[U-Boot-Users] PATCH for U-Boot 1.3.3 DHCP fails with netgear WGR614v6

[Ben Warren]

Robin Getz wrote:
> I was trying out U-Boot 1.1.3 with a new(er) router netgear WGR614v6 - 
> firmware version V2.0.19_1.0.19NA, on a Blackfin BF537-STAMP.
>
> http://kbserver.netgear.com/products/wgr614v6.asp
>
> and found that dhcp fails :( 
>
> bfin> dhcp
> BOOTP broadcast 1
> BOOTP broadcast 2
> BOOTP broadcast 3
> BOOTP broadcast 4
> BOOTP broadcast 5
>
> Retry count exceeded; starting again
>
> When turning on some more verbose debug messages (in the net driver & in the 
> network code, not all of which exists in U-Boot release or trunk), we can see 
> exactly what is going on...
>
> =============================
> bfin> dhcp
> Eth_halt: ......
> Eth_init: ......
> BOOTP broadcast 1
> setting transaction ID to 3268fe22
> BFIN EMAC send: length = 343
> BFIN EMAC rx: length = 552
> packet received
> packet received
> Receive from protocol 0x800
> Got IP
> len=308, v=45
> passing packet len= 280
> DHCPHandler: got packet: (src=67, dst=68, len=280) state: 3
> Filtering pkt = 0
> DHCPHandler: got DHCP packet: (src=67, dst=68, len=280) state: 3
> DHCP: state=SELECTING bp_file: ""
> TRANSITIONING TO REQUESTING STATE
> IP was: 0.0.0.0
> IP now: 192.168.0.9
> Bootfile:
> DhcpSendRequestPkt: Sending DHCPREQUEST
> Transmitting DHCPREQUEST packet: len = 343
> BFIN EMAC send: length = 343
> BFIN EMAC rx: length = 64
> packet received
> packet received
> Receive from protocol 0x806
> Got ARP
> Got ARP REQUEST, for 192.168.0.9, return our MAC
> BFIN EMAC send: length = 42
> BFIN EMAC rx: length = 552
> packet received
> packet received
> Receive from protocol 0x800
> Got IP
> len=272, v=45
> passing packet len= 244
> DHCPHandler: got packet: (src=67, dst=68, len=244) state: 4
> Filtering pkt = 0
> DHCPHandler: got DHCP packet: (src=67, dst=68, len=244) state: 4
> DHCP State: REQUESTING
> you just got DHCP NAKed
>
> ===================
>
> What is happening, is that the server offers an IP number to U-Boot 
> (192.168.0.9), U-Boot does a DHCPREQUEST, the server does a ARP asking 
> for "who has 192.168.0.9", and U-Boot responds "I do" (This is the problem). 
> The server then sends the requester (U-Boot) a DHCP NAK saying that someone 
> else on the network is already using that address.
>
>   
This seems goofy.  Have you tried your fix with other DHCP servers to 
verify that it works?  If so, which ones?  I unfortunately can't try 
anything right now but will play around a bit tonight.

regards,
Ben