LinuxNFQueue callback function
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Iptables example code *data)
{
struct nfqnl_msg_packet_hdr *ph = NULL;
struct nlattr *attr[NFQA_MAX+1];
uint32_t id = 0;
struct nfgenmsg *nfg;
if (nfq_nlmsg_parse(nlh, attr) < 0) {
perror("problems parsing");
return MNL_CB_ERROR;
}