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LocalDevices.c
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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.
*
*--------------------------------------------------------------------*/
/*====================================================================*
*
* unsigned LocalDevices (struct channel * channel, struct message * message, void * memory, size_t extent);
*
* plc.h
*
* populate a memory region with consecutive Ethernet addresses;
* the addresses belong to Atheros powerline devices connected to
* the host interface specified in struct channel; each bridge may
* be connected to one or more HomePlug AV devices via powerline;
*
* each powerline bridge normally belongs to a different powerline
* network but is is possible for multiple bridges to belong to the
* same powerline network thus leading to confusing configurations;
*
* use function NetworkDevices() to discover all devices on each
* powerline network;
*
* although this function accepts a channel structure, it ignores
* the channel peer address and sends a VS_SW_VER request message
* to the Local Management Address; this causes all local devices
* to respond; the list is a collection of source addresses taken
* from all responses;
*
*
* Contributor(s):
* Charles Maier <cmaier@qca.qualcomm.com>
* Matthieu Poullet <m.poullet@avm.de>
*
*--------------------------------------------------------------------*/
#ifndef NETWORKBRIDGES_SOURCE
#define NETWORKBRIDGES_SOURCE
#include <memory.h>
#include <errno.h>
#include "../plc/plc.h"
#include "../ether/channel.h"
#include "../tools/types.h"
#include "../tools/error.h"
unsigned LocalDevices (struct channel const * channel, struct message * message, void * memory, size_t extent)
{
extern const byte localcast [ETHER_ADDR_LEN];
struct vs_sw_ver_request
{
struct ethernet_hdr ethernet;
struct qualcomm_hdr qualcomm;
}
* request = (struct vs_sw_ver_request *)(message);
uint8_t * origin = (uint8_t *)(memory);
uint8_t * offset = (uint8_t *)(memory);
ssize_t packetsize;
memset (memory, 0, extent);
memset (message, 0, sizeof (* message));
EthernetHeader (&request->ethernet, localcast, channel->host, channel->type);
QualcommHeader (&request->qualcomm, 0, (VS_SW_VER | MMTYPE_REQ));
if (sendpacket (channel, message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) <= 0)
{
return (0);
}
while ((packetsize = readpacket (channel, message, sizeof (* message))) > 0)
{
if (UnwantedMessage (message, packetsize, 0, (VS_SW_VER | MMTYPE_CNF)))
{
continue;
}
if (extent >= sizeof (message->ethernet.OSA))
{
memcpy (offset, message->ethernet.OSA, sizeof (message->ethernet.OSA));
offset += sizeof (message->ethernet.OSA);
extent -= sizeof (message->ethernet.OSA);
}
}
return ((unsigned)(offset - origin) / ETHER_ADDR_LEN);
}
#endif
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