From 74e7bb8b033640f7c4692c4ea0d5c231e3137b7b Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri, 19 Mar 2010 14:55:32 +0100
Subject: initial libmnl import

---
 examples/rtnl-link-dump.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 examples/rtnl-link-dump.c

(limited to 'examples/rtnl-link-dump.c')

diff --git a/examples/rtnl-link-dump.c b/examples/rtnl-link-dump.c
new file mode 100644
index 0000000..7cf061d
--- /dev/null
+++ b/examples/rtnl-link-dump.c
@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libmnl/libmnl.h>
+#include <linux/if.h>
+#include <linux/if_link.h>
+#include <linux/rtnetlink.h>
+
+static int data_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct nlattr *tb[IFLA_MAX+1];
+	struct ifinfomsg *ifm = mnl_nlmsg_get_data(nlh);
+	int len = mnl_nlmsg_get_len(nlh);
+	struct nlattr *attr;
+
+	printf("index=%d type=%d flags=%d family=%d ", 
+		ifm->ifi_index, ifm->ifi_type,
+		ifm->ifi_flags, ifm->ifi_family);
+
+	if (ifm->ifi_flags & IFF_RUNNING)
+		printf("[RUNNING] ");
+	else
+		printf("[NOT RUNNING] ");
+
+	mnl_attr_parse_at_offset(nlh, sizeof(*ifm), tb, IFLA_MAX);
+	if (tb[IFLA_MTU]) {
+		printf("mtu=%d ", mnl_attr_get_u32(tb[IFLA_MTU]));
+	}
+	if (tb[IFLA_IFNAME]) {
+		printf("name=%s", mnl_attr_get_str(tb[IFLA_IFNAME]));
+	}
+	printf("\n");
+	return MNL_CB_OK;
+}
+
+int main()
+{
+	struct mnl_socket *nl;
+	char buf[getpagesize()];
+	struct nlmsghdr *nlh;
+	struct rtgenmsg *rt;
+	int ret;
+	unsigned int seq;
+
+	nlh = mnl_nlmsg_put_header(buf);
+	nlh->nlmsg_type	= RTM_GETLINK;
+	nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
+	nlh->nlmsg_seq = seq = time(NULL);
+	rt = mnl_nlmsg_put_extra_header(nlh, sizeof(struct rtgenmsg));
+	rt->rtgen_family = AF_PACKET;
+
+	nl = mnl_socket_open(NETLINK_ROUTE);
+	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);
+	}
+
+	if (mnl_socket_sendto(nl, nlh, mnl_nlmsg_get_len(nlh)) < 0) {
+		perror("mnl_socket_send");
+		exit(EXIT_FAILURE);
+	}
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, seq, data_cb, NULL);
+		if (ret <= MNL_CB_STOP)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		perror("error");
+		exit(EXIT_FAILURE);
+	}
+
+	mnl_socket_close(nl);
+
+	return 0;
+}
-- 
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