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gnrc_netif_device_type.c
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gnrc_netif_device_type.c
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/*
* Copyright (C) 2018 Freie Universität 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
* @brief Functions that are based around a network interface's device type.
* @author Martine Lenders <m.lenders@fu-berlin.de>
*/
#include <errno.h>
#include "log.h"
#ifdef MODULE_GNRC_IPV6
#include "net/ipv6.h"
#endif
#include "net/gnrc/netif.h"
#include "net/eui48.h"
#include "net/ethernet.h"
#include "net/ieee802154.h"
netopt_t gnrc_netif_get_l2addr_opt(const gnrc_netif_t *netif)
{
netopt_t res = NETOPT_ADDRESS;
switch (netif->device_type) {
#if defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE) || \
defined(MODULE_NORDIC_SOFTDEVICE_BLE)
case NETDEV_TYPE_IEEE802154:
case NETDEV_TYPE_BLE: {
netdev_t *dev = netif->dev;
int r;
uint16_t tmp;
r = dev->driver->get(dev, NETOPT_SRC_LEN, &tmp, sizeof(tmp));
assert(r == sizeof(tmp));
assert(r <= ((int)UINT8_MAX));
(void)r;
if (tmp == IEEE802154_LONG_ADDRESS_LEN) {
res = NETOPT_ADDRESS_LONG;
}
}
break;
#endif
default:
break;
}
return res;
}
#if defined(MODULE_CC110X) || defined(MODULE_NRFMIN)
static void _create_eui64_from_short(const uint8_t *addr, size_t addr_len,
eui64_t *eui64)
{
const unsigned offset = sizeof(eui64_t) - addr_len;
memset(eui64->uint8, 0, sizeof(eui64->uint8));
eui64->uint8[3] = 0xff;
eui64->uint8[4] = 0xfe;
memcpy(&eui64->uint8[offset], addr, addr_len);
}
#endif /* defined(MODULE_CC110X) || defined(MODULE_NRFMIN) */
int gnrc_netif_eui64_from_addr(const gnrc_netif_t *netif,
const uint8_t *addr, size_t addr_len,
eui64_t *eui64)
{
#if GNRC_NETIF_L2ADDR_MAXLEN > 0
if (netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR) {
switch (netif->device_type) {
#if defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW) || \
defined(MODULE_NORDIC_SOFTDEVICE_BLE)
case NETDEV_TYPE_ETHERNET:
case NETDEV_TYPE_ESP_NOW:
case NETDEV_TYPE_BLE:
if (addr_len == sizeof(eui48_t)) {
eui48_to_eui64(eui64, (const eui48_t *)addr);
return sizeof(eui64_t);
}
else {
return -EINVAL;
}
#endif /* defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW) */
#if defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE)
case NETDEV_TYPE_IEEE802154:
switch (addr_len) {
case IEEE802154_SHORT_ADDRESS_LEN: {
netdev_t *dev = netif->dev;
return dev->driver->get(dev, NETOPT_ADDRESS_LONG, eui64,
sizeof(eui64_t));
}
case IEEE802154_LONG_ADDRESS_LEN:
memcpy(eui64, addr, addr_len);
return sizeof(eui64_t);
default:
return -EINVAL;
}
#endif /* defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE) */
#if defined(MODULE_CC110X) || defined(MODULE_NRFMIN)
case NETDEV_TYPE_CC110X:
case NETDEV_TYPE_NRFMIN:
if (addr_len <= 3) {
_create_eui64_from_short(addr, addr_len, eui64);
return sizeof(eui64_t);
}
else {
return -EINVAL;
}
#endif /* defined(MODULE_CC110X) || defined(MODULE_NRFMIN) */
default:
(void)addr;
(void)addr_len;
(void)eui64;
#ifdef DEVELHELP
LOG_ERROR("gnrc_netif: can't convert hardware address to EUI-64"
" on interface %u\n", netif->pid);
#endif /* DEVELHELP */
assert(false);
break;
}
}
#endif /* GNRC_NETIF_L2ADDR_MAXLEN > 0 */
return -ENOTSUP;
}
#ifdef MODULE_GNRC_IPV6
void gnrc_netif_ipv6_init_mtu(gnrc_netif_t *netif)
{
#ifdef MODULE_GNRC_IPV6
netdev_t *dev = netif->dev;
int res;
uint16_t tmp;
switch (netif->device_type) {
#if defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_NRFMIN) || \
defined(MODULE_XBEE) || defined(MODULE_ESP_NOW) || \
defined(MODULE_GNRC_SIXLOENC)
case NETDEV_TYPE_IEEE802154:
case NETDEV_TYPE_NRFMIN:
#ifdef MODULE_GNRC_SIXLOWPAN_IPHC
netif->flags |= GNRC_NETIF_FLAGS_6LO_HC;
#endif
/* intentionally falls through */
case NETDEV_TYPE_ESP_NOW:
res = dev->driver->get(dev, NETOPT_MAX_PACKET_SIZE,
&tmp, sizeof(tmp));
assert(res == sizeof(tmp));
#ifdef MODULE_GNRC_SIXLOWPAN
netif->ipv6.mtu = IPV6_MIN_MTU;
netif->sixlo.max_frag_size = tmp;
#else
netif->ipv6.mtu = tmp;
#endif
break;
#endif /* defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_NRFMIN) || \
* defined(MODULE_XBEE) || defined(MODULE_ESP_NOW) */
#ifdef MODULE_NETDEV_ETH
case NETDEV_TYPE_ETHERNET:
#ifdef MODULE_GNRC_IPV6
netif->ipv6.mtu = ETHERNET_DATA_LEN;
#endif
#if defined(MODULE_GNRC_SIXLOWPAN_IPHC) && defined(MODULE_GNRC_SIXLOENC)
netif->flags |= GNRC_NETIF_FLAGS_6LO_HC;
#endif
break;
#endif
#ifdef MODULE_NORDIC_SOFTDEVICE_BLE
case NETDEV_TYPE_BLE:
netif->ipv6.mtu = IPV6_MIN_MTU;
#ifdef MODULE_GNRC_SIXLOWPAN_IPHC
netif->flags |= GNRC_NETIF_FLAGS_6LO_HC;
#endif
break;
#endif
default:
#ifdef DEVELHELP
LOG_DEBUG("gnrc_netif: getting MTU from device for interface %i\n",
netif->pid);
#endif
res = dev->driver->get(dev, NETOPT_MAX_PACKET_SIZE,
&tmp, sizeof(tmp));
if (res < 0) {
/* assume maximum possible transition unit */
netif->ipv6.mtu = UINT16_MAX;
}
else {
netif->ipv6.mtu = tmp;
}
break;
}
#endif
}
int gnrc_netif_ipv6_iid_from_addr(const gnrc_netif_t *netif,
const uint8_t *addr, size_t addr_len,
eui64_t *iid)
{
#if GNRC_NETIF_L2ADDR_MAXLEN > 0
if (netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR) {
switch (netif->device_type) {
#if defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE)
case NETDEV_TYPE_IEEE802154:
if (ieee802154_get_iid(iid, addr, addr_len) != NULL) {
return sizeof(eui64_t);
}
else {
return -EINVAL;
}
#endif /* defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE) */
#if defined(MODULE_CC110X) || defined(MODULE_NRFMIN)
case NETDEV_TYPE_CC110X:
case NETDEV_TYPE_NRFMIN:
if (addr_len <= 3) {
_create_eui64_from_short(addr, addr_len, iid);
/* since this address conversion is based on the IEEE
* 802.15.4 address conversion for short addresses, the
* U/L bit doesn't need to be flipped.
* see https://tools.ietf.org/html/rfc6282#section-3.2.2 */
return sizeof(eui64_t);
}
else {
return -EINVAL;
}
#endif /* defined(MODULE_CC110X) || defined(MODULE_NRFMIN) */
default: {
int res = gnrc_netif_eui64_from_addr(netif, addr, addr_len,
iid);
if (res == sizeof(eui64_t)) {
iid->uint8[0] ^= 0x02;
}
return res;
}
}
}
#endif /* GNRC_NETIF_L2ADDR_MAXLEN > 0 */
return -ENOTSUP;
}
int gnrc_netif_ipv6_iid_to_addr(const gnrc_netif_t *netif, const eui64_t *iid,
uint8_t *addr)
{
assert(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR);
switch (netif->device_type) {
#if defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW) || \
defined(MODULE_NORDIC_SOFTDEVICE_BLE)
case NETDEV_TYPE_ETHERNET:
case NETDEV_TYPE_ESP_NOW:
case NETDEV_TYPE_BLE:
eui48_from_ipv6_iid((eui48_t *)addr, iid);
return sizeof(eui48_t);
#endif /* defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW) */
#if defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE)
case NETDEV_TYPE_IEEE802154:
/* assume address was based on EUI-64
* (see https://tools.ietf.org/html/rfc6775#section-5.2) */
memcpy(addr, iid, sizeof(eui64_t));
addr[0] ^= 0x02;
return sizeof(eui64_t);
#endif /* defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE) */
#ifdef MODULE_NRFMIN
case NETDEV_TYPE_NRFMIN:
addr[0] = iid->uint8[6];
addr[1] = iid->uint8[7];
return sizeof(uint16_t);
#endif /* MODULE_NETDEV_IEEE802154 */
#ifdef MODULE_CC110X
case NETDEV_TYPE_CC110X:
addr[0] = iid->uint8[7];
return sizeof(uint8_t);
#endif /* MODULE_CC110X */
default:
(void)iid;
(void)addr;
#ifdef DEVELHELP
LOG_ERROR("gnrc_netif: can't convert IID to hardware address "
"on interface %u\n", netif->pid);
#endif /* DEVELHELP */
assert(false);
break;
}
return -ENOTSUP;
}
int gnrc_netif_ndp_addr_len_from_l2ao(gnrc_netif_t *netif,
const ndp_opt_t *opt)
{
assert(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR);
switch (netif->device_type) {
#ifdef MODULE_CC110X
case NETDEV_TYPE_CC110X:
(void)opt;
return sizeof(uint8_t);
#endif /* MODULE_CC110X */
#if defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW)
case NETDEV_TYPE_ETHERNET:
case NETDEV_TYPE_ESP_NOW:
/* see https://tools.ietf.org/html/rfc2464#section-6*/
if (opt->len == 1U) {
return ETHERNET_ADDR_LEN;
}
else {
return -EINVAL;
}
#endif /* defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW) */
#ifdef MODULE_NRFMIN
case NETDEV_TYPE_NRFMIN:
(void)opt;
return sizeof(uint16_t);
#endif /* MODULE_NRFMIN */
#if defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE)
case NETDEV_TYPE_IEEE802154:
/* see https://tools.ietf.org/html/rfc4944#section-8 */
switch (opt->len) {
case 1U:
return IEEE802154_SHORT_ADDRESS_LEN;
case 2U:
return IEEE802154_LONG_ADDRESS_LEN;
default:
return -EINVAL;
}
#endif /* defined(MODULE_NETDEV_IEEE802154) || defined(MODULE_XBEE) */
default:
(void)opt;
#ifdef DEVELHELP
LOG_ERROR("gnrc_netif: can't get address length from NDP link-layer "
"address option on interface %u\n", netif->pid);
#endif
assert(false);
break;
}
return -ENOTSUP;
}
#endif /* MODULE_GNRC_IPV6 */
/** @} */