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/* 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;
}
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