Mark socket disconnected on tcp_send_or_shutdown_error

The socket left lingering due to {exit_on_close, false} will accept writes
in a confusing way, returning either enotconn or blocking. This fix allows
socket to know that it has been closed recently, and new writes won't pass.

1 files changed, 6 insertions, 0 deletions

diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 2d2bd80783..1649b07ad9 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -4378,6 +4378,12 @@ static void desc_close(inet_descriptor* desc)
 	desc->event = INVALID_EVENT; /* closed by stop_select callback */
 	desc->s = INVALID_SOCKET;
 	desc->event_mask = 0;
+
+	/* mark as disconnected in case when socket is left lingering due to
+	 * {exit_on_close, false} option in gen_tcp socket creation. Next
+	 * write to socket should produce {error, enotconn} and send a
+	 * message {tcp_error,#Port<>,econnreset} */
+	desc->state &= ~INET_STATE_CONNECTED;
     }
 }