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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/ipnetwork-0.19.0/src/ipv4.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ipv4.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../ipnetwork/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::common</span>::{<span class="ident">cidr_parts</span>, <span class="ident">parse_prefix</span>, <span class="ident">IpNetworkError</span>};
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">fmt</span>, <span class="ident">net::Ipv4Addr</span>, <span class="ident">str::FromStr</span>, <span class="ident">convert::TryFrom</span>};
<span class="kw">const</span> <span class="ident">IPV4_BITS</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">32</span>;
<span class="doccomment">/// Represents a network range where the IP addresses are of v4</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Ipv4Network</span> {
<span class="ident">addr</span>: <span class="ident">Ipv4Addr</span>,
<span class="ident">prefix</span>: <span class="ident">u8</span>,
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"serde"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span> <span class="ident">serde::Deserialize</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Ipv4Network</span> {
<span class="kw">fn</span> <span class="ident">deserialize</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>(<span class="ident">deserializer</span>: <span class="ident">D</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident">D::Error</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">D</span>: <span class="ident">serde::Deserializer</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="op"><</span><span class="ident">String</span><span class="op">></span><span class="ident">::deserialize</span>(<span class="ident">deserializer</span>)<span class="question-mark">?</span>;
<span class="ident">Ipv4Network::from_str</span>(<span class="kw-2">&</span><span class="ident">s</span>).<span class="ident">map_err</span>(<span class="ident">serde::de::Error::custom</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"serde"</span>)]</span>
<span class="kw">impl</span> <span class="ident">serde::Serialize</span> <span class="kw">for</span> <span class="ident">Ipv4Network</span> {
<span class="kw">fn</span> <span class="ident">serialize</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">serializer</span>: <span class="ident">S</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">S::Ok</span>, <span class="ident">S::Error</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">S</span>: <span class="ident">serde::Serializer</span>,
{
<span class="ident">serializer</span>.<span class="ident">collect_str</span>(<span class="self">self</span>)
}
}
<span class="kw">impl</span> <span class="ident">Ipv4Network</span> {
<span class="doccomment">/// Constructs a new `Ipv4Network` from any `Ipv4Addr` and a prefix denoting the network size.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If the prefix is larger than 32 this will return an `IpNetworkError::InvalidPrefix`.</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">addr</span>: <span class="ident">Ipv4Addr</span>, <span class="ident">prefix</span>: <span class="ident">u8</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Ipv4Network</span>, <span class="ident">IpNetworkError</span><span class="op">></span> {
<span class="kw">if</span> <span class="ident">prefix</span> <span class="op">></span> <span class="ident">IPV4_BITS</span> {
<span class="prelude-val">Err</span>(<span class="ident">IpNetworkError::InvalidPrefix</span>)
} <span class="kw">else</span> {
<span class="prelude-val">Ok</span>(<span class="ident">Ipv4Network</span> { <span class="ident">addr</span>, <span class="ident">prefix</span> })
}
}
<span class="doccomment">/// Constructs a new `Ipv4Network` from a network address and a network mask.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If the netmask is not valid this will return an `IpNetworkError::InvalidPrefix`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">with_netmask</span>(
<span class="ident">netaddr</span>: <span class="ident">Ipv4Addr</span>,
<span class="ident">netmask</span>: <span class="ident">Ipv4Addr</span>,
) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Ipv4Network</span>, <span class="ident">IpNetworkError</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">prefix</span> <span class="op">=</span> <span class="ident">ipv4_mask_to_prefix</span>(<span class="ident">netmask</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">net</span> <span class="op">=</span> <span class="self">Self</span> {
<span class="ident">addr</span>: <span class="ident">netaddr</span>,
<span class="ident">prefix</span>,
};
<span class="prelude-val">Ok</span>(<span class="ident">net</span>)
}
<span class="doccomment">/// Returns an iterator over `Ipv4Network`. Each call to `next` will return the next</span>
<span class="doccomment">/// `Ipv4Addr` in the given network. `None` will be returned when there are no more</span>
<span class="doccomment">/// addresses.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter</span>(<span class="self">self</span>) -> <span class="ident">Ipv4NetworkIterator</span> {
<span class="kw">let</span> <span class="ident">start</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">network</span>());
<span class="kw">let</span> <span class="ident">end</span> <span class="op">=</span> <span class="ident">start</span> <span class="op">+</span> (<span class="self">self</span>.<span class="ident">size</span>() <span class="op">-</span> <span class="number">1</span>);
<span class="ident">Ipv4NetworkIterator</span> {
<span class="ident">next</span>: <span class="prelude-val">Some</span>(<span class="ident">start</span>),
<span class="ident">end</span>,
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ip</span>(<span class="self">self</span>) -> <span class="ident">Ipv4Addr</span> {
<span class="self">self</span>.<span class="ident">addr</span>
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">prefix</span>(<span class="self">self</span>) -> <span class="ident">u8</span> {
<span class="self">self</span>.<span class="ident">prefix</span>
}
<span class="doccomment">/// Checks if the given `Ipv4Network` is a subnet of the other.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_subnet_of</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Ipv4Network</span>) -> <span class="ident">bool</span> {
<span class="ident">other</span>.<span class="ident">ip</span>() <span class="op"><</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">ip</span>() <span class="op">&&</span> <span class="ident">other</span>.<span class="ident">broadcast</span>() <span class="op">></span><span class="op">=</span> <span class="self">self</span>.<span class="ident">broadcast</span>()
}
<span class="doccomment">/// Checks if the given `Ipv4Network` is a supernet of the other.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_supernet_of</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Ipv4Network</span>) -> <span class="ident">bool</span> {
<span class="ident">other</span>.<span class="ident">is_subnet_of</span>(<span class="self">self</span>)
}
<span class="doccomment">/// Checks if the given `Ipv4Network` is partly contained in other.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">overlaps</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Ipv4Network</span>) -> <span class="ident">bool</span> {
<span class="ident">other</span>.<span class="ident">contains</span>(<span class="self">self</span>.<span class="ident">ip</span>())
<span class="op">|</span><span class="op">|</span> (<span class="ident">other</span>.<span class="ident">contains</span>(<span class="self">self</span>.<span class="ident">broadcast</span>())
<span class="op">|</span><span class="op">|</span> (<span class="self">self</span>.<span class="ident">contains</span>(<span class="ident">other</span>.<span class="ident">ip</span>()) <span class="op">|</span><span class="op">|</span> (<span class="self">self</span>.<span class="ident">contains</span>(<span class="ident">other</span>.<span class="ident">broadcast</span>()))))
}
<span class="doccomment">/// Returns the mask for this `Ipv4Network`.</span>
<span class="doccomment">/// That means the `prefix` most significant bits will be 1 and the rest 0</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net: Ipv4Network = "127.0.0.0".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net.mask(), Ipv4Addr::new(255, 255, 255, 255));</span>
<span class="doccomment">/// let net: Ipv4Network = "127.0.0.0/16".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net.mask(), Ipv4Addr::new(255, 255, 0, 0));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">mask</span>(<span class="self">self</span>) -> <span class="ident">Ipv4Addr</span> {
<span class="kw">let</span> <span class="ident">prefix</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">prefix</span>;
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="op">!</span>(<span class="number">0xffff_ffff</span> <span class="kw">as</span> <span class="ident">u64</span> <span class="op">></span><span class="op">></span> <span class="ident">prefix</span>) <span class="kw">as</span> <span class="ident">u32</span>;
<span class="ident">Ipv4Addr::from</span>(<span class="ident">mask</span>)
}
<span class="doccomment">/// Returns the address of the network denoted by this `Ipv4Network`.</span>
<span class="doccomment">/// This means the lowest possible IPv4 address inside of the network.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net: Ipv4Network = "10.1.9.32/16".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net.network(), Ipv4Addr::new(10, 1, 0, 0));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">network</span>(<span class="self">self</span>) -> <span class="ident">Ipv4Addr</span> {
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">mask</span>());
<span class="kw">let</span> <span class="ident">ip</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">addr</span>) <span class="op">&</span> <span class="ident">mask</span>;
<span class="ident">Ipv4Addr::from</span>(<span class="ident">ip</span>)
}
<span class="doccomment">/// Returns the broadcasting address of this `Ipv4Network`.</span>
<span class="doccomment">/// This means the highest possible IPv4 address inside of the network.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net: Ipv4Network = "10.9.0.32/16".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net.broadcast(), Ipv4Addr::new(10, 9, 255, 255));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">broadcast</span>(<span class="self">self</span>) -> <span class="ident">Ipv4Addr</span> {
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">mask</span>());
<span class="kw">let</span> <span class="ident">broadcast</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">addr</span>) <span class="op">|</span> <span class="op">!</span><span class="ident">mask</span>;
<span class="ident">Ipv4Addr::from</span>(<span class="ident">broadcast</span>)
}
<span class="doccomment">/// Checks if a given `Ipv4Addr` is in this `Ipv4Network`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net: Ipv4Network = "127.0.0.0/24".parse().unwrap();</span>
<span class="doccomment">/// assert!(net.contains(Ipv4Addr::new(127, 0, 0, 70)));</span>
<span class="doccomment">/// assert!(!net.contains(Ipv4Addr::new(127, 0, 1, 70)));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span>(<span class="self">self</span>, <span class="ident">ip</span>: <span class="ident">Ipv4Addr</span>) -> <span class="ident">bool</span> {
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="op">!</span>(<span class="number">0xffff_ffff</span> <span class="kw">as</span> <span class="ident">u64</span> <span class="op">></span><span class="op">></span> <span class="self">self</span>.<span class="ident">prefix</span>) <span class="kw">as</span> <span class="ident">u32</span>;
<span class="kw">let</span> <span class="ident">net</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">addr</span>) <span class="op">&</span> <span class="ident">mask</span>;
(<span class="ident">u32::from</span>(<span class="ident">ip</span>) <span class="op">&</span> <span class="ident">mask</span>) <span class="op">==</span> <span class="ident">net</span>
}
<span class="doccomment">/// Returns number of possible host addresses in this `Ipv4Network`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net: Ipv4Network = "10.1.0.0/16".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net.size(), 65536);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let tinynet: Ipv4Network = "0.0.0.0/32".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(tinynet.size(), 1);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">size</span>(<span class="self">self</span>) -> <span class="ident">u32</span> {
<span class="kw">let</span> <span class="ident">host_bits</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="ident">IPV4_BITS</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">prefix</span>);
(<span class="number">2</span> <span class="kw">as</span> <span class="ident">u32</span>).<span class="ident">pow</span>(<span class="ident">host_bits</span>)
}
<span class="doccomment">/// Returns the `n`:th address within this network.</span>
<span class="doccomment">/// The adresses are indexed from 0 and `n` must be smaller than the size of the network.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net: Ipv4Network = "192.168.0.0/24".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net.nth(0).unwrap(), Ipv4Addr::new(192, 168, 0, 0));</span>
<span class="doccomment">/// assert_eq!(net.nth(15).unwrap(), Ipv4Addr::new(192, 168, 0, 15));</span>
<span class="doccomment">/// assert!(net.nth(256).is_none());</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let net2: Ipv4Network = "10.0.0.0/16".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(net2.nth(256).unwrap(), Ipv4Addr::new(10, 0, 1, 0));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">nth</span>(<span class="self">self</span>, <span class="ident">n</span>: <span class="ident">u32</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Ipv4Addr</span><span class="op">></span> {
<span class="kw">if</span> <span class="ident">n</span> <span class="op"><</span> <span class="self">self</span>.<span class="ident">size</span>() {
<span class="kw">let</span> <span class="ident">net</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="self">self</span>.<span class="ident">network</span>());
<span class="prelude-val">Some</span>(<span class="ident">Ipv4Addr::from</span>(<span class="ident">net</span> <span class="op">+</span> <span class="ident">n</span>))
} <span class="kw">else</span> {
<span class="prelude-val">None</span>
}
}
}
<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">Ipv4Network</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span>) -> <span class="ident">fmt::Result</span> {
<span class="macro">write!</span>(<span class="ident">fmt</span>, <span class="string">"{}/{}"</span>, <span class="self">self</span>.<span class="ident">ip</span>(), <span class="self">self</span>.<span class="ident">prefix</span>())
}
}
<span class="doccomment">/// Creates an `Ipv4Network` from parsing a string in CIDR notation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::net::Ipv4Addr;</span>
<span class="doccomment">/// use ipnetwork::Ipv4Network;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let new = Ipv4Network::new(Ipv4Addr::new(10, 1, 9, 32), 16).unwrap();</span>
<span class="doccomment">/// let from_cidr: Ipv4Network = "10.1.9.32/16".parse().unwrap();</span>
<span class="doccomment">/// assert_eq!(new.ip(), from_cidr.ip());</span>
<span class="doccomment">/// assert_eq!(new.prefix(), from_cidr.prefix());</span>
<span class="doccomment">/// ```</span>
<span class="kw">impl</span> <span class="ident">FromStr</span> <span class="kw">for</span> <span class="ident">Ipv4Network</span> {
<span class="kw">type</span> <span class="prelude-val">Err</span> <span class="op">=</span> <span class="ident">IpNetworkError</span>;
<span class="kw">fn</span> <span class="ident">from_str</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident"><span class="self">Self</span>::Err</span><span class="op">></span> {
<span class="kw">let</span> (<span class="ident">addr_str</span>, <span class="ident">prefix_str</span>) <span class="op">=</span> <span class="ident">cidr_parts</span>(<span class="ident">s</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">Ipv4Addr::from_str</span>(<span class="ident">addr_str</span>)
.<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">IpNetworkError::InvalidAddr</span>(<span class="ident">addr_str</span>.<span class="ident">to_string</span>()))<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">prefix</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">prefix_str</span> {
<span class="prelude-val">Some</span>(<span class="ident">v</span>) => {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">netmask</span>) <span class="op">=</span> <span class="ident">Ipv4Addr::from_str</span>(<span class="ident">v</span>) {
<span class="ident">ipv4_mask_to_prefix</span>(<span class="ident">netmask</span>)<span class="question-mark">?</span>
} <span class="kw">else</span> {
<span class="ident">parse_prefix</span>(<span class="ident">v</span>, <span class="ident">IPV4_BITS</span>)<span class="question-mark">?</span>
}
}
<span class="prelude-val">None</span> => <span class="ident">IPV4_BITS</span>,
};
<span class="ident">Ipv4Network::new</span>(<span class="ident">addr</span>, <span class="ident">prefix</span>)
}
}
<span class="kw">impl</span> <span class="ident">TryFrom</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Ipv4Network</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">IpNetworkError</span>;
<span class="kw">fn</span> <span class="ident">try_from</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident"><span class="self">Self</span>::Error</span><span class="op">></span> {
<span class="ident">Ipv4Network::from_str</span>(<span class="ident">s</span>)
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">Ipv4Addr</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Ipv4Network</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">a</span>: <span class="ident">Ipv4Addr</span>) -> <span class="ident">Ipv4Network</span> {
<span class="ident">Ipv4Network</span> {
<span class="ident">addr</span>: <span class="ident">a</span>,
<span class="ident">prefix</span>: <span class="number">32</span>,
}
}
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Ipv4NetworkIterator</span> {
<span class="ident">next</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span>,
<span class="ident">end</span>: <span class="ident">u32</span>,
}
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Ipv4NetworkIterator</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">Ipv4Addr</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Ipv4Addr</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">next</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">next</span><span class="question-mark">?</span>;
<span class="self">self</span>.<span class="ident">next</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">next</span> <span class="op">==</span> <span class="self">self</span>.<span class="ident">end</span> {
<span class="prelude-val">None</span>
} <span class="kw">else</span> {
<span class="prelude-val">Some</span>(<span class="ident">next</span> <span class="op">+</span> <span class="number">1</span>)
};
<span class="prelude-val">Some</span>(<span class="ident">next</span>.<span class="ident">into</span>())
}
}
<span class="kw">impl</span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'_</span> <span class="ident">Ipv4Network</span> {
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">Ipv4NetworkIterator</span>;
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">Ipv4Addr</span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) -> <span class="ident">Ipv4NetworkIterator</span> {
<span class="self">self</span>.<span class="ident">iter</span>()
}
}
<span class="doccomment">/// Converts a `Ipv4Addr` network mask into a prefix.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If the mask is invalid this will return an `IpNetworkError::InvalidPrefix`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ipv4_mask_to_prefix</span>(<span class="ident">mask</span>: <span class="ident">Ipv4Addr</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u8</span>, <span class="ident">IpNetworkError</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">mask</span> <span class="op">=</span> <span class="ident">u32::from</span>(<span class="ident">mask</span>);
<span class="kw">let</span> <span class="ident">prefix</span> <span class="op">=</span> (<span class="op">!</span><span class="ident">mask</span>).<span class="ident">leading_zeros</span>() <span class="kw">as</span> <span class="ident">u8</span>;
<span class="kw">if</span> (<span class="ident">u64::from</span>(<span class="ident">mask</span>) <span class="op"><</span><span class="op"><</span> <span class="ident">prefix</span>) <span class="op">&</span> <span class="number">0xffff_ffff</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> {
<span class="prelude-val">Err</span>(<span class="ident">IpNetworkError::InvalidPrefix</span>)
} <span class="kw">else</span> {
<span class="prelude-val">Ok</span>(<span class="ident">prefix</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">test</span> {
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">std::collections::HashMap</span>;
<span class="kw">use</span> <span class="ident">std::mem</span>;
<span class="kw">use</span> <span class="ident">std::net::Ipv4Addr</span>;
<span class="attribute">#[<span class="ident">test</span>]</span>