samples: pktgen: add some helper functions for port parsing

	echo $node_cpu_list

}

# Given a single or range of port(s), return minimum and maximum port number.

function parse_ports()

{

    local port_str=$1

    local port_list

    local min_port

    local max_port

    IFS="-" read -ra port_list <<< $port_str

    min_port=${port_list[0]}

    max_port=${port_list[1]:-$min_port}

    echo $min_port $max_port

}

# Given a minimum and maximum port, verify port number.

function validate_ports()

{

    local min_port=$1

    local max_port=$2

    # 0 < port < 65536

    if [[ $min_port -gt 0 && $min_port -lt 65536 ]]; then

	if [[ $max_port -gt 0 && $max_port -lt 65536 ]]; then

	    if [[ $min_port -le $max_port ]]; then

		return 0

	    fi

	fi

    fi

    err 5 "Invalid port(s): $min_port-$max_port"

}