Function del_mfc

freebsd/netinet/ip_mroute.c:1154–1187

* Delete an mfc entry */

 * Delete an mfc entry
 */
static int
del_mfc(struct mfcctl2 *mfccp)
{
    struct in_addr	origin;
    struct in_addr	mcastgrp;
    struct mfc		*rt;

    origin = mfccp->mfcc_origin;
    mcastgrp = mfccp->mfcc_mcastgrp;

    CTR3(KTR_IPMF, "%s: delete mfc orig 0x%08x group %lx", __func__,
	ntohl(origin.s_addr), (u_long)ntohl(mcastgrp.s_addr));

    MFC_LOCK();

    rt = mfc_find(&origin, &mcastgrp);
    if (rt == NULL) {
	MFC_UNLOCK();
	return EADDRNOTAVAIL;
    }

    /*
     * free the bw_meter entries
     */
    free_bw_list(rt->mfc_bw_meter);
    rt->mfc_bw_meter = NULL;

    LIST_REMOVE(rt, mfc_hash);
    free(rt, M_MRTABLE);

    MFC_UNLOCK();

    return (0);
}

/*
 * Send a message to the routing daemon on the multicast routing socket.