[U-Boot] [PATCH] Quietly ignore DHCP Option 28 (Broadcast Address)

[Brian Rzycki]

Some DHCP servers (notably dnsmasq) always transmit DHCP Option 28,
Broadcast Address as specified in RFC 2132. Without this patch u-boot
displays the warning:
  *** Unhandled DHCP Option in OFFER/ACK: 28

The patch suppresses the warning and ignores DHCP Option 28. There is
no environment variable to set the broadcast address into and if for
some reason u-boot needs the broadcast it can be calculated from
ipaddr and netmask.

Signed-off-by: Brian Rzycki <bmr at freescale.com>
---
 net/bootp.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/bootp.c b/net/bootp.c
index 87e30ab..8df9fec 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -728,6 +728,8 @@ static void DhcpOptionsProcess(uchar *popt, struct Bootp_t *bp)
 			memcpy(&NetOurRootPath, popt + 2, size);
 			NetOurRootPath[size] = 0;
 			break;
+		case 28:	/* Ignore Broadcast Address Option */
+			break;
 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
 		case 42:	/* NTP server IP */
 			NetCopyIP(&NetNtpServerIP, (popt + 2));
-- 
1.7.9.7