/*
* Copyright (C) 2006 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.
*/
#include <stdint.h>
#include <malloc.h>
#include <gpxe/pkbuff.h>
/** @file
* Packet buffers
/**
* Allocate packet buffer
* @v len Required length of buffer
* @ret pkb Packet buffer, or NULL if none available
struct pk_buff * alloc_pkb ( size_t len ) {
struct pk_buff *pkb = NULL;
/* Allocate memory for buffer plus descriptor */
pkb = malloc ( sizeof ( *pkb ) + len );
if ( pkb ) {
pkb->head = pkb->data = pkb->tail = ( void * ) ( pkb + 1 );
pkb->end = pkb->head + len;
}
return pkb;
* Free packet buffer
* @v pkb Packet buffer, or NULL
void free_pkb ( struct pk_buff *pkb ) {
free ( pkb );