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use ipaddress::IPAddress;
use core::result::Result;
use num::bigint::BigUint;
use core::str::FromStr;
use num_traits::One;
use num_traits::Num;
use core::ops::Rem;
use core::ops::Shl;
use core::ops::Shr;
use num_traits::Zero;
use num_traits::FromPrimitive;
use num_traits::ToPrimitive;
use prefix128;
use ipv4;
/// =Name
///
/// IPAddress::IPv6 - IP version 6 address manipulation library
///
/// =Synopsis
///
/// require 'ipaddress'
///
/// =Description
///
/// Class IPAddress::IPv6 is used to handle IPv6 type addresses.
///
/// == IPv6 addresses
///
/// IPv6 addresses are 128 bits long, in contrast with IPv4 addresses
/// which are only 32 bits long. An IPv6 address is generally written as
/// eight groups of four hexadecimal digits, each group representing 16
/// bits or two octect. For example, the following is a valid IPv6
/// address:
///
/// 2001:0db8:0000:0000:0008:0800:200c:417a
///
/// Letters in an IPv6 address are usually written downcase, as per
/// RFC. You can create a new IPv6 object using uppercase letters, but
/// they will be converted.
///
/// === Compression
///
/// Since IPv6 addresses are very long to write, there are some
/// semplifications and compressions that you can use to shorten them.
///
/// * Leading zeroes: all the leading zeroes within a group can be
/// omitted: "0008" would become "8"
///
/// * A string of consecutive zeroes can be replaced by the string
/// "::". This can be only applied once.
///
/// Using compression, the IPv6 address written above can be shorten into
/// the following, equivalent, address
///
/// 2001:db8::8:800:200c:417a
///
/// This short version is often used in human representation.
///
/// === Network Mask
///
/// As we used to do with IPv4 addresses, an IPv6 address can be written
/// using the prefix notation to specify the subnet mask:
///
/// 2001:db8::8:800:200c:417a/64
///
/// The /64 part means that the first 64 bits of the address are
/// representing the network portion, and the last 64 bits are the host
/// portion.
///
///
pub fn from_str<S: Into<String>>(_str: S, radix: u32, prefix: usize) -> Result<IPAddress, String> {
let str = _str.into();
let num = BigUint::from_str_radix(&str.clone(), radix);
if num.is_err() {
return Err(format!("unparsable {}", str));
}
return from_int(num.unwrap(), prefix);
}
pub fn enhance_if_mapped(mut ip: IPAddress) -> Result<IPAddress, String> {
// println!("real mapped {:x} {:x}", &ip.host_address, ip.host_address.clone().shr(32));
if ip.is_mapped() {
return Ok(ip);
}
let ipv6_top_96bit = ip.host_address.clone().shr(32);
if ipv6_top_96bit == BigUint::from_u32(0xffff).unwrap() {
// println!("enhance_if_mapped-1:{}", );
let num: BigUint = ip.host_address.clone().rem(BigUint::one().shl(32));
if num == BigUint::zero() {
return Ok(ip);
}
println!("ip:{},{:x}", ip.to_string(), num);
let ipv4_bits = ::ip_bits::v4();
if ipv4_bits.bits < ip.prefix.host_prefix() {
println!("enhance_if_mapped-2:{}:{}", ip.to_string(), ip.prefix.host_prefix());
return Err(format!("enhance_if_mapped prefix not ipv4 compatible {}", ip.prefix.host_prefix()));
}
let mapped = ipv4::from_u32(num.to_u32().unwrap(), ipv4_bits.bits-ip.prefix.host_prefix());
if mapped.is_err() {
println!("enhance_if_mapped-3");
return mapped;
}
// println!("real mapped!!!!!={}", mapped.clone().unwrap().to_string());
ip.mapped = Some(Box::new(mapped.unwrap()));
}
return Ok(ip);
}
pub fn from_int(adr: BigUint, prefix: usize) -> Result<IPAddress, String> {
let prefix = prefix128::new(prefix);
if prefix.is_err() {
return Err(prefix.unwrap_err());
}
return enhance_if_mapped(IPAddress {
ip_bits: ::ip_bits::v6(),
host_address: adr.clone(),
prefix: prefix.unwrap(),
mapped: None,
vt_is_private: ipv6_is_private,
vt_is_loopback: ipv6_is_loopback,
vt_to_ipv6: to_ipv6,
});
}
/// Creates a new IPv6 address object.
///
/// An IPv6 address can be expressed in any of the following forms:
///
/// * "2001:0db8:0000:0000:0008:0800:200C:417A": IPv6 address with no compression
/// * "2001:db8:0:0:8:800:200C:417A": IPv6 address with leading zeros compression
/// * "2001:db8::8:800:200C:417A": IPv6 address with full compression
///
/// In all these 3 cases, a new IPv6 address object will be created, using the default
/// subnet mask /128
///
/// You can also specify the subnet mask as with IPv4 addresses:
///
/// ip6 = IPAddress "2001:db8::8:800:200c:417a/64"
///
pub fn new<S: Into<String>>(_str: S) -> Result<IPAddress, String> {
let str = _str.into();
let (ip, o_netmask) = IPAddress::split_at_slash(&str);
if IPAddress::is_valid_ipv6(ip.clone()) {
let o_num = IPAddress::split_to_num(&ip);
if o_num.is_err() {
return Err(o_num.unwrap_err());
}
let mut netmask = 128;
if o_netmask.is_some() {
let network = o_netmask.unwrap();
let num_mask = u8::from_str(&network);
if num_mask.is_err() {
return Err(format!("Invalid Netmask {}", str));
}
netmask = network.parse::<usize>().unwrap();
}
let prefix = ::prefix128::new(netmask);
if prefix.is_err() {
return Err(prefix.unwrap_err());
}
return enhance_if_mapped(IPAddress {
ip_bits: ::ip_bits::v6(),
host_address: o_num.unwrap(),
prefix: prefix.unwrap(),
mapped: None,
vt_is_private: ipv6_is_private,
vt_is_loopback: ipv6_is_loopback,
vt_to_ipv6: to_ipv6
});
} else {
return Err(format!("Invalid IP {}", str));
}
}
pub fn to_ipv6(ia: &IPAddress) -> IPAddress {
return ia.clone();
}
pub fn ipv6_is_loopback(my: &IPAddress) -> bool {
return my.host_address == BigUint::one();
}
pub fn ipv6_is_private(my: &IPAddress) -> bool {
return IPAddress::parse("fd00::/8").unwrap().includes(my);
}