1 files changed, 8 insertions, 0 deletions

diff --git a/src/net.h b/src/net.h
index bcd0b2a..e4cfa69 100644
--- a/src/net.h
+++ b/src/net.h
@@ -120,6 +120,13 @@ static const unsigned int MAX_CONNECTIONS = 125;
 // this long regardless of what is still buffered.
 static const int64        DISCONNECT_DRAIN_SECS    = 60;
 
+// How long a pool may go without hearing a height from ANY peer before it
+// stops issuing jobs. Long enough that ordinary peer churn and a quiet
+// handshake window do not trip it; short enough that a deaf pool cannot build
+// more than a few blocks of private fork before it is stopped. Heights
+// 3966-4085 -- 120 blocks, 5890.50 BTF -- were mined in exactly this state.
+static const int64        BTF_NO_PEER_HEIGHT_MAX_SECS = 20 * 60;
+
 // Send a ping after this long with nothing to say, so a peer running the
 // inactivity check above does not mistake a quiet node for a dead one. Must
 // stay well under BTF_RECV_TIMEOUT_SECS.
@@ -160,6 +167,7 @@ extern int nBestHeight;
 // has told us anything. Median rather than maximum so one peer claiming an
 // absurd height cannot move it.
 int GetPeerMedianHeight();
+int64 GetPeerHeightAgeSecs();
 
 // Lightweight .btf churn accounting. These counters are diagnostics only: they
 // let an operator tell stale descriptors, relay pairing failures, and paired