Create an example folder to add example source code files to show how to
use libnftables. Add first example program using the buffer API.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
configure.ac | 1 +
examples/Makefile.am | 3 +++
examples/nft-buffer.c | 34 ++++++++++++++++++++++++++++++++++
3 files changed, 38 insertions(+)
create mode 100644 examples/Makefile.am
create mode 100644 examples/nft-buffer.c
diff --git a/configure.ac b/configure.ac
index 503883f28c66..d321c960562b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -145,6 +145,7 @@ AC_CONFIG_FILES([ \
files/osf/Makefile \
doc/Makefile \
py/Makefile \
+ examples/Makefile \
])
AC_OUTPUT
diff --git a/examples/Makefile.am b/examples/Makefile.am
new file mode 100644
index 000000000000..dd637fe31340
--- /dev/null
+++ b/examples/Makefile.am
@@ -0,0 +1,3 @@
+noinst_PROGRAMS = nft-buffer
+
+LDADD = $(top_builddir)/src/libnftables.la
diff --git a/examples/nft-buffer.c b/examples/nft-buffer.c
new file mode 100644
index 000000000000..1c4b1e041d75
--- /dev/null
+++ b/examples/nft-buffer.c
@@ -0,0 +1,34 @@
+/* gcc nft-buffer.c -o nft-buffer -lnftables */
+#include <stdlib.h>
+#include <nftables/libnftables.h>
+
+const char ruleset[] =
+ "flush ruleset;"
+ "add table x;"
+ "add chain x y { type filter hook input priority 0; };"
+ "add rule x y counter;";
+
+int main(void)
+{
+ struct nft_ctx *ctx;
+ int err;
+
+ ctx = nft_ctx_new(0);
+ if (!ctx) {
+ perror("cannot allocate nft context");
+ return EXIT_FAILURE;
+ }
+
+ /* create ruleset: all commands in the buffer are atomically applied */
+ err = nft_run_cmd_from_buffer(ctx, ruleset);
+ 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
