sudo nft add element ip table-test table-set '{ 127.0.1.3 }'
sudo nft add table ip table-test
sudo nft add set ip table-test table-set '{ type ipv4_addr; comment "drop all packets from these hosts"; }'
sudo nft list set ip table-test table-set
sudo nft flush set ip table-test table-set


14619 sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, 
msg_iov=[{iov_base=[[{nlmsg_len=20, nlmsg_type=NFNL_MSG_BATCH_BEGIN, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}, 
{nfgen_family=AF_UNSPEC, version=NFNETLINK_V0, res_id=htons(10)}], 
[
    {
        nlmsg_len=72, 
        nlmsg_type=NFNL_SUBSYS_NFTABLES<<8|NFT_MSG_NEWSETELEM, 
        nlmsg_flags=NLM_F_REQUEST|NLM_F_CREATE, 
        nlmsg_seq=1, 
        nlmsg_pid=0
    }, 
    {
        nfgen_family=AF_INET, 
        version=NFNETLINK_V0, 
        res_id=htons(0)
    }, 
    [
        [
            {nla_len=11, nla_type=0x1}, 
            "\x66\x69\x6c\x74\x65\x72\x00"
        ], 
        [
            {nla_len=9, nla_type=0x2}, 
            "\x74\x65\x73\x74\x00"
        ], 
        [
            {nla_len=8, nla_type=0x4}, 
            "\x00\x00\x00\x01"
        ], 
        [
            {nla_len=20, nla_type=NLA_F_NESTED|0x3}, 
            "\x10\x00\x01\x80\x0c\x00\x01\x80\x08\x00\x01\x00\x7f\x00\x01\x04"]
        ]
    ], 
    [
        {nlmsg_len=20, nlmsg_type=NFNL_MSG_BATCH_END, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=2, nlmsg_pid=0}, {nfgen_family=AF_UNSPEC, version=NFNETLINK_V0, res_id=htons(10)}]], iov_len=112}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 112

nlmsghdr:
14 00 00 00  nlmsg_len 20
10 00 nlmsg_type NLMSG_MIN_TYPE 10
01 00  nlmsg_flags NLM_F_REQUEST 1
BC 55 AF 0D  nlmsg_seq random
00 00 00 00 nlmsg_pid 0

nfgenmsg:
00 
00 
00 0A 

nlmsghdr:
28 00 00 00
0C 0A 
05 06 
BD 55 AF 0D 
00 00 00 00 

nfgenmsg:
02 
00 
00 00 

nlattr
14 00 = 20
03 80 
10 00 00 80 0C 00 01 80 08 00 01 00 7F 00 01 01 14 00 00 00 

11 00 
01 00 
BE 55 AF 0D 00 00 00 00 00 00 00 0A 
 --- EOF

struct nfgenmsg {
	__u8  nfgen_family;		/* AF_xxx */
	__u8  version;		/* nfnetlink version */
	__be16    res_id;		/* resource id */
};
