sd-rtnl: introduce new API to set the NL header flags

By default we set as NLM_F_CREATE | NLM_F_EXCL in
sd_rtnl_message_new_link
But incase of bridge we need to set NLM_F_REQUEST | NLM_F_ACK.

If NLM_F_EXCL is set then we are unable to set the parameters. As bridge
supports setting properties after creation not during creation.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/libsystemd/sd-netlink/netlink-message.c b/src/libsystemd/sd-netlink/netlink-message.c
index 0d8e37b856..cf693de5fb 100644
--- a/src/libsystemd/sd-netlink/netlink-message.c
+++ b/src/libsystemd/sd-netlink/netlink-message.c
@@ -149,6 +149,15 @@ int sd_netlink_message_get_type(sd_netlink_message *m, uint16_t *type) {
         return 0;
 }
 
+int sd_netlink_message_set_flags(sd_netlink_message *m, uint16_t flags) {
+        assert_return(m, -EINVAL);
+        assert_return(flags, -EINVAL);
+
+        m->hdr->nlmsg_flags = flags;
+
+        return 0;
+}
+
 int sd_netlink_message_is_broadcast(sd_netlink_message *m) {
         assert_return(m, -EINVAL);