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authorMauro Sardara <msardara@cisco.com>2020-05-14 20:27:11 +0200
committerMauro Sardara <msardara@cisco.com>2020-05-20 11:07:30 +0200
commita27536f3d1ce6c2f46aef61a29dd1f516644e663 (patch)
treeabcf4c6285dbd824f21095d33293a48d58d74889 /apps/http-proxy/src/http_proxy.cc
parent81fb39606b069fbece973995572fa7f90ea1950a (diff)
[HICN-614] Add client HTTP proxy (TCP->hICN)
Change-Id: Ieaa875edff98404676083bab91233b98ce50c8d0 Signed-off-by: Mauro Sardara <msardara@cisco.com>
Diffstat (limited to 'apps/http-proxy/src/http_proxy.cc')
-rw-r--r--apps/http-proxy/src/http_proxy.cc243
1 files changed, 243 insertions, 0 deletions
diff --git a/apps/http-proxy/src/http_proxy.cc b/apps/http-proxy/src/http_proxy.cc
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+++ b/apps/http-proxy/src/http_proxy.cc
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+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "http_proxy.h"
+
+#include <hicn/transport/core/interest.h>
+#include <hicn/transport/utils/log.h>
+
+#include "utils.h"
+
+namespace transport {
+
+using core::Interest;
+using core::Name;
+using interface::ConsumerCallbacksOptions;
+using interface::ConsumerInterestCallback;
+using interface::ConsumerSocket;
+using interface::TransportProtocolAlgorithms;
+
+class HTTPClientConnectionCallback : interface::ConsumerSocket::ReadCallback {
+ public:
+ HTTPClientConnectionCallback(TcpReceiver& tcp_receiver,
+ utils::EventThread& thread,
+ const std::string& prefix,
+ const std::string& ipv6_first_word)
+ : tcp_receiver_(tcp_receiver),
+ thread_(thread),
+ prefix_hash_(generatePrefix(prefix, ipv6_first_word)),
+ consumer_(TransportProtocolAlgorithms::RAAQM, thread_.getIoService()),
+ session_(nullptr),
+ current_size_(0) {
+ consumer_.setSocketOption(ConsumerCallbacksOptions::READ_CALLBACK, this);
+ consumer_.setSocketOption(
+ ConsumerCallbacksOptions::INTEREST_OUTPUT,
+ (ConsumerInterestCallback)std::bind(
+ &HTTPClientConnectionCallback::processLeavingInterest, this,
+ std::placeholders::_1, std::placeholders::_2));
+ consumer_.connect();
+ }
+
+ void setHttpSession(asio::ip::tcp::socket&& socket) {
+ session_ = std::make_unique<HTTPSession>(
+ std::move(socket),
+ std::bind(&HTTPClientConnectionCallback::readDataFromTcp, this,
+ std::placeholders::_1, std::placeholders::_2,
+ std::placeholders::_3, std::placeholders::_4),
+ [this](asio::ip::tcp::socket& socket) -> bool {
+ try {
+ std::string remote_address =
+ socket.remote_endpoint().address().to_string();
+ std::uint16_t remote_port = socket.remote_endpoint().port();
+ TRANSPORT_LOGD("Client %s:%d disconnected.", remote_address.c_str(),
+ remote_port);
+ } catch (std::system_error& e) {
+ // Do nothing
+ }
+
+ consumer_.stop();
+ tcp_receiver_.onClientDisconnect(this);
+ return false;
+ });
+
+ current_size_ = 0;
+ }
+
+ private:
+ void consumeNextRequest() {
+ if (request_buffer_queue_.size() == 0) {
+ // No additiona requests to process.
+ return;
+ }
+
+ auto& buffer = request_buffer_queue_.front();
+ uint64_t request_hash =
+ utils::hash::fnv64_buf(buffer->data(), buffer->length());
+
+ std::stringstream name;
+ name << prefix_hash_.substr(0, prefix_hash_.length() - 2);
+
+ for (uint16_t* word = (uint16_t*)&request_hash;
+ std::size_t(word) <
+ (std::size_t(&request_hash) + sizeof(request_hash));
+ word++) {
+ name << ":" << std::hex << *word;
+ }
+
+ name << "|0";
+
+ // Non blocking consume :)
+ consumer_.consume(Name(name.str()));
+ }
+
+ // tcp callbacks
+
+ void readDataFromTcp(const uint8_t* data, std::size_t size, bool is_last,
+ bool headers) {
+ if (headers) {
+ // Add the request to the request queue
+ tmp_buffer_ = utils::MemBuf::copyBuffer(data, size);
+ } else {
+ // Append payload chunk to last request added. Here we are assuming
+ // HTTP/1.1.
+ tmp_buffer_->prependChain(utils::MemBuf::copyBuffer(data, size));
+ }
+
+ current_size_ += size;
+
+ if (is_last) {
+ TRANSPORT_LOGD(
+ "Request received: %s",
+ std::string((const char*)tmp_buffer_->data(), tmp_buffer_->length())
+ .c_str());
+ if (current_size_ < 1400) {
+ request_buffer_queue_.emplace_back(std::move(tmp_buffer_));
+ } else {
+ TRANSPORT_LOGE("Ignoring client request due to size (%zu) > 1400.",
+ current_size_);
+ session_->close();
+ current_size_ = 0;
+ return;
+ }
+
+ if (!consumer_.isRunning()) {
+ TRANSPORT_LOGD(
+ "Consumer stopped, triggering consume from TCP session handler..");
+ consumeNextRequest();
+ }
+
+ current_size_ = 0;
+ }
+ }
+
+ // hicn callbacks
+
+ void processLeavingInterest(interface::ConsumerSocket& c,
+ const core::Interest& interest) {
+ if (interest.payloadSize() == 0) {
+ Interest& int2 = const_cast<Interest&>(interest);
+ int2.appendPayload(request_buffer_queue_.front()->clone());
+ }
+ }
+
+ bool isBufferMovable() noexcept { return true; }
+ void getReadBuffer(uint8_t** application_buffer, size_t* max_length) {}
+ void readDataAvailable(size_t length) noexcept {}
+ size_t maxBufferSize() const { return 64 * 1024; }
+
+ void readBufferAvailable(std::unique_ptr<utils::MemBuf>&& buffer) noexcept {
+ // Response received. Send it back to client
+ auto _buffer = buffer.release();
+ TRANSPORT_LOGD("From hicn: %zu bytes.", _buffer->length());
+ session_->send(_buffer, []() {});
+ }
+
+ void readError(const std::error_code ec) noexcept {
+ TRANSPORT_LOGE("Error reading from hicn consumer socket. Closing session.");
+ session_->close();
+ }
+
+ void readSuccess(std::size_t total_size) noexcept {
+ request_buffer_queue_.pop_front();
+ consumeNextRequest();
+ }
+
+ private:
+ TcpReceiver& tcp_receiver_;
+ utils::EventThread& thread_;
+ std::string prefix_hash_;
+ ConsumerSocket consumer_;
+ std::unique_ptr<HTTPSession> session_;
+ std::deque<std::unique_ptr<utils::MemBuf>> request_buffer_queue_;
+ std::unique_ptr<utils::MemBuf> tmp_buffer_;
+ std::size_t current_size_;
+};
+
+TcpReceiver::TcpReceiver(std::uint16_t port, const std::string& prefix,
+ const std::string& ipv6_first_word)
+ : Receiver(),
+ listener_(thread_.getIoService(), port,
+ std::bind(&TcpReceiver::onNewConnection, this,
+ std::placeholders::_1)),
+ prefix_(prefix),
+ ipv6_first_word_(ipv6_first_word) {
+ for (int i = 0; i < 10; i++) {
+ http_clients_.emplace_back(new HTTPClientConnectionCallback(
+ *this, thread_, prefix, ipv6_first_word));
+ }
+}
+
+void TcpReceiver::onClientDisconnect(HTTPClientConnectionCallback* client) {
+ http_clients_.emplace_front(client);
+ used_http_clients_.erase(client);
+}
+
+void TcpReceiver::onNewConnection(asio::ip::tcp::socket&& socket) {
+ if (http_clients_.size() == 0) {
+ // Create new HTTPClientConnectionCallback
+ TRANSPORT_LOGD("Creating new HTTPClientConnectionCallback.");
+ http_clients_.emplace_back(new HTTPClientConnectionCallback(
+ *this, thread_, prefix_, ipv6_first_word_));
+ }
+
+ // Get new HTTPClientConnectionCallback
+ HTTPClientConnectionCallback* c = http_clients_.front();
+ http_clients_.pop_front();
+
+ // Set http session
+ c->setHttpSession(std::move(socket));
+
+ // Move it to used clients
+ used_http_clients_.insert(c);
+}
+
+HTTPProxy::HTTPProxy(ClientParams& params, std::size_t n_thread) {
+ for (uint16_t i = 0; i < n_thread; i++) {
+ // icn_receivers_.emplace_back(std::make_unique<IcnReceiver>(icn_params));
+ receivers_.emplace_back(std::make_unique<TcpReceiver>(
+ params.tcp_listen_port, params.prefix, params.first_ipv6_word));
+ }
+}
+
+HTTPProxy::HTTPProxy(ServerParams& params, std::size_t n_thread) {
+ for (uint16_t i = 0; i < n_thread; i++) {
+ receivers_.emplace_back(std::make_unique<IcnReceiver>(
+ params.prefix, params.first_ipv6_word, params.origin_address,
+ params.origin_port, params.cache_size, params.mtu,
+ params.content_lifetime, params.manifest));
+ }
+}
+
+} // namespace transport