NLM_F_REQUEST
req_hdr->nlmsg_flags = flags | NLM_F_REQUEST;
nw.hdr->nlmsg_flags = NLM_F_REQUEST;
if (hdr->nlmsg_flags & NLM_F_REQUEST &&
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
hdr->nlmsg_flags |= (NLM_F_CREATE | NLM_F_EXCL | NLM_F_REQUEST | NLM_F_ACK);
hdr->nlmsg_flags |= (NLM_F_ACK | NLM_F_REQUEST);
.hdr.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
.hdr.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,