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c128371124
It is insecure to let this type of packets inside They can e.g. open ports on some other routers with UPnP, etc Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>
155 lines
3.4 KiB
Bash
155 lines
3.4 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2010-2014 OpenWrt.org
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START=99
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USE_PROCD=1
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PROG=/usr/sbin/igmpproxy
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CONFIGFILE=/var/etc/igmpproxy.conf
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igmp_header() {
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local quickleave verbose
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config_get_bool quickleave "$1" quickleave 0
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config_get verbose "$1" verbose 1
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[ $verbose = "0" ] && logopts="-d"
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[ $verbose = "2" ] && logopts="-v"
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[ $verbose = "3" ] && logopts="-v -v"
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mkdir -p /var/etc
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rm -f /var/etc/igmpproxy.conf
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[ $quickleave -gt 0 ] && echo "quickleave" >> /var/etc/igmpproxy.conf
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[ -L /etc/igmpproxy.conf ] || ln -nsf /var/etc/igmpproxy.conf /etc/igmpproxy.conf
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}
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igmp_add_phyint() {
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local network direction altnets device up
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config_get network $1 network
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config_get direction $1 direction
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config_get altnets $1 altnet
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local status="$(ubus -S call "network.interface.$network" status)"
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[ -n "$status" ] || return
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json_load "$status"
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json_get_var device l3_device
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json_get_var up up
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[ -n "$device" -a "$up" = "1" ] || {
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procd_append_param error "$network is not up"
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return;
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}
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append netdevs "$device"
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[[ "$direction" = "upstream" ]] && has_upstream=1
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echo -e "\nphyint $device $direction ratelimit 0 threshold 1" >> /var/etc/igmpproxy.conf
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if [ -n "$altnets" ]; then
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local altnet
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for altnet in $altnets; do
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echo -e "\taltnet $altnet" >> /var/etc/igmpproxy.conf
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done
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fi
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}
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igmp_add_network() {
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local network
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config_get network $1 network
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procd_add_interface_trigger "interface.*" $network /etc/init.d/igmpproxy reload
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}
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igmp_add_firewall_routing() {
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config_get direction $1 direction
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config_get zone $1 zone
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[[ "$direction" = "downstream" && ! -z "$zone" ]] || return 0
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# First drop SSDP packets then accept all other multicast
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json_add_object ""
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json_add_string type rule
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json_add_string src "$upstream"
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json_add_string dest "$zone"
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json_add_string family ipv4
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json_add_string proto udp
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json_add_string dest_ip "239.255.255.250"
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json_add_string target DROP
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json_close_object
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json_add_object ""
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json_add_string type rule
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json_add_string src "$upstream"
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json_add_string dest "$zone"
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json_add_string family ipv4
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json_add_string proto udp
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json_add_string dest_ip "224.0.0.0/4"
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json_add_string target ACCEPT
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json_close_object
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}
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igmp_add_firewall_network() {
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config_get direction $1 direction
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config_get zone $1 zone
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[ ! -z "$zone" ] || return
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json_add_object ""
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json_add_string type rule
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json_add_string src "$zone"
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json_add_string family ipv4
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json_add_string proto igmp
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json_add_string target ACCEPT
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json_close_object
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[[ "$direction" = "upstream" ]] && {
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upstream="$zone"
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config_foreach igmp_add_firewall_routing phyint
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}
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}
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service_triggers() {
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procd_add_reload_trigger "igmpproxy"
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config_foreach igmp_add_network phyint
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}
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start_service() {
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has_upstream=
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netdevs=
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logopts=
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config_load igmpproxy
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config_foreach igmp_header igmpproxy
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config_foreach igmp_add_phyint phyint
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[ -n "$has_upstream" ] || return
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procd_open_instance
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procd_set_param command $PROG '-n'
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[ -n "$logopts" ] && procd_append_param command $logopts
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procd_append_param command $CONFIGFILE
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procd_set_param file $CONFIGFILE
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procd_set_param netdev $netdevs
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procd_set_param respawn
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procd_open_data
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json_add_array firewall
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config_foreach igmp_add_firewall_network phyint
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json_close_array
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procd_close_data
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procd_close_instance
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}
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service_started() {
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procd_set_config_changed firewall
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}
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stop_service() {
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procd_set_config_changed firewall
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}
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