Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
new file mode 100644
index 0000000..393b6e6
--- /dev/null
+++ b/net/ipv6/mcast.c
@@ -0,0 +1,2499 @@
+/*
+ * Multicast support for IPv6
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ *
+ * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $
+ *
+ * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+/* Changes:
+ *
+ * yoshfuji : fix format of router-alert option
+ * YOSHIFUJI Hideaki @USAGI:
+ * Fixed source address for MLD message based on
+ * <draft-ietf-magma-mld-source-05.txt>.
+ * 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>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/jiffies.h>
+#include <linux/times.h>
+#include <linux/net.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/route.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/if_inet6.h>
+#include <net/ndisc.h>
+#include <net/addrconf.h>
+#include <net/ip6_route.h>
+
+#include <net/ip6_checksum.h>
+
+/* Set to 3 to get tracing... */
+#define MCAST_DEBUG 2
+
+#if MCAST_DEBUG >= 3
+#define MDBG(x) printk x
+#else
+#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];
+};
+
+static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
+
+/* Big mc list lock for all the sockets */
+static DEFINE_RWLOCK(ipv6_sk_mc_lock);
+
+static struct socket *igmp6_socket;
+
+int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
+
+static void igmp6_join_group(struct ifmcaddr6 *ma);
+static void igmp6_leave_group(struct ifmcaddr6 *ma);
+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);
+static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
+ int sfmode, int sfcount, struct in6_addr *psfsrc,
+ int delta);
+static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
+ int sfmode, int sfcount, struct in6_addr *psfsrc,
+ int delta);
+static 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) (ipv6_devconf.force_mld_version == 1 || \
+ (idev)->cnf.force_mld_version == 1 || \
+ ((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)
+
+#define IPV6_MLD_MAX_MSF 10
+
+int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
+
+/*
+ * socket join on multicast group
+ */
+
+int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
+{
+ struct net_device *dev = NULL;
+ struct ipv6_mc_socklist *mc_lst;
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ int err;
+
+ if (!ipv6_addr_is_multicast(addr))
+ return -EINVAL;
+
+ mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
+
+ if (mc_lst == NULL)
+ return -ENOMEM;
+
+ mc_lst->next = NULL;
+ ipv6_addr_copy(&mc_lst->addr, addr);
+
+ if (ifindex == 0) {
+ struct rt6_info *rt;
+ rt = rt6_lookup(addr, 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 == NULL) {
+ sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
+ return -ENODEV;
+ }
+
+ mc_lst->ifindex = dev->ifindex;
+ mc_lst->sfmode = MCAST_EXCLUDE;
+ mc_lst->sflist = NULL;
+
+ /*
+ * now add/increase the group membership on the device
+ */
+
+ err = ipv6_dev_mc_inc(dev, addr);
+
+ if (err) {
+ sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
+ dev_put(dev);
+ return err;
+ }
+
+ write_lock_bh(&ipv6_sk_mc_lock);
+ mc_lst->next = np->ipv6_mc_list;
+ np->ipv6_mc_list = mc_lst;
+ write_unlock_bh(&ipv6_sk_mc_lock);
+
+ dev_put(dev);
+
+ return 0;
+}
+
+/*
+ * socket leave on multicast group
+ */
+int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct ipv6_mc_socklist *mc_lst, **lnk;
+
+ write_lock_bh(&ipv6_sk_mc_lock);
+ for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
+ if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
+ ipv6_addr_equal(&mc_lst->addr, addr)) {
+ struct net_device *dev;
+
+ *lnk = mc_lst->next;
+ write_unlock_bh(&ipv6_sk_mc_lock);
+
+ if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) {
+ struct inet6_dev *idev = in6_dev_get(dev);
+
+ if (idev) {
+ (void) ip6_mc_leave_src(sk,mc_lst,idev);
+ __ipv6_dev_mc_dec(idev, &mc_lst->addr);
+ in6_dev_put(idev);
+ }
+ dev_put(dev);
+ }
+ sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
+ return 0;
+ }
+ }
+ write_unlock_bh(&ipv6_sk_mc_lock);
+
+ return -ENOENT;
+}
+
+static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
+{
+ struct net_device *dev = NULL;
+ struct inet6_dev *idev = NULL;
+
+ 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 NULL;
+ idev = in6_dev_get(dev);
+ if (!idev) {
+ dev_put(dev);
+ return NULL;
+ }
+ read_lock_bh(&idev->lock);
+ if (idev->dead) {
+ read_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ dev_put(dev);
+ return NULL;
+ }
+ return idev;
+}
+
+void ipv6_sock_mc_close(struct sock *sk)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct ipv6_mc_socklist *mc_lst;
+
+ write_lock_bh(&ipv6_sk_mc_lock);
+ while ((mc_lst = np->ipv6_mc_list) != NULL) {
+ struct net_device *dev;
+
+ np->ipv6_mc_list = mc_lst->next;
+ write_unlock_bh(&ipv6_sk_mc_lock);
+
+ 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);
+ __ipv6_dev_mc_dec(idev, &mc_lst->addr);
+ in6_dev_put(idev);
+ }
+ dev_put(dev);
+ }
+
+ sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
+
+ write_lock_bh(&ipv6_sk_mc_lock);
+ }
+ write_unlock_bh(&ipv6_sk_mc_lock);
+}
+
+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 = inet6_sk(sk);
+ 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_is_multicast(group))
+ 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 (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
+ continue;
+ if (ipv6_addr_equal(&pmc->addr, group))
+ 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_add_src(idev, group, omode, 0, NULL, 0);
+ ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
+ pmc->sfmode = omode;
+ }
+
+ psl = pmc->sflist;
+ if (!add) {
+ if (!psl)
+ goto done;
+ rv = !0;
+ for (i=0; i<psl->sl_count; i++) {
+ rv = memcmp(&psl->sl_addr[i], source,
+ 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 >= sysctl_mld_max_msf) {
+ err = -ENOBUFS;
+ goto done;
+ }
+ 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[i], source, 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 = inet6_sk(sk);
+ struct ip6_sf_socklist *newpsl, *psl;
+ int i, err;
+
+ group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
+
+ if (!ipv6_addr_is_multicast(group))
+ 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_equal(&pmc->addr, group))
+ 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 = NULL;
+ 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, NULL, 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 __user *optval, int __user *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 = inet6_sk(sk);
+ struct ip6_sf_socklist *psl;
+
+ group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
+
+ if (!ipv6_addr_is_multicast(group))
+ 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_equal(group, &pmc->addr))
+ 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(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(&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 = inet6_sk(sk);
+ struct ipv6_mc_socklist *mc;
+ struct ip6_sf_socklist *psl;
+ int rv = 1;
+
+ read_lock(&ipv6_sk_mc_lock);
+ for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
+ if (ipv6_addr_equal(&mc->addr, mc_addr))
+ 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_equal(&psl->sl_addr[i], src_addr))
+ 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 rv;
+}
+
+static void ma_put(struct ifmcaddr6 *mc)
+{
+ if (atomic_dec_and_test(&mc->mca_refcnt)) {
+ in6_dev_put(mc->idev);
+ kfree(mc);
+ }
+}
+
+static void igmp6_group_added(struct ifmcaddr6 *mc)
+{
+ struct net_device *dev = mc->idev->dev;
+ char buf[MAX_ADDR_LEN];
+
+ spin_lock_bh(&mc->mca_lock);
+ if (!(mc->mca_flags&MAF_LOADED)) {
+ mc->mca_flags |= MAF_LOADED;
+ if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
+ dev_mc_add(dev, buf, dev->addr_len, 0);
+ }
+ spin_unlock_bh(&mc->mca_lock);
+
+ if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
+ return;
+
+ if (MLD_V1_SEEN(mc->idev)) {
+ igmp6_join_group(mc);
+ return;
+ }
+ /* else v2 */
+
+ mc->mca_crcount = mc->idev->mc_qrv;
+ mld_ifc_event(mc->idev);
+}
+
+static void igmp6_group_dropped(struct ifmcaddr6 *mc)
+{
+ struct net_device *dev = mc->idev->dev;
+ char buf[MAX_ADDR_LEN];
+
+ spin_lock_bh(&mc->mca_lock);
+ if (mc->mca_flags&MAF_LOADED) {
+ mc->mca_flags &= ~MAF_LOADED;
+ 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 (!mc->idev->dead)
+ igmp6_leave_group(mc);
+
+ 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);
+ spin_lock_init(&pmc->mca_lock);
+ 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 = NULL;
+ 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 = NULL;
+ for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
+ if (ipv6_addr_equal(&pmc->mca_addr, pmca))
+ 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 = NULL;
+ 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 = NULL;
+ spin_unlock_bh(&pmc->mca_lock);
+ for (; psf; psf=psf_next) {
+ psf_next = psf->sf_next;
+ kfree(psf);
+ }
+ }
+ read_unlock_bh(&idev->lock);
+}
+
+
+/*
+ * device multicast group inc (add if not found)
+ */
+int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
+{
+ struct ifmcaddr6 *mc;
+ struct inet6_dev *idev;
+
+ idev = in6_dev_get(dev);
+
+ if (idev == NULL)
+ return -EINVAL;
+
+ write_lock_bh(&idev->lock);
+ if (idev->dead) {
+ write_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ return -ENODEV;
+ }
+
+ for (mc = idev->mc_list; mc; mc = mc->next) {
+ if (ipv6_addr_equal(&mc->mca_addr, addr)) {
+ mc->mca_users++;
+ write_unlock_bh(&idev->lock);
+ ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
+ NULL, 0);
+ in6_dev_put(idev);
+ return 0;
+ }
+ }
+
+ /*
+ * not found: create a new one.
+ */
+
+ mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
+
+ if (mc == NULL) {
+ write_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ return -ENOMEM;
+ }
+
+ memset(mc, 0, sizeof(struct ifmcaddr6));
+ init_timer(&mc->mca_timer);
+ mc->mca_timer.function = igmp6_timer_handler;
+ mc->mca_timer.data = (unsigned long) mc;
+
+ ipv6_addr_copy(&mc->mca_addr, addr);
+ mc->idev = idev;
+ mc->mca_users = 1;
+ /* mca_stamp should be updated upon changes */
+ mc->mca_cstamp = mc->mca_tstamp = jiffies;
+ atomic_set(&mc->mca_refcnt, 2);
+ spin_lock_init(&mc->mca_lock);
+
+ /* initial mode is (EX, empty) */
+ mc->mca_sfmode = MCAST_EXCLUDE;
+ mc->mca_sfcount[MCAST_EXCLUDE] = 1;
+
+ if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
+ 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;
+}
+
+/*
+ * device multicast group del
+ */
+int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
+{
+ struct ifmcaddr6 *ma, **map;
+
+ write_lock_bh(&idev->lock);
+ for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
+ if (ipv6_addr_equal(&ma->mca_addr, addr)) {
+ if (--ma->mca_users == 0) {
+ *map = ma->next;
+ write_unlock_bh(&idev->lock);
+
+ igmp6_group_dropped(ma);
+
+ ma_put(ma);
+ return 0;
+ }
+ write_unlock_bh(&idev->lock);
+ return 0;
+ }
+ }
+ write_unlock_bh(&idev->lock);
+
+ 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(idev, addr);
+
+ in6_dev_put(idev);
+
+ return err;
+}
+
+/*
+ * identify MLD packets for MLD filter exceptions
+ */
+int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
+{
+ struct icmp6hdr *pic;
+
+ if (nexthdr != IPPROTO_ICMPV6)
+ return 0;
+
+ if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
+ return 0;
+
+ pic = (struct icmp6hdr *)skb->h.raw;
+
+ switch (pic->icmp6_type) {
+ case ICMPV6_MGM_QUERY:
+ case ICMPV6_MGM_REPORT:
+ case ICMPV6_MGM_REDUCTION:
+ case ICMPV6_MLD2_REPORT:
+ return 1;
+ default:
+ break;
+ }
+ return 0;
+}
+
+/*
+ * check if the interface/address pair is valid
+ */
+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_equal(&mc->mca_addr, group))
+ break;
+ }
+ if (mc) {
+ if (src_addr && !ipv6_addr_any(src_addr)) {
+ struct ip6_sf_list *psf;
+
+ spin_lock_bh(&mc->mca_lock);
+ for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
+ if (ipv6_addr_equal(&psf->sf_addr, src_addr))
+ 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);
+ } else
+ rv = 1; /* don't filter unspecified source */
+ }
+ read_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ }
+ 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);
+}
+
+/*
+ * IGMP handling (alias multicast ICMPv6 messages)
+ */
+
+static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
+{
+ unsigned long delay = resptime;
+
+ /* Do not start timer for these addresses */
+ if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
+ IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
+ return;
+
+ if (del_timer(&ma->mca_timer)) {
+ atomic_dec(&ma->mca_refcnt);
+ delay = ma->mca_timer.expires - jiffies;
+ }
+
+ if (delay >= resptime) {
+ if (resptime)
+ delay = net_random() % resptime;
+ else
+ delay = 1;
+ }
+ ma->mca_timer.expires = jiffies + delay;
+ if (!mod_timer(&ma->mca_timer, jiffies + delay))
+ atomic_inc(&ma->mca_refcnt);
+ ma->mca_flags |= MAF_TIMER_RUNNING;
+}
+
+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_equal(&srcs[i], &psf->sf_addr)) {
+ 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 *group;
+ unsigned long max_delay;
+ struct inet6_dev *idev;
+ struct icmp6hdr *hdr;
+ int group_type;
+ int mark = 0;
+ int len;
+
+ if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
+ return -EINVAL;
+
+ /* compute payload length excluding extension headers */
+ len = ntohs(skb->nh.ipv6h->payload_len) + sizeof(struct ipv6hdr);
+ len -= (char *)skb->h.raw - (char *)skb->nh.ipv6h;
+
+ /* Drop queries with not link local source */
+ if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
+ return -EINVAL;
+
+ idev = in6_dev_get(skb->dev);
+
+ if (idev == NULL)
+ return 0;
+
+ 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)/1000;
+
+ 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)/1000;
+ 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 (group_type != IPV6_ADDR_ANY &&
+ !ipv6_addr_equal(group, &ma->mca_addr))
+ 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_bh(&idev->lock);
+ in6_dev_put(idev);
+
+ return 0;
+}
+
+
+int igmp6_event_report(struct sk_buff *skb)
+{
+ struct ifmcaddr6 *ma;
+ struct in6_addr *addrp;
+ struct inet6_dev *idev;
+ struct icmp6hdr *hdr;
+ int addr_type;
+
+ /* Our own report looped back. Ignore it. */
+ if (skb->pkt_type == PACKET_LOOPBACK)
+ return 0;
+
+ if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
+ return -EINVAL;
+
+ hdr = (struct icmp6hdr*) skb->h.raw;
+
+ /* Drop reports with not link local source */
+ addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr);
+ if (addr_type != IPV6_ADDR_ANY &&
+ !(addr_type&IPV6_ADDR_LINKLOCAL))
+ return -EINVAL;
+
+ addrp = (struct in6_addr *) (hdr + 1);
+
+ idev = in6_dev_get(skb->dev);
+ if (idev == NULL)
+ return -ENODEV;
+
+ /*
+ * Cancel the timer for this group
+ */
+
+ read_lock_bh(&idev->lock);
+ for (ma = idev->mc_list; ma; ma=ma->next) {
+ if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
+ spin_lock(&ma->mca_lock);
+ if (del_timer(&ma->mca_timer))
+ atomic_dec(&ma->mca_refcnt);
+ ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
+ spin_unlock(&ma->mca_lock);
+ break;
+ }
+ }
+ 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 };
+
+ /* we assume size > sizeof(ra) here */
+ skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
+
+ if (skb == 0)
+ return NULL;
+
+ skb_reserve(skb, LL_RESERVED_SPACE(dev));
+ 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 NULL;
+ }
+ }
+
+ if (ipv6_get_lladdr(dev, &addr_buf)) {
+ /* <draft-ietf-magma-mld-source-05.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;
+ struct inet6_dev *idev = in6_dev_get(skb->dev);
+ int err;
+
+ IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
+ 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));
+ err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
+ dev_queue_xmit);
+ if (!err) {
+ ICMP6_INC_STATS(idev,ICMP6_MIB_OUTMSGS);
+ IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
+ } else
+ IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+
+ if (likely(idev != NULL))
+ in6_dev_put(idev);
+}
+
+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 NULL;
+ 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 = NULL;
+ 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 = NULL; /* add_grhead will get a new one */
+ }
+ skb = add_grhead(skb, pmc, type, &pgr);
+ }
+ return skb;
+ }
+ pmr = skb ? (struct mld2_report *)skb->h.raw : NULL;
+
+ /* 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 = NULL;
+ 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 = NULL;
+ 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 = NULL;
+ 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 = NULL;
+ int type, dtype;
+
+ read_lock_bh(&idev->lock);
+ write_lock_bh(&idev->mc_lock);
+
+ /* deleted MCA's */
+ pmc_prev = NULL;
+ 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);
+}
+
+static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
+{
+ struct sock *sk = igmp6_socket->sk;
+ struct inet6_dev *idev;
+ struct sk_buff *skb;
+ struct icmp6hdr *hdr;
+ struct in6_addr *snd_addr;
+ struct in6_addr *addrp;
+ struct in6_addr addr_buf;
+ struct in6_addr all_routers;
+ int err, len, payload_len, full_len;
+ u8 ra[8] = { IPPROTO_ICMPV6, 0,
+ IPV6_TLV_ROUTERALERT, 2, 0, 0,
+ IPV6_TLV_PADN, 0 };
+
+ IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
+ snd_addr = addr;
+ if (type == ICMPV6_MGM_REDUCTION) {
+ snd_addr = &all_routers;
+ ipv6_addr_all_routers(&all_routers);
+ }
+
+ len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
+ payload_len = len + sizeof(ra);
+ full_len = sizeof(struct ipv6hdr) + payload_len;
+
+ skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
+
+ if (skb == NULL) {
+ IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ return;
+ }
+
+ skb_reserve(skb, LL_RESERVED_SPACE(dev));
+ if (dev->hard_header) {
+ unsigned char ha[MAX_ADDR_LEN];
+ ndisc_mc_map(snd_addr, ha, dev, 1);
+ if (dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len) < 0)
+ goto out;
+ }
+
+ if (ipv6_get_lladdr(dev, &addr_buf)) {
+ /* <draft-ietf-magma-mld-source-05.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, snd_addr, NEXTHDR_HOP, payload_len);
+
+ memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
+
+ hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
+ memset(hdr, 0, sizeof(struct icmp6hdr));
+ hdr->icmp6_type = type;
+
+ addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
+ ipv6_addr_copy(addrp, addr);
+
+ hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
+ IPPROTO_ICMPV6,
+ csum_partial((__u8 *) hdr, len, 0));
+
+ idev = in6_dev_get(skb->dev);
+
+ err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
+ dev_queue_xmit);
+ if (!err) {
+ if (type == ICMPV6_MGM_REDUCTION)
+ ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBREDUCTIONS);
+ else
+ ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBRESPONSES);
+ ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
+ IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
+ } else
+ IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+
+ if (likely(idev != NULL))
+ in6_dev_put(idev);
+ return;
+
+out:
+ IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
+ 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 = NULL;
+ for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+ if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
+ 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;
+}
+
+static 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_equal(pmca, &pmc->mca_addr))
+ 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 = NULL;
+ for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
+ if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
+ 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
+ */
+static 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_equal(pmca, &pmc->mca_addr))
+ 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;
+
+ if (!delta)
+ 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 = NULL;
+ for (psf=pmc->mca_sources; psf; psf=nextpsf) {
+ nextpsf = psf->sf_next;
+ kfree(psf);
+ }
+ pmc->mca_sources = NULL;
+ 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 (ma->mca_flags & MAF_NOREPORT)
+ return;
+
+ igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
+
+ delay = net_random() % IGMP6_UNSOLICITED_IVAL;
+
+ spin_lock_bh(&ma->mca_lock);
+ if (del_timer(&ma->mca_timer)) {
+ atomic_dec(&ma->mca_refcnt);
+ delay = ma->mca_timer.expires - jiffies;
+ }
+
+ if (!mod_timer(&ma->mca_timer, jiffies + delay))
+ atomic_inc(&ma->mca_refcnt);
+ ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
+ spin_unlock_bh(&ma->mca_lock);
+}
+
+static 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, NULL, 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 = NULL;
+ return err;
+}
+
+static void igmp6_leave_group(struct ifmcaddr6 *ma)
+{
+ 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);
+ }
+}
+
+static void mld_gq_timer_expire(unsigned long data)
+{
+ struct inet6_dev *idev = (struct inet6_dev *)data;
+
+ idev->mc_gq_running = 0;
+ mld_send_report(idev, NULL);
+ __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);
+}
+
+
+static void igmp6_timer_handler(unsigned long data)
+{
+ struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
+
+ 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;
+ ma->mca_flags &= ~MAF_TIMER_RUNNING;
+ spin_unlock(&ma->mca_lock);
+ ma_put(ma);
+}
+
+/* Device going down */
+
+void ipv6_mc_down(struct inet6_dev *idev)
+{
+ struct ifmcaddr6 *i;
+
+ /* 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);
+}
+
+
+/* Device going up */
+
+void ipv6_mc_up(struct inet6_dev *idev)
+{
+ struct ifmcaddr6 *i;
+
+ /* Install multicast list, except for all-nodes (already installed) */
+
+ read_lock_bh(&idev->lock);
+ for (i = idev->mc_list; i; i=i->next)
+ igmp6_group_added(i);
+ read_unlock_bh(&idev->lock);
+}
+
+/* IPv6 device initialization. */
+
+void ipv6_mc_init_dev(struct inet6_dev *idev)
+{
+ struct in6_addr maddr;
+
+ write_lock_bh(&idev->lock);
+ rwlock_init(&idev->mc_lock);
+ 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 = NULL;
+ 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);
+}
+
+/*
+ * Device is about to be destroyed: clean up.
+ */
+
+void ipv6_mc_destroy_dev(struct inet6_dev *idev)
+{
+ struct ifmcaddr6 *i;
+ struct in6_addr maddr;
+
+ /* Deactivate timers */
+ ipv6_mc_down(idev);
+
+ /* Delete all-nodes address. */
+ ipv6_addr_all_nodes(&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, &maddr);
+
+ if (idev->cnf.forwarding) {
+ ipv6_addr_all_routers(&maddr);
+ __ipv6_dev_mc_dec(idev, &maddr);
+ }
+
+ write_lock_bh(&idev->lock);
+ while ((i = idev->mc_list) != NULL) {
+ idev->mc_list = i->next;
+ write_unlock_bh(&idev->lock);
+
+ igmp6_group_dropped(i);
+ ma_put(i);
+
+ write_lock_bh(&idev->lock);
+ }
+ write_unlock_bh(&idev->lock);
+}
+
+#ifdef CONFIG_PROC_FS
+struct igmp6_mc_iter_state {
+ struct net_device *dev;
+ struct inet6_dev *idev;
+};
+
+#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
+
+static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
+{
+ struct ifmcaddr6 *im = NULL;
+ struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
+
+ for (state->dev = dev_base, state->idev = NULL;
+ state->dev;
+ state->dev = state->dev->next) {
+ struct inet6_dev *idev;
+ idev = in6_dev_get(state->dev);
+ if (!idev)
+ continue;
+ read_lock_bh(&idev->lock);
+ im = idev->mc_list;
+ if (im) {
+ state->idev = idev;
+ break;
+ }
+ read_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ }
+ return im;
+}
+
+static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
+{
+ struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
+
+ im = im->next;
+ while (!im) {
+ if (likely(state->idev != NULL)) {
+ read_unlock_bh(&state->idev->lock);
+ in6_dev_put(state->idev);
+ }
+ state->dev = state->dev->next;
+ if (!state->dev) {
+ state->idev = NULL;
+ break;
+ }
+ state->idev = in6_dev_get(state->dev);
+ if (!state->idev)
+ continue;
+ read_lock_bh(&state->idev->lock);
+ im = state->idev->mc_list;
+ }
+ return im;
+}
+
+static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
+ if (im)
+ while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
+ --pos;
+ return pos ? NULL : im;
+}
+
+static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock(&dev_base_lock);
+ return igmp6_mc_get_idx(seq, *pos);
+}
+
+static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct ifmcaddr6 *im;
+ im = igmp6_mc_get_next(seq, v);
+ ++*pos;
+ return im;
+}
+
+static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
+{
+ struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
+ if (likely(state->idev != NULL)) {
+ read_unlock_bh(&state->idev->lock);
+ in6_dev_put(state->idev);
+ state->idev = NULL;
+ }
+ state->dev = NULL;
+ read_unlock(&dev_base_lock);
+}
+
+static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
+{
+ struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
+ struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
+
+ seq_printf(seq,
+ "%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n",
+ state->dev->ifindex, state->dev->name,
+ NIP6(im->mca_addr),
+ im->mca_users, im->mca_flags,
+ (im->mca_flags&MAF_TIMER_RUNNING) ?
+ jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
+ return 0;
+}
+
+static struct seq_operations igmp6_mc_seq_ops = {
+ .start = igmp6_mc_seq_start,
+ .next = igmp6_mc_seq_next,
+ .stop = igmp6_mc_seq_stop,
+ .show = igmp6_mc_seq_show,
+};
+
+static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ int rc = -ENOMEM;
+ struct igmp6_mc_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+
+ if (!s)
+ goto out;
+
+ rc = seq_open(file, &igmp6_mc_seq_ops);
+ if (rc)
+ goto out_kfree;
+
+ seq = file->private_data;
+ seq->private = s;
+ memset(s, 0, sizeof(*s));
+out:
+ return rc;
+out_kfree:
+ kfree(s);
+ goto out;
+}
+
+static struct file_operations igmp6_mc_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = igmp6_mc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+struct igmp6_mcf_iter_state {
+ struct net_device *dev;
+ struct inet6_dev *idev;
+ struct ifmcaddr6 *im;
+};
+
+#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
+
+static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
+{
+ struct ip6_sf_list *psf = NULL;
+ struct ifmcaddr6 *im = NULL;
+ struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
+
+ for (state->dev = dev_base, state->idev = NULL, state->im = NULL;
+ state->dev;
+ state->dev = state->dev->next) {
+ struct inet6_dev *idev;
+ idev = in6_dev_get(state->dev);
+ if (unlikely(idev == NULL))
+ continue;
+ read_lock_bh(&idev->lock);
+ im = idev->mc_list;
+ if (likely(im != NULL)) {
+ spin_lock_bh(&im->mca_lock);
+ psf = im->mca_sources;
+ if (likely(psf != NULL)) {
+ state->im = im;
+ state->idev = idev;
+ break;
+ }
+ spin_unlock_bh(&im->mca_lock);
+ }
+ read_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ }
+ return psf;
+}
+
+static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
+{
+ struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
+
+ psf = psf->sf_next;
+ while (!psf) {
+ spin_unlock_bh(&state->im->mca_lock);
+ state->im = state->im->next;
+ while (!state->im) {
+ if (likely(state->idev != NULL)) {
+ read_unlock_bh(&state->idev->lock);
+ in6_dev_put(state->idev);
+ }
+ state->dev = state->dev->next;
+ if (!state->dev) {
+ state->idev = NULL;
+ goto out;
+ }
+ state->idev = in6_dev_get(state->dev);
+ if (!state->idev)
+ continue;
+ read_lock_bh(&state->idev->lock);
+ state->im = state->idev->mc_list;
+ }
+ if (!state->im)
+ break;
+ spin_lock_bh(&state->im->mca_lock);
+ psf = state->im->mca_sources;
+ }
+out:
+ return psf;
+}
+
+static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
+ if (psf)
+ while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
+ --pos;
+ return pos ? NULL : psf;
+}
+
+static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock(&dev_base_lock);
+ return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
+}
+
+static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct ip6_sf_list *psf;
+ if (v == SEQ_START_TOKEN)
+ psf = igmp6_mcf_get_first(seq);
+ else
+ psf = igmp6_mcf_get_next(seq, v);
+ ++*pos;
+ return psf;
+}
+
+static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
+{
+ struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
+ if (likely(state->im != NULL)) {
+ spin_unlock_bh(&state->im->mca_lock);
+ state->im = NULL;
+ }
+ if (likely(state->idev != NULL)) {
+ read_unlock_bh(&state->idev->lock);
+ in6_dev_put(state->idev);
+ state->idev = NULL;
+ }
+ state->dev = NULL;
+ read_unlock(&dev_base_lock);
+}
+
+static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
+{
+ struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
+ struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
+
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq,
+ "%3s %6s "
+ "%32s %32s %6s %6s\n", "Idx",
+ "Device", "Multicast Address",
+ "Source Address", "INC", "EXC");
+ } else {
+ seq_printf(seq,
+ "%3d %6.6s "
+ "%04x%04x%04x%04x%04x%04x%04x%04x "
+ "%04x%04x%04x%04x%04x%04x%04x%04x "
+ "%6lu %6lu\n",
+ state->dev->ifindex, state->dev->name,
+ NIP6(state->im->mca_addr),
+ NIP6(psf->sf_addr),
+ psf->sf_count[MCAST_INCLUDE],
+ psf->sf_count[MCAST_EXCLUDE]);
+ }
+ return 0;
+}
+
+static struct seq_operations igmp6_mcf_seq_ops = {
+ .start = igmp6_mcf_seq_start,
+ .next = igmp6_mcf_seq_next,
+ .stop = igmp6_mcf_seq_stop,
+ .show = igmp6_mcf_seq_show,
+};
+
+static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ int rc = -ENOMEM;
+ struct igmp6_mcf_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+
+ if (!s)
+ goto out;
+
+ rc = seq_open(file, &igmp6_mcf_seq_ops);
+ if (rc)
+ goto out_kfree;
+
+ seq = file->private_data;
+ seq->private = s;
+ memset(s, 0, sizeof(*s));
+out:
+ return rc;
+out_kfree:
+ kfree(s);
+ goto out;
+}
+
+static struct file_operations igmp6_mcf_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = igmp6_mcf_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+#endif
+
+int __init igmp6_init(struct net_proto_family *ops)
+{
+ struct ipv6_pinfo *np;
+ struct sock *sk;
+ int err;
+
+ err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket);
+ if (err < 0) {
+ printk(KERN_ERR
+ "Failed to initialize the IGMP6 control socket (err %d).\n",
+ err);
+ igmp6_socket = NULL; /* For safety. */
+ return err;
+ }
+
+ sk = igmp6_socket->sk;
+ sk->sk_allocation = GFP_ATOMIC;
+ sk->sk_prot->unhash(sk);
+
+ np = inet6_sk(sk);
+ np->hop_limit = 1;
+
+#ifdef CONFIG_PROC_FS
+ proc_net_fops_create("igmp6", S_IRUGO, &igmp6_mc_seq_fops);
+ proc_net_fops_create("mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
+#endif
+
+ return 0;
+}
+
+void igmp6_cleanup(void)
+{
+ sock_release(igmp6_socket);
+ igmp6_socket = NULL; /* for safety */
+
+#ifdef CONFIG_PROC_FS
+ proc_net_remove("mcfilter6");
+ proc_net_remove("igmp6");
+#endif
+}