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-rw-r--r--examples/nft-set-elem-add.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/examples/nft-set-elem-add.c b/examples/nft-set-elem-add.c
new file mode 100644
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+++ b/examples/nft-set-elem-add.c
@@ -0,0 +1,135 @@
+/*
+ * (C) 2013 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
+ */
+
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/set.h>
+
+int main(int argc, char *argv[])
+{
+ struct mnl_socket *nl;
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ struct mnl_nlmsg_batch *batch;
+ struct nlmsghdr *nlh;
+ uint32_t portid, seq, family;
+ struct nftnl_set *s;
+ struct nftnl_set_elem *e;
+ uint16_t data;
+ int ret;
+
+ if (argc != 4) {
+ fprintf(stderr, "%s <family> <table> <set>\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ s = nftnl_set_alloc();
+ if (s == NULL) {
+ perror("OOM");
+ exit(EXIT_FAILURE);
+ }
+
+ seq = time(NULL);
+ if (strcmp(argv[1], "ip") == 0)
+ family = NFPROTO_IPV4;
+ else if (strcmp(argv[1], "ip6") == 0)
+ family = NFPROTO_IPV6;
+ else if (strcmp(argv[1], "inet") == 0)
+ family = NFPROTO_INET;
+ else if (strcmp(argv[1], "bridge") == 0)
+ family = NFPROTO_BRIDGE;
+ else if (strcmp(argv[1], "arp") == 0)
+ family = NFPROTO_ARP;
+ else {
+ fprintf(stderr, "Unknown family: ip, ip6, inet, bridge, arp\n");
+ exit(EXIT_FAILURE);
+ }
+
+ nftnl_set_set_str(s, NFTNL_SET_TABLE, argv[2]);
+ nftnl_set_set_str(s, NFTNL_SET_NAME, argv[3]);
+
+ /* Add to dummy elements to set */
+ e = nftnl_set_elem_alloc();
+ if (e == NULL) {
+ perror("OOM");
+ exit(EXIT_FAILURE);
+ }
+
+ data = 0x1;
+ nftnl_set_elem_set(e, NFTNL_SET_ELEM_KEY, &data, sizeof(data));
+ nftnl_set_elem_add(s, e);
+
+ e = nftnl_set_elem_alloc();
+ if (e == NULL) {
+ perror("OOM");
+ exit(EXIT_FAILURE);
+ }
+ data = 0x2;
+ nftnl_set_elem_set(e, NFTNL_SET_ELEM_KEY, &data, sizeof(data));
+ nftnl_set_elem_add(s, e);
+
+ batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
+
+ nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
+ mnl_nlmsg_batch_next(batch);
+
+ nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
+ NFT_MSG_NEWSETELEM, family,
+ NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK,
+ seq++);
+ nftnl_set_elems_nlmsg_build_payload(nlh, s);
+ nftnl_set_free(s);
+ mnl_nlmsg_batch_next(batch);
+
+ nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
+ mnl_nlmsg_batch_next(batch);
+
+ nl = mnl_socket_open(NETLINK_NETFILTER);
+ if (nl == NULL) {
+ perror("mnl_socket_open");
+ exit(EXIT_FAILURE);
+ }
+
+ if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+ perror("mnl_socket_bind");
+ exit(EXIT_FAILURE);
+ }
+ portid = mnl_socket_get_portid(nl);
+
+ if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
+ mnl_nlmsg_batch_size(batch)) < 0) {
+ perror("mnl_socket_send");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_nlmsg_batch_stop(batch);
+
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ while (ret > 0) {
+ ret = mnl_cb_run(buf, ret, 0, portid, NULL, NULL);
+ if (ret <= 0)
+ break;
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ }
+ if (ret == -1) {
+ perror("error");
+ exit(EXIT_FAILURE);
+ }
+ mnl_socket_close(nl);
+
+ return EXIT_SUCCESS;
+}