1442 lines
172 KiB
HTML
1442 lines
172 KiB
HTML
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<div class="section" id="tutorial-http-2-0-server">
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<h1>Tutorial: HTTP/2.0 server<a class="headerlink" href="#tutorial-http-2-0-server" title="Permalink to this headline">¶</a></h1>
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<p>In this tutorial, we are going to write single-threaded, event-based
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HTTP/2.0 web server, which supports HTTPS. It can handle concurrent
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multiple requests, but only GET method is supported. The complete
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source code, <a class="reference internal" href="#libevent-server-c">libevent-server.c</a>, is attached at the end of this
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page. It also resides in examples directory in the archive or
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repository.</p>
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<p>This simple server takes 3 arguments, a port number to listen to, a
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path to SSL/TLS private key file and certificate file. Its synopsis
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is like this:</p>
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<div class="highlight-c"><pre>$ libevent-server PORT /path/to/server.key /path/to/server.crt</pre>
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</div>
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<p>We use libevent in this tutorial to handle networking I/O. Please
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note that nghttp2 iteself does not depends on libevent.</p>
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<p>First we do some setup routine for libevent and OpenSSL library in
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function <tt class="docutils literal"><span class="pre">main()</span></tt> and <tt class="docutils literal"><span class="pre">run()</span></tt>, which is not so relevant to nghttp2
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library use. The one thing you should look at is setup NPN callback.
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The NPN callback is used for the server to advertise the application
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protocols the server supports to a client. In this example program,
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when creating SSL_CTX object, we stores the application protocol name
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in the wire format of NPN in statically allocated buffer. This is safe
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because we only create 1 SSL_CTX object in the entire program life
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time:</p>
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<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">unsigned</span> <span class="kt">char</span> <span class="n">next_proto_list</span><span class="p">[</span><span class="mi">256</span><span class="p">];</span>
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<span class="k">static</span> <span class="kt">size_t</span> <span class="n">next_proto_list_len</span><span class="p">;</span>
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<span class="k">static</span> <span class="kt">int</span> <span class="nf">next_proto_cb</span><span class="p">(</span><span class="n">SSL</span> <span class="o">*</span><span class="n">s</span><span class="p">,</span> <span class="k">const</span> <span class="kt">unsigned</span> <span class="kt">char</span> <span class="o">**</span><span class="n">data</span><span class="p">,</span> <span class="kt">unsigned</span> <span class="kt">int</span> <span class="o">*</span><span class="n">len</span><span class="p">,</span>
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<span class="kt">void</span> <span class="o">*</span><span class="n">arg</span><span class="p">)</span>
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<span class="p">{</span>
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<span class="o">*</span><span class="n">data</span> <span class="o">=</span> <span class="n">next_proto_list</span><span class="p">;</span>
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<span class="o">*</span><span class="n">len</span> <span class="o">=</span> <span class="n">next_proto_list_len</span><span class="p">;</span>
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<span class="k">return</span> <span class="n">SSL_TLSEXT_ERR_OK</span><span class="p">;</span>
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<span class="p">}</span>
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<span class="k">static</span> <span class="n">SSL_CTX</span><span class="o">*</span> <span class="nf">create_ssl_ctx</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">key_file</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">cert_file</span><span class="p">)</span>
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<span class="p">{</span>
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<span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">;</span>
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<span class="n">ssl_ctx</span> <span class="o">=</span> <span class="n">SSL_CTX_new</span><span class="p">(</span><span class="n">SSLv23_server_method</span><span class="p">());</span>
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<span class="p">...</span>
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<span class="n">next_proto_list</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="n">NGHTTP2_PROTO_VERSION_ID_LEN</span><span class="p">;</span>
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<span class="n">memcpy</span><span class="p">(</span><span class="o">&</span><span class="n">next_proto_list</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">NGHTTP2_PROTO_VERSION_ID</span><span class="p">,</span>
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<span class="n">NGHTTP2_PROTO_VERSION_ID_LEN</span><span class="p">);</span>
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<span class="n">next_proto_list_len</span> <span class="o">=</span> <span class="mi">1</span> <span class="o">+</span> <span class="n">NGHTTP2_PROTO_VERSION_ID_LEN</span><span class="p">;</span>
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<span class="n">SSL_CTX_set_next_protos_advertised_cb</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">,</span> <span class="n">next_proto_cb</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
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<span class="k">return</span> <span class="n">ssl_ctx</span><span class="p">;</span>
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<span class="p">}</span>
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</pre></div>
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</div>
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<p>The wire format of NPN is array of length prefixed string. The exactly
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one byte is used to specify the length of the protocol identifier. In
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this tutorial, we advertise the HTTP/2.0 protocol the nghttp2 library
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supports. We export its identifier in
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<a class="reference internal" href="apiref.html#NGHTTP2_PROTO_VERSION_ID" title="NGHTTP2_PROTO_VERSION_ID"><tt class="xref c c-macro docutils literal"><span class="pre">NGHTTP2_PROTO_VERSION_ID</span></tt></a>. The <tt class="docutils literal"><span class="pre">next_proto_cb()</span></tt> function is
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the server-side NPN callback. In OpenSSL implementation, We just
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assign the pointer to the NPN buffers we filled earlier. The NPN
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callback function is set to SSL_CTX object using
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<tt class="docutils literal"><span class="pre">SSL_CTX_set_next_protos_advertised_cb()</span></tt>.</p>
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<p>We use <tt class="docutils literal"><span class="pre">app_content</span></tt> structure to store the application-wide data:</p>
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<div class="highlight-c"><div class="highlight"><pre><span class="k">struct</span> <span class="n">app_context</span> <span class="p">{</span>
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<span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">;</span>
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<span class="k">struct</span> <span class="n">event_base</span> <span class="o">*</span><span class="n">evbase</span><span class="p">;</span>
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<span class="p">};</span>
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</pre></div>
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</div>
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<p>We use <tt class="docutils literal"><span class="pre">http2_session_data</span></tt> structure to store the session-level
|
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(which corresponds to 1 HTTP/2.0 connection) data:</p>
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<div class="highlight-c"><div class="highlight"><pre><span class="k">typedef</span> <span class="k">struct</span> <span class="n">http2_session_data</span> <span class="p">{</span>
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<span class="k">struct</span> <span class="n">http2_stream_data</span> <span class="n">root</span><span class="p">;</span>
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<span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">;</span>
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<span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span><span class="p">;</span>
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||
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<span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">;</span>
|
||
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<span class="kt">char</span> <span class="o">*</span><span class="n">client_addr</span><span class="p">;</span>
|
||
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<span class="kt">size_t</span> <span class="n">handshake_leftlen</span><span class="p">;</span>
|
||
|
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<span class="p">}</span> <span class="n">http2_session_data</span><span class="p">;</span>
|
||
|
|
</pre></div>
|
||
|
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</div>
|
||
|
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<p>We use <tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> structure to store the stream-level
|
||
|
|
data:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">typedef</span> <span class="k">struct</span> <span class="n">http2_stream_data</span> <span class="p">{</span>
|
||
|
|
<span class="k">struct</span> <span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">prev</span><span class="p">,</span> <span class="o">*</span><span class="n">next</span><span class="p">;</span>
|
||
|
|
<span class="kt">char</span> <span class="o">*</span><span class="n">request_path</span><span class="p">;</span>
|
||
|
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<span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">;</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span> <span class="n">http2_stream_data</span><span class="p">;</span>
|
||
|
|
</pre></div>
|
||
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</div>
|
||
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<p>1 HTTP/2.0 session can have multiple streams. We manage these
|
||
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multiple streams by intrusive doubly linked list to add and remove the
|
||
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object in O(1). The first element of this list is pointed by the
|
||
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<tt class="docutils literal"><span class="pre">root->next</span></tt> in <tt class="docutils literal"><span class="pre">http2_session_data</span></tt>. Initially, <tt class="docutils literal"><span class="pre">root->next</span></tt>
|
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is <tt class="docutils literal"><span class="pre">NULL</span></tt>. The <tt class="docutils literal"><span class="pre">handshake_leftlen</span></tt> member of
|
||
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<tt class="docutils literal"><span class="pre">http2_session_data</span></tt> is used to track the number of bytes remaining
|
||
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when receiving first 24 bytes magic values from the client. We use
|
||
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libevent’s bufferevent structure to perform network I/O. Notice that
|
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bufferevent object is in <tt class="docutils literal"><span class="pre">http2_session_data</span></tt> and not in
|
||
|
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<tt class="docutils literal"><span class="pre">http2_stream_data</span></tt>. This is because <tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> is just a
|
||
|
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logical stream multiplexed over the single connection managed by
|
||
|
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bufferevent in <tt class="docutils literal"><span class="pre">http2_session_data</span></tt>.</p>
|
||
|
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<p>We first create listener object to accept incoming connections.
|
||
|
|
We use libevent’s <tt class="docutils literal"><span class="pre">struct</span> <span class="pre">evconnlistener</span></tt> for this purpose:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">start_listen</span><span class="p">(</span><span class="k">struct</span> <span class="n">event_base</span> <span class="o">*</span><span class="n">evbase</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">service</span><span class="p">,</span>
|
||
|
|
<span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">addrinfo</span> <span class="n">hints</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">addrinfo</span> <span class="o">*</span><span class="n">res</span><span class="p">,</span> <span class="o">*</span><span class="n">rp</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">memset</span><span class="p">(</span><span class="o">&</span><span class="n">hints</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">hints</span><span class="p">));</span>
|
||
|
|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_family</span> <span class="o">=</span> <span class="n">AF_UNSPEC</span><span class="p">;</span>
|
||
|
|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_socktype</span> <span class="o">=</span> <span class="n">SOCK_STREAM</span><span class="p">;</span>
|
||
|
|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_flags</span> <span class="o">=</span> <span class="n">AI_PASSIVE</span><span class="p">;</span>
|
||
|
|
<span class="cp">#ifdef AI_ADDRCONFIG</span>
|
||
|
|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_flags</span> <span class="o">|=</span> <span class="n">AI_ADDRCONFIG</span><span class="p">;</span>
|
||
|
|
<span class="cp">#endif </span><span class="c1">// AI_ADDRCONFIG</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">getaddrinfo</span><span class="p">(</span><span class="nb">NULL</span><span class="p">,</span> <span class="n">service</span><span class="p">,</span> <span class="o">&</span><span class="n">hints</span><span class="p">,</span> <span class="o">&</span><span class="n">res</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">rp</span> <span class="o">=</span> <span class="n">res</span><span class="p">;</span> <span class="n">rp</span><span class="p">;</span> <span class="n">rp</span> <span class="o">=</span> <span class="n">rp</span><span class="o">-></span><span class="n">ai_next</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">struct</span> <span class="n">evconnlistener</span> <span class="o">*</span><span class="n">listener</span><span class="p">;</span>
|
||
|
|
<span class="n">listener</span> <span class="o">=</span> <span class="n">evconnlistener_new_bind</span><span class="p">(</span><span class="n">evbase</span><span class="p">,</span> <span class="n">acceptcb</span><span class="p">,</span> <span class="n">app_ctx</span><span class="p">,</span>
|
||
|
|
<span class="n">LEV_OPT_CLOSE_ON_FREE</span> <span class="o">|</span>
|
||
|
|
<span class="n">LEV_OPT_REUSEABLE</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span>
|
||
|
|
<span class="n">rp</span><span class="o">-></span><span class="n">ai_addr</span><span class="p">,</span> <span class="n">rp</span><span class="o">-></span><span class="n">ai_addrlen</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">listener</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s">"Could not start listener"</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>We specify <tt class="docutils literal"><span class="pre">acceptcb</span></tt> callback which is called when a new connection
|
||
|
|
is accepted:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">acceptcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">evconnlistener</span> <span class="o">*</span><span class="n">listener</span><span class="p">,</span> <span class="kt">int</span> <span class="n">fd</span><span class="p">,</span>
|
||
|
|
<span class="k">struct</span> <span class="n">sockaddr</span> <span class="o">*</span><span class="n">addr</span><span class="p">,</span> <span class="kt">int</span> <span class="n">addrlen</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">arg</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span> <span class="o">=</span> <span class="p">(</span><span class="n">app_context</span><span class="o">*</span><span class="p">)</span><span class="n">arg</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">session_data</span> <span class="o">=</span> <span class="n">create_http2_session_data</span><span class="p">(</span><span class="n">app_ctx</span><span class="p">,</span> <span class="n">fd</span><span class="p">,</span> <span class="n">addr</span><span class="p">,</span> <span class="n">addrlen</span><span class="p">);</span>
|
||
|
|
<span class="n">bufferevent_setcb</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">,</span> <span class="n">handshake_readcb</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="n">eventcb</span><span class="p">,</span>
|
||
|
|
<span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>Here we create <tt class="docutils literal"><span class="pre">http2_session_data</span></tt> object. The bufferevent for this
|
||
|
|
connection is also initialized at this time. We specify 2 callbacks
|
||
|
|
for the bufferevent: <tt class="docutils literal"><span class="pre">handshake_readcb</span></tt> and <tt class="docutils literal"><span class="pre">eventcb</span></tt>.</p>
|
||
|
|
<p>The <tt class="docutils literal"><span class="pre">eventcb()</span></tt> is invoked by libevent event loop when an event
|
||
|
|
(e.g., connection established, timeout, etc) happens on the underlying
|
||
|
|
network socket:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">eventcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">short</span> <span class="n">events</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_CONNECTED</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s connected</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_EOF</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s disconnected</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_ERROR</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s network error</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_TIMEOUT</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s timeout</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>For <tt class="docutils literal"><span class="pre">BEV_EVENT_EOF</span></tt>, <tt class="docutils literal"><span class="pre">BEV_EVENT_ERROR</span></tt> and <tt class="docutils literal"><span class="pre">BEV_EVENT_TIMEOUT</span></tt>
|
||
|
|
event, we just simply tear down the connection. The
|
||
|
|
<tt class="docutils literal"><span class="pre">delete_http2_session_data()</span></tt> function destroys
|
||
|
|
<tt class="docutils literal"><span class="pre">http2_session_data</span></tt> object and thus its bufferevent member. As a
|
||
|
|
result, the underlying connection is closed. The
|
||
|
|
<tt class="docutils literal"><span class="pre">BEV_EVENT_CONNECTED</span></tt> event is invoked when SSL/TLS handshake is
|
||
|
|
finished successfully.</p>
|
||
|
|
<p>The <tt class="docutils literal"><span class="pre">handshake_readcb()</span></tt> is a callback function to handle 24 bytes
|
||
|
|
magic byte string from a client, since nghttp2 library does not handle
|
||
|
|
it:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">handshake_readcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="kt">uint8_t</span> <span class="n">data</span><span class="p">[</span><span class="mi">24</span><span class="p">];</span>
|
||
|
|
<span class="k">struct</span> <span class="n">evbuffer</span> <span class="o">*</span><span class="n">input</span> <span class="o">=</span> <span class="n">bufferevent_get_input</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">);</span>
|
||
|
|
<span class="kt">int</span> <span class="n">readlen</span> <span class="o">=</span> <span class="n">evbuffer_remove</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span><span class="p">);</span>
|
||
|
|
<span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">conhead</span> <span class="o">=</span> <span class="n">NGHTTP2_CLIENT_CONNECTION_HEADER</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">memcmp</span><span class="p">(</span><span class="n">conhead</span> <span class="o">+</span> <span class="n">NGHTTP2_CLIENT_CONNECTION_HEADER_LEN</span>
|
||
|
|
<span class="o">-</span> <span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">readlen</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span> <span class="o">-=</span> <span class="n">readlen</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">bufferevent_setcb</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">,</span> <span class="n">readcb</span><span class="p">,</span> <span class="n">writecb</span><span class="p">,</span> <span class="n">eventcb</span><span class="p">,</span> <span class="n">ptr</span><span class="p">);</span>
|
||
|
|
<span class="cm">/* Process pending data in buffer since they are not notified</span>
|
||
|
|
<span class="cm"> further */</span>
|
||
|
|
<span class="n">initialize_nghttp2_session</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">send_server_connection_header</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_recv</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>Nothing special here, we just compare the magic byte string received
|
||
|
|
and expected one <a class="reference internal" href="apiref.html#NGHTTP2_CLIENT_CONNECTION_HEADER" title="NGHTTP2_CLIENT_CONNECTION_HEADER"><tt class="xref c c-macro docutils literal"><span class="pre">NGHTTP2_CLIENT_CONNECTION_HEADER</span></tt></a>. When
|
||
|
|
whole magic byte string is received, the connection state is ready for
|
||
|
|
starting HTTP/2.0 communication. First we change the callback
|
||
|
|
functions for the bufferevent object. We use same <tt class="docutils literal"><span class="pre">eventcb</span></tt> as
|
||
|
|
before. But we specify new <tt class="docutils literal"><span class="pre">readcb</span></tt> and <tt class="docutils literal"><span class="pre">writecb</span></tt> function to
|
||
|
|
handle HTTP/2.0 communication. We describe these 2 functions later.</p>
|
||
|
|
<p>We initialize nghttp2 session object which is done in
|
||
|
|
<tt class="docutils literal"><span class="pre">initialize_nghttp2_session()</span></tt>:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">initialize_nghttp2_session</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">nghttp2_session_callbacks</span> <span class="n">callbacks</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
|
||
|
|
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">send_callback</span> <span class="o">=</span> <span class="n">send_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">on_frame_recv_callback</span> <span class="o">=</span> <span class="n">on_frame_recv_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">on_request_recv_callback</span> <span class="o">=</span> <span class="n">on_request_recv_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">on_stream_close_callback</span> <span class="o">=</span> <span class="n">on_stream_close_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_session_server_new</span><span class="p">(</span><span class="o">&</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">,</span> <span class="o">&</span><span class="n">callbacks</span><span class="p">,</span> <span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>Since we are creating server, nghttp2 session object is created using
|
||
|
|
<a class="reference internal" href="apiref.html#nghttp2_session_server_new" title="nghttp2_session_server_new"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_server_new()</span></tt></a> function. We registers 4 callbacks to
|
||
|
|
nghttp2 session object. We’ll talk about these callbacks later.</p>
|
||
|
|
<p>After initialization of nghttp2 session object, we are going to send
|
||
|
|
server connection header in <tt class="docutils literal"><span class="pre">send_server_connection_header()</span></tt>:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">send_server_connection_header</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">nghttp2_settings_entry</span> <span class="n">iv</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
|
||
|
|
<span class="p">{</span> <span class="n">NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS</span><span class="p">,</span> <span class="mi">100</span> <span class="p">}</span>
|
||
|
|
<span class="p">};</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_submit_settings</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">,</span> <span class="n">NGHTTP2_FLAG_NONE</span><span class="p">,</span>
|
||
|
|
<span class="n">iv</span><span class="p">,</span> <span class="n">ARRLEN</span><span class="p">(</span><span class="n">iv</span><span class="p">));</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>The server connection header is SETTINGS frame. We specify
|
||
|
|
SETTINGS_MAX_CONCURRENT_STREAMS to 100 in SETTINGS frame. To queue
|
||
|
|
the SETTINGS frame for the transmission, we use
|
||
|
|
<a class="reference internal" href="apiref.html#nghttp2_submit_settings" title="nghttp2_submit_settings"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_submit_settings()</span></tt></a>. Note that <a class="reference internal" href="apiref.html#nghttp2_submit_settings" title="nghttp2_submit_settings"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_submit_settings()</span></tt></a>
|
||
|
|
function only queues the frame and not actually send it. All
|
||
|
|
<tt class="docutils literal"><span class="pre">nghttp2_submit_*()</span></tt> family functions have this property. To
|
||
|
|
actually send the frame, <a class="reference internal" href="apiref.html#nghttp2_session_send" title="nghttp2_session_send"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_send()</span></tt></a> is used, which is
|
||
|
|
described about later.</p>
|
||
|
|
<p>Since bufferevent may buffer more than first 24 bytes from the client,
|
||
|
|
we have to process them here since libevent won’t invoke callback
|
||
|
|
functions for these pending data. To process received data, we call
|
||
|
|
<tt class="docutils literal"><span class="pre">session_recv()</span></tt> function:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">session_recv</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">evbuffer</span> <span class="o">*</span><span class="n">input</span> <span class="o">=</span> <span class="n">bufferevent_get_input</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">);</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">datalen</span> <span class="o">=</span> <span class="n">evbuffer_get_length</span><span class="p">(</span><span class="n">input</span><span class="p">);</span>
|
||
|
|
<span class="kt">unsigned</span> <span class="kt">char</span> <span class="o">*</span><span class="n">data</span> <span class="o">=</span> <span class="n">evbuffer_pullup</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">);</span>
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_session_mem_recv</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">datalen</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">evbuffer_drain</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="n">rv</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_send</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>In this function, we feed all unprocessed, received data to nghttp2
|
||
|
|
session object using <a class="reference internal" href="apiref.html#nghttp2_session_mem_recv" title="nghttp2_session_mem_recv"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_mem_recv()</span></tt></a> function. The
|
||
|
|
<a class="reference internal" href="apiref.html#nghttp2_session_mem_recv" title="nghttp2_session_mem_recv"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_mem_recv()</span></tt></a> processes the received data and may
|
||
|
|
invoke nghttp2 callbacks and also queue frames. Since there may be
|
||
|
|
pending frames, we call <tt class="docutils literal"><span class="pre">session_send()</span></tt> function to send those
|
||
|
|
frames. The <tt class="docutils literal"><span class="pre">session_send()</span></tt> function is defined as follows:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">session_send</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_session_send</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>The <a class="reference internal" href="apiref.html#nghttp2_session_send" title="nghttp2_session_send"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_send()</span></tt></a> function serializes the frame into wire
|
||
|
|
format and call <tt class="xref c c-member docutils literal"><span class="pre">nghttp2_callbacks.nghttp2_send_callback</span></tt> with
|
||
|
|
it. We set <tt class="docutils literal"><span class="pre">send_callback()</span></tt> function as
|
||
|
|
<a class="reference internal" href="apiref.html#nghttp2_session_callbacks.send_callback" title="nghttp2_session_callbacks.send_callback"><tt class="xref c c-member docutils literal"><span class="pre">nghttp2_session_callbacks.send_callback</span></tt></a> in
|
||
|
|
<tt class="docutils literal"><span class="pre">initialize_nghttp2_session()</span></tt> function described earlier. It is
|
||
|
|
defined as follows:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">ssize_t</span> <span class="nf">send_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="k">const</span> <span class="kt">uint8_t</span> <span class="o">*</span><span class="n">data</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">length</span><span class="p">,</span>
|
||
|
|
<span class="kt">int</span> <span class="n">flags</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span> <span class="o">=</span> <span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">;</span>
|
||
|
|
<span class="cm">/* Avoid excessive buffering in server side. */</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">evbuffer_get_length</span><span class="p">(</span><span class="n">bufferevent_get_output</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">))</span> <span class="o">>=</span>
|
||
|
|
<span class="n">OUTPUT_WOULDBLOCK_THRESHOLD</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_WOULDBLOCK</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">bufferevent_write</span><span class="p">(</span><span class="n">bev</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">length</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="n">length</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>Since we use bufferevent to abstract network I/O, we just write the
|
||
|
|
data to the bufferevent object. Note that <a class="reference internal" href="apiref.html#nghttp2_session_send" title="nghttp2_session_send"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_send()</span></tt></a>
|
||
|
|
continues to write all frames queued so far. If we were writing the
|
||
|
|
data to the non-blocking socket directly using <tt class="docutils literal"><span class="pre">write()</span></tt> system call
|
||
|
|
in the <a class="reference internal" href="apiref.html#nghttp2_session_callbacks.send_callback" title="nghttp2_session_callbacks.send_callback"><tt class="xref c c-member docutils literal"><span class="pre">nghttp2_session_callbacks.send_callback</span></tt></a>, we will
|
||
|
|
surely get <tt class="docutils literal"><span class="pre">EAGAIN</span></tt> or <tt class="docutils literal"><span class="pre">EWOULDBLOCK</span></tt> since the socket has limited
|
||
|
|
send buffer. If that happens, we can return
|
||
|
|
<a class="reference internal" href="apiref.html#NGHTTP2_ERR_WOULDBLOCK" title="NGHTTP2_ERR_WOULDBLOCK"><tt class="xref c c-macro docutils literal"><span class="pre">NGHTTP2_ERR_WOULDBLOCK</span></tt></a> to signal the nghttp2 library to stop
|
||
|
|
sending further data. But writing to the bufferevent, we have to
|
||
|
|
regulate the amount data to be buffered by ourselves to avoid possible
|
||
|
|
huge memory consumption. To achieve this, we check the size of output
|
||
|
|
buffer and if it is more than or equal to
|
||
|
|
<tt class="docutils literal"><span class="pre">OUTPUT_WOULDBLOCK_THRESHOLD</span></tt> bytes, we stop writing data and return
|
||
|
|
<a class="reference internal" href="apiref.html#NGHTTP2_ERR_WOULDBLOCK" title="NGHTTP2_ERR_WOULDBLOCK"><tt class="xref c c-macro docutils literal"><span class="pre">NGHTTP2_ERR_WOULDBLOCK</span></tt></a> to tell the library to stop calling
|
||
|
|
send_callback.</p>
|
||
|
|
<p>The next bufferevent callback is <tt class="docutils literal"><span class="pre">readcb()</span></tt>, which is invoked when
|
||
|
|
data is available to read in the bufferevent input buffer:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">readcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_recv</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>In this function, we just call <tt class="docutils literal"><span class="pre">session_recv()</span></tt> to process incoming
|
||
|
|
data.</p>
|
||
|
|
<p>The third bufferevent callback is <tt class="docutils literal"><span class="pre">writecb()</span></tt>, which is invoked when
|
||
|
|
all data written in the bufferevent output buffer have been sent:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">writecb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">evbuffer_get_length</span><span class="p">(</span><span class="n">bufferevent_get_output</span><span class="p">(</span><span class="n">bev</span><span class="p">))</span> <span class="o">></span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">nghttp2_session_want_read</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span> <span class="o">&&</span>
|
||
|
|
<span class="n">nghttp2_session_want_write</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_send</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>First we check whether we should drop connection or not. The nghttp2
|
||
|
|
session object keeps track of reception and transmission of GOAWAY
|
||
|
|
frame and other error conditions as well. Using these information,
|
||
|
|
nghttp2 session object will tell whether the connection should be
|
||
|
|
dropped or not. More specifically, both <a class="reference internal" href="apiref.html#nghttp2_session_want_read" title="nghttp2_session_want_read"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_want_read()</span></tt></a>
|
||
|
|
and <a class="reference internal" href="apiref.html#nghttp2_session_want_write" title="nghttp2_session_want_write"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_want_write()</span></tt></a> return 0, we have no business in
|
||
|
|
the connection. But since we have using bufferevent and its deferred
|
||
|
|
callback option, the bufferevent output buffer may contain the pending
|
||
|
|
data when the <tt class="docutils literal"><span class="pre">writecb()</span></tt> is called. To handle this situation, we
|
||
|
|
also check whether the output buffer is empty or not. If these
|
||
|
|
conditions are met, we drop connection.</p>
|
||
|
|
<p>Otherwise, we call <tt class="docutils literal"><span class="pre">session_send()</span></tt> to process pending output
|
||
|
|
data. Remember that in <tt class="docutils literal"><span class="pre">send_callback()</span></tt>, we may not write all data
|
||
|
|
to bufferevent to avoid excessive buffering. We continue process
|
||
|
|
pending data if output buffer becomes empty.</p>
|
||
|
|
<p>We have already described about nghttp2 callback <tt class="docutils literal"><span class="pre">send_callback()</span></tt>.
|
||
|
|
Let’s describe remaining nghttp2 callbacks we setup in
|
||
|
|
<tt class="docutils literal"><span class="pre">initialize_nghttp2_setup()</span></tt> function.</p>
|
||
|
|
<p>The <tt class="docutils literal"><span class="pre">on_frame_recv_callback()</span></tt> function is invoked when a frame is
|
||
|
|
received from the remote peer:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">on_frame_recv_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="k">const</span> <span class="n">nghttp2_frame</span> <span class="o">*</span><span class="n">frame</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">i</span><span class="p">;</span>
|
||
|
|
<span class="k">const</span> <span class="kt">char</span> <span class="n">PATH</span><span class="p">[]</span> <span class="o">=</span> <span class="s">":path"</span><span class="p">;</span>
|
||
|
|
<span class="k">switch</span><span class="p">(</span><span class="n">frame</span><span class="o">-></span><span class="n">hd</span><span class="p">.</span><span class="n">type</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">case</span> <span class="n">NGHTTP2_HEADERS</span>:
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">frame</span><span class="o">-></span><span class="n">headers</span><span class="p">.</span><span class="n">cat</span> <span class="o">!=</span> <span class="n">NGHTTP2_HCAT_REQUEST</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="n">create_http2_stream_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">,</span> <span class="n">frame</span><span class="o">-></span><span class="n">hd</span><span class="p">.</span><span class="n">stream_id</span><span class="p">);</span>
|
||
|
|
<span class="n">nghttp2_session_set_stream_user_data</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">frame</span><span class="o">-></span><span class="n">hd</span><span class="p">.</span><span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">frame</span><span class="o">-></span><span class="n">headers</span><span class="p">.</span><span class="n">nvlen</span><span class="p">;</span> <span class="o">++</span><span class="n">i</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="o">*</span><span class="n">nv</span> <span class="o">=</span> <span class="o">&</span><span class="n">frame</span><span class="o">-></span><span class="n">headers</span><span class="p">.</span><span class="n">nva</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">nv</span><span class="o">-></span><span class="n">namelen</span> <span class="o">==</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">PATH</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span> <span class="o">&&</span>
|
||
|
|
<span class="n">memcmp</span><span class="p">(</span><span class="n">PATH</span><span class="p">,</span> <span class="n">nv</span><span class="o">-></span><span class="n">name</span><span class="p">,</span> <span class="n">nv</span><span class="o">-></span><span class="n">namelen</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">j</span><span class="p">;</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">j</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">j</span> <span class="o"><</span> <span class="n">nv</span><span class="o">-></span><span class="n">valuelen</span> <span class="o">&&</span> <span class="n">nv</span><span class="o">-></span><span class="n">value</span><span class="p">[</span><span class="n">j</span><span class="p">]</span> <span class="o">!=</span> <span class="sc">'?'</span><span class="p">;</span> <span class="o">++</span><span class="n">j</span><span class="p">);</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span> <span class="o">=</span> <span class="n">percent_decode</span><span class="p">(</span><span class="n">nv</span><span class="o">-></span><span class="n">value</span><span class="p">,</span> <span class="n">j</span><span class="p">);</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="nl">default:</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>We only interested HEADERS frame in this function. Since HEADERS frame
|
||
|
|
has several roles in HTTP/2.0 protocol, we check that it is a request
|
||
|
|
HEADERS, which opens new stream. If frame is request HEADERS, then we
|
||
|
|
create <tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> object to store stream related data. We
|
||
|
|
associate created <tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> object to the stream in
|
||
|
|
nghttp2 session object using <tt class="xref c c-func docutils literal"><span class="pre">nghttp2_set_stream_user_data()</span></tt> in order
|
||
|
|
to get the object without searching through doubly linked list.</p>
|
||
|
|
<p>In this example server, we want to server static file relative to the
|
||
|
|
current working directory the program was invoked. We search <tt class="docutils literal"><span class="pre">:path</span></tt>
|
||
|
|
header field in request headers and keep the requested path in
|
||
|
|
<tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> object. In this example program, we ignore
|
||
|
|
<tt class="docutils literal"><span class="pre">:method</span></tt> header field and always treat the request as GET request.</p>
|
||
|
|
<p>It is ok for the server to start sending response in this callback. In
|
||
|
|
this example, we defer it to <tt class="docutils literal"><span class="pre">on_request_recv_callback()</span></tt> function.</p>
|
||
|
|
<p>The <tt class="docutils literal"><span class="pre">on_request_recv_callback()</span></tt> function is invoked when all HTTP
|
||
|
|
request, including entity body, was received:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">on_request_recv_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="n">hdrs</span><span class="p">[]</span> <span class="o">=</span> <span class="p">{</span>
|
||
|
|
<span class="n">MAKE_NV</span><span class="p">(</span><span class="s">":status"</span><span class="p">,</span> <span class="s">"200"</span><span class="p">)</span>
|
||
|
|
<span class="p">};</span>
|
||
|
|
<span class="kt">char</span> <span class="o">*</span><span class="n">rel_path</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_stream_data</span><span class="o">*</span><span class="p">)</span><span class="n">nghttp2_session_get_stream_user_data</span>
|
||
|
|
<span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">error_reply</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s GET %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">,</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="n">check_path</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">))</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">error_reply</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">rel_path</span> <span class="o">=</span> <span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">;</span> <span class="o">*</span><span class="n">rel_path</span> <span class="o">==</span> <span class="sc">'/'</span><span class="p">;</span> <span class="o">++</span><span class="n">rel_path</span><span class="p">);</span>
|
||
|
|
<span class="n">fd</span> <span class="o">=</span> <span class="n">open</span><span class="p">(</span><span class="n">rel_path</span><span class="p">,</span> <span class="n">O_RDONLY</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">fd</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">error_reply</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">fd</span> <span class="o">=</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">send_response</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">,</span> <span class="n">hdrs</span><span class="p">,</span> <span class="n">ARRLEN</span><span class="p">(</span><span class="n">hdrs</span><span class="p">),</span> <span class="n">fd</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">close</span><span class="p">(</span><span class="n">fd</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>First we retrieve <tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> object associated to the
|
||
|
|
stream in <tt class="docutils literal"><span class="pre">on_frame_recv_callback()</span></tt>. It is done using
|
||
|
|
<a class="reference internal" href="apiref.html#nghttp2_session_get_stream_user_data" title="nghttp2_session_get_stream_user_data"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_session_get_stream_user_data()</span></tt></a>. If the requested path cannot
|
||
|
|
be served for some reasons (e.g., file is not found), we send 404
|
||
|
|
response, which is done in <tt class="docutils literal"><span class="pre">error_reply()</span></tt>. Otherwise, we open
|
||
|
|
requested file and send its content. We send 1 header field
|
||
|
|
<tt class="docutils literal"><span class="pre">:status</span></tt> as a response header.</p>
|
||
|
|
<p>Sending content of a file is done in <tt class="docutils literal"><span class="pre">send_response()</span></tt> function:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">send_response</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span> <span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="o">*</span><span class="n">nva</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">nvlen</span><span class="p">,</span> <span class="kt">int</span> <span class="n">fd</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_data_provider</span> <span class="n">data_prd</span><span class="p">;</span>
|
||
|
|
<span class="n">data_prd</span><span class="p">.</span><span class="n">source</span><span class="p">.</span><span class="n">fd</span> <span class="o">=</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="n">data_prd</span><span class="p">.</span><span class="n">read_callback</span> <span class="o">=</span> <span class="n">file_read_callback</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_submit_response</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">,</span> <span class="n">nva</span><span class="p">,</span> <span class="n">nvlen</span><span class="p">,</span> <span class="o">&</span><span class="n">data_prd</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>The nghttp2 library uses <a class="reference internal" href="apiref.html#nghttp2_data_provider" title="nghttp2_data_provider"><tt class="xref c c-type docutils literal"><span class="pre">nghttp2_data_provider</span></tt></a> structure to
|
||
|
|
send entity body to the remote peer. The <tt class="docutils literal"><span class="pre">source</span></tt> member of this
|
||
|
|
structure is a union and it can be either void pointer or int which is
|
||
|
|
intended to be used as file descriptor. In this example server, we use
|
||
|
|
file descriptor. We also set <tt class="docutils literal"><span class="pre">file_read_callback()</span></tt> callback
|
||
|
|
function to read content of the file:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">ssize_t</span> <span class="nf">file_read_callback</span>
|
||
|
|
<span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span> <span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="kt">uint8_t</span> <span class="o">*</span><span class="n">buf</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">length</span><span class="p">,</span> <span class="kt">int</span> <span class="o">*</span><span class="n">eof</span><span class="p">,</span>
|
||
|
|
<span class="n">nghttp2_data_source</span> <span class="o">*</span><span class="n">source</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span> <span class="o">=</span> <span class="n">source</span><span class="o">-></span><span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="kt">ssize_t</span> <span class="n">r</span><span class="p">;</span>
|
||
|
|
<span class="k">while</span><span class="p">((</span><span class="n">r</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">length</span><span class="p">))</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span> <span class="o">&&</span> <span class="n">errno</span> <span class="o">==</span> <span class="n">EINTR</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">r</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">r</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="o">*</span><span class="n">eof</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="n">r</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>If error happens while reading file, we return
|
||
|
|
<a class="reference internal" href="apiref.html#NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE" title="NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE"><tt class="xref c c-macro docutils literal"><span class="pre">NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE</span></tt></a>. This tells the library
|
||
|
|
to send RST_STREAM to the stream. When all data is read, set 1 to
|
||
|
|
<tt class="docutils literal"><span class="pre">*eof</span></tt> to tell the nghttp2 library that we have finished reading
|
||
|
|
file.</p>
|
||
|
|
<p>The <a class="reference internal" href="apiref.html#nghttp2_submit_response" title="nghttp2_submit_response"><tt class="xref c c-func docutils literal"><span class="pre">nghttp2_submit_response()</span></tt></a> is used to send response to the remote
|
||
|
|
peer.</p>
|
||
|
|
<p>The <tt class="docutils literal"><span class="pre">on_stream_close_callback()</span></tt> function is invoked when the stream
|
||
|
|
is about to close:</p>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="k">static</span> <span class="kt">int</span> <span class="nf">on_stream_close_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">nghttp2_error_code</span> <span class="n">error_code</span><span class="p">,</span>
|
||
|
|
<span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="n">nghttp2_session_get_stream_user_data</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">);</span>
|
||
|
|
<span class="n">remove_stream</span><span class="p">(</span><span class="n">session_data</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="n">delete_http2_stream_data</span><span class="p">(</span><span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
<p>We destroy <tt class="docutils literal"><span class="pre">http2_stream_data</span></tt> object in this function since the
|
||
|
|
stream is about to close and we no longer to use that object.</p>
|
||
|
|
<div class="section" id="libevent-server-c">
|
||
|
|
<h2>libevent-server.c<a class="headerlink" href="#libevent-server-c" title="Permalink to this headline">¶</a></h2>
|
||
|
|
<div class="highlight-c"><div class="highlight"><pre><span class="cm">/*</span>
|
||
|
|
<span class="cm"> * nghttp2 - HTTP/2.0 C Library</span>
|
||
|
|
<span class="cm"> *</span>
|
||
|
|
<span class="cm"> * Copyright (c) 2013 Tatsuhiro Tsujikawa</span>
|
||
|
|
<span class="cm"> *</span>
|
||
|
|
<span class="cm"> * Permission is hereby granted, free of charge, to any person obtaining</span>
|
||
|
|
<span class="cm"> * a copy of this software and associated documentation files (the</span>
|
||
|
|
<span class="cm"> * "Software"), to deal in the Software without restriction, including</span>
|
||
|
|
<span class="cm"> * without limitation the rights to use, copy, modify, merge, publish,</span>
|
||
|
|
<span class="cm"> * distribute, sublicense, and/or sell copies of the Software, and to</span>
|
||
|
|
<span class="cm"> * permit persons to whom the Software is furnished to do so, subject to</span>
|
||
|
|
<span class="cm"> * the following conditions:</span>
|
||
|
|
<span class="cm"> *</span>
|
||
|
|
<span class="cm"> * The above copyright notice and this permission notice shall be</span>
|
||
|
|
<span class="cm"> * included in all copies or substantial portions of the Software.</span>
|
||
|
|
<span class="cm"> *</span>
|
||
|
|
<span class="cm"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
|
||
|
|
<span class="cm"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
|
||
|
|
<span class="cm"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
|
||
|
|
<span class="cm"> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE</span>
|
||
|
|
<span class="cm"> * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION</span>
|
||
|
|
<span class="cm"> * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span>
|
||
|
|
<span class="cm"> * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
|
||
|
|
<span class="cm"> */</span>
|
||
|
|
<span class="cp">#include <sys/types.h></span>
|
||
|
|
<span class="cp">#include <sys/socket.h></span>
|
||
|
|
<span class="cp">#include <netdb.h></span>
|
||
|
|
<span class="cp">#include <signal.h></span>
|
||
|
|
<span class="cp">#include <unistd.h></span>
|
||
|
|
<span class="cp">#include <sys/stat.h></span>
|
||
|
|
<span class="cp">#include <fcntl.h></span>
|
||
|
|
<span class="cp">#include <ctype.h></span>
|
||
|
|
<span class="cp">#include <netinet/tcp.h></span>
|
||
|
|
<span class="cp">#include <err.h></span>
|
||
|
|
|
||
|
|
<span class="cp">#include <openssl/ssl.h></span>
|
||
|
|
<span class="cp">#include <openssl/err.h></span>
|
||
|
|
|
||
|
|
<span class="cp">#include <event.h></span>
|
||
|
|
<span class="cp">#include <event2/event.h></span>
|
||
|
|
<span class="cp">#include <event2/bufferevent_ssl.h></span>
|
||
|
|
<span class="cp">#include <event2/listener.h></span>
|
||
|
|
|
||
|
|
<span class="cp">#include <nghttp2/nghttp2.h></span>
|
||
|
|
|
||
|
|
<span class="cp">#define OUTPUT_WOULDBLOCK_THRESHOLD (1 << 16)</span>
|
||
|
|
|
||
|
|
<span class="cp">#define ARRLEN(x) (sizeof(x)/sizeof(x[0]))</span>
|
||
|
|
|
||
|
|
<span class="cp">#define MAKE_NV(NAME, VALUE) \</span>
|
||
|
|
<span class="cp"> { (uint8_t*)NAME, (uint8_t*)VALUE, sizeof(NAME) - 1, sizeof(VALUE) - 1 }</span>
|
||
|
|
|
||
|
|
<span class="k">struct</span> <span class="n">app_context</span><span class="p">;</span>
|
||
|
|
<span class="k">typedef</span> <span class="k">struct</span> <span class="n">app_context</span> <span class="n">app_context</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">typedef</span> <span class="k">struct</span> <span class="n">http2_stream_data</span> <span class="p">{</span>
|
||
|
|
<span class="k">struct</span> <span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">prev</span><span class="p">,</span> <span class="o">*</span><span class="n">next</span><span class="p">;</span>
|
||
|
|
<span class="kt">char</span> <span class="o">*</span><span class="n">request_path</span><span class="p">;</span>
|
||
|
|
<span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">;</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span> <span class="n">http2_stream_data</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">typedef</span> <span class="k">struct</span> <span class="n">http2_session_data</span> <span class="p">{</span>
|
||
|
|
<span class="k">struct</span> <span class="n">http2_stream_data</span> <span class="n">root</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">;</span>
|
||
|
|
<span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">;</span>
|
||
|
|
<span class="kt">char</span> <span class="o">*</span><span class="n">client_addr</span><span class="p">;</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">handshake_leftlen</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span> <span class="n">http2_session_data</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">struct</span> <span class="n">app_context</span> <span class="p">{</span>
|
||
|
|
<span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">event_base</span> <span class="o">*</span><span class="n">evbase</span><span class="p">;</span>
|
||
|
|
<span class="p">};</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">unsigned</span> <span class="kt">char</span> <span class="n">next_proto_list</span><span class="p">[</span><span class="mi">256</span><span class="p">];</span>
|
||
|
|
<span class="k">static</span> <span class="kt">size_t</span> <span class="n">next_proto_list_len</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">next_proto_cb</span><span class="p">(</span><span class="n">SSL</span> <span class="o">*</span><span class="n">s</span><span class="p">,</span> <span class="k">const</span> <span class="kt">unsigned</span> <span class="kt">char</span> <span class="o">**</span><span class="n">data</span><span class="p">,</span> <span class="kt">unsigned</span> <span class="kt">int</span> <span class="o">*</span><span class="n">len</span><span class="p">,</span>
|
||
|
|
<span class="kt">void</span> <span class="o">*</span><span class="n">arg</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="o">*</span><span class="n">data</span> <span class="o">=</span> <span class="n">next_proto_list</span><span class="p">;</span>
|
||
|
|
<span class="o">*</span><span class="n">len</span> <span class="o">=</span> <span class="n">next_proto_list_len</span><span class="p">;</span>
|
||
|
|
<span class="k">return</span> <span class="n">SSL_TLSEXT_ERR_OK</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Create SSL_CTX. */</span>
|
||
|
|
<span class="k">static</span> <span class="n">SSL_CTX</span><span class="o">*</span> <span class="nf">create_ssl_ctx</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">key_file</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">cert_file</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">;</span>
|
||
|
|
<span class="n">ssl_ctx</span> <span class="o">=</span> <span class="n">SSL_CTX_new</span><span class="p">(</span><span class="n">SSLv23_server_method</span><span class="p">());</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="n">ssl_ctx</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s">"Could not create SSL/TLS context: %s"</span><span class="p">,</span>
|
||
|
|
<span class="n">ERR_error_string</span><span class="p">(</span><span class="n">ERR_get_error</span><span class="p">(),</span> <span class="nb">NULL</span><span class="p">));</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">SSL_CTX_set_options</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">,</span>
|
||
|
|
<span class="n">SSL_OP_ALL</span> <span class="o">|</span> <span class="n">SSL_OP_NO_SSLv2</span> <span class="o">|</span> <span class="n">SSL_OP_NO_COMPRESSION</span> <span class="o">|</span>
|
||
|
|
<span class="n">SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION</span><span class="p">);</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">SSL_CTX_use_PrivateKey_file</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">,</span> <span class="n">key_file</span><span class="p">,</span>
|
||
|
|
<span class="n">SSL_FILETYPE_PEM</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s">"Could not read private key file %s"</span><span class="p">,</span> <span class="n">key_file</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">SSL_CTX_use_certificate_chain_file</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">,</span> <span class="n">cert_file</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s">"Could not read certificate file %s"</span><span class="p">,</span> <span class="n">cert_file</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="n">next_proto_list</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="n">NGHTTP2_PROTO_VERSION_ID_LEN</span><span class="p">;</span>
|
||
|
|
<span class="n">memcpy</span><span class="p">(</span><span class="o">&</span><span class="n">next_proto_list</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">NGHTTP2_PROTO_VERSION_ID</span><span class="p">,</span>
|
||
|
|
<span class="n">NGHTTP2_PROTO_VERSION_ID_LEN</span><span class="p">);</span>
|
||
|
|
<span class="n">next_proto_list_len</span> <span class="o">=</span> <span class="mi">1</span> <span class="o">+</span> <span class="n">NGHTTP2_PROTO_VERSION_ID_LEN</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">SSL_CTX_set_next_protos_advertised_cb</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">,</span> <span class="n">next_proto_cb</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="n">ssl_ctx</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Create SSL object */</span>
|
||
|
|
<span class="k">static</span> <span class="n">SSL</span><span class="o">*</span> <span class="nf">create_ssl</span><span class="p">(</span><span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">SSL</span> <span class="o">*</span><span class="n">ssl</span><span class="p">;</span>
|
||
|
|
<span class="n">ssl</span> <span class="o">=</span> <span class="n">SSL_new</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="n">ssl</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s">"Could not create SSL/TLS session object: %s"</span><span class="p">,</span>
|
||
|
|
<span class="n">ERR_error_string</span><span class="p">(</span><span class="n">ERR_get_error</span><span class="p">(),</span> <span class="nb">NULL</span><span class="p">));</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="n">ssl</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">add_stream</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">,</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">next</span> <span class="o">=</span> <span class="n">session_data</span><span class="o">-></span><span class="n">root</span><span class="p">.</span><span class="n">next</span><span class="p">;</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">root</span><span class="p">.</span><span class="n">next</span> <span class="o">=</span> <span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">prev</span> <span class="o">=</span> <span class="o">&</span><span class="n">session_data</span><span class="o">-></span><span class="n">root</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">next</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">next</span><span class="o">-></span><span class="n">prev</span> <span class="o">=</span> <span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">remove_stream</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">,</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">prev</span><span class="o">-></span><span class="n">next</span> <span class="o">=</span> <span class="n">stream_data</span><span class="o">-></span><span class="n">next</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">next</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">next</span><span class="o">-></span><span class="n">prev</span> <span class="o">=</span> <span class="n">stream_data</span><span class="o">-></span><span class="n">prev</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="n">http2_stream_data</span><span class="o">*</span> <span class="nf">create_http2_stream_data</span>
|
||
|
|
<span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">,</span> <span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="n">malloc</span><span class="p">(</span><span class="k">sizeof</span><span class="p">(</span><span class="n">http2_stream_data</span><span class="p">));</span>
|
||
|
|
<span class="n">memset</span><span class="p">(</span><span class="n">stream_data</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">http2_stream_data</span><span class="p">));</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">stream_id</span> <span class="o">=</span> <span class="n">stream_id</span><span class="p">;</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">fd</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">add_stream</span><span class="p">(</span><span class="n">session_data</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">delete_http2_stream_data</span><span class="p">(</span><span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">fd</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">close</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">fd</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">free</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">);</span>
|
||
|
|
<span class="n">free</span><span class="p">(</span><span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="n">http2_session_data</span><span class="o">*</span> <span class="nf">create_http2_session_data</span><span class="p">(</span><span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span><span class="p">,</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span><span class="p">,</span>
|
||
|
|
<span class="k">struct</span> <span class="n">sockaddr</span> <span class="o">*</span><span class="n">addr</span><span class="p">,</span>
|
||
|
|
<span class="kt">int</span> <span class="n">addrlen</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">;</span>
|
||
|
|
<span class="n">SSL</span> <span class="o">*</span><span class="n">ssl</span><span class="p">;</span>
|
||
|
|
<span class="kt">char</span> <span class="n">host</span><span class="p">[</span><span class="n">NI_MAXHOST</span><span class="p">];</span>
|
||
|
|
<span class="kt">int</span> <span class="n">val</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">ssl</span> <span class="o">=</span> <span class="n">create_ssl</span><span class="p">(</span><span class="n">app_ctx</span><span class="o">-></span><span class="n">ssl_ctx</span><span class="p">);</span>
|
||
|
|
<span class="n">session_data</span> <span class="o">=</span> <span class="n">malloc</span><span class="p">(</span><span class="k">sizeof</span><span class="p">(</span><span class="n">http2_session_data</span><span class="p">));</span>
|
||
|
|
<span class="n">memset</span><span class="p">(</span><span class="n">session_data</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">http2_session_data</span><span class="p">));</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">app_ctx</span> <span class="o">=</span> <span class="n">app_ctx</span><span class="p">;</span>
|
||
|
|
<span class="n">setsockopt</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">IPPROTO_TCP</span><span class="p">,</span> <span class="n">TCP_NODELAY</span><span class="p">,</span> <span class="p">(</span><span class="kt">char</span> <span class="o">*</span><span class="p">)</span><span class="o">&</span><span class="n">val</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">val</span><span class="p">));</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">bev</span> <span class="o">=</span> <span class="n">bufferevent_openssl_socket_new</span>
|
||
|
|
<span class="p">(</span><span class="n">app_ctx</span><span class="o">-></span><span class="n">evbase</span><span class="p">,</span> <span class="n">fd</span><span class="p">,</span> <span class="n">ssl</span><span class="p">,</span>
|
||
|
|
<span class="n">BUFFEREVENT_SSL_ACCEPTING</span><span class="p">,</span>
|
||
|
|
<span class="n">BEV_OPT_CLOSE_ON_FREE</span> <span class="o">|</span> <span class="n">BEV_OPT_DEFER_CALLBACKS</span><span class="p">);</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span> <span class="o">=</span> <span class="n">NGHTTP2_CLIENT_CONNECTION_HEADER_LEN</span><span class="p">;</span>
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">getnameinfo</span><span class="p">(</span><span class="n">addr</span><span class="p">,</span> <span class="n">addrlen</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">host</span><span class="p">),</span> <span class="nb">NULL</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">NI_NUMERICHOST</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span> <span class="o">=</span> <span class="n">strdup</span><span class="p">(</span><span class="s">"(unknown)"</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span> <span class="o">=</span> <span class="n">strdup</span><span class="p">(</span><span class="n">host</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">return</span> <span class="n">session_data</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">delete_http2_session_data</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="n">SSL</span> <span class="o">*</span><span class="n">ssl</span> <span class="o">=</span> <span class="n">bufferevent_openssl_get_ssl</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">);</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">ssl</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">SSL_shutdown</span><span class="p">(</span><span class="n">ssl</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">bufferevent_free</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">);</span>
|
||
|
|
<span class="n">nghttp2_session_del</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">);</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">stream_data</span> <span class="o">=</span> <span class="n">session_data</span><span class="o">-></span><span class="n">root</span><span class="p">.</span><span class="n">next</span><span class="p">;</span> <span class="n">stream_data</span><span class="p">;)</span> <span class="p">{</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">next</span> <span class="o">=</span> <span class="n">stream_data</span><span class="o">-></span><span class="n">next</span><span class="p">;</span>
|
||
|
|
<span class="n">delete_http2_stream_data</span><span class="p">(</span><span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="n">next</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">free</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="n">free</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Serialize the frame and send (or buffer) the data to</span>
|
||
|
|
<span class="cm"> bufferevent. */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">session_send</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_session_send</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Read the data in the bufferevent and feed them into nghttp2 library</span>
|
||
|
|
<span class="cm"> function. Invocation of nghttp2_session_mem_recv() may make</span>
|
||
|
|
<span class="cm"> additional pending frames, so call session_send() at the end of the</span>
|
||
|
|
<span class="cm"> function. */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">session_recv</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">evbuffer</span> <span class="o">*</span><span class="n">input</span> <span class="o">=</span> <span class="n">bufferevent_get_input</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">);</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">datalen</span> <span class="o">=</span> <span class="n">evbuffer_get_length</span><span class="p">(</span><span class="n">input</span><span class="p">);</span>
|
||
|
|
<span class="kt">unsigned</span> <span class="kt">char</span> <span class="o">*</span><span class="n">data</span> <span class="o">=</span> <span class="n">evbuffer_pullup</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">);</span>
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_session_mem_recv</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">datalen</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">evbuffer_drain</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="n">rv</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_send</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">ssize_t</span> <span class="nf">send_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="k">const</span> <span class="kt">uint8_t</span> <span class="o">*</span><span class="n">data</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">length</span><span class="p">,</span>
|
||
|
|
<span class="kt">int</span> <span class="n">flags</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span> <span class="o">=</span> <span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">;</span>
|
||
|
|
<span class="cm">/* Avoid excessive buffering in server side. */</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">evbuffer_get_length</span><span class="p">(</span><span class="n">bufferevent_get_output</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">))</span> <span class="o">>=</span>
|
||
|
|
<span class="n">OUTPUT_WOULDBLOCK_THRESHOLD</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_WOULDBLOCK</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">bufferevent_write</span><span class="p">(</span><span class="n">bev</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">length</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="n">length</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Returns nonzero if the string |s| ends with the substring |sub| */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">ends_with</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">s</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">sub</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">slen</span> <span class="o">=</span> <span class="n">strlen</span><span class="p">(</span><span class="n">s</span><span class="p">);</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">sublen</span> <span class="o">=</span> <span class="n">strlen</span><span class="p">(</span><span class="n">sub</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">slen</span> <span class="o"><</span> <span class="n">sublen</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="n">memcmp</span><span class="p">(</span><span class="n">s</span> <span class="o">+</span> <span class="n">slen</span> <span class="o">-</span> <span class="n">sublen</span><span class="p">,</span> <span class="n">sub</span><span class="p">,</span> <span class="n">sublen</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Returns int value of hex string character |c| */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">uint8_t</span> <span class="nf">hex_to_uint</span><span class="p">(</span><span class="kt">uint8_t</span> <span class="n">c</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="sc">'0'</span> <span class="o"><=</span> <span class="n">c</span> <span class="o">&&</span> <span class="n">c</span> <span class="o"><=</span> <span class="sc">'9'</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">c</span> <span class="o">-</span> <span class="sc">'0'</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="sc">'A'</span> <span class="o"><=</span> <span class="n">c</span> <span class="o">&&</span> <span class="n">c</span> <span class="o"><=</span> <span class="sc">'F'</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">c</span> <span class="o">-</span> <span class="sc">'A'</span> <span class="o">+</span> <span class="mi">10</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="sc">'a'</span> <span class="o"><=</span> <span class="n">c</span> <span class="o">&&</span> <span class="n">c</span> <span class="o"><=</span> <span class="sc">'f'</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">c</span> <span class="o">-</span> <span class="sc">'a'</span> <span class="o">+</span> <span class="mi">10</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Decodes percent-encoded byte string |value| with length |valuelen|</span>
|
||
|
|
<span class="cm"> and returns the decoded byte string in allocated buffer. The return</span>
|
||
|
|
<span class="cm"> value is NULL terminated. The caller must free the returned</span>
|
||
|
|
<span class="cm"> string. */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">char</span><span class="o">*</span> <span class="nf">percent_decode</span><span class="p">(</span><span class="k">const</span> <span class="kt">uint8_t</span> <span class="o">*</span><span class="n">value</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">valuelen</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">char</span> <span class="o">*</span><span class="n">res</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">res</span> <span class="o">=</span> <span class="n">malloc</span><span class="p">(</span><span class="n">valuelen</span> <span class="o">+</span> <span class="mi">1</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">valuelen</span> <span class="o">></span> <span class="mi">3</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">;</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">j</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">valuelen</span> <span class="o">-</span> <span class="mi">2</span><span class="p">;)</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">!=</span> <span class="sc">'%'</span> <span class="o">||</span>
|
||
|
|
<span class="o">!</span><span class="n">isxdigit</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">])</span> <span class="o">||</span> <span class="o">!</span><span class="n">isxdigit</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="n">i</span> <span class="o">+</span> <span class="mi">2</span><span class="p">]))</span> <span class="p">{</span>
|
||
|
|
<span class="n">res</span><span class="p">[</span><span class="n">j</span><span class="o">++</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span><span class="p">[</span><span class="n">i</span><span class="o">++</span><span class="p">];</span>
|
||
|
|
<span class="k">continue</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">res</span><span class="p">[</span><span class="n">j</span><span class="o">++</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">hex_to_uint</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">])</span> <span class="o"><<</span> <span class="mi">4</span><span class="p">)</span> <span class="o">+</span> <span class="n">hex_to_uint</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="n">i</span> <span class="o">+</span> <span class="mi">2</span><span class="p">]);</span>
|
||
|
|
<span class="n">i</span> <span class="o">+=</span> <span class="mi">3</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">memcpy</span><span class="p">(</span><span class="o">&</span><span class="n">res</span><span class="p">[</span><span class="n">j</span><span class="p">],</span> <span class="o">&</span><span class="n">value</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="mi">2</span><span class="p">);</span>
|
||
|
|
<span class="n">res</span><span class="p">[</span><span class="n">j</span> <span class="o">+</span> <span class="mi">2</span><span class="p">]</span> <span class="o">=</span> <span class="sc">'\0'</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||
|
|
<span class="n">memcpy</span><span class="p">(</span><span class="n">res</span><span class="p">,</span> <span class="n">value</span><span class="p">,</span> <span class="n">valuelen</span><span class="p">);</span>
|
||
|
|
<span class="n">res</span><span class="p">[</span><span class="n">valuelen</span><span class="p">]</span> <span class="o">=</span> <span class="sc">'\0'</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="n">res</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">on_frame_recv_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="k">const</span> <span class="n">nghttp2_frame</span> <span class="o">*</span><span class="n">frame</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">i</span><span class="p">;</span>
|
||
|
|
<span class="k">const</span> <span class="kt">char</span> <span class="n">PATH</span><span class="p">[]</span> <span class="o">=</span> <span class="s">":path"</span><span class="p">;</span>
|
||
|
|
<span class="k">switch</span><span class="p">(</span><span class="n">frame</span><span class="o">-></span><span class="n">hd</span><span class="p">.</span><span class="n">type</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">case</span> <span class="n">NGHTTP2_HEADERS</span>:
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">frame</span><span class="o">-></span><span class="n">headers</span><span class="p">.</span><span class="n">cat</span> <span class="o">!=</span> <span class="n">NGHTTP2_HCAT_REQUEST</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="n">create_http2_stream_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">,</span> <span class="n">frame</span><span class="o">-></span><span class="n">hd</span><span class="p">.</span><span class="n">stream_id</span><span class="p">);</span>
|
||
|
|
<span class="n">nghttp2_session_set_stream_user_data</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">frame</span><span class="o">-></span><span class="n">hd</span><span class="p">.</span><span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">frame</span><span class="o">-></span><span class="n">headers</span><span class="p">.</span><span class="n">nvlen</span><span class="p">;</span> <span class="o">++</span><span class="n">i</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="o">*</span><span class="n">nv</span> <span class="o">=</span> <span class="o">&</span><span class="n">frame</span><span class="o">-></span><span class="n">headers</span><span class="p">.</span><span class="n">nva</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">nv</span><span class="o">-></span><span class="n">namelen</span> <span class="o">==</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">PATH</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span> <span class="o">&&</span>
|
||
|
|
<span class="n">memcmp</span><span class="p">(</span><span class="n">PATH</span><span class="p">,</span> <span class="n">nv</span><span class="o">-></span><span class="n">name</span><span class="p">,</span> <span class="n">nv</span><span class="o">-></span><span class="n">namelen</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="kt">size_t</span> <span class="n">j</span><span class="p">;</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">j</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">j</span> <span class="o"><</span> <span class="n">nv</span><span class="o">-></span><span class="n">valuelen</span> <span class="o">&&</span> <span class="n">nv</span><span class="o">-></span><span class="n">value</span><span class="p">[</span><span class="n">j</span><span class="p">]</span> <span class="o">!=</span> <span class="sc">'?'</span><span class="p">;</span> <span class="o">++</span><span class="n">j</span><span class="p">);</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span> <span class="o">=</span> <span class="n">percent_decode</span><span class="p">(</span><span class="n">nv</span><span class="o">-></span><span class="n">value</span><span class="p">,</span> <span class="n">j</span><span class="p">);</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="nl">default:</span>
|
||
|
|
<span class="k">break</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">ssize_t</span> <span class="nf">file_read_callback</span>
|
||
|
|
<span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span> <span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="kt">uint8_t</span> <span class="o">*</span><span class="n">buf</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">length</span><span class="p">,</span> <span class="kt">int</span> <span class="o">*</span><span class="n">eof</span><span class="p">,</span>
|
||
|
|
<span class="n">nghttp2_data_source</span> <span class="o">*</span><span class="n">source</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span> <span class="o">=</span> <span class="n">source</span><span class="o">-></span><span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="kt">ssize_t</span> <span class="n">r</span><span class="p">;</span>
|
||
|
|
<span class="k">while</span><span class="p">((</span><span class="n">r</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">length</span><span class="p">))</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span> <span class="o">&&</span> <span class="n">errno</span> <span class="o">==</span> <span class="n">EINTR</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">r</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">r</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="o">*</span><span class="n">eof</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="n">r</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">send_response</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span> <span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="o">*</span><span class="n">nva</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">nvlen</span><span class="p">,</span> <span class="kt">int</span> <span class="n">fd</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_data_provider</span> <span class="n">data_prd</span><span class="p">;</span>
|
||
|
|
<span class="n">data_prd</span><span class="p">.</span><span class="n">source</span><span class="p">.</span><span class="n">fd</span> <span class="o">=</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="n">data_prd</span><span class="p">.</span><span class="n">read_callback</span> <span class="o">=</span> <span class="n">file_read_callback</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_submit_response</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">,</span> <span class="n">nva</span><span class="p">,</span> <span class="n">nvlen</span><span class="p">,</span> <span class="o">&</span><span class="n">data_prd</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">const</span> <span class="kt">char</span> <span class="n">ERROR_HTML</span><span class="p">[]</span> <span class="o">=</span> <span class="s">"<html><head><title>404</title></head>"</span>
|
||
|
|
<span class="s">"<body><h1>404 Not Found</h1></body></html>"</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">error_reply</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="kt">int</span> <span class="n">pipefd</span><span class="p">[</span><span class="mi">2</span><span class="p">];</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="n">hdrs</span><span class="p">[]</span> <span class="o">=</span> <span class="p">{</span>
|
||
|
|
<span class="n">MAKE_NV</span><span class="p">(</span><span class="s">":status"</span><span class="p">,</span> <span class="s">"404"</span><span class="p">)</span>
|
||
|
|
<span class="p">};</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">pipe</span><span class="p">(</span><span class="n">pipefd</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warn</span><span class="p">(</span><span class="s">"Could not create pipe"</span><span class="p">);</span>
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_submit_rst_stream</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">NGHTTP2_FLAG_NONE</span><span class="p">,</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">NGHTTP2_INTERNAL_ERROR</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">write</span><span class="p">(</span><span class="n">pipefd</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">ERROR_HTML</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">ERROR_HTML</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">);</span>
|
||
|
|
<span class="n">close</span><span class="p">(</span><span class="n">pipefd</span><span class="p">[</span><span class="mi">1</span><span class="p">]);</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">fd</span> <span class="o">=</span> <span class="n">pipefd</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">send_response</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="o">-></span><span class="n">stream_id</span><span class="p">,</span> <span class="n">hdrs</span><span class="p">,</span> <span class="n">ARRLEN</span><span class="p">(</span><span class="n">hdrs</span><span class="p">),</span>
|
||
|
|
<span class="n">pipefd</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">close</span><span class="p">(</span><span class="n">pipefd</span><span class="p">[</span><span class="mi">0</span><span class="p">]);</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Minimum check for directory traversal. Returns nonzero if it is</span>
|
||
|
|
<span class="cm"> safe. */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">check_path</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">path</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="cm">/* We don't like '\' in url. */</span>
|
||
|
|
<span class="k">return</span> <span class="n">path</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">&&</span> <span class="n">path</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="sc">'/'</span> <span class="o">&&</span>
|
||
|
|
<span class="n">strchr</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="sc">'\\'</span><span class="p">)</span> <span class="o">==</span> <span class="nb">NULL</span> <span class="o">&&</span>
|
||
|
|
<span class="n">strstr</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s">"/../"</span><span class="p">)</span> <span class="o">==</span> <span class="nb">NULL</span> <span class="o">&&</span>
|
||
|
|
<span class="n">strstr</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s">"/./"</span><span class="p">)</span> <span class="o">==</span> <span class="nb">NULL</span> <span class="o">&&</span>
|
||
|
|
<span class="o">!</span><span class="n">ends_with</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s">"/.."</span><span class="p">)</span> <span class="o">&&</span> <span class="o">!</span><span class="n">ends_with</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s">"/."</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">on_request_recv_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="kt">int</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_nv</span> <span class="n">hdrs</span><span class="p">[]</span> <span class="o">=</span> <span class="p">{</span>
|
||
|
|
<span class="n">MAKE_NV</span><span class="p">(</span><span class="s">":status"</span><span class="p">,</span> <span class="s">"200"</span><span class="p">)</span>
|
||
|
|
<span class="p">};</span>
|
||
|
|
<span class="kt">char</span> <span class="o">*</span><span class="n">rel_path</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_stream_data</span><span class="o">*</span><span class="p">)</span><span class="n">nghttp2_session_get_stream_user_data</span>
|
||
|
|
<span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">error_reply</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s GET %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">,</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="n">check_path</span><span class="p">(</span><span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">))</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">error_reply</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">rel_path</span> <span class="o">=</span> <span class="n">stream_data</span><span class="o">-></span><span class="n">request_path</span><span class="p">;</span> <span class="o">*</span><span class="n">rel_path</span> <span class="o">==</span> <span class="sc">'/'</span><span class="p">;</span> <span class="o">++</span><span class="n">rel_path</span><span class="p">);</span>
|
||
|
|
<span class="n">fd</span> <span class="o">=</span> <span class="n">open</span><span class="p">(</span><span class="n">rel_path</span><span class="p">,</span> <span class="n">O_RDONLY</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">fd</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">error_reply</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">stream_data</span><span class="o">-></span><span class="n">fd</span> <span class="o">=</span> <span class="n">fd</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">send_response</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">,</span> <span class="n">hdrs</span><span class="p">,</span> <span class="n">ARRLEN</span><span class="p">(</span><span class="n">hdrs</span><span class="p">),</span> <span class="n">fd</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">close</span><span class="p">(</span><span class="n">fd</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="n">NGHTTP2_ERR_CALLBACK_FAILURE</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">on_stream_close_callback</span><span class="p">(</span><span class="n">nghttp2_session</span> <span class="o">*</span><span class="n">session</span><span class="p">,</span>
|
||
|
|
<span class="kt">int32_t</span> <span class="n">stream_id</span><span class="p">,</span>
|
||
|
|
<span class="n">nghttp2_error_code</span> <span class="n">error_code</span><span class="p">,</span>
|
||
|
|
<span class="kt">void</span> <span class="o">*</span><span class="n">user_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">user_data</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_stream_data</span> <span class="o">*</span><span class="n">stream_data</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">stream_data</span> <span class="o">=</span> <span class="n">nghttp2_session_get_stream_user_data</span><span class="p">(</span><span class="n">session</span><span class="p">,</span> <span class="n">stream_id</span><span class="p">);</span>
|
||
|
|
<span class="n">remove_stream</span><span class="p">(</span><span class="n">session_data</span><span class="p">,</span> <span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="n">delete_http2_stream_data</span><span class="p">(</span><span class="n">stream_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">initialize_nghttp2_session</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">nghttp2_session_callbacks</span> <span class="n">callbacks</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
|
||
|
|
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">send_callback</span> <span class="o">=</span> <span class="n">send_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">on_frame_recv_callback</span> <span class="o">=</span> <span class="n">on_frame_recv_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">on_request_recv_callback</span> <span class="o">=</span> <span class="n">on_request_recv_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">callbacks</span><span class="p">.</span><span class="n">on_stream_close_callback</span> <span class="o">=</span> <span class="n">on_stream_close_callback</span><span class="p">;</span>
|
||
|
|
<span class="n">nghttp2_session_server_new</span><span class="p">(</span><span class="o">&</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">,</span> <span class="o">&</span><span class="n">callbacks</span><span class="p">,</span> <span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* Send HTTP/2.0 client connection header, which includes 24 bytes</span>
|
||
|
|
<span class="cm"> magic octets and SETTINGS frame */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">int</span> <span class="nf">send_server_connection_header</span><span class="p">(</span><span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">nghttp2_settings_entry</span> <span class="n">iv</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
|
||
|
|
<span class="p">{</span> <span class="n">NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS</span><span class="p">,</span> <span class="mi">100</span> <span class="p">}</span>
|
||
|
|
<span class="p">};</span>
|
||
|
|
<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">nghttp2_submit_settings</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">,</span> <span class="n">NGHTTP2_FLAG_NONE</span><span class="p">,</span>
|
||
|
|
<span class="n">iv</span><span class="p">,</span> <span class="n">ARRLEN</span><span class="p">(</span><span class="n">iv</span><span class="p">));</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">warnx</span><span class="p">(</span><span class="s">"Fatal error: %s"</span><span class="p">,</span> <span class="n">nghttp2_strerror</span><span class="p">(</span><span class="n">rv</span><span class="p">));</span>
|
||
|
|
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* readcb for bufferevent after client connection header was</span>
|
||
|
|
<span class="cm"> checked. */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">readcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_recv</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* writecb for bufferevent. To greaceful shutdown after sending or</span>
|
||
|
|
<span class="cm"> receiving GOAWAY, we check the some conditions on the nghttp2</span>
|
||
|
|
<span class="cm"> library and output buffer of bufferevent. If it indicates we have</span>
|
||
|
|
<span class="cm"> no business to this session, tear down the connection. If the</span>
|
||
|
|
<span class="cm"> connection is not going to shutdown, we call session_send() to</span>
|
||
|
|
<span class="cm"> process pending data in the output buffer. This is necessary</span>
|
||
|
|
<span class="cm"> because we have a threshold on the buffer size to avoid too much</span>
|
||
|
|
<span class="cm"> buffering. See send_callback(). */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">writecb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">evbuffer_get_length</span><span class="p">(</span><span class="n">bufferevent_get_output</span><span class="p">(</span><span class="n">bev</span><span class="p">))</span> <span class="o">></span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">nghttp2_session_want_read</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span> <span class="o">&&</span>
|
||
|
|
<span class="n">nghttp2_session_want_write</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">session</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_send</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* eventcb for bufferevent */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">eventcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">short</span> <span class="n">events</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_CONNECTED</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s connected</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_EOF</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s disconnected</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_ERROR</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s network error</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">events</span> <span class="o">&</span> <span class="n">BEV_EVENT_TIMEOUT</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s timeout</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">client_addr</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* readcb for bufferevent to check first 24 bytes client connection</span>
|
||
|
|
<span class="cm"> header. */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">handshake_readcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">bufferevent</span> <span class="o">*</span><span class="n">bev</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span> <span class="o">=</span> <span class="p">(</span><span class="n">http2_session_data</span><span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span>
|
||
|
|
<span class="kt">uint8_t</span> <span class="n">data</span><span class="p">[</span><span class="mi">24</span><span class="p">];</span>
|
||
|
|
<span class="k">struct</span> <span class="n">evbuffer</span> <span class="o">*</span><span class="n">input</span> <span class="o">=</span> <span class="n">bufferevent_get_input</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">);</span>
|
||
|
|
<span class="kt">int</span> <span class="n">readlen</span> <span class="o">=</span> <span class="n">evbuffer_remove</span><span class="p">(</span><span class="n">input</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span><span class="p">);</span>
|
||
|
|
<span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">conhead</span> <span class="o">=</span> <span class="n">NGHTTP2_CLIENT_CONNECTION_HEADER</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">memcmp</span><span class="p">(</span><span class="n">conhead</span> <span class="o">+</span> <span class="n">NGHTTP2_CLIENT_CONNECTION_HEADER_LEN</span>
|
||
|
|
<span class="o">-</span> <span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">readlen</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span> <span class="o">-=</span> <span class="n">readlen</span><span class="p">;</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">handshake_leftlen</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">bufferevent_setcb</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">,</span> <span class="n">readcb</span><span class="p">,</span> <span class="n">writecb</span><span class="p">,</span> <span class="n">eventcb</span><span class="p">,</span> <span class="n">ptr</span><span class="p">);</span>
|
||
|
|
<span class="cm">/* Process pending data in buffer since they are not notified</span>
|
||
|
|
<span class="cm"> further */</span>
|
||
|
|
<span class="n">initialize_nghttp2_session</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">send_server_connection_header</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">session_recv</span><span class="p">(</span><span class="n">session_data</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">delete_http2_session_data</span><span class="p">(</span><span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="cm">/* callback for evconnlistener */</span>
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">acceptcb</span><span class="p">(</span><span class="k">struct</span> <span class="n">evconnlistener</span> <span class="o">*</span><span class="n">listener</span><span class="p">,</span> <span class="kt">int</span> <span class="n">fd</span><span class="p">,</span>
|
||
|
|
<span class="k">struct</span> <span class="n">sockaddr</span> <span class="o">*</span><span class="n">addr</span><span class="p">,</span> <span class="kt">int</span> <span class="n">addrlen</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">arg</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span> <span class="o">=</span> <span class="p">(</span><span class="n">app_context</span><span class="o">*</span><span class="p">)</span><span class="n">arg</span><span class="p">;</span>
|
||
|
|
<span class="n">http2_session_data</span> <span class="o">*</span><span class="n">session_data</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">session_data</span> <span class="o">=</span> <span class="n">create_http2_session_data</span><span class="p">(</span><span class="n">app_ctx</span><span class="p">,</span> <span class="n">fd</span><span class="p">,</span> <span class="n">addr</span><span class="p">,</span> <span class="n">addrlen</span><span class="p">);</span>
|
||
|
|
<span class="n">bufferevent_setcb</span><span class="p">(</span><span class="n">session_data</span><span class="o">-></span><span class="n">bev</span><span class="p">,</span> <span class="n">handshake_readcb</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="n">eventcb</span><span class="p">,</span>
|
||
|
|
<span class="n">session_data</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">start_listen</span><span class="p">(</span><span class="k">struct</span> <span class="n">event_base</span> <span class="o">*</span><span class="n">evbase</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">service</span><span class="p">,</span>
|
||
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<span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span><span class="p">)</span>
|
||
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|
<span class="p">{</span>
|
||
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<span class="kt">int</span> <span class="n">rv</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">addrinfo</span> <span class="n">hints</span><span class="p">;</span>
|
||
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|
<span class="k">struct</span> <span class="n">addrinfo</span> <span class="o">*</span><span class="n">res</span><span class="p">,</span> <span class="o">*</span><span class="n">rp</span><span class="p">;</span>
|
||
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||
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<span class="n">memset</span><span class="p">(</span><span class="o">&</span><span class="n">hints</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">hints</span><span class="p">));</span>
|
||
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|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_family</span> <span class="o">=</span> <span class="n">AF_UNSPEC</span><span class="p">;</span>
|
||
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|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_socktype</span> <span class="o">=</span> <span class="n">SOCK_STREAM</span><span class="p">;</span>
|
||
|
|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_flags</span> <span class="o">=</span> <span class="n">AI_PASSIVE</span><span class="p">;</span>
|
||
|
|
<span class="cp">#ifdef AI_ADDRCONFIG</span>
|
||
|
|
<span class="n">hints</span><span class="p">.</span><span class="n">ai_flags</span> <span class="o">|=</span> <span class="n">AI_ADDRCONFIG</span><span class="p">;</span>
|
||
|
|
<span class="cp">#endif </span><span class="c1">// AI_ADDRCONFIG</span>
|
||
|
|
|
||
|
|
<span class="n">rv</span> <span class="o">=</span> <span class="n">getaddrinfo</span><span class="p">(</span><span class="nb">NULL</span><span class="p">,</span> <span class="n">service</span><span class="p">,</span> <span class="o">&</span><span class="n">hints</span><span class="p">,</span> <span class="o">&</span><span class="n">res</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">rv</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="k">for</span><span class="p">(</span><span class="n">rp</span> <span class="o">=</span> <span class="n">res</span><span class="p">;</span> <span class="n">rp</span><span class="p">;</span> <span class="n">rp</span> <span class="o">=</span> <span class="n">rp</span><span class="o">-></span><span class="n">ai_next</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">struct</span> <span class="n">evconnlistener</span> <span class="o">*</span><span class="n">listener</span><span class="p">;</span>
|
||
|
|
<span class="n">listener</span> <span class="o">=</span> <span class="n">evconnlistener_new_bind</span><span class="p">(</span><span class="n">evbase</span><span class="p">,</span> <span class="n">acceptcb</span><span class="p">,</span> <span class="n">app_ctx</span><span class="p">,</span>
|
||
|
|
<span class="n">LEV_OPT_CLOSE_ON_FREE</span> <span class="o">|</span>
|
||
|
|
<span class="n">LEV_OPT_REUSEABLE</span><span class="p">,</span> <span class="mi">16</span><span class="p">,</span>
|
||
|
|
<span class="n">rp</span><span class="o">-></span><span class="n">ai_addr</span><span class="p">,</span> <span class="n">rp</span><span class="o">-></span><span class="n">ai_addrlen</span><span class="p">);</span>
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">listener</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="k">return</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
<span class="n">errx</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s">"Could not start listener"</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">initialize_app_context</span><span class="p">(</span><span class="n">app_context</span> <span class="o">*</span><span class="n">app_ctx</span><span class="p">,</span> <span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">,</span>
|
||
|
|
<span class="k">struct</span> <span class="n">event_base</span> <span class="o">*</span><span class="n">evbase</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">memset</span><span class="p">(</span><span class="n">app_ctx</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">app_context</span><span class="p">));</span>
|
||
|
|
<span class="n">app_ctx</span><span class="o">-></span><span class="n">ssl_ctx</span> <span class="o">=</span> <span class="n">ssl_ctx</span><span class="p">;</span>
|
||
|
|
<span class="n">app_ctx</span><span class="o">-></span><span class="n">evbase</span> <span class="o">=</span> <span class="n">evbase</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="k">static</span> <span class="kt">void</span> <span class="nf">run</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">service</span><span class="p">,</span>
|
||
|
|
<span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">key_file</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">cert_file</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="n">SSL_CTX</span> <span class="o">*</span><span class="n">ssl_ctx</span><span class="p">;</span>
|
||
|
|
<span class="n">app_context</span> <span class="n">app_ctx</span><span class="p">;</span>
|
||
|
|
<span class="k">struct</span> <span class="n">event_base</span> <span class="o">*</span><span class="n">evbase</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="n">ssl_ctx</span> <span class="o">=</span> <span class="n">create_ssl_ctx</span><span class="p">(</span><span class="n">key_file</span><span class="p">,</span> <span class="n">cert_file</span><span class="p">);</span>
|
||
|
|
<span class="n">evbase</span> <span class="o">=</span> <span class="n">event_base_new</span><span class="p">();</span>
|
||
|
|
<span class="n">initialize_app_context</span><span class="p">(</span><span class="o">&</span><span class="n">app_ctx</span><span class="p">,</span> <span class="n">ssl_ctx</span><span class="p">,</span> <span class="n">evbase</span><span class="p">);</span>
|
||
|
|
<span class="n">start_listen</span><span class="p">(</span><span class="n">evbase</span><span class="p">,</span> <span class="n">service</span><span class="p">,</span> <span class="o">&</span><span class="n">app_ctx</span><span class="p">);</span>
|
||
|
|
|
||
|
|
<span class="n">event_base_loop</span><span class="p">(</span><span class="n">evbase</span><span class="p">,</span> <span class="mi">0</span><span class="p">);</span>
|
||
|
|
|
||
|
|
<span class="n">event_base_free</span><span class="p">(</span><span class="n">evbase</span><span class="p">);</span>
|
||
|
|
<span class="n">SSL_CTX_free</span><span class="p">(</span><span class="n">ssl_ctx</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="kt">int</span> <span class="nf">main</span><span class="p">(</span><span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">**</span><span class="n">argv</span><span class="p">)</span>
|
||
|
|
<span class="p">{</span>
|
||
|
|
<span class="k">struct</span> <span class="n">sigaction</span> <span class="n">act</span><span class="p">;</span>
|
||
|
|
|
||
|
|
<span class="k">if</span><span class="p">(</span><span class="n">argc</span> <span class="o"><</span> <span class="mi">4</span><span class="p">)</span> <span class="p">{</span>
|
||
|
|
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"Usage: libevent-server PORT KEY_FILE CERT_FILE</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
|
||
|
|
<span class="n">exit</span><span class="p">(</span><span class="n">EXIT_FAILURE</span><span class="p">);</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
|
||
|
|
<span class="n">memset</span><span class="p">(</span><span class="o">&</span><span class="n">act</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="k">struct</span> <span class="n">sigaction</span><span class="p">));</span>
|
||
|
|
<span class="n">act</span><span class="p">.</span><span class="n">sa_handler</span> <span class="o">=</span> <span class="n">SIG_IGN</span><span class="p">;</span>
|
||
|
|
<span class="n">sigaction</span><span class="p">(</span><span class="n">SIGPIPE</span><span class="p">,</span> <span class="o">&</span><span class="n">act</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
|
||
|
|
|
||
|
|
<span class="n">SSL_load_error_strings</span><span class="p">();</span>
|
||
|
|
<span class="n">SSL_library_init</span><span class="p">();</span>
|
||
|
|
|
||
|
|
<span class="n">run</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">argv</span><span class="p">[</span><span class="mi">2</span><span class="p">],</span> <span class="n">argv</span><span class="p">[</span><span class="mi">3</span><span class="p">]);</span>
|
||
|
|
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
|
||
|
|
<span class="p">}</span>
|
||
|
|
</pre></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
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|
||
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|
||
|
|
<footer>
|
||
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|
||
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|
<div class="rst-footer-buttons">
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||
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<a href="apiref.html" class="btn btn-neutral float-right" title="API Reference"/>Next <span class="icon icon-circle-arrow-right"></span></a>
|
||
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|
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|
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<a href="tutorial-client.html" class="btn btn-neutral" title="Tutorial: HTTP/2.0 client"><span class="icon icon-circle-arrow-left"></span> Previous</a>
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|
<hr/>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
© Copyright 2012, 2013, Tatsuhiro Tsujikawa.
|
||
|
|
</p>
|
||
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|
||
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<a href="https://www.github.com/snide/sphinx_rtd_theme">Sphinx theme</a> provided by <a href="http://readthedocs.org">Read the Docs</a>
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</footer>
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</div>
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</section>
|
||
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</div>
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</body>
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</html>
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