76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
/*
|
|
* Copyright (c) 1993 Daniel Boulet
|
|
* Copyright (c) 1994 Ugen J.S.Antsilevich
|
|
*
|
|
* Redistribution and use in source forms, with and without modification,
|
|
* are permitted provided that this entire comment appears intact.
|
|
*
|
|
* Redistribution in binary form may occur without any restrictions.
|
|
* Obviously, it would be nice if you gave credit where credit is due
|
|
* but requiring it would be too onerous.
|
|
*
|
|
* This software is provided ``AS IS'' without any warranties of any kind.
|
|
*/
|
|
|
|
/*
|
|
* Format of an IP firewall descriptor
|
|
*
|
|
* src, dst, src_mask, dst_mask are always stored in network byte order.
|
|
* flags and num_*_ports are stored in host byte order (of course).
|
|
* Port numbers are stored in HOST byte order.
|
|
*/
|
|
#ifndef _IP_FW_H
|
|
#define _IP_FW_H
|
|
|
|
struct ip_firewall {
|
|
struct ip_firewall *next; /* Next firewall on chain */
|
|
struct in_addr src, dst; /* Source and destination IP addr */
|
|
struct in_addr src_mask, dst_mask; /* Mask for src and dest IP addr */
|
|
u_short flags;
|
|
#define IP_FIREWALL_UNIVERSAL 0 /* This is a universal packet firewall*/
|
|
#define IP_FIREWALL_TCP 1 /* This is a TCP packet firewall */
|
|
#define IP_FIREWALL_UDP 2 /* This is a UDP packet firewall */
|
|
#define IP_FIREWALL_ICMP 3 /* This is a ICMP packet firewall */
|
|
#define IP_FIREWALL_KIND 3 /* Mask to isolate firewall kind */
|
|
#define IP_FIREWALL_ACCEPT 4 /* This is an accept firewall (as */
|
|
/* opposed to a deny firewall) */
|
|
#define IP_FIREWALL_SRC_RANGE 8 /* The first two src ports are a min
|
|
* and max range (stored in host byte
|
|
* order).
|
|
*/
|
|
#define IP_FIREWALL_DST_RANGE 16 /* The first two dst ports are a min
|
|
* and max range (stored in host byte
|
|
* order).
|
|
* (ports[0] <= port <= ports[1])
|
|
*/
|
|
#define IP_FIREWALL_PRINT 32 /* In verbos mode print this firewall */
|
|
#define IP_FIREWALL_FLAG_BITS 0x2f /* All possible flag bits */
|
|
u_short num_src_ports, num_dst_ports;/* # of src ports and # of dst ports */
|
|
/* in ports array (dst ports follow */
|
|
/* src ports; max of 10 ports in all; */
|
|
/* count of 0 means match all ports) */
|
|
#define IP_FIREWALL_MAX_PORTS 10 /* A reasonable maximum */
|
|
u_short ports[IP_FIREWALL_MAX_PORTS]; /* Array of port numbers to match */
|
|
};
|
|
|
|
/*
|
|
* New IP firewall options for [gs]etsockopt at the RAW IP level.
|
|
*/
|
|
#define IP_FW_BASE_CTL 53
|
|
|
|
#define IP_FW_ADD_BLK (IP_FW_BASE_CTL)
|
|
#define IP_FW_ADD_FWD (IP_FW_BASE_CTL+1)
|
|
#define IP_FW_CHK_BLK (IP_FW_BASE_CTL+2)
|
|
#define IP_FW_CHK_FWD (IP_FW_BASE_CTL+3)
|
|
#define IP_FW_DEL_BLK (IP_FW_BASE_CTL+4)
|
|
#define IP_FW_DEL_FWD (IP_FW_BASE_CTL+5)
|
|
#define IP_FW_FLUSH (IP_FW_BASE_CTL+6)
|
|
#define IP_FW_POLICY (IP_FW_BASE_CTL+7)
|
|
|
|
|
|
extern struct ip_firewall *ip_fw_blk_chain;
|
|
extern struct ip_firewall *ip_fw_fwd_chain;
|
|
extern int ip_fw_policy;
|
|
|
|
#endif
|