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#!/bin/sh

. /lib/functions.sh
. ../netifd-proto.sh
init_proto "$@"

proto_dhcpv6_init_config() {
        renew_handler=1

        proto_config_add_string 'reqaddress:or("try","force","none")'
        proto_config_add_string 'reqprefix:or("auto","no",range(0, 64))'
        proto_config_add_string clientid
        proto_config_add_string 'reqopts:list(uinteger)'
        proto_config_add_string 'defaultreqopts:bool'
        proto_config_add_string 'noslaaconly:bool'
        proto_config_add_string 'forceprefix:bool'
        proto_config_add_string 'extendprefix:bool'
        proto_config_add_string 'norelease:bool'
        proto_config_add_string 'noserverunicast:bool'
        proto_config_add_string 'noclientfqdn:bool'
        proto_config_add_string 'noacceptreconfig:bool'
        proto_config_add_array 'ip6prefix:list(ip6addr)'
        proto_config_add_string iface_dslite
        proto_config_add_string zone_dslite
        proto_config_add_string encaplimit_dslite
        proto_config_add_string iface_map
        proto_config_add_string zone_map
        proto_config_add_string encaplimit_map
        proto_config_add_string iface_464xlat
        proto_config_add_string zone_464xlat
        proto_config_add_string zone
        proto_config_add_string 'ifaceid:ip6addr'
        proto_config_add_string "userclass"
        proto_config_add_string "vendorclass"
        proto_config_add_array "sendopts:list(string)"
        proto_config_add_boolean delegate
        proto_config_add_int "soltimeout"
        proto_config_add_boolean fakeroutes
        proto_config_add_boolean sourcefilter
        proto_config_add_boolean keep_ra_dnslifetime
        proto_config_add_int "ra_holdoff"
}

proto_dhcpv6_add_prefix() {
        append "$3" "$1"
}

proto_dhcpv6_add_sendopts() {
        [ -n "$1" ] && append "$3" "-x$1"
}

proto_dhcpv6_setup() {
        local config="$1"
        local iface="$2"

        local reqaddress reqprefix clientid reqopts defaultreqopts noslaaconly forceprefix extendprefix norelease noserverunicast noclientfqdn noacceptreconfig ip6prefix ip6prefixes iface_dslite iface_map iface_464xlat ifaceid userclass vendorclass sendopts delegate zone_dslite zone_map zone_464xlat zone encaplimit_dslite encaplimit_map soltimeout fakeroutes sourcefilter keep_ra_dnslifetime ra_holdoff
        json_get_vars reqaddress reqprefix clientid reqopts defaultreqopts noslaaconly forceprefix extendprefix norelease noserverunicast noclientfqdn noacceptreconfig iface_dslite iface_map iface_464xlat ifaceid userclass vendorclass delegate zone_dslite zone_map zone_464xlat zone encaplimit_dslite encaplimit_map soltimeout fakeroutes sourcefilter keep_ra_dnslifetime ra_holdoff
        json_for_each_item proto_dhcpv6_add_prefix ip6prefix ip6prefixes

        # Configure
        local opts=""
        [ -n "$reqaddress" ] && append opts "-N$reqaddress"

        [ -z "$reqprefix" -o "$reqprefix" = "auto" ] && reqprefix=0
        [ "$reqprefix" != "no" ] && append opts "-P$reqprefix"

        [ -n "$clientid" ] && append opts "-c$clientid"

        [ "$defaultreqopts" = "0" ] && append opts "-R"

        [ "$noslaaconly" = "1" ] && append opts "-S"

        [ "$forceprefix" = "1" ] && append opts "-F"

        [ "$norelease" = "1" ] && append opts "-k"

        [ "$noserverunicast" = "1" ] && append opts "-U"

        [ "$noclientfqdn" = "1" ] && append opts "-f"

        [ "$noacceptreconfig" = "1" ] && append opts "-a"

        [ -n "$ifaceid" ] && append opts "-i$ifaceid"

        [ -n "$vendorclass" ] && append opts "-V$vendorclass"

        [ -n "$userclass" ] && append opts "-u$userclass"

        [ "$keep_ra_dnslifetime" = "1" ] && append opts "-L"

        [ -n "$ra_holdoff" ] && append opts "-m$ra_holdoff"

        local opt
        for opt in $reqopts; do
                append opts "-r$opt"
        done

        json_for_each_item proto_dhcpv6_add_sendopts sendopts opts

        append opts "-t${soltimeout:-120}"

        [ -n "$ip6prefixes" ] && proto_export "USERPREFIX=$ip6prefixes"
        [ -n "$iface_dslite" ] && proto_export "IFACE_DSLITE=$iface_dslite"
        [ -n "$iface_map" ] && proto_export "IFACE_MAP=$iface_map"
        [ -n "$iface_464xlat" ] && proto_export "IFACE_464XLAT=$iface_464xlat"
        [ "$delegate" = "0" ] && proto_export "IFACE_DSLITE_DELEGATE=0"
        [ "$delegate" = "0" ] && proto_export "IFACE_MAP_DELEGATE=0"
        [ -n "$zone_dslite" ] && proto_export "ZONE_DSLITE=$zone_dslite"
        [ -n "$zone_map" ] && proto_export "ZONE_MAP=$zone_map"
        [ -n "$zone_464xlat" ] && proto_export "ZONE_464XLAT=$zone_464xlat"
        [ -n "$zone" ] && proto_export "ZONE=$zone"
        [ -n "$encaplimit_dslite" ] && proto_export "ENCAPLIMIT_DSLITE=$encaplimit_dslite"
        [ -n "$encaplimit_map" ] && proto_export "ENCAPLIMIT_MAP=$encaplimit_map"
        [ "$fakeroutes" != "0" ] && proto_export "FAKE_ROUTES=1"
        [ "$sourcefilter" = "0" ] && proto_export "NOSOURCEFILTER=1"
        [ "$extendprefix" = "1" ] && proto_export "EXTENDPREFIX=1"

        proto_export "INTERFACE=$config"
        proto_run_command "$config" odhcp6c \
                -s /lib/netifd/dhcpv6.script \
                $opts $iface
}

proto_dhcpv6_renew() {
        local interface="$1"
        # SIGUSR1 forces odhcp6c to renew its lease
        local sigusr1="$(kill -l SIGUSR1)"
        [ -n "$sigusr1" ] && proto_kill_command "$interface" $sigusr1
}

proto_dhcpv6_teardown() {
        local interface="$1"
        proto_kill_command "$interface"
}

add_protocol dhcpv6