ip neigh: Add support for filtering dumps by master device
Add support for filtering neighbor dumps by master device. Kernel side
support provided by commit 21fdd092acc7. Since the feature is not
available in older kernels the user is given a warning message if the
kernel does not support the request.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 46cac34..8e3762c 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -191,6 +191,27 @@
return sendmsg(rth->fd, &msg, 0);
}
+int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n)
+{
+ struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
+ struct iovec iov = {
+ .iov_base = (void*) n,
+ .iov_len = n->nlmsg_len
+ };
+ struct msghdr msg = {
+ .msg_name = &nladdr,
+ .msg_namelen = sizeof(nladdr),
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ };
+
+ n->nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST;
+ n->nlmsg_pid = 0;
+ n->nlmsg_seq = rth->dump = ++rth->seq;
+
+ return sendmsg(rth->fd, &msg, 0);
+}
+
int rtnl_dump_filter_l(struct rtnl_handle *rth,
const struct rtnl_dump_filter_arg *arg)
{