1 # Copyright (C) 2009-2010 OpenWrt.org
7 local val=" $(uci_get_state firewall core $var) "
8 val="${val// $item / }"
11 uci_revert_state firewall core $var
12 uci_set_state firewall core $var "${val:+$val }$item"
19 local val=" $(uci_get_state firewall core $var) "
20 val="${val// $item / }"
23 uci_revert_state firewall core $var
24 uci_set_state firewall core $var "$val"
27 fw_configure_interface() {
33 [ "$action" == "add" ] && {
34 local status=$(uci_get_state network "$iface" up 0)
35 [ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0
39 ifname=$(uci_get_state network "$iface" ifname)
40 ifname="${ifname%%:*}"
41 [ -z "$ifname" ] && return 0
44 [ "$ifname" == "lo" ] && return 0
46 fw_callback pre interface
51 local chain=zone_${zone}
56 fw_get_family_mode mode x $zone i
58 case "$mode/$subnet" in
59 # Zone supports v6 only or dual, need v6
61 inet="-s $subnet -d ::/0"
62 onet="-s ::/0 -d $subnet"
66 # Zone supports v4 only or dual, need v4
68 inet="-s $subnet -d 0.0.0.0/0"
69 onet="-s 0.0.0.0/0 -d $subnet"
73 # Need v6 while zone is v4
74 */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
76 # Need v4 while zone is v6
77 */*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;;
80 *) mode="${mode#G}" ;;
83 lock /var/run/firewall-interface.lock
85 fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -o "$ifname" $onet }
86 fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -i "$ifname" $inet }
87 fw $action $mode f ${chain}_DROP DROP $ { -o "$ifname" $onet }
88 fw $action $mode f ${chain}_DROP DROP $ { -i "$ifname" $inet }
89 fw $action $mode f ${chain}_REJECT reject $ { -o "$ifname" $onet }
90 fw $action $mode f ${chain}_REJECT reject $ { -i "$ifname" $inet }
92 fw $action $mode f ${chain}_MSSFIX TCPMSS $ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu $onet }
94 fw $action $mode f input ${chain} $ { -i "$ifname" $inet }
95 fw $action $mode f forward ${chain}_forward $ { -i "$ifname" $inet }
96 fw $action $mode n PREROUTING ${chain}_prerouting $ { -i "$ifname" $inet }
97 fw $action $mode r PREROUTING ${chain}_notrack $ { -i "$ifname" $inet }
98 fw $action $mode n POSTROUTING ${chain}_nat $ { -o "$ifname" $onet }
100 lock -u /var/run/firewall-interface.lock
103 local old_zones old_ifname old_subnets
104 config_get old_zones core "${iface}_zone"
105 [ -n "$old_zones" ] && {
106 config_get old_ifname core "${iface}_ifname"
107 config_get old_subnets core "${iface}_subnets"
110 for z in $old_zones; do
112 for n in ${old_subnets:-""}; do
113 fw_log info "removing $iface ($old_ifname${n:+ alias $n}) from zone $z"
114 fw__do_rules del $z $old_ifname $n
117 [ -n "$old_subnets" ] || {
118 fw__uci_state_del "${z}_networks" "$iface"
119 env -i ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
124 config_get old_aliases core "${iface}_aliases"
127 for a in $old_aliases; do
128 fw_configure_interface "$a" del "$old_ifname"
131 uci_revert_state firewall core "${iface}_zone"
132 uci_revert_state firewall core "${iface}_ifname"
133 uci_revert_state firewall core "${iface}_subnets"
134 uci_revert_state firewall core "${iface}_aliases"
137 [ "$action" == del ] && return
139 [ -z "$aliasnet" ] && {
141 config_get aliases "$iface" aliases
144 for a in $aliases; do
145 local ipaddr netmask ip6addr
146 config_get ipaddr "$a" ipaddr
147 config_get netmask "$a" netmask
148 config_get ip6addr "$a" ip6addr
150 [ -n "$ipaddr" ] && fw_configure_interface "$a" add "" "$ipaddr${netmask:+/$netmask}"
151 [ -n "$ip6addr" ] && fw_configure_interface "$a" add "" "$ip6addr"
154 fw_sysctl_interface $ifname
155 fw_callback post interface
157 uci_set_state firewall core "${iface}_aliases" "$aliases"
160 config_get subnets core "${iface}_subnets"
161 append subnets "$aliasnet"
163 config_set core "${iface}_subnets" "$subnets"
164 uci_set_state firewall core "${iface}_subnets" "$subnets"
169 fw_config_get_zone "$1"
170 list_contains zone_network "$iface" || return
172 fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
173 fw__do_rules add ${zone_name} "$ifname" "$aliasnet"
174 append new_zones $zone_name
176 [ -n "$aliasnet" ] || {
177 fw__uci_state_add "${zone_name}_networks" "${zone_network}"
178 env -i ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
181 config_foreach load_zone zone
183 uci_set_state firewall core "${iface}_zone" "$new_zones"
184 uci_set_state firewall core "${iface}_ifname" "$ifname"
187 fw_sysctl_interface() {
190 sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
191 sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
192 sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
193 sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
194 } >/dev/null 2>/dev/null