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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-set.c
initial libmnl import
Diffstat (limited to 'examples/rtnl-link-set.c')
-rw-r--r--examples/rtnl-link-set.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/examples/rtnl-link-set.c b/examples/rtnl-link-set.c
new file mode 100644
index 0000000..36bf355
--- /dev/null
+++ b/examples/rtnl-link-set.c
@@ -0,0 +1,76 @@
+#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>
+
+int main(int argc, char *argv[])
+{
+ struct mnl_socket *nl;
+ char buf[getpagesize()];
+ struct nlmsghdr *nlh;
+ struct ifinfomsg *ifm;
+ int ret;
+ unsigned int seq, oper;
+
+ if (argc != 3) {
+ printf("Usage: %s [ifname] [up|down]\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ if (strncasecmp(argv[2], "up") == 0)
+ oper = IF_OPER_UP;
+ else if (strncasecmp(argv[2], "down") == 0)
+ oper = IF_OPER_DOWN;
+ 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_SETLINK;
+ 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_PACKET;
+
+ mnl_attr_put_u8(nlh, IFLA_OPERSTATE, oper);
+ 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);
+ }
+
+ mnl_nlmsg_print(nlh);
+
+ 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));
+ if (ret == -1) {
+ perror("read");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = mnl_cb_run(buf, ret, seq, NULL, NULL);
+ if (ret == -1){
+ perror("callback");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_socket_close(nl);
+
+ return 0;
+}