From ecb0ccd9c260701183bc8d35966e65e6a2feb2f6 Mon Sep 17 00:00:00 2001
From: Wolfgang Denk <wd@pollux.(none)>
Date: Sat, 24 Sep 2005 22:37:32 +0200
Subject: 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

---
 net/tftp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'net/tftp.c')

diff --git a/net/tftp.c b/net/tftp.c
index 03a002767a..a7c246a7de 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -313,6 +313,10 @@ TftpTimeout (void)
 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 @@ TftpStart (void)
 	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 */
-- 
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