Function ng_ppp_rcvmsg

freebsd/netgraph/ng_ppp.c:582–729

* Receive a control message */

 * Receive a control message
 */
static int
ng_ppp_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_PPP_COOKIE:
		switch (msg->header.cmd) {
		case NGM_PPP_SET_CONFIG:
		    {
			struct ng_ppp_node_conf *const conf =
			    (struct ng_ppp_node_conf *)msg->data;
			int i;

			/* Check for invalid or illegal config */
			if (msg->header.arglen != sizeof(*conf))
				ERROUT(EINVAL);
			if (!ng_ppp_config_valid(node, conf))
				ERROUT(EINVAL);

			/* Copy config */
			priv->conf = conf->bund;
			for (i = 0; i < NG_PPP_MAX_LINKS; i++)
				priv->links[i].conf = conf->links[i];
			ng_ppp_update(node, 1);
			break;
		    }
		case NGM_PPP_GET_CONFIG:
		    {
			struct ng_ppp_node_conf *conf;
			int i;

			NG_MKRESPONSE(resp, msg, sizeof(*conf), M_NOWAIT);
			if (resp == NULL)
				ERROUT(ENOMEM);
			conf = (struct ng_ppp_node_conf *)resp->data;
			conf->bund = priv->conf;
			for (i = 0; i < NG_PPP_MAX_LINKS; i++)
				conf->links[i] = priv->links[i].conf;
			break;
		    }
		case NGM_PPP_GET_MP_STATE:
		    {
			struct ng_ppp_mp_state *info;
			int i;

			NG_MKRESPONSE(resp, msg, sizeof(*info), M_NOWAIT);
			if (resp == NULL)
				ERROUT(ENOMEM);
			info = (struct ng_ppp_mp_state *)resp->data;
			bzero(info, sizeof(*info));
			for (i = 0; i < NG_PPP_MAX_LINKS; i++) {
				if (priv->links[i].seq != MP_NOSEQ)
					info->rseq[i] = priv->links[i].seq;