diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-02-14 13:02:21 +0100 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-02-17 18:23:05 +0100 |
commit | 2d5b917f8b36ea12037c51f4d12184a442a7791e (patch) | |
tree | 3d874e2744200846138c602b565cbd8947e00978 /examples | |
parent | caf2a6ad2d2229da9881733c6a5f061dbce9b45b (diff) |
examples: load ruleset from JSON
Add an example to load a ruleset file expressed in JSON.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'examples')
-rw-r--r-- | examples/Makefile.am | 3 | ||||
-rw-r--r-- | examples/json-ruleset.nft | 43 | ||||
-rw-r--r-- | examples/nft-json-file.c | 30 |
3 files changed, 75 insertions, 1 deletions
diff --git a/examples/Makefile.am b/examples/Makefile.am index dd637fe3..c972170d 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 00000000..acea1786 --- /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 00000000..0c832f22 --- /dev/null +++ b/examples/nft-json-file.c @@ -0,0 +1,30 @@ +/* gcc nft-json-file.c -o nft-json-file -lnftables */ +#include <stdlib.h> +#include <nftables/libnftables.h> + +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; +} |