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radio-af-packet.c
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radio-af-packet.c
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/*
* (C) 2016 Pengutronix, Alexander Aring <aar@pengutronix.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 HOLDER 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.
*/
#include <arpa/inet.h>
#include <assert.h>
#include <net/if.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/if_packet.h>
#include <common/code_utils.hpp>
#include "radio-posix.h"
#ifndef ETH_P_IEEE802154
#define ETH_P_IEEE802154 0x00F6
#endif
void posixRadioInit(void)
{
struct sockaddr_ll sll;
struct ifreq ifr;
char *ifname;
sSockFd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_IEEE802154));
VerifyOrExit(sSockFd != -1, perror("socket"));
ifname = getenv("AF_PACKET_IFNAME");
VerifyOrExit(ifname != NULL, printf("No AF_PACKET_IFNAME as env given\n"));
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
VerifyOrExit(ioctl(sSockFd, SIOCGIFINDEX, &ifr) == 0, perror("ioctl"));
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifr.ifr_ifindex;
sll.sll_protocol = htons(ETH_P_IEEE802154);
VerifyOrExit(bind(sSockFd, (struct sockaddr *)&sll, sizeof(sll)) != -1, perror("bind"));
sReceiveFrame.mPsdu = sReceiveMessage.mPsdu;
sTransmitFrame.mPsdu = sTransmitMessage.mPsdu;
sAckFrame.mPsdu = sAckMessage.mPsdu;
return;
exit:
close(sSockFd);
sSockFd = -1;
exit(EXIT_FAILURE);
}
void radioReceive(otInstance *aInstance)
{
ssize_t rval = recv(sSockFd, sReceiveMessage.mPsdu, sizeof(sReceiveMessage.mPsdu), 0);
if (rval < 0)
{
perror("recv");
exit(EXIT_FAILURE);
}
sReceiveFrame.mLength = (uint8_t)(rval);
if (sAckWait &&
isFrameTypeAck(sReceiveFrame.mPsdu) &&
getDsn(sReceiveFrame.mPsdu) == getDsn(sTransmitFrame.mPsdu))
{
sState = kStateReceive;
sAckWait = false;
#if OPENTHREAD_ENABLE_DIAG
if (otPlatDiagModeGet())
{
otPlatDiagRadioTransmitDone(aInstance, isFramePending(sReceiveFrame.mPsdu), kThreadError_None);
}
else
#endif
{
otPlatRadioTransmitDone(aInstance, isFramePending(sReceiveFrame.mPsdu), kThreadError_None);
}
}
else if ((sState == kStateReceive || sState == kStateTransmit))
{
radioProcessFrame(aInstance);
}
}
void radioTransmit(struct RadioMessage *msg, const struct RadioPacket *pkt)
{
ssize_t rval;
rval = send(sSockFd, msg->mPsdu, pkt->mLength - sizeof(uint16_t), 0);
if (rval < 0)
{
perror("send");
exit(EXIT_FAILURE);
}
}