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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 PLCReadParameterBlock (struct channel * channel, struct message * message, void * memory, size_t extent);
*
* plc.h
*
* Read the PIB Image from an INT6000 using as many VS_RD_MOD
* messages as needed; Write image blocks to file as they are
* read;
*
* the objective here is to read the PIB module in 1024 byte blocks
* until the module offset equals or exceeds the PIB actual; we do
* not know the PIB actual until we have read the header contained
* in the first block read from OFFSET 0;
*
* MOFFSET and MLENGTH fields occupy different offsets in REQ and CNF
* messages; we exploit that by initializing them using CNF message
* offsets then copying values into REQ message offsets before each
* read; this works because confirmation messages always return all
* the data we request or nothing at all;
*
* Contributor(s):
* Charles Maier
* Nathaniel Houghton
*
*--------------------------------------------------------------------*/
#ifndef READPARAMETERBLOCK_SOURCE
#define READPARAMETERBLOCK_SOURCE
#include <stdint.h>
#include <unistd.h>
#include <memory.h>
#include "../tools/error.h"
#include "../tools/files.h"
#include "../pib/pib.h"
#include "../plc/plc.h"
signed PLCReadParameterBlock (struct channel * channel, struct message * message, void * memory, size_t extent)
{
uint8_t * buffer = (uint8_t *)(memory);
#ifndef __GNUC__
#pragma pack (push,1)
#endif
struct __packed vs_rd_mod_request
{
struct ethernet_hdr ethernet;
struct qualcomm_hdr qualcomm;
uint8_t MODULEID;
uint8_t MACCESS;
uint16_t MLENGTH;
uint32_t MOFFSET;
uint8_t MSECRET [16];
}
* request = (struct vs_rd_mod_request *) (message);
struct __packed vs_rd_mod_confirm
{
struct ethernet_hdr ethernet;
struct qualcomm_hdr qualcomm;
uint8_t MSTATUS;
uint8_t RESERVED1 [3];
uint8_t MODULEID;
uint8_t RESERVED;
uint16_t MLENGTH;
uint32_t MOFFSET;
uint32_t CHKSUM;
uint8_t BUFFER [PLC_RECORD_SIZE];
}
* confirm = (struct vs_rd_mod_confirm *) (message);
#ifndef __GNUC__
#pragma pack (pop)
#endif
uint16_t length = 0;
uint32_t offset = 0;
signed actual = PLC_RECORD_SIZE;
do
{
memset (message, 0, sizeof (* message));
EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
QualcommHeader (&request->qualcomm, 0, (VS_RD_MOD | MMTYPE_REQ));
request->MODULEID = VS_MODULE_PIB;
request->MLENGTH = HTOLE16 (actual);
request->MOFFSET = HTOLE32 (offset);
if (sendpacket (channel, message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) <= 0)
{
error (1, errno, CHANNEL_CANTSEND);
}
if (readpacket (channel, message, sizeof (* message)) <= 0)
{
error (1, errno, CHANNEL_CANTREAD);
}
if (UnwantedMessage (message, sizeof (* confirm), 0, (VS_RD_MOD | MMTYPE_CNF)))
{
actual = PLC_RECORD_SIZE;
offset = 0;
continue;
}
if (confirm->MSTATUS)
{
error (1, ECANCELED, PLC_WONTDOIT);
}
if (LE16TOH (confirm->MLENGTH) != actual)
{
error (1, ECANCELED, PLC_ERR_LENGTH);
}
if (LE32TOH (confirm->MOFFSET) != offset)
{
error (1, ECANCELED, PLC_ERR_OFFSET);
}
actual = LE16TOH (confirm->MLENGTH);
offset = LE32TOH (confirm->MOFFSET);
if (checksum32 (confirm->BUFFER, actual, confirm->CHKSUM))
{
error (1, ECANCELED, "Bad Packet Checksum");
}
if (offset == length)
{
struct pib_header * pib_header = (struct pib_header *) (confirm->BUFFER);
length = LE16TOH (pib_header->PIBLENGTH);
}
if ((offset + actual) > length)
{
actual = length - offset;
}
memcpy (buffer + offset, confirm->BUFFER, actual);
offset += actual;
extent -= actual;
}
while (offset < length);
return (offset);
}
#endif
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