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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
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| </pre><pre class="rust "> |
| <span class="doccomment">//! Network interface name resolution.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! Uses Linux and/or POSIX functions to resolve interface names like "eth0"</span> |
| <span class="doccomment">//! or "socan1" into device numbers.</span> |
| |
| <span class="kw">use</span> <span class="ident">libc</span>; |
| <span class="kw">use</span> <span class="ident">libc</span>::<span class="ident">c_uint</span>; |
| <span class="kw">use</span> {<span class="prelude-ty">Result</span>, <span class="ident">Error</span>, <span class="ident">NixPath</span>}; |
| |
| <span class="doccomment">/// Resolve an interface into a interface number.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">if_nametoindex</span><span class="op"><</span><span class="ident">P</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">NixPath</span><span class="op">></span>(<span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">P</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">c_uint</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">if_index</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">name</span>.<span class="ident">with_nix_path</span>(<span class="op">|</span><span class="ident">name</span><span class="op">|</span> <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">if_nametoindex</span>(<span class="ident">name</span>.<span class="ident">as_ptr</span>()) })); |
| |
| <span class="kw">if</span> <span class="ident">if_index</span> <span class="op">==</span> <span class="number">0</span> { |
| <span class="prelude-val">Err</span>(<span class="ident">Error</span>::<span class="ident">last</span>()) |
| } <span class="kw">else</span> { |
| <span class="prelude-val">Ok</span>(<span class="ident">if_index</span>) |
| } |
| } |
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