grep for ip address

grepip.sh

# This is a function so, source me in.
# really basic grep function to find IP/netmask octets. 
function ipgrep()
{
    # find any pattern from "0.0.0.0" to "259.259.259.259"
    # TODO fix this so it checks for legal octets (255.255.255.255) (Note: may be some time)
    grep -o -E '\b(((2[0-5]|1[0-9])|[0-9])?([0-9]){1,2}\.){3}((2[0-5]|1[0-9])|[0-9])?([0-9])\b'
}