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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
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| <span id="545">545</span> |
| <span id="546">546</span> |
| <span id="547">547</span> |
| <span id="548">548</span> |
| <span id="549">549</span> |
| <span id="550">550</span> |
| <span id="551">551</span> |
| <span id="552">552</span> |
| <span id="553">553</span> |
| <span id="554">554</span> |
| <span id="555">555</span> |
| <span id="556">556</span> |
| <span id="557">557</span> |
| <span id="558">558</span> |
| <span id="559">559</span> |
| <span id="560">560</span> |
| <span id="561">561</span> |
| <span id="562">562</span> |
| <span id="563">563</span> |
| <span id="564">564</span> |
| <span id="565">565</span> |
| <span id="566">566</span> |
| <span id="567">567</span> |
| <span id="568">568</span> |
| <span id="569">569</span> |
| <span id="570">570</span> |
| <span id="571">571</span> |
| <span id="572">572</span> |
| <span id="573">573</span> |
| <span id="574">574</span> |
| <span id="575">575</span> |
| <span id="576">576</span> |
| <span id="577">577</span> |
| <span id="578">578</span> |
| <span id="579">579</span> |
| <span id="580">580</span> |
| <span id="581">581</span> |
| <span id="582">582</span> |
| <span id="583">583</span> |
| <span id="584">584</span> |
| <span id="585">585</span> |
| <span id="586">586</span> |
| <span id="587">587</span> |
| <span id="588">588</span> |
| <span id="589">589</span> |
| <span id="590">590</span> |
| <span id="591">591</span> |
| <span id="592">592</span> |
| <span id="593">593</span> |
| <span id="594">594</span> |
| <span id="595">595</span> |
| <span id="596">596</span> |
| <span id="597">597</span> |
| <span id="598">598</span> |
| <span id="599">599</span> |
| <span id="600">600</span> |
| <span id="601">601</span> |
| <span id="602">602</span> |
| <span id="603">603</span> |
| <span id="604">604</span> |
| <span id="605">605</span> |
| <span id="606">606</span> |
| <span id="607">607</span> |
| <span id="608">608</span> |
| <span id="609">609</span> |
| <span id="610">610</span> |
| <span id="611">611</span> |
| <span id="612">612</span> |
| <span id="613">613</span> |
| <span id="614">614</span> |
| <span id="615">615</span> |
| <span id="616">616</span> |
| <span id="617">617</span> |
| <span id="618">618</span> |
| <span id="619">619</span> |
| <span id="620">620</span> |
| <span id="621">621</span> |
| <span id="622">622</span> |
| <span id="623">623</span> |
| <span id="624">624</span> |
| <span id="625">625</span> |
| <span id="626">626</span> |
| <span id="627">627</span> |
| <span id="628">628</span> |
| <span id="629">629</span> |
| <span id="630">630</span> |
| <span id="631">631</span> |
| <span id="632">632</span> |
| <span id="633">633</span> |
| <span id="634">634</span> |
| <span id="635">635</span> |
| <span id="636">636</span> |
| <span id="637">637</span> |
| <span id="638">638</span> |
| <span id="639">639</span> |
| <span id="640">640</span> |
| <span id="641">641</span> |
| <span id="642">642</span> |
| <span id="643">643</span> |
| <span id="644">644</span> |
| <span id="645">645</span> |
| <span id="646">646</span> |
| <span id="647">647</span> |
| <span id="648">648</span> |
| <span id="649">649</span> |
| <span id="650">650</span> |
| <span id="651">651</span> |
| <span id="652">652</span> |
| <span id="653">653</span> |
| <span id="654">654</span> |
| <span id="655">655</span> |
| <span id="656">656</span> |
| <span id="657">657</span> |
| <span id="658">658</span> |
| <span id="659">659</span> |
| <span id="660">660</span> |
| <span id="661">661</span> |
| <span id="662">662</span> |
| <span id="663">663</span> |
| <span id="664">664</span> |
| <span id="665">665</span> |
| <span id="666">666</span> |
| <span id="667">667</span> |
| <span id="668">668</span> |
| <span id="669">669</span> |
| <span id="670">670</span> |
| <span id="671">671</span> |
| <span id="672">672</span> |
| <span id="673">673</span> |
| <span id="674">674</span> |
| <span id="675">675</span> |
| <span id="676">676</span> |
| <span id="677">677</span> |
| </pre><pre class="rust "> |
| <span class="doccomment">//! Socket interface functions</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! [Further reading](http://man7.org/linux/man-pages/man7/socket.7.html)</span> |
| <span class="kw">use</span> {<span class="ident">Error</span>, <span class="ident">Errno</span>, <span class="prelude-ty">Result</span>}; |
| <span class="kw">use</span> <span class="ident">features</span>; |
| <span class="kw">use</span> <span class="ident">fcntl</span>::{<span class="ident">fcntl</span>, <span class="ident">FD_CLOEXEC</span>, <span class="ident">O_NONBLOCK</span>}; |
| <span class="kw">use</span> <span class="ident">fcntl</span>::<span class="ident">FcntlArg</span>::{<span class="ident">F_SETFD</span>, <span class="ident">F_SETFL</span>}; |
| <span class="kw">use</span> <span class="ident">libc</span>::{<span class="ident">c_void</span>, <span class="ident">c_int</span>, <span class="ident">socklen_t</span>, <span class="ident">size_t</span>, <span class="ident">pid_t</span>, <span class="ident">uid_t</span>, <span class="ident">gid_t</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">mem</span>, <span class="ident">ptr</span>, <span class="ident">slice</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">RawFd</span>; |
| <span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">uio</span>::<span class="ident">IoVec</span>; |
| |
| <span class="kw">mod</span> <span class="ident">addr</span>; |
| <span class="kw">mod</span> <span class="ident">consts</span>; |
| <span class="kw">mod</span> <span class="ident">ffi</span>; |
| <span class="kw">mod</span> <span class="ident">multicast</span>; |
| <span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">sockopt</span>; |
| |
| <span class="comment">/* |
| * |
| * ===== Re-exports ===== |
| * |
| */</span> |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">addr</span>::{ |
| <span class="ident">AddressFamily</span>, |
| <span class="ident">SockAddr</span>, |
| <span class="ident">InetAddr</span>, |
| <span class="ident">UnixAddr</span>, |
| <span class="ident">IpAddr</span>, |
| <span class="ident">Ipv4Addr</span>, |
| <span class="ident">Ipv6Addr</span>, |
| }; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>))]</span> |
| <span class="kw">pub</span> <span class="kw">use</span> ::<span class="ident">sys</span>::<span class="ident">socket</span>::<span class="ident">addr</span>::<span class="ident">netlink</span>::<span class="ident">NetlinkAddr</span>; |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="ident">libc</span>::{ |
| <span class="ident">in_addr</span>, |
| <span class="ident">in6_addr</span>, |
| <span class="ident">sockaddr</span>, |
| <span class="ident">sockaddr_in</span>, |
| <span class="ident">sockaddr_in6</span>, |
| <span class="ident">sockaddr_un</span>, |
| <span class="ident">sa_family_t</span>, |
| }; |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">multicast</span>::{ |
| <span class="ident">ip_mreq</span>, |
| <span class="ident">ipv6_mreq</span>, |
| }; |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">consts</span>::<span class="kw-2">*</span>; |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="ident">libc</span>::<span class="ident">sockaddr_storage</span>; |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Debug</span>)]</span> |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">i32</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">SockType</span> { |
| <span class="ident">Stream</span> <span class="op">=</span> <span class="ident">consts</span>::<span class="ident">SOCK_STREAM</span>, |
| <span class="ident">Datagram</span> <span class="op">=</span> <span class="ident">consts</span>::<span class="ident">SOCK_DGRAM</span>, |
| <span class="ident">SeqPacket</span> <span class="op">=</span> <span class="ident">consts</span>::<span class="ident">SOCK_SEQPACKET</span>, |
| <span class="ident">Raw</span> <span class="op">=</span> <span class="ident">consts</span>::<span class="ident">SOCK_RAW</span>, |
| <span class="ident">Rdm</span> <span class="op">=</span> <span class="ident">consts</span>::<span class="ident">SOCK_RDM</span>, |
| } |
| |
| <span class="comment">// Extra flags - Supported by Linux 2.6.27, normalized on other platforms</span> |
| <span class="macro">bitflags</span><span class="macro">!</span>( |
| <span class="kw">pub</span> <span class="ident">flags</span> <span class="ident">SockFlag</span>: <span class="ident">c_int</span> { |
| <span class="kw">const</span> <span class="ident">SOCK_NONBLOCK</span> <span class="op">=</span> <span class="number">0o0004000</span>, |
| <span class="kw">const</span> <span class="ident">SOCK_CLOEXEC</span> <span class="op">=</span> <span class="number">0o2000000</span> |
| } |
| ); |
| |
| <span class="doccomment">/// Copy the in-memory representation of src into the byte slice dst,</span> |
| <span class="doccomment">/// updating the slice to point to the remainder of dst only. Unsafe</span> |
| <span class="doccomment">/// because it exposes all bytes in src, which may be UB if some of them</span> |
| <span class="doccomment">/// are uninitialized (including padding).</span> |
| <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">copy_bytes</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>, <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">dst</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="kw-2">&</span><span class="lifetime">'b</span> <span class="kw-2">mut</span> [<span class="ident">u8</span>]) { |
| <span class="kw">let</span> <span class="ident">srclen</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="ident">src</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tmpdst</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">mut</span> [][..]; |
| <span class="ident">mem</span>::<span class="ident">swap</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">tmpdst</span>, <span class="ident">dst</span>); |
| <span class="kw">let</span> (<span class="ident">target</span>, <span class="kw-2">mut</span> <span class="ident">remainder</span>) <span class="op">=</span> <span class="ident">tmpdst</span>.<span class="ident">split_at_mut</span>(<span class="ident">srclen</span>); |
| <span class="comment">// Safe because the mutable borrow of dst guarantees that src does not alias it.</span> |
| <span class="ident">ptr</span>::<span class="ident">copy_nonoverlapping</span>(<span class="ident">src</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">T</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">u8</span>, <span class="ident">target</span>.<span class="ident">as_mut_ptr</span>(), <span class="ident">srclen</span>); |
| <span class="ident">mem</span>::<span class="ident">swap</span>(<span class="ident">dst</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">remainder</span>); |
| } |
| |
| |
| <span class="kw">use</span> <span class="self">self</span>::<span class="ident">ffi</span>::{<span class="ident">cmsghdr</span>, <span class="ident">msghdr</span>, <span class="ident">type_of_cmsg_len</span>, <span class="ident">type_of_cmsg_data</span>}; |
| |
| <span class="doccomment">/// A structure used to make room in a cmsghdr passed to recvmsg. The</span> |
| <span class="doccomment">/// size and alignment match that of a cmsghdr followed by a T, but the</span> |
| <span class="doccomment">/// fields are not accessible, as the actual types will change on a call</span> |
| <span class="doccomment">/// to recvmsg.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// To make room for multiple messages, nest the type parameter with</span> |
| <span class="doccomment">/// tuples, e.g.</span> |
| <span class="doccomment">/// `let cmsg: CmsgSpace<([RawFd; 3], CmsgSpace<[RawFd; 2]>)> = CmsgSpace::new();`</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CmsgSpace</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="ident">_hdr</span>: <span class="ident">cmsghdr</span>, |
| <span class="ident">_data</span>: <span class="ident">T</span>, |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">CmsgSpace</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="doccomment">/// Create a CmsgSpace<T>. The structure is used only for space, so</span> |
| <span class="doccomment">/// the fields are uninitialized.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="self">Self</span> { |
| <span class="comment">// Safe because the fields themselves aren't accessible.</span> |
| <span class="kw">unsafe</span> { <span class="ident">mem</span>::<span class="ident">uninitialized</span>() } |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RecvMsg</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { |
| <span class="comment">// The number of bytes received.</span> |
| <span class="kw">pub</span> <span class="ident">bytes</span>: <span class="ident">usize</span>, |
| <span class="ident">cmsg_buffer</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>], |
| <span class="kw">pub</span> <span class="ident">address</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">SockAddr</span><span class="op">></span>, |
| <span class="kw">pub</span> <span class="ident">flags</span>: <span class="ident">MsgFlags</span>, |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">RecvMsg</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { |
| <span class="doccomment">/// Iterate over the valid control messages pointed to by this</span> |
| <span class="doccomment">/// msghdr.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cmsgs</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">CmsgIterator</span> { |
| <span class="ident">CmsgIterator</span>(<span class="self">self</span>.<span class="ident">cmsg_buffer</span>) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CmsgIterator</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>]); |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">CmsgIterator</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { |
| <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">ControlMessage</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>; |
| |
| <span class="comment">// The implementation loosely follows CMSG_FIRSTHDR / CMSG_NXTHDR,</span> |
| <span class="comment">// although we handle the invariants in slightly different places to</span> |
| <span class="comment">// get a better iterator interface.</span> |
| <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">ControlMessage</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">>></span> { |
| <span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span>; |
| <span class="kw">let</span> <span class="ident">sizeof_cmsghdr</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">cmsghdr</span><span class="op">></span>(); |
| <span class="kw">if</span> <span class="ident">buf</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="ident">sizeof_cmsghdr</span> { |
| <span class="kw">return</span> <span class="prelude-val">None</span>; |
| } |
| <span class="kw">let</span> <span class="ident">cmsg</span>: <span class="kw-2">&</span><span class="ident">cmsghdr</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">buf</span>.<span class="ident">as_ptr</span>()) }; |
| |
| <span class="comment">// This check is only in the glibc implementation of CMSG_NXTHDR</span> |
| <span class="comment">// (although it claims the kernel header checks this), but such</span> |
| <span class="comment">// a structure is clearly invalid, either way.</span> |
| <span class="kw">let</span> <span class="ident">cmsg_len</span> <span class="op">=</span> <span class="ident">cmsg</span>.<span class="ident">cmsg_len</span> <span class="kw">as</span> <span class="ident">usize</span>; |
| <span class="kw">if</span> <span class="ident">cmsg_len</span> <span class="op"><</span> <span class="ident">sizeof_cmsghdr</span> { |
| <span class="kw">return</span> <span class="prelude-val">None</span>; |
| } |
| <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">cmsg_len</span> <span class="op">-</span> <span class="ident">sizeof_cmsghdr</span>; |
| |
| <span class="comment">// Advance our internal pointer.</span> |
| <span class="kw">if</span> <span class="ident">cmsg_align</span>(<span class="ident">cmsg_len</span>) <span class="op">></span> <span class="ident">buf</span>.<span class="ident">len</span>() { |
| <span class="kw">return</span> <span class="prelude-val">None</span>; |
| } |
| <span class="self">self</span>.<span class="number">0</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">buf</span>[<span class="ident">cmsg_align</span>(<span class="ident">cmsg_len</span>)..]; |
| |
| <span class="kw">match</span> (<span class="ident">cmsg</span>.<span class="ident">cmsg_level</span>, <span class="ident">cmsg</span>.<span class="ident">cmsg_type</span>) { |
| (<span class="ident">SOL_SOCKET</span>, <span class="ident">SCM_RIGHTS</span>) <span class="op">=></span> <span class="kw">unsafe</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">ControlMessage</span>::<span class="ident">ScmRights</span>( |
| <span class="ident">slice</span>::<span class="ident">from_raw_parts</span>( |
| <span class="kw-2">&</span><span class="ident">cmsg</span>.<span class="ident">cmsg_data</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _, <span class="number">1</span>))) |
| }, |
| (_, _) <span class="op">=></span> <span class="kw">unsafe</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">ControlMessage</span>::<span class="ident">Unknown</span>(<span class="ident">UnknownCmsg</span>( |
| <span class="kw-2">&</span><span class="ident">cmsg</span>, |
| <span class="ident">slice</span>::<span class="ident">from_raw_parts</span>( |
| <span class="kw-2">&</span><span class="ident">cmsg</span>.<span class="ident">cmsg_data</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _, |
| <span class="ident">len</span>)))) |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// A type-safe wrapper around a single control message. More types may</span> |
| <span class="doccomment">/// be added to this enum; do not exhaustively pattern-match it.</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man3/cmsg.3.html)</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ControlMessage</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { |
| <span class="doccomment">/// A message of type SCM_RIGHTS, containing an array of file</span> |
| <span class="doccomment">/// descriptors passed between processes. See the description in the</span> |
| <span class="doccomment">/// "Ancillary messages" section of the</span> |
| <span class="doccomment">/// [unix(7) man page](http://man7.org/linux/man-pages/man7/unix.7.html).</span> |
| <span class="ident">ScmRights</span>(<span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">RawFd</span>]), |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="ident">Unknown</span>(<span class="ident">UnknownCmsg</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>), |
| } |
| |
| <span class="comment">// An opaque structure used to prevent cmsghdr from being a public type</span> |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">UnknownCmsg</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">cmsghdr</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>]); |
| |
| <span class="kw">fn</span> <span class="ident">cmsg_align</span>(<span class="ident">len</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="kw">let</span> <span class="ident">align_bytes</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">type_of_cmsg_data</span><span class="op">></span>() <span class="op">-</span> <span class="number">1</span>; |
| (<span class="ident">len</span> <span class="op">+</span> <span class="ident">align_bytes</span>) <span class="op">&</span> <span class="op">!</span><span class="ident">align_bytes</span> |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">ControlMessage</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { |
| <span class="doccomment">/// The value of CMSG_SPACE on this message.</span> |
| <span class="kw">fn</span> <span class="ident">space</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="ident">cmsg_align</span>(<span class="self">self</span>.<span class="ident">len</span>()) |
| } |
| |
| <span class="doccomment">/// The value of CMSG_LEN on this message.</span> |
| <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="ident">cmsg_align</span>(<span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">cmsghdr</span><span class="op">></span>()) <span class="op">+</span> <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> { |
| <span class="ident">ControlMessage</span>::<span class="ident">ScmRights</span>(<span class="ident">fds</span>) <span class="op">=></span> { |
| <span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="ident">fds</span>) |
| }, |
| <span class="ident">ControlMessage</span>::<span class="ident">Unknown</span>(<span class="ident">UnknownCmsg</span>(_, <span class="ident">bytes</span>)) <span class="op">=></span> { |
| <span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="ident">bytes</span>) |
| } |
| } |
| } |
| |
| <span class="comment">// Unsafe: start and end of buffer must be size_t-aligned (that is,</span> |
| <span class="comment">// cmsg_align'd). Updates the provided slice; panics if the buffer</span> |
| <span class="comment">// is too small.</span> |
| <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">encode_into</span><span class="op"><</span><span class="lifetime">'b</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">&</span><span class="lifetime">'b</span> <span class="kw-2">mut</span> [<span class="ident">u8</span>]) { |
| <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> { |
| <span class="ident">ControlMessage</span>::<span class="ident">ScmRights</span>(<span class="ident">fds</span>) <span class="op">=></span> { |
| <span class="kw">let</span> <span class="ident">cmsg</span> <span class="op">=</span> <span class="ident">cmsghdr</span> { |
| <span class="ident">cmsg_len</span>: <span class="self">self</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">type_of_cmsg_len</span>, |
| <span class="ident">cmsg_level</span>: <span class="ident">SOL_SOCKET</span>, |
| <span class="ident">cmsg_type</span>: <span class="ident">SCM_RIGHTS</span>, |
| <span class="ident">cmsg_data</span>: [], |
| }; |
| <span class="ident">copy_bytes</span>(<span class="kw-2">&</span><span class="ident">cmsg</span>, <span class="ident">buf</span>); |
| |
| <span class="kw">let</span> <span class="ident">padlen</span> <span class="op">=</span> <span class="ident">cmsg_align</span>(<span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="kw-2">&</span><span class="ident">cmsg</span>)) <span class="op">-</span> |
| <span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="kw-2">&</span><span class="ident">cmsg</span>); |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tmpbuf</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">mut</span> [][..]; |
| <span class="ident">mem</span>::<span class="ident">swap</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">tmpbuf</span>, <span class="ident">buf</span>); |
| <span class="kw">let</span> (<span class="ident">_padding</span>, <span class="kw-2">mut</span> <span class="ident">remainder</span>) <span class="op">=</span> <span class="ident">tmpbuf</span>.<span class="ident">split_at_mut</span>(<span class="ident">padlen</span>); |
| <span class="ident">mem</span>::<span class="ident">swap</span>(<span class="ident">buf</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">remainder</span>); |
| |
| <span class="ident">copy_bytes</span>(<span class="ident">fds</span>, <span class="ident">buf</span>); |
| }, |
| <span class="ident">ControlMessage</span>::<span class="ident">Unknown</span>(<span class="ident">UnknownCmsg</span>(<span class="ident">orig_cmsg</span>, <span class="ident">bytes</span>)) <span class="op">=></span> { |
| <span class="ident">copy_bytes</span>(<span class="ident">orig_cmsg</span>, <span class="ident">buf</span>); |
| <span class="ident">copy_bytes</span>(<span class="ident">bytes</span>, <span class="ident">buf</span>); |
| } |
| } |
| } |
| } |
| |
| |
| <span class="doccomment">/// Send data in scatter-gather vectors to a socket, possibly accompanied</span> |
| <span class="doccomment">/// by ancillary data. Optionally direct the message at the given address,</span> |
| <span class="doccomment">/// as with sendto.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Allocates if cmsgs is nonempty.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">sendmsg</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">iov</span>: <span class="kw-2">&</span>[<span class="ident">IoVec</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>]<span class="op">></span>], <span class="ident">cmsgs</span>: <span class="kw-2">&</span>[<span class="ident">ControlMessage</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>], <span class="ident">flags</span>: <span class="ident">MsgFlags</span>, <span class="ident">addr</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">SockAddr</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="number">0</span>; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">capacity</span> <span class="op">=</span> <span class="number">0</span>; |
| <span class="kw">for</span> <span class="ident">cmsg</span> <span class="kw">in</span> <span class="ident">cmsgs</span> { |
| <span class="ident">len</span> <span class="op">+=</span> <span class="ident">cmsg</span>.<span class="ident">len</span>(); |
| <span class="ident">capacity</span> <span class="op">+=</span> <span class="ident">cmsg</span>.<span class="ident">space</span>(); |
| } |
| <span class="comment">// Alignment hackery. Note that capacity is guaranteed to be a</span> |
| <span class="comment">// multiple of size_t. Note also that the resulting vector claims</span> |
| <span class="comment">// to have length == capacity, so it's presently uninitialized.</span> |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cmsg_buffer</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">vec</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="op"><</span><span class="ident">u8</span><span class="op">></span>::<span class="ident">with_capacity</span>(<span class="ident">len</span>); |
| <span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">vec</span>.<span class="ident">as_mut_ptr</span>(); |
| <span class="ident">mem</span>::<span class="ident">forget</span>(<span class="ident">vec</span>); |
| <span class="ident">Vec</span>::<span class="op"><</span><span class="ident">u8</span><span class="op">></span>::<span class="ident">from_raw_parts</span>(<span class="ident">ptr</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _, <span class="ident">len</span>, <span class="ident">len</span>) |
| }; |
| { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">cmsg_buffer</span>[..]; |
| <span class="kw">for</span> <span class="ident">cmsg</span> <span class="kw">in</span> <span class="ident">cmsgs</span> { |
| <span class="kw">unsafe</span> { <span class="ident">cmsg</span>.<span class="ident">encode_into</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">ptr</span>) }; |
| } |
| } |
| |
| <span class="kw">let</span> (<span class="ident">name</span>, <span class="ident">namelen</span>) <span class="op">=</span> <span class="kw">match</span> <span class="ident">addr</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">addr</span>) <span class="op">=></span> { <span class="kw">let</span> (<span class="ident">x</span>, <span class="ident">y</span>) <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">addr</span>.<span class="ident">as_ffi_pair</span>() }; (<span class="ident">x</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _, <span class="ident">y</span>) } |
| <span class="prelude-val">None</span> <span class="op">=></span> (<span class="number">0</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _, <span class="number">0</span>), |
| }; |
| |
| <span class="kw">let</span> <span class="ident">mhdr</span> <span class="op">=</span> <span class="ident">msghdr</span> { |
| <span class="ident">msg_name</span>: <span class="ident">name</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_void</span>, |
| <span class="ident">msg_namelen</span>: <span class="ident">namelen</span>, |
| <span class="ident">msg_iov</span>: <span class="ident">iov</span>.<span class="ident">as_ptr</span>(), |
| <span class="ident">msg_iovlen</span>: <span class="ident">iov</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">size_t</span>, |
| <span class="ident">msg_control</span>: <span class="ident">cmsg_buffer</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_void</span>, |
| <span class="ident">msg_controllen</span>: <span class="ident">capacity</span> <span class="kw">as</span> <span class="ident">size_t</span>, |
| <span class="ident">msg_flags</span>: <span class="number">0</span>, |
| }; |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">ffi</span>::<span class="ident">sendmsg</span>(<span class="ident">fd</span>, <span class="kw-2">&</span><span class="ident">mhdr</span>, <span class="ident">flags</span>.<span class="ident">bits</span>()) }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| |
| <span class="doccomment">/// Receive message in scatter-gather vectors from a socket, and</span> |
| <span class="doccomment">/// optionally receive ancillary data into the provided buffer.</span> |
| <span class="doccomment">/// If no ancillary data is desired, use () as the type parameter.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recvmsg</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">iov</span>: <span class="kw-2">&</span>[<span class="ident">IoVec</span><span class="op"><</span><span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]<span class="op">></span>], <span class="ident">cmsg_buffer</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">CmsgSpace</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>, <span class="ident">flags</span>: <span class="ident">MsgFlags</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">RecvMsg</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">>></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">address</span>: <span class="ident">sockaddr_storage</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">mem</span>::<span class="ident">uninitialized</span>() }; |
| <span class="kw">let</span> (<span class="ident">msg_control</span>, <span class="ident">msg_controllen</span>) <span class="op">=</span> <span class="kw">match</span> <span class="ident">cmsg_buffer</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">cmsg_buffer</span>) <span class="op">=></span> (<span class="ident">cmsg_buffer</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _, <span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="ident">cmsg_buffer</span>)), |
| <span class="prelude-val">None</span> <span class="op">=></span> (<span class="number">0</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _, <span class="number">0</span>), |
| }; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mhdr</span> <span class="op">=</span> <span class="ident">msghdr</span> { |
| <span class="ident">msg_name</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">address</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_void</span>, |
| <span class="ident">msg_namelen</span>: <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">sockaddr_storage</span><span class="op">></span>() <span class="kw">as</span> <span class="ident">socklen_t</span>, |
| <span class="ident">msg_iov</span>: <span class="ident">iov</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">IoVec</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">u8</span>]<span class="op">></span>, <span class="comment">// safe cast to add const-ness</span> |
| <span class="ident">msg_iovlen</span>: <span class="ident">iov</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">size_t</span>, |
| <span class="ident">msg_control</span>: <span class="ident">msg_control</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_void</span>, |
| <span class="ident">msg_controllen</span>: <span class="ident">msg_controllen</span> <span class="kw">as</span> <span class="ident">size_t</span>, |
| <span class="ident">msg_flags</span>: <span class="number">0</span>, |
| }; |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">ffi</span>::<span class="ident">recvmsg</span>(<span class="ident">fd</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">mhdr</span>, <span class="ident">flags</span>.<span class="ident">bits</span>()) }; |
| |
| <span class="prelude-val">Ok</span>(<span class="kw">unsafe</span> { <span class="ident">RecvMsg</span> { |
| <span class="ident">bytes</span>: <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>)) <span class="kw">as</span> <span class="ident">usize</span>, |
| <span class="ident">cmsg_buffer</span>: <span class="ident">slice</span>::<span class="ident">from_raw_parts</span>(<span class="ident">mhdr</span>.<span class="ident">msg_control</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">u8</span>, |
| <span class="ident">mhdr</span>.<span class="ident">msg_controllen</span> <span class="kw">as</span> <span class="ident">usize</span>), |
| <span class="ident">address</span>: <span class="ident">sockaddr_storage_to_addr</span>(<span class="kw-2">&</span><span class="ident">address</span>, |
| <span class="ident">mhdr</span>.<span class="ident">msg_namelen</span> <span class="kw">as</span> <span class="ident">usize</span>).<span class="ident">ok</span>(), |
| <span class="ident">flags</span>: <span class="ident">MsgFlags</span>::<span class="ident">from_bits_truncate</span>(<span class="ident">mhdr</span>.<span class="ident">msg_flags</span>), |
| } }) |
| } |
| |
| |
| <span class="doccomment">/// Create an endpoint for communication</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/socket.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">socket</span>(<span class="ident">domain</span>: <span class="ident">AddressFamily</span>, <span class="ident">ty</span>: <span class="ident">SockType</span>, <span class="ident">flags</span>: <span class="ident">SockFlag</span>, <span class="ident">protocol</span>: <span class="ident">c_int</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">RawFd</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ty</span> <span class="op">=</span> <span class="ident">ty</span> <span class="kw">as</span> <span class="ident">c_int</span>; |
| <span class="kw">let</span> <span class="ident">feat_atomic</span> <span class="op">=</span> <span class="ident">features</span>::<span class="ident">socket_atomic_cloexec</span>(); |
| |
| <span class="kw">if</span> <span class="ident">feat_atomic</span> { |
| <span class="ident">ty</span> <span class="op">=</span> <span class="ident">ty</span> <span class="op">|</span> <span class="ident">flags</span>.<span class="ident">bits</span>(); |
| } |
| |
| <span class="comment">// TODO: Check the kernel version</span> |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="kw">unsafe</span> { <span class="ident">ffi</span>::<span class="ident">socket</span>(<span class="ident">domain</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">ty</span>, <span class="ident">protocol</span>) })); |
| |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">feat_atomic</span> { |
| <span class="kw">if</span> <span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">SOCK_CLOEXEC</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">res</span>, <span class="ident">F_SETFD</span>(<span class="ident">FD_CLOEXEC</span>))); |
| } |
| |
| <span class="kw">if</span> <span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">SOCK_NONBLOCK</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">res</span>, <span class="ident">F_SETFL</span>(<span class="ident">O_NONBLOCK</span>))); |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(<span class="ident">res</span>) |
| } |
| |
| <span class="doccomment">/// Create a pair of connected sockets</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/socketpair.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">socketpair</span>(<span class="ident">domain</span>: <span class="ident">AddressFamily</span>, <span class="ident">ty</span>: <span class="ident">SockType</span>, <span class="ident">protocol</span>: <span class="ident">c_int</span>, |
| <span class="ident">flags</span>: <span class="ident">SockFlag</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">RawFd</span>, <span class="ident">RawFd</span>)<span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ty</span> <span class="op">=</span> <span class="ident">ty</span> <span class="kw">as</span> <span class="ident">c_int</span>; |
| <span class="kw">let</span> <span class="ident">feat_atomic</span> <span class="op">=</span> <span class="ident">features</span>::<span class="ident">socket_atomic_cloexec</span>(); |
| |
| <span class="kw">if</span> <span class="ident">feat_atomic</span> { |
| <span class="ident">ty</span> <span class="op">=</span> <span class="ident">ty</span> <span class="op">|</span> <span class="ident">flags</span>.<span class="ident">bits</span>(); |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">fds</span> <span class="op">=</span> [<span class="op">-</span><span class="number">1</span>, <span class="op">-</span><span class="number">1</span>]; |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="ident">ffi</span>::<span class="ident">socketpair</span>(<span class="ident">domain</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">ty</span>, <span class="ident">protocol</span>, <span class="ident">fds</span>.<span class="ident">as_mut_ptr</span>()) |
| }; |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>)); |
| |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">feat_atomic</span> { |
| <span class="kw">if</span> <span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">SOCK_CLOEXEC</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">fds</span>[<span class="number">0</span>], <span class="ident">F_SETFD</span>(<span class="ident">FD_CLOEXEC</span>))); |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">fds</span>[<span class="number">1</span>], <span class="ident">F_SETFD</span>(<span class="ident">FD_CLOEXEC</span>))); |
| } |
| |
| <span class="kw">if</span> <span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">SOCK_NONBLOCK</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">fds</span>[<span class="number">0</span>], <span class="ident">F_SETFL</span>(<span class="ident">O_NONBLOCK</span>))); |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">fds</span>[<span class="number">1</span>], <span class="ident">F_SETFL</span>(<span class="ident">O_NONBLOCK</span>))); |
| } |
| } |
| <span class="prelude-val">Ok</span>((<span class="ident">fds</span>[<span class="number">0</span>], <span class="ident">fds</span>[<span class="number">1</span>])) |
| } |
| |
| <span class="doccomment">/// Listen for connections on a socket</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/listen.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">listen</span>(<span class="ident">sockfd</span>: <span class="ident">RawFd</span>, <span class="ident">backlog</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">ffi</span>::<span class="ident">listen</span>(<span class="ident">sockfd</span>, <span class="ident">backlog</span> <span class="kw">as</span> <span class="ident">c_int</span>) }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>).<span class="ident">map</span>(<span class="ident">drop</span>) |
| } |
| |
| <span class="doccomment">/// Bind a name to a socket</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/bind.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">bind</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">addr</span>: <span class="kw-2">&</span><span class="ident">SockAddr</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="kw">let</span> (<span class="ident">ptr</span>, <span class="ident">len</span>) <span class="op">=</span> <span class="ident">addr</span>.<span class="ident">as_ffi_pair</span>(); |
| <span class="ident">ffi</span>::<span class="ident">bind</span>(<span class="ident">fd</span>, <span class="ident">ptr</span>, <span class="ident">len</span>) |
| }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>).<span class="ident">map</span>(<span class="ident">drop</span>) |
| } |
| |
| <span class="doccomment">/// Accept a connection on a socket</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/accept.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">accept</span>(<span class="ident">sockfd</span>: <span class="ident">RawFd</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">RawFd</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">ffi</span>::<span class="ident">accept</span>(<span class="ident">sockfd</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="ident">ptr</span>::<span class="ident">null_mut</span>()) }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>) |
| } |
| |
| <span class="doccomment">/// Accept a connection on a socket</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/accept.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">accept4</span>(<span class="ident">sockfd</span>: <span class="ident">RawFd</span>, <span class="ident">flags</span>: <span class="ident">SockFlag</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">RawFd</span><span class="op">></span> { |
| <span class="ident">accept4_polyfill</span>(<span class="ident">sockfd</span>, <span class="ident">flags</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">accept4_polyfill</span>(<span class="ident">sockfd</span>: <span class="ident">RawFd</span>, <span class="ident">flags</span>: <span class="ident">SockFlag</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">RawFd</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="kw">unsafe</span> { <span class="ident">ffi</span>::<span class="ident">accept</span>(<span class="ident">sockfd</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="ident">ptr</span>::<span class="ident">null_mut</span>()) })); |
| |
| <span class="kw">if</span> <span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">SOCK_CLOEXEC</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">res</span>, <span class="ident">F_SETFD</span>(<span class="ident">FD_CLOEXEC</span>))); |
| } |
| |
| <span class="kw">if</span> <span class="ident">flags</span>.<span class="ident">contains</span>(<span class="ident">SOCK_NONBLOCK</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">fcntl</span>(<span class="ident">res</span>, <span class="ident">F_SETFL</span>(<span class="ident">O_NONBLOCK</span>))); |
| } |
| |
| <span class="prelude-val">Ok</span>(<span class="ident">res</span>) |
| } |
| |
| <span class="doccomment">/// Initiate a connection on a socket</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/connect.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">connect</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">addr</span>: <span class="kw-2">&</span><span class="ident">SockAddr</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="kw">let</span> (<span class="ident">ptr</span>, <span class="ident">len</span>) <span class="op">=</span> <span class="ident">addr</span>.<span class="ident">as_ffi_pair</span>(); |
| <span class="ident">ffi</span>::<span class="ident">connect</span>(<span class="ident">fd</span>, <span class="ident">ptr</span>, <span class="ident">len</span>) |
| }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>).<span class="ident">map</span>(<span class="ident">drop</span>) |
| } |
| |
| <span class="doccomment">/// Receive data from a connection-oriented socket. Returns the number of</span> |
| <span class="doccomment">/// bytes read</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/recv.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recv</span>(<span class="ident">sockfd</span>: <span class="ident">RawFd</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>], <span class="ident">flags</span>: <span class="ident">MsgFlags</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">ffi</span>::<span class="ident">recv</span>( |
| <span class="ident">sockfd</span>, |
| <span class="ident">buf</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span>, |
| <span class="ident">buf</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">size_t</span>, |
| <span class="ident">flags</span>.<span class="ident">bits</span>()); |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Receive data from a connectionless or connection-oriented socket. Returns</span> |
| <span class="doccomment">/// the number of bytes read and the socket address of the sender.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/recvmsg.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recvfrom</span>(<span class="ident">sockfd</span>: <span class="ident">RawFd</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="ident">SockAddr</span>)<span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="ident">addr</span>: <span class="ident">sockaddr_storage</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">zeroed</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">sockaddr_storage</span><span class="op">></span>() <span class="kw">as</span> <span class="ident">socklen_t</span>; |
| |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ffi</span>::<span class="ident">recvfrom</span>( |
| <span class="ident">sockfd</span>, |
| <span class="ident">buf</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_void</span>, |
| <span class="ident">buf</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">size_t</span>, |
| <span class="number">0</span>, |
| <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="kw-2">&</span><span class="ident">addr</span>), |
| <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">len</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">socklen_t</span>))); |
| |
| <span class="ident">sockaddr_storage_to_addr</span>(<span class="kw-2">&</span><span class="ident">addr</span>, <span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">addr</span><span class="op">|</span> (<span class="ident">ret</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">addr</span>)) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">sendto</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">buf</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">addr</span>: <span class="kw-2">&</span><span class="ident">SockAddr</span>, <span class="ident">flags</span>: <span class="ident">MsgFlags</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="kw">let</span> (<span class="ident">ptr</span>, <span class="ident">len</span>) <span class="op">=</span> <span class="ident">addr</span>.<span class="ident">as_ffi_pair</span>(); |
| <span class="ident">ffi</span>::<span class="ident">sendto</span>(<span class="ident">fd</span>, <span class="ident">buf</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_void</span>, <span class="ident">buf</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">size_t</span>, <span class="ident">flags</span>.<span class="ident">bits</span>(), <span class="ident">ptr</span>, <span class="ident">len</span>) |
| }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| |
| <span class="doccomment">/// Send data to a connection-oriented socket. Returns the number of bytes read</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/send.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">send</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">buf</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">flags</span>: <span class="ident">MsgFlags</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="ident">ffi</span>::<span class="ident">send</span>(<span class="ident">fd</span>, <span class="ident">buf</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_void</span>, <span class="ident">buf</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">size_t</span>, <span class="ident">flags</span>.<span class="ident">bits</span>()) |
| }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">linger</span> { |
| <span class="kw">pub</span> <span class="ident">l_onoff</span>: <span class="ident">c_int</span>, |
| <span class="kw">pub</span> <span class="ident">l_linger</span>: <span class="ident">c_int</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ucred</span> { |
| <span class="ident">pid</span>: <span class="ident">pid_t</span>, |
| <span class="ident">uid</span>: <span class="ident">uid_t</span>, |
| <span class="ident">gid</span>: <span class="ident">gid_t</span>, |
| } |
| |
| <span class="comment">/* |
| * |
| * ===== Socket Options ===== |
| * |
| */</span> |
| |
| <span class="doccomment">/// The protocol level at which to get / set socket options. Used as an</span> |
| <span class="doccomment">/// argument to `getsockopt` and `setsockopt`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/setsockopt.2.html)</span> |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">i32</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">SockLevel</span> { |
| <span class="ident">Socket</span> <span class="op">=</span> <span class="ident">SOL_SOCKET</span>, |
| <span class="ident">Tcp</span> <span class="op">=</span> <span class="ident">IPPROTO_TCP</span>, |
| <span class="ident">Ip</span> <span class="op">=</span> <span class="ident">IPPROTO_IP</span>, |
| <span class="ident">Ipv6</span> <span class="op">=</span> <span class="ident">IPPROTO_IPV6</span>, |
| <span class="ident">Udp</span> <span class="op">=</span> <span class="ident">IPPROTO_UDP</span>, |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>))]</span> |
| <span class="ident">Netlink</span> <span class="op">=</span> <span class="ident">SOL_NETLINK</span>, |
| } |
| |
| <span class="doccomment">/// Represents a socket option that can be accessed or set. Used as an argument</span> |
| <span class="doccomment">/// to `getsockopt`</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">GetSockOpt</span> : <span class="ident">Copy</span> { |
| <span class="kw">type</span> <span class="ident">Val</span>; |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">get</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fd</span>: <span class="ident">RawFd</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Val</span><span class="op">></span>; |
| } |
| |
| <span class="doccomment">/// Represents a socket option that can be accessed or set. Used as an argument</span> |
| <span class="doccomment">/// to `setsockopt`</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">SetSockOpt</span> : <span class="ident">Copy</span> { |
| <span class="kw">type</span> <span class="ident">Val</span>; |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">set</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">val</span>: <span class="kw-2">&</span><span class="self">Self</span>::<span class="ident">Val</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span>; |
| } |
| |
| <span class="doccomment">/// Get the current value for the requested socket option</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/getsockopt.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getsockopt</span><span class="op"><</span><span class="ident">O</span>: <span class="ident">GetSockOpt</span><span class="op">></span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">opt</span>: <span class="ident">O</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">O</span>::<span class="ident">Val</span><span class="op">></span> { |
| <span class="ident">opt</span>.<span class="ident">get</span>(<span class="ident">fd</span>) |
| } |
| |
| <span class="doccomment">/// Sets the value for the requested socket option</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/setsockopt.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">setsockopt</span><span class="op"><</span><span class="ident">O</span>: <span class="ident">SetSockOpt</span><span class="op">></span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>, <span class="ident">opt</span>: <span class="ident">O</span>, <span class="ident">val</span>: <span class="kw-2">&</span><span class="ident">O</span>::<span class="ident">Val</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="ident">opt</span>.<span class="ident">set</span>(<span class="ident">fd</span>, <span class="ident">val</span>) |
| } |
| |
| <span class="doccomment">/// Get the address of the peer connected to the socket `fd`.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/getpeername.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getpeername</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SockAddr</span><span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="ident">addr</span>: <span class="ident">sockaddr_storage</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">uninitialized</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">sockaddr_storage</span><span class="op">></span>() <span class="kw">as</span> <span class="ident">socklen_t</span>; |
| |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">ffi</span>::<span class="ident">getpeername</span>(<span class="ident">fd</span>, <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="kw-2">&</span><span class="ident">addr</span>), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">len</span>); |
| |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>)); |
| |
| <span class="ident">sockaddr_storage_to_addr</span>(<span class="kw-2">&</span><span class="ident">addr</span>, <span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Get the current address to which the socket `fd` is bound.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/getsockname.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getsockname</span>(<span class="ident">fd</span>: <span class="ident">RawFd</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SockAddr</span><span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="ident">addr</span>: <span class="ident">sockaddr_storage</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">uninitialized</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">sockaddr_storage</span><span class="op">></span>() <span class="kw">as</span> <span class="ident">socklen_t</span>; |
| |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">ffi</span>::<span class="ident">getsockname</span>(<span class="ident">fd</span>, <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="kw-2">&</span><span class="ident">addr</span>), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">len</span>); |
| |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ret</span>)); |
| |
| <span class="ident">sockaddr_storage_to_addr</span>(<span class="kw-2">&</span><span class="ident">addr</span>, <span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Return the appropriate SockAddr type from a `sockaddr_storage` of a certain</span> |
| <span class="doccomment">/// size. In C this would usually be done by casting. The `len` argument</span> |
| <span class="doccomment">/// should be the number of bytes in the sockaddr_storage that are actually</span> |
| <span class="doccomment">/// allocated and valid. It must be at least as large as all the useful parts</span> |
| <span class="doccomment">/// of the structure. Note that in the case of a `sockaddr_un`, `len` need not</span> |
| <span class="doccomment">/// include the terminating null.</span> |
| <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">sockaddr_storage_to_addr</span>( |
| <span class="ident">addr</span>: <span class="kw-2">&</span><span class="ident">sockaddr_storage</span>, |
| <span class="ident">len</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SockAddr</span><span class="op">></span> { |
| |
| <span class="kw">if</span> <span class="ident">len</span> <span class="op"><</span> <span class="ident">mem</span>::<span class="ident">size_of_val</span>(<span class="kw-2">&</span><span class="ident">addr</span>.<span class="ident">ss_family</span>) { |
| <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">Error</span>::<span class="ident">Sys</span>(<span class="ident">Errno</span>::<span class="ident">ENOTCONN</span>)); |
| } |
| |
| <span class="kw">match</span> <span class="ident">addr</span>.<span class="ident">ss_family</span> <span class="kw">as</span> <span class="ident">c_int</span> { |
| <span class="ident">consts</span>::<span class="ident">AF_INET</span> <span class="op">=></span> { |
| <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">==</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">sockaddr_in</span><span class="op">></span>()); |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw-2">*</span>(<span class="ident">addr</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">sockaddr_in</span>); |
| <span class="prelude-val">Ok</span>(<span class="ident">SockAddr</span>::<span class="ident">Inet</span>(<span class="ident">InetAddr</span>::<span class="ident">V4</span>(<span class="ident">ret</span>))) |
| } |
| <span class="ident">consts</span>::<span class="ident">AF_INET6</span> <span class="op">=></span> { |
| <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">==</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">sockaddr_in6</span><span class="op">></span>()); |
| <span class="prelude-val">Ok</span>(<span class="ident">SockAddr</span>::<span class="ident">Inet</span>(<span class="ident">InetAddr</span>::<span class="ident">V6</span>((<span class="kw-2">*</span>(<span class="ident">addr</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">sockaddr_in6</span>))))) |
| } |
| <span class="ident">consts</span>::<span class="ident">AF_UNIX</span> <span class="op">=></span> { |
| <span class="kw">let</span> <span class="ident">sun</span> <span class="op">=</span> <span class="kw-2">*</span>(<span class="ident">addr</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">sockaddr_un</span>); |
| <span class="kw">let</span> <span class="ident">pathlen</span> <span class="op">=</span> <span class="ident">len</span> <span class="op">-</span> <span class="macro">offset_of</span><span class="macro">!</span>(<span class="ident">sockaddr_un</span>, <span class="ident">sun_path</span>); |
| <span class="prelude-val">Ok</span>(<span class="ident">SockAddr</span>::<span class="ident">Unix</span>(<span class="ident">UnixAddr</span>(<span class="ident">sun</span>, <span class="ident">pathlen</span>))) |
| } |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>))]</span> |
| <span class="ident">consts</span>::<span class="ident">AF_NETLINK</span> <span class="op">=></span> { |
| <span class="kw">use</span> <span class="ident">libc</span>::<span class="ident">sockaddr_nl</span>; |
| <span class="prelude-val">Ok</span>(<span class="ident">SockAddr</span>::<span class="ident">Netlink</span>(<span class="ident">NetlinkAddr</span>(<span class="kw-2">*</span>(<span class="ident">addr</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">sockaddr_nl</span>)))) |
| } |
| <span class="ident">af</span> <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"unexpected address family {}"</span>, <span class="ident">af</span>), |
| } |
| } |
| |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Shutdown</span> { |
| <span class="doccomment">/// Further receptions will be disallowed.</span> |
| <span class="ident">Read</span>, |
| <span class="doccomment">/// Further transmissions will be disallowed.</span> |
| <span class="ident">Write</span>, |
| <span class="doccomment">/// Further receptions and transmissions will be disallowed.</span> |
| <span class="ident">Both</span>, |
| } |
| |
| <span class="doccomment">/// Shut down part of a full-duplex connection.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [Further reading](http://man7.org/linux/man-pages/man2/shutdown.2.html)</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">shutdown</span>(<span class="ident">df</span>: <span class="ident">RawFd</span>, <span class="ident">how</span>: <span class="ident">Shutdown</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="kw">use</span> <span class="ident">libc</span>::<span class="ident">shutdown</span>; |
| |
| <span class="kw">let</span> <span class="ident">how</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">how</span> { |
| <span class="ident">Shutdown</span>::<span class="ident">Read</span> <span class="op">=></span> <span class="ident">consts</span>::<span class="ident">SHUT_RD</span>, |
| <span class="ident">Shutdown</span>::<span class="ident">Write</span> <span class="op">=></span> <span class="ident">consts</span>::<span class="ident">SHUT_WR</span>, |
| <span class="ident">Shutdown</span>::<span class="ident">Both</span> <span class="op">=></span> <span class="ident">consts</span>::<span class="ident">SHUT_RDWR</span>, |
| }; |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">shutdown</span>(<span class="ident">df</span>, <span class="ident">how</span>)).<span class="ident">map</span>(<span class="ident">drop</span>) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">test_struct_sizes</span>() { |
| <span class="kw">use</span> <span class="ident">nixtest</span>; |
| <span class="ident">nixtest</span>::<span class="ident">assert_size_of</span>::<span class="op"><</span><span class="ident">sockaddr_storage</span><span class="op">></span>(<span class="string">"sockaddr_storage"</span>); |
| } |
| </pre> |
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