sd-netlink: introduce api for new NL type NLA_FLAG

2 files changed, 19 insertions, 0 deletions

diff --git a/src/libsystemd/sd-netlink/netlink-message.c b/src/libsystemd/sd-netlink/netlink-message.c
index b0ed2f2882..3ba62a6be9 100644
--- a/src/libsystemd/sd-netlink/netlink-message.c
+++ b/src/libsystemd/sd-netlink/netlink-message.c
@@ -262,6 +262,24 @@ int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type,
         return 0;
 }
 
+int sd_netlink_message_append_flag(sd_netlink_message *m, unsigned short type) {
+        size_t size;
+        int r;
+
+        assert_return(m, -EINVAL);
+        assert_return(!m->sealed, -EPERM);
+
+        r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_FLAG);
+        if (r < 0)
+                return r;
+
+        r = add_rtattr(m, type, NULL, 0);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
 int sd_netlink_message_append_u8(sd_netlink_message *m, unsigned short type, uint8_t data) {
         int r;
 
diff --git a/src/systemd/sd-netlink.h b/src/systemd/sd-netlink.h
index 24a9ed8e77..cb462bf48f 100644
--- a/src/systemd/sd-netlink.h
+++ b/src/systemd/sd-netlink.h
@@ -69,6 +69,7 @@ int sd_netlink_attach_event(sd_netlink *nl, sd_event *e, int priority);
 int sd_netlink_detach_event(sd_netlink *nl);
 
 int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type, const char *data);
+int sd_netlink_message_append_flag(sd_netlink_message *m, unsigned short type);
 int sd_netlink_message_append_u8(sd_netlink_message *m, unsigned short type, uint8_t data);
 int sd_netlink_message_append_u16(sd_netlink_message *m, unsigned short type, uint16_t data);
 int sd_netlink_message_append_u32(sd_netlink_message *m, unsigned short type, uint32_t data);