examples: add nfexp-dump-stats-cpunfct-stats

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

2 files changed, 105 insertions, 1 deletions

diff --git a/examples/netfilter/Makefile.am b/examples/netfilter/Makefile.am
index 1671d1f..b0954f6 100644
--- a/examples/netfilter/Makefile.am
+++ b/examples/netfilter/Makefile.am
@@ -5,7 +5,8 @@ check_PROGRAMS = nf-queue \
 		 nfct-event \
 		 nfct-dump-stats-cpu \
 		 nfct-counter \
-		 nfct-create-batch
+		 nfct-create-batch \
+		 nfexp-dump-stats-cpu
 
 nf_queue_SOURCES = nf-queue.c
 nf_queue_LDADD = ../../src/libmnl.la
@@ -24,3 +25,6 @@ nfct_counter_LDADD = ../../src/libmnl.la
 
 nfct_create_batch_SOURCES = nfct-create-batch.c
 nfct_create_batch_LDADD = ../../src/libmnl.la
+
+nfexp_dump_stats_cpu_SOURCES = nfexp-dump-stats-cpu.c
+nfexp_dump_stats_cpu_LDADD = ../../src/libmnl.la
diff --git a/examples/netfilter/nfexp-dump-stats-cpu.c b/examples/netfilter/nfexp-dump-stats-cpu.c
new file mode 100644
index 0000000..2ec0fb6
--- /dev/null
+++ b/examples/netfilter/nfexp-dump-stats-cpu.c
@@ -0,0 +1,100 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <arpa/inet.h>
+
+#include <linux/netfilter/nfnetlink_conntrack.h>
+#include <libmnl/libmnl.h>
+
+static int data_attr_cb(const struct nlattr *attr, void *data)
+{
+	const struct nlattr **tb = data;
+	int type = mnl_attr_get_type(attr);
+
+	if (mnl_attr_type_valid(attr, CTA_STATS_EXP_MAX) < 0)
+		return MNL_CB_OK;
+
+	if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
+		perror("mnl_attr_validate");
+		return MNL_CB_ERROR;
+	}
+
+	tb[type] = attr;
+	return MNL_CB_OK;
+}
+
+static int data_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct nlattr *tb[CTA_STATS_EXP_MAX+1] = {};
+	struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
+	int i;
+
+	mnl_attr_parse(nlh, sizeof(*nfg), data_attr_cb, tb);
+
+	for (i=0; i<CTA_STATS_EXP_MAX+1; i++) {
+		if (tb[i])
+			printf("%08x ", ntohl(mnl_attr_get_u32(tb[i])));
+	}
+
+	printf("\n");
+	return MNL_CB_OK;
+}
+
+int main(void)
+{
+	struct mnl_socket *nl;
+	struct nlmsghdr *nlh;
+	struct nfgenmsg *nfh;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	unsigned int seq, portid;
+	int ret;
+
+	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);
+
+	nlh = mnl_nlmsg_put_header(buf);
+	nlh->nlmsg_type = (NFNL_SUBSYS_CTNETLINK_EXP << 8) |
+			  IPCTNL_MSG_EXP_GET_STATS_CPU;
+	nlh->nlmsg_flags = NLM_F_REQUEST|NLM_F_DUMP;
+	nlh->nlmsg_seq = seq = time(NULL);
+
+	nfh = mnl_nlmsg_put_extra_header(nlh, sizeof(struct nfgenmsg));
+	nfh->nfgen_family = AF_INET;
+	nfh->version = NFNETLINK_V0;
+	nfh->res_id = 0;
+
+	ret = mnl_socket_sendto(nl, nlh, nlh->nlmsg_len);
+	if (ret == -1) {
+		perror("mnl_socket_recvfrom");
+		exit(EXIT_FAILURE);
+	}
+
+	/* similar output to /proc/net/stat/ip_conntrack */
+	printf("expect_new expect_create expect_delete\n");
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, seq, portid, data_cb, NULL);
+		if (ret <= MNL_CB_STOP)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		perror("mnl_socket_recvfrom");
+		exit(EXIT_FAILURE);
+	}
+
+	mnl_socket_close(nl);
+
+	return 0;
+}