/* * This is a module which is used for queueing IPv4 packets and * communicating with userspace via netlink. * * (C) 2000 James Morris, this code is GPL. */#ifndef _IP_QUEUE_H#define _IP_QUEUE_H#include <linux/module.h>#include <linux/skbuff.h>#include <linux/init.h>#include <linux/ip.h>#include <linux/notifier.h>#include <linux/netdevice.h>#include <linux/netfilter.h>#include <linux/spinlock.h>#include <linux/rtnetlink.h>#include <linux/sysctl.h>#include <linux/proc_fs.h>#include <net/route.h>#include <net/sock.h>#include <linux/netfilter_ipv4/ip_tables.h>#ifdef __KERNEL__#ifdef DEBUG_IPQ#define QDEBUG(x...) printk(KERN_DEBUG ## x)#else#define QDEBUG(x...)#endif  /* DEBUG_IPQ */#else#include <net/if.h>#endif	/* ! __KERNEL__ *//* Messages sent from kernel */typedef struct ipq_packet_msg {    unsigned long packet_id;	/* ID of queued packet */    unsigned long mark;		/* Netfilter mark value */    long timestamp_sec;		/* Packet arrival time (seconds) */    long timestamp_usec;		/* Packet arrvial time (+useconds) */    unsigned int hook;		/* Netfilter hook we rode in on */    char indev_name[IFNAMSIZ];	/* Name of incoming interface */    char outdev_name[IFNAMSIZ];	/* Name of outgoing interface */    unsigned short hw_protocol;	/* Hardware protocol (network order) */    unsigned short hw_type;		/* Hardware type */    unsigned char hw_addrlen;	/* Hardware address length */    unsigned char hw_addr[8];	/* Hardware address */    size_t data_len;		/* Length of packet data */    unsigned char payload[0];	/* Optional packet data */} ipq_packet_msg_t;/* Messages sent from userspace */typedef struct ipq_mode_msg {    unsigned char value;		/* Requested mode */    size_t range;			/* Optional range of packet requested */} ipq_mode_msg_t;typedef struct ipq_verdict_msg {    unsigned int value;		/* Verdict to hand to netfilter */    unsigned long id;		/* Packet ID for this verdict */    size_t data_len;		/* Length of replacement data */    unsigned char payload[0];	/* Optional replacement packet */} ipq_verdict_msg_t;#define IPQ_COPY_MAX IPQ_COPY_PACKETvoid ipq_send_ip(u_int32_t ip);void ipq_drop_ip(u_int32_t ip);int ipq_insert_packet(struct sk_buff *skb,struct nf_info *info);int init_packet_queue(void);void cleanup_packet_queue(void);#endif /*_IP_QUEUE_H*/