static int mod_app_bind()

in nimble/host/mesh/src/cfg_srv.c [1908:1975]

• 55 lines of code
• 10 McCabe index (conditional complexity)

static int mod_app_bind(struct bt_mesh_model *model,
			struct bt_mesh_msg_ctx *ctx,
			struct os_mbuf *buf)
{
	struct os_mbuf *msg = BT_MESH_MODEL_BUF(OP_MOD_APP_STATUS, 9);
	uint16_t elem_addr, key_app_idx;
	struct bt_mesh_model *mod;
	struct bt_mesh_elem *elem;
	uint8_t *mod_id, status;
	bool vnd;
	int err = 0;

	if ((buf->om_len != 6U) && (buf->om_len != 8U)) {
		BT_ERR("The message size for the application opcode is incorrect.");
		return -EMSGSIZE;
	}

	elem_addr = net_buf_simple_pull_le16(buf);
	if (!BT_MESH_ADDR_IS_UNICAST(elem_addr)) {
		BT_WARN("Prohibited element address");
		err = -EINVAL;
		goto done;
	}

	key_app_idx = net_buf_simple_pull_le16(buf);
	mod_id = buf->om_data;

	elem = bt_mesh_elem_find(elem_addr);
	if (!elem) {
		mod = NULL;
		vnd = (buf->om_len == 4);
		status = STATUS_INVALID_ADDRESS;
		goto send_status;
	}

	mod = get_model(elem, buf, &vnd);
	if (!mod) {
		status = STATUS_INVALID_MODEL;
		goto send_status;
	}

	/* Configuration Server only allows device key based access */
	if (model == mod) {
		BT_ERR("Client tried to bind AppKey to Configuration Model");
		status = STATUS_CANNOT_BIND;
		goto send_status;
	}

	status = mod_bind(mod, key_app_idx);

	if (IS_ENABLED(CONFIG_BT_TESTING) && status == STATUS_SUCCESS) {
		bt_test_mesh_model_bound(ctx->addr, mod, key_app_idx);
	}

send_status:
	BT_DBG("status 0x%02x", status);
	create_mod_app_status(msg, mod, vnd, elem_addr, key_app_idx, status,
			      mod_id);

	if (bt_mesh_model_send(model, ctx, msg, NULL, NULL)) {
		BT_ERR("Unable to send Model App Bind Status response");
	}

done:
	os_mbuf_free_chain(msg);

	return err;
}