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RIOT/pkg/lwip/contrib/netdev/lwip_netdev.c

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/*
* Copyright (C) 2015 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
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#include <assert.h>
#include <sys/uio.h>
#include <inttypes.h>
#include "lwip/err.h"
#include "lwip/ethip6.h"
#include "lwip/netif.h"
#include "lwip/netif/netdev.h"
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "netif/etharp.h"
#include "netif/lowpan6.h"
#include "net/eui64.h"
#include "net/ieee802154.h"
#include "net/ipv6/addr.h"
#include "net/netdev.h"
#include "net/netopt.h"
#include "utlist.h"
#include "thread.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
#define LWIP_NETDEV_NAME "lwip_netdev_mux"
#define LWIP_NETDEV_PRIO (THREAD_PRIORITY_MAIN - 4)
#define LWIP_NETDEV_STACKSIZE (THREAD_STACKSIZE_DEFAULT)
#define LWIP_NETDEV_QUEUE_LEN (8)
#define LWIP_NETDEV_MSG_TYPE_EVENT 0x1235
#define ETHERNET_IFNAME1 'E'
#define ETHERNET_IFNAME2 'T'
static kernel_pid_t _pid = KERNEL_PID_UNDEF;
static char _stack[LWIP_NETDEV_STACKSIZE];
static msg_t _queue[LWIP_NETDEV_QUEUE_LEN];
static char _tmp_buf[LWIP_NETDEV_BUFLEN];
#ifdef MODULE_NETDEV_ETH
static err_t _eth_link_output(struct netif *netif, struct pbuf *p);
#endif
#ifdef MODULE_LWIP_SIXLOWPAN
static err_t _ieee802154_link_output(struct netif *netif, struct pbuf *p);
#endif
static void _event_cb(netdev_t *dev, netdev_event_t event);
static void *_event_loop(void *arg);
static void _configure_netdev(netdev_t *dev)
{
/* Enable RX-complete interrupts */
static const netopt_enable_t enable = NETOPT_ENABLE;
int res = dev->driver->set(dev, NETOPT_RX_END_IRQ, &enable, sizeof(enable));
if (res < 0) {
DEBUG("lwip_netdev: enable NETOPT_RX_END_IRQ failed: %d\n", res);
}
}
err_t lwip_netdev_init(struct netif *netif)
{
LWIP_ASSERT("netif != NULL", (netif != NULL));
LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
netdev_t *netdev;
uint16_t dev_type;
err_t res = ERR_OK;
/* start multiplexing thread (only one needed) */
if (_pid <= KERNEL_PID_UNDEF) {
_pid = thread_create(_stack, LWIP_NETDEV_STACKSIZE, LWIP_NETDEV_PRIO,
THREAD_CREATE_STACKTEST, _event_loop, netif,
LWIP_NETDEV_NAME);
if (_pid <= 0) {
return ERR_IF;
}
}
/* initialize netdev and netif */
netdev = (netdev_t *)netif->state;
netdev->driver->init(netdev);
_configure_netdev(netdev);
netdev->event_callback = _event_cb;
if (netdev->driver->get(netdev, NETOPT_DEVICE_TYPE, &dev_type,
sizeof(dev_type)) < 0) {
return ERR_IF;
}
#if LWIP_NETIF_HOSTNAME
netif->hostname = "riot";
#endif /* LWIP_NETIF_HOSTNAME */
/* XXX: for now assume its Ethernet, since netdev is implemented only by ethernet drivers */
switch (dev_type) {
#ifdef MODULE_NETDEV_ETH
case NETDEV_TYPE_ETHERNET:
netif->name[0] = ETHERNET_IFNAME1;
netif->name[1] = ETHERNET_IFNAME2;
netif->hwaddr_len = (u8_t)netdev->driver->get(netdev, NETOPT_ADDRESS, netif->hwaddr,
sizeof(netif->hwaddr));
if (netif->hwaddr_len > sizeof(netif->hwaddr)) {
return ERR_IF;
}
/* TODO: get from driver (currently not in netdev_eth) */
netif->mtu = ETHERNET_DATA_LEN;
netif->linkoutput = _eth_link_output;
#if LWIP_IPV4
netif->output = etharp_output;
#endif
#if LWIP_IPV6
netif->output_ip6 = ethip6_output;
netif_create_ip6_linklocal_address(netif, 1); /* 1: hwaddr is 48-bit MAC addr */
#endif
netif->flags |= NETIF_FLAG_BROADCAST;
netif->flags |= NETIF_FLAG_ETHARP;
netif->flags |= NETIF_FLAG_ETHERNET;
break;
#endif
#ifdef MODULE_LWIP_SIXLOWPAN
case NETDEV_TYPE_IEEE802154:
{
u16_t val;
ip6_addr_t *addr;
if (netdev->driver->get(netdev, NETOPT_NID, &val,
sizeof(val)) < 0) {
return ERR_IF;
}
lowpan6_set_pan_id(val);
netif->hwaddr_len = (u8_t)netdev->driver->get(netdev, NETOPT_ADDRESS_LONG,
netif->hwaddr, sizeof(netif->hwaddr));
if (netif->hwaddr_len > sizeof(netif->hwaddr)) {
return ERR_IF;
}
netif->linkoutput = _ieee802154_link_output;
res = lowpan6_if_init(netif);
if (res != ERR_OK) {
return res;
}
/* assure usage of long address as source address */
val = netif->hwaddr_len;
if (netdev->driver->set(netdev, NETOPT_SRC_LEN, &val, sizeof(val)) < 0) {
return ERR_IF;
}
/* netif_create_ip6_linklocal_address() does weird byte-swapping
* with full IIDs, so let's do it ourselves */
addr = &(netif->ip6_addr[0]);
/* addr->addr is a uint32_t array */
if (l2util_ipv6_iid_from_addr(dev_type,
netif->hwaddr, netif->hwaddr_len,
(eui64_t *)&addr->addr[2]) < 0) {
return ERR_IF;
}
ipv6_addr_set_link_local_prefix((ipv6_addr_t *)&addr->addr[0]);
ip6_addr_assign_zone(addr, IP6_UNICAST, netif);
/* Set address state. */
#if LWIP_IPV6_DUP_DETECT_ATTEMPTS
/* Will perform duplicate address detection (DAD). */
netif->ip6_addr_state[0] = IP6_ADDR_TENTATIVE;
#else
/* Consider address valid. */
netif->ip6_addr_state[0] = IP6_ADDR_PREFERRED;
#endif /* LWIP_IPV6_AUTOCONFIG */
break;
}
#endif
default:
return ERR_IF; /* device type not supported yet */
}
netif->flags |= NETIF_FLAG_UP;
netif->flags |= NETIF_FLAG_LINK_UP;
netif->flags |= NETIF_FLAG_IGMP;
netif->flags |= NETIF_FLAG_MLD6;
netdev->context = netif;
#if LWIP_IPV6_AUTOCONFIG
netif->ip6_autoconfig_enabled = 1;
#endif
return res;
}
#ifdef MODULE_NETDEV_ETH
static err_t _eth_link_output(struct netif *netif, struct pbuf *p)
{
netdev_t *netdev = (netdev_t *)netif->state;
struct pbuf *q;
unsigned int count = 0;
#if ETH_PAD_SIZE
pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
#endif
LL_COUNT(p, q, count);
iolist_t iolist[count];
/* make last point to the last entry of iolist[] */
iolist_t *last = &iolist[count];
last--;
for (q = p, count = 0; q != NULL; q = q->next, count++) {
iolist_t *iol = &iolist[count];
iol->iol_next = (iol == last) ? NULL : &iolist[count + 1];
iol->iol_base = q->payload;
iol->iol_len = (size_t)q->len;
}
#if ETH_PAD_SIZE
pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
#endif
return (netdev->driver->send(netdev, iolist) > 0) ? ERR_OK : ERR_BUF;
}
#endif
#ifdef MODULE_LWIP_SIXLOWPAN
static err_t _ieee802154_link_output(struct netif *netif, struct pbuf *p)
{
LWIP_ASSERT("p->next == NULL", p->next == NULL);
netdev_t *netdev = (netdev_t *)netif->state;
iolist_t pkt = {
.iol_base = p->payload,
.iol_len = (p->len - IEEE802154_FCS_LEN), /* FCS is written by driver */
};
return (netdev->driver->send(netdev, &pkt) > 0) ? ERR_OK : ERR_BUF;
}
#endif
static struct pbuf *_get_recv_pkt(netdev_t *dev)
{
int len = dev->driver->recv(dev, _tmp_buf, sizeof(_tmp_buf), NULL);
if (len < 0) {
DEBUG("lwip_netdev: an error occurred while reading the packet\n");
return NULL;
}
assert(((unsigned)len) <= UINT16_MAX);
struct pbuf *p = pbuf_alloc(PBUF_RAW, (u16_t)len, PBUF_POOL);
if (p == NULL) {
DEBUG("lwip_netdev: can not allocate in pbuf\n");
return NULL;
}
pbuf_take(p, _tmp_buf, len);
return p;
}
static void _event_cb(netdev_t *dev, netdev_event_t event)
{
if (event == NETDEV_EVENT_ISR) {
assert(_pid != KERNEL_PID_UNDEF);
msg_t msg;
msg.type = LWIP_NETDEV_MSG_TYPE_EVENT;
msg.content.ptr = dev;
if (msg_send(&msg, _pid) <= 0) {
DEBUG("lwip_netdev: possibly lost interrupt.\n");
}
}
else {
struct netif *netif = dev->context;
switch (event) {
case NETDEV_EVENT_RX_COMPLETE: {
struct pbuf *p = _get_recv_pkt(dev);
if (p == NULL) {
DEBUG("lwip_netdev: error receiving packet\n");
return;
}
if (netif->input(p, netif) != ERR_OK) {
DEBUG("lwip_netdev: error inputing packet\n");
return;
}
}
break;
default:
break;
}
}
}
static void *_event_loop(void *arg)
{
(void)arg;
msg_init_queue(_queue, LWIP_NETDEV_QUEUE_LEN);
while (1) {
msg_t msg;
msg_receive(&msg);
if (msg.type == LWIP_NETDEV_MSG_TYPE_EVENT) {
netdev_t *dev = msg.content.ptr;
dev->driver->isr(dev);
}
}
return NULL;
}
/** @} */
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