exttrack.h

/*
 *  exttrack.h
 *
 *  Defines and classes for working with external trackers
 *
 *  Created by Arno Bakker
 *  Copyright 2013-2016 Vrije Universiteit Amsterdam. All rights reserved.
 */
#ifndef SWIFT_EXTTRACK_H_
#define SWIFT_EXTTRACK_H_

namespace swift {

#define EXTTRACK_EVENT_STARTED		"started"
#define EXTTRACK_EVENT_COMPLETED	"completed"
#define EXTTRACK_EVENT_STOPPED		"stopped"
#define EXTTRACK_EVENT_WORKING		""

struct Address;
typedef std::vector<Address>	peeraddrs_t;

/** External tracker */
typedef void (*exttrack_peerlist_callback_t)(int td, std::string result, uint32_t interval, peeraddrs_t peerlist);


class ContentTransfer;

struct ExtTrackCallbackRecord
{
    ExtTrackCallbackRecord(int td, exttrack_peerlist_callback_t callback) : td_(td), callback_(callback) {}
    int td_;
    exttrack_peerlist_callback_t	callback_;
};

class ExternalTrackerClient
{
  public:
    ExternalTrackerClient(std::string url);
    ~ExternalTrackerClient();
    /** (Re)Registers at tracker and adds returned peer addresses to peerlist */
    int Contact(ContentTransfer *transfer, std::string event, exttrack_peerlist_callback_t callback);
    bool GetReportedComplete() { return reported_complete_; }
    tint GetReportLastTime() { return report_last_time_; }
    void SetReportInterval(uint32_t interval) { report_interval_ = interval; }
    uint32_t GetReportInterval() { return report_interval_; }
  protected:
    std::string 	url_;
    uint8_t 		*peerid_;
    tint		report_last_time_; // tint
    uint32_t 		report_interval_; // seconds
    bool		reported_complete_;

    /** IP in myaddr currently unused */
    std::string CreateQuery(ContentTransfer *transfer, Address myaddr, std::string event);
    int HTTPConnect(std::string query,ExtTrackCallbackRecord *callbackrec);
};

}

#endif /* SWIFT_EXTTRACK_H_ */