C++ (Cpp) data_addr_to_fs_settings Beispiele

Beispiel #1

Datei: ieee802154_frame.c Projekt: sunkaizhu/zephyr

bool ieee802154_create_data_frame(struct net_if *iface,
				  struct in6_addr *dst,
				  uint8_t *p_buf,
				  uint8_t len)
{
	struct ieee802154_context *ctx = net_if_l2_data(iface);
	struct ieee802154_frame_params params;
	struct ieee802154_fcf_seq *fs;
	uint8_t *frag_start = p_buf;

	fs = generate_fcf_grounds(&p_buf, ctx->ack_requested);

	fs->fc.frame_type = IEEE802154_FRAME_TYPE_DATA;
	fs->sequence = ctx->sequence++;

	params.dst.pan_id = ctx->pan_id;
	params.pan_id = ctx->pan_id;
	data_addr_to_fs_settings(iface, dst, fs, &params);

	p_buf = generate_addressing_fields(iface, fs, &params, p_buf);

	if ((p_buf - frag_start) != len) {
		/* ll reserve was too small? We probably overwrote
		 * payload bytes
		 */
		return false;
	}

	/* Todo: handle security aux header */

	dbg_print_fs(fs);

	return true;
}

Beispiel #2

Datei: ieee802154_frame.c Projekt: bboozzoo/zephyr

bool ieee802154_create_data_frame(struct ieee802154_context *ctx,
				  struct net_linkaddr *dst,
				  struct net_buf *frag,
				  u8_t reserved_len)
{
	struct ieee802154_frame_params params;
	struct ieee802154_fcf_seq *fs;
	u8_t *p_buf = frag->data - reserved_len;
	u8_t *frag_start = p_buf;
	bool broadcast;

	fs = generate_fcf_grounds(&p_buf, ctx->ack_requested);

	fs->fc.frame_type = IEEE802154_FRAME_TYPE_DATA;
	fs->sequence = ctx->sequence++;

	params.dst.pan_id = ctx->pan_id;
	params.pan_id = ctx->pan_id;

	broadcast = data_addr_to_fs_settings(dst, fs, &params);

	p_buf = generate_addressing_fields(ctx, fs, &params, p_buf);

#ifdef CONFIG_NET_L2_IEEE802154_SECURITY
	if (broadcast) {
		NET_DBG("No security hdr needed: broadcasting");

		goto no_security_hdr;
	}

	fs->fc.security_enabled = 1;

	p_buf = generate_aux_security_hdr(&ctx->sec_ctx, p_buf);

	/* If tagged, let's retrieve tag space from ll reserved space.
	 * See comment in ieee802154_compute_header_size()
	 */
	if (ctx->sec_ctx.level != IEEE802154_SECURITY_LEVEL_NONE &&
	    ctx->sec_ctx.level != IEEE802154_SECURITY_LEVEL_ENC) {
		u8_t level;

		level = ctx->sec_ctx.level;
		if (level >= IEEE802154_SECURITY_LEVEL_ENC) {
			level -= 4;
		}

		/* p_buf should point to the right place */
		memmove(p_buf, frag->data, frag->len);
		reserved_len -= level_2_tag_size[level];
	}

no_security_hdr:
#endif /* CONFIG_NET_L2_IEEE802154_SECURITY */

	if ((p_buf - frag_start) != reserved_len) {
		/* ll reserve was too small? We probably overwrote
		 * payload bytes
		 */
		NET_ERR("Could not generate data frame %zu vs %u",
			(p_buf - frag_start), reserved_len);
		return false;
	}

	dbg_print_fs(fs);

	/* Let's encrypt/auth only in the end, is needed */
	return ieee802154_encrypt_auth(broadcast ? NULL : &ctx->sec_ctx,
				       frag_start, reserved_len, frag->len,
				       ctx->ext_addr);
}