1 # Copyright (C) 2009-2010 OpenWrt.org
7 local val=" $(uci_get_state firewall core $var) "
8 val="${val// $item / }"
11 uci_set_state firewall core $var "${val:+$val }$item"
18 local val=" $(uci_get_state firewall core $var) "
19 val="${val// $item / }"
22 uci_set_state firewall core $var "$val"
25 fw_configure_interface() {
31 [ "$action" == "add" ] && {
32 local status=$(uci_get_state network "$iface" up 0)
33 [ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0
37 ifname=$(uci_get_state network "$iface" ifname)
38 ifname="${ifname%%:*}"
39 [ -z "$ifname" ] && return 0
42 [ "$ifname" == "lo" ] && return 0
44 fw_callback pre interface
49 local chain=zone_${zone}
54 fw_get_family_mode mode x $zone i
56 case "$mode/$subnet" in
57 # Zone supports v6 only or dual, need v6
59 inet="-s $subnet -d ::/0"
60 onet="-s ::/0 -d $subnet"
64 # Zone supports v4 only or dual, need v4
66 inet="-s $subnet -d 0.0.0.0/0"
67 onet="-s 0.0.0.0/0 -d $subnet"
71 # Need v6 while zone is v4
72 */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
74 # Need v4 while zone is v6
75 */*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;;
78 *) mode="${mode#G}" ;;
81 lock /var/run/firewall-interface.lock
83 fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -o "$ifname" $onet }
84 fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -i "$ifname" $inet }
85 fw $action $mode f ${chain}_DROP DROP $ { -o "$ifname" $onet }
86 fw $action $mode f ${chain}_DROP DROP $ { -i "$ifname" $inet }
87 fw $action $mode f ${chain}_REJECT reject $ { -o "$ifname" $onet }
88 fw $action $mode f ${chain}_REJECT reject $ { -i "$ifname" $inet }
90 fw $action $mode f ${chain}_MSSFIX TCPMSS $ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu $onet }
92 fw $action $mode f input ${chain} $ { -i "$ifname" $inet }
93 fw $action $mode f forward ${chain}_forward $ { -i "$ifname" $inet }
94 fw $action $mode n PREROUTING ${chain}_prerouting $ { -i "$ifname" $inet }
95 fw $action $mode r PREROUTING ${chain}_notrack $ { -i "$ifname" $inet }
96 fw $action $mode n POSTROUTING ${chain}_nat $ { -o "$ifname" $onet }
98 lock -u /var/run/firewall-interface.lock
101 local old_zones old_ifname old_subnets
102 config_get old_zones core "${iface}_zone"
103 [ -n "$old_zones" ] && {
104 config_get old_ifname core "${iface}_ifname"
105 config_get old_subnets core "${iface}_subnets"
108 for z in $old_zones; do
110 for n in ${old_subnets:-""}; do
111 fw_log info "removing $iface ($old_ifname${n:+ alias $n}) from zone $z"
112 fw__do_rules del $z $old_ifname $n
115 [ -n "$old_subnets" ] || {
116 fw__uci_state_del "${z}_networks" "$iface"
117 env -i ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
122 config_get old_aliases core "${iface}_aliases"
125 for a in $old_aliases; do
126 fw_configure_interface "$a" del "$old_ifname"
129 uci_revert_state firewall core "${iface}_zone"
130 uci_revert_state firewall core "${iface}_ifname"
131 uci_revert_state firewall core "${iface}_subnets"
132 uci_revert_state firewall core "${iface}_aliases"
135 [ "$action" == del ] && return
137 [ -z "$aliasnet" ] && {
139 config_get aliases "$iface" aliases
142 for a in $aliases; do
143 local ipaddr netmask ip6addr
144 config_get ipaddr "$a" ipaddr
145 config_get netmask "$a" netmask
146 config_get ip6addr "$a" ip6addr
148 [ -n "$ipaddr" ] && fw_configure_interface "$a" add "" "$ipaddr${netmask:+/$netmask}"
149 [ -n "$ip6addr" ] && fw_configure_interface "$a" add "" "$ip6addr"
152 fw_sysctl_interface $ifname
153 fw_callback post interface
155 uci_set_state firewall core "${iface}_aliases" "$aliases"
158 config_get subnets core "${iface}_subnets"
159 append subnets "$aliasnet"
161 config_set core "${iface}_subnets" "$subnets"
162 uci_set_state firewall core "${iface}_subnets" "$subnets"
167 fw_config_get_zone "$1"
168 list_contains zone_network "$iface" || return
170 fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
171 fw__do_rules add ${zone_name} "$ifname" "$aliasnet"
172 append new_zones $zone_name
174 [ -n "$aliasnet" ] || {
175 fw__uci_state_add "${zone_name}_networks" "${zone_network}"
176 env -i ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
179 config_foreach load_zone zone
181 uci_set_state firewall core "${iface}_zone" "$new_zones"
182 uci_set_state firewall core "${iface}_ifname" "$ifname"
185 fw_sysctl_interface() {
188 sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
189 sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
190 sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
191 sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
192 } >/dev/null 2>/dev/null