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The UEFI model for wireless network configuration is somewhat underdefined. At the time of writing, the EDK2 "UEFI WiFi Connection Manager" driver provides only one way to configure wireless network credentials, which is to enter them interactively via an HII form. Credentials are not stored (or exposed via any protocol interface), and so any temporary disconnection from the wireless network will inevitably leave the interface in an unusable state that cannot be recovered without user intervention. Experimentation shows that at least some wireless network drivers (observed with an HP Elitebook 840 G10) will disconnect from the wireless network when the SNP Shutdown() method is called, or if the device is not polled sufficiently frequently to maintain its association to the network. We therefore inhibit calls to Shutdown() and Stop() for any such SNP protocol interfaces, and mark our network device as insomniac so that it will be polled even when closed. Note that we need to inhibit not only our own calls to Shutdown() and Stop(), but also those that will be attempted by MnpDxe when we disconnect it from the SNP handle. We do this by patching the installed SNP protocol interface structure to modify the Shutdown() and Stop() method pointers, which is ugly but unavoidable. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org