tftpput command

Synopsis

tftpput address size [[hostIPaddr:]filename]

Description

The tftpput command is used to transfer a file to a TFTP server.

By default the destination port is 69 and the source port is pseudo-random. If CONFIG_TFTP_PORT=y, the environment variable tftpsrcp can be used to set the source port and the environment variable tftpdstp can be used to set the destination port.

address: memory address where the data starts
size: number of bytes to be transferred
hostIPaddr: IP address of the TFTP server, defaults to the value of environment variable serverip
filename: path of the file to be written. If not provided, the client’s IP address is used to construct a default file name, e.g. C0.A8.00.28.img for IP address 192.168.0.40.

Example

In the example the following steps are executed:

setup client network address
load a file from the SD-card
send the file via TFTP to a server

=> setenv autoload no
=> dhcp
BOOTP broadcast 1
DHCP client bound to address 192.168.1.40 (7 ms)
=> load mmc 0:1 $loadaddr test.txt
260096 bytes read in 13 ms (19.1 MiB/s)
=> tftpput $loadaddr $filesize 192.168.1.3:upload/test.txt
Using ethernet@1c30000 device
TFTP to server 192.168.1.3; our IP address is 192.168.1.40
Filename 'upload/test.txt'.
Save address: 0x42000000
Save size:    0x3f800
Saving: #################
     4.4 MiB/s
done
Bytes transferred = 260096 (3f800 hex)
=>

Configuration

The command is only available if CONFIG_CMD_TFTPPUT=y.

CONFIG_TFTP_BLOCKSIZE defines the size of the TFTP blocks sent. It defaults to 1468 matching an ethernet MTU of 1500.

If CONFIG_TFTP_PORT=y, the environment variables tftpsrcp and tftpdstp can be used to set the source and the destination ports.

CONFIG_TFTP_WINDOWSIZE can be used to set the TFTP window size of transmits after which an ACK response is required. The window size defaults to 1.

If CONFIG_TFTP_TSIZE=y, the progress bar is limited to 50 ‘#’ characters. Otherwise an ‘#’ is written per UDP package which may decrease performance.

Return value

The return value $? is 0 (true) on success and 1 (false) otherwise.