a752c7ab
 elopes
add first test an...
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/*
* Copyright (C) 2017 Freie Universitรคt Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @{
*
* @file
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#include "net/gnrc/netdev/raw.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
#define IP_VERSION_MASK (0xf0)
#define IP_VERSION4 (0x40)
#define IP_VERSION6 (0x60)
static gnrc_pktsnip_t *_recv(gnrc_netdev_t *gnrc_netdev)
{
netdev_t *dev = gnrc_netdev->dev;
int bytes_expected = dev->driver->recv(dev, NULL, 0, NULL);
gnrc_pktsnip_t *pkt = NULL;
if (bytes_expected > 0) {
int nread;
pkt = gnrc_pktbuf_add(NULL, NULL, bytes_expected, GNRC_NETTYPE_UNDEF);
if (!pkt) {
DEBUG("gnrc_netdev_raw: cannot allocate pktsnip.\n");
/* drop packet */
dev->driver->recv(dev, NULL, bytes_expected, NULL);
return pkt;
}
nread = dev->driver->recv(dev, pkt->data, bytes_expected, NULL);
if (nread <= 0) {
DEBUG("gnrc_netdev_raw: read error.\n");
gnrc_pktbuf_release(pkt);
return NULL;
}
if (nread < bytes_expected) {
/* we've got less then the expected packet size,
* so free the unused space.*/
DEBUG("gnrc_netdev_raw: reallocating.\n");
gnrc_pktbuf_realloc_data(pkt, nread);
}
switch (((uint8_t *)pkt->data)[0] & IP_VERSION_MASK) {
#ifdef MODULE_GNRC_IPV6
case IP_VERSION6:
pkt->type = GNRC_NETTYPE_IPV6;
break;
#endif
default:
/* leave UNDEF */
break;
}
}
return pkt;
}
static int _send(gnrc_netdev_t *gnrc_netdev, gnrc_pktsnip_t *pkt)
{
gnrc_pktsnip_t *vector;
int res = -ENOBUFS;
size_t n;
if (pkt->type == GNRC_NETTYPE_NETIF) {
/* we don't need the netif snip: remove it */
pkt = gnrc_pktbuf_remove_snip(pkt, pkt);
}
vector = gnrc_pktbuf_get_iovec(pkt, &n);
if (vector != NULL) {
struct iovec *v = (struct iovec *)vector->data;
netdev_t *dev = gnrc_netdev->dev;
#ifdef MODULE_NETSTATS_L2
gnrc_netdev->dev->stats.tx_unicast_count++;
#endif
res = dev->driver->send(dev, v, n);
}
return res;
}
int gnrc_netdev_raw_init(gnrc_netdev_t *gnrc_netdev, netdev_t *dev)
{
gnrc_netdev->send = _send;
gnrc_netdev->recv = _recv;
gnrc_netdev->dev = dev;
return 0;
}
/** @} */
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