Add form parameter

  param [--params <params>] <key> <value>

  params
  param mac ${net0/mac}
  param uuid ${uuid}
  param asset ${asset}
  chain http://boot.ipxe.org/demo/boot.php##params

Add a form parameter with the specified key/value pair. If no form parameter list is specified, the default (unnamed) form parameter list will be used.

• params
• iPXE scripting guide
• List of all iPXE commands

This command is available only when the build option PARAM_CMD is enabled.

The most common use for form parameter lists is to generate HTTP POST requests. You can use a POST request to send large quantities of data to a web server by appending “##params” to the HTTP URI. For example, to send a complete PCI device listing to a web server:

  #!ipxe
  
  params
  :pciscan pciscan addr || goto pciscan_done
    param pcidev ${pci/${addr}.0.2}:${pci/${addr}.2.2}
    goto pciscan
  :pciscan_done
  chain http://192.168.0.1/boot/pcilist.php##params

You must create the form parameter list using the params command before attempting to create a form parameter using the param command.