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* Copyright (c) 2018 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#define NET_SYS_LOG_LEVEL CONFIG_OPENTHREAD_L2_LOG_LEVEL
#if defined(CONFIG_OPENTHREAD_L2_DEBUG)
#define NET_DOMAIN "net/openthread_l2"
#define NET_LOG_ENABLED 1
#endif
#include <net/net_core.h>
#include <net/net_pkt.h>
#include <net/net_mgmt.h>
#include <net/openthread.h>
#include <net_private.h>
#include <init.h>
#include <misc/util.h>
#include <misc/__assert.h>
#include <openthread/openthread.h>
#include <openthread/cli.h>
#include <platform.h>
#include <platform-zephyr.h>
#include "openthread_utils.h"
#define OT_STACK_SIZE (CONFIG_OPENTHREAD_THREAD_STACK_SIZE)
#define OT_PRIORITY K_PRIO_COOP(CONFIG_OPENTHREAD_THREAD_PRIORITY)
extern void platformShellInit(otInstance *aInstance);
K_SEM_DEFINE(ot_sem, 0, 1);
K_THREAD_STACK_DEFINE(ot_stack_area, OT_STACK_SIZE);
static struct k_thread ot_thread_data;
static k_tid_t ot_tid;
static struct net_linkaddr *ll_addr;
static struct net_mgmt_event_callback ip6_addr_cb;
static void ipv6_addr_event_handler(struct net_mgmt_event_callback *cb,
u32_t mgmt_event, struct net_if *iface)
{
struct openthread_context *ot_context = net_if_l2_data(iface);
if (mgmt_event == NET_EVENT_IPV6_ADDR_ADD) {
add_ipv6_addr_to_ot(ot_context);
} else if (mgmt_event == NET_EVENT_IPV6_MADDR_ADD) {
add_ipv6_maddr_to_ot(ot_context);
}
}
void otPlatRadioGetIeeeEui64(otInstance *instance, uint8_t *ieee_eui64)
{
ARG_UNUSED(instance);
memcpy(ieee_eui64, ll_addr->addr, ll_addr->len);
}
void otTaskletsSignalPending(otInstance *instance)
{
k_sem_give(&ot_sem);
}
void PlatformEventSignalPending(void)
{
k_sem_give(&ot_sem);
}
void ot_state_changed_handler(uint32_t flags, void *context)
{
struct openthread_context *ot_context = context;
NET_INFO("State changed! Flags: 0x%08" PRIx32 " Current role: %d",
flags, otThreadGetDeviceRole(ot_context->instance));
if (flags & OT_CHANGED_IP6_ADDRESS_REMOVED) {
NET_DBG("Ipv6 address removed");
rm_ipv6_maddr_from_zephyr(ot_context);
}
if (flags & OT_CHANGED_IP6_ADDRESS_ADDED) {
NET_DBG("Ipv6 address added");
add_ipv6_maddr_to_zephyr(ot_context);
}
}
void ot_receive_handler(otMessage *aMessage, void *context)
{
struct openthread_context *ot_context = context;
u16_t offset = 0;
u16_t read_len;
struct net_pkt *pkt;
struct net_buf *prev_buf = NULL;
pkt = net_pkt_get_reserve_rx(0, K_NO_WAIT);
if (!pkt) {
NET_ERR("Failed to reserve net pkt");
goto out;
}
while (1) {
struct net_buf *pkt_buf;
pkt_buf = net_pkt_get_frag(pkt, K_NO_WAIT);
if (!pkt_buf) {
NET_ERR("Failed to get fragment buf");
net_pkt_unref(pkt);
goto out;
}
read_len = otMessageRead(aMessage,
offset,
pkt_buf->data,
net_buf_tailroom(pkt_buf));
if (!read_len) {
net_buf_unref(pkt_buf);
break;
}
net_buf_add(pkt_buf, read_len);
if (!prev_buf) {
net_pkt_frag_insert(pkt, pkt_buf);
} else {
net_buf_frag_insert(prev_buf, pkt_buf);
}
prev_buf = pkt_buf;
offset += read_len;
}
NET_DBG("Injecting Ip6 packet to Zephyr net stack");
#if defined(CONFIG_OPENTHREAD_L2_DEBUG_DUMP_IPV6)
net_hexdump_frags("Received IPv6 packet", pkt, true);
#endif
if (!pkt_list_is_full(ot_context)) {
if (net_recv_data(ot_context->iface, pkt) < 0) {
NET_ERR("net_recv_data failed");
goto out;
}
pkt_list_add(ot_context, pkt);
pkt = NULL;
} else {
NET_INFO("Pacet list is full");
}
out:
if (pkt) {
net_pkt_unref(pkt);
}
otMessageFree(aMessage);
}
static void openthread_process(void *context, void *arg2, void *arg3)
{
struct openthread_context *ot_context = context;
while (1) {
while (otTaskletsArePending(ot_context->instance)) {
otTaskletsProcess(ot_context->instance);
}
PlatformProcessDrivers(ot_context->instance);
k_sem_take(&ot_sem, K_FOREVER);
}
}
static enum net_verdict openthread_recv(struct net_if *iface,
struct net_pkt *pkt)
{
struct openthread_context *ot_context = net_if_l2_data(iface);
if (pkt_list_peek(ot_context) == pkt) {
pkt_list_remove_last(ot_context);
NET_DBG("Got injected Ip6 packet, "
"sending to upper layers");
#if defined(CONFIG_OPENTHREAD_L2_DEBUG_DUMP_IPV6)
net_hexdump_frags("Injected IPv6 packet", pkt, true);
#endif
return NET_CONTINUE;
}
NET_DBG("Got 802.15.4 packet, sending to OT");
otRadioFrame recv_frame;
recv_frame.mPsdu = net_buf_frag_last(pkt->frags)->data;
/* Length inc. CRC. */
recv_frame.mLength = net_buf_frags_len(pkt->frags);
recv_frame.mChannel = platformRadioChannelGet(ot_context->instance);
recv_frame.mLqi = net_pkt_ieee802154_lqi(pkt);
recv_frame.mRssi = net_pkt_ieee802154_rssi(pkt);
#if defined(CONFIG_OPENTHREAD_L2_DEBUG_DUMP_15_4)
net_hexdump_frags("Received 802.15.4 frame", pkt, true);
#endif
#if OPENTHREAD_ENABLE_DIAG
if (otPlatDiagModeGet()) {
otPlatDiagRadioReceiveDone(ot_context->instance,
&recv_frame, OT_ERROR_NONE);
} else
#endif
{
otPlatRadioReceiveDone(ot_context->instance,
&recv_frame, OT_ERROR_NONE);
}
net_pkt_unref(pkt);
return NET_OK;
}
enum net_verdict openthread_send(struct net_if *iface, struct net_pkt *pkt)
{
struct openthread_context *ot_context = net_if_l2_data(iface);
enum net_verdict ret = NET_OK;
otMessage *message;
struct net_buf *frag;
NET_DBG("Sending Ip6 packet to ot stack");
message = otIp6NewMessage(ot_context->instance, true);
if (message == NULL) {
goto exit;
}
for (frag = pkt->frags; frag; frag = frag->frags) {
if (otMessageAppend(message, frag->data,
frag->len) != OT_ERROR_NONE) {
NET_ERR("Error while appending to otMessage");
otMessageFree(message);
goto exit;
}
}
if (otIp6Send(ot_context->instance, message) != OT_ERROR_NONE) {
NET_ERR("Error while calling otIp6Send");
goto exit;
}
#if defined(CONFIG_OPENTHREAD_L2_DEBUG_DUMP_IPV6)
net_hexdump_frags("Sent IPv6 packet", pkt, true);
#endif
exit:
net_pkt_unref(pkt);
return ret;
}
static u16_t openthread_reserve(struct net_if *iface, void *arg)
{
ARG_UNUSED(iface);
ARG_UNUSED(arg);
return 0;
}
enum net_verdict ieee802154_radio_handle_ack(struct net_if *iface,
struct net_buf *buf)
{
ARG_UNUSED(iface);
ARG_UNUSED(buf);
NET_DBG("");
return NET_CONTINUE;
}
static int openthread_init(struct net_if *iface)
{
struct openthread_context *ot_context = net_if_l2_data(iface);
NET_DBG("openthread_init");
PlatformInit(0, NULL);
ot_context->instance = otInstanceInitSingle();
ot_context->iface = iface;
__ASSERT(ot_context->instance, "OT instance is NULL");
#if defined(CONFIG_OPENTHREAD_SHELL)
platformShellInit(ot_context->instance);
#endif
NET_INFO("OpenThread version: %s",
otGetVersionString());
NET_INFO("Network name: %s",
otThreadGetNetworkName(ot_context->instance));
otLinkSetChannel(ot_context->instance, CONFIG_OPENTHREAD_CHANNEL);
otLinkSetPanId(ot_context->instance, CONFIG_OPENTHREAD_PANID);
otIp6SetEnabled(ot_context->instance, true);
otThreadSetEnabled(ot_context->instance, true);
otIp6SetReceiveFilterEnabled(ot_context->instance, true);
otIp6SetReceiveCallback(ot_context->instance,
ot_receive_handler, ot_context);
otSetStateChangedCallback(ot_context->instance,
&ot_state_changed_handler, ot_context);
ll_addr = net_if_get_link_addr(iface);
net_mgmt_init_event_callback(&ip6_addr_cb, ipv6_addr_event_handler,
NET_EVENT_IPV6_ADDR_ADD |
NET_EVENT_IPV6_MADDR_ADD);
net_mgmt_add_event_callback(&ip6_addr_cb);
ot_tid = k_thread_create(&ot_thread_data, ot_stack_area,
K_THREAD_STACK_SIZEOF(ot_stack_area),
openthread_process,
ot_context, NULL, NULL,
OT_PRIORITY, 0, K_NO_WAIT);
return 0;
}
void ieee802154_init(struct net_if *iface)
{
openthread_init(iface);
}
int ieee802154_radio_send(struct net_if *iface, struct net_pkt *pkt)
{
ARG_UNUSED(iface);
ARG_UNUSED(pkt);
/* Shouldn't be here */
__ASSERT(false, "OpenThread L2 should never reach here");
return -EIO;
}
NET_L2_INIT(OPENTHREAD_L2, openthread_recv, openthread_send,
openthread_reserve, NULL);
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