1 # Copyright (C) 2009-2010 OpenWrt.org
3 fw_configure_interface() {
9 [ "$action" == "add" ] && {
10 local status=$(uci_get_state network "$iface" up 0)
11 [ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0
15 ifname=$(uci_get_state network "$iface" ifname "$iface")
16 ifname="${ifname%%:*}"
19 [ "$ifname" == "lo" ] && return 0
21 fw_callback pre interface
26 local chain=zone_${zone}
31 local mode=$(fw_get_family_mode x $zone i)
33 case "$mode/$subnet" in
34 # Zone supports v6 only or dual, need v6
36 inet="{ -s $subnet -d ::/0 }"
37 onet="{ -s ::/0 -d $subnet }"
41 # Zone supports v4 only or dual, need v4
43 inet="{ -s $subnet -d 0.0.0.0/0 }"
44 onet="{ -s 0.0.0.0/0 -d $subnet }"
48 # Need v6 while zone is v4
49 */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
51 # Need v4 while zone is v6
52 */*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;;
55 fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $onet { -o "$ifname" }
56 fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $inet { -i "$ifname" }
57 fw $action $mode f ${chain}_DROP DROP ^ $onet { -o "$ifname" }
58 fw $action $mode f ${chain}_DROP DROP ^ $inet { -i "$ifname" }
59 fw $action $mode f ${chain}_REJECT reject ^ $onet { -o "$ifname" }
60 fw $action $mode f ${chain}_REJECT reject ^ $inet { -i "$ifname" }
62 fw $action $mode n ${chain}_nat MASQUERADE ^ $onet { -o "$ifname" }
63 fw $action $mode f ${chain}_MSSFIX TCPMSS ^ $onet { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu }
65 fw $action $mode f input ${chain} $ $inet { -i "$ifname" }
66 fw $action $mode f forward ${chain}_forward $ $inet { -i "$ifname" }
67 fw $action $mode n PREROUTING ${chain}_prerouting ^ $inet { -i "$ifname" }
68 fw $action $mode r PREROUTING ${chain}_notrack ^ $inet { -i "$ifname" }
71 local old_zones old_ifname old_subnets
72 config_get old_zones core "${iface}_zone"
73 [ -n "$old_zones" ] && {
74 config_get old_ifname core "${iface}_ifname"
75 config_get old_subnets core "${iface}_subnets"
78 for z in $old_zones; do
80 for n in ${old_subnets:-""}; do
81 fw_log info "removing $iface ($old_ifname${n:+ alias $n}) from zone $z"
82 fw__do_rules del $z $old_ifname $n
85 [ -n "$old_subnets" ] || ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
89 config_get old_aliases core "${iface}_aliases"
92 for a in $old_aliases; do
93 fw_configure_interface "$a" del "$old_ifname"
96 uci_revert_state firewall core "${iface}_zone"
97 uci_revert_state firewall core "${iface}_ifname"
98 uci_revert_state firewall core "${iface}_subnets"
99 uci_revert_state firewall core "${iface}_aliases"
102 [ "$action" == del ] && return
106 fw_config_get_zone "$1"
107 list_contains zone_network "$iface" || return
109 fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
110 fw__do_rules add ${zone_name} "$ifname" $aliasnet
111 append new_zones $zone_name
113 [ -n "$aliasnet" ] || ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
115 config_foreach load_zone zone
117 [ -z "$aliasnet" ] && {
119 config_get aliases "$iface" aliases
122 for a in $aliases; do
123 local ipaddr netmask ip6addr
124 config_get ipaddr "$a" ipaddr
125 config_get netmask "$a" netmask
126 config_get ip6addr "$a" ip6addr
128 [ -n "$ipaddr" ] && fw_configure_interface "$a" add "" "$ipaddr${netmask:+/$netmask}"
129 [ -n "$ip6addr" ] && fw_configure_interface "$a" add "" "$ip6addr"
132 fw_sysctl_interface $ifname
133 fw_callback post interface
135 uci_set_state firewall core "${iface}_aliases" "$aliases"
138 config_get subnets core "${iface}_subnets"
139 append subnets "$aliasnet"
141 config_set core "${iface}_subnets" "$subnets"
142 uci_set_state firewall core "${iface}_subnets" "$subnets"
145 uci_set_state firewall core "${iface}_zone" "$new_zones"
146 uci_set_state firewall core "${iface}_ifname" "$ifname"
149 fw_sysctl_interface() {
152 sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
153 sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
154 sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
155 sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
156 } >/dev/null 2>/dev/null