/*====================================================================*
*
* 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 UnwantedMessage (void const * memory, size_t extent, uint8_t MMV, uint16_t MMTYPE);
*
* mme.h
*
* return true if memory does not contains a Qualcomm Atheros message
* of the specified version and type; the message version determines
* the location of the OUI field; messages with MMV = 1 have an FMI
* used to track multi-part confirmation counts; out of order counts
* are treated as an error;
*
* constant __WHYNOT__ displays reason for message rejection;
*
* batch is the fragment group identifier taken from the fragment
* frame;
*
* total is the number of fragements in the group taken from the
* fragment frame;
*
* index is the fragment identifier from the fragment frame;
*
* count is the number of fragments received so far;
*
*
* Contributor(s):
* Charles Maier <cmaier@qca.qualcomm.com>
* Matthieu Poullet <m.poullet@avm.de>
*
*--------------------------------------------------------------------*/
#ifndef UNWANTEDMESSAGE_SOURCE
#define UNWANTEDMESSAGE_SOURCE
#include <stdint.h>
#include <memory.h>
#include "../tools/endian.h"
#include "../tools/error.h"
#include "../mme/mme.h"
signed UnwantedMessage (void const * memory, size_t extent, uint8_t MMV, uint16_t MMTYPE)
{
extern const byte localcast [ETHER_ADDR_LEN];
// struct message * message = (struct message *)(memory);
struct homeplug * homeplug = (struct homeplug *)(memory);
if (!extent)
{
return (-1);
}
if (extent < (ETHER_MIN_LEN - ETHER_CRC_LEN))
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Ethernet Frame Size: Received " SIZE_T_SPEC " bytes but need at least %d", extent, ETHER_MIN_LEN - ETHER_CRC_LEN);
#endif
return (-1);
}
if (extent > (ETHER_MAX_LEN))
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Ethernet Frame Size: Received " SIZE_T_SPEC " bytes but need at most %d", extent, ETHER_MAX_LEN);
#endif
return (-1);
}
if (ntohs (homeplug->ethernet.MTYPE) != ETH_P_HPAV)
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Ethernet Frame Type: Received %04X while waiting for %04X", ntohs (homeplug->ethernet.MTYPE), ETH_P_HPAV);
#endif
return (-1);
}
if (homeplug->homeplug.MMV != MMV)
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Message Version: Received %02X but expected %02X", homeplug->homeplug.MMV, MMV);
#endif
return (-1);
}
if (homeplug->homeplug.MMV == 0)
{
struct qualcomm_hdr * qualcomm = (struct qualcomm_hdr *)(&homeplug->homeplug);
if (LE16TOH (qualcomm->MMTYPE) != MMTYPE)
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Message Type: Received %04X while waiting for %04X", LE16TOH (qualcomm->MMTYPE), MMTYPE);
#endif
return (-1);
}
if ((MMTYPE < VS_MMTYPE_MIN) || (MMTYPE > VS_MMTYPE_MAX))
{
}
else if (memcmp (localcast, qualcomm->OUI, sizeof (qualcomm->OUI)))
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Message Vendor");
#endif
return (-1);
}
}
if (homeplug->homeplug.MMV == 1)
{
struct qualcomm_fmi * qualcomm = (struct qualcomm_fmi *)(&homeplug->homeplug);
#if FMI
static unsigned total = 0;
static unsigned index = 0;
static unsigned count = 0;
#endif
if (LE16TOH (qualcomm->MMTYPE) != MMTYPE)
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Message Type: Received %04X while waiting for %04X", LE16TOH (qualcomm->MMTYPE), MMTYPE);
#endif
return (-1);
}
#if FMI
index = qualcomm->FMID >> 0 & 0x0F;
if (!index)
{
total = qualcomm->FMID >> 4 & 0x0F;
count = qualcomm->FMID >> 0 & 0x0F;
if (memcmp (localcast, qualcomm->OUI, sizeof (qualcomm->OUI)))
{
#if defined (__WHYNOT__)
error (0, 0, "Wrong Message Vendor");
#endif
return (-1);
}
}
if (index != count)
{
#if defined (__WHYNOT__)
error (0, 0, "Message Fragment Out-of-order");
#endif
return (-1);
}
if (count > total)
{
#if defined (__WHYNOT__)
error (0, 0, "Fragment Count Exceeds Total");
#endif
return (-1);
}
count++;
#endif
}
return (0);
}
#endif