ipf_include.sh revision 7ddce99911fbb5e44b38ac65e991a22e42267ee9
#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
# Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
# Copyright 2016 Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
#
IPFILTER_FMRI="svc:/network/ipfilter:default"
ETC_IPF_DIR=/etc/ipf
IPNATCONF=`/usr/bin/svcprop -p config/ipnat_config_file $IPFILTER_FMRI \
2>/dev/null`
if [ $? -eq 1 ]; then
IPNATCONF=$ETC_IPF_DIR/ipnat.conf
fi
IPPOOLCONF=`/usr/bin/svcprop -p config/ippool_config_file $IPFILTER_FMRI \
2>/dev/null`
if [ $? -eq 1 ]; then
IPPOOLCONF=$ETC_IPF_DIR/ippool.conf
fi
VAR_IPF_DIR=/var/run/ipf
IPFILCONF=$VAR_IPF_DIR/ipf.conf
IP6FILCONF=$VAR_IPF_DIR/ipf6.conf
IPFILOVRCONF=$VAR_IPF_DIR/ipf_ovr.conf
IP6FILOVRCONF=$VAR_IPF_DIR/ipf6_ovr.conf
IPF_LOCK=/var/run/ipflock
CONF_FILES=""
CONF6_FILES=""
NAT_FILES=""
IPF_SUFFIX=".ipf"
IPF6_SUFFIX=".ipf6"
NAT_SUFFIX=".nat"
# version for configuration upgrades
CURRENT_VERSION=1
IPF_FMRI="svc:/network/ipfilter:default"
INETDFMRI="svc:/network/inetd:default"
RPCBINDFMRI="svc:/network/rpc/bind:default"
SMF_ONLINE="online"
SMF_MAINT="maintenance"
SMF_NONE="none"
FW_CONTEXT_PG="firewall_context"
METHOD_PROP="ipf_method"
FW_CONFIG_PG="firewall_config"
POLICY_PROP="policy"
APPLY2_PROP="apply_to"
APPLY2_6_PROP="apply_to_6"
EXCEPTIONS_PROP="exceptions"
EXCEPTIONS_6_PROP="exceptions_6"
TARGET_PROP="target"
TARGET_6_PROP="target_6"
BLOCKPOL_PROP="block_policy"
FW_CONFIG_DEF_PG="firewall_config_default"
FW_CONFIG_OVR_PG="firewall_config_override"
CUSTOM_FILE_PROP="custom_policy_file"
CUSTOM_FILE_6_PROP="custom_policy_file_6"
OPEN_PORTS_PROP="open_ports"
PREFIX_HOST="host:"
PREFIX_NET="network:"
PREFIX_POOL="pool:"
PREFIX_IF="if:"
GLOBAL_CONFIG=""
GLOBAL_POLICY=""
GLOBAL_BLOCK_POLICY=""
SERVINFO=/usr/lib/servinfo
#
# Get value(s) for given property from either firewall_config_default or
# firewall_config_override property groups.
#
# global_get_prop_value pg_name propname
# pg_name - FW_CONFIG_DEF_PG or FW_CONFIG_OVR_PG
# propname - property name
#
global_get_prop_value()
{
target_pg=$1
prop=$2
[ "$1" != $FW_CONFIG_OVR_PG -a "$1" != $FW_CONFIG_DEF_PG ] && return
[ "$1" == $FW_CONFIG_DEF_PG ] && extra_pg=$FW_CONFIG_OVR_PG || \
extra_pg=$FW_CONFIG_DEF_PG
value=`echo $GLOBAL_CONFIG | awk '{
found=0
for (i=1; i<=NF; i++) {
if (found == 1) {
if (index($i, target_pg) == 1 || index($i, extra_pg) == 1)
break;
print $i;
}
if (split($i, values, "/") < 2)
continue;
if (values[1] == target_pg && values[2] == prop)
found=1;
}
}' target_pg=$target_pg prop=$prop extra_pg=$extra_pg`
# Return
echo "$value"
}
#
# Initialize and cache network/ipfilter configuration, global configuration.
#
# Since an SMF service configuration may get updated during the execution of the
# service method, it's best to read all relevant configuration via one svcprop
# invocation and cache it for later use.
#
# This function reads and stores relevant configuration into GLOBAL_CONFIG and
# initializes the GLOBAL_POLICY and GLOBAL_BLOCK_POLICY variables. GLOBAL_CONFIG
# is a string containing pg/prop and their corresponding values (i.e. svcprop -p
# pg fmri output). To get values for a certain pg/prop, use
# global_get_prop_value().
#
global_init()
{
GLOBAL_CONFIG=`svcprop -p ${FW_CONFIG_OVR_PG} -p ${FW_CONFIG_DEF_PG} \
$IPF_FMRI 2>/dev/null | awk '{$2=" "; print $0}'`
GLOBAL_POLICY=`global_get_prop_value $FW_CONFIG_DEF_PG $POLICY_PROP`
GLOBAL_BLOCK_POLICY=`global_get_prop_value $FW_CONFIG_DEF_PG \
$BLOCKPOL_PROP`
}
#
# Given a service, gets its config pg name
#
get_config_pg()
{
if [ "$1" = "$IPF_FMRI" ]; then
echo "$FW_CONFIG_DEF_PG"
else
echo "$FW_CONFIG_PG"
fi
return 0
}
#
# Given a service, gets its firewall policy
#
get_policy()
{
config_pg=`get_config_pg $1`
svcprop -p $config_pg/${POLICY_PROP} $1 2>/dev/null
}
#
# block policy can be set to "return", which will expand into
# separate block rules for tcp (block return-rst ...) and all other
# protocols (block return-icmp-as-dest ...)
#
get_block_policy()
{
config_pg=`get_config_pg $1`
svcprop -p $config_pg/${BLOCKPOL_PROP} $1 2>/dev/null
}
#
# Given a service, gets its source address exceptions for IPv4
#
get_exceptions()
{
config_pg=`get_config_pg $1`
exceptions=`svcprop -p $config_pg/${EXCEPTIONS_PROP} $1 2>/dev/null`
echo $exceptions | sed -e 's/\\//g'
}
#
# Given a service, gets its source address exceptions for IPv6
#
get_exceptions_6()
{
config_pg=`get_config_pg $1`
exceptions6=`svcprop -p $config_pg/${EXCEPTIONS_6_PROP} $1 2>/dev/null`
echo $exceptions6 | sed -e 's/\\//g'
}
#
# Given a service, gets its firewalled source addresses for IPv4
#
get_apply2_list()
{
config_pg=`get_config_pg $1`
apply2=`svcprop -p $config_pg/${APPLY2_PROP} $1 2>/dev/null`
echo $apply2 | sed -e 's/\\//g'
}
#
# Given a service, gets its firewalled source addresses for IPv6
#
get_apply2_6_list()
{
config_pg=`get_config_pg $1`
apply2_6=`svcprop -p $config_pg/${APPLY2_6_PROP} $1 2>/dev/null`
echo $apply2_6 | sed -e 's/\\//g'
}
#
# Given a service, gets its firewalled target addresses for IPv4
#
get_target_list()
{
config_pg=`get_config_pg $1`
target=`svcprop -p $config_pg/${TARGET_PROP} $1 2>/dev/null`
[ -z "$target" -o "$target" = '""' ] && target=any
echo $target | sed -e 's/\\//g'
}
#
# Given a service, gets its firewalled target addresses for IPv6
#
get_target_6_list()
{
config_pg=`get_config_pg $1`
target6=`svcprop -p $config_pg/${TARGET_6_PROP} $1 2>/dev/null`
[ -z "$target6" -o "$target6" = '""' ] && target6=any
echo $target6 | sed -e 's/\\//g'
}
check_ipf_dir()
{
[ -d $VAR_IPF_DIR ] && return 0
mkdir $VAR_IPF_DIR >/dev/null 2>&1 || return 1
}
#
# fmri_to_file fmri suffix
#
fmri_to_file()
{
check_ipf_dir || return 1
fprefix="${VAR_IPF_DIR}/`echo $1 | tr -s '/:' '__'`"
echo "${fprefix}${2}"
}
#
# Return service's enabled property
#
service_is_enabled()
{
#
# Temporary enabled state overrides the persistent state
# so check it first.
#
enabled_ovr=`svcprop -c -p general_ovr/enabled $1 2>/dev/null`
if [ -n "$enabled_ovr" ]; then
[ "$enabled_ovr" = "true" ] && return 0 || return 1
fi
enabled=`svcprop -c -p general/enabled $1 2>/dev/null`
[ -n "$enabled" -a "$enabled" = "true" ] && return 0 || return 1
}
#
# Return whether service is desired state
#
# Args: fmri state
# Return:
# 0 - desired state is service's current state
# 1 - desired state is not service's current state
#
service_check_state()
{
#
# Make sure we're done with ongoing state transition
#
while [ "`svcprop -p restarter/next_state $1`" != "$SMF_NONE" ]; do
sleep 1
done
[ "`svcprop -p restarter/state $1`" = "$2" ] && return 0 || return 1
}
#
# Deny/Allow list stores values in the form "host:addr", "network:addr/netmask",
# "pool:number", and "if:interface". This function returns the
# IP(addr or addr/netmask) value or a pool number.
#
get_IP()
{
value_is_interface $1 && return 1
echo "$1" | sed -n -e "s,^${PREFIX_POOL}\(.*\),pool/\1,p" \
-e "s,^${PREFIX_HOST}\(.*\),\1,p" \
-e "s,^${PREFIX_NET}\(.*\),\1,p" \
-e "s,^any,any,p"
}
get_interface()
{
value_is_interface $1 || return 1
scratch=`echo "$1" | sed -e "s/^${PREFIX_IF}//"`
ifconfig $scratch >/dev/null 2>&1 || return 1
echo $scratch | sed -e 's/:.*//'
}
#
#
#
value_is_interface()
{
[ -z "$1" ] && return 1
echo $1 | grep "^${PREFIX_IF}" >/dev/null 2>&1
}
#
# Remove rules in given file from active list without restarting ipfilter
#
remove_rules()
{
[ -f "$1" ] && ipf $2 -r -f $1 >/dev/null 2>&1
}
remove_nat_rules()
{
[ -f "$1" ] && ipnat -r -f $1 >/dev/null 2>&1
}
check_ipf_syntax()
{
ipf $2 -n -f $1 >/dev/null 2>&1
}
check_nat_syntax()
{
ipnat -n -f $1 >/dev/null 2>&1
}
unique_ports()
{
echo $* | xargs -n 1 echo | sort -u
}
file_get_ports()
{
ipf $2 -n -v -f $1 2>/dev/null | sed -n -e \
's/.*to.* port = \([a-z0-9]*\).*/\1/p' | uniq | \
awk '{if (length($0) > 1) {printf("%s ", $1)}}'
}
get_active_ports()
{
ipfstat $1 -io 2>/dev/null | sed -n -e \
's/.*to.* port = \([a-z0-9]*\).*/\1/p' | uniq | \
awk '{if (length($0) > 1) {printf("%s ",$1)}}'
}
#
# Given two list of ports, return failure if there's a duplicate.
#
sets_check_duplicate()
{
#
# If either list is empty, there isn't any conflict.
#
[ -z "$1" -o -z "$2" ] && return 0
for p in $1; do
for ap in $2; do
[ "$p" = "$ap" ] && return 1
done
done
return 0
}
#
# Given a file containing ipf rules, check the syntax and verify
# the rules don't conflict, use same port number, with active
# rules (ipfstat -io output).
#
update_check_ipf_rules()
{
check_ipf_syntax $1 $2 || return 1
lports=`file_get_ports $1 $2`
lactive_ports=`get_active_ports $2`
sets_check_duplicate "$lports" "$lactive_ports" || return 1
}
server_port_list=""
server_port_list_6=""
#
# Given a file containing ipf rules, check the syntax and verify
# the rules don't conflict with already processed services.
#
# The list of processed services' ports are maintained in the global
# variables 'server_port_list' and 'server_port_list_6'.
#
check_ipf_rules()
{
check_ipf_syntax $1 $2 || return 1
lports=`file_get_ports $1 $2`
if [ "$2" = "-6" ]; then
sets_check_duplicate "$lports" "$server_port_list_6" || return 1
server_port_list_6="$server_port_list_6 $lports"
else
sets_check_duplicate "$lports" "$server_port_list" || return 1
server_port_list="$server_port_list $lports"
fi
return 0
}
prepend_new_rules()
{
check_ipf_syntax $1 $2 && tail -r $1 | sed -e 's/^[a-z]/@0 &/' | \
ipf $2 -f - >/dev/null 2>&1
}
append_new_rules()
{
check_ipf_syntax $1 $2 && ipf $2 -f $1 >/dev/null 2>&1
}
append_new_nat_rules()
{
check_nat_syntax $1 && ipnat -f $1 >/dev/null 2>&1
}
#
# get port information from string of the form "proto:{port | port-port}"
#
tuple_get_port()
{
port_str=`echo "$1" | sed -e 's/ //g; s/.*://' 2>/dev/null`
[ -z "$port_str" ] && return 1
echo $port_str | grep "-" >/dev/null
if [ $? -eq 0 ]; then
echo $port_str | grep '^[0-9]\{1,5\}-[0-9]\{1,5\}$' >/dev/null || \
return 1
ports=`echo $port_str | ( IFS=- read a b ; \
[ $a \-le $b ] && echo $a $b || echo $b $a )`
for p in $ports; do
[ $p -gt 65535 ] && return 1
done
echo "$ports"
else
#
# port_str is a single port, verify and return it.
#
echo "$port_str" | grep '^[0-9]\{1,5\}$' >/dev/null || return 1
[ $port_str -gt 65535 ] && return 1
echo "$port_str"
fi
}
#
# get proto info from string of the form "{tcp | udp}:port"
#
tuple_get_proto()
{
proto=`echo "$1" | sed -e 's/ //g; s/:.*//' 2>/dev/null`
[ -z "$proto" ] && return 0
[ "$proto" = "tcp" -o "$proto" = "udp" ] && echo $proto || return 1
return 0
}
ipf_get_lock()
{
newpid=$$
if [ -f "$IPF_LOCK/pid" ]; then
curpid=`cat $IPF_LOCK/pid 2>/dev/null`
[ "$curpid" = "$newpid" ] && return 0
#
# Clear lock if the owning process is no longer around.
#
ps -p $curpid >/dev/null 2>&1 || rm -r $IPF_LOCK >/dev/null 2>&1
fi
#
# Grab the lock
#
while :; do
mkdir $IPF_LOCK 2>/dev/null && break;
sleep 1
done
echo $newpid > $IPF_LOCK/pid
}
#
# Remove lock if it's ours
#
ipf_remove_lock()
{
if [ -f "$IPF_LOCK/pid" ]; then
[ "`cat $IPF_LOCK/pid`" = "$$" ] && rm -r $IPF_LOCK
fi
return 0
}
#
# Make IPFILCONF, /var/tmp/ipf/ipf.conf, a symlink to the input file argument.
#
custom_set_symlink()
{
#
# Nothing to do if the input file doesn't exist.
#
[ ! -f "$1" ] && return 0
check_ipf_dir || return 1
rm $IPFILCONF >/dev/null 2>&1
ln -s $1 $IPFILCONF >/dev/null 2>&1
}
#
# New file replaces original file if they have different content
#
replace_file()
{
orig=$1
new=$2
#
# IPFILCONF may be a symlink, remove it if that's the case
#
if [ -L "$orig" ]; then
rm $orig
touch $orig
fi
check_ipf_dir || return 1
mv $new $orig && return 0 || return 1
}
#
# Given a service, gets the following details for ipf rule:
# - policy
# - protocol
# - port(IANA port obtained by running servinfo)
#
process_server_svc()
{
service=$1
policy=`get_policy ${service}`
#
# Empties service's rules file so callers won't use existing rule if
# we fail here.
#
file=`fmri_to_file $service $IPF_SUFFIX`
file6=`fmri_to_file $service $IPF6_SUFFIX`
[ -z "$file" ] && return 1
echo "# $service" >${file}
echo "# $service" >${file6}
#
# Nothing to do if policy is "use_global"
#
[ "$policy" = "use_global" ] && return 0
restarter=`svcprop -p general/restarter $service 2>/dev/null`
if [ "$restarter" = "$INETDFMRI" ]; then
iana_name=`svcprop -p inetd/name $service 2>/dev/null`
isrpc=`svcprop -p inetd/isrpc $service 2>/dev/null`
else
iana_name=`svcprop -p $FW_CONTEXT_PG/name $service 2>/dev/null`
isrpc=`svcprop -p $FW_CONTEXT_PG/isrpc $service 2>/dev/null`
fi
#
# Bail if iana_name isn't defined. Services with static rules
# like nis/client don't need to generate rules using
# iana name and protocol information.
#
[ -z "$iana_name" ] && return 1
#
# RPC services
#
if [ "$isrpc" = "true" ]; then
# The ports used for IPv6 are usually also reachable
# through IPv4, so generate IPv4 rules for them, too.
tports=`$SERVINFO -R -p -t -s $iana_name 2>/dev/null`
tports6=`$SERVINFO -R -p -t6 -s $iana_name 2>/dev/null`
if [ -n "$tports" -o -n "$tports6" ]; then
tports=`unique_ports $tports $tports6`
for tport in $tports; do
generate_rules $service $policy "tcp" \
$tport $file
done
fi
if [ -n "$tports6" ]; then
for tport6 in $tports6; do
generate_rules $service $policy "tcp" \
$tport6 $file6 _6
done
fi
uports=`$SERVINFO -R -p -u -s $iana_name 2>/dev/null`
uports6=`$SERVINFO -R -p -u6 -s $iana_name 2>/dev/null`
if [ -n "$uports" ]; then
uports=`unique_ports $uports $uports6`
for uport in $uports; do
generate_rules $service $policy "udp" \
$uport $file
done
fi
if [ -n "$uports6" ]; then
for uport6 in $uports6; do
generate_rules $service $policy "udp" \
$uport6 $file6 _6
done
fi
return 0
fi
#
# Get the IANA port and supported protocols(tcp and udp)
#
tport=`$SERVINFO -p -t -s $iana_name 2>&1`
if [ $? -eq 0 -a -n "$tport" ]; then
generate_rules $service $policy "tcp" $tport $file
fi
tport6=`$SERVINFO -p -t6 -s $iana_name 2>&1`
if [ $? -eq 0 -a -n "$tport6" ]; then
generate_rules $service $policy "tcp" $tport6 $file6 _6
fi
uport=`$SERVINFO -p -u -s $iana_name 2>&1`
if [ $? -eq 0 -a -n "$uport" ]; then
generate_rules $service $policy "udp" $uport $file
fi
uport6=`$SERVINFO -p -u6 -s $iana_name 2>&1`
if [ $? -eq 0 -a -n "$uport6" ]; then
generate_rules $service $policy "udp" $uport6 $file6 _6
fi
return 0
}
#
# Given a service's name, policy, protocol and port, generate ipf rules
# - list of host/network/interface to apply policy
#
# A 'use_global' policy inherits the system-wided Global Default policy
# from network/ipfilter. For {deny | allow} policies, the rules are
# ordered as:
#
# - make exceptions to policy for those in "exceptions" list
# - apply policy to those specified in "apply_to" list
# - policy rule
#
generate_rules()
{
service=$1
mypolicy=$2
proto=$3
port=$4
out=$5
_6=$6
#
# Default mode is to inherit from global's policy
#
[ "$mypolicy" = "use_global" ] && return 0
tcp_opts=""
[ "$proto" = "tcp" ] && tcp_opts="flags S keep state keep frags"
block_policy=`get_block_policy $1`
if [ "$block_policy" = "use_global" ]; then
block_policy=${GLOBAL_BLOCK_POLICY}
fi
if [ "$block_policy" = "return" ]; then
[ "$proto" = "tcp" ] && block_policy="return-rst"
[ "$proto" != "tcp" ] && block_policy="return-icmp-as-dest"
else
block_policy=""
fi
iplist=`get_target${_6}_list $service`
#
# Allow all if policy is 'none'
#
if [ "$mypolicy" = "none" ]; then
for ip in $iplist; do
daddr=`get_IP ${ip}`
[ -z "$daddr" -o "$daddr" = '""' ] && continue
echo "pass in log quick proto ${proto} from any to ${daddr}" \
"port = ${port} ${tcp_opts}" >>${out}
done
return 0
fi
#
# For now, let's concern ourselves only with incoming traffic.
#
[ "$mypolicy" = "deny" ] && { ecmd="pass"; acmd="block ${block_policy}"; }
[ "$mypolicy" = "allow" ] && { ecmd="block ${block_policy}"; acmd="pass"; }
for name in `get_exceptions${_6} $service`; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
for ip in $iplist; do
daddr=`get_IP ${ip}`
[ -z "$daddr" -o "$daddr" = '""' ] && continue
echo "${ecmd} in log quick on ${ifc} from any to" \
"${daddr} port = ${port}" >>${out}
done
continue
fi
saddr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$saddr" ]; then
for ip in $iplist; do
daddr=`get_IP ${ip}`
[ -z "$daddr" -o "$daddr" = '""' ] && continue
echo "${ecmd} in log quick proto ${proto} from ${saddr}" \
"to ${daddr} port = ${port} ${tcp_opts}" >>${out}
done
fi
done
for name in `get_apply2${_6}_list $service`; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
for ip in $iplist; do
daddr=`get_IP ${ip}`
[ -z "$daddr" -o "$daddr" = '""' ] && continue
echo "${acmd} in log quick on ${ifc} from any to" \
"${daddr} port = ${port}" >>${out}
done
continue
fi
saddr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$saddr" ]; then
for ip in $iplist; do
daddr=`get_IP ${ip}`
[ -z "$daddr" -o "$daddr" = '""' ] && continue
echo "${acmd} in log quick proto ${proto} from ${saddr}" \
"to ${daddr} port = ${port} ${tcp_opts}" >>${out}
done
fi
done
for ip in $iplist; do
daddr=`get_IP ${ip}`
[ -z "$daddr" -o "$daddr" = '""' ] && continue
echo "${ecmd} in log quick proto ${proto} from any to ${daddr}" \
"port = ${port} ${tcp_opts}" >>${out}
done
return 0
}
#
# Service has either IANA ports and proto or its own firewall method to
# generate the rules.
#
# - if service has a custom method, use it to populate its rules
# - if service has a firewall_config pg, use process_server_svc
#
# Argument - fmri
#
process_service()
{
#
# Don't process network/ipfilter
#
[ "$1" = "$IPF_FMRI" ] && return 0
service_check_state $1 $SMF_MAINT && return 1
method=`svcprop -p $FW_CONTEXT_PG/$METHOD_PROP $1 2>/dev/null | \
sed 's/\\\//g'`
if [ -n "$method" -a "$method" != '""' ]; then
( exec $method $1 >/dev/null )
else
svcprop -p $FW_CONFIG_PG $1 >/dev/null 2>&1 || return 1
process_server_svc $1 || return 1
fi
return 0
}
#
# Generate rules for protocol/port defined in firewall_config_default/open_ports
# property. These are non-service programs whose network resource info are
# defined as "{tcp | upd}:{PORT | PORT-PORT}". Essentially, these programs need
# some specific local ports to be opened. For example, BitTorrent clients need to
# have 6881-6889 opened.
#
process_nonsvc_progs()
{
out=$1
echo "# Non-service programs rules" >>${out}
progs=`global_get_prop_value $FW_CONFIG_DEF_PG $OPEN_PORTS_PROP`
for prog in $progs; do
[ -z "$prog" -o "$prog" = '""' ] && continue
port=`tuple_get_port $prog`
[ $? -eq 1 -o -z "$port" ] && continue
proto=`tuple_get_proto $prog`
[ $? -eq 1 ] && continue
set -- $port
if [ $# -gt 1 ]; then
if [ -z "$proto" ]; then
echo "pass in log quick from any to any" \
"port ${1} >< ${2}" >>${out}
else
echo "pass in log quick proto ${proto} from any" \
"to any port ${1} >< ${2}" >>${out}
fi
else
if [ -z "$proto" ]; then
echo "pass in log quick from any to any" \
"port = ${1}" >>${out}
else
echo "pass in log quick proto ${proto} from any" \
"to any port = ${1}" >>${out}
fi
fi
done
return 0
}
#
# Generate a new /etc/ipf/ipf.conf. If firewall policy is 'none',
# ipf.conf is empty .
#
create_global_rules()
{
if [ "$GLOBAL_POLICY" = "custom" ]; then
file=`global_get_prop_value $FW_CONFIG_DEF_PG $CUSTOM_FILE_PROP`
file6=`global_get_prop_value $FW_CONFIG_DEF_PG $CUSTOM_FILE_6_PROP`
[ -n "$file" ] && custom_set_symlink $file
[ -n "$file6" ] && custom_set_symlink $file6
return 0
fi
TEMP=`mktemp /var/run/ipf.conf.pid$$.XXXXXX`
TEMP6=`mktemp /var/run/ipf6.conf.pid$$.XXXXXX`
process_nonsvc_progs $TEMP
process_nonsvc_progs $TEMP6
echo "# Global Default rules" >>${TEMP}
echo "# Global Default rules" >>${TEMP6}
if [ "$GLOBAL_POLICY" != "none" ]; then
echo "pass out log quick all keep state" >>${TEMP}
echo "pass out log quick all keep state" >>${TEMP6}
fi
case "$GLOBAL_POLICY" in
'none')
# No rules
replace_file ${IPFILCONF} ${TEMP}
replace_file ${IP6FILCONF} ${TEMP6}
return $?
;;
'deny')
ecmd="pass"
acmd="block"
;;
'allow')
ecmd="block"
acmd="pass"
;;
*)
return 1;
;;
esac
for name in `global_get_prop_value $FW_CONFIG_DEF_PG $EXCEPTIONS_PROP`; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
echo "${ecmd} in log quick on ${ifc} all" >>${TEMP}
continue
fi
addr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$addr" ]; then
echo "${ecmd} in log quick from ${addr} to any" >>${TEMP}
fi
done
for name in `global_get_prop_value $FW_CONFIG_DEF_PG $EXCEPTIONS_6_PROP`; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
echo "${ecmd} in log quick on ${ifc} all" >>${TEMP6}
continue
fi
addr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$addr" ]; then
echo "${ecmd} in log quick from ${addr} to any" >>${TEMP6}
fi
done
for name in `global_get_prop_value $FW_CONFIG_DEF_PG $APPLY2_PROP`; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
echo "${acmd} in log quick on ${ifc} all" >>${TEMP}
continue
fi
addr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$addr" ]; then
echo "${acmd} in log quick from ${addr} to any" >>${TEMP}
fi
done
for name in `global_get_prop_value $FW_CONFIG_DEF_PG $APPLY2_6_PROP`; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
echo "${acmd} in log quick on ${ifc} all" >>${TEMP6}
continue
fi
addr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$addr" ]; then
echo "${acmd} in log quick from ${addr} to any" >>${TEMP6}
fi
done
if [ "$GLOBAL_POLICY" = "allow" ]; then
#
# Allow DHCP(v6) traffic if running as a DHCP client
#
/sbin/netstrategy | grep dhcp >/dev/null 2>&1
if [ $? -eq 0 ]; then
echo "pass out log quick from any port = 68" \
"keep state" >>${TEMP}
echo "pass in log quick from any to any port = 68" >>${TEMP}
echo "pass out log quick from any port = 546" \
"keep state" >>${TEMP6}
echo "pass in log quick from any to any port = 546" >>${TEMP6}
fi
echo "block in log all" >>${TEMP}
echo "block in log all" >>${TEMP6}
fi
replace_file ${IPFILCONF} ${TEMP}
replace_file ${IP6FILCONF} ${TEMP6}
return $?
}
#
# Generate a new /etc/ipf/ipf_ovr.conf, the override system-wide policy. It's
# a simplified policy that doesn't support 'exceptions' entities.
#
# If firewall policy is "none", no rules are generated.
#
# Note that "pass" rules don't have "quick" as we don't want
# them to override services' block rules.
#
create_global_ovr_rules()
{
#
# Simply empty override file if global policy is 'custom'
#
if [ "$GLOBAL_POLICY" = "custom" ]; then
echo "# 'custom' global policy" >$IPFILOVRCONF
echo "# 'custom' global policy" >$IP6FILOVRCONF
return 0
fi
#
# Get and process override policy
#
ovr_policy=`global_get_prop_value $FW_CONFIG_OVR_PG $POLICY_PROP`
if [ "$ovr_policy" = "none" ]; then
echo "# global override policy is 'none'" >$IPFILOVRCONF
echo "# global override policy is 'none'" >$IP6FILOVRCONF
return 0
fi
TEMP=`mktemp /var/run/ipf_ovr.conf.pid$$.XXXXXX`
[ "$ovr_policy" = "deny" ] && acmd="block in log quick"
[ "$ovr_policy" = "allow" ] && acmd="pass in log"
apply2_list=`global_get_prop_value $FW_CONFIG_OVR_PG $APPLY2_PROP`
for name in $apply2_list; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
echo "${acmd} on ${ifc} all" >>${TEMP}
continue
fi
addr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$addr" ]; then
echo "${acmd} from ${addr} to any" >>${TEMP}
fi
done
apply2_6_list=`global_get_prop_value $FW_CONFIG_OVR_PG $APPLY2_6_PROP`
for name in $apply2_6_list; do
[ -z "$name" -o "$name" = '""' ] && continue
ifc=`get_interface $name`
if [ $? -eq 0 -a -n "$ifc" ]; then
echo "${acmd} on ${ifc} all" >>${TEMP6}
continue
fi
addr=`get_IP ${name}`
if [ $? -eq 0 -a -n "$addr" ]; then
echo "${acmd} from ${addr} to any" >>${TEMP6}
fi
done
replace_file ${IPFILOVRCONF} ${TEMP}
replace_file ${IP6FILOVRCONF} ${TEMP6}
return $?
}
#
# Service is put into maintenance state due to its invalid firewall
# definition and/or policy.
#
svc_mark_maintenance()
{
svcadm mark maintenance $1 >/dev/null 2>&1
date=`date`
echo "[ $date ${0}: $1 has invalid ipf configuration. ]"
echo "[ $date ${0}: placing $1 in maintenance. ]"
#
# Move service's rule files to another location since
# they're most likely invalid.
#
ipfile=`fmri_to_file $1 $IPF_SUFFIX`
[ -f "$ipfile" ] && mv $ipfile "$ipfile.bak"
ip6file=`fmri_to_file $1 $IPF6_SUFFIX`
[ -f "$ip6file" ] && mv $ip6file "$ip6file.bak"
natfile=`fmri_to_file $1 $NAT_SUFFIX`
[ -f "$natfile" ] && mv $natfile "$natfile.bak"
return 0
}
svc_is_server()
{
svcprop -p $FW_CONFIG_PG $1 >/dev/null 2>&1
}
#
# Create rules for enabled firewalling and client services.
# - obtain the list of enabled services and process them
# - save the list of rules file for later use
#
create_services_rules()
{
#
# Do nothing if global policy is 'custom'
#
[ "$GLOBAL_POLICY" = "custom" ] && return 0
ipf_get_lock
#
# Get all enabled services
#
allsvcs=`svcprop -cf -p general/enabled -p general_ovr/enabled '*' \
2>/dev/null | sed -n 's,^\(svc:.*\)/:properties/.* true$,\1,p' | sort -u`
#
# Process enabled services
#
for s in $allsvcs; do
service_is_enabled $s || continue
process_service $s || continue
ipfile=`fmri_to_file $s $IPF_SUFFIX`
if [ -n "$ipfile" -a -r "$ipfile" ]; then
check_ipf_syntax $ipfile
if [ $? -ne 0 ]; then
svc_mark_maintenance $s
continue
fi
svc_is_server $s
if [ $? -eq 0 ]; then
check_ipf_rules $ipfile
if [ $? -ne 0 ]; then
svc_mark_maintenance $s
continue
fi
fi
CONF_FILES="$CONF_FILES $ipfile"
fi
ip6file=`fmri_to_file $s $IPF6_SUFFIX`
if [ -n "$ip6file" -a -r "$ip6file" ]; then
check_ipf_syntax $ip6file -6
if [ $? -ne 0 ]; then
svc_mark_maintenance $s
continue
fi
svc_is_server $s
if [ $? -eq 0 ]; then
check_ipf_rules $ip6file -6
if [ $? -ne 0 ]; then
svc_mark_maintenance $s
continue
fi
fi
CONF6_FILES="$CONF6_FILES $ip6file"
fi
natfile=`fmri_to_file $s $NAT_SUFFIX`
if [ -n "$natfile" -a -r "$natfile" ]; then
check_nat_syntax $natfile
if [ $? -ne 0 ]; then
svc_mark_maintenance $s
continue
fi
NAT_FILES="$NAT_FILES $natfile"
fi
done
ipf_remove_lock
return 0
}
#
# We update a services ipf ruleset in the following manners:
# - service is disabled, tear down its rules.
# - service is disable or refreshed(online), setup or update its rules.
#
service_update_rules()
{
svc=$1
ipfile=`fmri_to_file $svc $IPF_SUFFIX`
ip6file=`fmri_to_file $svc $IPF6_SUFFIX`
[ -n "$ipfile" ] && remove_rules $ipfile
[ -n "$ip6file" ] && remove_rules $ip6file -6
[ -z "$ipfile" -a -z "$ip6file" ] && return 0
natfile=`fmri_to_file $svc $NAT_SUFFIX`
[ -n "$natfile" ] && remove_nat_rules $natfile
#
# Don't go further if service is disabled or in maintenance.
#
service_is_enabled $svc || return 0
service_check_state $1 $SMF_MAINT && return 0
process_service $svc || return 1
if [ -f "$ipfile" ]; then
check_ipf_syntax $ipfile
if [ $? -ne 0 ]; then
svc_mark_maintenance $svc
return 1
fi
fi
if [ -f "$ip6file" ]; then
check_ipf_syntax $ip6file -6
if [ $? -ne 0 ]; then
svc_mark_maintenance $svc
return 1
fi
fi
if [ -f "$natfile" ]; then
check_nat_syntax $natfile
if [ $? -ne 0 ]; then
svc_mark_maintenance $svc
return 1
fi
fi
if [ -f "$ipfile" ]; then
svc_is_server $svc
if [ $? -eq 0 ]; then
update_check_ipf_rules $ipfile
if [ $? -ne 0 ]; then
svc_mark_maintenance $svc
return 1
fi
fi
prepend_new_rules $ipfile
#
# reload Global Override rules to
# maintain correct ordering.
#
remove_rules $IPFILOVRCONF
prepend_new_rules $IPFILOVRCONF
fi
if [ -f "$ip6file" ]; then
svc_is_server $svc
if [ $? -eq 0 ]; then
update_check_ipf_rules $ip6file -6
if [ $? -ne 0 ]; then
svc_mark_maintenance $svc
return 1
fi
fi
prepend_new_rules $ip6file -6
#
# reload Global Override rules to
# maintain correct ordering.
#
remove_rules $IP6FILOVRCONF -6
prepend_new_rules $IP6FILOVRCONF -6
fi
[ -f "$natfile" ] && append_new_nat_rules $natfile
return 0
}
#
# Call the service_update_rules with appropriate svc fmri.
#
# This is called from '/lib/svc/method/ipfilter fw_update' whenever
# a service is disabled/enabled/refreshed.
#
service_update()
{
svc=$1
ret=0
#
# If ipfilter isn't online or global policy is 'custom',
# nothing should be done.
#
[ "$GLOBAL_POLICY" = "custom" ] && return 0
service_check_state $SMF_FMRI $SMF_ONLINE || return 0
ipf_get_lock
service_update_rules $svc || ret=1
ipf_remove_lock
return $ret
}
#
# Initialize global configuration
#
global_init