subsys/net/ip/l2/ieee802154/ieee802154_radio_utils.h

/*
 * Copyright (c) 2016 Intel Corporation.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef __IEEE802154_RADIO_UTILS_H__
#define __IEEE802154_RADIO_UTILS_H__

typedef int (ieee802154_radio_tx_frag_t)(struct net_if *iface,
					 struct net_buf *buf,
					 struct net_buf *frag);

static inline bool prepare_for_ack(struct ieee802154_context *ctx,
				   struct net_buf *buf)
{
	if (ieee802154_ack_required(buf)) {
		ctx->ack_received = false;
		k_sem_init(&ctx->ack_lock, 0, UINT_MAX);

		return true;
	}

	return false;
}

static inline int wait_for_ack(struct ieee802154_context *ctx,
			       bool ack_required)
{
	if (!ack_required) {
		return 0;
	}

	if (k_sem_take(&ctx->ack_lock, 10) == 0) {
		/*
		 * We reinit the semaphore in case handle_ack
		 * got called multiple times.
		 */
		k_sem_init(&ctx->ack_lock, 0, UINT_MAX);
	}

	return ctx->ack_received ? 0 : -EIO;
}

static inline int handle_ack(struct ieee802154_context *ctx,
			     struct net_buf *buf)
{
	if (buf->len == IEEE802154_ACK_PKT_LENGTH) {
		ctx->ack_received = true;
		k_sem_give(&ctx->ack_lock);

		return NET_OK;
	}

	return NET_CONTINUE;
}

static inline int tx_buffer_fragments(struct net_if *iface,
				      struct net_buf *buf,
				      ieee802154_radio_tx_frag_t *tx_func)
{
	int ret = 0;
	struct net_buf *frag;

	frag = buf->frags;
	while (frag) {
		ret = tx_func(iface, buf, frag);
		if (ret) {
			break;
		}

		frag = frag->frags;
	}

	if (!ret) {
		net_nbuf_unref(buf);
	}

	return ret;
}

#endif /* __IEEE802154_RADIO_UTILS_H__ */