pfwall_public.h

/*
Code shared between both kernel space and userspace including admin module are defined here
*/

#ifndef __PF_PUBLIC_H__
#define __PF_PUBLIC_H__

#include <linux/types.h>

struct PF_rule {
	__u8    direction;  // 0: ALL. 1: IN. 2: OUT.
	__u8    proto;      // 0: ALL. 1: TCP. 2: UDP.
	__u32   srcip;      // Source IP address. 
	__u32   dstip;      // Destination IP address.
	__u16   srcport;    // Source port number.
	__u16   dstport;    // Destination port number.
	__u8    action;     // 0: DROP. 1: LOG. 
	__u32   index;      // Rule index. Must be > 0
	
// For rules list in module.
#ifdef PF_KERNELSPACE
	struct list_head list;
#endif
};

// Command values: Add rule, Delete rule, Flush rules etc,
enum {
	CMD_ADD = 0,
	CMD_DEL,
	CMD_FLUSH,
	CMD_MAX
};

// Action values: Drop, Pass, Log etc,.
enum {
	ACT_DROP = 0,
	ACT_PASS,
	ACT_LOG,
	ACT_MAX
};

// Traffic direction: All (Both), In or Out.
enum {
	DIRECTION_ALL = 0,
	DIRECTION_IN,
	DIRECTION_OUT,
	DIRECTION_MAX
};

// Network protocol: All, TCP, UDP etc,.
enum {
	PROTO_ALL = 0,
	PROTO_TCP,
	PROTO_UDP,
	PROTO_MAX
};

// Max network port value 
#define PORT_MAX 65535

// Command strings
#define CMD_ADD_STR "ADD"
#define CMD_DEL_STR "DELETE"
#define CMD_FLUSH_STR "FLUSH"

// Action strings
#define ACT_DROP_STR "DROP"
#define ACT_PASS_STR "PASS"
#define ACT_LOG_STR "LOG"

// Direction strings
#define DIRECTION_ALL_STR "ALL"
#define DIRECTION_IN_STR "IN"
#define DIRECTION_OUT_STR "OUT"

// Protocol strings
#define PROTO_ALL_STR "ALL"
#define PROTO_TCP_STR "TCP"
#define PROTO_UDP_STR "UDP"

// Function prototypes
char* cmd_to_str(int cmd);

char* action_to_str(int action);

char* direction_to_str(int direction);

char* proto_to_str(int proto);

#endif