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/*
* Copyright (c) 2017 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 "icnet_ccnx_portal.h"
#define UNSET_CALLBACK 0
#define MAX_ARRAY_SIZE 16000
namespace icnet {
namespace ccnx {
Portal::Portal(std::string forwarder_ip_address, std::string forwarder_port)
: is_running_(true),
clear_(false),
on_interest_callback_(UNSET_CALLBACK),
connector_(io_service_,
forwarder_ip_address,
forwarder_port,
std::bind(&Portal::processIncomingMessages, this, std::placeholders::_1),
served_name_list_) {
io_service_.reset();
}
Portal::~Portal() {
connector_.close();
stopEventsLoop();
clear();
}
void Portal::sendInterest(const Interest &interest,
const OnContentObjectCallback &on_content_object,
const OnInterestTimeoutCallback &on_interest_timeout) {
std::shared_ptr<Interest> _interest = const_cast<Interest &>(interest).shared_from_this();
// Create new message
CCNxMetaMessage *message = ccnxMetaMessage_CreateFromInterest(_interest->getWrappedStructure());
// Send it
connector_.send(message);
clear_ = false;
std::function<void(const boost::system::error_code &)> timer_callback;
PendingInterest *pend_interest = new PendingInterest(_interest, io_service_, on_content_object, on_interest_timeout);
const Name &name = _interest->getName();
pending_interest_hash_table_[name] = std::unique_ptr<PendingInterest>(pend_interest);
timer_callback = [this, name](const boost::system::error_code &ec) {
if (clear_ || !is_running_) {
return;
}
if (ec.value() != boost::system::errc::operation_canceled) {
std::unordered_map<Name, std::unique_ptr<PendingInterest>>::iterator it = pending_interest_hash_table_.find(name);
if (it != pending_interest_hash_table_.end()) {
it->second->getOnTimeoutCallback()(*it->second->getInterest());
} else {
std::cerr << "Timeout on interest already received_! [" << it->second->getInterest()->getName() << "]"
<< std::endl;
}
}
};
pend_interest->startCountdown(timer_callback);
ccnxMetaMessage_Release(&message);
}
void Portal::bind(Name &name, const OnInterestCallback &on_interest_callback) {
on_interest_callback_ = on_interest_callback;
served_name_list_.push_back(name);
work_ = std::shared_ptr<boost::asio::io_service::work>(new boost::asio::io_service::work(io_service_));
connector_.bind(name);
}
void Portal::sendContentObject(const ContentObject &content_object) {
ContentObject &ccnx_data = const_cast<ContentObject &>(content_object);
CCNxMetaMessageStructure *message = ccnxMetaMessage_CreateFromContentObject(ccnx_data.getWrappedStructure());
ccnxContentObject_AssertValid(ccnx_data.getWrappedStructure());
connector_.send(message);
ccnxMetaMessage_Release(&message);
}
void Portal::runEventsLoop() {
if (io_service_.stopped()) {
io_service_.reset(); // ensure that run()/poll() will do some work
}
is_running_ = true;
this->io_service_.run();
}
void Portal::stopEventsLoop() {
is_running_ = false;
work_.reset();
io_service_.stop();
}
void Portal::clear() {
pending_interest_hash_table_.clear();
clear_ = true;
}
void Portal::processInterest(CCNxMetaMessage *response) {
// Interest for a producer
CCNxInterest *interest_ptr = ccnxInterest_Acquire(ccnxMetaMessage_GetInterest(response));
if (on_interest_callback_ != UNSET_CALLBACK) {
Interest interest(interest_ptr);
if (on_interest_callback_) {
on_interest_callback_(interest.getName(), interest);
}
ccnxInterest_Release((CCNxInterest **) &interest_ptr);
}
}
void Portal::processControlMessage(CCNxMetaMessage *response) {
// Control message as response to the route set by a producer
CCNxControl *control_message = ccnxMetaMessage_GetControl(response);
if (ccnxControl_IsACK(control_message)) {
std::cout << "Route set correctly!" << std::endl;
} else {
std::cout << "Failed to set the route." << std::endl;
}
}
void Portal::processContentObject(CCNxMetaMessage *response) {
// Content object for a consumer
CCNxContentObject *content_object = ccnxContentObject_Acquire(ccnxMetaMessage_GetContentObject(response));
CCNxName *n = ccnxContentObject_GetName(content_object);
size_t n_components = ccnxName_GetSegmentCount(n);
CCNxNameSegment *last_segment = ccnxName_GetSegment(n, n_components - 1);
bool has_chunk_number = ccnxNameSegmentNumber_IsValid(last_segment);
PendingInterestHashTable::iterator it = pending_interest_hash_table_.find(Name(n));
if (it != pending_interest_hash_table_.end()) {
std::unique_ptr<PendingInterest> &interest_ptr = it->second;
interest_ptr->cancelTimer();
std::shared_ptr<ContentObject> data_ptr = std::make_shared<ContentObject>(content_object);
if (!interest_ptr->isReceived()) {
interest_ptr->setReceived();
interest_ptr->getOnDataCallback()(*interest_ptr->getInterest(), *data_ptr);
if (!has_chunk_number) {
pending_interest_hash_table_.erase(interest_ptr->getInterest()->getName());
}
}
}
ccnxContentObject_Release((CCNxContentObject **) &content_object);
}
void Portal::processIncomingMessages(CCNxMetaMessage *response) {
if (clear_ || !is_running_) {
return;
}
if (response) {
if (ccnxMetaMessage_IsContentObject(response)) {
processContentObject(response);
} else if (ccnxMetaMessage_IsInterest(response)) {
processInterest(response);
} else if (ccnxMetaMessage_IsControl(response)) {
processControlMessage(response);
}
ccnxMetaMessage_Release(&response);
}
}
boost::asio::io_service &Portal::getIoService() {
return io_service_;
}
} // end namespace ccnx
} // end namespace icnet
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