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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>
This commit is contained in:
Brian Rzycki 2012-09-11 09:22:53 +00:00 committed by Joe Hershberger
parent a655938a93
commit ee0f60df0b
1 changed files with 2 additions and 0 deletions
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2
net/bootp.c
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@ -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));