secgateway/Platform/modules/netlink_api/libnetlink_k.h

#ifndef LIBNETLINKK_K_H
#define LIBNETLINKK_K_H

#include <linux/module.h>
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/ip.h>
#include <uapi/linux/netfilter_ipv4.h>
#include <uapi/linux/ip.h>
#include <net/netlink.h>
#include <net/net_namespace.h>
#include "../../../Common/commuapinl.h"

#define NETLINK_DEBUG(debugfs_enable, ...) \
	if(DEBUGFS_PRK_ONOFF != debugfs_enable) printk(__VA_ARGS__)


struct netlinkk_cfg
{
	struct netlink_kernel_cfg cfg;
	
	struct sock *sk; //内核端socket
	int user_pid;/*用户态pid*/
	unsigned int subscriptions;/*netlink总线，netlink协议号*/
	unsigned int groups;/*netlink 组播组*/
	struct netlink_debugfs dfs;
	struct commnl_msgtype_process* msg_processer;
	int msg_processer_num;
	unsigned long debugfs_prk_enable;
};

typedef int (*commnl_doit_func)(struct sk_buff *, struct nlmsghdr *,struct netlink_ext_ack *);
typedef int (*commnl_dumpit_func)(struct sk_buff *, struct netlink_callback *,struct netlink_ext_ack *);
typedef u16 (*commnl_calcit_func)(struct sk_buff *, struct nlmsghdr *,struct netlink_ext_ack *);

struct commnl_msgtype_process
{
	int msgtype;
	commnl_doit_func doit;
	commnl_dumpit_func dumpit;
	commnl_calcit_func calcit;
	struct netlink_debugfs dfs;
};



extern void printk_mem(unsigned char * p,int len);
extern void printk_ipaddress(unsigned int address);



/****************************************************************/
/*函数功能：注册内核态配置接收消息处理函数。 */
/*输入参数：												  */
/*msgtype:注册的消息类型。*/
/*doit:对应的消息接收处理函数；*/
/*dumpit,calcit:框架预留接口，暂未使用。填NULL.*/
/*输出参数: WU */
/*返回值：0注册成功；< 0,失败											  */
/****************************************************************/
int commnl_register(struct commnl_msgtype_process *msg_handlers, int msgtype,
		    commnl_doit_func doit, commnl_dumpit_func dumpit,
		    commnl_calcit_func calcit);

int commnl_unregister(struct commnl_msgtype_process *msg_handlers, int msgtype);


/****************************************************************/
/*函数功能：在内核态创建报文上送通道，上送的 */
/*报文内容从链路层头开始。一个netlink协议号只能创建一个通道。                             */
/*输入参数：g_nlcfg                                                  */
/*输出参数: struct upmnl_handle * upmh ,存放创建的通道相关信息。*/
/*返回值：0通道创建成果；< 0,失败                                            */
/****************************************************************/
extern int libnetlinkk_init_byproto(struct netlinkk_cfg *g_nlcfg);

extern void  libnetlinkk_exit(struct netlinkk_cfg *g_nlcfg);

extern int commnl_unicast(struct sock *sk, struct sk_buff *skb, u32 portid);

extern int debugfs_pkt_num_stati(struct netlinkk_cfg *g_nlcfg, 
	struct nlmsghdr *nlh,struct netlink_ext_ack *extack);

extern int debugfs_pkt_num_stati_witisend(struct netlinkk_cfg *g_nlcfg, 
	struct nlmsghdr *nlh,struct commnl_msgtype_process* msg_process);


extern int nf_nlmsg_multicast(struct netlinkk_cfg *g_nlcfg, struct sk_buff *skb);

extern int debugfs_prk_onoff(struct netlinkk_cfg *g_nlcfg, 
	struct nlmsghdr *nlh,struct netlink_ext_ack *extack);

#endif