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.

                                                            {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        unsigned int vlan;
        union {
                EFI_PXE_BASE_CODE_PROTOCOL *pxe;
                void *interface;
        } pxe;
        EFI_PXE_BASE_CODE_MODE *mode;
        EFI_STATUS efirc;
        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 ( ( efirc = bs->OpenProtocol ( device,
                                          &efi_pxe_base_code_protocol_guid,
                                          &pxe.interface, efi_image_handle,
                                          NULL,
                                          EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
                rc = -EEFI ( efirc );
                DBGC ( device, "EFI %s has no PXE base code instance: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                goto err_open;
        }

        /* Do not attempt to cache IPv6 packets */
        mode = pxe.pxe->Mode;
        if ( mode->UsingIpv6 ) {
                rc = -ENOTSUP;
                DBGC ( device, "EFI %s has IPv6 PXE base code\n",
                       efi_handle_name ( device ) );
                goto err_ipv6;
        }

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

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

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

        /* Success */
        rc = 0;

 err_pxebs:
 err_proxydhcp:
 err_dhcpack:
 err_ipv6:
        bs->CloseProtocol ( device, &efi_pxe_base_code_protocol_guid,
                            efi_image_handle, NULL );
 err_open:
        return rc;
}

References EFI_SYSTEM_TABLE::BootServices, cached_dhcpack, cached_proxydhcp, cached_pxebs, cachedhcp_record(), EFI_BOOT_SERVICES::CloseProtocol, DBGC, EFI_PXE_BASE_CODE_MODE::DhcpAck, EFI_PXE_BASE_CODE_MODE::DhcpAckReceived, EEFI, efi_handle_name(), efi_image_handle, EFI_OPEN_PROTOCOL_GET_PROTOCOL, efi_path_vlan(), efi_pxe_base_code_protocol_guid, efi_systab, ENOTSUP, NULL, EFI_BOOT_SERVICES::OpenProtocol, EFI_PXE_BASE_CODE_MODE::ProxyOffer, EFI_PXE_BASE_CODE_MODE::ProxyOfferReceived, EFI_PXE_BASE_CODE_MODE::PxeReply, EFI_PXE_BASE_CODE_MODE::PxeReplyReceived, rc, strerror(), EFI_PXE_BASE_CODE_MODE::UsingIpv6, and virt_to_user().

Referenced by efi_init_application().