[U-Boot] [PATCH] tftp: adjust settings to be suitable for 100Mbit ethernet
Pavel Machek
pavel at denx.de
Tue Aug 18 14:34:26 CEST 2015
Adjust timouts and retry counts to be suitable for loaded ethernet
network. With 5 seconds timeout, 10 retries maximum, tftp is
impossible even on local network with single full-speed TCP
connection.
100msec timeout should be suitable for most networks tftp is used on,
that is local ethernets. Timeout count really needs to be way higher,
as lost packets are normal when TCP is running over the same network.
Enforce 10msec minimum.
Signed-off-by: Pavel Machek <pavel at denx.de>
diff --git a/net/tftp.c b/net/tftp.c
index 0a2c533..c5ea3f2 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -18,10 +18,10 @@
/* Well known TFTP port # */
#define WELL_KNOWN_PORT 69
/* Millisecs to timeout for lost pkt */
-#define TIMEOUT 5000UL
+#define TIMEOUT 100UL
#ifndef CONFIG_NET_RETRY_COUNT
/* # of timeouts before giving up */
-# define TIMEOUT_COUNT 10
+# define TIMEOUT_COUNT 1000
#else
# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
#endif
@@ -703,11 +703,11 @@ void TftpStart(enum proto_t protocol)
if (ep != NULL)
TftpTimeoutMSecs = simple_strtol(ep, NULL, 10);
- if (TftpTimeoutMSecs < 1000) {
+ if (TftpTimeoutMSecs < 10) {
printf("TFTP timeout (%ld ms) too low, "
- "set minimum = 1000 ms\n",
+ "set minimum = 10 ms\n",
TftpTimeoutMSecs);
- TftpTimeoutMSecs = 1000;
+ TftpTimeoutMSecs = 10;
}
debug("TFTP blocksize = %i, timeout = %ld ms\n",
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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