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222 lines
7.0 KiB
Bash
Executable File
222 lines
7.0 KiB
Bash
Executable File
#!/bin/sh
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# map.sh - IPv4-in-IPv6 tunnel backend
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#
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# Author: Steven Barth <cyrus@openwrt.org>
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# Copyright (c) 2014 cisco Systems, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2
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# as published by the Free Software Foundation
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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[ -n "$INCLUDE_ONLY" ] || {
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. /lib/functions.sh
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. /lib/functions/network.sh
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. ../netifd-proto.sh
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init_proto "$@"
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}
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proto_map_setup() {
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local cfg="$1"
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local iface="$2"
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local link="map-$cfg"
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# uncomment for legacy MAP0 mode
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#export LEGACY=1
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local type mtu ttl tunlink zone
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local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
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json_get_vars type mtu ttl tunlink zone
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json_get_vars rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
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[ -z "$zone" ] && zone="wan"
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[ -z "$type" ] && type="map-e"
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[ -z "$ip4prefixlen" ] && ip4prefixlen=32
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( proto_add_host_dependency "$cfg" "::" "$tunlink" )
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# fixme: handle RA/DHCPv6 address race for LW
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[ "$type" = lw4o6 ] && sleep 5
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if [ -z "$rule" ]; then
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rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen"
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[ -n "$psid" ] && rule="$rule,psid=$psid"
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[ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen"
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[ -n "$offset" ] && rule="$rule,offset=$offset"
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[ -n "$ealen" ] && rule="$rule,ealen=$ealen"
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if [ "$type" = "map-t" ]; then
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rule="$rule,dmr=$peeraddr"
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else
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rule="$rule,br=$peeraddr"
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fi
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fi
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echo "rule=$rule" > /tmp/map-$cfg.rules
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RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
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if [ "$?" != 0 ]; then
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proto_notify_error "$cfg" "INVALID_MAP_RULE"
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proto_block_restart "$cfg"
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return
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fi
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echo "$RULE_DATA" >> /tmp/map-$cfg.rules
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eval $RULE_DATA
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if [ -z "$RULE_BMR" ]; then
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proto_notify_error "$cfg" "NO_MATCHING_PD"
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proto_block_restart "$cfg"
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return
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fi
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k=$RULE_BMR
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if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
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proto_init_update "$link" 1
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proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
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proto_add_tunnel
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json_add_string mode ipip6
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json_add_int mtu "${mtu:-1280}"
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json_add_int ttl "${ttl:-64}"
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json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
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json_add_string remote $(eval "echo \$RULE_${k}_BR")
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json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
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if [ "$type" = "map-e" ]; then
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json_add_array "fmrs"
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for i in $(seq $RULE_COUNT); do
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[ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
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fmr="$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
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fmr="$fmr,$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
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fmr="$fmr,$(eval "echo \$RULE_${i}_EALEN"),$(eval "echo \$RULE_${i}_OFFSET")"
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json_add_string "" "$fmr"
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done
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json_close_array
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fi
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proto_close_tunnel
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elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
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proto_init_update "$link" 1
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local style="MAP"
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[ "$LEGACY" = 1 ] && style="MAP0"
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echo add $link > /proc/net/nat46/control
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local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")"
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cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")"
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cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")"
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cfgstr="$cfgstr remote.v4 0.0.0.0/0 remote.v6 $(eval "echo \$RULE_${k}_DMR") remote.style RFC6052 remote.ea-len 0 remote.psid-offset 0"
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echo config $link $cfgstr > /proc/net/nat46/control
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for i in $(seq $RULE_COUNT); do
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[ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
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local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
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cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
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cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")"
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echo insert $link $cfgstr > /proc/net/nat46/control
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done
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else
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proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
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proto_block_restart "$cfg"
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fi
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proto_add_ipv4_route "0.0.0.0" 0
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proto_add_data
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[ "$zone" != "-" ] && json_add_string zone "$zone"
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json_add_array firewall
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if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then
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json_add_object ""
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json_add_string type nat
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json_add_string target SNAT
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json_add_string family inet
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json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
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json_close_object
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else
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for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
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for proto in icmp tcp udp; do
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json_add_object ""
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json_add_string type nat
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json_add_string target SNAT
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json_add_string family inet
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json_add_string proto "$proto"
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json_add_boolean connlimit_ports 1
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json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
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json_add_string snat_port "$portset"
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json_close_object
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done
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done
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fi
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if [ "$type" = "map-t" ]; then
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json_add_object ""
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json_add_string type rule
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json_add_string family inet6
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json_add_string proto all
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json_add_string direction in
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json_add_string dest "$zone"
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json_add_string src "$zone"
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json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
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json_add_string target ACCEPT
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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 family inet6
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json_add_string proto all
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json_add_string direction out
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json_add_string dest "$zone"
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json_add_string src "$zone"
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json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
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json_add_string target ACCEPT
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json_close_object
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proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128
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fi
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json_close_array
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proto_close_data
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proto_send_update "$cfg"
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if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
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json_init
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json_add_string name "${cfg}_"
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json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
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json_add_string proto "static"
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json_add_array ip6addr
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json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
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json_close_array
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json_close_object
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ubus call network add_dynamic "$(json_dump)"
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fi
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}
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proto_map_teardown() {
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local cfg="$1"
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ifdown "${cfg}_"
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rm -f /tmp/map-$cfg.rules
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}
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proto_map_init_config() {
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no_device=1
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available=1
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proto_config_add_string "rule"
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proto_config_add_string "ipaddr"
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proto_config_add_int "ip4prefixlen"
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proto_config_add_string "ip6prefix"
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proto_config_add_int "ip6prefixlen"
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proto_config_add_string "peeraddr"
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proto_config_add_int "psidlen"
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proto_config_add_int "psid"
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proto_config_add_int "offset"
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proto_config_add_string "tunlink"
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proto_config_add_int "mtu"
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proto_config_add_int "ttl"
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proto_config_add_string "zone"
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}
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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol map
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}
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