vsftpd/0025-Improve-local_max_rate-option.patch

From 386db86fe865fb552b1867af4bf4b78dbf9080cf Mon Sep 17 00:00:00 2001
From: Martin Sehnoutka <msehnout@redhat.com>
Date: Thu, 17 Nov 2016 12:44:26 +0100
Subject: [PATCH 25/33] Improve local_max_rate option.

Now it should work as expected.
---
 ftpdataio.c | 14 +++++++-------
 main.c      |  2 +-
 session.h   |  3 ++-
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/ftpdataio.c b/ftpdataio.c
index 3e4e9c9..00f9021 100644
--- a/ftpdataio.c
+++ b/ftpdataio.c
@@ -249,7 +249,7 @@ handle_io(int retval, int fd, void* p_private)
 {
   long curr_sec;
   long curr_usec;
-  unsigned int bw_rate;
+  unsigned long bw_rate;
   double elapsed;
   double pause_time;
   double rate_ratio;
@@ -276,19 +276,16 @@ handle_io(int retval, int fd, void* p_private)
   {
     elapsed = (double) 0.01;
   }
-  bw_rate = (unsigned int) ((double) retval / elapsed);
-  if (bw_rate <= p_sess->bw_rate_max)
+  p_sess->bw_retval += retval;
+  bw_rate = (unsigned long) ((double) p_sess->bw_retval / elapsed);
+  if (bw_rate <= p_sess->bw_rate_max || p_sess->bw_retval < (unsigned long)(10*retval))
   {
-    p_sess->bw_send_start_sec = curr_sec;
-    p_sess->bw_send_start_usec = curr_usec;
     return;
   }
   /* Tut! Rate exceeded, calculate a pause to bring things back into line */
   rate_ratio = (double) bw_rate / (double) p_sess->bw_rate_max;
   pause_time = (rate_ratio - (double) 1) * elapsed;
   vsf_sysutil_sleep(pause_time);
-  p_sess->bw_send_start_sec = vsf_sysutil_get_time_sec();
-  p_sess->bw_send_start_usec = vsf_sysutil_get_time_usec();
 }
 
 int
@@ -441,6 +438,9 @@ struct vsf_transfer_ret
 vsf_ftpdataio_transfer_file(struct vsf_session* p_sess, int remote_fd,
                             int file_fd, int is_recv, int is_ascii)
 {
+  p_sess->bw_send_start_sec = vsf_sysutil_get_time_sec();
+  p_sess->bw_send_start_usec = vsf_sysutil_get_time_usec();
+  p_sess->bw_retval = 0;
   if (!is_recv)
   {
     if (is_ascii || p_sess->data_use_ssl)
diff --git a/main.c b/main.c
index eaba265..f1e2f69 100644
--- a/main.c
+++ b/main.c
@@ -40,7 +40,7 @@ main(int argc, const char* argv[])
     /* Control connection */
     0, 0, 0, 0, 0,
     /* Data connection */
-    -1, 0, -1, 0, 0, 0, 0,
+    -1, 0, -1, 0, 0, 0, 0, 0,
     /* Login */
     1, 0, INIT_MYSTR, INIT_MYSTR,
     /* Protocol state */
diff --git a/session.h b/session.h
index 956bfb7..3e8fdd5 100644
--- a/session.h
+++ b/session.h
@@ -29,9 +29,10 @@ struct vsf_session
   struct vsf_sysutil_sockaddr* p_port_sockaddr;
   int data_fd;
   int data_progress;
-  unsigned int bw_rate_max;
+  unsigned long bw_rate_max;
   long bw_send_start_sec;
   long bw_send_start_usec;
+  unsigned long bw_retval;
 
   /* Details of the login */
   int is_anonymous;
-- 
2.7.4