189 lines
7.6 KiB
C
189 lines
7.6 KiB
C
/* Copyright (C) 1991, 92, 93, 95, 96, 97 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This header file was taken from linux (2.1.26) sources and modified
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* to work under GNU LIBC 2.0.
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*/
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/*
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* Copyright (c) 1993 Daniel Boulet
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* Copyright (c) 1994 Ugen J.S.Antsilevich
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*/
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/*
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* Format of an IP firewall descriptor
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*
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* src, dst, src_mask, dst_mask are always stored in network byte order.
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* flags and num_*_ports are stored in host byte order (of course).
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* Port numbers are stored in HOST byte order.
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*/
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#ifndef _NETINET_FW_H
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#define _NETINET_FW_H
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/tcp.h>
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#include <netinet/udp.h>
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#include <net/if.h>
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__BEGIN_DECLS
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struct ip_fw {
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struct ip_fw *fw_next; /* Next firewall on chain */
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struct in_addr fw_src, fw_dst; /* Source and destination IP addr */
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struct in_addr fw_smsk, fw_dmsk; /* Mask for src and dest IP addr */
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struct in_addr fw_via; /* IP address of interface "via" */
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void *fw_viadev; /* device of interface "via" */
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u_int16_t fw_flg; /* Flags word */
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u_int16_t fw_nsp, fw_ndp; /* N'of src ports and # of dst ports */
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/* in ports array (dst ports follow */
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/* src ports; max of 10 ports in all;*/
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/* count of 0 means match all ports) */
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#define IP_FW_MAX_PORTS 10 /* A reasonable maximum */
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u_int16_t fw_pts[IP_FW_MAX_PORTS]; /* Array of port numbers to match */
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u_int32_t fw_pcnt, fw_bcnt; /* Packet and byte counters */
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u_int8_t fw_tosand, fw_tosxor; /* Revised packet priority */
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char fw_vianame[IFNAMSIZ]; /* name of interface "via" */
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};
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/*
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* Values for "flags" field .
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*/
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#define IP_FW_F_ALL 0x0000 /* This is a universal packet firewall*/
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#define IP_FW_F_TCP 0x0001 /* This is a TCP packet firewall */
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#define IP_FW_F_UDP 0x0002 /* This is a UDP packet firewall */
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#define IP_FW_F_ICMP 0x0003 /* This is a ICMP packet firewall */
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#define IP_FW_F_KIND 0x0003 /* Mask to isolate firewall kind */
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#define IP_FW_F_ACCEPT 0x0004 /* This is an accept firewall (as *
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* opposed to a deny firewall)*
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* */
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#define IP_FW_F_SRNG 0x0008 /* The first two src ports are a min *
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* and max range (stored in host byte *
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* order). *
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* */
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#define IP_FW_F_DRNG 0x0010 /* The first two dst ports are a min *
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* and max range (stored in host byte *
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* order). *
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* (ports[0] <= port <= ports[1]) *
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* */
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#define IP_FW_F_PRN 0x0020 /* In verbose mode print this firewall*/
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#define IP_FW_F_BIDIR 0x0040 /* For bidirectional firewalls */
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#define IP_FW_F_TCPSYN 0x0080 /* For tcp packets-check SYN only */
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#define IP_FW_F_ICMPRPL 0x0100 /* Send back icmp unreachable packet */
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#define IP_FW_F_MASQ 0x0200 /* Masquerading */
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#define IP_FW_F_TCPACK 0x0400 /* For tcp-packets match if ACK is set*/
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#define IP_FW_F_REDIR 0x0800 /* Redirect to local port fw_pts[n] */
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#define IP_FW_F_ACCTIN 0x1000 /* Account incoming packets only. */
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#define IP_FW_F_ACCTOUT 0x2000 /* Account outgoing packets only. */
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#define IP_FW_F_MASK 0x3FFF /* All possible flag bits mask */
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/*
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* New IP firewall options for [gs]etsockopt at the RAW IP level.
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* Unlike BSD Linux inherits IP options so you don't have to use
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* a raw socket for this. Instead we check rights in the calls.
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*/
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#define IP_FW_BASE_CTL 64 /* base for firewall socket options */
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#define IP_FW_COMMAND 0x00FF /* mask for command without chain */
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#define IP_FW_TYPE 0x0300 /* mask for type (chain) */
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#define IP_FW_SHIFT 8 /* shift count for type (chain) */
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#define IP_FW_FWD 0
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#define IP_FW_IN 1
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#define IP_FW_OUT 2
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#define IP_FW_ACCT 3
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#define IP_FW_CHAINS 4 /* total number of ip_fw chains */
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#define IP_FW_INSERT (IP_FW_BASE_CTL)
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#define IP_FW_APPEND (IP_FW_BASE_CTL+1)
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#define IP_FW_DELETE (IP_FW_BASE_CTL+2)
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#define IP_FW_FLUSH (IP_FW_BASE_CTL+3)
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#define IP_FW_ZERO (IP_FW_BASE_CTL+4)
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#define IP_FW_POLICY (IP_FW_BASE_CTL+5)
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#define IP_FW_CHECK (IP_FW_BASE_CTL+6)
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#define IP_FW_MASQ_TIMEOUTS (IP_FW_BASE_CTL+7)
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#define IP_FW_INSERT_FWD (IP_FW_INSERT | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_APPEND_FWD (IP_FW_APPEND | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_DELETE_FWD (IP_FW_DELETE | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_FLUSH_FWD (IP_FW_FLUSH | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_ZERO_FWD (IP_FW_ZERO | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_POLICY_FWD (IP_FW_POLICY | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_CHECK_FWD (IP_FW_CHECK | (IP_FW_FWD << IP_FW_SHIFT))
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#define IP_FW_INSERT_IN (IP_FW_INSERT | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_APPEND_IN (IP_FW_APPEND | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_DELETE_IN (IP_FW_DELETE | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_FLUSH_IN (IP_FW_FLUSH | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_ZERO_IN (IP_FW_ZERO | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_POLICY_IN (IP_FW_POLICY | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_CHECK_IN (IP_FW_CHECK | (IP_FW_IN << IP_FW_SHIFT))
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#define IP_FW_INSERT_OUT (IP_FW_INSERT | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_FW_APPEND_OUT (IP_FW_APPEND | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_FW_DELETE_OUT (IP_FW_DELETE | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_FW_FLUSH_OUT (IP_FW_FLUSH | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_FW_ZERO_OUT (IP_FW_ZERO | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_FW_POLICY_OUT (IP_FW_POLICY | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_FW_CHECK_OUT (IP_FW_CHECK | (IP_FW_OUT << IP_FW_SHIFT))
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#define IP_ACCT_INSERT (IP_FW_INSERT | (IP_FW_ACCT << IP_FW_SHIFT))
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#define IP_ACCT_APPEND (IP_FW_APPEND | (IP_FW_ACCT << IP_FW_SHIFT))
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#define IP_ACCT_DELETE (IP_FW_DELETE | (IP_FW_ACCT << IP_FW_SHIFT))
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#define IP_ACCT_FLUSH (IP_FW_FLUSH | (IP_FW_ACCT << IP_FW_SHIFT))
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#define IP_ACCT_ZERO (IP_FW_ZERO | (IP_FW_ACCT << IP_FW_SHIFT))
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struct ip_fwpkt
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{
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struct iphdr fwp_iph; /* IP header */
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union {
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struct tcphdr fwp_tcph; /* TCP header or */
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struct udphdr fwp_udph; /* UDP header */
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struct icmphdr fwp_icmph; /* ICMP header */
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} fwp_protoh;
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struct in_addr fwp_via; /* interface address */
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char fwp_vianame[IFNAMSIZ]; /* interface name */
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};
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/*
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* timeouts for ip masquerading
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*/
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struct ip_fw_masq;
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__END_DECLS
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#endif /* _NETINET_IP_FW_H */
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