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use std::error::Error;
use std::fmt;
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
use std::str::FromStr;
/// A network, that is an IP address and a mask
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Network {
/// Represent an IPv4 network address
V4(Ipv4Addr, Ipv4Addr),
/// Represent an IPv6 network address
V6(Ipv6Addr, Ipv6Addr),
}
impl fmt::Display for Network {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match *self {
Network::V4(address, mask) => write!(fmt, "{}/{}", address, mask),
Network::V6(address, mask) => write!(fmt, "{}/{}", address, mask),
}
}
}
/// Represent an IP address. This type is similar to `std::net::IpAddr` but it supports IPv6 scope
/// identifiers.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ScopedIp {
/// Represent an IPv4 address
V4(Ipv4Addr),
/// Represent an IPv6 and its scope identifier, if any
V6(Ipv6Addr, Option<String>),
}
impl Into<IpAddr> for ScopedIp {
fn into(self) -> IpAddr {
match self {
ScopedIp::V4(ip) => IpAddr::from(ip),
ScopedIp::V6(ip, _) => IpAddr::from(ip),
}
}
}
impl<'a> Into<IpAddr> for &'a ScopedIp {
fn into(self) -> IpAddr {
match *self {
ScopedIp::V4(ref ip) => IpAddr::from(*ip),
ScopedIp::V6(ref ip, _) => IpAddr::from(*ip),
}
}
}
impl From<Ipv6Addr> for ScopedIp {
fn from(value: Ipv6Addr) -> Self {
ScopedIp::V6(value, None)
}
}
impl From<Ipv4Addr> for ScopedIp {
fn from(value: Ipv4Addr) -> Self {
ScopedIp::V4(value)
}
}
impl From<IpAddr> for ScopedIp {
fn from(value: IpAddr) -> Self {
match value {
IpAddr::V4(ip) => ScopedIp::from(ip),
IpAddr::V6(ip) => ScopedIp::from(ip),
}
}
}
impl FromStr for ScopedIp {
type Err = AddrParseError;
/// Parse a string representing an IP address.
fn from_str(s: &str) -> Result<ScopedIp, AddrParseError> {
let mut parts = s.split('%');
let addr = parts.next().unwrap();
match IpAddr::from_str(addr) {
Ok(IpAddr::V4(ip)) => {
if parts.next().is_some() {
// It's not a valid IPv4 address if it contains a '%'
Err(AddrParseError)
} else {
Ok(ScopedIp::from(ip))
}
}
Ok(IpAddr::V6(ip)) => if let Some(scope_id) = parts.next() {
if scope_id.is_empty() {
return Err(AddrParseError);
}
for c in scope_id.chars() {
if !c.is_alphanumeric() {
return Err(AddrParseError);
}
}
Ok(ScopedIp::V6(ip, Some(scope_id.to_string())))
} else {
Ok(ScopedIp::V6(ip, None))
},
Err(e) => Err(e.into()),
}
}
}
impl fmt::Display for ScopedIp {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match *self {
ScopedIp::V4(ref address) => address.fmt(fmt),
ScopedIp::V6(ref address, None) => address.fmt(fmt),
ScopedIp::V6(ref address, Some(ref scope)) => write!(fmt, "{}%{}", address, scope),
}
}
}
/// An error which can be returned when parsing an IP address.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct AddrParseError;
impl fmt::Display for AddrParseError {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str("invalid IP address syntax")
}
}
impl Error for AddrParseError {
}
impl From<::std::net::AddrParseError> for AddrParseError {
fn from(_: ::std::net::AddrParseError) -> Self {
AddrParseError
}
}
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