Function ng_detach_common

freebsd/netgraph/ng_socket.c:630–659

* Disassociate the socket from it's protocol specific * partner. If it's attached to a node's private data structure, * then unlink from that too. If we were the last socket attached to it, * then shut down the entire node. Shared code for control and data sockets. */

 * then shut down the entire node. Shared code for control and data sockets.
 */
static void
ng_detach_common(struct ngpcb *pcbp, int which)
{
	struct ngsock *priv = pcbp->sockdata;

	if (priv != NULL) {
		mtx_lock(&priv->mtx);

		switch (which) {
		case NG_CONTROL:
			priv->ctlsock = NULL;
			break;
		case NG_DATA:
			priv->datasock = NULL;
			break;
		default:
			panic("%s", __func__);
		}
		pcbp->sockdata = NULL;
		pcbp->node_id = 0;

		ng_socket_free_priv(priv);
	}

	pcbp->ng_socket->so_pcb = NULL;
	mtx_lock(&ngsocketlist_mtx);
	LIST_REMOVE(pcbp, socks);
	mtx_unlock(&ngsocketlist_mtx);
	free(pcbp, M_PCB);
}

/*
 * Remove a reference from node private data.