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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> </pre><pre class='rust '> <span class='doccomment'>//! The module contains the implementation of HTTP/2 frames.</span> <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>mem</span>; <span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>StreamId</span>; <span class='doccomment'>/// A helper macro that unpacks a sequence of 4 bytes found in the buffer with</span> <span class='doccomment'>/// the given identifier, starting at the given offset, into the given integer</span> <span class='doccomment'>/// type. Obviously, the integer type should be able to support at least 4</span> <span class='doccomment'>/// bytes.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Examples</span> <span class='doccomment'>///</span> <span class='doccomment'>/// ```rust</span> <span class='doccomment'>/// let buf: [u8; 4] = [0, 0, 0, 1];</span> <span class='doccomment'>/// assert_eq!(1u32, unpack_octets_4!(buf, 0, u32));</span> <span class='doccomment'>/// ```</span> <span class='attribute'>#[<span class='ident'>macro_escape</span>]</span> <span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>unpack_octets_4</span> { (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>:<span class='ident'>ty</span>) <span class='op'>=></span> ( ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>0</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'><<</span> <span class='number'>24</span>) <span class='op'>|</span> ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>1</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'><<</span> <span class='number'>16</span>) <span class='op'>|</span> ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>2</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'><<</span> <span class='number'>8</span>) <span class='op'>|</span> ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>3</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'><<</span> <span class='number'>0</span>) ); } <span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>data</span>; <span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>headers</span>; <span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>settings</span>; <span class='doccomment'>/// Rexports related to the `DATA` frame.</span> <span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>data</span>::{<span class='ident'>DataFlag</span>, <span class='ident'>DataFrame</span>}; <span class='doccomment'>/// Rexports related to the `HEADERS` frame.</span> <span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>headers</span>::{<span class='ident'>HeadersFlag</span>, <span class='ident'>HeadersFrame</span>}; <span class='doccomment'>/// Rexports related to the `SETTINGS` frame.</span> <span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>settings</span>::{<span class='ident'>SettingsFlag</span>, <span class='ident'>SettingsFrame</span>, <span class='ident'>HttpSetting</span>}; <span class='doccomment'>/// An alias for the 9-byte buffer that each HTTP/2 frame header must be stored</span> <span class='doccomment'>/// in.</span> <span class='kw'>pub</span> <span class='kw'>type</span> <span class='ident'>FrameHeaderBuffer</span> <span class='op'>=</span> [<span class='ident'>u8</span>; <span class='number'>9</span>]; <span class='doccomment'>/// An alias for the 4-tuple representing the components of each HTTP/2 frame</span> <span class='doccomment'>/// header.</span> <span class='kw'>pub</span> <span class='kw'>type</span> <span class='ident'>FrameHeader</span> <span class='op'>=</span> (<span class='ident'>u32</span>, <span class='ident'>u8</span>, <span class='ident'>u8</span>, <span class='ident'>u32</span>); <span class='doccomment'>/// Deconstructs a `FrameHeader` into its corresponding 4 components,</span> <span class='doccomment'>/// represented as a 4-tuple: `(length, frame_type, flags, stream_id)`.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// The frame `type` and `flags` components are returned as their original</span> <span class='doccomment'>/// octet representation, rather than reinterpreted.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>unpack_header</span>(<span class='ident'>header</span>: <span class='kw-2'>&</span><span class='ident'>FrameHeaderBuffer</span>) <span class='op'>-></span> <span class='ident'>FrameHeader</span> { <span class='kw'>let</span> <span class='ident'>length</span>: <span class='ident'>u32</span> <span class='op'>=</span> ((<span class='ident'>header</span>[<span class='number'>0</span>] <span class='kw'>as</span> <span class='ident'>u32</span>) <span class='op'><<</span> <span class='number'>16</span>) <span class='op'>|</span> ((<span class='ident'>header</span>[<span class='number'>1</span>] <span class='kw'>as</span> <span class='ident'>u32</span>) <span class='op'><<</span> <span class='number'>8</span>) <span class='op'>|</span> ((<span class='ident'>header</span>[<span class='number'>2</span>] <span class='kw'>as</span> <span class='ident'>u32</span>) <span class='op'><<</span> <span class='number'>0</span>); <span class='kw'>let</span> <span class='ident'>frame_type</span> <span class='op'>=</span> <span class='ident'>header</span>[<span class='number'>3</span>]; <span class='kw'>let</span> <span class='ident'>flags</span> <span class='op'>=</span> <span class='ident'>header</span>[<span class='number'>4</span>]; <span class='kw'>let</span> <span class='ident'>stream_id</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='macro'>unpack_octets_4</span><span class='macro'>!</span>(<span class='ident'>header</span>, <span class='number'>5</span>, <span class='ident'>u32</span>); (<span class='ident'>length</span>, <span class='ident'>frame_type</span>, <span class='ident'>flags</span>, <span class='ident'>stream_id</span>) } <span class='doccomment'>/// Constructs a buffer of 9 bytes that represents the given `FrameHeader`.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>pack_header</span>(<span class='ident'>header</span>: <span class='kw-2'>&</span><span class='ident'>FrameHeader</span>) <span class='op'>-></span> <span class='ident'>FrameHeaderBuffer</span> { <span class='kw'>let</span> <span class='kw-2'>&</span>(<span class='ident'>length</span>, <span class='ident'>frame_type</span>, <span class='ident'>flags</span>, <span class='ident'>stream_id</span>) <span class='op'>=</span> <span class='ident'>header</span>; [ (((<span class='ident'>length</span> <span class='op'>>></span> <span class='number'>16</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='ident'>length</span> <span class='op'>>></span> <span class='number'>8</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='ident'>length</span> <span class='op'>>></span> <span class='number'>0</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), <span class='ident'>frame_type</span>, <span class='ident'>flags</span>, (((<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>24</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>16</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>8</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), (((<span class='ident'>stream_id</span> <span class='op'>>></span> <span class='number'>0</span>) <span class='kw-2'>&</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>), ] } <span class='doccomment'>/// A helper function that parses the given payload, considering it padded.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// This means that the first byte is the length of the padding with that many</span> <span class='doccomment'>/// 0 bytes expected to follow the actual payload.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Returns</span> <span class='doccomment'>///</span> <span class='doccomment'>/// A slice of the given payload where the actual one is found and the length</span> <span class='doccomment'>/// of the padding.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// If the padded payload is invalid (e.g. the length of the padding is equal</span> <span class='doccomment'>/// to the total length), returns `None`.</span> <span class='kw'>fn</span> <span class='ident'>parse_padded_payload</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='ident'>payload</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> [<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> [<span class='ident'>u8</span>], <span class='ident'>u8</span>)<span class='op'>></span> { <span class='kw'>if</span> <span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> { <span class='comment'>// We make sure not to index the payload before we're sure how</span> <span class='comment'>// large the buffer is.</span> <span class='comment'>// If this is the case, the frame is invalid as no padding</span> <span class='comment'>// length can be extracted, even though the frame should be</span> <span class='comment'>// padded.</span> <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='kw'>let</span> <span class='ident'>pad_len</span> <span class='op'>=</span> <span class='ident'>payload</span>[<span class='number'>0</span>] <span class='kw'>as</span> <span class='ident'>usize</span>; <span class='kw'>if</span> <span class='ident'>pad_len</span> <span class='op'>>=</span> <span class='ident'>payload</span>.<span class='ident'>len</span>() { <span class='comment'>// This is invalid: the padding length MUST be less than the</span> <span class='comment'>// total frame size.</span> <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='prelude-val'>Some</span>((<span class='kw-2'>&</span><span class='ident'>payload</span>[<span class='number'>1</span>..<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='ident'>pad_len</span>], <span class='ident'>pad_len</span> <span class='kw'>as</span> <span class='ident'>u8</span>)) } <span class='doccomment'>/// A trait that all HTTP/2 frame header flags need to implement.</span> <span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Flag</span> { <span class='doccomment'>/// Returns a bit mask that represents the flag.</span> <span class='kw'>fn</span> <span class='ident'>bitmask</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>u8</span>; } <span class='doccomment'>/// A trait that all HTTP/2 frame structs need to implement.</span> <span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Frame</span>: <span class='ident'>Sized</span> { <span class='doccomment'>/// The type that represents the flags that the particular `Frame` can take.</span> <span class='doccomment'>/// This makes sure that only valid `Flag`s are used with each `Frame`.</span> <span class='kw'>type</span> <span class='ident'>FlagType</span>: <span class='ident'>Flag</span>; <span class='doccomment'>/// Creates a new `Frame` from the given `RawFrame` (i.e. header and</span> <span class='doccomment'>/// payload), if possible.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Returns</span> <span class='doccomment'>///</span> <span class='doccomment'>/// `None` if a valid `Frame` cannot be constructed from the given</span> <span class='doccomment'>/// `RawFrame`. Some reasons why this may happen is a wrong frame type in</span> <span class='doccomment'>/// the header, a body that cannot be decoded according to the particular</span> <span class='doccomment'>/// frame's rules, etc.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// Otherwise, returns a newly constructed `Frame`.</span> <span class='kw'>fn</span> <span class='ident'>from_raw</span>(<span class='ident'>raw_frame</span>: <span class='ident'>RawFrame</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span>; <span class='doccomment'>/// Tests if the given flag is set for the frame.</span> <span class='kw'>fn</span> <span class='ident'>is_set</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>flag</span>: <span class='self'>Self</span>::<span class='ident'>FlagType</span>) <span class='op'>-></span> <span class='ident'>bool</span>; <span class='doccomment'>/// Returns the `StreamId` of the stream to which the frame is associated</span> <span class='kw'>fn</span> <span class='ident'>get_stream_id</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>StreamId</span>; <span class='doccomment'>/// Returns a `FrameHeader` based on the current state of the `Frame`.</span> <span class='kw'>fn</span> <span class='ident'>get_header</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>FrameHeader</span>; <span class='doccomment'>/// Sets the given flag for the frame.</span> <span class='kw'>fn</span> <span class='ident'>set_flag</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>flag</span>: <span class='self'>Self</span>::<span class='ident'>FlagType</span>); <span class='doccomment'>/// Returns a `Vec` with the serialized representation of the frame.</span> <span class='kw'>fn</span> <span class='ident'>serialize</span>(<span class='kw-2'>&</span><span class='self'>self</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='doccomment'>/// A struct that defines the format of the raw HTTP/2 frame, i.e. the frame</span> <span class='doccomment'>/// as it is read from the wire.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// This format is defined in section 4.1. of the HTTP/2 spec.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// The `RawFrame` struct simply stores the raw components of an HTTP/2 frame:</span> <span class='doccomment'>/// its header and the payload as a sequence of bytes.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// It does not try to interpret the payload bytes, nor do any validation in</span> <span class='doccomment'>/// terms of its validity based on the frame type given in the header.</span> <span class='doccomment'>/// It is simply a wrapper around the two parts of an HTTP/2 frame.</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>PartialEq</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span> <span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>RawFrame</span> { <span class='doccomment'>/// The raw frame representation, including both the raw header representation</span> <span class='doccomment'>/// (in the first 9 bytes), followed by the raw payload representation.</span> <span class='ident'>raw_content</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>, } <span class='kw'>impl</span> <span class='ident'>RawFrame</span> { <span class='doccomment'>/// Creates a new `RawFrame` with the given `FrameHeader`. The payload is</span> <span class='doccomment'>/// left empty.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>header</span>: <span class='ident'>FrameHeader</span>) <span class='op'>-></span> <span class='ident'>RawFrame</span> { <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>Vec</span>::<span class='ident'>new</span>()) } <span class='doccomment'>/// Creates a new `RawFrame` with the given header and payload.</span> <span class='doccomment'>/// Does not do any validation to determine whether the frame is in a correct</span> <span class='doccomment'>/// state as constructed.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_payload</span>(<span class='ident'>header</span>: <span class='ident'>FrameHeader</span>, <span class='ident'>payload</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>RawFrame</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>raw</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>into_iter</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='op'>*</span><span class='ident'>x</span>)); <span class='ident'>raw</span>.<span class='ident'>extend</span>(<span class='ident'>payload</span>); <span class='ident'>RawFrame</span> { <span class='ident'>raw_content</span>: <span class='ident'>raw</span>, } } <span class='doccomment'>/// Creates a new `RawFrame` by parsing the given buffer.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// # Returns</span> <span class='doccomment'>///</span> <span class='doccomment'>/// A `RawFrame` instance constructed from the given buffer.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// If the buffer cannot be parsed into a frame, which includes the payload</span> <span class='doccomment'>/// section having a different length than what was found in the header,</span> <span class='doccomment'>/// `None` is returned.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>from_buf</span>(<span class='ident'>buf</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>RawFrame</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='number'>9</span> { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> <span class='ident'>unpack_header</span>(<span class='kw'>unsafe</span> { <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>buf</span>.<span class='ident'>len</span>() <span class='op'>>=</span> <span class='number'>9</span>); <span class='comment'>// We just asserted that this transmute is safe.</span> <span class='ident'>mem</span>::<span class='ident'>transmute</span>(<span class='ident'>buf</span>.<span class='ident'>as_ptr</span>()) }); <span class='kw'>let</span> <span class='ident'>payload_len</span> <span class='op'>=</span> <span class='ident'>header</span>.<span class='number'>0</span> <span class='kw'>as</span> <span class='ident'>usize</span>; <span class='kw'>if</span> <span class='ident'>buf</span>[<span class='number'>9</span>..].<span class='ident'>len</span>() <span class='op'>!=</span> <span class='ident'>payload_len</span> { <span class='kw'>return</span> <span class='prelude-val'>None</span>; } <span class='prelude-val'>Some</span>(<span class='ident'>RawFrame</span> { <span class='ident'>raw_content</span>: <span class='ident'>buf</span>.<span class='ident'>to_vec</span>(), }) } <span class='doccomment'>/// Returns a `Vec` of bytes representing the serialized (on-the-wire)</span> <span class='doccomment'>/// representation of this raw frame.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>serialize</span>(<span class='kw-2'>&</span><span class='self'>self</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='self'>self</span>.<span class='ident'>raw_content</span>.<span class='ident'>clone</span>() } <span class='doccomment'>/// Returns a `FrameHeader` instance corresponding to the headers of the</span> <span class='doccomment'>/// `RawFrame`.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>header</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>FrameHeader</span> { <span class='ident'>unpack_header</span>(<span class='kw'>unsafe</span> { <span class='macro'>assert</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>raw_content</span>.<span class='ident'>len</span>() <span class='op'>>=</span> <span class='number'>9</span>); <span class='comment'>// We just asserted that this transmute is safe.</span> <span class='ident'>mem</span>::<span class='ident'>transmute</span>(<span class='self'>self</span>.<span class='ident'>raw_content</span>.<span class='ident'>as_ptr</span>()) }) } <span class='doccomment'>/// Returns a slice representing the payload of the `RawFrame`.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>payload</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span>[<span class='ident'>u8</span>] { <span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>raw_content</span>[<span class='number'>9</span>..] } } <span class='doccomment'>/// Provide a conversion into a `Vec`.</span> <span class='kw'>impl</span> <span class='ident'>Into</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='kw'>for</span> <span class='ident'>RawFrame</span> { <span class='kw'>fn</span> <span class='ident'>into</span>(<span class='self'>self</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='self'>self</span>.<span class='ident'>raw_content</span> } } <span class='doccomment'>/// Provide a conversion from a `Vec`.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// This conversion is unchecked and could cause the resulting `RawFrame` to be an</span> <span class='doccomment'>/// invalid HTTP/2 frame.</span> <span class='kw'>impl</span> <span class='ident'>From</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='kw'>for</span> <span class='ident'>RawFrame</span> { <span class='kw'>fn</span> <span class='ident'>from</span>(<span class='ident'>raw</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>RawFrame</span> { <span class='ident'>RawFrame</span> { <span class='ident'>raw_content</span>: <span class='ident'>raw</span> } } } <span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> <span class='kw'>mod</span> <span class='ident'>tests</span> { <span class='kw'>use</span> <span class='kw'>super</span>::{ <span class='ident'>unpack_header</span>, <span class='ident'>pack_header</span>, <span class='ident'>RawFrame</span>, <span class='ident'>FrameHeader</span>, <span class='ident'>Frame</span>, }; <span class='doccomment'>/// Tests that the `unpack_header` function correctly returns the</span> <span class='doccomment'>/// components of HTTP/2 frame headers.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_unpack_header</span>() { { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>9</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>4</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>256</span> <span class='op'>*</span> <span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(((<span class='number'>1</span> <span class='op'><<</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>( ((<span class='number'>1</span> <span class='op'><<</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span> <span class='op'>+</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>8</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>16</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>24</span>)), <span class='ident'>unpack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)); } } <span class='doccomment'>/// Tests that the `pack_header` function correctly returns the buffer</span> <span class='doccomment'>/// corresponding to components of HTTP/2 frame headers.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_pack_header</span>() { { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>9</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>4</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>256</span> <span class='op'>*</span> <span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>(<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>]; <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span>((<span class='number'>1</span> <span class='op'><<</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>)), <span class='ident'>header</span>); } { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>]; <span class='kw'>let</span> <span class='ident'>header_components</span> <span class='op'>=</span> ( (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span> <span class='op'>+</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>8</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>16</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>24</span>) ); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header_components</span>), <span class='ident'>header</span>); } } <span class='doccomment'>/// Builds a test frame of the given type with the given header and</span> <span class='doccomment'>/// payload, by using the `Frame::from_raw` method.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>build_test_frame</span><span class='op'><</span><span class='ident'>F</span>: <span class='ident'>Frame</span><span class='op'>></span>(<span class='ident'>header</span>: <span class='kw-2'>&</span><span class='ident'>FrameHeader</span>, <span class='ident'>payload</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>F</span> { <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>.<span class='ident'>clone</span>(), <span class='ident'>payload</span>.<span class='ident'>to_vec</span>()); <span class='ident'>Frame</span>::<span class='ident'>from_raw</span>(<span class='ident'>raw</span>).<span class='ident'>unwrap</span>() } <span class='doccomment'>/// Builds a `Vec` containing the given data as a padded HTTP/2 frame.</span> <span class='doccomment'>///</span> <span class='doccomment'>/// It first places the length of the padding, followed by the data,</span> <span class='doccomment'>/// followed by `pad_len` zero bytes.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>build_padded_frame_payload</span>(<span class='ident'>data</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>pad_len</span>: <span class='ident'>u8</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='kw'>let</span> <span class='ident'>sz</span> <span class='op'>=</span> <span class='number'>1</span> <span class='op'>+</span> <span class='ident'>data</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='ident'>pad_len</span> <span class='kw'>as</span> <span class='ident'>usize</span>; <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>payload</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>with_capacity</span>(<span class='ident'>sz</span>); <span class='ident'>payload</span>.<span class='ident'>push</span>(<span class='ident'>pad_len</span>); <span class='ident'>payload</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='kw'>for</span> _ <span class='kw'>in</span> <span class='number'>0</span>..<span class='ident'>pad_len</span> { <span class='ident'>payload</span>.<span class='ident'>push</span>(<span class='number'>0</span>); } <span class='ident'>payload</span> } <span class='doccomment'>/// Tests that the `RawFrame::with_payload` method correctly constructs a</span> <span class='doccomment'>/// `RawFrame` from the given parts.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_raw_frame_with_payload</span>() { <span class='comment'>// Correct frame</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>data</span>.<span class='ident'>to_vec</span>()); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>) } <span class='comment'>// Correct frame with trailing data</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123456"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>3</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>data</span>.<span class='ident'>to_vec</span>()); <span class='comment'>// No validation of whether the parts form a correct frame</span> <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>) } <span class='comment'>// Missing payload chunk</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>6</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>data</span>.<span class='ident'>to_vec</span>()); <span class='comment'>// No validation of whether the parts form a correct frame</span> <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>) } } <span class='doccomment'>/// Tests that the `RawFrame::from_buf` method correctly constructs a</span> <span class='doccomment'>/// `RawFrame` from a given buffer.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_raw_frame_from_buffer</span>() { <span class='comment'>// Correct frame</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>).<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>) } <span class='comment'>// Correct frame with trailing data</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>, <span class='number'>5</span>].<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>).<span class='ident'>is_none</span>()); } <span class='comment'>// Missing payload chunk</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>[..<span class='number'>2</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>).<span class='ident'>is_none</span>()); } <span class='comment'>// Missing header chunk</span> { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>0</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)[..<span class='number'>5</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>).<span class='ident'>is_none</span>()); } <span class='comment'>// Completely empty buffer</span> { <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span>[]).<span class='ident'>is_none</span>()); } } <span class='doccomment'>/// Tests that constructing a `RawFrame` from a `Vec<u8>` by using the `From<Vec<u8>>`</span> <span class='doccomment'>/// trait implementation works as expected.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_raw_frame_from_vec_buffer_unchecked</span>() { <span class='comment'>// Correct frame</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>(); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>); } <span class='comment'>// Correct frame with trailing data</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='string'>b"12345"</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>(); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='string'>b"12312345"</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>); } <span class='comment'>// Missing payload chunk</span> { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>[..<span class='number'>2</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>(); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='string'>b"12"</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>); } <span class='comment'>// Missing header chunk</span> { <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>0</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>)[..<span class='number'>5</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>(); <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>); } <span class='comment'>// Completely empty buffer</span> { <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='macro'>vec</span><span class='macro'>!</span>[]).<span class='ident'>serialize</span>(), <span class='kw-2'>&</span>[]); } } <span class='doccomment'>/// Tests that the `RawFrame::serialize` method correctly serializes a</span> <span class='doccomment'>/// `RawFrame`.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_raw_frame_serialize</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>).<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf</span>); } <span class='doccomment'>/// Tests that converting a `RawFrame` into a `Vec` works correctly.</span> <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_raw_frame_into_vec</span>() { <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b"123"</span>; <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>); <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> { <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>(); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>()); <span class='ident'>buf</span> }; <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&</span><span class='ident'>buf</span>).<span class='ident'>unwrap</span>(); <span class='kw'>let</span> <span class='ident'>serialized</span> <span class='op'>=</span> <span class='ident'>raw</span>.<span class='ident'>serialize</span>(); <span class='kw'>let</span> <span class='ident'>vec</span>: <span class='ident'>Vec</span><span class='op'><</span>_<span class='op'>></span> <span class='op'>=</span> <span class='ident'>raw</span>.<span class='ident'>into</span>(); <span class='comment'>// The vector is equivalent to the original buffer?</span> <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>vec</span>, <span class='ident'>buf</span>); <span class='comment'>// The vector and the serialized representation are also equivalent</span> <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>vec</span>, <span class='ident'>serialized</span>); } } </pre> </section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt>?</dt> <dd>Show this help dialog</dd> <dt>S</dt> <dd>Focus the search field</dd> <dt>⇤</dt> <dd>Move up in search results</dd> <dt>⇥</dt> <dd>Move down in search results</dd> <dt>⏎</dt> <dd>Go to active search result</dd> <dt>+</dt> <dd>Collapse/expand all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../../../"; 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