Function ng_ppp_update

freebsd/netgraph/ng_ppp.c:2472–2561

* Update private information that is derived from other private information */

 * Update private information that is derived from other private information
 */
static void
ng_ppp_update(node_p node, int newConf)
{
	const priv_p priv = NG_NODE_PRIVATE(node);
	int i;

	/* Update active status for VJ Compression */
	priv->vjCompHooked = priv->hooks[HOOK_INDEX_VJC_IP] != NULL
	    && priv->hooks[HOOK_INDEX_VJC_COMP] != NULL
	    && priv->hooks[HOOK_INDEX_VJC_UNCOMP] != NULL
	    && priv->hooks[HOOK_INDEX_VJC_VJIP] != NULL;

	/* Increase latency for each link an amount equal to one MP header */
	if (newConf) {
		for (i = 0; i < NG_PPP_MAX_LINKS; i++) {
			int hdrBytes;

			if (priv->links[i].conf.bandwidth == 0)
			    continue;

			hdrBytes = MP_AVERAGE_LINK_OVERHEAD
			    + (priv->links[i].conf.enableACFComp ? 0 : 2)
			    + (priv->links[i].conf.enableProtoComp ? 1 : 2)
			    + (priv->conf.xmitShortSeq ? 2 : 4);
			priv->links[i].latency =
			    priv->links[i].conf.latency +
			    (hdrBytes / priv->links[i].conf.bandwidth + 50) / 100;
		}
	}

	/* Update list of active links */
	bzero(&priv->activeLinks, sizeof(priv->activeLinks));
	priv->numActiveLinks = 0;
	priv->allLinksEqual = 1;
	for (i = 0; i < NG_PPP_MAX_LINKS; i++) {
		struct ng_ppp_link *const link = &priv->links[i];

		/* Is link active? */
		if (link->conf.enableLink && link->hook != NULL) {
			struct ng_ppp_link *link0;

			/* Add link to list of active links */
			priv->activeLinks[priv->numActiveLinks++] = i;
			link0 = &priv->links[priv->activeLinks[0]];

			/* Determine if all links are still equal */
			if (link->latency != link0->latency
			  || link->conf.bandwidth != link0->conf.bandwidth)
				priv->allLinksEqual = 0;

			/* Initialize rec'd sequence number */
			if (link->seq == MP_NOSEQ) {
				link->seq = (link == link0) ?
				    MP_INITIAL_SEQ : link0->seq;
			}
		} else
			link->seq = MP_NOSEQ;
	}