You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
325 lines
6.8 KiB
Bash
325 lines
6.8 KiB
Bash
# Copyright (C) 2009-2010 OpenWrt.org
|
|
# Copyright (C) 2009 Malte S. Stretz
|
|
|
|
export FW_4_ERROR=0
|
|
export FW_6_ERROR=0
|
|
export FW_i_ERROR=0
|
|
export FW_e_ERROR=0
|
|
export FW_a_ERROR=0
|
|
|
|
#TODO: remove this
|
|
[ "${-#*x}" == "$-" ] && {
|
|
fw() {
|
|
fw__exec "$@"
|
|
}
|
|
} || {
|
|
fw() {
|
|
local os=$-
|
|
set +x
|
|
fw__exec "$@"
|
|
local rc=$?
|
|
set -$os
|
|
return $rc
|
|
}
|
|
}
|
|
|
|
fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
|
|
local cmd fam tab chn tgt pos
|
|
local i
|
|
for i in cmd fam tab chn tgt pos; do
|
|
if [ "$1" -a "$1" != '{' ]; then
|
|
eval "$i='$1'"
|
|
shift
|
|
else
|
|
eval "$i=-"
|
|
fi
|
|
done
|
|
|
|
fw__rc() {
|
|
export FW_${fam#G}_ERROR=$1
|
|
return $1
|
|
}
|
|
|
|
fw__dualip() {
|
|
fw $cmd 4 $tab $chn $tgt $pos "$@"
|
|
fw $cmd 6 $tab $chn $tgt $pos "$@"
|
|
fw__rc $((FW_4_ERROR | FW_6_ERROR))
|
|
}
|
|
|
|
fw__autoip() {
|
|
local ip4 ip6
|
|
shift
|
|
while [ "$1" != '}' ]; do
|
|
case "$1" in
|
|
*:*) ip6=1 ;;
|
|
*.*.*.*) ip4=1 ;;
|
|
esac
|
|
shift
|
|
done
|
|
shift
|
|
if [ "${ip4:-4}" == "${ip6:-6}" ]; then
|
|
echo "fw: can't mix ip4 and ip6" >&2
|
|
return 1
|
|
fi
|
|
local ver=${ip4:+4}${ip6:+6}
|
|
fam=i
|
|
fw $cmd ${ver:-i} $tab $chn $tgt $pos "$@"
|
|
fw__rc $?
|
|
}
|
|
|
|
fw__has() {
|
|
local tab=${1:-$tab}
|
|
if [ $tab == '-' ]; then
|
|
type $app > /dev/null 2> /dev/null
|
|
fw__rc $(($? & 1))
|
|
return
|
|
fi
|
|
[ "$app" != ip6tables ] || [ "$tab" != nat ]
|
|
fw__rc $?
|
|
}
|
|
|
|
fw__err() {
|
|
local err
|
|
eval "err=\$FW_${fam}_ERROR"
|
|
fw__rc $err
|
|
}
|
|
|
|
local app=
|
|
local pol=
|
|
case "$fam" in
|
|
*4) [ $FW_DISABLE_IPV4 == 0 ] && app=iptables || return ;;
|
|
*6) [ $FW_DISABLE_IPV6 == 0 ] && app=ip6tables || return ;;
|
|
i) fw__dualip "$@"; return ;;
|
|
I) fw__autoip "$@"; return ;;
|
|
e) app=ebtables ;;
|
|
a) app=arptables ;;
|
|
-) fw $cmd i $tab $chn $tgt $pos "$@"; return ;;
|
|
*) return 254 ;;
|
|
esac
|
|
case "$tab" in
|
|
f) tab=filter ;;
|
|
m) tab=mangle ;;
|
|
n) tab=nat ;;
|
|
r) tab=raw ;;
|
|
-) tab=filter ;;
|
|
esac
|
|
case "$cmd:$chn:$tgt:$pos" in
|
|
add:*:-:*) cmd=new-chain ;;
|
|
add:*:*:-) cmd=append ;;
|
|
add:*:*:$) cmd=append ;;
|
|
add:*:*:*) cmd=insert ;;
|
|
del:-:*:*) cmd=delete-chain; fw flush $fam $tab ;;
|
|
del:*:-:*) cmd=delete-chain; fw flush $fam $tab $chn ;;
|
|
del:*:*:*) cmd=delete ;;
|
|
flush:*) ;;
|
|
policy:*) pol=$tgt; tgt=- ;;
|
|
has:*) fw__has; return ;;
|
|
err:*) fw__err; return ;;
|
|
list:*) cmd="numeric --verbose --$cmd" ;;
|
|
*) return 254 ;;
|
|
esac
|
|
case "$chn" in
|
|
-) chn= ;;
|
|
esac
|
|
case "$tgt" in
|
|
-) tgt= ;;
|
|
esac
|
|
|
|
local rule_offset
|
|
case "$pos" in
|
|
^) pos=1 ;;
|
|
$) pos= ;;
|
|
-) pos= ;;
|
|
+) eval "rule_offset=\${FW__RULE_OFS_${app}_${tab}_${chn}:-1}" ;;
|
|
esac
|
|
|
|
if ! fw__has - family || ! fw__has $tab ; then
|
|
export FW_${fam}_ERROR=0
|
|
return 0
|
|
fi
|
|
|
|
case "$fam" in
|
|
G*) shift; while [ $# -gt 0 ] && [ "$1" != "{" ]; do shift; done ;;
|
|
esac
|
|
|
|
if [ $# -gt 0 ]; then
|
|
shift
|
|
if [ $cmd == delete ]; then
|
|
pos=
|
|
fi
|
|
fi
|
|
|
|
local cmdline="$app --table ${tab} --${cmd} ${chn} ${pol} ${rule_offset:-${pos}} ${tgt:+--jump "$tgt"}"
|
|
while [ $# -gt 1 ]; do
|
|
# special parameter handling
|
|
case "$1:$2" in
|
|
-p:icmp*|-p:1|-p:58|--protocol:icmp*|--protocol:1|--protocol:58)
|
|
[ "$app" = ip6tables ] && \
|
|
cmdline="$cmdline -p icmpv6" || \
|
|
cmdline="$cmdline -p icmp"
|
|
shift
|
|
;;
|
|
--icmp-type:*|--icmpv6-type:*)
|
|
local icmp_type
|
|
if [ "$app" = ip6tables ] && fw_check_icmptype6 icmp_type "$2"; then
|
|
cmdline="$cmdline $icmp_type"
|
|
elif [ "$app" = iptables ] && fw_check_icmptype4 icmp_type "$2"; then
|
|
cmdline="$cmdline $icmp_type"
|
|
else
|
|
local fam=IPv4; [ "$app" = ip6tables ] && fam=IPv6
|
|
fw_log info "ICMP type '$2' is not valid for $fam address family, skipping rule"
|
|
return 1
|
|
fi
|
|
shift
|
|
;;
|
|
*) cmdline="$cmdline $1" ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
[ -n "$FW_TRACE" ] && echo $cmdline >&2
|
|
|
|
$cmdline
|
|
|
|
local rv=$?
|
|
[ $rv -eq 0 ] && [ -n "$rule_offset" ] && \
|
|
export -- "FW__RULE_OFS_${app}_${tab}_${chn}=$(($rule_offset + 1))"
|
|
fw__rc $rv
|
|
}
|
|
|
|
fw_get_port_range() {
|
|
local _var=$1
|
|
local _ports=$2
|
|
local _delim=${3:-:}
|
|
if [ "$4" ]; then
|
|
fw_get_port_range $_var "${_ports}-${4}" $_delim
|
|
return
|
|
fi
|
|
|
|
local _first=${_ports%-*}
|
|
local _last=${_ports#*-}
|
|
if [ "${_first#!}" != "${_last#!}" ]; then
|
|
export -- "$_var=$_first$_delim${_last#!}"
|
|
else
|
|
export -- "$_var=$_first"
|
|
fi
|
|
}
|
|
|
|
fw_get_family_mode() {
|
|
local _var="$1"
|
|
local _hint="$2"
|
|
local _zone="$3"
|
|
local _mode="$4"
|
|
|
|
local _ipv4 _ipv6
|
|
[ "$_zone" != "*" ] && {
|
|
[ -n "$FW_ZONES4$FW_ZONES6" ] && {
|
|
list_contains FW_ZONES4 "$_zone" && _ipv4=1 || _ipv4=0
|
|
list_contains FW_ZONES6 "$_zone" && _ipv6=1 || _ipv6=0
|
|
} || {
|
|
_ipv4=$(uci_get_state firewall core "${_zone}_ipv4" 0)
|
|
_ipv6=$(uci_get_state firewall core "${_zone}_ipv6" 0)
|
|
}
|
|
} || {
|
|
_ipv4=1
|
|
_ipv6=1
|
|
}
|
|
|
|
case "$_hint:$_ipv4:$_ipv6" in
|
|
*4:1:*|*:1:0) export -n -- "$_var=G4" ;;
|
|
*6:*:1|*:0:1) export -n -- "$_var=G6" ;;
|
|
*) export -n -- "$_var=$_mode" ;;
|
|
esac
|
|
}
|
|
|
|
fw_get_negation() {
|
|
local _var="$1"
|
|
local _flag="$2"
|
|
local _value="$3"
|
|
|
|
[ "${_value#!}" != "$_value" ] && \
|
|
export -n -- "$_var=! $_flag ${_value#!}" || \
|
|
export -n -- "$_var=${_value:+$_flag $_value}"
|
|
}
|
|
|
|
fw_get_subnet4() {
|
|
local _var="$1"
|
|
local _flag="$2"
|
|
local _name="$3"
|
|
|
|
local _ipaddr="$(uci_get_state network "${_name#!}" ipaddr)"
|
|
local _netmask="$(uci_get_state network "${_name#!}" netmask)"
|
|
|
|
case "$_ipaddr" in
|
|
*.*.*.*)
|
|
[ "${_name#!}" != "$_name" ] && \
|
|
export -n -- "$_var=! $_flag $_ipaddr/${_netmask:-255.255.255.255}" || \
|
|
export -n -- "$_var=$_flag $_ipaddr/${_netmask:-255.255.255.255}"
|
|
return 0
|
|
;;
|
|
esac
|
|
|
|
export -n -- "$_var="
|
|
return 1
|
|
}
|
|
|
|
fw_check_icmptype4() {
|
|
local _var="$1"
|
|
local _type="$2"
|
|
case "$_type" in
|
|
![0-9]*) export -n -- "$_var=! --icmp-type ${_type#!}"; return 0 ;;
|
|
[0-9]*) export -n -- "$_var=--icmp-type $_type"; return 0 ;;
|
|
esac
|
|
|
|
[ -z "$FW_ICMP4_TYPES" ] && \
|
|
export FW_ICMP4_TYPES=$(
|
|
iptables -p icmp -h 2>/dev/null | \
|
|
sed -n -e '/^Valid ICMP Types:/ {
|
|
n; :r; s/[()]/ /g; s/[[:space:]]\+/\n/g; p; n; b r
|
|
}' | sort -u
|
|
)
|
|
|
|
local _check
|
|
for _check in $FW_ICMP4_TYPES; do
|
|
if [ "$_check" = "${_type#!}" ]; then
|
|
[ "${_type#!}" != "$_type" ] && \
|
|
export -n -- "$_var=! --icmp-type ${_type#!}" || \
|
|
export -n -- "$_var=--icmp-type $_type"
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
export -n -- "$_var="
|
|
return 1
|
|
}
|
|
|
|
fw_check_icmptype6() {
|
|
local _var="$1"
|
|
local _type="$2"
|
|
case "$_type" in
|
|
![0-9]*) export -n -- "$_var=! --icmpv6-type ${_type#!}"; return 0 ;;
|
|
[0-9]*) export -n -- "$_var=--icmpv6-type $_type"; return 0 ;;
|
|
esac
|
|
|
|
[ -z "$FW_ICMP6_TYPES" ] && \
|
|
export FW_ICMP6_TYPES=$(
|
|
ip6tables -p icmpv6 -h 2>/dev/null | \
|
|
sed -n -e '/^Valid ICMPv6 Types:/ {
|
|
n; :r; s/[()]/ /g; s/[[:space:]]\+/\n/g; p; n; b r
|
|
}' | sort -u
|
|
)
|
|
|
|
local _check
|
|
for _check in $FW_ICMP6_TYPES; do
|
|
if [ "$_check" = "${_type#!}" ]; then
|
|
[ "${_type#!}" != "$_type" ] && \
|
|
export -n -- "$_var=! --icmpv6-type ${_type#!}" || \
|
|
export -n -- "$_var=--icmpv6-type $_type"
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
export -n -- "$_var="
|
|
return 1
|
|
}
|