From: David Ahern <dsah...@gmail.com>
groups > 31 have to be joined using the setsockopt. Since the nexthop
group is 32, add a helper to allow 'ip monitor' to listen for nexthop
messages.
Signed-off-by: David Ahern <dsah...@gmail.com>
---
include/libnetlink.h | 3 ++-
lib/libnetlink.c | 6 ++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/libnetlink.h b/include/libnetlink.h
index 503b3ec11bb6..599b2c592f68 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -45,7 +45,8 @@ int rtnl_open(struct rtnl_handle *rth, unsigned int
subscriptions)
int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
int protocol)
__attribute__((warn_unused_result));
-
+int rtnl_add_nl_group(struct rtnl_handle *rth, unsigned int group)
+ __attribute__((warn_unused_result));
void rtnl_close(struct rtnl_handle *rth);
void rtnl_set_strict_dump(struct rtnl_handle *rth);
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 6ae51a9dba14..eb85bbdf01ee 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -173,6 +173,12 @@ void rtnl_set_strict_dump(struct rtnl_handle *rth)
rth->flags |= RTNL_HANDLE_F_STRICT_CHK;
}
+int rtnl_add_nl_group(struct rtnl_handle *rth, unsigned int group)
+{
+ return setsockopt(rth->fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP,
+ &group, sizeof(group));
+}
+
void rtnl_close(struct rtnl_handle *rth)
{
if (rth->fd >= 0) {
--
2.11.0
