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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-09 13:04:34 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-09 13:04:34 +0000
commit371c8a8bca2b6862226bc79c13d143e07c1d8fc3 (patch)
tree06c7dc8826596690422e79d5bde2f46c90492de3 /examples/nft-map-add.c
parentInitial commit. (diff)
downloadlibnftnl-upstream/1.2.6.tar.xz
libnftnl-upstream/1.2.6.zip
Adding upstream version 1.2.6.upstream/1.2.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--examples/nft-map-add.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/examples/nft-map-add.c b/examples/nft-map-add.c
new file mode 100644
index 0000000..e5ce664
--- /dev/null
+++ b/examples/nft-map-add.c
@@ -0,0 +1,141 @@
+/*
+ * (C) 2016 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.
+ */
+
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <stddef.h> /* for offsetof */
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <errno.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/set.h>
+
+static struct nftnl_set *setup_set(uint8_t family, const char *table,
+ const char *name)
+{
+ struct nftnl_set *s = NULL;
+
+ s = nftnl_set_alloc();
+ if (s == NULL) {
+ perror("OOM");
+ exit(EXIT_FAILURE);
+ }
+
+ nftnl_set_set_str(s, NFTNL_SET_TABLE, table);
+ nftnl_set_set_str(s, NFTNL_SET_NAME, name);
+ nftnl_set_set_u32(s, NFTNL_SET_FAMILY, family);
+ nftnl_set_set_u32(s, NFTNL_SET_KEY_LEN, 2);
+ /* See nftables/include/datatype.h, where TYPE_INET_SERVICE is 13. We
+ * should place these datatypes in a public header so third party
+ * applications still work with nftables.
+ */
+ nftnl_set_set_u32(s, NFTNL_SET_KEY_TYPE, 13);
+ nftnl_set_set_u32(s, NFTNL_SET_DATA_LEN, 2);
+ nftnl_set_set_u32(s, NFTNL_SET_DATA_TYPE, 13);
+ nftnl_set_set_u32(s, NFTNL_SET_ID, 1);
+ nftnl_set_set_u32(s, NFTNL_SET_FLAGS, NFT_SET_CONSTANT | NFT_SET_MAP);
+
+ return s;
+}
+
+int main(int argc, char *argv[])
+{
+ struct mnl_socket *nl;
+ struct nftnl_set *s;
+ struct nlmsghdr *nlh;
+ struct mnl_nlmsg_batch *batch;
+ uint8_t family;
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ uint32_t seq = time(NULL);
+ int ret;
+
+ if (argc != 4) {
+ fprintf(stderr, "Usage: %s <family> <table> <setname>\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ 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, bridge, arp\n");
+ exit(EXIT_FAILURE);
+ }
+
+ s = setup_set(family, argv[2], argv[3]);
+
+ 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);
+ }
+
+ 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_NEWSET, family,
+ NLM_F_CREATE | NLM_F_ACK, seq++);
+
+ nftnl_set_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);
+
+ ret = mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
+ mnl_nlmsg_batch_size(batch));
+ if (ret == -1) {
+ perror("mnl_socket_sendto");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_nlmsg_batch_stop(batch);
+
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ if (ret == -1) {
+ perror("mnl_socket_recvfrom");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = mnl_cb_run(buf, ret, 0, mnl_socket_get_portid(nl), NULL, NULL);
+ if (ret < 0) {
+ perror("mnl_cb_run");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_socket_close(nl);
+
+ return EXIT_SUCCESS;
+}