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-rw-r--r--package/firewall/files/lib/fw.sh111
1 files changed, 98 insertions, 13 deletions
diff --git a/package/firewall/files/lib/fw.sh b/package/firewall/files/lib/fw.sh
index 896947241a..647bcd6a54 100644
--- a/package/firewall/files/lib/fw.sh
+++ b/package/firewall/files/lib/fw.sh
@@ -137,10 +137,13 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
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 $tab ; then
@@ -159,13 +162,29 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
fi
fi
- local cmdline="$app --table ${tab} --${cmd} ${chn} ${pol} ${pos} ${tgt:+--jump "$tgt"}"
+ local cmdline="$app --table ${tab} --${cmd} ${chn} ${pol} ${rule_offset:-${pos}} ${tgt:+--jump "$tgt"}"
while [ $# -gt 1 ]; do
- case "$app:$1" in
- ip6tables:--icmp-type) cmdline="$cmdline --icmpv6-type" ;;
- ip6tables:icmp|ip6tables:ICMP) cmdline="$cmdline icmpv6" ;;
- iptables:--icmpv6-type) cmdline="$cmdline --icmp-type" ;;
- iptables:icmpv6) cmdline="$cmdline icmp" ;;
+ # special parameter handling
+ case "$1:$2" in
+ -p:icmp*|--protocol:icmp*)
+ [ "$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
@@ -175,7 +194,10 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
$cmdline
- fw__rc $?
+ local rv=$?
+ [ $rv -eq 0 ] && [ -n "$rule_offset" ] && \
+ export -- "FW__RULE_OFS_${app}_${tab}_${chn}=$(($rule_offset + 1))"
+ fw__rc $rv
}
fw_get_port_range() {
@@ -189,8 +211,8 @@ fw_get_port_range() {
local _first=${_ports%-*}
local _last=${_ports#*-}
- if [ "$_first" != "$_last" ]; then
- export -- "$_var=$_first$_delim$_last"
+ if [ "${_first#!}" != "${_last#!}" ]; then
+ export -- "$_var=$_first$_delim${_last#!}"
else
export -- "$_var=$_first"
fi
@@ -221,11 +243,11 @@ fw_get_family_mode() {
fw_get_negation() {
local _var="$1"
local _flag="$2"
- local _ipaddr="$3"
+ local _value="$3"
- [ "${_ipaddr#!}" != "$_ipaddr" ] && \
- export -n -- "$_var=! $_flag ${_ipaddr#!}" || \
- export -n -- "$_var=${_ipaddr:+$_flag $_ipaddr}"
+ [ "${_value#!}" != "$_value" ] && \
+ export -n -- "$_var=! $_flag ${_value#!}" || \
+ export -n -- "$_var=${_value:+$_flag $_value}"
}
fw_get_subnet4() {
@@ -245,3 +267,66 @@ fw_get_subnet4() {
*) export -n -- "$_var=" ;;
esac
}
+
+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;
+ /router-advertisement/d;
+ /router-solicitation/d;
+ 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
+}