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 "$aliasnet" ] || return 0
14 [ -n "$ifname" ] || ifname=$(uci_get_state network "$iface" ifname "$iface")
15 [ "$ifname" == "lo" ] && return 0
17 fw_callback pre interface
22 local chain=zone_${zone}
27 local mode=$(fw_get_family_mode x $zone i)
29 case "$mode/$subnet" in
30 # Zone supports v6 only or dual, need v6
32 inet="{ -s $subnet -d ::/0 }"
33 onet="{ -s ::/0 -d $subnet }"
37 # Zone supports v4 only or dual, need v4
39 inet="{ -s $subnet -d 0.0.0.0/0 }"
40 onet="{ -s 0.0.0.0/0 -d $subnet }"
44 # Need v6 while zone is v4
45 */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
47 # Need v4 while zone is v6
48 */*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;;
51 fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $onet { -o "$ifname" }
52 fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $inet { -i "$ifname" }
53 fw $action $mode f ${chain}_DROP DROP ^ $onet { -o "$ifname" }
54 fw $action $mode f ${chain}_DROP DROP ^ $inet { -i "$ifname" }
55 fw $action $mode f ${chain}_REJECT reject ^ $onet { -o "$ifname" }
56 fw $action $mode f ${chain}_REJECT reject ^ $inet { -i "$ifname" }
58 fw $action $mode n ${chain}_nat MASQUERADE ^ $onet { -o "$ifname" }
59 fw $action $mode f ${chain}_MSSFIX TCPMSS ^ $onet { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu }
61 fw $action $mode f input ${chain} $ $inet { -i "$ifname" }
62 fw $action $mode f forward ${chain}_forward $ $inet { -i "$ifname" }
63 fw $action $mode n PREROUTING ${chain}_prerouting ^ $inet { -i "$ifname" }
64 fw $action $mode r PREROUTING ${chain}_notrack ^ $inet { -i "$ifname" }
67 local old_zones old_ifname old_subnet
68 config_get old_zones core "${iface}_zone"
69 [ -n "$old_zones" ] && {
70 config_get old_ifname core "${iface}_ifname"
71 config_get old_subnet core "${iface}_subnet"
74 for z in $old_zones; do
75 fw_log info "removing $iface ($old_ifname${old_subnet:+ alias $old_subnet}) from zone $z"
76 fw__do_rules del $z $old_ifname $old_subnet
78 [ -n "$old_subnet" ] || ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
82 config_get old_aliases core "${iface}_aliases"
85 for a in $old_aliases; do
86 fw_configure_interface "$a" del "$old_ifname"
89 uci_revert_state firewall core "${iface}_zone"
90 uci_revert_state firewall core "${iface}_ifname"
91 uci_revert_state firewall core "${iface}_subnet"
92 uci_revert_state firewall core "${iface}_aliases"
95 [ "$action" == del ] && return
99 fw_config_get_zone "$1"
100 list_contains zone_network "$iface" || return
102 fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
103 fw__do_rules add ${zone_name} "$ifname" $aliasnet
104 append new_zones $zone_name
106 [ -n "$aliasnet" ] || ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
108 config_foreach load_zone zone
110 [ -z "$aliasnet" ] && {
112 config_get aliases "$iface" aliases
115 for a in $aliases; do
116 local ipaddr netmask ip6addr
117 config_get ipaddr "$a" ipaddr
118 config_get netmask "$a" netmask
119 config_get ip6addr "$a" ip6addr
121 [ -n "$ipaddr" ] && fw_configure_interface "$a" add "$ifname" "$ipaddr${netmask:+/$netmask}"
122 [ -n "$ip6addr" ] && fw_configure_interface "$a" add "$ifname" "$ip6addr"
125 fw_sysctl_interface $ifname
126 fw_callback post interface
128 uci_set_state firewall core "${iface}_aliases" "$aliases"
131 uci_set_state firewall core "${iface}_zone" "$new_zones"
132 uci_set_state firewall core "${iface}_ifname" "$ifname"
133 uci_set_state firewall core "${iface}_subnet" "$aliasnet"
136 fw_sysctl_interface() {
139 sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
140 sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
141 sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
142 sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
143 } >/dev/null 2>/dev/null