Update for TFTP using a fixed UDP port

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 3b36e50e11d5995fb2b36dbebaf3b1a097aec4f5..9c3ff3844e66aa430044775429aa45cc9abd638c 100644 (file)
--- a/README
+++ b/README
@@ -1490,12 +1490,16 @@ The following options need to be configured:
 - TFTP Fixed UDP Port:
                CONFIG_TFTP_PORT
 
-               If this is defined, the environment variable tftpport
+               If this is defined, the environment variable tftpsrcp
                is used to supply the TFTP UDP source port value.
-               If tftpport isn't defined, the normal pseudo-random port
+               If tftpsrcp isn't defined, the normal pseudo-random port
                number generator is used.
 
-               The purpose for this is to allow a TFTP server to
+               Also, the environment variable tftpdstp is used to supply
+               the TFTP UDP destination port value.  If tftpdstp isn't
+               defined, the normal port 69 is used.
+
+               The purpose for tftpsrcp is to allow a TFTP server to
                blindly start the TFTP transfer using the pre-configured
                target IP address and UDP port. This has the effect of
                "punching through" the (Windows XP) firewall, allowing
@@ -2468,9 +2472,12 @@ Some configuration options can be set using Environment Variables:
                  Useful on scripts which control the retry operation
                  themselves.
 
-  tftpport     - If this is set, the value is used for TFTP's
+  tftpsrcport  - If this is set, the value is used for TFTP's
                  UDP source port.
 
+  tftpdstport  - If this is set, the value is used for TFTP's UDP
+                 destination port instead of the Well Know Port 69.
+
    vlan                - When set to a value < 4095 the traffic over
                  ethernet is encapsulated/received over 802.1q
                  VLAN tagged frames.