dvZ; arc=none smtp.client-ip=193.104.135.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fiberby.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fiberby.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fiberby.net header.i=@fiberby.net header.b="fHcq7dvZ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=fiberby.net; s=202008; t=1757023398; bh=oSNm5eg5gYI2AKFp3yCBDv0gEfrms2mI0sAqlg7aafw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fHcq7dvZI6pvfn8YL/iDtqOpQcwj+xwC5DO1di5HGCXTjbl78kQhVe0DNSZMfwjKq VRdyUOTMBDLGqCY9EvGXVi9Jx+alo7VSBMaFNyjoeNpsznTLk/3hh3X2+1wtxlKcs3 LRD8A66nzCJDkDXfWLGVAmAk5ZHGrTccrGbEzlgqte93tBB6KV5eIGW7m4Z6XPwYAB dlTpayTugJX9t+AeKLLYc5mkl9wfAZByXV17/RIUIQ19TFrAwtUiuaFjAGxU1M6tXr eHcBH5VVnGV0+ao/HkMZSnCiWcv2oYOsIRyDJoddw1pCGYw+NcIFiO17xs8CLIYPD7 lPUUD1QZbIsYg== Received: from x201s (193-104-135-243.ip4.fiberby.net [193.104.135.243]) by mail1.fiberby.net (Postfix) with ESMTPSA id 4F3066013A; Thu, 4 Sep 2025 22:03:18 +0000 (UTC) Received: by x201s (Postfix, from userid 1000) id BFE61202B39; Thu, 04 Sep 2025 22:02:58 +0000 (UTC) From: =?UTF-8?q?Asbj=C3=B8rn=20Sloth=20T=C3=B8nnesen?= To: "Jason A. Donenfeld" , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: =?UTF-8?q?Asbj=C3=B8rn=20Sloth=20T=C3=B8nnesen?= , Donald Hunter , Simon Horman , Jacob Keller , Andrew Lunn , wireguard@lists.zx2c4.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC net-next 14/14] tools: ynl: add sample for wireguard Date: Thu, 4 Sep 2025 22:02:48 +0000 Message-ID: <20250904220255.1006675-14-ast@fiberby.net> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250904-wg-ynl-rfc@fiberby.net> References: <20250904-wg-ynl-rfc@fiberby.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Add a sample application using the generated C library. Example: [install uapi headers, then] $ make -C tools/net/ynl/lib $ make -C tools/net/ynl/generated $ make -C tools/net/ynl/samples wireguard $ ./tools/net/ynl/samples/wireguard usage: ./tools/net/ynl/samples/wireguard $ sudo ./tools/net/ynl/samples/wireguard wg-test Interface 3: wg-test Peer 6adfb183a4a2c94a2f92dab5ade762a4788[...]: Data: rx: 42 / tx: 42 bytes Allowed IPs: 0.0.0.0/0 ::/0 Signed-off-by: Asbj=C3=B8rn Sloth T=C3=B8nnesen --- MAINTAINERS | 1 + tools/net/ynl/samples/.gitignore | 1 + tools/net/ynl/samples/wireguard.c | 104 ++++++++++++++++++++++++++++++ 3 files changed, 106 insertions(+) create mode 100644 tools/net/ynl/samples/wireguard.c diff --git a/MAINTAINERS b/MAINTAINERS index e8360e4b55c6..dafc374b25d0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -27171,6 +27171,7 @@ S: Maintained F: Documentation/netlink/specs/wireguard.yaml F: drivers/net/wireguard/ F: include/uapi/linux/wireguard_params.h +F: tools/net/ynl/samples/wireguard.c F: tools/testing/selftests/wireguard/ =20 WISTRON LAPTOP BUTTON DRIVER diff --git a/tools/net/ynl/samples/.gitignore b/tools/net/ynl/samples/.giti= gnore index 7f5fca7682d7..09c61e4c18cd 100644 --- a/tools/net/ynl/samples/.gitignore +++ b/tools/net/ynl/samples/.gitignore @@ -7,3 +7,4 @@ rt-addr rt-link rt-route tc +wireguard diff --git a/tools/net/ynl/samples/wireguard.c b/tools/net/ynl/samples/wire= guard.c new file mode 100644 index 000000000000..f1549e585949 --- /dev/null +++ b/tools/net/ynl/samples/wireguard.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include + +#include "wireguard-user.h" + +static void print_allowed_ip(const struct wireguard_wgallowedip *aip) +{ + char addr_out[INET6_ADDRSTRLEN]; + + if (!inet_ntop(aip->family, aip->ipaddr, addr_out, sizeof(addr_out))) { + addr_out[0] =3D '?'; + addr_out[1] =3D '\0'; + } + printf("\t\t\t%s/%u\n", addr_out, aip->cidr_mask); +} + +/* Only printing public key in this demo. For better key formatting, + * use constant-time implementation as found in wireguard-tools. + */ +static void print_peer_header(const struct wireguard_wgpeer *peer) +{ + unsigned int i; + uint8_t *key =3D peer->public_key; + unsigned int len =3D peer->_len.public_key; + + if (len !=3D 32) + return; + printf("\tPeer "); + for (i =3D 0; i < len; i++) + printf("%02x", key[i]); + printf(":\n"); +} + +static void print_peer(const struct wireguard_wgpeer *peer) +{ + unsigned int i; + + print_peer_header(peer); + printf("\t\tData: rx: %llu / tx: %llu bytes\n", + peer->rx_bytes, peer->tx_bytes); + printf("\t\tAllowed IPs:\n"); + for (i =3D 0; i < peer->_count.allowedips; i++) + print_allowed_ip(&peer->allowedips[i]); +} + +static void build_request(struct wireguard_get_device_req *req, char *arg) +{ + char *endptr; + int ifindex; + + ifindex =3D strtol(arg, &endptr, 0); + if (endptr !=3D arg + strlen(arg) || errno !=3D 0) + ifindex =3D 0; + if (ifindex > 0) + wireguard_get_device_req_set_ifindex(req, ifindex); + else + wireguard_get_device_req_set_ifname(req, arg); +} + +int main(int argc, char **argv) +{ + struct wireguard_get_device_list *devs; + struct wireguard_get_device_req *req; + struct ynl_sock *ys; + + if (argc < 2) { + fprintf(stderr, "usage: %s \n", argv[0]); + return 1; + } + + req =3D wireguard_get_device_req_alloc(); + build_request(req, argv[1]); + + ys =3D ynl_sock_create(&ynl_wireguard_family, NULL); + if (!ys) + return 2; + + devs =3D wireguard_get_device_dump(ys, req); + if (!devs) + goto err_close; + + ynl_dump_foreach(devs, d) { + unsigned int i; + + printf("Interface %d: %s\n", d->ifindex, d->ifname); + for (i =3D 0; i < d->_count.peers; i++) + print_peer(&d->peers[i]); + } + wireguard_get_device_list_free(devs); + wireguard_get_device_req_free(req); + ynl_sock_destroy(ys); + + return 0; + +err_close: + fprintf(stderr, "YNL (%d): %s\n", ys->err.code, ys->err.msg); + wireguard_get_device_req_free(req); + ynl_sock_destroy(ys); + return 3; +} --=20 2.51.0