+++ /dev/null
-# Copyright (C) 2009-2011 OpenWrt.org
-# Copyright (C) 2008 John Crispin <blogic@openwrt.org>
-
-FW_INITIALIZED=
-
-FW_ZONES=
-FW_ZONES4=
-FW_ZONES6=
-FW_CONNTRACK_ZONES=
-FW_NOTRACK_DISABLED=
-
-FW_DEFAULTS_APPLIED=
-FW_ADD_CUSTOM_CHAINS=
-FW_ACCEPT_REDIRECTS=
-FW_ACCEPT_SRC_ROUTE=
-
-FW_DEFAULT_INPUT_POLICY=REJECT
-FW_DEFAULT_OUTPUT_POLICY=REJECT
-FW_DEFAULT_FORWARD_POLICY=REJECT
-
-FW_DISABLE_IPV4=0
-FW_DISABLE_IPV6=0
-
-
-fw_load_defaults() {
- fw_config_get_section "$1" defaults { \
- string input $FW_DEFAULT_INPUT_POLICY \
- string output $FW_DEFAULT_OUTPUT_POLICY \
- string forward $FW_DEFAULT_FORWARD_POLICY \
- boolean drop_invalid 0 \
- boolean syn_flood 0 \
- boolean synflood_protect 0 \
- string synflood_rate 25 \
- string synflood_burst 50 \
- boolean tcp_syncookies 1 \
- boolean tcp_ecn 0 \
- boolean tcp_westwood 0 \
- boolean tcp_window_scaling 1 \
- boolean accept_redirects 0 \
- boolean accept_source_route 0 \
- boolean custom_chains 1 \
- boolean disable_ipv6 0 \
- } || return
- [ -n "$FW_DEFAULTS_APPLIED" ] && {
- fw_log error "duplicate defaults section detected, skipping"
- return 1
- }
- FW_DEFAULTS_APPLIED=1
-
- FW_DEFAULT_INPUT_POLICY=$defaults_input
- FW_DEFAULT_OUTPUT_POLICY=$defaults_output
- FW_DEFAULT_FORWARD_POLICY=$defaults_forward
-
- FW_ADD_CUSTOM_CHAINS=$defaults_custom_chains
-
- FW_ACCEPT_REDIRECTS=$defaults_accept_redirects
- FW_ACCEPT_SRC_ROUTE=$defaults_accept_source_route
-
- FW_DISABLE_IPV6=$defaults_disable_ipv6
-
- fw_callback pre defaults
-
- # Seems like there are only one sysctl for both IP versions.
- for s in syncookies ecn westwood window_scaling; do
- eval "sysctl -e -w net.ipv4.tcp_${s}=\$defaults_tcp_${s}" >/dev/null
- done
- fw_sysctl_interface all
-
- fw add i f INPUT ACCEPT { -m conntrack --ctstate RELATED,ESTABLISHED }
- fw add i f OUTPUT ACCEPT { -m conntrack --ctstate RELATED,ESTABLISHED }
- fw add i f FORWARD ACCEPT { -m conntrack --ctstate RELATED,ESTABLISHED }
-
- [ $defaults_drop_invalid == 1 ] && {
- fw add i f INPUT DROP { -m conntrack --ctstate INVALID }
- fw add i f OUTPUT DROP { -m conntrack --ctstate INVALID }
- fw add i f FORWARD DROP { -m conntrack --ctstate INVALID }
- FW_NOTRACK_DISABLED=1
- }
-
- fw add i f INPUT ACCEPT { -i lo }
- fw add i f OUTPUT ACCEPT { -o lo }
-
- # Compatibility to old 'syn_flood' parameter
- [ $defaults_syn_flood == 1 ] && \
- defaults_synflood_protect=1
-
- [ "${defaults_synflood_rate%/*}" == "$defaults_synflood_rate" ] && \
- defaults_synflood_rate="$defaults_synflood_rate/second"
-
- [ $defaults_synflood_protect == 1 ] && {
- echo "Loading synflood protection"
- fw_callback pre synflood
- fw add i f syn_flood
- fw add i f syn_flood RETURN { \
- -p tcp --syn \
- -m limit --limit "${defaults_synflood_rate}" --limit-burst "${defaults_synflood_burst}" \
- }
- fw add i f syn_flood DROP
- fw add i f INPUT syn_flood { -p tcp --syn }
- fw_callback post synflood
- }
-
- [ $defaults_custom_chains == 1 ] && {
- echo "Adding custom chains"
- fw add i f input_rule
- fw add i f output_rule
- fw add i f forwarding_rule
- fw add i n prerouting_rule
- fw add i n postrouting_rule
-
- fw add i f INPUT input_rule
- fw add i f OUTPUT output_rule
- fw add i f FORWARD forwarding_rule
- fw add i n PREROUTING prerouting_rule
- fw add i n POSTROUTING postrouting_rule
- }
-
- fw add i f input
- fw add i f output
- fw add i f forward
-
- fw add i f INPUT input
- fw add i f OUTPUT output
- fw add i f FORWARD forward
-
- fw add i f reject
- fw add i f reject REJECT { --reject-with tcp-reset -p tcp }
- fw add i f reject REJECT { --reject-with port-unreach }
-
- fw_set_filter_policy
-
- fw_callback post defaults
-}
-
-
-fw_config_get_zone() {
- [ "${zone_NAME}" != "$1" ] || return
- fw_config_get_section "$1" zone { \
- string name "$1" \
- string network "" \
- string input "$FW_DEFAULT_INPUT_POLICY" \
- string output "$FW_DEFAULT_OUTPUT_POLICY" \
- string forward "$FW_DEFAULT_FORWARD_POLICY" \
- boolean masq 0 \
- string masq_src "" \
- string masq_dest "" \
- boolean conntrack 0 \
- boolean mtu_fix 0 \
- boolean custom_chains "$FW_ADD_CUSTOM_CHAINS" \
- boolean log 0 \
- string log_limit 10 \
- string family "" \
- } || return
- [ -n "$zone_name" ] || zone_name=$zone_NAME
- [ -n "$zone_network" ] || zone_network=$zone_name
-}
-
-fw_load_zone() {
- fw_config_get_zone "$1"
-
- list_contains FW_ZONES $zone_name && {
- fw_log error "zone ${zone_name}: duplicated zone, skipping"
- return 0
- }
- append FW_ZONES $zone_name
-
- fw_callback pre zone
-
- [ $zone_conntrack = 1 -o $zone_masq = 1 ] && \
- append FW_CONNTRACK_ZONES "$zone_name"
-
- local mode
- case "$zone_family" in
- *4)
- mode=4
- append FW_ZONES4 $zone_name
- uci_set_state firewall core ${zone_name}_ipv4 1
- ;;
- *6)
- mode=6
- append FW_ZONES6 $zone_name
- uci_set_state firewall core ${zone_name}_ipv6 1
- ;;
- *)
- mode=i
- append FW_ZONES4 $zone_name
- append FW_ZONES6 $zone_name
- uci_set_state firewall core ${zone_name}_ipv4 1
- uci_set_state firewall core ${zone_name}_ipv6 1
- ;;
- esac
-
- local chain=zone_${zone_name}
-
- fw add $mode f ${chain}_ACCEPT
- fw add $mode f ${chain}_DROP
- fw add $mode f ${chain}_REJECT
-
- # TODO: Rename to ${chain}_input
- fw add $mode f ${chain}
- fw add $mode f ${chain} ${chain}_${zone_input} $
-
- fw add $mode f ${chain}_forward
- fw add $mode f ${chain}_forward ${chain}_${zone_forward} $
-
- # TODO: add ${chain}_output
- fw add $mode f output ${chain}_${zone_output} $
-
- # TODO: Rename to ${chain}_MASQUERADE
- fw add $mode n ${chain}_nat
- fw add $mode n ${chain}_prerouting
-
- fw add $mode r ${chain}_notrack
-
- [ $zone_mtu_fix == 1 ] && {
- fw add $mode m ${chain}_MSSFIX
- fw add $mode m FORWARD ${chain}_MSSFIX ^
- uci_set_state firewall core ${zone_name}_tcpmss 1
- }
-
- [ $zone_custom_chains == 1 ] && {
- [ $FW_ADD_CUSTOM_CHAINS == 1 ] || \
- fw_die "zone ${zone_name}: custom_chains globally disabled"
-
- fw add $mode f input_${zone_name}
- fw add $mode f ${chain} input_${zone_name} ^
-
- fw add $mode f forwarding_${zone_name}
- fw add $mode f ${chain}_forward forwarding_${zone_name} ^
-
- fw add $mode n prerouting_${zone_name}
- fw add $mode n ${chain}_prerouting prerouting_${zone_name} ^
- }
-
- [ "$zone_log" == 1 ] && {
- [ "${zone_log_limit%/*}" == "$zone_log_limit" ] && \
- zone_log_limit="$zone_log_limit/minute"
-
- local t
- for t in REJECT DROP; do
- fw add $mode f ${chain}_${t} LOG ^ \
- { -m limit --limit $zone_log_limit --log-prefix "$t($zone_name): " }
- done
-
- [ $zone_mtu_fix == 1 ] && \
- fw add $mode m ${chain}_MSSFIX LOG ^ \
- { -m limit --limit $zone_log_limit --log-prefix "MSSFIX($zone_name): " }
- }
-
- # NB: if MASQUERADING for IPv6 becomes available we'll need a family check here
- if [ "$zone_masq" == 1 ]; then
- local msrc mdst
- for msrc in ${zone_masq_src:-0.0.0.0/0}; do
- case "$msrc" in
- *.*) fw_get_negation msrc '-s' "$msrc" ;;
- *) fw_get_subnet4 msrc '-s' "$msrc" || break ;;
- esac
-
- for mdst in ${zone_masq_dest:-0.0.0.0/0}; do
- case "$mdst" in
- *.*) fw_get_negation mdst '-d' "$mdst" ;;
- *) fw_get_subnet4 mdst '-d' "$mdst" || break ;;
- esac
-
- fw add $mode n ${chain}_nat MASQUERADE $ { $msrc $mdst }
- done
- done
- fi
-
- fw_callback post zone
-}
-
-fw_load_notrack_zone() {
- fw_config_get_zone "$1"
- list_contains FW_CONNTRACK_ZONES "${zone_name}" && return
-
- fw_callback pre notrack
-
- fw add i r zone_${zone_name}_notrack NOTRACK $
-
- fw_callback post notrack
-}
-
-
-fw_load_include() {
- local name="$1"
-
- local path
- config_get path ${name} path
-
- [ -e $path ] && (
- config() {
- fw_log error "You cannot use UCI in firewall includes!" >&2
- exit 1
- }
- . $path
- )
-}
-
-
-fw_clear() {
- local policy=$1
-
- fw_set_filter_policy $policy
-
- local tab
- for tab in f n r; do
- fw del i $tab
- done
-}
-
-fw_set_filter_policy() {
- local policy=$1
-
- local chn tgt
- for chn in INPUT OUTPUT FORWARD; do
- eval "tgt=\${policy:-\${FW_DEFAULT_${chn}_POLICY}}"
- [ $tgt == "REJECT" ] && tgt=reject
- [ $tgt == "ACCEPT" -o $tgt == "DROP" ] || {
- fw add i f $chn $tgt $
- tgt=DROP
- }
- fw policy i f $chn $tgt
- done
-}
-
-
-fw_callback() {
- local pp=$1
- local hk=$2
-
- local libs lib
- eval "libs=\$FW_CB_${pp}_${hk}"
- [ -n "$libs" ] || return
- for lib in $libs; do
- ${lib}_${pp}_${hk}_cb
- done
-}
projects / openwrt / svn-archive / archive.git / blobdiff