Function ng_deflate_rcvdata

freebsd/netgraph/ng_deflate.c:322–364

* Receive incoming data on our hook. */

 * Receive incoming data on our hook.
 */
static int
ng_deflate_rcvdata(hook_p hook, item_p item)
{
	const node_p node = NG_HOOK_NODE(hook);
	const priv_p priv = NG_NODE_PRIVATE(node);
	struct mbuf *m, *out;
	int error;

	if (!priv->cfg.enable) {
		NG_FREE_ITEM(item);
		return (ENXIO);
	}

	NGI_GET_M(item, m);
	/* Compress */
	if (priv->compress) {
		if ((error = ng_deflate_compress(node, m, &out)) != 0) {
			NG_FREE_ITEM(item);
			log(LOG_NOTICE, "%s: error: %d\n", __func__, error);
			return (error);
		}
	} else { /* Decompress */
		if ((error = ng_deflate_decompress(node, m, &out)) != 0) {
			NG_FREE_ITEM(item);
			log(LOG_NOTICE, "%s: error: %d\n", __func__, error);
			if (priv->ctrlnode != 0) {
				struct ng_mesg *msg;

				/* Need to send a reset-request. */
				NG_MKMESSAGE(msg, NGM_DEFLATE_COOKIE,
				    NGM_DEFLATE_RESETREQ, 0, M_NOWAIT);
				if (msg == NULL)
					return (error);
				NG_SEND_MSG_ID(error, node, msg,
					priv->ctrlnode, 0);
			}
			return (error);
		}
	}

	NG_FWD_NEW_DATA(error, item, hook, out);
	return (error);
}

/*
 * Destroy node.