typedef struct dp_conf {
	int pktint;
	int interval;
	int debug;
	int bltime;
	int queue;
	int dryrun;
} dp_conf;

typedef struct dp_accounting {
	unsigned char remoteid[256];
	int len;
	int count;
	UT_hash_handle hh;
} dp_accounting;

typedef struct dp_blacklist {
	unsigned char remoteid[256];
	int len;
	time_t expire;
	UT_hash_handle hh;
} dp_blacklist;

// global hash lists
static dp_accounting *accountings = NULL;
static dp_blacklist *blacklists = NULL;
// timestamp for cleanup interval
static time_t dp_accountingtime = 0;
static time_t dp_cleanuptime = 0;

static int dp_callback (
	struct nfq_q_handle*,
	struct nfgenmsg*,
	struct nfq_data*,
	void*);

void       dp_usage               (char*);
dp_conf   *dp_load_config         (dp_conf*, char*);
void       dp_nfq_start           (dp_conf*);
void       dp_accounting_add   (dp_conf*, unsigned char *, int);
int        dp_accounting_check (dp_conf*, unsigned char *, int);
void       dp_blacklist_add    (dp_conf*, unsigned char *, int);
int        dp_blacklist_check  (dp_conf*, unsigned char *, int);
void       dp_hash_cleanup     (dp_conf*);
void       dp_log              (unsigned char *, int, char *, ...);
int        dp_dhcp_check       (struct nfq_data*, dp_conf*);

void dp_dhcpv4_check (
	dp_conf*,
	unsigned char*,
	int,
	int,
	unsigned char**,
	int*);

void dp_dhcpv6_check (
	dp_conf*,
	unsigned char*,
	int,
	int,
	unsigned char**,
	int*);