patch-2.4.22 linux-2.4.22/net/ipv6/mcast.c

• Lines: 1850
• Date: 2003-08-25 04:44:44.000000000 -0700
• Orig file: linux-2.4.21/net/ipv6/mcast.c
• Orig date: 2003-06-13 07:51:39.000000000 -0700

diff -urN linux-2.4.21/net/ipv6/mcast.c linux-2.4.22/net/ipv6/mcast.c
@@ -24,6 +24,8 @@
  *	YOSHIFUJI Hideaki @USAGI:
  *		- Ignore Queries for invalid addresses.
  *		- MLD for link-local addresses.
+ *	David L Stevens <dlstevens@us.ibm.com>:
+		- MLDv2 support
  */
 
 #include <linux/config.h>
@@ -35,6 +37,7 @@
 #include <linux/sockios.h>
 #include <linux/sched.h>
 #include <linux/net.h>
+#include <linux/in.h>
 #include <linux/in6.h>
 #include <linux/netdevice.h>
 #include <linux/if_arp.h>
@@ -63,6 +66,59 @@
 #define MDBG(x)
 #endif
 
+/*
+ *  These header formats should be in a separate include file, but icmpv6.h
+ *  doesn't have in6_addr defined in all cases, there is no __u128, and no
+ *  other files reference these.
+ *
+ *  			+-DLS 4/14/03
+ */
+
+/* Multicast Listener Discovery version 2 headers */
+
+struct mld2_grec {
+	__u8		grec_type;
+	__u8		grec_auxwords;
+	__u16		grec_nsrcs;
+	struct in6_addr	grec_mca;
+	struct in6_addr	grec_src[0];
+};
+
+struct mld2_report {
+	__u8	type;
+	__u8	resv1;
+	__u16	csum;
+	__u16	resv2;
+	__u16	ngrec;
+	struct mld2_grec grec[0];
+};
+
+struct mld2_query {
+	__u8 type;
+	__u8 code;
+	__u16 csum;
+	__u16 mrc;
+	__u16 resv1;
+	struct in6_addr mca;
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+	__u8 qrv:3,
+	     suppress:1,
+	     resv2:4;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+	__u8 resv2:4,
+	     suppress:1,
+	     qrv:3;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+	__u8 qqic;
+	__u16 nsrcs;
+	struct in6_addr srcs[0];
+};
+
+struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
+struct in6_addr all_nodes_addr = {{{0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x1}}};
+
 /* Big mc list lock for all the sockets */
 static rwlock_t ipv6_sk_mc_lock = RW_LOCK_UNLOCKED;
 
@@ -70,9 +126,39 @@
 
 static void igmp6_join_group(struct ifmcaddr6 *ma);
 static void igmp6_leave_group(struct ifmcaddr6 *ma);
-void igmp6_timer_handler(unsigned long data);
+static void igmp6_timer_handler(unsigned long data);
+
+static void mld_gq_timer_expire(unsigned long data);
+static void mld_ifc_timer_expire(unsigned long data);
+static void mld_ifc_event(struct inet6_dev *idev);
+static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
+static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
+static void mld_clear_delrec(struct inet6_dev *idev);
+static int sf_setstate(struct ifmcaddr6 *pmc);
+static void sf_markstate(struct ifmcaddr6 *pmc);
+static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
+int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
+	int sfcount, struct in6_addr *psfsrc, int delta);
+int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
+	int sfcount, struct in6_addr *psfsrc, int delta);
+int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
+	struct inet6_dev *idev);
+
 
 #define IGMP6_UNSOLICITED_IVAL	(10*HZ)
+#define MLD_QRV_DEFAULT		2
+
+#define MLD_V1_SEEN(idev) ((idev)->mc_v1_seen && \
+		time_before(jiffies, (idev)->mc_v1_seen))
+
+#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
+#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
+	((value) < (thresh) ? (value) : \
+	((MLDV2_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
+	(MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
+
+#define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
+#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
 
 /*
  *	socket join on multicast group
@@ -113,6 +199,8 @@
 	}
 
 	mc_lst->ifindex = dev->ifindex;
+	mc_lst->sfmode = MCAST_EXCLUDE;
+	mc_lst->sflist = 0;
 
 	/*
 	 *	now add/increase the group membership on the device
@@ -154,6 +242,12 @@
 			write_unlock_bh(&ipv6_sk_mc_lock);
 
 			if ((dev = dev_get_by_index(ifindex)) != NULL) {
+				struct inet6_dev *idev = in6_dev_get(dev);
+
+				if (idev) {
+					(void) ip6_mc_leave_src(sk,mc_lst,idev);
+					in6_dev_put(idev);
+				}
 				ipv6_dev_mc_dec(dev, &mc_lst->addr);
 				dev_put(dev);
 			}
@@ -166,6 +260,40 @@
 	return -ENOENT;
 }
 
+struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
+{
+	struct net_device *dev = 0;
+	struct inet6_dev *idev = 0;
+
+	if (ifindex == 0) {
+		struct rt6_info *rt;
+
+		rt = rt6_lookup(group, NULL, 0, 0);
+		if (rt) {
+			dev = rt->rt6i_dev;
+			dev_hold(dev);
+			dst_release(&rt->u.dst);
+		}
+	} else
+		dev = dev_get_by_index(ifindex);
+
+	if (!dev)
+		return 0;
+	idev = in6_dev_get(dev);
+	if (!idev) {
+		dev_put(dev);
+		return 0;
+	}
+	read_lock_bh(&idev->lock);
+	if (idev->dead) {
+		read_unlock_bh(&idev->lock);
+		in6_dev_put(idev);
+		dev_put(dev);
+		return 0;
+	}
+	return idev;
+}
+
 void ipv6_sock_mc_close(struct sock *sk)
 {
 	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
@@ -180,6 +308,12 @@
 
 		dev = dev_get_by_index(mc_lst->ifindex);
 		if (dev) {
+			struct inet6_dev *idev = in6_dev_get(dev);
+
+			if (idev) {
+				(void) ip6_mc_leave_src(sk, mc_lst, idev);
+				in6_dev_put(idev);
+			}
 			ipv6_dev_mc_dec(dev, &mc_lst->addr);
 			dev_put(dev);
 		}
@@ -191,20 +325,293 @@
 	write_unlock_bh(&ipv6_sk_mc_lock);
 }
 
-int inet6_mc_check(struct sock *sk, struct in6_addr *addr)
+int ip6_mc_source(int add, int omode, struct sock *sk,
+	struct group_source_req *pgsr)
+{
+	struct in6_addr *source, *group;
+	struct ipv6_mc_socklist *pmc;
+	struct net_device *dev;
+	struct inet6_dev *idev;
+	struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
+	struct ip6_sf_socklist *psl;
+	int i, j, rv;
+	int err;
+
+	if (pgsr->gsr_group.ss_family != AF_INET6 ||
+	    pgsr->gsr_source.ss_family != AF_INET6)
+		return -EINVAL;
+
+	source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
+	group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
+
+	if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
+		return -EINVAL;
+
+	idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
+	if (!idev)
+		return -ENODEV;
+	dev = idev->dev;
+
+	err = -EADDRNOTAVAIL;
+
+	for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
+		if (pmc->ifindex != pgsr->gsr_interface)
+			continue;
+		if (ipv6_addr_cmp(&pmc->addr, group) == 0)
+			break;
+	}
+	if (!pmc)		/* must have a prior join */
+		goto done;
+	/* if a source filter was set, must be the same mode as before */
+	if (pmc->sflist) {
+		if (pmc->sfmode != omode)
+			goto done;
+	} else if (pmc->sfmode != omode) {
+		/* allow mode switches for empty-set filters */
+		ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
+		pmc->sfmode = omode;
+		ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
+	}
+
+	psl = pmc->sflist;
+	if (!add) {
+		if (!psl)
+			goto done;
+		rv = !0;
+		for (i=0; i<psl->sl_count; i++) {
+			rv = memcmp(&psl->sl_addr, group,
+				sizeof(struct in6_addr));
+			if (rv >= 0)
+				break;
+		}
+		if (!rv)	/* source not found */
+			goto done;
+
+		/* update the interface filter */
+		ip6_mc_del_src(idev, group, omode, 1, source, 1);
+
+		for (j=i+1; j<psl->sl_count; j++)
+			psl->sl_addr[j-1] = psl->sl_addr[j];
+		psl->sl_count--;
+		err = 0;
+		goto done;
+	}
+	/* else, add a new source to the filter */
+
+	if (!psl || psl->sl_count == psl->sl_max) {
+		struct ip6_sf_socklist *newpsl;
+		int count = IP6_SFBLOCK;
+
+		if (psl)
+			count += psl->sl_max;
+		newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
+			IP6_SFLSIZE(count), GFP_ATOMIC);
+		if (!newpsl) {
+			err = -ENOBUFS;
+			goto done;
+		}
+		newpsl->sl_max = count;
+		newpsl->sl_count = count - IP6_SFBLOCK;
+		if (psl) {
+			for (i=0; i<psl->sl_count; i++)
+				newpsl->sl_addr[i] = psl->sl_addr[i];
+			sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
+		}
+		pmc->sflist = psl = newpsl;
+	}
+	rv = 1;	/* > 0 for insert logic below if sl_count is 0 */
+	for (i=0; i<psl->sl_count; i++) {
+		rv = memcmp(&psl->sl_addr, group, sizeof(struct in6_addr));
+		if (rv >= 0)
+			break;
+	}
+	if (rv == 0)		/* address already there is an error */
+		goto done;
+	for (j=psl->sl_count-1; j>=i; j--)
+		psl->sl_addr[j+1] = psl->sl_addr[j];
+	psl->sl_addr[i] = *source;
+	psl->sl_count++;
+	err = 0;
+	/* update the interface list */
+	ip6_mc_add_src(idev, group, omode, 1, source, 1);
+done:
+	read_unlock_bh(&idev->lock);
+	in6_dev_put(idev);
+	dev_put(dev);
+	return err;
+}
+
+int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
+{
+	struct in6_addr *group;
+	struct ipv6_mc_socklist *pmc;
+	struct net_device *dev;
+	struct inet6_dev *idev;
+	struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
+	struct ip6_sf_socklist *newpsl, *psl;
+	int i, err;
+
+	group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
+
+	if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
+		return -EINVAL;
+	if (gsf->gf_fmode != MCAST_INCLUDE &&
+	    gsf->gf_fmode != MCAST_EXCLUDE)
+		return -EINVAL;
+
+	idev = ip6_mc_find_dev(group, gsf->gf_interface);
+
+	if (!idev)
+		return -ENODEV;
+	dev = idev->dev;
+	err = -EADDRNOTAVAIL;
+
+	for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
+		if (pmc->ifindex != gsf->gf_interface)
+			continue;
+		if (ipv6_addr_cmp(&pmc->addr, group) == 0)
+			break;
+	}
+	if (!pmc)		/* must have a prior join */
+		goto done;
+	if (gsf->gf_numsrc) {
+		newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
+				IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
+		if (!newpsl) {
+			err = -ENOBUFS;
+			goto done;
+		}
+		newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
+		for (i=0; i<newpsl->sl_count; ++i) {
+			struct sockaddr_in6 *psin6;
+
+			psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
+			newpsl->sl_addr[i] = psin6->sin6_addr;
+		}
+		err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
+			newpsl->sl_count, newpsl->sl_addr, 0);
+		if (err) {
+			sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
+			goto done;
+		}
+	} else
+		newpsl = 0;
+	psl = pmc->sflist;
+	if (psl) {
+		(void) ip6_mc_del_src(idev, group, pmc->sfmode,
+			psl->sl_count, psl->sl_addr, 0);
+		sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
+	} else
+		(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
+	pmc->sflist = newpsl;
+	pmc->sfmode = gsf->gf_fmode;
+done:
+	read_unlock_bh(&idev->lock);
+	in6_dev_put(idev);
+	dev_put(dev);
+	return err;
+}
+
+int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
+	struct group_filter *optval, int *optlen)
 {
+	int err, i, count, copycount;
+	struct in6_addr *group;
+	struct ipv6_mc_socklist *pmc;
+	struct inet6_dev *idev;
+	struct net_device *dev;
+	struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
+	struct ip6_sf_socklist *psl;
+
+	group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
+
+	if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
+		return -EINVAL;
+
+	idev = ip6_mc_find_dev(group, gsf->gf_interface);
+
+	if (!idev)
+		return -ENODEV;
+
+	dev = idev->dev;
+
+	err = -EADDRNOTAVAIL;
+
+	for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
+		if (pmc->ifindex != gsf->gf_interface)
+			continue;
+		if (ipv6_addr_cmp(group, &pmc->addr) == 0)
+			break;
+	}
+	if (!pmc)		/* must have a prior join */
+		goto done;
+	gsf->gf_fmode = pmc->sfmode;
+	psl = pmc->sflist;
+	count = psl ? psl->sl_count : 0;
+	read_unlock_bh(&idev->lock);
+	in6_dev_put(idev);
+	dev_put(dev);
+
+	copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
+	gsf->gf_numsrc = count;
+	if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
+	    copy_to_user((void *)optval, gsf, GROUP_FILTER_SIZE(0))) {
+		return -EFAULT;
+	}
+	for (i=0; i<copycount; i++) {
+		struct sockaddr_in6 *psin6;
+		struct sockaddr_storage ss;
+
+		psin6 = (struct sockaddr_in6 *)&ss;
+		memset(&ss, 0, sizeof(ss));
+		psin6->sin6_family = AF_INET6;
+		psin6->sin6_addr = psl->sl_addr[i];
+	    	if (copy_to_user((void *)&optval->gf_slist[i], &ss, sizeof(ss)))
+			return -EFAULT;
+	}
+	return 0;
+done:
+	read_unlock_bh(&idev->lock);
+	in6_dev_put(idev);
+	dev_put(dev);
+	return err;
+}
+
+int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
+	struct in6_addr *src_addr)
+{
+	struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
 	struct ipv6_mc_socklist *mc;
+	struct ip6_sf_socklist *psl;
+	int rv = 1;
 
 	read_lock(&ipv6_sk_mc_lock);
-	for (mc = sk->net_pinfo.af_inet6.ipv6_mc_list; mc; mc=mc->next) {
-		if (ipv6_addr_cmp(&mc->addr, addr) == 0) {
-			read_unlock(&ipv6_sk_mc_lock);
-			return 1;
+	for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
+		if (ipv6_addr_cmp(&mc->addr, mc_addr) == 0)
+			break;
+	}
+	if (!mc) {
+		read_unlock(&ipv6_sk_mc_lock);
+		return 1;
+	}
+	psl = mc->sflist;
+	if (!psl) {
+		rv = mc->sfmode == MCAST_EXCLUDE;
+	} else {
+		int i;
+
+		for (i=0; i<psl->sl_count; i++) {
+			if (ipv6_addr_cmp(&psl->sl_addr[i], src_addr) == 0)
+				break;
 		}
+		if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count);
+			rv = 0;
+		if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count);
+			rv = 0;
 	}
 	read_unlock(&ipv6_sk_mc_lock);
 
-	return 0;
+	return rv;
 }
 
 static void ma_put(struct ifmcaddr6 *mc)
@@ -215,7 +622,7 @@
 	}
 }
 
-static int igmp6_group_added(struct ifmcaddr6 *mc)
+static void igmp6_group_added(struct ifmcaddr6 *mc)
 {
 	struct net_device *dev = mc->idev->dev;
 	char buf[MAX_ADDR_LEN];
@@ -228,12 +635,20 @@
 	}
 	spin_unlock_bh(&mc->mca_lock);
 
-	if (dev->flags&IFF_UP)
+	if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
+		return;
+
+	if (MLD_V1_SEEN(mc->idev)) {
 		igmp6_join_group(mc);
-	return 0;
+		return;
+	}
+	/* else v2 */
+
+	mc->mca_crcount = mc->idev->mc_qrv;
+	mld_ifc_event(mc->idev);
 }
 
-static int igmp6_group_dropped(struct ifmcaddr6 *mc)
+static void igmp6_group_dropped(struct ifmcaddr6 *mc)
 {
 	struct net_device *dev = mc->idev->dev;
 	char buf[MAX_ADDR_LEN];
@@ -244,11 +659,123 @@
 		if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
 			dev_mc_delete(dev, buf, dev->addr_len, 0);
 	}
+
+	if (mc->mca_flags & MAF_NOREPORT)
+		goto done;
 	spin_unlock_bh(&mc->mca_lock);
 
 	if (dev->flags&IFF_UP)
 		igmp6_leave_group(mc);
-	return 0;
+
+	spin_lock_bh(&mc->mca_lock);
+	if (del_timer(&mc->mca_timer))
+		atomic_dec(&mc->mca_refcnt);
+done:
+	ip6_mc_clear_src(mc);
+	spin_unlock_bh(&mc->mca_lock);
+}
+
+/*
+ * deleted ifmcaddr6 manipulation
+ */
+static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
+{
+	struct ifmcaddr6 *pmc;
+
+	/* this is an "ifmcaddr6" for convenience; only the fields below
+	 * are actually used. In particular, the refcnt and users are not
+	 * used for management of the delete list. Using the same structure
+	 * for deleted items allows change reports to use common code with
+	 * non-deleted or query-response MCA's.
+	 */
+	pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC);
+	if (!pmc)
+		return;
+	memset(pmc, 0, sizeof(*pmc));
+	spin_lock_bh(&im->mca_lock);
+	pmc->mca_lock = SPIN_LOCK_UNLOCKED;
+	pmc->idev = im->idev;
+	in6_dev_hold(idev);
+	pmc->mca_addr = im->mca_addr;
+	pmc->mca_crcount = idev->mc_qrv;
+	pmc->mca_sfmode = im->mca_sfmode;
+	if (pmc->mca_sfmode == MCAST_INCLUDE) {
+		struct ip6_sf_list *psf;
+
+		pmc->mca_tomb = im->mca_tomb;
+		pmc->mca_sources = im->mca_sources;
+		im->mca_tomb = im->mca_sources = 0;
+		for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
+			psf->sf_crcount = pmc->mca_crcount;
+	}
+	spin_unlock_bh(&im->mca_lock);
+
+	write_lock_bh(&idev->mc_lock);
+	pmc->next = idev->mc_tomb;
+	idev->mc_tomb = pmc;
+	write_unlock_bh(&idev->mc_lock);
+}
+
+static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
+{
+	struct ifmcaddr6 *pmc, *pmc_prev;
+	struct ip6_sf_list *psf, *psf_next;
+
+	write_lock_bh(&idev->mc_lock);
+	pmc_prev = 0;
+	for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
+		if (ipv6_addr_cmp(&pmc->mca_addr, pmca) == 0)
+			break;
+		pmc_prev = pmc;
+	}
+	if (pmc) {
+		if (pmc_prev)
+			pmc_prev->next = pmc->next;
+		else
+			idev->mc_tomb = pmc->next;
+	}
+	write_unlock_bh(&idev->mc_lock);
+	if (pmc) {
+		for (psf=pmc->mca_tomb; psf; psf=psf_next) {
+			psf_next = psf->sf_next;
+			kfree(psf);
+		}
+		in6_dev_put(pmc->idev);
+		kfree(pmc);
+	}
+}
+
+static void mld_clear_delrec(struct inet6_dev *idev)
+{
+	struct ifmcaddr6 *pmc, *nextpmc;
+
+	write_lock_bh(&idev->mc_lock);
+	pmc = idev->mc_tomb;
+	idev->mc_tomb = 0;
+	write_unlock_bh(&idev->mc_lock);
+
+	for (; pmc; pmc = nextpmc) {
+		nextpmc = pmc->next;
+		ip6_mc_clear_src(pmc);
+		in6_dev_put(pmc->idev);
+		kfree(pmc);
+	}
+
+	/* clear dead sources, too */
+	read_lock_bh(&idev->lock);
+	for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
+		struct ip6_sf_list *psf, *psf_next;
+
+		spin_lock_bh(&pmc->mca_lock);
+		psf = pmc->mca_tomb;
+		pmc->mca_tomb = 0;
+		spin_unlock_bh(&pmc->mca_lock);
+		for (; psf; psf=psf_next) {
+			psf_next = psf->sf_next;
+			kfree(psf);
+		}
+	}
+	read_unlock_bh(&idev->lock);
 }
 
 
@@ -276,6 +803,8 @@
 		if (ipv6_addr_cmp(&mc->mca_addr, addr) == 0) {
 			mc->mca_users++;
 			write_unlock_bh(&idev->lock);
+			ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
+				0, 0);
 			in6_dev_put(idev);
 			return 0;
 		}
@@ -303,10 +832,19 @@
 	atomic_set(&mc->mca_refcnt, 2);
 	mc->mca_lock = SPIN_LOCK_UNLOCKED;
 
+	/* initial mode is (EX, empty) */
+	mc->mca_sfmode = MCAST_EXCLUDE;
+	mc->mca_sfcount[MCAST_EXCLUDE] = 1;
+
+	if (ipv6_addr_cmp(&mc->mca_addr, &all_nodes_addr) == 0 ||
+	    IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
+		mc->mca_flags |= MAF_NOREPORT;
+
 	mc->next = idev->mc_list;
 	idev->mc_list = mc;
 	write_unlock_bh(&idev->lock);
 
+	mld_del_delrec(idev, &mc->mca_addr);
 	igmp6_group_added(mc);
 	ma_put(mc);
 	return 0;
@@ -315,15 +853,10 @@
 /*
  *	device multicast group del
  */
-int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
+static int __ipv6_dev_mc_dec(struct net_device *dev, struct inet6_dev *idev, struct in6_addr *addr)
 {
-	struct inet6_dev *idev;
 	struct ifmcaddr6 *ma, **map;
 
-	idev = in6_dev_get(dev);
-	if (idev == NULL)
-		return -ENODEV;
-
 	write_lock_bh(&idev->lock);
 	for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
 		if (ipv6_addr_cmp(&ma->mca_addr, addr) == 0) {
@@ -334,42 +867,86 @@
 				igmp6_group_dropped(ma);
 
 				ma_put(ma);
-				in6_dev_put(idev);
 				return 0;
 			}
 			write_unlock_bh(&idev->lock);
-			in6_dev_put(idev);
 			return 0;
 		}
 	}
 	write_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
 
 	return -ENOENT;
 }
 
+int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
+{
+	struct inet6_dev *idev = in6_dev_get(dev);
+	int err;
+
+	if (!idev)
+		return -ENODEV;
+
+	err = __ipv6_dev_mc_dec(dev, idev, addr);
+
+	in6_dev_put(idev);
+
+	return err;
+}
+
 /*
  *	check if the interface/address pair is valid
  */
-int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *addr)
+int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
+	struct in6_addr *src_addr)
 {
 	struct inet6_dev *idev;
 	struct ifmcaddr6 *mc;
+	int rv = 0;
 
 	idev = in6_dev_get(dev);
 	if (idev) {
 		read_lock_bh(&idev->lock);
 		for (mc = idev->mc_list; mc; mc=mc->next) {
-			if (ipv6_addr_cmp(&mc->mca_addr, addr) == 0) {
-				read_unlock_bh(&idev->lock);
-				in6_dev_put(idev);
-				return 1;
+			if (ipv6_addr_cmp(&mc->mca_addr, group) == 0)
+				break;
+		}
+		if (mc) {
+			struct ip6_sf_list *psf;
+
+			spin_lock_bh(&mc->mca_lock);
+			for (psf=mc->mca_sources; psf; psf=psf->sf_next) {
+				if (ipv6_addr_cmp(&psf->sf_addr, src_addr) == 0)
+					break;
 			}
+			if (psf)
+				rv = psf->sf_count[MCAST_INCLUDE] ||
+					psf->sf_count[MCAST_EXCLUDE] !=
+					mc->mca_sfcount[MCAST_EXCLUDE];
+			else
+				rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0;
+			spin_unlock_bh(&mc->mca_lock);
 		}
 		read_unlock_bh(&idev->lock);
 		in6_dev_put(idev);
 	}
-	return 0;
+	return rv;
+}
+
+static void mld_gq_start_timer(struct inet6_dev *idev)
+{
+	int tv = net_random() % idev->mc_maxdelay;
+
+	idev->mc_gq_running = 1;
+	if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
+		in6_dev_hold(idev);
+}
+
+static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
+{
+	int tv = net_random() % delay;
+
+	if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
+		in6_dev_hold(idev);
 }
 
 /*
@@ -384,7 +961,6 @@
 	if (ipv6_addr_type(&ma->mca_addr)&(IPV6_ADDR_LINKLOCAL|IPV6_ADDR_LOOPBACK))
 		return;
 
-	spin_lock(&ma->mca_lock);
 	if (del_timer(&ma->mca_timer)) {
 		atomic_dec(&ma->mca_refcnt);
 		delay = ma->mca_timer.expires - jiffies;
@@ -403,53 +979,134 @@
 	spin_unlock(&ma->mca_lock);
 }
 
+static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
+	struct in6_addr *srcs)
+{
+	struct ip6_sf_list *psf;
+	int i, scount;
+
+	scount = 0;
+	for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+		if (scount == nsrcs)
+			break;
+		for (i=0; i<nsrcs; i++)
+			if (ipv6_addr_cmp(&srcs[i], &psf->sf_addr) == 0) {
+				psf->sf_gsresp = 1;
+				scount++;
+				break;
+			}
+	}
+}
+
 int igmp6_event_query(struct sk_buff *skb)
 {
+	struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
 	struct ifmcaddr6 *ma;
-	struct in6_addr *addrp;
-	unsigned long resptime;
+	struct in6_addr *group;
+	unsigned long max_delay;
 	struct inet6_dev *idev;
 	struct icmp6hdr *hdr;
-	int addr_type;
+	int group_type;
+	int mark = 0;
+	int len;
 
 	if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
 		return -EINVAL;
 
-	hdr = (struct icmp6hdr*) skb->h.raw;
+	len = ntohs(skb->nh.ipv6h->payload_len);
 
 	/* Drop queries with not link local source */
 	if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
 		return -EINVAL;
 
-	resptime = ntohs(hdr->icmp6_maxdelay);
-	/* Translate milliseconds to jiffies */
-	resptime = (resptime<<10)/(1024000/HZ);
-
-	addrp = (struct in6_addr *) (hdr + 1);
-	addr_type = ipv6_addr_type(addrp);
-
-	if (addr_type != IPV6_ADDR_ANY &&
-	    !(addr_type&IPV6_ADDR_MULTICAST))
-		return -EINVAL;
-
 	idev = in6_dev_get(skb->dev);
 
 	if (idev == NULL)
 		return 0;
 
-	read_lock(&idev->lock);
-	if (addr_type == IPV6_ADDR_ANY) {
-		for (ma = idev->mc_list; ma; ma=ma->next)
-			igmp6_group_queried(ma, resptime);
+	hdr = (struct icmp6hdr *) skb->h.raw;
+	group = (struct in6_addr *) (hdr + 1);
+	group_type = ipv6_addr_type(group);
+
+	if (group_type != IPV6_ADDR_ANY &&
+	    !(group_type&IPV6_ADDR_MULTICAST)) {
+		in6_dev_put(idev);
+		return -EINVAL;
+	}
+
+	if (len == 24) {
+		int switchback;
+		/* MLDv1 router present */
+
+		/* Translate milliseconds to jiffies */
+		max_delay = ntohs(hdr->icmp6_maxdelay)*(HZ/10);
+
+		switchback = (idev->mc_qrv + 1) * max_delay;
+		idev->mc_v1_seen = jiffies + switchback;
+
+		/* cancel the interface change timer */
+		idev->mc_ifc_count = 0;
+		if (del_timer(&idev->mc_ifc_timer))
+			__in6_dev_put(idev);
+		/* clear deleted report items */
+		mld_clear_delrec(idev);
+	} else if (len >= 28) {
+		max_delay = MLDV2_MRC(ntohs(mlh2->mrc))*(HZ/10);
+		if (!max_delay)
+			max_delay = 1;
+		idev->mc_maxdelay = max_delay;
+		if (mlh2->qrv)
+			idev->mc_qrv = mlh2->qrv;
+		if (group_type == IPV6_ADDR_ANY) { /* general query */
+			if (mlh2->nsrcs) {
+				in6_dev_put(idev);
+				return -EINVAL; /* no sources allowed */
+			}
+			mld_gq_start_timer(idev);
+			in6_dev_put(idev);
+			return 0;
+		}
+		/* mark sources to include, if group & source-specific */
+		mark = mlh2->nsrcs != 0;
+	} else {
+		in6_dev_put(idev);
+		return -EINVAL;
+	}
+
+	read_lock_bh(&idev->lock);
+	if (group_type == IPV6_ADDR_ANY) {
+		for (ma = idev->mc_list; ma; ma=ma->next) {
+			spin_lock_bh(&ma->mca_lock);
+			igmp6_group_queried(ma, max_delay);
+			spin_unlock_bh(&ma->mca_lock);
+		}
 	} else {
 		for (ma = idev->mc_list; ma; ma=ma->next) {
-			if (ipv6_addr_cmp(addrp, &ma->mca_addr) == 0) {
-				igmp6_group_queried(ma, resptime);
-				break;
+			if (group_type != IPV6_ADDR_ANY &&
+			    ipv6_addr_cmp(group, &ma->mca_addr) != 0)
+				continue;
+			spin_lock_bh(&ma->mca_lock);
+			if (ma->mca_flags & MAF_TIMER_RUNNING) {
+				/* gsquery <- gsquery && mark */
+				if (!mark)
+					ma->mca_flags &= ~MAF_GSQUERY;
+			} else {
+				/* gsquery <- mark */
+				if (mark)
+					ma->mca_flags |= MAF_GSQUERY;
+				else
+					ma->mca_flags &= ~MAF_GSQUERY;
 			}
+			if (ma->mca_flags & MAF_GSQUERY)
+				mld_marksources(ma, ntohs(mlh2->nsrcs),
+					mlh2->srcs);
+			igmp6_group_queried(ma, max_delay);
+			spin_unlock_bh(&ma->mca_lock);
+			if (group_type != IPV6_ADDR_ANY)
+				break;
 		}
 	}
-	read_unlock(&idev->lock);
+	read_unlock_bh(&idev->lock);
 	in6_dev_put(idev);
 
 	return 0;
@@ -489,7 +1146,7 @@
 	 *	Cancel the timer for this group
 	 */
 
-	read_lock(&idev->lock);
+	read_lock_bh(&idev->lock);
 	for (ma = idev->mc_list; ma; ma=ma->next) {
 		if (ipv6_addr_cmp(&ma->mca_addr, addrp) == 0) {
 			spin_lock(&ma->mca_lock);
@@ -500,11 +1157,385 @@
 			break;
 		}
 	}
-	read_unlock(&idev->lock);
+	read_unlock_bh(&idev->lock);
 	in6_dev_put(idev);
 	return 0;
 }
 
+static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
+	int gdeleted, int sdeleted)
+{
+	switch (type) {
+	case MLD2_MODE_IS_INCLUDE:
+	case MLD2_MODE_IS_EXCLUDE:
+		if (gdeleted || sdeleted)
+			return 0;
+		return !((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp);
+	case MLD2_CHANGE_TO_INCLUDE:
+		if (gdeleted || sdeleted)
+			return 0;
+		return psf->sf_count[MCAST_INCLUDE] != 0;
+	case MLD2_CHANGE_TO_EXCLUDE:
+		if (gdeleted || sdeleted)
+			return 0;
+		if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
+		    psf->sf_count[MCAST_INCLUDE])
+			return 0;
+		return pmc->mca_sfcount[MCAST_EXCLUDE] ==
+			psf->sf_count[MCAST_EXCLUDE];
+	case MLD2_ALLOW_NEW_SOURCES:
+		if (gdeleted || !psf->sf_crcount)
+			return 0;
+		return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
+	case MLD2_BLOCK_OLD_SOURCES:
+		if (pmc->mca_sfmode == MCAST_INCLUDE)
+			return gdeleted || (psf->sf_crcount && sdeleted);
+		return psf->sf_crcount && !gdeleted && !sdeleted;
+	}
+	return 0;
+}
+
+static int
+mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
+{
+	struct ip6_sf_list *psf;
+	int scount = 0;
+
+	for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+		if (!is_in(pmc, psf, type, gdeleted, sdeleted))
+			continue;
+		scount++;
+	}
+	return scount;
+}
+
+static struct sk_buff *mld_newpack(struct net_device *dev, int size)
+{
+	struct sock *sk = igmp6_socket->sk;
+	struct sk_buff *skb;
+	struct mld2_report *pmr;
+	struct in6_addr addr_buf;
+	int err;
+	u8 ra[8] = { IPPROTO_ICMPV6, 0,
+		     IPV6_TLV_ROUTERALERT, 2, 0, 0,
+		     IPV6_TLV_PADN, 0 };
+
+	skb = sock_alloc_send_skb(sk, size + dev->hard_header_len+15, 1, &err);
+
+	if (skb == 0)
+		return 0;
+
+	skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
+	if (dev->hard_header) {
+		unsigned char ha[MAX_ADDR_LEN];
+
+		ndisc_mc_map(&mld2_all_mcr, ha, dev, 1);
+		if (dev->hard_header(skb, dev, ETH_P_IPV6,ha,NULL,size) < 0) {
+			kfree_skb(skb);
+			return 0;
+		}
+	}
+
+	if (ipv6_get_lladdr(dev, &addr_buf)) {
+		/* <draft-ietf-magma-mld-source-02.txt>:
+		 * use unspecified address as the source address 
+		 * when a valid link-local address is not available.
+		 */
+		memset(&addr_buf, 0, sizeof(addr_buf));
+	}
+
+	ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
+
+	memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
+
+	pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr));
+	skb->h.raw = (unsigned char *)pmr;
+	pmr->type = ICMPV6_MLD2_REPORT;
+	pmr->resv1 = 0;
+	pmr->csum = 0;
+	pmr->resv2 = 0;
+	pmr->ngrec = 0;
+	return skb;
+}
+
+static void mld_sendpack(struct sk_buff *skb)
+{
+	struct ipv6hdr *pip6 = skb->nh.ipv6h;
+	struct mld2_report *pmr = (struct mld2_report *)skb->h.raw;
+	int payload_len, mldlen;
+
+	payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h -
+		sizeof(struct ipv6hdr);
+	mldlen = skb->tail - skb->h.raw;
+	pip6->payload_len = htons(payload_len);
+
+	pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
+		IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
+	dev_queue_xmit(skb);
+	ICMP6_INC_STATS(Icmp6OutMsgs);
+}
+
+static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
+{
+	return sizeof(struct mld2_grec) + 4*mld_scount(pmc,type,gdel,sdel);
+}
+
+static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
+	int type, struct mld2_grec **ppgr)
+{
+	struct net_device *dev = pmc->idev->dev;
+	struct mld2_report *pmr;
+	struct mld2_grec *pgr;
+
+	if (!skb)
+		skb = mld_newpack(dev, dev->mtu);
+	if (!skb)
+		return 0;
+	pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
+	pgr->grec_type = type;
+	pgr->grec_auxwords = 0;
+	pgr->grec_nsrcs = 0;
+	pgr->grec_mca = pmc->mca_addr;	/* structure copy */
+	pmr = (struct mld2_report *)skb->h.raw;
+	pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
+	*ppgr = pgr;
+	return skb;
+}
+
+#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
+	skb_tailroom(skb)) : 0)
+
+static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
+	int type, int gdeleted, int sdeleted)
+{
+	struct net_device *dev = pmc->idev->dev;
+	struct mld2_report *pmr;
+	struct mld2_grec *pgr = 0;
+	struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
+	int scount, first, isquery, truncate;
+
+	if (pmc->mca_flags & MAF_NOREPORT)
+		return skb;
+
+	isquery = type == MLD2_MODE_IS_INCLUDE ||
+		  type == MLD2_MODE_IS_EXCLUDE;
+	truncate = type == MLD2_MODE_IS_EXCLUDE ||
+		    type == MLD2_CHANGE_TO_EXCLUDE;
+
+	psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
+
+	if (!*psf_list) {
+		if (type == MLD2_ALLOW_NEW_SOURCES ||
+		    type == MLD2_BLOCK_OLD_SOURCES)
+			return skb;
+		if (pmc->mca_crcount || isquery) {
+			/* make sure we have room for group header and at
+			 * least one source.
+			 */
+			if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)+
+			    sizeof(struct in6_addr)) {
+				mld_sendpack(skb);
+				skb = 0; /* add_grhead will get a new one */
+			}
+			skb = add_grhead(skb, pmc, type, &pgr);
+		}
+		return skb;
+	}
+	pmr = skb ? (struct mld2_report *)skb->h.raw : 0;
+
+	/* EX and TO_EX get a fresh packet, if needed */
+	if (truncate) {
+		if (pmr && pmr->ngrec &&
+		    AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
+			if (skb)
+				mld_sendpack(skb);
+			skb = mld_newpack(dev, dev->mtu);
+		}
+	}
+	first = 1;
+	scount = 0;
+	psf_prev = 0;
+	for (psf=*psf_list; psf; psf=psf_next) {
+		struct in6_addr *psrc;
+
+		psf_next = psf->sf_next;
+
+		if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
+			psf_prev = psf;
+			continue;
+		}
+
+		/* clear marks on query responses */
+		if (isquery)
+			psf->sf_gsresp = 0;
+
+		if (AVAILABLE(skb) < sizeof(*psrc) +
+		    first*sizeof(struct mld2_grec)) {
+			if (truncate && !first)
+				break;	 /* truncate these */
+			if (pgr)
+				pgr->grec_nsrcs = htons(scount);
+			if (skb)
+				mld_sendpack(skb);
+			skb = mld_newpack(dev, dev->mtu);
+			first = 1;
+			scount = 0;
+		}
+		if (first) {
+			skb = add_grhead(skb, pmc, type, &pgr);
+			first = 0;
+		}
+		psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
+		*psrc = psf->sf_addr;
+		scount++;
+		if ((type == MLD2_ALLOW_NEW_SOURCES ||
+		     type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
+			psf->sf_crcount--;
+			if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
+				if (psf_prev)
+					psf_prev->sf_next = psf->sf_next;
+				else
+					*psf_list = psf->sf_next;
+				kfree(psf);
+				continue;
+			}
+		}
+		psf_prev = psf;
+	}
+	if (pgr)
+		pgr->grec_nsrcs = htons(scount);
+
+	if (isquery)
+		pmc->mca_flags &= ~MAF_GSQUERY;	/* clear query state */
+	return skb;
+}
+
+static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
+{
+	struct sk_buff *skb = 0;
+	int type;
+
+	if (!pmc) {
+		read_lock_bh(&idev->lock);
+		for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
+			if (pmc->mca_flags & MAF_NOREPORT)
+				continue;
+			spin_lock_bh(&pmc->mca_lock);
+			if (pmc->mca_sfcount[MCAST_EXCLUDE])
+				type = MLD2_MODE_IS_EXCLUDE;
+			else
+				type = MLD2_MODE_IS_INCLUDE;
+			skb = add_grec(skb, pmc, type, 0, 0);
+			spin_unlock_bh(&pmc->mca_lock);
+		}
+		read_unlock_bh(&idev->lock);
+	} else {
+		spin_lock_bh(&pmc->mca_lock);
+		if (pmc->mca_sfcount[MCAST_EXCLUDE])
+			type = MLD2_MODE_IS_EXCLUDE;
+		else
+			type = MLD2_MODE_IS_INCLUDE;
+		skb = add_grec(skb, pmc, type, 0, 0);
+		spin_unlock_bh(&pmc->mca_lock);
+	}
+	if (skb)
+		mld_sendpack(skb);
+}
+
+/*
+ * remove zero-count source records from a source filter list
+ */
+static void mld_clear_zeros(struct ip6_sf_list **ppsf)
+{
+	struct ip6_sf_list *psf_prev, *psf_next, *psf;
+
+	psf_prev = 0;
+	for (psf=*ppsf; psf; psf = psf_next) {
+		psf_next = psf->sf_next;
+		if (psf->sf_crcount == 0) {
+			if (psf_prev)
+				psf_prev->sf_next = psf->sf_next;
+			else
+				*ppsf = psf->sf_next;
+			kfree(psf);
+		} else
+			psf_prev = psf;
+	}
+}
+
+static void mld_send_cr(struct inet6_dev *idev)
+{
+	struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
+	struct sk_buff *skb = 0;
+	int type, dtype;
+
+	read_lock_bh(&idev->lock);
+	write_lock_bh(&idev->mc_lock);
+
+	/* deleted MCA's */
+	pmc_prev = 0;
+	for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
+		pmc_next = pmc->next;
+		if (pmc->mca_sfmode == MCAST_INCLUDE) {
+			type = MLD2_BLOCK_OLD_SOURCES;
+			dtype = MLD2_BLOCK_OLD_SOURCES;
+			skb = add_grec(skb, pmc, type, 1, 0);
+			skb = add_grec(skb, pmc, dtype, 1, 1);
+		}
+		if (pmc->mca_crcount) {
+			pmc->mca_crcount--;
+			if (pmc->mca_sfmode == MCAST_EXCLUDE) {
+				type = MLD2_CHANGE_TO_INCLUDE;
+				skb = add_grec(skb, pmc, type, 1, 0);
+			}
+			if (pmc->mca_crcount == 0) {
+				mld_clear_zeros(&pmc->mca_tomb);
+				mld_clear_zeros(&pmc->mca_sources);
+			}
+		}
+		if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
+		    !pmc->mca_sources) {
+			if (pmc_prev)
+				pmc_prev->next = pmc_next;
+			else
+				idev->mc_tomb = pmc_next;
+			in6_dev_put(pmc->idev);
+			kfree(pmc);
+		} else
+			pmc_prev = pmc;
+	}
+	write_unlock_bh(&idev->mc_lock);
+
+	/* change recs */
+	for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
+		spin_lock_bh(&pmc->mca_lock);
+		if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
+			type = MLD2_BLOCK_OLD_SOURCES;
+			dtype = MLD2_ALLOW_NEW_SOURCES;
+		} else {
+			type = MLD2_ALLOW_NEW_SOURCES;
+			dtype = MLD2_BLOCK_OLD_SOURCES;
+		}
+		skb = add_grec(skb, pmc, type, 0, 0);
+		skb = add_grec(skb, pmc, dtype, 0, 1);	/* deleted sources */
+
+		/* filter mode changes */
+		if (pmc->mca_crcount) {
+			pmc->mca_crcount--;
+			if (pmc->mca_sfmode == MCAST_EXCLUDE)
+				type = MLD2_CHANGE_TO_EXCLUDE;
+			else
+				type = MLD2_CHANGE_TO_INCLUDE;
+			skb = add_grec(skb, pmc, type, 0, 0);
+		}
+		spin_unlock_bh(&pmc->mca_lock);
+	}
+	read_unlock_bh(&idev->lock);
+	if (!skb)
+		return;
+	(void) mld_sendpack(skb);
+}
+
 void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
 {
 	struct sock *sk = igmp6_socket->sk;
@@ -529,7 +1560,7 @@
 	payload_len = len + sizeof(ra);
 	full_len = sizeof(struct ipv6hdr) + payload_len;
 
-	skb = sock_alloc_send_skb(sk, dev->hard_header_len + full_len + 15, 0, &err);
+	skb = sock_alloc_send_skb(sk, dev->hard_header_len + full_len + 15, 1, &err);
 
 	if (skb == NULL)
 		return;
@@ -577,12 +1608,251 @@
 	kfree_skb(skb);
 }
 
+static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
+	struct in6_addr *psfsrc)
+{
+	struct ip6_sf_list *psf, *psf_prev;
+	int rv = 0;
+
+	psf_prev = 0;
+	for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+		if (ipv6_addr_cmp(&psf->sf_addr, psfsrc) == 0)
+			break;
+		psf_prev = psf;
+	}
+	if (!psf || psf->sf_count[sfmode] == 0) {
+		/* source filter not found, or count wrong =>  bug */
+		return -ESRCH;
+	}
+	psf->sf_count[sfmode]--;
+	if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
+		struct inet6_dev *idev = pmc->idev;
+
+		/* no more filters for this source */
+		if (psf_prev)
+			psf_prev->sf_next = psf->sf_next;
+		else
+			pmc->mca_sources = psf->sf_next;
+		if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
+		    !MLD_V1_SEEN(idev)) {
+			psf->sf_crcount = idev->mc_qrv;
+			psf->sf_next = pmc->mca_tomb;
+			pmc->mca_tomb = psf;
+			rv = 1;
+		} else
+			kfree(psf);
+	}
+	return rv;
+}
+
+int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
+	int sfcount, struct in6_addr *psfsrc, int delta)
+{
+	struct ifmcaddr6 *pmc;
+	int	changerec = 0;
+	int	i, err;
+
+	if (!idev)
+		return -ENODEV;
+	read_lock_bh(&idev->lock);
+	for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
+		if (ipv6_addr_cmp(pmca, &pmc->mca_addr) == 0)
+			break;
+	}
+	if (!pmc) {
+		/* MCA not found?? bug */
+		read_unlock_bh(&idev->lock);
+		return -ESRCH;
+	}
+	spin_lock_bh(&pmc->mca_lock);
+	sf_markstate(pmc);
+	if (!delta) {
+		if (!pmc->mca_sfcount[sfmode]) {
+			spin_unlock_bh(&pmc->mca_lock);
+			read_unlock_bh(&idev->lock);
+			return -EINVAL;
+		}
+		pmc->mca_sfcount[sfmode]--;
+	}
+	err = 0;
+	for (i=0; i<sfcount; i++) {
+		int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
+
+		changerec |= rv > 0;
+		if (!err && rv < 0)
+			err = rv;
+	}
+	if (pmc->mca_sfmode == MCAST_EXCLUDE &&
+	    pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
+	    pmc->mca_sfcount[MCAST_INCLUDE]) {
+		struct ip6_sf_list *psf;
+
+		/* filter mode change */
+		pmc->mca_sfmode = MCAST_INCLUDE;
+		pmc->mca_crcount = idev->mc_qrv;
+		idev->mc_ifc_count = pmc->mca_crcount;
+		for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
+			psf->sf_crcount = 0;
+		mld_ifc_event(pmc->idev);
+	} else if (sf_setstate(pmc) || changerec)
+		mld_ifc_event(pmc->idev);
+	spin_unlock_bh(&pmc->mca_lock);
+	read_unlock_bh(&idev->lock);
+	return err;
+}
+
+/*
+ * Add multicast single-source filter to the interface list
+ */
+static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
+	struct in6_addr *psfsrc, int delta)
+{
+	struct ip6_sf_list *psf, *psf_prev;
+
+	psf_prev = 0;
+	for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+		if (ipv6_addr_cmp(&psf->sf_addr, psfsrc) == 0)
+			break;
+		psf_prev = psf;
+	}
+	if (!psf) {
+		psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
+		if (!psf)
+			return -ENOBUFS;
+		memset(psf, 0, sizeof(*psf));
+		psf->sf_addr = *psfsrc;
+		if (psf_prev) {
+			psf_prev->sf_next = psf;
+		} else
+			pmc->mca_sources = psf;
+	}
+	psf->sf_count[sfmode]++;
+	return 0;
+}
+
+static void sf_markstate(struct ifmcaddr6 *pmc)
+{
+	struct ip6_sf_list *psf;
+	int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
+
+	for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
+		if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
+			psf->sf_oldin = mca_xcount ==
+				psf->sf_count[MCAST_EXCLUDE] &&
+				!psf->sf_count[MCAST_INCLUDE];
+		} else
+			psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
+}
+
+static int sf_setstate(struct ifmcaddr6 *pmc)
+{
+	struct ip6_sf_list *psf;
+	int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
+	int qrv = pmc->idev->mc_qrv;
+	int new_in, rv;
+
+	rv = 0;
+	for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+		if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
+			new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
+				!psf->sf_count[MCAST_INCLUDE];
+		} else
+			new_in = psf->sf_count[MCAST_INCLUDE] != 0;
+		if (new_in != psf->sf_oldin) {
+			psf->sf_crcount = qrv;
+			rv++;
+		}
+	}
+	return rv;
+}
+
+/*
+ * Add multicast source filter list to the interface list
+ */
+int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
+	int sfcount, struct in6_addr *psfsrc, int delta)
+{
+	struct ifmcaddr6 *pmc;
+	int	isexclude;
+	int	i, err;
+
+	if (!idev)
+		return -ENODEV;
+	read_lock_bh(&idev->lock);
+	for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
+		if (ipv6_addr_cmp(pmca, &pmc->mca_addr) == 0)
+			break;
+	}
+	if (!pmc) {
+		/* MCA not found?? bug */
+		read_unlock_bh(&idev->lock);
+		return -ESRCH;
+	}
+	spin_lock_bh(&pmc->mca_lock);
+
+	sf_markstate(pmc);
+	isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
+	if (!delta)
+		pmc->mca_sfcount[sfmode]++;
+	err = 0;
+	for (i=0; i<sfcount; i++) {
+		err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
+		if (err)
+			break;
+	}
+	if (err) {
+		int j;
+
+		pmc->mca_sfcount[sfmode]--;
+		for (j=0; j<i; j++)
+			(void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
+	} else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
+		struct inet6_dev *idev = pmc->idev;
+		struct ip6_sf_list *psf;
+
+		/* filter mode change */
+		if (pmc->mca_sfcount[MCAST_EXCLUDE])
+			pmc->mca_sfmode = MCAST_EXCLUDE;
+		else if (pmc->mca_sfcount[MCAST_INCLUDE])
+			pmc->mca_sfmode = MCAST_INCLUDE;
+		/* else no filters; keep old mode for reports */
+
+		pmc->mca_crcount = idev->mc_qrv;
+		idev->mc_ifc_count = pmc->mca_crcount;
+		for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
+			psf->sf_crcount = 0;
+		mld_ifc_event(idev);
+	} else if (sf_setstate(pmc))
+		mld_ifc_event(idev);
+	spin_unlock_bh(&pmc->mca_lock);
+	read_unlock_bh(&idev->lock);
+	return err;
+}
+
+static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
+{
+	struct ip6_sf_list *psf, *nextpsf;
+
+	for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
+		nextpsf = psf->sf_next;
+		kfree(psf);
+	}
+	pmc->mca_tomb = 0;
+	for (psf=pmc->mca_sources; psf; psf=nextpsf) {
+		nextpsf = psf->sf_next;
+		kfree(psf);
+	}
+	pmc->mca_sources = 0;
+	pmc->mca_sfmode = MCAST_EXCLUDE;
+	pmc->mca_sfcount[MCAST_EXCLUDE] = 0;
+	pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
+}
+
 static void igmp6_join_group(struct ifmcaddr6 *ma)
 {
 	unsigned long delay;
 
-	if (IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL ||
-	    ipv6_addr_is_ll_all_nodes(&ma->mca_addr))
+	if (ma->mca_flags & MAF_NOREPORT)
 		return;
 
 	igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
@@ -601,26 +1871,73 @@
 	spin_unlock_bh(&ma->mca_lock);
 }
 
+int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
+	struct inet6_dev *idev)
+{
+	int err;
+
+	if (iml->sflist == 0) {
+		/* any-source empty exclude case */
+		return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, 0, 0);
+	}
+	err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
+		iml->sflist->sl_count, iml->sflist->sl_addr, 0);
+	sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
+	iml->sflist = 0;
+	return err;
+}
+
 static void igmp6_leave_group(struct ifmcaddr6 *ma)
 {
-	if (IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL ||
-	    ipv6_addr_is_ll_all_nodes(&ma->mca_addr))
-		return;
+	if (MLD_V1_SEEN(ma->idev)) {
+		if (ma->mca_flags & MAF_LAST_REPORTER)
+			igmp6_send(&ma->mca_addr, ma->idev->dev,
+				ICMPV6_MGM_REDUCTION);
+	} else {
+		mld_add_delrec(ma->idev, ma);
+		mld_ifc_event(ma->idev);
+	}
+}
 
-	if (ma->mca_flags & MAF_LAST_REPORTER)
-		igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REDUCTION);
+static void mld_gq_timer_expire(unsigned long data)
+{
+	struct inet6_dev *idev = (struct inet6_dev *)data;
 
-	spin_lock_bh(&ma->mca_lock);
-	if (del_timer(&ma->mca_timer))
-		atomic_dec(&ma->mca_refcnt);
-	spin_unlock_bh(&ma->mca_lock);
+	idev->mc_gq_running = 0;
+	mld_send_report(idev, 0);
+	__in6_dev_put(idev);
+}
+
+static void mld_ifc_timer_expire(unsigned long data)
+{
+	struct inet6_dev *idev = (struct inet6_dev *)data;
+
+	mld_send_cr(idev);
+	if (idev->mc_ifc_count) {
+		idev->mc_ifc_count--;
+		if (idev->mc_ifc_count)
+			mld_ifc_start_timer(idev, idev->mc_maxdelay);
+	}
+	__in6_dev_put(idev);
+}
+
+static void mld_ifc_event(struct inet6_dev *idev)
+{
+	if (MLD_V1_SEEN(idev))
+		return;
+	idev->mc_ifc_count = idev->mc_qrv;
+	mld_ifc_start_timer(idev, 1);
 }
 
-void igmp6_timer_handler(unsigned long data)
+
+static void igmp6_timer_handler(unsigned long data)
 {
 	struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
 
-	igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
+	if (MLD_V1_SEEN(ma->idev))
+		igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
+	else
+		mld_send_report(ma->idev, ma);
 
 	spin_lock(&ma->mca_lock);
 	ma->mca_flags |=  MAF_LAST_REPORTER;
@@ -638,9 +1955,18 @@
 	/* Withdraw multicast list */
 
 	read_lock_bh(&idev->lock);
+	idev->mc_ifc_count = 0;
+	if (del_timer(&idev->mc_ifc_timer))
+		__in6_dev_put(idev);
+	idev->mc_gq_running = 0;
+	if (del_timer(&idev->mc_gq_timer))
+		__in6_dev_put(idev);
+
 	for (i = idev->mc_list; i; i=i->next)
 		igmp6_group_dropped(i);
 	read_unlock_bh(&idev->lock);
+
+	mld_clear_delrec(idev);
 }
 
 
@@ -664,6 +1990,22 @@
 {
 	struct in6_addr maddr;
 
+	write_lock_bh(&idev->lock);
+	idev->mc_lock = RW_LOCK_UNLOCKED;
+	idev->mc_gq_running = 0;
+	init_timer(&idev->mc_gq_timer);
+	idev->mc_gq_timer.data = (unsigned long) idev;
+	idev->mc_gq_timer.function = &mld_gq_timer_expire;
+	idev->mc_tomb = 0;
+	idev->mc_ifc_count = 0;
+	init_timer(&idev->mc_ifc_timer);
+	idev->mc_ifc_timer.data = (unsigned long) idev;
+	idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
+	idev->mc_qrv = MLD_QRV_DEFAULT;
+	idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
+	idev->mc_v1_seen = 0;
+	write_unlock_bh(&idev->lock);
+
 	/* Add all-nodes address. */
 	ipv6_addr_all_nodes(&maddr);
 	ipv6_dev_mc_inc(idev->dev, &maddr);
@@ -680,7 +2022,12 @@
 
 	/* Delete all-nodes address. */
 	ipv6_addr_all_nodes(&maddr);
-	ipv6_dev_mc_dec(idev->dev, &maddr);
+
+	/* We cannot call ipv6_dev_mc_dec() directly, our caller in
+	 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
+	 * fail.
+	 */
+	__ipv6_dev_mc_dec(idev->dev, idev, &maddr);
 
 	write_lock_bh(&idev->lock);
 	while ((i = idev->mc_list) != NULL) {
@@ -753,6 +2100,81 @@
 		len=0;
 	return len;
 }
+
+static int ip6_mcf_read_proc(char *buffer, char **start, off_t offset,
+			   int length, int *eof, void *data)
+{
+	off_t pos=0, begin=0;
+	int len=0;
+	int first=1;
+	struct net_device *dev;
+	
+	read_lock(&dev_base_lock);
+	for (dev=dev_base; dev; dev=dev->next) {
+		struct inet6_dev *idev = in6_dev_get(dev);
+		struct ifmcaddr6 *imc;
+
+		if (idev == NULL)
+			continue;
+
+		read_lock_bh(&idev->lock);
+
+		for (imc=idev->mc_list; imc; imc=imc->next) {
+			struct ip6_sf_list *psf;
+			unsigned long i;
+
+			spin_lock_bh(&imc->mca_lock);
+			for (psf=imc->mca_sources; psf; psf=psf->sf_next) {
+				if (first) {
+					len += sprintf(buffer+len, "%3s %6s "
+						"%32s %32s %6s %6s\n", "Idx",
+						"Device", "Multicast Address",
+						"Source Address", "INC", "EXC");
+					first = 0;
+				}
+				len += sprintf(buffer+len,"%3d %6.6s ",
+					dev->ifindex, dev->name);
+
+				for (i=0; i<16; i++)
+					len += sprintf(buffer+len, "%02x",
+						imc->mca_addr.s6_addr[i]);
+				buffer[len++] = ' ';
+				for (i=0; i<16; i++)
+					len += sprintf(buffer+len, "%02x",
+						psf->sf_addr.s6_addr[i]);
+				len += sprintf(buffer+len, " %6lu %6lu\n",
+					psf->sf_count[MCAST_INCLUDE],
+					psf->sf_count[MCAST_EXCLUDE]);
+				pos = begin+len;
+				if (pos < offset) {
+					len=0;
+					begin=pos;
+				}
+				if (pos > offset+length) {
+					spin_unlock_bh(&imc->mca_lock);
+					read_unlock_bh(&idev->lock);
+					in6_dev_put(idev);
+					goto done;
+				}
+			}
+			spin_unlock_bh(&imc->mca_lock);
+		}
+		read_unlock_bh(&idev->lock);
+		in6_dev_put(idev);
+	}
+	*eof = 1;
+
+done:
+	read_unlock(&dev_base_lock);
+
+	*start=buffer+(offset-begin);
+	len-=(offset-begin);
+	if(len>length)
+		len=length;
+	if (len<0)
+		len=0;
+	return len;
+}
 #endif
 
 int __init igmp6_init(struct net_proto_family *ops)
@@ -786,6 +2208,7 @@
 	sk->net_pinfo.af_inet6.hop_limit = 1;
 #ifdef CONFIG_PROC_FS
 	create_proc_read_entry("net/igmp6", 0, 0, igmp6_read_proc, NULL);
+	create_proc_read_entry("net/mcfilter6", 0, 0, ip6_mcf_read_proc, NULL);
 #endif
 
 	return 0;