int bt_mesh_net_send()

in nimble/host/mesh/src/net.c [502:570]

• 49 lines of code
• 12 McCabe index (conditional complexity)

int bt_mesh_net_send(struct bt_mesh_net_tx *tx, struct os_mbuf *buf,
		     const struct bt_mesh_send_cb *cb, void *cb_data)
{
	const struct bt_mesh_net_cred *cred;
	int err;

	BT_DBG("src 0x%04x dst 0x%04x len %u headroom %zu tailroom %zu",
	       tx->src, tx->ctx->addr, buf->om_len, net_buf_headroom(buf),
	       net_buf_tailroom(buf));
	BT_DBG("Payload len %u: %s", buf->om_len, bt_hex(buf->om_data, buf->om_len));
	BT_DBG("Seq 0x%06x", bt_mesh.seq);

	cred = net_tx_cred_get(tx);
	err = net_header_encode(tx, cred->nid, buf);
	if (err) {
		goto done;
	}

	BT_DBG("encoded %u bytes: %s", buf->om_len,
		   bt_hex(buf->om_data, buf->om_len));

	/* Deliver to local network interface if necessary */
	if (bt_mesh_fixed_group_match(tx->ctx->addr) ||
	    bt_mesh_has_addr(tx->ctx->addr)) {
		err = loopback(tx, buf->om_data, buf->om_len);

		/* Local unicast messages should not go out to network */
		if (BT_MESH_ADDR_IS_UNICAST(tx->ctx->addr) ||
		    tx->ctx->send_ttl == 1U) {
			if (!err) {
				send_cb_finalize(cb, cb_data);
			}

			goto done;
		}
	}
	/* Mesh spec 3.4.5.2: "The output filter of the interface connected to
	 * advertising or GATT bearers shall drop all messages with TTL value
	 * set to 1." If a TTL=1 packet wasn't for a local interface, it is
	 * invalid.
	 */
	if (tx->ctx->send_ttl == 1U) {
		err = -EINVAL;
		goto done;
	}

	err = net_encrypt(buf, cred, BT_MESH_NET_IVI_TX, false);
	if (err) {
		goto done;
	}

	BT_MESH_ADV(buf)->cb = cb;
	BT_MESH_ADV(buf)->cb_data = cb_data;

	/* Deliver to GATT Proxy Clients if necessary. */
	if (IS_ENABLED(CONFIG_BT_MESH_GATT_PROXY) &&
	    bt_mesh_proxy_relay(buf, tx->ctx->addr) &&
	    BT_MESH_ADDR_IS_UNICAST(tx->ctx->addr)) {

		err = 0;
		goto done;
	}

	bt_mesh_adv_send(buf, cb, cb_data);

done:
	net_buf_unref(buf);
	return err;
}