efi_cachedhcp.c File Reference

EFI cached DHCP packet. More...

#include <string.h>
#include <errno.h>
#include <ipxe/cachedhcp.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_path.h>
#include <ipxe/efi/efi_cachedhcp.h>
#include <ipxe/efi/Protocol/PxeBaseCode.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
int	efi_cachedhcp_record (EFI_HANDLE device, EFI_DEVICE_PATH_PROTOCOL *path)
	Record cached DHCP packet. More...

Detailed Description

EFI cached DHCP packet.

Definition in file efi_cachedhcp.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

efi_cachedhcp_record()

int efi_cachedhcp_record	(	EFI_HANDLE	device,
		EFI_DEVICE_PATH_PROTOCOL *	path
	)

Record cached DHCP packet.

Parameters

device	Device handle
path	Device path

Return values

rc	Return status code

Definition at line 47 of file efi_cachedhcp.c.

                                                            {
        unsigned int vlan;
        EFI_PXE_BASE_CODE_PROTOCOL *pxe;
        EFI_PXE_BASE_CODE_MODE *mode;
        int rc;

        /* Get VLAN tag, if any */
        vlan = efi_path_vlan ( path );

        /* Look for a PXE base code instance on the image's device handle */
        if ( ( rc = efi_open ( device, &efi_pxe_base_code_protocol_guid,
                               &pxe ) ) != 0 ) {
                DBGC ( device, "EFI %s has no PXE base code instance: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }

        /* Do not attempt to cache IPv6 packets */
        mode = pxe->Mode;
        if ( mode->UsingIpv6 ) {
                DBGC ( device, "EFI %s has IPv6 PXE base code\n",
                       efi_handle_name ( device ) );
                return -ENOTSUP;
        }

        /* Record DHCPACK, if present */
        if ( mode->DhcpAckReceived &&
             ( ( rc = cachedhcp_record ( &cached_dhcpack, vlan, &mode->DhcpAck,
                                         sizeof ( mode->DhcpAck ) ) ) != 0 ) ) {
                DBGC ( device, "EFI %s could not record DHCPACK: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }

        /* Record ProxyDHCPOFFER, if present */
        if ( mode->ProxyOfferReceived &&
             ( ( rc = cachedhcp_record ( &cached_proxydhcp, vlan,
                                         &mode->ProxyOffer,
                                         sizeof ( mode->ProxyOffer ) ) ) != 0)){
                DBGC ( device, "EFI %s could not record ProxyDHCPOFFER: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }

        /* Record PxeBSACK, if present */
        if ( mode->PxeReplyReceived &&
             ( ( rc = cachedhcp_record ( &cached_pxebs, vlan, &mode->PxeReply,
                                         sizeof ( mode->PxeReply ) ) ) != 0 )){
                DBGC ( device, "EFI %s could not record PXEBSACK: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }

        return 0;
}

References cached_dhcpack, cached_proxydhcp, cached_pxebs, cachedhcp_record(), DBGC, efi_handle_name(), efi_open, efi_path_vlan(), efi_pxe_base_code_protocol_guid, ENOTSUP, mode, _EFI_PXE_BASE_CODE_PROTOCOL::Mode, rc, and strerror().

Referenced by efi_init_application().