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authorPablo Neira Ayuso <pablo@netfilter.org>2010-03-19 14:55:32 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2010-03-19 14:55:32 +0100
commit74e7bb8b033640f7c4692c4ea0d5c231e3137b7b (patch)
tree4cc2125d00b83b5ac1b076da2c8e3eff7b08ddc3 /examples/rtnl-link-event.c
initial libmnl import
Diffstat (limited to 'examples/rtnl-link-event.c')
-rw-r--r--examples/rtnl-link-event.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/examples/rtnl-link-event.c b/examples/rtnl-link-event.c
new file mode 100644
index 0000000..ed5a577
--- /dev/null
+++ b/examples/rtnl-link-event.c
@@ -0,0 +1,70 @@
+#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 nlmsghdr *) buf;
+ int ret;
+
+ nl = mnl_socket_open(NETLINK_ROUTE);
+ if (nl == NULL) {
+ perror("mnl_socket_open");
+ exit(EXIT_FAILURE);
+ }
+
+ if (mnl_socket_bind(nl, RTMGRP_LINK, MNL_SOCKET_AUTOPID) < 0) {
+ perror("mnl_socket_bind");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ while (ret > 0) {
+ ret = mnl_cb_run(buf, ret, 0, data_cb, 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 0;
+}