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2021-07-27[efi] Record cached ProxyDHCPOFFER and PXEBSACK, if presentMichael Brown1-45/+130
Commit cd3de55 ("[efi] Record cached DHCPACK from loaded image's device handle, if present") added the ability for a chainloaded UEFI iPXE to reuse an IPv4 address and DHCP options previously obtained by a built-in PXE stack, without needing to perform a second DHCP request. Extend this to also record the cached ProxyDHCPOFFER and PXEBSACK obtained from the EFI_PXE_BASE_CODE_PROTOCOL instance installed on the loaded image's device handle, if present. This allows a chainloaded UEFI iPXE to reuse a boot filename or other options that were provided via a ProxyDHCP or PXE boot server mechanism, rather than by standard DHCP. Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
2021-02-17[pxe] Split out platform-independent portions of cachedhcp.cMichael Brown1-0/+158
Split out the portions of cachedhcp.c that can be shared between BIOS and UEFI (both of which can provide a buffer containing a previously obtained DHCP packet, and neither of which provide a means to determine the length of this DHCP packet). Signed-off-by: Michael Brown <mcb30@ipxe.org>