Add an example to load a ruleset file expressed in JSON.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
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 <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;
+}
--
2.30.2
