* experimental sending keepalive packets (hope this can reduce user's auto-disconnect issue)

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@4512 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 8 insertions, 1 deletions

diff --git a/mbbsd/mbbsd.c b/mbbsd/mbbsd.c
index 0fe860e1..c6d9f182 100644
--- a/mbbsd/mbbsd.c
+++ b/mbbsd/mbbsd.c
@@ -1462,8 +1462,15 @@ set_connection_opt(int sock)
     const struct linger lin = {0};
 
     // keep alive: server will check target connection (default 2 hours)
-    const int on = 1;
+    const int on = 1; 
     setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void*)&on, sizeof(on));
+
+#if defined(SOL_TCP) && defined(TCP_KEEPIDLE)
+    {
+	const int idle = 300*2; // experimental, minimal keep alive check
+	setsockopt(sock, SOL_TCP,    TCP_KEEPIDLE, (void*)idle, sizeof(idle));
+    }
+#endif
    
     // fast close
     setsockopt(sock, SOL_SOCKET, SO_LINGER, &lin, sizeof(lin));