transmission/libtransmission/peer-mgr.h

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// This file Copyright © 2007-2023 Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#pragma once
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
#include <cstddef> // size_t
#include <cstdint> // uint8_t, uint64_t
#include <string>
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#include <utility>
#include <vector>
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#ifdef _WIN32
#include <winsock2.h> /* struct in_addr */
#endif
#include "net.h" /* tr_address */
#include "peer-common.h"
#include "peer-socket.h"
/**
* @addtogroup peers Peers
* @{
*/
class tr_peerIo;
class tr_peerMsgs;
class tr_swarm;
struct UTPSocket;
struct peer_atom;
struct tr_peerMgr;
struct tr_peer_stat;
struct tr_torrent;
/* added_f's bitwise-or'ed flags */
enum
{
/* true if the peer supports encryption */
ADDED_F_ENCRYPTION_FLAG = 1,
/* true if the peer is a seed or partial seed */
ADDED_F_SEED_FLAG = 2,
/* true if the peer supports µTP */
ADDED_F_UTP_FLAGS = 4,
/* true if the peer has holepunch support */
ADDED_F_HOLEPUNCH = 8,
/* true if the peer telling us about this peer
* initiated the connection (implying that it is connectible) */
ADDED_F_CONNECTABLE = 16
};
struct tr_pex
{
tr_pex() = default;
tr_pex(tr_address addr_in, tr_port port_in, uint8_t flags_in = {})
: addr{ addr_in }
, port{ port_in }
, flags{ flags_in }
{
}
template<typename OutputIt>
OutputIt to_compact_ipv4(OutputIt out) const
{
return this->addr.to_compact_ipv4(out, this->port);
}
template<typename OutputIt>
OutputIt to_compact_ipv6(OutputIt out) const
{
return this->addr.to_compact_ipv6(out, this->port);
}
template<typename OutputIt>
static OutputIt to_compact_ipv4(OutputIt out, tr_pex const* pex, size_t n_pex)
{
for (size_t i = 0; i < n_pex; ++i)
{
out = pex[i].to_compact_ipv4(out);
}
return out;
}
template<typename OutputIt>
static OutputIt to_compact_ipv6(OutputIt out, tr_pex const* pex, size_t n_pex)
{
for (size_t i = 0; i < n_pex; ++i)
{
out = pex[i].to_compact_ipv6(out);
}
return out;
}
[[nodiscard]] static std::vector<tr_pex> from_compact_ipv4(
void const* compact,
size_t compact_len,
uint8_t const* added_f,
size_t added_f_len);
[[nodiscard]] static std::vector<tr_pex> from_compact_ipv6(
void const* compact,
size_t compact_len,
uint8_t const* added_f,
size_t added_f_len);
template<typename OutputIt>
[[nodiscard]] OutputIt display_name(OutputIt out) const
{
return addr.display_name(out, port);
}
[[nodiscard]] std::string display_name() const
{
return addr.display_name(port);
}
[[nodiscard]] int compare(tr_pex const& that) const noexcept // <=>
{
if (auto const i = addr.compare(that.addr); i != 0)
{
return i;
}
if (port != that.port)
{
return port < that.port ? -1 : 1;
}
return 0;
}
[[nodiscard]] bool operator==(tr_pex const& that) const noexcept
{
return compare(that) == 0;
}
[[nodiscard]] bool operator<(tr_pex const& that) const noexcept
{
return compare(that) < 0;
}
[[nodiscard]] bool is_valid_for_peers() const noexcept
{
return addr.is_valid_for_peers(port);
}
tr_address addr = {};
tr_port port = {}; /* this field is in network byte order */
uint8_t flags = 0;
};
constexpr bool tr_isPex(tr_pex const* pex)
{
return pex != nullptr && pex->addr.is_valid();
}
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[[nodiscard]] tr_peerMgr* tr_peerMgrNew(tr_session* session);
void tr_peerMgrFree(tr_peerMgr* manager);
void tr_peerMgrSetUtpSupported(tr_torrent* tor, tr_address const& addr);
void tr_peerMgrSetUtpFailed(tr_torrent* tor, tr_address const& addr, bool failed);
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[[nodiscard]] std::vector<tr_block_span_t> tr_peerMgrGetNextRequests(tr_torrent* torrent, tr_peer const* peer, size_t numwant);
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[[nodiscard]] bool tr_peerMgrDidPeerRequest(tr_torrent const* torrent, tr_peer const* peer, tr_block_index_t block);
void tr_peerMgrClientSentRequests(tr_torrent* torrent, tr_peer* peer, tr_block_span_t span);
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[[nodiscard]] size_t tr_peerMgrCountActiveRequestsToPeer(tr_torrent const* torrent, tr_peer const* peer);
void tr_peerMgrAddIncoming(tr_peerMgr* manager, tr_peer_socket&& socket);
size_t tr_peerMgrAddPex(tr_torrent* tor, uint8_t from, tr_pex const* pex, size_t n_pex);
void tr_peerMgrSetSwarmIsAllSeeds(tr_torrent* tor);
enum
{
TR_PEERS_CONNECTED,
TR_PEERS_INTERESTING
};
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[[nodiscard]] std::vector<tr_pex> tr_peerMgrGetPeers(
tr_torrent const* tor,
uint8_t address_type,
uint8_t peer_list_mode,
size_t max_peer_count);
void tr_peerMgrStartTorrent(tr_torrent* tor);
void tr_peerMgrStopTorrent(tr_torrent* tor);
void tr_peerMgrAddTorrent(tr_peerMgr* manager, struct tr_torrent* tor);
void tr_peerMgrRemoveTorrent(tr_torrent* tor);
// return the number of connected peers that have `piece`, or -1 if we already have it
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[[nodiscard]] int8_t tr_peerMgrPieceAvailability(tr_torrent const* tor, tr_piece_index_t piece);
void tr_peerMgrTorrentAvailability(tr_torrent const* tor, int8_t* tab, unsigned int n_tabs);
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[[nodiscard]] uint64_t tr_peerMgrGetDesiredAvailable(tr_torrent const* tor);
void tr_peerMgrOnTorrentGotMetainfo(tr_torrent* tor);
void tr_peerMgrOnBlocklistChanged(tr_peerMgr* mgr);
[[nodiscard]] struct tr_peer_stat* tr_peerMgrPeerStats(tr_torrent const* tor, size_t* setme_count);
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[[nodiscard]] tr_webseed_view tr_peerMgrWebseed(tr_torrent const* tor, size_t i);
void tr_peerMgrClearInterest(tr_torrent* tor);
void tr_peerMgrGotBadPiece(tr_torrent* tor, tr_piece_index_t piece_index);
void tr_peerMgrPieceCompleted(tr_torrent* tor, tr_piece_index_t pieceIndex);
/* @} */