ring: purge timer before we unmap tx ring buffers

If we unmap TX ring buffers and still have timer shots that trigger
the kernel to traverse the TX_RING, it can send out random crap in
some situations. Prevent this by destroying the timer and flush the
TX_RING first in wait mode.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/ring_tx.h b/ring_tx.h
index 7970045..769f27e 100644
--- a/ring_tx.h
+++ b/ring_tx.h
@@ -37,4 +37,9 @@ static inline int pull_and_flush_tx_ring(int sock)
 	return sendto(sock, NULL, 0, MSG_DONTWAIT, NULL, 0);
 }
 
+static inline int pull_and_flush_tx_ring_wait(int sock)
+{
+	return sendto(sock, NULL, 0, 0, NULL, 0);
+}
+
 #endif /* TX_RING_H */