#!/bin/sh
#----------------------------------------------------------------------------
# /etc/rc.d/circuits.net - net circuits
#
# Last Update:  $Id$
#----------------------------------------------------------------------------

# $1 = circuit information file
# $2 = variable receiving an error message (if any)
net_circuit_add()
{
    circ_dev=$(circuit_get_interface $circ_net_if)
    if [ -z "$circ_dev" ]
    then
        eval $2=\"could not translate interface \$circ_net_if\"
        return 1
    fi

    circuit_allocate_device net circ_alias

    cat >> $1 <<EOF
circ_net_if="$circ_net_if"
EOF

    # FFL-955: disable GRO if not explicitly configured by OPT_ETHTOOL
    local gro_found= i j
    for i in $(seq 1 ${ETHTOOL_DEV_N:-0})
    do
        eval local eth_x=\$ETHTOOL_DEV_${i}
        if [ "$circ_dev" = "$eth_x" ]
        then
            eval local option_n=\$ETHTOOL_DEV_${i}_OPTION_N
            for j in $(seq 1 ${option_n:-0})
            do
                eval local option=\$ETHTOOL_DEV_${i}_OPTION_${j}_NAME
                case $option in
                gro)
                    gro_found=1
                    break
                    ;;
                esac
            done
            # note that multiple ETHTOOL_DEV_x entries may refer to the same
            # device, so we have to iterate through the whole array
            [ -n "$gro_found" ] && break
        fi
    done
    if [ -z "$gro_found" ]
    then
        log_info "  disabling GRO for $circ_dev"
        ethtool -K $circ_dev gro off 2>/dev/null
    fi

    return 0
}

# Input:
#   $1 = circuit identifier
#   $2 = layer-3 protocol
#   $3 = operation: "change" or "down"
# Exit code:
#   (when operation is "down")
#   0 if at least one address has been removed, 1 otherwise
net_circuit_change()
{
    local id=$1 l3prot=$2 op=$3 circ_dev circ_net_address old new addr

    circuit_read_field $id circ_dev
    circuit_read_field $id circ_net_address_${l3prot} circ_net_address

    case $op in
    change)
        circuit_lock $id net_circuit_change
        circuit_read_field $id circ_net_address_${l3prot}_resolved old
        new=$(circuit_resolve_address $circ_net_address $l3prot)
        circuit_write_field $id circ_net_address_${l3prot}_resolved "$new"
        circuit_unlock $id net_circuit_change

        for addr in $(list_unique $(list_sub "$old" $new))
        do
            net_circuit_remove_address_$l3prot $id $circ_dev $addr
        done

        for addr in $(list_unique $(list_sub "$new" $old))
        do
            net_circuit_add_address_$l3prot $id $circ_dev $addr
        done
        ;;
    down)
        circuit_lock $id net_circuit_change
        circuit_read_field $id circ_net_address_${l3prot}_resolved old
        circuit_write_field $id circ_net_address_${l3prot}_resolved ""
        circuit_unlock $id net_circuit_change

        for addr in $old
        do
            net_circuit_remove_address_$l3prot $id $circ_dev $addr
        done
        [ -n "$old" ]
        ;;
    esac
}

# Input:
#   $1 = identifier of circuit adding/removing a prefix
#   $2 = layer-3 protocol
net_circuit_prefix_change()
{
    local id=$1 l3prot=$2 circ type addr
    for circ in $(circuit_get_by_state ready semionline online)
    do
        circuit_read_field $circ circ_type type
        if [ "$type" = "net" ]
        then
            circuit_read_field $circ circ_net_address_${l3prot} addr
            if list_is_in $id $(circuit_get_address_dependees "$addr")
            then
                net_circuit_change $circ $l3prot change
            fi
        fi
    done
}