Function ng_ether_rcvmsg

freebsd/netgraph/ng_ether.c:491–645

* Receive an incoming control message. */

 * Receive an incoming control message.
 */
static int
ng_ether_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
	const priv_p priv = NG_NODE_PRIVATE(node);
	struct ng_mesg *resp = NULL;
	int error = 0;
	struct ng_mesg *msg;

	NGI_GET_MSG(item, msg);
	switch (msg->header.typecookie) {
	case NGM_ETHER_COOKIE:
		switch (msg->header.cmd) {
		case NGM_ETHER_GET_IFNAME:
			NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
			if (resp == NULL) {
				error = ENOMEM;
				break;
			}
			strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ);
			break;
		case NGM_ETHER_GET_IFINDEX:
			NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
			if (resp == NULL) {
				error = ENOMEM;
				break;
			}
			*((u_int32_t *)resp->data) = priv->ifp->if_index;
			break;
		case NGM_ETHER_GET_ENADDR:
			NG_MKRESPONSE(resp, msg, ETHER_ADDR_LEN, M_NOWAIT);
			if (resp == NULL) {
				error = ENOMEM;
				break;
			}
			bcopy(IF_LLADDR(priv->ifp),
			    resp->data, ETHER_ADDR_LEN);
			break;
		case NGM_ETHER_SET_ENADDR:
		    {
			if (msg->header.arglen != ETHER_ADDR_LEN) {
				error = EINVAL;
				break;
			}
			error = if_setlladdr(priv->ifp,
			    (u_char *)msg->data, ETHER_ADDR_LEN);
			break;
		    }
		case NGM_ETHER_GET_PROMISC:
			NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
			if (resp == NULL) {
				error = ENOMEM;
				break;
			}
			*((u_int32_t *)resp->data) = priv->promisc;
			break;
		case NGM_ETHER_SET_PROMISC:
		    {
			u_char want;