How can i build a tftp server in u-boot?

Hi smalllight,

> if the u-boot have a tftp server, i can download image file more easily.

...<snip>...

> who can tell me How can i add a tftp server in the u-boot?

This would be inappropriate -- u-boot is a bootp/dhcp/tftp client ... a bootloader, not a server.

If you want to avoid manually entering the commands, setup the u-boot "autoboot" to

automatically download (and execute) your image when your board boots.

--Scott

thank you for you reply.

In tha fact, I have update the u-boot sourse, my u-boot can choice the run model between tftp and run the kernel img in the flash.

when the u-boot run in tftp model, I will set a default IP, and download a default file in the default server,eg. 192.168.168.100 image.rom

so if i want to download the image file, i must change my PC&#39;s IP address to th default and change my image file name to default one. this is trouble.

so I want to add a tftp server in u-boot. In the case,I can download my image file by tftp command in the PC.

can you give some advise?

Hi smalllight,

> so if i want to download the image file, i must change my PC&#39;s IP address to th

> default and change my image file name to default one. this is trouble.

> so I want to add a tftp server in u-boot. In the case,I can download my image

> file by tftp command in the PC.

You must be a glutton for punishment ;-)

I don&#39;t understand why you have to change the IP address of your PC. Just update

the u-boot environment variable &#39;serverip&#39;. Regardless, if you want to add a tftp

server to u-boot, please feel free to do so.

However, I would recommend you simply run a dhcp/bootp server and let

u-boot download the image automatically (or via autoboot script). If you&#39;re using

Linux, you can use the standard dhcpd/tftpd. If you&#39;re using windoze I

recommend tftpd32:

http://tftpd32.jounin.net (http://tftpd32.jounin.net)

Regards,

--Scott

Hi smcnutt!

thank you for you help.

my english is very poor, I don&#39;t discribe my problem clearly.

why do i must change my PC ip to download the image file? the reason as follon:

first, i don&#39;t want to use the command line in u-boot.

second,Maybe,I download the image file in diffrent PC

for example,the ip of my embed board is 192.168.168.1

I set the serverip=192.168.168.100

now if the ip of my pc is 192.168.168.99

in this case, if i want to download my image file, i must use the command line of u-boot to change the env serverip or i change the ip of my pc to 192.168.168.100

,or i will no way to download my image file.

if i have a tftf server in u-boot. i can input the command "tftp -i 192.168.168.1 put image.rom" in the cmd in my pc.

do you understand?

Hi smalllight,

> my english is very poor, I don&#39;t discribe my problem clearly.

Your english is fine ... and I understand your problem clearly -- I just don&#39;t

agree with your proposed solution :-)

> first, i don&#39;t want to use the command line in u-boot.

You don&#39;t have to ... use the autoboot feature.

> second,Maybe,I download the image file in diffrent PC

And that is exactly the problem (plus others) that DHCP/BOOTP & TFTP successfully

solved many years ago ... and continues to solve today. u-boot fully supports DHCP/BOOTP & TFTP.

> in this case, if i want to download my image file, i must use the command line of

> u-boot to change the env serverip or i change the ip of my pc to 192.168.168.100

> ,or i will no way to download my image file.

Again, I disagree. Regardless, you have at least two choices:

1. get tftpd32: http://tftpd32.jounin.net (http://tftpd32.jounin.net)

This is what I recommend.

2. implement a tftp server in u-boot

Feel free to implement the tftp server in u-boot -- but realize that you will be

re-inventing the wheel ;-)

Regards,

--Scott

Hi,smcnutt

thank you for your help, I change the tftp client of u-boot to a tftp server.

I can download the image file in any PC.

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originally posted by smalllight@May 10 2006, 06:54 AM

hi,smcnutt

thank you for your help, i change the tftp client of u-boot to a tftp server.

i can download the image file in any pc.

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Hi smalllight,

could you please explain how you did so.

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Hi smalllight,

could you please explain how you did so.

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Hi, MFM

In the fact,the tftp server is very similar with a tftp client

In the u-boot, there are no the code about WRQ.

if a tftp client want transport a file to tftp server.

it will send a WRQ to tftpserver,the tftp server will send a ACK to client when the receive the WRQ packet.

then the client will transport the fill 512 bytes in once.

when the server receive the data packey,it send a ACK packet to client.

if the data length is smaller than 512 bytes, the file transport success.

so I add some code to ask the WRQ packet in the function TftpHandle

and change the TftpOurPort to WELL_KNOWN_PORT and you must Save the Client IP when you receive the ARP packet.

Before your work,you should read the tftp protcol document.