From 9739946cc5b616c026d433bd07d193cf452ddea0 Mon Sep 17 00:00:00 2001
From: Robin Getz <rgetz@blackfin.uclinux.org>
Date: Mon, 8 Mar 2010 14:07:00 -0500
Subject: [PATCH] ./net/net.c - make Microsoft dns servers happy with
random_port() numbers
For some reason, (which I can't find any documentation on), if U-Boot
gives a port number higher than 17500 to a Microsoft DNS server, the
server will reply to port 17500, and U-Boot will ignore things (since
that isn't the port it asked the DNS server to reply to).
This fixes that by ensuring the random port number is less than 17500.
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
---
net/net.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/net.c b/net/net.c
index 7d2220d48de..cda731986b7 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1872,11 +1872,13 @@ void copy_filename (char *dst, char *src, int size)
#if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
/*
- * make port a little random, but use something trivial to compute
+ * make port a little random (1024-17407)
+ * This keeps the math somewhat trivial to compute, and seems to work with
+ * all supported protocols/clients/servers
*/
unsigned int random_port(void)
{
- return 1024 + (get_timer(0) % 0x8000);;
+ return 1024 + (get_timer(0) % 0x4000);
}
#endif
--
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