From e3d3d7f94657336e09cb161f1ee3e645aaaeab6c Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Sun, 30 Aug 2026 20:57:15 -0400
Subject: [PATCH] handle lifetime field from datagram tracker connect response

---
 libi2pd_client/TorrentsTunnel.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libi2pd_client/TorrentsTunnel.cpp b/libi2pd_client/TorrentsTunnel.cpp
index 8ac78ca1..3b933e45 100644
--- a/libi2pd_client/TorrentsTunnel.cpp
+++ b/libi2pd_client/TorrentsTunnel.cpp
@@ -887,12 +887,18 @@ namespace torrents
 			return;
 		}
 		uint64_t connectionID = bufbe64toh (buf + 4);
+		int lifetime = DATAGRAM_TRACKER_CONNECTION_EXPIRATION;
+		if (len >= 14)
+		{
+			lifetime = std::max (bufbe16toh (buf + 12)*1000, DATAGRAM_TRACKER_CONNECTION_EXPIRATION);
+			LogPrint (eLogDebug, "TorrentsTunnel: Datagram tracker connection lifetime set to ", lifetime/1000, " seconds");
+		}
 		auto [trackerID, fromPort, torrent, ts] = it->second;
 		if (trackerID < m_Trackers.size ())
 		{
 			auto& [announce, connID, connExpiration, connFromPort] = m_Trackers[trackerID];
 			connID = connectionID;
-			connExpiration = i2p::util::GetMonotonicMilliseconds () + DATAGRAM_TRACKER_CONNECTION_EXPIRATION;
+			connExpiration = i2p::util::GetMonotonicMilliseconds () + lifetime;
 			connFromPort = fromPort;
 		}
 		m_DatragramTrackerTransactions.erase (it);