Update for TFTP using a fixed UDP port

Use the approved environment variable names. Added "tftpdstp" to
allow ports other than 69 per Tolunay Orkun's recommendation.
Patch by Jerry Van Baren, 12 Jan 2005

1 files changed, 11 insertions, 4 deletions

diff --git a/README b/README
index 3b36e50e11..9c3ff3844e 100644
--- 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.