Allow to force TFTP to use a fixed UDP port
(Add a configuration option CONFIG_TFTP_PORT and optional env variable tftpport)
Patch by Jerry Van Baren, 10 Jan 2005
diff --git a/net/tftp.c b/net/tftp.c
index 03a0027..a7c246a 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -313,6 +313,10 @@
void
TftpStart (void)
{
+#ifdef CONFIG_TFTP_PORT
+ char *ep; /* Environment pointer */
+#endif
+
if (BootFile[0] == '\0') {
sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
NetOurIP & 0xFF,
@@ -364,7 +368,13 @@
TftpServerPort = WELL_KNOWN_PORT;
TftpTimeoutCount = 0;
TftpState = STATE_RRQ;
+ /* Use a pseudo-random port unless a specific port is set */
TftpOurPort = 1024 + (get_timer(0) % 3072);
+#ifdef CONFIG_TFTP_PORT
+ if ((ep = getenv("tftpport")) != NULL) {
+ TftpOurPort= simple_strtol(ep, NULL, 10);
+ }
+#endif
TftpBlock = 0;
/* zero out server ether in case the server ip has changed */