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Initial work on Broadcast Domain Discovery

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Discover peers on the same broadcast domain/LAN
Implements own node announcement
Implements others announcement listening
Implements API to get notifiend when other nodes get discovered
Implements API to get discovered nodes
Add discovered peer locator to rsPeers if it is already friend

Yet a bunch of things to do to take full advantage of this new
implementation
This commit is contained in:
Gioacchino Mazzurco 2019-04-12 02:53:39 +02:00
parent 276328dd91
commit 7b38c1c75a
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15 changed files with 583 additions and 70 deletions
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libretroshare/src/retroshare/rsbroadcastdiscovery.h Normal file
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/*******************************************************************************
* RetroShare Broadcast Domain Discovery *
* *
* Copyright (C) 2019 Gioacchino Mazzurco <gio@altermundi.net> *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Affero General Public License as *
* published by the Free Software Foundation, either version 3 of the *
* License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Affero General Public License for more details. *
* *
* You should have received a copy of the GNU Affero General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
*******************************************************************************/
#pragma once
#include <functional>
#include <memory>
#include <vector>
#include <string>
#include "retroshare/rsids.h"
#include "retroshare/rstypes.h"
#include "serialiser/rsserializable.h"
#include "util/rstime.h"
#include "util/rsurl.h"
#include "util/rsmemory.h"
class RsBroadcastDiscovery;
/**
* Pointer to global instance of RsBroadcastDiscovery service implementation
* @jsonapi{development}
*/
extern std::shared_ptr<RsBroadcastDiscovery> rsBroadcastDiscovery;
struct RsBroadcastDiscoveryResult : RsSerializable
{
PGPFingerprintType mPgpFingerprint;
RsPeerId mSslId;
std::string mProfileName;
RsUrl locator;
void serial_process( RsGenericSerializer::SerializeJob j,
RsGenericSerializer::SerializeContext& ctx) override
{
RS_SERIAL_PROCESS(mPgpFingerprint);
RS_SERIAL_PROCESS(mSslId);
RS_SERIAL_PROCESS(mProfileName);
RS_SERIAL_PROCESS(locator);
}
};
class RsBroadcastDiscovery
{
public:
virtual ~RsBroadcastDiscovery();
/**
* @brief Get potential peers that have been discovered up until now
* @jsonapi{development}
* @return vector containing discovered peers, may be empty.
*/
virtual std::vector<RsBroadcastDiscoveryResult> getDiscoveredPeers() = 0;
/**
* @brief registerPeersDiscoveredEventHandler
* @jsonapi{development}
* @param multiCallback function that will be called each time a potential
* peer is discovered
* @param[in] maxWait maximum wait time in seconds for discovery results,
* passing std::numeric_limits<rstime_t>::max() means wait forever.
* @param[out] errorMessage Optional storage for error message, meaningful
* only on failure.
* @return false on error, true otherwise
*/
virtual bool registerPeersDiscoveredEventHandler(
const std::function<void (const RsBroadcastDiscoveryResult& result)>&
multiCallback,
rstime_t maxWait = 300,
std::string& errorMessage = RS_DEFAULT_STORAGE_PARAM(std::string) ) = 0;
};