From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0235BC43217 for ; Mon, 14 Feb 2022 12:16:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352797AbiBNMQf (ORCPT ); Mon, 14 Feb 2022 07:16:35 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:49524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352854AbiBNMQe (ORCPT ); Mon, 14 Feb 2022 07:16:34 -0500 Received: from mail.netfilter.org (mail.netfilter.org [217.70.188.207]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1F309488A9 for ; Mon, 14 Feb 2022 04:16:26 -0800 (PST) Received: from localhost.localdomain (unknown [78.30.32.163]) by mail.netfilter.org (Postfix) with ESMTPSA id C61EB601C1 for ; Mon, 14 Feb 2022 13:15:56 +0100 (CET) From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Subject: [PATCH nft 2/2] examples: load ruleset from JSON Date: Mon, 14 Feb 2022 13:16:13 +0100 Message-Id: <20220214121613.311530-3-pablo@netfilter.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220214121613.311530-1-pablo@netfilter.org> References: <20220214121613.311530-1-pablo@netfilter.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Add an example to load a ruleset file expressed in JSON. Signed-off-by: Pablo Neira Ayuso --- examples/Makefile.am | 3 ++- examples/json-ruleset.nft | 43 +++++++++++++++++++++++++++++++++++++++ examples/nft-json-file.c | 30 +++++++++++++++++++++++++++ 3 files changed, 75 insertions(+), 1 deletion(-) create mode 100644 examples/json-ruleset.nft create mode 100644 examples/nft-json-file.c diff --git a/examples/Makefile.am b/examples/Makefile.am index dd637fe31340..c972170d3fdc 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -1,3 +1,4 @@ -noinst_PROGRAMS = nft-buffer +noinst_PROGRAMS = nft-buffer \ + nft-json-file LDADD = $(top_builddir)/src/libnftables.la diff --git a/examples/json-ruleset.nft b/examples/json-ruleset.nft new file mode 100644 index 000000000000..acea1786649a --- /dev/null +++ b/examples/json-ruleset.nft @@ -0,0 +1,43 @@ +{ + "nftables": [ + { + "flush": { + "ruleset": { + "family": "ip" + } + } + }, + { + "table": { + "family": "ip", + "name": "x" + } + }, + { + "chain": { + "family": "ip", + "table": "x", + "name": "y", + "type": "filter", + "hook": "input", + "prio": 0, + "policy": "accept" + } + }, + { + "rule": { + "family": "ip", + "table": "x", + "chain": "y", + "expr": [ + { + "counter": { + "packets": 0, + "bytes": 0 + } + } + ] + } + } + ] +} diff --git a/examples/nft-json-file.c b/examples/nft-json-file.c new file mode 100644 index 000000000000..0c832f22e206 --- /dev/null +++ b/examples/nft-json-file.c @@ -0,0 +1,30 @@ +/* gcc nft-json-file.c -o nft-json-file -lnftables */ +#include +#include + +int main(void) +{ + struct nft_ctx *ctx; + int err; + + ctx = nft_ctx_new(0); + if (!ctx) { + perror("cannot allocate nft context"); + return EXIT_FAILURE; + } + + nft_ctx_output_set_flags(ctx, NFT_CTX_OUTPUT_JSON); + + /* create ruleset: all commands in the buffer are atomically applied */ + err = nft_run_cmd_from_filename(ctx, "json-ruleset.nft"); + if (err < 0) + fprintf(stderr, "failed to run nftables command\n"); + + err = nft_run_cmd_from_buffer(ctx, "list ruleset"); + if (err < 0) + fprintf(stderr, "failed to run nftables command\n"); + + nft_ctx_free(ctx); + + return EXIT_SUCCESS; +} -- 2.30.2