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Add ip6fw.

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Yes it is almost code freeze, but as the result of many thought, now I
think this should be added before 4.0...

make world check, kernel build check is done.

Reviewed by: green
Obtained from: KAME project
This commit is contained in:
Yoshinobu Inoue 2000-01-29 13:54:44 +00:00
parent 7b387768d7
commit 210d0432a3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=56815
14 changed files with 3195 additions and 0 deletions
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1
sbin/Makefile
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@ -21,6 +21,7 @@ SUBDIR= adjkerntz \
fsirand \
ifconfig \
init \
ip6fw \
ipf \
ipfstat \
ipfw \

6
sbin/ip6fw/Makefile Normal file
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@ -0,0 +1,6 @@
# $FreeBSD$
PROG= ip6fw
MAN8= ip6fw.8
.include <bsd.prog.mk>

478
sbin/ip6fw/ip6fw.8 Normal file
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@ -0,0 +1,478 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 20, 1996
.Dt IP6FW 8 SMM
.Os FreeBSD
.Sh NAME
.Nm ip6fw
.Nd controlling utility for IPv6 firewall
.Sh SYNOPSIS
.Nm
.Ar file
.Nm ip6fw
.Oo
.Fl f
|
.Fl q
.Oc
flush
.Nm ip6fw
.Oo
.Fl q
.Oc
zero
.Op Ar number ...
.Nm ip6fw
delete
.Ar number ...
.Nm ip6fw
.Op Fl aftN
list
.Op Ar number ...
.Nm ip6fw
.Oo
.Fl ftN
.Oc
show
.Op Ar number ...
.Nm ip6fw
.Oo
.Fl q
.Oc
add
.Op Ar number
.Ar action
.Op log
.Ar proto
from
.Ar src
to
.Ar dst
.Op via Ar name | ipv6no
.Op Ar options
.Sh DESCRIPTION
If used as shown in the first synopsis line, the
.Ar file
will be read line by line and applied as arguments to the
.Nm
command.
.Pp
The
.Nm
code works by going through the rule-list for each packet,
until a match is found.
All rules have two associated counters, a packet count and
a byte count.
These counters are updated when a packet matches the rule.
.Pp
The rules are ordered by a ``line-number'' from 1 to 65534 that is used
to order and delete rules. Rules are tried in increasing order, and the
first rule that matches a packet applies.
Multiple rules may share the same number and apply in
the order in which they were added.
.Pp
If a rule is added without a number, it is numbered 100 higher
than the previous rule. If the highest defined rule number is
greater than 65434, new rules are appended to the last rule.
.Pp
The delete operation deletes the first rule with number
.Ar number ,
if any.
.Pp
The list command prints out the current rule set.
.Pp
The show command is equivalent to `ip6fw -a list'.
.Pp
The zero operation zeroes the counters associated with rule number
.Ar number .
.Pp
The flush operation removes all rules.
.Pp
Any command beginning with a '#', or being all blank, is ignored.
.Pp
One rule is always present:
.Bd -literal -offset center
65535 deny all from any to any
.Ed
.Pp
This rule is the default policy, i.e., don't allow anything at all.
Your job in setting up rules is to modify this policy to match your
needs.
.Pp
The following options are available:
.Bl -tag -width flag
.It Fl a
While listing, show counter values. See also ``show'' command.
.It Fl f
Don't ask for confirmation for commands that can cause problems if misused
(ie; flush).
.Ar Note ,
if there is no tty associated with the process, this is implied.
.It Fl q
While adding, zeroing or flushing, be quiet about actions (implies '-f').
This is useful for adjusting rules by executing multiple ip6fw commands in a
script (e.g. sh /etc/rc.firewall), or by processing a file of many ip6fw rules,
across a remote login session. If a flush is performed in normal
(verbose) mode, it prints a message. Because all rules are flushed, the
message cannot be delivered to the login session, the login session is
closed and the remainder of the ruleset is not processed. Access to the
console is required to recover.
.It Fl t
While listing, show last match timestamp.
.It Fl N
Try to resolve addresses and service names in output.
.El
.Pp
.Ar action :
.Bl -hang -offset flag -width 1234567890123456
.It Ar allow
Allow packets that match rule.
The search terminates. Aliases are
.Ar pass ,
.Ar permit ,
and
.Ar accept .
.It Ar deny
Discard packets that match this rule.
The search terminates.
.Ar Drop
is an alias for
.Ar deny .
.It Ar reject
(Deprecated.) Discard packets that match this rule, and try to send an ICMPv6
host unreachable notice.
The search terminates.
.It Ar unreach code
Discard packets that match this rule, and try to send an ICMPv6
unreachable notice with code
.Ar code ,
where
.Ar code
is a number from zero to 255, or one of these aliases:
.Ar noroute ,
.Ar admin ,
.Ar notneighbor ,
.Ar addr ,
or
.Ar noport ,
The search terminates.
.It Ar reset
TCP packets only. Discard packets that match this rule,
and try to send a TCP reset (RST) notice.
The search terminates
.Em (not working yet).
.It Ar count
Update counters for all packets that match rule.
The search continues with the next rule.
.It Ar skipto number
Skip all subsequent rules numbered less than
.Ar number .
The search continues with the first rule numbered
.Ar number
or higher.
.El
.Pp
If the kernel was compiled with
.Dv IP6FIREWALL_VERBOSE ,
then when a packet matches a rule with the ``log''
keyword a message will be printed on the console.
If the kernel was compiled with the
.Dv IP6FIREWALL_VERBOSE_LIMIT
option, then logging will cease after the number of packets
specified by the option are received for that particular
chain entry. Logging may then be re-enabled by clearing
the packet counter for that entry.
.Pp
Console logging and the log limit are adjustable dynamically
through the
.Xr sysctl 8
interface.
.Pp
.Ar proto :
.Bl -hang -offset flag -width 1234567890123456
.It Ar ipv6
All packets match. The alias
.Ar all
has the same effect.
.It Ar tcp
Only TCP packets match.
.It Ar udp
Only UDP packets match.
.It Ar ipv6-icmp
Only ICMPv6 packets match.
.It Ar <number|name>
Only packets for the specified protocol matches (see
.Pa /etc/protocols
for a complete list).
.El
.Pp
.Ar src
and
.Ar dst :
.Bl -hang -offset flag
.It Ar <address/prefixlen>
.Op Ar ports
.El
.Pp
The
.Em <address/prefixlen>
may be specified as:
.Bl -hang -offset flag -width 1234567890123456
.It Ar ipv6no
An ipv6number of the form fec0::1:2:3:4.
.It Ar ipv6no/prefixlen
An ipv6number with a prefix length of the form fec0::1:2:3:4/112.
.El
.Pp
The sense of the match can be inverted by preceding an address with the
``not'' modifier, causing all other addresses to be matched instead. This
does not affect the selection of port numbers.
.Pp
With the TCP and UDP protocols, optional
.Em ports
may be specified as:
.Pp
.Bl -hang -offset flag
.It Ns {port|port-port} Ns Op ,port Ns Op ,...
.El
.Pp
Service names (from
.Pa /etc/services )
may be used instead of numeric port values.
A range may only be specified as the first value,
and the length of the port list is limited to
.Dv IP6_FW_MAX_PORTS
(as defined in
.Pa /usr/src/sys/netinet/ip6_fw.h )
ports.
.Pp
Fragmented packets which have a non-zero offset (i.e. not the first
fragment) will never match a rule which has one or more port
specifications. See the
.Ar frag
option for details on matching fragmented packets.
.Pp
Rules can apply to packets when they are incoming, or outgoing, or both.
The
.Ar in
keyword indicates the rule should only match incoming packets.
The
.Ar out
keyword indicates the rule should only match outgoing packets.
.Pp
To match packets going through a certain interface, specify
the interface using
.Ar via :
.Bl -hang -offset flag -width 1234567890123456
.It Ar via ifX
Packet must be going through interface
.Ar ifX.
.It Ar via if*
Packet must be going through interface
.Ar ifX ,
where X is any unit number.
.It Ar via any
Packet must be going through
.Em some
interface.
.It Ar via ipv6no
Packet must be going through the interface having IPv6 address
.Ar ipv6no .
.El
.Pp
The
.Ar via
keyword causes the interface to always be checked.
If
.Ar recv
or
.Ar xmit
is used instead of
.Ar via ,
then the only receive or transmit interface (respectively) is checked.
By specifying both, it is possible to match packets based on both receive
and transmit interface, e.g.:
.Pp
.Dl "ip6fw add 100 deny ip from any to any out recv ed0 xmit ed1"
.Pp
The
.Ar recv
interface can be tested on either incoming or outgoing packets, while the
.Ar xmit
interface can only be tested on outgoing packets. So
.Ar out
is required (and
.Ar in
invalid) whenver
.Ar xmit
is used. Specifying
.Ar via
together with
.Ar xmit
or
.Ar recv
is invalid.
.Pp
A packet may not have a receive or transmit interface: packets originating
from the local host have no receive interface. while packets destined for
the local host have no transmit interface.
.Pp
Additional
.Ar options :
.Bl -hang -offset flag -width 1234567890123456
.It frag
Matches if the packet is a fragment and this is not the first fragment
of the datagram.
.Ar frag
may not be used in conjunction with either
.Ar tcpflags
or TCP/UDP port specifications.
.It in
Matches if this packet was on the way in.
.It out
Matches if this packet was on the way out.
.It ipv6options Ar spec
Matches if the IPv6 header contains the comma separated list of
options specified in
.Ar spec .
The supported IPv6 options are:
.Ar hopopt
(hop-by-hop options header),
.Ar route
(routing header),
.Ar frag
(fragment header),
.Ar esp
(encapsulating security payload),
.Ar ah
(authentication header),
.Ar nonxt
(no next header), and
.Ar opts
(destination options header).
The absence of a particular option may be denoted
with a ``!''
.Em (not working yet).
.It established
Matches packets that have the RST or ACK bits set.
TCP packets only.
.It setup
Matches packets that have the SYN bit set but no ACK bit.
TCP packets only.
.It tcpflags Ar spec
Matches if the TCP header contains the comma separated list of
flags specified in
.Ar spec .
The supported TCP flags are:
.Ar fin ,
.Ar syn ,
.Ar rst ,
.Ar psh ,
.Ar ack ,
and
.Ar urg .
The absence of a particular flag may be denoted
with a ``!''.
A rule which contains a
.Ar tcpflags
specification can never match a fragmented packet which has
a non-zero offset. See the
.Ar frag
option for details on matching fragmented packets.
.It icmptypes Ar types
Matches if the ICMPv6 type is in the list
.Ar types .
The list may be specified as any combination of ranges
or individual types separated by commas.
.El
.Sh CHECKLIST
Here are some important points to consider when designing your
rules:
.Bl -bullet -hang -offset flag
.It
Remember that you filter both packets going in and out.
Most connections need packets going in both directions.
.It
Remember to test very carefully.
It is a good idea to be near the console when doing this.
.It
Don't forget the loopback interface.
.El
.Sh FINE POINTS
There is one kind of packet that the firewall will always discard,
that is an IPv6 fragment with a fragment offset of one.
This is a valid packet, but it only has one use, to try to circumvent
firewalls.
.Pp
If you are logged in over a network, loading the LKM version of
.Nm
is probably not as straightforward as you would think
.Em (not supported).
I recommend this command line:
.Bd -literal -offset center
modload /lkm/ip6fw_mod.o && \e
ip6fw add 32000 allow all from any to any
.Ed
.Pp
Along the same lines, doing an
.Bd -literal -offset center
ip6fw flush
.Ed
.Pp
in similar surroundings is also a bad idea.
.Sh PACKET DIVERSION
not supported.
.Sh EXAMPLES
This command adds an entry which denies all tcp packets from
.Em hacker.evil.org
to the telnet port of
.Em wolf.tambov.su
from being forwarded by the host:
.Pp
.Dl ip6fw add deny tcp from hacker.evil.org to wolf.tambov.su 23
.Pp
This one disallows any connection from the entire hackers network to
my host:
.Pp
.Dl ip6fw addf deny all from fec0::123:45:67:0/112 to my.host.org
.Pp
Here is a good usage of the list command to see accounting records
and timestamp information:
.Pp
.Dl ip6fw -at l
.Pp
or in short form without timestamps:
.Pp
.Dl ip6fw -a l
.Pp
.Sh SEE ALSO
.Xr ip 4 ,
.Xr ipfirewall 4 ,
.Xr protocols 5 ,
.Xr services 5 ,
.Xr reboot 8 ,
.Xr syslogd 8 ,
.Xr sysctl 8
.Sh BUGS
.Pp
.Em WARNING!!WARNING!!WARNING!!WARNING!!WARNING!!WARNING!!WARNING!!
.Pp
This program can put your computer in rather unusable state. When
using it for the first time, work on the console of the computer, and
do
.Em NOT
do anything you don't understand.
.Pp
When manipulating/adding chain entries, service and protocol names are
not accepted.
.Sh AUTHORS
Ugen J. S. Antsilevich,
Poul-Henning Kamp,
Alex Nash,
Archie Cobbs.
API based upon code written by Daniel Boulet for BSDI.
.Sh HISTORY
.Nm
first appeared in
.Fx 2.0 .

1290
sbin/ip6fw/ip6fw.c Normal file
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28
sbin/ip6fw/sample.sh Normal file
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@ -0,0 +1,28 @@
#!/bin/sh -
# $FreeBSD$
fwcmd=/usr/local/v6/sbin/ip6fw
$fwcmd -f flush
#
# loopback
#
$fwcmd add 1000 pass all from any to any via lo0
#
# ND
#
# DAD
$fwcmd add 2000 pass ipv6-icmp from ff02::/16 to ::
$fwcmd add 2100 pass ipv6-icmp from :: to ff02::/16
# RS, RA, NS, NA, redirect...
$fwcmd add 2300 pass ipv6-icmp from fe80::/10 to fe80::/10
$fwcmd add 2400 pass ipv6-icmp from fe80::/10 to ff02::/16
$fwcmd add 5000 pass tcp from any to any established
# RIPng
$fwcmd add 6000 pass udp from fe80::/10 521 to ff02::9 521
$fwcmd add 65000 pass log all from any to any

4
sys/conf/NOTES
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@ -525,6 +525,10 @@ options IPFIREWALL_VERBOSE #print information about
options IPFIREWALL_FORWARD #enable transparent proxy support
options IPFIREWALL_VERBOSE_LIMIT=100 #limit verbosity
options IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options IPV6FIREWALL #firewall for IPv6
options IPV6FIREWALL_VERBOSE
options IPV6FIREWALL_VERBOSE_LIMIT=100
options IPV6FIREWALL_DEFAULT_TO_ACCEPT
options IPDIVERT #divert sockets
options IPFILTER #ipfilter support
options IPFILTER_LOG #ipfilter logging

1
sys/conf/files
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@ -721,6 +721,7 @@ netinet6/in6.c optional inet6
netinet6/in6_cksum.c optional inet6
netinet6/in6_gif.c optional gif inet6
netinet6/ip6_forward.c optional inet6
netinet6/ip6_fw.c optional inet6
netinet6/in6_ifattach.c optional inet6
netinet6/ip6_input.c optional inet6
netinet6/ip6_mroute.c optional inet6

4
sys/conf/options
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@ -251,6 +251,10 @@ IPFIREWALL_VERBOSE opt_ipfw.h
IPFIREWALL_VERBOSE_LIMIT opt_ipfw.h
IPFIREWALL_DEFAULT_TO_ACCEPT opt_ipfw.h
IPFIREWALL_FORWARD opt_ipfw.h
IPV6FIREWALL opt_ip6fw.h
IPV6FIREWALL_VERBOSE opt_ip6fw.h
IPV6FIREWALL_VERBOSE_LIMIT opt_ip6fw.h
IPV6FIREWALL_DEFAULT_TO_ACCEPT opt_ip6fw.h
IPSTEALTH
IPX opt_ipx.h
IPXIP opt_ipx.h

4
sys/i386/conf/LINT
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@ -525,6 +525,10 @@ options IPFIREWALL_VERBOSE #print information about
options IPFIREWALL_FORWARD #enable transparent proxy support
options IPFIREWALL_VERBOSE_LIMIT=100 #limit verbosity
options IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options IPV6FIREWALL #firewall for IPv6
options IPV6FIREWALL_VERBOSE
options IPV6FIREWALL_VERBOSE_LIMIT=100
options IPV6FIREWALL_DEFAULT_TO_ACCEPT
options IPDIVERT #divert sockets
options IPFILTER #ipfilter support
options IPFILTER_LOG #ipfilter logging

4
sys/i386/conf/NOTES
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@ -525,6 +525,10 @@ options IPFIREWALL_VERBOSE #print information about
options IPFIREWALL_FORWARD #enable transparent proxy support
options IPFIREWALL_VERBOSE_LIMIT=100 #limit verbosity
options IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options IPV6FIREWALL #firewall for IPv6
options IPV6FIREWALL_VERBOSE
options IPV6FIREWALL_VERBOSE_LIMIT=100
options IPV6FIREWALL_DEFAULT_TO_ACCEPT
options IPDIVERT #divert sockets
options IPFILTER #ipfilter support
options IPFILTER_LOG #ipfilter logging

1171
sys/netinet6/ip6_fw.c Normal file
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sys/netinet6/ip6_fw.h Normal file
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/*
* 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.
*
* $Id: ip6_fw.h,v 1.1 1999/08/06 14:10:09 itojun Exp $
* $FreeBSD$
*/
#ifndef _IP6_FW_H
#define _IP6_FW_H
#include <net/if.h>
/*
* This union structure identifies an interface, either explicitly
* by name or implicitly by IP address. The flags IP_FW_F_IIFNAME
* and IP_FW_F_OIFNAME say how to interpret this structure. An
* interface unit number of -1 matches any unit number, while an
* IP address of 0.0.0.0 indicates matches any interface.
*
* The receive and transmit interfaces are only compared against the
* the packet if the corresponding bit (IP_FW_F_IIFACE or IP_FW_F_OIFACE)
* is set. Note some packets lack a receive or transmit interface
* (in which case the missing "interface" never matches).
*/
union ip6_fw_if {
struct in6_addr fu_via_ip6; /* Specified by IPv6 address */
struct { /* Specified by interface name */
#define FW_IFNLEN IFNAMSIZ
char name[FW_IFNLEN];
short unit; /* -1 means match any unit */
} fu_via_if;
};
/*
* Format of an IP firewall descriptor
*
* fw_src, fw_dst, fw_smsk, fw_dmsk are always stored in network byte order.
* fw_flg and fw_n*p are stored in host byte order (of course).
* Port numbers are stored in HOST byte order.
* Warning: setsockopt() will fail if sizeof(struct ip_fw) > MLEN (108)
*/
struct ip6_fw {
u_long fw_pcnt,fw_bcnt; /* Packet and byte counters */
struct in6_addr fw_src, fw_dst; /* Source and destination IPv6 addr */
/* Mask for src and dest IPv6 addr */
struct in6_addr fw_smsk, fw_dmsk;
u_short fw_number; /* Rule number */
u_short fw_flg; /* Flags word */
#define IPV6_FW_MAX_PORTS 10 /* A reasonable maximum */
/* Array of port numbers to match */
u_short fw_pts[IPV6_FW_MAX_PORTS];
u_char fw_ip6opt,fw_ip6nopt; /* IPv6 options set/unset */
u_char fw_tcpf,fw_tcpnf; /* TCP flags set/unset */
#define IPV6_FW_ICMPTYPES_DIM (32 / (sizeof(unsigned) * 8))
/* ICMP types bitmap */
unsigned fw_icmp6types[IPV6_FW_ICMPTYPES_DIM];
long timestamp; /* timestamp (tv_sec) of last match */
/* Incoming and outgoing interfaces */
union ip6_fw_if fw_in_if, fw_out_if;
union {
u_short fu_divert_port; /* Divert/tee port (options IP6DIVERT) */
u_short fu_skipto_rule; /* SKIPTO command rule number */
u_short fu_reject_code; /* REJECT response code */
} fw_un;
u_char fw_prot; /* IPv6 protocol */
u_char fw_nports; /* N'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 IPV6_FW_GETNSRCP(rule) ((rule)->fw_nports & 0x0f)
#define IPV6_FW_SETNSRCP(rule, n) do { \
(rule)->fw_nports &= ~0x0f; \
(rule)->fw_nports |= (n); \
} while (0)
#define IPV6_FW_GETNDSTP(rule) ((rule)->fw_nports >> 4)
#define IPV6_FW_SETNDSTP(rule, n) do { \
(rule)->fw_nports &= ~0xf0; \
(rule)->fw_nports |= (n) << 4;\
} while (0)
#define fw_divert_port fw_un.fu_divert_port
#define fw_skipto_rule fw_un.fu_skipto_rule
#define fw_reject_code fw_un.fu_reject_code
struct ip6_fw_chain {
LIST_ENTRY(ip6_fw_chain) chain;
struct ip6_fw *rule;
};
/*
* Values for "flags" field .
*/
#define IPV6_FW_F_IN 0x0001 /* Check inbound packets */
#define IPV6_FW_F_OUT 0x0002 /* Check outbound packets */
#define IPV6_FW_F_IIFACE 0x0004 /* Apply inbound interface test */
#define IPV6_FW_F_OIFACE 0x0008 /* Apply outbound interface test */
#define IPV6_FW_F_COMMAND 0x0070 /* Mask for type of chain entry: */
#define IPV6_FW_F_DENY 0x0000 /* This is a deny rule */
#define IPV6_FW_F_REJECT 0x0010 /* Deny and send a response packet */
#define IPV6_FW_F_ACCEPT 0x0020 /* This is an accept rule */
#define IPV6_FW_F_COUNT 0x0030 /* This is a count rule */
#define IPV6_FW_F_DIVERT 0x0040 /* This is a divert rule */
#define IPV6_FW_F_TEE 0x0050 /* This is a tee rule */
#define IPV6_FW_F_SKIPTO 0x0060 /* This is a skipto rule */
#define IPV6_FW_F_PRN 0x0080 /* Print if this rule matches */
#define IPV6_FW_F_SRNG 0x0100 /* The first two src ports are a min *
* and max range (stored in host byte *
* order). */
#define IPV6_FW_F_DRNG 0x0200 /* The first two dst ports are a min *
* and max range (stored in host byte *
* order). */
/* In interface by name/unit (not IP) */
#define IPV6_FW_F_IIFNAME 0x0400
/* Out interface by name/unit (not IP) */
#define IPV6_FW_F_OIFNAME 0x0800
#define IPV6_FW_F_INVSRC 0x1000 /* Invert sense of src check */
#define IPV6_FW_F_INVDST 0x2000 /* Invert sense of dst check */
#define IPV6_FW_F_FRAG 0x4000 /* Fragment */
#define IPV6_FW_F_ICMPBIT 0x8000 /* ICMP type bitmap is valid */
#define IPV6_FW_F_MASK 0xFFFF /* All possible flag bits mask */
/*
* For backwards compatibility with rules specifying "via iface" but
* not restricted to only "in" or "out" packets, we define this combination
* of bits to represent this configuration.
*/
#define IF6_FW_F_VIAHACK (IPV6_FW_F_IN|IPV6_FW_F_OUT|IPV6_FW_F_IIFACE|\
IPV6_FW_F_OIFACE)
/*
* Definitions for REJECT response codes.
* Values less than 256 correspond to ICMP unreachable codes.
*/
#define IPV6_FW_REJECT_RST 0x0100 /* TCP packets: send RST */
/*
* Definitions for IPv6 option names.
*/
#define IPV6_FW_IP6OPT_HOPOPT 0x01
#define IPV6_FW_IP6OPT_ROUTE 0x02
#define IPV6_FW_IP6OPT_FRAG 0x04
#define IPV6_FW_IP6OPT_ESP 0x08
#define IPV6_FW_IP6OPT_AH 0x10
#define IPV6_FW_IP6OPT_NONXT 0x20
#define IPV6_FW_IP6OPT_OPTS 0x40
/*
* Definitions for TCP flags.
*/
#define IPV6_FW_TCPF_FIN TH_FIN
#define IPV6_FW_TCPF_SYN TH_SYN
#define IPV6_FW_TCPF_RST TH_RST
#define IPV6_FW_TCPF_PSH TH_PUSH
#define IPV6_FW_TCPF_ACK TH_ACK
#define IPV6_FW_TCPF_URG TH_URG
#define IPV6_FW_TCPF_ESTAB 0x40
/*
* Main firewall chains definitions and global var's definitions.
*/
#ifdef _KERNEL
/*
* Function definitions.
*/
void ip6_fw_init(void);
/* Firewall hooks */
struct ip6_hdr;
typedef int ip6_fw_chk_t __P((struct ip6_hdr**, struct ifnet*,
u_short *, struct mbuf**));
typedef int ip6_fw_ctl_t __P((int, struct mbuf**));
extern ip6_fw_chk_t *ip6_fw_chk_ptr;
extern ip6_fw_ctl_t *ip6_fw_ctl_ptr;
#endif /* _KERNEL */
#endif /* _IP6_FW_H */

1
sys/netinet6/ip6_input.c
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@ -65,6 +65,7 @@
*/
#include "opt_ipsec.h"
#include "opt_ip6fw.h"
#include <sys/param.h>
#include <sys/systm.h>

1
sys/netinet6/ip6_output.c
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@ -65,6 +65,7 @@
*/
#include "opt_ipsec.h"
#include "opt_ip6fw.h"
#include <sys/param.h>
#include <sys/malloc.h>