More --timeout improvements, especially for the receiving side:

- The receiver now sends keep-alive messages to the generator
  when it is actively doing work and hasn't sent anything
  recently.  This ensures that the generator won't timeout
  if the receiver is working hard.
- The perform_io() code has improved keep-alive participation.
- Allow the sender to send some keep-alive messages, which
  ensures that if it is in a lull, it can probe the socket.

1 files changed, 4 insertions, 0 deletions

diff --git a/receiver.c b/receiver.c
index e8fa3d16..6688dda7 100644
--- a/receiver.c
+++ b/receiver.c
@@ -48,6 +48,7 @@ extern int keep_partial;
 extern int checksum_len;
 extern int checksum_seed;
 extern int inplace;
+extern int allowed_lull;
 extern int delay_updates;
 extern mode_t orig_umask;
 extern struct stats stats;
@@ -254,6 +255,9 @@ static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
 		if (INFO_GTE(PROGRESS, 1))
 			show_progress(offset, total_size);
 
+		if (allowed_lull)
+			maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
+
 		if (i > 0) {
 			if (DEBUG_GTE(DELTASUM, 3)) {
 				rprintf(FINFO,"data recv %d at %s\n",