-
-
-
-u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
-u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
-/*
- * Add an Ethernet multicast address or range of addresses to the list for a
- * given interface.
- */
-int
-ether_addmulti(ifr, ac)
- struct ifreq *ifr;
- register struct arpcom *ac;
-{
- register struct ether_multi *enm;
- struct sockaddr_in *sin;
- u_char addrlo[6];
- u_char addrhi[6];
- int s = splimp();
-
- switch (ifr->ifr_addr.sa_family) {
-
- case AF_UNSPEC:
- bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
- bcopy(addrlo, addrhi, 6);
- break;
-
-#if INET
- case AF_INET:
- sin = (struct sockaddr_in *)&(ifr->ifr_addr);
- if (sin->sin_addr.s_addr == INADDR_ANY) {
- /*
- * An IP address of INADDR_ANY means listen to all
- * of the Ethernet multicast addresses used for IP.
- * (This is for the sake of IP multicast routers.)
- */
- bcopy(ether_ipmulticast_min, addrlo, 6);
- bcopy(ether_ipmulticast_max, addrhi, 6);
- }
- else {
- ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
- bcopy(addrlo, addrhi, 6);
- }
- break;
-#endif
-
- default:
- splx(s);
- return (EAFNOSUPPORT);
- }
-
- /*
- * Verify that we have valid Ethernet multicast addresses.
- */
- if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) {
- splx(s);
- return (EINVAL);
- }
- /*
- * See if the address range is already in the list.
- */
- ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
- if (enm != NULL) {
- /*
- * Found it; just increment the reference count.
- */
- ++enm->enm_refcount;
- splx(s);
- return (0);
- }
- /*
- * New address or range; malloc a new multicast record
- * and link it into the interface's multicast list.
- */
- enm = (struct ether_multi *)_MALLOC(sizeof(*enm), M_IFMADDR, M_WAITOK);
- if (enm == NULL) {
- splx(s);
- return (ENOBUFS);
- }
- bcopy(addrlo, enm->enm_addrlo, 6);
- bcopy(addrhi, enm->enm_addrhi, 6);
- enm->enm_ac = ac;
- enm->enm_refcount = 1;
- enm->enm_next = ac->ac_multiaddrs;
- ac->ac_multiaddrs = enm;
- splx(s);
- /*
- * Return ENETRESET to inform the driver that the list has changed
- * and its reception filter should be adjusted accordingly.
- */
- return (ENETRESET);
-}
-
-/*
- * Delete a multicast address record.
- */
-int
-ether_delmulti(ifr, ac, ret_mca)
- struct ifreq *ifr;
- register struct arpcom *ac;
- struct ether_addr * ret_mca;
-{
- register struct ether_multi *enm;
- register struct ether_multi **p;
- struct sockaddr_in *sin;
- u_char addrlo[6];
- u_char addrhi[6];
- int s = splimp();
-
- switch (ifr->ifr_addr.sa_family) {
-
- case AF_UNSPEC:
- bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
- bcopy(addrlo, addrhi, 6);
- break;
-
-#if INET
- case AF_INET:
- sin = (struct sockaddr_in *)&(ifr->ifr_addr);
- if (sin->sin_addr.s_addr == INADDR_ANY) {
- /*
- * An IP address of INADDR_ANY means stop listening
- * to the range of Ethernet multicast addresses used
- * for IP.
- */
- bcopy(ether_ipmulticast_min, addrlo, 6);
- bcopy(ether_ipmulticast_max, addrhi, 6);
- }
- else {
- ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
- bcopy(addrlo, addrhi, 6);
- }
- break;
-#endif
-
- default:
- splx(s);
- return (EAFNOSUPPORT);
- }
-
- /*
- * Look up the address in our list.
- */
- ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
- if (enm == NULL) {
- splx(s);
- return (ENXIO);
- }
- if (--enm->enm_refcount != 0) {
- /*
- * Still some claims to this record.
- */
- splx(s);
- return (0);
- }
-
- /* save the low and high address of the range before deletion */
- if (ret_mca) {
- *ret_mca = *((struct ether_addr *)addrlo);
- *(ret_mca + 1) = *((struct ether_addr *)addrhi);
- }
-
- /*
- * No remaining claims to this record; unlink and free it.
- */
- for (p = &enm->enm_ac->ac_multiaddrs;
- *p != enm;
- p = &(*p)->enm_next)
- continue;
- *p = (*p)->enm_next;
- FREE(enm, M_IFMADDR);
- splx(s);
- /*
- * Return ENETRESET to inform the driver that the list has changed
- * and its reception filter should be adjusted accordingly.
- */
- return (ENETRESET);
-}
-
projects / apple / xnu.git / blobdiff