xref: /openbmc/bmcweb/http/http2_connection.hpp (revision d07a5ee30ce9ea5985ab9e2b56c9a90c5aa51e4a) 
1 // SPDX-License-Identifier: Apache-2.0
2 // SPDX-FileCopyrightText: Copyright OpenBMC Authors
3 #pragma once
4 #include "bmcweb_config.h"
5 
6 #include "async_resp.hpp"
7 #include "authentication.hpp"
8 #include "complete_response_fields.hpp"
9 #include "forward_unauthorized.hpp"
10 #include "http_body.hpp"
11 #include "http_connect_types.hpp"
12 #include "http_request.hpp"
13 #include "http_response.hpp"
14 #include "logging.hpp"
15 
16 // NOLINTNEXTLINE(misc-include-cleaner)
17 #include "nghttp2_adapters.hpp"
18 #include "sessions.hpp"
19 
20 #include <nghttp2/nghttp2.h>
21 #include <unistd.h>
22 
23 #include <boost/asio/buffer.hpp>
24 #include <boost/asio/ssl/stream.hpp>
25 #include <boost/beast/core/error.hpp>
26 #include <boost/beast/http/field.hpp>
27 #include <boost/beast/http/fields.hpp>
28 #include <boost/beast/http/message.hpp>
29 #include <boost/beast/http/verb.hpp>
30 #include <boost/optional/optional.hpp>
31 #include <boost/system/error_code.hpp>
32 #include <boost/url/url_view.hpp>
33 
34 #include <array>
35 #include <bit>
36 #include <cstddef>
37 #include <cstdint>
38 #include <functional>
39 #include <map>
40 #include <memory>
41 #include <optional>
42 #include <span>
43 #include <string>
44 #include <string_view>
45 #include <type_traits>
46 #include <utility>
47 #include <vector>
48 
49 namespace crow
50 {
51 
52 struct Http2StreamData
53 {
54     std::shared_ptr<Request> req = std::make_shared<Request>();
55     std::optional<bmcweb::HttpBody::reader> reqReader;
56     std::string accept;
57     std::string acceptEnc;
58     Response res;
59     std::optional<bmcweb::HttpBody::writer> writer;
60 };
61 
62 template <typename Adaptor, typename Handler>
63 class HTTP2Connection :
64     public std::enable_shared_from_this<HTTP2Connection<Adaptor, Handler>>
65 {
66     using self_type = HTTP2Connection<Adaptor, Handler>;
67 
68   public:
HTTP2Connection(boost::asio::ssl::stream<Adaptor> && adaptorIn,Handler * handlerIn,std::function<std::string ()> & getCachedDateStrF,HttpType httpTypeIn,const std::shared_ptr<persistent_data::UserSession> & mtlsSessionIn)69     HTTP2Connection(
70         boost::asio::ssl::stream<Adaptor>&& adaptorIn, Handler* handlerIn,
71         std::function<std::string()>& getCachedDateStrF, HttpType httpTypeIn,
72         const std::shared_ptr<persistent_data::UserSession>& mtlsSessionIn) :
73         httpType(httpTypeIn), adaptor(std::move(adaptorIn)),
74         ngSession(initializeNghttp2Session()), handler(handlerIn),
75         getCachedDateStr(getCachedDateStrF), mtlsSession(mtlsSessionIn)
76     {}
77 
start()78     void start()
79     {
80         // Create the control stream
81         streams[0];
82 
83         if (sendServerConnectionHeader() != 0)
84         {
85             BMCWEB_LOG_ERROR("send_server_connection_header failed");
86             return;
87         }
88         doRead();
89     }
90 
startFromSettings(std::string_view http2UpgradeSettings)91     void startFromSettings(std::string_view http2UpgradeSettings)
92     {
93         int ret = ngSession.sessionUpgrade2(http2UpgradeSettings,
94                                             false /*head_request*/);
95         if (ret != 0)
96         {
97             BMCWEB_LOG_ERROR("Failed to load upgrade header");
98             return;
99         }
100         // Create the control stream
101         streams[0];
102 
103         if (sendServerConnectionHeader() != 0)
104         {
105             BMCWEB_LOG_ERROR("send_server_connection_header failed");
106             return;
107         }
108         doRead();
109     }
110 
sendServerConnectionHeader()111     int sendServerConnectionHeader()
112     {
113         BMCWEB_LOG_DEBUG("send_server_connection_header()");
114 
115         uint32_t maxStreams = 4;
116 
117         // Both of these settings were found experimentally to allow a single
118         // fast stream to upload at a rate equivalent to http1.1  They will
119         // likely be tuned in the future.
120         uint32_t maxFrameSize = 1 << 14;
121         uint32_t windowSize = 1 << 20;
122         std::array<nghttp2_settings_entry, 4> iv = {{
123             {NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, maxStreams},
124             {NGHTTP2_SETTINGS_ENABLE_PUSH, 0},
125             // Set an approximately 1MB window size
126             {NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, windowSize},
127             {NGHTTP2_SETTINGS_MAX_FRAME_SIZE, maxFrameSize},
128         }};
129         if (ngSession.setLocalWindowSize(NGHTTP2_FLAG_NONE, 0, 1 << 20) != 0)
130         {
131             BMCWEB_LOG_ERROR("Failed to set local window size");
132         }
133         int rv = ngSession.submitSettings(iv);
134         if (rv != 0)
135         {
136             BMCWEB_LOG_ERROR("Fatal error: {}", nghttp2_strerror(rv));
137             return -1;
138         }
139         writeBuffer();
140         return 0;
141     }
142 
fileReadCallback(nghttp2_session *,int32_t streamId,uint8_t * buf,size_t length,uint32_t * dataFlags,nghttp2_data_source *,void * userPtr)143     static ssize_t fileReadCallback(
144         nghttp2_session* /* session */, int32_t streamId, uint8_t* buf,
145         size_t length, uint32_t* dataFlags, nghttp2_data_source* /*source*/,
146         void* userPtr)
147     {
148         self_type& self = userPtrToSelf(userPtr);
149 
150         auto streamIt = self.streams.find(streamId);
151         if (streamIt == self.streams.end())
152         {
153             return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
154         }
155         Http2StreamData& stream = streamIt->second;
156         BMCWEB_LOG_DEBUG("File read callback length: {}", length);
157         if (!stream.writer)
158         {
159             return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
160         }
161         boost::beast::error_code ec;
162         boost::optional<std::pair<boost::asio::const_buffer, bool>> out =
163             stream.writer->getWithMaxSize(ec, length);
164         if (ec)
165         {
166             BMCWEB_LOG_CRITICAL("Failed to get buffer");
167             return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
168         }
169         if (!out)
170         {
171             BMCWEB_LOG_ERROR("Empty file, setting EOF");
172             *dataFlags |= NGHTTP2_DATA_FLAG_EOF;
173             return 0;
174         }
175 
176         BMCWEB_LOG_DEBUG("Send chunk of size: {}", out->first.size());
177         if (length < out->first.size())
178         {
179             BMCWEB_LOG_CRITICAL(
180                 "Buffer overflow that should never happen happened");
181             // Should never happen because of length limit on get() above
182             return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
183         }
184         boost::asio::mutable_buffer writeableBuf(buf, length);
185         BMCWEB_LOG_DEBUG("Copying {} bytes to buf", out->first.size());
186         size_t copied = boost::asio::buffer_copy(writeableBuf, out->first);
187         if (copied != out->first.size())
188         {
189             BMCWEB_LOG_ERROR(
190                 "Couldn't copy all {} bytes into buffer, only copied {}",
191                 out->first.size(), copied);
192             return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
193         }
194 
195         if (!out->second)
196         {
197             BMCWEB_LOG_DEBUG("Setting EOF flag");
198             *dataFlags |= NGHTTP2_DATA_FLAG_EOF;
199         }
200         return static_cast<ssize_t>(copied);
201     }
202 
headerFromStringViews(std::string_view name,std::string_view value,uint8_t flags)203     nghttp2_nv headerFromStringViews(std::string_view name,
204                                      std::string_view value, uint8_t flags)
205     {
206         uint8_t* nameData = std::bit_cast<uint8_t*>(name.data());
207         uint8_t* valueData = std::bit_cast<uint8_t*>(value.data());
208         return {nameData, valueData, name.size(), value.size(), flags};
209     }
210 
sendResponse(Response & completedRes,int32_t streamId)211     int sendResponse(Response& completedRes, int32_t streamId)
212     {
213         BMCWEB_LOG_DEBUG("send_response stream_id:{}", streamId);
214 
215         auto it = streams.find(streamId);
216         if (it == streams.end())
217         {
218             close();
219             return -1;
220         }
221         Http2StreamData& stream = it->second;
222         Response& res = stream.res;
223         res = std::move(completedRes);
224 
225         completeResponseFields(stream.accept, stream.acceptEnc, res);
226         res.addHeader(boost::beast::http::field::date, getCachedDateStr());
227         boost::urls::url_view urlView;
228         if (stream.req != nullptr)
229         {
230             urlView = stream.req->url();
231         }
232         res.preparePayload(urlView);
233 
234         boost::beast::http::fields& fields = res.fields();
235         std::string code = std::to_string(res.resultInt());
236         std::vector<nghttp2_nv> hdr;
237         hdr.emplace_back(
238             headerFromStringViews(":status", code, NGHTTP2_NV_FLAG_NONE));
239         for (const boost::beast::http::fields::value_type& header : fields)
240         {
241             hdr.emplace_back(headerFromStringViews(
242                 header.name_string(), header.value(), NGHTTP2_NV_FLAG_NONE));
243         }
244         http::response<bmcweb::HttpBody>& fbody = res.response;
245         stream.writer.emplace(fbody.base(), fbody.body());
246 
247         nghttp2_data_provider dataPrd{
248             .source = {.fd = 0},
249             .read_callback = fileReadCallback,
250         };
251 
252         int rv = ngSession.submitResponse(streamId, hdr, &dataPrd);
253         if (rv != 0)
254         {
255             BMCWEB_LOG_ERROR("Fatal error: {}", nghttp2_strerror(rv));
256             close();
257             return -1;
258         }
259         writeBuffer();
260 
261         return 0;
262     }
263 
initializeNghttp2Session()264     nghttp2_session initializeNghttp2Session()
265     {
266         nghttp2_session_callbacks callbacks;
267         callbacks.setOnFrameRecvCallback(onFrameRecvCallbackStatic);
268         callbacks.setOnStreamCloseCallback(onStreamCloseCallbackStatic);
269         callbacks.setOnHeaderCallback(onHeaderCallbackStatic);
270         callbacks.setOnBeginHeadersCallback(onBeginHeadersCallbackStatic);
271         callbacks.setOnDataChunkRecvCallback(onDataChunkRecvStatic);
272 
273         nghttp2_session session(callbacks);
274         session.setUserData(this);
275 
276         return session;
277     }
278 
onRequestRecv(int32_t streamId)279     int onRequestRecv(int32_t streamId)
280     {
281         BMCWEB_LOG_DEBUG("on_request_recv");
282 
283         auto it = streams.find(streamId);
284         if (it == streams.end())
285         {
286             close();
287             return -1;
288         }
289         auto& reqReader = it->second.reqReader;
290         if (reqReader)
291         {
292             boost::beast::error_code ec;
293             bmcweb::HttpBody::reader::finish(ec);
294             if (ec)
295             {
296                 BMCWEB_LOG_CRITICAL("Failed to finalize payload");
297                 close();
298                 return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
299             }
300         }
301         Request& thisReq = *it->second.req;
302         using boost::beast::http::field;
303         it->second.accept = thisReq.getHeaderValue(field::accept);
304         it->second.acceptEnc = thisReq.getHeaderValue(field::accept_encoding);
305 
306         BMCWEB_LOG_DEBUG("Handling {} \"{}\"", logPtr(&thisReq),
307                          thisReq.url().encoded_path());
308 
309         Response& thisRes = it->second.res;
310 
311         thisRes.setCompleteRequestHandler(
312             [this, streamId](Response& completeRes) {
313                 BMCWEB_LOG_DEBUG("res.completeRequestHandler called");
314                 if (sendResponse(completeRes, streamId) != 0)
315                 {
316                     close();
317                     return;
318                 }
319             });
320         auto asyncResp =
321             std::make_shared<bmcweb::AsyncResp>(std::move(it->second.res));
322         if constexpr (!BMCWEB_INSECURE_DISABLE_AUTH)
323         {
324             thisReq.session = authentication::authenticate(
325                 {}, asyncResp->res, thisReq.method(), thisReq.req, mtlsSession);
326             if (!authentication::isOnAllowlist(thisReq.url().path(),
327                                                thisReq.method()) &&
328                 thisReq.session == nullptr)
329             {
330                 BMCWEB_LOG_WARNING("Authentication failed");
331                 forward_unauthorized::sendUnauthorized(
332                     thisReq.url().encoded_path(),
333                     thisReq.getHeaderValue("X-Requested-With"),
334                     thisReq.getHeaderValue("Accept"), asyncResp->res);
335                 return 0;
336             }
337         }
338         std::string_view expectedEtag =
339             thisReq.getHeaderValue(boost::beast::http::field::if_none_match);
340         BMCWEB_LOG_DEBUG("Setting expected etag {}", expectedEtag);
341         if (!expectedEtag.empty())
342         {
343             asyncResp->res.setExpectedEtag(expectedEtag);
344         }
345         handler->handle(it->second.req, asyncResp);
346         return 0;
347     }
348 
onDataChunkRecvCallback(uint8_t,int32_t streamId,const uint8_t * data,size_t len)349     int onDataChunkRecvCallback(uint8_t /*flags*/, int32_t streamId,
350                                 const uint8_t* data, size_t len)
351     {
352         auto thisStream = streams.find(streamId);
353         if (thisStream == streams.end())
354         {
355             BMCWEB_LOG_ERROR("Unknown stream{}", streamId);
356             close();
357             return -1;
358         }
359 
360         std::optional<bmcweb::HttpBody::reader>& reqReader =
361             thisStream->second.reqReader;
362         if (!reqReader)
363         {
364             reqReader.emplace(
365                 bmcweb::HttpBody::reader(thisStream->second.req->req.base(),
366                                          thisStream->second.req->req.body()));
367         }
368         boost::beast::error_code ec;
369         reqReader->put(boost::asio::const_buffer(data, len), ec);
370         if (ec)
371         {
372             BMCWEB_LOG_CRITICAL("Failed to write payload");
373             return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
374         }
375         return 0;
376     }
377 
onDataChunkRecvStatic(nghttp2_session *,uint8_t flags,int32_t streamId,const uint8_t * data,size_t len,void * userData)378     static int onDataChunkRecvStatic(
379         nghttp2_session* /* session */, uint8_t flags, int32_t streamId,
380         const uint8_t* data, size_t len, void* userData)
381     {
382         BMCWEB_LOG_DEBUG("onDataChunkRecvStatic");
383         if (userData == nullptr)
384         {
385             BMCWEB_LOG_CRITICAL("user data was null?");
386             return NGHTTP2_ERR_CALLBACK_FAILURE;
387         }
388         return userPtrToSelf(userData).onDataChunkRecvCallback(
389             flags, streamId, data, len);
390     }
391 
onFrameRecvCallback(const nghttp2_frame & frame)392     int onFrameRecvCallback(const nghttp2_frame& frame)
393     {
394         BMCWEB_LOG_DEBUG("frame type {}", static_cast<int>(frame.hd.type));
395         switch (frame.hd.type)
396         {
397             case NGHTTP2_DATA:
398             case NGHTTP2_HEADERS:
399                 // Check that the client request has finished
400                 if ((frame.hd.flags & NGHTTP2_FLAG_END_STREAM) != 0)
401                 {
402                     return onRequestRecv(frame.hd.stream_id);
403                 }
404                 break;
405             default:
406                 break;
407         }
408         return 0;
409     }
410 
onFrameRecvCallbackStatic(nghttp2_session *,const nghttp2_frame * frame,void * userData)411     static int onFrameRecvCallbackStatic(nghttp2_session* /* session */,
412                                          const nghttp2_frame* frame,
413                                          void* userData)
414     {
415         BMCWEB_LOG_DEBUG("on_frame_recv_callback.  Frame type {}",
416                          static_cast<int>(frame->hd.type));
417         if (userData == nullptr)
418         {
419             BMCWEB_LOG_CRITICAL("user data was null?");
420             return NGHTTP2_ERR_CALLBACK_FAILURE;
421         }
422         if (frame == nullptr)
423         {
424             BMCWEB_LOG_CRITICAL("frame was null?");
425             return NGHTTP2_ERR_CALLBACK_FAILURE;
426         }
427         return userPtrToSelf(userData).onFrameRecvCallback(*frame);
428     }
429 
userPtrToSelf(void * userData)430     static self_type& userPtrToSelf(void* userData)
431     {
432         // This method exists to keep the unsafe reinterpret cast in one
433         // place.
434         // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
435         return *reinterpret_cast<self_type*>(userData);
436     }
437 
onStreamCloseCallbackStatic(nghttp2_session *,int32_t streamId,uint32_t,void * userData)438     static int onStreamCloseCallbackStatic(nghttp2_session* /* session */,
439                                            int32_t streamId,
440                                            uint32_t /*unused*/, void* userData)
441     {
442         BMCWEB_LOG_DEBUG("on_stream_close_callback stream {}", streamId);
443         if (userData == nullptr)
444         {
445             BMCWEB_LOG_CRITICAL("user data was null?");
446             return NGHTTP2_ERR_CALLBACK_FAILURE;
447         }
448         if (userPtrToSelf(userData).streams.erase(streamId) <= 0)
449         {
450             return -1;
451         }
452         return 0;
453     }
454 
onHeaderCallback(const nghttp2_frame & frame,std::span<const uint8_t> name,std::span<const uint8_t> value)455     int onHeaderCallback(const nghttp2_frame& frame,
456                          std::span<const uint8_t> name,
457                          std::span<const uint8_t> value)
458     {
459         // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
460         std::string_view nameSv(reinterpret_cast<const char*>(name.data()),
461                                 name.size());
462         // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
463         std::string_view valueSv(reinterpret_cast<const char*>(value.data()),
464                                  value.size());
465 
466         BMCWEB_LOG_DEBUG("on_header_callback name: {} value {}", nameSv,
467                          valueSv);
468         if (frame.hd.type != NGHTTP2_HEADERS)
469         {
470             return 0;
471         }
472         if (frame.headers.cat != NGHTTP2_HCAT_REQUEST)
473         {
474             return 0;
475         }
476         auto thisStream = streams.find(frame.hd.stream_id);
477         if (thisStream == streams.end())
478         {
479             BMCWEB_LOG_ERROR("Unknown stream{}", frame.hd.stream_id);
480             close();
481             return -1;
482         }
483 
484         Request& thisReq = *thisStream->second.req;
485 
486         if (nameSv == ":path")
487         {
488             thisReq.target(valueSv);
489         }
490         else if (nameSv == ":method")
491         {
492             boost::beast::http::verb verb =
493                 boost::beast::http::string_to_verb(valueSv);
494             if (verb == boost::beast::http::verb::unknown)
495             {
496                 BMCWEB_LOG_ERROR("Unknown http verb {}", valueSv);
497                 verb = boost::beast::http::verb::trace;
498             }
499             thisReq.method(verb);
500         }
501         else if (nameSv.starts_with(":"))
502         {
503             // Ignore all other http2 headers
504             // :scheme and :authority are other valid http2 fields that might
505             // show up here.
506         }
507         else
508         {
509             thisReq.addHeader(nameSv, valueSv);
510         }
511         return 0;
512     }
513 
onHeaderCallbackStatic(nghttp2_session *,const nghttp2_frame * frame,const uint8_t * name,size_t namelen,const uint8_t * value,size_t vallen,uint8_t,void * userData)514     static int onHeaderCallbackStatic(
515         nghttp2_session* /* session */, const nghttp2_frame* frame,
516         const uint8_t* name, size_t namelen, const uint8_t* value,
517         size_t vallen, uint8_t /* flags */, void* userData)
518     {
519         if (userData == nullptr)
520         {
521             BMCWEB_LOG_CRITICAL("user data was null?");
522             return NGHTTP2_ERR_CALLBACK_FAILURE;
523         }
524         if (frame == nullptr)
525         {
526             BMCWEB_LOG_CRITICAL("frame was null?");
527             return NGHTTP2_ERR_CALLBACK_FAILURE;
528         }
529         if (name == nullptr)
530         {
531             BMCWEB_LOG_CRITICAL("name was null?");
532             return NGHTTP2_ERR_CALLBACK_FAILURE;
533         }
534         if (value == nullptr)
535         {
536             BMCWEB_LOG_CRITICAL("value was null?");
537             return NGHTTP2_ERR_CALLBACK_FAILURE;
538         }
539         return userPtrToSelf(userData).onHeaderCallback(*frame, {name, namelen},
540                                                         {value, vallen});
541     }
542 
onBeginHeadersCallback(const nghttp2_frame & frame)543     int onBeginHeadersCallback(const nghttp2_frame& frame)
544     {
545         if (frame.hd.type == NGHTTP2_HEADERS &&
546             frame.headers.cat == NGHTTP2_HCAT_REQUEST)
547         {
548             BMCWEB_LOG_DEBUG("create stream for id {}", frame.hd.stream_id);
549 
550             streams[frame.hd.stream_id];
551             if (ngSession.setLocalWindowSize(
552                     NGHTTP2_FLAG_NONE, frame.hd.stream_id, 16384 * 32) != 0)
553             {
554                 BMCWEB_LOG_ERROR("Failed to set local window size");
555             }
556         }
557         return 0;
558     }
559 
onBeginHeadersCallbackStatic(nghttp2_session *,const nghttp2_frame * frame,void * userData)560     static int onBeginHeadersCallbackStatic(nghttp2_session* /* session */,
561                                             const nghttp2_frame* frame,
562                                             void* userData)
563     {
564         BMCWEB_LOG_DEBUG("on_begin_headers_callback");
565         if (userData == nullptr)
566         {
567             BMCWEB_LOG_CRITICAL("user data was null?");
568             return NGHTTP2_ERR_CALLBACK_FAILURE;
569         }
570         if (frame == nullptr)
571         {
572             BMCWEB_LOG_CRITICAL("frame was null?");
573             return NGHTTP2_ERR_CALLBACK_FAILURE;
574         }
575         return userPtrToSelf(userData).onBeginHeadersCallback(*frame);
576     }
577 
afterWriteBuffer(const std::shared_ptr<self_type> & self,const boost::system::error_code & ec,size_t sendLength)578     static void afterWriteBuffer(const std::shared_ptr<self_type>& self,
579                                  const boost::system::error_code& ec,
580                                  size_t sendLength)
581     {
582         self->isWriting = false;
583         BMCWEB_LOG_DEBUG("Sent {}", sendLength);
584         if (ec)
585         {
586             self->close();
587             return;
588         }
589         self->writeBuffer();
590     }
591 
writeBuffer()592     void writeBuffer()
593     {
594         if (isWriting)
595         {
596             return;
597         }
598         std::span<const uint8_t> data = ngSession.memSend();
599         if (data.empty())
600         {
601             return;
602         }
603         isWriting = true;
604         if (httpType == HttpType::HTTPS)
605         {
606             boost::asio::async_write(
607                 adaptor, boost::asio::const_buffer(data.data(), data.size()),
608                 std::bind_front(afterWriteBuffer, shared_from_this()));
609         }
610         else if (httpType == HttpType::HTTP)
611         {
612             boost::asio::async_write(
613                 adaptor.next_layer(),
614                 boost::asio::const_buffer(data.data(), data.size()),
615                 std::bind_front(afterWriteBuffer, shared_from_this()));
616         }
617     }
618 
close()619     void close()
620     {
621         adaptor.next_layer().close();
622     }
623 
afterDoRead(const std::shared_ptr<self_type> &,const boost::system::error_code & ec,size_t bytesTransferred)624     void afterDoRead(const std::shared_ptr<self_type>& /*self*/,
625                      const boost::system::error_code& ec,
626                      size_t bytesTransferred)
627     {
628         BMCWEB_LOG_DEBUG("{} async_read_some {} Bytes", logPtr(this),
629                          bytesTransferred);
630 
631         if (ec)
632         {
633             BMCWEB_LOG_ERROR("{} Error while reading: {}", logPtr(this),
634                              ec.message());
635             close();
636             BMCWEB_LOG_DEBUG("{} from read(1)", logPtr(this));
637             return;
638         }
639         std::span<uint8_t> bufferSpan{inBuffer.data(), bytesTransferred};
640 
641         ssize_t readLen = ngSession.memRecv(bufferSpan);
642         if (readLen < 0)
643         {
644             BMCWEB_LOG_ERROR("nghttp2_session_mem_recv returned {}", readLen);
645             close();
646             return;
647         }
648         writeBuffer();
649 
650         doRead();
651     }
652 
doRead()653     void doRead()
654     {
655         BMCWEB_LOG_DEBUG("{} doRead", logPtr(this));
656         if (httpType == HttpType::HTTPS)
657         {
658             adaptor.async_read_some(boost::asio::buffer(inBuffer),
659                                     std::bind_front(&self_type::afterDoRead,
660                                                     this, shared_from_this()));
661         }
662         else if (httpType == HttpType::HTTP)
663         {
664             adaptor.next_layer().async_read_some(
665                 boost::asio::buffer(inBuffer),
666                 std::bind_front(&self_type::afterDoRead, this,
667                                 shared_from_this()));
668         }
669     }
670 
671     // A mapping from http2 stream ID to Stream Data
672     std::map<int32_t, Http2StreamData> streams;
673 
674     std::array<uint8_t, 8192> inBuffer{};
675 
676     HttpType httpType = HttpType::BOTH;
677     boost::asio::ssl::stream<Adaptor> adaptor;
678     bool isWriting = false;
679 
680     nghttp2_session ngSession;
681 
682     Handler* handler;
683     std::function<std::string()>& getCachedDateStr;
684 
685     std::shared_ptr<persistent_data::UserSession> mtlsSession;
686 
687     using std::enable_shared_from_this<
688         HTTP2Connection<Adaptor, Handler>>::shared_from_this;
689 
690     using std::enable_shared_from_this<
691         HTTP2Connection<Adaptor, Handler>>::weak_from_this;
692 };
693 } // namespace crow
694