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- /** @file
- *
- * PXE FILE API
- *
- */
-
- #include <stdlib.h>
- #include <stdio.h>
- #include <errno.h>
- #include <byteswap.h>
- #include <gpxe/uaccess.h>
- #include <gpxe/posix_io.h>
- #include <gpxe/features.h>
- #include <pxe.h>
-
- /*
- * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- FEATURE ( FEATURE_MISC, "PXEXT", DHCP_EB_FEATURE_PXE_EXT, 1 );
-
- /**
- * FILE OPEN
- *
- * @v file_open Pointer to a struct s_PXENV_FILE_OPEN
- * @v s_PXENV_FILE_OPEN::FileName URL of file to open
- * @ret #PXENV_EXIT_SUCCESS File was opened
- * @ret #PXENV_EXIT_FAILURE File was not opened
- * @ret s_PXENV_FILE_OPEN::Status PXE status code
- * @ret s_PXENV_FILE_OPEN::FileHandle Handle of opened file
- *
- */
- PXENV_EXIT_t pxenv_file_open ( struct s_PXENV_FILE_OPEN *file_open ) {
- userptr_t filename;
- size_t filename_len;
- int fd;
-
- DBG ( "PXENV_FILE_OPEN" );
-
- /* Copy name from external program, and open it */
- filename = real_to_user ( file_open->FileName.segment,
- file_open->FileName.offset );
- filename_len = strlen_user ( filename, 0 );
- {
- char uri_string[ filename_len + 1 ];
-
- copy_from_user ( uri_string, filename, 0,
- sizeof ( uri_string ) );
- DBG ( " %s", uri_string );
- fd = open ( uri_string );
- }
-
- if ( fd < 0 ) {
- file_open->Status = PXENV_STATUS ( fd );
- return PXENV_EXIT_FAILURE;
- }
-
- DBG ( " as file %d", fd );
-
- file_open->FileHandle = fd;
- file_open->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /**
- * FILE CLOSE
- *
- * @v file_close Pointer to a struct s_PXENV_FILE_CLOSE
- * @v s_PXENV_FILE_CLOSE::FileHandle File handle
- * @ret #PXENV_EXIT_SUCCESS File was closed
- * @ret #PXENV_EXIT_FAILURE File was not closed
- * @ret s_PXENV_FILE_CLOSE::Status PXE status code
- *
- */
- PXENV_EXIT_t pxenv_file_close ( struct s_PXENV_FILE_CLOSE *file_close ) {
-
- DBG ( "PXENV_FILE_CLOSE %d", file_close->FileHandle );
-
- close ( file_close->FileHandle );
- file_close->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /**
- * FILE SELECT
- *
- * @v file_select Pointer to a struct s_PXENV_FILE_SELECT
- * @v s_PXENV_FILE_SELECT::FileHandle File handle
- * @ret #PXENV_EXIT_SUCCESS File has been checked for readiness
- * @ret #PXENV_EXIT_FAILURE File has not been checked for readiness
- * @ret s_PXENV_FILE_SELECT::Status PXE status code
- * @ret s_PXENV_FILE_SELECT::Ready Indication of readiness
- *
- */
- PXENV_EXIT_t pxenv_file_select ( struct s_PXENV_FILE_SELECT *file_select ) {
- fd_set fdset;
- int ready;
-
- DBG ( "PXENV_FILE_SELECT %d", file_select->FileHandle );
-
- FD_ZERO ( &fdset );
- FD_SET ( file_select->FileHandle, &fdset );
- if ( ( ready = select ( &fdset, 0 ) ) < 0 ) {
- file_select->Status = PXENV_STATUS ( ready );
- return PXENV_EXIT_FAILURE;
- }
-
- file_select->Ready = ( ready ? RDY_READ : 0 );
- file_select->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /**
- * FILE READ
- *
- * @v file_read Pointer to a struct s_PXENV_FILE_READ
- * @v s_PXENV_FILE_READ::FileHandle File handle
- * @v s_PXENV_FILE_READ::BufferSize Size of data buffer
- * @v s_PXENV_FILE_READ::Buffer Data buffer
- * @ret #PXENV_EXIT_SUCCESS Data has been read from file
- * @ret #PXENV_EXIT_FAILURE Data has not been read from file
- * @ret s_PXENV_FILE_READ::Status PXE status code
- * @ret s_PXENV_FILE_READ::Ready Indication of readiness
- * @ret s_PXENV_FILE_READ::BufferSize Length of data read
- *
- */
- PXENV_EXIT_t pxenv_file_read ( struct s_PXENV_FILE_READ *file_read ) {
- userptr_t buffer;
- ssize_t len;
-
- DBG ( "PXENV_FILE_READ %d to %04x:%04x+%04x", file_read->FileHandle,
- file_read->Buffer.segment, file_read->Buffer.offset,
- file_read->BufferSize );
-
- buffer = real_to_user ( file_read->Buffer.segment,
- file_read->Buffer.offset );
- if ( ( len = read_user ( file_read->FileHandle, buffer, 0,
- file_read->BufferSize ) ) < 0 ) {
- file_read->Status = PXENV_STATUS ( len );
- return PXENV_EXIT_FAILURE;
- }
-
- DBG ( " read %04zx", ( ( size_t ) len ) );
-
- file_read->BufferSize = len;
- file_read->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
-
- /**
- * GET FILE SIZE
- *
- * @v get_file_size Pointer to a struct s_PXENV_GET_FILE_SIZE
- * @v s_PXENV_GET_FILE_SIZE::FileHandle File handle
- * @ret #PXENV_EXIT_SUCCESS File size has been determined
- * @ret #PXENV_EXIT_FAILURE File size has not been determined
- * @ret s_PXENV_GET_FILE_SIZE::Status PXE status code
- * @ret s_PXENV_GET_FILE_SIZE::FileSize Size of file
- */
- PXENV_EXIT_t pxenv_get_file_size ( struct s_PXENV_GET_FILE_SIZE
- *get_file_size ) {
- ssize_t filesize;
-
- DBG ( "PXENV_GET_FILE_SIZE %d", get_file_size->FileHandle );
-
- filesize = fsize ( get_file_size->FileHandle );
- if ( filesize < 0 ) {
- get_file_size->Status = PXENV_STATUS ( filesize );
- return PXENV_EXIT_FAILURE;
- }
-
- DBG ( " is %zd", ( ( size_t ) filesize ) );
-
- get_file_size->FileSize = filesize;
- get_file_size->Status = PXENV_STATUS_SUCCESS;
- return PXENV_EXIT_SUCCESS;
- }
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