#!/bin/sh
#----------------------------------------------------------------------------
# /etc/rc.d/rc305.ipv6-eth - ipv6 configuration ethernet cards   __FLI4LVER__
#
#
# Creation:         23.02.2005  ow
# Last Update:  $Id$
#----------------------------------------------------------------------------

write_etc_hosts_header()
{
    # ------------------------------------------#
    log_info "  setting up /etc/hosts (IPv6) ..."
    # ------------------------------------------#
    {
        cat <<EOF
#----------------------------------------------------------------------------
# /etc/hosts (IPv6)
# automatically created by rc305.ipv6-eth
#----------------------------------------------------------------------------
::1 localhost
EOF
    } >> /etc/hosts
}

setup_nets()
{
    # ---------------------------------------#
    log_info "  setting up IPv6 networks..."
    # ---------------------------------------#

    # needed for dynamically created interfaces, e.g. ppp0, which need at least
    # IPv6 link-local addresses in order to make IPv6 over PPP work
    echo 0 > /proc/sys/net/ipv6/conf/default/disable_ipv6

    # loopback device needs an IPv6 address, too
    echo 0 > /proc/sys/net/ipv6/conf/lo/disable_ipv6

    net_config_dir="/var/run/ipv6.nets"
    mkdir -p "$net_config_dir"

    for idx in $(seq 1 $IPV6_NET_N)
    do
        eval net='$IPV6_NET_'$idx
        eval dev='$IPV6_NET_'$idx'_DEV'
        eval adv='$IPV6_NET_'$idx'_ADVERTISE'
        eval advvalidlft='$IPV6_NET_'$idx'_ADVERTISE_VALID_LIFETIME'
        eval advpreflft='$IPV6_NET_'$idx'_ADVERTISE_PREF_LIFETIME'
        eval adv_dns='$IPV6_NET_'$idx'_ADVERTISE_DNS'
        eval canonical='$IPV6_NET_'$idx'_NAME'

        if ! translate_net_if $dev dev 1
        then
            log_error "    IPV6_NET_$idx: not configured as device $dev could not be mapped"
            continue
        fi

        echo 0 > /proc/sys/net/ipv6/conf/$dev/disable_ipv6

        # assign defaults if necessary
        : ${adv:='no'}
        : ${adv_dns='no'}

        local resolved_net=$(circuit_resolve_address "$net" ipv6)
        if [ -n "$resolved_net" ]
        then
            net="$resolved_net"
        fi

        local circuit=
        case $net in
        {*}*)
            local circuit=$(echo "$net" | sed -n 's/^{\([^}]*\)}.*$/\1/p')
            net=$(echo "$net" | sed -n 's/^{[^}]*}+\(.*\)$/\1/p')
            ;;
        esac

        net=$(netcalc canonicalize $net)
        netaddr=$(echo $net | cut -d '/' -f 1)
        netlen=$(echo $net | cut -d '/' -f 2)

        if [ -z "$circuit" ]
        then
            # statically configured networks should have 'forever' lifetimes
            : ${advvalidlft:='forever'}
            : ${advpreflft:='forever'}
        fi

        netfile="$net_config_dir/$idx.conf"
        {
            echo "netaddr=$netaddr"
            echo "netlen=$netlen"
            echo "dev=$dev"
            echo "circuit=$circuit"
            echo "adv=$adv"
            echo "advvalidlft=$advvalidlft"
            echo "advpreflft=$advpreflft"
            echo "adv_dns=$adv_dns"
            echo "canonical=$canonical"
        } > "$netfile"

        if [ -z "$circuit" ]
        then
            ipv6-interface-setup.sh "$netfile"
        fi
        ip link set dev $dev up
    done
}

write_etc_hosts_router_entries()
{
    # ---------------------------------------#
    log_info "  filling /etc/hosts (IPv6) ..."
    # ---------------------------------------#

    # host-entry for the router
    aliases=
    [ 0$HOSTNAME_ALIAS_N -eq 0 ] || for j in $(seq 1 $HOSTNAME_ALIAS_N)
    do
        eval alias='$HOSTNAME_ALIAS_'$j
        aliases="$aliases $alias"
    done

    ipaddr=$HOSTNAME_IP6
    : ${ipaddr:=IPV6_NET_1_IPADDR}
    if ! translate_ip6_net "$ipaddr" HOSTNAME_IP6 ipaddr 1
    then
        cat >/var/run/ipv6.hostname <<EOF
host_net=${ipaddr%_IPADDR}
host_aliases="$aliases"
EOF
    else
        echo "$ipaddr $HOSTNAME.$DOMAIN_NAME $HOSTNAME $aliases" >> /etc/hosts
    fi
}

if [ "$OPT_IPV6" = "yes" ]
then
    begin_script IPV6 "configuring IPv6..."

    write_etc_hosts_header
    setup_nets
    write_etc_hosts_router_entries

    end_script
fi