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/*====================================================================*
*
* Copyright (c) 2013 Qualcomm Atheros, Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted (subject to the limitations
* in the disclaimer below) provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* * Neither the name of Qualcomm Atheros nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
* GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
* COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*--------------------------------------------------------------------*/
/*====================================================================*
*
* signed ReadFMI (struct plc * plc, uint8_t MMV, uint16_t MMTYPE);
*
* plc.h
*
* read a fragmented message and return a pointer to a buffer that
* contains the concatenated message fragments; the buffer address
* is returned in plc->content; the calling function must free the
* buffer when done; buffer length is computed from the number of
* fragments returned in the FMI field of the first fragment;
*
* Contributor(s):
* Charles Maier
* Nathaniel Houghton
*
*--------------------------------------------------------------------*/
#ifndef READFMI_SOURCE
#define READFMI_SOURCE
#include <stdint.h>
#include <stdlib.h>
#include <memory.h>
#include "../tools/memory.h"
#include "../tools/number.h"
#include "../tools/error.h"
#include "../plc/plc.h"
signed ReadFMI (struct plc * plc, uint8_t MMV, uint16_t MMTYPE)
{
if (ReadMME (plc, MMV, MMTYPE) > 0)
{
struct homeplug * homeplug = (struct homeplug *)(plc->message);
unsigned count = ((homeplug->homeplug.FMID >> 0) & 0x0F);
unsigned extra = ((homeplug->homeplug.FMID >> 4) & 0x0F);
unsigned length = sizeof (* homeplug) + extra * sizeof (homeplug->content);
if ((plc->content = malloc (length)))
{
signed offset = plc->packetsize;
memcpy (plc->content, homeplug, offset);
while (count < extra)
{
if (ReadMME (plc, MMV, MMTYPE) <= 0)
{
free (plc->content);
plc->content = NULL;
return (- 1);
}
count = ((homeplug->homeplug.FMID >> 0) & 0x0F);
extra = ((homeplug->homeplug.FMID >> 4) & 0x0F);
plc->packetsize -= sizeof (struct ethernet_hdr);
plc->packetsize -= sizeof (struct homeplug_fmi);
memcpy ((uint8_t *)(plc->content) + offset, homeplug->content, plc->packetsize);
offset += plc->packetsize;
}
plc->packetsize = offset;
}
else
{
error (1, errno, "%s", __func__);
}
}
return (plc->packetsize);
}
#endif
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