summaryrefslogtreecommitdiffstats
path: root/examples/rtnl/rtnl-link-set.c
diff options
context:
space:
mode:
Diffstat (limited to 'examples/rtnl/rtnl-link-set.c')
-rw-r--r--examples/rtnl/rtnl-link-set.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/examples/rtnl/rtnl-link-set.c b/examples/rtnl/rtnl-link-set.c
new file mode 100644
index 0000000..d5cf9b1
--- /dev/null
+++ b/examples/rtnl/rtnl-link-set.c
@@ -0,0 +1,88 @@
+/*
+ * (C) 2009-2010 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <time.h>
+
+#include <libmnl/libmnl.h>
+#include <linux/if.h>
+#include <linux/if_link.h>
+#include <linux/rtnetlink.h>
+
+int main(int argc, char *argv[])
+{
+ struct mnl_socket *nl;
+ char buf[getpagesize()];
+ struct nlmsghdr *nlh;
+ struct ifinfomsg *ifm;
+ int ret;
+ unsigned int seq, portid, change = 0, flags = 0;
+
+ if (argc != 3) {
+ printf("Usage: %s [ifname] [up|down]\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ if (strncasecmp(argv[2], "up", strlen("up")) == 0) {
+ change |= IFF_UP;
+ flags |= IFF_UP;
+ } else if (strncasecmp(argv[2], "down", strlen("down")) == 0) {
+ change |= IFF_UP;
+ flags &= ~IFF_UP;
+ } else {
+ fprintf(stderr, "%s is not `up' nor `down'\n", argv[2]);
+ exit(EXIT_FAILURE);
+ }
+
+ nlh = mnl_nlmsg_put_header(buf);
+ nlh->nlmsg_type = RTM_NEWLINK;
+ nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ nlh->nlmsg_seq = seq = time(NULL);
+ ifm = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifm));
+ ifm->ifi_family = AF_UNSPEC;
+ ifm->ifi_change = change;
+ ifm->ifi_flags = flags;
+
+ mnl_attr_put_str(nlh, IFLA_IFNAME, argv[1]);
+
+ 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);
+ }
+ portid = mnl_socket_get_portid(nl);
+
+ mnl_nlmsg_fprintf(stdout, nlh);
+
+ if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+ perror("mnl_socket_send");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ if (ret == -1) {
+ perror("read");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL);
+ if (ret == -1){
+ perror("callback");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_socket_close(nl);
+
+ return 0;
+}