From: Brian Rzycki <bmr@freescale.com>
Date: Tue, 11 Sep 2012 09:22:53 +0000 (+0000)
Subject: net: Quietly ignore DHCP Option 28 (Broadcast Address)
X-Git-Tag: v2012.10-rc2~12^2
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=ee0f60df0b71092cd632fc6651f4157a2d252598;p=oweals%2Fu-boot.git

net: Quietly ignore DHCP Option 28 (Broadcast Address)

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@freescale.com>
---

diff --git a/net/bootp.c b/net/bootp.c
index c9b8349b36..661e371063 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));