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use std::error::Error;
use std::fmt::{Debug, Display, Formatter};
use std::str::FromStr;
use crate::{Interval, IPv4, IPv6};
#[derive(Debug)]
pub struct ParseIpv4ScopeError;
impl Display for ParseIpv4ScopeError {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.write_str("parse ipv4 scope error")
}
}
impl Error for ParseIpv4ScopeError {}
impl FromStr for Interval<IPv4> {
type Err = ParseIpv4ScopeError;
/// eg: parse 100.0.0.1-100 to Scope(100.0.0.1, 100.0.0.100)
/// eg: parse 100.0.0.0-101.0.0.0 to Scope(100.0.0.0, 101.0.0.0)
/// eg: parse 100.0.0.1/20 to Scope(100.0.0.0, 100.0.15.255)
/// eg: parse 100.0.0.200 to Scope(100.0.0.200, 100.0.0.200)
///
/// ```
/// use std::str::FromStr;
/// use ip2c::{Interval, IPv4};
///
/// let v = Interval::<IPv4>::from_str("100.0.0.1-100").unwrap();
/// let ip = IPv4::from_str("100.0.0.1").unwrap();
/// let ip1 = IPv4::from_str("100.0.0.100").unwrap();
/// println!("{}", v.to_string());
/// assert_eq!(v, Interval(ip, ip1));
///
/// let v = Interval::<IPv4>::from_str("100.0.0.0-101.0.0.0").unwrap();
/// let ip = IPv4::from_str("100.0.0.0").unwrap();
/// let ip1 = IPv4::from_str("101.0.0.0").unwrap();
/// println!("{}", v.to_string());
/// assert_eq!(v, Interval(ip, ip1));
///
/// let v = Interval::<IPv4>::from_str("100.0.0.1/20").unwrap();
/// let ip = IPv4::from_str("100.0.0.0").unwrap();
/// let ip1 = IPv4::from_str("100.0.15.255").unwrap();
/// println!("{}", v.to_string());
/// assert_eq!(v, Interval(ip, ip1));
///
/// let v = Interval::<IPv4>::from_str("100.0.0.200").unwrap();
/// let ip = IPv4::from_str("100.0.0.200").unwrap();
/// let ip1 = IPv4::from_str("100.0.0.200").unwrap();
/// println!("{}", v.to_string());
/// assert_eq!(v, Interval(ip, ip1));
/// ```
///
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s.len() > 31 {
return Err(ParseIpv4ScopeError);
};
return if let Some(i) = s.find('-') {
let (a, b) = s.split_at(i);
let b = &b[1..];
let Ok(ip) = IPv4::from_str(a) else {
return Err(ParseIpv4ScopeError);
};
if b.contains('.') {
let Ok(ip1) = IPv4::from_str(b) else {
return Err(ParseIpv4ScopeError);
};
Ok(Interval(ip, ip1))
} else {
let Ok(n) = b.parse::<u8>() else {
return Err(ParseIpv4ScopeError);
};
let ip1 = IPv4((ip.0 & (!255)) + (n as u32));
Ok(Interval(ip, ip1))
}
} else if let Some(i) = s.find('/') {
let (a, b) = s.split_at(i);
let b = &b[1..];
let Ok(ip) = IPv4::from_str(a) else {
return Err(ParseIpv4ScopeError);
};
let Ok(n) = b.parse::<u8>() else {
return Err(ParseIpv4ScopeError);
};
if n == 0 {
if ip.0 == 0 {
Ok(Interval(IPv4(0), IPv4(u32::MAX)))
} else {
Err(ParseIpv4ScopeError)
}
} else if n == 32 {
Ok(Interval(ip, ip))
} else if n < 32 {
let add: u32 = (1 << (32 - n)) - 1;
let mask: u32 = !add;
let ip0 = IPv4(ip.0 & mask);
let ip1 = IPv4(ip0.0 + add);
Ok(Interval(ip0, ip1))
} else {
Err(ParseIpv4ScopeError)
}
} else {
let Ok(ip) = IPv4::from_str(s) else {
return Err(ParseIpv4ScopeError);
};
Ok(Interval(ip, ip))
};
}
}
#[derive(Debug)]
pub struct ParseIpv6ScopeError;
impl Display for ParseIpv6ScopeError {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.write_str("parse ipv6 scope error")
}
}
impl Error for ParseIpv6ScopeError {}
impl FromStr for Interval<IPv6> {
type Err = ParseIpv6ScopeError;
/// eg: parse from ipv6 or ipv6 network segment
/// ```
/// use std::str::FromStr;
/// use ip2c::{Interval, IPv6};
///
/// let v = Interval::<IPv6>::from_str("::1/120").unwrap();
/// let ip = IPv6::from_str("::").unwrap();
/// let ip1 = IPv6::from_str("::0.0.0.255").unwrap();
/// println!("{}", v.to_string());
/// assert_eq!(v, Interval(ip, ip1));
/// ```
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s.len() > 48 || !s.contains(':') {
return Err(ParseIpv6ScopeError);
};
return if let Some(i) = s.find('/') {
let (a, b) = s.split_at(i);
let b = &b[1..];
let Ok(ip) = IPv6::from_str(a) else {
return Err(ParseIpv6ScopeError);
};
let Ok(n) = b.parse::<u8>() else {
return Err(ParseIpv6ScopeError);
};
if n == 0 {
if ip.0 == 0 {
Ok(Interval(IPv6(0), IPv6(u128::MAX)))
} else {
Err(ParseIpv6ScopeError)
}
} else if n == 128 {
Ok(Interval(ip, ip))
} else if n < 128 {
let add: u128 = (1 << (128 - n)) - 1;
let mask: u128 = !add;
let ip0 = IPv6(ip.0 & mask);
let ip1 = IPv6(ip0.0 + add);
Ok(Interval(ip0, ip1))
} else {
Err(ParseIpv6ScopeError)
}
} else {
let Ok(ip) = IPv6::from_str(s) else {
return Err(ParseIpv6ScopeError);
};
Ok(Interval(ip, ip))
};
}
}