network: address: read flags from message header when IFA_FLAGS is not supported by kernel

Follow-up for 0828a38605. Fixes #21670.
2021-12-08 05:40:09 +09:00
parent f14a6e7f48
commit 8ed68422e1
1 changed files with 8 additions and 0 deletions
@@ -1314,6 +1314,14 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message,
        }

        r = sd_netlink_message_read_u32(message, IFA_FLAGS, &tmp->flags);
+        if (r == -ENODATA) {
+                unsigned char flags;
+
+                /* For old kernels. */
+                r = sd_rtnl_message_addr_get_flags(message, &flags);
+                if (r >= 0)
+                        tmp->flags = flags;
+        }
        if (r < 0) {
                log_link_warning_errno(link, r, "rtnl: received address message without flags, ignoring: %m");
                return 0;