about netlink message handle in netifd

[lin jia]

hi  all

      In netifd,  the netlink message handle "handler_nl_event"  only deal with one message at one time ,

      if (!u->error) {
            nl_recvmsgs_default(ev->sock);
            return;
      }

             which may cause netlink buffer overflow frequently,    can we modify it to 


if (!u->error) {
        int counts = 0;
        struct pollfd pfd = {
                .fd = ev->uloop.fd,
                .events = POLLIN,
        };
 
        while(poll(&pfd, 1, 0)>0){
            nl_recvmsgs_default(ev->sock);
            counts++;
        }
 
        netifd_log_message(L_NOTICE, "%s %d counts %d msg done\n", __func__, __LINE__, counts);
 
        //nl_recvmsgs_default(ev->sock);
        return;
}


to deal more netlink message as much as it can