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limit number of pieces and metaInfo size

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orignal
2026-09-18 14:17:06 -04:00
parent 3061fbdeb8
commit ccf65110dc
2 changed files with 24 additions and 4 deletions
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libi2pd_client/Torrents.cpp
+22 -3
View File
@@ -503,7 +503,7 @@ namespace torrents
{
if ((size_t)value < MIN_PIECE_LENGTH || (size_t)value > MAX_PIECE_LENGTH)
{
LogPrint (eLogError, "Torrents: invalid piece length ", value);
LogPrint (eLogError, "Torrents: Invalid piece length ", value);
value = 0;
}
m_PieceLength = value;
@@ -517,7 +517,18 @@ namespace torrents
m_Pieces.swap (tmp);
}
if (m_PieceLength > 0 && m_Length > 0)
m_Pieces.reserve (m_Length/m_PieceLength + 1);
{
auto d = lldiv (m_Length, m_PieceLength);
size_t numPieces = d.quot;
if (d.rem > 0) numPieces++;
if (numPieces <= MAX_NUM_TORRENT_PIECES)
m_Pieces.reserve (numPieces);
else
{
LogPrint (eLogError, "Torrents: Too many pieces ", numPieces);
m_Error = eTorrentErrorMalformedMetaInfo;
}
}
else
m_Error = eTorrentErrorMalformedMetaInfo;
return ParsePieces (buf);
@@ -2053,7 +2064,15 @@ namespace torrents
else if (key == "metadata_size")
{
auto [s, l] = ExtractInteger (buf);
if (l) m_RemoteMetadataSize = s;
if (l)
{
if (s < 0 || (size_t)s > MAX_NUM_TORRENT_PIECES*SHA_DIGEST_LENGTH)
{
LogPrint (eLogError, "Torrents: Invalid metadata_size ", s);
s = 0;
}
m_RemoteMetadataSize = s;
}
return l;
}
else if (key == "reqq")
libi2pd_client/Torrents.h
+2 -1
View File
@@ -38,7 +38,8 @@ namespace torrents
constexpr size_t REQUEST_BLOCK_SIZE = 16384;
constexpr size_t MIN_PIECE_LENGTH = 16*1024; // 16K
constexpr size_t MAX_PIECE_LENGTH = 64*1024*1024; // 64M
constexpr size_t MAX_TORRENT_LENGTH = 1024LL*1024*1024*1024*1024; // 1P
constexpr size_t MAX_NUM_TORRENT_PIECES = 1024*1024; // 1M
constexpr size_t MAX_TORRENT_LENGTH = MAX_PIECE_LENGTH*MAX_NUM_TORRENT_PIECES; // 64T
constexpr uint16_t TORRENT_PORT = 6881; // not used by required by protocol
constexpr int MIN_TRACKER_REQUESTS_INTERVAL = 15000; // in milliseconds
constexpr size_t PEER_CONNECTION_RECEIVE_BUFFER_SIZE = 65535;