# Validate an IP address
#
# usage: ynh_validate_ip [family] [ip_address]
# | ret: 0 for valid ip addresses, 1 otherwise
#
# example: ynh_validate_ip 4 111.222.333.444
#
ynh_validate_ip()
{
  # http://stackoverflow.com/questions/319279/how-to-validate-ip-address-in-python#319298

  local IP_ADDRESS_FAMILY=$1
  local IP_ADDRESS=$2

  [ "$IP_ADDRESS_FAMILY" == "4" ] || [ "$IP_ADDRESS_FAMILY" == "6" ] || return 1

  python /dev/stdin << EOF
import socket
import sys
family = { "4" : socket.AF_INET, "6" : socket.AF_INET6 }
try:
    socket.inet_pton(family["$IP_ADDRESS_FAMILY"], "$IP_ADDRESS")
except socket.error:
    sys.exit(1)
sys.exit(0)
EOF
}

# Validate an IPv4 address
#
# example: ynh_validate_ip4 111.222.333.444
#
# usage: ynh_validate_ip4 <ip_address>
# | ret: 0 for valid ipv4 addresses, 1 otherwise
#
ynh_validate_ip4()
{
  ynh_validate_ip 4 $1
}


# Validate an IPv6 address
#
# example: ynh_validate_ip6 2000:dead:beef::1
#
# usage: ynh_validate_ip6 <ip_address>
# | ret: 0 for valid ipv6 addresses, 1 otherwise
#
ynh_validate_ip6()
{
  ynh_validate_ip 6 $1
}